Connecting to an XRF complex that uses a USERVAR

To establish a connection with a session partner that is an XRF complex that uses a USERVAR, the steps you take differ depending on whether the session is initiated from the XRF complex or the IMS system outside of the XRF complex.

• If the non-XRF half session initiates the session with IMS, the non-XRF half session should:
  1. Identify the APPLID of the currently active IMS system by issuing the following macro:

     INQUIRE OPTCD=USERVAR,AREA=area,AREALN=8

     If the VTAM® network is Release 3.2 or later and USERVAR Management Enhancement is installed, you do not need to issue the INQUIRE macro.

     With this request, the AREA parameter specifies the address of the area with the USERVAR name for the active XRF system. The USERVAR is then replaced with the APPLID of the currently active IMS system.

  2. Issue a session-initiation request by specifying the APPLID of the active IMS system.

     If the VTAM network is Release 3.2 or later and USERVAR Management Enhancement is installed, issue a session-initiation request by specifying the USERVAR of the XRF system.

• If the IMS system in the XRF complex initiates the session, the IMS system:
  1. Issues the session-initiation request, adding the USERVAR assigned to the BIND in the user data field.
  2. Validates the session-initiation request by referencing the USERVAR in the user data field located at the end of the request. Initiation is not apparent to the user.