12-26-2007 06:07 AM - edited 03-03-2019 08:03 PM
Hi,
I have six 3550 switch connected in a cascading manner. But out of six switchs 3 switchs have nearly 60% CPU utilization. Please find the attached show tech file. Please help me to resovle the issue.
12-26-2007 07:35 AM
I dont think you should worry. The normal CPU range for the XL series is 30-80%
The 91% may be seen when you executed the sh tech command.
Also have a look at the following links
http://www.cisco.com/en/US/products/hw/switches/ps607/products_tech_note09186a0080094e78.shtml
http://www.cisco.com/en/US/products/hw/switches/ps607/products_tech_note09186a0080094e78.shtml
HTH
Narayan
12-26-2007 08:45 AM
Hi,
Thanks for promt reply.
But other 3 switches have 10% cpu utilization and other 3 switches have 60% utilitzation.
12-27-2007 07:32 AM
Are all 6 running the same IOS version? Also I had a similar problem with 2 switches and I update the IOS to the latest on just one and it fixed the CPU problem, your IOS seems quite old, might be worth updating on just one of them.
12-28-2007 03:16 AM
Hi,
First of all, your switch is not 3550. 3550 is not XL series, your switches are 3548XL.
Your IOS is affected by the bug regarding high-cpu utilization for "Router AutoConf Process" (Bug ID: CSCdv21552). Though from the "show proc cpu" there is no indication that your high-cpu utilization is cause by this bug, if you have an active maintenance, it will not hurt to update the IOS.
I noticed that you put "spanning-tree portfast" in all if not most of your physical interfaces. Make sure that non of them is connected to a hub, switch, or routers - otherwise you will create a network loop and will cause high-cpu utilization. "spanning-tree portfast" setting for the physical interface is recommended only if the interface is connected to a host.
Anything from the logs?
Regards,
Dandy
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