MLD-snooping switches is the biggest reason.

Brian

Siva Veerepalli wrote:
RFC2710 (MLD) states that when a General Membership Query is received, a node listening to the query sends a membership report for all multicast addresses it is listening to, excluding the all-nodes link-local multicast address and any multicast addresses of scope 0 (reserved) and 1 (node-local).

My question is, is the node required to send the membership report for solicited-node multicast address as well? In general, since nodes do not receive link-local scope multicast packets from out side the link, why is it required for the nodes to report membership to the router for *any* link-local scope multicast addresses?

Thanks,
Siva

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