Field Notice: FN - 70359 - C3650/C3850 and C9300/C9500 Devices That Run on Certain Cisco IOS XE 16.3.x or 16.6.x Software Releases Might Observe a Memory Leak - Software Upgrade Recommended

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	23-Jan-19	Initial Release
1.1	24-Jan-19	Updated the Products Affected Section
1.2	21-Feb-19	Updated the Title, Products Affected, Problem Description, and Workaround/Solution Sections

Products Affected

Affected OS Type	Affected Software Product	Affected Release	Affected Release Number	Comments
NON-IOS	IOSXE	16	16.3.1, 16.3.1a, 16.3.2, 16.3.3, 16.3.4, 16.3.5, 16.3.5b, 16.6.1, 16.6.1a, 16.6.2, 16.6.3

Defect Information

Defect ID	Headline
CSCvh89372	Memory leak in linux_iosd-imag and/or platform_mgr after every FRU removable

Problem Description

C3650/C3850 and C9300/C9500 devices that run on a Cisco IOS^® XE Software Release as mentioned in Products Affected List might observe a memory leak in "linux_iosd-imag" and "platform_mgr" processes. The issue might also be observed on the active switch on a stack.

Background

This memory leak is caused by incorrect internal memory handling. As a result, the memory is not freed correctly.

Problem Symptom

If a C3650/C3850 or C9300/C9500 device is impacted by this issue, the processes "linux_iosd-imag" and/or "platform_mgr" will display increasing memory size when checked with this show CLI command.

Switch#show platform software process memory switch 1 r0 all sorted

   Pid     VIRT       RSS      PSS      Heap    Shared  Private              Name
------------------------------------------------------------------------------------
  5329  1796052    621080    527162        80   108284    512796   linux_iosd-imag  

 15755   917476    119924     34383      1752    98220     21704      platform_mgr


Switch#show platform software process memory switch 1 r0 all sorted

   Pid     VIRT       RSS       PSS      Heap   Shared   Private            Name
------------------------------------------------------------------------------------
  5329  1870404    712544    617188        80   110276    602268   linux_iosd-imag   

 15755   968948    172380     85746     52900    99380     73000      platform_mgr  

In the previous two displays, the memory size under the RSS column increased by 90Mb for "linux_iosd-imag" process and by 60 Mb for "platform_mgr" process.

For further information on how to determine if the device is affected by the leak, see this Cisco bug discussion.

Workaround/Solution

As a temporary workaround, reload the switch in order to reclaim memory.

For a permanent fix, upgrade to Cisco IOS XE Software Release 16.3.6, 16.6.4, 16.9.1, or later.  We recommend customers to review CCO download page on current recommended starred release in these release trains. All members of a stack should be software upgraded.

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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