Router CPU usage High

trackme · ‎10-31-2007

Hello,

I have a 1760 Router and whenever i checked the router CPU seems to be very high.

When there is no traffic on that router, the CPU usage is litterly zero and that means some traffic that is doing this.

When i issue a show proc cpu i get like this

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#sh proc cpu

CPU utilization for five seconds: 66%/49%; one minute: 65%; five minutes: 66%

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when i scroll down the entire table, i can see only the IP input as high

35 3461314 3482212 993 14.30% 12.75% 12.93% 0 IP Input

So wondering how come i can get 70% CPU usage since rest of them shows either zero or .001 % like .

Confused where this CPU usage shoots.

Infact i have route maps on that, but i dont see them taking that much process. Also i use route cache flow to check my traffic and i dont see any traffic causing such a high usage. All i can see is the IP input.

Is there a way where i can find which is causing this high usage or ????

guruprasadr · ‎10-31-2007

HI, [Pls Rate if HELPS]

For troubleshooting High CPU utilization problem:

Check the show output of below cmds:

show processes cpu Command

show interfaces Command

show interfaces switching Command

show interfaces stat Command

show ip nat translations

show align Command

show version Command

show log Command

Based on the Output you can easily locate the problem.

PLS RATE if HELPS

Best Regards,

Guru Prasad R

Joseph W. Doherty · ‎10-31-2007

See http://www.cisco.com/en/US/products/sw/iosswrel/ps1828/products_tech_note09186a00800a65d0.shtml for an explanation of the show proc cpu command.

Addition of all the process CPU loads would be about the difference between the total five second load and the interrupt load. For instance, in your example you have 66%/49%, a difference of 17%.

See http://www.cisco.com/en/US/products/hw/routers/ps133/products_tech_note09186a00800a70f2.shtml for troubleshooting high CPU.

To troubleshoot your high CPU for IP Input, see http://www.cisco.com/en/US/products/hw/routers/ps359/products_tech_note09186a00801c2af3.shtml

trackme · ‎10-31-2007

Hi,

These links seems to be useful, i will go through this and see what can be done to reduce the CPU utilisation