HP-UX SNAplus2 CPI-C Programmer's Guide (June 2003)

Writing CPI-C Applications
Specifying the Local LU
Chapter 292
Default Local LU
Local LUs can be configured to be a part of the default pool of APPC LUs.
If no other local LU alias is specified, any suitable LU from this pool is
used.
Control Point LU
SNAplus2 normally has one control point (CP) LU defined on each node.
If no other local LU alias is defined then the CP LU is used.