HP 6125XLG R2306-HP 6125XLG Blade Switch IP Multicast Configuration Guide - Page 21

Figure 11 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 Figure 11, Ten-GigabitEthernet 1/1/5 of Switch A and Ten-GigabitEthernet 1/1/5 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 Figure 11, Ten-GigabitEthernet 1/1/6 and Ten-GigabitEthernet 1/1/7 of Switch A and Ten-GigabitEthernet 1/1/6 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. For more information about PIM hello messages, see "Configuring PIM." Aging timers for dynamic ports in IGMP snooping Timer Dynamic router port aging timer Description Message received before Action after the timer the timer expires expires When a port receives an IGMP general query with the source address other than 0.0.0.0 or a PIM hello message, the switch starts or resets an aging timer for the port. When the timer expires, the dynamic router port ages out. IGMP general query with the source address other than 0.0.0.0 or PIM hello message. The switch removes the port from its router port list. 14