ZyXEL Communications XS1920 Series, Руководство пользователя

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Chapter 24 Multicast
XS1920 Series User’s Guide
198
The following table describes the fields in the above screen.
Table 88
Advanced Application > Multicast > IPv6 Multicast > MLD Snooping-proxy > VLAN
LABEL DESCRIPTION
VID Enter the ID number of the VLAN on which you want to enable MLD snooping-
proxy and configure related settings.
Upstream
Query Interval Enter the amount of time (in miliseconds) between general query messages 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.
When an MLD Report message is received, the Switch sets the timeout period of
the entry to be T = (QI*RV) + MRD, where T = Timeout, QI = Query Interval, RV
= Robustness Variable, and MRD = Maximum Response Delay.
Maximum Response Delay Enter the amount of time (in miliseconds) the router connected to the upstream
port waits for a response to an MLD general query message. 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.
When an MLD Report message is received, the Switch sets the timeout period of
the entry to be T = (QI*RV) + MRD, where T = Timeout, QI = Query Interval, RV
= Robustness Variable, and MRD = Maximum Response Delay.
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 .
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.