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Table Of Contents
Release Notes for Cisco IOS XR Software Release 3.8.4
Key Changes from Previous Releases in Cisco IOS XR Release 3.8.4
Minimum and Preferred Cisco IOS Image and Boot Helper Levels for Migration
Determining Your Software Version
New Software Features in Cisco IOS XR Software Release 3.8.4
New Software Features Supported on All Platforms
RSVP as a percentage of Interface BW
eBGP Multihop with Labeled Unicast
Enhanced Process Distribution to Improve Load-Balancing Across Cisco CRS-1 RPs
Cisco CRS-1 Router-Specific Software Features
Automatic Fabric Plane Disabling
controllers fabric capacity threshold
Cisco XR 12000 Series Router-Specific Software Features
New Hardware Features for Cisco IOS XR Software Release 3.8.4
Cisco CRS-1 Router-Specific Hardware Features
Cisco XR 12000 Series Router-Specific Hardware Features
Minimum Flash Disk Requirements When Upgrading to Release 3.8.4
Caveats Specific to the Cisco CRS-1 Router
Caveats Specific to the Cisco XR 12000 Series Router
Resolved Cisco IOS XR Software PSIRT-Related Caveats
Upgrading Cisco IOS XR Software
Obtaining Documentation and Submitting a Service Request
Release Notes for Cisco IOS XR Software Release 3.8.4
April 9, 2013
Cisco IOS XR Software Release 3.8.4
Text Part Number OL-22675-01
These release notes describe the features provided in the Cisco IOS XR Software Release 3.8.4 and are updated as needed.
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For information about Cisco IOS XR Software Release 3.8.4, see the "Important Notes" section.
You can find the most current Cisco IOS XR software documentation on the World Wide Web at: http://www.cisco.com/en/US/partner/products/ps5845/tsd_products_support_series_home.html
These electronic documents may contain updates and modifications. For more information on obtaining Cisco documentation, see the "Obtaining Documentation and Submitting a Service Request" section on page 45.
For a list of software caveats that apply to Cisco IOS XR Software Release 3.8.4, see the "Caveats" section. The caveats are updated for every release and are described on the World Wide Web at: www.cisco.com
We recommend that you view the field notices for this release to see if your software or hardware platforms are affected at: http://www.cisco.com/public/support/tac/fn_index.html
Key Changes from Previous Releases in Cisco IOS XR Release 3.8.4
Cisco IOS XR Software Release 3.8.4 requires a 2-GB flash disk as a minimum. Therefore, you must upgrade an existing PCMCIA 1-GB flash disk to 2 GB or 4 GB before upgrading to Cisco IOS XR Software Release 3.8.4. For more information, see the "Minimum Flash Disk Requirements When Upgrading to Release 3.8.4" section.
Contents
These release notes contain the following sections:
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Introduction
Cisco IOS XR software is a distributed operating system designed for continuous system operation combined with service flexibility and high performance.
Cisco IOS XR software provides the following features and benefits:
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For more information about new features provided on various platforms for Cisco IOS XR Software Release 3.8.4, see the "New Software Features in Cisco IOS XR Software Release 3.8.4" section in this document.
System Requirements
Cisco IOS XR Software Release 3.8.4 supports the following platforms:
To determine the software versions or levels of your current system, see the "Determining Your Software Version" section.
Cisco CRS-1 Router
This section describes the system requirements for Cisco IOS XR Software Release 3.8.4 supported on the Cisco CRS-1 router platform. The system requirements include the following information:
To determine the software versions or levels of your current system, see Determining Your Software Version.
Feature Set Table
Cisco IOS XR software is packaged in feature sets (also called software images). Each feature set contains a specific set of Cisco IOS XR Software Release 3.8.4 features. Table 1 lists the Cisco IOS XR software feature set matrix (PIE files) and associated filenames available for the Cisco IOS XR Software Release 3.8 supported on the Cisco CRS-1.
Table 1 Cisco CRS-1 Supported Feature Sets
(Cisco IOS XR Software Release 3.8.4 PIE Files)Cisco IOS XR IP Unicast Routing Core Bundle
comp-hfr-mini.pie-3.8.4
Contains the required core packages, including OS, Admin, Base, Forwarding, Modular Services Card, Routing, SNMP Agent, and Alarm Correlation.
Cisco IOS XR IP Unicast Routing Core Bundle
comp-hfr-mini.vm-3.8.4
Contains the required core packages including OS, Admin, Base, Forwarding, Modular Services Card, Routing, SNMP Agent, and Alarm Correlation.
Cisco IOS XR Manageability Package
hfr-mgbl-p.pie-3.8.4
Cisco IOS XR MPLS Package
hfr-mpls-p.pie-3.8.4
MPLS-TE4 , LDP5 , MPLS Forwarding, MPLS OAM6 , LMP7 , OUNI8 , RSVP9 , and Layer 2 VPN and Layer 3 VPN.
Cisco IOS XR Multicast Package
hfr-mcast-p.pie-3.8.4
Multicast Routing Protocols (PIM, MSDP10 , IGMP11 , Auto-RP), Tools (SAP, MTrace), and Infrastructure (MRIB12 , MURIB13 , MFWD14 ), and BIDIR-PIM15 .
