Configuration Guide Configuring IGMP Snooping
Deployment
Configure the multicast-to-unicast conversion function.
The function is available only in wireless multicast scenarios.
10.3 Features
Basic Concepts
Multicast Router Ports and Member Ports
IGMP snooping is VLAN-based. The ports involved refer to the member ports within the VLAN.
The device running IGMP snooping identifies the ports within the VLAN as a multicast router port or member port so as to
manage and control the forwarding of IP multicast traffic within the VLAN. As shown in the following figure, when IGMP
snooping is run on a Layer-2 device, multicast traffic enters the multicast router port and exits from the member ports.
Figure 10-5 Networking Topology of Two IGMP Snooping Ports
Multicast router port: The location of the multicast source is directed by the port on the Layer-2 multicast device which is
connected to the multicast router (Layer-3 multicast device: By listening to IGMP packets, the Layer-2 multicast device
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