H3C Technologies H3C S12500 Series Switches - Manual (Page 340)

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Figure 88 A sub-VLAN-based IPv6 multicast VLAN
After the configuration, MLD snooping manages router ports in the IPv6 multicast VLAN and member
ports in the sub-VLANs. When forwarding multicast data to Switch A, Router A needs to send only one
copy of multicast traffic to Switch A in the IPv6 multicast VLAN, and Switch A distributes the traffic to the
IPv6 multicast VLAN's sub-VLANs that contain receivers.
For more information about MLD snooping, router ports, and member ports, see "Configuring MLD
snooping."
For more information about VLAN tags, see Layer 2—LAN Switching Configuration Guide.
IPv6 multicast VLAN configuration task list
Task Remarks
Configuring an IPv6 multicast VLAN Required.
Setting the maximum number of forwarding entries for IPv6 multicast VLANs Optional.
Configuring an IPv6 multicast VLAN
Before you configure sub-VLAN-based IPv6 multicast VLAN, complete the following tasks:
• Enable IPv6 forwarding.
• Create VLANs as required.
• Enable MLD snooping in the VLAN to be configured as an IPv6 multicast VLAN.
By using this method, you configure a VLAN as an IPv6 multicast VLAN, and configure user VLANs as
sub-VLANs of the IPv6 multicast VLAN.
Configuration guidelines
• You cannot configure an IPv6 multicast VLAN on a device with IP multicast routing enabled.