1-23z If the multicast group replacement feature is enabled, the newly joined multicast groupautomatically replaces an existing multicast group with the lowest address.z If the multicast group replacement feature is not enabled, new IGMP reports will be automaticallydiscarded.Configuring multicast group replacement globallyFollow these steps to configure multicast group replacement globally:To do... Use the command... RemarksEnter system view system-view —Enter IGMP snooping view igmp-snooping —Enable multicast groupreplacementoverflow-replace [ vlanvlan-list ]RequiredDisabled by defaultConfiguring multicast group replacement on a port or a group of portsFollow these steps to configure multicast group replacement on a port or a group of ports:To do... Use the command... RemarksEnter system view system-view —interface interface-typeinterface-numberEnter Ethernet port/ONUport/Layer 2 aggregateinterface view or port groupview port-group manualport-group-nameRequiredUse either approachEnable multicast groupreplacementigmp-snoopingoverflow-replace [ vlanvlan-list ]RequiredDisabled by defaultBe sure to configure the maximum number of multicast groups allowed on a port (refer to ConfiguringMaximum Multicast Groups that Can Be Joined on a Port) before enabling multicast group replacement.Otherwise, the multicast group replacement functionality will not take effect.Configuring 802.1p Precedence for IGMP MessagesYou can change 802.1p precedence of IGMP messages so that they can be assigned higher forwardingpriority when congestion occurs on their outgoing ports.Configuring 802.1p precedence for IGMP messages globallyFollow these steps to configure 802.1p precedence for IGMP messages globally:To do... Use the command... RemarksEnter system view system-view —
