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

[Frank Bulk]

We did this on a Cisco 7206VXR running 12.2(26) to regain several percentage
points of CPU....definitely worth it.

Frank

-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Marian Durkovic
Sent: Wednesday, November 12, 2008 7:20 AM
To: William
Cc: cisco-nsp
Subject: Re: [c-nsp] High CPU on 3750G-24-TS

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.
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