DVMRP (contd)
If router C can receive datagrams from both A and B, then it will receive from A if A’s metric to the source is smaller than B’s or if they are equal, A has the smaller IP address on its downstream interface
Separate processes (and updates) for unicast and multicast routing
“poison-reverse”: the subordinate sets the route for the source as infinity in routing updates sent on a common LAN
DVMRP routing table = shortest path (source-based) spanning tree to every possible source-prefix in the internetwork
DVMRP forwarding table: built from routing table, known active groups, received prune messages