Manualshelf

Introduction to SNA Capabilities of Tandem NonStop Systems

ManualsBrandsHP ManualsServerHP Integrity NonStop H-Series
11121314151617181920
Connectivity
Introduction to SNA Capabilities of Tandem NonStop Systems–134597
2-2
SNAX Access Methods
SNAX Access Methods
In traditional SNA, SNA hosts perform one or both of the following roles:
•
Controlling SNA devices—for example, to activate and deactivate the devices, or to
establish and terminate sessions
•
Serving SNA devices with application or database services—for example, to
process online financial transactions
SNAX access methods enable a Tandem NonStop system to:
•
Serve and control a network of SNA devices
•
Control a network of SNA devices served by a separate SNA host
•
Serve a network of SNA devices controlled by a separate SNA host
In addition, SNA also allows various forms of application-to-application
communication. SNAX access methods enable a Tandem NonStop system to support
application-to-application communication with a range of SNA systems (PCs,
workstations, midsize systems such as the AS/400, and mainframes).
This section examines each of these capabilities in turn.
Note on Figures
In the figures in this and subsequent sections:
•
Bold face text is used to indicate the end users that are enabled to communicate.
•
Access methods are shown as a single process, although SNAX/XF and SNAX/APN
subsystems actually consist of a service manager process and one or more line
handler processes.
Serving and Controlling a Network of SNA Devices
SNAX/XF software enables a Tandem NonStop system to both serve and control
attached SNA type 2.0 and type 1 nodes. For example, the attached node might be SNA
cluster controller, branching to multiple 3270 display stations and printers (see
Figure 2-1
). Another example of an attached node might be an IBM personal computer
(PC) in 3270 emulation mode. The SNA devices can log onto, or be acquired by,
applications running anywhere in the Tandem Expand network (Expand is the Tandem
networking software used to connect NonStop systems).
Device-initiated logon uses the SNAX/XF LU network services (LUNS) interface; this
interface can be configured to provide welcome menus and simple character-coded
logons.
Corequisite Software
If you require Tandem applications to be started dynamically when devices log on, you
need Creator or SNAX Creator-2 software. This software starts the requested Tandem