3Com SuperStack 3 NBX Getting Started Manual

Published July 2005 SuperStack® 3 Switch 4200 Family Getting Started Guide Switch 4200 26-Port (3C17300A) Switch 4200 50-Port (3C17302A) Switch 4200 28-Port (3C17304A) DUA1730-0AAA03.book Page 1 Thursday, November 17, 2005 12:17 PM

Marlborough, MA 01752-3064 Copyright © 2002, 2005 3Com Corporation. All rights reserved. No part of this documentation may be reproduced in any form or by any means or used to make any derivative work (such as translation, transformation, or adaptation) without written permission from 3Com Technologies. 3Com Corporation reserves the right to revise this documentation and to make changes in content from time to time without obligation on the part of 3Com Technologies to provide notification of such revision or change. 3Com Corporation provides this documentation without warranty, term, or condition of any kind, either implied or expressed, including, but not limited to, the implied warranties, terms or conditions of merchantability, satisfactory quality, and fitness for a particular purpose. 3Com may make improvements or changes in the product(s) and/or the program(s) described in this documentation at any time. If there is any software on removable media described in this documentation, it is furnished under a license agreement included with the product as a separate document, in the hard copy documentation, or on the removable media in a directory file named LICENSE.TXT or !LICENSE.TXT. If you are unable to locate a copy, please contact 3Com and a copy will be provided to you. UNITED STATES GOVERNMENT LEGEND If you are a United States government agency, then this documentation and the software described herein are provided to you subject to the following: All technical data and computer software are commercial in nature and developed solely at private expense. Software is delivered as “Commercial Computer Software” as defined in DFARS 252.227-7014 (June 1995) or as a “commercial item” as defined in FAR 2.101(a) and as such is provided with only such rights as are provided in 3Com’s standard commercial license for the Software. Technical data is provided with limited rights only as provided in DFAR 252.227-7015 (Nov 1995) or FAR 52.227-14 (June 1987), whichever is applicable. You agree not to remove or deface any portion of any legend provided on any licensed program or documentation contained in, or delivered to you in conjunction with, this User Guide. Unless otherwise indicated, 3Com registered trademarks are registered in the United States and may or may not be registered in other countries. 3Com, the 3Com logo and SuperStack are all registered trademarks of 3Com Corporation. Novell and NetWare are registered trademarks of Novell Incorporated. Adobe and Acrobat are registered trademarks of Adobe Systems Incorporated. All other company and product names may be trademarks of the respective companies with which they are associated. Environmental Statement It is a 3Com policy to be environmentally friendly in all operations. This manual is printed on paper that comes from sustainable, managed European forests. The production process for making the pulp has a reduced AOX level (adsorbable organic halogen) resulting in elemental chlorine-free paper. The paper is fully biodegradable and recyclable. DUA1730-0AAA03.book Page 2 Thursday, November 17, 2005 12:17 PM

Conventions 8 Related Documentation 9 Accessing Online Documentation 10 Documentation Comments 10 1 INTRODUCING THE SUPERSTACK 3 SWITCH 4200 FAMILY About the Switch 4200 Family 12 Summary of Hardware Features 12 Switch 4200 Family — Front View Detail 13 10BASE-T/ 100BASE-TX Ports 14 10/100/1000BASE-T Ports 14 SFP Ports 14 LEDs 15 Switch 4200 Family — Rear View Detail 16 Power Socket 16 Console Port 16 Default Settings 17 2 INSTALLING THE SWITCH Package Contents 20 Choosing a Suitable Site 20 Rack-mounting 21 Placing Units On Top of Each Other 23 Stacking Units 23 The Power-up Sequence 24 Powering-up the Switch 4200 Family 24 Checking for Correct Operation of LEDs 24 SFP Operation 25 DUA1730-0AAA03.book Page 3 Thursday, November 17, 2005 12:17 PM

Inserting an SFP Transceiver 26 Removing an SFP Transceiver 27 Choosing the Correct Cables 27 Choosing the Correct Fiber Cables 28 3 SETTING UP FOR MANAGEMENT Setting Up Overview 32 IP Configuration 33 Preparing for Management 34 Manually Configuring IP Information 35 Connecting to a Front Panel Port 35 Connecting to the Console Port 38 Viewing Automatically Configured IP Information 42 Using 3Com Network Supervisor 42 Connecting to the Console Port 42 Methods of Managing a Switch 45 Command Line Interface Management 45 Web Interface Management 46 SNMP Management 46 Setting Up Command Line Interface Management 47 CLI Management via the Console Port 47 CLI Management over the Network 47 Setting Up Web Interface Management 48 Pre-requisites 48 Web Management Over the Network 49 Setting Up SNMP Management 49 Pre-requisites 50 Default Users and Passwords 50 Changing Default Passwords 51 4 PROBLEM SOLVING Solving Problems Indicated by LEDs 54 Solving Hardware Problems 54 Solving Communication Problems 55 Solving Stack Formation Problems 56 Solving Software Upgrade Problems 56 DUA1730-0AAA03.book Page 4 Thursday, November 17, 2005 12:17 PM

L’information de Sécurité Importante 60 Wichtige Sicherheitsinformationen 62 Información de seguridad importante 64 Importanti informazioni di sicurezza 66 B PIN-OUTS Null Modem Cable 69 PC-AT Serial Cable 69 Modem Cable 70 RJ-45 Pin Assignments 70 C TECHNICAL SPECIFICATIONS Switch 4200 26-Port (3C17300A) 73 Switch 4200 50-Port (3C17302A) 74 Switch 4200 28-Port (3C17304A) 75 D OBTAINING SUPPORT FOR YOUR PRODUCT Register Your Product 77 Purchase Value-Added Services 77 Troubleshoot Online 78 Access Software Downloads 78 Telephone Technical Support and Repair 78 Contact Us 79 REGULATORY NOTICES INDEX DUA1730-0AAA03.book Page 5 Thursday, November 17, 2005 12:17 PM

This guide provides all the information you need to install and use a SuperStack® 3 Switch 4200 in its default state. This guide is intended for use with the following Switch 4200 Family models: ■ Switch 4200 26-Port (3C17300A) — 24 10BASE-T/100BASE-TX ports, 2 10/100/1000BASE-T ports ■ Switch 4200 50-Port (3C17302A) — 48 10BASE-T/100BASE-TX ports, 2 10/100/1000BASE-T ports ■ Switch 4200 28-Port (3C17304A) — 24 10BASE-T/100BASE-TX ports, 2 10/100/1000BASE-T ports and 2 SFP ports All procedures described in this guide apply to all models except where stated. For details on the Switch 4226T (3C17300), Switch 4250T (3C17302) and Switch 4228G (3C17304), refer to the following document: ■ SuperStack 3 Switch 4200 Family Getting Started Guide (part number DUA1730-0AAA04) available for download from the 3Com Web site, www.3Com.com. The guide is intended for use by network administrators who are responsible for installing and setting up network equipment; consequently, it assumes a basic working knowledge of LANs (Local Area Networks). If the information in the release notes that are shipped with your product differ from the information in this guide, follow the instructions in the release notes. DUA1730-0AAA03.book Page 7 Thursday, November 17, 2005 12:17 PM

Most user guides and release notes are available in Adobe Acrobat Reader Portable Document Format (PDF) or HTML on the 3Com World Wide Web site: http://www.3com.com/ Conventions Table 1 and Table 2 list conventions that are used throughout this guide. Table 1 Notice Icons Icon Notice Type Description Information note Information that describes important features or instructions Caution Information that alerts you to potential loss of data or potential damage to an application, system, or device Warning Information that alerts you to potential personal injury Table 2 Text Conventions Convention Description Screen displays This typeface represents information as it appears on the screen. Syntax The word “syntax” means that you must evaluate the syntax provided and then supply the appropriate values for the placeholders that appear in angle brackets. Example: To change your password, use the following syntax: system password In this example, you must supply a password for . Commands The word “command” means that you must enter the command exactly as shown and then press Return or Enter. Commands appear in bold. Example: To display port information, enter the following command: bridge port detail The words “enter” and “type” When you see the word “enter” in this guide, you must type something, and then press Return or Enter. Do not press Return or Enter when an instruction simply says “type.” Keyboard key names If you must press two or more keys simultaneously, the key names are linked with a plus sign (+). Example: Press Ctrl+Alt+Del DUA1730-0AAA03.book Page 8 Thursday, November 17, 2005 12:17 PM

following: ■ SuperStack 3 Switch Implementation Guide This guide contains information on the features supported by your Switch and how they can be used to optimize your network. It is supplied in PDF format on the CD-ROM that accompanies the Switch. ■ SuperStack 3 Switch Management Quick Reference Guide This guide contains: ■ a list of the software features supported by the Switch. ■ a summary of the web interface and command line interface commands for the Switch. ■ SuperStack 3 Switch Management Interface Reference Guide This guide provides detailed information about the web interface and command line interface that enable you to manage the Switch. It is supplied in HTML format on the CD-ROM that accompanies the Switch. ■ Release Notes These notes provide information about the current software release, including new features, modifications, and known problems. Words in italics Italics are used to: ■ Emphasize a point. ■ Denote a new term at the place where it is defined in the text. ■ Identify menu names, menu commands, and software button names. Examples: From the Help menu, select Contents. Click OK. Table 2 Text Conventions (continued) Convention Description DUA1730-0AAA03.book Page 9 Thursday, November 17, 2005 12:17 PM

There are other publications you may find useful, such as: ■ Documentation accompanying 3Com Network Supervisor. You can download 3Com Network Supervisor and supporting documentation from the 3Com Web site at: www.3com.com/3ns Accessing Online Documentation The CD-ROM supplied with your Switch contains the following online documentation: ■ SuperStack 3 Switch Management Quick Reference Guide (PDF format) ■ SuperStack 3 Switch Implementation Guide (PDF format) ■ SuperStack 3 Switch Management Interface Reference Guide (HTML format) 1 To access the documentation insert the CD-ROM into your CD-ROM drive. If your PC has auto-run enabled, a splash screen will be displayed automatically. 2 Select the Documentation section from the contents page. If the online documentation is to be accessed from a local drive or server, you will need to access the CD-ROM contents via the root directory and copy the files from the CD-ROM to a suitable directory. ■ The HTML Reference Guide is stored in the Docs/reference directory on the CD-ROM. The documentation is accessed using the index.htm file. ■ The PDF Quick Reference Guide and PDF Implementation Guide are stored in the Docs/implementation directory of the CD-ROM. 3Com recommends that you copy the Docs/reference directory as a whole to maintain the structure of the files. DUA1730-0AAA03.book Page 10 Thursday, November 17, 2005 12:17 PM

FAMILY This chapter contains introductory information about the Switch 4200 Family and how it can be used in your network. It covers summaries of hardware and software features and also the following topics: ■ About the Switch 4200 Family ■ Switch 4200 Family — Front View Detail ■ Switch 4200 Family — Rear View Detail ■ Default Settings This Getting Started Guide describes the following units in the Switch 4200 Family: ■ Switch 26-Port (3C17300A) ■ Switch 50-Port (3C17302A) ■ Switch 28-Port (3C17304A) For details on the Switch 4226T (3C17300), Switch 4250T (3C17302) and Switch 4228G (3C17304), refer to the following document: ■ SuperStack 3 Switch 4200 Family Getting Started Guide (part number DUA1730-0AAA04) available for download from the 3Com Web site, www.3Com.com. DUA1730-0AAA03.book Page 11 Thursday, November 17, 2005 12:17 PM

About the Switch 4200 Family The Switch 4200 Family are stackable 10/100/1000 Mbps devices which consist of: ■ 24 or 48 10BASE-T/100BASE-TX ports ■ 2 10/100/1000BASE-T ports ■ 2 SFP ports (Switch 4200 28-Port only) The Switch provides high-performance workgroups with a backbone to server connection. You can also add the Switch 4200 Family to any SuperStack® system as your network grows. Summary of Hardware Features Table 3 summarizes the hardware features that are supported by the Switch 4200 Family. Table 3 Hardware features Feature Switch 4200 Family Addresses ■ Up to 8000 supported ■ Up to 64 permanent entries Auto-negotiation ■ Supported on all ports ■ Auto MDI/MDI-X Forwarding Modes Store and Forward Duplex Modes Half and full duplex on all 10/100 ports. Full duplex on 1000BASE-T ports and full duplex on SFP ports Flow Control In full duplex operation all ports are supported Smart Auto-sensing Supported on all ports except SFP ports which are single speed ports. Traffic Prioritization Supported (IEEE 802.ID): 2 queues per port Ethernet and Fast Ethernet Ports Auto-negotiating 10BASE-T/100BASE-TX ports Gigabit Ethernet Auto-negotiating 10/100/1000BASE-T ports SFP Gigabit Ethernet Ports Supports fiber Gigabit Ethernet short-wave (SX), long-wave (LX), long-haul (LH70) and copper (T) transceivers in any combination (Switch 4200 28-Port only) Mounting 19-inch rack or stand-alone mounting DUA1730-0AAA03.book Page 12 Thursday, November 17, 2005 12:17 PM

