The Protocols for IP Multicast (PIM) Working Group is chartered to work on the development of IP multicast protocols. This development includes the maintenance, improvement and extension of the PIM, Internet Group Management Protocol (IGMP) and Multicast Listener Discovery (MLD) protocols. The Working Group will also work on the following items:

1) Altering existing procedures for improvement within environments not optimal for multicast.
2) YANG models for PIM, IGMP, and MLD will be developed for both configuration and operational states. If updates to existing MIB modules are necessary, the WG may work on those.
3) Develop Point-2-Multipoint (P2MP) Segment Routing protocols per agreement with the SPRING WG.
4) Develop PIM extensions to improve multicast distribution trees in Locator/ID Separation Protocol (LISP) environments.
5) Improve and extend PIM Join Attributes to support different types of multicast applications.
6) Develop multicast routing and group membership protocols to optimize and improve network resilience.
7) Develop multicast group address allocation protocols.
8) Create multicast protocol design experience documents.

New ideas related to multicast protocols, and distribution of multicast related information, are welcome to be proposed to PIM. Adoption of such work, beyond the scope of the above areas or items, will require a recharter.

The PIM WG mailing list, and WG meetings, are open to support review discussions for multicast related work items from other WGs and RGs. Currently, such adjacencies exist for work in MBONED, LISP, MPLS, BESS, ROLL and BIER.