1-11Configuring the source address to be carried in IGMP queriesFollow these steps to configure the source address to be carried in IGMP queries:To do... Use the command... RemarksEnter system view system-view —Enter VLAN view vlan vlan-id —Configure the source IPaddress of IGMP generalqueriesigmp-snoopinggeneral-query source-ip{ current-interface |ip-address }Optional0.0.0.0 by defaultConfigure the source IPaddress of IGMP group-specificqueriesigmp-snoopingspecial-query source-ip{ current-interface |ip-address }0.0.0.0 by defaultSuppressing Flooding of Unknown Multicast Traffic in a VLANWith IGMP Snooping enabled in a VLAN, multicast traffic for unknown multicast groups is flooded withinthe VLAN by default. This wastes network bandwidth and affects multicast forwarding efficiency.With the unknown multicast flooding suppression function enabled, when receiving a multicast packetfor an unknown multicast group, an IGMP Snooping switch creates a nonflooding entry and relays thepacket to router ports only, instead of flooding the packet within the VLAN. If the switch has no routerports, it drops the multicast packet.Follow these steps to suppress flooding of unknown multicast traffic in the VLAN:To do... Use the command... RemarksEnter system view system-view —Enable unknown multicastflooding suppressionigmp-snoopingnonflooding-enableRequiredBy default, unknown multicastflooding suppressionz If the function of dropping unknown multicast packets or the XRN fabric function is enabled, youcannot enable unknown multicast flooding suppression.z Unknown multicast flooding suppression and multicast source port suppression cannot take effectat the same time. If both are enabled, only multicast source port suppression takes effect. In thiscase, multicast data received on the blocked port will be dropped.Configuring Static Member Port for a Multicast GroupIf the host connected to a port is interested in the multicast data for a specific group, you can configurethat port as a static member port for that multicast group.