13 Switch 4200 Family — Front View Detail Figure 1 Switch 4200 26-Port (3C17300A) — front view Figure 2 Switch 4200 50-Port (3C17302A) — front view Figure 3 Switch 4200 28-Port (3C17304A) — front view 3C17300A Superstack 3 Switch 4200 26-Port 10BASE-T / 100BASE-TX RJ-45 Ports Power/ Self Test Alert Alert LED 21 9 10 22 11 23 12 24 8 20 1 13 19 7 18 6 17 5 16 4 15 3 14 2 10/100/1000BASE-T ports 26 / Down 25 / Up Power / Self Test LED Unit LEDs 1 2 3 4 Unit 3C17302A Superstack 3 Switch 4200 50-Port 10BASE-T / 100BASE-TX RJ-45 Ports Power / Self Test LED Alert LED 8 32 1 25 31 7 30 6 29 5 28 4 27 3 26 2 49 50 16 40 9 33 39 15 38 14 37 13 36 12 35 11 34 10 24 48 17 41 47 23 46 22 45 21 44 20 43 19 42 18 10/100/1000BASE-T ports Unit LEDs Up Down Alert Power/ Self Test Unit 1 2 3 4 3C17304A Superstack 3 Switch 4200 28-Port 10BASE-T / 100BASE-TX RJ-45 Ports Power/ Self Test Alert 21 9 10 22 11 23 12 24 8 20 1 13 19 7 18 6 17 5 16 4 15 3 14 2 10/100/1000BASE-T ports 26 / Down 25 / Up Power / Self Test LED Unit LEDs 1 2 3 4 Unit 27 28 27 28 Alert LED Alert LED SFP Ports DUA1730-0AAA03.book Page 13 Thursday, November 17, 2005 12:17 PM

WARNING: RJ-45 Ports. These are shielded RJ-45 data sockets. They cannot be used as standard traditional telephone sockets, or to connect the unit to a traditional PBX or public telephone network. Only connect RJ-45 data connectors, network telephony systems, or network telephones to these sockets. Either shielded or unshielded data cables with shielded or unshielded jacks can be connected to these data sockets. 10BASE-T/ 100BASE-TX Ports The Switch has 24 or 48 auto-negotiating 10BASE-T/100BASE-TX ports configured as Auto MDIX (cross-over). While auto-negotiation is enabled, these ports can automatically detect whether they need to operate in MDI or MDIX mode. Alternatively, you can manually set these ports to 10BASE-T half duplex, 10BASE-T full duplex, 100BASE-TX half duplex or 100BASE-TX full duplex. The maximum segment length is 100 m (328 ft) over Category 5 twisted pair cable. 10/100/1000BASE-T Ports The Switch has two auto-negotiating 10/100/1000BASE-T ports configured as Auto MDIX (cross-over). While auto-negotiation is enabled, these ports can automatically detect whether they need to operate in MDI or MDIX mode. These ports provide 10/100/1000 Mbps full duplex connections to other Gigabit Ethernet devices. Full duplex allows packets to be transmitted and received simultaneously which, in effect, doubles the potential throughput of a link. These ports require either straight-through or cross-over Category 5 cables with RJ-45 connectors at both ends. The maximum UTP cable length is 100 m (328 ft) over Category 5 cable. The 10/100/1000BASE-T ports will auto-negotiate to the appropriate speed. SFP Ports This section applies to the SuperStack 3 Switch 4200 28-Port only. The two SFP (Small Form Factor Pluggable) ports support fiber Gigabit Ethernet short-wave (SX), long-wave (LX), long-haul (LH70) and copper (T) transceivers in any combination. This offers you the flexibility of using SFP transceivers to provide connectivity between the Switch and remote 1000 Mbps workgroups or to create a high capacity aggregated link backbone connection. The SFP ports are capable of auto-negotiating flow control. As the speed and duplex modes are fixed by the media type, only the flow control is DUA1730-0AAA03.book Page 14 Thursday, November 17, 2005 12:17 PM

15 negotiated with the link partner. Alternatively, auto-negotiation can be disabled and the flow control setting can be manually configured. LEDs Table 4 lists LEDs visible on the front of the Switch, and how to read their status according to color. For information on using the LEDs for problem solving, see “Solving Problems Indicated by LEDs” on page 54. It is not possible to determine the duplex mode from the LEDs. For more detailed information, refer to the “SuperStack 3 Switch Management Interface Reference Guide” on the CD-ROM that is supplied with the Switch. Table 4 LED behavior LED Color Indicates Port Status LEDs 10BASE-T/100BASE-TX ports Green A 100 Mbps link is present and the port is enabled. Green flashing Packets are being transmitted/received on the port. Yellow A 10 Mbps link is present and the port is enabled. Yellow flashing Packets are being transmitted/received on the port. Green / Yellow alternating A 10 or 100 Mbps link is present, but the port is disabled. Off No link is present. Port Status LEDs SFP ports Green A 1000 Mbps link is present and the port is enabled. Green flashing Packets are being transmitted/received on the port. Port Status LEDs 10/100/1000BASE-T ports Green A 1000 Mbps link is present and the port is enabled. Green flashing Packets are being transmitted/received on the port. Yellow A 10 or 100 Mbps link is present and the port is enabled. Yellow flashing Packets are being transmitted/received on the port. Green / Yellow alternating A 10, 100 or 1000 Mbps link present but disabled. Off No link is present. Unit LEDs 1–4 Green When the Switch forms a stack with other Switch 4200 Family units the LED indicates the position of the unit in the stack and that a link is present. Unit LED number 1 can also indicate a stand-alone Switch. Off The Switch initialization process is not complete. DUA1730-0AAA03.book Page 15 Thursday, November 17, 2005 12:17 PM

Switch 4200 Family — Rear View Detail Figure 4 Switch 4200 Family — rear view Power Socket The Switch automatically adjusts its power setting to any supply voltage in the range 100-240 VAC. Console Port The console port allows you to connect a terminal and perform remote or local out-of-band management. The console port uses a standard null modem cable and is set to auto-baud, 8 data bits, no parity and 1 stop bit. The Switch 4226T, Switch 4250T and Switch 4228G have a Redundant Power Supply (RPS) connector on the rear panel. Refer to the documentation supplied with these models for details. Power/Self Test LED Green The Switch is powered-up and operating normally. Green flashing The Switch is either downloading software or is initializing (which includes running a Power On Self Test). Yellow The Switch has failed its Power On Self Test. Refer to Chapter 4 Solving Problems Indicated by LEDs. Off The Switch is not receiving power or there is a fault with the Power Supply Unit. Alert LED Green flashing The Switch Alert LED has been configured via the CLI or Web Interface to flash. Off The Switch Alert LED has been configured via the CLI or Web Interface to be off (Default state). LED Color Indicates Power Socket Console (max) 19200,8,1,N Console Port Supply Data Warning Label DUA1730-0AAA03.book Page 16 Thursday, November 17, 2005 12:17 PM

17 Default Settings Table 5 shows the default settings for the Switch 4200 Family: Table 5 Default Settings If you initialize a Switch unit by selecting System > Control > Initialize in the Web interface or by entering system control initialize in the Command Line Interface, the following settings are retained to allow you to connect to and manage the Switch: ■ IP Address ■ Subnet Mask ■ Default Router Feature Switch 4200 Family Automatic IP Configuration Enabled Port Status Enabled Port Speed All ports are auto-negotiated, except SFP ports Duplex Mode All ports are auto-negotiated, except SFP ports Flow Control ■ Enabled in half duplex ■ Auto-negotiated in full duplex Broadcast Storm Control Enabled Virtual LANs (VLANs) All ports belong to the untagged Default VLAN (VLAN 1) with IEEE802.1Q learning operational IP Multicast Filtering Filtering enabled Rapid Spanning Tree Protocol Fast Start Enabled Enabled on all 10/100 Mbps ports Disabled on all 1000 Mbps ports RMON Alarm Enabled Smart Auto-Sensing Enabled LACP (10/100/1000BASE-T ports and SFP ports only) Disabled Quality of Service (QoS) All ports prioritize NBX VoIP IP. All ports set to “best effort” for all other traffic. HOL Protection (QoS) 18 Kb DUA1730-0AAA03.book Page 17 Thursday, November 17, 2005 12:17 PM

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This chapter contains the information you need to install and set up the Switch 4200 Family. It covers the following topics: ■ Package Contents ■ Choosing a Suitable Site ■ Rack-mounting ■ Placing Units On Top of Each Other ■ The Power-up Sequence ■ SFP Operation ■ Choosing the Correct Cables WARNING: Safety Information. Before installing or removing any components from the Switch 4200 Family or carrying out any maintenance procedures, you must read the safety information provided in Appendix A of this guide. AVERTISSEMENT: Consignes de sécurité. Avant d'installer ou d'enlever tout composant du Switch 4200 ou d'entamer une procédure de maintenance, lisez les informations relatives à la sécurité qui se trouvent dans l'Appendice A de ce guide. VORSICHT: Sicherheitsinformationen. Bevor Sie Komponenten aus dem Switch 4200 entfernen oder dem Switch 4200 hinzufuegen oder Instandhaltungsarbeiten verrichten, lesen Sie die Sicherheitsanweisungen, die in Appendix A (Anhang A) in diesem Handbuch aufgefuehrt sind. ADVERTENCIA: Información de seguridad. Antes de instalar o extraer cualquier componente del product o de realizar tareas de mantenimiento, debe leer la información de seguridad facilitada en el Apéndice A de esta guía del usuario. AVVERTENZA: Informazioni di sicurezza. Prima di installare o rimuovere qualsiasi componente dal product o di eseguire qualsiasi DUA1730-0AAA03.book Page 19 Thursday, November 17, 2005 12:17 PM

procedura di manutenzione, leggere le informazioni di sicurezza riportate nell'Appendice A della presente guida per l'utente. Package Contents ■ Switch unit ■ CD-ROM ■ Getting Started Guide (this guide) ■ Release Notes ■ Unit Information Labels ■ Warranty Information ■ Power Cord ■ 2 x Mounting brackets ■ 4 x Screws ■ 4 x Rubber feet Choosing a Suitable Site The Switch is suited for use on a desktop, either free standing or mounted in a standard 19-inch equipment rack. Alternatively, the Switch can be mounted in a wiring closet or equipment room, as an aggregator for other Hubs and Switches. A rack-mounting kit containing two mounting brackets is supplied with the Switch. CAUTION: Ensure that the ventilation holes are not obstructed. When deciding where to position the Switch, ensure that: ■ Cabling is located away from: ■ sources of electrical noise such as radios, transmitters and broadband amplifiers. ■ power lines and fluorescent lighting fixtures ■ The Switch is accessible and cables can be connected easily. ■ Water or moisture cannot enter the case of the Switch. ■ Air-flow is not restricted around the Switch or through the vents in the side of the Switch. 3Com recommends that you provide a minimum of 25mm (1in.) clearance. ■ Air temperature around the Switch does not exceed 40 °C (104 °F). DUA1730-0AAA03.book Page 20 Thursday, November 17, 2005 12:17 PM

temperature may be greater than room ambient temperature. ■ The air is as free from dust as possible. ■ The switch is situated away from sources of conductive (electrical) dust, for example, laser printers. ■ The unit is installed in a clean, air conditioned environment. ■ The AC supply used by the switch is separate to that used by units that generate high levels of AC noise, for example, air-conditioning units and laser printers. ■ No more than eight Switch units are placed on top of one another, if the units are free-standing. Rack-mounting The Switch 4200 Family are 1U high and will fit in most standard 19-inch racks. CAUTION: Disconnect all cables from the Switch before continuing. Remove all self adhesive pads from the underside of the Switch if they have been fitted. To rack-mount your Switch: 1 Place the Switch the right way up on a hard flat surface, with the front facing towards you. 2 Locate a mounting bracket over the mounting holes on one side of the Switch, as shown in Figure 5. DUA1730-0AAA03.book Page 21 Thursday, November 17, 2005 12:17 PM

