Our Cisco 4500 box shows high CPU Utilization ; no changes done on software or any hardware added.
The Box got Three modules.
1. Supervisor Engine
2. Ethernet Module 24 ports 10/100/1000
3. Fiber module 6 ports ( 5 ports used - connected to Access switches )
Any help to check what is causing the issue.
Ok , You need to draw a complete diagram showing Physical connectivity between all of your switches for people to understand and tell what links needs to be blocked by STP.
The error messages that you are seeing are :-
00:26:31: %C4K_EBM-4-HOSTFLAPPING: Host 00:0F:FE:2C:55:5A in vlan 1 is flapping between port Gi3/3 and port Gi5/13
00:26:31: %C4K_EBM-4-HOSTFLAPPING: Host 00:30:05:CC:1E:11 in vlan 1 is flapping between port Gi3/3 and port Gi2/1
which means that the switch saw same mac address Host 00:0F:FE:2C:55:5A on port gi 3/3 and gi 5/13 which means that there is a loop some where in your architecture. It similary says that it saw same mac on port Gi3/3 and port Gi2/1.