The SECLVL operand specifies whether enhanced security verification is used during session-level LU-LU verification.

• SECLVL=ADAPT specifies that either the enhanced or the basic protocol for identity verification will be performed on sessions that use session-level LU-LU verification. VTAM® attempts to use the enhanced protocol but accepts the use of the basic protocol if the partner LU does not support the enhanced protocol.
• SECLVL=LEVEL1 specifies that the basic protocol is used for sessions that use session-level LU-LU verification.
• SECLVL=LEVEL2 specifies that VTAM uses only the enhanced protocol for identity verification. If the partner LU does not support the enhanced protocol, VTAM rejects the session and issues the sense code 080F0002 (session-level LU-LU verification protocol mismatch).

The following example illustrates the use of the SECLVL operand:

         VBUILD TYPE=APPL
            . . .
APPCAP05 APPL AUTH=(ACQ,PASS),APPC=YES,SYNCLVL=SYNCPT,ATNLOSS=ALL,     *
               OPERCNOS=ALLOW,VERIFY=REQUIRED,SECLVL=ADAPT
APPCAP06 APPL AUTH=(ACQ,PASS),APPC=YES,SYNCLVL=SYNCPT,ATNLOSS=ALL,     *
               OPERCNOS=ALLOW,VERIFY=REQUIRED,SECLVL=LEVEL1
 
APPCAP07 APPL AUTH=(ACQ,PASS),APPC=YES,SYNCLVL=SYNCPT,ATNLOSS=ALL,     *
               OPERCNOS=ALLOW,VERIFY=REQUIRED,SECLVL=LEVEL2
            . . .