HP FlexFabric 5700 Series Configuration Manual page 20

Figure 12 IGMP snooping related ports
The following describes the ports involved in IGMP snooping:
Router port—Layer 3 multicast device-side port. Layer 3 multicast devices include designated
•
routers (DRs) and IGMP queriers. In
Ten-GigabitEthernet 1/0/1 of Switch B are the router ports. A switch records all its router ports in
a router port list.
Do not confuse the "router port" in IGMP snooping with the "routed interface" commonly known as
the "Layer 3 interface." The router port in IGMP snooping is a Layer 2 interface.
Member port—Multicast receiver-side port. In
•
Ten-GigabitEthernet 1/0/3 of Switch A and Ten-GigabitEthernet 1/0/2 of Switch B are the
member ports. A switch records all its member ports in the IGMP 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:
When IGMP snooping is enabled, all ports that receive PIM hello messages or IGMP general queries with
the source addresses other than 0.0.0.0 are considered dynamic router ports.
Aging timers for dynamic ports in IGMP snooping
The following are aging timers for dynamic ports in IGMP snooping:
Dynamic router port aging timer—The switch starts this timer for a port that receives an IGMP
•
general query with the source address other than 0.0.0.0 or a PIM hello message. If the port does
not receive either of these messages before the timer expires, the switch removes the port from its
router port list.
• Dynamic member port aging timer—The switch starts this timer for a port that receives an IGMP
report. If the port does not receive a report before the timer expires, the switch removes the port from
the IGMP snooping forwarding entries.
NOTE:
In IGMP snooping, only dynamic ports age out. Static ports never age out.
Figure 12, Ten-GigabitEthernet 1/0/1 of Switch A and
Figure 12, Ten-GigabitEthernet 1/0/2 and
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