Maintaining the M7i Cooling System
Purpose
For optimum cooling, verify the condition of the fans.
Action
The router has a single fan tray that installs into the back of the chassis, as shown in M7i Chassis Description.
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 in the fan tray:
user@host> show chassis environmentClass Item Status Measurement
Power Power Supply 0 OK
Power Supply 1 OK
Temp Intake OK 24 degrees C / 75 degrees F
PICs OK 27 degrees C / 80 degrees F
Power Supplies OK 27 degrees C / 80 degrees F
CFEB Intake OK 27 degrees C / 80 degrees F
CFEB Exhaust OK 33 degrees C / 91 degrees F
Routing Engine OK 26 degrees C / 78 degrees F
Fans Left Fan Tray Present
Left Tray front fan OK Spinning at normal speed
Left Tray second fan OK Spinning at normal speed
Left Tray third fan OK Spinning at normal speed
Left Tray fourth fan OK Spinning at normal speedFor further description of the output from the command, see the Junos System Basics and Services Command Reference.
