Cisco ASR 900 Series Release Notes

www.cisco.com Cisco has more than 200 offices worldwide. Addresses, phone numbers, and fax numbers are listed on the Cisco website at www.cisco.com/go/offices. Release Notes for the Cisco ASR 900 Series Routers March 28, 2014 Text Part Number: OL-26630-12

STATEMENTS, INFORMATION, AND RECOMMENDATIONS IN THIS MANUAL ARE BELIEVED TO BE ACCURATE BUT ARE PRESENTED WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED. USERS MUST TAKE FULL RESPONSIBILITY FOR THEIR APPLICATION OF ANY PRODUCTS. THE SOFTWARE LICENSE AND LIMITED WARRANTY FOR THE ACCOMPANYING PRODUCT ARE SET FORTH IN THE INFORMATION PACKET THAT SHIPPED WITH THE PRODUCT AND ARE INCORPORATED HEREIN BY THIS REFERENCE. IF YOU ARE UNABLE TO LOCATE THE SOFTWARE LICENSE OR LIMITED WARRANTY, CONTACT YOUR CISCO REPRESENTATIVE FOR A COPY. The Cisco implementation of TCP header compression is an adaptation of a program developed by the University of California, Berkeley (UCB) as part of UCB’s public domain version of the UNIX operating system. All rights reserved. Copyright © 1981, Regents of the University of California. NOTWITHSTANDING ANY OTHER WARRANTY HEREIN, ALL DOCUMENT FILES AND SOFTWARE OF THESE SUPPLIERS ARE PROVIDED “AS IS” WITH ALL FAULTS. CISCO AND THE ABOVE-NAMED SUPPLIERS DISCLAIM ALL WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING, WITHOUT LIMITATION, THOSE OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OR ARISING FROM A COURSE OF DEALING, USAGE, OR TRADE PRACTICE. IN NO EVENT SHALL CISCO OR ITS SUPPLIERS BE LIABLE FOR ANY INDIRECT, SPECIAL, CONSEQUENTIAL, OR INCIDENTAL DAMAGES, INCLUDING, WITHOUT LIMITATION, LOST PROFITS OR LOSS OR DAMAGE TO DATA ARISING OUT OF THE USE OR INABILITY TO USE THIS MANUAL, EVEN IF CISCO OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. Cisco and the Cisco logo are trademarks or registered trademarks of Cisco and/or its affiliates in the U.S. and other countries. To view a list of Cisco trademarks, go to this URL: www.cisco.com/go/trademarks. Third-party trademarks mentioned are the property of their respective owners. The use of the word partner does not imply a partnership relationship between Cisco and any other company. (1110R) Any Internet Protocol (IP) addresses and phone numbers used in this document are not intended to be actual addresses and phone numbers. Any examples, command display output, network topology diagrams, and other figures included in the document are shown for illustrative purposes only. Any use of actual IP addresses or phone numbers in illustrative content is unintentional and coincidental. Cisco IOS XE 3S Release Notes for the Cisco ASR 903 Router © 2014 Cisco Systems, Inc. All rights reserved.

OL-26630-12 C O N T E N T S Release Notes for the Cisco ASR 903 Router 1-1 Cisco ASR 903 Router Overview 1-1 Feature Navigator 1-2 Software Licensing Overview 1-2 Documentation Roadmap 1-2 Determining the Software Version 1-2 Upgrading to a New Software Release 1-2 Supported ROMmon Versions 1-3 Deferrals 1-3 Field Notices and Bulletins 1-3 MIB Support 1-4 MIB Documentation 1-6 Open Source License Notices 1-6 C H A P T E R 2 New Features in Cisco IOS XE 3.6S Releases 2-1 New Hardware Features in Cisco IOS XE Release 3.6(2)S 2-1 New Hardware Features in Cisco IOS XE Release 3.6(1)S 2-1 New Hardware Features in Cisco IOS XE Release 3.6S 2-1 New Software Features in Cisco IOS XE Release 3.6(2)S 2-2 New Software Features in Cisco IOS XE Release 3.6(1)S 2-2 New Software Features in Cisco IOS XE Release 3.6S 2-4 C H A P T E R 3 New Features in Cisco IOS XE 3.7S Releases 3-1 New Hardware Features in Cisco IOS XE Release 3.7(5)S 3-1 New Hardware Features in Cisco IOS XE Release 3.7(4)S 3-1 New Hardware Features in Cisco IOS XE Release 3.7(3)S 3-2 New Hardware Features in Cisco IOS XE Release 3.7(2)S 3-2 New Hardware Features in Cisco IOS XE Release 3.7(1)aS 3-2 New Hardware Features in Cisco IOS XE Release 3.7(0)S 3-2 New Software Features in Cisco IOS XE Release 3.7(5)S 3-2 New Software Features in Cisco IOS XE Release 3.7(4)S 3-2 New Software Features in Cisco IOS XE Release 3.7(3)S 3-2

OL-26630-12 New Software Features in Cisco IOS XE Release 3.7(2)S 3-2 New Software Features in Cisco IOS XE Release 3.7(1)aS 3-3 New Software Features in Cisco IOS XE Release 3.7(0)S 3-3 C H A P T E R 4 New Features in Cisco IOS XE 3.8S Releases 4-1 New HardwareFeatures in Cisco IOS XE Release 3.8(2)S 4-1 New Hardware Features in Cisco IOS XE Release 3.8(1)S 4-1 New Hardware Features in Cisco IOS XE Release 3.8(0)S 4-1 New SoftwareFeatures in Cisco IOS XE Release 3.8(2)S 4-2 New Software Features in Cisco IOS XE Release 3.8(1)S 4-2 New Software Features in Cisco IOS XE Release 3.8(0)S 4-2 C H A P T E R 5 New Hardware Features in Cisco IOS XE Release 3.9(2)S 5-1 New Software Features in Cisco IOS XE Release 3.9(2)S 5-1 New Hardware Features in Cisco IOS XE Release 3.9(1a)S 5-1 New Software Features in Cisco IOS XE Release 3.9(1a)S 5-2 New Hardware Features in Cisco IOS XE Release 3.9(0)S 5-2 New Software Features in Cisco IOS XE Release 3.9(0)S 5-3 C H A P T E R 6 New Features in Cisco IOS XE 3.10S Releases 6-1 New Hardware Features in Cisco IOS XE Release 3.10.2S 6-1 New Hardware Features in Cisco IOS XE Release 3.10.1S 6-1 DC PEM Module (A900-PWR550-D-E) 6-1 Fan Tray (A903-FAN-E) 6-2 Cable Bracket (A903-CAB-BRACKET) 6-2 Air Plenum 6-2 New Hardware Features in Cisco IOS XE Release 3.10S 6-2 Serial Interface Module 6-2 CWDM SFP 6-3 New Software Features in Cisco IOS XE Release 3.10.2S 6-3 New Software Features in Cisco IOS XE Release 3.10.1S 6-4 New Software Features in Cisco IOS XE Release 3.10S 6-4 C H A P T E R 7 New Features in Cisco IOS XE 3.11S Releases 7-1 New Hardware Features in Cisco IOS XE Release 3.11.1S 7-1 New Software Features in Cisco IOS XE Release 3.11.1S 7-1 New Hardware Features in Cisco IOS XE Release 3.11S 7-1

OL-26630-12 New Software Features in Cisco IOS XE Release 3.11S 7-1 C H A P T E R 8 New Features in Cisco IOS XE 3.12S Releases 8-1 New Hardware Features in Cisco IOS XE Release 3.12.S 8-1 New Software Features in Cisco IOS XE Release 3.12.S 8-1 C H A P T E R 9 Limitations and Restrictions 9-1 Limitations and Restrictions in Cisco IOS XE Release 3.6(2)S 9-1 Limitations and Restrictions in Cisco IOS XE Release 3.6(1)S 9-2 Limitations and Restrictions in Cisco IOS XE Release 3.6S 9-4 Caveats in Cisco IOS XE 3.6S Releases 9-6 Open Caveats—Cisco IOS XE Release 3.6(2)S 9-6 Resolved Caveats—Cisco IOS XE Release 3.6(2)S 9-9 Open Caveats—Cisco IOS XE Release 3.6(1)S 9-11 Resolved Caveats—Cisco IOS XE Release 3.6(1)S 9-13 Open Caveats—Cisco IOS XE Release 3.6(0)S 9-17 Resolved Caveats—Cisco IOS XE Release 3.6(0)S 9-28 C H A P T E R 10 Restrictions and Caveats in Cisco IOS XE 3.7S Releases 10-1 Limitations and Restrictions 10-2 Limitations and Restrictions in Cisco IOS XE Release 3.7(5)S 10-2 Limitations and Restrictions in Cisco IOS XE Release 3.7(4)S 10-2 Limitations and Restrictions in Cisco IOS XE Release 3.7(3)S 10-2 Limitations and Restrictions in Cisco IOS XE Release 3.7(2)S 10-2 Limitations and Restrictions in Cisco IOS XE Release 3.7(1)aS 10-3 Limitations and Restrictions in Cisco IOS XE Release 3.7(0)S 10-3 Caveats in Cisco IOS XE 3.7S Releases 10-5 Open Caveats—Cisco IOS XE Release 3.7(5)S 10-7 Resolved Caveats—Cisco IOS XE Release 3.7(5)S 10-8 Open Caveats—Cisco IOS XE Release 3.7(4)S 10-10 Resolved Caveats—Cisco IOS XE Release 3.7(4)S 10-13 Open Caveats—Cisco IOS XE Release 3.7(3)S 10-21 Resolved Caveats—Cisco IOS XE Release 3.7(3)S 10-24 Open Caveats—Cisco IOS XE Release 3.7(2)S 10-40 Resolved Caveats—Cisco IOS XE Release 3.7(2)S 10-48 Open Caveats—Cisco IOS XE Release 3.7(1)aS 10-50 Resolved Caveats—Cisco IOS XE Release 3.7(1)aS 10-54 Open Caveats—Cisco IOS XE Release 3.7(0)S 10-56 Resolved Caveats—Cisco IOS XE Release 3.7(0)S 10-63

OL-26630-12 C H A P T E R 11 Restrictions and Caveats in Cisco IOS XE 3.8 Releases 11-1 Limitations and Restrictions 11-1 Limitations and Restrictions in Cisco IOS XE Release 3.8(2)S 11-1 Limitations and Restrictions in Cisco IOS XE Release 3.8(1)S 11-1 Limitations and Restrictions in Cisco IOS XE Release 3.8(0)S 11-2 Caveats in Cisco IOS XE 3.8S Releases 11-6 Open Caveats—Cisco IOS XE Release 3.8(2)S 11-7 Resolved Caveats—Cisco IOS XE Release 3.8(2)S 11-12 Open Caveats—Cisco IOS XE Release 3.8(1)S 11-20 Resolved Caveats—Cisco IOS XE Release 3.8(1)S 11-23 Open Caveats—Cisco IOS XE Release 3.8(0)S 11-36 Resolved Caveats—Cisco IOS XE Release 3.8(0)S 11-43 C H A P T E R 12 Restrictions and Caveats in Cisco IOS XE 3.9 Releases 12-1 Limitations and Restrictions 12-1 Caveats in Cisco IOS XE 3.9S Releases 12-5 Open Caveats—Cisco IOS XE Release 3.9(2)S 12-6 Resolved Caveats—Cisco IOS XE Release 3.9(2)S 12-6 Open Caveats—Cisco IOS XE Release 3.9(1a)S 12-14 Resolved Caveats—Cisco IOS XE Release 3.9(1a)S 12-18 Open Caveats—Cisco IOS XE Release 3.9(0)S 12-27 Resolved Caveats—Cisco IOS XE Release 3.9(0)S 12-31 C H A P T E R 13 Restrictions and Caveats in Cisco IOS XE 3.10 Releases 13-1 Limitations and Restrictions 13-1 Caveats in Cisco IOS XE 3.10S Releases 13-2 Resolved Caveats—Cisco IOS XE Release 3.10.(2)aS 13-2 Open Caveats—Cisco IOS XE Release 3.10.2S 13-3 Resolved Caveats—Cisco IOS XE Release 3.10.2S 13-4 Open Caveats—Cisco IOS XE Release 3.10.1S 13-8 Resolved Caveats—Cisco IOS XE Release 3.10.1S 13-11 Open Caveats—Cisco IOS XE Release 3.10S 13-16 Resolved Caveats—Cisco IOS XE Release 3.10S 13-19 C H A P T E R 14 Restrictions and Caveats in Cisco IOS XE 3.11 Releases 14-1 Caveats in Cisco IOS XE 3.11S Releases 14-1 Open Caveats—Cisco IOS XE Release 3.11.1S 14-2 Resolved Caveats—Cisco IOS XE Release 3.11.1S 14-3

OL-26630-12 Open Caveats—Cisco IOS XE Release 3.11S 14-5 Resolved Caveats—Cisco IOS XE Release 3.11S 14-5 C H A P T E R 15 Restrictions and Caveats in Cisco IOS XE 3.12S Releases 15-1 Caveats in Cisco IOS XE 3.12S Releases 15-2 Open Caveats—Cisco IOS XE Release 3.12S 15-3 Resolved Caveats—Cisco IOS XE Release 3.12S 15-3

OL-26630-12 Release Notes for the Cisco ASR 903 Router The Cisco ASR 903 Router runs the Cisco IOS XE software beginning with Release 3.5.0S. This document provides information about the IOS XE software release for the Cisco ASR 903 Router beginning with Release 3.6(0)S. Note For information about Cisco IOS Release 3.5, see the Release Notes for Cisco IOS XE Release 3S. The following sections provide an overview of the Cisco ASR 903 Router and Cisco IOS XE releases: • Cisco ASR 903 Router Overview, page 1 • Feature Navigator, page 2 • Documentation Roadmap, page 2 • Determining the Software Version, page 2 • Upgrading to a New Software Release, page 2 • Deferrals, page 3 • MIB Support, page 4 • Open Source License Notices, page 6 Cisco ASR 903 Router Overview The Cisco ASR 903 Router is a fully-featured routing platform designed for the cost-effective delivery of converged mobile and business services. With full redundancy, shallow depth, low power consumption and high service scale, this 3-rack-unit (3RU) router is optimized for small aggregation and remote point-of-presence (POP) applications. The Cisco ASR 903 Router provides a rich and scalable feature set of Legacy, Timing, Carrier Ethernet, Layer 2 VPN (L2VPN) and Layer 3 VPN (L3VPN) services in a compact package. The Cisco ASR 903 Router is a fully modular platform with support for 6-Interface Modules (IMs), two Route Switch Processor (RSP) slots, two power supplies and redundant fans. Cisco offers a wide choice of LAN and WAN interfaces available in speeds ranging from nxDS0 to 10 Gigabit Ethernet. The design of the Cisco ASR 903 Router delivers in-box hardware redundancy for all hardware components and supports software redundancy with In Service Software Upgrade (ISSU) and Non-Stop Forwarding (NSF) support. Text Part Number: OL-26630-05

OL-26630-12 Chapter Feature Navigator Feature Navigator You can use Cisco Feature Navigator to find information about feature, platform, and software image support. To access Cisco Feature Navigator, go to http://www.cisco.com/go/cfn. An account on cisco.com is not required. Software Licensing Overview The Cisco ASR 903 Router offers the following base licenses: • Metro Services • Metro IP Services • Metro Aggregation Services The Cisco ASR 903 Router offers the following additional feature licenses: • ATM • IEEE 1588-2008 Boundary Clock/Master Clock • OC-3 Port License Note These features require a software license to use. For more information about each software license including part numbers, see the Cisco ASR 903 Router Datasheet. For instructions on how to install licenses on the Cisco ASR 903 Router, see the Software Activation Configuration Guide, Cisco IOS XE Release 3S. Documentation Roadmap To view other documents for the Cisco ASR 903 Router, see the Cisco ASR 903 Router Documentation Roadmap. Determining the Software Version You can use the following commands to verify your software version: • Consolidated Package—show version • Individual sub-packages—show version installed (lists all installed packages) Upgrading to a New Software Release Only Cisco IOS XE 3S consolidated packages can be downloaded from Cisco.com; users who want to run the router using individual subpackages must first download the image from Cisco.com and extract the individual subpackages from the consolidated package.

OL-26630-12 Chapter Supported ROMmon Versions For information about upgrading to a new software release, see the Cisco ASR 903 Router Chassis Software Configuration Guide at http://www.cisco.com/en/US/docs/routers/asr903/software/guide/chassis/Release3.7.0S/ASR903-Chas sis-SW-39.html. Supported ROMmon Versions 15.3(2r)S is the recommended ROMmon version for IOS XE 3.5, 3.6, 3.7, 3.8, and 3.9 software releases. Deferrals Cisco IOS software images are subject to deferral. We recommend that you view the deferral notices at the following location to determine whether your software release is affected: http://www.cisco.com/en/US/products/products_security_advisories_listing.html Field Notices and Bulletins • Field Notices—We recommend that you view the field notices for this release to determine whether your software or hardware platforms are affected. You can find field notices at http://www.cisco.com/en/US/support/tsd_products_field_notice_summary.html. • Bulletins—You can find bulletins at http://www.cisco.com/en/US/products/sw/iosswrel/ps5012/prod_literature.html.

OL-26630-12 Chapter MIB Support MIB Support This section describes the MIB support on the Cisco ASR 903 Router. • Table 1 summarizes the supported MIBs on the Cisco ASR 903 Router: Table 1 Supported MIBs Supported MIBs BGP4-MIB (RFC 1657) CISCO-IMAGE-LICENSE-MGMT- MIB MPLS-LDP-STD-MIB (RFC 3815) CISCO-BGP-POLICY-ACCOUNTIN G-MIB CISCO-IMAGE-MIB MPLS-LSR-STD-MIB (RFC 3813) CISCO-BGP4-MIB CISCO-IPMROUTE-MIB MPLS-TP-MIB CISCO-BULK-FILE-MIB CISCO-LICENSE-MGMT-MIB MSDP-MIB CISCO-CBP-TARGET-MIB CISCO-MVPN-MIB NOTIFICATION-LOG-MIB (RFC 3014) CISCO-CDP-MIB CISCO-NETSYNC-MIB OSPF-MIB (RFC 1850) CISCO-CEF-MIB CISCO-OSPF-MIB (draft-ietf-ospf-mib-update-05) OSPF-TRAP-MIB (RFC 1850) CISCO-CLASS-BASED-QOS-MIB CISCO-OSPF-TRAP-MIB (draft-ietf-ospf-mib-update-05) PIM-MIB (RFC 2934) CISCO-CONFIG-COPY-MIB CISCO-PIM-MIB RFC1213-MIB CISCO-CONFIG-MAN-MIB CISCO-PROCESS-MIB RFC2982-MIB CISCO-DATA-COLLECTION-MIB CISCO-PRODUCTS-MIB RMON-MIB (RFC 1757) CISCO-EMBEDDED-EVENT-MGR- MIB CISCO-PTP-MIB RSVP-MIB CISCO-ENHANCED-MEMPOOL-M IB CISCO-RF-MIB SNMP-COMMUNITY-MIB (RFC 2576) CISCO-ENTITY-ALARM-MIB CISCO-RTTMON-MIB SNMP-FRAMEWORK-MIB (RFC 2571) CISCO-ENTITY-EXT-MIB CISCO-SONET-MIB SNMP-MPD-MIB (RFC 2572) CISCO-ENTITY-FRU-CONTROL- MIB CISCO-SYSLOG-MIB SNMP-NOTIFICATION-MIB (RFC 2573) CISCO-ENTITY-SENSOR-MIB DS1-MIB (RFC 2495) SNMP-PROXY-MIB (RFC 2573) CISCO-ENTITY-VENDORTYPE-OI D-MIB ENTITY-MIB (RFC 4133) SNMP-TARGET-MIB (RFC 2573) CISCO-FLASH-MIB ENTITY-SENSOR-MIB (RFC 3433) SNMP-USM-MIB (RFC 2574) CISCO-FTP-CLIENT-MIB ENTITY-STATE-MIB SNMPv2-MIB (RFC 1907) CISCO-IETF-ISIS-MIB EVENT-MIB (RFC 2981) SNMPv2-SMI CISCO-IETF-PW-ATM-MIB ETHERLIKE-MIB (RFC 3635) SNMP-VIEW-BASED-ACM-MIB (RFC 2575) CISCO-IETF-PW-ENET-MIB IF-MIB (RFC 2863) SONET-MIB CISCO-IETF-PW-MIB IGMP-STD-MIB (RFC 2933) TCP-MIB (RFC 4022) CISCO-IETF-PW-MPLS-MIB IP-FORWARD-MIB TUNNEL-MIB (RFC 4087)

OL-26630-12 Chapter MIB Support Table 2 summarizes the unverified and supported MIBs on the Cisco ASR 903 Router. CISCO-IETF-PW-TDM-MIB IP-MIB (RFC 4293) UDP-MIB (RFC 4113) CISCO-IF-EXTENSION-MIB IPMROUTE-STD-MIB (RFC 2932) CISCO-IGMP-FILTER-MIB MPLS-LDP-GENERIC-STD-MIB (RFC 3815) Table 1 Supported MIBs Supported MIBs Table 2 Unverified and Supported MIBs Unverified MIBs ATM-MIB CISCO-IETF-DHCP-SERVER-EXT-MI B EXPRESSION-MIB CISCO-ATM-EXT-MIB CISCO-IETF-MPLS-TE-P2MP-STD-M IB HC-ALARM-MIB CISCO-ATM-IF-MIB CISCO-IETF-PPVPN-MPLS-VPN-MI B HC-RMON-MIB CISCO-ATM-PVC-MIB CISCO-IP-STAT-MIB IEEE8021-CFM-MIB CISCO-ATM-PVCTRAP-EXTN-MIB CISCO-IPSLA-ETHERNET-MIB IEEE8021-CFM-V2-MIB CISCO-BCP-MIB CISCO-L2-CONTROL-MIB IEEE8023-LAG-MIB CISCO-CALLHOME-MIB CISCO-LAG-MIB INT-SERV-GUARANTEED-MIB CISCO-CIRCUIT-INTERFACE-MIB CISCO-MAC-NOTIFICATION-MIB INTEGRATED-SERVICES-MIB CISCO-CONTEXT-MAPPING-MIB CISCO-MEMORY-POOL-MIB MPLS-L3VPN-STD-MIB (RFC 4382) CISCO-EIGRP-MIB CISCO-NHRP-EXT-MIB MPLS-LDP-ATM-STD-MIB (RFC 3815) CISCO-ERM-MIB CISCO-NTP-MIB MPLS-LDP-MIB CISCO-ETHER-CFM-MIB CISCO-PING-MIB MPLS-TE-STD-MIB CISCO-ETHERLIKE-EXT-MIB CISCO-RESILIENT-ETHERNET-PRO TOCOL-MIB MPLS-VPN-MIB CISCO-EVC-MIB CISCO-RTTMON-ICMP-MIB NHRP-MIB CISCO-HSRP-EXT-MIB CISCO-RTTMON-IP-EXT-MIB RFC2006-MIB (MIP) CISCO-HSRP-MIB CISCO-RTTMON-RTP-MIB RMON2-MIB (RFC 2021) CISCO-IETF-ATM2-PVCTRAP-MIB CISCO-SNMP-TARGET-EXT-MIB SMON-MIB CISCO-IETF-ATM2-PVCTRAP-MIB- EXTN CISCO-TCP-MIB VRRP-MIB CISCO-IETF-BFD-MIB CISCO-VRF-MIB CISCO-IETF-DHCP-SERVER-MIB ETHER-WIS (RFC 3637)

