First, this BoF is not necessarily intended to result in a new working group. Rather, the intention is to stimulate some new thinking around the IPv4 Multicast Address Architecture and Allocation problem (s). Specifically, allocation architectures, the causes for the land grab (e.g., no lightweight service discovery protocol), and to clean up the various older allocation strategies that, while documented in various RFCs, have never been widely deployed on the public Internet.