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Maintain the Fan Tray

The fan tray installs into the rear of the chassis, as shown in Figure 3. To check the status of the fans in the fan tray, issue the show chassis environment command. The output includes an entry for each fan, as shown in this example:

user@host> show chassis environment

Class Item             Status  Measurement
...
Fans  Left Fan 1       OK      Spinning at normal speed
      Left Fan 2       OK      Spinning at normal speed
      Left Fan 3       OK      Spinning at normal speed
      Left Fan 4       OK      Spinning at normal speed
...

For further description of the output from the command, see the JUNOS Internet Software Operational Mode Command Reference: Protocols, Class of Service, Chassis, and Management.

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