D-Link DES-3528 - xStack Switch - Stackable Operation & User’s Manual

Layer 2 Managed Stackable Fast Ethernet Switch Release 2.0

_________________________________________________________________________________ Information in this document is subject to change without notice. © 2009 D-Link Corporation. All rights reserved. Reproduction in any manner whatsoever without the written permission of D-Link Corporation is strictly forbidden. Trademarks used in this text: D-Link and the D-LINK logo are trademarks of D-Link Corporation; Microsoft and Windows are registered trademarks of Microsoft Corporation. Other trademarks and trade names may be used in this document to refer to either the entities claiming the marks and names or their products. D-Link Corporation disclaims any proprietary interest in trademarks and trade names other than its own. September 2009 P/N 651ES3500055G

ii Table of Contents Web-based Switch Configuration ............................................................................................... 11 Introduction ................................................................................................................................................................. 11 Login to Web Manager ............................................................................................................................................................. 11 Web-based User Interface ....................................................................................................................................................... 12 Web Pages .............................................................................................................................................................................. 13 Configuration ............................................................................................................................... 14 Device Information ...................................................................................................................................................... 15 System Information ..................................................................................................................................................... 15 Serial Port Settings ..................................................................................................................................................... 16 IP Address .................................................................................................................................................................. 16 Port Configuration ....................................................................................................................................................... 19 Port Settings ............................................................................................................................................................................ 19 Port Description ....................................................................................................................................................................... 21 Port Error Disabled .................................................................................................................................................................. 21 Static ARP Settings .................................................................................................................................................... 22 User Accounts ............................................................................................................................................................ 23 System Log Configuration .......................................................................................................................................... 24 System Log Settings ................................................................................................................................................................ 24 System Log Server .................................................................................................................................................................. 25 System Severity Settings ............................................................................................................................................ 26 DHCP Relay................................................................................................................................................................ 27 DHCP Relay Global Settings ................................................................................................................................................... 27 DHCP Relay Interface Settings ................................................................................................................................................ 30 DHCP Relay Option 60 Default Settings .................................................................................................................................. 30 DHCP Relay Option 60 Settings .............................................................................................................................................. 31 DHCP Relay Option 61 Default Settings .................................................................................................................................. 32 DHCP Relay Option 61 Settings .............................................................................................................................................. 32 DHCP Local Relay Settings ........................................................................................................................................ 33 DHCP Auto Configuration Settings ............................................................................................................................. 33 MAC Address Aging Time .......................................................................................................................................... 34 Web Settings .............................................................................................................................................................. 34 Telnet Settings ............................................................................................................................................................ 34 Password Encryption .................................................................................................................................................. 34 Clipaging Settings ....................................................................................................................................................... 35 Firmware Information .................................................................................................................................................. 35 Dual Configuration Settings ........................................................................................................................................ 36 PPPoE Circuit ID Insertion Settings ........................................................................................................................... 37 Ping Test ..................................................................................................................................................................... 37 SNTP Settings ............................................................................................................................................................ 38

iii Time Settings ........................................................................................................................................................................... 38 TimeZone Settings ................................................................................................................................................................... 39 MAC Notification Settings ........................................................................................................................................... 40 MAC Notification Global Settings ............................................................................................................................................. 40 MAC Notification Port Settings ................................................................................................................................................. 41 PoE ............................................................................................................................................................................. 42 PoE System Settings ............................................................................................................................................................... 43 PoE Port Settings ..................................................................................................................................................................... 44 SNMP Settings ........................................................................................................................................................... 45 SNMP Global Settings ............................................................................................................................................................. 46 SNMP View Table .................................................................................................................................................................... 46 SNMP Group Table .................................................................................................................................................................. 47 SNMP User Table .................................................................................................................................................................... 48 SNMP Community Table.......................................................................................................................................................... 49 SNMP Host Table .................................................................................................................................................................... 50 SNMP Engine ID ...................................................................................................................................................................... 50 SNMP Trap Configuration ........................................................................................................................................................ 51 sFlow ........................................................................................................................................................................... 51 sFlow Global State Settings ..................................................................................................................................................... 51 sFlow Analyzer Server Settings ............................................................................................................................................... 52 sFlow Flow Sampler Settings ................................................................................................................................................... 52 sFlow Counter Poller Settings .................................................................................................................................................. 53 Stacking ...................................................................................................................................................................... 54 Stacking Mode Settings ........................................................................................................................................................... 56 Time Range Settings .................................................................................................................................................. 56 Single IP Management ............................................................................................................................................... 57 Single IP Settings ..................................................................................................................................................................... 58 Topology .................................................................................................................................................................................. 59 Tool Tips .................................................................................................................................................................................. 62 Right-Click................................................................................................................................................................................ 63 Menu Bar ................................................................................................................................................................................. 65 Firmware Upgrade ................................................................................................................................................................... 66 Configuration File Backup/Restore .......................................................................................................................................... 66 Upload Log File ........................................................................................................................................................................ 66 L2 Features ................................................................................................................................... 68 Jumbo Frame .............................................................................................................................................................. 68 VLANs ......................................................................................................................................................................... 69 Understanding IEEE 802.1p Priority ........................................................................................................................................ 69 VLAN Description ..................................................................................................................................................................... 69 IEEE 802.1Q VLANs ................................................................................................................................................................ 70 Double VLANs ......................................................................................................................................................................... 73 802.1Q VLAN ........................................................................................................................................................................... 75 Voice VLAN................................................................................................................................................................. 79 Voice VLAN Global Settings .................................................................................................................................................... 79

iv Voice VLAN Port Settings ........................................................................................................................................................ 80 Voice VLAN OUI Settings ........................................................................................................................................................ 81 Subnet-based VLAN ................................................................................................................................................... 82 Subnet-based VLAN Settings .................................................................................................................................................. 83 VLAN Precedence Settings...................................................................................................................................................... 84 Q-in-Q ......................................................................................................................................................................... 85 Q-in-Q Settings ........................................................................................................................................................................ 85 VLAN Translation Settings ....................................................................................................................................................... 86 Q-in-Q and VLAN Translation Rules ........................................................................................................................................ 87 802.1v Protocol VLAN ................................................................................................................................................ 87 802.1v Protocol Group Settings ............................................................................................................................................... 87 802.1v Protocol VLAN Settings ................................................................................................................................................ 88 RSPAN Settings ......................................................................................................................................................... 89 GVRP Settings ............................................................................................................................................................ 90 GVRP Timer Settings ................................................................................................................................................. 91 Asymmetric VLAN Settings ......................................................................................................................................... 91 MAC-based VLAN Settings ........................................................................................................................................ 92 PVID Auto Assign Settings ......................................................................................................................................... 92 VLAN Trunk Settings .................................................................................................................................................. 93 Port Trunking .............................................................................................................................................................. 94 LACP Port Settings ..................................................................................................................................................... 96 Traffic Segmentation ................................................................................................................................................... 97 IGMP Snooping .......................................................................................................................................................... 98 IGMP Snooping Settings .......................................................................................................................................................... 98 IGMP Snooping Rate Limit Settings ....................................................................................................................................... 100 IGMP Snooping Static Group Settings ................................................................................................................................... 101 IGMP Multicast Group Profile Settings ................................................................................................................................... 101 IGMP Snooping Multicast VLAN Settings .............................................................................................................................. 102 IPv4 Multicast Profile Settings ................................................................................................................................................ 103 IPv4 Limited Multicast Range Settings ................................................................................................................................... 104 IPv4 Max Multicast Group Settings ........................................................................................................................................ 104 Multicast Filtering Mode ......................................................................................................................................................... 105 CPU Filter L3 Control Packet Settings ................................................................................................................................... 106 MLD Snooping Settings ............................................................................................................................................ 107 MLD Snooping Settings ......................................................................................................................................................... 107 MLD Snooping Rate Limit Settings ........................................................................................................................................ 110 MLD Snooping Static Group Settings .................................................................................................................................... 111 MLD Multicast Group Profile Settings .................................................................................................................................... 111 MLD Snooping Multicast VLAN Settings ................................................................................................................................ 112 Port Mirror ................................................................................................................................................................. 113 Loopback Detection Settings .................................................................................................................................... 114 BPDU Attack Protection Settings ............................................................................................................................. 115 Spanning Tree .......................................................................................................................................................... 116

v STP Bridge Global Settings ................................................................................................................................................... 118 STP Port Settings .................................................................................................................................................................. 120 MST Configuration Identification ............................................................................................................................................ 121 STP Instance Settings ........................................................................................................................................................... 122 MSTP Port Information .......................................................................................................................................................... 123 Forwarding & Filtering ............................................................................................................................................... 124 Unicast Forwarding ................................................................................................................................................................ 124 Multicast Forwarding .............................................................................................................................................................. 124 LLDP ......................................................................................................................................................................... 125 LLDP Global Settings ............................................................................................................................................................. 125 LLDP Port Settings ................................................................................................................................................................ 126 LLDP Management Address List ........................................................................................................................................... 127 LLDP Basic TLVs Settings ..................................................................................................................................................... 128 LLDP Dot1 TLVs Settings ...................................................................................................................................................... 129 LLDP Dot3 TLVs Settings ...................................................................................................................................................... 130 LLDP Statistics System .......................................................................................................................................................... 131 LLDP Local Port Information .................................................................................................................................................. 131 LLDP Remote Port Information .............................................................................................................................................. 132 CFM .......................................................................................................................................................................... 133 CFM Port Settings .................................................................................................................................................................. 133 CFM CCM PDUs Forwarding Mode ....................................................................................................................................... 133 CFM MPs Reply LTRs ........................................................................................................................................................... 134 CFM Mipccm List ................................................................................................................................................................... 134 Connectivity Fault Management Settings ............................................................................................................................... 135 CFM Loopback Settings ......................................................................................................................................................... 136 CFM Linktrace Settings .......................................................................................................................................................... 137 CFM Packet Counter List ....................................................................................................................................................... 138 CFM Packet Counter CCM List .............................................................................................................................................. 138 Browse CFM Fault Mep ......................................................................................................................................................... 139 Browse CFM Port MP List ...................................................................................................................................................... 139 Ethernet OAM ........................................................................................................................................................... 139 Ethernet OAM Settings .......................................................................................................................................................... 140 Ethernet OAM Configuration Settings .................................................................................................................................... 141 L3 Features ................................................................................................................................. 142 IPv4 Interface Settings .............................................................................................................................................. 142 IPv4 Default Route Settings...................................................................................................................................... 143 Gratuitous ARP ......................................................................................................................................................... 144 Gratuitous ARP Global Settings ............................................................................................................................................. 144 Gratuitous ARP Settings ........................................................................................................................................................ 145 ARP Spoofing Prevention Settings ........................................................................................................................... 145 DNS Relay ................................................................................................................................................................ 146 DNS Relay Global Settings .................................................................................................................................................... 146 DNS Relay Static Settings ..................................................................................................................................................... 147 DHCP Server ............................................................................................................................................................ 147

vi DHCP Server Global Settings ................................................................................................................................................ 148 DHCP Server Excluded Address Settings ............................................................................................................................. 149 DHCP Server Pool Settings ................................................................................................................................................... 149 DHCP Server Manual Binding ................................................................................................................................................ 151 Policy Route Settings ................................................................................................................................................ 152 QoS ............................................................................................................................................. 154 Advantages of QoS ................................................................................................................................................................ 154 Understanding QoS ............................................................................................................................................................... 155 HOL Blocking Pevention ........................................................................................................................................... 156 Bandwidth Control .................................................................................................................................................... 157 Traffic Control ........................................................................................................................................................... 157 802.1p Default Priority .............................................................................................................................................. 160 802.1p User Priority .................................................................................................................................................. 161 QoS Scheduling Mechanism .................................................................................................................................... 162 QoS Scheduling ........................................................................................................................................................ 163 CoS Bandwidth Control Settings .............................................................................................................................. 164 SRED ........................................................................................................................................................................ 165 SRED Settings ....................................................................................................................................................................... 165 SRED Drop Counter .............................................................................................................................................................. 166 DSCP Trust Settings .............................................................................................................................................................. 167 DSCP Map Settings ............................................................................................................................................................... 168 802.1p Map Settings .............................................................................................................................................................. 170 Security ....................................................................................................................................... 171 Safeguard Engine ..................................................................................................................................................... 171 Trusted Host ............................................................................................................................................................. 173 IP-MAC-Port Binding ................................................................................................................................................ 173 IMP Binding Global Settings .................................................................................................................................................. 174 IMP Binding Port Settings ...................................................................................................................................................... 175 IMP Binding Entry Settings .................................................................................................................................................... 176 DHCP Snooping Entries ........................................................................................................................................................ 177 MAC Block List ....................................................................................................................................................................... 177 Port Security ............................................................................................................................................................. 177 Port Security Settings ............................................................................................................................................................ 177 Port Security FDB Entries ...................................................................................................................................................... 179 DHCP Server Screening Settings ............................................................................................................................. 179 DHCP Screening Port Settings .............................................................................................................................................. 180 DHCP Offer Filtering .............................................................................................................................................................. 181 802.1X ....................................................................................................................................................................... 181 802.1X Force Disconnect ....................................................................................................................................................... 186 802.1X Global Settings .......................................................................................................................................................... 186 802.1X Settings ...................................................................................................................................................................... 188 802.1X User ........................................................................................................................................................................... 189 Authentication RADIUS Server .............................................................................................................................................. 190

vii RADIUS Attributes Assignment .............................................................................................................................................. 191 Guest VLAN Configuration ..................................................................................................................................................... 193 Guest VLAN ........................................................................................................................................................................... 194 SSL Settings ............................................................................................................................................................. 194 Download Certificate .............................................................................................................................................................. 195 Ciphersuite ............................................................................................................................................................................. 195 SSH ........................................................................................................................................................................... 197 SSH Settings .......................................................................................................................................................................... 197 SSH Authmode and Algorithm Settings ................................................................................................................................. 198 SSH User Authentication Lists ............................................................................................................................................... 199 Access Authentication Control .................................................................................................................................. 201 Authentication Policy Settings ................................................................................................................................................ 202 Application Authentication Settings ........................................................................................................................................ 202 Authentication Server Group .................................................................................................................................................. 203 Authentication Server ............................................................................................................................................................. 204 Login Method Lists ................................................................................................................................................................. 205 Enable Method Lists .............................................................................................................................................................. 206 Local Enable Password Settings ............................................................................................................................................ 207 RADIUS Accounting Services ................................................................................................................................................ 208 MAC-based Access Control...................................................................................................................................... 209 MAC-based Access Control Settings ..................................................................................................................................... 209 MAC-based Access Control Local Settings............................................................................................................................ 211 Web Authentication ................................................................................................................................................... 212 Web-based Access Control Settings ...................................................................................................................................... 214 Web-based Access Control User Settings ............................................................................................................................. 215 Web-based Access Control Port Settings .............................................................................................................................. 216 JWAC (Japanese Web-based Access Control) ........................................................................................................ 217 JWAC Global Settings ........................................................................................................................................................... 217 JWAC Port Settings ............................................................................................................................................................... 219 JWAC User Settings .............................................................................................................................................................. 220 JWAC Customize Page Language ......................................................................................................................................... 220 JWAC Customize Page ......................................................................................................................................................... 221 NetBIOS Filtering Settings ........................................................................................................................................ 221 Multiple Authentication .............................................................................................................................................. 222 Multiple Authentication Settings ............................................................................................................................................. 224 Guest VLAN ........................................................................................................................................................................... 225 ACL ............................................................................................................................................. 226 ACL Configuration Wizard ........................................................................................................................................ 226 Access Profile List .................................................................................................................................................... 228 CPU Interface Filtering ............................................................................................................................................. 244 CPU Access Profile List ............................................................................................................................................ 245 ACL Finder ................................................................................................................................................................ 256 ACL Flow Meter ........................................................................................................................................................ 256

viii Monitoring .................................................................................................................................. 259 Device Status ............................................................................................................................................................ 259 Cable Diagnostics ..................................................................................................................................................... 260 CPU Utilization .......................................................................................................................................................... 261 Port Utilization ........................................................................................................................................................... 262 Packet Size ............................................................................................................................................................... 263 Packets ..................................................................................................................................................................... 265 Received (RX) ........................................................................................................................................................................ 265 UMB_cast (RX) ...................................................................................................................................................................... 267 Transmitted (TX) .................................................................................................................................................................... 268 Errors ........................................................................................................................................................................ 270 Received (RX) ........................................................................................................................................................................ 270 Transmitted (TX) .................................................................................................................................................................... 272 Port Access Control .................................................................................................................................................. 273 RADIUS Authentication .......................................................................................................................................................... 274 RADIUS Account Client ......................................................................................................................................................... 275 Authenticator State ................................................................................................................................................................ 277 Authenticator Statistics .......................................................................................................................................................... 277 Authenticator Session Statistics ............................................................................................................................................. 279 Authenticator Diagnostics ...................................................................................................................................................... 280 Browse ARP Table ................................................................................................................................................... 282 Browse Route Table ................................................................................................................................................. 282 Browse VLAN ........................................................................................................................................................... 282 Show VLAN Ports ..................................................................................................................................................... 283 Browse Voice VLAN Device ..................................................................................................................................... 283 Browse DHCP Server Dynamic Binding ................................................................................................................... 283 Browse DHCP Conflict IP ......................................................................................................................................... 284 Browse Session Table .............................................................................................................................................. 284 MLD Snooping .......................................................................................................................................................... 284 Browse MLD Router Port ....................................................................................................................................................... 284 MLD Snooping Group ............................................................................................................................................................ 285 MLD Snooping Forwarding .................................................................................................................................................... 285 Browse MLD Snooping Counter ............................................................................................................................................. 286 IGMP Snooping ........................................................................................................................................................ 286 Browse IGMP Router Port...................................................................................................................................................... 286 IGMP Snooping Group ........................................................................................................................................................... 287 IGMP Snooping Forwarding ................................................................................................................................................... 288 Browse IGMP Snooping Counter ........................................................................................................................................... 288 Ethernet OAM ........................................................................................................................................................... 288 Browse Ethernet OAM Event Log .......................................................................................................................................... 288 Browse Ethernet OAM Statistics ............................................................................................................................................ 289 JWAC Authentication State ...................................................................................................................................... 290 MBA Authentication State ......................................................................................................................................... 290

ix WAC Authentication State ........................................................................................................................................ 290 ARP & FDB Table ..................................................................................................................................................... 291 MAC Address Table .................................................................................................................................................. 292 System Log ............................................................................................................................................................... 293 Save Services and Tools ........................................................................................................... 294 Save Configuration ID 1 ............................................................................................................................................ 294 Save Configuration ID 2 ............................................................................................................................................ 295 Save Log ................................................................................................................................................................... 295 Save All ..................................................................................................................................................................... 295 Configuration File Backup & Restore ....................................................................................................................... 296 Upload Log File ......................................................................................................................................................... 296 Reset ......................................................................................................................................................................... 296 Download Firmware .................................................................................................................................................. 297 Reboot System ......................................................................................................................................................... 297 Mitigating ARP Spoofing Attacks Using Packet Content ACL ............................................... 298 System Log and Trap List ......................................................................................................... 306 Glossary...................................................................................................................................... 318 Password Recovery Procedure ................................................................................................ 321

x Intended Readers The DES-3528/DES-3552 Series Manual contains information for setup and management of the Switch. This manual is intended for network managers familiar with network management concepts and terminology. Typographical Conventions Convention Description [ ] In a command line, square brackets indicate an optional entry. For example: [copy filename] means that optionally you can type copy followed by the name of the file. Do not type the brackets. Bold font Indicates a button, a toolbar icon, menu, or menu item. For example: Open the File menu and choose Cancel. Used for emphasis. May also indicate system messages or prompts appearing on your screen. For example: You have mail. Bold font is also used to represent filenames, program names and commands. For example: use the copy command. Boldface T ypewriter Font Indicates commands and responses to prompts that must be typed exactly as printed in the manual. Initial capital letter Indicates a window name. Names of keys on the keyboard have initial capitals. For example: Click Enter. Italics Indicates a window name or a field. Also can indicate a variables or parameter that is replaced with an appropriate word or string. For example: type filename means that you should type the actual filename instead of the word shown in italic. Menu N ame > Menu Option Menu Name > Menu Option Indicates the menu structure. Device > Port > Port Properties means the Port Properties menu option under the Port menu option that is located under the Device menu. Notes, Notices, and Cautions A NOTE indicates important information that helps you make better use of your device. A NOTICE indicates either potential damage to hardware or loss of data and tells you how to avoid the problem. A CAUTION indicates a potential for property damage, personal injury, or death.

