The maximum query response time in seconds advertised in IGMP v2
queries on this VLAN if the switch is the querier. Smaller values
allow a switch to prune groups faster. So it is the maximum response
time inserted into the general periodic queries. This variable
enables the tuning of the burstiness of the IGMP traffic.
If it is increased the responses have a larger time span in which
to be generated by the hosts.
The default is 10 seconds and the range is 1 to 3598 seconds.