2-13z When an Ethernet port is configured as a simulated member host, the switch sends an IGMP reportthrough this port. Meanwhile, the switch sends the same IGMP report to itself and establishes acorresponding IGMP entry based on this report.z When receiving an IGMP general query, the simulated host responds with an IGMP report.Meanwhile, the switch sends the same IGMP report to itself to ensure that the IGMP entry does notage out.z When the simulated joining function is disabled on an Ethernet port, the simulated host sends anIGMP leave message.Therefore, to ensure that IGMP entries will not age out, the port must receive IGMP general queriesperiodically.Table 2-16 Configure a port as a simulated group memberOperation Command RemarksEnter system view system-view —Enter Ethernet port view interface interface-typeinterface-number —Configure the current port as asimulated multicast groupmemberigmp host-join group-address[source-ip source-address ] vlanvlan-idRequiredSimulated joining isdisabled by default.z Before configuring a simulated host, enable IGMP Snooping in VLAN view first.z The port to be configured must belong to the specified VLAN; otherwise the configuration does nottake effect.z You can use the source-ip source-address command to specify a multicast source address thatthe port will join as a simulated host. This configuration takes effect when IGMPv3 Snooping isenabled in the VLAN.Configuring a VLAN Tag for Query MessagesBy configuring the VLAN in which IGMP general and group-specific queries forwarded and sent byIGMP Snooping switches are transmitted, you can enable multicast packet forwarding between differentVLANs In a Layer-2 multicast network environment.Table 2-17 Configure VLAN Tag for query messageOperation Command RemarksEnter system view system-view —Enable IGMP Snooping igmp-snooping enableRequiredBy default, IGMP Snooping isdisabled.Configure a VLAN tag for querymessagesigmp-snoopingvlan-mapping vlan vlan-id Required
