Huawei Arista Networks NICT UNH DT Cisco IP Infusion Juniper Networks Arris The PIM WG intends to progress IGMPv3 and MLDv2 from Proposed Standards to Internet Standards. This document describes the motivation, procedures and questions proposed for a survey of operators, vendors and implementors of IGMPv3 and MLDv2. The objective of the survey is to collate information to help the PIM WG progress these protocols to Internet Standards.