MVPN mLDP bud node support with Looping back interface

You can terminate multicast virtual private network (MVPN) traffic to the correct routing instance in a bud node by using the Looping back interface (LBI). On detection of this interface, MVPN P2MP multipoint LDP modules install a newly labelled route, where the next hop is updated to include the LBI and an additional branch to the next egress PE router. The LBI is created automatically on boot up and needs no configuration.