Multicast VPN Using Bit Index Explicit Replication (BIER)
M. Sivakumar, T. Przygienda, Sam Aldrin, A. Dolganow · 2019
The Multicast Virtual Private Network (MVPN) specifications require the use of multicast tunnels (P-tunnels) that traverse a Service Provider's backbone network. The P-tunnels are used for carrying multicast traffic across the backbone. A variety of P-tunnel types are supported. Bit Index Explicit Replication (BIER) is a new architecture that provides optimal multicast forwarding through a multicast domain, without requiring intermediate routers to maintain any per- flow state or to engage in an explicit tree-building protocol. This document specifies the protocol and procedures that allow MVPN to use BIER as the method of carrying multicast traffic over an SP backbone network.