If you configure a large-scale system that uses OpenTP1, a shortage of ports managed by TCP/IP might occur. In such a case, you can resolve the shortage by performing temporary close processing.

However in a high-traffic environment, a shortage of ports might not be resolved by performing temporary close processing. In such a case, you can tune the ports used on the corresponding platform by extending ephemeral ports in Windows settings.

Use a Windows registry command to set the following parameters:

• MaxUserPort
• TcpTimedWaitDelay
• ReservedPorts

For details about setting these parameters, see the Windows documentation.

For details about temporary close processing, see the description of how to limit the number of ports in the manual OpenTP1 Version 7 Description.