The system synchronously maintains multiple multicast routing protocols, and controls multicast routing and forwarding by exchanging information between the control plane and forwarding plane.
Multicast routing and forwarding are implemented based multicast protocol routing and the multicast forwarding tables. Multicast routing and forwarding control are implemented based on multicast routing management.
With multicast multi-topologies, multicast services can run in a specified topology, which isolates multicast services from unicast services and eliminates the configuration conflict when both multicast services and unidirectional Traffic Engineering (TE) tunnel services are deployed. In deploying multicast multi-topologies, you can specify either a multicast topology instance or a unicast topology instance for running multicast services.
Multicast data for each multicast group on a network needs to be transmitted in a certain range. You can control the multicast forwarding range by setting a minimum TTL value for multicast packets or a multicast forwarding boundary.
To ensure that a public network router can forward multicast traffic normally, enable the router to iterate original next hops of multicast routes to MIGP shortcuts.
This section describes how to configure the maximum number of invalid ipv4 multicast protocol packets that a device can store. This configuration helps locate and rectify faults.
During the routine maintenance of IPv4 multicast routing management, you can run the display commands in any view to learn the running of the multicast forwarding table.