MicroNet SP3524A, User Manual

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4.9. Filter Database
IGMP Snooping
The 24 ports VDSL MANAGED SWITCH supports IP multicast, you can
enable IGMP protocol on web management’s switch setting advanced
page, then display the IGMP snooping information in this page, you can
view difference multicast group, VID and member port in 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.
IGMP have three fundamental types of message as follows:
Message Description
Query
A message sent from the carrier (IGMP router or
switch) asking for a response from each host
belonging to the multicast group.