2-9Configuring IGMP Snooping Port FunctionsConfiguration PrerequisitesBefore configuring IGMP snooping port functions, complete the following tasks:z Enable IGMP snooping in the VLANz Configure the corresponding port groups.Before configuring IGMP snooping port functions, prepare the following data:z Aging time of dynamic router ports,z Aging time of dynamic member ports, andz Multicast group and multicast source addressesConfiguring Aging Timers for Dynamic PortsIf the switch receives no IGMP general queries or PIM hello messages on a dynamic router port, theswitch removes the port from the router port list when the aging timer of the port expires.If the switch receives no IGMP reports for a multicast group on a dynamic member port, the switchremoves the port from the outgoing port list of the forwarding table entry for that multicast group whenthe aging timer of the port for that group expires.If multicast group memberships change frequently, you can set a relatively small value for the dynamicmember port aging timer, and vice versa.Configuring aging timers for dynamic ports globallyFollow these steps to configure aging timers for dynamic ports globally:To do... Use the command... RemarksEnter system view system-view —Enter IGMP snooping view igmp-snooping —Configure dynamic router portaging time router-aging-time interval Optional105 seconds by defaultConfigure dynamic memberport aging time host-aging-time interval Optional260 seconds by defaultConfiguring aging timers for dynamic ports in a VLANFollow these steps to configure aging timers for dynamic ports in a VLAN:To do... Use the command... RemarksEnter system view system-view —Enter VLAN view vlan vlan-id —Configure dynamic router portaging timeigmp-snoopingrouter-aging-time intervalOptional105 seconds by defaultConfigure dynamic memberport aging timeigmp-snoopinghost-aging-time intervalOptional260 seconds by default
