R2#sh run | b ip pim rp
ip pim rp-candidate Loopback0 interval 10
ip msdp peer 180.40.7.3
!

R2#sh run int lo 0
Building configuration...

Current configuration : 97 bytes
!
interface Loopback0
 ip address 223.254.254.254 255.255.255.255
 ip pim sparse-dense-mode
end

R3#sh run int lo 0
Building configuration...

Current configuration : 97 bytes
!
interface Loopback0
 ip address 223.254.254.254 255.255.255.255
 ip pim sparse-dense-mode

ip pim rp-candidate Loopback0 interval 10

ip msdp peer 180.40.7.2
!