D-Link DGS-3620-52P Web UI Reference Guide - Page 123

xStack® DGS-3620 Series Layer 3 Managed Stackable Gigabit Switch Web UI Reference Guide Figure 4-69 MLD Snooping Settings window The fields that can be configured are described below: Parameter Description MLD Snooping State Click the radio buttons to enable or disable the 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 link to configure the MLD Snooping Router Port Settings for a specific entry. 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: Figure 4-70 MLD Snooping Parameters Settings window The fields that can be configured are described below: Parameter Description Query Interval (165535) Max Response Time (125) Robustness Value (1-7) Last Listener Query Interval (1-25) 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. 113