Using a unicast topology instance for multicast services applies only to the PIM-SM intra-domain scenario.
Before enabling multicast services to run in a specified unicast topology instance, you must configure a multicast topology instance and a unicast topology instance in the system view.
For the configuration details, see Configuring IPv4 Multi-topology. Ensure that one of the topology names is multicast.
The system view is displayed.
The multicast multi-topologies view of the public network instance is displayed.
Multicast services are enabled to run in a unicast topology instance.
The configuration is committed.