D-Link DGS-3620-52P Reference Manual page 123

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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
MLD Snooping State
Click the Apply button to accept the changes made for each individual section.
Click the Edit button to configure the MLD Snooping Parameters Settings for a specific entry.
Click the Modify Router Port
Enter a page number and click the Go button to navigate to a specific page when multiple pages exist.
After clicking the Edit button, the following page will appear:
The fields that can be configured are described below:
Parameter
Query Interval (1-
65535)
Max Response Time (1-
25)
Robustness Value (1-7)
Last Listener Query
Interval (1-25)
Figure 4-69 MLD Snooping Settings window
Description
Click the radio buttons to enable or disable the MLD snooping state.
link to configure the MLD Snooping Router Port Settings for a specific entry.
Figure 4-70 MLD Snooping Parameters Settings window
Description
Specify the amount of time in seconds between general query transmissions. The
default setting is 125 seconds.
The maximum time in seconds to wait for reports from listeners. The default setting
is 10 seconds.
Provides fine-tuning to allow for expected packet loss on a subnet. The value of the
robustness variable is used in calculating the following MLD message intervals:
Group listener interval - Amount of time that must pass before a multicast router
decides there are no more listeners of a group on a network.
Other Querier present interval - Amount of time that must pass before a multicast
router decides that there is no longer another multicast router that is the Querier.
Last listener query count - Number of group-specific queries sent before the router
assumes there are no local listeners of a group. The default number is the value of
the robustness variable.
By default, the robustness variable is set to 2. You might want to increase this value
if you expect a subnet to be loosely.
The maximum amount of time between group-specific query messages, including
those sent in response to done-group messages. You might lower this interval to
reduce the amount of time it takes a router to detect the loss of the last listener of a
group.
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