11 Section 1 Web-based Switch Configuration Introduction Login to Web manager Web-Based User Interface Web Pages Introduction All software functions of the Switch can be managed, configured and monitored via the embedded web-based (HTML) interface. The Switch can be managed from remote stations anywhere on the network through a standard browser such as Firefox, Safari, or Microsoft Internet Explorer. The browser acts as a universal access tool and can communicate directly with the Switch using the HTTP protocol. The Web-based management module and the Console program (and Telnet) are different ways to access the same internal switching software and configure it. Thus, all settings encountered in web-based management are the same as those found in the console program. Login to Web Manager To begin managing the Switch, simply run the browser you have installed on your computer and point it to the IP address you have defined for the device. The URL in the address bar should read something like: http://123.123.123.123, where the numbers 123 represent the IP address of the Switch. NOTE: The Factory default IP address for the Switch is 10.90.90.90. This opens the management module's user authentication window, as seen below. Figure 1 - 1 Enter Network Password dialog Enter “admin” in both the User Name and Password fields and click OK. This will open the Web-based user interface. The Switch management features available in the web-based manager are explained below.

12 Web-based User Interface The user interface provides access to various Switch configuration and management windows, allows you to view performance statistics, and permits you to graphically monitor the system status. Areas of the User Interface The figure below shows the user interface. The user interface is divided into three distinct areas as described in the table. Figure 1 - 2 Main Web-Manager page Area Function Area 1 Select the folder or window to be displayed. The folder icons can be opened to display the hyperlinked window buttons and subfolders contained within them. Click the D-Link logo to go to the D-Link website. Area 2 Presents a graphical near real-time image of the front panel of the Switch. This area displays the Switch's ports and expansion modules, showing port activity, duplex mode, or flow control, depending on the specified mode. Various areas of the graphic can be selected for performing management functions, including port configuration. Area 2 Area 1 Area 3

13 Area 3 Presents switch information based on your selection and the entry of configuration data. NOTICE: Any changes made to the Switch configuration during the current session must be saved in the Save Changes web menu (explained below) or use the command line interface (CLI) command save. Web Pages When you connect to the management mode of the Switch with a web browser, a login window is displayed. Enter a user name and password to access the Switch's management mode. Below is a list and description of the main folders available in the web interface: Configuration – A detailed discussion about configuring some of the basic functions of the Switch, including accessing the System Information, Serial Port Settings, IP Address, Port Configuration, Static ARP Settings, User Accounts, System Log Configuration, System Severity Settings, DHCP Relay, DHCP Local Relay Settings, DHCP Auto Configuration Settings, MAC Address Aging Time, Web Settings, Telnet Settings, Password Encryption, Clipaging Settings, Firmware Information, Dual Configuration Settings, PPPoE Circuit ID Insertion Settings, Ping Test, SNTP Settings, MAC Notification Settings, PoE, SNMP Settings, sFlow, Stacking Mode Settings, Time Range Settings, and Single IP Management. L2 Features – A discussion of the Layer 2 features on the Switch, including Jumbo Frame, 802.1Q VLAN, Voice VLAN, Subenet VLAN, QinQ, 802.1v Protocol VLAN, RSPAN Settings, GVRP Settings, GVRP Timer Settings, Asymmetric VLAN Settings, MAC-based VLAN Settings, PVID Auto Assign Settings, VLAN Trunk Settings, Port Trunking, LACP Port Settings, Traffic Segmentation, IGMP Snooping, MLD Snooping, Port Mirror, Loopback Detection Settings, BPDU Attack Protection Settings, Spanning Tree, Forwarding & Filtering, LLDP, CFM, and Ethernet OAM. L3 Features – A discussion of the Layer 3 features on the Switch, including Ipv4 Interface Settings, Ipv4 Default Route Settings, Gratuitous ARP, ARP Spoofing Prevention Settings, DNS Relay, DHCP Server and Policy Route Settings. QoS – Features information on Switch QoS functions, including HOL Blocking Prevention, Bandwidth Control, Traffic Control, 802.1p Default Priority, 802.1p User Priority, QoS Scheduling Mechanism, QoS Scheduling, CoS Bandwidth Control Settings and SRED. Security – Features information on Switch security functions, including Safeguard Engine, Trusted Host, IP-MAC- Port Binding, Port Security, DHCP Server Screening, 802.1X, SSL Settings, SSH, Access Authentication Control, MAC-based Access Control, Web Authentication, JWAC, NetBIOS Filtering Settings, and Multiple Authentication. ACL – Discussion on the ACL functions of the Switch, including ACL Configuration Wizard, Access Profile List, CPU Access Profile List, ACL Finder, and ACL Flow Meter. Monitoring – Features information about the monitoring functions on the Switch including, Device Status, Cable Diagnostics, CPU Utilization, Port Utilization, Packet Size, Packets, Errors, Port Access Control, Browse ARP Table, Browse Route Table, Browse VLAN, Show VLAN Ports, Browse Voice VLAN Device, Browse DHCP Server Dynamic Binding, Browse DHCP Conflict IP, Browse Session Table, MLD Snooping, IGMP Snooping, Ethernet OAM, JWAC Authentication State, MBA Authentication State, WAC Authentication State, ARP & FDB Table, MAC Address Table, and System Log. NOTE: Be sure to configure the user name and password in the User Accounts window before connecting the Switch to the greater network.

14 Section 2 Configuration Device Information System Information Serial Port Settings IP Address Port Configuration Static ARP Settings User Accounts System Log Configuration System Severity Settings DHCP Relay DHCP Local Relay Settings DHCP Auto Configuration Settings MAC Address Aging Time Web Settings Telnet Settings Password Encryption Clipaging Settings Firmware Information Dual Configuration Settings PPPoE Circuit ID Insertion Settings Ping Test SNTP Settings MAC Notification Settings PoE SNMP Settings sFlow Stacking Mode Settings Time Range Settings Single IP Management

15 Device Information This window contains the main settings for all major functions on the Switch and appears automatically when you log on. To return to the Device I nformation window, click the DES-3528 W eb M anagement T ool folder. The Device Information window shows the Switch’s MAC Address (assigned by the factory and unchangeable), the Boot PROM Version, Firmware V ersion, Hardware Ve rsion and Serial N umber as well as other information about different settings on the Switch. This information is helpful to keep track of PROM and firmware updates and to obtain the Switch's MAC address for entry into another network device's address table, if necessary. In addition, this window displays the status of functions on the Switch to quickly assess their current global status. Some functions are hyper- linked to their configuration window for easy access from the Device Information window. Figure 2 - 1 Device Information window System Information This window contains the System Information details. The user may enter a System Name, System Location and System C ontact to aid in defining the Switch, to the user's preference. This window displays the MAC Ad dress, Firmware Version and Hardware Version. Click Configuration > System Information to display the following window: Figure 2 - 2 System Information window The fields that can be configured are described below: Parameter Description System Name Enter a system name for the Switch, if so desired. This name will identify it in the Switch network. System Location Enter the location of the Switch, if so desired. System Contact Enter a contact name for the Switch, if so desired.

16 Click Apply to implement changes made. Serial Port Settings The following window contains information about the Serial Port Settings to view this window click Configuration > Serial Port Settings. Figure 2 - 3 Serial Port Settings window Parameter Description Baud Rate This field specifies the baud rate for the serial port on the Switch. There are four possible baud rates to choose from, 9600, 19200, 38400 and 115200. For a connection to the Switch using the CLI interface, the baud rate must be set to 115200, which is the default setting. Auto Logout Select the logout time used for the console interface. This automatically logs the user out after an idle period of time, as defined. Choose from the following options: 2 Minutes, 5 Minutes, 10 Minutes, 15 Minutes or Never. The default setting is 10 minutes. Click Apply to implement changes made. IP Address The IP address may initially be set using the console interface prior to connecting to it through the Ethernet. If the Switch IP address has not yet been changed, read the introduction of the DES-3528/DES-3552 Series CLI Manual for more information. Click Configuration > IP Address to display the following window: Figure 2 - 4 IP Address Settings window To manually assign the Switch's IP address, subnet mask, and default gateway address: 1. Select Static at the top of the screen. 2. Enter the appropriate IP Address and Subnet Mask. 3. If you want to access the Switch from a different subnet from the one it is installed on, enter the IP address of the Gateway. If you will manage the Switch from the subnet on which it is installed, you can leave the default address (0.0.0.0) in this field. 4. If no VLANs have been previously configured on the Switch, you can use the default VLAN Name. The default VLAN contains all of the Switch ports as members. If VLANs have been previously configured on the Switch, NOTE: If a user configures the serial port’s baud rate, the baud rate will take effect and save immediately. Baud rate settings will not change even if the user resets or reboots the Switch. The Baud rate will only change when the user configures it again. The serial port’s baud rate setting is not stored in the Switch’s configuration file. Resetting the Switch will not restore the baud rate to the default setting.

17 you will need to enter the Management VLAN Name of the VLAN that contains the port connected to the management station that will access the Switch. The Switch will allow management access from stations with the same VID listed here. NOTE: The Switch's factory default IP address is 10.90.90.90 with a subnet mask of 255.0.0.0 and a default gateway of 0.0.0.0. To use the BOOTP or DHCP protocols to assign the Switch an IP address, subnet mask, and default gateway address: Select BOOTP or DHCP, this will determine how the Switch will be assigned an IP address. The IP Address Settings options are: Parameter Description BOOTP The Switch will send out a BOOTP broadcast request when it is powered up. The BOOTP protocol allows IP addresses, network masks, and default gateways to be assigned by a central BOOTP server. If this option is set, the Switch will first look for a BOOTP server to provide it with this information before using the default or previously entered settings. DHCP The Switch will send out a DHCP broadcast request when it is powered up. The DHCP protocol allows IP addresses, network masks, and default gateways to be assigned by a DHCP server. If this option is set, the Switch will first look for a DHCP server to provide it with this information before using the default or previously entered settings. Static Allows the entry of an IP address, Subnet Mask, and a Default Gateway for the Switch. These fields should be of the form xxx.xxx.xxx.xxx, where each xxx is a number (represented in decimal form) between 0 and 255. This address should be a unique address on the network assigned for use by the network administrator. Subnet Mask A Bitmask that determines the extent of the subnet that the Switch is on. Should be of the form xxx.xxx.xxx.xxx, where each xxx is a number (represented in decimal) between 0 and 255. The value should be 255.0.0.0 for a Class A network, 255.255.0.0 for a Class B network, and 255.255.255.0 for a Class C network, but custom subnet masks are allowed. Gateway IP address that determines where packets with a destination address outside the current subnet should be sent. This is usually the address of a router or a host acting as an IP gateway. If your network is not part of an intranet, or you do not want the Switch to be accessible outside your local network, you can leave this field unchanged. Management VLAN Name This allows the entry of a VLAN Name from which a management station will be allowed to manage the Switch using TCP/IP (in-band via web manager or Telnet). Management stations that are on VLANs other than the one entered here will not be able to manage the Switch in-band unless their IP addresses are entered in the Security IP Management window. If VLANs have not yet been configured for the Switch, the default VLAN contains all of the Switch's ports. There are no entries in the Security IP Management table, by default, so any management station that can connect to the Switch can access the Switch until a management VLAN is specified or Management Station IP Addresses are assigned. Click Apply to allow changes to take effect.

19 Port Configuration This section contains information for configuring various attributes and properties for individual physical ports, including port speed and flow control. Port Settings Click Configuration > Port Configuration > Port Settings to display the following window: To configure switch ports: Choose the port or sequential range of ports using the From Port and To Port pull-down menus. Use the remaining pull-down menus to configure the parameters described below: Figure 2 - 5 Port Settings window The following parameters can be configured: Parameter Description From Port / To Port Use the pull-down menus to select the port or range of ports to be configured. State Toggle this field to either enable or disable a given port or group of ports. Speed/Duplex Toggle the Speed/Duplex field to either select the speed and duplex/half-duplex state of the port. Auto denotes auto-negotiation between 10 and 100 Mbps devices, in full- or half-duplex. The Auto setting allows the port to automatically determine the fastest settings the device the port is connected to can handle, and then to use those settings. The other options are Auto, 10M/Half, 10M/Full, 100M/Half and 100M/Full, 1000M/Full_M, 1000M/Full_S and 1000M/Full. There is no automatic adjustment of port settings with any option other than Auto. The Switch allows the user to configure two types of gigabit connections; 1000M/Full_M and 1000M/Full_S. Gigabit connections only support full duplex connections and take on certain characteristics that are different from the other choices listed. The 1000M/Full_M (master) and 1000M/Full_S (slave) parameters refer to connections running

20 a 1000BASE-T cable for connection between the Switch port and other device capable of a gigabit connection. The master setting (1000M/Full_M) will allow the port to advertise capabilities related to duplex, speed and physical layer type. The master setting will also determine the master and slave relationship between the two connected physical layers. This relationship is necessary for establishing the timing control between the two physical layers. The timing control is set on a master physical layer by a local source. The slave setting (1000M/Full_S) uses loop timing, where the timing comes form a data stream received from the master. If one connection is set for 1000M/Full_M, the other side of the connection must be set for 1000M/Full_S. Any other configuration will result in a link down status for both ports. Flow Control Displays the flow control scheme used for the various port configurations. Ports configured for full-duplex use 802.3x flow control, half-duplex ports use backpressure flow control, and Auto ports use an automatic selection of the two. The default is Disabled. Address Learning When Enabled, destination and source MAC addresses are automatically listed in the forwarding table. The default setting is Enabled. MDIX This can be specified as Auto, Normal, or Cross. In Normal state, the port is in MDIX mode and can be connected to PC NIC using a straight cable. If it is in Cross state, the port is in MDI mode, and can be connected to a port (in MDIX mode) on another switch through a straight cable. Medium Type This applies only to the Combo ports. If configuring the Combo ports this defines the type of transport medium used. SFP ports should be set at Fiber and the Combo 1000BASE-T ports should be set at Copper. Click Apply to implement the new settings on the Switch.

21 Port Description The Switch supports a port description feature where the user may name various ports on the Switch. To assign names to various ports, click Configuration > Port Configuration > Port Description to view the following window: Use the From Port and To Port pull-down menus to choose a port or range of ports to describe, and then enter a description of the port(s). Click Apply to set the descriptions in the Port Description Table. The Medium Type applies only to the Combo ports. If configuring the Combo ports this defines the type of tranport medium used. SFP ports should be nominated Fiber and the Combo 1000BASE-T ports should be nominated Copper. The result will be displayed in the appropriate switch port number slot (C for copper ports and F for fiber ports). Figure 2 - 6 Port Description window The following parameters can be configured: Parameter Description From Port / T o Port Use the pull-down menus to select the port or range of ports to be configured. Medium Type This only applies to the Combo ports. If configuring the Combo ports, this defines the type of transport medium used. SFP ports should be set at Fiber and the Combo 1000BASE-T ports should be set at Copper. Description The Description of the the ports. Click Apply to implement the new settings on the Switch. Port Error Disabled The following window will display the information about ports that have had their connection status disabled, for reasons such as STP loopback detection or link down status. To view this window, click Configuration > Po rt Configuration > Port Error Disabled:

22 Figure 2 - 7 Port Error Disabled window The following parameters are displayed: Parameter Description Port Displays the port that has been error disabled. Port State Describes the current running state of the port, whether Enabled or Disabled. Connection Status This field will read the uplink status of the individual ports, whether Enabled or Disabled. Reason Describes the reason why the port has been error-disabled, such as a STP loopback occurrence. Static ARP Settings The Address Resolution Protocol (ARP) is a TCP/IP protocol that converts IP addresses into physical addresses. This table allows network managers to view, define, modify and delete ARP information for specific devices. Static entries can be defined in the ARP Table. When static entries are defined, a permanent entry is entered and is used to translate IP address to MAC addresses. To view this window, click Configuration > Static ARP Settings: Figure 2 - 8 Static ARP Settings window The following fields can be set: Parameter Description ARP Aging Time (0 or 30-3932100) The user may globally set the maximum amount of time, in seconds, that an Address Resolution Protocol (ARP) entry can remain in the Switch’s ARP table, without being accessed, before it is dropped from the table. The value may be set in the range of 0 or 30- 3932100 seconds with a default setting of 1200 seconds. IP Address The IP address of the ARP entry. MAC Address The MAC address of the ARP entry. After entering the IP Address and MAC Address of the Static ARP entry, click Apply to implement the new entry. To completely clear the Static ARP Settings, click the Delete All button. To modify a static ARP entry, click the corresponding Edit button in the table. To delete a static ARP entry, click the corresponding Delete button in the table.

