3com S7906E 설치 설명서

 

1-2 

multicast VLAN instead of making a separate copy of the multicast traffic in each user VLAN. This saves 

the network bandwidth and lessens the burden of the Layer 3 device. 

The IPv6 multicast VLAN feature can be implemented in two approaches, as described below: 

As shown in 

, Host A, Host B and Host C are in three different user VLANs. On Switch A, 

configure VLAN 10 as an IPv6 multicast VLAN, configure all the user VLANs as sub-VLANs of this IPv6 

multicast VLAN, and enable MLD snooping in the IPv6 multicast VLAN.  

Figure 1-2 Sub-VLAN-based IPv6 multicast VLAN 

Router A

Switch A

Host A

Host B

Host C

 IPv6 Multicast packets

VLAN 2

VLAN 3

VLAN 4

VLAN 10 (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.  

As shown in 

, Host A, Host B and Host C are in three different user VLANs. All the user ports 

are hybrid ports. On Switch A, configure VLAN 10 as an IPv6 multicast VLAN, assign all the user ports 

to this IPv6 multicast VLAN, and enable MLD Snooping in the IPv6 multicast VLAN and all the user 

VLANs.