Operation Manual – Multicast ProtocolH3C S3610&S5510 Series Ethernet Switches Chapter 2 IGMP Snooping Configuration2-12II. Configuring the fast leave feature on a port or a group portsFollow these steps to configure the fast leave feature on a port or a group ports:To do... Use the command... RemarksEnter system view system-view —EnterEthernetport viewinterface interface-typeinterface-numberEnterthecorrespondingviewEnter portgroupviewport-group { manual port-group-name| aggregation agg-id }Use eithercommandEnable the fastleave featureigmp-snooping fast-leave [ vlanvlan-list ]RequiredDisabled by defaultCaution:If the fast leave feature is enabled on a port to which more than one host is connected,when one host leaves a multicast group, the other hosts connected to port andinterested in the same multicast group will fail to receive multicast data for that group.2.4.5 Configuring IGMP Report SuppressionWhen a Layer 2 device receives an IGMP report from a multicast group member, thedevice forwards the message to the Layer 3 device directly connected with it. Thus,when multiple members belonging to a multicast group exit on the Layer 2 device, theLayer 3 device directly connected with it will receive duplicate IGMP reports from thesemembers.With the IGMP report suppression function enabled, within a query interval, the Layer 2device forwards only the first IGMP report of a multicast group to the Layer 3 device andwill not forward the subsequent IGMP reports from the same multicast group to theLayer 3 device. This helps reduce the number of packets being transmitted over thenetwork.Follow these steps to configure IGMP report suppression:To do... Use the command... RemarksEnter system view system-view —Enter IGMP Snoopingview igmp-snooping —
