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Table Of Contents
Release Notes for the Cisco 10000 ESR for Cisco IOS Release 12.0(11)SL1
Upgrading to a New Software Release
Cisco 10000 ESR Software Features
ChOC-12 and OC-12 ATM Line Card Support
Automatic Protection Switching Support
Channelized OC-12 Line Card Caveats
Resolved in Cisco IOS Release 12.0(11)SL1
Obtaining Technical Assistance
Contacting TAC by Using the Cisco TAC Web Site
Release Notes for the Cisco 10000 ESR for Cisco IOS Release 12.0(11)SL1
February 20, 2000
These release notes provide information about Cisco IOS Release 12.0(11)SL1, which runs on the Cisco 10000 Edge Services Router (ESR).
These release notes have been updated to include a fix for an SNMP problem (see CSCdt34097). Beyond the fix for CSCdt34097, these release notes are identical to the release notes for Cisco IOS Release 12.0(11)SL, which are included for your convenience.
Cisco IOS Release 12.0(11)SL1 is based on Cisco IOS Release 12.0(11)SL. For a list of the software caveats that apply to Cisco IOS Release 12.0(11)SL1, see the "Caveats" section and the release notes for Cisco IOS Release 12.0(S). To review the release notes for Cisco IOS Release 12.0S, go to www.cisco.com and click Technical Documents > Cisco Product Documentation > Cisco IOS Software Configuration > Cisco IOS Release 12.0 > Release Notes > Cisco 12000 Series Router > Cisco 7000 Family and 12000 Series - Release Notes for Release 12.0(S).
Use these release notes in conjunction with the cross-platform Release Notes for Cisco IOS Release 12.0.
Contents
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Upgrading to a New Software Release
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Upgrading to a New Software Release
For specific information about upgrading your Cisco 10000 ESR to a new software release, see the Cisco 10000 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
We recommend that you use 512 MB of memory on the Performance Routing Engine (PRE). New PREs are shipped with 512 MB of memory. In a redundant setup, both PREs should have the same amount of memory.
Cisco 10000 ESR Software Features
The following features are supported in the Cisco 10000 ESR.
Limitations and Restrictions
This section describes important limitations and restrictions that you should review before you use the Cisco 10000 ESR.
ChOC-12 and OC-12 ATM Line Card Support
Software support is available for the Channelized OC-12 (ChOC-12) line card and the OC-12 ATM line card.
Be sure to review the caveats described in the "Channelized OC-12 Line Card Caveats" section and the "OC-12 ATM Line Card Caveats" section.
Automatic Protection Switching Support
Automatic protection switching is supported on the OC-12 POS line card, with the following limitation.
For APS to work properly, you must always have an OC-12 POS line card installed in the lower-numbered (odd) slot.
The system receives clocking information from the line card in the odd slot. If you remove the odd-numbered card (or if the clocking mechanism on that card fails), the clocking is lost and the data path is shut down. (Caveat CSCdr81416)
To manage this APS behavior, we recommend the following:
1.
2.
Router(config)# redundancyRouter(config-r)# no associate 5 6Router(config-r-a-sl)# exitRouter(config)# interface pos 5/0/0Router(config-if)# shutdownYou can now remove the card in slot 5.
3.
Important Notes
You can run up to 2000 Frame Relay sessions or 1300 PPP sessions, and you can configure up to 300 BGP peers on the Cisco 10000 ESR. The router also supports up to 512 Multilink Point-to-Point (MLP) protocol sessions.
Note
Caveats
This section describes the caveats for the Cisco 10000 ESR running under Cisco IOS software Release 12.0(11)SL. Additional caveats can be found in the "Channelized OC-12 Line Card Caveats" section and the "OC-12 ATM Line Card Caveats" section.
CSCdr19206
If you preconfigure a line card using the card command, this significantly degrades PRE performance.
Workaround: Do not use the card command to preconfigure line cards. Instead, use the no card command to remove references to cards that are not in the chassis.
CSCdr25441
The router sends out DHCP INFORM and DISCOVER messages containing an incorrect Ethernet address.
Workaround: No workaround is necessary. This caveat is harmless because these DHCP messages are not used to acquire IP addresses. They are used to gather environmental data such as the domain name server address.
CSCdr36564
When you use the Frame Relay autosense feature, the Cisco 10000 ESR sends all three LMI status message types immediately after the interface starts responding. However, sometimes the switch at the other end is not ready to receive messages and as a result, misses one or two messages that were sent. LMI autosense waits until the next scheduled interval (default is 1 minute) to send the messages again.
This problem primarily affects clear channel CT3 interfaces.
Workaround: There is currently no workaround.
CSCdr43835
When you send large numbers of packets from the Gigabit Ethernet line card to the PRE in the Cisco 10000 ESR, you may lose a small number of packets. This only occurs for some packet sizes at very high bandwidths, with loss rates of a few parts per million.
Workaround: There is currently no workaround.
