Having some issues troubleshooting a multicast issue. The first ping responds then all the following time out. This is an indication of a problem switching from the RPT to SPT. On the RP I noticed that the SPT's outgoing list is null but the RPT has the serial interface. Why would that be?
(*, 226.0.0.4), 00:13:44/stopped, RP 150.1.1.1, flags: S
Incoming interface: Null, RPF nbr 0.0.0.0
Outgoing interface list:
Serial0/0/0:0, Forward/Sparse-Dense, 00:13:44/00:02:34
(192.10.1.9, 226.0.0.4), 00:00:14/00:02:59, flags: PTX
Incoming interface: Serial0/0/0:0, RPF nbr 174.1.145.5
Outgoing interface list: Null