16.1.17 IPv4 Multicast Extranet Settings [SL-L3A]

Points to note

In an IPv4 multicast extranet, a unicast extranet to the sender must be configured for the forwarding destination VRF and a unicast route must exist.

Configure multicast route filtering for a VRF in which the sender exists. If no conditions are specified for the route filtering, all multicast addresses can be forwarded to all VRFs on which multicasts run. Specify all the multicast route filtering settings in global configuration mode. The following figure shows an example of a PIM-SSM configuration in which VRF 10 is associated with VPN 2 and IP of VRF 10 interfaces is 192.168.1.1/24 or 192.168.3.1/24. In this situation, VPN 1 (global network) must have a unicast route to the servers (192.168.2.2) on VPN 2(VRF 10.

Figure 16-6: Sample PIM-SSM Configuration in VRF (IPv4 Multicast Extranet)

Command examples

(config)# route-map MLTEXNET permit 10

(config-route-map)# exit

Creates a route-map that permits all multicast forwarding requests.
(config)# vrf definition 10

(config-vrf)# import multicast inter-vrf MLTEXNET

(config-vrf)# exit

Applies the setting that permits multicast forwarding requests from all VRFs to VRF 10.