Can use multiple auto RP machines, but priority goes to the highest advertised ip address (in the case above, would be the ip address on loopback | Key Commands MULTICASTING Shows and Debugs R1 config-if ip igrp join-group R1 config ip multicast-routing R1 config ip cgmp Then select multicast routing protocol For PIM dense mode R1 config-if Sparse mode R1 config-if R1 config ip ip pim dense mode Show ip pim interface Show ip pim neighbor Show ip mroute Show ip mroute summary Show ip mroute count Show ip mroute active Show ip igmp group ip pim sparse-mode pim rp-address On Catalyst Set cgmp enable Set cgmp multicast router mod port Additional Commands For PIM auto-rp interface config ip pim send-rp-announce loopback 0 scope 16 ip pim send-rp-discovery scope 16 Where loopback 0 is the announcing interface and scope 16 is a TTL of 16 hops. Rp filter ip pim accept-rp or group-list 10 Tunnel for multicast only Interface tunnel 0 Ip unnumbered ethernet 0 Ip pim sparse-mode Tunnel source ethernet 0 Tunnel destination Tunnel mode DVMRP Over NBMA config-if ip pim nbma-mode Spot The Issue Notes The two steps 1. Define the ip multicast group to support in your multicast routing with the interface command ip igmp join-group 2. Enable IP multicast routing in global configuration mode and define which multicast routing protocol to use. Choices are MOSPF PIM DVMRP Can PING the multicast address ex to test multicast reacheability. Can use multiple auto RP machines but priority goes to the highest advertised ip address in the case above would be the ip address on loopback
