Edimax Technology ES-3124REM - Manual (Page 28)

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4.6 Filter Database
4.6.1 IGMP Snooping
This switch supports IP multicast, you can enable IGMP
protocol on web management’s switch settings advanced page,
then display the IGMP snooping information in this page, you
can view difference multicast group ,VID and member port here,
IP multicast addresses range from 224.0.0.0 through
239.255.255.255.
The Internet Group Management Protocol (IGMP) is an
internal protocol of the Internet Protocol (IP) suite. IP manages
multicast traffic by using switches, routers, and hosts that
support IGMP. Enabling IGMP allows the ports to detect IGMP
queries and report packets and manage IP multicast traffic
through the switch.
4.6.2 Static MAC Address
When you add a static MAC address, it remains in the switch's
address table, regardless of whether the device is physically
connected to the switch or not. This saves the switch from
having to re-learn a device's MAC address when the
disconnected or powered-off device is active on the network
again.