[c-nsp] IGMP on 6500s - %MCAST-xx-GC_LIMIT_EXCEEDED

[Tim Stevenson]

Phil - curious if there is any update on this? I did find a couple 
bugs that may be related. What software release are you running, and 
is there a redundant sup in the system? Are the syslogs referring to 
the standby sup?

Thanks,
Tim

At 10:22 AM 9/13/2006 +0100, Phil Mayers mumbled:
>Phil Mayers wrote:
> > Tim Stevenson wrote:
> >> It refers to Layer 2 group MAC entries (try sh mac- mul ig or sh
> >> multicast group); these are driven by IGMP join activity in host VLANs.
> >
> > Although the message refers to IGMP, is it possible that MLD is
> > implicated? "sh mac- mul mld" gives several 3333.0000.00xx groups per
> > vlan (even though no IPv6 address is defined on those vlans) and then
> > weirdly lists all active output interfaces for the 3333.0000.000d group
> > for each vlan, not just the interfaces that vlan is on.
> >
> > Summing up the interfaces times vlans times groups I get ~9k, which is
> > getting in the right region for the 15k I'm seeing reported. But if so,
> > it does rather imply that MLD snooping is very broken.
> >
> > I can't come up with any other combination of multicast
> > groups/sources/interfaces that gets even close to being what the error
> > indicates.
>
>For what it's worth, disabling mld snooping did not help. I'm going to
>open a TAC case, thanks for the comments all.
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Tim Stevenson, tstevens at cisco.com
Routing & Switching CCIE #5561
Technical Marketing Engineer, Catalyst 6500
Cisco Systems, http://www.cisco.com
IP Phone: 408-526-6759
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