Using MVS system symbols to define start option lists

By using MVS™ system symbols in VTAMLST, you can code a single start option list that can be used to start VTAM® on multiple systems. You also can use MVS system symbols to reduce system definition in single system environments.

Guideline: To use MVS system symbols in VTAM, you must have at least MVS V5R2.

For instance, to define a single start option list for use on any of your VTAM interchange nodes, you could use the following start option list that uses MVS system symbols.

**********************************************************
*
* Description: Start definition deck for host 1A
*
**********************************************************
*
SSCPID=0&NUMBER1.,        Host ID                                      X
SSCPNAME=SSCP&SYSCLONE.,  Host name                                    X
CONFIG=&SYSCLONE.,        Start config                                 X
&NET.&ID=&NET.&USERSYM1;, In NETA                                      X
NODETYPE=NN,              ICN node                                     X
HOSTSA=0&NUMBER1.,         Subarea host number                         X
MAXSUBA=&NUMBER2.&NUMBER5.&NUMBER5., Max Subarea Number                X
HOSTPU=PUT5&SYSCLONE.,    HOST PU                                      X
CPCP=YES,                 CP-CP session                                X
DYNADJCP=YES,             Dynamic adjacent CP (default)                X
ROUTERES=1,               Route address                                X
DYNLU=YES,                Dynamic LU                                   X
VERIFYCP=NONE,            Verify CP (default)                          X
CDSERVR=NO,               DIRECTORY SERVER                             X
TRACE,                                                                 X
  TYPE=VTAM,                                                           X
  OPT=ALL,                                                             X
  SIZE=200,               Start VIT                                    X
CRPLBUF=(&NUMBER2.&NUMBER0.&NUMBER0.), CRPL                            X
LFBUF=(100,,10,,10,33),   Fixed large buffer pool                      X
LPBUF=(6&NUMBER4.,,&NUMBER4.,,&NUMBER4.,22),                           X
SFBUF=(60),               Fixed small buffer pool                      X
SPBUF=(32)                Pagable small buffer pool

You assign values to MVS system symbols by including definitions for them in the IEASYMM1 parmlib member, as in the sample that follows:

************
************  IEASYMM1 MEMBER
************
SYSDEF    SYSCLONE(1A)
          SYMDEF(&USERSYM1='A')
          SYMDEF(&USERSYM2='1')
          SYMDEF(&USERSYM3='GUY')
          SYMDEF(&USERSYM4='A1A*')
          SYMDEF(&USERSYM5='APPL1A')
          SYMDEF(&USERSYM6='P')
          SYMDEF(&USERSYM7='SSCPNAME')
          SYMDEF(&NET='NET')
          SYMDEF(&NAME='NAME')
          SYMDEF(&ID='ID')
          SYMDEF(&SSCP='SSCP')
          SYMDEF(&NUMBER0='0')
          SYMDEF(&NUMBER1='1')
          SYMDEF(&NUMBER01='01')
          SYMDEF(&NUMBER2='2')
          SYMDEF(&NUMBER4='4')
          SYMDEF(&NUMBER5='5')
          SYMDEF(&NUMBER10='10')
          SYMDEF(&N60000='60000')
          SYMDEF(&LIST='LIST')
          SYMDEF(&LIST1A='1A')
          SYMDEF(&APPL1A='APPL1A')
          SYMDEF(&PATH1A='PATH1A')
          SYMDEF(&CDRSC1A='CDRSC1A')
          SYMDEF(&CDRM1A='CDRM1A')
          SYMDEF(&HOST1A='1A')
          SYMDEF(&HOST2A='2A')
          SYMDEF(&NETA='2A')
          SYMDEF(&SSCPNAME='SSCP1A')
          SYMDEF(&CONFIG='GM')
          SYMDEF(&APPLNAME='POAPPL1A')
          SYMDEF(&APPL='APPL')
          SYMDEF(&USERXX='XX')
          SYMDEF(&USERYY='YY')
          SYMDEF(&UNET='A')
          SYMDEF(&QUESTION='?')
          SYMDEF(&ASTER='*')
          SYMDEF(&AMPER='&')
          SYMDEF(&LINE='LINE')
          SYMDEF(&TYPE='TYPE')
          SYMDEF(&CTC='CTC')
          SYMDEF(&PU='PU')
          SYMDEF(&LU='LU')
************
************  LOADM1 MEMBER

When these MVS system symbols are resolved, the start list above becomes the following list:

**********************************************************
*
* Description: Start definition deck for host 1A
*
**********************************************************
*
SSCPID=01,                Host ID                                      X
SSCPNAME=SSCP1A,          Host name                                    X
CONFIG=1A,                Start config                                 X
NETID=NETA,               In NETA                                      X
NODETYPE=NN,              ICN node                                     X
HOSTSA=01,                Subarea host number                          X
MAXSUBA=255,              Max Subarea Number                           X
HOSTPU=PUT51A,            HOST PU                                      X
CPCP=YES,                 CP-CP session                                X
DYNADJCP=YES,             Dynamic adjacent CP (default)                X
ROUTERES=1,               Route address                                X
DYNLU=YES,                Dynamic LU                                   X
VERIFYCP=NONE,            Verify CP (default)                          X
CDSERVR=NO,               DIRECTORY SERVER                             X
TRACE,                                                                 X
  TYPE=VTAM,                                                           X
  OPT=ALL,                                                             X
  SIZE=200,               Start VIT                                    X
CRPLBUF=(200),            CRPL                                         X
LFBUF=(100,,10,,10,33),   Fixed large buffer pool                      X
LPBUF=(64,,4,,4,22),      Pageable large buffer pool                   X
SFBUF=(60),               Fixed small buffer pool                      X
SPBUF=(32)                Pagable small buffer pool