SNAX/XF and SNAX/APN Configuration and Management Manual

SNAX Quickstart and Overview
SNAX/XF and SNAX/APN Configuration and Management Manual—425836-006
1-7
SNAX Lines
Multiple service managers (and, hence, multiple SNAX subsystems) can coexist within
a single NonStop system. This has distinct benefits:

One NonStop system can control a large network of SNA devices.

A SNAX network can be partitioned into separate subnetworks (for example, for
production and development), each controlled by a separate service manager.

One service manager can take over another’s line handler processes for planned
maintenance or if one service manager fails.

Configuration and start-up of SNAX resources is much faster when performed in
parallel through several service managers than through a single service manager.
SNAX Lines
The ServerNet wide area network (SWAN) concentrator provides WAN connectivity to
NonStop S-series servers through several downloadable WAN protocols, including
SDLC and X.25. The SWAN concentrator is configured and managed through the
WAN subsystem.
A SNAX line handler process manages data transfer between an application and a
SNAX line, meaning one of the following:

A physical point-to-point or multipoint line using SDLC protocol

An internal connection to one or more X.25 virtual circuits (controlled by one or
more X25AM I/O processes)
SNAX lines are assigned a line type and called nonswitched or switched, as shown
in Table 1-2
on page 1-8.
Figure 1-2. SNAX Processes
SNAX
Service Manager
SNAX Line
Handler
SNAX Line
Handler
SNAX Line
Handler
VST102.vsd