Figure 5 Fitting a bracket for rack-mounting 3 Insert the two screws and tighten with a suitable screwdriver. You must use the screws supplied with the mounting brackets. Damage caused to the unit by using incorrect screws invalidates your warranty. 4 Repeat steps 2 and 3 for the other side of the Switch. 5 Insert the Switch into the 19-inch rack and secure with suitable screws (not provided). Ensure that ventilation holes are not obstructed. 6 Connect network cabling. 7 Finally place a unit information label on the unit in an easily accessible position. The unit information label shows the following: ■ The 3Com product name of the Switch ■ The 3Com 3C number of the Switch ■ The unique MAC address (Ethernet address) of the Switch ■ The serial number of the Switch You may need this information for fault reporting purposes. DUA1730-0AAA03.book Page 22 Thursday, November 17, 2005 12:17 PM

23 Placing Units On Top of Each Other If the Switch units are free-standing, up to eight units can be placed one on top of the other. If you are mixing a variety of SuperStack® 3 Switch and Hub units, the smaller units must be positioned at the top. If you are placing Switch units one on top of the other, you must use the self-adhesive rubber feet supplied. Apply the pads to the underside of each Switch, sticking one in the marked area at each corner. Place the Switch units on top of each other, ensuring that the feet of the upper unit line up with the recesses of the lower unit. Stacking Units Up to four Switch 4200 Family units can be stacked together and then treated as a single manageable unit with one IP address. Any combination of Switch 4200 Family units is allowed in a single stack. The units are connected together via the 10/100/1000BASE-T ports on the front of the unit as shown in Figure 6. Starting from the base of the stack, the port marked with ‘up’ is connected to the port marked with ‘down’ on the unit above. Cable lengths of between 14 cm (5.5 in) and 100 m (328 ft) can be used for stacking. Figure 6 Stacking example The unit LEDs will display the unit number in the stack, from 1 at the bottom to 4 at the top. 3Com recommends that when you add a new unit to a stack, you should first initialize it to factory default settings. Any Switch 4200 unit can be added to the stack, including the Switch 4226T, the Switch 4250T and the Switch 4228G. You must install the latest software version on all units in the stack. Power/ Self Test Alert 21 9 10 22 11 23 12 24 8 20 1 13 19 7 18 6 17 5 16 4 15 3 14 2 26 / Down 25 / Up 1 2 3 4 Unit Power/ Self Test Alert 21 9 10 22 11 23 12 24 8 20 1 13 19 7 18 6 17 5 16 4 15 3 14 2 26 / Down 25 / Up 1 2 3 4 Unit 3C17304A Superstack 3 Switch 4200 28-Port Power/ Self Test Alert 21 9 10 22 11 23 12 24 8 20 1 13 19 7 18 6 17 5 16 4 15 3 14 2 26 / Down 25 / Up 1 2 3 4 Unit 3C17302A Superstack 3 Switch 4200 50-Port 8 32 1 25 31 7 30 6 29 5 28 4 27 3 26 2 49 50 16 40 9 33 39 15 38 14 37 13 36 12 35 11 34 10 24 48 17 41 47 23 46 22 45 21 44 20 43 19 42 18 Up Down Alert Power/ Self Test Unit 1 2 3 4 27 28 27 28 27 28 27 28 3C17304A Superstack 3 Switch 4200 28-Port 3C17300A Superstack 3 Switch 4200 26-Port DUA1730-0AAA03.book Page 23 Thursday, November 17, 2005 12:17 PM

Stack renumbering occurs when another Switch 4200 Family unit is added to the bottom of an established stack except when the stack is already 4 units high. In this instance the ‘down’ port on the bottom unit of the existing stack will be disabled and its LED will flash green. You will then not be able to use that port again until the link is lost on that port. When another Switch 4200 Family unit is added to the top of an established stack, no stack renumbering occurs. If however the unit being added takes the stack height above 4 then the ‘up’ port on the top unit of the existing stack will be disabled and its LED will flash green. You will then not be able to use that port again until the link is lost on that port. When removing a Switch from a stack, note the following: ■ Removing a Switch 4200 Family unit from the bottom of an existing stack will cause the remaining stack to renumber. ■ Removing a Switch 4200 Family unit from the middle of an existing stack will cause the other Switches in the stack to divide into two stacks. Units below the unit removed will not renumber, units above will renumber. ■ Removing a Switch 4200 Family unit from the top of an existing stack will have no effect on the remaining stack. If you are having problems, refer to “Solving Stack Formation Problems” on page 56. The Power-up Sequence The following sections describe how to get your Switch 4200 Family powered-up and ready for operation. Powering-up the Switch 4200 Family Use the following sequence of steps to power-up the Switch. 1 Plug the power cord into the power socket at the rear of the Switch. 2 Plug the other end of the power cord into your power outlet. The Switch powers-up and runs through its Power On Self Test (POST), which takes approximately 10 seconds. Checking for Correct Operation of LEDs During the Power On Self Test, all ports on the Switch are disabled and the LEDs light in a set sequence. DUA1730-0AAA03.book Page 24 Thursday, November 17, 2005 12:17 PM

make sure that your Switch is operating correctly. Table 6 shows possible colors for the LED. Table 6 Power/Self Test LED colors In addition, check the Unit LEDs on all Switches in the stack. If a Unit LED is off, initialization is not complete. 3Com recommends that you do not use the Switch's management interface until the Unit LED is green. If there is evidence of a problem, see “Solving Problems Indicated by LEDs” on page 54. SFP Operation The following section describes how to insert an SFP transceiver into an SFP port on the Switch 4200 28-Port. SFP transceivers are hot-insertable and hot-swappable. You can remove them from and insert them into any SFP port without having to power down the Switch. Approved SFP Transceivers The following list of approved SFP transceivers is correct at the time of publication. ■ 3CSFP91 SFP (SX) ■ 3CSFP92 SFP (LX) ■ 3CSFP93 SFP (T) ■ 3CSFP97 SFP (LH) To access the latest list of approved SFP transceivers for the Switch on the 3Com Corporation World Wide Web site, enter this URL into your internet browser: http://www.3com.com Color State Green The Switch is powered-up and operating normally. Yellow The Switch has failed its Power On Self Test. Off The Switch is not receiving power. DUA1730-0AAA03.book Page 25 Thursday, November 17, 2005 12:17 PM

Inserting an SFP Transceiver To be recognized as valid, the SFP transceiver must have the following characteristics: ■ 1000BASE-SX SFP transceiver Use this transceiver to connect the Switch directly to a multimode fiber-optic cable. ■ 1000BASE-LX SFP transceiver Use this transceiver to connect the Switch directly to a single-mode fiber-optic cable or to multimode fiber using a conditioned launch cable. ■ 1000BASE-LH70 SFP transceiver Use this transceiver to connect the Switch directly to a single-mode fiber-optic cable. ■ 1000BASE-T SFP transceiver This transceiver uses Category 5 copper cabling with RJ-45 connectors and supports segment lengths of up to 100 m (328 ft). If the SFP transceiver is faulty, it will not operate within the Switch. See “Solving Hardware Problems” on page 49. Use of non-3Com SFPs is not recommended. If the SFP transceiver is invalid it will not be recognized by the Switch. Use the following sequence of steps to activate the SFP ports: 1 The SFP transceiver is keyed and there is only one way in which it can be installed correctly. It is not necessary to power-down your Switch. 2 Hold the transceiver so that the connector is toward you and the product label is visible, as shown in Figure 7. Ensure the wire release lever is closed (in the upright position). 3 Gently slide the transceiver into the SFP port until it clicks. CAUTION: SFP transceivers are keyed and can be properly inserted only one way. If the transceiver does not click when you insert it, remove it, turn it over, and reinsert it. 4 Remove the plastic protective cover if fitted. 5 Use the appropriate cable to connect the transceiver to a suitable device. DUA1730-0AAA03.book Page 26 Thursday, November 17, 2005 12:17 PM

27 Figure 7 Inserting an SFP Transceiver 6 Check the LEDs on the front of the Switch to ensure that it is operating correctly. Refer to “LEDs” on page 16 for more information. Removing an SFP Transceiver If you wish to remove a transceiver (it is not necessary to power-down your Switch): 1 Disconnect the cable from the transceiver. 2 Move the wire release lever downwards until it is pointing toward you. 3 Pull the wire release lever toward you to release the catch mechanism; the transceiver will then easily slide out. Choosing the Correct Cables All of the ports on the front of the Switch 4200 Family are Auto-MDIX, that is they have a cross-over capability. The port can automatically detect whether it needs to operate in MDI or MDIX mode. Therefore you can make a connection to a port with a straight-through (MDI) or a cross-over cable (MDIX). The Auto-MDIX feature only operates when auto-negotiation is enabled. If auto-negotiation is disabled, all the Switch ports are configured as MDIX (cross-over). If you want to make a connection to another MDIX Product label SFP port on the Switch 4200 28-Port DUA1730-0AAA03.book Page 27 Thursday, November 17, 2005 12:17 PM

port, you need a cross-over cable. Many ports on workstations and servers are configured as MDI (straight-through). If you want to make a connection to an MDI port, you need to use a standard straight-through cable. See Table 7. 3Com recommends that you use Category 5 twisted pair cable — the maximum segment length for this type of cable is 100 m (328 ft). CAUTION: If you want to install the Switch using a Category 5E or Category 6 cable, 3Com recommends that you briefly connect the cable to a grounded port before connecting network equipment. If you do not, the cables Electrostatic Discharge (ESD) may damage the Switch's port. You can create a grounded port by connecting all wires at one end of a UTP cable to an earth ground point, and the other end to a female RJ-45 connector located, for example, on a Switch rack or patch panel. The RJ-45 connector is now a grounded port. Table 7 Cables required to connect the Switch 4200 Family to other devices if auto-negotiation is disabled Choosing the Correct Fiber Cables Choose from the following cable options: ■ The 1000BASE-SX SFP ports can be connected to multimode fiber cables only. ■ The 1000BASE-LX and LH70 SFP ports can be connected to single-mode fiber cables. The 1000BASE-LX SFP ports can also be connected to multimode fiber cables using a conditioned launch cable. For detailed information on fiber cable specifications, refer to the SuperStack 3 Implementation Guide that accompanies your Switch. Cross-over Cable Straight-through Cable Switch to Switch (MDIX to MDIX) ✓ ✕ Switch to Hub (MDIX to MDIX) ✓ ✕ Switch to PC (NIC) (MDIX to MDI) ✕ ✓ DUA1730-0AAA03.book Page 28 Thursday, November 17, 2005 12:17 PM

29 If you wish to connect a 1000BASE-SX LC port to a fiber port with a different type of connector, for example, SC or ST please contact your network supplier for a suitable patch cable. DUA1730-0AAA03.book Page 29 Thursday, November 17, 2005 12:17 PM

DUA1730-0AAA03.book Page 30 Thursday, November 17, 2005 12:17 PM

Your Switch can operate in its default state, that is, you can install it and it will work straight away (plug-and-play). However, to make full use of the features offered by the Switch, and to change and monitor the way it works, you have to access the management software that resides on the Switch. This is known as managing the Switch. Managing the Switch can help you to improve the efficiency of the Switch and therefore the overall performance of your network. This chapter explains the initial set up of the Switch and the different methods of accessing the management software to manage a Switch. It covers the following topics: ■ Setting Up Overview ■ Manually Configuring IP Information ■ Viewing Automatically Configured IP Information ■ Methods of Managing a Switch ■ Setting Up Command Line Interface Management ■ Setting Up Web Interface Management ■ Setting Up SNMP Management ■ Default Users and Passwords DUA1730-0AAA03.book Page 31 Thursday, November 17, 2005 12:17 PM

Setting Up Overview This section gives an overview of what you need to do to get your Switch set up and ready for management when it is in its default state. The whole setup process is summarised in Figure 8. Detailed procedural steps are contained in the sections that follow. In brief, you need to: ■ Configure IP information manually for your Switch or view the automatically configured IP information ■ Prepare for your chosen method of management Figure 8 Initial Switch Setup and Management Flow diagram CAUTION: To protect your Switch from unauthorized access, you must change all three default passwords as soon as possible, even if you do not intend to actively manage your Switch. For more information on default users and changing default passwords, see “Default Users and Passwords” on page 50. Plug and Play Setup Initial IP Information Setup Feature Management Power up the Switch. IP information is automatically configured. Page 33. Do you want to configure the IP information? manually No Connect to a front panel port and use the Web Interface or Command Line Interface. Page 35. How do you want to connect to the Switch? Connect to the console port and use the Command Line Interface. Page 38. Use 3Com Network Supervisor (3NS). Page 42. Connect to a console port and use the Command Line Interface. Page 42. How do you want to Manage your Switch? Page 45. Command Line Interface Connect over the network via Telnet. Page 47. Connect via the console port. Page 47. Connect over the network. Page 49. How do you want to view the automatically configured IP information? SNMP Page 49. Web Interface Yes DUA1730-0AAA03.book Page 32 Thursday, November 17, 2005 12:17 PM

