1-18To 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 defaultOn an IGMP snooping proxy, IGMP membership reports are suppressed if the entries for thecorresponding groups exist in the forwarding table, no matter the suppression function is enabled ornot.Configuring 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 interface/Layer2 aggregate interface view orport group view port-group manualport-group-nameRequiredUse either approach