Cisco IOS XR Security Package
hfr-k9sec-p.pie-3.8.4
Support for Encryption, Decryption, IPSec16 , SSH17 , SSL18 , and PKI19 (Software based IPSec support—maximum of 500 tunnels)
Cisco IOS XR Documentation Package
hfr-doc.pie-3.8.4
Man pages for Cisco IOS XR CLI commands
Cisco IOS XR FPD Package
hfr-fpd.pie-3.8.4
Firmware for Fixed PLIM20 and SPA21 modules as well as ROMMON22 images for Cisco CRS-1 chassis.
Cisco IOS XR Diagnostic Package
hfr-diags-p.pie-3.8.4
Diagnostic utilities for Cisco IOS XR routers.
1 Packages installed individually
2 CORBA = Common Object Request Broker Architecture
3 Extensible Markup Language
4 MPLS Traffic Engineering
5 Label Distribution Protocol
6 Operations, Administration, and Maintenance
7 Link Manager Protocol
8 Optical User Network Interface
9 Resource Reservation Protocol
10 Multicast Source Discovery Protocol
11 Internet Group Management Protocol
12 Multicast Routing Information Base
13 Multicast-Unicast RIB
14 Multicast forwarding
15 Bidirectional Protocol Independent Multicast
16 IP Security
17 Secure Shell
18 Secure Socket Layer
19 Public-key infrastructure
20 Physical layer interface module
21 Shared port adapters
22 ROM monitor
Table 2 lists the Cisco CRS-1 TAR files.
Memory Requirements
Caution
The minimum memory requirements for Cisco CRS-1 running Cisco IOS XR Software Release 3.8.4 consist of the following:
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Hardware Supported
All hardware features are supported on Cisco IOS XR software, subject to the memory requirements specified in the "Memory Requirements" section.
The following table lists the supported hardware components on the Cisco CRS-1 and the minimum required software versions. For more information, see the "Other Firmware Support" section.
Software Compatibility
Cisco IOS XR Software Release 3.8.4 is compatible with the following Cisco CRS-1 systems:
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Other Firmware Support
The Cisco CRS-1 router supports the following firmware code:
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For information about upgrading the ROMMON, see http://www.cisco.com/en/US/docs/ios_xr_sw/iosxr_r3.8/rommon/configuration/guide/rm38.html
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Cisco XR 12000 Series Router
This section describes the system requirements for Cisco IOS XR Software Release 3.8.4 supported on the Cisco XR 12000 Series Router. The system requirements include the following information:
To determine the software versions or levels of your current system, see "Determining Your Software Version" section.
Feature Set Table
Cisco IOS XR software is packaged in feature sets (also called software images). Each feature set contains a specific set of Cisco IOS XR Software Release 3.8.4 features. Table 4 lists the Cisco IOS XR software feature set matrix (PIE files) and associated filenames available for Cisco IOS XR Software Release 3.8.4, supported on the Cisco XR 12000 Series Router.
Table 4 Cisco XR 12000 Series Router Supported Feature Set (Cisco IOS XR Software
Release 3.8.4 PIE Files)Cisco IOS XR IP Unicast Routing Core Bundle
c12k-mini.pie-3.8.4
Contains the required core packages, including OS, Admin, Base, Forwarding, Routing, SNMP Agent, and Alarm Correlation.
Cisco IOS XR IP Unicast Routing Core Bundle
c12k-mini.vm-3.8.4
Contains the required core packages including OS, Admin, Base, Forwarding, and Routing SNMP Agent, and Alarm Correlation.
Cisco IOS XR Manageability Package
c12k-mgbl.pie-3.8.4
CORBA2 agent, XML Parser, and HTTP server packages.
Cisco IOS XR MPLS Package
c12k-mpls.pie-3.8.4
MPLS-TE3 , LDP 4 , MPLS Forwarding, MPLS OAM5 , LMP6 , OUNI7 , and RSVP8 .
Cisco IOS XR Multicast Package
c12k-mcast.pie-3.8.4
Multicast Routing Protocols (PIM9 , MSDP10 , IGMP11 , Auto-RP, BSR12 ), Tools (SAP, MTrace, MRINFO), and Infrastructure (MRIB13 , MURIB14 , MFWD15 ).
Cisco IOS XR Security Package
c12k-k9sec.pie-3.8.4
Support for Encryption, Decryption, IPSec16 , SSH17 , SSL18 , and PKI19 .
Software based IPSec support: maximum of 500 tunnels or Hardware based IPSec: maximum of 64K tunnels using the SPA-IPSEC-2G-2Cisco IOS XR Standby RP Boot Image
mbiprp-rp.vm-3.8.4
Support for booting the Standby RP on a Cisco XR 12000 Series Router.
Cisco IOS XR Service IPsec Controller Package
c12k-ipsec-service.pie-3.8.4
Support for service-ipsec and service-gre interfaces in Cisco IOS XR software.
Cisco IOS XR Firewall Package
c12k-firewall.pie-3.8.4
Support for Virtual Firewall (VFW) on a Cisco XR 12000 Series Router.
Cisco IOS XR Documentation Package
c12k-doc.pie-3.8.4
Man pages for Cisco IOS XR CLI commands.
Cisco IOS XR FPD Package
c12k-fpd.pie-3.8.4
Firmware for shared port adapters (SPA) and for fixed port line cards supported in Cisco IOS XR.
Cisco IOS XR Diagnostic Package
c12k-diags.pie-3.8.4
Diagnostic utilities for Cisco IOS XR routers.
