ASR 920 CPU Temperature beyond 70 C.

[s.lachica]

ASR 920 CPU Temperature is beyond 70 C but is showing as normal. Can someone verify if this is really normal or what are the thresholds? CPU util is very low (3%).

Thanks!

[kka · Accepted solution]

Checked several of our ASR-920-4SZ-A, none has a CPU temp above 60°C.

Typically CPU temperature is some 20°C above Inlet temperature.

Keep in mind the ASR 920 is specified for extended operating environment:

    -40ºC to +70ºC, up to 1,000 feet (300m)

70°C CPU temperature is well below the minor threshold of 105°C:

asr920#sh env all | e VADM
Sensor List: Environmental Monitoring
Sensor Location State Reading
Temp: Outlet1 R0 Normal 57 Celsius
Temp: Outlet2 R0 Normal 48 Celsius
Temp: CPU R0 Normal 54 Celsius
Temp: CYLON R0 Normal 73 Celsius
Temp: Inlet R0 Normal 35 Celsius
Temp: FC PWM R0 Fan Speed 25% 35 Celsius
Hot-Swap Iin R0 Normal 4260 mA

asr920#sh env table "Temp: CPU"
Sensor State Table: Environmental Monitoring
Sensor: Temp: CPU Location: R0
Current State: Normal Reading: 55 Celsius
0-Normal Low:-2147483647 High:104 Margin:0
Action:NONE Alarm:NONE
Poll:60000 Reminder:3600000
1-Minor Low:105 High:109 Margin:0
Action:RECORD Alarm:MINOR
Poll:60000 Reminder:3600000
2-Major Low:110 High:114 Margin:0
Action:RECORD Alarm:MAJOR
Poll:60000 Reminder:3600000
3-Critical Low:115 High:119 Margin:0
Action:RECORD Alarm:CRITICAL
Poll:60000 Reminder:3600000
4-Shutdown Low:120 High:2147483647 Margin:0
Action:SHUTDOWN Alarm:CRITICAL
Poll:60000 Reminder:3600000

[kanchwalaliasgar]

Temp: CYLON R0 Normal 73 Celsius

What is function of CYLON and what should be temp threshold for it?