Field Notice: FN - 64136 - ASR 900 Series Routers (903/907/920) Memory Leak Issue. - Software Upgrade Recommended

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Updated:October 11, 2017
Document ID:FN64136

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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 Publish Date Comments
1.0
14-Apr-16
Initial Release
10.0
11-Oct-17
Migration to new field notice system

Products Affected

Affected Product ID Comments
ASR-902
ASR-903
ASR-907
ASR-920-10SZ-PD
ASR-920-12CZ-A
ASR-920-12CZ-D
ASR-920-12SZ-IM
ASR-920-24SZ-IM
ASR-920-24SZ-M
ASR-920-24TZ-M
ASR-920-4SZ-A
ASR-920-4SZ-D

Defect Information

Defect ID Headline
CSCux91894 ASR9xx iomd memory leak

Problem Description

Some ASR 900 Series routers (see the Products Affected section) show a memory leak with these software releases:

- 15.5(1)S3 (XE Version 3.14.3)

- 15.5(2)S2 (XE Version (3.15.2))

- 15.5(3)S1a (XE Version 3.16.1a)

- 15.6(1)S (XE Version 3.17)

This issue is due to a software bug, Cisco bug ID CSCux91894, associated with this release.

This has been fixed and customers are requested to migrate/upgrade to the latest release in order to overcome this issue:

- 15.5(2)S3 (XE Version 3.15.3)

- 15.5(3)S2a (XE Version 3.16.2a or later)

- 15.6(1)S1 (XE Version 3.17.1 or later)

- 15.6(2)S (XE Version 3.18 or later)

Background

Cisco has identified a memory leak on certain software versions associated with the ASR 900 Series routers (ASR 902/903/907/920).

This memory leak is due to a defect, Cisco bug ID CSCux91894, which causes a memory leak with the default configuration.

Problem Symptom

A memory leak on the ASR 900 Series routers is seen under the iomd process and even when the node state is idle.

When executed, this command shows the increased memory leak under spa_xcvr_oir.

#show platform software memory iomd 0/0 brief

The increased memory leak might cause the router to crash and reboot multiple times.

Workaround/Solution

Cisco recommends that you upgrade to a later release based on your current Cisco IOS-XE version in order to overcome this issue.

Current Cisco IOS-XE VersionRecommended Cisco IOS-XE Version
15.5(1)S3 (XE: 3.14.3)15.5(3)S2a (XE Version 3.16.2a or later)
15.5(2)S2 (XE: 3.15.2)15.5(2)S3 (XE Version 3.15.3)
15.5(3)S1a (XE: 3.16.1a)15.5(3)S2a (XE Version 3.16.2a or later)
15.6(1)S (XE: 3.17)15.6(1)S1 (XE Version 3.17.1 or later)

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:

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