Wijnands, IJ., Ed., Eckert, T., Leymann, N., and M. Napierala, "Multipoint LDP In-Band Signaling for Point-to-Multipoint and Multipoint-to-Multipoint Label Switched Paths", RFC 6826, DOI 10.17487/RFC6826, January 2013, <https://www.rfc-editor.org/info/rfc6826>.