23 NOTE: The Switch supports up to 255 static ARP entries. User Accounts Use the User Account M anagement window to control user privileges, create new users and view existing User Accounts. To view this window, click Configuration > User Accounts: Figure 2 - 9 User Accounts window The following fields can be set: Parameter Description User Name The name of the user, an alphanumeric string of up to 15 characters. Access Right There are three levels of user privileges, Admin, O perator and User. Some menu selections available to users with Admin privileges may not be available to those with User or Operator level privileges. There are 3 levels of security offered on the Switch, the Operator level privilege will allow users to configure and view configurations on the Switch, except for those involving security features, which are still left to the Admin level privilege. Operator level users can be authenticated through either the local authentication method of the Switch, or through the Access Authentication Control feature, discussed later in this document. Once the user has logged in to the Switch in the Operator level, certain security screens and windows will not be made available to view, or to configure. Only Admin level users have access to these features. (Table 2 - 1 below summarizes Admin, Operator and User level privileges) Password Enter a password for the new user. Confirm Password Retype the new password. To add a new user, enter the appropriate information and click Apply. To modify or delete an existing user, click on the Edit button for that user. NOTICE: In case of lost passwords or password corruption, please refer to the D-Link website and the White Paper entitled “Password Recovery Procedure”, which will guide you through the steps necessary to resolve this issue. Admin, Operator and User Privileges Recently added to the levels of security offered on the Switch, the Operator level privilege will allow users to configure and view configurations on the Switch, except for those involving security features, which are still left to the Admin privilege. Operator users can be authenticated through either the local authentication method of the Switch, or through

24 the Access Authentication Control feature, discussed later in this document. Once the user has logged in to the Switch in the Operator level, certain security screens and windows will not be made available to view, or to configure. Only Admin level users have access to these features. There are three levels of user privileges, Admin, Operator and User. Some menu selections available to users with Admin privileges may not be available to those with User or Operator privileges. The following table summarizes the Admin, Operator and User privileges: Management Admin Operator User Configuration Yes Yes Read-only Network Monitoring Yes Yes Read-only Community Strings and Trap Stations Yes Yes Read-only Update Firmware and Configuration Files Yes No No System Utilities Yes Yes No Factory Reset Yes No No User Account Management Add/Update/Delete User Accounts Yes No No View User Accounts Yes No No Table 2 - 1 Admin, Operator and User Privileges System Log Configuration This section contains information for configuring various attributes and properties for System Log Configurations, including System Log Settings and System Log Host. System Log Settings This window allows the user to enable or disable the System Log and specify the System Log Save Mode Settings. To configure the system log settings click Configuration > System Log Configuration > System Log Settings Figure 2 - 10 System Log Settings window The following parameters can be set: Parameter Description Save Mode Use this drop-down menu to choose the method that will trigger a log entry. You can choose between On Demand, Time Interval, and Log Trigger. Minutes (1-65535) Enter a time interval, in seconds, for which you would like a log entry to be made. To add a new entry, enter the appropriate information and click Apply. To save the current Log Settings, click Save Log.

25 System Log Server The Switch can send Syslog messages to up to four designated servers using the System Log Server. To configure the system log settings click Configuration > System Log Configuration > System Log Server Figure 2 - 11 System Log Server window The following parameters can be set: Parameter Description Server ID Syslog server settings index (1-4). Server IP Address The IP address of the Syslog server. UDP Port (514 or 6000-65535) Type the UDP port number used for sending Syslog messages. The default is 514. Severity This drop-down menu allows you to select the level of messages that will be sent. The options are Warning, Informational, and All. Facility Some of the operating system daemons and processes have been assigned Facility values. Processes and daemons that have not been explicitly assigned a Facility may use any of the "local use" facilities or they may use the "user-level" Facility. Those Facilities that have been designated are shown in the following: Bold font indicates the facility values that the Switch is currently employing. Numerical Facility Code Numerical Facility Code 0 1 2 3 4 5 7 8 9 10 11 kernel messages user-level messages mail system system daemons security/authorization messages messages generated internally by syslog line printer subsystem network news subsystem UUCP subsystem clock daemon security/authorization messages FTP daemon 12 13 14 15 16 17 18 19 20 21 22 23 NTP subsystem log audit log alert clock daemon local use 0 (local0) local use 1 (local1) local use 2 (local2) local use 3 (local3) local use 4 (local4) local use 5 (local5) local use 6 (local6) local use 7 (local7) Status Choose Enabled or Disabled to activate or deactivate. To add a new entry, enter the appropriate information and click Apply.

26 System Severity Settings The Switch can be configured to allow alerts be logged or sent as a trap to an SNMP agent or both. The level at which the alert triggers either a log entry or a trap message can be set as well. Use the System Severity Settings menu to set the criteria for alerts. The current settings are displayed below the Settings menu. To view this window click Configuration > System Severity Settings Figure 2 - 12 System Severity Settings Use the drop-down menus to configure the parameters described below. Parameter Description System Severity Choose how the alerts are used from the drop-down menu. Select Log to send the alert of the Severity Type configured to the Switch’s log for analysis. Choose Trap to send it to an SNMP agent for analysis. Select All to send the chosen alert type to an SNMP agent and the Switch’s log for analysis. Severity Level Choose what level of alert will trigger sending the log entry or trap message as defined by the Severity Name. Select Critical to send only critical events to the Switch’s log or SNMP agent. Choose Warning to send critical and warning events to the Switch’s log or SNMP agent. Select Information to send informational, warning and critical events to the Switch’s log or SNMP agent. Click Apply to implement the new System Severity Settings.

27 DHCP Relay The relay hops count limit allows the maximum number of hops (routers) that the DHCP messages can be relayed through to be set. If a packet’s hop count is equal to or more than the hop count limit, the packet is dropped. The range is between 1 and 16 hops, with a default value of 4. The relay time threshold sets the minimum time (in seconds) that the Switch will wait before forwarding a BOOTREQUEST packet. If the value in the seconds field of the packet is less than the relay time threshold, the packet will be dropped. The range is between 0 and 65,535 seconds, with a default value of 0 seconds. DHCP Relay Global Settings To enable and configure DHCP Relay Global Settings on the Switch, click Configuration > DHCP Relay > DHCP Relay Global Settings Figure 2 - 13 DHCP Relay Global Settings window The following fields can be set: Parameter Description DHCP Relay State This field can be toggled between Enabled and Disabled using the pull-down menu. It is used to enable or disable the DHCP Relay service on the Switch. The default is Disabled DHCP Relay Hops Count Limit (1-16) This field allows an entry between 1 and 16 to define the maximum number of router hops DHCP messages can be forwarded across. The default hop count is 4. DHCP Relay Time Threshold (0-65535) Allows an entry between 0 and 65535 seconds, and defines the maximum time limit for routing a DHCP packet. If a value of 0 is entered, the Switch will not process the value in the seconds field of the BOOTP or DHCP packet. If a non-zero value is entered, the Switch will use that value, along with the hop count to determine whether to forward a given BOOTP or DHCP packet. DHCP Relay Option 82 State This field can be toggled between Enabled and Disabled using the pull-down menu. It is used to enable or disable the DHCP Agent Information Option 82 on the Switch. The default is Disabled. Enabled – When this field is toggled to Enabled the relay agent will insert and remove DHCP relay information (option 82 field) in messages between DHCP servers and clients. When the relay agent receives the DHCP request, it adds the option 82 information, and the IP address of the relay agent (if the relay agent is configured), to the packet. Once the option 82 information has been added to the packet it is sent on to the DHCP server. When the DHCP server receives the packet, if the server is capable of option 82, it can implement policies like restricting the number of IP addresses that can be assigned to a single remote ID or circuit ID. Then the DHCP server echoes the option 82 field in the DHCP reply. The DHCP server unicasts the reply to the back to the relay agent if the request was relayed to the server by the relay agent. The switch verifies that it originally inserted the option 82 data. Finally, the relay agent removes the option 82 field and forwards the packet to the switch port that connects to the DHCP client that sent the DHCP request. Disabled - If the field is toggled to Disabled the relay agent will not insert and remove DHCP relay information (option 82 field) in messages between DHCP servers and clients, and the

28 check and policy settings will have no effect. DHCP Relay Agent Information Option 82 Check This field can be toggled between Enabled and Disabled using the pull-down menu. It is used to enable or disable the Switches ability to check the validity of the packet’s option 82 field. Enabled – When the field is toggled to Enable, the relay agent will check the validity of the packet’s option 82 field. If the switch receives a packet that contains the option-82 field from a DHCP client, the switch drops the packet because it is invalid. In packets received from DHCP servers, the relay agent will drop invalid messages. Disabled - When the field is toggled to Disabled, the relay agent will not check the validity of the packet’s option 82 field. DHCP Relay Agent Information Option 82 Policy This field can be toggled between Replace, Drop, and Keep by using the pull-down menu. It is used to set the Switches policy for handling packets when the DHCP A gent Information Option 82 Check is set to Disabled. The default is Replace. Replace - The option 82 field will be replaced if the option 82 field already exists in the packet received from the DHCP client. Drop - The packet will be dropped if the option 82 field already exists in the packet received from the DHCP client. Keep -The option 82 field will be retained if the option 82 field already exists in the packet received from the DHCP client. DHCP Relay Agent Information Option 82 Remote ID This field is for you to enter the remote ID. Tick Default to use the Switch’s system MAC address as the remote ID. DHCP Relay Option 60 State This function enables or disables the DHCP option 60 state. When option 60 is enabled, if the packet does not have option 60, then the relay servers cannot be determined based on option 60. As a result, the relay servers will be determined based on either option 61 or per IPIF configured servers. If the relay servers are determined based on option 60, then the IPIF configured servers will be ignored. If the relay servers are not determined by option 60 then the IPIF configured servers will be used to determine the relay servers. DHCP Relay Option 61 State This function enables or disables the DHCP option 61 state. When option 61 is enabled, if the packet does not have option 61, then the relay servers cannot be determined based on option 61. If the relay servers are determined based on option 61, then the IPIF configured servers will be ignored. If the relay servers are not determined either by option 60 or option 61, then IPIF configured servers will be used to determine the relay servers. Click Apply to implement any changes that have been made. NOTE: If the Switch receives a packet that contains the option-82 field from a DHCP client and the information-checking feature is enabled, the switch drops the packet because it is invalid. However, in some instances, you might configure a client with the option-82 field. In this situation, you should disable the information-check feature so that the switch does not remove the option-82 field from the packet. You can configure the action that the switch takes when it receives a packet with existing option-82 information by configuring the DHCP Agent Information Option 82 Policy. The Implementation of DHCP Information Option 82 on the Switch The config dhcp_relay o ption_82 command configures the DHCP relay agent information option 82 setting of the switch. The formats for the circuit ID sub-option and the remote ID sub-option are as follows:

29 NOTE: For the circuit ID sub-option of a standalone switch, the module field is always zero. Circuit ID sub-option format: 1. 2. 3. 4. 5. 6. 7. 1 6 0 4 VLAN Module Port 1 byte 1 byte 1 byte 1 byte 2 bytes 1 byte 1 byte a. Sub-option type b. Length c. Circuit ID type d. Length e. VLAN: the incoming VLAN ID of DHCP client packet. f. Module: For a standalone switch, the Module is always 0; For a stackable switch, the Module is the Unit ID. g. Port: The incoming port number of DHCP client packet, port number starts from 1. Remote ID sub-option format: (default) 1. 2. 3. 4. 5. 2 8 0 6 MAC address 1 byte 1 byte 1 byte 1 byte 6 bytes 1. Sub-option type 2. Length 3. Remote ID type 4. Length 5. MAC address: The Switch’s system MAC address. Remote ID sub-option format:(for user-configured string) 1. 2. 3. 4. 5. 2 N+2 1 N ASCII Remote ID String (up to 127 characters) 1 byte 1 byte 1 byte 1 byte N bytes 1. Sub-option type 2. Length 3. Remote ID type 4. Length 5. User configured Remote-ID Figure 2 - 14 Circuit ID and Remote ID Sub-option Format

30 DHCP Relay Interface Settings This window allows the user to set up a server, by IP address, for relaying DHCP/ BOOTP information to the DHCP server. The user may enter a previously configured IP interface on the Switch that will be connected directly to the DHCP server using the following window. Properly configured settings will be displayed in the DHCP Relay Interface Table at the bottom of the following window. The user may add up to four server IP’s per IP interface on the Switch. To enable and configure DHCP Relay Global Settings on the Switch, click Configuration > DHCP Relay > DHCP Relay Interface Settings Figure 2 - 15 DHCP Relay Interface Settings and DHCP Relay Interface Table window The following parameters may be configured or viewed. Parameter Description Interface The IP interface on the Switch that will be connected directly to the Server. Server IP Enter the IP address of the DHCP server. Up to four server IPs can be configured per IP Interface DHCP Relay Option 60 Default Settings This window allows the user to configure the DHCP Relay Option 60 Default servers. When there is no matching server found for the packet based on option 60, the relay servers will be determined by the default relay server setting. To view this window, click Configuration > D HCP Relay > DHCP R elay O ption 6 0 D efault Settings as shown below: Figure 2 - 16 DHCP Relay Option 60 Default Settings window The following parameters may be configured. Parameter Description Relay IP Address Enter the specified IP address of the default relay server. Mode Use the pull down menu to choose either Relay or Drop. When drop is specified, the packet with no matching rules found will be dropped without further process. When relay is selected the packet will be relayed based on the relay rules. Click Add to add a new Relay IP Address entry. Click Apply to implement changes made. To remove any entries click the corresponding Delete button.

31 DHCP Relay Option 60 Settings This window is used to configure option 60 relay rules on the Switch. Different strings can be specified for the same relay server, and the same string can be specified with multiple relay servers. The system will relay the packet to all the matching servers. To view this window, click Configuration > DHCP Relay > DHCP Relay Option 60 Settings as shown below: Figure 2 - 17 DHCP Relay Option 60 Settings window The following parameters may be configured. Parameter Description String Enter the specified string, up to a maximum of 255 alphanumeric characters. Server IP Enter the relay server IP address. Match Type Use the drop down menu to select either Exact Match or Partial Match. Exact Match – The option 60 string in the packet must fully match the specified string. Partial Match – The option 60 string in the packet only needs to partially match the specified string. Click Add to add a new entry. To search for a particular entry enter the correct IP Address or String and click Find. To delete an entry select it and click Delete.

32 DHCP Relay Option 61 Default Settings This window is used to configure the DHCP Relay Option 61 Default Settings. These settings are used to determine the rule to process those packets that have no option 61 matching rules. To view this window, click Configuration > DHCP Relay > DHCP Relay Option 61 Default Settings as shown below: Figure 2 - 18 DHCP Relay Option 61 Default Settings window The following parameters may be configured. Parameter Description DHCP R elay O ption 61 Default Use the pull down menu to choose either Relay or Drop. When drop is specified, the packet with no matching rules found will be dropped without further process. When relay is selected the packet will be relayed based on the relay rules. Enter the IP Address of the default relay server. When there is no matching server found for the packet based on option 61, the relay servers will be determined by this default relay server setting. Click Apply to implement changes made. DHCP Relay Option 61 Settings This command is used to add a rule to the relay server based on option 61. The matching rule can be based on either the MAC address or the user-specified string. Only one relay server can be specified for a MAC-address or a string. Both option 60 and option 61 can be assigned to a specific DHCP server based on whether they match the configuration in the DHCP packet. If several relay servers are determined by option 60, and one relay server is determined by option 61, the final relay servers will be determined by both option 60 and 61. To view this window, click Configuration > DHCP Relay > DHCP Relay Option 61 Settings as shown below: Figure 2 - 19 DHCP Relay Option 61 Settings window The following parameters may be configured. Parameter Description Client ID Use the drop down menu to select the method of identification for the Client ID either MAC Address or String. The MAC Address will specify the hardware address of the client and the String will specify the client ID. Choose a method and enter the appropriate information into the box provided. Relay Rule Use the pull down menu to choose either Relay or Drop. When drop is specified, the packet with no matching rules found will be dropped without further process. When relay is selected the packet will be relayed based on the relay rules. Choose a method and enter the

33 appropriate information into the box provided. Click Add to create a new entry. To remove an entry, enter the appropriate Client ID information and click Delete. To delete all entries click Delete All. DHCP Local Relay Settings This function on the Switch allows to configure the DHCP Local relay for VLAN. To view this window, click Configuration > DHCP Local Relay Settings as shown below: Figure 2 - 20 DHCP Local Relay Settings window The following parameters may be configured. Parameter Description DHCP/BOOTP L ocal Relay Status It is used to enable or disable the DHCP Local Relay service on the Switch. The default is Disabled. VLAN Name Enter a name of the VLAN to be enabled by DHCP local relay. State This is used to enable or disable the DHCP local relay for the specified VLAN. DHCP Auto Configuration Settings The DHCP autoconfiguration function on the Switch will load a previously saved configuration file for current use. When DHCP autoconfiguration is Enabled on the Switch, the DHCP reply will contain a configuration file and path name. It will then request the file from the TFTP server specified in the reply. To view this window, click Configuration > DHCP Auto Configuration Settings as shown below: Figure 2 - 21 DHCP Auto Configuration Settings window When DHCP autoconfiguration is Enabled, the Switch becomes a DHCP client automatically after rebooting. The DHCP server must have the TFTP server IP address and configuration file name, and be configured to deliver this information in the data field of the DHCP reply packet. The TFTP server must be running and have the requested configuration file in its base directory when the request is received from the Switch. Consult the DHCP server and TFTP server software instructions for information on loading a configuration file. If the Switch is unable to complete the autoconfiguration process the previously saved local configuration file present in Switch memory will be loaded.

34 MAC Address Aging Time This table specifies the length of time a learned MAC Address will remain in the forwarding table without being accessed (that is, how long a learned MAC Address is allowed to remain idle). To change this, enter a value representing the MAC address age-out time in seconds. The MAC Address Aging Time can be set to any value between 10 and 1,000,000 seconds. The default setting is 300 seconds. To access this table, click Configuration > MAC Address Aging Time Figure 2 - 22 MAC Address Aging Time window Web Settings Web-based management is Enabled by default. If you choose to disable this by selecting Disabled, you will lose the ability to configure the system through the web interface as soon as these settings are applied. The TCP ports are numbered between 1 and 65535. The "well-known" TCP port for the web protocol is 80. To access this table, click Configuration > Web Settings Figure 2 - 23 Web Settings window Telnet Settings Telnet configuration is Enabled by default. If you do not want to allow configuration of the system through Telnet choose Disabled. The TCP ports are numbered between 1 and 65535. The "well-known" TCP port for the Telnet protocol is 23. To access this table, click Configuration > Telnet Settings Figure 2 - 24 Telnet Settings window Password Encryption Password Encryption Status can be Enabled or Disabled in this window, it is Disabled by default. Password encryption allows the user to encrypt a password for additional security. Select Enabled to change the password into encrypted form. When password encryption is disabled, the password will be in plain text form. However, if the user specifies the password in encrypted form, or if the password has been converted to encrypted form by the last Enable password encryption command, the password will still be in encrypted form and cannot be reverted back to plaintext form. To access this table, click Configuration > Password Encryption

35 Figure 2 - 25 Password Encryption window Clipaging Settings Clipaging Status can be Enabled or Disabled in this window, it is Enabled by default. Clipaging settings are used when issuing a command which causes the console screen to rapidly scroll through several pages. This command will cause the console to pause at the end of each page. To access this table, click Configuration > Clipaging Settings Figure 2 - 26 Clipaging Settings window Firmware Information The following screen allows the user to view information about current firmware images stored on the Switch. To access this table, click Configuration > Firmware Information Figure 2 - 27 Firmware Information window This window holds the following information: Parameter Description ID States the image ID number of the firmware in the Switch’s memory. The Switch can store two firmware images for use. Image ID 1 will be the default boot up firmware for the Switch unless otherwise configured by the user. Version States the firmware version. Size (Bytes) States the size of the corresponding firmware, in bytes. Update Time States the specific time the firmware version was downloaded to the Switch. From States the IP address of the origin of the firmware. There are five ways firmware may be

36 downloaded to the Switch. R – If the IP address has this letter attached, it denotes a firmware upgrade through the serial port RS232. T - If the IP address has this letter attached to it, it denotes a firmware upgrade through Telnet. S - If the IP address has this letter attached to it, it denotes a firmware upgrade through the Simple Network Management Protocol (SNMP). W - If the IP address has this letter attached to it, it denotes a firmware upgrade through the web-based management interface. SSH – If the IP address has these three letters attached, it denotes a firmware update through SSH. SIM – If the IP address has these letters attached, it denotes a firmware upgrade through the Single IP Management feature. User States the user who downloaded the firmware. This field may read “Anonymous” or “Unknown” for users that are unidentified. Dual Configuration Settings The following window is used to manage configuration information in the Switch. The DES-3528/DES-3552 Series has the capability to store two firmware images in its memory. To access this table, click Configuration > Dual Configuration Settings Figure 2 - 28 Dual Configuration Settings This window holds the following information: Parameter Description ID States the ID number of the configuration file located in the Switch’s memory. The Switch can store two configuration files for use. ID 1 will be the default boot up configuration file for the Switch unless otherwise configured by the user. Version Displays the firmware version that has been saved or uploaded in the Switch. Size (Bytes) Displays the size of the configuration file, in bytes. Update time Displays the time that the configuration file was updated to the Switch. From Displays the location from which the configuration file was uploaded. User Displays the name of the user (device) that updated this configuration file. Unknown users will be displayed as Anonymous.