33 IP Configuration You can use one of the following methods to allocate IP information to your Switch (essential if you wish to manage your Switch across the network). Manual IP Configuration You can choose to configure the IP information yourself. The Switch remembers the information that you enter until you change it again or set the configuration method to Automatic. You should use the Manual IP configuration method if: ■ you do not have a DHCP or BootP server on your network, or ■ you want to remove the risk of the IP address ever changing, or ■ your DHCP or BootP server does not allow you to allocate static IP addresses. (Static IP addresses are necessary to ensure that the Switch is always allocated the same IP information.) For most installations, 3Com recommends that you configure the Switch IP information manually. This makes management simpler and more reliable as it is not dependent on a DHCP or BootP server, and eliminates the risk of the IP address changing. If you wish to manually enter IP information for your Switch, work through the “Manually Configuring IP Information” section on page 35. Automatic IP Configuration By default the Switch tries to configure itself with IP information without requesting user intervention. It tries to obtain an IP address from a DHCP or BootP server on the network. If neither server is found, the Switch will configure itself with its default IP address 169.254.100.100 if it is operating in a standalone mode, and/or no other Switches on the network have this IP address. If this default IP address is already in use on the network then the Switch detects this and configures itself with an IP address in the range 169.254.1.0 to 169.254.254.255. This process is known as Auto-IP and is the same mechanism used by Windows 2000. IP addresses configured by Auto-IP are temporary as they cannot be routed but are useful for small networks which are not connected to other networks, or for initial configuration. DUA1730-0AAA03.book Page 33 Thursday, November 17, 2005 12:17 PM

However, as soon as a DHCP or BootP server is detected, the Switch will configure itself with the IP address allocated by that server. When using automatic IP configuration it is important that the IP address of the Switch is static, otherwise you will not know what the IP address is and it will be difficult to manage. Most DHCP and BootP servers allow static IP addresses to be configured so that you know what IP address will be allocated to the Switch. Refer to the documentation that accompanies your DHCP/BootP server. For a detailed description of how automatic IP configuration operates, please refer to the Implementation Guide on the CD-ROM that accompanies your Switch or on the 3Com Web site. You should use the automatic IP configuration method if: ■ your network uses DHCP or BootP to allocate IP information, or ■ flexibility is needed. If the Switch is re-deployed onto a different subnet, it will automatically reconfigure itself with an appropriate IP address, instead of you having to manually reconfigure the Switch. If you use the automatic IP configuration method, you need to discover the automatically allocated IP information before you can begin management. Work through the “Viewing Automatically Configured IP Information” section on page 42. Preparing for Management Once your Switch’s initial set up is complete you can set up your chosen management method as described in “Methods of Managing a Switch” on page 45. For detailed information about the specific web interface operations and command line interface commands and problem solving, refer to the “SuperStack 3 Switch Management Interface Reference Guide” on the CD-ROM that is supplied with the Switch or on the 3Com Web site. DUA1730-0AAA03.book Page 34 Thursday, November 17, 2005 12:17 PM

35 Manually Configuring IP Information You can manually configure the Switch IP information in the following ways: ■ Connecting to a front panel port — Connect a workstation using an Ethernet cable to a front panel port of the Switch. You can then manually enter IP information using the web interface or the command line interface (CLI). ■ Connecting to the console port — Connect a workstation using a console cable to the console port of the Switch. You can then manually enter IP information using the command line interface (CLI). Connecting to a Front Panel Port To set up your Switch manually you can make a connection to a front panel port. You must do this whilst the Switch is offline, that is, before you connect the Switch to a network. The procedure described in this section assumes the unit has been powered up in standalone mode and has the default IP address of 169.254.100.100. Pre-requisites ■ A workstation running Windows 2000, Windows XP or Windows Server 2003, Red Hat Linux 9, Solaris 7 or Solaris 9. ■ A Network Interface Card (NIC). ■ A Category 5 twisted pair Ethernet cable with RJ-45 connectors. ■ A suitable Web browser — refer to “Choosing a Browser”on page 48. ■ You need to have the following so that you can manually set up the Switch with IP information: ■ IP address ■ subnet mask ■ default gateway DUA1730-0AAA03.book Page 35 Thursday, November 17, 2005 12:17 PM

Connecting the Workstation to the Switch 1 Connect the workstation to a front panel port using an Ethernet cable as shown in Figure 9. Figure 9 Connecting a workstation to the Switch via a front panel port To connect the cable: a Attach an RJ-45 connector at one end of the Ethernet cable to the Network Interface Card (NIC) in the workstation. b Connect the RJ-45 connector at the other end of the cable to one of the front panel ports on the Switch. Do not interconnect the Switch to any other unconfigured Switch. Configuring the Workstation with IP Information You need to change the IP address and subnet mask of the workstation that you have connected to the Switch. Make a note of the existing settings so you can return to them later. Change the workstation to the following settings: ■ IP address — 169.254.100.99 ■ Subnet mask — 255.255.0.0 Setting Up the Switch with IP Information You are now ready to manually set up the Switch with IP information. You can do this using the Web interface or the command line interface (CLI) via telnet. Using the Web Interface 1 Power-up the Switch. This takes approximately one minute. 2 Open a suitable Web browser and enter 169.254.100.100 in the Location Address field. This is the default IP address that is automatically assigned to an offline unit. DUA1730-0AAA03.book Page 36 Thursday, November 17, 2005 12:17 PM

37 If there is no response, wait for one minute then re-enter the default IP address. 3 At the login and password prompts, enter admin as your user name and press Return at the password prompt (default user name and password). If you have logged on correctly, a set of Getting Started pages are displayed. 4 The Getting Started pages allow you to enter basic setup information for the Switch. Select Manual and then enter the IP address, subnet mask, and default gateway that you want the Switch to use when it is connected to the network. The final page displays a summary of the information entered. The initial set up of your Switch is now complete and the Switch is ready for you to set up your chosen management method. See “Methods of Managing a Switch” on page 45. Using Command Line Interface via Telnet Accessing the Command Line Interface via Telnet or Windows HyperTerminal using TCP/IP may not work correctly on some platforms unless it has been configured to send line feeds with carriage returns. To set this for telnet enter set crlf when in command mode. To set this for HyperTerminal click on the Settings tab in the Properties screen, click on ASCII Setup.. and ensure that Send line ends with line feeds is checked within the ASCII Sending section. You should not configure HyperTerminal in this way if you are using a console cable to make a direct connection to the Switch. 1 To start a Telnet session to the unit, click Start in Microsoft Windows 2000, XP or 2003 Server. a Click Run. b In the dialogue box that appears type the default IP address of the unit, that is: Telnet 169.254.100.100 c Click OK. 2 Press Enter to open a login prompt. If the login prompt does not begin immediately, press Return a few times until it starts. 3 At the login and password prompts, enter admin as your user name and press Return at the password prompt. If you have logged on correctly, the DUA1730-0AAA03.book Page 37 Thursday, November 17, 2005 12:17 PM

top-level menu of the command line interface is displayed as shown in the example in Figure 10. Figure 10 Example top-level command line interface menu 4 At the Select menu option prompt you can either: ■ enter the protocol ip basicConfig command. At the Enter configuration method prompt enter manual. The screen prompts you to enter IP information. or ■ enter the gettingStarted command. At the Enter configuration method prompt enter manual. The screen prompts you to enter IP information. 5 Enter the IP address, subnet mask, and gateway IP address for the Switch. The screen displays a summary of the information entered. The initial set up of your Switch is now complete and the Switch is ready for you to set up your chosen management method. See “Methods of Managing a Switch” on page 45. Connecting to the Console Port To set up your Switch manually you can alternatively make a connection to the console port (this example describes a local connection to the console port, rather than a remote one via a modem). You can do this whilst the Switch is offline, that is, before you connect the Switch to a network, or whilst the Switch is online, that is, connected to a network. Menu options: --------------3Com Superstack 3 Switch 4200--------------- bridge - Administer bridge-wide parameters gettingStarted - Basic device configuration logout - Logout of the Command Line Interface physicalInterface - Administer physical interfaces protocol - Administer protocols security - Administer security system - Administer sytem-level functions trafficManagement - Administer traffic management Type ? For help -------------------------------(1)----------------------------------- Select menu option: DUA1730-0AAA03.book Page 38 Thursday, November 17, 2005 12:17 PM

39 Pre-requisites ■ A workstation with terminal emulation software installed, such as Microsoft Hyperterminal. This software allows you to communicate with the Switch via the console port directly, or through a modem. ■ Documentation supplied with the terminal emulation software. ■ A suitable cable: ■ A standard null modem cable — if you are connecting directly to the console port, or ■ A standard modem cable — if you are connecting to the console port using a modem. You can find pin-out diagrams for both cables in Appendix B on page 69. ■ You need to have the following so that you can manually set up the Switch with IP information: ■ IP address ■ subnet mask ■ default gateway Connecting the Workstation to the Switch 1 Connect the workstation to the console port using a standard null modem cable as shown in Figure 11. Figure 11 Connecting a workstation to the Switch via the console port To connect the cable: a Attach the female connector on the cable to the male connector on the console port of the Switch. b Tighten the retaining screws on the cable to prevent it from being loosened. c Connect the other end of the cable to one of the serial ports (also known as a COM port) on your workstation. DUA1730-0AAA03.book Page 39 Thursday, November 17, 2005 12:17 PM

2 Open your terminal emulation software and configure the COM port settings to which you have connected the cable. The settings should be set to match the default settings for the Switch, which are: ■ 19,200 baud ■ 8 data bits ■ no parity ■ 1 stop bit ■ no hardware flow control Refer to the documentation that accompanies the terminal emulation software for more information. Setting Up the Switch with IP Information You are now ready to manually set up the Switch with IP information using the command line interface. 1 The command line interface login sequence begins as soon as the Switch detects a connection to its console port. If the login prompt does not begin immediately, press Return a few times until it starts. 2 At the login and password prompts, enter admin as your user name and press Return at the password prompt. If you have logged on correctly, the top-level menu of the command line interface is displayed as shown in the example in Figure 12. DUA1730-0AAA03.book Page 40 Thursday, November 17, 2005 12:17 PM

41 Figure 12 Example top-level command line interface menu 3 At the Select menu option prompt you can either: ■ enter the protocol ip basicConfig command. At the Enter configuration method prompt enter manual. The screen prompts you to enter IP information. or ■ enter the gettingStarted command. At the Enter configuration method prompt enter manual. The screen prompts you to enter IP information. 4 Enter the IP address, subnet mask, and gateway IP address for the Switch. The screen displays a summary of the information entered. The initial set up of your Switch is now complete and the Switch is ready for you to set up your chosen management method. See “Methods of Managing a Switch” on page 45. If you do not intend to use the command line interface via the console port to manage the Switch, you can disconnect the serial cable and close the terminal emulator software. Menu options: --------------3Com Superstack 3 Switch 4200--------------- bridge - Administer bridge-wide parameters gettingStarted - Basic device configuration logout - Logout of the Command Line Interface physicalInterface - Administer physical interfaces protocol - Administer protocols security - Administer security system - Administer sytem-level functions trafficManagement - Administer traffic management Type ? For help -------------------------------(1)----------------------------------- Select menu option: DUA1730-0AAA03.book Page 41 Thursday, November 17, 2005 12:17 PM

Viewing Automatically Configured IP Information If you allow the Switch to automatically configure its own IP information you need to discover and view the IP information before you can begin to manage the Switch. You can discover the IP information in two ways: ■ Using 3Com Network Supervisor — This application will auto-discover the Switch and display the automatically allocated IP information assigned to the Switch. ■ Connecting to the Console Port — Connect a workstation using a console cable to the console port of the Switch. You can then view the IP information automatically assigned to the Switch using the command line interface (CLI). Using 3Com Network Supervisor You can use the 3Com Network Supervisor application provided on the CD-ROM that accompanies your Switch to discover the automatically allocated IP information. 1 Connect your Switch to the network. 2 Power-up the Switch and wait for two minutes. 3 Launch 3Com Network Supervisor and run the Auto-discovery wizard. 3Com Network Supervisor will auto-discover the new Switch and display the IP information that has been automatically allocated to the Switch. Most DHCP and BootP servers allow static IP addresses to be configured so that you know what IP address the Switch will be given. Refer to the documentation that accompanies your DHCP or BootP server. If your network does not have a DHCP or BootP server, the workstation running 3Com Network Supervisor must be on the same subnet as the Switch, because Auto-IP addresses are non-routable. Connecting to the Console Port Alternatively, you can view the automatically configured IP information via the command line interface (CLI) through a connection to the console port. (This example describes a local connection to the console port, rather than a remote one via a modem.) Pre-requisites ■ A workstation with terminal emulation software installed, such as Microsoft Hyperterminal. This software allows you to communicate with the Switch via the console port directly, or through a modem. ■ Documentation supplied with the terminal emulation software. DUA1730-0AAA03.book Page 42 Thursday, November 17, 2005 12:17 PM

