Configure IGMPv2 for MCast on Windows

The Windows system is ultimately in control of the IGMP version used to establish group memberships. Unfortunately, there is no socket-level option in our MCast component to set the IGMP version, it will use the system preference.

For versions of Windows that support multiple IGMP versions, the preference can be set in the registry. To do so, add a DWORD value called IGMPVersion at Computer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters with the value data depending on your IGMPVersion.

For example:

• 3 for IGMPv2
• 4 for IGMPv3