OL-26630-12 Chapter Open Source License Notices MIB Documentation The following resources provide more detail about MIBs on the Cisco ASR 903 Router: • Cisco ASR 903 Router MIB Guide—For information about the Cisco ASR 903 Series Router product implementation of the MIB protocol, see Cisco ASR 903 Series Aggregation Services Router MIB Specifications Guide at the following location: http://www.cisco.com/en/US/docs/wireless/asr_900/mib/guide/asr903mib.html • MIB Locator—To locate and download MIBs for selected platforms, Cisco IOS and Cisco IOS XE releases, and feature sets, use Cisco MIB Locator found at the following location: http://tools.cisco.com/ITDIT/MIBS/servlet/index To access Cisco MIB Locator, you must have an account on Cisco.com. If you have forgotten or lost your account information, send a blank e-mail to [email protected]. An automatic check will verify that your e-mail address is registered with Cisco.com. If the check is successful, account details with a new random password will be e-mailed to you. Qualified users can establish an account on Cisco.com by following the directions found at the following location: http://tools.cisco.com/RPF/register/register.do Open Source License Notices For a listing of the license notices for open source software used in Cisco IOS XE 3S Releases, see the documents accessible from the License Information page at the following location: http://www.cisco.com/en/US/products/ps11174/products_licensing_information_listing.html

1 Cisco IOS XE 3S Release Notes for the Cisco ASR 903 Router OL-26630-12 2 New Features in Cisco IOS XE 3.6S Releases This chapter provides information about the new features introduced in the Cisco IOS XE Release 3.6S. Note Cisco IOS XE 3.6S inherits all supported features from Cisco IOS Release 3.5, which is not described in this document. For more information about Cisco IOS Release 3.5, see the Release Notes for Cisco IOS XE Release 3S. This chapter includes the following sections: • New Hardware Features in Cisco IOS XE Release 3.6(2)S, page 1 • New Hardware Features in Cisco IOS XE Release 3.6(1)S, page 1 • New Hardware Features in Cisco IOS XE Release 3.6S, page 1 • New Software Features in Cisco IOS XE Release 3.6(2)S, page 2 • New Software Features in Cisco IOS XE Release 3.6(1)S, page 2 • New Software Features in Cisco IOS XE Release 3.6S, page 4 New Hardware Features in Cisco IOS XE Release 3.6(2)S The IOS XE 3.6(2)S Release for the Cisco ASR 903 Router does not introduce any new hardware features. New Hardware Features in Cisco IOS XE Release 3.6(1)S The IOS XE 3.6(1)S Release for the Cisco ASR 903 Router does not introduce any new hardware features. New Hardware Features in Cisco IOS XE Release 3.6S The IOS XE 3.6(0)S Release for the Cisco ASR 903 Router introduces support for the following hardware features: • New SFP modules—This release introduces support for the following SFP modules: – 1000M SFP-DWDM-SFP

OL-26630-12 Chapter New Software Features in Cisco IOS XE Release 3.6(2)S – 1000M SFP-CWDM – 1000M SFP - GLC-ZX-SMD – 1000M SFP - GLC-SX-MMD – 1000M SFP - GLC-LH-SMD – ONS-SI-155-SR-MM – ONS-SI-155-I1 – ONS-SI-155-L1 – ONS-SI-155-L2 • 4-Port OC3/STM-1 or 1-Port OC12/STM-4 Interface Module—This release introduces support for the A900-IMA4OS interface module. This combo module supports one of four modes: 4xOC3, 4xSTM-1, 1xOC12, and 1xSTM-4. The module supports SDH framing and HDLC encapsulation. Note The A900-IMA4OS Interface Module requires a license for use. For more information about supported licenses, see Software Licensing Overview, page 2. Note IOS XE Release 3.6 for the offers a limited set of software features for the A900-IMA4OS Interface Module. For more information, see http://www.cisco.com/en/US/docs/wireless/asr_900/software/guide/chassis/Release3.6.0S/AS R903-Chassis-SW-36.html New Software Features in Cisco IOS XE Release 3.6(2)S The IOS XE 3.6(2)S Release for the Cisco ASR 903 Router does not introduce any new software features. New Software Features in Cisco IOS XE Release 3.6(1)S The following are the new software features introduced in Cisco IOS XE Release 3.6(1)S: • OC-3 Interface Module Software Features—Release 3.6(1) introduces support for PPP and MLPPP the OC-3 interface module. For details about this feature, see: – http://www.cisco.com/en/US/docs/wireless/asr_900/software/guide/chassis/Release3.6.0S/OC_I fc_Module.html – http://www.cisco.com/en/US/docs/wireless/asr_900/software/guide/chassis/Release3.6.0S/pseud owire.html – http://www.cisco.com/en/US/docs/ios/ios_xe/atm/configuration/guide/xe_3s/atm_xe_3s_book.ht ml – http://www.cisco.com/en/US/docs/ios/dial/configuration/guide/dia_media-ind_multi_ppp.html – http://www.cisco.com/en/US/docs/ios/dial/configuration/guide/dia_async_slip_ppp.html

OL-26630-12 Chapter New Software Features in Cisco IOS XE Release 3.6(1)S • PPP MRRU Negotiation Configuration—Introduces support for the ppp multilink mrru command, which allows you to specify a Maximum-Receive-Reconstructed-Unit (MRRU) value on MLP interfaces and member links after a change in the MTU value on the interface. For details about this feature, see http://www.cisco.com/en/US/docs/ios/dial/configuration/guide/dia_pppmlp_mrru_neg.html. • ACFC and PFC Support on Multilink Interfaces—Using the Address and Control Field Compression (ACFC) and PPP Protocol Field Compression (PFC) Support on Multilink Interfaces feature, you can control the negotiation and application of the Link Control Protocol (LCP) configuration options for ACFC and PFC. This release introduces support for ACFC and PFC support on serial interfaces on the T1/E1 and optical interface modules. This feature includes support for the following commands: – ppp acfc local {request | forbid} – ppp acfc remote {apply | reject | ignore} – ppp pfc local {request | forbid} – ppp pfc remote {apply | reject | ignore} For more information about configuring ACFC and PFC, see the following documents – http://www.cisco.com/en/US/partner/docs/interfaces_modules/shared_port_adapters/configurati on/7600series/76cfgsip.html#wp1372108 – http://www.cisco.com/en/US/partner/docs/routers/7600/install_config/flexwan_config/features.h tml#wp256581 • Egress QoS policies on main physical interface for port shaping + H-policies on EFP—Previous releases did not support QoS policies on interfaces configured with an Ethernet Flow Point (EFP) or port-channel member links with EFPs. This release introduces support for hierarchical QoS policies on EFP interfaces. For more information about how to configure QoS on EFP interfaces, see http://www.cisco.com/en/US/docs/wireless/asr_900/software/guide/chassis/Release3.6.0S/ASR90 3-Chassis-SW-36.html • Switch Port Analyzer—Release 3.6.1 introduces support for Switch Port Analyzer (SPAN) on physical interfaces. The following commands are supported: – monitor session {session_number} {source {interface slot/port}} [, | - | rx | tx | both] – monitor session {session_number} {destination {interface type/num} [, | - ]} For more information about SPAN, see http://www.cisco.com/en/US/docs/wireless/asr_900/feature/guides/SPAN.html • Support for MPLS Labels with PTP traffic- This release introduces support for MPLS labels with PTP Delay-Request packets. The following encapsulation types are supported: – VPN – BGP IPv4 – LDP – FRR The router adds time stamps to MPLS-encapsulated PTP packets by default. • Reverse Path Forwarding failure handling—This release introduces support for the platform multicast rpf_fail_handling enable command. The Cisco ASR 903 Router hardware does not handle RPF fail packets default; you can use this command to enable RPF fail packets handling.

OL-26630-12 Chapter New Software Features in Cisco IOS XE Release 3.6S New Software Features in Cisco IOS XE Release 3.6S The following are the new software features introduced in Cisco IOS XE Release 3.6S: Note Many of the features supported on the Cisco ASR 903 Router require a license for use. For more information about supported licenses, see Software Licensing Overview, page 2. • Any Transport over MPLS (AToM)—ATM AAL5 over MPLS (AAL5oMPLS)—The AAL5 Transport over MPLS feature provides an ATM permanent virtual circuit (PVC) transport service for transporting AAL5 PDUs across an IP/MPLS backbone with rate-limit policing and configurable PVC priority value. A dynamic MPLS tunnel is configured to enable label imposition and disposition of encapsulated ATM PDUs transported between two edge routers having a Label Distribution Protocol (LDP) neighbor relationship. For details about this feature, see: – http://www.cisco.com/en/US/docs/ios-xml/ios/mp_l2_vpns/configuration/15-2s/mp-any-transpo rt.html – http://www.cisco.com/en/US/docs/ios/ios_xe/mpls/configuration/guide/mp_any_transport_xe.ht ml – http://www.cisco.com/en/US/docs/ios/mpls/configuration/guide/mp_any_transport.html – http://www.cisco.com/en/US/docs/wireless/asr_900/software/guide/chassis/Release3.6.0S/ASR 903-Chassis-SW-36.html • BFD IPv6 Encapsulation—This feature introduces support for IPv6 addresses with the BFD protocol. For details about this feature, see http://www.cisco.com/en/US/docs/ios/ipv6/configuration/guide/ip6-bfd.html • BGP PIC Edge for IP/MPLS—This feature introduces support for BGP PIC Edge for IP/MPLS for sub-second convergence for IP and MPLS-VPN. For details about this feature, see: – http://www.cisco.com/en/US/partner/docs/ios-xml/ios/iproute_bgp/configuration/xe-3s/asr903/ir g-xe-3s-asr903-book.html – http://www.cisco.com/en/US/docs/ios/iproute_bgp/configuration/guide/irg_bgp_mp_pic.html – http://www.cisco.com/en/US/docs/ios-xml/ios/iproute_bgp/configuration/15-2mt/irg-bgp-mp-pi c.html • CFM over EFP interface with xconnect—This feature provides support for IEEE 802.1ag draft 8.1-compliant CFM functionality on pseudowire & VFI interfaces. For details about this feature, see: – http://www.cisco.com/en/US/docs/wireless/asr_900/feature/guides/CFM_EFP_xconnect.html – http://www.cisco.com/en/US/docs/routers/7600/install_config/ES40_config_guide/es40_chap4. html • CFM on Port-Channel Interfaces—This feature provides support for IEEE 802.1ag (CFM) on port-channel interfaces for end-to-end connectivity fault management on Ethernet networks. For details about this feature, see: – http://www.cisco.com/en/US/docs/ios/cether/configuration/guide/ce_cfm.html – http://www.cisco.com/en/US/docs/ios/ipsla/configuration/guide/sla_metro_ethernet.html – http://www.cisco.com/en/US/partner/docs/ios-xml/ios/cether/configuration/xe-3s/ce-cfm.html

OL-26630-12 Chapter New Software Features in Cisco IOS XE Release 3.6S • Class-based QoS MIB—This feature introduces support for the class-based QoS MIB. For details about this feature, see http://www.cisco.com/en/US/docs/wireless/asr_900/mib/guide/asr903mib.html • Egress QoS Marking—This feature introduces support for QoS marking on egress interfaces. For details about this feature, see http://www.cisco.com/en/US/docs/wireless/asr_900/software/guide/chassis/Release3.6.0S/ASR90 3-Chassis-SW-36.html • Egress QoS Policing—This feature introduces support for QoS policing on egress interfaces. For details about this feature, see http://www.cisco.com/en/US/docs/wireless/asr_900/software/guide/chassis/Release3.6.0S/ASR90 3-Chassis-SW-36.html • E-OAM-CFM CCM Hardware Offload—The router automatically offloads processing of Continuity Check (CC) messages if the CC interval is less than 1 second. • H-VPLS N-PE Redundancy for MPLS Access—This feature allows user provider (U-PE) devices to be dual-homed to network provider edge (N-PE) devices in a loop-free topology with MPLS as the access/aggregation domain. For details about this feature, see: – http://www.cisco.com/en/US/docs/ios-xml/ios/mp_l2_vpns/configuration/12-2sy/mp-hvpls-npe- red.html – http://www.cisco.com/en/US/docs/ios-xml/ios/mp_l2_vpns/configuration/xe-3s/mp-hvpls-npe-r ed.html • IPv6 Quality of Service Classification—This feature allows you to define traffic classes, create and configure traffic policies (policy maps), and attach those traffic policies to interfaces. The Cisco ASR 903 Router supports classification of IPv6 traffic based on DSCP or Precedence values on ingress and egress interfaces. For details about this feature, see – http://www.cisco.com/en/US/docs/ios-xml/ios/ipv6/configuration/xe-3s/ip6-qos.html – http://www.cisco.com/en/US/docs/wireless/asr_900/software/guide/chassis/Release3.6.0S/ASR 903-Chassis-SW-36.html • IPv6 Quality of Service Marking—This feature introduces support for marking IPv6 traffic with DSCP or Precedence values. IPv6 QoS is supported on ingress and egress interfaces. For details about this feature, see – http://www.cisco.com/en/US/docs/ios/ios_xe/ipv6/configuration/guide/ip6-qos_xe.html – http://www.cisco.com/en/US/docs/ios/ipv6/configuration/guide/ip6-qos.html – http://www.cisco.com/en/US/docs/wireless/asr_900/software/guide/chassis/Release3.6.0S/ASR 903-Chassis-SW-36.html • ISIS IPv4 Loop Free Alternate Fast ReRoute (LFA FRR) for VPLS Core—IPFRR (IP Fast ReRoute) is a set of technologies used in order to rapidly converge traffic flows around link and/or node failures. For details about this feature, see http://www.cisco.com/en/US/docs/ios/iproute_isis/configuration/guide/irs_ipv4_lfafrr.html • ITU-T G.8032 Ethernet Ring Protection Switching—This feature implements protection switching mechanisms for Ethernet layer ring topologies. This feature uses the G.8032 Ethernet Ring Protection (ERP) protocol, defined in ITU-T G.8032, to provide protection for Ethernet traffic in a ring topology, while ensuring that there are no loops within the ring at the Ethernet layer. The loops are prevented by blocking either a pre-determined link or a failed link. For details about this feature, see http://www.cisco.com/en/US/docs/ios-xml/ios/cether/configuration/xe-3s/ce-g8032-ering-pro.html

OL-26630-12 Chapter New Software Features in Cisco IOS XE Release 3.6S • L2 ACL on Service Instance—This is a security feature which customers can apply to an EVC interface to filter packets based on their MAC address. For details about this feature, see http://www.cisco.com/en/US/docs/ios-xml/ios/cether/configuration/xe-3s/ce-l2acl-evc.html • L2PT - Layer 2 Protocol Tunneling on Trunk Ports—Layer 2 protocol tunneling makes control protocol PDUs such as STP, CDP, and VTP, transparent to the service provider cloud when passing traffic through trunk ports. For details about this feature, see http://www.cisco.com/en/US/docs/ios-xml/ios/wan_lserv/configuration/xe-3s/wan-lserv-xe-3s-boo k.html • MLPPP - Multilink PPP—Multilink PPP (also referred to as MP, MPPP, MLP, or Multilink) provides a method for spreading traffic across multiple physical WAN links and is described in RFC1990. For details about this feature, see: – http://www.cisco.com/en/US/docs/ios/dial/configuration/guide/dia_media-ind_multi_ppp.html Note Limitations apply when configuring MLPPP. For more information, see Chapter 9, “Restrictions and Caveats in Cisco IOS XE 3.6S Releases.” • MPLS Traffic Engineering (TE) - Fast Reroute (FRR) Link and Node Protection—This feature introduces support for MPLS Traffic Engineering (TE) - Fast Reroute (FRR) Link and Node Protection. For details about this feature, see http://www.cisco.com/en/US/docs/ios-xml/ios/mp_te_path_protect/configuration/xe-3s/mp-te-frr- node-prot.html • Multiple Matching Commands—This feature introduces support for multiple match or match-any commands in a given QoS class-map. For details about this feature, see http://www.cisco.com/en/US/docs/wireless/asr_900/software/guide/chassis/Release3.6.0S/ASR90 3-Chassis-SW-36.html • Port-Shaper and LLQ in the presence of EFPs—This feature allows you to create a QoS policy to shape traffic across all EFPs on a given physical port. —For details about this feature, see http://www.cisco.com/en/US/docs/ios-xml/ios/qos_plcshp/configuration/xe-3s/qos-plcshp-ehqos-p shape.html • PPP—This feature introduces support for PPP, which provides a method for transmitting datagrams over serial point-to-point links. For details about this feature, see http://www.cisco.com/en/US/docs/ios/dial/configuration/guide/dia_async_slip_ppp.html • Static Route Support for BFD over IPv6—This feature introduces support for static routes for BFD using IPv6 addressing. For details about this feature, see: – http://www.cisco.com/en/US/docs/ios-xml/ios/ipv6/configuration/xe-3s/ip6-bfd-static-xe.html – http://www.cisco.com/en/US/docs/ios/ipv6/configuration/guide/ip6-bfd.html • Static VPLS over MPLS-TP—This feature introduces support for static VPLS over MPLS-TP. For details about this feature, see http://www.cisco.com/en/US/docs/ios/ipv6/configuration/guide/ip6-bfd.html • STM-1 support—This feature adds support for STM1 mode on Cisco ASR 903 Router in concatenated and channelized mode to the DS1 level. For details about this feature, see http://www.cisco.com/en/US/docs/wireless/asr_900/software/guide/chassis/Release3.6.0S/ASR90 3-Chassis-SW-36.html • Support for Low Latency Queuing on Multiple EFPs—This feature allows you to apply a QoS policy for Low Latency Queuing to multiple EFP interfaces. For details about this feature, see http://www.cisco.com/en/US/docs/ios-xml/ios/qos_plcshp/configuration/xe-3s/qos-plcshp-ehqos-p shape.html.

OL-26630-12 Chapter New Software Features in Cisco IOS XE Release 3.6S • Support for Weighted Random Early Detection—This feature introduces support for Weighted Random Early Detection (WRED) for congestion avoidance on egress interfaces. For details about this feature, see: – http://www.cisco.com/en/US/docs/ios-xml/ios/qos_conavd/configuration/xe-3s/qos-conavd-diffs erv-wred.html – http://www.cisco.com/en/US/docs/ios/qos/configuration/guide/config_wred.html – http://www.cisco.com/en/US/products/hw/routers/ps133/products_configuration_guide_book09 186a00805b9497.html – http://www.cisco.com/en/US/docs/wireless/asr_900/software/guide/chassis/Release3.6.0S/ASR 903-Chassis-SW-36.html • Y.1731 Performance Monitoring—Y.1731-PM provides a standards-based Ethernet performance monitoring function, which encompasses measurement of Ethernet frame delay, frame delay variation, frame loss, and frame throughput as outlined in the ITU-T Y-1731 specification and interpreted by the Metro Ethernet Forum (MEF) standards group. For details about this feature, see: – http://www.cisco.com/en/US/docs/ios-xml/ios/cether/configuration/xe-3s/ce-y1731-perfmon.ht ml – http://www.cisco.com/en/US/docs/ios/cether/configuration/guide/ce_y1731-perfmon.html

OL-26630-12 Chapter New Software Features in Cisco IOS XE Release 3.6S

1 Cisco IOS XE 3S Release Notes for the Cisco ASR 903 Router OL-26630-12 3 New Features in Cisco IOS XE 3.7S Releases This chapter provides information about the new features introduced in the Cisco IOS XE Release 3.7S. Note Cisco IOS XE 3.7S inherits all supported features from Cisco IOS Release 3.5, which is not described in this document. For more information about Cisco IOS Release 3.5, see the Release Notes for Cisco IOS XE Release 3S. This chapter includes the following sections: • New Hardware Features in Cisco IOS XE Release 3.7(5)S, page 1 • New Hardware Features in Cisco IOS XE Release 3.7(4)S, page 1 • New Hardware Features in Cisco IOS XE Release 3.7(3)S, page 2 • New Hardware Features in Cisco IOS XE Release 3.7(2)S, page 2 • New Hardware Features in Cisco IOS XE Release 3.7(1)aS, page 2 • New Hardware Features in Cisco IOS XE Release 3.7(0)S, page 2 • New Software Features in Cisco IOS XE Release 3.7(5)S, page 2 • New Software Features in Cisco IOS XE Release 3.7(4)S, page 2 • New Software Features in Cisco IOS XE Release 3.7(3)S, page 2 • New Software Features in Cisco IOS XE Release 3.7(2)S, page 2 • New Software Features in Cisco IOS XE Release 3.7(1)aS, page 3 • New Software Features in Cisco IOS XE Release 3.7(0)S, page 3 New Hardware Features in Cisco IOS XE Release 3.7(5)S The IOS XE 3.7(5)S Release for the Cisco ASR 903 Router does not introduce any new hardware features. New Hardware Features in Cisco IOS XE Release 3.7(4)S The IOS XE 3.7(4)S Release for the Cisco ASR 903 Router does not introduce any new hardware features.