43 ■ A suitable cable: ■ A standard null modem cable — if you are connecting directly to the console port, or ■ A standard modem cable — if you are connecting to the console port using a modem. You can find pin-out diagrams for both cables in Appendix B on page 69. ■ A Category 5 twisted pair Ethernet cable with RJ-45 connectors to connect your Switch to the network. Connecting the Workstation to the Switch 1 Connect the workstation to the console port using a standard null modem cable as shown in Figure 13. Figure 13 Connecting a workstation to the Switch via the console port To connect the cable: a Attach the female connector on the cable to the male connector on the console port of the Switch. b Tighten the retaining screws on the cable to prevent it from being loosened. c Connect the other end of the cable to one of the serial ports (also known as a COM port) on your workstation. 2 Open your terminal emulation software and configure the COM port settings to which you have connected the cable. The settings should be set to match the default settings for the Switch, which are: ■ 19,200 baud ■ 8 data bits ■ no parity ■ 1 stop bit ■ no hardware flow control Refer to the documentation that accompanies the terminal emulation software for more information. DUA1730-0AAA03.book Page 43 Thursday, November 17, 2005 12:17 PM

Viewing IP Information via the Console Port You are now ready to view the automatically allocated IP information using the command line interface. 1 Connect your Switch to the network using an Ethernet cable. As soon as a network connection is made the Switch begins the automatic IP configuration process. The automatic IP configuration process usually completes within one minute. If there is no response from a DHCP server within 30 seconds, the Auto-IP configuration mechanism attempts to allocate the default IP address 169.254.100.100. If this address is not available, it then allocates an IP address in the range of 169.254.x.y (where x is in the range 1 to 254, and y is in the range 0 to 255). 2 The command line interface login sequence begins as soon as the Switch detects a connection to its console port. If the login prompt does not begin immediately, press Return a few times until it starts. 3 At the login and password prompts, enter admin as your user name and press Return at the password prompt. If you have logged on correctly, the top-level menu of the command line interface is displayed as shown in the example in Figure 14. Figure 14 Example top-level command line interface menu 4 At the Select menu option prompt enter the protocol ip interface summary command. At the Select IP interfaces Menu options: --------------3Com Superstack 3 Switch 4200--------------- bridge - Administer bridge-wide parameters gettingStarted - Basic device configuration logout - Logout of the Command Line Interface physicalInterface - Administer physical interfaces protocol - Administer protocols security - Administer security system - Administer sytem-level functions trafficManagement - Administer traffic management Type ? For help -------------------------------(1)----------------------------------- Select menu option: DUA1730-0AAA03.book Page 44 Thursday, November 17, 2005 12:17 PM

45 prompt enter all. A summary of the automatically allocated IP information is displayed. Make a note of the Network IP Address. The initial set up of your Switch is now complete and the Switch is ready for you to set up your chosen management method. See “Methods of Managing a Switch” on page 45. If you do not intend to use the command line interface via the console port to manage the Switch, you can disconnect the serial cable and close the terminal emulator software. Methods of Managing a Switch Once you have completed the initial set up of your Switch, you can decide how you wish to manage the Switch. You can use one of the following methods: ■ Command line interface management ■ Web interface management ■ SNMP management Command Line Interface Management Each Switch has a command line interface (CLI) that allows you to manage the Switch from a workstation, either locally via a console port connection (see Figure 15), or remotely over the network (see Figure 16). DUA1730-0AAA03.book Page 45 Thursday, November 17, 2005 12:17 PM

Figure 15 CLI management via the console port Figure 16 CLI management over the network Refer to “Setting Up Command Line Interface Management” on page 47. Web Interface Management Each Switch has an internal set of web pages that allow you to manage the Switch using a Web browser remotely over an IP network (see Figure 17). Figure 17 Web interface management over the network Refer to “Setting Up Web Interface Management” on page 48. SNMP Management You can manage a Switch using any network management workstation running the Simple Network Management Protocol (SNMP) as shown in Figure 18. For example, you can use the 3Com Network Supervisor software that is provided on the CD-ROM that accompanies your Switch. DUA1730-0AAA03.book Page 46 Thursday, November 17, 2005 12:17 PM

47 Figure 18 SNMP management over the network Refer to “Setting Up SNMP Management” on page 49. Setting Up Command Line Interface Management This section describes how you can set up command line interface management using a local console port connection or over the network. CLI Management via the Console Port To manage a Switch using the command line interface via the local console port connection: 1 Ensure you have connected your workstation to the console port correctly as described in “Connecting to the Console Port” on page 38. 2 Your Switch is now ready to continue being managed and/or configured through the CLI via its console port. CLI Management over the Network To manage a Switch using the command line interface over a network using Telnet: 1 Ensure you have already set up the Switch with IP information as described in “Setting Up Overview” on page 32. 2 Check that you have the IP protocol correctly installed on your management workstation. You can check this by trying to browse the World Wide Web. If you can browse, the IP protocol is installed. 3 Check you can communicate with the Switch by entering a ping command at the DOS prompt in the following format: c:\ ping xxx.xxx.xxx.xxx (where xxx.xxx.xxx.xxx is the IP address of the Switch) If you get an error message, check that your IP information has been entered correctly and the Switch is powered up. DUA1730-0AAA03.book Page 47 Thursday, November 17, 2005 12:17 PM

4 To open a Telnet session via the DOS prompt, enter the IP address of the Switch that you wish to manage in the following format: >telnet xxx.xxx.xxx.xxx (where xxx.xxx.xxx.xxx is the IP address of the Switch) If opening a Telnet session via third party software you will need to enter the IP address in the format suitable for that software. 5 At the login and password prompts, enter admin as your user name and press Return at the password prompt (or the password of your choice if you have already modified the default passwords). If the login prompt does not display immediately, press Return a few times until it starts. 6 If you have logged on correctly, the top-level menu of the command line interface for the Switch you wish to manage is displayed as shown in Figure 12 on page 41. Setting Up Web Interface Management This section describes how you can set up web interface management over the network. Pre-requisites ■ Ensure you have already set up the Switch with IP information as described in “Setting Up Overview” on page 32. ■ Ensure that the Switch is connected to the network using a Category 5 twisted pair Ethernet cable with RJ-45 connectors. ■ A suitable Web browser. Choosing a Browser To display the web interface correctly, use one of the following Web browser and platform combinations, with pop-ups enabled: Table 8 Supported Web Browsers and Platforms Windows 2000 Windows XP Windows Server 2003 Red Hat Linux 9 Solaris 7/9 Netscape 7.1 ✓ ✓ ✕ ✓ ✓ Internet Explorer 5.5 ✓ ✓ ✓ ✕ ✕ Internet Explorer 6.0 ✓ ✓ ✓ ✕ ✕ DUA1730-0AAA03.book Page 48 Thursday, November 17, 2005 12:17 PM

49 For the browser to operate the web interface correctly, JavaScript™ and Cascading Style Sheets must be enabled on your browser. These features are enabled on a browser by default. You will only need to enable them if you have changed your browser settings. Web Management Over the Network To manage a Switch using the web interface over an IP network: 1 Check that you have the IP protocol correctly installed on your management workstation. You can check this by trying to browse the World Wide Web. If you can browse, the IP protocol is installed. 2 Check you can communicate with the Switch by entering a ping command at the DOS prompt in the following format: c:\ ping xxx.xxx.xxx.xxx (where xxx.xxx.xxx.xxx is the IP address of the Switch) If you get an error message, check that your IP information has been entered correctly and the Switch is powered up. 3 Open your web browser and enter the IP address of the Switch that you wish to manage in the URL locator, for example, in the following format: http://xxx.xxx.xxx.xxx 4 At the login and password prompts, enter admin as your user name and press Return at the password prompt (or the password of your choice if you have already modified the default passwords). 5 Click on the Device View button to display the web management options. Setting Up SNMP Management Any network management application running the Simple Network Management Protocol (SNMP) can manage a Switch if: ■ The correct Management Information Bases (MIBs) are installed on the management workstation. ■ The management workstation is connected to the Switch using a port in VLAN 1 (the Default VLAN). By default, all ports on the Switch are in VLAN 1. Mozilla 1.0 ✓ ✓ ✕ ✓ ✓ Windows 2000 Windows XP Windows Server 2003 Red Hat Linux 9 Solaris 7/9 DUA1730-0AAA03.book Page 49 Thursday, November 17, 2005 12:17 PM

You can use the 3Com Network Supervisor application that is provided on the CD-ROM that accompanies your Switch to provide SNMP management for your Switch. If you use 3Com Network Supervisor it automatically loads the correct MIBs and necessary files onto your workstation. Pre-requisites ■ Documentation supplied with the SNMP network management application software. To manage your Switch using an SNMP network management application, you need to specify SNMP community strings for the users defined on the Switch. You can do this using the command line interface system management snmp community command — refer to the command line interface section of the “SuperStack 3 Switch Management Interface Reference Guide” for more information. Default Users and Passwords If you intend to manage the Switch using the web interface or the command line interface, or to change the default passwords, you need to log in with a valid user name and password. The Switch has three default user names, and each user name has a different password and level of access. These default users are listed in Table 9. CAUTION: To protect your Switch from unauthorized access, you must change all three default passwords as soon as possible, even if you do not intend to actively manage your Switch Table 9 Default Users Use the admin default user name (no password) to login and carry out initial Switch setup. User Name Default Password Access Level monitor monitor monitor — the user can view all manageable parameters, except special/security features, but cannot change any manageable parameters. manager manager manager — the user can access and change the operational parameters but not special/security features admin (no password) security — the user can access and change all manageable parameters DUA1730-0AAA03.book Page 50 Thursday, November 17, 2005 12:17 PM

51 Changing Default Passwords You can change the default passwords using either: ■ The gettingStarted command on the CLI, or ■ The security device user modify command on the CLI, or ■ The Security > Device > User > Modify operation on the web interface. For more information about default users and passwords, refer to the “Superstack 3 Switch Management Interface Reference Guide” on the Switch CD-ROM. DUA1730-0AAA03.book Page 51 Thursday, November 17, 2005 12:17 PM

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with the operation of your Switch. There is also an explanation of IP addressing. The topics covered are: ■ Solving Problems Indicated by LEDs ■ Solving Hardware Problems ■ Solving Communication Problems ■ Solving Software Upgrade Problems If you experience a problem that is not listed here, it may be included in the support section of the SuperStack 3 Switch Management Interface Reference Guide on the CD-ROM that accompanies your Switch. For Technical Support information, see Appendix D. DUA1730-0AAA03.book Page 53 Thursday, November 17, 2005 12:17 PM

Solving Problems Indicated by LEDs If the LEDs on the Switch indicate a problem, refer to the list of suggested solutions below. The Power LED does not light Check that the power cable is firmly connected to the Switch and to the supply outlet. If the connection is secure and there is still no power, you may have a faulty power cord or an internal fault. Firstly, check the power cord by: ■ testing it in another device ■ connecting a working power cord to the ‘problem’ device then contact your supplier for advice. On powering-up, the Power/Self Test LED lights yellow The Switch unit has failed its Power On Self Test (POST) because of an internal problem. If a port has failed it’s POST, it’s LED will flash green/yellow alternately to indicate that the port is disabled. Contact your supplier for advice. A link is connected and yet the Status LED for the port does not light Check that: ■ The Switch and the device at the other end of the link (or cable) are connected securely. ■ The devices at both ends of the link are powered-up ■ The quality of cable is satisfactory ■ Auto-negotiation settings are the same at both ends. Auto-negotiation problems will occur with all ports where auto-negotiation is disabled and incorrect cables are being used (cross-over or straight). Solving Hardware Problems Error message indicating that the SFP transceiver is invalid. The Switch has identified that the SFP does not meet the minimum requirements for the Switch and has disabled the port. To correct this DUA1730-0AAA03.book Page 54 Thursday, November 17, 2005 12:17 PM