1 Packages installed individually
2 CORBA = Common Object Request Broker Architecture
3 MPLS Traffic Engineering
4 Label Distribution Protocol
5 Operations, Administration, and Maintenance
6 Link Manager Protocol
7 Optical User Network Interface
8 Resource Reservation Protocol
9 Protocol Independent Multicast
10 Multicast Source Discovery Protocol
11 Internet Group Management Protocol
12 Bootstrap router
13 Multicast Routing Information Base
14 Multicast-Unicast RIB
15 Multicast forwarding
16 IP Security
17 Secure Shell
18 Secure Socket Layer
19 Physical layer interface module
Table 5 lists the Cisco XR 12000 Series Router TAR files.
Memory Requirements
Caution
The minimum memory requirements for Cisco XR 12000 Series Routers running Cisco IOS XR Software Release 3.8.4 consist of the following:
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Hardware Supported
Cisco IOS XR Software Release 3.8.4 supports the Cisco XR 12000 Series Router. All hardware features are supported on Cisco IOS XR software, subject to the memory requirements specified in the "Memory Requirements" section.
Table 6 lists the supported hardware components on the Cisco XR 12000 Series Router and the minimum required software versions. For more information, see the "Determining Your Software Version" section.
Software Compatibility
Cisco IOS XR Software Release 3.8.4 is compatible with the following Cisco XR 12000 Series Router systems:
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The following chassis are supported for an existing installed base:
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Firmware Support
Minimum and Preferred Cisco IOS Image and Boot Helper Levels for Migration
If you are migrating from Cisco IOS to Cisco IOS XR software on the Cisco XR 12000 Series Router, you must have the following minimum Cisco IOS image level and Boot Helper version to support Release 3.8.4:
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However, the recommended Cisco IOS image level to support migration to Release 3.8.4 can be either one of the following:
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If you have an earlier version of this system, you must upgrade to at least the minimum supported level before performing a migration. Otherwise, your migration may fail.
For more information, see the Migrating from Cisco IOS to Cisco IOS XR Software on the Cisco XR 12000 Series Router document.
Table 8 lists the recommended firmware level for Cisco IOS 12.0(32)SY5 when migrating to Cisco IOS XR Software Release 3.8.4.
Minimum Firmware Requirement
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Depending on the type of firmware that needs upgrading the symptoms can vary as follows:
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RMA Card Firmware Upgrade Procedure:
To upgrade the fabric-downloader, ROMMON, Mbus, and current field-programmable device (FPD) image package on a single RMA linecard or on all modules installed in a router, use the upgrade all command in administration EXEC mode.
upgrade all location {node-id | all} [force]
Where location node-id specifies that all all firmware images (ROM, MBUS, Fabric Downloader and FPD) will be upgraded on the physical location of the line card received through RMA defined by the node-id argument. The node-id argument is entered in the rack/slot/module notation.
The upgrade all location all command upgrades all all firmware images (ROM, MBUS, Fabric Downloader and FPD) on all line cards (LCs) that are installed in the router.
For an RMA linecard firmware upgrade you'll want to use the upgrade all location node-id command.
The optional force parameter skips the version check and forces an upgrade.
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http://www.cisco.com/web/Cisco_IOS_XR_Software/pdf/XR12000SoftwareFirmwareCompatibilityMatrix.pdf
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http://www.cisco.com/web/Cisco_IOS_XR_Software/index.html
Here's the link to the Cisco Systems IOS XR Firmware Upgrade Guide For CRS-1 and XR12000:
http://www.cisco.com/web/Cisco_IOS_XR_Software/pdf/IOSXRFirmwareUpgradeGuide.pdf
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http://www.cisco.com/en/US/docs/ios_xr_sw/iosxr_r3.8/system_management/command/reference/yr38hw.html
Determining Your Software Version
To determine the version of Cisco IOS XR software running on your router, log into the router and enter the show version command:
Step 1
Step 2
Cisco CRS-1
On the Cisco CRS-1, you should see a response similar to the following (which has been abbreviated for the Release Notes):
RP/0/RP0/CPU0:router# show versionRP/0/RP1/CPU0:ben10#show versionCisco IOS XR Software, Version 3.8.4[00]Copyright (c) 2010 by Cisco Systems, Inc.ROM: System Bootstrap, Version 1.54(20091016:214209) [CRS-1 ROMMON],ben10 uptime is 2 days, 15 hours, 20 minutesSystem image file is "bootflash:disk0/hfr-os-mbi-3.8.4/mbihfr-rp.vm"cisco CRS-8/S (7457) processor with 4194304K bytes of memory.7457 processor at 1197Mhz, Revision 1.22 Management Ethernet14 TenGigE12 WANPHY controller(s)37 GigabitEthernetCisco XR 12000 Series Router
On the Cisco XR 12000 Series Router, you should see a response similar to the following (which has been abbreviated for the Release Notes):
RP/0/0/CPU0:PE6_C12406# show versionRP/0/7/CPU0:P2_UUT#sh verMon Apr 26 20:25:39.987 PSTCisco IOS XR Software, Version 3.8.4[00]Copyright (c) 2010 by Cisco Systems, Inc.ROM: System Bootstrap, Version 12.0(20090226:235859) [rtauro-sw30346-33S 1.23dev(0.35)] DEVELOPMENT SOFTWARECopyright (c) 1994-2009 by cisco Systems, Inc.P2_UUT uptime is 21 hours, 33 minutesSystem image file is "disk0:c12k-os-mbi-3.8.4/mbiprp-rp.vm"cisco 12416/PRP (7457) processor with 3670016K bytes of memory.7457 processor at 1266Mhz, Revision 1.22 Cisco 12000 4 Port Gigabit Ethernet Controllers (8 GigabitEthernet)3 Cisco 12000 Series SPA Interface Processor-601/501/4012 Cisco 12000 Series Performance Route Processors1 Cisco 12000 4-Port ISE ATM Over SONET OC3/STM-1 Controller (4 ATM)1 Cisco 12000 4-Port ISE ATM Over SONET OC12/STM-4 Controller (4 ATM)1 1 Port ISE Packet Over SONET OC-48c/STM-16 Controller (1 POS)6 Management Ethernet14 PLIM_QOS2 TenGigE11 SONET/SDH3 Packet over SONET/SDH18 GigabitEthernet/IEEE 802.3 interface(s)8 FastEthernet2 T310 Asynchronous Transfer Mode1017k bytes of non-volatile configuration memory.57119M bytes of hard disk.2053376k bytes of disk0: (Sector size 512 bytes).65536k bytes of Flash internal SIMM (Sector size 256k).
