H3C Technologies H3C S12500 Series Switches - Manual (Page 373)

357
• Configure basic MLD functions.
Enabling MLD SSM mapping
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter interface view.
interface interface-type
interface-number
N/A
3. Enable the MLD SSM
mapping feature.
mld ssm-mapping enable
Disabled by default.
To ensure SSM service for all hosts
on a subnet, regardless of the MLD
version running on the hosts,
enable MLDv2 on the interface that
forwards IPv6 multicast traffic onto
the subnet.
Configuring MLD SSM mappings
By performing this configuration multiple times, you can map an IPv6 multicast group to different IPv6
multicast sources.
If MLDv2 is enabled on a VLAN interface, and if a port in that VLAN is configured as a simulated host,
the simulated host will send MLDv2 reports even if you did not specify an IPv6 multicast source when you
configure simulated joining with the mld-snooping host-join command. In this case, the corresponding
IPv6 multicast group will not be created based on the configured MLD SSM mappings.
To configure an MLD SSM mapping:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter MLD view. mld N/A
3. Configure an MLD SSM
mapping.
ssm-mapping ipv6-group-address
prefix-length ipv6-source-address No MLD mappings are configured
by default.
Configuring MLD proxying
Before you configure the MLD proxying feature, complete the following tasks:
• Enable IPv6 forwarding and configure an IPv6 unicast routing protocol so that all devices in the
domain are interoperable at the network layer.
• Enable IPv6 multicast routing.
Enabling MLD proxying
You can enable MLD proxying on the interface in the direction toward the root of the multicast forwarding
tree to make the device serve as an MLD proxy.