6-8z The fast leave processing function works for a port only if the host attached to the port runs IGMPv2or IGMPv3.z The configuration performed in system view takes effect on all ports of the switch if no VLAN isspecified; if one or more VLANs are specified, the configuration takes effect on all ports in thespecified VLAN(s).z The configuration performed in Ethernet port view takes effect on the port no matter which VLAN itbelongs to if no VLAN is specified; if one or more VLANs are specified, the configuration takeseffect on the port only if the port belongs to the specified VLAN(s).Configuring a Multicast Group FilterOn an IGMP Snooping-enabled switch, the configuration of a multicast group allows the serviceprovider to define restrictions on multicast programs available to different users.In an actual application, when a user requests a multicast program, the user’s host initiates an IGMPreport. Upon receiving this report message, the switch checks the report against the ACL ruleconfigured on the receiving port. If the receiving port can join this multicast group, the switch adds thisport to the IGMP Snooping multicast group list; otherwise the switch drops this report message. Anymulticast data that has failed the ACL check will not be sent to this port. In this way, the service providercan control the VOD programs provided for multicast users.Make sure that an ACL rule has been configured before configuring this feature.Configuring a multicast group filter in system viewFollow these steps to configure a multicast group filter in system view:To do... Use the command... RemarksEnter system view system-view —Configure a multicastgroup filterigmp-snooping group-policyacl-number [ vlan vlan-list ]RequiredNo group filter is configured by default,namely hosts can join any multicastgroup.Configuring a multicast group filter in Ethernet port viewFollow these steps to configure a multicast group filter in Ethernet port view:To do... Use the command... RemarksEnter system view system-view —Enter Ethernet port view interface interface-typeinterface-number —Configure a multicast groupfilterigmp-snooping group-policyacl-number [ vlan vlan-list ]OptionalNo group filter is configured bydefault, namely hosts can joinany multicast group.
