NQNMODE start option

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   .-NQNMODE--=--NAME-------.   
>>-+------------------------+----------------------------------><
   '-NQNMODE--=--+-NAME---+-'   
                 '-NQNAME-'     

Specifies whether VTAM® defines cross-network resources by both their non-network-qualified names and their network-qualified names or only by their network-qualified names.

If NQNMODE is specified on the CDRSC definition statement, it overrides the value specified on the NQNMODE start option. Dynamic CDRSCs and independent LUs which are defined using LOCADDR=0 are defined with the NQNMODE start option.

You can change the value of NQNMODE with the MODIFY VTAMOPTS command while VTAM is running.
NQNMODE=NAME
Specifies that the cross-network resource is defined by both its network-qualified name and its non-network-qualified name. The same-network CDRSC is always considered to be defined using NQNMODE=NAME because it is always identified by its non-network-qualified name. This is the mode in which pre-V4R1 releases of VTAM operate.

If a CDRSC is defined using NQNMODE=NAME (either by definition or start option), then no other resource can be defined to that host by the same non-network-qualified name.

NQNMODE=NQNAME
Specifies that the cross-network resource is defined by its network-qualified name and is not defined to this host by its non-network-qualified name.

If you have duplicate names in your SNA interconnected networks and prefer not to use other forms of alias name translation, you can specify (either by definition or start option) NQNMODE=NQNAME.