Maintaining the MX240 Fan Tray
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 router 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 environmentTemp PEM 0 OK 45 degrees C / 113 degrees F PEM 1 OK 45 degrees C / 113 degrees F PEM 2 Absent PEM 3 Absent Routing Engine 0 OK 42 degrees C / 107 degrees F Routing Engine 1 Present CB 0 Intake OK 40 degrees C / 104 degrees F CB 0 Exhaust A OK 37 degrees C / 98 degrees F CB 0 Exhaust B OK 42 degrees C / 107 degrees F CB 0 ACBC OK 41 degrees C / 105 degrees F CB 0 SF A OK 49 degrees C / 120 degrees F CB 0 SF B OK 44 degrees C / 111 degrees F CB 1 Intake OK 39 degrees C / 102 degrees F CB 1 Exhaust A OK 37 degrees C / 98 degrees F CB 1 Exhaust B OK 42 degrees C / 107 degrees F CB 1 ACBC OK 40 degrees C / 104 degrees F CB 1 SF A OK 49 degrees C / 120 degrees F CB 1 SF B OK 43 degrees C / 109 degrees F FPC 1 Intake OK 33 degrees C / 91 degrees F FPC 1 Exhaust A OK 39 degrees C / 102 degrees F FPC 1 Exhaust B OK 52 degrees C / 125 degrees F FPC 1 I3 0 TSensor OK 50 degrees C / 122 degrees F FPC 1 I3 0 Chip OK 54 degrees C / 129 degrees F FPC 1 I3 1 TSensor OK 47 degrees C / 116 degrees F FPC 1 I3 1 Chip OK 50 degrees C / 122 degrees F FPC 1 I3 2 TSensor OK 46 degrees C / 114 degrees F FPC 1 I3 2 Chip OK 49 degrees C / 120 degrees F FPC 1 I3 3 TSensor OK 43 degrees C / 109 degrees F FPC 1 I3 3 Chip OK 48 degrees C / 118 degrees F FPC 1 IA 0 TSensor OK 48 degrees C / 118 degrees F FPC 1 IA 0 Chip OK 49 degrees C / 120 degrees F FPC 1 IA 1 TSensor OK 45 degrees C / 113 degrees F FPC 1 IA 1 Chip OK 50 degrees C / 122 degrees F FPC 2 Intake OK 33 degrees C / 91 degrees F FPC 2 Exhaust A OK 40 degrees C / 104 degrees F FPC 2 Exhaust B OK 54 degrees C / 129 degrees F FPC 2 I3 0 TSensor OK 52 degrees C / 125 degrees F FPC 2 I3 0 Chip OK 54 degrees C / 129 degrees F FPC 2 I3 1 TSensor OK 49 degrees C / 120 degrees F FPC 2 I3 1 Chip OK 50 degrees C / 122 degrees F FPC 2 I3 2 TSensor OK 48 degrees C / 118 degrees F FPC 2 I3 2 Chip OK 51 degrees C / 123 degrees F FPC 2 I3 3 TSensor OK 44 degrees C / 111 degrees F FPC 2 I3 3 Chip OK 46 degrees C / 114 degrees F FPC 2 IA 0 TSensor OK 49 degrees C / 120 degrees F FPC 2 IA 0 Chip OK 50 degrees C / 122 degrees F FPC 2 IA 1 TSensor OK 48 degrees C / 118 degrees F FPC 2 IA 1 Chip OK 52 degrees C / 125 degrees F Fans Front Fan OK Spinning at intermediate-speed Middle Fan OK Spinning at intermediate-speed Rear Fan OK Spinning at intermediate-speed