OL-26630-12 Chapter New Hardware Features in Cisco IOS XE Release 3.7(3)S New Hardware Features in Cisco IOS XE Release 3.7(3)S The IOS XE 3.7(3)S Release for the Cisco ASR 903 Router does not introduce any new hardware features. New Hardware Features in Cisco IOS XE Release 3.7(2)S The IOS XE 3.7(2)S Release for the Cisco ASR 903 Router does not introduce any new hardware features. New Hardware Features in Cisco IOS XE Release 3.7(1)aS The IOS XE 3.7(1)aS Release for the Cisco ASR 903 Router introduces the following hardware features: • AC Power Supply—Release 3.7(1)aS3.7(1)aS introduces support for the AC power supply. For more information about the AC power supply, see the Cisco ASR 903 Hardware Guide. New Hardware Features in Cisco IOS XE Release 3.7(0)S Release 3.7 introduces support for the ONS-SC-155-EL SFP module. New Software Features in Cisco IOS XE Release 3.7(5)S The IOS XE 3.7(5)S Release for the Cisco ASR 903 Router does not introduce any new software features. New Software Features in Cisco IOS XE Release 3.7(4)S The IOS XE 3.7(4)S Release for the Cisco ASR 903 Router does not introduce any new software features. New Software Features in Cisco IOS XE Release 3.7(3)S The IOS XE 3.7(3)S Release for the Cisco ASR 903 Router does not introduce any new software features. New Software Features in Cisco IOS XE Release 3.7(2)S The IOS XE 3.7(2)S Release for the Cisco ASR 903 Router does not introduce any new software features.

OL-26630-12 Chapter New Software Features in Cisco IOS XE Release 3.7(1)aS New Software Features in Cisco IOS XE Release 3.7(1)aS Release 3.7(1) introduces support for QoS policies on egress MLPPP interfaces on the T1/E1 interface module. For more information about how to configure QoS policies on MLPPP interfaces, see the Cisco ASR 903 Router Chassis Configuration Guide, Release 3.7. New Software Features in Cisco IOS XE Release 3.7(0)S The following are the new software features introduced in Cisco IOS XE Release 3.7(0)S: • BGP Graceful Shutdown—The BGP Graceful Shutdown feature reduces or eliminates the loss of traffic along a link being shut down for maintenance. Routers always have a valid route available during the convergence process. This feature is used primarily for maintenance on a link between a PE and CE. For more information, see http://www.cisco.com/en/US/docs/ios-xml/ios/iproute_bgp/configuration/xe-3s/irg-grace-shut.htm l. • Channelization Support—This release introduces support for channelization on the OC-3 interface module using the channel-group command. For more information, see http://www.cisco.com/en/US/docs/routers/asr903/software/guide/chassis/Release3.7.0S/ASR903- Chassis-SW-37.html. • DHCP Option 82—In residential, metropolitan Ethernet-access environments, DHCP can centrally manage the IP address assignments for a large number of subscribers. When the DHCP option-82 feature is enabled on a switch, a subscriber device is identified by the switch port through which it connects to the network in addition to its MAC address. Multiple hosts on the subscriber LAN can be connected to the same port on the access switch and are uniquely identified.For more information, see http://www.cisco.com/en/US/docs/wireless/asr_900/feature/guides/dhcp82.html. • DHCP Snooping—DHCP snooping is a DHCP security feature that provides network security by filtering untrusted DHCP messages and by building and maintaining a DHCP snooping binding database, also referred to as a DHCP snooping binding table. DHCP snooping acts like a firewall between untrusted hosts and DHCP servers. You use DHCP snooping to differentiate between untrusted interfaces connected to the end user and trusted interfaces connected to the DHCP server or another switch. For more information, see http://www.cisco.com/en/US/docs/wireless/asr_900/feature/guides/dhcp82.html. • Dynamic ARP Inspection—Dynamic ARP inspection determines the validity of an ARP packet based on valid IP-to-MAC address bindings stored in a trusted database, the DHCP snooping binding database. This database is built by DHCP snooping if DHCP snooping is enabled on the bridge-domains and on the router. If the ARP packet is received on a trusted interface, the router forwards the packet without any checks. On untrusted interfaces, the switch forwards the packet only if it is valid. For more information, see http://www.cisco.com/en/US/docs/wireless/asr_900/feature/guides/dynarp.html. • E2E Transparent Clocking—A transparent clock is a network device such as a switch that calculates the time it requires to forward traffic and updates the PTP time correction field to account for the delay, making the device transparent in terms of timing calculations. The transparent clock ports have no state because the transparent clock does not need to synchronize to the grandmaster clock. An end-to-end transparent clock measures the residence time of a PTP message and accumulates the times in the correction field of the PTP message or an follow-up message. For more information, see http://www.cisco.com/en/US/docs/routers/asr903/software/guide/chassis/Release3.7.0S/ASR903- Chassis-SW-37.html.

OL-26630-12 Chapter New Software Features in Cisco IOS XE Release 3.7(0)S • GOLD—Generic Online Diagnostic (GOLD) is a health monitoring feature implemented on the Cisco ASR 903 Router. The GOLD functionality is developed to provide online diagnostic capabilities that run at bootup, in the background on a periodic basis, or based on demand from the CLI. For more information, see http://www.cisco.com/en/US/docs/wireless/asr_900/feature/guides/GOLD.html. • Hot Standby Pseudowire Support—The Hot Standby Pseudowire feature provides faster failover of a backup pseudowire and reduced traffic loss during failover by setting the backup pseudowire to a hot standby state, such that it can immediately take over if the primary pseudowire fails. This feature is supported for Ethernet only; TDM and ATM interfaces are not supported. For more information, see: – http://www.cisco.com/en/US/docs/routers/7600/install_config/ES40_config_guide/es40_chap6. html. – http://www.cisco.com/en/US/docs/ios/12_0s/feature/guide/fspseudo.html – http://www.cisco.com/en/US/partner/docs/ios/mpls/configuration/guide/mp_hspw_for_atm.html #wp1054150 • Hybrid Clocking Support—Hybrid clocking mode that uses clock frequency obtained from the synchronous Ethernet port while using phase (ToD or 1PPS) obtained using PTP. The combination of multiple time and phase sources for the same master clock improves performance over using PTP alone. The router can act as a hybrid clock in both master ordinary clock and slave ordinary clock. For more information, see http://www.cisco.com/en/US/docs/routers/asr903/software/guide/chassis/Release3.7.0S/ASR903- Chassis-SW-37.html. • IPv6 ACL—IPv6 Access Control Lists (ACLs) determine what traffic is blocked and what traffic is forwarded at device interfaces. ACLs allow filtering based on source and destination addresses, inbound and outbound to a specific interface. For more information, see http://www.cisco.com/en/US/docs/wireless/asr_900/feature/guides/IPv6_ACL.html. • Layer 2 QoS for ATM—This feature introduces support for support cbr and vbr on ATM interfaces. For more information, see http://www.cisco.com/en/US/partner/docs/ios-xml/ios/mp_l2_vpns/configuration/xe-3s/qos-atm-v p-support-xe.html • Link Path Through—This feature enables a local EoMPLS PE router to detect a failure in the path between the remote PE and CE routers. The local PE router propagates the failure to the local CE router such that it brings down the pseudowire connection and can more quickly reestablish the connection when the remote CE-PE connection is restored. This feature is enabled automatically and does not introduce any new CLI commands. • MAC Address Security for EVC Bridge-Domain—MAC address security for EVCs. Provides the capability to control and filter the MAC address learning behavior at the granularity of a single EVC service instance. For more information, see: – http://www.cisco.com/en/US/docs/ios-xml/ios/cether/configuration/xe-3s/asr903/ce-mac-addlmt -bdsin.html – http://www.cisco.com/en/US/docs/ios-xml/ios/cether/configuration/xe-3s/ce-mac-addlmt-bdsin. html • MAC Limiting—Mac address limiting per bridge-domain restricts the number of MAC addresses that the router learns in bridge-domain on an EFP, pseudowire or switch port. For more information, see http://www.cisco.com/en/US/docs/wireless/asr_900/feature/guides/mac_limiting.html.

OL-26630-12 Chapter New Software Features in Cisco IOS XE Release 3.7(0)S • MPLS VPN—The MPLS VPN Inter-AS with ASBRs Exchanging VPN-IPv4 Addresses feature allows a Multiprotocol Label Switching (MPLS) Virtual Private Network (VPN) to span service providers and autonomous systems. For more information, see http://www.cisco.com/en/US/docs/ios/mpls/configuration/guide/mp_vpn_connect_asbr.html. • Multicast Static MAC Addresses— Static MAC addresses allow you to enable multicast at the layer 2 level. You can use multicast static MAC addresses to forward multicast packets to specific EFPs on a network. For more information, see http://www.cisco.com/en/US/docs/wireless/asr_900/feature/guides/evc.html. • Multi-Level Priority Queues (MPQ)—This feature allows you to configure multiple priority queues for multiple traffic classes by specifying a different priority level for each of the traffic classes in a single service policy map. You can configure multiple service policy maps per router. Having multiple priority queues enables the router to place delay-sensitive traffic (for example, voice) on the outbound link before delay-insensitive traffic. As a result, high-priority traffic receives the lowest latency possible on the router. For more information, see: – http://www.cisco.com/en/US/docs/ios-xml/ios/qos_conmgt/configuration/xe-3s/asr903/qos-con mgt-multilevel-pq.html – http://www.cisco.com/en/US/docs/ios-xml/ios/qos_conmgt/configuration/xe-3s/qos-conmgt-mul tilevel-pq.html • N:1 PVC mapping to PWE with non-unique VPI—This feature allows you to map one or more ATM permanent virtual circuits (PVCs) to a single pseudowire. For more information, see http://www.cisco.com/en/US/docs/ios-xml/ios/atm/configuration/15-2s/atm-n1pvc-mapping.html. • Onboard Failure Logging—The Onboard Failure Logging (OBFL) feature collects data such as operating temperatures, hardware uptime, interrupts, and other important events and messages from system hardware installed in a Cisco router or switch. The data is stored in nonvolatile memory and helps technical personnel diagnose hardware problems. For more information, see http://www.cisco.com/en/US/docs/wireless/asr_900/feature/guides/onboard_failure_logging.html. • PTP Redundancy—PTP redundancy allows a PTP slave clock to select the best master from multiple available master clocks based on clock quality and availability. For more information, see http://www.cisco.com/en/US/docs/routers/asr903/software/guide/chassis/Release3.7.0S/ASR903- Chassis-SW-37.html. • Time of Day Selection—You can use the time of day (ToD) and 1PPS ports on the Cisco ASR 903 Series Router to exchange ToD clocking. In master mode, the router can receive time of day (ToD) clocking from an external GPS unit; the router requires a ToD, 1PPS, and 10Mhz connection to the GPS unit. For more information, see http://www.cisco.com/en/US/docs/routers/asr903/software/guide/chassis/Release3.7.0S/ASR903- Chassis-SW-37.html

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OL-26630-12 4 New Features in Cisco IOS XE 3.8S Releases This chapter provides information about the new features introduced in the Cisco IOS XE Release 3.8S. This chapter includes the following sections: • New HardwareFeatures in Cisco IOS XE Release 3.8(2)S, page 1 • New Hardware Features in Cisco IOS XE Release 3.8(1)S, page 1 • New Hardware Features in Cisco IOS XE Release 3.8(0)S, page 1 • New SoftwareFeatures in Cisco IOS XE Release 3.8(2)S, page 2 • New Software Features in Cisco IOS XE Release 3.8(1)S, page 2 • New Software Features in Cisco IOS XE Release 3.8(0)S, page 2 New HardwareFeatures in Cisco IOS XE Release 3.8(2)S The IOS XE 3.8(2)S Release for the Cisco ASR 903 Router does not introduce any new hardware features. New Hardware Features in Cisco IOS XE Release 3.8(1)S The IOS XE 3.8(1)S Release for the Cisco ASR 903 Router does not introduce any new hardware features. New Hardware Features in Cisco IOS XE Release 3.8(0)S The IOS XE 3.8(0)S Release for the Cisco ASR 903 Router introduces the following hardware features: Release 3.8(0)S introduces support for the following SFPs: – GLC-FE-100BX-U – GLC-FE-100BX-D – GLC-FE-100LX

OL-26630-12 Chapter New SoftwareFeatures in Cisco IOS XE Release 3.8(2)S – GLC-FE-100FX – ONS-XC-10G-EP30.33 – XFP10GER-192IR-L – XFP10GLR-192SR-L – XFP-10GZR-OC192LR For more information about how to configure these SFPs, see: http://www.cisco.com/en/US/partner/docs/interfaces_modules/transceiver_modules/installation/note/O L_24246.html http://www.cisco.com/en/US/partner/products/hw/modules/ps5455/tsd_products_support_series_home .html New SoftwareFeatures in Cisco IOS XE Release 3.8(2)S The IOS XE 3.8(2)S Release for the Cisco ASR 903 Router does not introduce any new software features. New Software Features in Cisco IOS XE Release 3.8(1)S Release 3.8(1) introduces support for the following software features: • uRPF Loose Mode—This release introduces support for Unicast Reverse Path Forwarding (uRPF) Loose mode. For more information about this feature, see http://www.cisco.com/en/US/docs/ios-xml/ios/sec_data_urpf/configuration/xe-3s/sec-unicast-rpf-l oose-mode.html New Software Features in Cisco IOS XE Release 3.8(0)S Release 3.8(0) introduces support for the following software features: • Automatic Protection Switching—This release introduces support for Automatic protection switching (APS) for link failure protection on SONET networks. For more information, see http://www.cisco.com/en/US/docs/routers/asr903/feature/guide/APS.html • ATM IMA on OC-3 Interfaces—This release introduces support for ATM IMA on the OC-3 interface module. For more information about this feature, see the Cisco ASR 903 Router Chassis Configuration Guide, Release 3.8. • BFD Support on TDM interfaces—Release 3.8 introduces support for BFD on TDM interfaces. This feature does not introduce any new CLI. • BFD Support for HSRP—This release extends Bidirectional Forwarding Detection support in order to send failure notifications using the Hot Standby Router Protocol (HSRP). For more information about this feature, see http://www.cisco.com/en/US/products/ps11610/products_installation_and_configuration_guides_l ist.html • BFD Timer Improvements—Release 3.8 introduces support for 3.3ms timers for offloaded IPv4 BFD traffic.

OL-26630-12 Chapter New Software Features in Cisco IOS XE Release 3.8(0)S • BGP PIC—This release introduces support for BGP Prefix-Independent Convergence (PIC). This feature improves BGP convergence after a network failure. This convergence is applicable to both core and edge failures and can be used in both IP and MPLS networks. The BGP PIC Edge for IP and MPLS-VPN feature creates and stores a backup/alternate path in the routing information base (RIB), forwarding information base (FIB), and Cisco Express Forwarding so that when a failure is detected, the backup/alternate path can immediately take over, thus enabling fast failover. For more information, see http://www.cisco.com/en/US/partner/docs/ios-xml/ios/iproute_bgp/configuration/xe-3s/asr903/irg- xe-3s-asr903-book.html • VPLS BGP Signaling—This release introduces support for VPLS BGP Signaling. The two primary functions of the Virtual Private LAN Service (VPLS) control plane are autodiscovery and signaling. The VPLS BGP Signaling feature enables you to use BGP as both an autodiscovery and a signaling protocol for VPLS. For more information, see http://www.cisco.com/en/US/docs/ios-xml/ios/iproute_bgp/configuration/xe-3s/asr903/irg-vpls-bg p-sig.html • E-LMI PE Support—This release introduces support for Ethernet Local Management Interface (LMI) at the Provider Edge (PE). For more information about this feature, see http://www.cisco.com/en/US/docs/ios-xml/ios/cether/configuration/xe-3s/asr903/ce-elmi-pe.html • IP SLA Y.1731 SLM Feature Enhancements—This release introduces support for IP SLA SLM enhancements as described in the Y.1731 standard. For more information about this feature, see http://www.cisco.com/en/US/docs/ios-xml/ios/ipsla/configuration/xe-3s/asr903/sla_y1731_deman d.html • IS-IS Support for BFD over IPv6—This release introduces support for BFD on IS-IS IPv6 connections. For more information about this feature, see http://www.cisco.com/en/US/products/ps11610/products_installation_and_configuration_guides_l ist.html • LACP Min-Links—This release introduces support for Etherchannel Min-Links, a minimum threshold for the number of links in an Etherchannel before the it becomes active. For more information about this feature, see http://www.cisco.com/en/US/docs/ios-xml/ios/cether/configuration/xe-3s/asr903/ce-ieee-link-bndl -xe.html • Microwave Adaptive Bandwidth—This release introduces support for Microwave Adaptive Bandwidth with G.8032 and CFM. For more information about this feature, see http://www.cisco.com/en/US/docs/ios-xml/ios/cether/configuration/xe-3s/asr903/ce-cfm-adapt-ban dwidth.html • MPLS on PoS Interfaces—Release 3.8 introduces support for MPLS on Packet over SONET (PoS) interfaces. For more information about this feature, see the Cisco ASR 903 Router Chassis Configuration Guide, Release 3.8. • MPLS-TP MIB—This release introduces support for the MPLS-TP MIB. For more information about using MIBs, see MIB Support, page 4. • MPLS-TP Pseudowire Support—This release introduces support for MPLS-TP on ATM and TDM pseudowires. For more information, see the Cisco ASR 903 Router Chassis Configuration Guide, Release 3.8 and http://www.cisco.com/en/US/docs/ios-xml/ios/mp_basic/configuration/xe-3s/mp-mpls-tp.html • OC-3 MLPPP QoS Support—Release 3.8 introduces support for QoS policies on egress MLPPP interfaces on the optical interface module.

OL-26630-12 Chapter New Software Features in Cisco IOS XE Release 3.8(0)S • Multicast on T1/E1 and Optical Interfaces—Release 3.8 introduces support for multicast on T1/E1 and OC-3 interface modules. For more information about multicast, see http://www.cisco.com/en/US/products/ps11610/products_installation_and_configuration_guides_l ist.html. • Network Virtualization Service—This Release introduces support for the Satellite Network Virtualization (nV) service or the Satellite Switching System, which enables you to configure a topology in which satellite devices complement one or more Cisco ASR 9000 Series routers in order to collectively realize a single virtual switching system. In this system, the satellite switches act under the management control of the Cisco ASR 9000 Series Aggregation Services Routers. The complete configuration and management of the satellite chassis and features is performed through the control plane and management plane of the Cisco ASR 9000 Series Router. For more information about how to configure nV on the ASR 9000 and the satellite devices, see http://www.cisco.com/en/US/partner/docs/routers/asr9000/software/asr9k_r4.2/interfaces/configur ation/guide/hc42satl.html • Packet over SONET—This release introduces support for Packet over SONET (PoS) interfaces on the OC-3 interface module. For more information on how to configure PoS interfaces, see the Cisco ASR 903 Chassis Configuration Guide, Release 3.8. • QoS on PoS Interfaces—Release 3.8 introduces support for QoS features on egress PoS interfaces using MLPPP bundles. For more information about configuring QoS on MLPPP interfaces, see the Cisco ASR 903 Chassis Configuration Guide, Release 3.8. • QoS Features—Release 3.8 introduces support for the following QoS features: – queue-limit percent command— Allows you to specify the queue limit (size) for a class in as a percentage value. – Higher Queue Limit Size— Release 3.8 extends the maximum byte value queue-limit-size argument used with the queue-limit command. The previous maximum value was 491520 bytes; the new value is 2 MB. – Release 3.8 enhances the show policy-map interface command to display the default queue-limit. For more information about the Release 3.8 QoS features, see the QoS chapter of the Cisco ASR 903 Chassis Configuration Guide, Release 3.8. • SONET Mode—This release introduces support for SONET mode on the OC-3 interface module. For more information on how to configure PoS interfaces, see the Cisco ASR 903 Chassis Configuration Guide, Release 3.8. • Synthetic Frame Loss Measurement—This release introduces support for Synthetic Frame Loss Measurement for Ethernet OAM. For more information about this feature, see http://www.cisco.com/en/US/docs/ios-xml/ios/ipsla/configuration/xe-3s/asr903/sla_mether3_y173 1.html • TCP path MTU Support—This release introduces support for BGP TCP Path MTU Discovery. For more information about this feature, see http://www.cisco.com/en/US/docs/ios/iproute_bgp/configuration/guide/irg_neighbor.html • Telecom Profile Support—Release 3.8 introduces support for telecom profiles, which allow you to configure a network clock to use the G.8265.1 recommendations for establishing PTP sessions, determining the best master clock, handling SSM, and mapping PTP classes. For information about how to configure telecom profiles, see the Cisco ASR 903 Chassis Configuration Guide, Release 3.8. • Trunk EFPs on Port-Channel Interfaces—This release adds support for trunk EFPs on port-channel interfaces, as shown in the following configuration: !

