1-11Configuring fast leave processing on a port or a group of portsFollow these steps to configure fast leave processing on a port or a group of ports:To do... Use the command... RemarksEnter system view system-view —interface interface-typeinterface-numberEnter Ethernet port/Layer 2aggregate port view or portgroup view port-group manual port-group-nameRequiredUse either approachEnable fast leave processing mld-snooping fast-leave [ vlanvlan-list ]RequiredDisabled by defaultIf fast leave processing is enabled on a port to which more than one host is connected, when one hostleaves an IPv6 multicast group, the other hosts connected to port and interested in the same IPv6multicast group will fail to receive IPv6 multicast data addressed to that group.Configuring MLD Snooping QuerierConfiguration PrerequisitesBefore configuring MLD Snooping querier, complete the following task:z Enable MLD Snooping in the VLAN.Before configuring MLD Snooping querier, prepare the following data:z MLD general query interval,z MLD last-member query interval,z Maximum response time for MLD general queries,z Source IPv6 address of MLD general queries, andz Source IPv6 address of MLD multicast-address-specific queries.Enabling MLD Snooping QuerierIn an IPv6 multicast network running MLD, a multicast router or Layer 3 multicast switch is responsiblefor sending periodic MLD general queries, so that all Layer 3 multicast devices can establish andmaintain multicast forwarding entries, thus to forward multicast traffic correctly at the network layer. Thisrouter or Layer 3 switch is called MLD querier.However, a Layer 2 multicast switch does not support MLD, and therefore cannot send MLD generalqueries by default. By enabling MLD Snooping querier on a Layer 2 switch in a VLAN where multicasttraffic needs to be Layer-2 switched only and no Layer 3 multicast devices are present, the Layer 2switch will act as the MLD querier to send periodic MLD queries, thus allowing multicast forwardingentries to be established and maintained at the data link layer.Follow these steps to enable the MLD Snooping querier:
