Field Notice: FN - 63943 - Memory Leak in UCS-C Cisco Integrated Management Controller (CIMC) Might Cause Memory Exhaustion for Systems with Extended Up-Times - 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	18-Aug-16	Initial Release
10.0	13-Oct-17	Migration to new field notice system

Products Affected

Affected Product ID	Comments
C260-BASE-2646
R460-4640810
UCSC-C22-M3L
UCSC-C22-M3S
UCSC-C220-M3L
UCSC-C220-M3S
UCSC-C220-M4L
UCSC-C220-M4S
UCSC-C24-M3L
UCSC-C24-M3S
UCSC-C24-M3S2
UCSC-C240-M3L
UCSC-C240-M3S
UCSC-C240-M4L
UCSC-C240-M4S
UCSC-C240-M4S2
UCSC-C240-M4SX
UCSC-C240-SNEBS
UCSC-C3160
UCSC-C420-M3
UCSC-C460-M4

Defect Information

Defect ID	Headline
CSCun88303	CIMC Memory Leak : Can't SSH/HTTP to CIMC
CSCus63934	CIMC memory leak observed in C-series managed by UCS Manager

Problem Description

A memory leak in the Cisco Integrated Management Controller (CIMC) software might cause systems with extended up-times to run out of memory.

Background

A memory leak has been discovered during storage operations. The leak is slow, and users that run Cisco UCS C-Series servers (standalone) or the Cisco Unified Computing System Manager (UCSM) with C-Series integration might discover that memory becomes exhausted. When memory becomes exhausted, communication is lost with the CIMC.

Note: The B-Series chassis are not impacted.

Problem Symptom

Most customers will first notice this issue when the communication with the CIMC is affected. The disruption in CIMC communication indicates that there is a problem. Customers can then act before the Operating System (OS) (business) is impacted.

Workaround/Solution

Until the software is released that corrects this issue, Cisco recommends that users monitor the free memory of their CIMC and plan a reload if the memory nears exhaustion. In order to avoid this issue, Cisco recommends that users upgrade their systems as shown in the tables that follow.

For C-Series Standalone Software (CIMC):

Version	Approximate FCS Date
1.4(x)	not impacted
1.5(1x)	Not Planned; upgrade to 1.5(3h) or later
1.5(2x)	Not Planned; upgrade to 1.5(3h) or later
1.5(3h)	cisco.com planned end of June 2015
1.5(4g)	cisco.com April 20, 2105
1.5(6x)	Not Planned Upgrade to 1.5(7f) when released
1.5(7f)	cisco.com planned: mid July
2.0(1c)	Not Planned; Upgrade to 2.0(3i) or later
2.0(2x)	Not Planned; Upgrade to 2.0(3i) or later
2.0(3i)	cisco.com: March 13, 2015
2.0(4c)	cisco.com : May 15, 2015
2.0(6d)	cisco.com : June 6, 2015

For UCSM Software:

Version	Approximate FCS Date
2.1(3h)	End of June
2.2(1h)	Mid June
2.2(3f)	cisco.com March 5, 2015
2.2(5a)	cisco.com June 5, 2015
3.0(1)	Not Planned; upgrade to 3.0(2) or later
3.0(2d)	End of June

Note: Refer to the Cisco UCS C-Series Rack-Mount Server BIOS Upgrade Guide for information about how to upgrade the UCS C-Series servers.

Note: Refer to the Cisco UCS C-Series Rack Servers web page for information about the UCS C-Series software releases.

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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