2-16You can execute the reset command in user view to clear the statistics information about IGMPSnooping.Table 2-20 Display and maintain IGMP SnoopingOperation Command RemarksDisplay the current IGMPSnooping configurationdisplay igmp-snoopingconfigurationDisplay IGMP Snoopingmessage statisticsdisplay igmp-snoopingstatisticsDisplay the information aboutIP and MAC multicast groups inone or all VLANsdisplay igmp-snoopinggroup [ vlan vlanid ]You can execute the displaycommands in any view.Clear IGMP Snooping statistics reset igmp-snoopingstatisticsYou can execute the resetcommand in user view.IGMP Snooping Configuration ExamplesConfiguring IGMP SnoopingNetwork requirementsTo prevent multicast traffic from being flooded at Layer 2, enable IGMP snooping on Layer 2 switches.z As shown in Figure 2-3, Router A connects to a multicast source (Source) through Ethernet1/0/2,and to Switch A through Ethernet1/0/1.z Run PIM-DM and IGMP on Router A. Run IGMP snooping on Switch A. Router A acts as the IGMPquerier.z The multicast source sends multicast data to the multicast group 224.1.1.1. Host A and Host B arereceivers of the multicast group 224.1.1.1.Network diagramFigure 2-3 Network diagram for IGMP Snooping configurationMulticast packetsSourceRouter A Switch AReceiverReceiverHost BHost AHost C1.1.1.1/24Eth1/0/4Eth1/0/2Eth1/0/3IGMP querierEth1/0/1Eth1/0/110.1.1.1/24Eth1/0/21.1.1.2/24VLAN100
