The temperature of one or more components (Field Replaceable Units or FRUs) exceeded the indicated temperature, which is the upper of two thresholds. The fans (and impellers, if applicable) were in the indicated state. If the temperature does not go below the threshold within four minutes after the chassis process (chassisd) detects this condition, the chassisd process shuts down the routing platform. When this message was logged, the indicated number of seconds remained before shutdown.
In most cases the platform device will power down if the temperature stays above the temperature threshold for longer than four minutes and the chassisd will generate the CHASSISD_OVER_TEMP_CONDITION message. If it is an FRU component that is at fault for the high temperature, the chassisd will identify the failed FRU in the CHASSISD_OVER_TEMP_CONDITION syslog message.
Below are some examples of the message:
CHASSISD_OVER_TEMP_CONDITION: Chassis temperature over 100 degrees C (but no fan/impeller failure detected); routing platform will shutdown in 240 seconds if condition persists CHASSISD_TEMP_HOT_NOTICE: FPC 7 temperature of 106 degrees C is above limit (100 degrees) CHASSISD_OVER_TEMP_SHUTDOWN_TIME: Chassis temperature above 95 degrees C for too long (> 240 seconds); powering down all FRUs chassisd[2945]: CHASSISD_TEMP_HOT_NOTICE: SFM 1 temperature of 66 degrees C is above limit (65 degrees) chassisd[2945]: CHASSISD_OVER_TEMP_CONDITION: Chassis temperature over 65 degrees C (fan/impeller failure detected); routing platform will shutdown in 9 seconds if condition persists chassisd[2945]: CHASSISD_TEMP_HOT_NOTICE: SFM 1 temperature of 66 degrees C is above limit (65 degrees) chassisd[2945]: CHASSISD_OVER_TEMP_CONDITION: Chassis temperature over 65 degrees C (fan/impeller failure detected); routing platform will shutdown in 4 seconds if condition persists
The CHASSISD_OVER_TEMP_CONDITION can be seen when the PEMS are not recognized properly and a new device is first booted up.
The CHASSISD_OVER_TEMP_CONDITION errors can also be seen if air filters are dirty and proper air flow is obstructed.
The CHASSISD_OVER_TEMP_CONDITION can be seen when the FRU component exceeds the upper temperature of the FRU’s threshold for longer than four minutes; then the chassis powers down.
Also check the site air conditioning. Check site ambient temperature and other devices at the same site for temperature issues.
Check the device air flow for any obstructions which may block the proper airflow. If you are not sure of the proper airflow for your device you can look up the airflow requirements on the Juniper Product Site or in the Technical Documentation .
In most Junos versions you can run show chassis temperature-thresholds to view the different thresholds allowed for your FRU device.
show chassis temperature-thresholds
Fan speed Yellow alarm Red alarm
Item Normal High Normal Bad fan Normal Bad fan
Chassis default 48 54 65 55 75 65
Routing Engine 0 55 65 85 85 100 100
Routing Engine 1 55 65 85 85 100 100
If more troubleshooting or research is needed, open a case with your technical support representative. Include the output of the following commands:
show log messages show chassis temperature-thresholds show chassis environment