D-Link xStack DGS-3120 Series Reference Manual page 232

xStack® DGS-3120 Series Layer 3 Managed Gigabit Ethernet Switch Web UI Reference Guide
The fields that can be configured are described below:
Parameter
Version
State
Query Interval (1-
31744)
Max Response Time (1-
25)
Robustness Variable
(1-7)
Last Member Query
Interval (1-25)
Click the <<Back button to return to the previous window.
Click the Apply button to accept the changes made.
IGMP Subscriber Source Network Check Settings
This window is used to configure the flag that determines whether or not to check the subscriber source IP when an
IGMP report or leave message is received. When this option is enabled on an interface, any IGMP report or leave
messages received by the interface will be checked to determine whether its source IP is in the same network as
the interface. If the check failed for a received report or leave message, the message won't be processed by IGMP
protocol. If the check is disabled, the IGMP report or leave message with any source IP will be processed by the
IGMP protocol.
To view the following window, click L3 Features > IP Multicast Routing Protocol > IGMP > IGMP Subscriber
Source Network Check Settings, as shown below:
The fields that can be configured are described below:
Figure 5-94 IGMP Interface Settings – Edit window
Description
Use the drop-down menu to select the IGMP version that will be used to interpret IGMP
queries on the interface. The default is 3.
Use the drop-down menu to enables or disables IGMP for the IP interface. The default
is Disabled.
Enter a value between 1 and 31744 seconds, with a default of 125 seconds. This
specifies the length of time between sending IGMP queries.
Enter a value between 1 and 25 to specify the maximum amount of time allowed before
sending an IGMP response report. The default time is 10 seconds.
A tuning variable to allow for subnetworks that are expected to lose a large number of
packets. A value between 1 and 7 can be entered, with larger values being specified for
subnetworks that are expected to lose larger numbers of packets. The default setting is
2.
Enter a value between 1 and 25 to specify the maximum amount of time between
group-specific query messages, including those sent in response to leave group
messages. The default is 1 second.
Figure 5-95 IGMP Subscriber Source Network Check Settings window
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