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Allied Telesis AT-S87 User Manual

Page 91

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AT-S87 Management Software User’s Guide

91

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.

By default, IGMP snooping is disabled on the switch.