multicast ipv6 rpf multi-topology

Function

The multicast ipv6 rpf multi-topology command enables IPv6 multicast services to run in a multicast topology instance and enters the IPv6 multicast multi-topology view.

The undo multicast ipv6 rpf multi-topology command disables IPv6 multicast services from running in a multicast topology instance.

By default, IPv6 multicast services are disabled from running in a multicast topology instance.

Format

multicast ipv6 rpf multi-topology

undo multicast ipv6 rpf multi-topology

Parameters

None

Views

System view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
mcast-base	write

Usage Guidelines

Usage Scenario

On the current network, multicast services highly depend on unicast routes. During multicast routing, a router searches a unicast routing table for an optimal route. If the unicast optimal route, shared by both multicast services and unicast services, is faulty, the multicast services and unicast services will be interrupted and users fail to receive the multicast data.

With multicast multi-topologies, IPv6 multicast services can run in a specified topology, which isolates IPv6 multicast services from unicast services, and the system searches routes only in the unicast routing table, the static multicast routing table, and the Multicast Border Gateway Protocol (MBGP) routing table specified by the multicast topology.

Prerequisites

A global IPv6 multicast topology instance has been enabled.

Precautions

Multicast topology instances support direct routes, static routes, IS-IS routes, and MBGP routes.

Example

# Enable multicast multi-topologies in the system view and enter the IPv6 multicast multi-topology view.

<HUAWEI> system-view
[~HUAWEI] multicast  ipv6 routing-enable
[~HUAWEI] ipv6 topology multicast
[*HUAWEI] multicast ipv6 rpf multi-topology