We've got several remote sites that have a 3500XL switch running 12.0 (5)WC17 as the core of their network. All of them are showing cpu utilization around 35-55% pretty much constantly. Does this have a large impact on performance?
My memories of 2924-XL switches suggest the XL series are quite normal in this respect. Our 2924-XL's used to sit at around 30% most of the time, regardless of the traffic passing the device. I suspect this is normal behaviour for yours. When we moved to 2950's, 3560's they all ran lower than that, around 5% load.
I think 35-55% is pretty good,because forwarding the packets takes much amount of process but we need to check the logs. could you provide processess cpu result and the logs as well. so that we can isolate where the problem is.