H3C S9500 Series Operation Manual page 5

Operation Manual – MLD Snooping
H3C S9500 Series Routing Switches
Router port: A router port is a port on a Layer 2 switch that leads the switch to a
multicast router (Layer-3 multicast device) or the MLD querier on the subnet. In the
figure, Ethernet 1/1/10 of Switch A and Ethernet 1/1/10 of Switch B are router ports.
A switch registers all its local router ports (including dynamic and static router
ports) in its router port list.
Member port: A member port (also known as IPv6 multicast group member port or
Listener Port) is a port on a Layer 2 switch that leads the switch to an IPv6
multicast group member. In the figure, Ethernet 1/1/1 and Ethernet 1/1/2 of Switch
A and Ethernet 1/1/1 of Switch B are member ports. The switch records all
member ports (including dynamic and static member ports) on the local device in
the MLD Snooping forwarding table.
Note:
Whenever mentioned in this document, a router port is a router-side port on a switch,
rather than a port on a router.
On an MLD-snooping-enabled switch, the ports that received MLD general queries
with the source address other than 0::0 or IPv6 PIM hello messages are dynamic
router ports. For details about IPv6 PIM hello messages, see IPv6 PIM
Configuration of the IP Multicast Volume.
II. Dynamic port aging timers in MLD Snooping
Table 1-1 Dynamic port aging timers in MLD Snooping and related messages and
actions
Timer
Dynamic router
port aging timer
Dynamic member
port aging timer
Description
For each dynamic
MLD general
router port, the
query of which the
switch sets a timer
source address is
initialized to the
not 0::0 or IPv6
dynamic router
PIM hello
port aging time
When a port
dynamically joins
an IPv6 multicast
group, the switch
MLD report
sets a timer for the
message
port, which is
initialized to the
dynamic member
port aging time.
1-3
Chapter 1 MLD Snooping Configuration
Message before
expiry
The switch
removes this port
from its router port
list
The switch
removes this port
from the MLD
Snooping
forwarding table
Action after
expiry