CSCdr47500
During periods of heavy traffic (approaching interface line rate), some interfaces may experience inconsistent performance between interfaces of the same type.
Workaround: There is currently no workaround.
CSCdr50586
You cannot generate FDL Bellcore remote loopback requests.
The Bellcore keyword in the t1 <t1-number> loopback remote line fdl bellcore command is not supported. Bellcore (Telcordia) began phasing out their standard in favor of the ANSI standard in the early 1990s.
The software responds to FDL Bellcore remote loopback requests, but does not generate these requests.
Workaround: Use the t1 <t1-number> loopback remote line fdl ansi command to run a remote loopback.
CSCdr52081 and CSCdj94209
The PRE may crash if you repeatedly change a port back and forth from channelized to unchannelized.
Repeated conversions of a T3 port from channelized mode to unchannelized mode and back, with intervening assignments of IP addresses to the interfaces and ping testing, may cause the PRE crash.
Workaround: Reload the chassis.
CSCdr52708
If you remove a line card during periods of heavy traffic and then reinsert it (or another line card of the same type), on rare occasion the card fails to pass traffic.
Workaround: Use the shutdown command to shut down interfaces and controllers before you remove the line card. If a failure occurs, you can activate the card by entering the privileged EXEC mode microcode reload pxf command.
CSCdr62013
If large MLP configurations are in use, and you attempt to copy the configuration from a TFTP server directly into the running config, the copy may fail. Failures may include interfaces not appearing or IPCP or LCP states not opening correctly.
Workaround: These failures are far less likely to occur if the configuration is copied to bootflash, and then from bootflash to the running config. Copy the configuration file to the startup config and then reload the router.
CSCdr81416
Limited support for APS. For detailed information, refer to the "Automatic Protection Switching Support" section.
CSCdr92058 and CSCdr98370
Large multicast groups may cause CPU hog issues in the PIM process. The tested number of 500 destinations in one group caused CPU hog messages (max limit is unknown).
Workaround: There is currently no workaround.
CSCdr95685
Packet throughput may be less than optimal on all interfaces when a large number of MLP bundles are configured or during periods of heavy MLP traffic.
Workaround: Limit the number of MLP bundles you configure.
CSCdr98341
The Flash disk can fall into the chassis when you insert the disk into the empty space to the right of the slot B in the PRE flash assembly.
Workaround: Pay extra attention when inserting a flash disk into the PRE flash assembly. Do not insert the disk in the empty space to the right of the slot B—if you insert a card in that space, it will fall into the chassis.
CSCds01233
If you send a large number of small packets in large multicast groups, this may cause the following debug messages to appear on the console:
### ASSERTION FAILURE in../src-4k-c10k/c10k_isr_ct3.c, line 548<idb invalid on vc 0x624FA974, slot 12 port 0 chan 104dh 05E0001F 680100FF>60044EB4 60016E48 60017238 601F2C9C 601D0404### ASSERTION FAILURE in../src-4k-c10k/c10k_isr_ct3.c, line 535<port 7 invalid>60044CEC 60016E48 60017238 601F2C9C 601D0404Workaround: Decrease the number of small packets.
CSCds04367
When older CT3 line cards are powered on with live DS3 signals present at the receive BNC connector, the receive line interface device on the board may lock up, preventing the controller from running. You can verify this symptom by using the show controller t3 command, which shows that the controller is down, the Receiver has Loss of Frame, and the Line Code Violations counter is counting errors at a rapid rate.
Workaround: Replace the CT3 line card with an upgraded line card. CT3 line cards with Version 800-05547-04 Revision A0 or later have a hardware design change to avoid this problem. On older cards, you can work around the problem by removing the receive signal momentarily after the line card is powered on. For example, remove and reinsert the coaxial cable on the associated RX BNC connector on the rear of the chassis.
CSCds20932
When a Cisco 10000 is reloaded with a large number interfaces configured as Frame Relay DCE, line cards may report down and up again before the chassis stabilizes.
Workaround: Wait for couple of minutes until the chassis stabilizes.
CSCds25069
The default logging parameter (logging rate-limit console all 10 except critical) sets console logging to disabled.
Workaround: Enter the logging console critical command to view the most important events such as card up/down and toaster failure events.
CSCds26407
If you are running more than 1300 PPP sessions on a Cisco 10000, some of those sessions may not come up after you reload the Cisco 10000. In the show interface command display, those sessions may appear in an LCP closed state or an IPCP closed state.
Workaround: Shut/no shut the underlying interface.
CSCds36117
If you enter the clear ip mroute command on a system with large multicast groups, CPU hog issues may arise that cause problems of moderate severity (such as losing keepalives).
Workaround: Do not use the clear ip mroute command in large multicast groups.
CSCds41791
If you reload a Cisco 10000, some initialization messages are logged to the console before the startup-config is loaded. These initialization messages are transitional and may report an incorrect state, especially for the FastEthernet interface.
