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Field Notice: FN - 62642 - Intelligent Call Manage/IP Contact Center Version 7.1x - Use of Mobile Agent Nailed Up Connection with Specific IOS Versions Will Cause Memory Leak and Possible Gateway Assert and Loss of Calls


January 5, 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.


Products Affected

Products Affected

12.4(6)T1 - 12.4(11)T - H.323 Gateways

ICM IPCC - 7.1(x)

Problem Description

A memory leak problem in some versions of IOS software images with the H.323 Gateway feature may result in dropped calls with ICM/IPCC Mobile Agent deployments.

Background

A software defect in the Cisco IOS H.323 Gateway feature can cause IOS to consume all working memory (memory leak) when using Mobile Agent nailed up connections. The failure condition can cause IOS to restart and drop all calls through the gateway. All Cisco IOS software images with the H.323 Gateway feature from version 12.4(6)T1 through 12.4(11)T are affected. The failure occurs on all supported hardware platforms running the affected software.

Problem Symptoms

Due to an implementation defect in connection processing, Cisco IOS H.323 gateways begin accumulating memory after Mobile Agent connections are established using nailed up mode. Memory accumulation continues as new connection requests are received by the gateway. Accumulated memory is not released until the nailed up connections are terminated. The Cisco IOS H.323 gateway will steadily consume its available operating memory and eventually restart with a Software forced crash error.

Workaround/Solution

Possible workarounds include:

  • Use "Call by Call" delivery mode instead of Nailed up. The memory leak failure does not occur in the Call by Call delivery mode. This workaround is not available for Outbound Option agents that wish to use the Mobile Agent feature.

  • Ensure Mobile Agents using Nailed up delivery mode log out and log in again after 3 to 4 hours of activity. Logging out releases extra memory being held and avoids the failure condition.

Solution:

A software fix for this defect will be included in Cisco IOS version 12.4(11)T. Additional defect details and fix availability may be found in the DDTS section below. Registered Cisco.com users may monitor defect details using Cisco.com Bug Toolkit.

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

CSCsg56996 (registered customers only)

H323 Gateway crashing due to memory leak

Revision History

Revision

Date

Comment

1.0

05-JAN-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:

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