HP A8800 Configuration Manual page 300

Figure 79 MLD snooping related ports
Router A
Source
The following describes the ports involved in MLD snooping, as shown in
Router port—Layer 3 multicast device-side port. Layer 3 multicast devices include designated
•
routers and MLD queriers. In
ports. The router registers all its local router ports in its 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
•
GigabitEthernet 3/1/3 of Router B and GigabitEthernet 3/1/2 of Router C are member ports. The
router registers all the member ports on the local device 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 router 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
Aging timers for dynamic ports in MLD snooping
Timer
Dynamic router port
aging timer
Router B
GE3/1/1 GE3/1/2
GE3/1/3
GE3/1/1
GE3/1/2
Router C
Router port
Member port
IPv6 multicast packets
Figure
Description
When a port receives an
MLD general query with
the source address other
than 0::0 or an IPv6 PIM
hello, the router starts or
resets an aging timer.
When the timer expires,
the dynamic router port
ages out.
Receiver
Host A
Host B
Receiver
Host C
Host D
79, GigabitEthernet 3/1/1 of Router B and Router C are router
Figure 79, GigabitEthernet 3/1/2 and
"Configuring IPv6
Message before
expiration
MLD general query with
the source address other
than 0::0 or IPv6 PIM
hello.
288
Figure 79:
PIM."
Action after expiration
The router removes this
port from its router port
list.