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Table Of Contents
Release Notes for the Cisco 10000 Series ESR
for Cisco IOS Release 12.2(2)BY3Upgrading to a New Software Release
New Features in Cisco IOS Release 12.2(2)BY3
New Features in Cisco IOS Release 12.2(2)BY1
Cisco 10000 Series ESR Software Features
Features Removed to Enable Broadband Aggregation
Applying ACLs to Virtual Access Interfaces
Controlling the Rate of Logging Messages
Testing Performance of High-Speed Interfaces
AAA Authentication on the NME Port
Virtual Templates and PPP Session Scaling
Resolved Caveats in Cisco IOS Release 12.2(2)BY3
Resolved Caveats in Cisco IOS Release 12.2(2)BY2
Caveats in Cisco IOS Release 12.2(2)BY1
Obtaining Technical Assistance
Contacting TAC by Using the Cisco TAC Website
Release Notes for the Cisco 10000 Series ESR
for Cisco IOS Release 12.2(2)BY3
April 1, 2002
These release notes provide information about Cisco IOS Release 12.2(2)BY3, which provides broadband aggregation features for the Cisco 10000 series edge services router (ESR). These release were updated to include fixes for caveats discovered and resolved since the release of Cisco IOS Release 12.2(2)BY2 (see the "Resolved Caveats in Cisco IOS Release 12.2(2)BY3" section).
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 12.2(2)BY3 is based on the following releases:
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Cisco IOS Release 12.2(2)BY2
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For a list of the software caveats that apply to Cisco IOS Release 12.2(2)BY1, see the "Caveats in Cisco IOS Release 12.2(2)BY1" section.
To review the release notes for Cisco IOS Release 12.0(19SL, go to www.cisco.com and click Technical Documents > Aggregation > Cisco 10000 Series Edge Services Routers > Cisco 10000 Series ESR Release Notes > Release Notes for the Cisco 10000 Series ESR for Cisco IOS Release 12.0(19)SL.
To review the release notes for Cisco IOS Release 12.2, go to www.cisco.com and click Technical Documents. Select Release 12.2 from the Cisco IOS Software drop-down menu. Then click Cisco IOS Release Notes > Cisco IOS Release 12.2.
Contents
This document contains the following sections:
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Upgrading to a New Software Release
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
System Requirements
This broadband aggregation image requires that you have the PRE1 version (part number ESR-PRE1) of the Performance Routing Engine (PRE) installed in the Cisco 10000 series ESR chassis. To verify which PRE is installed in the ESR, use the show version command.
New Features in Cisco IOS Release 12.2(2)BY3
The following new features are included in the Cisco 10000 series ESRCisco IOS Release 12.2(2)BY3:
ARP and PPPoE Discovery Packet Throttling
ARP and PPPoE discovery packet throttling enhances the performance of the Cisco 10000 series ESR by limiting the transmission of ARP and PPPoE discovery packets toward the route processor of the PRE to 4 Mbps.
Call Admission Control
The Call Admission Control feature enables the Cisco 10000 series ESR to reject PPP call setup requests if the use of system resources goes beyond a defined limit. The use of system resources such as CPU utilization and memory is very high when a large number of sessions are trying to come up at the same time (for example, when the system is rebooting or line is flapping).
To configure the limit setting which triggers the router to reject PPP call setup requests, use the call admission limit total-concurrent-charge command as follows:
call admission limit total-concurrent-charge
Where total-concurrent-charge is an integer percent of the system resources in use.
We recommend that you set the call admission limit to 90.
New Features in Cisco IOS Release 12.2(2)BY1
Cisco IOS Release 12.2(2(BY1 brings broadband aggregation to the Cisco 10000 series ESR, and enables the router to emulate an L2TP Network Server (LNS)/home gateway upstream from a DSL access network. In this role, the ESR connects to an L2TP Access Concentrator (LAC), terminates the point-to-point protocol (PPP) layer, and assigns a network layer configuration to the remote client. The ESR then routes or forwards the remote client data to the backbone network.
The following new features and improvements are supported in Cisco IOS Release 12.2(2)BY1 to provide broadband aggregation. If you need more information on configuring these features, see the Cisco IOS Wide-Area Networking Configuration Guide, Release 12.2.
Protocols
In addition to the standard protocols supported by the Cisco 10000 series ESR, this release supports the following protocols for broadband aggregation:
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Scalability
Scalability for broadband aggregation for the Cisco 10000 series ESR includes support for the following:
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AAA and Address Assignment
The following new AAA and address assignment features are supported in this release:
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Accounting, Network Management, and Configuration
New router accounting, management, and configuration features in this release include:
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Cisco 10000 Series ESR Software Features
Table 1 lists the leased line features based on Cisco IOS Release 12.0(19)SL, and 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.
