4-5Configuring Fast-Leave Processing for a UNIWith the fast-leave processing feature enabled, when the ONU receives an IGMP leave message froma host announcing its leaving a multicast group, the ONU immediately deletes that port from theoutgoing port list of the forwarding table. After that, when receiving IGMP group-specific queries for thatmulticast group, the ONU will not forward them to that port.If only one host is attached to a port on the ONU, fast-leave processing helps improve bandwidth andresource usage.Follow these steps to configure fast-leave processing for a UNI:To do... Use the command... RemarksEnter system view system-view —Enter ONU port view interface onuinterface-number —Enable fast-leave processingon a UNIuni uni-numberigmp-snooping fast-leaveRequiredBy default, fast-leaveprocessing is disabled on aUNI.z Before performing this configuration, make sure the ONU works in IGMP Snooping mode. Forrelated configurations, refer to Configuring the Multicast Mode of the ONU.z The fast-leave processing feature is effective for IGMPv2 or IGMPv3 clients only.z If fast leave processing is enabled for a port to which more than one host is attached, when onehost leaves a multicast group, the other hosts attached to the port and listening to the samemulticast group will fail to receive multicast data.Configuring Port Isolation for a UNIThis task adds UNIs to an isolation group to achieve Layer-2 data isolation (that is, UNIs in an isolationgroup cannot forward packets to each other). This improves network security and allows for flexiblenetworking schemes.Follow these steps to configure port isolation for a UNI:To do... Use the command... RemarksEnter system view system-view —Enter ONU port view interface onu interface-number —Configure portisolation for all UNIs onu port-isolate enableConfigureUNI portisolation Configure portisolation for thespecified UNIuni uni-number port-isolateRequiredUse either commandBy default, a UNI port isnot in any isolationgroup.
