%% You should probably cite rfc5015 instead of this I-D. @techreport{ietf-pim-bidir-09, number = {draft-ietf-pim-bidir-09}, type = {Internet-Draft}, institution = {Internet Engineering Task Force}, publisher = {Internet Engineering Task Force}, note = {Work in Progress}, url = {https://datatracker.ietf.org/doc/draft-ietf-pim-bidir/09/}, author = {Tony Speakman and Lorenzo Vicisano and Mark J. Handley and Isidor Kouvelas}, title = {{Bidirectional Protocol Independent Multicast (BIDIR-PIM)}}, pagetotal = 43, year = 2007, month = feb, day = 23, abstract = {This document discusses Bidirectional PIM (BIDIR-PIM), a variant of PIM Sparse-Mode that builds bidirectional shared trees connecting multicast sources and receivers. Bidirectional trees are built using a fail-safe Designated Forwarder (DF) election mechanism operating on each link of a multicast topology. With the assistance of the DF, multicast data is natively forwarded from sources to the Rendezvous-Point (RP) and hence along the shared tree to receivers without requiring source-specific state. The DF election takes place at RP discovery time and provides the route to the RP, thus eliminating the requirement for data-driven protocol events. {[}STANDARDS-TRACK{]}}, }