Telematics Chapter 6: Network Layer - Freie Universität Berlin

Multicast Routing – PIM-SM as example
● Protocol Independent Multicast – Sparse Mode (RFC 2362)
● Can support Internet-wide MC groups, does not require specific unicast protocol
● No flooding plus pruning but explicit construction of a tree
● Assumptions
● Only a very low percentage of nodes will subscribe to a MC group
● Joining an MC group
● IGMP join in the local subnet
● PIM join to a so-called rendezvous point (RP)
● PIM join between RP and sender
● Routers forward join messages to an RP
● MC sender
● Send register messages to RP
● RP distributes data along MC tree
Univ.-Prof. Dr.-Ing. Jochen H. Schiller ▪ cst.mi.fu-berlin.de ▪ Telematics ▪ Chapter 6: Network Layer
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