mld ssm-mapping enable

Function

The mld ssm-mapping enable command enables Source-Specific Multicast (SSM) mapping on an interface.

The undo mld ssm-mapping enable command disables SSM mapping on an interface.

By default, SSM mapping is not enabled on an interface.

Format

mld ssm-mapping enable

undo mld ssm-mapping enable

Parameters

None

Views

100ge sub-interface view, 100GE interface view, 10GE sub-interface view, 10GE interface view, 200GE sub-interface view, 25GE sub-interface view, 25GE interface view, 400GE sub-interface view, 400GE interface view, 40GE sub-interface view, 40GE interface view, 50GE sub-interface view, 50GE interface view, Eth-Trunk sub-interface view, Eth-Trunk interface view, FlexE interface view, GE optical interface view, GE sub-interface view, GE interface view, GE electrical interface view, Global VE sub-interface view, Loopback interface view, PW-VE sub-interface view, VE sub-interface view, VLANIF interface view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
igmp	write

Usage Guidelines

Usage Scenario

If a multicast Router runs Multicast Listener Discovery version 2 (MLDv2) but its connected user hosts have to run MLDv1, configure Source-Specific Multicast (SSM) mapping on the Router, so the multicast Router also provides the SSM service for the hosts that run MLDv1.

Enable the SSM mapping function on an interface before you configure MLD SSM mapping. If SSM mapping is not enabled, SSM source/group address mapping entries cannot take effect on the interface.

Prerequisites

Multicast routing has been enabled using the multicast ipv6 routing-enable command.

Example

# Enable SSM mapping on GE 0/1/0.

<HUAWEI> system-view
[~HUAWEI] multicast ipv6 routing-enable
[*HUAWEI] interface GigabitEthernet 0/1/0
[*HUAWEI-GigabitEthernet0/1/0] ipv6 enable
[*HUAWEI-GigabitEthernet0/1/0] mld ssm-mapping enable