96
Figure 30
Port-based IPv6 multicast VLAN
After the configuration, if Switch A receives an MLD message on a user port, it tags the message with the
IPv6 multicast VLAN ID and relays it to the MLD querier, so that MLD snooping can uniformly manage the
router ports and member ports in the IPv6 multicast VLAN. When Router A forwards multicast data to
Switch A, it sends only one copy of multicast data to Switch A in the IPv6 multicast VLAN, and Switch A
distributes the data to all member ports in the IPv6 multicast VLAN.
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
Configuration task
Remarks
Configuring user port attributes
Required.
Configuring IPv6 multicast VLAN ports
Required.
Configuring a port-based IPv6 multicast VLAN
When you configure a port-based IPv6 multicast VLAN, you need to configure the attributes of each user
port and then assign the ports to the IPv6 multicast VLAN.
A user port can be configured as a multicast VLAN port only if it is an Ethernet port or Layer 2 aggregate
interface.
In Ethernet interface view or Layer 2 aggregate interface view, configurations that you make are effective
only on the current interface. In port group view, configurations that you make are effective on all ports
in the current port group.
Configuration prerequisites
Before you configure a port-based IPv6 multicast VLAN, complete the following tasks:
•
Enable IPv6 forwarding.
Source
VLAN 2
VLAN 3
VLAN 4
Eth1/0/1
Eth1/0/2
Eth1/0/3
Eth1/0/4
Switch A
IPv6 Multicast packets
Receiver
Host A
Receiver
Host B
Receiver
Host C
Router A
MLD querier
VLAN 10 (IPv6 Multicast VLAN)
