Field Notice: FN - 64106 - Nexus N56-M24UP2Q Modules Incompatibility Issue - Replace on Failure

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	16-May-16	Initial Release
10.0	09-Oct-17	Migration to new field notice system
10.1	22-May-18	Fixed Broken Image Links
10.21	06-Aug-18	Updated the Workaround/Solution Section

Products Affected

Affected Product ID	Comments
N56-M24UP2Q	68- assembly is manufactured with a new ASIC - TAN phased to production thru ECO EA527154

Defect Information

Defect ID	Headline
CSCut89127	Certain N56-M24UP2Q modules do not come up in Nexus 56128

Problem Description

Some Nexus N56-M24UP2Q modules are incompatible with certain Nexus N5K-C56128P chassis and fail to change to online status when plugged into the chassis.

Background

The N56-M24UPQ module and N5K-C56128P chassis underwent a hardware revision in Dec 2015. Although low in occurrence, certain N56-M24UPQ modules released after this revision are incompatible with N5K-C56128P chassis released prior to the revision.

N56-M24UP2Q modules with top assembly number (TAN) 68-5671-01 are not compatible with N5K-C56128P chassis that have TAN 68-5193-02 or 68-5193-03.

N56-M24UP2Q modules with TAN other than 68-5671-01 are compatible with any hardware version of the N5K-C56128P chassis.

Cisco has determined the root cause of the problem and identified a fix which was implemented through a minor hardware revision on the modules. This fix enables the N56-M24UP2Q modules to be compatible with any version of the N5K-C56128P chassis.

Problem Symptom

This error can be seen upon module insertion:

Module X insertion failed. Module may not be seated properly or of wrong type. Remove module, ensure correct type and re-insert after five or more seconds.

Workaround/Solution

If the hardware shows an incompatible configuration as described in the "Background" section, request a Return Material Authorization (RMA) for the N56-M24UPQ module through the normal support process.

If the hardware shows a compatible configuration, the error is not due to Cisco bug ID CSCut89127 and the RMA should not be requested.

Refer to the "How to Identify Affected Products" section for instructions on how to view the TAN versions of the module and chassis.

How To Identify Affected Products

Location of the TAN on the N56-M24UP2Q module:

 

 

Alternatively, enter these show commands on the N5K-C56128P switch in order to retrieve the module and chassis TAN(s):

N56128# show sprom module 2 | include Part|Product|Serial

Product Number : N56-M24UP2Q

Serial Number : FOC18413R5Z

Part Number : 68-5671-01

Part Revision : A0

N56128#

N56128# show sprom backplane | include Part|Product|Serial

Product Number : N5K-C56128P

Serial Number : FOC1808R0XR

Part Number : 68-5193-02

Part Revision : A0

N56128#

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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