37 Boot Click the Set Boot button under this heading to use this configuration file as the boot up firmware for the Switch. This will apply upon the next reboot of the Switch. Active Click the Active button to enable the configuration file settings. Delete Click the Delete button under this heading to delete this configuration file from the Switch’s memory. PPPoE Circuit ID Insertion Settings PPPoE Circuit ID Insertion can be Enabled or Disabled in this window, it is disabled by default. When the setting is Enabled, the system will insert the circuit ID tag to the received PPPoE discover request and the request packet if the tag is absent. It will remove the circuit ID tag from the received PPPoE offer and session confirmation packet. To view this window, click Configuration > PPPoE Circuit ID Insertion Settings as shown below: Figure 2 - 29 PPPoE Circuit ID Insertion Settings window Ping Test Ping is a small program that sends ICMP Echo packets to the IP address you specify. The destination node then responds to or "echoes" the packets sent from the Switch. This is very useful to verify connectivity between the Switch and other nodes on the network. To access this table, click Configuration > Ping Test Figure 2 - 30 Ping Test window The user may use Infinite times radio button, in the Repeat Pinging for field, which will tell the ping program to keep sending ICMP Echo packets to the specified IP address until the program is stopped. The user may opt to choose a specific number of times to ping the Target I P Address by entering a number between 1 and 255. Click Start to initiate the Ping program

38 SNTP Settings The Simple Network Time Protocol (SNTP) is a protocol for synchronizing computer clocks through the Internet. It provides comprehensive mechanisms to access national time and frequency dissemination services, organize the SNTP subnet of servers and clients, and adjust the system clock in each participant. Time Settings To configure the time settings for the Switch, click Configuration > SNTP Settings > Time Settings Figure 2 - 31 Time Settings window The following parameters can be set or are displayed: Parameter Description Status SNTP State Use the radius button to select an Enabled or Disabled SNTP state. Current Time Displays the Current Time set on the Switch. Time Source Displays the time source for the system. SNTP Settings SNTP First Server This is the IP address of the primary server the SNTP information will be taken from. SNTP Second Server This is the IP address of the secondary server the SNTP information will be taken from. SNTP Po ll I nterval i n Seconds (30-99999) This is the interval, in seconds, between requests for updated SNTP information. Set Current Time Date (DD/MM/YYYY) Enter the current date in day, month and year to update the system clock. Time in (HH:MM:SS) Enter the current time in hours, minutes, and seconds. Click Apply to implement changes made.

39 TimeZone Settings The following window is used to configure time zones and Daylight Savings time settings for SNTP. To configure the time Zone Settings for the Switch, click Configuration > SNTP Settings > TimeZone Settings Figure 2 - 32 Time Zone and DST Settings window The following parameters can be set: Parameter Description Time Zone and DST Daylight Saving Time State Use this pull-down menu to enable or disable the DST Settings. Daylight Saving Time Offset in Minutes Use this pull-down menu to specify the amount of time that will constitute your local DST offset 30, 60, 90, or 120 minutes. Time Zone Offset from GMT in +/- HH:MM Use these pull-down menus to specify your local time zone's offset from Greenwich Mean Time (GMT.) DST Repeating Settings Using repeating mode will enable DST seasonal time adjustment. Repeating mode requires that the DST beginning and ending date be specified using a formula. For example, specify to begin DST on Saturday during the second week of April and end DST on Sunday during the last week of October. From: Which Week of the Month Enter the week of the month that DST will start on.

40 From: Day of the Week Enter the day of the week that DST will start on. From: Month Enter the month DST will start on. From: Time in HH:MM Enter the time of day that DST will start on. To: Which Week of the Month Enter the week of the month the DST will end. To: Day of the Week Enter the day of the week that DST will end. To: Month Enter the month that DST will end. To:Time in HH:MM Enter the time DST will end. DST Annual Settings Using annual mode will enable DST seasonal time adjustment. Annual mode requires that the DST beginning and ending date be specified concisely. For example, specify to begin DST on April 3 and end DST on October 14. From: Month Enter the month DST will start on, each year. From: Day Enter the day of the week DST will start on, each year. From: Time in HH:MM Enter the time of day DST will start on, each year. To: Month Enter the month DST will end, each year. To: Day Enter the date DST will end, each year. To: Time in HH:MM Enter the time of day that DST will end, each year. Click Apply to implement changes made to the Time Zone and DST window. MAC Notification Settings MAC Notification is used to monitor MAC addresses learned and entered into the forwarding database. To globally set MAC notification on the Switch, open the following window by opening the MAC Notification Settings in the Configuration folder. MAC Notification Global Settings To configure the MAC Notification Global Settings for the Switch, click Configuration > MAC Notification Settings > MAC Notification Global Settings Figure 2 - 33 MAC Notification Global Settings window

41 The following parameters may be viewed and modified: Parameter Description State Enable or disable MAC notification globally on the Switch. Interval (1-2147483647 sec) The time in seconds between notifications. History Size (1-500) The maximum number of entries listed in the history log used for notification. Up to 500 entries can be specified. Click Apply to implement changes. MAC Notification Port Settings To configure the MAC Notification Port Settings for the Switch, click Configuration > MAC Notification Settings > MAC Notification Port Settings Figure 2 - 34 MAC Notification Port Settings window The following parameters may be modified: Parameter Description From Port / To Port Select a port or group of ports to enable for MAC notification using the pull-down menus. State Enable MAC Notification for the ports selected using the pull-down menu. Click Apply to implement changes.

42 PoE The DES-3528P switch supports Power over Ethernet (PoE) as defined by the IEEE 802.3af. Ports 1-8 can support PoE up to 35W. Ports 1-24 can supply about 48 VDC power to Powered Devices (PDs) over Category 5 or Category 3 UTP Ethernet cables. The DES-3528P follows the standard PSE (Power Sourcing Equipment) pinout Alternative A, whereby power is sent out over pins 1, 2, 3 and 6. The DES-3528P works with all D-Link 802.3af capable devices. The DES-3528P includes the following PoE features: • Auto-discovery recognizes the connection of a PD (Powered Device) and automatically sends power to it. • The Auto-disable feature occurs under two conditions: firstly, if the total power consumption exceeds the system power limit; and secondly, if the per port power consumption exceeds the per port power limit. • Active circuit protection automatically disables the port if there is a short. Other ports will remain active. Based on 802.3af/at PDs receive power according to the following classification: Class Maximum power available to PD 0 12.95W 1 3.84W 2 6.49W 3 12.95W 4 29.5W To configure the PoE features on the DES-3528P, click Configuration > PoE. The PoE System Settings window is used to assign a power limit and power disconnect method for the whole PoE system. To configure the Power Limit for the PoE system, enter a value between 37W and 370W for the DES-3528P in the Power Limit field. The default setting is 370W. When the total consumed power exceeds the power limit, the PoE controller (located in the PSE) disconnects the power to prevent overloading the power supply. PSE provides power according to the following classification: Class Max power used by PSE 0 15.4W 1 4.0W 2 7.0W 3 15.4W User define 35W (only for ports 1-8)

43 PoE System Settings To configure PoE for the Switch, click Configuration > PoE > PoE System Settings, which will reveal the following window for the user to configure: Figure 2 - 35 PoE System Settings window The following parameters can be configured: Parameter Description Power Limit (37-370) Sets the limit of power to be used from the Switch’s power source to PoE ports. The user may configure a Power Limit between 37 and 370W for the DES-3528P. The default setting is 370W. Power Disconnect Method The PoE controller uses either Deny Next Port or Deny Low Priority Port to offset the power limit being exceeded and keeps the Switch’s power at a usable level. Use the drop down menu to select a Power Disconnect Method. The default Power Disconnect Method is Deny Next Port. Both Power Disconnection Methods are described below: Deny Next Port - After the power limit has been exceeded, the next port attempting to power up is denied, regardless of its priority. If Power Disconnection Method is set to Deny Next Port, the system cannot utilize out of its maximum power capacity. The maximum unused watt is 19W. Deny Low Priority Port - After the power limit has been exceeded, the next port attempting to power up causes the port with the lowest priority to shut down so as to allow the high-priority and critical priority ports to power up. Click Apply to implement changes made.

44 PoE Port Settings To configure the PoE port settings on the Switch, click Configuration > PoE > PoE Port Settings, which will reveal the following window for the user to configure: Figure 2 - 36 PoE Port Settings window The following parameters can be configured: Parameter Description From Port / To Port Select a range of ports from the pull-down menus to be enabled or disabled for PoE. State Use the pull-down menu to enable or disable ports for PoE. Time Range Select a range of the time to the port set as POE. If Time Range is configured, the power can only be supplied during the specified period of time. Priority Use the pull-down menu to select the priority of the PoE ports. Port priority determines the priority which the system attempts to supply the power to the ports. There are three levels of priority that can be selected, critical, high, and low. When multiple ports happen to have the same level of priority, the port ID will be used to determine the priority. The lower port ID has higher priority. The setting of priority will affect the order of supplying power. Whether the disconnect method is set to deny low priority port, the priority of each port will be used by the system to manage the supply of power to ports. Power Limit This function is used to configure the per-port power limit. If a port exceeds its power limit, it will shut down. Based on 802.3af/802.3at, there are different PD classes and power consumption ranges; Class 0 – 0.44~12.95W Class 1 – 0.44~3.84W Class 2 – 3.84~6.49W Class 3 – 6.49~12.95W Class 4 – 12.95W~29.5W (only ports 1~8) The following is the power limit applied to the port for these five classes. For each class, the power limit is a little more than the power consumption range for that class. This takes into account any power loss on the cable. Thus, the following are the typical values; Class 0 : 15400mW Class 1 : 4000mW Class 2 : 7000mW Class 3 : 15400mW User define: 35000mW (15400~35000 only applies to ports 1~8) As well as these four pre-defined settings, users can directly specify any value ranging from 1000mW to 35000mW on port 1~8 and 1000mW~15400mW on port 9~24. NOTE: DES-3528P ports 1~8 can support PoE up to 35W by configuring the PoE port user define value, also all ports can support 802.3af (1000~15400mW). Click Apply to implement changes made. The port status of all PoE configured ports is displayed in the table in the bottom half of the screen shown above.

45 SNMP Settings Simple Network Management Protocol (SNMP) is an OSI Layer 7 (Application Layer) designed specifically for managing and monitoring network devices. SNMP enables network management stations to read and modify the settings of gateways, routers, switches, and other network devices. Use SNMP to configure system features for proper operation, monitor performance and detect potential problems in the Switch, switch group or network. Managed devices that support SNMP include software (referred to as an agent), which runs locally on the device. A defined set of variables (managed objects) is maintained by the SNMP agent and used to manage the device. These objects are defined in a Management Information Base (MIB), which provides a standard presentation of the information controlled by the on-board SNMP agent. SNMP defines both the format of the MIB specifications and the protocol used to access this information over the network. The DES-3528/DES-3552 Series supports the SNMP versions 1, 2c, and 3. The default SNMP setting is disabled. You must enable SNMP. Once SNMP is enabled you can choose which version you want to use to monitor and control the Switch. The three versions of SNMP vary in the level of security provided between the management station and the network device. In SNMP v.1 and v.2, user authentication is accomplished using 'community strings', which function like passwords. The remote user SNMP application and the Switch SNMP must use the same community string. SNMP packets from any station that has not been authenticated are ignored (dropped). The default community strings for the Switch used for SNMP v.1 and v.2 management access are: • public - Allows authorized management stations to retrieve MIB objects. • private - Allows authorized management stations to retrieve and modify MIB objects. SNMPv3 uses a more sophisticated authentication process that is separated into two parts. The first part is to maintain a list of users and their attributes that are allowed to act as SNMP managers. The second part describes what each user on that list can do as an SNMP manager. The Switch allows groups of users to be listed and configured with a shared set of privileges. The SNMP version may also be set for a listed group of SNMP managers. Thus, you may create a group of SNMP managers that are allowed to view read-only information or receive traps using SNMPv1 while assigning a higher level of security to another group, granting read/write privileges using SNMPv3. Using SNMPv3 individual users or groups of SNMP managers can be allowed to perform or be restricted from performing specific SNMP management functions. The functions allowed or restricted are defined using the Object Identifier (OID) associated with a specific MIB. An additional layer of security is available for SNMPv3 in that SNMP messages may be encrypted. To read more about how to configure SNMPv3 settings for the Switch read the next section. Traps Traps are messages that alert network personnel of events that occur on the Switch. The events can be as serious as a reboot (someone accidentally turned OFF the Switch), or less serious like a port status change. The Switch generates traps and sends them to the trap recipient (or network manager). Typical traps include trap messages for Authentication Failure, Topology Change and Broadcast\Multicast Storm. MIBs The Switch in the Management Information Base (MIB) stores management and counter information. The Switch uses the standard MIB-II Management Information Base module. Consequently, values for MIB objects can be retrieved from any SNMP-based network management software. In addition to the standard MIB-II, the Switch also supports its own proprietary enterprise MIB as an extended Management Information Base. Specifying the MIB Object Identifier may also retrieve the proprietary MIB. MIB values can be either read-only or read-write. The DES-3528/DES-3552 Series incorporates a flexible SNMP management for the switching environment. SNMP management can be customized to suit the needs of the networks and the preferences of the network administrator. Use the SNMP V3 menus to select the SNMP version used for specific tasks. The DES-3528/DES-3552 Series supports the Simple Network Management Protocol (SNMP) versions 1, 2c, and 3. The administrator can specify the SNMP version used to monitor and control the Switch. The three versions of SNMP vary in the level of security provided between the management station and the network device.

46 SNMP settings are configured using the menus located on the SNMP V3 folder of the web manager. Workstations on the network that are given SNMP access privileged to the Switch can be restricted with the Security > Trusted Host window. SNMP Global Settings Use this table to globally enable or disable the SNMP Settings on the switch. To view this window, click Configuration > SNMP Settings > SNMP Global Settings: Figure 2 - 37 SNMP Global Settings window SNMP View Table This window is used to assign views to community strings that define which MIB objects can be accessed by a remote SNMP manager. To configure SNMP View Settings for the Switch, click Configuration > SNMP Settings > SNMP View Table Figure 2 - 38 SNMP View Table window The following parameters can be set: Parameter Description View Name Type an alphanumeric string of up to 32 characters. This is used to identify the new SNMP view being created. Subtree OID Type the Object Identifier (OID) Subtree for the view. The OID identifies an object tree (MIB tree) that will be included or excluded from access by an SNMP manager. View Type Select Included to include this object in the list of objects that an SNMP manager can access. Select Excluded to exclude this object from the list of objects that an SNMP manager can access. To implement your new settings, click Apply. To delete an entry click the corresponding Delete button.

47 SNMP Group Table An SNMP Group created with this table maps SNMP users (identified in the SNMP User Table) to the views created in the previous menu. To view this window, click Configuration > SNMP Settings > SNMP Group Table: Figure 2 - 39 SNMP Group Table window To delete an existing SNMP Group Table entry, click the corresponding Delete button. The following parameters can be set: Parameter Description Group Name Type an alphanumeric string of up to 32 characters. This is used to identify the new SNMP group of SNMP users. Read View Name This name is used to specify the SNMP group created can request SNMP messages. Write View Name Specify a SNMP group name for users that are allowed SNMP write privileges to the Switch's SNMP agent. Notify View Name Specify a SNMP group name for users that can receive SNMP trap messages generated by the Switch's SNMP agent. User-based Security Model SNMPv1 - Specifies that SNMP version 1 will be used. SNMPv2 - Specifies that SNMP version 2c will be used. The SNMPv2 supports both centralized and distributed network management strategies. It includes improvements in the Structure of Management Information (SMI) and adds some security features. SNMPv3 - Specifies that the SNMP version 3 will be used. SNMPv3 provides secure access to devices through a combination of authentication and encrypting packets over the network. Security Level The Security Level settings only apply to SNMPv3. NoAuthNoPriv - Specifies that there will be no authorization and no encryption of packets sent between the Switch and a remote SNMP manager. AuthNoPriv - Specifies that authorization will be required, but there will be no encryption of packets sent between the Switch and a remote SNMP manager. AuthPriv - Specifies that authorization will be required, and that packets sent between the Switch and a remote SNMP manger will be encrypted. To implement the new settings, click Apply.

48 SNMP User Table This window displays all of the SNMP User's currently configured on the Switch and also allows you to add new users. To view this window, click Configuration > SNMP Settings > SNMP User Table: Figure 2 - 40 SNMP User Table window To delete an existing SNMP User Table entry, click the corresponding Delete button. The following parameters may be set: Parameter Description User Name An alphanumeric string of up to 32 characters. This is used to identify the SNMP users. Group Name This name is used to specify the SNMP group created can request SNMP messages. SNMP Version V1 - Indicates that SNMP version 1 is in use. V2 - Indicates that SNMP version 2 is in use. V3 - Indicates that SNMP version 3 is in use. SNMP V3 Encryption None – Indicates that there is no SNMP V3 Encryption Password – Indicates that there is SNMP V3 Encryption through a password Key – Indicates that there is SNMP V3 Encryption through a key. Auth-Protocol by Password MD5 - Indicates that the HMAC-MD5-96 authentication level will be used. SHA - Indicates that the HMAC-SHA authentication protocol will be used. Priv-Protocol by Password None - Indicates that no authorization protocol is in use. DES - Indicates that DES 56-bit encryption is in use based on the CBC-DES (DES-56) standard. Auth-Protocol by Key MD5 - Indicates that the HMAC-MD5-96 authentication level will be used. SHA - Indicates that the HMAC-SHA authentication protocol will be used. Priv-Protocol by Key None - Indicates that no authorization protocol is in use. DES - Indicates that DES 56-bit encryption is in use based on the CBC-DES (DES-56) standard. Password Enter a Password when SNMP V3 Encryption is enabled for Password mode. Key Enter a Key when SNMP V3 Encryption is enabled for Key mode.

