Nokia Multicast Protocols
Question No. 1
If BGP Auto Discovery is used, MPLS LSPs must be used for the P-tunnels in the MVPN.
PIM state is maintained between PEs in the MVPN without PIM Hello messages.
MP-BGP keepalive messages are used to maintain adjacencies between the PEs in an MVPN.
MP-BGP can also be used as the multicast signaling protocol between the PEs and CEs.