I have 3x Cisco 2960-S Switches stacked. The switch stack shows constant high CPU of 80%. Even on weekends when there is no-one in the office CPU usage never drops below 80%. Users complain intermittently about “slow Internet access”
I have attached the output of some show commands. I’m not really sure what the problem is?
show controllers cpu-interface shows a high number of invalid STP frames?
Is there something wrong with spanning tree or a loop in the network?
I would appreciate some expert helping finding the cause of this problem.