IGMP Snooping on VPLS

"Venkatesh Sriram" <[email protected]> Wed, 3 Dec 2008 08:50:31 +0530
Newsgroups gmane.ietf.magma
Message-ID <[email protected]>
Hi,

I was reading RFC 4541 and i have a few doubts. I would really
appreciate if somebody could help me clear those.

According to Section 2.1.11 - "A snooping switch should forward IGMP
Membership Reports only to those ports where multicast routers are
attached."

I understand that this would mean that a snooping switch should send
all IGMP Membership Reports that it receives from its customer ports
on to the pseudowire (PW) that connects this switch to the other PE
routers. Is this correct?

According to 2.1.2.  Data Forwarding Rules - " 1) Packets with a
destination IP address outside 224.0.0.X which are not IGMP should be
forwarded according to group-based port membership tables and must
also be forwarded on router ports."

Does this mean that a snooping switch should forward packets with dest
IP outside 224.0.0.X (which are not IGMP) only on the ports over which
it has recvd a prior IGMP report + the PW that conects it to other PE
routers?

Thank You,

Sriram