R21xx-HP FlexFabric 11900 IP Multicast Configuration Guide

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Figure 36 MLD snooping related ports
The following describes the ports involved in MLD snooping, as shown in Figure 36:
• Router port—Layer 3 multicast device-side port. Layer 3 multicast devices include designated
routers and MLD queriers. In Figure 36, T
en-GigabitEthernet 1/0/1 of Switch A and Switch B are
the router ports. A switch records all its local 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 a Layer 2 interface.
• Member port—Multicast receiver-side port. In Figure 36, T
en-GigabitEthernet 1/0/2 and
Ten-GigabitEthernet 1/0/3 of Switch A and Ten-GigabitEthernet 1/0/2 of Switch B are member
ports. A switch records all its local 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:
MLD snooping considers all ports that receive IPv6 PIM hello messages or MLD
g
eneral queries with the
source addresses other than 0::0 as 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
Message received
before the timer
ex
p
ires
Action after the timer
expires
Dynamic
router port
aging timer.
For each dynamic router port, the
switch sets an aging timer. When the
timer expires, the dynamic router port
ages out.
MLD general query with
the source address other
than 0::0 or IPv6 PIM
hello message.
The switch removes the
port from its router port
list.