HP 1920 Gigabit Ethernet Switch Series User Manual

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Figure 242 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 and MLD queriers. As shown in Figure 242, G
igabitEthernet 1/0/1 of Switch A and
GigabitEthernet 1/0/1 of Switch B are router ports. A switch records 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 a Layer 2 interface.
• Member port—Multicast receiver-side port. As shown in Figure 242, G
igabitEthernet 1/0/2 and
GigabitEthernet 1/0/3 of Switch A and GigabitEthernet 1/0/2 of Switch B are member ports. A
switch records all local member ports in its MLD snooping forwarding table.
Unless otherwise specified, router ports and member ports in this document include both dynamic and
static ports.
NOTE:
W
hen MLD snoopin
g
is enabled, all ports that receive IPv6 PIM hello messa
g
es or MLD
g
eneral queries
w
ith source addresses other than 0::0 are considered dynamic router ports.
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
When a port receives an MLD
general query with the source
address other than 0::0 or IPv6
PIM hello message, the switch
starts or resets 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 this
port from its router port
list.

HP 1920 Gigabit Ethernet Switch Series Specifications

General

Brand	HP
Model	1920 Gigabit Ethernet Switch Series
Category	Switch
Language	English