CtrlVid
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Identifies the IGMP control entry's VLAN ID.
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QueryInterval
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The frequency (in seconds) at which IGMP host query packets are transmitted on the interface. The range is from 1 to 65535, and the default is 125.
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MaxResponseTime
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The maximum response time (in 1/10 seconds) advertised in IGMPv2 general queries on this interface. This value is not configurable for IGMPv1.
Smaller values allow a router to prune groups faster. The range is from 0 to 255, and the default is 100 tenth seconds (equal to 10 seconds).
Note: This value must be less than the QueryInterval.
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Robustness
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This parameter allows tuning for the expected packet loss of a network. This value is equal to the number of expected query packet losses per serial query interval, plus 1. If a network is expected to lose query packets, the robustness value should be increased.
The range is from 2 to 255, and the default is 2. The default value of 2 means that one query per query interval may be dropped without the querier aging out.
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LastMembQueryIntvl
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The maximum response time (in 1/10 seconds) that is inserted into group-specific queries sent in response to leave group messages. It is also the time between group-specific query messages. This value is not configurable for IGMPv1.
Decreasing the value reduces the time to detect the loss of the last member of a group. The range is from 0 to 255, and the default is 10 tenth seconds. Nortel Networks recommends configuring this parameter to values higher than 3. If a fast leave process is not required, Nortel recommends values above 10. (The value 3 is equal to 0.3 of a second and 10 is equal to 1.0 second).
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HostTimeout
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The timer value for sending IGMP query packet when none was sent by the host in the LAN. The timer works on a per-VLAN basis. The device sends the query message if the timer is expired. The range is 1 to 16711450 with a default of 260.
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RouteTimeout
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The amount of time a host must wait after hearing a Query before it may send any IGMPv2 messages. The default value is 260.
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LeaveTimer
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The frequency (in seconds?) at which a querier sends Group specific queries to group members when the querier receives a leave group message. The range is from 1 to 16711450 with a default of 1.
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QueryState
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The current operational state of the IGMP query (enabled or disabled).
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CurrentState
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The current state of the IGMP (querier or non-querier).
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CtrlState
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The current state of the IGMP (disabled or enabled) for this entry. To enable or disable the current state, click on the field and a selection box appears with the enable and disable options.
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