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