Lecture TCP-IP protocol suite - Chapter 14: Multicasting and multicast routing protocols

Upon completion you will be able to: Differentiate between a unicast, multicast, and broadcast message; know the many applications of multicasting; understand multicast link state routing and MOSPF; understand multicast link state routing and DVMRP; understand the Core-Based Tree Protocol; understand the Protocol Independent Multicast Protocols; understand the MBONE concept.
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Lecture TCP-IP protocol suite - Chapter 14: Multicasting and multicast routing protocols Chapter14 Multicasting And Multicast RoutingProtocolsMcGrawHill ©TheMcGrawHillCompanies,Inc.,2000 CONTENTS •INTRODUCTION •MULTICASTROUTING •MULTICASTTREES •MULTICASTROUTINGPROTOCOLS •DVMRP •MOSPF •CBT •PIM •MBONEMcGrawHill ©TheMcGrawHillCompanies,Inc.,2000 14.1 INTRODUCTIONMcGrawHill ©TheMcGrawHillCompanies,Inc.,2000Figure141 UnicastingMcGrawHill ©TheMcGrawHillCompanies,Inc.,2000 In unicast routing, the router forwards the received packet through only one of its interfaces.McGrawHill ©TheMcGrawHillCompanies,Inc.,2000Figure142 MulticastingMcGrawHill ©TheMcGrawHillCompanies,Inc.,2000 In multicast routing, the router may forward the received packet through several of its interfaces.McGrawHill ©TheMcGrawHillCompanies,Inc.,2000Figure143:a Multicasting versus multiple unicastingMcGrawHill ©TheMcGrawHillCompanies,Inc.,2000Figure143:b Multicasting versus multiple unicastingMcGrawHill ©TheMcGrawHillCompanies,Inc.,2000 Emulation of multicasting through multiple unicasting is not efficient and may create long delays, particularly with a large group.McGrawHill ©TheMcGrawHillCompanies,Inc.,2000 14.2 MULTICAST ROUTINGMcGrawHill ©TheMcGrawHillCompanies,Inc.,2000 14.3 MULTICAST TREESMcGrawHill ©TheMcGrawHillCompanies,Inc.,2000 In a source-based tree approach, the combination of source and group determines the tree.McGrawHill ©TheMcGrawHillCompanies,Inc.,2000 In the group-shared tree approach, the group determines the tree.McGrawHill ©TheMcGrawHillCompanies,Inc.,2000 14.4 MULTICAST ROUTING PROTOCOLSMcGrawHill ©TheMcGrawHillCompanies,Inc.,2000Figure144 Multicast routing protocolsMcGrawHill ©TheMcGrawHillCompanies,Inc.,2000 14.5 DVMRPMcGrawHill ©TheMcGrawHillCompanies,Inc.,2000Figure145 Reverse path forwardingMcGrawHill ©TheMcGrawHillCompanies,Inc.,2000 In reverse path forwarding (RPF), the router forwards only the packets that have traveled the shortest path from the source to the router; all other copies are discarded.McGrawHill ©TheMcGrawHillCompanies,Inc.,2000 RPF prevents the formation of loops.McGrawHill ©TheMcGrawHillCompanies,Inc.,2000