Field Notice: FN - 72336 - Software Upgrade Fails Due to HW Changes Bits Value - Software Upgrade Recommended

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Updated:March 4, 2022

Document ID:FN72336

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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	25-Feb-22	Initial Release

Products Affected

Affected OS Type	Affected Software Product	Affected Release	Affected Release Number	Comments
NON-IOS	NX-OS System Software-ACI	14.2	14.2(2e), 14.2(2f), 14.2(2g), 14.2(3j), 14.2(3l), 14.2(3n), 14.2(3q), 14.2(4i), 14.2(4k), 14.2(4o)
NON-IOS	NX-OS System Software-ACI	15.0	15.0(1k), 15.0(1l), 15.0(2e)

Defect Information

Defect ID	Headline
CSCvv04251	N9K-C9316D-GX & N9K-C93600CD-GX failed to upgrade from 14.2.3 -> 14.2.4 due to bios upgrade failure

Problem Description

Known Cisco bug ID CSCvv04251 causes a policy upgrade to fail on the Cisco N9K-C9316D-GX and N9K-C93600CD-GX platforms that have hw_changes_bit programmed as "0x03".

In order to see the hw_changes_bit value, enter these CLI commands:

# vsh

# show sprom cpu-info

HW Changes Bits : 0x3

This issue occurs only when you attempt to upgrade Cisco N9K-C9316D-GX and N9K-C93600CD-GX switches from an affected software version to a subsequent release. Outside of the upgrade process, Cisco N9K-C9316D-GX and N9K-C93600CD-GX switches that run the affected software versions will operate under normal conditions.

Background

Cisco has identified a software issue with your selected release which might affect the use of this software. Review this field notice in order to determine if the issue applies to your environment. You can proceed to download this software if you have no concerns with the issue.

For more comprehensive information about what is included in this software, refer to the Cisco Application Policy Infrastructure Controller (APIC) documentation.

Problem Symptom

Known Cisco bug ID CSCvv04251 causes a policy upgrade to fail on the Cisco N9K-C9316D-GX and N9K-C93600CD-GX platforms that have hw_changes_bit programmed as "0x03".

Workaround/Solution

If you want to upgrade the software in your switches, complete this workaround in order to avoid the issue:

Upgrade the Cisco APICs and other devices in the fabric, except for the Cisco N9K-C9316D-GX and N9K-C93600CD-GX switches that run one of the affected software versions.
Contact the Cisco Technical Assistance Center (TAC) and request the TAC personnel to apply the workaround patch manually on the Cisco N9K-C9316D-GX and N9K-C93600CD-GX switches that run one of the affected software versions.

After the workaround patch is applied to the affected Cisco N9K-C9316D-GX and N9K-C93600CD-GX switches, you can perform the normal policy-based upgrade on these switches.

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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