Ensure router A interfaces which will forward/receive multicast traffic are configured for sparse-dense-mode. If you configure PIM in sparse mode or sparse-dense mode and do not configure Auto-RP, you must statically configure an RP. If router interfaces are configured in sparse mode, Auto-RP can still be used if all routers are configured with a static RP address for the Auto-RP groups.Another option is to enable the global configuration command [ip pim autorp listener], which causes IP multicast traffic for the two Auto-RP groups 188.8.131.52 and 184.108.40.206 to be dense mode flooded across interfaces operating in PIM sparse mode, and multicast traffic can operate in sparse mode, bidirectional mode, or source specific multicast (SSM) mode.
ip pim autorp listener
ip pim send-rp-announce Loopback1 scope 16 group-list 1
Configure the interfaces to use the NBMA software feature. This PIM feature allows you to configure a router to send multicast packets only to those neighbors that want to receive them. A router in PIM NBMA mode treats each remote PIM neighbor as if it were connected to the router through a point-to-point link. You enable the NBMA feature on a interface using the [ip pim nbma-mode] command. This will cause the router to track the ips of each neighbor when a PIM join message is received from that neighbor. In addition, the router will also be able to track the interface of the neighbor in the outgoing interface list, thus forwarding multicast data for specific multicast groups only to the neighbors that have joined the group. Keep in mind that NBMA mode does not support dense-mode, and the mapping agent must be able to communicate with all remote routers. You can configure the mapping agent on the hub router or another router behind it, but not on the remote routers. Also, ensure that you configure NBMA on all routers in the FR network:
ip address 10.1.1.1 255.255.255.255
ip pim sparse-dense-mode
ip address 10.2.2.1 255.255.255.0
ip pim nbma-mode
ip pim sparse-mode
frame-relay interface-dlci 1
frame-relay interface-dlci 2
ip pim send-rp-announce Loopback1 scope 16
ip pim send-rp-discovery Loopback1 scope 16
If you can use point-point subinterfaces, this will be much better and you would not need to configure NBMA mode. This is the prefered method over a FR network.
We are pleased to announce availability of Beta software for 16.6.3. 16.6.3 will be the second rebuild on the 16.6 release train targeted towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are looking for early feedback from custome...