http://www.rfc-editor.org/rfc/rfc5110.txt
RFC 5110: Overview of the Internet Multicast Routing Architecture, P. Savola2008-01-01T23:00:00-00:00This memo also reclassifies several older RFCs to Historic. These RFCs describe multicast routing protocols that were never widely deployed or have fallen into disuse. This memo provides information for the Internet community.