The RE CPU temperature may appear to be high on the branch series SRX3xx devices, but there are no temperature alarms.
{primary:node0}
mist@srx340> show chassis environment
node0:
--------------------------------------------------------------------------
Class Item Status Measurement
Temp Routing Engine OK 44 degrees C / 111 degrees F
Routing Engine CPU OK 81 degrees C / 177 degrees F
Fans SRX340 Chassis fan 0 OK Spinning at normal speed
SRX340 Chassis fan 1 OK Spinning at normal speed
SRX340 Chassis fan 2 OK Spinning at normal speed
SRX340 Chassis fan 3 OK Spinning at normal speed
Power Power Supply 0 OK
node1:
Temp Routing Engine OK 43 degrees C / 109 degrees F
Routing Engine CPU OK 69 degrees C / 156 degrees F
If we see the temperature thresholds, they appear to imply anything over 60 should give an alarm.
root@srx340> show chassis temperature-thresholds
Fan speed Yellow alarm Red alarm Fire Shutdown
(degrees C) (degrees C) (degrees C) (degrees C)
Item Normal High Normal Bad fan Normal Bad fan Normal
Chassis default 35 56 60 40 75 65 100
Routing Engine 35 56 60 40 75 65 100
However, we see no alarms active.
root@srx340> show chassis alarms
No alarms currently active
The RE CPU temperature on the devices above are within normal tolerances.
The temperature-thresholds are in reference to the chassis temperature and routing engine temperature, and not the temperature of the CPU itself.
The SRX3xx use passive cooling on the CPUs along with chassis fans. The CPUs may report higher temperatures than what one might might see in other SRX platforms.