Symptom
- Hight CPU can be seen using the command "show process cpu platform sorted".
- it is usually reported by Cisco Prime.
- The issue does not impact the switch performance, it is not cosmetic, but definely not impactful.
#show processes cpu platform sorted
CPU utilization for five seconds: 30%, one minute: 30%, five minutes: 30%
Core 0: CPU utilization for five seconds: 10%, one minute: 8%, five minutes: 9%
Core 1: CPU utilization for five seconds: 6%, one minute: 7%, five minutes: 6%
Core 2: CPU utilization for five seconds: 8%, one minute: 8%, five minutes: 7%
Core 3: CPU utilization for five seconds: 100%, one minute: 100%, five minutes: 100% <----------------- It could be any other core
Pid PPid 5Sec 1Min 5Min Status Size Name
--------------------------------------------------------------------------------
15208 14369 106% 106% 106% S 288040 fed main event <------------------
6173 5475 5% 4% 4% S 898364 linux_iosd-imag
7213 6756 3% 2% 2% S 99328 cmand
6489 5860 2% 2% 2% S 70756 sif_mgr
NOTE: Not all the "fed main events" are triggered due to the same process. Consult Cisco TAC to validte you are hitting this bug
Conditions
- Issue seen on IOS-XE 17.6.3 and 17.7.1
- Only observed on 9300 and 9300L switches so far. However all cat9*K family might be affected.
- There is not any apparent trigger.
Workaround
- This issue has not been found to be impactful to production traffic at this time.
- To reduce alarms in cisco Prime, change the OID from Cisco prime side to avoid such warnings. OID: 1.3.6.1.4.1.9.9.109.1.1.1.1.8
- To reduce alarms in other NMS apply an snmp-view to filter out OID 1.3.6.1.4.1.9.9.109.1.1.1.1.8
- These workaround will not reduce the reported CPU in the CLI of the switch at this time. There is no current workaround for reducing the reported CPU utilization in the switch.
