Configuring IGMP Snooping Queriers
D-Link Unified Wired and Wireless Access System
Oct. 2015 Page 222
D-Link UWS User Manual
Configuring IGMP Snooping Queriers
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 multicast 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 page to enable or disable the IGMP Snooping Querier feature, specify the IP address of the router to
perform the querying, and configure related parameters. Users must have Read/Write access privileges to
change the data on this page.
To access this page, click LAN > L2 Features> IGMP Snooping Querier > IGMP Snooping Querier Configuration
in the navigation tree.
Figure 127: IGMP Snooping Querier Configuration
Table 111: IGMP Snooping Querier Configuration Fields
Field Description
Snooping Querier Admin
Mode
Select the administrative mode for IGMP Snooping for the switch from the
pulldown menu. The default is Disable.
Snooping Querier Address Specify the Snooping Querier Address to be used as source IP address in
periodic IGMP queries. This address is used when no address is configured on
the VLAN on which query is being sent.
IGMP Version Specify the IGMP protocol version used in periodic IGMP queries.
Query Interval Specify the time interval in seconds between periodic queries sent by the
snooping querier. The Query Interval must be a value in the range of 1 and
1800 seconds. The default value is 60 seconds.
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