NET/MASTER Management Services (MS) System Management Guide

Configuring INMC Links
Supporting Remote Operations
105744 Tandem Computers Incorporated 9–5
Configuring INMC
Links
Configuring an INMC link is a multiple-step operation. You need not perform these
steps in any particular order. NonStop NET/MASTER MS does not use the
information provided in either phase until you start the INMC link. The steps can be
grouped into two phases:
Phase 1: If you want NonStop NET/MASTER MS to transfer data over SNA lines or
X.25 lines, configure the communications subsystems for use by NonStop
NET/MASTER MS. The objective in this phase is to provide for the most
efficient transfer of data blocks across communications lines.
Phase 2: Add link, session, and unit definitions to NonStop NET/MASTER MS. The
objective in this phase is to coordinate data transfer between INMC and the
communications subdevices configured in Phase 1. If communication occurs
within a single computer or across an Expand line, the steps in Phase 2
enable NonStop NET/MASTER MS to identify the name of the process that
performs INMC processing within the remote NonStop NET/MASTER MS
system.
After you have configured the link on each end of the logical connection, you must
start the link on each end before the connection becomes operational.
Phase 1: Configure
Communications
Subsystems
Use the Subsystem Control Facility (SCF) to configure communications devices and
subdevices with which INMC transfers data in these ways.
Configure communications line attributes to conform with guidelines provided in
this section.
The guidelines recommend values that allow for the most efficient transfer of
INMC data blocks. Efficiency is achieved by setting the transfer size attributes to a
value that minimizes the number of reads and writes required to transfer a single
INMC data block. Specific recommendations appear in “SNA Connection
Guidelines” and “X.25 Connection Guidelines,” later in this section.
Add and configure subdevices for use by INMC.
NonStop NET/MASTER MS uses subdevices for application-to-application
communication. Specific guidelines for configuring subdevices appear in “SNA
Connection Guidelines,” “X.25 Connection Guidelines,” and “Process-to-Process
Connection Guidelines,” later in this section.
Detailed descriptions of the SCF commands and attributes appear in the SCF Reference
Manual for SNAX/XF and the SCF Reference Manual for X25AM. Process-to-process
(PTP) connections require no subsystem configuration.