55 problem, completely remove the SFP and replace it with a 3Com approved SFP. See “Approved SFP Transceivers” on page 26. Error message indicating that the SFP transceiver is faulty. To correct this problem, completely remove the SFP and then reinsert it.Alternatively, insert another identical SFP. If the problem persists, contact 3Com Technical Support. Solving Communication Problems If you experience communication problems with the Switch, ensure that: ■ The Switch IP address has been configured as described in Chapter 3 ■ If the Switch is separated from your management application by a router, ensure that the default gateway IP address within the Switch is the same as the IP address of the router. ■ The Switch’s IP address has been entered correctly in your network management application (such as 3Com Network Supervisor). The following is a brief overview of IP addressing, and how to obtain a registered IP address. IP Addressing To be managed correctly, each device on your network (for example a Switch or Hub) must have a unique IP address. IP addresses have the format n.n.n.n where n is a decimal number between 0 and 255. An example IP address is 192.168.100.8. The IP address is split into two parts: ■ The first part (‘192.168.100’ in the example) identifies the network on which the device resides ■ The second part (‘.8’ in the example) identifies the device within the network The natural subnet mask for this example is 255.255.255.0. If your network has a connection to the external IP network, that is, you access the Internet, you must apply for a registered IP address. DUA1730-0AAA03.book Page 55 Thursday, November 17, 2005 12:17 PM

How do you obtain a registered IP Address? The IP registration system ensures that every IP address used is unique; if you do not have a registered IP address, you may be using an identical address to someone else and your network will not operate correctly. InterNIC Registration Services is the organization responsible for supplying registered IP addresses. The following contact information is correct at time of publication: World Wide Web site: http://www.internic.net If your IP network is internal to your organization only, that is, you do not access the Internet, you may use any arbitrary IP address as long as it is not being used by another device on your network. 3Com suggests you use addresses in the series 192.160.100.X (where X is a number between 1 and 254) with a subnet mask of 255.255.255.0. These suggested IP addresses are part of a group of IP addresses that have been set aside specially for use ‘in house’ only. Solving Stack Formation Problems If you are having problems with correctly forming a stack, first ensure that Spanning Tree is enabled. If it is enabled, do the following: 1 Power off all units in the stack. 2 Check all the cable connections in the stack. 3 Power on all units in the stack. Solving Software Upgrade Problems You can upgrade the management software of the Switch by using the System > Control > Software Upgrade operation in the Web Interface, or the system control softwareUpgrade command in the command line interface. For details on these options, refer to the Management Interface Reference Guide supplied in HTML format on the CD-ROM that accompanies your Switch. If you have problems with your software upgrade, refer to the Problem Solving section in the Management Interface Reference Guide. DUA1730-0AAA03.book Page 56 Thursday, November 17, 2005 12:17 PM

installation or removal of components, or any maintenance procedures on the Switch 4200 Family. WARNING: Warnings contain directions that you must follow for your personal safety. Follow all directions carefully. You must read the following safety information carefully before you install or remove the unit. AVERTISSEMENT: Les avertissements présentent des consignes que vous devez respecter pour garantir votre sécurité personnelle. Vous devez respecter attentivement toutes les consignes. Nous vous demandons de lire attentivement les consignes suivantes de sécurité avant d’installer ou de retirer l’appareil. VORSICHT: Warnhinweise enthalten Anweisungen, die Sie zu Ihrer eigenen Sicherheit befolgen müssen. Alle Anweisungen sind sorgfältig zu befolgen. Sie müssen die folgenden Sicherheitsinformationen’ sorgfältig durchlesen, bevor Sie das Gerät installieren oder ausbauen. ADVERTENCIA: Las advertencias contienen indicaciones que debe respetar por su seguridad personal. Siga las indicaciones con cuidado. Lea detenidamente la información de seguridad siguiente antes de instalar o retirar la unidad. AVVERTENZA: Le avvertenze contengono istruzioni indispensabili per assicurare la sicurezza personale. Seguire attentamente tutte le indicazioni fornite. Prima di installare o rimuovere l'unità leggere attentamente le seguenti informazioni di sicurezza. DUA1730-0AAA03.book Page 57 Thursday, November 17, 2005 12:17 PM

Important Safety Information WARNING: Installation and removal of the unit must be carried out by qualified personnel only. WARNING: If installing the Switch 4200 Family unit in a stack with SuperStack II or SuperStack 3 units that are shallower than the 4200 Family, the Switch 4200 Family unit must be installed below the narrower units. WARNING: The unit must be earthed (grounded). WARNING: Connect the unit to an earthed power supply to ensure compliance with safety standards. WARNING: Power Cord Set: This must be approved for the country where it is used: WARNING: The appliance coupler (the connector to the unit and not the wall plug) must have a configuration for mating with an EN60320/IEC320 appliance inlet. U.S.A. and Canada ■ The cord set must be UL-approved and CSA certified. ■ The minimum specification for the flexible cord is: No. 18 AWG Type SV or SJ 3-conductor ■ The cord set must have a rated current capacity of at least 10A. ■ The attachment plug must be an earth-grounding type with a NEMA 5-15P (15A, 125V) or NEMA 6-15P (15A, 250V) configuration. United Kingdom only ■ The supply plug must comply with BS1363 (3-pin 13 amp) and be fitted with a 5A fuse which complies with BS1362. ■ The mains cord must be or marked and be of type H03VVF3GO.75 (minimum). Europe only: ■ The supply plug must comply with CEE 7/7 (“SCHUKO”). ■ The mains cord must be or marked and be of type H03VVF3GO.75 (minimum). Denmark ■ The supply plug must comply with section 107-2-D1, standard DK2-1a or DK2-5a. Switzerland ■ The supply plug must comply with SEV/ASE 1011. DUA1730-0AAA03.book Page 58 Thursday, November 17, 2005 12:17 PM

59 WARNING: The socket outlet must be near to the unit and easily accessible. You can only remove power from the unit by disconnecting the power cord from the outlet. WARNING: This unit operates under SELV (Safety Extra Low Voltage) conditions according to IEC 950. The conditions are only maintained if the equipment to which it is connected also operates under SELV conditions. WARNING: France and Peru only: This unit cannot be powered from IT† supplies. If your supplies are of IT type, this unit must be powered by 230V (2P+T) via an isolation transformer ratio 1:1, with the secondary connection point labelled Neutral, connected directly to earth (ground). †Impédance à la terre. WARNING: U.K. only: If connecting a modem to the console port of the Switch 4200 Family, only use a modem which is suitable for connection to the telecommunications system. WARNING: RJ-45 Ports. These are shielded RJ-45 data sockets. They cannot be used as standard traditional telephone sockets, or to connect the unit to a traditional PBX or public telephone network. Only connect RJ-45 data connectors, network telephony systems, or network telephones to these sockets. Either shielded or unshielded data cables with shielded or unshielded jacks can be connected to these data sockets. DUA1730-0AAA03.book Page 59 Thursday, November 17, 2005 12:17 PM

WARNING: Fiber Optic ports - Optical Safety Never look at the transmit laser while it is powered-up. Never look directly at the fiber ports and fiber cable ends when they are powered-up. WARNING: Use of controls or adjustments of performance or procedures other than those specified herein may result in hazardous laser emissions. L’information de Sécurité Importante AVERTISSEMENT: L'installation et la dépose de ce groupe doivent être confiés à un personnel qualifié. AVERTISSEMENT: Si vous entassez l'unité Switch avec les unités SuperStack 3 Hub, l'unité Switch 4200 doit être installée en dessous des unités Hub plus étroites. AVERTISSEMENT: Vous devez mettre l’appareil à la terre (à la masse) ce groupe. AVERTISSEMENT: Brancher l’unité à une source de courant mise à la terre pour assurer la conformité aux normes de sécurité. DUA1730-0AAA03.book Page 60 Thursday, November 17, 2005 12:17 PM

61 AVERTISSEMENT: Cordon électrique: Il doit être agréé ans le pays d'utilisation: AVERTISSEMENT: Le coupleur d'appareil (le connecteur du groupe et non pas la prise murale) doit respecter une configuration qui permet un branchement sur une entrée d'appareil EN60320/CEI 320. AVERTISSEMENT: La prise secteur doit se trouver à proximité de l’appareil et son accès doit être facile. Vous ne pouvez mettre l’appareil hors circuit qu'en débranchant son cordon électrique au niveau de cette prise. AVERTISSEMENT: L’appareil fonctionne à une tension extrêmement basse de sécurité qui est conforme à la norme CEI 950. Ces conditions ne sont maintenues que si l'équipement auquel il est raccordé fonctionne dans les mêmes conditions. AVERTISSEMENT: France et Pérou uniquement: Ce groupe ne peut pas être alimenté par un dispositif à impédance à la terre. Si vos alimentations sont du type impédance à la terre, ce groupe doit être alimenté par une tension de 230 V (2 P+T) par le biais d'un transformateur d'isolement à rapport 1:1, avec un point secondaire de Etats-Unis et Canada ■ Le cordon doit avoir reçu l'homologation des UL et un certificat de la CSA ■ Le cordon souple doit respecter, à titre minimum, les spécifications suivantes : ■ calibre 18 AWG ■ type SV ou SJ ■ à 3 conducteurs ■ Le cordon doit être en mesure d'acheminer un courant nominal d'au moins 10 A ■ La prise femelle de branchement doit être du type à mise à la terre (mise à la masse) et respecter la configuration NEMA 5-15P (15 A, 125 V) ou NEMA 6-15P (15 A, 250 V) Danemark ■ La prise mâle d'alimentation doit respecter la section 107-2 D1 de la norme DK2 1a ou DK2 5a Europe ■ La prise secteur doit être conforme aux normes CEE 7/7 (“SCHKO”) ■ LE cordon secteur doit porter la mention ou et doit être de type HO3VVF3GO.75 (minimum). Suisse ■ La prise mâle d'alimentation doit respecter la norme SEV/ASE 1011 DUA1730-0AAA03.book Page 61 Thursday, November 17, 2005 12:17 PM

connexion portant l'appellation Neutre et avec raccordement direct à la terre (masse). AVERTISSEMENT: Points d’accès RJ-45. Ceux-ci sont protégés par des prises de données. Ils ne peuvent pas être utilisés comme prises de téléphone conventionnelles standard, ni pour la connection de l’unité à un réseau téléphonique central privé ou public. Raccorder seulement connecteurs de données RJ-45, systèmes de réseaux de téléphonie ou téléphones de réseaux à ces prises. Il est possible de raccorder des câbles protégés ou non protégés avec des jacks protégés ou non protégés à ces prises de données. AVERTISSEMENT: Ports pour fibres optiques – sécurité sur le plan optique Ne regardez jamais le laser tant qu'il est sous tension. Ne regardez jamais directement le port à fibres optiques et les embouts de câbles à fibres optiques tant qu'ils sont sous tension. AVERTISSEMENT: L'utilisation de contrôles, de réglages de performances ou de procédures autres que ceux qui sont spécifiés au sein du présent document risquent d'entraîner l'exposition à des rayonnements laser dangereux. Wichtige Sicherheitsinformationen VORSICHT: Die Installation und der Ausbau des Geräts darf nur durch Fachpersonal erfolgen. VORSICHT: Wenn die Switch 4200 Einheit in einer Stapel mit anderen SuperStack 3 Hub Einheiten eingebaut werden soll, muß die Switch 4200 Einheit unter die schmaleren Hub Einheiten eingebaut werden. VORSICHT: Das Gerät muß geerdet sein. DUA1730-0AAA03.book Page 62 Thursday, November 17, 2005 12:17 PM

werden, die europäischen Sicherheitsnormen erfüllt. VORSICHT: Der Anschlußkabelsatz muß mit den Bestimmungen des Landes übereinstimmen, in dem er verwendet werden soll. VORSICHT: Der Gerätestecker (der Anschluß an das Gerät, nicht der Wandsteckdosenstecker) muß eine passende Konfiguration für einen Geräteeingang gemäß EN60320/IEC320 haben. VORSICHT: Die Netzsteckdose muß in der Nähe des Geräts und leicht zugänglich sein. Die Stromversorgung des Geräts kann nur durch Herausziehen des Gerätenetzkabels aus der Netzsteckdose unterbrochen werden. VORSICHT: Europe ■ Das Netzkabel muß vom Typ HO3VVF3GO.75 (Mindestanforderung) sein und die Aufschrift oder tragen. ■ Der Netzstecker muß die Norm CEE 7/7 erfüllen (”SCHUKO”). VORSICHT: Der Betrieb dieses Geräts erfolgt unter den SELV-Bedingungen (Sicherheitskleinstspannung) gemäß IEC 950. Diese Bedingungen sind nur gegeben, wenn auch die an das Gerät angeschlossenen Geräte unter SELV-Bedingungen betrieben werden. VORSICHT: RJ-45-Porte. Diese Porte sind geschützte Datensteckdosen. Sie dürfen weder wie normale traditionelle Telefonsteckdosen noch für die Verbindung der Einheit mit einem traditionellem privatem oder öffentlichem Telefonnetzwerk gebraucht werden. Nur RJ-45-Datenanscluße, Telefonnetzsysteme or Netztelefone an diese Steckdosen anschließen. Entweder geschützte oder ungeschützte Buchsen dürfen an diese Datensteckdosen angeschlossen werden. DUA1730-0AAA03.book Page 63 Thursday, November 17, 2005 12:17 PM