OL-26630-12 Chapter New Software Features in Cisco IOS XE Release 3.8(0)S interface port-channel 4 service instance 1 ethernet encapsulation untagged l2protocol peer lacp bridge-domain 1 ! service instance trunk 10 ethernet encapsulation dot1q <> rewrite ingress tag pop 1 symmetric bridge-domain from-encapsulation ! For more information about configuring EFP interfaces, see the Configuring Ethernet Virtual Connections on the Cisco ASR 903 Router. • Y.1731 enhancements—This release introduces support for Y.1731 on-demand and concurrent features. For more information about this feature, see http://www.cisco.com/en/US/partner/docs/ios-xml/ios/cether/configuration/xe-3s/asr903/ce-y1731 -perfmon.html

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OL-26630-12 5 New Features in Cisco IOS XE 3.9S Releases This chapter provides information about the new features introduced in the Cisco IOS XE Release 3.9S and includes the following sections: • New Hardware Features in Cisco IOS XE Release 3.9(2)S, page 1 • New Software Features in Cisco IOS XE Release 3.9(2)S, page 1 • New Hardware Features in Cisco IOS XE Release 3.9(1a)S, page 1 • New Software Features in Cisco IOS XE Release 3.9(1a)S, page 2 • New Hardware Features in Cisco IOS XE Release 3.9(0)S, page 2 • New Software Features in Cisco IOS XE Release 3.9(0)S, page 3 New Hardware Features in Cisco IOS XE Release 3.9(2)S There are no new hardware features introduced in Cisco IOS XE Release 3.9(2)S. New Software Features in Cisco IOS XE Release 3.9(2)S There are no new software features introduced in Cisco IOS XE Release 3.9(2)S. New Hardware Features in Cisco IOS XE Release 3.9(1a)S Release 3.9(1) introduces support for the following hardware features: • GLC-FE-100EX • GLC-FE-100ZX • SFP-GE-L • SFP-GE-S • SFP-GE-Z

OL-26630-12 Chapter New Features in Cisco IOS XE 3.9S Releases New Software Features in Cisco IOS XE Release 3.9(1a)S New Software Features in Cisco IOS XE Release 3.9(1a)S There are no new software features introduced in Cisco IOS XE Release 3.9(1)S. New Hardware Features in Cisco IOS XE Release 3.9(0)S Release 3.9(0) introduces support for the following hardware features: • DWDM-XFP-30.33 • DWDM-XFP-31.12 • DWDM-XFP-31.90 • DWDM-XFP-32.68 • DWDM-XFP-34.25 • DWDM-XFP-35.04 • DWDM-XFP-35.82 • DWDM-XFP-36.61 • DWDM-XFP-38.19 • DWDM-XFP-38.98v • DWDM-XFP-39.77 • DWDM-XFP-40.56 • DWDM-XFP-42.14 • DWDM-XFP-42.94 • DWDM-XFP-43.73 • DWDM-XFP-44.53 • DWDM-XFP-46.12 • DWDM-XFP-46.92 • DWDM-XFP-47.72 • DWDM-XFP-48.51 • DWDM-XFP-50.12 • DWDM-XFP-50.92 • DWDM-XFP-51.72v • DWDM-XFP-52.52 • DWDM-XFP-54.13 • DWDM-XFP-54.94 • DWDM-XFP-55.75 • DWDM-XFP-56.55 • DWDM-XFP-58.17 • DWDM-XFP-58.98 • DWDM-XFP-59.79

OL-26630-12 Chapter New Features in Cisco IOS XE 3.9S Releases New Software Features in Cisco IOS XE Release 3.9(0)S • DWDM-XFP-60.61 • DWDM-XFP-C • DWDM-XFP-1560.61 New Software Features in Cisco IOS XE Release 3.9(0)S Release 3.9(0) introduces support for the following software features: • BFD Echo Mode Hardware Offloading—BFD echo mode detects forwarding path failures on the remote system using echo packets; this release introduces support for hardware offloading of BFD echo mode packets for up to 255 sessions. The minimum supported timer value for offloaded BFD echo mode sessions is 3.3 ms. BFD echo offloading directs BFD echo packets to the high priority queue instead of the default queue. For more information about how to configure BFD, see IP Routing: BFD Configuration Guide, Cisco IOS XE Release 3S (Cisco ASR 903). • BGP Support for 4-byte ASN —This release introduces support for 4-byte autonomous system numbers in both the asplain format and the asdot format as described in RFC 5396. For more information, see http://www.cisco.com/en/US/docs/ios-xml/ios/iproute_bgp/configuration/xe-3s/asr903/irg-4byte-a sn.html • CFM Support for Trunk EFP—This release introduces support for CFM on trunk EFP interfaces. For more information about configuring EFPs, see Configuring Ethernet Virtual Connections on the Cisco ASR 903 Router. For more information about configuring CFM, see the Carrier Ethernet Configuration Guide, Cisco IOS XE Release 3S (ASR 903). • Enhanced Object Tracking—The Enhanced Object Tracking feature separates the tracking mechanism from Hot Standby Router Protocol (HSRP) in order to create a separate standalone tracking process. The tracking process is available to other IOS processes and allows tracking of other objects in addition to the interface line-protocol state. For more information, see http://www.cisco.com/en/US/docs/ios/ios_xe/ipapp/configuration/guide/ipapp_eot_xe.html. • Embedded Event Manager (EEM) 4.0—Embedded Event Manager (EEM) is a distributed and customized approach to event detection and recovery offered directly in a Cisco IOS device. EEM offers the ability to monitor events and take informational, corrective, or any desired EEM action when the monitored events occur or when a threshold is reached. For more information, see http://www.cisco.com/en/US/docs/ios-xml/ios/eem/configuration/xe-3s/eem-overview.html. • IP FRR/Remote LFA FRR with L2VPN—The Loop-Free Alternate (LFA) Fast Reroute (FRR) with Layer 2 Virtual Private Network (L2VPN) feature minimizes packet loss due to link or node failure. For more information, see http://www.cisco.com/en/US/docs/ios-xml/ios/mp_l2_vpns/configuration/xe-3s/asr903/mp-l2vpn-l fa-frr.html. • IS-IS topology of 3000 nodes—This release extends IS-IS capacity to include support for 3000 nodes. For more information about configuring IS-IS routing, see IP Routing: Protocol-Independent Configuration Guide, Cisco IOS XE Release 3S (Cisco ASR 903). • ISO OSI Routing—This release introduces support for ISO OSI routing. • Link Layer Discovery Protocol—Link Layer Discovery Protocol (LLDP) is defined in the IEEE 802.1ab standard and allows a non-Cisco device to interact with a Cisco device that uses Cisco Discovery Protocol (CDP) for topology discovery. For more information, see http://www.cisco.com/en/US/docs/ios-xml/ios/cether/configuration/xe-3s/asr903/ce-lldp-multiven d.html.

OL-26630-12 Chapter New Features in Cisco IOS XE 3.9S Releases New Software Features in Cisco IOS XE Release 3.9(0)S • L2VPN Protocol Support—This release introduces support for additional L2VPN protocols including L2TP and UDP. For more information, see http://www.cisco.com/en/US/docs/ios-xml/ios/mp_l2_vpns/configuration/xe-3s/l2vpn-prot-based. html • Microwave Adaptive Bandwidth Modulation Enhancement—This release introduces support for Adaptive Bandwidth Modulation on G.8032 and E-OAM microwave connections, which allow Ethernet switches to optimize traffic forwarding rules based on microwave link capacity. For more information, see – http://www.cisco.com/en/US/docs/routers/asr903/feature/guide/mw_acm.html – http://www.cisco.com/en/US/docs/ios-xml/ios/cether/configuration/xe-3s/asr903/ce-cfm-adapt-b andwidth.html. • MPLS on MLPPP Interfaces—This release introduces support for MPLS on MLPPP interfaces. For more information about configuring MPLS, see the MPLS Basic MPLS Configuration Guide, Cisco IOS XE Release 3S (Cisco ASR 903). For more information about configuring MLPPP interfaces, see http://www.cisco.com/en/US/docs/routers/asr903/software/guide/chassis/Release3.9.0S/ASR903- Chassis-SW-39.html. • MPLS -TP Linear Protection/PSC support—Linear Protection on MPLS-TP based transport networks using the RFC 6378 standard. For more information, see http://www.cisco.com/en/US/docs/ios-xml/ios/mp_basic/configuration/xe-3s/asr903/mp-basic-xe- 3s-asr903-book.html. • MVPN—The Multicast VPN (MVPN) feature provides the ability to support multicast over a Layer 3 Virtual Private Network (VPN). For more information, see http://www.cisco.com/en/US/docs/ios-xml/ios/ipmulti_mvpn/configuration/xe-3s/asr903/imc_cfg_ mc_vpn.html. • On-Demand Y.1731PM Probe Execution—This release introduces support for IPSLA Y1731 SLM enhancements that enable real-time Ethernet service troubleshooting for users without configuration privileges. This feature supports on-demand Synthetic Loss Measurement (SLM) operations that can be run by issuing a single command in privileged EXEC mode. For more information, see http://www.cisco.com/en/US/docs/ios-xml/ios/ipsla/configuration/xe-3s/sla_y1731_demand.html • OC-12 HDLC, PPP, and MLPPP support—This release introduces support for HDLC, PPP, and MLPPP on OC-12 interfaces. For more information, see http://www.cisco.com/en/US/docs/routers/asr903/software/guide/chassis/Release3.9.0S/ASR903- Chassis-SW-39.html. • POS (Packet over SONET/SDH) on OC12 IM card—This release introduces support for Packet over SONET (POS) and SDH on OC-12 interfaces. For more information, see http://www.cisco.com/en/US/docs/routers/asr903/software/guide/chassis/Release3.9.0S/ASR903- Chassis-SW-39.html • PTP over Native Ethernet—This release introduces support for IEEE 1588-2008 Precision Time Protocol (PTP) on native Ethernet interfaces; this allows the router to deliver the PTP payload within an Ethernet packet. For more information, see http://www.cisco.com/en/US/docs/routers/asr903/software/guide/chassis/Release3.9.0S/ASR903- Chassis-SW-39.html. • QoS Ingress Exp Bit Marking—This release introduces support for ingress QoS marking of MPLS Exp bits on TDM and ATM pseudowires. For more information, see http://www.cisco.com/en/US/docs/routers/asr903/software/guide/chassis/Release3.9.0S/ASR903- Chassis-SW-39.html.

OL-26630-12 Chapter New Features in Cisco IOS XE 3.9S Releases New Software Features in Cisco IOS XE Release 3.9(0)S • QoS Match on EFP—This release introduces support for QoS matching on EFP interfaces. For more information, see http://www.cisco.com/en/US/docs/routers/asr903/software/guide/chassis/Release3.9.0S/ASR903- Chassis-SW-39.html. • QoS on OC-3 and OC-12 Interfaces—This release introduces support for two-level QoS policies on OC-3/OC-12 serial, MLPPP, and PoS interfaces. For more information, see http://www.cisco.com/en/US/docs/routers/asr903/software/guide/chassis/Release3.9.0S/ASR903- Chassis-SW-39.html. • QoS Support for Ether Channels—This release introduces support for QoS policies on Etherchannel interfaces. For more information, see http://www.cisco.com/en/US/docs/routers/asr903/software/guide/chassis/Release3.9.0S/ASR903- Chassis-SW-39.html.

OL-26630-12 Chapter New Features in Cisco IOS XE 3.9S Releases New Software Features in Cisco IOS XE Release 3.9(0)S

1 Cisco IOS XE 3S Release Notes for the Cisco ASR 903 Router OL-26630-12 6 New Features in Cisco IOS XE 3.10S Releases This chapter provides information about the new features introduced in the Cisco IOS XE Release 3.10S. This chapter includes the following sections: • New Hardware Features in Cisco IOS XE Release 3.10.2S, page 6-1 • New Hardware Features in Cisco IOS XE Release 3.10.1S, page 6-1 • New Hardware Features in Cisco IOS XE Release 3.10S, page 2 • New Software Features in Cisco IOS XE Release 3.10.2S, page 6-3 • New Software Features in Cisco IOS XE Release 3.10.1S, page 6-4 • New Software Features in Cisco IOS XE Release 3.10S, page 4 New Hardware Features in Cisco IOS XE Release 3.10.2S There are no new hardware features introduced for Cisco IOS XE Release 3.10.2.S. New Hardware Features in Cisco IOS XE Release 3.10.1S The IOS XE 3.10S Release for the Cisco ASR 903 Router introduces the following hardware features: DC PEM Module (A900-PWR550-D-E) The power supply provides 550 W output power for system 12 V power. The power supply is field replaceable, hot-swappable, and operates separately from the fan tray. The power supply contains a front panel with mounting screws, a handle for insertion and removal, and two status LEDs. No ON/OFF switch is provided The A900-PWR550-D-E DC PEM module has a T-shaped power input terminal connector. For information on DC PEM module specifications, see Cisco ASR 903 router Overview. For information on installing the connector, see Installing the Cisco ASR 903 Series Aggregation Services Router.

OL-26630-12 Chapter New Hardware Features in Cisco IOS XE Release 3.10S Fan Tray (A903-FAN-E) The A903-FAN-E is a fan tray containing twelve (40 x 40 x 20 mm) fans and provides sufficient capacity to maintain operation indefinitely in the event of an individual fan failure. For information on installing the fan tray, see Installing the Cisco ASR 903 Series Aggregation Services Router. Dust Filter (A903-FAN-F) The dust filter on the fan tray is a quadrafoam 45PPI filter which is 85 percent dust resistant. For information on installing the dust filter, see Installing the Cisco ASR 903 Series Aggregation Services Router. Dummy Cover (A903-FAN-F-B) A dummy cover (A903-FAN-F-B) secures the dust filter in the chassis. For installing the fan filter, see For information on installing the dummy cover on the fan tray, see Installing the Cisco ASR 903 Series Aggregation Services Router. Cable Bracket (A903-CAB-BRACKET) The cable management bracket helps in routing the cables from the interface modules; therefore enabling a proper cable bending radius. For installing the bracket, see Installing the Cisco ASR 903 Series Aggregation Services Router. Air Plenum Air Plenum or air baffle assembly is used change the air flow pattern of the unit. When the router is installed with the plenum, the air flow pattern is changed from side-side to front-back. For information on ordering the air plenum, see Installing the Cisco ASR 903 Series Aggregation Services Router. New Hardware Features in Cisco IOS XE Release 3.10S The IOS XE 3.10S Release for the Cisco ASR 903 Router introduces the following hardware features: Serial Interface Module IOS XE Release 3.10(0)S introduces support for the serial interface module, which is designed to provide a low-latency communication platform for legacy interfaces. Designed for utilities, the module is hardened to accommodate the wide operating temperature swings, EMI and surge spikes, and dust found in substation environments. The combination of the Cisco ASR 903 Router and the serial interface module enables migration from TDM and serial networks to an IP-based network that can control latency and jitter across the network and enable multiple Smart Grid applications. The Cisco ASR 903 Serial Interface Module supports the following standards:

OL-26630-12 Chapter New Software Features in Cisco IOS XE Release 3.10.2S • EEE 1613 2009—IEEE Standard for Environmental and Testing Requirements for Communications Networking Devices in Electric Power Substations • EC 61850-3—IEC standard specifying general requirements for substation automation systems (SAS) communications and related system requirements. • EC 60870-2-1:1995—IEC standard for substation environmental conditions • EC 60870-2-2:1996—IEC standard for substation environmental conditions • EC 61000-6-5:2001—IEC standard defining immunity for power station and substation environments For information on how to install the serial interface module, see the Cisco ASR 903 Hardware Installation Guide. For information on how to configure the serial interface module, see Configuring Raw Socket Transport on the Cisco ASR 903 Router. Note We recommend the installation of the Metro IP Services and Metro Aggregation Services licenses with serial interface module. For more information about obtaining and installing licenses, see Software Licensing Overview. CWDM SFP Cisco IOS XE Release 3.10S introduces support for the following SFPs on the 10 Gigabit Ethernet XFP Interface Module: • ONS-XC-10G-EP • ONS-XC-10G-1470 • ONS-XC-10G-1490 • ONS-XC-10G-1510 • ONS-XC-10G-1530 • ONS-XC-10G-1550 • ONS-XC-10G-1570 • ONS-XC-10G-1590 • ONS-XC-10G-1610 For more information about how to configure these SFPs, see: http://www.cisco.com/en/US/partner/docs/interfaces_modules/transceiver_modules/installation/note/O L_24246.html http://www.cisco.com/en/US/partner/products/hw/modules/ps5455/tsd_products_support_series_home .html New Software Features in Cisco IOS XE Release 3.10.2S There are no new software features introduced for Cisco IOS XE Release 3.10.2.S.

OL-26630-12 Chapter New Software Features in Cisco IOS XE Release 3.10.1S New Software Features in Cisco IOS XE Release 3.10.1S There are no new software features introduced for Cisco IOS XE Release 3.10.1.S. New Software Features in Cisco IOS XE Release 3.10S The following features are introduced in Cisco IOS Release 3.10S. • Access Circuit Redundancy, page 6-4 • Access Switch Device Manager Template, page 6-4 • Auto-IP, page 6-5 • BFD Debug Enhancement, page 6-5 • Bidirectional Forwarding Detection Deterministic Hardware Offload, page 6-5 • Broadcast and Multicast Suppression, page 6-5 • IGMP Snooping, page 6-5 • Licensing the OC-3 and OC-12 Interface Modules, page 6-6 • Multichassis LACP, page 6-6 • Pseudowire Group Switchover, page 6-6 • Remote LFA FRR Protection for TDM and ATM Pseudowires, page 6-7 • Remote LFA FRR and Labeled BGP PIC FRR Integration, page 6-8 • VPLS over Remote LFA, page 6-9 Access Circuit Redundancy Access Circuit Redundancy (ACR) enables local switching for circuit emulation (CEM) interfaces by creating a virtual CEM-ACR interface. All configuration changes made on the virtual CEM-ACR interface are applied automatically on both the Working and Protect interfaces. For more information see, Configuring Access Circuit Redundancy on the Cisco ASR 903 Router. Access Switch Device Manager Template The Switch Device Manager (SDM) templates are used to optimize system resources in the router to support specific features, depending on how the router is used in the network. The SDM templates allocate Ternary Content Addressable Memory (TCAM) resources to support different features. Note SDM templates are supported only by the Metro Aggregation Services license. For more information see, Configuring Access Switch Device Manager Template on the Cisco ASR 903 Router.

OL-26630-12 Chapter New Software Features in Cisco IOS XE Release 3.10S Auto-IP The Auto-IP feature addresses the problem of manually reconfiguring nodes during insertion, deletion, and movement of nodes within an auto-IP ring. The auto-IP feature automatically provides IP addresses to the node interfaces inserted into an auto-IP ring. For more information, see Auto-IP. BFD Debug Enhancement The Bidirectional Forwarding Detection (BFD) Debug Enhancement feature enhances the BFD debug messages and the show command output and enables logs and history for critical BFD events. This feature helps network engineers and operators to easily identify any issues with BFD sessions or events. The following commands were introduced for this feature: monitor event-trace bfd, monitor event-trace bfd event, monitor event-trace bfd packet, and show monitor event-trace bfd. For more information, refer to the IP Routing: BFD Configuration Guide, Cisco IOS XE Release 3S (Cisco ASR 903), IP Routing Protocol-Independent Commands A through R, and IP Routing Protocol-Independent Commands S through T. Bidirectional Forwarding Detection Deterministic Hardware Offload The Bidirectional Forwarding Detection (BFD) deterministic hardware offload feature allows you to define the BFD transmission timer value. Any BFD sessions below or equal to the set value are sent to hardware. For more information see, Bidirectional Forwarding Detection Deterministic Hardware Offload. Broadcast and Multicast Suppression A traffic storm occurs when packets flood the LAN, creating excessive traffic and degrading network performance. The traffic broadcast and multicast suppression (or storm control) feature prevents LAN ports from being disrupted by a broadcast, multicast and unicast traffic storm on physical interfaces. Storm control prevents traffic on a LAN from being disrupted by a broadcast, multicast, or unicast storm on a port. Storm control is applicable for physical interfaces and is used to restrict the unicast, broadcast and multicast ingress traffic on the Layer2 interfaces. The feature is disabled by default on the Cisco ASR 903 router. For more information see, Configuring Broadcast and Multicast Suppression on the Cisco ASR Router. IGMP Snooping IP Multicast Internet Group Management Protocol (IGMP), which runs at Layer 3 on a multicast device, generates Layer 3 IGMP queries in subnets where the multicast traffic must be routed. IGMP (on a device) sends out periodic general IGMP queries. IGMP Snooping is an Ethernet Virtual Circuit (EVC)-based feature set. When IGMP snooping is enabled on a bridge domain, the bridge domain interface responds at Layer 2 to the IGMP queries with only one IGMP join request per Layer 2 multicast group. Each bridge domain represents a Layer 2 broadcast domain. For more information see, Configuring IGMP Snooping on Cisco ASR 903 Router.

OL-26630-12 Chapter New Software Features in Cisco IOS XE Release 3.10S Licensing the OC-3 and OC-12 Interface Modules The optical modules 4-Port OC3/STM-1 or 1-Port OC12/STM-4 delivers four active ports of OC-3 interface module (IM) or Synchronous Transport Module level 1 (STM-1) connectivity, or one active port of OC-12 IM or STM-4 connectivity, on the Cisco ASR 903 Router. Licensing is applicable to these ports on the interface modules. The benefits of licensing these ports are: • Facilitate the pay-as-you-grow model to enhance the ports by purchasing licenses as required. • Provide the ability to shift license from one port to another. • Provide the ability to release a license when the interface module is removed from a slot and reinstall the license when inserted again. • Support for high availability and OIR of interface modules. Table 6-1 lists the license supported on the OC-3 and OC-12 interface modules. For more information see, Licensing the OC-3 and OC-12 Interface Modules on the Cisco ASR 903 Router. Multichassis LACP Cisco's Multichassis EtherChannel (MCEC) solution addresses the need for interchassis redundancy mechanisms, where a carrier wants to "dual home" a device to two upstream points of attachment (PoAs) for redundancy. Some carriers either cannot or will not run loop prevention control protocols in their access networks, making an alternative redundancy scheme necessary. MCEC addresses this issue with enhancements to the 802.3ad Link Aggregation Control Protocol (LACP) implementation. These enhancements are provided in the Multichassis LACP (mLACP) feature. For more information, see Multichassis LACP. Pseudowire Group Switchover Currently, pseudowire switchovers to the backup pseudowires occur one by one from IOS to platform dataplane and can take up to four seconds for 1000 pseudowires. The group switchover feature reduces this switchover time by efficiently grouping status messages in both Label Distribution Protocol (LDP) and internal Inter-Process Communications (IPCs). Note The Pseudowire Group Switchover feature is enabled by default and cannot be disabled. For more information, see Cisco ASR 903 Router Chassis Software Configuration Guide, IOS XE Release 3.10S. Table 6-1 OC-3 and OC-12 Port Licenses License Type Description Usability 1 OC3 port license Single OC3/STM-1 port STM-1 on OC-3 port 1 OC12 port license Single OC12/STM-4 port STM-1 on OC-3 port

OL-26630-12 Chapter New Software Features in Cisco IOS XE Release 3.10S Raw Socket Raw Socket Transport is a method for transporting serial data through an IP network. Raw Socket transports Supervisory Control and Data Acquisition (SCADA) data from Remote Terminal Units (RTUs). This method is an alternative to the Block Serial Tunnel (BSTUN) protocol. Raw Socket supports point-to-point and point-to-multipoint connections. For instructions on how to configure Raw Socket, see Configuring Raw Socket Transport on the Cisco ASR 903 Router. Raw Socket is supported on the serial interface module. For instructions on how to install the serial interface module, see the Cisco ASR 903 Hardware Installation Guide. For information on how to configure the serial interface module, see Configuring Raw Socket Transport on the Cisco ASR 903 Router. Note We recommend the installation of the Metro IP Services and Metro Aggregation Services licenses with serial interface module. For more information about obtaining and installing licenses, see Software Licensing Overview. Hardware Limitations Serial Interface Module Limitations—The following limitations apply to the serial interface module: • A maximum of 2 serial interface modules are supported on the Cisco ASR 903 Router. • The serial interface module hardware supports a 230.4 Kbps traffic rate in asynchronous mode. The actual speed is dependent on cable quality and length. The serial interface module hardware supports an 8 Mbps traffic rate in synchronous mode. The actual speed is dependent on cable quality and length. Software Limitations Raw Socket limitations—The following software limitations apply to the serial interface module: • Raw Socket encapsulation is supported on up to 28 serial ports. • Asynchronous EIA/TIA-232 serial traffic is supported with DB-25, DB-9, and RJ-45 connectors. • The X.21, V.35, RS-485, EIA-449, EIA-530, and IRIG-B standards are not currently supported by software. • Synchronous traffic is not currently supported. Remote LFA FRR Protection for TDM and ATM Pseudowires Starting with Cisco IOS XE Release 3.10S, the Loop-Free Alternate (LFA) Fast Reroute (FRR) feature is supported for Time-division multiplexing (TDM) pseudowires. • Circuit Emulation Service over Packet Switched Network (CESoPSN) over MPLS, and Structure-Agnostic Time Division Multiplexing over Packet (SAToP) over MPLS networks for T1, E1, SDH and SONET framing is supported. • Inverse Multiplexing over ATM (IMA) over MPLS; PVC and PVC sessions are supported for the ATM (IMA). For more information see, Configuring Loop-Free Alternate Fast Reroute on the Cisco ASR 903 Router.

