D-Link xStack Reference Manual page 139

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xStack DGS-3620 Series Layer 3 Managed Stackable Gigabit Switch Web UI Reference Guide
The fields that can be configured are described below:
Parameter
Query Interval (1-65535)
Max Response Time (1-
25)
Robustness Value (1-7)
Last Member Query
Interval (1-25)
Proxy Reporting Source
IP
Proxy Reporting State
Querier State
Fast Leave
State
Version
Click the Apply button to accept the changes made.
Click the <<Back button to discard the changes made and return to the previous page.
After clicking the Modify Router Port
Figure 5-59 IGMP Snooping Parameters Settings window
Description
Specify the amount of time in seconds between general query transmissions. The
default setting is 125 seconds..
Specify the maximum time in seconds to wait for reports from members. The
default setting is 10 seconds.
Provides fine-tuning to allow for expected packet loss on a subnet. The value of the
robustness value is used in calculating the following IGMP message intervals: By
default, the robustness variable is set to 2.
Specify the maximum amount of time between group-specific query messages,
including those sent in response to leave-group messages. You might lower this
interval to reduce the amount of time it takes a router to detect the loss of the last
member of a group.
Enter the proxy reporting source IP address.
Use the drop-down menu to enable and disable the proxy report state.
If the querier state is enabled, it allows the switch to be selected as an IGMP
Querier (sends IGMP query packets). If the state is disabled, then the switch can
not play the role as a querier.
NOTE: that if the Layer 3 router connected to the switch provides only the IGMP
proxy function but does not provide the multicast routing function, then this state
must be configured as disabled. Otherwise, if the Layer 3 router is not selected as
the querier, it will not send the IGMP query packet. Since it will not also send the
multicast-routing protocol packet, the port will be timed out as a router port.
Enable or disable the IGMP snooping fast leave function. If enabled, the
membership is immediately removed when the system receive the IGMP leave
message.
Select to enable or disable the global state.
Specify the version of IGMP packet that will be sent by this port. If an IGMP packet
received by the interface has a version higher than the specified version, this
packet will be forwarded from the router ports or VLAN flooding.
link, the following page will appear:
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