Configuring a multicast routing policy involves configuring
the longest match of the multicast route, configuring multicast load
splitting, and setting a multicast load splitting weight.
If the longest match principle is configured for route selection, a multicast device prefers the route with the longest matched mask. If the mask lengths of multiple routes are the same, the device selects a route as the multicast data forwarding path in the order of the static multicast route, inter-domain unicast route, and intra-domain unicast route.
Performing load splitting of multicast traffic according to different policies can optimize network traffic transmission in the scenario where multiple multicast data flows exist. You can choose to configure a balance-preferred or stable-preferred load splitting policy.
When a load splitting policy is configured, because the forwarding capabilities of equal-cost routes are different from the actual load bearing situation on the equal-cost routes, balanced load splitting cannot meet network requirements in some scenarios. In such a case, you can configure a load splitting weight on an interface to achieve unbalanced multicast load splitting.