Protocol-Independent Multicast: Difference between revisions

Content deleted Content added
improve RFC link
Added case for IGMPv3 source-specific join
 
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* Whether they arrive encapsulated or natively, the RP forwards the source's de-capsulated data packets down the RP-centered distribution tree toward group members.
* If the data rate warrants it, routers with local receivers can join a source-specific, shortest path, distribution tree, and prune this source's packets off the shared RP-centered tree.
* Where a router's local receivers are only interested in packets from a specific source within a multicast group, the router may skip joining the RP centered shared tree and jump straight to joining the source-specific shortest path tree.
* For low data rate sources, neither the RP, nor last-hop routers need join a source-specific shortest path tree and data packets can be delivered via the shared RP-tree.