We had two Cisco 3845 peg out at 100% CPU usage last weekend. We resolved the problem, but since then, polling data had not been updating for either router. I installed 9.1 SP4, and one router started to update. But I had to unmanage the other router's CPU and Memory Utilization to start getting updates for the other router. Doesn't any body have an explanation? Is there a way to avoid this in the future?