After a static IGMP group is configured on the interface that connects a multicast device to the user network segment, the multicast device considers that the interface has multicast group members and keeps on forwarding matched multicast packets to the interface.
interface interface-type interface-number
igmp static-group group-address [ inc-step-mask { group-mask | group-mask-length } number group-number ] [ source source-address ]
By default, the interface does not statically join any multicast group.
After the interface joins the multicast groups, the FW considers that the members of the multicast groups exist on the network segment where the interface resides.
When the interface that connects a multicast device to the user network segment joins a multicast group in both dynamic and static modes, the interface preferentially joins the multicast group in static mode if a conflict occurs.