Maintaining the Fan Trays on the SRX5800 Services Gateway

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 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         35 degrees C / 95 degrees F
        PEM 1                          OK         35 degrees C / 95 degrees F
        PEM 2                          Absent
        PEM 3                          Absent
        Routing Engine 0               OK         37 degrees C / 98 degrees F
        Routing Engine 1               Absent
        CB 0 Intake                    OK         30 degrees C / 86 degrees F
        CB 0 Exhaust A                 OK         32 degrees C / 89 degrees F
        CB 0 Exhaust B                 OK         33 degrees C / 91 degrees F
        CB 0 ACBC                      OK         30 degrees C / 86 degrees F
        CB 0 SF A                      OK         42 degrees C / 107 degrees
        CB 0 SF B                      OK         34 degrees C / 93 degrees F
        CB 1 Intake                    Absent
        CB 1 Exhaust A                 Absent
        CB 1 Exhaust B                 Absent
        CB 1 ACBC                      Absent
        CB 1 SF A                      Absent
        CB 1 SF B                      Absent
        FPC 0 Intake                   OK         36 degrees C / 96 degrees F
        FPC 0 Exhaust A                OK         32 degrees C / 89 degrees F
        FPC 0 Exhaust B                OK         39 degrees C / 102 degrees
        FPC 0 pfe0/I3 TSensor          OK         35 degrees C / 95 degrees F
        FPC 0 pfe0/I3 Chip             OK         41 degrees C / 105 degrees
        FPC 0 pfe1/I3 TSensor          OK         35 degrees C / 95 degrees F
        FPC 0 pfe1/I3 Chip             OK         39 degrees C / 102 degrees
        FPC 0 pfe0/XLR TSensor         OK         38 degrees C / 100 degrees
        FPC 0 pfe0/XLR Chip            OK         52 degrees C / 125 degrees
        FPC 0 pfe1/XLR TSensor         OK         30 degrees C / 86 degrees F
        FPC 0 pfe1/XLR Chip            OK         51 degrees C / 123 degrees
        FPC 0 IA TSensor               OK         39 degrees C / 102 degrees
        FPC 0 IA Chip                  OK         43 degrees C / 109 degrees
        FPC 0 Forbes 0 TSensor         OK         29 degrees C / 84 degrees F
        FPC 0 Forbes 0 Chip            OK         48 degrees C / 118 degrees
        FPC 0 Forbes 1 TSensor         OK         32 degrees C / 89 degrees F
        FPC 0 Forbes 1 Chip            OK         45 degrees C / 113 degrees
        FPC 2 Intake                   OK         29 degrees C / 84 degrees F
        FPC 2 Exhaust A                OK         37 degrees C / 98 degrees F
        FPC 2 Exhaust B                OK         44 degrees C / 111 degrees
        FPC 2 I3 0 TSensor             OK         45 degrees C / 113 degrees
        FPC 2 I3 0 Chip                OK         50 degrees C / 122 degrees
        FPC 2 I3 1 TSensor             OK         43 degrees C / 109 degrees
        FPC 2 I3 1 Chip                OK         46 degrees C / 114 degrees
        FPC 2 I3 2 TSensor             OK         40 degrees C / 104 degrees
        FPC 2 I3 2 Chip                OK         46 degrees C / 114 degrees
        FPC 2 I3 3 TSensor             OK         35 degrees C / 95 degrees F
        FPC 2 I3 3 Chip                OK         39 degrees C / 102 degrees
        FPC 2 IA 0 TSensor             OK         48 degrees C / 118 degrees
        FPC 2 IA 0 Chip                OK         46 degrees C / 114 degrees
        FPC 2 IA 1 TSensor             OK         41 degrees C / 105 degrees
        FPC 2 IA 1 Chip                OK         45 degrees C / 113 degrees
  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

Note: The fan numbers are stamped into the fan tray sheet metal next to each fan.