H3C Technologies H3C S5120 Series Switches - Manual (Page 339)

2-2
Figure 3-2 Port-based multicast VLAN
After the configuration, upon receiving an IGMP message on a user port, Switch A tags the message
with the multicast VLAN ID and relays it to the IGMP querier, so that IGMP Snooping can uniformly
manage the router ports and member ports in the multicast VLAN. 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 all the member ports in the multicast VLAN.
z For information about IGMP Snooping, router ports, and member ports, refer to IGMP Snooping
Configuration .
z For information about VLAN tags, refer to VLAN Configuration.
Multicast VLAN Configuration Task List
Complete the following tasks to configure multicast VLAN:
Task Remarks
Configuring User Port Attributes Required
Configuring Multicast VLAN Ports Required
Configuring Multicast VLAN
When configuring port-based multicast VLAN, you need to configure the attributes of each user port and
then assign the ports to the multicast VLAN.