While checking:

sh proc cpu history

there is high CPU utilization which occurs at a particular time.

closed as too broad by Ron Maupin Aug 7 '17 at 17:47

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What is driving CPU usage in a Cisco switch is probably not a single end-device. Cisco switches can normally handle a full switching load without driving the CPU utilization unusually high. This is because the switching is largely handled in hardware.

The most likely cause is a service or protocol which the switch needs to handle in software. You didn't include the show processes cpu output, switch model, IOS version, and configuration. Without those, it is merely a guessing game.

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