Defining APPC/MVS Logon Mode Entry in VTAMLIB

A logon mode is a set of parameters and protocols that determines the communication characteristics of a VTAM® session. Logon modes are entries in a logon mode table contained in the system VTAMLIB library.

APPC/MVS requires a logon mode entry in a logon mode table. The logon mode table containing the APPC/MVS logon mode entry must be assembled and linked into the VTAMLIB library defined by the VTAM start procedure. System SAMPLIB member ATBLJOB (for example, SYS1.SAMPLIB(ATBLJOB)) provides sample JCL for assembling and linking a logon mode table.

Figure 1 is an example of a logon mode table containing several logon mode entries. This example can be found in system SAMPLIB member GDELOGMD (for example, SYS1.SAMPLIB(GDELOGMD)) or see GDELOGMD.

Figure 1. Logon Mode Table

LOGMODES MODETAB   ◄─── VTAM APPL LOGMODE table name
         EJECT
**********************************************************************
         TITLE 'SNASVCMG'                                            *
**********************************************************************
*        LOGMODE TABLE ENTRY FOR RESOURCES CAPABLE OF ACTING         *
*               AS LU 6.2 DEVICES                                    *
*               REQUIRED FOR LU MANAGEMENT                           *
**********************************************************************
SNASVCMG MODEENT LOGMODE=SNASVCMG,FMPROF=X'13',TSPROF=X'07',      *
               PRIPROT=X'B0',SECPROT=X'B0',COMPROT=X'D0B1',       *
               RUSIZES=X'8585',ENCR=B'0000',                         *
               PSERVIC=X'060200000000000000000300'
**********************************************************************
         TITLE 'QPCSUPP '                                            *
**********************************************************************
*        LOGMODE TABLE ENTRY FOR RESOURCES CAPABLE OF ACTING         *
*               AS LU 6.2 DEVICES                                    *
*               REQUIRED FOR LU MANAGEMENT                           *
**********************************************************************
QPCSUPP  MODEENT LOGMODE=QPCSUPP,FMPROF=X'13',TSPROF=X'07',          *
               PRIPROT=X'B0',SECPROT=X'B0',COMPROT=X'D0B1',          *
               RUSIZES=X'8585',ENCR=B'0000',                         *
               PSERVIC=X'060200000000000000000300'
**********************************************************************
         TITLE 'APPCPCLM'
**********************************************************************
*        LOGMODE TABLE ENTRY FOR RESOURCES CAPABLE OF ACTING         *
*               AS LU 6.2 DEVICES                                    *
*               FOR PC TARGET                                        *
*   IN THIS EXAMPLE THE DEFAULT RU SIZE FOR OS/2 (1024) IS USED      *
**********************************************************************
APPCPCLM MODEENT LOGMODE=APPCPCLM,                                   *
               RUSIZES=X'8787',                                      *
               SRCVPAC=X'00',                                        *
               SSNDPAC=X'01'
**********************************************************************
         TITLE 'APPCHOST'
**********************************************************************
*        LOGMODE TABLE ENTRY FOR RESOURCES CAPABLE OF ACTING         *
*               AS LU 6.2 DEVICES                                    *
*               FOR HOST TARGET                                      *
*   IN THIS EXAMPLE RU SIZE OF 4096 IS USED                          *
**********************************************************************
APPCHOST MODEENT LOGMODE=APPCHOST,                                   *
               RUSIZES=X'8989',                                      *
               SRCVPAC=X'00',                                        *
               SSNDPAC=X'01'
         MODEEND
         END

The name of the logon mode table defined in the VTAM APPL definition must match the name defined in VTAMLIB. In Figure 1, for example, the name of the logon mode table defined to VTAMLIB is LOGMODES.

For more information about defining the APPC/MVS logon mode, see z/OS MVS Planning: APPC/MVS Management.