Netgear GSM7224v2 - 24-Port Layer 2 Managed Gigabit Switch ユーザーズマニュアル

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Chapter 3.  Configuring Switching Information 
 
ProSafe® Gigabit L3 Managed Stackable Switches Software Administration Manual 
IGMP Snooping Querier
IGMP snooping requires that one central switch or router periodically query all end-devices 
on the network to announce their multicast memberships. This central device is the IGMP 
querier. The IGMP query responses, known as IGMP reports, keep the switch updated with 
the current multicast group membership on a port-by-port basis. If the switch does not 
receive updated membership information in a timely fashion, it will stop forwarding multicasts 
to the port where the end device is located.
These pages enable you to configure and display information on IGMP snooping queriers on 
the network and, separately, on VLANs.
IGMP Snooping Querier Configuration
Use this menu to configure the parameters for IGMP Snooping Querier. Note that only a user 
with Read/Write access privileges may change the data on this screen. 
To access this page, click Switching
 Multicast 
 IGMP Snooping 
 Querier Configuration.