Description

SRX4300 RE CPU is on High Temperature reading 


Symptoms

A.Routing Engine on High CPU temp 

root@a15-45> show chassis routing-engine 
Routing Engine status:
    CPU temperature             76 degrees C / 168 degrees F  >>>>>>>HERE

B. CB 0 CPU reading

root@a15-45> show chassis environment 
Class Item                           Status     Measurement
Temp  CB 0 TMP75 Exhaust Right       OK         32 degrees C / 89 degrees F
      CB 0 TMP75 Inlet Right         OK         30 degrees C / 86 degrees F
      CB 0 TMP75 Exhaust Left        OK         32 degrees C / 89 degrees F
      CB 0 TMP75 Inlet Left          OK         28 degrees C / 82 degrees F
      CB 0 CPU                       OK         76 degrees C / 168 degrees F >>>>>>>>HERE
      CB 0 NVME SSD 0                OK         34 degrees C / 93 degrees F
      CB 0 NVME SSD 1                OK         35 degrees C / 95 degrees F
      CB 0 Mem DDR4 DIMM 0           OK         33 degrees C / 91 degrees F
      CB 0 Mem DDR4 DIMM 1           OK         32 degrees C / 89 degrees F
      CB 0 Mem DDR4 DIMM 2           OK         33 degrees C / 91 degrees F
      CB 0 Mem DDR4 DIMM 3           OK         32 degrees C / 89 degrees F
      FPC 0 BCM TD3-X5 Temp          OK         39 degrees C / 102 degrees F

C. Fan is working on normal speed which indicates no overheating

Fans  Fan Tray 0 Fan 0               OK         Spinning at normal speed
      Fan Tray 1 Fan 0               OK         Spinning at normal speed
      Fan Tray 2 Fan 0               OK         Spinning at normal speed
      Fan Tray 3 Fan 0               OK         Spinning at normal speed
      Fan Tray 4 Fan 0               OK         Spinning at normal speed
      Fan Tray 5 Fan 0               OK         Spinning at normal speed

D. The reading is under the threshold

root@a15-45> 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
CB 0 TMP75 Exhaust Right                  45    50       65       65       70       70         75
CB 0 TMP75 Inlet Right                    33    38       54       54       60       60         65
CB 0 TMP75 Exhaust Left                   46    50       65       65       70       70         75
CB 0 TMP75 Inlet Left                     42    47       62       62       68       68         72
CB 0 CPU                                  78    85       94       94       96       96         98 >>>>>>>HERE
CB 0 NVME SSD 0                           50    55       80       80       85       85         90
CB 0 NVME SSD 1                           50    55       80       80       85       85         90
CB 0 Mem DDR4 DIMM 0                      45    50       80       80       85       85         90
CB 0 Mem DDR4 DIMM 1                      45    50       80       80       85       85         90
CB 0 Mem DDR4 DIMM 2                      45    50       80       80       85       85         90
CB 0 Mem DDR4 DIMM 3                      45    50       80       80       85       85         90
FPC BCM TD3-X5 Temp                       52    57       90       90      110      110        113

 

Solution

This temperature reading is per design and it is not overheating or any indication of external environmental concerns.

Modification History

2025-04-18 : Article Created