New Software Features in Cisco IOS XR Software Release 3.8.4
The following sections contain information on new features and enhancements in Cisco IOS XR Software Release 3.8.4:
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New Software Features Supported on All Platforms
The following new software feature in Cisco IOS XR Software Release 3.8.4 is supported on both the Cisco CRS-1 and the Cisco XR 12000 Series Router:
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Staggered Adjacency
This section contains the adjacency stagger command that is supported in Cisco IOS XR Software Release 3.8.4. This command is supported on the Cisco CRS-1 and the Cisco XR 12000 Series Router.
adjacency stagger
To configure staggering of OSPF adjacency during reload, process restart, and process clear, use the adjacency stagger command in router configuration mode. To turn off adjacency staggering, either use the disable keyword or use the no form of this command.
adjacency stagger {disable | initial-num-nbr max-num-nbr}
no adjacency stagger
Syntax Description
Command Default
OSPF adjacency staggering is enabled.
Command Modes
Router configuration
Command History
Release 3.8.4
This command was introduced on the Cisco CRS-1 and Cisco XR 12000 Series Router.
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator. For detailed information about user groups and task IDs, refer to the Configuring AAA Services on Cisco IOS-XR Software module of the Cisco IOS-XR System Security Configuration Guide.
Staggering of the OSPF adjacency during a reload, process restart (without NSR or graceful-restart), and process clear reduces the overall adjacency convergence time.
Initially, allow two (configurable) neighbors to form adjacency to FULL per area. After the first adjacency reaches FULL, up to 64 (configurable) neighbors can form adjacency simultaneously for the OSPF instance (all areas). However, areas without any FULL adjacency are restricted by the initial area limit.
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Task ID
Examples
The following example shows how to configure adjacency stagger for two neighbors initially and for a maximum of three neighbors:
RP/0/RP0/CPU0:router# configureRP/0/RP0/CPU0:router(config)# router ospf 1RP/0/RP0/CPU0:router(config-ospf)# adjacency stagger 2 3RP/0/RP0/CPU0:router(config-ospf) commitRP/0/RP0/CPU0:router(config) endRSVP as a percentage of Interface BW
For information about changes to the interface bandwidth percentage, refer to the Cisco IOS XR MPLS Release 3.8 docs:
Cisco IOS XR MPLS Command Reference, Release 3.8:
http://www.cisco.com/en/US/docs/ios_xr_sw/iosxr_r3.8/mpls/command/reference/gr38.html
Cisco IOS XR MPLS Configuration Guide, Release 3.8:
http://www.cisco.com/en/US/docs/ios_xr_sw/iosxr_r3.8/mpls/configuration/guide/gc38.html
TE Auto-BW underflow
For information about changes to the TE Auto BW underflow command, refer to the Cisco IOS XR MPLS Release 3.8 docs:
Cisco IOS XR MPLS Command Reference, Release 3.8:
http://www.cisco.com/en/US/docs/ios_xr_sw/iosxr_r3.8/mpls/command/reference/gr38.html
Cisco IOS XR MPLS Configuration Guide, Release 3.8:
http://www.cisco.com/en/US/docs/ios_xr_sw/iosxr_r3.8/mpls/configuration/guide/gc38.html
eBGP Multihop with Labeled Unicast
The IPv4 labeled unicast address family is supported for both directly connected and non-directly connected BGP sessions.
For more information, about BGP, refer to the Cisco IOS XR Routing Configuration Guide, Release 3.8 at
http://www.cisco.com/en/US/docs/ios_xr_sw/iosxr_r3.8/routing/configuration/guide/rc38.html
Enhanced Process Distribution to Improve Load-Balancing Across Cisco CRS-1 RPs
The default Cisco IOS XR process placement policy has changed to improve the distribution of processing load across active Cisco CRS-1 route processors (RPs). These changes affect systems with more than one active RP, such as Cisco CRS-1 Multichassis systems and Cisco CRS-1 Single-Chassis systems with optional, distributed route processors (DRPs) installed.
Highlights of the New Process Distribution Feature
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If a single active non-dLRSC RP pair exists, the IPv4 and IPv6 groups will be placed on that pair.
If more than one active non-dLRSC RP pair exists, the IPv4 group will be placed on one such pair and the IPv6 group on another. The placement of each group occurs when that group starts.
If no non-dLRSC pairs exist, but an unpaired active non-dLRSC RP does, then, the first placeable group to start (IPv4/MPLS or IPv6) will be placed on the dLRSC, with the other group being placed on the non-dLRSC RP pair.
