High CPU Usage WS-C3560G-24TS

[vinesman]

Hello,

I have just added a network to my layer 3 switch. The new network is doing multicast, and I beleive that is what is causing high CPU usage. When i disconnect the network from the port, CPU goes down. 

I do not see any packet drops, no queues maxed out, no reason for the high CPU basically. Below is a diagram of the network.

Attached are some outputs from basic troubleshooting

Let me know if more information is needed.

[Leo Laohoo]

And what is the exact IOS version is the switch running on?

[vinesman]

Switch Ports Model SW Version SW Image
------ ----- ----- ---------- ----------
* 1 28 WS-C3560G-24TS 12.2(55)SE10 C3560-IPBASEK9-M

[vinesman]

Could it be the switch is not able to handle multicast?

Doing some more research, I am seeing the bod hop counter go up pretty quickly.

#sh ip traffic | i bad hop
3179 format errors, 0 checksum errors, 8098138 bad hop count
#sh ip traffic | i bad hop
3179 format errors, 0 checksum errors, 8098146 bad hop count
#sh ip traffic | i bad hop
3179 format errors, 0 checksum errors, 8098147 bad hop count
#sh ip traffic | i bad hop
3179 format errors, 0 checksum errors, 8098149 bad hop count
#sh ip traffic | i bad hop
3179 format errors, 0 checksum errors, 8098151 bad hop count
#sh ip traffic | i bad hop
3179 format errors, 0 checksum errors, 8098155 bad hop count
#sh ip traffic | i bad hop
3179 format errors, 0 checksum errors, 8098157 bad hop count
#sh ip traffic | i bad hop
3179 format errors, 0 checksum errors, 8098158 bad hop count
#sh ip traffic | i bad hop
3179 format errors, 0 checksum errors, 8098161 bad hop count
#sh ip traffic | i bad hop
3179 format errors, 0 checksum errors, 8098161 bad hop count

Could this mean I need to increase the TTL on the multicast packet?

Thanks