Step 3: Define the SNALINK LU6.2 application to VTAM

SNALINK LU6.2 opens two SNA LU type 6.2 sessions with each destination node; one for sending and one for receiving. If a destination node supports parallel SNA LU type 6.2 sessions (PARSESS=YES), the two sessions use the same remote logical unit; otherwise, two remote logical units are used. In either case, SNALINK LU6.2 uses a single local logical unit that must support parallel sessions.

The SNALINK LU6.2 address space must be defined to VTAM® as an SNA LU type 6.2 application program. The following APPL statement defines a SNALINK LU6.2 application to VTAM.

Figure 1. APPL statement for SNALINK LU6.2

LU62APPL  APPL ACBNAME=LU62APPL,                                       *
               PRTCT=QWERTY,                                           *
               AUTH=(ACQ,VPACE),                                       *
               SRBEXIT=NO,                                             *
               EAS=12,                                                 *
               PARSESS=YES,                                            *
               SONSCIP=YES,                                            *
               APPC=YES,                                               *
               DLOGMOD=LU62MODE,                                       *
               VPACING=0

Requirement: SRBEXIT must be NO.

See z/OS Communications Server: SNA Resource Definition Reference for further information about defining VTAM applications.

The LOGMODE table entry specified by the APPL DLOGMOD parameter should have the following form:

LU62MODE MODEENT LOGMODE=LU62MODE,FMPROF=X'13',TSPROF=X'07',           *
               PRIPROT=X'B0',SECPROT=X'B0',COMPROT=X'D0B1',            *
               RUSIZES=X'8585',ENCR=B'0000',                           *
               PSERVIC=X'060200000000000000000300'

See z/OS Communications Server: SNA Customization for more information about defining log mode tables and z/OS Communications Server: SNA Programming for information on PSERVIC values.