Field Notice: FN - 64161 - Nexus 6004 Switch Might Hang Due to PCIE Issue - Replace on Failure
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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 |
30-Mar-17 |
Initial Release |
10.0 |
19-Oct-17 |
Migration to new field notice system |
11.0 |
11-Jul-18 |
Updated the Workaround/Solution Section |
11.1 |
10-Jun-21 |
Updated the Workaround/Solution Section |
Products Affected
| Affected Product ID | Comments |
|---|---|
N6K-C6004 |
-B0 and lower are affected |
N6K-C6004-96Q |
-A0 is affected |
N6K-C6004-96Q |
-A0 is affected |
N6K-C6004-96Q= |
-A0 is affected |
N6K-C6004-96Q= |
-A0 is affected |
N6K-C6004= |
-B0 and lower are affected |
Defect Information
| Defect ID | Headline |
|---|---|
| CSCun18933 | Nexus 6004: Switch hang due to PCIe issue |
Problem Description
The Nexus 6004 switch might hang with no response from the mgmt0 interface and console ports.
Background
There is an insufficient design margin in the PCIe circuitry of the Nexus N6K-C6004-96Q(=) and N6K-C6004(=) switches which over time might result in switch degradation and ultimately a failure state. The switch might also not respond on mgmt0 interface and console ports.
A switch reload might temporarily resolve the failure state, but will not resolve the underlying hardware (HW) issues.
This issue is seen in Nexus 6004 switches with Top Assembly Numbers (TANs) 68-4623-01, 68-4623-03, and 68-4148-01.
This issue does not affect Nexus 6001 switches.
Problem Symptom
These symptoms might be seen:
- The switch hangs with no response from the mgmt0 interface and console ports.
- All interfaces go into a faulty state.
- Switches that run NXOS version 7.0(3) and later will display syslog messages similar to this message in the logs:
2016 Jun 4 19:59:15 esc-6004-A %USER-0-SYSTEM_MSG: 080: PCIe critical FAILURE DETECTED, contact Cisco TAC - pfm
Workaround/Solution
If you experience the symptoms described in the previous section, verify whether the switch is impacted per the Impacted Switches table and the instructions in the How to Identify Affected Products section. If the unit is impacted, request a Return Material Authorization (RMA) for Fix on Failure.
Impacted Switches
| Product Number | Part Number (TAN) | Part Revision (TAN Revision) |
|---|---|---|
| N6K-C6004(=) | 68-4148-01 | -B0 and lower |
| N6K-C6004-96Q(=) | 68-4623-01 | -A0 |
| N6K-C6004-96Q(=) | 68-4623-03 | -A0 |
Non-Impacted Switches
| Product Number | Part Number (TAN) | Part Revision (TAN Revision) |
|---|---|---|
| N6K-C6004(=) | 68-4148-01 | -C0 |
| N6K-C6004(=) | 68-5296-01 | -A0 and higher |
| N6K-C6004(=) | 68-5296-02 | -A0 and higher |
| N6K-C6004-96Q(=) | 68-4623-03 | -B0 |
| N6K-C6004-96Q(=) | 68-5377-01 | -A0 and higher |
| N6K-C6004-96Q(=) | 68-5377-02 | -A0 and higher |
How To Identify Affected Products
In order to view product information, enter this command:
esc-6004-A# show sprom backplane | egrep Product|Serial|Part|H/W Product Number : N6K-C6004-96Q Serial Number : FOC1711R0QG Part Number : 68-4623-01 Part Revision : A0 H/W Version : 1.0 esc-6004-A#
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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