Installation guide

Network Setup 4-163
4. Select Apply to save the changes to the Igmp Snoop Querier Global Config options.
5. Optionally, select a VLAN Index from amongst those listed, and select Edit to revise the following
parameters:
Interval (1 - 18000)
Secs
Configures the interval for group specific IGMP queries sent by the switch. Valid
range is 1 to 18000 seconds.
Enable Select this option to enable the Apply/Revert buttons in order to save an updated
configuration. Once a parameter has been enabled, the red “X” in the enabled
column of the Igmp Snoop Querier Vlan Config table displays a green checkmark,
designating the configuration as enabled.
Enable Select the enable checkbox to use this IGMP snoop querier configuration with the
VLAN listed. Once a parameter has been enabled, the red “X” in the enabled
column of the Igmp Snoop Querier Vlan Config table displays a green checkmark,
designating the configuration as enabled.
Version Define the igmpV1, igmpV2 or igmpV3 version from the drop-down menu.
Present TimeOut The snooping switch does not rely on IGMP group leave announcements to
determine when entries should be removed from the forwarding table. It
implements a last membership query mechanism (such as the router-side
functionality of the IGMP protocol as described in the IGMP and MLD
specifications) on all its non-router ports. Define a timeout value as required
between 60 - 300 seconds. Hosts that have silently opted out without sending a
leave message are discarded if they do not respond with join/reports on the next
query interval.
Max Response Time Defines the maximum response time for the switch to receive a report. If the switch
does not receive a report, it discards this port. If it receives a response from a
wireless client it updates it’s IGMP snoop table with the reported multicast group
membership. In case of IGMP reports from wired ports, it simply forwards to
multicast router ports, as IGMP snooping is conducted only for wireless clients and
all wired ports are flooded for multicast packets. Define a value between 1 - 25
seconds.