October 29, 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.
Revision History
|
Revision |
Date |
Comment |
|---|---|---|
|
1.0 |
29-OCT-2007 |
Initial Public Release |
Products Affected
|
Products Affected |
Comments |
|---|---|
|
15454-ONS - R7.X.X |
See Title |
Problem Description
The database can become corrupted on an ONS 15454 when provisioning, or pre-provisioning the AIC-I cards and AEP.
This issue affects any ONS 15454 that supports the AIC-I and Alarm Expansion Panel (AEP).
Background
The AIC-I card and the AEP on the ONS 15454 provide direct external alarm inputs, and external control output alarm contacts, routed through the backplane to wire-wrap pins, accessible from the back of the shelf. Under certain scenarios, provisioning of the AIC-I card can cause the database to become corrupt. The database load process on the ONS 15454 occurs during a TCC reboot, TCC protection switch, software activation, or database restore.
If a database has a specific AIC-I provisioning, a node may actually remain operational until there is a TCC reset. Upon reset, the existing database is read in by the software, and the error is detected, causing the corrupt database to be deleted from the TCC flash.
A database backup may contain the erroneous provisioning, and upon restore there is a TCC reset, which leads to the same set of events described above. The database backup contains the erroneous entries because it was taken after the erroneous provisioning and prior to a TCC reset.
Problem Symptoms
In the 7.x releases listed above, when a database is loaded containing this corruption, the load process fails, causing the corrupt database to be deleted from the TCC flash memory. If this issue occurs, you will see a loss of all provisioning after a TCC switch or reset.
Workaround/Solution
To detect this issue on a Network Element (NE), check that the AIC-I card is provisioned with the "Add extension" option checked, and that the card is provisioned as "External control". Avoid provisioning the AIC-I card with "External Control" first, and then selecting "Add extension".
If this provisioning exists, simply delete the AIC-I card and re-enter it. Once the AIC-I has cleared its restart, and a grace period is taken to allow the database to be written to flash memory (30 seconds), a new backup can be made.
Do not attempt to undo the AIC-I provisioning as this may cause an autonomous TCC reset, and lead to database deletion.
Releases 8.0 and above contain the fix for this issue.
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 |
|---|---|
|
CSCse41969 (registered customers only) |
AIC-I failed to retrieve AEP info in 7.0 |
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:
Receive Email Notification For New Field Notices
Product Alert Tool - Set up a profile to receive email updates about reliability, safety, network security, and end-of-sale issues for the Cisco products you specify.