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Webcast-Catalyst9k
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CAT-4507 CPU levels

What is an acceptable level for the 2 values below as seen by the command "show processes cpu history" before switch performance is impacted?

1. --> * = maximum CPU%

2. --> # = average CPU%

Thanks,

RJ

1 REPLY
Cisco Employee

Re: CAT-4507 CPU levels

Hi RJ,

Max CPU can spike to 99 or 100% utilization in normal usage occasionally, but if it happens often, it is probably indicative of a problem.

Average CPU for the 4500 series switches ranges from 20-40% or higher even when completely idle. Depending on the features enabled and type and amount of traffic going through the switch, your average range could be anywhere.

Here's a good doc on understanding CPU utilization on the 4500 series switches:

http://www.cisco.com/en/US/products/hw/switches/ps663/products_tech_note09186a00804cef15.shtml

HTH,

Bobby

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