Operation Manual – MulticastH3C S5100-SI/EI Series Ethernet Switches Chapter 2 IGMP Snooping Configuration2-12Operation Command RemarksConfigure the interval ofsending general queriesigmp-snoopingquery-interval secondsOptionalBy default, the interval ofsending general queries is60 seconds.Configure the source IPaddress of generalqueriesigmp-snoopinggeneral-query source-ip{ current-interface |ip-address }OptionalBy default, the source IPaddress of generalqueries is 0.0.0.0.2.2.8 Suppressing Flooding of Unknown Multicast Traffic in a VLANWith IGMP Snooping enabled in a VLAN, multicast traffic for unknown multicast groupsis flooded within the VLAN by default. This wastes network bandwidth and affectsmulticast forwarding efficiency.With the unknown multicast flooding suppression function enabled, when receiving amulticast packet for an unknown multicast group, an IGMP Snooping switch creates anonflooding entry and relays the packet to router ports only, instead of flooding thepacket within the VLAN. If the switch has no router ports, it drops the multicast packet.Table 2-12 Suppress flooding of unknown multicast traffic in the VLANOperation Command RemarksEnter system view system-view —Enable unknown multicastflooding suppressionigmp-snoopingnonflooding-enableRequiredBy default, unknownmulticast floodingsuppressionNote:If the function of dropping unknown multicast packets is enabled, you cannot enableunknown multicast flooding suppression.2.2.9 Configuring Static Member Port for a Multicast GroupIf the host connected to a port is interested in the multicast data for a specific group, youcan configure that port as a static member port for that multicast group.
