Allied Telesis AT-S105 - Manual (Page 117)

AT-S105 Management Software Web Browser User’s Guide
117
Without IGMP snooping, a switch floods multicast packets from all of its
ports, except the port on which it received the packet. Such flooding of
packets can negatively impact network performance.
The AT-FS750/24POE and AT-FS750/48 switches maintain a list of
multicast groups through an adjustable time out value, which controls how
frequently it expects to see reports from end nodes that want to remain
members of multicast groups, and by processing leave requests.
Note
By default, IGMP snooping is disabled on the switch.