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Table Of Contents
Release Notes for the Cisco 10000 Series ESR
for Cisco IOS Release 12.0(21)SXUpgrading to a New Software Release
Upgrading Cisco IOS Software from Earlier Cisco IOS Releases
New Features in Cisco IOS Release 12.0(21)SX
Cisco 24-Port E1 Line Card Description
Cisco 10000 ESR MIB Enhancements
Cisco 10000 Series ESR Software Features
Controlling the Rate of Logging Messages
Testing Performance of High-Speed Interfaces
Caveats in Cisco IOS Release 12.0(21)SX
Resolved Problems in Cisco IOS Release 12.0(21)SX
Obtaining Technical Assistance
Release Notes for the Cisco 10000 Series ESR
for Cisco IOS Release 12.0(21)SX
February 25, 2002
These release notes provide information about Cisco IOS Release 12.0(21)SX running on the Cisco 10000 series edge services router (ESR). These release notes are updated as needed to describe new features, memory requirements, hardware support, software platform deferrals, and changes to the microcode and related documents.
Cisco IOS Release 12.0(21)SX is based on the following previous releases:
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Cisco IOS Release 12.0(21)ST
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For a list of the software caveats that apply to Cisco IOS Release 12.0(21)SX, see the "Caveats in Cisco IOS Release 12.0(21)SX" section.
Use these release notes in conjunction with the Release Notes for Cisco IOS Release 12.0(S) and the cross-platform Release Notes for Cisco IOS Release 12.0.
To review the release notes for Cisco IOS Release 12.0S, go to www.cisco.com and click Technical Documents. Select Release 12.0 from the Cisco IOS Software drop-down menu. Then click Release Notes > Cisco 12000 Series Routers > Cisco 7000 Family and 12000 Series—Release Notes for Release Cisco IOS 12.0 S.
To review the cross-platform Release Notes for Cisco IOS Release 12.0, go to www.cisco.com and click Technical Documents. Select Release 12.0 from the Cisco IOS Software drop-down menu. Then click Release Notes > Cross-Platform Release Notes.
Contents
This document contains the following sections:
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Upgrading to a New Software Release
Caution
For specific information about upgrading your Cisco 10000 series ESR to a new software release, see the Cisco 10000 Series ESR Software Configuration Guide.
For general information about upgrading to a new software release, see the product bulletin Cisco IOS Upgrade Ordering Instructions located at:
http://www.cisco.com/warp/public/cc/pd/iosw/prodlit/957_pp.htm
For additional information about ordering Cisco IOS software, refer to the Cisco IOS Software Releases URL:
http://www.cisco.com/warp/public/cc/pd/iosw/iore/index.shtml
Upgrading Cisco IOS Software from Earlier Cisco IOS Releases
Caution
Before you upgrade to Cisco IOS Release 12.0(21)SX, save your current configuration file. If you decide to re-install Release 12.0(14)SL, or an earlier release, you must also re-install the configuration file associated with that release. This is because some BGP configuration-file entries in Release 12.0(21)SX are not compatible with Release 12.0(14)SL or earlier releases.
System Requirements
For Cisco IOS Release 12.0(21)SX to run properly on the Cisco 10000 series ESR, the Performance Routing Engine (PRE) installed in the chassis must be the PRE1 version (Part Number ESR-PRE1). To verify the currently installed PRE in the chassis, invoke the show version command.
New Features in Cisco IOS Release 12.0(21)SX
This section lists new features and improvements that are supported in Cisco IOS Release 12.0(21)SX.
Cisco 24-Port E1 Line Card Description
The Cisco 24-port E1 line card is a full-slot line card with 24 ports which you can configure as E1 interfaces. Each port on the line card provides one or more interfaces that can be configured as framed (channelized) or unframed (unchannelized) interfaces.
The following E1 features are supported on the Cisco 24-port E1 line card:
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Cisco 10000 ESR MIB Enhancements
MIB enhancements in Cisco IOS Release 12.0(21)SX provide enhanced management features that enable the router to be managed through the Simple Network Management Protocol (SNMP). These enhanced management features allow you to:
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Other benefits include:
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Cisco 10000 Series ESR Software Features
Table 1 lists the features supported in the Cisco 10000 series ESR.
Limitations and Restrictions
This section describes any limitations and restrictions that you should review before you use the Cisco 10000 series ESR.
MIB Support
The MIBs described in the Cisco 10000 Series ESR MIB Specifications Guide have all been approved. If a MIB is revised in a later Cisco IOS release and new functionality is added, the Cisco 10000 series ESR might not support the new functionality; however, the previous MIB functionality always remains intact on the router.
Controlling the Rate of Logging Messages
It is important that you limit the rate that system messages are logged by the Cisco 10000 series ESR. This avoids a situation in which the router becomes unstable and the CPU is overloaded. Use the logging rate-limit command to control the output of messages from the system.
We recommend that you configure the logging rate-limit command as follows:
Router(config)# logging rate-limit console all 10 except criticalThis command limits the rate of messages to the console to 10 per second, except for messages with critical priority (level 3) or greater.
