Automatic generation of lines and physical units

To enable VTAM® to automatically generate lines and physical units on an external communication adapter major node, code the AUTOGEN operand on the GROUP definition statement of the external communication adapter major nodes where DIAL=YES has been specified. Thus, the lines and PUs do not need to be explicitly coded. For information about the naming conventions used for the lines and physical units, see the z/OS Communications Server: SNA Resource Definition Reference.

The following definitions were extracted from the sample XCA major node for host A500 (token-ring LAN). The device address is specified on the CUADDR operand of the PORT definition statement. Here, CUADDR=BE0.

The AUTOGEN operand is specified as (3,L,P), where:

3 is a decimal value specifying the number of lines and PUs to be generated automatically by VTAM.
L is a user-supplied character used in generated line names.
P is a user-supplied character used in generated physical unit names.

DIAL=YES on the GROUP definition statement is required for automatic generation of lines and physical units.

**********************************************************************
* X50BBE0 - VTAM EXTERNAL COMMUNICATION ADAPTER MAJNOD - MDH A500    *
**********************************************************************
*   3172 XCA MAJOR NODE FOR HOST A500N
**********************************************************************
XTBBE0   VBUILD TYPE=XCA             ** EXTERNAL COMMUNICATION ADAPT**
PORTBE   PORT  ADAPNO=0,             ** 3172 RELATIVE ADAPTER NUMBER** X
               CUADDR=BE0,           ** CHANNEL UNIT ADDRESS * X
               MEDIUM=RING,          ** LAN TYPE                    ** X
               SAPADDR=8,            ** SERVICE ACCESS POINT ADDRESS** X
               TIMER=90              ** CHANNEL ACTIVATE RESP TIME  **
GP1BE1   GROUP ANSWER=ON,            ** PU DIAL INTO VTAM CAPABILITY** X
               AUTOGEN=(3,L,P),      ** AUTO GENERATE LINES A* X
               CALL=INOUT,           ** IN/OUT CALLING CAPABILITY   ** X
               DIAL=YES,             ** SWITCHED CONNECTION  * X
               ISTATUS=INACTIVE      ** INITIAL ACTIVATION STATUS   **
***********************************************************************

The three lines generated by VTAM will have line names L0BE0000, L0BE0001, and L0BE0002, where:

L is the user-supplied character specified in the AUTOGEN operand.
0BE0 is the device address, as specified on the CUADDR operand.
000, 001, and 002 are sequential hexadecimal numbers assigned by VTAM.

The two physical units generated by VTAM will have PU names P0BE0000, P0BE0001, and P0BE0002, where:

P is the user-supplied character specified in the AUTOGEN operand.
0BE0 is the device address, as specified on the CUADDR operand.
000, 001, and 002 are sequential hexadecimal numbers assigned by VTAM.

For more information about the AUTOGEN operand, see the z/OS Communications Server: SNA Resource Definition Reference.