Multicast Source Discovery Protocol: Difference between revisions

Revision as of 13:58, 3 July 2013

Revision as of 13:49, 23 March 2014

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'''Multicast Source Discovery Protocol''' ('''MSDP''') is a [[Protocol Independent Multicast]] (PIM) family [[multicast]] [[routing protocol]] defined by Experimental RFC 3618. MSDP interconnects multiple [[IPv4]] [[Sparse multicast|PIM Sparse-Mode]] (PIM-SM) [[Domain name|domains]] which enables PIM-SM to have Rendezvous Point (RP) [[redundancy (engineering)|redundancy]] and [[inter-___domain]] multicasting RFC 4611.

MSDP uses TCP as its transport protocol. Each multicast tree has to have its own RP. All of the RPs are peers (directly or through other MSDP peers). Messages contain Source of Data, Group Address The Data Source Sends To (S,G). If an RP on its own ___domain receives a message it determines if there are group members on this ___domain interested in a multicast. If someone is interested it triggers a join towards the data source (into the source ___domain) in the way of (S, G). In a peering relationship, one MSDP peer listens for new TCP connections on the well-known port 639.

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==External links==

* RFC 3618

* RFC 4611

* [[Multicast BGP]]