Subnet lookup

Check for traffic flowing over the shared tree. For a successful RPF verification of multicast (S,G) traffic flowing over the Shortest Path Tree (SPT), an ip mroute source-address nexthop command needs to be configured for the multicast source, pointing to the tunnel interface. In this case, when SPT traffic is flowing over tunnel interface an ip mroute 10.1.1.0 255.255.255.0 tunnel 0 command is configured on R104 to ensure a successful RPF verification for incoming (10.1.1.1, 239.1.1.20) multicast packets over the Tunnel 0 interface. R102# version 12.2hostname r102ip subnet-zerono ip domain-lookup!--- It stops IP domain lookup, which improves the show command response time.!ip multicast-routing!--- Enables IP multicast routing.!interface Loopback0 ip address 2.2.2.2 255.255.255.255!--- Tunnel Source interface.!interface Tunnel0!--- Tunnel interface configured for PIM and carrying multicast packets to R104. ip address 192.168.24.1 255.255.255.252 ip pim sparse-dense-mode tunnel source Loopback0 tunnel destination 4.4.4.4!interface Ethernet0/0!--- Interface connected to Source.ip address 10.1.1.2 255.255.255.0 ip pim sparse-dense-mode!interface Serial8/0 ip address 192.168.23.1 255.255.255.252!--- Note IP PIM sparse-dense mode is not configured on Serial interface.!router ospf 1 log-adjacency-changes network 2.2.2.2 0.0.0.0 area 0 network 10.1.1.0 0.0.0.255 area 0 network 192.168.23.0 0.0.0.255 area 0!ip classlessip pim bidir-enable! line con 0line aux 0line vty 0 4 login!end R104# version 12.2!hostname r104!ip subnet-zerono ip domain-lookup!--- It stops IP domain lookup, which improves the show command response time.!ip multicast-routing!--- Enables IP multicast routing.!interface Loopback0 ip address 4.4.4.4 255.255.255.255!--- Tunnel Source interface.!interface Tunnel0 ip address 192.168.24.2 255.255.255.252!--- Tunnel interface configured for PIM and carrying multicast packets.ip pim sparse-dense-mode tunnel source Loopback0 tunnel destination

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