Symptom

Catalyst 3650/3850 switches (stack or standalone) may report following symptoms: - CPU usage of Core 0 is in the range of 90 - 100% - "fed" and its subprocess "fed-ots-main" are high even with not much traffic sent to the cpu - Check the cpu queues by command "show platform punt statistics port-asic 0 cpuq -1 direction rx", forus queue (RXQ 2: CPU_Q_FORUS_TRAFFIC) increase repidly (E.g., by 100 every few seconds) - Packets punt to cpu (captured with Wireshark) indicate normal traffic.

Conditions

Issue is only seen with Catalyst 3650/3850 running releases 3.7.0E,3.7.1E,3.7.2E,3.7.3E

Workaround

Reload the device(s) in issue.

Further Problem Description