OSI/MHS Configuration and Management Manual

OSI/MHS Configuration and Management Manual—424827-003

D-1

OSI Address Configuration in

OSI/MHS

This appendix describes how to configure the OSI addresses in an OSI/MHS

subsystem to allow connections to other NonStop™ MTAs and MTAs from different

vendors.

OSI addressing is a complex area in an X.400 environment. Much of this complexity is

due to the flexibility that is allowed in configuring OSI/MHS subsystems. To present

the addressing requirements in a clear and concise way, this document defines a

notation enabling the various address components to be identified consistently. You

might want to scan this appendix once to become familiar with the notation and major

concepts, then read it closely for the details.

Overview

An OSI address consists of a set of layer addresses that forms a complete path

through the seven-layer OSI model. Typically, this address consists of an NSAP

address and, optionally, a Transport selector (TSEL), a Session selector (SSEL), and a

Presentation selector (PSEL). Address components must be configured in both the

OSI/MHS subsystem and the OSI stack (OSI/AS and OSI/TS).

There are two approaches to configuring addresses: you can create separate files for

the stack configuration and for the OSI/MHS configuration, or you can configure the

stack and OSI/MHS (as well as other OSI-based applications) in a single file. Each

approach is described below.

Configuring the OSI Stack and OSI/MHS in One File

Putting the stack configuration and the OSI/MHS configuration in one file allows you to

manage all of the OSI communications layers through one OSI manager. A

recommended procedure follows.

1. Create a clean environment.

a. Stop all OSI processes and delete any unwanted database files.

b. Make sure that X25AM, and TLAM (in D-series RVUs) or PAM (in G06 and

later RVUS) lines are stopped and that these line have been set with the

correct parameters.

Note. For complete information on OSI stack configuration, see the OSI/AS Configuration and

Management Manual and the OSI/MHS SCF Reference Manual. For information on

configuring the OSI stack and OSI/MHS to connect to the Internet by means of TCP/IP, see the

OSI/AS and OSI/TS Supplement (Includes RFC-1006) Support).