Features Removed to Enable Broadband Aggregation
To add broadband aggregation to this release, it was necessary to remove some software features that are standard features in the Cisco 10000 series ESR. The following software features were removed:
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Applying ACLs to Virtual Access Interfaces
In Cisco IOS Release 12.2(2)BY3 and previous releases, if you apply an ACL to a virtual access interface template, the ACL is ignored and has no effect.
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 helps to avoid a situation in which the router becomes unstable and the CPU is overloaded. To control the output of messages from the system, use the logging rate-limit command.
We recommend that you configure the logging rate-limit command as follows:
Router(config)# logging rate-limit console all 10 except criticalThis rate-limits all 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
Cisco IOS software running on 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 proper order.
When the Cisco 10000 series ESR is installed in a real network, the high-speed interfaces work efficiently to spread traffic flow 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 12.2(2)BY3 and previous releases.
High VC Count Mode
The new High VC Count mode enables the Cisco 10000 series ESR to support 32,000 VCs with PPPoE, PPPoA, or RBE protocols. The High VC Count mode is set on a per-port basis, and imposes certain limitations, regardless of how the VCs are defined.
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The following limitations apply in High VC Count mode:
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To set the router to High VC Count mode, use the no atm pxf queuing command.
The following example shows High VC Count mode enabled on an atm port:
Router(config)# interface atm 2/0/3Router(config-if)# no atm pxf queuingProvisioning for Scaling
Cisco engineers have identified several configuration parameters that enable the Cisco 10000 series ESR to scale the configuration. Please ensure that you have the following commands and parameters in your configuration.
RADIUS Authentication
If you plan to run RADIUS authentication, set the small, middle, and big buffers to 15000, 12000, and 8000, respectively. Use the buffers command to do this. For example:
Router(config)# buffers small perm 15000Router(config)# buffers mid perm 12000Router(config)# buffers big perm 8000For typical RADIUS servers, if the RADIUS server is only a few hops away from the router, we recommend that you set the RADIUS server retransmit rate to 5 and the RADIUS server timeout rate to 15 using the radius-server command. For example:
Router(config)# radius-server retransmit 5Router(config)# radius-server timeout 15L2TP Tunnel Settings
It is mandatory that you configure an L2TP tunnel password. To do so, use the l2tp tunnel password command. For example:
Router(config)# vpdn-group tunnel1Router(config-if)# l2tp tunnel password 7The nosession-timeout command determines the length of time a tunnel persists when there are no sessions in it. You must set this timeout to 30. For example:
Router(config)# vpdn-group tunnel1Router(config-if)# l2tp tunnel nosession-timeout 30You must also configure the L2TP tunnel receive window to 100, with the minimum retransmit timeout of 2, and a maximum retransmit timeout of 8. For example:
Router(config)# vpdn-group tunnel1Router(config-if)# l2tp tunnel receive-window 100Router(config-if)# l2tp tunnel retransmit timeout min 2Router(config-if)# l2tp tunnel retransmit timeout max 8If you configure ATM subinterfaces for L2TP tunnels, configure aal5snap encapsulation to avoid a condition where a flapping interface could cause the system to be overloaded with ARP requests. You can do this using the encapsulation command. For example:
Router(config)# interface atm 5/0/0.4Router(config-if-atm-vc)# encaps aal5snapPPP Authentication
To keep the LNS from timing out a PPP authentication process, set the ppp timeout to 100 using the ppp timeout authentication command. For example:
Router(config)# interface Virtual-Template1Router(config-if)# ppp timeout authentication 100Cisco Discovery Protocol
The Cisco Discovery Protocol (CDP) is disabled by default. To maximize scalability in the Cisco 10000 series ESR, do not enable CDP.
Gratuitous ARP Requests
To maximize the performance of the router, you must disable gratuitous ARP requests using the no ip gratuitous-arp command. For example:
Router(config)# no ip gratuitous-arpkeepalive Command
The keepalive command is an interface-specific command. If you configure a virtual-template with any form of the keepalive command, including the no keepalive command, or the keepalive [seconds] command, the subinterfaces are not used with that virtual-template interface.
Trunk Interface Input Queue
To ensure high scalability, set the trunk interface input hold queue to a high value. For example:
Router(config)# int gig1/0/0Router(config-if)# hold-queue 4096 in
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AAA Authentication on the NME Port
If you use AAA authentication on the NME port, set both the in and out interface hold queues to 4096. For example:
Router(config)# int fe 0/1Router(config-if)# hold-queue 4096 inRouter(config-if)# hold-queue 4096 outVirtual Templates and PPP Session Scaling
If you configure a virtual template using interface-specific commands, the Cisco 10000 series ESR does not achieve the highest possible PPP session scaling. To verify that the router has no interface-specific commands within the virtual-template configuration that would limit PPP scaling, use the test virtual-template <number> sub interface command.
In the following example, the output of the test virtual-template <number> sub interface command indicates that subinterfaces cannot be created using the virtual template. Two interface-specific commands are set: carrier-delay and ip rtp priority.