VORSICHT: Faseroptikanschlüsse – Optische Sicherheit Niemals ein Übertragungslaser betrachten, während dieses eingeschaltet ist. Niemals direkt auf die Faseransnchlüsse und auf die Faserkabelenden schauen, während diese eingeschaltet sind. VORSICHT: Die Verwendung von Steuerelementen oder die Anpassung von Leistungen und Verfahren in anderer als der hierin genannten Weise kann zu gefährlichen Laseremissionen führen. Información de seguridad importante ADVERTENCIA: La instalación y la extracción de la unidad sólo debe llevarla a cabo personal cualificado. ADVERTENCIA: si instala el Switch 4200 en una pila con unidades SuperStack II o SuperStack 3 que son más estrechas que el Switch 4200 , el Switch 4200 debe instalarse debajo de las unidades más estrechas. ADVERTENCIA: La unidad debe estar conectada a tierra. ADVERTENCIA: Conecte la unidad a una fuente de alimentación con toma de tierra para garantizar el cumplimiento de las normas de seguridad. DUA1730-0AAA03.book Page 64 Thursday, November 17, 2005 12:17 PM

65 ADVERTENCIA: conjunto de cables eléctricos: debe estar homologado para el país donde se utilice: ADVERTENCIA: el acoplador del equipo (el conector para la unidad y no la toma de la pared) debe tener una configuración que se adapte a una entrada del equipo EN60320/IEC320. ADVERTENCIA: el enchufe debe estar cerca de la unidad y ser de fácil acceso. La única forma de cortar la alimentación de la unidad consiste en desconectar el cable eléctrico de la toma de corriente. ADVERTENCIA: esta unidad funciona en condiciones SELV (voltaje extrabajo de seguridad) de conformidad con la norma IEC 60950. Las condiciones sólo se mantienen si el equipo al que esté conectada la unidad también funciona en condiciones SELV. EE.UU. y Canadá ■ El conjunto de cables debe estar homologado por UL y tener la certificación CSA. ■ La especificación mínima del cable flexible es: ■ Nº 18 AWG ■ Tipo SV o SJ ■ Tres conductores ■ El conjunto de cables debe tener una capacidad de corriente nominal de al menos 10 A. ■ El enchufe de conexión debe ser de tipo de toma de tierra con una configuración NEMA 5-15P (15 A, 125 V) o NEMA 6-15P (15 A, 250 V). Sólo para el Reino Unido ■ La toma de alimentación debe cumplir la norma BS1363 (3 patillas, 13 A) e instalarse con un fusible de 5 A que cumpla BS1362. ■ El cable de alimentación de red debe tener la marca o y ser de tipo H03VVF3GO.75 (mínimo). Sólo para Europa ■ La toma de alimentación debe cumplir la norma CEE 7/7 ("SCHUKO"). ■ El cable de alimentación de red debe tener la marca o y ser de tipo H03VVF3GO.75 (mínimo). Dinamarca ■ La toma de alimentación debe cumplir la sección 107-2-D1 de la norma DK2-1a o DK2-5a. Suiza ■ La toma de alimentación debe cumplir la norma SEV/ASE 1011. DUA1730-0AAA03.book Page 65 Thursday, November 17, 2005 12:17 PM

ADVERTENCIA: sólo para Francia y Perú: esta unidad no puede recibir corriente de fuentes IT†. Si las fuentes de suministro de corriente son de tipo IT, esta unidad debe recibir 230 V (2P+T) a través de un transformador aislador con relación 1:1, con el punto de conexión secundario etiquetado como neutro conectado directamente a tierra. †Impédance à la terre. ADVERTENCIA: puertos RJ-45. Son conectores de datos RJ-45 blindados. No pueden utilizarse como tomas de teléfono tradicionales estándar ni para conectar la unidad a una central de conmutación PBX tradicional ni a una red telefónica pública. Conecte sólo conectores de datos RJ-45, sistemas de telefonía de red local o teléfonos de red local a estas tomas. Es posible conectar cables de datos blindados o sin blindar con clavijas blindadas o sin blindar a estos conectores de datos. ADVERTENCIA: Puertos de fibra óptica: seguridad óptica No mire nunca al láser de transmisión mientras esté encendido. No mire nunca directamente al puerto de transmisión de fibra óptica ni a los extremos del cable de fibra óptica mientras estén conectados. ADVERTENCIA: el uso de controles, ajustes de rendimiento o procedimientos distintos a los especificados en este documento puede producir emisiones de láser peligrosas. Importanti informazioni di sicurezza AVVERTENZA: le operazioni di installazione e rimozione dell'unità devono essere eseguite esclusivamente da personale qualificato. AVVERTENZA: Se si installa Switch 4200 in uno stack con unità SuperStack II o SuperStack 3 più strette di Switch 4200, posizionare Switch 4200 sotto tali unità. DISPOSITIVO LÁSER DE CLASE 1 DUA1730-0AAA03.book Page 66 Thursday, November 17, 2005 12:17 PM

67 AVVERTENZA: L'unità deve disporre di messa a terra. AVVERTENZA:Per rispettare gli standard di sicurezza, è necessario collegare l'unità a una fonte di alimentazione dotata di messa a terra. AVVERTENZA: set dei cavi di alimentazione Deve essere approvato per il paese in cui viene utilizzato. AVVERTENZA: l'accoppiatore (il connettore all'unità e non la spina a muro) deve avere una configurazione abbinabile a una presa EN60320/IEC320. AVVERTENZA: la presa deve trovarsi vicino all'unità ed essere facilmente accessibile. L'unico modo per rimuovere l'alimentazione dall'unità consiste nello scollegare il cavo di alimentazione dalla presa. AVVERTENZA: questa unità funziona alle condizioni SELV (Safety Extra Low Voltage) previste dalla norma IEC 60950. Tali condizioni sono Stati Uniti e Canada ■ "Il cavo deve avere l'approvazione UL e la certificazione CSA ■ "La specifica minima per il cavo flessibile è: N. 18 AWG Tipo SV o SJ 3 conduttori ■ "Il set di cavi deve avere una capacità nominale di almeno 10 A. ■ "La spina di collegamento deve essere dotata di messa a terra, con configurazione NEMA 5-15P (15 A, 125 V) o NEMA 6-15P (15 A, 250 V). Solo Regno Unito ■ "La spina di alimentazione deve essere conforme BS1363 (3 pin 13 amp) e dotata di un fusibile da 5 A conforme BS1362. ■ "Il cavo dell'alimentazione di rete deve essere contrassegnato dai marchi o ed essere di tipo H03VVF3GO.75 (minimo). Solo Europa ■ "La spina di alimentazione deve essere conforme CEE 7/7 (tipo "SCHUKO"). ■ "Il cavo dell'alimentazione di rete deve essere contrassegnato dai marchi o ed essere di tipo H03VVF3GO.75 (minimo). Danimarca ■ "La spina di alimentazione deve essere conforme alla sezione 107-2-D1, standard DK2-1a o DK2 Svizzera ■ "La spina di alimentazione deve essere conforme SEV/ASE 1011 DUA1730-0AAA03.book Page 67 Thursday, November 17, 2005 12:17 PM

mantenute solo se anche l'apparecchiatura a cui è collegata opera nelle stesse condizioni. AVVERTENZA: solo per Francia e Perù. Questa unità non può ricevere alimentazione di tipo IT†. Se l'alimentazione è di tipo IT, l'unità deve essere alimentata a 230 V (2P+T) tramite un trasformatore di isolamento con rapporto 1:1, con il punto di collegamento secondario contrassegnato come Neutro, collegato direttamente a terra. †Impédance à la terre. AVVERTENZA: le porte RJ-45 sono prese dati RJ-45 schermate. Non è pertanto possibile utilizzarle come normali prese telefoniche né per collegare l'unità a un PBX (Private Branch Exchange, centralino telefonico privato) o a una rete telefonica pubblica. Collegare a queste porte solo prese dati RJ-45, sistemi di telefonia o telefoni di rete. A queste prese dati è possibile collegare cavi dati schermati o non schermati con connettori schermati o non schermati. AVVERTENZA: porte a fibre ottiche - Protezione degli occhi Non guardare mai il LED di trasmissione attraverso uno strumento ottico di ingrandimento quando è acceso. Non guardare mai direttamente la porta TX a fibre ottiche e le estremità del cavo a fibre ottiche quando sono accese. AVVERTENZA: l'esecuzione di procedure o regolazioni non previste dalle istruzioni fornite in questa guida può provocare emissioni laser nocive. PRODOTTO LASER CLASSE 1 DUA1730-0AAA03.book Page 68 Thursday, November 17, 2005 12:17 PM

9-pin to RS-232 25-pin PC-AT Serial Cable 9-pin to 9-pin Screen TxD RxD Ground RTS CTS DSR DCD DTR Screen RxD TxD Ground RTS DTR CTS DSR DCD Shell 3 2 5 7 8 6 1 4 1 3 2 7 4 20 5 6 8 Switch 4200 Cable connector: 9-pin female PC/Terminal Cable connector: 25-pin male/female only required if screen always required required for handshake Screen DTR TxD RxD CTS Ground DSR RTS DCD Screen DCD RxD TxD DTR Ground DSR RTS CTS Shell 4 3 2 8 5 6 7 1 Shell 1 2 3 4 5 6 7 8 Switch 4200 Cable connector: 9-pin female PC-AT Serial Port Cable connector: 9-pin female only required if screen always required always required required for handshake required for handshake Required for handshake DUA1730-0AAA03.book Page 69 Thursday, November 17, 2005 12:17 PM

Modem Cable 9-pin to RS-232 25-pin RJ-45 Pin Assignments Pin assignments for ports configured as MDI and MDIX are given in Table 10 and Table 11. Table 10 Pin assignments Screen TxD RxD RTS CTS DSR Ground DCD DTR Screen TxD RxD RTS CTS DSR Ground DCD DTR Shell 3 2 7 8 6 5 1 4 1 2 3 4 5 6 7 8 20 Switch 4200 Cable connector: 9-pin female RS-232 Modem Port Cable connector: 25-pin male Pin Number 10/100 1000 Ports configured as MDI 1 Transmit Data + Bidirectional Data A+ 2 Transmit Data - Bidirectional Data A- 3 Receive Data + Bidirectional Data B+ 4 Not assigned Bidirectional Data C+ 5 Not assigned Bidirectional Data C- 6 Receive Data – Bidirectional Data B- 7 Not assigned Bidirectional Data D+ 8 Not assigned Bidirectional Data D- DUA1730-0AAA03.book Page 70 Thursday, November 17, 2005 12:17 PM

71 Table 11 Pin assignments Pin Number 10/100 1000 Ports configured as MDIX 1 Receive Data + Bidirectional Data B+ 2 Receive Data - Bidirectional Data B- 3 Transmit Data + Bidirectional Data A+ 4 Not assigned Bidirectional Data A- 5 Not assigned Bidirectional Data D+ 6 Transmit Data - Bidirectional Data D- 7 Not assigned Bidirectional Data C+ 8 Not assigned Bidirectional Data C- DUA1730-0AAA03.book Page 71 Thursday, November 17, 2005 12:17 PM

(3C17300A) Physical Dimensions Height: 44 mm (1.7 in.) x Width: 440 mm (17.3 in.) x Depth: 274 mm (10.8 in.) Weight: 2.4 kg (5.3 lbs) Environmental Requirements Operating Temperature 0 ° to 40 °C (32 ° to 104 °F) Storage Temperature –40 ° to +70 °C (-40 ° to 158 °F) Operating Humidity 10–95% relative humidity, non-condensing Standards EN60068 to 3Com schedule (Package testing: paras 2.1, 2.2, 2.30, and 2.32. Operational testing: paras 2.1, 2.2, 2.30 and 2.13). Safety Agency Certifications UL 60950-1, EN60950-1, CSA 22.2 No. 60950-1, IEC 60950-1 EMC Emissions CISPRR 22 Class A, EN55022 Class A, FCC Part 15 Subpart B Class A, ICES-003 Class A, VCCI Class A, EN61000-3-3 Immunity EN 55024 Heat Dissipation 30 watts maximum (102 Btu/h maximum) Power Supply AC Line Frequency 50/60 Hz Input Voltage 100–240 VAC Current Rating 1 A (amp)(maximum) (continued) DUA1730-0AAA03.book Page 73 Thursday, November 17, 2005 12:17 PM

