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    Maintaining the Fan Tray in EX9208 Switches

    Purpose

    For optimum cooling, verify the condition of the fans.

    Action

    • Monitor the status of the fans. A fan tray contains multiple fans that work in unison to cool the switch 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 a red alarm are 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@switch> show chassis environment
      Class Item                           Status     Measurement
      Temp  PEM 0                          OK         30 degrees C / 86 degrees F
            PEM 1                          OK         35 degrees C / 95 degrees F
            PEM 2                          Check
            PEM 3                          Absent
            Routing Engine 0               OK         31 degrees C / 87 degrees F
            Routing Engine 0 CPU           OK         30 degrees C / 86 degrees F
            Routing Engine 1               OK         33 degrees C / 91 degrees F
            Routing Engine 1 CPU           OK         31 degrees C / 87 degrees F
            CB 0 Intake                    OK         30 degrees C / 86 degrees F
            CB 0 Exhaust A                 OK         29 degrees C / 84 degrees F
            CB 0 Exhaust B                 OK         36 degrees C / 96 degrees F
            CB 0 ACBC                      OK         34 degrees C / 93 degrees F
            CB 0 XF A                      OK         50 degrees C / 122 degrees F
            CB 0 XF B                      OK         46 degrees C / 114 degrees F
            CB 1 Intake                    OK         30 degrees C / 86 degrees F
            CB 1 Exhaust A                 OK         29 degrees C / 84 degrees F
            CB 1 Exhaust B                 OK         37 degrees C / 98 degrees F
            CB 1 ACBC                      OK         33 degrees C / 91 degrees F
            CB 1 XF A                      OK         50 degrees C / 122 degrees F
            CB 1 XF B                      OK         46 degrees C / 114 degrees F
            FPC 0 Intake                   OK         30 degrees C / 86 degrees F
            FPC 0 Exhaust A                OK         36 degrees C / 96 degrees F
            FPC 0 Exhaust B                OK         34 degrees C / 93 degrees F
            FPC 0 LU 0 TCAM TSen           OK         40 degrees C / 104 degrees F
            FPC 0 LU 0 TCAM Chip           OK         42 degrees C / 107 degrees F
            FPC 0 LU 0 TSen                OK         40 degrees C / 104 degrees F
            FPC 0 LU 0 Chip                OK         52 degrees C / 125 degrees F
            FPC 0 MQ 0 TSen                OK         40 degrees C / 104 degrees F
            FPC 0 MQ 0 Chip                OK         49 degrees C / 120 degrees F
            FPC 1 Intake                   OK         30 degrees C / 86 degrees F
            FPC 1 Exhaust A                OK         35 degrees C / 95 degrees F
            FPC 1 Exhaust B                OK         34 degrees C / 93 degrees F
            FPC 1 LU 0 TCAM TSen           OK         40 degrees C / 104 degrees F
            FPC 1 LU 0 TCAM Chip           OK         41 degrees C / 105 degrees F
            FPC 1 LU 0 TSen                OK         40 degrees C / 104 degrees F
            FPC 1 LU 0 Chip                OK         51 degrees C / 123 degrees F
            FPC 1 MQ 0 TSen                OK         40 degrees C / 104 degrees F
            FPC 1 MQ 0 Chip                OK         46 degrees C / 114 degrees F
            FPC 2 Intake                   OK         30 degrees C / 86 degrees F
            FPC 2 Exhaust A                OK         35 degrees C / 95 degrees F
            FPC 2 Exhaust B                OK         34 degrees C / 93 degrees F
            FPC 2 LU 0 TCAM TSen           OK         40 degrees C / 104 degrees F
            FPC 2 LU 0 TCAM Chip           OK         40 degrees C / 104 degrees F
            FPC 2 LU 0 TSen                OK         40 degrees C / 104 degrees F
            FPC 2 LU 0 Chip                OK         52 degrees C / 125 degrees F
            FPC 2 MQ 0 TSen                OK         40 degrees C / 104 degrees F
            FPC 2 MQ 0 Chip                OK         45 degrees C / 113 degrees F
            FPC 3 Intake                   OK         30 degrees C / 86 degrees F
            FPC 3 Exhaust A                OK         34 degrees C / 93 degrees F
            FPC 3 Exhaust B                OK         33 degrees C / 91 degrees F
            FPC 3 LU 0 TCAM TSen           OK         39 degrees C / 102 degrees F
            FPC 3 LU 0 TCAM Chip           OK         41 degrees C / 105 degrees F
            FPC 3 LU 0 TSen                OK         39 degrees C / 102 degrees F
            FPC 3 LU 0 Chip                OK         48 degrees C / 118 degrees F
            FPC 3 MQ 0 TSen                OK         39 degrees C / 102 degrees F
            FPC 3 MQ 0 Chip                OK         46 degrees C / 114 degrees F
            FPC 4 Intake                   OK         30 degrees C / 86 degrees F
            FPC 4 Exhaust A                OK         36 degrees C / 96 degrees F
            FPC 4 Exhaust B                OK         34 degrees C / 93 degrees F
            FPC 4 LU 0 TCAM TSen           OK         40 degrees C / 104 degrees F
            FPC 4 LU 0 TCAM Chip           OK         42 degrees C / 107 degrees F
            FPC 4 LU 0 TSen                OK         40 degrees C / 104 degrees F
            FPC 4 LU 0 Chip                OK         51 degrees C / 123 degrees F
            FPC 4 MQ 0 TSen                OK         40 degrees C / 104 degrees F
            FPC 4 MQ 0 Chip                OK         46 degrees C / 114 degrees F
            FPC 5 Intake                   OK         31 degrees C / 87 degrees F
            FPC 5 Exhaust A                OK         35 degrees C / 95 degrees F
            FPC 5 Exhaust B                OK         34 degrees C / 93 degrees F
            FPC 5 LU 0 TCAM TSen           OK         41 degrees C / 105 degrees F
            FPC 5 LU 0 TCAM Chip           OK         42 degrees C / 107 degrees F
            FPC 5 LU 0 TSen                OK         41 degrees C / 105 degrees F
            FPC 5 LU 0 Chip                OK         54 degrees C / 129 degrees F
            FPC 5 MQ 0 TSen                OK         41 degrees C / 105 degrees F
            FPC 5 MQ 0 Chip                OK         44 degrees C / 111 degrees F
      Fans  Top Rear Fan                   OK         Spinning at normal speed
            Bottom Rear Fan                OK         Spinning at normal speed
            Top Middle Fan                 OK         Spinning at normal speed
            Bottom Middle Fan              OK         Spinning at normal speed
            Top Front Fan                  OK         Spinning at normal speed
            Bottom Front Fan               OK         Spinning at normal speed
      

    Published: 2013-04-02