[f-nsp] multicast and GRE

[harbor235]

Does anyone know if Brocade/Foundry supports multicast over GRE tunnels?

My setup is simple, L2 access switch connected to distribution switch (L3),
conencted
to a Core switch (L3). If I hang the source off the Core, enable PIM on the
connencting interfaces
all works well. If I add a GRE tunnel that terminates upstream of the core
switch to remote router,
add the appropriate PIM sparse mode commands on the tunnel interfaces and
locate the source
on the same remote router, all is broken. If I follow the Cisco docs for
enabling multicast
over GRE, add mroutes for the RP and the source pointing to the tunnel, I
still get no joy.

I can see the group address and the RP in the PIM cache as well IGMP. I have
performed packet traces
and can see IGMP V2 requests, creates, etc. Then pretty much 23 seconds
later I see the XP receiver
send a IGMP leave, thoughts?

Are there any good docs for Foundry multicast over GRE? Troubleshooting?
help from someone who has
implemented multicast on Foundry?

harbor235 ;}
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