Switch 4200 50-Port (3C17302A) Physical Dimensions Height: 44 mm (1.7 in.) x Width: 440 mm (17.3 in.) x Depth: 274 mm (10.8 in.) Weight: 2.83 kg (6.23 lbs) Environmental Requirements Operating Temperature 0 ° to 40 °C (32 ° to 104 °F) Storage Temperature –40 ° to +70 °C (-40 ° to 158 °F) Operating Humidity 10–95% relative humidity, non-condensing Standards EN60068 to 3Com schedule (Package testing: paras 2.1, 2.2, 2.30, and 2.32. Operational testing: paras 2.1, 2.2, 2.30 and 2.13). Safety Agency Certifications UL60950-1, EN60950-1, CSA 22.2 No. 60950-1, IEC 60950-1 EMC Emissions CISPR 22 Class A, EN55022 Class A, FCC Part 15 Subpart B Class A, ICES-003 Class A, VCCI Class A, EN61000-3-3 Immunity EN 55024 Heat Dissipation 30 watts maximum (102 Btu/h maximum) Power Supply AC Line Frequency 50/60 Hz Input Voltage 100–240 VAC Current Rating 1 A (amps)(maximum) DUA1730-0AAA03.book Page 74 Thursday, November 17, 2005 12:17 PM

75 Switch 4200 28-Port (3C17304A) Physical Dimensions Height: 44 mm (1.7 in.) x Width: 440 mm (17.3 in.) x Depth: 274 mm (10.8 in.) Weight: 2.73 kg (6.00 lbs) Environmental Requirements Operating Temperature 0 ° to 40 °C (32 ° to 104 °F) Storage Temperature –40 ° to +70 °C (-40 ° to 158 °F) Operating Humidity 10–95% relative humidity, non-condensing Standards EN60068 to 3Com schedule (Package testing: paras 2.1, 2.2, 2.30, and 2.32. Operational testing: paras 2.1, 2.2, 2.30 and 2.13). Safety Agency Certifications UL60950-1, EN60950-1, CSA 22.2 No. 60950-1, IEC 60950-1 EMC Emissions CISPR 22 Class A, EN55022 Class A, FCC Part 15 Subpart B Class A, ICES-003 Class A, VCCI Class A, EN61000-3-3 Immunity EN 55024 Heat Dissipation 30 watts maximum (102 Btu/h maximum) Power Supply AC Line Frequency 50/60 Hz Input Voltage 100–240 VAC Current Rating 1 A (amps)(maximum) DUA1730-0AAA03.book Page 75 Thursday, November 17, 2005 12:17 PM

DUA1730-0AAA03.book Page 76 Thursday, November 17, 2005 12:17 PM

PRODUCT Register Your Product Warranty and other service benefits start from the date of purchase, so it is important to register your product quickly to ensure you get full use of the warranty and other service benefits available to you. Warranty and other service benefits are enabled through product registration. Register your product at http://eSupport.3com.com/. 3Com eSupport services are based on accounts that you create or have authorization to access. First time users must apply for a user name and password that provides access to a number of eSupport features including Product Registration, Repair Services, and Service Request. If you have trouble registering your product, please contact 3Com Global Services for assistance. Purchase Value-Added Services To enhance response times or extend warranty benefits, contact 3Com or your authorized 3Com reseller. Value-added services like 3Com ExpressSM and GuardianSM can include 24x7 telephone technical support, software upgrades, onsite assistance or advance hardware replacement. Experienced engineers are available to manage your installation with minimal disruption to your network. Expert assessment and implementation services are offered to fill resource gaps and ensure the success of your networking projects. More information on 3Com maintenance and Professional Services is available at http://www.3com.com/ Contact your authorized 3Com reseller or 3Com for a complete list of the value-added services available in your area. DUA1730-0AAA03.book Page 77 Thursday, November 17, 2005 12:17 PM

Troubleshoot Online You will find support tools posted on the 3Com web site at http://www.3com.com/ 3Com Knowledgebase helps you troubleshoot 3Com products. This query-based interactive tool is located at http://knowledgebase.3com.com and contains thousands of technical solutions written by 3Com support engineers. Access Software Downloads Software Updates are the bug fix / maintenance releases for the version of software initially purchased with the product. In order to access these Software Updates you must first register your product on the 3Com web site at http://eSupport.3com.com/ First time users will need to apply for a user name and password. A link to software downloads can be found at http://eSupport.3com.com/, or under the Product Support heading at http://www.3com.com/ Software Upgrades are the software releases that follow the software version included with your original product. In order to access upgrades and related documentation you must first purchase a service contract from 3Com or your reseller. Telephone Technical Support and Repair To enable telephone support and other service benefits, you must first register your product at http://eSupport.3com.com/ Warranty and other service benefits start from the date of purchase, so it is important to register your product quickly to ensure you get full use of the warranty and other service benefits available to you. When you contact 3Com for assistance, please have the following information ready: ■ Product model name, part number, and serial number ■ Proof of purchase, if you have not pre-registered your product ■ A list of system hardware and software, including revision level ■ Diagnostic error messages ■ Details about recent configuration changes, if applicable DUA1730-0AAA03.book Page 78 Thursday, November 17, 2005 12:17 PM

return authorization number (RMA). Products sent to 3Com, without authorization numbers clearly marked on the outside of the package, will be returned to the sender unopened, at the sender’s expense. If your product is registered and under warranty, you can obtain an RMA number online at http://eSupport.3com.com/. First time users will need to apply for a user name and password. Contact Us 3Com offers telephone, e-mail and internet access to technical support and repair services. To access these services for your region, use the appropriate telephone number, URL or e-mail address from the list below. Telephone numbers are correct at the time of publication. Find a current directory of contact information posted on the 3Com web site at http://csoweb4.3com.com/contactus/ Country Telephone Number Country Telephone Number Asia, Pacific Rim Telephone Technical Support and Repair Australia Hong Kong India Indonesia Japan Malaysia New Zealand Pakistan 1 800 678 515 800 933 486 +61 2 9424 5179 or 000800 650 1111 001 803 61009 00531 616 439 or 03 3507 5984 1800 801 777 0800 446 398 +61 2 9937 5083 Philippines P.R. of China Singapore S. Korea Taiwan Thailand 1235 61 266 2602 or 1800 1 888 9469 800 810 3033 800 6161 463 080 333 3308 00801 611 261 001 800 611 2000 You can also obtain support in this region using the following e-mail: [email protected] Or request a repair authorization number (RMA) by fax using this number: + 65 543 6348 Europe, Middle East, and Africa Telephone Technical Support and Repair From anywhere in these regions, call: +44 (0)1442 435529 From the following countries, you may use the numbers shown: DUA1730-0AAA03.book Page 79 Thursday, November 17, 2005 12:17 PM

Austria Belgium Denmark Finland France Germany Hungary Ireland Israel Italy 01 7956 7124 070 700 770 7010 7289 01080 2783 0825 809 622 01805 404 747 06800 12813 1407 3387 1800 945 3794 199 161346 Luxembourg Netherlands Norway Poland Portugal South Africa Spain Sweden Switzerland U.K. 342 0808128 0900 777 7737 815 33 047 00800 441 1357 707 200 123 0800 995 014 9 021 60455 07711 14453 08488 50112 0870 909 3266 You can also obtain support in this region using the following URL: http://emea.3com.com/support/email.html Latin America Telephone Technical Support and Repair Antigua Argentina Aruba Bahamas Barbados Belize Bermuda Bonaire Brazil Cayman Chile Colombia Costa Rica Curacao Ecuador Dominican Republic 1 800 988 2112 0 810 444 3COM 1 800 998 2112 1 800 998 2112 1 800 998 2112 52 5 201 0010 1 800 998 2112 1 800 998 2112 0800 13 3COM 1 800 998 2112 AT&T +800 998 2112 AT&T +800 998 2112 AT&T +800 998 2112 1 800 998 2112 AT&T +800 998 2112 AT&T +800 998 2112 Guatemala Haiti Honduras Jamaica Martinique Mexico Nicaragua Panama Paraguay Peru Puerto Rico Salvador Trinidad and Tobago Uruguay Venezuela Virgin Islands AT&T +800 998 2112 57 1 657 0888 AT&T +800 998 2112 1 800 998 2112 571 657 0888 01 800 849CARE AT&T +800 998 2112 AT&T +800 998 2112 54 11 4894 1888 AT&T +800 998 2112 1 800 998 2112 AT&T +800 998 2112 1 800 998 2112 AT&T +800 998 2112 AT&T +800 998 2112 57 1 657 0888 You can also obtain support in this region using the following: Spanish speakers, enter the URL: http://lat.3com.com/lat/support/form.html Portuguese speakers, enter the URL: http://lat.3com.com/br/support/form.html English speakers in Latin America should send e-mail to: [email protected] US and Canada Telephone Technical Support and Repair 1 800 876 3266 Country Telephone Number Country Telephone Number DUA1730-0AAA03.book Page 80 Thursday, November 17, 2005 12:17 PM

3C number 22 A access levels of default users 50 automatic setup 42 3Com Network Supervisor 42 console port 42 B browsers choosing 48 C cable choosing the correct 25 fiber 28 maximum length 14 pin-outs 69 CD-ROM 10 command line interface management 45 console port 16 conventions notice icons, About This Guide 8 text, About This Guide 8 cross-over configuration 27 D default settings 17 users 50 E Ethernet address of the Switch 22 F factory defaults 17 H hardware features 12 I installing the Switch 19 prerequisites 20 IP addressing registered 56 IP configuration 33 L LEDs 15 logging in as a default user 50 M MAC address of the Switch 22 management methods 45 preparing for 34 setting up 31, 32 manual setup console port 38 front panel port 35 MDI configuration 27 MDIX configuration 27 P passwords of default users 50 pin assignments modem cable 70 null modem cable 69 RJ45 70 RJ45 1000BASE-T 71 serial cable 69 pin-outs 69 ports 10/100/1000BASE-T ports 14 console 16 SFP ports 14 power socket 16 powering-up a Switch 4200 24 problem solving 53 communication problems 55 DUA1730-0AAA03.book Page 81 Thursday, November 17, 2005 12:17 PM

IP addressing 54 LEDs 54 Solving software upgrade problems 56 stack formation problems 56 product name 22 R rack mounting a Switch 4200 21 S safety information English 58 French 60 German 62 Italian 66 Spanish 64 serial number of the Switch 22 serial port. See console port SFP operation 25 SFP ports 14 SFP transceiver inserting 26 SFP transceivers approved 25 inserting 26 removing 27 Simple Network Management Protocol. See SNMP SNMP 49 SNMP management 46 setting up 49 socket power 16 specifications, system 73 Stacking units 23 straight-through configuration 27 Switch automatic setup 42 Switch 4200 3C number 22 console port 16 dimensions 73 Ethernet address 22 features 12 installation 19, 20 MAC address 22 power socket 16 powering-up 24 product name 22 rack mounting 21 serial number 22 size 73 stacking 23 unit information label 22 weight 73 system specifications 73 T troubleshooting 53 U unit information label 22 W Web browsers choosing 48 web interface choosing a browser 48 web interface management 46 setting up 48 DUA1730-0AAA03.book Page 82 Thursday, November 17, 2005 12:17 PM

part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference to radio communications, in which case the user will be required to correct the interference at their own expense. INFORMATION TO THE USER If this equipment does cause interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: ■Reorient the receiving antenna. ■Relocate the equipment with respect to the receiver. ■Move the equipment away from the receiver. ■Plug the equipment into a different outlet so that equipment and receiver are on different branch circuits. If necessary, the user should consult the dealer or an experienced radio/television technician for additional suggestions. The user may find the following booklet prepared by the Federal Communications Commission helpful: How to Identify and Resolve Radio-TV Interference Problems This booklet is available from the U.S. Government Printing Office, Washington, DC 20402, Stock No. 004-000-00345-4. In order to meet FCC emissions limits, this equipment must be used only with cables which comply with IEEE 802.3. CSA STATEMENT This Class A digital apparatus meets all requirements of the Canadian Interference-Causing Equipment Regulations. Cet appareil numérique de la classe A respecte toutes les exigences du Règlement sur le matériel brouilleur du Canada. CE STATEMENT (EUROPE) This product complies with the European Low Voltage Directive 73/23/EEC and EMC Directive 89/336/EEC as amended by European Directive 93/68/EEC. Warning: This is a class A product. In a domestic environment this product may cause radio interference in which case the user may be required to take adequate measures. A copy of the signed Declaration of Conformity can be downloaded from the Product Support web page for the Switch 4200 Family (3C17300A, 3C17302A, 3C17304A) at http://www.3com.com. Also available at http://support.3Com.com/doc/3C1730XA_EU_DOC.pdf. VCCI STATEMENT DUA1730-0AAA03.book Page 83 Thursday, November 17, 2005 12:17 PM