hostname R1
!
ip multicast-routing
!
interface Loopback101
 ip pim sparse-dense-mode
 ip igmp join-group 239.255.1.1
!
interface Serial0/0/0.13 point-to-point
 ip pim sparse-dense-mode
!
interface Serial0/0/0.124 multipoint
 ip pim sparse-dense-mode
 ip ospf network point-to-multipoint
!
router ospf 1
 router-id 1.1.1.1
 log-adjacency-changes
 redistribute bgp 65001 subnets
 network 172.16.120.1 0.0.0.0 area 0
 network 172.16.0.0 0.0.255.255 area 0
!
ip mroute 0.0.0.0 0.0.0.0 Serial0/0/0.13