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Cisco Bug: CSCun69134 - Empty PSU Slot Detected as Front-To-Back Air Flow

Last Modified

Feb 14, 2018

Products (1)

  • Cisco Nexus 9000 Series Switches

Known Affected Releases


Description (partial)

An error message is seen in the syslog for opposite fan direction if no PSU is present when all other airflow is Back-To-Front:

%PLATFORM-1-PFM_ALERT: OPPOSITE_FAN_DIR: Some fan-trays and/or power-supply fans are
operating in opposite direction. PS(1) operating with Front-to-Back air flow. Fan-tray(1,2,3) and PS(2) operating with Back-to-Front air flow.

-Empty PSU slot
-Back to Front airflow
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