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DES-3028 DES-3028P DES-3028G DES-3052 DES-3052P Layer 2 Fast Ethernet Managed Switch

setting of

260

seconds.

Done Timer (1-16711450 sec)

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

and

16711450

with a default setting of 2

seconds.

Querier State

This read-only field describes the current querier state.

Querier Router Behavior

This read-only field describes the current querier router behavior of the Switch.
The Non-Querier state 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.

Version

This field displays the version number.

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 response 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 Snooping 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 OSPFv3 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 Snooping Router Port Settings

which will open the following window.

Figure 7- 32. MLD Snooping Router Port Settings window

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

Modify

button, which will produce the

following window for the user to configure.

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