For more information on the logging rate-limit command, see the Cisco IOS Configuration Fundamentals Command Reference.
Testing Performance of High-Speed Interfaces
The Cisco 10000 series ESR has multiple queues for all classes of traffic over high-speed interfaces. The software selects a queue based on the source and destination address for the packet. This ensures that a traffic flow always uses the same queue and the packets are transmitted in order.
When the Cisco 10000 series ESR is installed in a real network, the high-speed interfaces work efficiently to spread traffic flows equally over the queues. However, using single traffic streams in a laboratory environment may result in less-than-expected performance.
Therefore, to ensure accurate test results, you should test the throughput of the gigabit Ethernet, POS, or ATM uplink with multiple source or destination addresses.
Tip
Important Notes
This section contains important issues that you should be aware of with Cisco IOS Release 12.0(21)SX and previous releases.
Frame Relay and PPP Sessions
You can run up to 4200 Frame Relay sessions or 1300 PPP sessions, and you can configure up to 800 BGP peers on the Cisco 10000 series ESR. The router also supports up to 512 Multilink Point-to-Point (MLP) protocol sessions.
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Cisco Discovery Protocol
Unlike other Cisco routers, the Cisco Discovery Protocol (CDP) on the Cisco 10000 series ESR is disabled by default. You can enable CDP on an interface using the cdp enable command.
Caveats in Cisco IOS Release 12.0(21)SX
Table 2 lists the open caveats in Cisco IOS Release 12.0(21)SX.
Resolved Problems in Cisco IOS Release 12.0(21)SX
This section lists problems that are fixed in Cisco IOS Release 12.0(21)SX.
CSCdw65903
An error can occur with management protocol processing. For more information, go to the following URL:
http://www.cisco.com/cgi-bin/bugtool/onebug.pl?bugid=CSCdw65903
Obtaining Documentation
The following sections provide sources for obtaining documentation from Cisco Systems.
World Wide Web
You can access the most current Cisco documentation on the World Wide Web at the following sites:
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Documentation CD-ROM
Cisco documentation and additional literature are available in a CD-ROM package, which ships with your product. The Documentation CD-ROM is updated monthly and may be more current than printed documentation. The CD-ROM package is available as a single unit or as an annual subscription.
Ordering Documentation
Cisco documentation is available in the following ways:
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http://www.cisco.com/cgi-bin/order/order_root.pl
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http://www.cisco.com/go/subscription
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Documentation Feedback
If you are reading Cisco product documentation on the World Wide Web, you can submit technical comments electronically. Click Feedback in the toolbar and select Documentation. After you complete the form, click Submit to send it to Cisco.
You can e-mail your comments to bug-doc@cisco.com.
To submit your comments by mail, use the response card behind the front cover of your document, or write to the following address:
Attn. Document Resource Connection
Cisco Systems, Inc.
170 West Tasman Drive
San Jose, CA 95134-9883We appreciate your comments.
Obtaining Technical Assistance
Cisco provides Cisco.com as a starting point for all technical assistance. Customers and partners can obtain documentation, troubleshooting tips, and sample configurations from online tools. For Cisco.com registered users, additional troubleshooting tools are available from the TAC website.
Cisco.com
Cisco.com is the foundation of a suite of interactive, networked services that provides immediate, open access to Cisco information and resources at anytime, from anywhere in the world. This highly integrated Internet application is a powerful, easy-to-use tool for doing business with Cisco.
Cisco.com provides a broad range of features and services to help customers and partners streamline business processes and improve productivity. Through Cisco.com, you can find information about Cisco and our networking solutions, services, and programs. In addition, you can resolve technical issues with online technical support, download and test software packages, and order Cisco learning materials and merchandise. Valuable online skill assessment, training, and certification programs are also available.
Customers and partners can self-register on Cisco.com to obtain additional personalized information and services. Registered users can order products, check on the status of an order, access technical support, and view benefits specific to their relationships with Cisco.
To access Cisco.com, go to the following website:
http://www.cisco.com
Technical Assistance Center
The Cisco TAC website is available to all customers who need technical assistance with a Cisco product or technology that is under warranty or covered by a maintenance contract.
Contacting TAC by Using the Cisco TAC Website
If you have a priority level 3 (P3) or priority level 4 (P4) problem, contact TAC by going to the TAC website:
http://www.cisco.com/tac
P3 and P4 level problems are defined as follows:
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In each of the above cases, use the Cisco TAC website to quickly find answers to your questions.
To register for Cisco.com, go to the following website:
http://www.cisco.com/register/
If you cannot resolve your technical issue by using the TAC online resources, Cisco.com registered users can open a case online by using the TAC Case Open tool at the following website:
http://www.cisco.com/tac/caseopen
Contacting TAC by Telephone
If you have a priority level 1 (P1) or priority level 2 (P2) problem, contact TAC by telephone and immediately open a case. To obtain a directory of toll-free numbers for your country, go to the following website:
http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml
P1 and P2 level problems are defined as follows:
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