Allied-telesis AT-S84 Manual do Utilizador Página 139

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AT-S84 Management Software User’s Guide
Section II: Menus Interface 139
restricting the flow of multicast packets only to those switch ports
connected to host nodes.
Without IGMP snooping a switch would have to flood multicast packets out
all of its ports, except the port on which it received the packet. Such
flooding of packets can negatively impact switch and network
performance.
The switch maintains its list of multicast groups through an adjustable
timeout 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.
By default, IGMP snooping is disabled on the switch.
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