Information About How Process Placement Works
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LDP Forward Port
For information about the LDP IGP Sync Process Restart Delay command, refer to the Cisco IOS XR Routing Configuration Guide, Release 3.8 at
http://www.cisco.com/en/US/docs/ios_xr_sw/iosxr_r3.8/routing/configuration/guide/rc38.html
Cisco CRS-1 Router-Specific Software Features
The following Cisco CRS-1 platform-specific features are new in Cisco IOS XR Software Release 3.8.4:
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Automatic Fabric Plane Disabling
In a multi-chassis CRS, the fabric components are in different racks and are physically interconnected by optical cables. If any one of the fabric components fails, the fabric plane also fails but does not automatically go out of service. Therefore, the faulty plane still operates.
In Cisco IOS XR Software Release 3.8.4 you can configure the minimum number of working fabric planes by using the new controllers fabric capacity threshold command. By configuring this threshold, you enable the faulty fabric planes to be automatically taken out of service.
For example, if you configure the threshold for 7 working planes, then only one faulty plane can be taken out of service.
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controllers fabric capacity threshold
To set the minimum number of fabric planes that must be in service for the multichassis system to be operational, use the controllers fabric capacity threshold command in administration configuration mode.
controllers fabric capacity threshold threshold
Syntax Description
Command Modes
Administration configuration
Command History
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator. For detailed information about user groups and task IDs, refer to the Configuring AAA Services on Cisco IOS-XR Software module of the Cisco IOS-XR System Security Configuration Guide.
Task ID
Examples
The following example shows how to set the number of fabric planes that must be operational to 7 which indicates that only 1 faulty fabric plane can be taken out of service.
RP/0/RP0/CPU0:router# adminRP/0/RP0/CPU0:router(admin-config)#controllers fabric capacity threshold 7RP/0/RP0/CPU0:router(admin-config) commitRP/0/RP0/CPU0:router(admin-config)e ndBundle Fast Convergence
Cisco IOS XR Software Release 3.8.4 adds support for bundle fast convergence. This feature provides a quicker recovery time for protected TE tunnels over bundle interfaces.
PBTS Default Behavior Change
For information about the changes to the Policy-based Tunnel Selection (PBTS) defaults, refer to the Cisco IOS XR MPLS Release 3.8 docs:
Cisco IOS XR MPLS Command Reference, Release 3.8:
http://www.cisco.com/en/US/docs/ios_xr_sw/iosxr_r3.8/mpls/command/reference/gr38.html
Cisco IOS XR MPLS Configuration Guide, Release 3.8:
http://www.cisco.com/en/US/docs/ios_xr_sw/iosxr_r3.8/mpls/configuration/guide/gc38.html
Cisco IOS XR Software Release 3.8.4 includes support for prefix-length notation for ACLs on the Cisco CRS-1 platform.
The following example shows how to define an access list named Internetfilter with prefix-length notation:
RP/0/RSP0/CPU0:router(config)# ipv4 access-list Internetfilter10 permit ipv4 12.10.10.1/24 any20 permit ipv4 125.10.10.1/16 any30 permit ipv4 135.10.10.1/27 any40 permit ipv4 135.200.10.1/24 any50 permit ipv4 any anyCisco XR 12000 Series Router-Specific Software Features
No new Cisco XR 12000 Series Router platform-specific features were added in Cisco IOS XR Software Release 3.8.4.
New Hardware Features for Cisco IOS XR Software Release 3.8.4
The following new hardware features were introduced in Cisco IOS XR Software Release 3.8.4:
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Cisco CRS-1 Router-Specific Hardware Features
The following new features in Cisco IOS XR Software Release 3.8.4 are supported on the Cisco CRS-1 platform:
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CRS-FP40 Licenses
The following licenses apply to the CRS-FP40 on a per slot basis:
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For GRE and L2TPv3, this license applies to the line card required to enable GRE and/or L2TPv3 encapsulation.
Restrictions
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QoS Restrictions
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Table 9 Chassis and Line Card Compatibility Matrix
Multichassis, CRS-16/S
4 port 10GE LAN (4-10GE)
42-1GE
20-1GE-FLEX
2-10 GE-WL-FLEX
All existing CRS-1 PLIM/SIP800CRS-MSC-40G-B
CRS-8/S, CRS-4/S
4 port 10GE LAN (4-10GE)
42-1GE
20-1GE-FLEX
2-10 GE-WL-FLECRS-FP401 or CRS-MSC-40G-B
All existing CRS-1 PLIM/SIP800
CRS-MSC-40G-B
1 CRS-FP40 is supported only in 4/8 slot chassis and can be only paired with new PLIMs. New PLIMs can be paired with the CRS-FP40 and CRS-MSC-40G-B.
