Field Notice: FN - 62413 - ONS - 15454/15454E ML Alarm Database Corrupted by Circuit Creations and Deletions, RPR Protection Fails

June 21, 2006

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
15454 - 15454-ML1000-2(=)
15454 - 15454-ML100T-12(=)
15454 - 15454-ML100X-8(=)
15454E - 15454E-ML1000-2(=)
15454E - 15454E-ML100T-12(=)

Problem Description

CSCef62420 describes an issue with the ML cards, where after a sequence of circuit creations and deletions, the ML card can get into a state where it might not bring down the POS ports even when there is a SONET defect present. When RPR is used, this has the potential to cause traffic outages. This defect is present in releases 4.6 through 4.6.3 and has been fixed in 4.6.4 and 5.x and later releases.

Background

This issue was discovered during testing of the ML series cards in environments incorporating the affected software revisions 4.6 through 4.6.3.

Problem Symptoms

Due to the issue described above, the ML-series RPR protection will fail. SONET/SDH failure will lead to a traffic outage. SONET failures are not reported on POS ports.

Workaround/Solution

After deleting the second circuit, change the admin state of the first circuit to OOS and then to IS. Allow a minimum of five seconds between the OOS to IS state change. This issue can be avoided by migrating to Release 4.6.4 or later. Release 6.2 is the recommended release for ML RPR deployments.

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
CSCef62420 (registered customers only)	ML Alarm database corrupted by circuit deletion, RPR protection fails

Revision History

Revision	Date	Comment
1.0	21-JUN-2006	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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