Preparing the VTAM Environment

Note:
Some of the steps in this document may not be necessary, depending on your existing VTAM network.

Start of instruction setTo prepare your VTAM environment for the Entire Net-Work VTAM line driver:

  1. Follow the Entire Net-Work installation instructions for your operating system.

  2. Define the Entire Net-Work VTAM line driver to VTAM by coding a VTAM APPL macro. You may add the VTAM APPL macro to an existing member in the VTAMLST library, or place it in a new member. Refer to the IBM VTAM Installation and Resource Definition Manual and the VTAM Customization Manual for details on coding APPL definitions.

    The Entire Net-Work VTAM line driver requires that the following parameters be coded on its APPL macro: 

    AUTH=(ACQ,NVPACE)
ENCR=NONE
PARSESS=YES
SONSCIP=YES

    For improved performance, it is recommended that the VTAM APPL macro also contain the following parameters: 

    SRBEXIT=YES  (z/OS only)

  3. If your Entire Net-Work will communicate with partners in other VTAM domains, you may need to code the appropriate multisystem networking definitions to allow cross-domain communications. The term domain refers to a VTAM-started task (or virtual machine or partition) and all resources defined to it.

    Cross-domain communication has the following requirements:

    • Each domain requires a CDRM statement identifying each partner domain with which it will communicate.

    • Each domain requires a PATH statement that identifies each partner domain by its SUBAREA number and the transmission group representing the first segment of the path. Also, if the path includes front-end processors, then the front-end processor network control program requires a PATH statement for each partner domain.

    • Each domain requires a CDRSC statement that identifies the other domain network partner and its CDRM. If communication is always to be initiated by one partner, this CDRSC statement may be optional in the domain of the other partner.

    Refer to the IBM VTAM Installation and Resource Definition Manual and the VTAM Customization Manual for assistance in coding these definitions.

  4. Activate the VTAM definitions with the V NET,ACTIVE,ID= operator command.

  5. Verify the VTAM definitions with the D NET,ID= operator command.