BIER Penultimate Hop Popping
Juniper Networks
Bit Index Explicit Replication (BIER) can be used as provider tunnel
for Multicast Virtual Private Network (MVPN) [RFC6514], Global
Table Multicast [RFC7716] or Ethernet Virtual Private Network (EVPN)
[RFC7432]. It is possible that not all routers in the provider
network support BIER and there are various methods to handle BIER
incapable transit routers. However those methods assume the MVPN/
EVPN Provider Edges (PEs) are BIER capable. This document specifies
a method to allow BIER incapable routers to act as MVPN/EVPN PEs with
BIER as the transport, by having the upstream BIER Forwarding Router
(BFR) that is connected directly or indirectly via a tunnel to a BIER
incapable PE remove the BIER header and send the payload to the PE.