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 GS728TS, GS728TPS, GS752TS, and GS752TPS Gigabit Smart Switches
1.  Click Add to add a Querier on the specified VLAN.
2.  Click Delete to delete a Querier on the specified VLAN.
3.  Click Apply to apply the new settings to the switch. Configuration changes take effect 
immediately
4.  Click Cancel to cancel the configuration on the screen and reset the data on the screen to 
the latest value of the switch.
Querier VLAN Address Specify the Snooping Querier Address to be used as source address in 
periodic MLD queries sent on the specified VLAN.
Operational State Specifies the operational state of the IGMP Snooping Querier on a VLAN:
• Querier: The snooping switch is the querier in the VLAN. The snooping 
switch will send out periodic queries with a time interval equal to the 
configured querier query interval. If the snooping switch sees a better 
querier (numerically lower) in the VLAN, it moves to non-querier mode.
• Non-Querier: The snooping switch is in non-querier mode in the VLAN. 
If the querier expiry interval timer expires, the snooping switch moves into 
querier mode.
•  Disabled: The snooping Querier is not operational on the VLAN. The 
Snooping Querier moves to disabled mode when MLD Snooping is not 
operational on the VLAN or when the querier address is not configured or 
the network management address is also not configured.
Operational Version Displays the MLD protocol version of the operational querier.
Last Querier Address Displays the IP address of the last querier from which a query was snooped 
on the VLAN.
Last Querier Version Displays the MLD protocol version of the last querier from which a query was 
snooped on the VLAN.
Operational Max Response 
Time
Displays the maximum response time to be used in the queries that are sent 
by the snooping querier.
Field Description