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

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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.

To assign TCP/IP ports to multiple instances of the CAICCI server

  1. Use a variable for the port number in the CAICCI TCP/IP server started task JCL member, for example: 
    //CCITCP EXEC PGM=CAS9ATGS,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.