49 To implement changes made, click Apply. SNMP Community Table Use this table to view existing SNMP Community Table configurations and to create a SNMP community string to define the relationship between the SNMP manager and an agent. The community string acts like a password to permit access to the agent on the Switch. One or more of the following characteristics can be associated with the community string: An Access List of IP addresses of SNMP managers that are permitted to use the community string to gain access to the Switch's SNMP agent. Any MIB view that defines the subset of all MIB objects will be accessible to the SNMP community. Read/write or read-only level permission for the MIB objects accessible to the SNMP community. To configure SNMP Community entries, click Configuration > SNMP Settings > SNMP Community Table Figure 2 - 41 SNMP Community Table window The following parameters can set: Parameter Description Community Name Type an alphanumeric string of up to 32 characters that is used to identify members of an SNMP community. This string is used like a password to give remote SNMP managers access to MIB objects in the Switch's SNMP agent. View Name Type an alphanumeric string of up to 32 characters that is used to identify the group of MIB objects that a remote SNMP manager is allowed to access on the Switch. The view name must exist in the SNMP View Table. Access Right Read Only - Specifies that SNMP community members using the community string created can only read the contents of the MIBs on the Switch. Read Write - Specifies that SNMP community members using the community string created can read from, and write to the contents of the MIBs on the Switch. To implement the new settings, click Apply. To delete an entry from the SNMP Community Table, click the corresponding Delete button.

50 SNMP Host Table Use the SNMP H ost T able window to set up SNMP trap recipients. To configure SNMP Host Table entries, click Configuration > SNMP Settings > SNMP Host Table Figure 2 - 42 SNMP Host Table window The following parameters can set: Parameter Description Host IP Address Type the IP address of the remote management station that will serve as the SNMP host for the Switch. User-based Security Model SNMPv1 - Specifies that SNMP version 1 will be used. SNMPV2c - Specifies that SNMP version 2 will be used. SNMPV3 - To specify that the SNMP version 3 will be used. Security Level NoAuthNoPriv – To specify a NoAuthNoPriv security level. AuthNoPriv - To specify an AuthNoPriv security level. AuthPriv - To specify an AuthPriv security level. Community String/ SNMPv3 User Name Type in the community string or SNMPv3 user name as appropriate. To implement your new settings, click Apply. SNMP Engine ID The Engine ID is a unique identifier used for SNMP V3 implementations. This is an alphanumeric string used to identify the SNMP engine on the Switch. To display the Switch's SNMP Engine ID, click Configuration > S NMP Settings > SNMP Engine ID Figure 2 - 43 SNMP Engine ID window To change the Engine ID, enter the new Engine ID in the space provided and click the Apply button.

51 SNMP Trap Configuration The following window is used to enable and disable trap settings for the SNMP function on the Switch. To view this window for configuration, click Configuration > SNMP Settings > SNMP Trap Configuration Figure 2 - 44 SNMP Trap Configuration window To enable or disable the Traps State and/or the Authenticate Traps State, use the corresponding pull-down menu to change and click Apply. sFlow The sFlow folder contains four windows to enable and configure the sFlow settings on the Switch. sFlow is a technology for monitoring traffic in data networks containing switches and routers. The sFlow monitoring system consists of an sFlow Agent (embedded in a switch or router or in a standalone probe) and a central sFlow Collector. The architecture and sampling techniques used in the sFlow monitoring system were designed for providing continuous site-wide (and enterprise-wide) traffic monitoring of high speed switched and routed networks. sFlow Global State Settings This table is used to enable or disable the sFlow Global State Settings on the Switch. The sFlow version, address and state configurations can also be viewed in this table. To view this window, click Configuration > sFlow > sFlow Global State Settings as shown below: Figure 2 - 45 sFlow Global State Settings window Select Disabled or Enabled and click Apply.

52 sFlow Analyzer Server Settings This window is used to configure the sFlow analyzer server settings. You can specify more than one analyzer server with the same IP address but with different UDP port numbers. You can have up to four unique combinations of IP address and UDP port numbers. To view this window, click Configuration > sFlow > sFlow Analyzer Server Settings as shown below: Figure 2 - 46 sFlow Analyzer Server Settings window The following parameters can be configured: Parameter Description Analyzer Server I D ( 1- 4) Up to four sFlow Analyzer Servers can be configured. Owner Name The description about the sFlow analyzer server(s). When owner is set or modified, the timeout value will become 400 automatically. Timeout (1-2000000) The length of time before the server is timed out. When the analyzer server times out, all of the flow samplers and counter pollers associated with this analyzer server will be deleted. “Infinite” indicates that the analyzer server will never time out. If not specified, the default value is 400. Collector Address The IP address of the analyzer server. If not specified, the address will be 0.0.0.0 which means that the entry will be inactive. Collector Port (1 - 65535) The destination UDP port for sending the sFlow datagrams. If not specified, the default value is 6343. Max Datagram size (300-1400) The maximum number of data bytes that can be packed in a single sample datagram. If not specified, the default value is 1400. Click Apply to implement the changes made. sFlow Flow Sampler Settings This table is used to create sFlow flow sampler settings on the Switch. By configuring the sampling function for a port, a sample packet received by this port will be encapsulated and forwarded to the analyzer server at the specified interval. To view this window, click Configuration > sFlow > sFlow Flow Sampler Settings as shown below:

53 Figure 2 - 47 sFlow Flow Sampler Settings window The following parameters can be configured: Parameter Description From Port / To Port Specifies the port or list of ports to be configured. Analyzer Server I D (1- 4) The analyzer server id specifies the ID of a server analyzer where the packet will be forwarded. Rate (0-65535) The sampling rate for packet sampling. The actual rate is the configured rate value multiplied by 256. For example, if the rate is 20, the actual rate 5120. One packet will be sampled from every 5120 packets. If set to 0, the sampler is disabled. MAX Header Size (18- 256) The maximum number of leading bytes in the packet which will be sampled, encapsulated and forwarded to the server. Click Apply to implement the changes made. sFlow Counter Poller Settings This window is used to create the sflow counter poller settings on the Switch. Within the sflow counter poller function, the port statistics counter information will be forwarded to the server at the configured interval. These counters are RFC 2233 counters. To view this window, click Configuration > sFlow > sFlow Counter Poller Settings as shown below: Figure 2 - 48 sFlow Counter Poller Settings window The following parameters can be configured: Parameter Description From Port / To Port Specifies the port or list of ports to be configured. Analyzer Server I D ( 1- 4) The analyzer server id specifies the ID of a server analyzer where the packet will be forwarded. Interval (20-120) Specifies the maximum number of seconds between successive statistic counter information. To disable the interval, check the Disabled box. Click Apply to implement the changes made.

54 Stacking From firmware release v2.00 of this Switch, the DES-3528/DES-3552 Series now supports switch stacking, where a set of eight switches can be combined to be managed by one IP address through Telnet, the GUI interface (web), the console port or through SNMP. Each switch of this series has two stacking ports located at the rear of the device, which can be used to connect stacking enabled devices and make them stack together. After adding these stacking ports, the user may connect these ports together using copper ables (also sold separately) in one of two possible topologies. Duplex C hain – As shown in Figure 2 - 49, The Duplex Chain topology stacks switches together in a chain-link format. Using this method, data transfer is only possible in one direction and if there is a break in the chain, then data transfer will obviously be affected. Duplex Ring – As shown in Figure 2 - 50, the Duplex Ring stacks switches in a ring or circle format where data can be transferred in two directions. This topology is very resilient due to the fact that if there is a break in the ring, data can still be transferred through the stacking cables between switches in the stack. Figure 2 - 49 Switches stacked in a Duplex Chain Figure 2 - 50 Switches stacked in a Duplex Ring Within each of these topologies, each switch plays a role in the Switch stack. These roles can be set by the user per individual Switch, or if desired, can be automatically determined by the Switch stack. Three possible roles exist when stacking with the DES-3528/DES-3552 Series. NOTE: Only ports 27 and 28 of the DES-3528 Series, or ports 51 and ports 52 of DES- 3552 support stacking. The other ports cannot be used for stacking. For a stacking disabled device, ports 27 and 28 of the DES-3528 Series, or ports 51 and ports 52 of DES-3552 can be used as normal GE ports. Primary Master – The Primary Master is the leader of the stack. It will maintain normal operations, monitor operations and the running topology of the Stack. This switch will also assign Stack Unit IDs, synchronize configurations and transmit commands to remaining switches in the switch stack. The Primary Master can be manually set by assigning this Switch the highest priority (a lower number denotes a higher priority) before physically assembling the stack, or it can be determined automatically by the stack through an election process which determines the lowest MAC address and then will assign that switch as the Primary Master, if all priorities are the same. The Primary master are physically displayed by the seven segment LED to the far right on the front panel of the switch where this LED will flash between its given Box ID and ‘H’. Backup M aster – The Backup Master is the backup to the Primary Master, and will take over the functions of the Primary Master if the Primary Master fails or is removed from the Stack. It also monitors the status of neighboring switches in the stack, will perform commands assigned to it by the Primary Master and will monitor the running status of the Primary Master. The Backup Master can be set by the user by assigning this Switch the second highest priority before physically assembling the stack, or it can be determined automatically by the stack through an election process

55 which determines the second lowest MAC address and then will assign that switch as the Backup Master, if all priorities are the same. Slave – Slave switches constitute the rest of the switch stack and although not Primary or Backup Masters, they can be placed into these roles when these other two roles fail or are removed from the stack. Slave switches perform operations requested by the master, monitor the status of neighbor switches in the stack and the stack topology and adhere to the Backup Master’s commands once it becomes a Primary Master. Slave switches will do a self-check to determine if it is to become the Backup Master if the Backup Master is promoted to the Primary Master, or if the Backup Master fails or is removed from the switch stack. If both Primary and Backup masters fail, or are removed from the Switch stack, it will determine if it is to become the Primary Master. These roles will be determined, first by priority and if the priority is the same, the lowest MAC address. Once switches have been assembled in the topology desired by the user and powered on, the stack will undergo three processes until it reaches a functioning state. Initialization State – This is the first state of the stack, where the runtime codes are set and initialized and the system conducts a peripheral diagnosis to determine each individual switch is functioning properly. Master Election State – Once the codes are loaded and initialized, the stack will undergo the Master Election State where it will discover the type of topology used, elect a Primary Master and then a Backup Master. Synchronization S tate – Once the Primary Master and the Backup Master have been established, the Primary Master will assign Stacking Unit IDs to switches in the stack, synchronize configurations for all switches and then transmit commands to the rest of the switches based on the users configurations of the Primary Master. Once these steps have been completed, the switch stack will enter a normal operating mode. Stack Switch Swapping The stacking feature of the DES-3528/DES-3552 Series supports “hot swapping” of switches in and out of the running stack. Users may remove or add switches to the stack without powering down or largely affecting the transfer of data between switches in the stack, with a few minor provisions. When switches are “hot inserted” into the running stack, the new switch may take on the Primary Master, Backup Master or Slave role, depending on configurations set on the newly added switch, such as configured priority or MAC address. Yet, if adding two stacks together that have both previously undergone the election process, and therefore both have a Primary Master and a Backup master, a new Primary Master will be elected from one of the already existing Primary Masters, based on priority or MAC address. This Primary Master will take over all of the Primary Master’s roles for all new switches that were hot inserted. This process is done using discovery packets that circulate through the switch stack every 1.5 seconds until the discovery process has been completed. The “hot remove” action means removing a device from the stack while the stack is still running. The hot removal is detected by the stack when it fails to receive heartbeat packets during its specified interval from a device, or when one of the stacking ports links is down. Once the device has been removed, the remaining switches will update their stacking topology database to reflect the change. Any one of the three roles, Primary Master, Backup Master or Slave, may be removed from the stack, yet different processes occur for each specific device removal. If a Slave device has been removed, the Primary Master will inform other switches of the hot remove of this device through the use of unit leave messages. Switches in the stack will clear the configurations of the unit removed, and dynamically learned databases, such as ARP, will be cleared as well. If the Backup Master has been hot removed, a new Backup Master will be chosen through the election process previously described. Switches in the stack will clear the configurations of the unit removed, and dynamically learned databases, such as ARP, will be cleared as well. Then the Backup Master will begin backing up the Primary Master when the database synchronization has been completed by the stack. If the Primary Master is removed, the Backup Master will assume the Primary Master’s role and a new Backup Master will be chosen using the election process. Switches in the stack will clear the configurations of the unit removed, and dynamically learned databases, such as ARP, will be cleared as well. The new Primary Master will inherit the MAC and IP address of the previous Primary Master to avoid conflict within the stack and the network itself. If both the Primary Master and the Backup Master are removed, the election process is immediately processed and a new Primary Master and Backup Master is determined. Switches in the stack will clear the configurations of the units removed, and dynamically learned databases, such as ARP, will be cleared as well. Static switch configurations still remain in the database of the remaining switches in the stack and those functions will not be affected.

56 NOTE: If there is a Box ID conflict when the stack is in the discovery phase, the device will enter a special standalone topology mode. Users can only get device information, configure Box IDs, save and reboot. All stacking ports will be disabled and an error message will be produced on the local console port of each device in the stack. Users must reconfigure Box IDs and reboot the stack. Stacking Mode Settings This window is to enable the switch stack (up to 8) and configure the priority of the stacking boxes. To open this window, click Configuration > Stacking Mode Settings Figure 2 - 51 Stacking Mode Settings window The following parameters can be configured: Parameter Description Stacking Mode Click Enabled or Disabled to enable or disable the stacking function. Current Box ID Use the dorp-down menu to identify the Switch being configured. The box ID is 1 – 8. New Box ID Use the drop-down menu to assign a new box ID to the Switch. The new box ID is Auto, or 1 – 8. Priority (1-63) Enter a number to assign a priority value to the box, with lower numbers having higher priority. The possible priority range is 1 – 63. Time Range Settings The Time Range window is used in conjunction with the Access Profile feature to determine a starting point and an ending point, based on days of the week, when an Access Profile configuration will be enabled on the Switch. Once configured here, the time range settings are to be applied to an access profile rule using the Access Profile table. The user may enter up to 64 time range entries on the Switch. To open this window, click Configuration > Time Range Settings Figure 2 - 52 Time Range Settings window

57 Single IP Management Simply put, D-Link Single IP Management is a concept that will stack switches together over Ethernet instead of using stacking ports or modules. There are some advantages in implementing the "Single IP Management" feature: 1. SIM can simplify management of small workgroups or wiring closets while scaling the network to handle increased bandwidth demand. 2. SIM can reduce the number of IP address needed in your network. 3. SIM can eliminate any specialized cables for stacking connectivity and remove the distance barriers that typically limit your topology options when using other stacking technology. Switches using D-Link Single IP Management (labeled here as SIM) must conform to the following rules: SIM is an optional feature on the Switch and can easily be enabled or disabled through the Command Line Interface or Web Interface. SIM grouping has no effect on the normal operation of the Switch in the user's network. There are three classifications for SIM. The Commander Switch (CS), which is the master switch of the group, Member Switch (MS), which is a switch that is recognized by the CS a member of a SIM group, and a Candidate Switch (CaS), which is a Switch that has a physical link to the SIM group but has not been recognized by the CS as a member of the SIM group. A SIM group can only have one Commander Switch (CS). All switches in a particular SIM group must be in the same IP subnet (broadcast domain). Members of a SIM group cannot cross a router. A SIM group accepts up to 33 switches (numbered 0-32), including the Commander Switch (numbered 0). There is no limit to the number of SIM groups in the same IP subnet (broadcast domain), however a single switch can only belong to one group. If multiple VLANs are configured, the SIM group will only utilize the system VLAN on any switch. SIM allows intermediate devices that do not support SIM. This enables the user to manage switches that are more than one hop away from the CS. The SIM group is a group of switches that are managed as a single entity. SIM switches may take on three different roles: 1. Commander Switch (CS) - This is a switch that has been manually configured as the controlling device for a group, and takes on the following characteristics: It has an IP Address. It is not a commander switch or member switch of another Single IP group. It is connected to the member switches through its management VLAN. 2. Member Switch (MS) - This is a switch that has joined a single IP group and is accessible from the CS, and it takes on the following characteristics: It is not a CS or MS of another Single IP group. It is connected to the CS through the CS management VLAN. 3. Candidate Switch (CaS) - This is a switch that is ready to join a SIM group but is not yet a member of the SIM group. The Candidate Switch may join the SIM group of a switch by manually configuring it to be a MS of a SIM group. A switch configured as a CaS is not a member of a SIM group and will take on the following characteristics: It is not a CS or MS of another Single IP group. It is connected to the CS through the CS management VLAN After configuring one switch to operate as the CS of a SIM group, additional switches may join the group through a direct connection to the Commander switch. Only the Commander switch will allow entry to the candidate switch enabled for SIM. The CS will then serve as the in band entry point for access to the MS. The CS's IP address will become the path to all MS's of the group and the CS's Administrator's password, and/or authentication will control access to all MS's of the SIM group. With SIM enabled, the applications in the CS will redirect the packet instead of executing the packets. The applications will decode the packet from the administrator, modify some data, then send it to the MS. After execution, the CS may receive a response packet from the MS, which it will encode and send it back to the administrator. When a CS becomes a MS, it automatically becomes a member of the first SNMP community (include read/write and read only) to which the CS belongs. However, if a MS has its own IP address, it can belong to SNMP communities to which other switches in the group, including the CS, do not belong.

58 The Upgrade to v1.6 To better improve SIM management, the DES-3528/DES-3552 Series has been upgraded to version 1.6 in this release. Many improvements have been made, including: 1. The Commander Switch (CS) now has the capability to automatically rediscover member switches that have left the SIM group, either through a reboot or web malfunction. This feature is accomplished through the use of Discover packets and Maintain packets that previously set SIM members will emit after a reboot. Once a MS has had its MAC address and password saved to the CS’s database, if a reboot occurs in the MS, the CS will keep this MS information in its database and when a MS has been rediscovered, it will add the MS back into the SIM tree automatically. No configuration will be necessary to rediscover these switches. There are some instances where pre-saved MS switches cannot be rediscovered. For example, if the Switch is still powered down, if it has become the member of another group, or if it has been configured to be a Commander Switch, the rediscovery process cannot occur. 3. This version will support multiple switch upload and downloads for firmware, configuration files and log files, as follows: • Firmware – The switch now supports multiple MS firmware downloads from a TFTP server. • Configuration F iles – This switch now supports multiple downloading and uploading of configuration files both to (for configuration restoration) and from (for configuration backup) MS’s, using a TFTP server. • Log – The switch now supports uploading multiple MS log files to a TFTP server. 4. The user may zoom in and zoom out when utilizing the topology window to get a better, more defined view of the configurations. Single IP Settings All switches are set as Candidate (CaS) switches as their factory default configuration and Single IP Management will be disabled. To enable SIM for the Switch using the Web interface, click Configuration > Single IP Managemnet > Single IP Settings which will reveal the following window: Figure 2 - 53 Single IP Settings window (disabled) Change the SIM State to Enabled, and the Role State to Commander using the pull-down menu and click Apply. 2. The topology map now includes new features for connections that are a member of a port trunking group. It will display the speed and number of Ethernet connections creating this port trunk group, as shown in the adjacent picture.

