SNAX/XF and SNAX/APN Configuration and Management Manual

SNAX Quickstart and Overview
SNAX/XF and SNAX/APN Configuration and Management Manual—425836-006
1-9
SNAX Connectivity
The following documents contain detailed information:

For the SNALU, CRT, ITI, and PRT protocols provided by SNAX/XF, see the
SNAX/XF Application Programming Manual.

For the SNALU, CRT, and ITI protocols provided by SNAX/APN, see the
SNAX/APN Application Programming Manual.
Additional high-level SNAX APIs are available as separate products:

SNAX/APC facilitates writing applications for SNA LU6.2 sessions. SNAX/APC
uses the SNALU protocol with SNAX/XF and the SNALU/XS protocol with
SNAX/APN. The SNAX/APC API is described in the SNAX/APC Application
Programming Manual.

SNAX/HLS facilitates writing applications for SNA LU 0, 1, 2, 3, 4, and 7 sessions.
SNAX/HLS uses the SNAX SNALU protocol. The SNAX/HLS API is described in
the SNAX/HLS Application Programming Manual.
SNAX Connectivity
SNAX/XF and SNAX/APN both provide several types of connectivity. Essentially,
SNAX/XF provides SNA subarea networking, while SNAX/APN provides advanced
peer-to-peer networking (APPN). Multipoint lines may be shared by SNAX/XF and
SNAX/APN, and Expand can use SNAX/APN lines for transport across SNA networks.
SNAX/XF Connectivity
SNAX/XF provides the following types of connectivity:

Control and serve attached SNA peripheral nodes (SNA type 2 nodes).
Links to SNA peripheral nodes are called primary lines because the NonStop
system is the primary link station. Applications on the NonStop system can use the
CRT, ITI, PRT, SNALU, or SNAX/HLS APIs.

Communicate with attached SNA hosts.
Links to SNA hosts are called secondary lines because the NonStop system is the
secondary link station. Applications on the NonStop system can use SNAX/APC,
SNAX/HLS, or SNALU APIs.

Act as a transparent link between attached SNA peripheral nodes and attached
SNA hosts.
Primary and secondary lines are coupled to enable SNA session passthrough.
Figure 1-3 on page 1-10 shows SNAX/XF connectivity. For simplicity, the SNAX service
manager processes, SWAN concentrator, and SNA communication controllers are
omitted. Also, the processes shown here in a single NonStop system can be
distributed across an Expand network.