Cat4k Mgmt LoPri High cpu utilization WS-C4948

[Kapil.patil]

Seeing an high CPU Utilizatio

show processes cpu sorted 5sec

CPU utilization for five seconds: 97%/0%; one minute: 96%; five minutes: 97%

 PID Runtime(ms)   Invoked      uSecs   5Sec   1Min   5Min TTY Process

  58   8092642742142618493        377 90.87% 89.34% 89.81%   0 Cat4k Mgmt LoPri

  57  10077722312280892230          0  5.35%  5.62%  5.63%   0 Cat4k Mgmt HiPri

 166         760       583       1303  0.47%  0.06%  0.09%   1 SSH Process    

[Philip D'Ath]

There was an event on this recently!  See if you can get hold of the people still.

https://supportforums.cisco.com/event/12757091/ask-expert-troubleshooting-high-cpu-catalyst-switches

[Mark Malone]

hi

can you post the show platform health off the switch see whats causing it

This show processes cpu output shows that there are two processes that use the CPU— Cat4k Mgmt HiPri and Cat4k Mgmt LoPri . These two processes aggregate multiple platform-specific processes which perform the essential management functions on the Catalyst 4500. These processes process control plane as well as data packets that need to be software-switched or processed.

In order to see which of the platform-specific processes use the CPU under the context of Cat4k Mgmt HiPri and Cat4k Mgmt LoPri , issue the show platform health command.

[Iulian Vaideanu]

I found this extremely useful - http://www.cisco.com/c/en/us/support/docs/switches/catalyst-4000-series-switches/65591-cat4500-high-cpu.html - especially the in-built CPU sniffer mentioned at the end (debug platform packet all receive buffer).