The multicast ipv6 load-splitting command enables load splitting among IPv6 multicast routes.
The undo multicast ipv6 load-splitting command restores the default configuration.
By default, load splitting among IPv6 multicast routes is disabled.
multicast ipv6 load-splitting { balance-preferred | stable-preferred | group | source | source-group }
undo multicast ipv6 load-splitting
| Parameter | Description | Value |
|---|---|---|
| balance-preferred | Indicates balance-preferred load splitting. This policy is applicable to the scenario where hosts frequently join or leave groups, which requires automatic load adjustment. | - |
| group | Indicates group address-based load splitting. This policy is applicable to the scenario of one source to multiple groups. | - |
| source | Indicates source address-based load splitting. This policy is applicable to the scenario of multiple sources to one group. | - |
| source-group | Indicates source and group addresses-based load splitting. This policy is applicable to the scenario of multiple sources to multiple groups. | - |
| stable-preferred | Indicates stable-preferred load splitting. This policy is applicable to stable multicast networking. | - |
Usage Scenario
By default, if there are multiple equal-cost routes to a multicast source, the device selects the route with the largest next-hop address as the RPF route. To enable multicast data to be forwarded through multiple paths, run this command to configure multicast load splitting. After multicast load splitting is configured, the device uses the specified load splitting policy to distribute multicast data among multiple paths. This function improves quality of multicast forwarding.
Prerequisites
IPv6 multicast routing has been enabled globally using the multicast ipv6 routing-enable command in the system view.
Follow-up Procedure
Because the forwarding capabilities of equal-cost routes are different from the actual load distribution situation on the equal-cost routes, even load splitting cannot meet network requirements in some scenarios. In this case, you can run the multicast ipv6 load-splitting weight command to configure the IPv6 multicast load splitting weight on the interface to realize unbalanced load splitting.
Precautions
The five load splitting policies are mutually exclusive. It is recommended that you use a fixed load splitting policy based on the actual situation on your network. The balance-preferred or stable-preferred policy is preferred.
If PIM-DM (IPv6) is enabled on the switch, the balance-preferred or stable-preferred policy cannot be used.