Connectrix: Cisco MDS: 'PLATFORM-1-PFM_ALERT: FAN_BAD' incorrectly logging events for absent fans
Summary: Switch streaming "%PLATFORM-1-PFM_ALERT: FAN_BAD" related events for absent fans
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Symptoms
- Issue was observed on switches running on 8.3(1).
- The following events were streaming for absent fans:
%PLATFORM-1-PFM_ALERT: FAN_BAD: fan2 fan4
- The output of
#show environmentdepicts that the concerned fans are absent and not faulty.
Fan: ----------------------------------------------------------------------------------------------------------------- Fan Model Hw Status Airflow direction Fan Speed[Fan0-Fan1] (rpm) ----------------------------------------------------------------------------------------------------------------- ChassisFan1 FAN Module 1 -- Ok Back to Front 7142 - 5258 ChassisFan2 ---------- -- Absent NA NA ChassisFan3 FAN Module 3 -- Ok Back to Front 7161 - 5263 ChassisFan4 ---------- -- Absent NA NA Fan_in_PS1 -- -- Ok Back to Front -- Fan_in_PS2 -- -- Absent NA -- Fan Air Filter : NotSupported
Cause
Cisco issue: CSCvm02193
Resolution
There is no workaround as this is a cosmetic error but it is a frequent issue.
Verify if the fans are physically present or absent. If fans are absent, then upgrade the switch to 8.3(2) which has a fix for this issue.
Additional Information
Cisco issue CSCvm02193 is listed under "Resolved caveats in Cisco MDS NX-OS Release 8.3(2)."
A copy of the release notes 8.X is attached to the KB for reference.
A copy of the release notes 8.X is attached to the KB for reference.
Affected Products
Connectrix MDS-9132TArticle Properties
Article Number: 000188724
Article Type: Solution
Last Modified: 18 Jul 2025
Version: 4
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