interface lo
 ip pim
 ip pim use-source 10.254.254.1
!
interface r1-eth0
 ip pim
!
interface r1-eth1
 ip pim
 ip igmp
!
ip pim rp 10.254.254.1
ip pim join-prune-interval 5
ip msdp timers 10 20 3
ip msdp mesh-group mg-1 source 10.254.254.1
ip msdp mesh-group mg-1 member 10.254.254.2
ip msdp mesh-group mg-1 member 10.254.254.3