Router(config)# test virtual-template 11 subinterfaceSubinterfaces cannot be created using Virtual-Template11Interface specific commands:carrier-delay 45ip rtp priority 2000 2010 500If you do not use the SNMP management tools of the router to monitor PPP sessions, you can prevent the virtual-access subinterfaces from being registered with the SNMP functionality of the router and using memory by using the no virtual-template snmp command. For example:
Router(config)# no virtual-template snmpTable 2 lists interface-specific commands that prevent the Cisco 10000 series ESR from attaining the highest possible PPP session scaling.
Inserting a New Line Card
Unlike other Cisco routers, if you insert a new or different line card into a Cisco 10000 series ESR chassis slot that previously had a line card installed, the line card initially reports that it is administratively up.
Resolved Caveats in Cisco IOS Release 12.2(2)BY3
This section lists caveats found since the release of Cisco IOS Release 12.2(2)BY2 and are fixed in Cisco IOS Release 12.2(2)BY3.
CSCdv81836
Previously, when RADIUS accounting was configured on an LNS, NAS-Port (radius attribute 5) was not included in the accounting record. This problem has been fixed.
CSCdw18248
In the past, the OC-12 ATM line card reported that the line protocol was up even though the cable was not attached. This problem has been fixed.
CSCdw73883
Previously, if you shut down an OC-12 ATM line card interface that was up, reloaded the Cisco IOS software, and then enabled the interface with the no shutdown command, the interface indicated it was still down. This problem has been fixed.
CSCdw75022
In the past, the ATM interface changed to the shutdown state when you added or changed the parameters of the hold-queues. This problem has been fixed.
CSCdw95551
In the past, if atm pxf queuing mode was configured on the Cisco 10000 series ESR, the pxf queue was full, and the number of drops was increasing, the flowbit process halted. This problem has been fixed.
CSCdw89807
In rare circumstances when the route processor of the PRE was performing a route update, the following error message appeared on the console:
%PXF-2-FAULT: T1 SW Exception: CPU[t1r3c1] 0x00000680 at 0x0D68 LR 0x097300:07:04: %PXF-2-FAULT: T1 Exception summary: CPU[t1r3c1] Stat=0x00000003 HW=0x00000000LB=0x00000000 SW=0x00000680This problem has been fixed.
CSCdw84101
Previously, the PPPoE VLAN RADIUS attribute 5 NAS Port ID contained only the interface number. The VLAN id number was missing. This problem has been fixed.
CSCdw89295
In the past, if you configured a PPPoE session, the following message was entered in the system log:
Access109, changed state to upFeb 16 22:46:36: %LINEPROTO-5-UPDOWN: Line protocol on InterfaceVirtual-Access310, changed state to downFeb 16 22:46:38: %PARSER-4-BADCFG: Unexpected end of configuration file.Feb 16 22:46:38: %LINK-3-UPDOWN: Interface Virtual-Access456, changed state to upThis problem has been fixed.
CSCdw19681
Previously, if there were 4000 or more PVCs running at the line rate, a reassembly interface sometimes stopped working and considered all input traffic as input errors and dropped the input traffic. This problem occurred on the OC-12 and 4-port OC-3 ATM line cards, and has been fixed.
CSCdw59858
In the past, any Cisco router with PPP capabilities crashed after 100 days—regardless of configuration. This problem has been fixed.
CSCdw49797
Previously, the session-timeout attribute was not applied to PPPoA PTA sessions. This problem has been fixed.
CSCdw73956
In the past, the Cisco 10000 series ESR did not update the values for bytes in/out and packets in/out for RADIUS-enabled accounting. This problem has been fixed.
CSCdw22277
Previously, if PPP over Ethernet or PPP over ATM was configured on the Cisco 10000 series ESR, LCP advertised an MRU of 1500 bytes instead of a value equal to the MTU of the relevant virtual template interface. This problem has been fixed.
CSCdw17777
In the past, LNS used 1464 in MRU negotiation regardless of the MTU configuration in the virtual template or the ip mtu adject feature.
CSCdw26727
In the past, when the route processor of the PRE was injecting traffic that was destined for an ATM interface, some ping packets were corrupted before they left the Cisco 10000 series ESR. This problem has been fixed.
CSCdw34613
Previously, accounting records on the RADIUS server contained the NAS-IP-Address (attribute 4) of the LNS, instead of the NAS-IP-Address of the LAC. This problem has been fixed.
Resolved Caveats in Cisco IOS Release 12.2(2)BY2
This section lists caveats found since the release of Cisco IOS Release 12.2(2)BY1 and are fixed in Cisco IOS Release 12.2(2)BY2.
CSCdw65903
An error can occur with management protocol processing. Please use the following URL for further information:
http://www.cisco.com/cgi-bin/bugtool/onebug.pl?bugid=CSCdw65903
Caveats in Cisco IOS Release 12.2(2)BY1
Table 3 describes the caveats for the Cisco 10000 series ESR running Cisco IOS Release 12.2(2)BY1.
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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All other trademarks mentioned in this document or Web site 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. (0201R)
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