Инструкция для ZYXEL GS1920-48

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Chapter 23 Multicast

GS1920 Series User’s Guide

178

23.5.3

MLD Snooping-proxy VLAN Port Role Setting

Click the Port Role Setting link in the Advanced Application > Multicast > IPv6 Multicast >
MLD Snooping-proxy > VLAN screen to display the screen as shown.

Robustness Variable

Enter the number of queries. A multicast address entry (learned only on an
upstream port by snooping) is removed from the forwarding table when there is
no response to the configured number of queries sent by the router connected to
the upstream port. This value should be exactly the same as what’s configured in
the connected multicast router.

This value is used to calculate the amount of time an MLD snooping membership
entry (learned only on the upstream port) can remain in the forwarding table.

Last Member Query
Interval

Enter the amount of time (in miliseconds) between the MLD group-specific
queries sent by an upstream port when an MLD Done message is received. This
value should be exactly the same as what’s configured in the connected
multicast router.

This value is used to calculate the amount of time an MLD snooping membership
entry (learned only on the upstream port) can remain in the forwarding table
after a Done message is received.

When an MLD Done message is received, the Switch sets the entry’s lifetime to
be the product of Last Member Query Interval and Robustness Variable.

Downstream

Query Interval

Enter the amount of time (in miliseconds) between general query messages sent
by the downstream port.

Maximum Response Delay

Enter the maximum time (in miliseconds) that the Switch waits for a response to
a general query message sent by the downstream port.

Add

Click this to create a new entry or to update an existing one.

This saves your changes to the Switch’s run-time memory. The Switch loses
these changes if it is turned off or loses power, so use the Save link on the top
navigation panel to save your changes to the non-volatile memory when you are
done configuring.

Cancel

Click Cancel to reset the fields to your previous configuration.

Clear

Click Clear to reset the fields to the factory defaults.

Index

This is the index number of the MLD snooping-proxy VLAN entry in the table.
Click on an index number to view more details or change the settings.

VID

This field displays the ID number of the VLAN group.

Delete

Check the entry(ies) that you want to remove in the Delete column.

Delete

Click Delete to remove the entry selected in the Delete column permanently.