[c-nsp] High CPU on 3750G-24-TS

[Marian Ďurkovič]

On Wed, Nov 12, 2008 at 11:48:00AM +0000, William wrote:
> We currently use ip igmp join-group x.x.x.x under the vlan interface.

This is exactly the problem. "ip igmp join-group" causes all multicast
packets for this group to be forwarded also to the CPU.

You need to use "ip igmp static-group" instead - then the packets are
only forwared to the specified interface, but not copied to the CPU. 



   With kind regards,

          M.