XG700 User's Guide
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4.9 IGMP Snooping
IP multicast is often used to distribute multimedia data, including video and voice, over a network.
A general layer 2 switch floods multicast frames, causing absorption of unnecessary network bandwidth. A layer 3 switch that
supports Internet Group Management Protocol (IGMP) manages multicast groups using IGMP packets. The XG700 controls to
forward IP multi packets to required ports only by snooping IGMP packets between these layer 3 switches, preventing
unnecessary flooding. This function is called "IGMP Snooping".
The XG700 supports IGMP snooping for IGMP v1/v2/v3.
IGMP v3 does not support source IP addressing and filtering.
IGMP snooping and uplink filter function cannot be used at the same time.