beelze@ams-nik-er2> show chassis routing-engine
Routing Engine status:
Temperature 42 degrees C / 107 degrees F
CPU temperature 51 degrees C / 123 degrees F
DRAM 2048 MB (2048 MB installed)
Memory utilization 92 percent
User 74 percent
Background 0 percent
Kernel 22 percent
Interrupt 4 percent
Idle 0 percent
Serial ID S/N CABS8179
Start time 2018-03-31 04:11:41 CEST
Uptime 762 days, 6 hours, 51 minutes, 19 seconds
Last reboot reason Router rebooted after a normal shutdown.
Load averages: 1 minute 5 minute 15 minute
4.52 4.06 3.66
I see there is SNMP configured on the device and that may consume CPU for its process.
Can you disable SNMP monitoring and manually check the CPU usage for a while?
Bulk SNMP walk is bound to increase CPU on this EX. And if we poll for a lot of data in a short time, it could spike "mgd" or CLI process as too. It's better to only probe for critical alarms/events like interface downs, chassis/system alarms, etc., work out a lesser aggressive polling interval (if you poll every 5mins, try 10mins for example) and limit to a lesser no. of commands per poll rather than bulk. Please check this out:
The best to do is stay on the recommended Junos to avoid any others, but I believe for CPU utilization spike, that's something to expect during a bulk SNMP walk. If limited polling is done for what's critical, we must be alright: