Introduction to Networking for NonStop S-Series Servers

HP NonStop S-Series Systems Network Architecture
(SNA) Network Connections
Introduction to Networking for HP NonStop S-Series Servers—520670-005
7-5
Integration With Existing Networks
Integration With Existing Networks
With SNAX products, NonStop S-series servers can be added to SNA networks with
minimal changes to the system configurations in the SNA network. You need not install
any software on the IBM host. With the base SNAX/APN product, the
NonStop S-series server can function as a LEN node; with the extended version,
SNAX/APN-EN, it acts as an end node.
Online Reconfiguration
Once the physical hardware is defined, you can dynamically change the configuration
of SNAX products using the Distributed Systems Management (DSM) Subsystem
Control Facility (SCF). You can add, delete, start, and stop most resources dynamically
and can change session parameters such as device or LU type.
High-Level and Low-Level Interfaces and Development Tools
To facilitate application development, the SNAX product set offers numerous
programmatic interfaces: a high-level interface for communicating with 3270 terminals;
a low-level interface (SNALU) that lets you control SNA message flows; a high-level
interface—SNAX Advanced Program Communication (SNAX/APC)—for
communicating with LU 6.2 applications; and a high-level interface—SNAX High-Level
Support (SNAX/HLS)—for communicating with LU types 0, 1, 2, 3, 4, and 7. The
SNAX/APC and SNAX/HLS products include application prototypes services and other
program-development aids.
SNAX Common Programming Interface for Communications (SNAX/CPI-C) works with
SNAX/APC and uses the LU 6.2 protocol. SNAX/CPI-C provides an easy-to-use,
platform-independent programming interface for transaction programs (TPs) that
require program-to-program communication.
Passthrough and Application Switching
To facilitate integration of NonStop S-series servers into SNA networks and to support
migration of applications to NonStop S-series servers, one SNAX product, SNAX/XF,
supports a feature called passthrough. This feature allows a 3270 terminal attached to
the NonStop S-series server to switch between HP and IBM applications. SNAX/XF
supports session network services: users log onto HP applications using IBM
procedures. No IBM host resources are required once the user has logged on.
Passthrough facilitates migration because it makes it easy for you to add HP
applications while maintaining the IBM style of user interface and access to SNA
applications that still run in other domains.