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Maintaining the Fan Tray on the SRX3400 Services Gateway

The fan tray contains multiple fans that work in unison to cool the Services Gateway 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 and red alarm is triggered when a fan tray is removed.

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


user@host> show chassis environment
Class Item                           Status     Measurement
Temp  PEM 0                          OK
      PEM 1                          OK
      Routing Engine 0               OK
      Routing Engine 1               Absent
      CB 0 Intake                    OK         36 degrees C / 96 degrees F
      CB 0 Exhaust A                 OK         43 degrees C / 109 degrees F
      CB 0 Mezz                      OK         45 degrees C / 113 degrees F
      CB 1 Intake                    Absent
      CB 1 Exhaust A                 Absent
      CB 1 Mezz                      Absent
      FPC 0 Intake                   OK         35 degrees C / 95 degrees F
      FPC 0 Exhaust A                OK         35 degrees C / 95 degrees F
      FPC 0 Exhaust B                OK         36 degrees C / 96 degrees F
      FPC 0 SF                       OK         50 degrees C / 122 degrees F
      FPC 1 Intake                   OK         34 degrees C / 93 degrees F
      FPC 1 Exhaust A                OK         41 degrees C / 105 degrees F
      FPC 1 XLR                      OK         53 degrees C / 127 degrees F
      FPC 2 Intake                   OK         34 degrees C / 93 degrees F
      FPC 2 Exhaust A                OK         44 degrees C / 111 degrees F
      FPC 4 Intake                   OK         40 degrees C / 104 degrees F
      FPC 4 Exhaust A                OK         45 degrees C / 113 degrees F
      FPC 6 Intake                   OK         38 degrees C / 100 degrees F
      FPC 6 Exhaust A                OK         44 degrees C / 111 degrees F

Fans  Fan 1                          OK         Spinning at intermediate-speed
      Fan 2                          OK         Spinning at intermediate-speed
      Fan 3                          OK         Spinning at intermediate-speed
      Fan 4                          OK         Spinning at intermediate-speed

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