SNAX/XF and SNAX/APN Configuration and Management Manual

SNAX Quickstart and Overview
SNAX/XF and SNAX/APN Configuration and Management Manual—425836-006
1-6
Changing SNAX Configurations

Enhanced system services (ESS) table
The ESS table is the NonStop equivalent to an IBM unformatted system services
(USS) table. An ESS table sends messages to or interprets character strings
received from SNA peripheral nodes. For example, the ESS allows SNAX to
provide welcome menus and to allow character-coded logons,

BIND table
The BIND table is the NonStop equivalent to an IBM logon mode (LOGMODE)
table. The BIND table contains one or more BIND images used if custom BINDs
are required when sessions are established.
Although SNAX provides default SET and BIND tables, custom tables are required in
many configurations. The SNAX Utility Program (SNAXUTL) defines all three tables.
SET and ESS tables are discussed (where applicable) in Sections 3 and 5.
Changing SNAX Configurations
You can change your SNAX configuration in two ways:

Issue SCF ALTER commands to the WAN subsystem DEVICE objects
representing SNAX service manager processes and SNAX line handler processes.
These commands change certain SNAX service manager and line handler
characteristics. These changes update the system configuration database and
persist through system load and processor reload. The command syntax is
described in the WAN Subsystem Configuration and Management Manual.

Issue SCF ALTER commands to SNAX subsystem SUBSYS, LINE, PU, LU, and
APPL objects.
These commands change the attributes of the specified SNAX objects. The
changes persist only until the object or SNAX subsystem is stopped. The
command syntax and attributes are described in Section 13, SCF Commands for
SNAX/XF and SNAX/APN.
SNAX Processes
A SNAX subsystem consists of several line handler processes and a service manager
process, as shown in Figure 1-2
on page 1-7.

The line handler processes provide an interface to NonStop applications and
manage data transfer on SNAX lines.

The service manager process provides an interface to various management
utilities and manages the line handler processes.