OL-26630-12 Chapter New Software Features in Cisco IOS XE Release 3.10S Remote LFA FRR and Labeled BGP PIC FRR Integration Starting with Cisco IOS XE Release 3.10S, Both the Labeled Border Gateway Protocol (BGP) Prefix-Independent Convergence (PIC) feature and the Loop-Free Alternate (LFA) Fast Reroute (FRR) feature can be configured together on the Cisco ASR 903 router. For more information see, Configuring Loop-Free Alternate Fast Reroute on the Cisco ASR 903 Router.

OL-26630-12 Chapter New Software Features in Cisco IOS XE Release 3.10S VPLS over Remote LFA Starting with Cisco IOS XE Release 3.10, Virtual Private LAN Services (VPLS) is supported on the Cisco ASR 903 router. For more information see, Configuring Loop-Free Alternate Fast Reroute on the Cisco ASR 903 Router.

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1 Cisco IOS XE 3S Release Notes for the Cisco ASR 903 Router OL-26630-12 7 New Features in Cisco IOS XE 3.11S Releases This chapter provides information about the new features introduced in the Cisco IOS XE Release 3.11S. This chapter includes the following sections: • New Hardware Features in Cisco IOS XE Release 3.11.1S, page 7-1 • New Software Features in Cisco IOS XE Release 3.11.1S, page 7-1 • New Hardware Features in Cisco IOS XE Release 3.11S, page 7-1 • New Software Features in Cisco IOS XE Release 3.11S, page 7-1 New Hardware Features in Cisco IOS XE Release 3.11.1S There are no new hardware features for Cisco IOS XE Release 3.11.1 S. New Software Features in Cisco IOS XE Release 3.11.1S There are no new hardware features for Cisco IOS XE Release 3.11.1 S. New Hardware Features in Cisco IOS XE Release 3.11S There are no new hardware features for Cisco IOS XE Release 3.11 S. New Software Features in Cisco IOS XE Release 3.11S The following features are introduced in Cisco IOS Release 3.11S. • AAL5 termination, page 7-2 • Access Switch Device Manager Template, page 7-2 • Data Plane Ethernet Loopback with QoS, page 7-2 • Dissimilar PHB Match at Ingress and Egress, page 7-2 • Dying Gasp, page 7-3

OL-26630-12 Chapter New Software Features in Cisco IOS XE Release 3.11S • DS3 Framing on OC-3 and OC-12, page 7-3 • Fast Reroute Support for Bridge Domain Interface, page 7-3 • BGP PIC Support for Bridge Domain Interface with FRR, page 7-3 • IPv6 Multicast: Multicast Listener Discovery (MLD), page 7-3 • IPv6 Multicast: PIM v6, page 7-3 • ISIS and OSPF Local Microloop Protection, page 7-5 • Remote SPAN, page 7-5 • Service Groups, page 7-5 • TCAM Threshold Based Alarms, page 7-5 AAL5 termination This feature enables the Asynchronous Transfer Mode Adaptation Layer 5 (AAL5) layer 3 termination on the interface module (IM) (T1/E1 and OC-3) cards on the Cisco ASR 903 Router. For more information see, http://www.cisco.com/en/US/docs/routers/asr903/software/guide/b_Configuring_AAL5_termination_9 03.html Access Switch Device Manager Template This feature can be used to configure system resources on the router to optimize support for specific features, depending on how the router is used in the network. For more information see, http://www.cisco.com/en/US/docs/routers/asr903/software/guide/b_SDM_ASR903.html Data Plane Ethernet Loopback with QoS The Ethernet data plane loopback feature provides a means for remotely testing the throughput of an Ethernet port. For more information see, http://www.cisco.com/en/US/docs/routers/asr903/software/guide/b_layer2_ASR903_chapter_00.html. Dissimilar PHB Match at Ingress and Egress The dissimilar per-hop behavior (PHB) match on exp is supported for Ingress and Egress on MPLS and VPLS interfaces. In earlier releases prior to Cisco IOS XE Release 3.11S, when qos-group or discard-class based on exp classification was configured, Egress based classification was not allowed on any other classification except Ingress set qos-group or discard-class. This was due to the PHB security model. With Cisco IOS Release 3.11, only EVC based tunnel type configuration with either Layer2 VPN or Layer3 VPN is supported. For more information see, http://www.cisco.com/en/US/docs/routers/asr903/software/guide/b_QoS_guidelines_903_chapter_00.h tml

OL-26630-12 Chapter New Software Features in Cisco IOS XE Release 3.11S Dying Gasp This feature generates an alert when the Cisco ASR 903 Router encounters any of the following conditions: • Interface error-disable • Reload • Power failure or removal of power supply cable For more information see, http://www.cisco.com/en/US/docs/routers/asr903/feature/guide/Dying_Gasp_ASR_903.html. DS3 Framing on OC-3 and OC-12 This feature introduces support for the DS3 clear channel for OC-3 and OC-12 interface modules. For more information, see http://www.cisco.com/en/US/docs/routers/asr903/software/guide/chassis/Release3.9.0S/OC_Ifc_Modu le.html. Fast Reroute Support for Bridge Domain Interface Fast Reroute is supported on bridge domain interfaces on the Cisco ASR 903 router. For more information, see http://www.cisco.com/en/US/docs/routers/asr903/feature/guide/b_lfa_frr_903.html. BGP PIC Support for Bridge Domain Interface with FRR BGP PIC is supported on bridge domain interfaces with FRR on the Cisco ASR 903 router. For more information on configuring BGP PIC, see http://www.cisco.com/en/US/docs/ios-xml/ios/iproute_bgp/configuration/xe-3s/asr903/irg-bgp-mp-pic. html. IPv6 Multicast: Multicast Listener Discovery (MLD) This feature is used by IPv6 devices to discover multicast listeners (nodes that want to receive multicast packets destined for specific multicast addresses) on directly attached links. For more information see, http://www.cisco.com/en/US/docs/routers/asr903/software/guide/b_ipmcast_pim_xe_3S_asr903_chapt er_0101.html IPv6 Multicast: PIM v6 This feature supports the following: • PIM Source-Specific Multicast—The PIM source-specific multicast (SSM) routing protocol supports SSM implementation and is derived from PIM-SM. • PIM Sparse Mode (PIM-SM)—IPv6 multicast provides support for intra domain multicast routing using PIM sparse mode (PIM-SM). • PIM Embedded RP Support—Embedded RP support allows the device to learn RP information using the multicast group destination address instead of the statically configured RP.

OL-26630-12 Chapter New Software Features in Cisco IOS XE Release 3.11S • PIM Accept Register—supports the PIM accept register feature to perform PIM-SM register message filtering at the RP. For more information see, http://www.cisco.com/en/US/docs/routers/asr903/software/guide/b_ipmcast_pim_xe_3S_asr903_chapt er_0110.html

OL-26630-12 Chapter New Software Features in Cisco IOS XE Release 3.11S ISIS and OSPF Local Microloop Protection For ISIS Micoloop Protection, see http://www.cisco.com/en/US/docs/ios-xml/ios/iproute_isis/configuration/xe-3s/irs-uloop-local-avoid.ht ml For OSPF Microloop Protections, see http://www.cisco.com/en/US/partner/docs/ios-xml/ios/iproute_ospf/configuration/xe-3s/iro-ospfv2-ip-f rr.html MR-APS Integration with Hotstandby Pseudowire This feature is a protection mechanism for Synchronous Optical Network (SONET) networks that enablesSONET connections to switch to another SONET circuit when a circuit failure occurs.For more information see, http://www.cisco.com/en/US/docs/routers/asr903/software/guide/b_MR_APS_ASR903.html Remote SPAN This feature is used for remote monitoring of multiple devices at source port, source Vlan levels in the Layer2 network. For more information, see http://www.cisco.com/en/US/docs/routers/asr903/software/guide/b_layer2_ASR903_chapter_01.html Service Groups The Service groups feature allows you to create service groups and apply aggregate features to those service groups. For more information, see http://www.cisco.com/en/US/docs/routers/asr903/software/guide/b_QoS_guidelines_903_chapter_00.h tml TCAM Threshold Based Alarms This feature generates syslog and consequently a Simple Network Management Protocol (SNMP) trap when an application reaches the preset threshold for its allotted TCAM size. For more information, see http://www.cisco.com/en/US/docs/routers/asr903/software/guide/b_TCAM_alarms_ASR903.html.

OL-26630-12 Chapter New Software Features in Cisco IOS XE Release 3.11S

1 Cisco IOS XE 3S Release Notes for the Cisco ASR 903 Router OL-26630-12 8 New Features in Cisco IOS XE 3.12S Releases This chapter provides information about the new features introduced in the Cisco IOS XE Release 3.10S. This chapter includes the following sections: • New Hardware Features in Cisco IOS XE Release 3.12S, page 8-1 • New Software Features in Cisco IOS XE Release 3.12S, page 1 New Hardware Features in Cisco IOS XE Release 3.12S The following features are introduced in Cisco IOS XE Release 3.12S. Cisco ASR 902 Router Chassis The compact 2-rack-unit (RU) routers provides high service scale and flexible hardware configuration.The routers support up to four interface modules. The router supports both AC and DC redundant power supplies. For installation information, see the Cisco ASR 902 Hardware Installation Guide. New Software Features in Cisco IOS XE Release 3.12S The following features are introduced in Cisco IOS Release 3.12S. • IP SLAs TWAMP Responder • Network Time Protocol (NTP) Timestamping • Auto-IP for SVI, Port Channel and VRF • Autonomic Networking • BGP Accumulated IGP • TWAMP Responder with RFC Compliance

OL-26630-12 Chapter New Software Features in Cisco IOS XE Release 3.12S IP SLAs TWAMP Responder The IETF Two-Way Active Measurement Protocol (TWAMP) defines a standard for measuring round-trip network performance between any two devices that support the TWAMP protocols. The TWAMP-Control protocol is used to set up performance measurement sessions. The TWAMP-Test protocol is used to send and receive performance-measurement probes. For more information, see IP SLAs TWAMP Responder. Network Time Protocol (NTP) Timestamping Starting with Cisco IOS XE Release 3.12S, additional NTP Time of Day synchronization configuration is supported when NTP is chosen for time synchronization for one-way delay or delay-variation measurements on source and destination devices. For more information, see Enabling NTP Time of Day Synchronization. Auto-IP for SVI, Port Channel and VRF The Auto-IP feature addresses the problem of manually reconfiguring nodes during insertion, deletion, and movement of nodes within an auto-IP ring. The auto-IP feature automatically provides IP addresses to the node interfaces inserted into an auto-IP ring. For more information, see Auto-IP. Autonomic Networking Autonomic networking makes network devices intelligent by introducing self-management concepts that simplify network management for the network operator. For more information, see Autonomic Networking. BGP Accumulated IGP The BGP Accumulated IGP feature is an optional nontransitive Border Gateway Protocol (BGP) path attribute.The attribute type code for the accumulated interior gateway protocol (AIGP) attribute is assigned by the Internet Assigned Numbers Authority (IANA). The value field of the AIGP attribute is defined as a set of type, length, value (TLV) elements. The AIGP TLV contains the AIGP metric. For more information see, IP Routing: BGP Configuration Guide, Cisco IOS XE Release 3S TWAMP Responder with RFC Compliance See IP SLAs TWAMP Responder.

1 Cisco IOS XE 3S Release Notes for the Cisco ASR 903 Router OL-26630-12 9 Restrictions and Caveats in Cisco IOS XE 3.6S Releases This chapter provides information about restrictions and caveats in Cisco IOS XE 3.6S releases. Note Because Cisco IOS XE 36S is based on Cisco IOS XE 3.5 inherited releases, some caveats that apply to Cisco IOS XE 3.5 releases also apply to Cisco IOS XE 36S. Release 3.5 is not described in this document; for a list of the software caveats that apply to Cisco IOS XE 3.5, see the Release Notes for Cisco IOS XE Release 3S. Note We recommend that you view the field notices for the current release to determine whether your software or hardware platforms are affected. You can access field notices at http://www.cisco.com/en/US/support/tsd_products_field_notice_summary.html. This chapter contains the following sections: • Limitations and Restrictions, page 9-1 • Caveats in Cisco IOS XE 3.6S Releases, page 9-6 Limitations and Restrictions The following sections describe the Cisco ASR 903 Router limitations: • Limitations and Restrictions in Cisco IOS XE Release 3.6(2)S, page 9-1 • Limitations and Restrictions in Cisco IOS XE Release 3.6(1)S, page 9-2 • Limitations and Restrictions in Cisco IOS XE Release 3.6S, page 9-4 Limitations and Restrictions in Cisco IOS XE Release 3.6(2)S Note For a summary of limitations in Release 3.5S, see the IOS XE 3.5 Release Notes.

OL-26630-12 Chapter Restrictions and Caveats in Cisco IOS XE 3.6S Releases Limitations and Restrictions The following limitations apply to the Cisco ASR 903 Router in IOS XE Release 3.6(2)S: • SAToP and CESoPSN pseudowire traffic has a default MPLS Exp priority setting of 5 (high). The limitations for this release are otherwise the same as those for IOS XE Release 3.6(2)S. For more information, see the Limitations and Restrictions in Cisco IOS XE Release 3.6(1)S, page 2. Limitations and Restrictions in Cisco IOS XE Release 3.6(1)S The following limitations apply to the Cisco ASR 903 Router in IOS XE Release 3.6(1)S: Note For a summary of limitations in Release 3.5S, see the IOS XE 3.5 Release Notes. ATM IMA Limitation • You can create a maximum of 16 IMA groups on each T1/E1 interface module. Bridge Domain Interface Limitation • The mtu command is not supported on BDI interfaces; however the ip mtu command is supported. Clocking and Timing Limitation • Only a single clocking input source can be configured within each group of eight ports (0-7 and 8-15) on the T1/E1 interface module using the network-clock input-source command. EFP Limitation • QinQ is not supported on trunk EFP interfaces. Ethernet IM Limitations • The Cisco ASR 903 Router does not support the Facilities Data Link (FDL) on Ethernet interfaces. • The Cisco ASR 903 Router does not support the mac-address command on Gigabit Ethernet interface modules. • 10 Gigabit Ethernet interface modules are not supported in slots 4 and 5. When you install a Gigabit Ethernet IM in the topmost interface module slot (slot 5), the last interface (interface GigabitEthernet0/5/0) is not operational; the port is reserved for internal communication. MLPPP Limitations The following limitations apply when using MLPPP in IOS XE Release 3.6 on the Cisco ASR 903 Router: • All links in an MLPPP bundle must be on the same interface module. • All links in an MLPPP bundle must be of the same bandwidth. • The Cisco ASR 903 Router supports a maximum of 8 links per bundle • To change the MLPPP bundle fragmentation mode between enabled and disabled, perform a shutdown/no shutdown on the bundle. • LFI is not supported • Multiclass MLP is not supported • The Cisco ASR 903 Router supports MLPPP statistics with the following limitations:

OL-26630-12 Chapter Restrictions and Caveats in Cisco IOS XE 3.6S Releases Limitations and Restrictions – Packet counters on the bundle display the number of fragments rather than packets. – Control packets are accounted on the bundle. • If you increase the maximum transmission unit (MTU) size on an MLPPP interface to a value higher than the maximum received reconstructed unit (MRRU) value on the peer interface, this can bring the MLPPP tunnel down. To restore the tunnel, perform a shutdown/no shutdown on the interface. MPLS VPN Limitation • MPLS VPN (L3VPN) Fragmentation does not function properly if an access interface has a higher MTU value than a core interface. To ensure that fragmentation functions correctly, configure the core interface MTU with a value that exceeds the access interface MTU and relevant headers. OC-3 IM Limitations • SDH framing mode is supported; SONET is not supported. • Channelization is not supported. • The optical interface module is designed for OC-3 and OC-12 traffic, but OC-12 functionality is not currently supported. Pseudowire/AToM Limitation • The Cisco ASR 903 Router supports ATM over MPLS N-to-one cell mode for a single ATM Virtual Channel Connections (VCCs) or Permanent Virtual Circuits (PVCs) to a pseudowire, but does not support mapping to multiple VCCs or PVCs. • The Cisco ASR 903 Router does not support ATM over MPLS one-to-one cell mode. • The Cisco ASR 903 Router supports pseudowire ping using the CW method; pseudowire ping using the TTL method is not supported. • The Cisco ASR 903 Router supports a maximum of 2000 pseudowires in any combination. QoS Limitations For a description of QoS features and limitations on the Cisco ASR 903 Router in release 3.6S, see http://www.cisco.com/en/US/docs/wireless/asr_900/software/guide/chassis/Release3.6.0S/ASR903-Ch assis-SW-36.html. Software Upgrade Limitation • We recommend you set the interface-module-delay value to 150 or greater in order to ensure sufficient time for IM software upgrades. Subinterfaces Limitation • The Cisco ASR 903 router does not support subinterface configurations except on ATM interfaces. Note You can configure similar functionality using multiple Ethernet Virtual Connections on an interface. For more information, see Configuring Ethernet Virtual Connections on the Cisco ASR 903 Router. T1/E1 IM Limitations • Inverting data on the T1/E1 interface is not supported—Inverting the data stream using the invert data interface command is not supported.

OL-26630-12 Chapter Restrictions and Caveats in Cisco IOS XE 3.6S Releases Limitations and Restrictions • Bit error rate test (BERT) patterns have limited support—Currently, only the 2^11, 2^15, 2^20-O153, and 2^20-QRSS patterns are supported for BERT. Limitations and Restrictions in Cisco IOS XE Release 3.6S The following limitations apply to the Cisco ASR 903 Router in IOS XE Release 3.6S: Note For a summary of limitations in Release 3.5S, see the IOS XE 3.5 Release Notes. TDM Limitation • The configure replace command is not supported for TDM interfaces. EFP Limitation • QinQ is not supported on trunk EFP interfaces. QoS Limitations For a description of QoS features and limitations on the Cisco ASR 903 Router in release 3.6S, see http://www.cisco.com/en/US/docs/wireless/asr_900/software/guide/chassis/Release3.6.0S/ASR903-Ch assis-SW-36.html. MLPPP Limitations The following limitations apply when using MLPPP in IOS XE Release 3.6 on the Cisco ASR 903 Router: • All links in an MLPPP bundle must be on the same interface module. • All links in an MLPPP bundle must be of the same bandwidth. • The Cisco ASR 903 Router supports a maximum of 8 links per bundle • To change the MLPPP bundle fragmentation mode between enabled and disabled, perform a shutdown/no shutdown on the bundle. • LFI is not supported • Multiclass MLP is not supported • The Cisco ASR 903 Router supports MLPPP statistics with the following limitations: – Packet counters on the bundle display the number of fragments rather than packets. – Control packets are accounted on the bundle. • If you increase the maximum transmission unit (MTU) size on an MLPPP interface to a value higher than the maximum received reconstructed unit (MRRU) value on the peer interface, this can bring the MLPPP tunnel down. To restore the tunnel, perform a shutdown/no shutdown on the interface. ATM IMA Limitation • You can create a maximum of 16 IMA groups on each T1/E1 interface module. Clocking and Timing Limitation • Only a single clocking input source can be configured within each group of eight ports (0-7 and 8-15) on the T1/E1 interface module using the network-clock input-source command.

OL-26630-12 Chapter Restrictions and Caveats in Cisco IOS XE 3.6S Releases Limitations and Restrictions Ethernet IM Restrictions • The Cisco ASR 903 Router does not support the Facilities Data Link (FDL) on Ethernet interfaces. • The Cisco ASR 903 Router does not support the mac-address command on Gigabit Ethernet interface modules. • On the Cisco ASR 903 Router, 10 Gigabit Ethernet interface modules are not supported in slots 4 and 5. • When you install a Gigabit Ethernet IM in the topmost interface module slot (slot 5), the last interface (interface GigabitEthernet0/5/0) is not operational; the port is reserved for internal communication. OC-3 IM Restrictions • The configure replace command is not supported on the OC-3 IMs. • SDH framing mode is supported; SONET is not supported. • HDLC encapsulation is supported; other encapsulation types are not supported. • Channelization is not supported. • The optical interface module is designed for OC-3 and OC-12 traffic, but OC-12 functionality is not currently supported. Pseudowire/AToM Limitation • The Cisco ASR 903 Router supports ATM over MPLS N-to-one cell mode for a single ATM Virtual Channel Connections (VCCs) or Permanent Virtual Circuits (PVCs) to a pseudowire, but does not support mapping to multiple VCCs or PVCs. • The Cisco ASR 903 Router does not support ATM over MPLS one-to-one cell mode. • The Cisco ASR 903 Router supports pseudowire ping using the CW method; pseudowire ping using the TTL method is not supported. • The Cisco ASR 903 Router supports a maximum of 2000 pseudowires in any combination. Subinterfaces Limitation • The Cisco ASR 903 router does not support subinterface configurations except on ATM interfaces. Note You can configure similar functionality using multiple Ethernet Virtual Connections on an interface. For more information, see Configuring Ethernet Virtual Connections on the Cisco ASR 903 Router. T1/E1 IM Limitations • IP addresses are not supported—The current software release does not support specifying an IP address on a T1/E1 interface. You can specify an address on the interface by configuring it as a part of a CEM group using the cem-group command or as a part of an ATM IMA ima-group command. For more details, see the Cisco ASR 903 Series Aggregation Services Router Chassis Software Configuration Guide. • Inverting data on the T1/E1 interface is not supported—Inverting the data stream using the invert data interface command is not supported. • Bit error rate test (BERT) patterns have limited support—Currently, only the 2^11, 2^15, 2^20-O153, and 2^20-QRSS patterns are supported for BERT.

