15.2.5 IGMP timer

The following table describes the IGMPv2 timer values used by the Switch.

Table 15-4 IGMPv2 Timer value
Timer	Description	Default value (seconds)	Setting range of this machine (seconds)
Query Interval	Membership Query sending interval time	125	-
Query Response Interval	Maximum response wait time for Membership Reports	10	-
Other Querier Present Interval	Querier monitoring interval	255	2 x Query Interval + Query Response Interval/2
Group Membership Interval	Group member retention time	260	2 x Query Interval + Query Response Interval
Startup Query Interval	Interval for sending a General Query message during startup	30	-
Last Member Query Interval	Interval for sending a Specific Query message after receiving a leave request message	1	-
Last Member Query Time	Retention time of group members when a detachment request is received	3	0~3600

Legend:-: Not applicable

The following table describes the IGMPv3 timer values used by the Switch.

Table 15-5 IGMPv3 Timer value
Timer	Description	Default value (seconds)	Setting range of this machine (seconds)
Query Interval^#1	Membership Query sending interval time	125	-
Query Response Interval	Multicast Membership Report maximum response wait time	10	-
Other Querier Present Interval	Querier monitoring interval	255	Robustness Variable^#2NGQuery Interval + Query Response Interval/2
Startup Query Interval	Interval for sending a General Query message during startup	30	-
Last Member Query Interval	Interval for sending a Specific Query message after receiving a leave request message	1	-
Group Membership Interval^#3	Group member retention time	260	Robustness Variable^#2NGQuery Interval + Query Response Interval
Last Member Query Time	Retention time of group members when a detachment request is received	2	Robustness Variable^#2NGLast Member Query Interval To set in configuration, 0 to 3600 *4
Older Host Present Interval	Time for switching to IGMPv3 multicast address compatibility mode	260	Robustness Variable^#2NGQuery Interval + Query Response Interval

Legend:-: Not applicable

Note #1: Query Interval is 125 seconds when the Switch is Querier and Query Interval is non-Querier. For an interface for which multihoming is set, Query Interval is retained for each network that is set for the interface.
Note #2: When Robustness Variable is Querier, it follows Robustness Variable of Querier when it is 2,non-Querier.
Note #3: For an interface for which multihoming has been set, the longest Group Membership Interval calculated for each network is used as Group Membership Interval for the applicable interface.
Note #4: If set in the configuration, the setting value of the configuration takes precedence.