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Cisco Bug: CSCul97045 - Make the layer 3 scale profile the default for Trident linecards

Last Modified

Jul 20, 2018

Products (1)

  • Cisco ASR 9000 Series Aggregation Services Routers

Known Affected Releases

5.1.1.FWDG

Description (partial)

Symptom:
LC/0/2/CPU0:Dec  6 01:24:14.110 : fib_mgr[169]: %ROUTING-FIB-4-RSRC_LOW : CEF running low on DATA_TYPE_TABLE_SET resource memory. CEF will now begin resource constrained forwarding. Only route deletes will be handled in this state, which may result in mismatch between RIB/CEF. Traffic loss on certain prefixes can be expected. CEF will automatically resume normal operation, once the resource utilization returns to normal level.

Conditions:
This may happen on an ASR9000 which is handling the full internet routing table and some other other routes on top of the internet routes.

The default scale profile for Trident (Ethernet) linecards can handle 512K prefixes so we are getting close with the internet table and we may see the number of prefixes reaching the 512K limit in case of prefix burst, instability...

CSCul97045 is not a bug but a request to change the default scale profile to "l3" to increase the ipv4 unicast prefix capacity on Trident linecards from 512K to 1 million. The default l2vpn mac-address-table will be decrased from 512K to 128K entries so a customer requiring more than 128K MAC addresses in the mac-address-table will have to configure the new "l2" profile manually once CSCul97045 is integrated to come back to the previous default prior to CSCul97045.

Doc:

http://www.cisco.com/en/US/docs/routers/asr9000/software/asr9k_r4.3/system_management/configuration/guide/b_sysman_cg43asr9k_chapter_010.html

https://supportforums.cisco.com/docs/DOC-25489

Related Community Discussions

ASR9K: H/W profile を L3 に変更しても "show run" に反映されない
2015年1月19日(初版)   TAC SR Collection 主な問題 ASR9000 Trident LC で H/W Profile を L3 に変更する場合、 "hw-module profile scale l3" コマンドにて変更が可能ですが、IOS-XR 5.1.1 以降を使用している場合、変更結果が show run 上から確認できません。 ※Trident LC の H/W Profile 変更については下記も参考にしてください。Configuring Profiles on the Cisco ASR 9000 Series Router    < | 問題の確認方法> 1. admin mode から、H/W Profile を L3 | に変更します。 | RP/0/RSP0/CPU0:ASR9000(admin-config)#hw-module profile scale l3 In order to activate this new memory resource profile, you must manually reboot the line ...
Latest activity: Jan 22, 2015
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