59 Figure 2 - 54 Single IP Settings window (enabled) The following parameters can be set: Parameters Description SIM State Use the pull-down menu to either enable or disable the SIM state on the Switch. Disabled will render all SIM functions on the Switch inoperable. Role State Use the pull-down menu to change the SIM role of the Switch. The two choices are: Candidate - A Candidate Switch (CaS) is not the member of a SIM group but is connected to a Commander Switch. This is the default setting for the SIM role. Commander - Choosing this parameter will make the Switch a Commander Switch (CS). The user may join other switches to this Switch, over Ethernet, to be part of its SIM group. Choosing this option will also enable the Switch to be configured for SIM. Group Name The user may enter a name for the group. Discovery Interval (30-90) The user may set the discovery protocol interval, in seconds that the Switch will send out discovery packets. Returning information to a Commander Switch will include information about other switches connected to it. (Ex. MS, CaS). The user may set the Discovery Interval from 30 to 90 seconds. Hold T ime C ount (100-255) This parameter may be set for the time, in seconds the Switch will hold information sent to it from other switches, utilizing the Discovery Interval. The user may set the hold time from 100 to 255 seconds. Click Apply to implement the settings. After enabling the Switch to be a Commander Switch (CS), the Single IP Management folder will then contain four added links to aid the user in configuring SIM through the web, including Topology, Firmware Upgrade and Configuration Backup/Restore and Upload Log File. Topology The Topology window will be used to configure and manage the Switch within the SIM group and requires Java script to function properly on your computer. The Java Runtime Environment on your server should initiate and lead you to the topology window, as seen below.

60 Figure 2 - 55 Single IP Management window - Tree View The Tree View window holds the following information under the Data tab: Parameter Description Device Name This field will display the Device Name of the switches in the SIM group configured by the user. If no Device Name is configured by the name, it will be given the name default and tagged with the last six digits of the MAC Address to identify it. Remote Port Displays the number of the physical port on the CS that the MS or CaS is connected to. The CS will have no entry in this field. Speed Displays the connection speed between the CS and the MS or CaS. Local Port Displays the number of the physical port on the MS or CaS that the CS is connected to. The CS will have no entry in this field. MAC Address Displays the MAC address of the corresponding Switch. Model Name Displays the full model name of the corresponding Switch. To view the Topology Map, click the View menu in the toolbar and then Topology, which will produce the following window. The Topology View will refresh itself periodically (20 seconds by default).

61 Figure 2 - 56 Topology view This window will display how the devices within the Single IP Management Group are connected to other groups and devices. Possible icons in this screen are as follows: Icon Description Group Layer 2 commander switch Layer 3 commander switch Commander switch of other group Layer 2 member switch. Layer 3 member switch Member switch of other group Layer 2 candidate switch Layer 3 candidate switch Unknown device Non-SIM devices

62 Tool Tips In the Topology view window, the mouse plays an important role in configuration and in viewing device information. Setting the mouse cursor over a specific device in the topology window (tool tip) will display the same information about a specific device as the Tree view does. See the window below for an example. Figure 2 - 57 Device Information Utilizing the Tool Tip Setting the mouse cursor over a line between two devices will display the connection speed between the two devices, as shown below. Figure 2 - 58 Port Speed Utilizing the Tool Tip

63 Right-Click Right-clicking on a device will allow the user to perform various functions, depending on the role of the Switch in the SIM group and the icon associated with it. Group Icon Figure 2 - 59 Right-Clicking a Group Icon Figure 2 - 60 Figure 6- 7. Property window This window holds the following information: Parameter Description Device Name This field will display the Device Name of the switches in the SIM group configured by the user. If no Device Name is configured by the name, it will be given the name default and tagged with the last six digits of the MAC Address to identify it. Module Name Displays the full module name of the switch that was right-clicked. MAC Address Displays the MAC Address of the corresponding Switch. Local Port No. Displays the number of the physical port on the MS or CaS that the CS is connected to. The CS will have no entry in this field. Remote Port No. Displays the number of the physical port on the CS that the MS or CaS is connected to. The CS will have no entry in this field. Port Speed Displays the connection speed between the CS and the MS or CaS

64 Click Close to close the Property window. Commander Switch Icon Figure 2 - 61 Right-Clicking a Commander Icon The following options may appear for the user to configure: Collapse - To collapse the group that will be represented by a single icon. Expand - To expand the SIM group, in detail. Property - To pop up a window to display the group information. Member Switch Icon Figure 2 - 62 Right-Clicking a Member icon The following options may appear for the user to configure: Collapse - To collapse the group that will be represented by a single icon. Expand - To expand the SIM group, in detail. Remove from group - Remove a member from a group. Configure - Launch the web management to configure the Switch. Property - To pop up a window to display the device information. Candidate Switch Icon Figure 2 - 63 Right-Clicking a Candidate icon The following options may appear for the user to configure:

65 Collapse - To collapse the group that will be represented by a single icon. Expand - To expand the SIM group, in detail. Add to group - Add a candidate to a group. Clicking this option will reveal the following dialog for the user to enter a password for authentication from the Candidate Switch before being added to the SIM group. Click OK to enter the password or Cancel to exit the window. Figure 2 - 64 Input password window Property - To pop up a window to display the device information, as shown below. Menu Bar The Single IP Management window contains a menu bar for device configurations, as seen below. Figure 2 - 65 Menu Bar of the Topology View The five menus on the menu bar are as follows. File Print Setup - Will view the image to be printed. Print Topology - Will print the topology map. Preference - Will set display properties, such as polling interval, and the views to open at SIM startup. Group Add to group - Add a candidate to a group. Clicking this option will reveal the following dialog for the user to enter a password for authentication from the Candidate Switch before being added to the SIM group. Click OK to enter the password or Cancel to exit the window. Figure 2 - 66 Input password window Remove from Group - Remove an MS from the group. Device Configure - Will open the web manager for the specific device. View Refresh - Update the views with the latest status.

66 Topology - Display the Topology view. Help About - Will display the SIM information, including the current SIM version. Figure 2 - 67 About window Firmware Upgrade This screen is used to upgrade firmware from the Commander Switch to the Member Switch. Member Switches will be listed in the table and will be specified by Port (port on the CS where the MS resides), MAC Address, Model Name and Version. To specify a certain Switch for firmware download, click its corresponding check box under the Port heading. To update the firmware, enter the Server I P Address where the firmware resides and enter the Path/Filename of the firmware. Click Download to initiate the file transfer. To access the following window, click Configuration > Single IP Management > Firmware Upgrade Figure 2 - 68 Firmware Upgrade window Configuration File Backup/Restore This screen is used to upgrade configuration files from the Commander Switch to the Member Switch using a TFTP server. Member Switches will be listed in the table and will be specified by ID, Port (port on the CS where the MS resides), MAC Address, Model Name and Firmware Version. To update the configuration file, enter the Server IP Address where the file resides and enter the Path/Filename of the configuration file. Click Restore to initiate the file transfer from a TFTP server to the Switch. Click Backup to backup the configuration file to a TFTP server. To access the following window, click Configuration > Single IP Management > Configuration File Backup/Restore Figure 2 - 69 Configuration File Backup/Restore window Upload Log File The following window is used to upload log files from SIM member switches to a specified PC. To upload a log file, enter the Server IP address of the SIM member switch and then enter a Path\Filename on your PC where you wish to

67 save this file. Click Upload to initiate the file transfer. To view this window click Configuration > Single IP Management > Upload Log File Figure 2 - 70 Upload Log File window

68 Section 3 L2 Features Jumbo Frame 802.1Q VLAN Voice VLAN Subnet VLAN QinQ 802.1v Protocol VLAN RSPAN Settings GVRP Settings GVRP Timer Settings Asymmetric VLAN Settings MAC-based VLAN Settings PVID Auto Assign Settings VLAN Trunk Settings Port Trunking LACP Port Settings Traffic Segmentation IGMP Snooping MLD Snooping Settings Port Mirror Loopback Detection Settings BPDU Attack Protection Settings Spanning Tree Forwarding & Filtering LLDP CFM Ethernet OAM The following section will aid the user in configuring Layer 2 functions for the Switch. The Switch includes various functions all discussed in detail in the following section. Jumbo Frame This window will enable or disable the Jumbo Frame function on the Switch. The default is Disabled. When enabled, jumbo frame (frames larger than the standard Ethernet frame size of 1536 bytes) of up to 9K can be transmitted by the Switch. To view this window click L2 Features > Jumbo Frame Figure 3 - 1 Jumbo Frame window

69 Click Apply to implement changes made. VLANs Understanding IEEE 802.1p Priority Priority tagging is a function defined by the IEEE 802.1p standard designed to provide a means of managing traffic on a network where many different types of data may be transmitted simultaneously. It is intended to alleviate problems associated with the delivery of time critical data over congested networks. The quality of applications that are dependent on such time critical data, such as video conferencing, can be severely and adversely affected by even very small delays in transmission. Network devices that are in compliance with the IEEE 802.1p standard have the ability to recognize the priority level of data packets. These devices can also assign a priority label or tag to packets. Compliant devices can also strip priority tags from packets. This priority tag determines the packet's degree of expeditiousness and determines the queue to which it will be assigned. Priority tags are given values from 0 to 7 with 0 being assigned to the lowest priority data and 7 assigned to the highest. The highest priority tag 7 is generally only used for data associated with video or audio applications, which are sensitive to even slight delays, or for data from specified end users whose data transmissions warrant special consideration. The Switch allows you to further tailor how priority tagged data packets are handled on your network. Using queues to manage priority tagged data allows you to specify its relative priority to suit the needs of your network. There may be circumstances where it would be advantageous to group two or more differently tagged packets into the same queue. Generally, however, it is recommended that the highest priority queue, Queue 7, be reserved for data packets with a priority value of 7. Packets that have not been given any priority value are placed in Queue 0 and thus given the lowest priority for delivery. Strict mode and weighted round robin system are employed on the Switch to determine the rate at which the queues are emptied of packets. The ratio used for clearing the queues is 4:1. This means that the highest priority queue, Queue 7, will clear 4 packets for every 1 packet cleared from Queue 0. Remember, the priority queue settings on the Switch are for all ports, and all devices connected to the Switch will be affected. This priority queuing system will be especially beneficial if your network employs switches with the capability of assigning priority tags. VLAN Description A Virtual Local Area Network (VLAN) is a network topology configured according to a logical scheme rather than the physical layout. VLANs can be used to combine any collection of LAN segments into an autonomous user group that appears as a single LAN. VLANs also logically segment the network into different broadcast domains so that packets are forwarded only between ports within the VLAN. Typically, a VLAN corresponds to a particular subnet, although not necessarily. VLANs can enhance performance by conserving bandwidth, and improve security by limiting traffic to specific domains. A VLAN is a collection of end nodes grouped by logic instead of physical location. End nodes that frequently communicate with each other are assigned to the same VLAN, regardless of where they are physically on the network. Logically, a VLAN can be equated to a broadcast domain, because broadcast packets are forwarded to only members of the VLAN on which the broadcast was initiated. Notes About VLANs No matter what basis is used to uniquely identify end nodes and assign these nodes VLAN membership, packets cannot cross VLANs without a network device performing a routing function between the VLANs. The Switch supports IEEE 802.1Q VLANs and Port-Based VLANs. The port untagging function can be used to remove the 802.1Q tag from packet headers to maintain compatibility with devices that are tag-unaware. The Switch's default is to assign all ports to a single 802.1Q VLAN named "default." The "default" VLAN has a VID = 1. The member ports of Port-based VLANs may overlap, if desired.

70 IEEE 802.1Q VLANs Some relevant terms: Tagging - The act of putting 802.1Q VLAN information into the header of a packet. Untagging - The act of stripping 802.1Q VLAN information out of the packet header. Ingress p ort - A port on a switch where packets are flowing into the Switch and VLAN decisions must be made. Egress port - A port on a switch where packets are flowing out of the Switch, either to another switch or to an end station, and tagging decisions must be made. IEEE 802.1Q (tagged) VLANs are implemented on the Switch. 802.1Q VLANs require tagging, which enables them to span the entire network (assuming all switches on the network are IEEE 802.1Q-compliant). VLANs allow a network to be segmented in order to reduce the size of broadcast domains. All packets entering a VLAN will only be forwarded to the stations (over IEEE 802.1Q enabled switches) that are members of that VLAN, and this includes broadcast, multicast and unicast packets from unknown sources. VLANs can also provide a level of security to your network. IEEE 802.1Q VLANs will only deliver packets between stations that are members of the VLAN. Any port can be configured as either tagging or untagging. The untagging feature of IEEE 802.1Q VLANs allows VLANs to work with legacy switches that don't recognize VLAN tags in packet headers. The tagging feature allows VLANs to span multiple 802.1Q-compliant switches through a single physical connection and allows Spanning Tree to be enabled on all ports and work normally. The IEEE 802.1Q standard restricts the forwarding of untagged packets to the VLAN of which the receiving port is a member. Figure 3 - 2 IEEE 802.1Q Packet Forwarding 802.1Q VLAN Tags The figure below shows the 802.1Q VLAN tag. There are four additional octets inserted after the source MAC address. Their presence is indicated by a value of 0x8100 in the EtherType field. When a packet's EtherType field is equal to 0x8100, the packet carries the IEEE 802.1Q/802.1p tag. The tag is contained in the following two octets and consists of 3 bits of user priority, 1 bit of Canonical Format Identifier (CFI - used for encapsulating Token Ring packets so they can be carried across Ethernet backbones), and 12 bits of VLAN ID (VID). The 3 bits of user priority are used by 802.1p. The VID is the VLAN identifier and is used by the 802.1Q standard. Because the VID is 12 bits long, 4094 unique VLANs can be identified. The tag is inserted into the packet header making the entire packet longer by 4 octets. All of the information originally contained in the packet is retained. The main characteristics of IEEE 802.1Q are as follows: Assigns packets to VLANs by filtering. Assumes the presence of a single global spanning tree. Uses an explicit tagging scheme with one-level tagging. 802.1Q VLAN Packet Forwarding Packet forwarding decisions are made based upon the following three types of rules: Ingress rules - rules relevant to the classification of received frames belonging to a VLAN. Forwarding rules between ports - decides whether to filter or forward the packet. Egress rules - determines if the packet must be sent tagged or untagged.

71 Figure 3 - 3 IEEE 802.1Q Tag The EtherType and VLAN ID are inserted after the MAC source address, but before the original EtherType/Length or Logical Link Control. Because the packet is now a bit longer than it was originally, the Cyclic Redundancy Check (CRC) must be recalculated. Figure 3 - 4 Adding an IEEE 802.1Q Tag Port VLAN ID Packets that are tagged (are carrying the 802.1Q VID information) can be transmitted from one 802.1Q compliant network device to another with the VLAN information intact. This allows 802.1Q VLANs to span network devices (and indeed, the entire network, if all network devices are 802.1Q compliant). Unfortunately, not all network devices are 802.1Q compliant. These devices are referred to as tag-unaware. 802.1Q devices are referred to as tag-aware. Prior to the adoption of 802.1Q VLANs, port-based and MAC-based VLANs were in common use. These VLANs relied upon a Port VLAN ID (PVID) to forward packets. A packet received on a given port would be assigned that port's PVID and then be forwarded to the port that corresponded to the packet's destination address (found in the Switch's forwarding table). If the PVID of the port that received the packet is different from the PVID of the port that is to transmit the packet, the Switch will drop the packet. Within the Switch, different PVIDs mean different VLANs (remember that two VLANs cannot communicate without an external router). So, VLAN identification based upon the PVIDs cannot create VLANs that extend outside a given switch (or switch stack).

72 Every physical port on a switch has a PVID. 802.1Q ports are also assigned a PVID, for use within the Switch. If no VLANs are defined on the Switch, all ports are then assigned to a default VLAN with a PVID equal to 1. Untagged packets are assigned the PVID of the port on which they were received. Forwarding decisions are based upon this PVID, in so far as VLANs are concerned. Tagged packets are forwarded according to the VID contained within the tag. Tagged packets are also assigned a PVID, but the PVID is not used to make packet-forwarding decisions, the VID is. Tag-aware switches must keep a table to relate PVIDs within the Switch to VIDs on the network. The Switch will compare the VID of a packet to be transmitted to the VID of the port that is to transmit the packet. If the two VIDs are different, the Switch will drop the packet. Because of the existence of the PVID for untagged packets and the VID for tagged packets, tag-aware and tag-unaware network devices can coexist on the same network. A switch port can have only one PVID, but can have as many VIDs as the Switch has memory in its VLAN table to store them. Because some devices on a network may be tag-unaware, a decision must be made at each port on a tag-aware device before packets are transmitted - should the packet to be transmitted have a tag or not? If the transmitting port is connected to a tag-unaware device, the packet should be untagged. If the transmitting port is connected to a tag- aware device, the packet should be tagged. Tagging and Untagging Every port on an 802.1Q compliant switch can be configured as tagging or untagging. Ports with tagging enabled will put the VID number, priority and other VLAN information into the header of all packets that flow into and out of it. If a packet has previously been tagged, the port will not alter the packet, thus keeping the VLAN information intact. Other 802.1Q compliant devices on the network to make packet-forwarding decisions can then use the VLAN information in the tag. Ports with untagging enabled will strip the 802.1Q tag from all packets that flow into and out of those ports. If the packet doesn't have an 802.1Q VLAN tag, the port will not alter the packet. Thus, all packets received by and forwarded by an untagging port will have no 802.1Q VLAN information. (Remember that the PVID is only used internally within the Switch). Untagging is used to send packets from an 802.1Q-compliant network device to a non- compliant network device. Ingress Filtering A port on a switch where packets are flowing into the Switch and VLAN decisions must be made is referred to as an ingress port. If ingress filtering is enabled for a port, the Switch will examine the VLAN information in the packet header (if present) and decide whether or not to forward the packet. If the packet is tagged with VLAN information, the ingress port will first determine if the ingress port itself is a member of the tagged VLAN. If it is not, the packet will be dropped. If the ingress port is a member of the 802.1Q VLAN, the Switch then determines if the destination port is a member of the 802.1Q VLAN. If it is not, the packet is dropped. If the destination port is a member of the 802.1Q VLAN, the packet is forwarded and the destination port transmits it to its attached network segment. If the packet is not tagged with VLAN information, the ingress port will tag the packet with its own PVID as a VID (if the port is a tagging port). The switch then determines if the destination port is a member of the same VLAN (has the same VID) as the ingress port. If it does not, the packet is dropped. If it has the same VID, the packet is forwarded and the destination port transmits it on its attached network segment. This process is referred to as ingress filtering and is used to conserve bandwidth within the Switch by dropping packets that are not on the same VLAN as the ingress port at the point of reception. This eliminates the subsequent processing of packets that will just be dropped by the destination port. Default VLANs The Switch initially configures one VLAN, VID = 1, called "default." The factory default setting assigns all ports on the Switch to the "default." As new VLANs are configured in Port-based mode, their respective member ports are removed from the "default." Packets cannot cross VLANs. If a member of one VLAN wants to connect to another VLAN, the link must be through an external router.

