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DES-7200 Configuration Guide Chapter 8 IGMP Snooping
Configuration
8-3
Figure 2 IGMP Snooping Port Type
Multicast Router Port: the switch is connected with the multicast router(the Layer3
multicast device), take the SwitchA interface Eth0/1 for example. All router ports
on the switch(including the dynamic and static ports) are recorded in the router
port list. By default, the router port corresponds to the recipient of the multicast
data in the VLAN, and can also be added to the IGMP Snooping forwarding list.
Member Port: the abbreviation of the IP multicast group member port, also named
Listener Port, representing the port connected with the IP multicast group
member on the switch, take the SwitchA interface Eth0/2, Eth0/3 and Eth0/4 for
example. All member ports on the switch(including the dynamic and static ports)
are recorded in the IGMP Snooping forwarding list.
8.1.3 Understanding the Aging Timer of Dynamic Port
Table-1 Aging timer of dynamic port
Type Description
Events
triggering timer
Activity after
timeout
Aging timer
for the
dynamic
router port
Enable a timer for
each dynamic router
port. The timeout time
is the aging time of
the dynamic router
port.
Receive the
IGMP general
query packet or
the IP PIM Hello
packet.
Remove the port
from the router
port list.
Aging timer
for the
dynamic
member port
Enable a timer for
each dynamic
member port. The
timeout time is the
aging time of the
dynamic member
port.
Receive the
IGMP query
packet.
Remove the port
from the IGMP
Snooping
multicast group
forwarding list.