1-14Configuring an MLD Snooping PolicyConfiguration PrerequisitesBefore configuring an MLD Snooping policy, complete the following tasks:z Enable MLD Snooping in the VLAN or enable MLD on the desired VLAN interfaceBefore configuring an MLD Snooping policy, prepare the following data:z IPv6 ACL rule for IPv6 multicast group filteringz The maximum number of IPv6 multicast groups that can pass the portsConfiguring an IPv6 Multicast Group FilterOn a MLD Snooping–enabled switch, the configuration of an IPv6 multicast group filter allows theservice provider to define limits of multicast programs available to different users.In an actual application, when a user requests a multicast program, the user’s host initiates an MLDreport. Upon receiving this report message, the switch checks the report against the configured ACLrule. If the port on which the report was received can join this IPv6 multicast group, the switch adds anentry for this port in the MLD Snooping forwarding table; otherwise the switch drops this report message.Any IPv6 multicast data that fails the ACL check will not be sent to this port. In this way, the serviceprovider can control the VOD programs provided for multicast users.Configuring an IPv6 multicast group filter globallyFollow these steps to configure an IPv6 multicast group globally:To do... Use the command... RemarksEnter system view system-view —Enter MLD Snooping view mld-snooping —Configure an IPv6 multicastgroup filtergroup-policy acl6-number[ vlan vlan-list ]RequiredNo IPv6 filter configured by default.Configuring an IPv6 multicast group filter on a port or a group of portsFollow these steps to configure an IPv6 multicast group filer 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 manualport-group-nameRequiredUse either approachConfigure an IPv6 multicastgroup filtermld-snooping group-policyacl6-number [ vlan vlan-list ]RequiredNo IPv6 filter configured bydefault.
