> > I've captured some packets using tcpdump, and indeed, I never see the
> > multicast traffic being received, only sent.  The odd thing is that 
these
> > machines respond to other multicast traffic, like pinging 224.0.0.1.
> >
> > Is there a kernel option that anyone is aware of that could be causing 
the
> > boxes to drop multicast?
> >
> > Thanks,
> > Justin

> I'd have a serious word with your network guys.

> Show them your tcpdumps and they hopefully will understand.


I think this is the issue.  It sounds like we're carrying multicast 
traffic only on vlan 1, but this switch doesn't carry that vlan.  They're 
looking into a cisco option called "MVR" that will get the multicast 
traffic to the correct switch ports.

Thanks for your help,
Justin

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