2-5Enabling IGMP SnoopingTable 2-3 Enable IGMP SnoopingOperation Command RemarksEnter system view system-view —Enable IGMP Snoopingglobally igmp-snooping enableRequiredBy default, IGMP Snooping isdisabled globally.Enter VLAN view vlan vlan-id —Enable IGMP Snooping on theVLAN igmp-snooping enableRequiredBy default, IGMP Snooping isdisabled on all the VLANs.z Before enabling IGMP Snooping in a VLAN, be sure to enable IGMP Snooping globally in systemview; otherwise the IGMP Snooping settings will not take effect.z If IGMP Snooping and VLAN VPN are enabled on a VLAN at the same time, IGMP queries arelikely to fail to pass the VLAN. You can solve this problem by configuring VLAN tags for queries.For details, see 0 Configuring a VLAN Tag for Query Messages.Configuring the Version of IGMP SnoopingBy configuring an IGMP snooping version, you actually configure the version of IGMP messages thatIGMP snooping can process.z IGMP snooping version 2 can process IGMPv1 and IGMPv2 messages, but not IGMPv3 messages,which will be flooded in the VLAN.z IGMP snooping version 3 can process IGMPv1, IGMPv2 and IGMPv3 messages.Table 2-4 Configure the version of IGMP SnoopingOperation Command RemarksEnter system view system-view —Enter VLAN view vlan vlan-id —Configure the version of IGMPSnoopingigmp-snooping versionversion-numberOptionalThe default IGMP Snoopingversion is version 2.
