RFC 3353 (rfc3353) - Page 3 of 30
Overview of IP Multicast in a Multi-Protocol Label Switching (MPLS) Environment
Alternative Format: Original Text Document
RFC 3353 IP Multicast in an MPLS Environment August 2002 Table of Abbreviations ATM Asynchronous Transfer Node CBT Core Based Tree CoS Class of Service DLCI Data Link Connection Identifier DRrecv Designated Router of the receiver DRsend Designated Router of the sender DVMRP Distant Vector Multicast Routing Protocol FR Frame Relay IGMP Internet Group Management Protocol IP Internet Protocol L2 layer 2 (e.g. ATM, Frame Relay) L3 layer 3 (e.g. IP) LSP Label Switched Path LSR Label Switching Router LSRd Downstream LSR LSRu Upstream LSR MOSPF Multicast OSPF mp2mp multipoint-to-multipoint MRT Multicast Routing Table p2mp point-to-multipoint PIM-DM Protocol Independent Multicast-Dense Mode PIM-SM Protocol Independent Multicast-Sparse Mode QoS Quality of Service RP Rendezvous Point RPT-bit RP Tree bit [DEER] RSVP Resource reSerVation Protocol SPT-bit Shortest Path Tree [DEER] SSM Source Specific Multicast TCP Transmission Control Protocol UDP User Datagram Protocol VC Virtual Circuit VCI Virtual Circuit Identifier VP Virtual Path VPI Virtual Path Identifier 1. Introduction In an MPLS cloud the routes are determined by a L3 routing protocol. These routes can then be mapped onto L2 paths to enhance network performance. Besides this, MPLS offers a vehicle for enhanced network services such as QoS/CoS, traffic engineering, etc. Current unicast routing protocols generate a same (optimal) shortest path in steady state for a certain (source, destination) pair. Remark that unicast protocols can behave slightly different with regard to equal cost paths. Ooms, et al. Informational
