ZyXEL Communications XGS2220 Series, Руководство пользователя

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Chapter 45 Multicast
XGS2220 Series User’s Guide
297
The following table describes the fields in the above screen.
Table 146 SWITCHING > Multicast > IPv6 Multicast > VLAN > Add/Edit
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 is
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 is 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.
Apply Click Apply to save 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.
Clear Click Clear to clear the fields to the factory defaults.
Cancel Click Cancel to not save the configuration you make and return to the last screen.