HIgh CPU utilization

[rj.kapildev]

Dear Friends,

We can find the high CPU utilization on our l2 catOS 4506 switch, we are hitting with the syslog as "Invalid traffic from multicast source address 08:00:01:02:00:00 on port 1/1" 

Does this syslog message relates to the high CPU ?? 

Kindly assist in resolving this, thanks in advance

[LJ Gabrillo]

High CPU can be pretty hard to trace
Typically, it is caused by network looping

Do you have any mac-address flap messages in your switch?
If not kindly check if logging of mac-flaps is enabled by:

#config t

#mac address-table notification mac-move

If there are flaps, there is definitely a loop in your network

Oh yeah, if you are in a telnet session don't forget to do "terminal monitor" to see the informational logs popping up