D-Link DSA-3200 Información técnica descargar pdf (Pagina 92)

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DGS-3200 Series Layer 2 Managed Gigabit Ethernet Switch Web UI Reference Guide

Parameter Description

MLD Snooping State

Click the radio button to enable or disable the MLD snooping state.

Max Learned Entry Value (1-

256)

Specify the maximum number of groups that can be learned by the data driven

mechanism.

VID

This is the VLAN ID that, along with the VLAN Name, identifies the VLAN for which

to modify the MLD Snooping Settings.

VLAN Name

This is the VLAN Name that, along with the VLAN ID, identifies the VLAN for which

to modify the MLD Snooping Settings.

State

Used to enable or disable MLD snooping for the specified VLAN. This field is

Disabled by default.

Click Apply to implement changes made. Click the Edit button to configure the MLD Snooping Parameters Settings.

Click the Modify Router Port link to configure the MLD Snooping Router Port Settings.

Click the Edit button to see the following window:

Figure 3 - 38. MLD Snooping Parameters Settings window

The following parameters can be configured:

Parameter Description

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 (1-7)

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.

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