Table 10 SPA Support for FLEX PLIMs
20-1GE-FLEX
2-10 GE-WL-FLEXPOS
SPA-4XOC3-POS
SPA-8XOC12-POS (Multi-rate1 )
SPA-2XOC48POS/RPR
SPA-4XOC48POS/RPR
SPA-OC192POS-VSR
SPA-OC192POS-XFP
Ethernet
SPA-1X10GE-L-V2
SPA-1X10GE-WL-V2
SPA-10X1GE-V2
SPA-8X1GE
SPA-8X1GE-V2
SPA-5X1GE-V2
1 Multi-rate: SPA-8XOC12-POS can support SFP-OC12-x and SFP-OC3-x.
Cisco XR 12000 Series Router-Specific Hardware Features
The following new features in Cisco IOS XR Software Release 3.8.4 are supported on the Cisco XR 12000 Series Router platform:
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Important Notes
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pw-class class1 encapsulation mpls control-word•
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Configuration prior to Cisco IOS XR Software Release 3.6.0:
Policy-map wred_exampleClass class-defaultrandom-detect exp 0 384 packets 484 packetsrandom-detect exp 1 384 packets 484 packetsrandom-detect exp 2 384 packets 484 packetsrandom-detect exp 3 484 packets 584 packetsrandom-detect exp 4 484 packets 584 packetsrandom-detect discard-class 0 384 packets 484 packetsrandom-detect discard-class 1 384 packets 484 packetsrandom-detect discard-class 2 484 packets 584 packetsbandwidth remaining percent 20!!Cisco IOS XR Software Release 3.6.0 and later releases:
policy-map wred_exampleclass class-defaultrandom-detect exp 0,1,2 384 packets 484 packetsrandom-detect exp 3,4 484 packets 584 packetsrandom-detect discard-class 0,1 384 packets 484 packetsrandom-detect discard-class 2 484 packets 584 packetsbandwidth remaining percent 20!end-policy-map!endIn Cisco IOS XR Software Release 3.6.0 and later releases, the implicitly assigned QoS class class-default must have at least 1 percent bandwidth made available to it. This can be done either by assigning at least 1 percent explicitly (bandwidth remaining percent 1) or by ensuring that the total bandwidth assigned to all other classes in the policy is a maximum of 99 percent, leaving 1 percent available for the class-default. A QoS policy that does not have any bandwidth for class-default is rejected when upgrading to Cisco IOS XR Software Release 3.6.0 or later releases.
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RP/0/0/CPU0:router# adminRP/0/0/CPU0:router# show environment power-supply table48V CurrentR/S/I Module (V) (A)0/24/* PEM1 54 4PEM2 53 40/25/* PEM1 54 4PEM2 53 4Total Power Supplies: 3200WRedundant Power Supplies: 1600WWorst Case Power Used: 621WCurrent Power Used: 428WCurrent Redundant Power Available: 1172WCurrent Total Power Available: 2772WWorst Case Redundant Power Available: 979WWorst Case Total Power Available: 2579WPID Description Watts--- ----------- -----GRP-B Route Processor 38PRP-1 Cisco 12000 Series Performance Route Processor 60LC-4OC-3-POS-SM 4 Port Packet Over SONET OC-3c/STM-1 804OC3X/POS-MM-MJ-B 4 port ISE OC3 90If you plan to insert a new card, locate the entry for the card to be inserted and note the power consumed by it. If this power is less than the figure given in Worst Case Redundant Power Available (the figure is displayed in the show environment power-supply table command output), the card can be safely inserted. As long as the Worst Case Redundant Power Available is not zero, a PEM can be powered down for replacement without impact.
Note
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show l2tp session sequence
show l2vpn forwarding detail - This command does not show the sequence number for L2VPNs.
show l2tp session detail - The sequence numbers are not displayed.
clear l2vpn forwarding table
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show controllers atm <> traffic vc <>—This command prints the CID.
show hw-module subslot <> memory sar cid <>—Use the CID obtained in the previous command.
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Due to this change, when downgrading from Cisco IOS XR Release 3.8.4 to earlier releases, the multicast-routing and router pim MVPN (VRF) configurations are rejected. This failure is shown in the output of the show configuration failed startup command.
Multicast-routing and router pim MVPN (VRF) configurations need to be corrected and reapplied manually. Since a downgrade is typically done following an upgrade, save a copy of the older-release running-configuration before doing the upgrade.
In Cisco IOS XR Release 3.8.4, the following multicast routing configurations are on separate lines:
multicast-routingvrf vrf1address-family ipv4interface all enable!!!To correct the multicast-routing configurations, the vrf <> and address-family <> lines should be combined into the same line as shown in the following example:
multicast-routingvrf vrf1 address-family ipv4interface all enable!In Cisco IOS XR Release 3.8.4, the following router PIM configurations are on separate lines:
router pimvrf vrf1address-family ipv4interface Loopback0!!!To correct the router pim configurations, the vrf <> and address-family <> lines should be combined into the same line as the router pim shown in the following example:
router pim vrf vrf1 address-family ipv4interface Loopback0!!•
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LDP session hold time <= (Hello hold time - Hello interval) * 3
This means that for default values of 15/5 seconds respectively for the link Hello hold time and the Hello interval, the LDP session hold time should be set to 30 seconds or less.
For more information, refer to the "Implementing MPLS Label Distribution Protocol on Cisco IOS XR Software" section of the Cisco IOS XR MPLS Configuration Guide, Release 3.8.4.
Minimum Flash Disk Requirements When Upgrading to Release 3.8.4
Cisco IOS XR Software Release 3.8.4 requires a 2-GB flash disk as a minimum, so if your Cisco CRS-1 or Cisco XR 12000 Series Router currently uses a 1-GB flash disk, you must upgrade it to 2-GB before upgrading to Cisco IOS XR Software Release 3.8.4.
The PCMCIA 1-GB flash disk was the default size for the Cisco CRS-1 running Cisco IOS XR Software Release 3.6 and earlier and for the Cisco XR 12000 Series Router running Cisco IOS XR Software Release 3.5 and earlier.
A 4-GB flash disk is available for both platforms and can be installed instead of the 2-GB for greater disk storage for Cisco IOS XR Software Release 3.4 and later.
