Field Notice: FN74074 - Cisco Nexus Switch N9K-C9364D-GX2A Ports Might Be Link Down With 10.2(x) NXOS Releases - Software Upgrade Recommended

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Updated:September 6, 2024

Document ID:FN74074

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Medium

Impact Rating:

Medium

First Published:

2024-Sep-06

Last Published:

2024-Sep-06

Revision:

1.0

Cisco Bug IDs:

CSCwf85943

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

Affected Product Name	Description	Comments
N9K-C9364D-GX2A	Nexus 9300 Series, 64p 400G Switch
N9K-C9364D-GX2A=	Nexus 9300 Series, 64p 400G Switch

Defect Information

Defect ID	Headline
CSCwf85943	Duvel ports might be link down with nxos64-cs.10.2.3.F.bin

Problem Description

Some Cisco Nexus 9364D-GX2A Switches that are running Cisco NX-OS Software images from the 10.2(x) train may fail to bring link up on some front panel ports.

This issue affects only Cisco N9K-C9364D-GX2A switch models and 400/100-Gbps front-panel interfaces (Ethernet 1/1-64). Management port and 1/10-Gbps SFP+ ports (Ethernet1/65-66) are not affected.

Background

Cisco NX-OS Software images in the 10.2(x) train have older ASIC firmware that might cause link down issues on some ports. Images in the 10.3, 10.4, and later trains of Cisco NX-OS Software have the upgraded firmware with the fix for this issue.

Problem Symptom

Front panel ports on Cisco Nexus 9000 N9K-C9364D-GX2A switch models show the Link not connected status even when the Layer 1 cable, small form factor pluggables (SFPs), and neighbor ports are functioning correctly, as shown in the following example:

Eth1/13         106     eth  access down    Link not connected       auto(D) --
Eth1/14         107     eth  access down    Link not connected       auto(D) --

The port numbers shown above are only for example. It can be any front panel port from the Ethernet1/1-64 range.

Workaround/Solution

Workaround

There is no workaround available for this issue.

Solution

To fix the issue that is described in this field notice, upgrade software to Cisco NX-OS Software release trains 10.3(x), 10.4(x) or later from Cisco Nexus 9000 Series Switches.

How to Identify Affected Products

Cisco Nexus C9364D-GX2A switch models are supported starting with Cisco NX-OS Release 10.2(3)F.

To identify whether a port is affected by this issue, log in to the Cisco Nexus C9364D-GX2A switch and take the following steps:

1. Verify hardware model and Cisco NXOS Software release number. Only Cisco Nexus C9364D-GX2A switches that are running Cisco NXOS releases from 10.2(x) train are affected by this issue, as shown in the example output below:

N9K# show version | section Software|Hardware
Cisco Nexus Operating System (NX-OS) Software
Software
  NXOS: version 10.2(3) [Feature Release]       <<< affected release 10.2(3)F
  NXOS image file is: bootflash:///nxos64-cs.10.2.3.F.bin
Hardware
  cisco Nexus9000 C9364D-GX2A Chassis           <<< affected HW - Nexus C9364D-GX2A switch

2. Check whether a port is in a link down state even if there are no issues with physical connections such as connecting cable, SFPs, and neighbor ports. The following example shows a device on which ports 13 and 14 are affected by this issue:

N9K# show interface brief

--------------------------------------------------------------------------------
Ethernet        VLAN    Type Mode   Status  Reason                 Speed     Port
Interface                                                                    Ch #
--------------------------------------------------------------------------------
Eth1/13         106     eth  access down    Link not connected       auto(D) --
Eth1/14         107     eth  access down    Link not connected       auto(D) --

Revision History

Version	Description	Section	Date
1.0	Initial Release	—	2024-SEP-06

For More Information

For further assistance or for more information about this field notice, contact the Cisco Technical Assistance Center (TAC) using one of the following methods:

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