HPE 5820X Series, Руководство по настройке

Страница: 317 / 512

305
Figure 90 MLD snooping related ports
The following describes the ports involved in MLD snooping:
•
Router port
—Layer 3 multicast device-side port. Layer 3 multicast devices include designated
routers (DRs) and MLD querier. In Figure 90 , GigabitEthernet 1/0/1 of Switch A and Switch B
are router ports. A switch registers all its router ports in the router port list.
Do not confuse the "router port" in MLD snooping with the "routed interface" commonly known
as the "Layer 3 interface." The router port in MLD snooping is the Layer 2 interface.
•
Member port
—Multicast receiver-side port In Figure 90 , GigabitEthernet 1/0/2 and
GigabitEthernet 1/0/3 of Switch A and GigabitEthernet 1/0/2 of Switch B are member ports. A
switch registers all its member ports in its MLD snooping forwarding table.
Unless otherwise specified, router ports and member ports in this document include both static and
dynamic router ports and member ports.
NOTE:
An MLD snooping-enabled switch deems that the all its ports that receive MLD general queries with
the source address other than 0::0 or that receive IPv6 PIM hello messages are dynamic router
ports. For more information about IPv6 PIM hello messages, see "
Configuring IPv6 PIM ."
Aging timers for dynamic ports in MLD snooping
Timer Description
Expected message
before expiration Action after
expiration
Dynamic router
port aging timer.
When a port receives an
expected message, the switch
starts an aging timer. When the
timer expires, the dynamic
router port ages out.
MLD general query of
which the source
address is not 0::0 or
IPv6 PIM hello.
The switch removes this
port from its router port
list.
Dynamic member
port aging timer.
When a port dynamically joins
a multicast group, the switch
starts an aging timer for the
port. When the timer expires,
the dynamic member port ages
out.
MLD report message.
The switch removes this
port from the MLD
snooping forwarding
table.