http://www.rfc-editor.org/rfc/rfc4602.txt
RFC 4602: Protocol Independent Multicast - Sparse Mode (PIM-SM) IETF Proposed Standard Requirements Analysis, T. Pusateri2006-08-01T23:00:00-00:00This document provides supporting documentation to advance the Protocol Independent Multicast - Sparse Mode (PIM-SM) routing protocol from IETF Experimental status to Proposed Standard. This memo provides information for the Internet community.