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CONFIDENTIAL
26-Jan-04
© 2002 Procket Networks, Inc. All rights reserved.
PIM-SM
•Protocol Independent Multicast - sparse mode
•draft-ietf-pim-sm-v2-new-xx
•Obsoletes RFC 2362
•BSR removed from PIM spec.
•explicit join: assumes everyone does not want the data
•uses unicast  routing table for RPF checking
•data and joins are forwarded to RP for initial rendezvous
•all routers in a PIM domain must have RP mapping
•when load exceeds threshold forwarding swaps to shortest path tree (default is first packet)
•state increases (not everywhere) as number of sources and number of groups increase
•source-tree state is refreshed when data is forwarded and with Join/Prune control messages
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