American Fibertek SM9p - Manual (Page 108)

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Report
A message sent by a host to the querier to indicate that the host
wants to be or is a member of a given group indicated in the
report message.
Leave
Group
A message sent by a host to the querier to indicate that the host
has quit being a member of a specific multicast group.
IGMP Configuration
The switch support IP multicast, you can enable IGMP protocol. IP multicast addresses
range from 224.0.0.0 through 239.255.255.255.
 IGMP Protocol: enable or disable the IGMP protocol.
 IGMP Query: enable or disable the IGMP query function. The IGMP query
information will be display in IGMP status section.