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|Affected OS Type
||Affected Software Product
||Affected Release Number
16.3.1, 16.3.1a, 16.3.2, 16.3.3, 16.3.4, 16.3.5, 16.3.5b, 16.3.6, 16.3.7, 16.6.1, 16.6.1a, 16.6.2, 16.6.3, 16.6.4, 16.9.1, 16.9.1a, 16.9.1b, 16.9.1d
||Crash at expired "FED MAC AGING TIMER", "undefined" or "unknown" timer.|
Some Catalyst switches that run on Polaris Releases 16.9.1, 16.6.4, and 16.3.7 or earlier might crash due to the Forwarding Engine Driver (FED) process. For example, C3850-48XS or C9500 Series products.
The system will crash due to memory corruption in the “timer” structure used by the FED process. This issue can occur if a switchover is completed or the Stackwise Virtual Link (SVL) flaps.
The system will crash unexpectedly due to the FED process.
In order to fix the issue, upgrade the running software release to the fixed release.
|Running Software Release
||Available Fixed Release
|Polaris 16.9.1 or earlier
||Polaris 16.9.2 or later
|Polaris 16.6.4 or earlier
||Polaris 16.6.4a or later
|Polaris 16.3.7 or earlier
||Polaris 16.3.8 or later
Customers are encouraged to look on the Software Download page for the latest recommended release (marked with an *) for the respective release trains. You may want to refer to following link for Recommended Release for Catalyst Platform.
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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