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High CPU Utilization

heidemat01
Level 1
Level 1

‎07-26-2006 11:35 PM - edited ‎03-03-2019 04:15 AM

I have a Cat 4506 with IOS and a High CPU Utilization. The show proc cpu command shows me, that the PM Callback process use the most cpu time. What is the PM Callback process ?

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Roberto Salazar
Level 8
Level 8

‎07-26-2006 11:57 PM

The "PM callback" process is an internal process

dealing with Port Management. Enable "logging event link-status" on all of the interfaces to see if you have an interface that is flapping rapidly or contantly. In addition, what is the switch's CPU? this platform is quite normal to see a 60% CPU Utilization since all packets are hardware switch, it is even normal that they spike to 99% occasionally.

CPU Util on cat4000 running CatOS:

http://www.cisco.com/warp/customer/473/82.html

High CPU Utilization on Cisco IOS Software-Based Catalyst 4500 Switches:

http://www.cisco.com/en/US/products/hw/switches/ps663/products_tech_note09186a00804cef15.shtml

Both of the link above are very useful in torubleshooting high CPU on Cat4000.

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