73 NOTE: If no VLANs are configured on the Switch, then all packets will be forwarded to any destination port. Packets with unknown source addresses will be flooded to all ports. Broadcast and multicast packets will also be flooded to all ports. An example is presented below: VLAN Name VID Switch Ports System (default) 1 5, 6, 7, 8, 21, 22, 23, 24 Engineering 2 9, 10, 11, 12 Marketing 3 13, 14, 15, 16 Finance 4 17, 18, 19, 20 Sales 5 1, 2, 3, 4 Table 3 - 1 VLAN Example - Assigned Ports Port-based VLANs Port-based VLANs limit traffic that flows into and out of switch ports. Thus, all devices connected to a port are members of the VLAN(s) the port belongs to, whether there is a single computer directly connected to a switch, or an entire department. On port-based VLANs, NICs do not need to be able to identify 802.1Q tags in packet headers. NICs send and receive normal Ethernet packets. If the packet's destination lies on the same segment, communications take place using normal Ethernet protocols. Even though this is always the case, when the destination for a packet lies on another switch port, VLAN considerations come into play to decide if the packet gets dropped by the Switch or delivered. VLAN Segmentation Take for example a packet that is transmitted by a machine on Port 1 that is a member of VLAN 2. If the destination lies on another port (found through a normal forwarding table lookup), the Switch then looks to see if the other port (Port 10) is a member of VLAN 2 (and can therefore receive VLAN 2 packets). If Port 10 is not a member of VLAN 2, then the packet will be dropped by the Switch and will not reach its destination. If Port 10 is a member of VLAN 2, the packet will go through. This selective forwarding feature based on VLAN criteria is how VLANs segment networks. The key point being that Port 1 will only transmit on VLAN 2. Network resources can be shared across VLANs. This is achieved by setting up overlapping VLANs. That is ports can belong to more than one VLAN group. For example, by setting VLAN 1 members to ports 1, 2, 3 and 4 and VLAN 2 members to ports 1, 5, 6 and 7, Port 1 will belong to two VLAN groups. Ports 8, 9 and 10 are not configured to any VLAN group. This means ports 8, 9 and 10 are in the same VLAN group. VLAN and Trunk Groups The members of a trunk group have the same VLAN setting. Any VLAN setting on the members of a trunk group will apply to the other member ports. NOTE: In order to use VLAN segmentation in conjunction with port trunk groups, you can first set the port trunk group(s), and then you may configure VLAN settings. If you wish to change the port trunk grouping with VLANs already in place, you will not need to reconfigure the VLAN settings after changing the port trunk group settings. VLAN settings will automatically change in conjunction with the change of the port trunk group settings. Double VLANs Double or Q-in-Q VLANs allow network providers to expand their VLAN configurations to place customer VLANs within a larger inclusive VLAN, which adds a new layer to the VLAN configuration. This basically lets large ISP's create L2 Virtual Private Networks and also create transparent LANs for their customers, which will connect two or more customer LAN points without over-complicating configurations on the client's side. Moreover, the administrator

74 now has over 4000 VLANs that can be placed, and this greatly expands the VLAN network and enables greater support of customers utilizing multiple VLANs on the network. Double VLANs are basically VLAN tags placed within existing IEEE 802.1Q VLANs which we will call SPVIDs (Service Provider VLAN IDs). These VLANs are marked by a TPID (Tagged Protocol ID), configured in hex form to be encapsulated within the VLAN tag of the packet. This identifies the packet as double-tagged and segregates it from other VLANs on the network, therefore creating a hierarchy of VLANs within a single packet. Here is an example Double VLAN tagged packet. Destination Address Source Address SPVLAN ( TPID + Service P rovider VLAN Tag) 802.1Q C EVLAN T ag (TPID + Customer VLAN Tag) Ether Type Payload Consider the example below: Figure 3 - 5 Double VLAN Example In this example, the Service Provider Access Network switch (Provider edge switch) is the device creating and configuring Double VLANs with different SPVIDs for specific customers (say Customer A and Customer B). Both CEVLANs (Customer VLANs), CEVLAN 10 are tagged with the SPVID 100 (for Customer A) and SPVID 200 (for Customer B) on the Service Provider Access Network, thus being a member of two VLANs on the Service Provider’s network. In this way, the Customer can retain their normal VLAN ID’s and the Service Provider can seperate multiple Customer VLANs using SPVLANs, thus greatly regulating traffic and routing on the Service Provider switch. This information is then routed to the Service Provider’s main network and regarded there as one VLAN, with one set of protocols and one routing behavior. Regulations for Double VLANs Some rules and regulations apply with the implementation of the Double VLAN procedure. 1. All ports must be configured for the SPVID and its corresponding TPID on the Service Provider’s edge switch.

75 2. All ports must be configured as Access Ports or Uplink ports. Access ports can only be Ethernet ports while Uplink ports must be Gigabit ports. 3. Provider Edge switches must allow frames of at least 1522 bytes or more, due to the addition of the SPVID tag. 4. Access Ports must be an un-tagged port of the service provider VLANs. Uplink Ports must be a tagged port of the service provider VLANs. 5. The switch cannot have both double and normal VLANs co-existing. Once the change of VLAN is made, all Access Control lists are cleared and must be reconfigured. 6. Once Double VLANs are enabled, GVRP must be disabled. 7. All packets sent from the CPU to the Access ports must be untagged. 8. The following functions will not operate when the switch is in Double VLAN mode: • Guest VLANs • Web-based Access Control • IP Multicast Routing • GVRP • All Regular 802.1Q VLAN functions 802.1Q VLAN The 802.1Q VLAN window lists all previously configured VLANs by VLAN ID and VLAN Name. To view this window click L2 Features > 802.1Q VLAN Figure 3 - 6 Current 802.1Q Static VLANs Entries window To create a new 802.1Q VLAN entry or edit an existing one, click the Add/Edit VLAN tab at the top of the 802.1Q VLAN window. A new window will appear, as shown below, to configure the port settings and to assign a unique name and number to the new VLAN. See the table below for a description of the parameters in the new window. NOTE: After all IP interfaces are set for your configurations, VLANs on the switch can be routed without any additional steps.

76 Figure 3 - 7 802.1Q VLAN window – Add/Edit VLAN Tab window To return to the 802.1Q V LAN window, click the VLAN L ist Tab at the top of the window. To change an existing 802.1Q VLAN entry, click the corresponding Edit button. A new window will appear to configure the port settings and to assign a unique name and number to the new VLAN. See the table below for a description of the parameters in the new menu. NOTE: The Switch supports up to 4k static VLAN entries. Figure 3 - 8 802.1Q VLAN window – Edit window The following fields can then be set in either the Add/Edit VLAN or Edit 802.1Q VLAN windows: Parameter Description VID (VLAN ID) Allows the entry of a VLAN ID, or displays the VLAN ID of an existing VLAN in the Edit window. VLANs can be identified by either the VID or the VLAN name. VLAN Name Allows the entry of a name for a new VLAN, or modifying the VLAN name in the Edit window. VLAN Name should be no more than 32 characters in length.

77 Advertisement Enabling this function will allow the Switch to send out GVRP packets to outside sources, notifying that they may join the existing VLAN. Port Settings Allows an individual port to be specified as member of a VLAN. Tagged Specifies the port as 802.1Q tagged. Checking the box will designate the port as Tagged. Untagged Specifies the port as 802.1Q untagged. Checking the box will designate the port as untagged. Forbidden Select this to specify the port as not being a member of the VLAN and that the port is forbidden from becoming a member of the VLAN dynamically. Not Member Allows an individual port to be specified as a non-VLAN member. Click Apply to implement changes made. To search for a VLAN click the Find VLAN tab at the top of the screen which will display the following window, enter a VLAN ID and click Find to display the settings for a previously configured VLAN. Figure 3 - 9 802.1Q VLAN window – Find VLAN window To create a VLAN Batch entry click the VLAN B atch S ettings tab at the top of the screen which will display the following window.

78 Figure 3 - 10 802.1Q VLAN window – VLAN Batch Settings window The following fields can be set in the VLAN Batch Settings window: Parameter Description VID List (e.g 2-5) Enter a VLAN ID List that can be added, deleted or configured. Advertisement Enabling this function will allow the Switch to send out GVRP packets to outside sources, notifying that they may join the existing VLAN. Port List (e.g. 1-5) Allows an individual port list to be added or deleted as a member of the VLAN. Tagged Specifies the port as 802.1Q tagged. Checking the box will designate the port as Tagged. Untagged Specifies the port as 802.1Q untagged. Checking the box will designate the port as untagged. Forbidden Select this to specify the port as not being a member of the VLAN and that the port is forbidden from becoming a member of the VLAN dynamically. Click Apply to implement changes made.

79 Voice VLAN Voice VLAN is a VLAN used to carry voice traffic from IP phones. Because the sound quality of an IP phone call will be deteriorated if the data is unevenly sent, the quality of service (QoS) for voice traffic shall be configured to ensure the transmission priority of voice packet is higher than normal traffic. The switches determine whether a received packet is a voice packet by checking its source MAC address. If the source MAC addresses of packets comply with the organizationally unique identifier (OUI) addresses configured on the Switch, the packets are determined as voice packets and transmitted in voice VLAN. Figure 3 - 11 Application of Voice VLAN The above figure is an example of voice VLAN. An IP phone and a PC connect to a HUB, and the HUB connects to a switch that supports voice VLAN. The received untagged traffic by the switch can come from the IP phone or the PC. The switch checks the SA of the received untagged packets. If the SA is the IP phone address, the packet will be forwarded to voice VLAN. Otherwise, it will be forwarded to port-based VLAN, if no other VLAN types (e.g. subnet- based VLAN or protocol VLAN) are applied. NOTE: The Switch classifies voice VLAN packets based on OUI addresses only for received untagged packets. For tagged packets, the Switch will classify VLAN packets differently. Voice VLAN Global Settings This window allows you to configure the basic settings about voice VLAN To view this window click L2 Features > Voice VLAN > Voice VLAN Global Settings. Figure 3 - 12 Voice VLAN Global Settings window The following fields can be configured. Parameter Description Voice VLAN State Use the pull down menu to enable or disable the voice VLAN global settings.

80 Voice VLAN Name Click the radio button and enter a name for a voice VLAN. Voice VLAN ID (1-4094) Click the radio button and enter a VLAN ID for a voice VLAN. Priority Use the pull down menu to set the priority of the voice VLAN. The voice VLAN priority will be the priority associated with the voice VLAN traffic to distinguish the QoS of the voice traffic from data traffic. It’s range is 0 – 7, the default value is 5. Aging Time (1- 65535) Enter a period of time in minutes to remove a port from voice VLAN if the port is an automatic VLAN member. When the last voice device stops sending traffic and the MAC address of this voice device is aged out, the voice VLAN aging timer will be started. The port will be removed from the voice VLAN after expiration of voice VLAN aging timer. Trap / Log Use the pull down menu to enable or disable the trap/log state for voice VLAN. If there is a new voice device detected or a port join/leave the voice VLAN dynamically, and the trap/log is enabled, then a trap/log will be triggered. Voice VLAN Port Settings This window allows you to configure the voice VLAN port settings. To view this window click L2 Features > Voice VLAN > Voice VLAN Port Settings. Figure 3 - 13 Voice VLAN Port Settings window The following fields can be configured. Parameter Description From Port / To Port A consecutive group of ports that are part of the voice VLAN configuration starting with the selected port. State Use the pull down menu to enable or disable the voice VLAN function on the port.

81 Mode Select the mode between Auto and Manual. If the mode is Auto, the port may become the voice VLAN member port by auto-learning. If the MAC address of the the received packet matches the configured OUI (Organizationally Unique Identifier) addresses, the port will be learned as dynamic member port. The dynamic membership will be removed via the aging out mechanism. If the mode is Manual, the port needs to be manually added into or removed from the voice VLAN by 802.1Q VLAN configuration command. Voice VLAN OUI Settings This window allows the user to configiure the user-defined voice traffic’s OUI. There are some pre-defined OUIs and when the user configures personal OUI, these pre-defined OUIs must be avoided. Followins are the pre-defined voice traffic’s OUI: OUI Vendor Mnemonic Name 00:E0:BB 3COM 3com 00:03:6B Cisco cisco 00:E0:75 Veritel veritel 00:D0:1E Pingtel pingtel 00:01:E3 Siemens siemens 00:60:B9 NEC/ Philips nec&philips 00:0F:E2 Huawei-3COM huawei&3com 00:09:6E Avaya avaya To view this window click L2 Features > Voice VLAN > Voice VLAN OUI Settings. Figure 3 - 14 Voice VLAN OUI Settings window The following fields can be configured. Parameter Description OUI Address Enter a user-defined OUI MAC address Mask Enter the user-defined OUI MAC address mask. Description Enter the description for the user-defined OUI.

82 Subnet-based VLAN The Switches uses IP subnet-based VLAN claasification to group devices. Figure 3 - 15 Application of Subnet VLAN The above figure is an example of subnet-based VLAN. The IP address of customer A is 172.18.0.1 and IP address of customer B is 172.18.0.2. Both of them connect to the same port of the Switch through a HUB. Customers can access Internet through VLAN 10 and the local server through VLAN 20. However, with the subnet VLAN configuration in the example, IP 172.18.0.1 is assigned to VLAN 10 and 172.18.0.2 is assigned to VLAN 20. Customer A can only access Internet, and customer B can only access the local server.

83 Subnet-based VLAN Settings The subnet-based VLAN settings are used to create, find or delete a subnet-based VLAN entry. A subnet-based VLAN entry is an IP subnet-based VLAN classification rule. If an untagged or priority-tagged IP packet is received on a port, its source IP address will be used to match the subnet-based VLAN entries. If the source IP is in the subnet of an entry, the packet will be classified to the VLAN defined for this subnet. To view this window, click L2 Features > Subnet VLAN > Subnet VLAN Settings as shown below: Figure 3 - 16 Subnet VLAN Settings window The following parameters can be configured: Parameter Description VLAN Name The VLAN Name to be associated with the subnet. VLAN ID The VLAN ID to be associated with the subnet. Priority The priority to be associated with the subnet. Its range is 0-7. IPv4 Network Address Is used to specify an IPv4 network address. The format is ipaddress/prefix length. The prefix length of the IPv4 network address cannot be greater than 64. Enter the appropriate information and click Add to create a new entry. To search for a particular entry enter the appropriate information and click Find. To remove an entry click Delete. To view all entries on the Switch click Show All. To remove all entries click Delete All.

84 VLAN Precedence Settings The VLAN precedence settings are used to configure VLAN classification precedence on each port. You can specify the order of MAC-based VLAN classifications and subnet-based VLAN classifications. If a port’s VLAN classificataion is a MAC-based precedence, MAC-based VLAN classification will be processed first. If MAC-based VLAN classification fails, the subnet-based VLAN classification will be executed. If a port’s VLAN classification is subnet- based VLAN precedence, the subnet-based VLAN classification will be processed first. If subnet-based VLAN classification fails, the MAC-based VLAN classification will be executed. To view this window, click L2 Features > Subnet VLAN > VLAN Precedence Settings as shown below: Figure 3 - 17 VLAN Precedence Settings window The following parameters can be configured: Parameter Description From Port…To Port Specify the port or range of ports you wish to configure. VLAN Precedence Use the drop down menu to select the VLAN precedence, choose either MAC Based VLAN or Subnet VLAN. MAC Based VLAN – Specifies that the MAC-based VLAN classification is given precedence over the subnet-based VLAN classification. Subnet VLAN – Specifies that the subnet-based VLAN classification is given precedence over the MAC-based VLAN classification. Click Apply to implement changes made.

85 Q-in-Q Q-in-Q Settings This function allows the user to enable or disable the Q-in-Q function. Q-in-Q is designed for service providers to carry traffic from multiple users across a network. Q-in-Q is used to maintain customer specific VLAN and Layer 2 protocol configurations even when the same VLAN ID is being used by different customers. This is achieved by inserting SPVLAN tags into the customer’s frames when they enter the service provider’s network, and then removing the tags when the frames leave the network. Customers of a service provider may have different or specific requirements regarding their internal VLAN IDs and the number of VLANs that can be supported. Therefore customers in the same service provider network may have VLAN ranges that overlap, which might cause traffic to become mixed up. So assigning a unique range of VLAN IDs to each customer might cause restrictions on some of their configurations requiring intense processing of VLAN mapping tables which may exceed the VLAN mapping limit. Q-in-Q uses a single service provider VLAN (SPVLAN) for customers who have multiple VLANs. Customer’s VLAN IDs are segregated within the service provider’s network even when they use the same customer specific VLAN ID. Q-in-Q expands the VLAN space available while preserving the customer’s original tagged packets and adding SPVLAN tags to each new frame. To view this window click L2 Features > QinQ > QinQ Settings Figure 3 - 18 QinQ Settings window The following fields can be set: Parameter Description QinQ Global Settings Click the radio button to enable or disable the Q-in-Q Global Settings. Inner TPID This is used to decide if the ingress packet is c-tagged. Inner tag TPID is per system configurable.

86 From Port / To Port A consecutive group of ports that are part of the VLAN configuration starting with the selected port. Role The user can choose between UNI or NNI role. UNI – To select a user-network interface which specifies that communication between the specified user and a specified network will occur. NNI – To select a network-to-network interface specifies that communication between two specified networks will occur. Missdrop Use the drop down menu to enable or disable missdrop. If missdrop is enabled, the packet that does not match any assignment rule in the Q-in-Q profile will be dropped. If disabled, then the packet will be assigned to the PVID of the received port. Outer TPID The Outer TPID is used for learning and switching packets. The Outer TPID constructs and inserts the outer tag into the packet based on the VLAN ID and Inner Priority. Use Inner Priority This is the priority given to the inner tag that is copied to the outer tag if this setting is enabled. Add Inner Tag (hex: 0x1-0xffff) Deselect Disabled and enter an inner tag for the packet to use. Click Apply to implement changes. VLAN Translation Settings VLAN translation translates the VLAN ID carried in the data packets it receives from private networks into those used in the Service Providers network. To view this window click L2 Features > QinQ > VLAN Translation Settings Figure 3 - 19 VLAN Translation Settings window The following fields can be set: Parameter Description From Port / To Port A consecutive group of ports that are part of the VLAN configuration starting with the selected port. CVID (1-4094) The customer VLAN ID List to which the tagged packets will be added. Action Specify if you want SPVID packets to be added or replaced. SPVID(1-4094) This configures the VLAN to join the Service Providers VLAN as a tagged member. Priority (0-7) Select a priority for the VLAN ranging from 0-7. With 7 having the highest priority. Click Apply to make a new entry and Delete All to remove a VLAN Translation entry.

