D-Link DGS-3200-10 Product Manual - Page 111
MLD Snooping Parameters Settings window, Max Response Time 1-25
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xStack® DGS-3200 Series Layer 2 Gigabit Ethernet Managed Switch State Used to enable or disable MLD snooping for the specified VLAN. This field is Disabled by default. To configure a specific VLAN for MLD Snooping, click the VLAN's corresponding Edit button. The following window appears: Figure 3 - 38. MLD Snooping Parameters Settings window Configure the parameters as described below: Parameter Description VLAN ID This is the VLAN ID that, along with the VLAN Name, identifies the VLAN the user wishes to modify the MLD Snooping Settings for. VLAN Name This is the VLAN Name that, along with the VLAN ID, identifies the VLAN the user wishes to modify the MLD Snooping Settings for. Query Interval (1-65535 sec) This parameter is used to specify the amount of time in seconds between general query transmissions. Default: 125 seconds. Max Response Time (1-25 sec) This parameter is used to specify the maximum amount of time in seconds to wait for reports from listeners. Default: 10 seconds. Robustness Variable (1-255) This parameter is used to provide fine-tuning that allows for expected packet losses 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. This interval is calculated as follows: (robustness variable * query interval) + (1 * query response interval). 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. This interval is calculated as follows: (robustness variable * query interval) + (0.5 * query response interval). 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 lose a high number of packets. 98