topic Re: Cisco 4900M high CPU utilization in Switching

Cisco 4900M high CPU utilization

nir.antebi.85 — Wed, 06 Mar 2019 23:01:16 GMT

Hi,

I have a Cisco 4900M series, and every once and a while (~2 hours), the CPU reach more than 80% for less than 10 seconds.

This causes the HSRP packets to be dropped / not be sent at all from the Cisco which resolves in Active Active state in the network.

After a brief analyze we've found that this proccess ID: galiosobflfilesy. PID:69.

Can someone please help in identifying what exactly this process do?

Meanwhile, to overcome the HSRP issue, we've increased the HSRP timers.

Thank you for your help.

Re: Cisco 4900M high CPU utilization

Shashank Singh — Sun, 16 Jan 2011 17:51:14 GMT

Hi,

GaliosObflFilesys process periodically writes OBFL (onboard failure logging) data to the system flash, recording historical temperature data and any significant system events.

'debug logging onboard fs' will tell you the module on which the OBFL logging is happening. 'sh plat soft obfl mod all' may be helpful too.

You can try disabling logging by issuing 'no hw-module mod X logging onboard' where X is the concerned module. IOS 12.2(53)SG2 or a later release includes optimisations to the GaliosObflFilesys to avoid blocking for any significant period of time and can be effective in resolving the CPU utilization in this case.

Hope this helps,

Shashank

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Re: Cisco 4900M high CPU utilization

nir.antebi.85 — Sun, 16 Jan 2011 18:17:31 GMT

Hi Shashank,

Thanks for the quick prompt!

I another question regarding what you've posted - do you know what is the impact when removing the logging from the C4900? 'no hw-module mod X logging onboard' - and for what they were made off in the first place (are they important or can be removed?)

Thanks again!

Re: Cisco 4900M high CPU utilization

Shashank Singh — Mon, 17 Jan 2011 01:01:35 GMT

Hi,

The Onboard Failure Logging (OBFL) feature collects data such as operating temperatures, hardware uptime, interrupts, and other important events and messages from system hardware installed in a Cisco router or switch. The data is stored in nonvolatile memory and helps technical personnel diagnose hardware problems.

Logs collected by this process can be seen by doing 'show logging onboard' on the device.

Removing onboard logging will not impact performance or traffic forwarding in any way as this is purely for troubleshooting and diagnosis purposes.

Hope this helps.

Shashank

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Re: Cisco 4900M high CPU utilization

nir.antebi.85 — Mon, 17 Jan 2011 16:04:33 GMT

Hi Shashank,

Many thanks for you help!!

We are currently working on it - Will update you, Thanks again!