SNAX/XF and SNAX/APN Configuration and Management Manual

SNAX Quickstart and Overview
SNAX/XF and SNAX/APN Configuration and Management Manual—425836-006
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LU-LU Session Establishment
LU-LU Session Establishment
LU-LU session establishment is handled differently by different SNAX API protocols:

For CRT, ITI, and PRT protocols, handled by the SNAX line handler.

For SNALU, handled by the application or by SNAX/HLS or SNAX/APC (when
used).

For SNALU/XS, handled by SNAX/APC.
An LU on the NonStop system can be the primary LU (sends the BIND) or secondary
LU (awaits a BIND). Table 1-4 shows the various ways of establishing sessions:
For SNAX/XF passthrough, the session is established between the SNA host and SNA
peripheral node, according to normal SNA rules.
Detailed information about session establishment is provided in Appendix A, Session
Establishment. Details of the SNAX default BIND and how to configure for custom
BINDs is provided in Appendix B, SNAX/XF and SNAX/APN BINDs.
Table 1-4. LU-LU Session Establishment
Type of Line HP LU LU Acquire LU Accept
SNAX/XF
primary line
Primary LU HP LU sends a BIND When remote LU sends a
logon or INIT-SELF, the
SNAX LU sends a BIND
SNAX/XF
secondary line
Secondary LU HP LU sends an
INIT-SELF and waits to
receive a BIND
Remote LU sends a BIND
SNAX/APN
APPC
Primary LU HP LU sends a BIND (Not applicable)
Secondary LU (Not applicable) Remote LU sends a BIND
SNAX/APN
dependent LU
support - XLF
Primary LU HP LU sends a BIND
(XLF is not involved)
When remote LU sends a
logon or INIT-SELF, P LU
sends a BIND
Secondary LU (SNALU only) HP LU
sends an INIT-SELF and
waits to receive a BIND
Remote LU sends a BIND
(XLF is not involved)
SNAX/APN-EN
dependent LU
support - ELF
Primary LU HP LU sends a BIND
(ELF is not involved)
When remote LU sends a
logon or INIT-SELF, HP LU
sends a BIND
Secondary LU (Not supported) Remote LU sends a BIND
(ELF is not involved)
Note. For SNAX/APN, there is no correlation between primary/secondary line and primary/secondary LU.