Common Communications Interface › TCP/IP Configurations › Assign TCP/IP Ports to Multiple Instances of a CAICCI Server

Assign TCP/IP Ports to Multiple Instances of a CAICCI Server

If you must have multiple instances of the CAICCI TCP/IP server in a client-server configuration on a single z/OS system, each requires a unique port number. You can specify the port number in the server started task JCL member using a variable that you override at startup time.

Follow these steps:

1. Use a variable for the port number in the CAICCI TCP/IP server started task JCL member, for example:

   //CCITCP EXEC PGM=CAS9PDGM,PARM='PORT=&PORT',…
   

   The &PORT variable assumes a port number when the server starts.

2. Start the server instances, specifying the port numbers, for example:

   START CCITCP.CCI1,…PORT=4500
   START CCITCP.CCI2,…PORT=4501
   START CCITCP.CCI3,…PORT=4502
   

   The server instances start, using the specified port numbers.