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IP multicast routing protocols
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DVMPR - Distance Vector Multicast Routing Protocol (Cisco, Bay,3Com) more complicated than RIP; used by MBONE; specification RFC 1075; uses reverse path flooding technique
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PIM - Protocol Independent Multicast (routing protocol from Cisco, Bay Networks); PIM is used by multicast routers to determine which other multicast routers should receive multicast packets
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PIM dense-mode: transmits packets to all LANs unless it receives instruction to the contrary; reverse path flooding algorithm;
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PIM sparse-mode: transmits packets to LANs which have made "join" request; optimized for many data streams but relatively few LANs
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