Querier Settings - EnGenius EWS Series User Manual

Querier Settings

IGMP Snooping requires that one central Switch to periodically query all end devices on the network to
announce their multicast memberships and this central device is the IGMP querier. The snooping Switch
sends out periodic queries with a time interval equal to the configured querier query interval. The IGMP
query keeps the Switch updated with the current multicast group membership information. If the Switch
does not received the updated membership information, then it will stop forwarding multicasts to
specified VLANs.
VLAN ID
Querier State
Querier Version
Robustness
Interval
Oper Interval
Max Response Interval
Oper Max Response
Interval
Last Member Query
Displays the VLAN ID.
Select whether to enable or disable the IGMP querier state for the
specified VLAN ID.
A querier can periodically ask their hosts if they wish to receive
multicast traffic. The querier feature will check whether hosts wish to
receive multicast traffic when enabled. An elected querier will assume
the role of querying the LAN for group members, and then propagates
the service requests on to any upstream multicast Switch to ensure
that it will continue to receive the multicast service. This feature is
only supported for IGMPv1 and v2 snooping.
Enter the version of IGMP packet that will be sent by this port. If an
IGMP packet received by the port has a version higher than the
specified version, this packet will be dropped.
Provides fine-tuning to allow for expected packet loss on a subnet. It is
used in calculating the following IGMP message intervals. The default
is 2.
Enter the amount of time in seconds between general query
transmissions. The default is 125 seconds.
Displays the IGMP Interval of the operational querier.
Enter the maximum response time used in the queries that are sent by
the snooping querier. The default is 10 seconds.
Display the maximum response time which used in the queries that
are sent by the snooping querier.
Enter the number of the operational last member querier.
125