Use the CICS Transaction Gateway configuration tool to configure the a new TCP/IP CICS server definition, or edit the SERVER section of the configuration file directly.
Multiple identical server definitions are not permitted in the configuration file of the CICS Transaction Gateway. The combination of fields that identify a TCP/IP server are Host name or IP address and Port.
This ensures that every connection that the CICS server and the network protocol see is represented by a unique server definition in the configuration file. If you have existing Client applications that use different server names to send requests to the same CICS server, you need to write a user exit to redirect requests. This is demonstrated in sample user exits ecix2.c and epix2.c; for more information, see Sample programs.
To configure a TCP/IP server definition by editing the configuration file directly, see SERVER section of the configuration file.