CONTENTS

  Title Page

  Copyright Page

  Preface

  1      Preplanning:  Understanding the Transition Process

  1.1     Transition Defined
    1.1.1      How Long Does Transition Take?
    1.1.2      What Is the Transition Environment?
    1.1.3      When Do DECnet/OSI Features Become Available?
    1.1.4      When Does Transition End?

  1.2     Transition Features

  1.3     Addressing
    1.3.1      Phase IV Addressing and DECnet/OSI Addressing:  A Comparison
    1.3.2      Advantages of Using DECnet/OSI Addressing That Is Also Phase IV Compatible
    1.3.3      Advantages of Using DECnet/OSI Addressing That Are Beyond Phase IV Limitations
    1.3.4      Advantages of Using Multihoming
    1.3.5      Autoconfiguration of Addresses

  1.4     Routing
    1.4.1      Interdomain Routing
    1.4.2      Level 2 Routing Between Phase IV and DECnet/OSI Areas
    1.4.3      Multivendor Routers

  1.5     Name Services and Time Service Requirements
    1.5.1      The Local Namespace
    1.5.2      The Name Service Search Path
    1.5.3      Name Service and Time Service Interdependencies

  1.6     VMSclusters (OpenVMS Only)

  1.7     DECnet Phase IV Applications
    1.7.1      DECnet for OpenVMS Phase IV Applications (OpenVMS Only)
    1.7.2      DECnet-ULTRIX Phase IV Applications (Digital UNIX Only)

  1.8     Network Management
    1.8.1      Managing a Mixture of DECnet/OSI and Phase IV Nodes
    1.8.2      Network Management Protocols
      1.8.2.1      Phase IV Protocols in User Applications (OpenVMS Only)
    1.8.3      Managing Multivendor OSI-Compliant Systems
    1.8.4      Adjusting Buffer Sizes During Transition
    1.8.5      Mapping Node Names to Addresses

  1.9     Noncompatibility with Pre-Phase IV Systems

  1.10    Products That Do Not Migrate to DECnet/OSI

  2      Planning the Transition

  2.1     Step 1:  Document the Current Network Configuration

  2.2     Step 2:  Determine Your Transition Strategy
    2.2.1      If the Network Is Not Moving Entirely to the DECnet/OSI Environment
    2.2.2      If the Network Is Moving Entirely to the DECnet/OSI Environment

  2.3     Step 3:  Develop a New Network Configuration
    2.3.1      Planning the New Network Configuration
      2.3.1.1      Single Extended-Area LANs
      2.3.1.2      End-System-Only LAN Configurations
      2.3.1.3      Multicircuit End-System Configurations
    2.3.2      Including Multivendor Systems in the Network
    2.3.3      Using the Inactive Network Layer Protocol
    2.3.4      Planning Addressing
      2.3.4.1      Do You Need a Unique IDP for Your Network?
      2.3.4.2      Do You Need DECnet/OSI Addresses?
      2.3.4.3      Considerations for a Network with DECnet/OSI Areas
    2.3.5      Planning Routing

  2.4     Step 4:  Plan for Your Name Services and the DECdts Time Service
    2.4.1      Choosing DECdns and DECdts Servers
    2.4.2      Creating Multiple Namespaces
    2.4.3      Preparing a DNS Version 1 Namespace for Use By DECnet/OSI

  2.5     Step 5:  Choose the First End System to Migrate

  3      Performing Transition Tasks: An Overview

  3.1     Tools:  Network Management, Node-Name Management, and Transition

  3.2     Immediate Tasks
    3.2.1      IDP Planning
    3.2.2      Using a Local Namespace: Migrating the Network
    3.2.3      Using a Distributed Namespace: Migrating the First End Node
      3.2.3.1      If the Network Does Not Have a Namespace
      3.2.3.2      If the Network Has a DNS Version 1 Namespace
    3.2.4      Using a Distributed Namespace: Migrating Subsequent End Nodes
      3.2.4.1      Registering a New System
      3.2.4.2      Registering a System You Migrated from Phase IV to DECnet/OSI
      3.2.4.3      Registering a System You Changed from DECnet/OSI to Phase IV
    3.2.5      Migrating VMScluster Nodes (OpenVMS Only)
    3.2.6      Migrating Local Area Networks
    3.2.7      Configuring a DECnet/OSI End System in a Multivendor OSI Network

