277Step Command Remarks3. Configure the port as asimulated member host.mld-snooping host-joinipv6-group-address [ source-ipipv6-source-address ] vlan vlan-idNot configured by default.NOTE:Unlike a static member port, a port that you configure as a simulated member host ages out like a dynamicmember port.Enabling fast-leave processingThe fast-leave processing feature enables the switch to process MLD done messages quickly. After thefast-leave processing feature is enabled, when the switch receives an MLD done message on a port, itimmediately removes that port from the forwarding entry for the multicast group specified in the message.Then, when the switch receives MLD multicast-address-specific queries for that multicast group, it does notforward them to that port.On a port that has only one host attached, you can enable fast-leave processing to save bandwidth andresources. However, on a port that has multiple hosts attached, you should not enable fast-leaveprocessing if you have enabled dropping unknown IPv6 multicast data globally or for the port.Otherwise, if a host on the port leaves an IPv6 multicast group, the other hosts attached to the port in thesame IPv6 multicast group cannot receive the IPv6 multicast data for the group.Enabling fast-leave processing globallyStep Command Remarks1. Enter system view. system-view N/A2. Enter MLD-snooping view. mld-snooping N/A3. Enable fast-leave processing. fast-leave [ vlan vlan-list ] Disabled by defaultEnabling fast-leave processing on a portStep Command Remarks1. Enter system view. system-view N/A2. Enter Layer 2 Ethernetinterface view, Layer 2aggregate interface view, orport group view.• Enter Layer 2 Ethernet interfaceview or Layer 2 aggregateinterface view:interface interface-typeinterface-number• Enter port group view:port-group manualport-group-nameUse either command.3. Enable fast-leave processing. mld-snooping fast-leave [ vlanvlan-list ] Disabled by default.
