The IGMP version needs to be configured on the interface that connects a multicast device to the user network segment. Ensure that all IGMP devices on the same network segment are configured with the same IGMP version. Otherwise, multicast function cannot run normally.
IGMP versions are classified as IGMPv1, IGMPv2, or IGMPv3. For the differences among the three versions, see the section "Protocol Comparison" in the IGMPv1&v2&v3. You can select a desired IGMP version.
All the devices on the same subnet must be configured with the same IGMP version. By default, IGMPv2 is used.
interface interface-type interface-number
igmp version { 1 | 2 | 3 }