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CPU process Utilization on Cisco 2811

Hi all,

I am using a Cisco 2811 router at head office and getting a high CPU process values on that. Attach are the following output

sh logging

sh process cpu

sh process cpu history

sh flash

We have three gre tunnel to our other offices. For this we have one dedicated link of 1MB for VPN connections. Also all site offices are connected to internet from this head office. For this we have 2MB internet link Please tell me where is the actual problem exist. And what I should have to do to resolve this issue.


Ali Raza

Cisco Employee

Re: CPU process Utilization on Cisco 2811


From your "show process cpu" output, it looks like the router is process switching a lot of traffic, and that's what's causing the high cpu. The first step to troubleshoot this sort of problems is to get a "show int statistics" output and figure out on which interface process switching is taking place and in what direction. Some of the common reasons for process switching are access-list logging, ip re-reassembly, etc., which are pretty easy to check. However, if it's causing by something else, the troubleshooting process can get fairly involved to identify the punt path and I would suggest you open a TAC case to have it investigated at that point. Hope this helps.



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