I am getting high CPU usage on my 1550-P, I have three VLAN's on this switch and the switch is providing DHCP. I have a hardware ACL on VLAN 10. I noticed the issue when i was pinging the switch interface itself 192.168.1.2, my router is a 4140 at address 192.168.1.1. if I ping 192.168.1.2, the ping times seem to be higher than normal 38ms up to 68 and they are erratic. if i ping 192.168.1.1 or other devices its 1ms. The config is attached if any one has any ideas it would be appreciated. adtran-support
Surprisingly, the word "idle" means that the CPU is idle. 
It's only busy when it isn't idle, so the actual CPU load is 100% - 71.64% or 28.36%.
Pinging TO a switch is a very low priority process compared to pinging THROUGH a switch. Network equipment is optimized to pass traffic through the device and not to terminate traffic. It sounds to me as if it's working properly.
Jayh, After looking at that again and you pointing that out idle means idle, my eyes were so drawn to the 71.64% i never considered it that way thank you for clarifying and for looking at my config. 
