%% You should probably cite draft-ietf-pim-null-register-packing instead of this I-D. @techreport{ramki-pim-null-register-packing-03, number = {draft-ramki-pim-null-register-packing-03}, type = {Internet-Draft}, institution = {Internet Engineering Task Force}, publisher = {Internet Engineering Task Force}, note = {Work in Progress}, url = {https://datatracker.ietf.org/doc/draft-ramki-pim-null-register-packing/03/}, author = {Vikas Ramesh Kamath and Ramakrishnan Cokkanathapuram Sundaram and Raunak Banthia}, title = {{PIM Null register packing}}, pagetotal = 7, year = 2019, month = apr, day = 12, abstract = {In PIM-SM networks PIM registers are sent from the first hop router to the RP (Rendezvous Point) to signal the presence of Multicast source in the network. There are periodic PIM Null registers sent from first hop router to the RP to keep the state alive at the RP as long as the source is active. The PIM Null register packet carries information about a single Multicast source and group. This document defines a standard to send multiple Multicast source and group information in a single pim Null register packet and the interoperability between the PIM routers which do not understand the packet format with multiple Multicast source and group details.}, }