D-Link DGS-3426P Product Manual - Page 185

xStack® DGS-3400 Series Layer 2 Gigabit Ethernet Managed Switch response for MLD port listeners. The Max Response Time field allows an entry between 1 and 25 (seconds). Default = 10. Robustness Variable (1-255) Provides fine-tuning to allow for expected packet loss on a subnet. The user may choose a value between 1 and 255 with a default setting of 2. If the packet loss rate in a subnet is expected to be high, the user may wish to increase this interval. Last Listener Query Interval (1-25) The maximum amount of time to be set between group-specific query messages. This interval may be reduced to lower the amount of time it takes a router to detect the loss of a last listener group. The user may set this interval between 1 and 25 seconds with a default setting of 1 second. Version (1-2) Configure the MLD version of the query packet which will be sent by the router. Node Timeout (1-16711450) Specifies the link node timeout, in seconds. After this timer expires, this node will no longer be considered as listening node. Default setting is 260 seconds. Router Timeout (1-16711450) Specifies the maximum amount of time a router can remain in the Switch's routing table as a listening node of a multicast group without the Switch receiving a node listener report. Default setting is 260 seconds. Done Timer (1-6375) Specifies the maximum amount of time a router can remain in the Switch after receiving a done message from the group without receiving a node listener report. Default setting is 2 seconds. Querier State Choose Enabled to enable transmitting MLD Snooping Query packets or Disabled to disable. The default is Disabled. Querier Router Behavior This read-only field describes the current querier state of the Switch, whether Querier, which will send out Multicast Listener Query Messages to links, or NonQuerier, which will not send out Multicast Listener Query Messages. State Used to enable or disable MLD snooping for the specified VLAN. This field is Disabled by default. Fast Done This parameter allows the user to enable the fast done function. Enabled, this function will allow members of a multicast group to leave the group immediately when a done message is received by the Switch. Data Driven Learning State Select Enabled or Disabled for data driven learning status. Data Driven Learning Aged Out Use the pull-down menu to enable or disable the aging out of the entry. Data Driven Group Expiry Time (1-65535) Specify the data driven group lifetime in seconds. This parameter is valid only when Data Driven Learning Aged Out is Enabled. NOTE: The robustness variable of the MLD snooping querier is used in creating the following MLD message intervals: Group Listener Interval - The amount of time that must pass before a multicast router decides that there are no more listeners present of a group on a network. Calculated as (robustness variable * query interval ) + (1 * query interval). Querier Present Interval - The amount of time that must pass before a multicast router decides that there are no other querier devices present. Calculated as (robustness variable * query interval) + (0.5 * query response interval). Last Listener Query Count - The amount of group-specific queries sent before the router assumes there are no local listeners in this group. The default value is the value of the robustness variable. Click Apply to implement changes made. Click the Show All MLD Snooping Entries link to return to the MLD Snooping Settings window. 176