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Beginner

Cisco 6509 with SUP 720 cpu utilization is high

Hi,

From couple of weeks we have observed the cpu utilization of cisco 6509 with SUP 720 is high. During daytime from 9:00 to 21:00 it keeps increasing & reaches 98% & after 21:00 becomes normal. We are unable to find the root cause for this behaviour. Any suggestions is welcome.  Attached is show version & show proc cpu history.

Thanks,

Kiran

5 REPLIES 5

Cisco 6509 with SUP 720 cpu utilization is high

Hi Kiran,

Pls. increase memory which is 64 mb only.

65536K bytes ( of Flash internal SIMM (Sector size 512K).

Beginner

Cisco 6509 with SUP 720 cpu utilization is high

Hi Sanjeev,

Thanks for your suggestion. But how is this related to High CPU utilization?

Regards,

Kiran

Cisco 6509 with SUP 720 cpu utilization is high

I am sorry Kiran,

IT was just information.

Beginner

Cisco 6509 with SUP 720 cpu utilization is high

Hi Everyone,

Any suggestions to find the reason for high CPU.

Regards,

Kiran

Hall of Fame Expert

Re: Cisco 6509 with SUP 720 cpu utilization is high

Hello Kiran,

there was an Ask the expert event about this kind of issues

see

https://supportforums.cisco.com/message/3536828#3536828

also

http://www.cisco.com/en/US/products/hw/routers/ps133/products_tech_note09186a00800a70f2.shtml

more specific for C6500 the following:

http://www.cisco.com/en/US/products/hw/switches/ps708/products_tech_note09186a00804916e0.shtml

note:

you can use

show proc cpu sorted

to see the processes that use most resources first

Edit:

in your case most of cpu resources are taken by interrupts   ( the second number after the '/' represents interrupts)

show processes cpu

CPU utilization for five seconds: 49%/45%<<<<; one minute: 52%; five minutes: 50%

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

====> this means traffic that is process switched and sent to the cpu instead of being processed in hardware

see also

http://www.cisco.com/en/US/products/hw/routers/ps359/products_tech_note09186a00801c2af0.shtml

follow the document below it should be helpful are the slides associated to the ask the expert event

https://supportforums.cisco.com/docs/DOC-21945

Hope to help

Giuseppe

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