Operation Manual – MulticastH3C S3100 Series Ethernet Switches Chapter 2 IGMP Snooping Configuration2-18Table 2-20 Display and maintain IGMP SnoopingOperation Command RemarksDisplay the current IGMPSnooping configurationdisplay igmp-snoopingconfigurationDisplay IGMP Snoopingmessage statisticsdisplay igmp-snoopingstatisticsDisplay the informationabout IP and MACmulticast groups in one orall VLANsdisplay igmp-snoopinggroup [ vlan vlanid ]You can execute thedisplay commands in anyview.Clear IGMP Snoopingstatisticsreset igmp-snoopingstatisticsYou can execute thereset command in userview.2.4 IGMP Snooping Configuration Examples2.4.1 Configuring IGMP SnoopingI. Network requirementsTo prevent multicast traffic from being flooded at Layer 2, enable IGMP snooping onLayer 2 switches.z As shown in Figure 2-3, Router A connects to a multicast source (Source) throughEthernet1/0/2, and to Switch A through Ethernet1/0/1.z Run PIM-DM and IGMP on Router A. Run IGMP snooping on Switch A. Router Aacts as the IGMP querier.z The multicast source sends multicast data to the multicast group 224.1.1.1. Host Aand Host B are receivers of the multicast group 224.1.1.1.