OL-26630-12 Chapter Restrictions and Caveats in Cisco IOS XE 3.6S Releases Caveats in Cisco IOS XE 3.6S Releases Caveats in Cisco IOS XE 3.6S Releases Caveats describe unexpected behavior. Severity 1 caveats are the most serious caveats. Severity 2 caveats are less serious. Severity 3 caveats are moderate caveats and only select severity 3 caveats are included in this chapter. This section describes caveats in Cisco IOS XE 3.6S releases. The following information is provided for each caveat: • Symptom—A description of what is observed when the caveat occurs. • Conditions—The conditions under which the caveat has been known to occur. • Workaround—Solutions, if available, to counteract the caveat. Note If you have an account on Cisco.com, you can also use the Bug Toolkit to find select caveats of any severity. To reach the Bug Toolkit, log in to Cisco.com and go to http://www.cisco.com/pcgi-bin/Support/Bugtool/launch_bugtool.pl. (If the defect that you have requested cannot be displayed, this may be due to one or more of the following reasons: the defect number does not exist, the defect does not have a customer-visible description yet, or the defect has been marked Cisco Confidential.) The Dictionary of Internetworking Terms and Acronyms contains definitions of acronyms that are not defined in this document: http://docwiki.cisco.com/wiki/Category:Internetworking_Terms_and_Acronyms_(ITA) The following sections describe the open and resolved caveats in 3.6S Releases: • Open Caveats—Cisco IOS XE Release 3.6(2)S, page 9-6 • Resolved Caveats—Cisco IOS XE Release 3.6(2)S, page 9-9 • Open Caveats—Cisco IOS XE Release 3.6(1)S, page 9-11 • Resolved Caveats—Cisco IOS XE Release 3.6(1)S, page 9-13 • Open Caveats—Cisco IOS XE Release 3.6(0)S, page 9-17 • Resolved Caveats—Cisco IOS XE Release 3.6(0)S, page 9-28 Open Caveats—Cisco IOS XE Release 3.6(2)S This section documents the unexpected behavior that might be seen with the Cisco ASR 903 Router in Cisco IOS XE Release 3.6(2)S. • CSCts95896 Symptoms: The router stops passing traffic on EVC interfaces. Conditions: Occurs when you issue the default interface command and immediately restore the configuration. The issue occurs with configurations containing either a large number of EFPs or features that impact EFP programming at a lesser scale, such as QoS. Workaround: Wait for the router to clear the old EFP configuration before adding a new configuration. • CSCtw72855 Symptoms: The router does not pass traffic towards the access side on virtual circuits (VCs) configured with QoS shaping output policy.

OL-26630-12 Chapter Restrictions and Caveats in Cisco IOS XE 3.6S Releases Caveats in Cisco IOS XE 3.6S Releases Conditions: Occurs when shaping is configured on class-default Workaround: Configure shaping on user defined class • CSCtw76473 Symptoms: The router displays packet drops on some VPLS pseudowire virtual circuits (VCs) on the disposition side. Conditions: Occurs under the following conditions: -The core network is running MPLS-TP tunnels -There is an SSO switchover on the remote end or an LDP neighbor reset on the peer end. Workaround: There is no workaround. • CSCty45463 Symptoms: The router stops passing VPLS unicast traffic. Conditions: Occurs after you reload the router while it is passing VPLS unicast traffic. Workaround: Perform one of the following actions: – Clear the mac-address table on the affected virtual circuit (VC) – Stop VPLS traffic until the MAC address table is cleared, then resume VPLS traffic. • CSCty51990 Symptoms: The router may crash or restart; the console displays a SW_WDOG: expired message. Conditions: Occurs under the following conditions: – The router is configured with 63 or more instances of a unique EVC configured with a unique bridge domain interface (BDI). – The router is sending IGMP joins to one multicast group. – You perform a shutdown/no shutdown on the interface sending IGMP join messages. – You perform an OIR on the router. Workaround: There is no workaround. • CSCty70119 Symptoms: Port shaper rate changes do not take effect. Conditions: Occurs when QoS policies attached to EVCs on an interface do not include a shaper configuration; the issue does not occur on EFP policies that include a shaper in a class. Workaround: Include a shaper in one class of the EFP policy. • CSCtz20087 Symptoms: The router applies the class-default QoS policy to all outgoing traffic. Conditions: Occurs under the following conditions: -You configure multiple egress QoS policies on a Gigabit Ethernet interface. -You configure a multilink interface with no ingress QoS policy Workaround: There is no workaround. • CSCua10683 Symptoms: The router performs an RSP switchover instead of a thermal shutdown. Conditions: Occurs when the facility-alarm critical exceed-action shutdown command is in the running configuration and some sensors go into a critical condition as indicated by the show environment all or show facility-alarm status commands. Workaround: There is no workaround.

OL-26630-12 Chapter Restrictions and Caveats in Cisco IOS XE 3.6S Releases Caveats in Cisco IOS XE 3.6S Releases • CSCua13924 Symptoms: The convergence time for IS-IS IPv4 Loop Free Alternate Fast Reroute (LFA FRR) is greater than 50 milliseconds. Conditions: Occurs when IS-IS LFA FRR reconverges following an interface shutdown while maintaining a large number of routes. Workaround: There is no workaround. • CSCua14704 Symptoms: The router stops passing traffic on a bridge-domain interface (BDI). Conditions: Occurs when you apply the ip mtu command to a BDI interface for the first time. Workaround: Remove and re-apply the ip mtu command. • CSCua73104 Symptoms: The router does not increment QoS port shaper policy counters displayed by the show policy interface command. Conditions: Occurs when you configure – A class-default policy on a physical interface – A class-based policy on an EVC interface Workaround: There is no workaround; however, the router applies the QoS policy normally. • CSCua95777 Symptoms: The router drops SAToP pseudowire traffic for 10 seconds following a core link failure. Conditions: Occurs when the TDM controller generates an AIS and LOF alarm following a core link failure; the router drops traffic for 10 seconds after generating the alarm. Workaround: There is no workaround. • CSCua97383 Symptoms: A virtual circuit (VC) with an xconnect configuration stops forwarding traffic. Conditions: Occurs with the 3.6(1) software under the following conditions: – You add and remove EFPs on an interface. – You remove and restore an interface configuration. – You are using multiple VTY sessions simultaneously to configure the router. Workaround: Reload the router; you can use either of the following methods to avoid this issue: – Use a single VTY session for configuration. – Apply the configuration mode exclusive command to prevent multiple VTYs from entering configuration mode at once. • CSCub10414 Symptoms: The router displays interface module (IM) traceback errors. Conditions: Occurs with the GLC-SX-MMD or GLC-LH-SMD (Catskills) SFPs under the following scenarios: – IM reload – SSO – Router reload

OL-26630-12 Chapter Restrictions and Caveats in Cisco IOS XE 3.6S Releases Caveats in Cisco IOS XE 3.6S Releases – SFP insertion Workaround: There is no workaround. Resolved Caveats—Cisco IOS XE Release 3.6(2)S This section documents the issues that have been resolved in Cisco IOS XE Release 3.6(2)S. • CSCtx00558 Symptoms: The standby RSP crashes during bootup. Conditions: The issue can occur during bootup of a dual RSP system. Workaround: There is no workaround. • CSCtx02522 Symptoms: The router displays intermittent traceback errors. Conditions: Occurs when you configure REP. Workaround: There is no workaround. • CSCty22165 Symptoms: The router displays the following console message: Transceiver initialization failed: Unable to display idprom. Conditions: The issue can occur when you perform an online insertion and removal (OIR) of an OC-3 interface module. Workaround: Perform a hard OIR (IM replacement) followed by a soft OIR (RSP switchover) on the router. • CSCty42336 Symptoms: BFD sessions flap on the router. Conditions: Occurs when the router is running IP BFD sessions in echo mode with 64 200ms X3 timers. Workaround: There is no workaround. • CSCty57617 Symptoms: The router does not update IMA interface counters. Conditions: Occurs after you perform an SSO on the router. Workaround: There is no workaround. • CSCty74129 Symptoms: A REP topology may reconverge during an RSP switchover. The consoles displays REP no-neighbor messages. Conditions: Occurs when you configure REP between two Cisco ASR 903 Routers and you perform an RSP switchover. Workaround: There is no workaround. • CSCty77466 Symptoms: The port shaper rate changes on RSP switchover. Conditions: Occurs under the following conditions: -You attach a shaper policy to an interface -The interface is configured with multiple EVCs -The EVC has a QoS policy attached.

OL-26630-12 Chapter Restrictions and Caveats in Cisco IOS XE 3.6S Releases Caveats in Cisco IOS XE 3.6S Releases Workaround: Remove and re-attach the policy on the interface. • CSCty77704 Symptoms: CFM traceroute fails between two CE devices. Conditions: Occurs under the following conditions: – There is a CFM xconnect between higher-level MEPs – The MEPs are between CE devices – The CE devices are in a different domain. Workaround: Disable CFM on the Cisco ASR 903 Router acting as a PE device. • CSCtz03779 Symptoms: The standby RSP crashes during ISSU. Conditions: Occurs when you perform an ISSU downgrade from Release 3.6 to 3.5. Workaround: There is no workaround. • CSCtz54650 Symptoms: REP flaps intermittently. Conditions: Occurs with a hybrid REP configuration containing ports with and without Fast LSL enabled. Workaround: Configure all interfaces with Fast LSL. • CSCtz56517 Symptoms: The router drops MPLS packets with a checksum of 0xFFFF. Conditions: Occurs when the ASR 903 is acting as a label disposition edge label switch router (LSR). Workaround: There is no workaround. • CSCtz61153 Symptoms: The ASR 903 does not establish BFD neighbors over port-channel 16. Conditions: Occurs when you configure BFD on port-channel 16 between two ASR 903 routers. Workaround: Configure BFD on port-channels 1 - 15. • CSCtz75641 Symptoms: The router drops traffic over a port-channel. Conditions: Occurs when you perform the following sequence of events: – Configure and bundle a Gigabit Ethernet interface into a port-channel – Remove the interface from the port-channel – Bundle another interface into the port-channel Workaround: Reload the router.

OL-26630-12 Chapter Restrictions and Caveats in Cisco IOS XE 3.6S Releases Caveats in Cisco IOS XE 3.6S Releases Open Caveats—Cisco IOS XE Release 3.6(1)S This section documents the unexpected behavior that might be seen with the Cisco ASR 903 Router in Cisco IOS XE Release 3.6(1)S. • CSCts95896 Symptoms: The router stops passing traffic on EVC interfaces. Conditions: Occurs when you issue the default interface command and immediately restore the configuration. The issue occurs with configurations containing either a large number of EFPs or features that impact EFP programming at a lesser scale, such as QoS. Workaround: Wait for the router to clear the old EFP configuration before adding a new configuration. • CSCtx00558 Symptoms: The standby RSP crashes during bootup. Conditions: The issue can occur during bootup of a dual RSP system. Workaround: There is no workaround. • CSCtx02522 Symptoms: The router displays intermittent traceback errors. Conditions: Occurs when you configure REP. Workaround: There is no workaround. • CSCty42336 Symptoms: BFD sessions flap on the router. Conditions: Occurs when the router is running IP BFD sessions in echo mode with 64 200ms X3 timers. Workaround: There is no workaround. • CSCty70119 Symptoms: Port shaper rate changes do not take effect. Conditions: Occurs when QoS policies attached to EVCs on an interface do not include a shaper configuration; the issue does not occur on EFP policies that include a shaper in a class. Workaround: Include a shaper in one class of the EFP policy. • CSCty74129 Symptoms: A REP topology may reconverge during an RSP switchover. The consoles displays REP no-neighbor messages. Conditions: Occurs when you configure REP between two Cisco ASR 903 Routers and you perform an RSP switchover. Workaround: There is no workaround. • CSCty77466 Symptoms: The port shaper rate changes on RSP switchover. Conditions: Occurs under the following conditions: – You attach a shaper policy to an interface – The interface is configured with multiple EVCs

OL-26630-12 Chapter Restrictions and Caveats in Cisco IOS XE 3.6S Releases Caveats in Cisco IOS XE 3.6S Releases – The EVC has a QoS policy attached. Workaround: Remove and re-attach the policy on the interface. • CSCtz03779 Symptoms: The standby RSP crashes during ISSU. Conditions: Occurs when you perform an ISSU downgrade from Release 3.6 to 3.5. Workaround: There is no workaround. • CSCtz09708 Symptoms: The router cannot establish a PTP session when configured as a PTP slave device. Conditions: Occurs when the router receives PTP packets containing a VPN or VRF label. Workaround: There is no workaround. • CSCtz20087 Symptoms: The router applies the class-default QoS policy to all outgoing traffic. Conditions: Occurs under the following conditions: -You configure multiple egress QoS policies on a Gigabit Ethernet interface. -You configure a multilink interface with no ingress QoS policy Workaround: There is no workaround. • CSCtz54650 Symptoms: REP flaps intermittently. Conditions: Occurs with a hybrid REP configuration containing ports with and without Fast LSL enabled. Workaround: Configure all interfaces with Fast LSL. • CSCtz56517 Symptoms: The router drops MPLS packets with a checksum of 0xFFFF. Conditions: Occurs when the ASR 903 is acting as a label disposition edge label switch router (LSR). Workaround: There is no workaround. • CSCtz61153 Symptoms: The ASR 903 does not establish BFD neighbors over port-channel 16. Conditions: Occurs when you configure BFD on port-channel 16 between two ASR 903 routers. Workaround: Configure BFD on port-channels 1 - 15. • CSCtz75641 Symptoms: The router does not pass traffic over an EVC PC port-channel. Conditions: Occurs when you perform the following sequence of actions: -Remove an EVC member link from a port-channel interface -Configure a trunk EFP -Set the interface to default -Add the EVC member link back into the port-channel interface Workaround: Reload the router. • CSCua03439 Symptoms: The router displays error messages similar to the following: %EVENTLIB-3-CPUHOG: SIP0: nile_mgr: Conditions: Occurs when you boot the router running QoS configurations at a high scale, particularly queues.

OL-26630-12 Chapter Restrictions and Caveats in Cisco IOS XE 3.6S Releases Caveats in Cisco IOS XE 3.6S Releases Workaround: There is no workaround. Resolved Caveats—Cisco IOS XE Release 3.6(1)S This section documents the issues that have been resolved in Cisco IOS XE Release 3.6S(1). • CSCtu35052 Symptoms: Sweep ping fails when an ATM interface is configured with AAL5 encapsulation. Conditions: Occurs when the ATM packet size is greater than 1484 bytes. Workaround: There is no workaround. • CSCtw94068 Symptoms: The router displays traceback messages, after which interfaces stop passing traffic. Conditions: The issue can occur when you reload the router Workaround: There is no workaround. • CSCtx37768 Symptoms: QoS classification does not match traffic against an egress policy map between MPLS and IP access. Conditions: This symptom is observed when a QoS policy is applied on an EVC bridge domain interface. Workaround: Use one of the following workarounds: – Reload the router. – Remove and re-apply an encapsulation configuration such a VLAN. – Remove and re-attach the bridge domain under the EVC. – Perform a shutdown/no shutdown on the BDI interface. • CSCtx73691 Symptoms: The ASR 903 router forwards packets while in HSRP standby mode. Conditions: Occurs when the ASR 903 is running HSRP and the HSRP session flaps. Workaround: There is no workaround. • CSCtx87145 Symptoms: The ASR 903 router does not support LDP label packets when transmitted in PTP delay-request messages. Conditions: Occurs when you configure the ASR 903 router as a PTP (1588 version) boundary clock and the router sends an MPLS label packet within delay-request traffic. Workaround: Align the grandmaster clock source to the same IGP domain and use a prefix-list for local label filtering. • CSCty03480 Symptoms: The interface manager crashes when you remove a BFD template. Conditions: Occurs when you remove a BFD template or modify an MPLS-TP label. Workaround: There is no workaround. • CSCty03617

OL-26630-12 Chapter Restrictions and Caveats in Cisco IOS XE 3.6S Releases Caveats in Cisco IOS XE 3.6S Releases Symptoms: The router displays the following message when executing a Stateful Switchover (SSO): %TRANSCEIVER-3-CHECKSUM_ERROR Conditions: Occurs intermittently when the router is in SSO mode and performing a switchover between RSPs. The console displays this message repeatedly on the new active RSP. Workaround: There is no workaround. • CSCty26726 Symptoms: The IOS kernel crashes. Conditions: Occurs following a reload on a dual RSP system. Workaround: Power cycle the router. • CSCty29449 Symptoms: The router crashes. Conditions: The issue can occur when you shut down and reenable an interface module. Workaround: There is no workaround. • CSCty35365 Symptoms: The router drops traffic passing across ATM MPLS layer 2 virtual circuits (VCs). Conditions: Occurs when you increase the scale above 100 VCs. Workaround: There is no workaround. • CSCty37479 Symptoms: The router experiences line protocol flapping on serial interfaces. Conditions: Occurs with the A900-IMA4OS and A900-IMA16D interface modules when the router is passing high volumes of HDLC or PPP traffic. Workaround: Configure the no keepalive command on serial interfaces. • CSCty47288 Symptoms: The router does not use a standby BITS clock source even when show commands indicate that the router has selected this clock source. Conditions: Occurs when you configure a standby BITS clock source as an input clock source. Workaround: There is no workaround. • CSCty48493 Symptoms: The ASR 903 may reload with when acting as a hybrid clock. Conditions: Occurs under the following conditions: – The PLL mode is TOP CLIENT – The session is in ACQUIRING state – You issue the no ptp clock or domain 0 hybrid command. Workaround: There is no workaround; however the issue occurs rarely. • CSCty49157 Symptoms: Some members in an IMA group do not become active even though the interface controllers are up. Conditions: Occurs when you perform an OIR on a remote line card or when the standby RSP becomes the active RSP.

OL-26630-12 Chapter Restrictions and Caveats in Cisco IOS XE 3.6S Releases Caveats in Cisco IOS XE 3.6S Releases Workaround: There is no workaround. • CSCty51257 Symptoms: The T1/E1 interface module changes to inserted state during an in-service software upgrade (ISSU), causing the interface to fail and the router to generate a core file. Conditions: Occurs when you perform an in-service software upgrade (ISSU) on a router with a T1/E1 interface module. Workaround: Issue the shutdown command on the interface module before beginning ISSU; after ISSU is complete, issue the no shutdown command on the interface module. • CSCty57746 Symptoms: On the Cisco ASR 903 router, the show environment command displays incorrect values, including P0 and P1 voltages and Amps values. Conditions: This symptom is observed with the Cisco ASR 903 router when you apply the show environment command. Workaround: There is no workaround. • CSCty60908 Symptoms: The ASR 903 crashes and creates a core file. Conditions: Occurs when the remote PE device is reloaded and an application such as VPLS or EoMPLS is running over MPLS TE FRR. Workaround: There is no workaround. • CSCty61660 Symptoms: The Cisco ASR 903 Router displays a core dump file. Conditions: Occurs when the remote PE device is reloaded while running VPLS-TP. Workaround: There is no workaround. • CSCty71837 Symptoms: Ping does not work properly when traversing a BDI interface. Conditions: Occurs when you configure MPLS on a BDI interface and ping packets are encapsulated in an MPLS header. Workaround: There is no workaround. • CSCty72251 Symptoms: The router drops traffic following a reload. Conditions: Occurs when you reload the router while running a VRF configuration. Workaround: Remove the configuration, reload the router, and re-apply the configuration. • CSCty72901 Symptoms: Some CEM groups do not function correctly. Conditions: Occurs when you configure more than 336 CEM groups on the T1/E1 or OC-3 interface module. Workaround: There is no workaround; avoid configuring more than 336 CEM groups. • CSCty92979 Symptoms: The router loses ARP table entries after a network link flaps.

OL-26630-12 Chapter Restrictions and Caveats in Cisco IOS XE 3.6S Releases Caveats in Cisco IOS XE 3.6S Releases Conditions: Occurs following a network link flap when the routers ARP table contains entries for next-hop neighbors connected over a router bridge domain interface. Workaround: There is no workaround. • CSCty93985 Symptoms: Egress QoS policies do not take effect on an EFP interface. Conditions: Occurs when you apply an egress QoS policy to an interface configured with more than 37 EFPs. Workaround: There is no workaround. • CSCty97391 Symptoms: The router drops traffic for approximately 9 milliseconds. Conditions: Occurs on the active RSP following an HA switchover. Workaround: There is no workaround. • CSCtz07388 Symptoms: The router does not permit you to add an EFP interface to a split horizon group. Conditions: Occurs after you make the following configuration changes: – Configure 32 EFPs without a split horizon option to a bridge-domain interface. – Configure 2 VPLS pseudowires. Workaround: Configure 30 EFPs without a split horizon option, then apply the VPLS pseudowire configuration. After applying the VPLS pseudowire configuration, you can add 32 EFPs to the split horizon group. • CSCtz17176 Symptoms: Layer 4 port range security ACLs do not function properly. Conditions: Occurs when you apply port range security ACLs to an EVC interface. Workaround: There is no workaround. • CSCtz38119 Symptoms: The router does not complete a MAC address flush on the receiving side of a VPLS pseudowire. Conditions: Occurs when the router receives a layer 2 MAC withdrawal over a VPLS pseudowire. Workaround: There is no workaround. • CSCtz40131 Symptoms: The router does not classify traffic when using QoS ACLs. Conditions: Occurs when you apply a QoS ACL using the range, lt, and gt operators. Workaround: There is no workaround. • CSCtz45069 Symptoms: The router displays CPU hog messages or crashes. Conditions: Occurs under conditions in which the router or an interface module is not responding and the interface module is in an improper state. Workaround: There is no workaround; however the issue occurs very rarely. • CSCtz45898

OL-26630-12 Chapter Restrictions and Caveats in Cisco IOS XE 3.6S Releases Caveats in Cisco IOS XE 3.6S Releases Symptoms: The router drops PTP packets. Conditions: Occurs when PTP packets traverse a BDI with encapsulation configured. Workaround: There is no workaround. • CSCtz55566 Symptoms: The router displays I2C error messages intermittently. Conditions: Occurs when you insert a copper SFP in the SFP interface module. Workaround: There is no workaround. • CSCtz83050 Symptoms: An interface module goes into Inserted state during ISSU. Conditions: Occurs when you perform an ISSU upgrade or downgrade. Workaround: There is no workaround. • CSCtz96120 Symptoms: The router does not recognize interface modules after they are reset during a software upgrade. Conditions: Occurs during ISSU upgrade or downgrade. Workaround: There is no workaround. Open Caveats—Cisco IOS XE Release 3.6(0)S This section documents the unexpected behavior that might be seen with the Cisco ASR 903 Router in Cisco IOS XE Release 3.6(0)S. • CSCtr40582 Symptoms: Ping fails. Conditions: Occurs when you configure AMI line code on a T1 controller. Workaround: There is no workaround. • CSCts75456 Symptoms: Multicast (S,G) entry not established. Conditions: Occurs when you configure OIF and IIF within BDI that are part of a trunk EFP. Workaround: Configure normal EVCs instead of trunk EVCs. • CSCts95896 Symptoms: The router stops passing traffic on EVC interfaces. Conditions: Occurs when you issue the default interface command and immediately restore the configuration. The issue occurs with configurations containing either a large number of EFPs or features that impact EFP programming at a lesser scale, such as QoS. Workaround: Wait for the router to clear the old EFP configuration before adding a new configuration. • CSCtv15403 Symptoms: 64 byte Line rate traffic not achieved. Conditions: Occurs with more than 11 links in a MLP bundle with A900-IMA16D interface module and packet size 64 bytes.

