Field Notice: FN - 62766 - uBR10K Loses Partial Configuration After PRE Failover

April 24, 2007

NOTICE:

THIS FIELD NOTICE IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTY OF MERCHANTABILITY. YOUR USE OF THE INFORMATION ON THE FIELD NOTICE OR MATERIALS LINKED FROM THE FIELD NOTICE IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS FIELD NOTICE AT ANY TIME.

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Products Affected

Products Affected
UBR10K - UBR10-PRE=

Problem Description

A uBR10K running 12.3(13a)BCx might lose partial configuration after a PRE failover. Primarily, the Authentication, Authorization and Accounting (AAA) commands have been found to disappear after a PRE switchover. Moreover, these commands are not recognized or accepted when running on the secondary PRE.

Background

AAA commands have been found to disappear after a PRE switchover when a Cisco uBR10K CMTS upgrades from 12.3(9a)BCx to 12.3(13a)BCx or higher images (for instance, to 12.3(17x)BCx).

Problem Symptoms

If you manually enter the lost AAA commands after PRE failover, the following will result:

aaa authentication enable default group tacacs+ enable 
^ % Invalid input detected at '^' marker. 

aaa authorization exec default local group tacacs+ none 
^ % Invalid input detected at '^' marker.

Issuing a ? command at the config prompt does not show the missing commands as listed options.

Workaround/Solution

In order to proactively avoid running into this AAA config lost problem after PRE failover while running IOS version 12.3(13a)BCx, issue a wr mem on the active PRE and reload the Standby PRE beforehand, right after upgrading from 12.3(9a)BCx to 12.3(13a)BCx:

UBR10K# write mem 
UBR10K# hw-module sec-cpu reset

DDTS

To follow the bug ID link below and see detailed bug information, you must be a registered user and you must be logged in.

DDTS	Description
CSCek40860 (registered customers only)	Partial config loss after PRE failover

Revision History

Revision	Date	Comment
1.0	24-APR-2007	Initial Public Release

For More Information

If you require further assistance, or if you have any further questions regarding this field notice, please contact the Cisco Systems Technical Assistance Center (TAC) by one of the following methods:

• Open a service request on Cisco.com
• By email
• By telephone

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