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.
Before configuring a multicast load splitting weight, complete the following tasks:
Configuring a unicast routing protocol
Configuring basic multicast functions
When stable-preferred or balance-preferred load splitting 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.
interface interface-type interface-number
multicast load-splitting weight weight-value
By default, the multicast load splitting weight of an interface is 1.
The greater the multicast load splitting weight of an interface, the more multicast routing entries with this interface being the upstream interface. When the multicast load splitting weight on an interface is 0, it indicates that the routes with this interface being the upstream interface do not take part in load splitting.