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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

6.1(2)I2(0.230)

Description (partial)

Symptom:
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.

Conditions:
-Empty PSU slot
-Back to Front airflow
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