PLANET ADN-4100 - Manual (Page 72)

IGMP proxy enables the device to issue IGMP host messages on behalf of hosts
that the system discovered through standard IGMP interfaces. The device serves
as a proxy for its hosts after you enable the function.
Select Enable IGMP Proxy and select the desired WAN and click Apply to save
the settings.
3.3.10.3 IGMP Snooping
When IGMP snooping is enabled, only hosts that belong to the group receive the
multicast packets. If a host is deleted from the group, the host cannot receive the
multicast packets any more.
In the NETWORK TOOLS page, click IGMP Snooping. The page as shown in
the following figure appears:
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