HP 6125G HP 6125G & 6125G/XG Blade Switches IP Multicast Configuration - Page 218
Aging timers for dynamic ports in MLD snooping and related messages and actions
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Figure 60 MLD snooping related ports Ports involved in MLD snooping, as shown in Figure 60, are described as follows: • Router port-Layer 3 multicast device-side port. Layer 3 multicast devices include designated routers (DRs) and MLD querier. In the figure, GigabitEthernet 1/0/1 of Switch A and GigabitEthernet 1/0/1 of Switch B are router ports. The switch registers all its router ports in its router port list. 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 the Layer 2 interface. • Member port-Multicast receiver-side port. In the figure, GigabitEthernet 1/0/2 and GigabitEthernet 1/0/3 of Switch A and GigabitEthernet 1/0/2 of Switch B are member ports. The switch registers all its member ports in its MLD 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: An MLD snooping-enabled switch deems that the all its ports that receive MLD general queries with the source address other than 0::0 or that receive IPv6 PIM hello messages are dynamic router ports. For more information about IPv6 PIM hello messages, see "Configuring IPv6 PIM." Aging timers for dynamic ports in MLD snooping and related messages and actions Timer Dynamic router port aging timer Dynamic member port aging timer Description Message before expiry Action after expiry For each dynamic router port, the switch starts an aging timer. When the timer expires, the dynamic router port ages out. MLD general query of which the source address is not 0::0 or IPv6 PIM hello. The switch removes this port from its router port list. When a port dynamically joins a multicast group, the switch starts an aging timer for the port. When the timer expires, the dynamic member port ages out. MLD report message. The switch removes this port from the MLD snooping forwarding table. 207
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