87 Q-in-Q and VLAN Translation Rules For ingress untagged packets at UNI ports: 1. The Switch does not reference the VLAN translation table. 2. Check the switch VLAN tables. The sequence is MAC-based VLAN -> subnet-based VLAN -> protocol-based VLAN -> port-based VLAN. If matched, the matched VLAN will become this packet’s ‘SPVLAN’. For ingress tagged packets at UNI ports: 1. The Switch looks up the VLAN translation table. If matched, the VLAN tag will be translated (replace CEVLAN with SPVLAN, or add SPVLAN). 2. Or, check the switch VLAN tables. The sequence is the same as above. The matched VLAN becomes this packet’s ‘SPVLAN’. 802.1v Protocol VLAN 802.1v Protocol Group Settings The table allows the user to create Protocol VLAN groups and add protocols to that group. The 802.1v Protocol VLAN Group Settings supports multiple VLANs for each protocol and allows the user to configure the untagged ports of different protocols on the same physical port. For example it allows the user to configure an 802.1Q and 802.1v untagged port on the same physical port. The lower half of the table displays any previously created groups. To view this window click L2 Features > 802.1v Protocol VLAN > 802.1v Protocol Group Settings Figure 3 - 20 802.1v Protocol Group Settings window The following fields can be set: Parameter Description Group ID Select an ID number for the group, between 1 and 16. Group Name This is used to identify the new Protocol VLAN group. Type an alphanumeric string of up to 32 characters. Protocol This function maps packets to protocol-defined VLANs by examining the type octet within the packet header to discover the type of protocol associated with it. Use the drop-down menu to toggle between Ethernet_II, IEEE802.3_LLC and IEEE802.3_SNAP. Protocol Value (0-FFFF) Enter a value for the Group. Click Add to make a new entry and Delete All to remove an entry.

88 802.1v Protocol VLAN Settings The table allows the user to configure Protocol VLAN settings. The lower half of the table displays any previously created settings. To view this window click L2 Features > 802.1v Protocol VLAN > 802.1v Protocol VLAN Settings Figure 3 - 21 Protocol VLAN Settings window The following fields can be set: Parameter Description Group ID Click the corresponding radio button to select a previously configured Group ID from the drop- down menu. Group Name Click the corresponding radio button to select a previously configured Group Name from the drop-down menu. VID (1-4094) Click the radio button to enter the VID. This is the VLAN ID that, along with the VLAN Name, identifies the VLAN the user wishes to create. VLAN Name Click the radio button to enter a VLAN Name. This is the VLAN Name that, along with the VLAN ID, identifies the VLAN the user wishes to create. 802.1p Priority This parameter is specified if you want to re-write the 802.1p default priority previously set in the Switch, which is used to determine the CoS queue to which packets are forwarded to. Once this field is specified, packets accepted by the Switch that match this priority are forwarded to the CoS queue specified previously by the user. Click the corresponding box if you want to set the 802.1p default priority of a packet to the value entered in the Priority (0-7) field, which meets the criteria specified previously in this command, before forwarding it on to the specified CoS queue. Otherwise, a packet will have its incoming 802.1p user priority re-written to its original value before being forwarded by the Switch. For more information on priority queues, CoS queues and mapping for 802.1p, see the QoS section of this manual. Port List (e.g.: 1-6) Select the specified ports you wish to configure by entering the port number in this field, or check the Select All Ports box. Search Port List This function allows the user to search all previously configured port list settings and display them on the lower half of the table. To search for a port list, enter the port number you wish to view and click Find. To display all previously configured port lists on the bottom half of the screen click the Show All button. To clear all previously configured lists click the Delete All button.

89 RSPAN Settings This table controls the RSPAN function. The purpose of the RSPAN function is to mirror the packets to a remote switch. The packet travels from the switch where the monitored packet is received, through the intermediate switch, then to the switch where the sniffer is attached. The first switch is also named the source switch. RSPAN VLAN mirroring will only work when RSPAN Global Settings are enabled. RSPAN redirect function will work when RSPAN is enabled and at least one RSPAN VLAN has been configured with redirect ports. To view this window, click L2 Features > RSPAN Settings as shown below: Figure 3 - 22 RSPAN Settings window Enter the VLAN Name or VID and click Create. To remove an entry click Delete, to modify an entry click the corresponding Edit button. Figure 3 - 23 RSPAN Settings window – Edit The following fields can be set: Parameter Description Source Po rts(e.g.: 1-4) Select the specified ports you wish to configure by entering the port number in this field. Rx, Tx, or Both can be selected from the dop down menu. Redirect Port Use the dop donw menu to specify the ouptut port for the RSPAN VLAN packets. Tick to Add or Delete in the Source Ports or Redirect Ports and click Apply to add or remove the information. To return to the RSPAN Settings window click <

90 GVRP Settings The GARP VLAN Registration Protocol (GVRP) is a mechanism that dynamically maintain VLAN information on the Switch, share the information to other GVRP-enabled switches and update switch information for other modules such as interface. The table allows the user to determine whether the Switch will share its VLAN configuration information with other GVRP-enabled switches. In addition, Ingress Checking can be used to limit packet forwarding. When the received port is not one of the packet’s VID specified VLAN, the packet will be dropped. Results can be seen in the table under the configuration settings, as seen below. To view this window click L2 Features > GVRP Settings Figure 3 - 24 GVRP Settings window The following fields can be set: Parameter Description GVRP Global Settings Click the radio buttons to enable or disable the GVRP global settings. From Port/To Port These two fields allow you to specify the range of ports that will be included in the Port-based VLAN that you are creating using the 802.1Q Port Settings window. PVID The read-only field in the 802.1Q Port Table shows the current PVID assignment for each port, which may be manually assigned to a VLAN when created in the 802.1Q Port Settings table. The Switch's default is to assign all ports to the default VLAN with a VID of 1. The PVID is used by the port to tag outgoing, untagged packets, and to make filtering decisions about incoming packets. If the port is specified to accept only tagged frames - as tagging, and an untagged packet is forwarded to the port for transmission, the port will add an 802.1Q tag using the PVID to write the VID in the tag. When the packet arrives at its destination, the receiving device will use the PVID to make VLAN forwarding decisions. If the port receives a packet, and Ingress filtering is enabled, the port will compare the VID of the incoming packet to its PVID. If the two are unequal, the port will drop the packet. If the two are equal, the port will receive the packet. GVRP The Group VLAN Registration Protocol (GVRP) enables the port to dynamically become a member of a VLAN. GVRP is Disabled by default.

91 Ingress Checking This field can be toggled using the space bar between Enabled and Disabled. Enabled enables the port to compare the VID tag of an incoming packet with the PVID number assigned to the port. If the two are different, the port filters (drops) the packet. Disabled disables ingress filtering. Ingress Checking is Disabled by default. Acceptable Frame Type This field denotes the type of frame that will be accepted by the port. The user may choose between Tagged Only, which means only VLAN tagged frames will be accepted, and Admit_All, which mean both tagged and untagged frames will be accepted. Admit_All is enabled by default. Click Apply to implement changes made. GVRP Timer Settings The GVRP allows interoperability with other switches, so the values of the GVRP timers can be configured. This table is used to set the GVRP Timer Settings. To view this window click L2 Features > GVRP Timer Settings Figure 3 - 25 GVRP Timer Settings window The following fields can be set: Parameter Description Join Time (100-100000) The time in milliseconds that specifies the amount of time between the Switch receiving the information about becoming a member of the group and actually joining the group. The default is 200. Leave Time (100-100000) The time in milliseconds that specifies the maximum amount of time between the Switch receiving a leave group message from a host, and the Switch issuing a group membership query. The default is 600. The Leave Time must be greater than 2 join times. Leave All Time (100-100000) The time in milliseconds that specifies the amount of time the Switch will take to Leave All groups. The default is 10000. The Leave All Time must be greater than the Leave Time. Click Apply to implement changes made. Asymmetric VLAN Settings Shared VLAN Learning is a primary example of the requirement for Asymmetric VLANs. Under normal circumstances, a pair of devices communicating in a VLAN environment will both send and receive using the same VLAN; however, there are some circumstances in which it is convenient to make use of two distinct VLANs, one used for A to transmit to B and the other used for B to transmit to A in these cases Asymmetric VLANs are needed. An example of when this type of configuration might be required, would be if the client was on a distinct IP subnet, or if there was some confidentiality-related need to segregate traffic between the clients. To view this window click L2 Features > Asymmetric VLAN Settings

92 Figure 3 - 26 Asymmetric VLAN Settings window Click Apply to implement changes. MAC-based VLAN Settings This table is used to create MAC-based VLAN entries on the switch. A MAC Address can be mapped to any existing static VLAN and multiple MAC addresses can be mapped to the same VLAN. When a static MAC-based VLAN entry is created for a user, the traffic from this user is able to be serviced under the specified VLAN regardless of the authentiucation function operated on the port. Therefore each entry specifies a relationship of a source MAC address with a VLAN. To view this window click L2 Features > MAC-based VLAN Settings Figure 3 - 27 MAC_based VLAN Settings window The following fields can be set Parameter Description MAC Address Specify the MAC address to be reauthenticated by entering it into the MAC Address field. VID (1-4094) / VLAN Name Enter the VID or VLAN name of a previously configured VLAN. Click Find, Add or Delete All for changes to take affect. PVID Auto Assign Settings This commands Enables or Disables PVID Auto Assign on the Switch. PVID is the VLAN that the switch will use for forwarding and filtering purposes. If PVID Auto-Assign is Enabled, PVID will be possibly changed by previously set PVID or VLAN configurations. When a user configures a port to VLAN X’s untagged membership, this port’s PVID will be updated with VLAN X. In the form of a VLAN list command, PVID is updated with the last item on the VLAN list. When a user removes a port from the untagged membership of the PVID’s VLAN, the port’s PVID will be assigned to a default VLAN. When PVID Auto Assign is Disabled, PVID can only be changed by PVID configuration (user changes explicitly). The VLAN configuration will not automatically change the PVID. The default setting is Enabled. To view this window click L2 Features > PVID Auto Assign Settings Figure 3 - 28 PVID Auto Assign Settings window

93 VLAN Trunk Settings This window allows the user to configure the VLAN trunk on the port of the Switch. When the VLAN trunk function is enabled, the VLAN trunk ports shall be able to forward all tagged frames with any VID. To view this window click L2 Features > VLAN Trunk Settings Figure 3 - 29 VLAN Trunk Settings window The following fields can be set: Parameter Description VLAN Trunk Global State Click the radio buttons to enable or disable the VLAN Trunk global state settings. VLAN Trunk Settings Tick to specify a port or range of ports to add to the VLAN trunk port members. When the port belongs to the VLAN trunk port, all tagged frames shall be able to pass through the ports.

94 Port Trunking Understanding Port Trunk Groups Port trunk groups are used to combine a number of ports together to make a single high-bandwidth data pipeline. DES-3528/DES-3552 Series supports up to 8 port trunk groups with 2 to 8 ports in each group. A potential bit rate of 4400 Mbps can be achieved. Figure 3 - 30 Example of Port Trunk Group The Switch treats all ports in a trunk group as a single port. Data transmitted to a specific host (destination address) will always be transmitted over the same port in a trunk group. This allows packets in a data stream to arrive in the same order they were sent. NOTE: If any ports within the trunk group become disconnected, packets intended for the disconnected port will be load shared among the other unlinked ports of the link aggregation group. Link aggregation allows several ports to be grouped together and to act as a single link. This gives a bandwidth that is a multiple of a single link's bandwidth. Link aggregation is most commonly used to link a bandwidth intensive network device or devices, such as a server, to the backbone of a network. The Switch allows the creation of up to 8 link aggregation groups, each group consisting of 2 to 8 links (ports). The aggregated links must be contiguous (they must have sequential port numbers) except the four (optional) Gigabit

95 ports, which can only belong to a single link aggregation group. All of the ports in the group must be members of the same VLAN, and their STP status, static multicast, traffic control; traffic segmentation and 802.1p default priority configurations must be identical. Port locking, port mirroring and 802.1X must not be enabled on the trunk group. Further, the aggregated links must all be of the same speed and should be configured as full duplex. The Master Port of the group is to be configured by the user, and all configuration options, including the VLAN configuration that can be applied to the Master Port, are applied to the entire link aggregation group. Load balancing is automatically applied to the ports in the aggregated group, and a link failure within the group causes the network traffic to be directed to the remaining links in the group. The Spanning Tree Protocol will treat a link aggregation group as a single link, on the switch level. On the port level, the STP will use the port parameters of the Master Port in the calculation of port cost and in determining the state of the link aggregation group. If two redundant link aggregation groups are configured on the Switch, STP will block one entire group; in the same way STP will block a single port that has a redundant link. To view the Trunking Settings window click L2 Features > Port Trunking Figure 3 - 31 Port Trunking window The following fields can be set Parameter Description Algorithm The algorithm that the Switch uses to balance the load across the ports that make up the port trunk group is defined by this definition. Choose MAC Source, MAC Destination, MAC Source Dest, IP Source, IP Destination or IP Source Dest (See the Link Aggregation section of this manual). Group ID Select an ID number for the group, between 1 and 8. Type This pull-down menu allows you to select between Static and LACP (Link Aggregation Control Protocol). LACP allows for the automatic detection of links in a Port Trunking Group. Master Port Choose the Master Port for the trunk group using the pull-down menu. State Trunk groups can be toggled between Enabled and Disabled. This is used to turn a port trunking group on or off. This is useful for diagnostics, to quickly isolate a bandwidth intensive network device or to have an absolute backup aggregation group that is not under automatic control. Active Port Shows the port that is currently forwarding packets. Member Ports Choose the members of a trunked group. Up to eight ports per group can be assigned to a group. Flooding Port A trunking group must designate one port to allow transmission of broadcasts and unknown unicasts. Click Apply to implement changes made.

96 LACP Port Settings The LACP Port Settings window is used to create port trunking groups on the Switch. Using the following window, the user may set which ports will be active and passive in processing and sending LACP control frames. To view the Trunking Settings window click L2 Features > LACP Port Settings Figure 3 - 32 LACP Port Settings window The following fields can be set Parameter Description From Port / To Port A consecutive group of ports may be configured starting with the selected port. Activity Active - Active LACP ports are capable of processing and sending LACP control frames. This allows LACP compliant devices to negotiate the aggregated link so the group may be changed dynamically as needs require. In order to utilize the ability to change an aggregated port group, that is, to add or subtract ports from the group, at least one of the participating devices must designate LACP ports as active. Both devices must support LACP. Passive - LACP ports that are designated as passive cannot initially send LACP control frames. In order to allow the linked port group to negotiate adjustments and make changes dynamically, one end of the connection must have "active" LACP ports (see above). Click Apply to implement changes made.

97 Traffic Segmentation Traffic segmentation is used to limit traffic flow from a single port to a group of ports on either a single switch or a group of ports on another switch in a switch stack. This method of segmenting the flow of traffic is similar to using VLANs to limit traffic, but is more restrictive. It provides a method of directing traffic that does not increase the overhead of the Master switch CPU. This page allows you to view which port on a given switch will be allowed to forward packets to other ports on that switch. Select a port number from the drop down menu to display the forwarding ports. To configure new forwarding ports for a particular port, select a port from the menu and click Apply. To view the Traffic Segmentation window click L2 Features > Traffic Segmentation Figure 7- 1. Traffic Segmentation window The following fields can be set Parameter Description From Port / To Port Check the corresponding boxes for the port(s) to transmit packets. Forward Portlist Check the boxes to select which of the ports on the Switch will be able to forward packets. These ports will be allowed to receive packets from the port specified above. Clicking the Apply button will enter the combination of transmitting port and allowed receiving ports into the Switch's Current Traffic Segmentation Table.

98 IGMP Snooping Internet Group Management Protocol (IGMP) snooping allows the Switch to recognize IGMP queries and reports sent between network stations or devices and an IGMP host. When enabled for IGMP snooping, the Switch can add or remove a port to a specific device based on IGMP messages passing through the Switch. In order to use IGMP Snooping it must first be enabled for the entire Switch (see the DES-3528/DES-3552 S eries Web Management Tool). You may then fine-tune the settings for each VLAN using the IGMP Snooping link in the L2 Features folder. When enabled for IGMP snooping, the Switch can open or close a port to a specific multicast group member based on IGMP messages sent from the device to the IGMP host or vice versa. The Switch monitors IGMP messages and discontinues forwarding multicast packets when there are no longer hosts requesting that they continue. IGMP Snooping Settings Use the IGMP Snooping Settings window to enable or disable IGMP Snooping on the Switch. To modify the settings, click the Edit button under Parameter Settings and a new table will appear for the user to configure. To view this window, click L2 Features > IGMP Snooping > IGMP Snooping Settings as shown below: Figure 3 - 33 IGMP Snooping Settings window Clicking the Edit button will open the IGMP Snooping Parameters Settings window, shown below: Figure 3 - 34 IGMP Snooping Parameters Settings - Edit window

99 The following fields can be set. Parameter Description VLAN ID This is the VLAN ID that, along with the VLAN Name, identifies the VLAN for which the user wishes to modify the IGMP Snooping Settings. VLAN Name This is the VLAN Name that, along with the VLAN ID, identifies the VLAN for which the user wishes to modify the IGMP Snooping Settings. Rate Limit Displays the rate limitation. Querier IP The querier IP address to send IGMP queries. Querier Expiry Time Displays the querier expiry time. Query Interval (1-65535) The Query Interval field is used to set the time (in seconds) between transmitting IGMP queries. Entries between 1 and 65535 seconds are allowed. Default = 125. Max Response Time (1-25) This determines the maximum amount of time in seconds allowed before sending an IGMP response report. The Max Response Time field allows an entry between 1 and 25 (seconds). Default = 10. Robustness Value (1-255) Adjust this variable according to expected packet loss. If packet loss on the VLAN is expected to be high, the Robustness Variable should be increased to accommodate increased packet loss. This entry field allows an entry of 1 to 255. Default = 2. Last Member Query Interval (1-25 Sec) This field specifies the maximum amount of time between group-specific query messages, including those sent in response to leave group messages. Default = 1. Data Driven Group Expiry Time (1- 65535) Allows the user to set the time that an IGMP Snooping data driven learning group will expire for the specified VLAN. Default = 260. Querier State Choose Enabled to enable transmitting IGMP Query packets or Disabled to disable. The default is Enabled. Fast Leave This parameter allows the user to enable the Fast Leave function. Enabled, this function will allow members of a multicast group to leave the group immediately (without the implementation of the Last Member Query Timer) when an IGMP Leave Report Packet is received by the Switch. The default is Disabled. State Select Enabled to implement IGMP Snooping. This field is Disabled by default. Report Suppression Select Enabled or Disabled for IGMP Snooping report suppression for specified VLANs. Data Driven Learning State Allows users to enable or disable IGMP snooping data driven learning for the specified VLAN. Data Driven Learning Aged Out Allows users to enable or disable aged out of IGMP Snooping data driven learning for the specified VLAN. Version Allows the user to configure the IGMP version used on the Switch. The default value is 3. Querier Role This read-only field describes the behavior of the router for sending query packets. Querier will denote that the router is sending out IGMP query packets. Non-Querier will denote that the router is not sending out IGMP query packets. This field will only read Querier when the Querier State and the State fields have been Enabled. To modify the IGMP Snooping Router IP Settings click on the hyperlinked Browse Router IP which will show the following window for the user to configure: