Yesterday I got a query on MVPN:-
In MVPN MTI(Multicast Tunnel Interface) is coming up but but end to end pim neighborship on MTI tunnel is not coming up. What is reason for this and how this can be possible?
The question is very intectually. Actually the formation of MTI depends on the default MDT group which is being mentioned under vrf. So once the reachability of that group available in the MPLSVPN cloud MTI tunnel comes up. But PIM neighborship depends on the pim sparse-dense-mode or sparse-mode and if it is not coming up definately in the path pim sparse-dense mode or sparse mode is missing.