What is the function of the interval for sending Query messages on an S series switch?

For an S series switch, the interval for sending Query messages configured in a VLAN using the igmp-snooping query-interval command is used to:

- Control the interval at which Query messages are sent after the querier function is enabled in the VLAN.
- Calculate the aging time of dynamic member ports using the following formula:
Aging time = Robustness variable x Query interval + Maximum response time

Therefore, the interval is useful even when IGMP snooping querier is not enabled. In addition, you must configure the same interval on all devices when configuring IGMP snooping. Otherwise, some user-side interfaces may be incorrectly deleted, causing multicast forwarding interruption.

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