Cisco Support Community
Showing results for 
Search instead for 
Did you mean: 

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. And see here for current known issues.

New Member

High CPU utilsation on PIX-525E.

New Member

Re: High CPU utilsation on PIX-525E.

We are running 6.3(5) on Primary and Standby PIX. Due to high CPU utilsation the keepalives between primary and backup are lost for a short while and regained. This is reported by our SYSLOG server.

Around the same time users complain of short disconnectivity issue to the servers through the Firewall.Between 10 and 100 in the morning utilisation reaches 100%.

I am looking for URL or Pointers on how to troubleshoot high CPU utilisation problem on PIX.

Can the process causing the high CPU be detected as in IOS based routers by doing a SHOW TECH?

Cisco Employee

Re: High CPU utilsation on PIX-525E.

Typical reasons for high CPU on Pix include verbose logging, viruses, or many concurrent connections. Have you noticed a pattern as to when the issue occurs? Is it during peak time? When did the issue first start? If you attach a show tech (please sanitize config) I'll take a look.


Re: High CPU utilsation on PIX-525E.

Try doing a

sh xlate

and see how many translations you have. Excessive translations (virus/worm, file-sharing, etc.) can cause issues.

Hope this helps.

Re: High CPU utilsation on PIX-525E.

"show conn count" is a good one.

If it's high then log to file, set pager 0 and go for "show local" to find the culprit.

CreatePlease login to create content