To upgrade from a 1-GB flash disk to a 2-GB or greater flash disk, refer to the Cisco XR12000 and CRS-1 Flash Disk Upgrade Tasks document at: http://www.cisco.com/en/US/docs/routers/xr12000/xr_line_cards/flashdisk/flashdisk.pdf
Additional upgrade instructions for the Cisco CRS-1 router are available from: http://www.cisco.com/web/Cisco_IOS_XR_Software/pdf/ReplacingPCMCIACardOnCRS-1.pdf
Caveats
Caveats describe unexpected behavior in Cisco IOS XR software releases. Severity-1 caveats are the most serious.
The following caveats are open for Cisco IOS XR Software Release 3.8.4 on the router platforms indicated:
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Cisco IOS XR Caveats
The following caveats apply to both platforms:
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Basic Description:
Processes terminated due to "did not signal end of initialization."
Symptom:
Multiple processes get abnormally terminated during a Cisco CRS-1 router reload. These processes may include ifindex_server, ipv4_io, ipv4_acl, ipv6_acl_daemon, ipv4_ma, ipv6_ma, ipv4_mfwd_partner, ipv6_mfwd_partner and intf_mgbl. For these processes, the console log reports: ''sysdb' detected the 'try again' condition 'Couldn't create connection to SysDB or an EDM.''
Conditions:
This issue is caused by a rare timing condition during a system reload.
Workaround:
None.
Recovery:
Automatically, the processes get respawned. If any configuration errors are reported, reapply the configuration.
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Basic Description:
Banner configuration ends up in configuration failed startup after upgrade.
Symptom:
Startup configurations, related to banner, fail during the upgrade scenario.
Conditions:
This issue may occur on rare occasions after upgrading to Cisco IOS XR Software Release 3.8.4.
Workaround:
None.
Recovery:
Reapply the banner configuration manually.
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Basic Description:
ATM SPA errors after VPI reuse in scaled configuration.
Symptom:
SPA related errors generally accompanied by channel statistics error.
Conditions:
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Under such a sequence of actions, there is a possibility that one of the VP teardowns does not go through cleanly, leaving behind stale cChannel of the VP. If a subsequent VC is created with the same VPI value, it might sometimes result in a traffic outage on that particular L2-VC. When the problem occurs, the show hw-module subslot <> counter sar indicates a CID for VCD mapped to the L2-VP which was deleted indicating that it is stale.
Workaround:
Avoid using an L2-VC with the same VPI value as was the VPI of the previously configured VP on the same port. If the VPI has been re-used and the traffic does not pass over the newly configured L2 connection, change the VPI value to have a different allocated CID.
Recovery:
Reload the SPA to recover from this issue.
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Basic Description:
Cisco CRS-1 line card may exhibit dropping of traffic flows through the card.
Symptom:
Configuration-based applications:
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Forwarding or learning applications:
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On rare occasions, the order in which configuration and forwarding updates are produced and processed can trigger a mismatch between the control plane view of TCAM content and the actual content in the TCAM hardware.
When there is a mismatch, the outcome of TCAM lookups becomes undetermined, leading to undefined behavior in packet forwarding by the Metro.
The net effect of this mismatch can manifest itself in many different ways, including any or all of the following:
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Conditions:
This problem has a very low rate of incidence; only two incidents in the past 12 months are known to be related to this condition. This problem may occur on any line card where combinations of TCAM applications incur a high incidence of TCAM updates.
Workaround:
None.
Recovery:
When this condition occurs, it can sometimes correct itself. This occurs only if the TCAM entries that are mismatched receive additional updates that trigger the reprogramming of those entries into the TCAM. If the entries do not correct themselves, the line card needs to be reloaded.
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Basic Description:
Not able to modify RPL and delete prefix-set in a single commit.
Symptom:
When a policy that is attached directly or indirectly to an attach point needs to be modified, a single commit operation cannot be performed when:
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Workaround:
The commit must be performed in two steps:
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Caveats Specific to the Cisco CRS-1 Router
The following caveats are specific to the Cisco CRS-1 platform:
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Basic Description:
Unable to reapply a failed startup configuration after router reload.
Symptom:
Startup configuration cannot be reapplied following a router reload.
Example:
RP/0/RP0/CPU0:router(config)#load configuration failed startupLoading. 527 bytes parsed in 1 sec (524)bytes/secRP/0/RP0/CPU0:router(config)#commit% Failed to commit one or more configuration items during a pseudo- atomic operation. All changes made have been reverted. Please issue 'show configuration failed' from this session to view the errorsRP/0/RP0/CPU0:router(config)#show configuration failedWed Mar 31 15:18:52.846 UTC!! SEMANTIC ERRORS: This configuration was rejected by!! the system due to semantic errors. The individual!! errors with each failed configuration command can be!!found below.Conditions:
This issue is caused by a rare timing condition following a system reload that causes the sysdb_svr_shared and sysdb_svr_admin processes to go out-of-sync with the sysdb_mc process.
This can be confirmed by the following steps:
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For example:
RP/0/RP0/CPU0: router#show processes shelfmgrJID TID CPU Stack pri state TimeInState HR:MM:SS:MSEC NAME349 1 1 104K 10 Receive 0:00:02:0037 0:00:57:0275 shelfmgr349 2 1 104K 10 Receive 0:00:04:0777 0:00:00:0012 shelfmgr2.
