Introduction to SNA Capabilities of Tandem NonStop Systems

Connectivity
Introduction to SNA Capabilities of Tandem NonStop Systems–134597
2-4
Controlling SNA Devices Served by a Separate SNA
Host
of your network even if one service manager process should fail. This feature also
provides support for massively parallel processing for very large networks of SNA
devices.
Controlling SNA Devices Served by a Separate SNA
Host
SNAX/XF software enables a Tandem NonStop system to transparently pass SNA data
streams between SNA devices (type 2.0 nodes or type 1 nodes) controlled by Tandem
systems and SNA host applications (see Figure 2-2).
This mode of operation is called SNA session passthrough. It offloads device control
from the SNA host and allows the devices to access both Tandem applications and SNA
host applications. The SNA devices must be attached through type 2.0 nodes. SNAX/XF
software is required in the Tandem system(s) to which the type 2.0 nodes and SNA host
are attached.
Figure 2-2. Controlling SNA Devices Served by a Separate SNA Host
SNA Host
Appl
Tandem
NonStop System
SNAX/XF
3270 Devices
Cluster
Controller
IBM PC in 3270
emulation mode
003
Communication
Controller