D-Link xStack DGS-3426P User Manual - Mld Router Port Settings

xStack DGS-3400 Series Layer 2 Gigabit Ethernet Managed Switch 

Done Timer 

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. 

The user may specify a time between 

1

 and 

16711450 

with a default setting of 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 Non-

Querier, 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. 

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. 

MLD Router Port Settings  

The following window is used to designate a port or range of ports as being connected to multicast enabled routers. When IPv6 

routing control packets, such as DVMRP, OSPF or RIP, or MLD Query packets are found in an Ethernet port or specified VLAN, 

the Switch will set these ports as dynamic router ports. Once set, this will ensure that all packets with a multicast router as its 

destination will arrive at the multicast-enabled router, regardless of protocol. If the Router’s Aging Time expires and no routing 

control packets or query packets are received by the port, that port will be removed from being a router port. 

To configure the settings for MLD Router Ports, click 

L2 Features > MLD Snooping > MLD Router Port Settings

, which will 

open the following window. 

Figure 7- 33. Router Port Settings window for MLD 

To configure the router ports settings for a specified VLAN, click its corresponding 

 button, which will produce the 

following window for the user to configure. 

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