OL-26630-12 Chapter Restrictions and Caveats in Cisco IOS XE 3.6S Releases Caveats in Cisco IOS XE 3.6S Releases Workaround: There is no workaround. • CSCtw59780 Symptoms: BGP dynamic neighbor structures at the hub are not cleaned up after the spokes go down. The output of the show ip bgp all sum command continues to display dynamic neighbors. Conditions: This issue is observed when all the following conditions are met: – The scale environment for dynamic neighbors contains several thousand peers. – The peers are brought up and then removed before they can transition into the Established state. Workaround: There is no workaround. • CSCtw94068 Symptoms: The router displays traceback messages, after which interfaces stop passing traffic. Conditions: The issue can occur when you reload the router Workaround: There is no workaround. • CSCtx02522 Symptoms: The router displays intermittent traceback errors. Conditions: Occurs when you configure REP. Workaround: There is no workaround. • CSCtx37768 Symptoms: QoS classification does not match traffic against an egress policy map between MPLS and IP access. Conditions: Occurs when you apply a QoS policy on an EVC bridge domain interface. Workaround: Use one of the following workarounds: – Reload the router. – Remove and re-apply an encapsulation configuration such a VLAN. – Remove and re-attach the bridge domain under the EVC. – Perform a shutdown/no shutdown on the BDI interface. • CSCtx38156 Symptoms: The router crashes. Conditions: Occurs when you remove the fast-reroute remote-lfa level-2 mpls-ldp command from a configuration. Workaround: This command is not currently supported; avoid including it in a configuration. • CSCtx44508 Symptoms: There is a delay in route processor synchronization after an SSO. Conditions: This issue is observed when iBGP NSR is enabled and under scale conditions. Workaround: There is no workaround. • CSCtx44688 Symptoms: Cannot configure policing and marking together in the same class of the egress policy-map. Conditions: Set and police statements together in the same class of a policy is rejected at the CLI.

OL-26630-12 Chapter Restrictions and Caveats in Cisco IOS XE 3.6S Releases Caveats in Cisco IOS XE 3.6S Releases Workaround: In order to achieve marking and policing at the ingress we can use a conditional policer but this is not supported at the egress. • CSCtx60094 Symptoms: Type 1 MVPN routes are not created. Conditions: This issue is observed when the IP address of a loopback interface is changed. Workaround: Create a dummy neighbor under the address-family ipv4 mvpn configuration or the address-family ipv6 mvpn configuration. Alternatively, unconfigure and reconfigure the MDT group under the VRF configuration. • CSCtx73691 Symptoms: Standby gateway starts forwarding packet for some of the HSRP sessions. Conditions: This is seen on flapping the HSRP session. Workaround: There is no workaround. • CSCtx75877 Symptoms: ICMP unreachable messages are sent even though route for destination ip is present in routing table. There is no ACL applied on any of the interface. Conditions: This is seen on reload with VRRP configuration present on incoming interfaces. Workaround: There is no workaround. • CSCtx77233 Symptoms: The router displays an error message similar to the following: FMFP-3-OBJ_DWNLD_TO_CPP_FAILED: SIP0: fman_fp_image: frr 0x1029 download to CPP failed Conditions: Occurs when you shut down a backup tunnel and shut down an FRR-protected interface, disabling TE tunnels. Workaround: None; the error does not impact traffic forwarding. • CSCtx75877 Symptoms: ICMP unreachable messages are sent when a route for the destination ip address exists in the routing table. There is no ACL applied on any of the interface. Conditions: Occurs under the following conditions: – There is a VRRP configuration applied to incoming interfaces. – There are not ACLs applied on any interface. – Your reload the router. Workaround: There is no workaround. • CSCtx77233 Symptoms: The router displays an error message similar to the following: FMFP-3-OBJ_DWNLD_TO_CPP_FAILED: SIP0: fman_fp_image: frr 0x1029 download to CPP failed Conditions: Occurs when you shut down a backup tunnel interface and a FRR-protected interface, bringing down MPLS TE tunnels. Workaround: There is no workaround; the error does not appear to impact traffic forwarding.

OL-26630-12 Chapter Restrictions and Caveats in Cisco IOS XE 3.6S Releases Caveats in Cisco IOS XE 3.6S Releases • CSCtx80446 Symptoms: When the no authentication command is run on one BFD template, other MHOP BFD sessions on which authentication has been configured may change to the Down state. Conditions: This issue is observed when there are multiple sessions that use different maps and templates. Workaround: There is no workaround. • CSCtx81871 Symptoms: MPLS convergence time is higher than normal. Conditions: Occurs when the router is processing more than 3107 iBGP and label prefixes. Workaround: There is no workaround. • CSCty03480 Symptoms: The interface manager crashes when you remove a BFD template. Conditions: Occurs when you remove a BFD template or modify an MPLS-TP label. Workaround: There is no workaround. • CSCty03617 Symptoms: The router displays the following message when executing a Stateful Switchover (SSO): %TRANSCEIVER-3-CHECKSUM_ERROR Conditions: Occurs intermittently when the router is in SSO mode and performing a switchover between RSPs. The console displays this message repeatedly on the new active RSP. Workaround: There is no workaround. • CSCty13332 Symptoms: An imposition failure occurs on VCs configured with MPLS TP LSPs. Conditions: Occurs under the following conditions: – There are input and output QoS policy-maps configured on service instance interfaces. – The router is configured with 255 MPLS TP tunnels. – The router is configured with a high number of virtual circuits (VCs). – The RSP in slot 0 is acting as the active RSP. – An event occurs that causes the router to tear down and rebuild all MPLS TP tunnels and VCs at once. Workaround: Remove and reconfigure the service instance. • CSCty13699 Symptoms: When L2VPN Pseudowire Stitching is configured between a static segment and a dynamic segment, both segments may move to the Down state. Conditions: This issue is observed when L2VPN Pseudowire Stitching is configured between a static segment and a dynamic segment. Workaround: There is no workaround. • CSCty22165 Symptoms: The router displays the following console message: Transceiver initialization failed: Unable to display idprom.

OL-26630-12 Chapter Restrictions and Caveats in Cisco IOS XE 3.6S Releases Caveats in Cisco IOS XE 3.6S Releases Conditions: The issue can occur when you perform an online insertion and removal (OIR) of an OC-3 interface module. Workaround: Perform a hard OIR (IM replacement) followed by a soft OIR (RSP switchover) on the router. • CSCty24143 Symptoms: The router does not pass IPv6 OSPF traffic. Conditions: Occurs when the router passes traffic at the full line rate of a link. Workaround: Reduce the traffic rate by 10%. • CSCty26726 Symptoms: The IOS kernel crashes. Conditions: Occurs following a reload on a dual RSP system. Workaround: Power cycle the router. • CSCty28986 Symptoms: A configuration with a high number of down MEPs does not function properly. Conditions: Occurs when you configure 500 or more down MEPs with 500 or more xconnect configurations between service instances. Workaround: Configure no more than 300 CFM sessions. • CSCty29449 Symptoms: The router crashes. Conditions: The issue can occur when you shut down and reenable an interface module. Workaround: There is no workaround. • CSCty34054 Symptoms: The router displays CPU utilization traceback messages and drops all multicast traffic for 20–50 seconds. Conditions: Occurs under the following conditions: – Multicast is enabled with more than 500 multicast groups – The router is using RSP1B in SSM mode – BDI is configured on the access side of the router – There are 24 EFPs on each bridge domain – You enter a shutdown command on the access interface. Workaround: There is no workaround. • CSCty34521 Symptoms: The router does not pass CFM traffic over an Ethernet CFM cross-connect. Conditions: Occurs under the following conditions: – There is a CFM xconnect between two Cisco ASR 903 Router devices – You perform an OIR and set a default interface. Workaround: Do not continuously perform an OIR and set a default interface.

OL-26630-12 Chapter Restrictions and Caveats in Cisco IOS XE 3.6S Releases Caveats in Cisco IOS XE 3.6S Releases • CSCty34812 Symptoms: The router experiences traffic loss for between 10 and 50 seconds during RSP switchover. Conditions: Occurs when you perform an RSP switchover on a router with a ten gigabit Ethernet interface module. Workaround: There is no workaround. • CSCty35365 Symptoms: The router drops traffic passing across ATM MPLS layer 2 virtual circuits (VCs). Conditions: Occurs when you increase the scale above 100 VCs. Workaround: There is no workaround. • CSCty37479 Symptoms: The line protocol repeatedly drops (flaps) on serial interfaces. Conditions: Occurs when you configure HDLC or PPP on serial interfaces on the A900-IMA4OS or A900-IMA16D interface modules when the router is passing high traffic volumes. Workaround: Configure the no keepalive command on serial interfaces. • CSCty38638 Symptoms: The router cannot download the ACL database. Conditions: Occurs when the router is configured with an ACL containing more than 400 access control entries (ACEs). Workaround: There is no workaround. • CSCty39033 Symptoms: Interface modules stop passing traffic during an RSP switchover. Conditions: Occurs when the router switches over to the standby RSP while traffic is passing on interface modules. Workaround: There is no workaround. • CSCty41536 Symptoms: The router crashes during when SNMP uses a high percentage of CPU for an extended period. Conditions: Occurs when SNMP is running the background with an average of 50% CPU utilization for more than 8 hours. Workaround: Reduce the load on the CPU using SNMP poll and SNMP walk. • CSCty42336 Symptoms: BFD sessions flap on the router. Conditions: Occurs when the router is running IP BFD sessions in echo mode with 64 200ms X3 timers. Workaround: There is no workaround. • CSCty42867 Symptoms: The router crashes. Conditions: Occurs when you apply traffic soaking to the router with L2VPN services configured. Workaround: There is no workaround.

OL-26630-12 Chapter Restrictions and Caveats in Cisco IOS XE 3.6S Releases Caveats in Cisco IOS XE 3.6S Releases • CSCty44345 Symptoms: The router experiences packet drops when passing 64 byte packets. Conditions: Occurs when the router is passing 64 byte packets at the line rate on the OC-3 interface module. Workaround: Configure a larger packet size on the interface. • CSCty45058 Symptoms: Some CEM groups do not function correctly. Conditions: Occurs when you configure more than 196 CEM groups on the T1/E1 or OC-3 interface module. Workaround: There is no workaround; avoid configuring more than 196 CEM groups. • CSCty45463 Symptoms: The router stops passing VPLS unicast traffic. Conditions: Occurs after you reload the router while it is passing VPLS unicast traffic. Workaround: Perform one of the following actions: – Clear the mac-address table on the affected virtual circuit (VC) – Stop VPLS traffic until the MAC address table is cleared, then resume VPLS traffic. • CSCty46058 Symptoms: Shutting down a static multisegment VFI causes traffic to flow in one direction. Conditions: This issue is observed when you configure a point-to-point VFI with two static neighbors and then shut down the VFI by using the shutdown command. Workaround: There is no workaround. • CSCty48710 Symptoms: The router drops multicast packets on layer 3 interfaces. Conditions: Occurs when you configure 63 bridge domains per port and the router sends IGMP joins from all of the bridge domains to the same IGMP group. Workaround: You can apply the following workarounds: – Applying a policy-map on each EVC can reduce the packet drops to some extent. – Increase the default port queue size. • CSCty49041 Symptoms: The router drops VPLS traffic on one or more virtual circuits (VCs). Conditions: Occurs when you reload a CPE or UPE device when there approximately 100 VCs configured between the UPE and NPE devices. Workaround: Issue the clear xconnect command on the affected VC. • CSCty49157 Symptoms: Some members in an IMA group do not become active even though the interface controllers are up. Conditions: Occurs when you perform an OIR on a remote line card or when the standby RSP becomes the active RSP. Workaround: There is no workaround. • CSCty50377

OL-26630-12 Chapter Restrictions and Caveats in Cisco IOS XE 3.6S Releases Caveats in Cisco IOS XE 3.6S Releases Symptoms: The OC-3 interface module crashes when you perform multiple RSP switchovers. Conditions: Occurs when the router is running a CEM configuration configured at full scale on all ports and passing traffic. Workaround: There is no workaround. • CSCty51175 Symptoms: Serial interfaces configured with HDLC display false LOF or AIS alarms. Conditions: Occurs when you configure a high volume of serial interfaces using HDLC. Workaround: Remove and re-apply the serial interface configuration. • CSCty51257 Symptoms: The T1/E1 interface module changes to inserted state during an in-service software upgrade (ISSU), causing the interface to fail and the router to generate a core file. Conditions: Occurs when you perform an in-service software upgrade (ISSU) on a router with a T1/E1 interface module. Workaround: Issue the shutdown command on the interface module before beginning ISSU; after ISSU is complete, issue the no shutdown command on the interface module. • CSCty51984 Symptoms: CEM circuits become inactive. Conditions: Occurs when you perform an OIR, reload, or when you reconfigure a CEM circuit on the router. The issue occurs more consistently when the router is running more than 300 CEM circuits. Workaround: Issue the clear xconnect all command. • CSCty51990 Symptoms: The router may crash or restart; the console displays a SW_WDOG: expired message. Conditions: Occurs under the following conditions: – The router is configured with 63 or more instances of a unique EVC configured with a unique bridge domain interface (BDI). – The router is sending IGMP joins to one multicast group. – You perform a shutdown/no shutdown on the interface sending IGMP join messages. – You perform an OIR on the router. Workaround: There is no workaround. • CSCty57746 Symptoms: The show environment command displays incorrect values, including P0 and P1 voltages, PSU status, PSU voltage, and critical alarms. Conditions: Occurs when you apply the show environment command. Workaround: There is no workaround. • CSCty57751 Symptoms: The router crashes. Conditions: Occurs under any of the following conditions: – You perform an OIR on an interface module. – You issue the no ppp multilink command on all MLP member links.

OL-26630-12 Chapter Restrictions and Caveats in Cisco IOS XE 3.6S Releases Caveats in Cisco IOS XE 3.6S Releases – You set the MTU to a higher value on an MLP bundle. Workaround: There is no workaround. • CSCty61660 Symptoms: The Cisco ASR 903 Router displays a core dump file. Conditions: Occurs when the remote PE device is reloaded while running VPLS-TP. Workaround: There is no workaround. • CSCty66871 Symptoms: The router stops forwarding traffic across one or more EoMPLS virtual circuits (VC)s. Conditions: Occurs when you perform a shut/no shutdown on the MPLS TE tunnel carrying the VC. Workaround: Issue the clear xconnect command on the VC. • CSCty70034 Symptoms: The router floods all EFPs in the sam e split horizon group with IGMP join messages. Conditions: Occurs when the router is sending an IGMP join containing a dot1q tag for one EVC. Workaround: None. • CSCty72251 Symptoms: The router drops traffic following a reload. Conditions: Occurs when you reload the router while running a VRF configuration. Workaround: Remove the configuration, reload the router, and re-apply the configuration. • CSCty72901 Symptoms: Some CEM groups do not function correctly. Conditions: Occurs when you configure more than 196 CEM groups on the T1/E1 or OC-3 interface module. Workaround: There is no workaround; avoid configuring more than 196 CEM groups. • CSCty73142 Symptoms: An IPC Init failure occurs during downgrade, which makes the standby reload continuously. Conditions: Occurs when you perform an ISSU downgrade from IOS XE 3.6 to IOS XE 3.5.1 or 3.5. Workaround: There is no workaround. • CSCty73362 Symptoms: The router experiences CPP download failures when sending IGMP join messages. Conditions: Occurs when the router is configured with a trunk EFP in SM mode on the access side and is sending IGMP join messages to more than 1970 multicast groups. Workaround: There is no workaround. • CSCty73365 Symptoms: The router drops traffic on ATM subinterfaces using layer 2 PVCs. Conditions: Occurs when you create 255 or more ATM PVCs. Workaround: There is no workaround.

OL-26630-12 Chapter Restrictions and Caveats in Cisco IOS XE 3.6S Releases Caveats in Cisco IOS XE 3.6S Releases • CSCty73528 Symptoms: The router displays core dump files. Conditions: Occurs when you perform an RSP switchover when CEF routes are configured. Workaround: There is no workaround. • CSCty74058 Symptoms: The router sends traffic for virtual circuits (VCs) over Gigabit Ethernet interfaces instead of MPLS-TP tunnels. Conditions: Occurs when you perform an interface module OIR and the VCs are configured with a preferred path as the MPLS-TP tunnel. Workaround: There is no workaround. • CSCty74062 Symptoms: The router does not pass MLP traffic. Conditions: Occurs when you perform an RSP switchover with an existing MLP configuration. Workaround: There is no workaround. • CSCty74129 Symptoms: A REP topology may reconverge during an RSP switchover. The consoles displays REP no-neighbor messages. Conditions: Occurs when you configure REP between two Cisco ASR 903 Routers and you perform an RSP switchover. Workaround: There is no workaround. • CSCty77704 Symptoms: CFM traceroute fails between two CE devices. Conditions: Occurs under the following conditions: – There is a CFM xconnect between higher-level MEPs – The MEPs are between CE devices – The CE devices are in a different domain. Workaround: Disable CFM on the Cisco ASR 903 Router acting as a PE device. • CSCty79273 Symptoms: Multicast replication does not occur on all BDI interfaces on a given trunk EFP. Conditions: Occurs under the following conditions: – The router is configured with 63 or more BDIs – The BDIs are configured as OIFs on a trunk EFP. – The port on which the EFP is configured is in a multicast group. Workaround: There is no workaround. • CSCty80326 Symptoms: The router displays an Eamapper error. Conditions: Occurs under the following conditions: – The router is configured with a port channel interface with 2 member links. – The port channel

OL-26630-12 Chapter Restrictions and Caveats in Cisco IOS XE 3.6S Releases Caveats in Cisco IOS XE 3.6S Releases – The configuration contains 48 EFPs with 24 EFPs in a given bridge domain – SSM is enabled on the local and a remote router – The router sends an IGMP join to a single multicast group. Workaround: There is no workaround. • CSCty87424 Symptoms: The router experiences a drop in forwarded packets on an MLPPP bundle. Conditions: Occurs when the bundle is using 64% or more of the available bandwidth and an MTU value is configured on the bundle. Workaround: There is no workaround. • CSCty90425 Symptoms: The router crashes and reboots. Conditions: Occurs when you perform a longevity test with traffic soaking while using Ethernet features such as EoMPLS, VPLS, CFM, or Y1731. Workaround: There is no workaround. • CSCty92979 Symptoms: The router loses ARP table entries after a network link flaps. Conditions: Occurs following a network link flap when the router’s ARP table contains entries for next-hop neighbors connected over a router bridge domain interface. Workaround: There is no workaround. • CSCty93985 Symptoms: Egress QoS policies do not take effect on an EFP interface. Conditions: Occurs when you apply an egress QoS policy to an interface configured with more than 37 EFPs. Workaround: There is no workaround. • CSCty94081 Symptoms: The router displays an EgBridgeError_0 error when sending multicast traffic. Conditions: Occurs in the following conditions: – There are 40 bridge domain interfaces (BDIs) sending IGMP joins to a single multicast group. – There are more than 40 OIFs and 24 EVCs in each bridge domain. Workaround: There is no workaround. • CSCty94437 Symptoms: The router crashes during RSP switchover or bootup. Conditions: Occurs when L2VPN services are passing bidirectional traffic on the router and you perform a reload or RSP switchover. Workaround: There is no workaround. • CSCty96326 Symptoms: The router crashes. Conditions: Occurs during bootup when the router is running BFD and CFM sessions that are offloaded to hardware.

OL-26630-12 Chapter Restrictions and Caveats in Cisco IOS XE 3.6S Releases Caveats in Cisco IOS XE 3.6S Releases Workaround: There is no workaround. • CSCty96797 Symptoms: L2 OIF replication does not take effect when you add or delete an EVC. Conditions: Occurs after a bridge domain or split horizon group change. Workaround: There is no workaround. Resolved Caveats—Cisco IOS XE Release 3.6(0)S This section documents the issues that have been resolved in Cisco IOS XE Release 3.6(0)S. • CSCtx47195 Symptoms: BFD flaps when you perform a RSP switchover. Conditions: Occurs under the following conditions: – The router is configured as a mid-point node. – The router is running MPLS-TP sessions with BFD. – You perform a soft OIR. Workaround: None. • CSCtx83922 Symptoms: Interfaces go into a down-down state. Conditions: The issue can occur when you use a script to implement a full-scale configuration. Workaround: Perform an RSP switchover on both sides of the connection. • CSCty04161 Symptoms: The RSP is unable to modify the configuration file or execute show interface commands. Conditions: Occurs following an RSP switchover. Workaround: None. • CSCty43582 Symptoms: The router does not save the port-channel load-balance-hash-algo command in the running configuration. Conditions: Occurs when you select the src-ip, dst-ip, or src-dst-ip hash algorithm. Workaround: None. • CSCty44236 Symptoms: Traffic switches over the protect-lsp of a mpls-tp tunnel interface, even though corresponding working-lsp link is active. Conditions: Occurs when the protect-lsp bfd goes down while the protect lsp out-link interface going down. Workaround: None. • CSCty58020 Symptoms: Policy-map counters do not function properly. Conditions: Occurs when you configure an ACL-based class-map under a policy-map.

OL-26630-12 Chapter Restrictions and Caveats in Cisco IOS XE 3.6S Releases Caveats in Cisco IOS XE 3.6S Releases Workaround: None.

