The following list of APPL statement parameters briefly describes those parameters that you can use for APPC/MVS LUs. Some parameters are used in the example in SYS1.SAMPLIB member ATBAPPL, which you can copy and modify for your installation's use. Whether you use the example in member ATBAPPL or code APPL statements for APPC/MVS LUs from scratch, refer to:

• z/OS Communications Server: SNA Network Implementation Guide for detailed guidance about APPLs, and
• z/OS Communications Server: SNA Resource Definition Reference for complete descriptions of APPL statement syntax and parameters.

name

Assigns a name to the local LU. In APPC/MVS, this APPL entry name must match the value specified on the ACBNAME parameter. This name must be unique within all interconnected networks, unless the LU will be receiving Allocate requests from partner LUs that are enabled to support network-qualified names. (An APPC/MVS LU is enabled for this support when its LUADD statement in parmlib member APPCPMxx contains the NQN parameter).

ACBNAME=LUname

Specifies the name of the APPC/MVS local LU as it appears in the LUADD parmlib statement of an APPCPMxx parmlib member. This name is specified on the access method control block (ACB) that APPC/MVS uses to identify the LU to VTAM® (through the VTAM OPEN macro). In APPC/MVS, this value must match the APPL entry name (that is, the value in the name or label field of the APPL statement). If left blank, it defaults to the entry name.

APPC=YES

Permits APPC/MVS to use the APPC/VTAM functions. This value is required for all APPC/MVS LUs.

ATNLOSS=value

Specifies whether the ATTN exit for APPC/MVS should be scheduled for session deactivations. You must specify ATNLOSS=ALL for each APPC/MVS LU that is to be enabled for protected conversation support.

AUTOSES=n

Specifies the number of contention-winner sessions that VTAM is to activate automatically before APPC/MVS requests a conversation. VTAM establishes the specified number of sessions when APPC/MVS issues the first Change Number of Sessions (CNOS) to APPC/VTAM for a particular partner LU and logon mode combination.

DMINWNL=n

Specifies the default minimum number of parallel sessions for which VTAM will negotiate for the local LU to be the contention winner.

DMINWNR=n

Specifies the default minimum number of parallel sessions for which VTAM will negotiate for the partner LU to be the contention winner.

DDRAINL=NALLOW

Specifies whether the LU is allowed to drain waiting allocation requests when the session limits have been set to zero. In this case, APPC/MVS does not support draining; therefore, DDRAINL must be coded with a value of NALLOW.

DRESPL=NALLOW

Specifies whether the local LU accepts responsibility for deactivating sessions upon receipt of a CNOS request that names the local LU as the responsible LU. For all APPC/MVS LUs, DRESPL must be coded with a value of NALLOW so that VTAM will assign the responsibility for deactivating sessions to the partner LU that sent the CNOS request.

DSESLIM=n

Specifies the default maximum number of sessions to be allowed between the local LU and a partner LU on a given logon mode.

EAS=n

Sets the approximate number of concurrent sessions available from this LU.

MODETAB=logon mode table name

Specifies the name of the VTAM logon mode table. This table is composed of a series of entries, each of which defines a set of session parameters for a particular logon mode name.

SECACPT=NONE|CONV|ALREADYV|PERSISTV|AVPV

Specifies default FMH5 access security information acceptance.

SRBEXIT=YES

Allows VTAM exits to be in branch-entered SRB mode, supervisor state, and key zero. For APPC/MVS's VTAM exits to execute in the correct environment, this value must be YES.

SYNCLVL=value

Specifies the synchronization level that the APPC/MVS LU supports. SYNCLVL=SYNCPT is required for each APPC/MVS LU that is to be enabled for protected conversation support.

VERIFY=OPTIONAL|REQUIRED

Specifies whether VTAM performs session-level LU-to-LU verification during session activation.

VPACING=n

Specifies the maximum number of messages that another system can send to the APPC/MVS local LU during a conversation before waiting to receive a pacing response.