00:00:15: Downloading Microcode: file=system:pxf/ucode_file, version=2.0(21.4), description=Nightly Build Software created Wed 13-Sep-00 00:3800:00:21: %LINK-3-UPDOWN: Interface Ethernet0/0/0, changed state to up00:00:21: %LINK-5-CHANGED: Interface FastEthernet0/0/0, changed state to reset00:00:23: %LINEPROTO-5-UPDOWN: Line protocol on Interface Ethernet0/0/0, changed state to up0:00:23: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0/0, changed state to downThese messages are not displayed in the buffered log.
Workaround: Ignore these messages.
CSCds42218
Under heavy load on the Cisco 10000, serial line keepalives may be dropped, which causes serial lines to go down and then recover.
Workaround: There is currently no workaround.
CSCds49957
When you boot the Cisco 10000, the system may display the following messages:
*Oct 17 12:32:48.287: %SNMP-3-TRAPBLOCK: Attempt to generate SNMP trap from a process with blocking disabled-Traceback= 60565064 606A6B34 60678238 60678438 6067AD88 6067AF30 602FCBDC 6024817C 60248168Workaround: Ignore the messages.
CSCds50146
If you run the show interface command on interfaces with HDLC encapsulation, the input bytes statistics do not update properly. The input bytes display (or polling the mib value if InOctets) reports a very large (a negative value) number.
Workaround: There is currently no workaround.
CSCds50249
If incoming multicast packets match an input access list that has the log option enabled, the output of the show log command and show access-list commands display double the number of matches.
Workaround: There is currently no workaround.
CSCds50625
If the PRE microcode is reloaded because of an unusual condition (such as a system crash), multiple pxf_crashinfo files are produced within a 1 or 2 seconds of each other.
Workaround: There is currently no workaround.
CSCds51102
If you perform an SNMP walk or view entries in the if table, cef-layer internal interfaces appear in the interface table.
Workaround: Ignore interfaces whose descriptor contains the string .0-cef layer.
CSCds51521
Inverse ARP requests are sometimes generated for only 5 of 10 configured PVCs.
Workaround: There is currently no workaround.
CSCds53043
A large number of BGP networks can cause 100% CPU utilization on the PRE. If this occurs, the line cards may reload.
Workaround: There is currently no workaround.
CSCds55172
The CLI help text for the access-list command does not show the A.B.C.D option for the source address. For example:
Router(config)#access-list 1 ?deny Specify packets to rejectpermit Specify packets to forwardWorkaround: Disregard the help text and, enter the complete access-list command as you normally do. For example:
Router(config)#access-list 1 permit 1.1.1.1 0.255.255.255 logRouter(config)#CSCds55817
If you copy a large set of reconfiguration instructions to a large configuration using TFTP, the Cisco 10000 can crash. For example, if the configuration instructs the system to run the no channelized command on each T3 controller, the router may crash.
Workaround: Either limit the number of reconfiguration instructions, or reload the router with a blank configuration before you copy config information into the running config.
CSCds55838
When you change the configuration of the two PRE slots from redundant to nonredundant, TBB_LENGTH_ERRORs appear and the PXF reloads.
#config t(config)#red(config-r)#no associate slot 1 2<now TBB_LENGTH_ERROR message appear, and toaster reload>This problem occurs if you first boot the system without APS, then configure APS, then deconfigure APS while there is active traffic on the redundant slot.
Workaround: Boot the system with APS configured before deconfiguring it, or turn off all traffic, keepalives, and CDP packets on the secondary slot before deconfiguring APS.
CSCds57109
On rare occasions, a hardware timing problem may cause a PRE fault.
If this error occurs, the event below is logged in SysLog as follows:
%C10KEVENTMGR-1-MAJOR_FAULT: PXF DMA TBB Length Error, Restarting PXFWorkaround: There is no workaround for this problem. The PXF is restarted by Cisco IOS and normal communications should resume.
Channelized OC-12 Line Card Caveats
This section describes the caveats for the Cisco 10000 ESR ChOC-12 line card.
OC-12 ATM Line Card Caveats
This section describes the caveats for the Cisco 10000 ESR OC-12 ATM line card.
Resolved in Cisco IOS Release 12.0(11)SL1
This section lists problems that are resolved in Cisco IOS Release 12.0(11)SL1. For a list of problems that were resolved in previous Cisco IOS Releases, refer to the release notes for those particular versions.
CSCdt34097
Snmpwalk skips OIDs, so some interfaces are missed in the walk.
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 web site.
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 web site:
http://www.cisco.com
Technical Assistance Center
The Cisco TAC web site is available to all customers who require 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 Web Site
If you have a priority level 3 (P3) or priority level 4 (P4) problem, contact TAC by going to the TAC web site:
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 web site to quickly find answers to your questions.
To register for Cisco.com, go to the following web site:
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 web site:
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 web site:
http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml
P1 and P2 level problems are defined as follows:
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