For example:
RP/0/RP1/CPU0: router# show sysdb medusa registrations verification location 0/RP0/CP0 | include 349Mar 26 01:14:57.801 00349 0/RP1/CPU0 001 000003 '/admin/cfg/gl/shelfmgr/adminstate/power/'Mar 26 01:14:57.801 00349 0/RP1/CPU0 001 000003 '/admin/cfg/gl/shelfmgr/adminstate/shutdown/'Mar 26 01:14:57.801 00349 0/RP1/CPU0 001 000003 '/admin/cfg/gl/shelfmgr/adminstate/monitor/'Mar 26 01:14:57.801 00349 0/RP1/CPU0 001 000003 '/admin/cfg/gl/shelfmgr/adminstate/reset'Mar 26 01:14:57.801 00349 0/RP1/CPU0 001 000003 '/admin/cfg/gl/shelfmgr/adminstate/boot/'3.
For example:
RP/0/RP1/CPU0:router# adminMon Apr 5 18:38:52.611 UTCRP/0/RP1/CPU0:router(admin)#show sysdb registrations verification job 349Mon Apr 5 18:39:03.072 UTCSysDB Verification Registrations:Time: jid: nid: tid: handle: reg_path:Mar 26 01:14:57.800 00349 0/RP1/CPU0 001 000001 `/admin/cfg/gl/shelfmgr/adminstate/boot/'Mar 26 01:14:57.800 00349 0/RP1/CPU0 001 000001 '/admin/cfg/gl/shelfmgr/adminstate/reset'Mar 26 01:14:57.800 00349 0/RP1/CPU0 001 000001 '/admin/cfg/gl/shelfmgr/adminstate/power/'4.
Workaround:
None.
Recovery:
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Basic Description:
TACACS authentication fails when mismatched server key is configured.
Symptom:
Authentication failures occur with TACACS+ when a mismatched server key is configured on the router for the primary server.
Conditions:
This condition occurs when you configure the wrong key for the first server (primary server) on the router but configure the correct key for the second server and try to login to the router with a username configured only on TACACS servers.
Workaround:
If a local user is configured and authentication is set to have local as the backup authentication method, that login succeeds. Configure the correct server key.
Recovery:
If no local user is configured and you are unable to match the router key on the TACACS+ server side, you must proceed with password recovery. Please contact technical support for further assistance.
Caveats Specific to the Cisco XR 12000 Series Router
Cisco IOS XR Software Release 3.8.4 does not include any Cisco XR 12000 Series Router caveats.
Resolved Cisco IOS XR Software PSIRT-Related Caveats
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Basic Description:
BGP flaps due to unknown attribute
Symptom:
Cisco IOS XR Software contains a vulnerability in the Border Gateway Protocol (BGP) feature. The vulnerability manifests itself when a BGP peer announces a prefix with a specific, valid but unrecognized transitive attribute. On receipt of this prefix, the Cisco IOS XR device will corrupt the attribute before sending it to the neighboring devices. Neighboring devices that receive this corrupted update may reset the BGP peering session.
Conditions:
Affected devices running Cisco IOS XR Software corrupt the unrecognized attribute before sending to neighboring devices, but neighboring devices may be running operating systems other than Cisco IOS XR Software and may still reset the BGP peering session after receiving the corrupted update. This is per standards defining the operation of BGP.
Workaround:
No workaround. Cisco developed a fix that addresses this vulnerability and will be releasing free software maintenance upgrades (SMUs) progressively starting 28 August 2010.
A Security Advisory is posted at http://www.cisco.com/warp/public/707/cisco-sa-20100827-bgp.shtml
Upgrading Cisco IOS XR Software
Cisco IOS XR software is installed and activated from modular packages, allowing specific features or software patches to be installed, upgraded, or downgraded without affecting unrelated processes. Software packages can be upgraded or downgraded on all supported card types, or on a single card (node).
Software packages are installed from package installation envelope (PIE) files that contain one or more software components.
The following URL contains links to information about how to upgrade Cisco IOS XR software:
http://www.cisco.com/web/Cisco_IOS_XR_Software/index.html
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Troubleshooting
For information on troubleshooting Cisco IOS XR software, see Cisco IOS XR Getting Started Guide and Cisco IOS XR Troubleshooting Guide.
Related Documentation
Hardware Documents
You can find the most current hardware documentation at the following URLs:
Cisco CRS-1 Router:
http://www.cisco.com/en/US/products/ps5763/tsd_products_support_series_home.html
Cisco XR 12000 Series Router:
http://www.cisco.com/en/US/products/ps6342/tsd_products_support_series_home.html
Software Documents
The Cisco IOS XR software documentation set includes the Cisco IOS XR software configuration guides and command references, as well as a getting started guide. See About Cisco IOS XR Software Documentation for Release 3.8 for a list of Cisco IOS XR Release 3.8.4 software documentation.
You can find the most current software documentation for the Cisco CRS-1 and Cisco XR 12000 Series Router at the following URL:
http://www.cisco.com/en/US/products/ps5845/tsd_products_support_series_home.html
This document is to be used in conjunction with the documents listed in the "Related Documentation" section.
Obtaining Documentation and Submitting a Service Request
For information on obtaining documentation, submitting a service request, and gathering additional information, see What's New in Cisco Product Documentation at: http://www.cisco.com/en/US/docs/general/whatsnew/whatsnew.html.
Subscribe to What's New in Cisco Product Documentation, which lists all new and revised Cisco technical documentation, as an RSS feed and deliver content directly to your desktop using a reader application. The RSS feeds are a free service.
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)
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