HP FlexNetwork MSR 954 User Manual

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Figure 76 MLD snooping ports
Router ports
On an MLD snooping Layer 2 device, the ports toward Layer 3 multicast devices are called router
ports. In Figure 76, GigabitEthernet 1/0/1 of Switch A and GigabitEthernet 1/0/1 of Switch B are
router ports.
Router ports contain the following types:
•
Dynamic router port—When a port receives an MLD general query whose source address is
not 0::0 or receives an IPv6 PIM hello message, the port is added into the dynamic router port
list. At the same time, an aging timer is started for the port. If the port receives either of the
messages before the timer expires, the timer is reset. If the port does not receive either of the
messages when the timer expires, the port is removed from the dynamic router port list.
•
Static router port—When a port is statically configured as a router port, it is added into the
static router port list. The static router port does not age out, and it can be deleted only
manually.
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 ports
On an MLD snooping Layer 2 device, the ports toward receiver hosts are called member ports. In
Figure 76, GigabitEthernet 1/0/2 and GigabitEthernet 1/0/3 of Switch A and GigabitEthernet 1/0/2 of
Switch B are member ports.
Member ports contain the following types:
•
Dynamic member port—When a port receives an MLD report, it is added to the associated
dynamic MLD snooping forwarding entry as an outgoing interface. At the same time, an aging
timer is started for the port. If the port receives an MLD report before the timer expires, the timer
is reset. If the port does not receive an MLD report when the timer expires, the port is removed
from the associated dynamic forwarding entry.
•
Static member port—When a port is statically configured as a member port, it is added to the
associated static MLD snooping forwarding entry as an outgoing interface. The static member
port does not age out, and it can be deleted only manually.
Unless otherwise specified, router ports and member ports in this document include both static and
dynamic router ports and member ports.
Router A Switch A
Switch B
GE1/0/1 GE1/0/2
GE1/0/3
GE1/0/1
GE1/0/2
Receiver
Receiver
Host A
Host B
Host C
Host D
Source
IPv6 multicast packets
Router port
Member port

HP FlexNetwork MSR 954 Specifications

General

Brand	HP
Model	FlexNetwork MSR 954
Category	Network Router
Language	English