1-16To do... Use the command... RemarksEnable the function of droppingunknown multicast dataigmp-snoopingdrop-unknownRequiredDisabled by defaultConfiguring IGMP Report SuppressionWhen a Layer 2 device receives an IGMP report from a multicast group member, the device forwardsthe message to the Layer 3 device directly connected with it. Thus, when multiple members of amulticast group are attached to the Layer 2 device, the Layer 3 device directly connected with it willreceive duplicate IGMP reports from these members.With the IGMP report suppression function enabled, within each query cycle, the Layer 2 deviceforwards only the first IGMP report per multicast group to the Layer 3 device and will not forward thesubsequent IGMP reports from the same multicast group to the Layer 3 device. This helps reduce thenumber of packets being transmitted over the network.Follow these steps to configure IGMP report suppression:To do... Use the command... RemarksEnter system view system-view —Enter IGMP Snooping view igmp-snooping —Enable IGMP reportsuppression report-aggregation OptionalEnabled by defaultConfiguring Maximum Multicast Groups that Can Be Joined on a PortBy configuring the maximum number of multicast groups that can be joined on a port, you can limit thenumber of multicast programs on-demand available to users, thus to regulate traffic on the port.Follow these steps to configure the maximum number of multicast groups allowed on a port or 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 the maximumnumber of multicast groupsallowed on the port(s)igmp-snooping group-limitlimit [ vlan vlan-list ]OptionalBy default, the maximumnumber of multicast groupsallowed on the port(s) is 1000.
