What is "oc_usd" Process on Cisco Nexus 7k and how to solve

Question

We have high CPU load on Cisco nexus 7K. The reason is "oc_usd" process. Anyone knows anything about the process and how can we solve the issue?

Answer 1

The Octopus process relates to some internal ASICs. As for issue resolution, What changed? Could be a misconfiguration, software bug, bad hardware, etc. Use basic troubleshooting to narrow down possibilities. Opening a Cisco TAC case is a good initial step as well. Look at control plane policing as well as a possible fix.

Cisco's Nexus 7000 High CPU Usage Troubleshooting Guide Root Cause Analysis of High CPU Usage states:

Symptoms of high CPU usage include control plane instability, data plane connectivity issues caused by control plane failure, protocol flapping such as Hot Standby Router Protocol (HSRP)/RP flapping, UDLD error disabling, Spanning Tree Protocol (STP) failure, and other connectivity issues.

show processes cpu history Command

If the switch was not reloaded or switched over, run the show processes cpu history command within 72 hours of the outage in order to see if high CPU usage occurred at the time of the event.

CoPP and HWRL

If high CPU usage was the root cause of a past outage, and if you suspect that the outage was triggered by network traffic, you can use CoPP and HWRL (hardware rate limiter) in order to help identify the type of traffic.