6-16To do... Use the command… RemarksDisplay the information aboutIP and MAC multicast groups inone or all VLANsdisplay igmp-snoopinggroup [ vlan vlan-id ] Available in any viewClear IGMP Snooping statistics reset igmp-snoopingstatistics Available in user viewIGMP 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 6-3, Router A connects to a multicast source (Source) through GigabitEthernet1/0/2, and to Switch A through GigabitEthernet 1/0/1.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 6-3 Network diagram for IGMP Snooping configurationMulticast packetsSourceRouter A Switch AReceiverReceiverHost BHost AHost C1.1.1.1/24GE1/0/4GE1/0/2GE1/0/3IGMP querierGE1/0/1GE1/0/110.1.1.1/24GE1/0/21.1.1.2/24VLAN100Configuration procedure1) Configure the IP address of each interfaceConfigure an IP address and subnet mask for each interface as per Figure 6-3. The detailedconfiguration steps are omitted.2) Configure Router A# Enable IP multicast routing, enable PIM-DM on each interface, and enable IGMP on GigabitEthernet1/0/1. system-view
