mld ssm-mapping enable

Function

The mld ssm-mapping enable command enables MLD SSM mapping on an interface.

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

By default, MLD SSM mapping is disabled on an interface.

Format

mld ssm-mapping enable

undo mld ssm-mapping enable

Parameters

None

Views

GE interface view, XGE interface view, MultiGE interface view, 25GE interface view, 40GE interface view, 100GE interface view, Eth-Trunk interface view, VLANIF interface view, loopback interface view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

The SSM model allows MLDv2 hosts to specify the multicast sources from which they want to receive data. However, some hosts can only run MLDv1. To allow these hosts to use SSM, configure MLD SSM mapping on the switch. MLD SSM mapping is implemented based on static SSM mapping entries on the switch. The switch converts (*, G) information in MLDv1 Multicast Listener Report messages to (S, G) information according to static SSM mapping entries to provide the SSM service for MLDv1 hosts.

The mld ssm-mapping enable command enables MLD SSM mapping on an interface. The mappings between SSM sources and multicast group addresses take effect only when MLD SSM mapping is enabled on an interface. SSM mapping entries are configured using the ssm-mapping (MLD view) command.

Prerequisites

Layer 3 IPv6 multicast has been enabled using the multicast ipv6 routing-enable command in the system view.

Precautions

SSM mapping enabled on an interface is irrelevant to the version number of MLD.

Example

# Enable MLD SSM mapping on VLANIF100.

<HUAWEI> system-view
[HUAWEI] multicast ipv6 routing-enable
[HUAWEI] interface vlanif 100
[HUAWEI-Vlanif100] mld ssm-mapping enable

# Enable MLD SSM mapping on GE0/0/1.

<HUAWEI> system-view
[HUAWEI] multicast ipv6 routing-enable
[HUAWEI] interface gigabitethernet 0/0/1
[HUAWEI-GigabitEthernet0/0/1] undo portswitch
[HUAWEI-GigabitEthernet0/0/1] mld ssm-mapping enable