Protocol Requirements

The TIBCO EMS Client for z/OS (CICS) is expected to be installed and operated within a previously existing, fully functional and integrated network.

At a minimum, this includes the following requirements:
  • The TCP/IP protocol stack within the z/OS Communications Server.
  • A DNS server that provides the host name and host address of the z/OS client and the TIBCO EMS Server.
  • Unrestricted network connectivity between the DNS, the TIBCO EMS Client for z/OS (CICS), and the TIBCO EMS Server.

Ensure that you run a properly configured RESOLVER address space.

You must review your TCPCONFIG parameters to ensure that they meet the needs of the installation. If you choose to run TIBCO EMS Client for z/OS (CICS) non-APF authorized, the RESTRICTLOWPORTS parameter must be used. If you want to control TCP buffering, to limit storage usage, or to support large bandwidth devices, the TCPSENDBFRSIZE, TCPRCVBUFRSIZE, and TCPMAXRCVBUFRSIZE parameters might be needed. It is good practice to override the IBM default of 16K by setting TCPRCVBUFRSIZE and TCPSENDBFRSIZE to a minimum value of 48K.