3com S7906E 설치 설명서

 

1-2 

As shown in 

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

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

VLAN, and enable IGMP Snooping in the multicast VLAN.  

Figure 1-2 Sub-VLAN-based multicast VLAN 

Router A

Switch A

Host A

Host B

Host C

 Multicast packets

VLAN 2

VLAN 3

VLAN 4

VLAN 10 (Multicast VLAN)

 

 

After the configuration, IGMP Snooping manages router ports in the 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 multicast VLAN, and Switch A distributes the traffic to the 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 

(ports with attached hosts) on Switch A are hybrid ports. On Switch A, configure VLAN 10 as a multicast 

VLAN, assign all the user ports to this multicast VLAN, and enable IGMP Snooping in the multicast 

VLAN and all the user VLANs.  

Figure 1-3 Port-based multicast VLAN