Multicast RPF Failure

RPF failures occur in two general situations: packets being flooded out of the wrong interface or multiple routing protocols in the network, and the router might have paths to the source learned via different protocols.

Let us add a static route in R6 for 1.1.1.1 the Loopback IP of R1 towards interface f1/0, which will cause the RPF check failure.

R6(config)#ip route 1.1.1.1 255.255.255.255 FastEthernet1/0

R7#show run int f0/0
!
interface FastEthernet0/0
 ip address 47.1.1.7 255.255.255.0
 ip pim dense-mode
 ip igmp join-group 224.10.10.10
 duplex auto
 speed auto
end