OL-26630-12 Chapter Restrictions and Caveats in Cisco IOS XE 3.6S Releases Caveats in Cisco IOS XE 3.6S Releases

1 Cisco IOS XE 3S Release Notes for the Cisco ASR 903 Router OL-26630-12 10 Restrictions and Caveats in Cisco IOS XE 3.7S Releases This chapter provides information about restrictions and caveats in Cisco IOS XE 3.7S releases. Note Because Cisco IOS XE 37S is based on Cisco IOS XE 3.5 inherited releases, some caveats that apply to Cisco IOS XE 3.5 releases also apply to Cisco IOS XE 37S. Release 3.5 is not described in this document; for a list of the software caveats that apply to Cisco IOS XE 3.5, see the Release Notes for Cisco IOS XE Release 3S. Note We recommend that you view the field notices for the current release to determine whether your software or hardware platforms are affected. You can access field notices at http://www.cisco.com/en/US/support/tsd_products_field_notice_summary.html. This chapter contains the following sections: • Limitations and Restrictions, page 2 • Caveats in Cisco IOS XE 3.7S Releases, page 5

OL-26630-12 Chapter Limitations and Restrictions Limitations and Restrictions The following sections describe the Cisco ASR 903 Router limitations in IO S XE 3.7 releases: • Limitations and Restrictions in Cisco IOS XE Release 3.7(5)S, page 2 • Limitations and Restrictions in Cisco IOS XE Release 3.7(4)S, page 2 • Limitations and Restrictions in Cisco IOS XE Release 3.7(3)S, page 2 • Limitations and Restrictions in Cisco IOS XE Release 3.7(2)S, page 2 • Limitations and Restrictions in Cisco IOS XE Release 3.7(1)aS, page 3 • Limitations and Restrictions in Cisco IOS XE Release 3.7(0)S, page 3 Limitations and Restrictions in Cisco IOS XE Release 3.7(5)S There are no changes in limitations and restrictions in Cisco IOS XE Release 3.7(5)S; the restrictions from IOS XE Release 3.7(2)S still apply. Limitations and Restrictions in Cisco IOS XE Release 3.7(4)S There are no changes in limitations and restrictions in Cisco IOS XE Release 3.7(4)S; the restrictions from IOS XE Release 3.7(2)S still apply. Limitations and Restrictions in Cisco IOS XE Release 3.7(3)S There are no changes in limitations and restrictions in Cisco IOS XE Release 3.7(3)S; the restrictions from IOS XE Release 3.7(2)S still apply. Limitations and Restrictions in Cisco IOS XE Release 3.7(2)S The following limitations and restrictions apply to Cisco IOS XE Release 3.7(2)S for the Cisco ASR 903 Router: • LFA FRR Limitations—Release 3.7.2 has the following limitations for Loop Free Alternate Fast-reroute (LFA FRR): – To enable LFA FRR, you must include the mpls ldp explicit-null command. The implicit-null command is not supported. – LFA FRR is not supported with equal cost multipath (ECMP). – The ASR 903 supports up to 4000 LFA FRR routes. – Remote LFA tunnels are not HA aware; hence they are SSO co-existent but not SSO compliant. • The restrictions from IOS XE Release 3.7(0)S apply to Release 3.7(2). For more information, see Limitations and Restrictions in Cisco IOS XE Release 3.7(0)S, page 3.

OL-26630-12 Chapter Limitations and Restrictions Limitations and Restrictions in Cisco IOS XE Release 3.7(1)aS There are no changes in limitations and restrictions in Cisco IOS XE Release 3.7(1)aS; the restrictions from IOS XE Release 3.7(0)S still apply. Limitations and Restrictions in Cisco IOS XE Release 3.7(0)S The following limitations apply to the Cisco ASR 903 Router in IOS XE Release 3.7(0)S: TDM Limitation • The configure replace command is not supported for TDM interfaces. ATM IMA Limitation • You can create a maximum of 16 IMA groups on each T1/E1 interface module. Bridge Domain Interface Limitation • The mtu command is not supported on BDI interfaces; however the ip mtu command is supported. Clocking and Timing Limitation • Only a single clocking input source can be configured within each group of eight ports (0-7 and 8-15) on the T1/E1 interface module using the network-clock input-source command. • Synchronous Ethernet clock sources are not supported with PTP. Conversely, PTP clock sources are not supported with synchronous Ethernet. However, you can use hybrid clocking to allow the router to obtain frequency using Synchronous Ethernet and phase using PTP. EFP Limitation • QinQ is not supported on trunk EFP interfaces. Equal Cost Multipath Limitation • The ASR 903 supports a maximum of 4 Equal Cost Multipath (ECMP) links. Ethernet IM Limitations • The Cisco ASR 903 Router does not support the Facilities Data Link (FDL) on Ethernet interfaces. • The Cisco ASR 903 Router does not support the mac-address command on Gigabit Ethernet interface modules. • 10 Gigabit Ethernet interface modules are not supported in slots 4 and 5. • When you install a Gigabit Ethernet IM in the topmost interface module slot (slot 5), the last interface (interface GigabitEthernet0/5/0) is not operational; the port is reserved for internal communication. • When you configure the copper and SFP Gigabit Ethernet interface modules on a router with redundant RSPs, the speed and duplex commands are not visible in interface configuration mode until you apply a shutdown/no shutdown to the interface. • LACP Fast-Switchover Limitation—Cisco IOS has a default carrier-delay value of 2 seconds. When an LACP link fails, the router does not perform a switchover until the carrier-delay timer expires. The carrier-delay command helps reduce this value. We recommend that you set a carrier-delay value of greater than 0 as this value can result in slower convergence times. We also recommend that you set an identical carrier-delay value on all LACP member links.

OL-26630-12 Chapter Limitations and Restrictions MLPPP Limitations The following limitations apply when using MLPPP on the Cisco ASR 903 Router: • All links in an MLPPP bundle must be on the same interface module. • All links in an MLPPP bundle must be of the same bandwidth. • The Cisco ASR 903 Router supports a maximum of 8 links per bundle • To change the MLPPP bundle fragmentation mode between enabled and disabled, perform a shutdown/no shutdown on the bundle. • LFI is not supported • Multiclass MLP is not supported • The Cisco ASR 903 Router supports MLPPP statistics with the following limitations: – Packet counters on the bundle display the number of fragments rather than packets. – Control packets are accounted on the bundle. • If you increase the maximum transmission unit (MTU) size on an MLPPP interface to a value higher than the maximum received reconstructed unit (MRRU) value on the peer interface, this can bring the MLPPP tunnel down. To restore the tunnel, perform a shutdown/no shutdown on the interface. MPLS VPN Limitation • MPLS VPN (L3VPN) Fragmentation does not function properly if an access interface has a higher MTU value than a core interface. To ensure that fragmentation functions correctly, configure the core interface MTU with a value that exceeds the access interface MTU and relevant headers. OC-3 IM Limitations • The configure replace command is not supported on the OC-3 IMs. • SDH framing mode is supported; SONET is not supported. • The optical interface module is designed for OC-3 and OC-12 traffic, but OC-12 functionality is not currently supported. • If you issue the no card type command on the controller, you must reload the router in order to configure a new card type value. • We recommend that you use Release 3.7.2 or later when using the OC-3 IM with high availability (HA) features such as stateful switchover (SSO). Pseudowire/AToM Limitation • The Cisco ASR 903 Router supports ATM over MPLS N-to-one cell mode for a single ATM Virtual Channel Connections (VCCs) or Permanent Virtual Circuits (PVCs) to a pseudowire, but does not support mapping to multiple VCCs or PVCs. • The Cisco ASR 903 Router does not support ATM over MPLS one-to-one cell mode. • The Cisco ASR 903 Router supports pseudowire ping using the CW method; pseudowire ping using the TTL method is not supported. • The Cisco ASR 903 Router supports a maximum of 2000 pseudowires in any combination. QoS Limitations • For a description of QoS features and limitations on the Cisco ASR 903 Router in release 3.7S, see http://www.cisco.com/en/US/docs/routers/asr903/software/guide/chassis/Release3.7.0S/ASR903- Chassis-SW-37.html.

OL-26630-12 Chapter Caveats in Cisco IOS XE 3.7S Releases Software Upgrade Limitation • We recommend you set the interface-module-delay value to 150 or greater in order to ensure sufficient time for IM software upgrades. Subinterfaces Limitation • The Cisco ASR 903 router does not support subinterface configurations except on ATM interfaces. Note You can configure similar functionality using multiple Ethernet Virtual Connections on an interface. For more information, see Configuring Ethernet Virtual Connections on the Cisco ASR 903 Router. T1/E1 IM Limitations • Inverting data on the T1/E1 interface is not supported—Inverting the data stream using the invert data interface command is not supported. • Bit error rate test (BERT) patterns have limited support—Currently, only the 2^11, 2^15, 2^20-O153, and 2^20-QRSS patterns are supported for BERT. Caveats in Cisco IOS XE 3.7S Releases Caveats describe unexpected behavior. Severity 1 caveats are the most serious caveats. Severity 2 caveats are less serious. Severity 3 caveats are moderate caveats and only select severity 3 caveats are included in this chapter. This section describes caveats in Cisco IOS XE 3.7S releases. In this section, the following information is provided for each caveat: • Symptom—A description of what is observed when the caveat occurs. • Conditions—The conditions under which the caveat has been known to occur. • Workaround—Solutions, if available, to counteract the caveat. Note If you have an account on Cisco.com, you can also use the Bug Toolkit to find select caveats of any severity. To reach the Bug Toolkit, log in to Cisco.com and go to http://www.cisco.com/pcgi-bin/Support/Bugtool/launch_bugtool.pl. (If the defect that you have requested cannot be displayed, this may be due to one or more of the following reasons: the defect number does not exist, the defect does not have a customer-visible description yet, or the defect has been marked Cisco Confidential.) The Dictionary of Internetworking Terms and Acronyms contains definitions of acronyms that are not defined in this document: http://docwiki.cisco.com/wiki/Category:Internetworking_Terms_and_Acronyms_(ITA) The following sections describe the open and resolved caveats in 3.7S Releases: • Open Caveats—Cisco IOS XE Release 3.7(5)S, page 7 • Resolved Caveats—Cisco IOS XE Release 3.7(5)S, page 8 • Open Caveats—Cisco IOS XE Release 3.7(4)S, page 10 • Resolved Caveats—Cisco IOS XE Release 3.7(4)S, page 13

OL-26630-12 Chapter Caveats in Cisco IOS XE 3.7S Releases • Open Caveats—Cisco IOS XE Release 3.7(3)S, page 21 • Resolved Caveats—Cisco IOS XE Release 3.7(3)S, page 24 • Open Caveats—Cisco IOS XE Release 3.7(2)S, page 40 • Resolved Caveats—Cisco IOS XE Release 3.7(2)S, page 48 • Open Caveats—Cisco IOS XE Release 3.7(1)aS, page 50 • Resolved Caveats—Cisco IOS XE Release 3.7(1)aS, page 54 • Open Caveats—Cisco IOS XE Release 3.7(0)S, page 56 • Resolved Caveats—Cisco IOS XE Release 3.7(0)S, page 63

OL-26630-12 Chapter Caveats in Cisco IOS XE 3.7S Releases Open Caveats—Cisco IOS XE Release 3.7(5)S This section documents the unexpected behavior that might be seen with the Cisco ASR 903 Router in Cisco IOS XE Release 3.7(5)S. • CSCtq24011 Symptoms: The routers acts as though local proxy-arp is configured and does a proxy-arp for the systems in the same subnet. Conditions: This issue occurs when the router receives ARP request on an interface when the interface is not fully initialized. The connected routes are not added in the routing table causing the proxy-arp to reply and thus the wrong ARP is entered. Workaround: Execute a shutdown followed by a no shutdown on the routers. • CSCty63969 Symptom: Ping fails to remote MEP. Conditions: This issue occurs on configure CFM and a ping to remote MEP with packet size greater than 1478 bytes is performed. Workaround: There is no workaround. • CSCtz43158 Symptom: Memory leaks are seen on configuring IP FRR remote LFA on the router. Conditions: This issue occurs on configuring and un-configuring IP-FRR remote LFA on the router. Workaround: There is no workaround. • CSCuc08397 Symptom: When IFM is configured on EVC BD, with encapsulation default in the core, the remote MEPS are not learned. Conditions: This issue is observed when encapsulation default is configured towards the core facing side. Workaround: There is no workaround. • CSCuc24927 Symptom: Segmentation faults observed on the router. Conditions: This issue is seen when IMA, CEM and Serial are configured on different controllers on the router and the image is loaded. Workaround: Do not combine IMA, CEM and Serial configurations. • CSCud55799 Symptom: Multiple priority commands get accepted per policy. Conditions: This issue occurs when a policy-map with priority is configured in one of its classes. Adding another class with policer first and then with priority causes this issue.. Workaround: There is no workaround. • CSCud90362 Symptom: The SYNC packets might go out quite irregularly when PTP master (OC/BC) is configured on the router. Conditions: This issue occurs when the router is configured as PTP master. Workaround: There is no workaround.

OL-26630-12 Chapter Caveats in Cisco IOS XE 3.7S Releases • CSCue73478 Symptom: The standby RSP Sync LED goes to holdover after switchover. Conditions: This issue occurs in normal working conditions. This is a cosmetic issue. Workaround: There is no workaround. • CSCuf35542 Symptom: PFM fails for about fiveminutes after OIR on the master. Conditions: This issue occurs when OIR is triggered on the master. Workaround: Wait for 5-6 minutes after the OIR • CSCug05214 Symptom: QOS does not reject policy-map with match EXP and extended num ACL (permit L4). Conditions: This issue occurs when the policy-map with match exp and L4 ACL is configured and applied on main interface. Workaround: There is no workaround. • CSCug08566 Symptom: Next-hop of a static redistributed route is unexpectedly marked as unreachable. Conditions: This issue occurs when redistributing a static route into BGP (in global or VRF table (X) ), whose next-hop points to another VRF (Y), the next-hop will be looked up in (X), and thus the route may be marked with next-hop unreachable. Workaround: Manually set the next-hop to 0 when redistributing using the set ip next-hop peer-address command. • CSCul01582 Symptom: The PID for the new fan tray is not reflected for show inventory command output. Conditions: This issue occurs when the show inventory command is issued. The fan tray PID does not show up for SNMP walk for Entity MIB. Workaround: There is no workaround. • CSCul50181 Symptom: The router may see unicast traffic not being forwarded out of the Gigabit Ethernet interface while multicast traffic is being processed by the router correctly. Pings fail to a directly connected neighbour but OSPF would be up. Conditions: This issue occurs when BDI configs are configured on the Gigabit Ethernet interface. Workaround: Reload the router. Resolved Caveats—Cisco IOS XE Release 3.7(5)S This section documents the resolved caveats for the Cisco ASR 903 Router in Cisco IOS XE Release 3.7(5)S. • CSCua20021 Symptom: The clear ethernet cfm ais command with evc option does not work. Conditions: This issue occurs when evc name with clear ethernet cfm ais command is specified. Workaround: Use the service option instead.

OL-26630-12 Chapter Caveats in Cisco IOS XE 3.7S Releases • CSCue69818 Symptom: The show inventory command displays wrong serial number. Conditions: This issue occurs when the inventory is managed by the main serial number. However the RPS and IM display PCB Serial Number in the show inventory output. Workaround: Use the show diag all eeprom detail command. • CSCuh76845 Symptom: OSPF is stuck in INIT after performing a shutdown followed by no shutdown of the OSPF process. The router shows an LSA to be present on flood-list in the show ip ospf flood-list command output. Conditions: This issue occurs after executing a shutdown followed by no shutdown of the OSPF process. The issue is only seen in timing conditions. Workaround: Execute a shutdown followed by no shutdown on the physical interface which has LSA on its flood-list. • CSCui50577 Symptom: Traffic drop observed on the router after IM OIR. Conditions: This issue occurs after an IM OIR. Workaround: There is no workaround. • CSCui73921 Symptom: The 10 Gigabit Ethernet Interface Power and Status LED on the IM does not working as expected. Conditions: This issue occurs on module OIR or reload. Workaround: There is no workaround. • CSCui85019 Symptom: Executing show xconnect results in a memory leak. This issue was observed after issuing the show memory debug leaks chunks command as in example below: Router# show memory debug leaks chunks Adding blocks for GD... I/O memory Address Size Alloc_pc PID Alloc-Proc Name Chunk Elements: AllocPC Address Size Parent Name Processor memory Address Size Alloc_pc PID Alloc-Proc Name AA3F8B4 2348 6D0B528 97 Exec PW/UDP VC event trace Conditions: This issue is observed when one or more xconnects are configured with UDP encapsulation. Workaround: There is no workaround. • CSCui89069 Symptom: An ISIS flap is observed on performing SSO. Conditions: This issue occurs when nsf ietf is configured and one or more loopbacks are configured as passive interfaces. Workaround: Perform the following; a. Use nsf cisco. b. Use nsf ietf and configure ip router isis process_name on the loopback interfaces.

OL-26630-12 Chapter Caveats in Cisco IOS XE 3.7S Releases • CSCui89854 Symptom: Mismatch of the Gigabit Ethernet interface when Wait-to-Restore (WTR) is configured. Conditions: This issue occurs when the Gigabit Ethernet interface is configured as input source and the WTR is configured as 0 and shutdown and no shutdown is executed. Workaround: Configure the WTR greater than 20 seconds. • CSCui99309 Symptom: IPv6 BFD with static client does not come up with VRF. Conditions: This issue is seen on configuring BFD. Workaround: There is no workaround. • CSCuj11232 Symptom: Changing the local label on an existing static (no signaling), Any Transport over MPLS (AToM) pseudowire, or changing the static pseudowire to a dynamic one (with LDP signaling) may cause traffic to fail to traverse the pseudowire. Conditions: This issue is observed when either the configured value of the static local label is changed, or if the pseudowire is changed to a dynamic one. Workaround: Unconfigure the existing xconnect or pseudowire before entering the new configuration. • CSCul14571 Symptom: The router crashes after OSPFv3 is unconfigured from an interface. Conditions: This issue is observed when NSR is enabled. Workaround: Unconfigure NSR before unconfiguring OSPFv3 from an interface. • CSCum40613 Symptom: The Cisco ASR 903 TOD port tx when configured as slave does not work. Conditions: This issue occurs when TOD is configured. Workaround: There is no workaround. Open Caveats—Cisco IOS XE Release 3.7(4)S This section documents the unexpected behavior that might be seen with the Cisco ASR 903 Router in Cisco IOS XE Release 3.7(4)S. • CSCtw92458 Symptom: IFM CC messages are leaked to unmatched encapsulation on that bridge domain (BD). Conditions: This issue occurs when EVCs with different encapsulation are present on same BD. Workaround: There is no workaround. • CSCty63969 Symptom: Ping fails to remote MEP. Conditions: This issue occurs when CFM is configured and a ping to remote MEP with packet size greater than 1478 bytes is executed. Workaround: There is no workaround. • CSCua77688

OL-26630-12 Chapter Caveats in Cisco IOS XE 3.7S Releases Symptom: The router experiences remote CFM MEP flapping. Conditions: Occurs when the router is connected via a CFM xconnect and the link is running a high traffic rate. Workaround: Reduce the rate of traffic. • CSCua99096 Symptoms: The show ima interface command omits some IMA group information such as ImaGroupSymmetry. Conditions: This issue occurs when the show ima interface command. Workaround: There is no workaround. • CSCub94462 Symptom: The router displays object download error messages on the console. Conditions: This issue occurs under the following conditions – Execute the mac address sticky command. – Configure 25 incremental MAC addresses and execute the clean mac-address-table bdomain command – Remove a mac security sticky configuration from an EVC interface. Workaround: Avoid issuing the clear mac-address-table command when the mac security sticky command is applied. • CSCuc08397 Symptom: When IFM is configured on EVC BD, with encapsulation default in the core, the remote MEPS are not learnt. Conditions: This issue is seen when encapsulation default is configured on the core facing side. Workaround: There is no workaround. • CSCud09142 Symptom: FP active error messages are seen when the tunnel-tp interface is removed in a high-availability setup. Conditions: This issue is seen after removing tunnel-tp interface. Workaround: There is no workaround. • CSCud34600 Symptom: Event hog messages are received when 21k to 25k routes are advertised into MBGP and exported from one PE to another. Conditions: This issue occurs when the redistributing routes range from 21k to 25k routes from OSFP are moved into MBGP and are exported from one PE to another. Workaround: There is no workaround. • CSCud90362 Symptom: the SYNC packets go out quite irregularly when PTP master is configured. Conditions: This issue is seen when the router is configured as PTP master. Workaround: There is no workaround. • CSCue24854 Symptom: Loss of 70 msec are observed when performing an IM OIR in a remote LFA ring.

OL-26630-12 Chapter Caveats in Cisco IOS XE 3.7S Releases Conditions: This issue occurs when soft OIR is performed. Workaround: Do a hard OIR to get less than 50 msec loss. • CSCue73478 Symptom: The standby RSP Sync LED become holdover after switchover. Conditions: This issue occurs in normal conditions, Workaround: There is no workaround. This issue is cosmetic. • CSCue96886 Symptom: Complete MAC Address space is not available on the RSP. Conditions: This issue occurs after removing the service instance with the MAC Addresses learnt on the BD. Workaround: Shutdown the service instance corresponding to bridge-domain and clear the MAC-address-table of that bridge-domain. Remove the service instance. • CSCuf07508 Symptom: The Gigabit Ethernet port on IMA8S may not come up after reload. Conditions: This issue occurs when the router is reloaded multiple times Workaround: Perform an IM OIR. • CSCuf44077 Symptom: The show interface command output displays incorrect speed values after SSO. Conditions: This issue occurs when 100M SFPs are used Workaround: Perform hardware module reset. • CSCuf86247 Symptom: SNMP MIB variables related to BDI counters do not function properly. Conditions: This issue occurs when SNMP MIB variables related to BDI interface counters are used. Workaround: There is no workaround. • CSCuh46103 Symptom: The BDI statistics not getting incremented. Conditions: This issue is observed when the show interface bdi statistics command is executed. The ingress and egress statistics displayed do not get incremented even if the traffic is going through the BDI interface. Workaround: Use show platform hardware pp active interface statistics bdi command to view the statistics. • CSCuh65489 Symptom: The BGP session goes down when ICMP echo-request of 1500 pps is received. Conditions: This issue occurs when the router has BGP peers and receives the ICMP-echo request. The BGP hold timer expires nd BGP peer goes down. Workaround: There is no workaround. • CSCuh79730 Symptom: The transmitting frequency is incorrectly displayed in case of DWDM-XFP-C.