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multicast

1.6.b Reverse Path Forwarding Check

21. February 2022

When a router receives a multicast packet, RPF will check the routing table and check which interface it would use if it were to send traffic back to the multicast sender. If the interface matches the interface that the multicast packet was just received on, then the packet is accepted, otherwise it is dropped.

1.6.c PIM

21. February 2022

1.6c i Sparse Mode  Instead of flooding multicast traffic to all potential receivers, PIM Sparse Mode builds explicit multicast distribution trees from the receivers to the sources.  To build an explicit tree to the source, receivers and sources should have a way to dynamically discover each other – Rendezvous Points.  The biggest challenge facing PIM… read more »

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