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Maintaining the M320 Fan Trays



For optimum cooling, verify the condition of the fans.


On a regular basis:

  • Monitor the status of the fans. The fan trays each contain multiple fans that work in unison to cool the router components. If one fan fails, the host subsystem adjusts the speed of the remaining fans to maintain proper cooling. A red alarm is triggered when a fan fails, and a yellow alarm is triggered when a fan tray is removed.

  • To display the status of the fans, issue the show chassis environment command. The output is similar to the following:

    user@host> show chassis environment