Juniper MX204 - Page 120

For optimum cooling, verify the condition of the fans.
Action
•
Monitor the status of the fans. A fan module contains multiple fans that work in unison to cool the router
components. If one fan fails, the router 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 module 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 CB 0 Top Right Inlet Sensor OK 35 degrees C / 95 degrees F
CB 0 Top Left Inlet Sensor OK 38 degrees C / 100 degrees F
CB 0 Top Right Exhaust Sensor OK 45 degrees C / 113 degrees F
CB 0 Top Left Exhaust Sensor OK 64 degrees C / 147 degrees F
CB 0 CPU Core-0 Temp OK 49 degrees C / 120 degrees F
CB 0 CPU Core-1 Temp OK 49 degrees C / 120 degrees F
CB 0 CPU Core-2 Temp OK 48 degrees C / 118 degrees F
CB 0 CPU Core-3 Temp OK 49 degrees C / 120 degrees F
CB 0 CPU Core-4 Temp OK 49 degrees C / 120 degrees F
CB 0 CPU Core-5 Temp OK 48 degrees C / 118 degrees F
CB 0 CPU Core-6 Temp OK 48 degrees C / 118 degrees F
CB 0 CPU Core-7 Temp OK 48 degrees C / 118 degrees F
FPC 0 EA0_HMC0 Logic die OK 81 degrees C / 177 degrees F
FPC 0 EA0_HMC0 DRAM botm OK 78 degrees C / 172 degrees F
FPC 0 EA0_HMC1 Logic die OK 85 degrees C / 185 degrees F
FPC 0 EA0_HMC1 DRAM botm OK 82 degrees C / 179 degrees F
FPC 0 EA0 Chip OK 93 degrees C / 199 degrees F
FPC 0 EA0-XR0 Chip OK 69 degrees C / 156 degrees F
FPC 0 EA0-XR1 Chip OK 73 degrees C / 163 degrees F
Power PEM 0 ok
PEM 1 OK 49 degrees C / 120 degrees F
Fans Fan Tray 0 Fan 0 OK Spinning at normal speed
Fan Tray 0 Fan 1 OK Spinning at normal speed
Fan Tray 1 Fan 0 OK Spinning at normal speed
Fan Tray 1 Fan 1 OK Spinning at normal speed
Fan Tray 2 Fan 0 OK Spinning at normal speed
Fan Tray 2 Fan 1 OK Spinning at normal speed
SEE ALSO
123