Hi Senthil,
As per the output Cat4k Mgmt LoPri ,Cat4k Mgmt HiPri and STP is taking
high CPU utilization in your switch:-
In order to see which of the platform-specific processes use the CPU under
the context of Cat4k Mgmt HiPri and Cat4k Mgmt LoPri , issue the show
platform health command.
Each of the platform-specific processes has a target/expected utilization
of the CPU. When that process is within the target, the CPU executes the
process in the high-priority context. The show processes cpu command
output counts that utilization under Cat4k Mgmt HiPri . If a process
exceeds the target/expected utilization, that process runs under the
low-priority context. The show processes cpu command output counts that
additional utilization under Cat4k Mgmt LoPri . This Cat4k Mgmt LoPri is
also used to run background and other low-priority processes, such as
consistency check and reading interface counters. This mechanism allows
the CPU to run high-priority processes when necessary, and the idle CPU
cycles that remain are used for the low-priority processes. To exceed the
target CPU utilization by a small amount, or a momentary spike in
utilization, is not an indication of a problem that needs investigation.
Check out the below link on troubleshootinh high CPU in 4500 switches
http://www.cisco.com/en/US/products/hw/switches/ps663/products_tech_note09186a00804cef15.shtml
Note :- Do not shut any port channel in production network,just check the
mac-address which is getting flapped between the portchannel.
Hope to Help !!
Ganesh.H