  3.3     Additional Tasks
    3.3.1      Converting the Phase IV Object Database with the OBJTONCL Utility (Digital UNIX Only)
    3.3.2      Converting the Phase IV Proxy File (Digital UNIX Only)
    3.3.3      Converting the MOP Database (Digital UNIX Only)
    3.3.4      Becoming Familiar with NCL Commands, Network Management Modules, and Network Management Tasks

  3.4     Optional Tasks
    3.4.1      Setting Buffer Sizes
    3.4.2      Changing the Network's IDP and preDSP

  4      Creating NSAP Addresses

  4.1     IDP Values

  4.2     DSP Values

  4.3     NSAP Entry and Display Formats

  4.4     Converting Phase IV Addresses to NSAPs

  4.5     Converting NSAPs to Phase IV Addresses

  4.6     Forms of the NSAP Displayed by NCL

  4.7     How to Obtain a Unique IDP and PreDSP
    4.7.1      For a Private Network (AFI 49)
    4.7.2      Allocation Authority for Single-Country Organizations (AFI 39)
    4.7.3      Allocation Authority for International Organizations (AFI 47)
    4.7.4      Using an X.25 Data Network Address for the IDI (AFIs 37 and 53)
    4.7.5      Using a Telex Number for the IDI (AFIs 41 and 55)
    4.7.6      Using a Telephone Number for the IDI (AFIs 43 and 57)
    4.7.7      Using an ISDN Number for the IDI (AFIs 45 and 59)

  4.8     Example:  NSAP Fields

  4.9     Example:  Using Values Allocated by ANSI

  5      DECdns, Local Namespace, and DECdts Concepts

  5.1     How DECnet/OSI Uses the Local Namespace and DECdns

  5.2     The Name Service Search Path

  5.3     How DECdns Works

  5.4     Contents of a DECdns Namespace
    5.4.1      Replicas and Their Contents
      5.4.1.1      Object Entries
      5.4.1.2      Soft Links
      5.4.1.3      Child Pointers
    5.4.2      Putting It All Together

  5.5     How DECnet/OSI Uses the DECdns Namespace
    5.5.1      Node Object Entries
    5.5.2      Backtranslation Soft Links
    5.5.3      Node Synonyms

  5.6     How DECdns Protects Names
    5.6.1      Access Rights
    5.6.2      Access Control Groups

  5.7     DECdns Management

  5.8     How DECnet/OSI Uses DECdts

  5.9     DECdts Advantages
    5.9.1      Applications Support
    5.9.2      Automatic Time Zone Changes
    5.9.3      External Time-Provider Support
    5.9.4      Quantitative Inaccuracy Measurement

  5.10    How DECdts Works
    5.10.1     Clerks
    5.10.2     Servers
      5.10.2.1     Local Servers
      5.10.2.2     Global Servers
      5.10.2.3     Couriers

  5.11    DECdts Management

  6      Naming Guidelines

  6.1     General Naming Guidelines

  6.2     Guidelines for Naming Clearinghouses

  6.3     Guidelines for Naming Namespaces

  7      Basic DECdns Namespace Planning for DECnet/OSI

  7.1     Step 1:  Should You Have Multiple DECdns Namespaces?

  7.2     Step 2:  Plan a Naming Policy

  7.3     Step 3:  Should You Create a Directory Hierarchy?

  7.4     Step 4:  Plan an Access Control Policy

  7.5     Step 5:  Plan the Replication of Directories

  7.6     Step 6:  Select DECdns Servers
    7.6.1      Server Placement Guidelines for LANs and Extended LANs
    7.6.2      Server Placement Guidelines for Sites Connected by a WAN

  8      Advanced DECdns Namespace Planning

  8.1     Planning a Directory Hierarchy
    8.1.1      Consider Geographic and Functional Directory Names
    8.1.2      Plan Access Along with Directory Structure
    8.1.3      Other Directory Planning Tips

  8.2     Replicating Directories in a Large Network
    8.2.1      Replicating the DECnet/OSI Directories
    8.2.2      How Clearinghouse Names Affect Replication

  8.3     DECdns Server Capacity Planning

  9      DECdns Namespace Design Example

  9.1     Part 1:  Planning and Configuring the Namespace
    9.1.1      Designing the Directory Structure
    9.1.2      Planning Access Control
    9.1.3      Assessing Directory Contents
    9.1.4      Choosing Servers and Planning Replication

  9.2     Part 2:  The Namespace Grows

  10     Preparing for DECdts

  10.1    Planning a DECdts Implementation

  10.2    Configuration Planning on a LAN

  10.3    Configuration Planning on an Extended LAN
    10.3.1     Extended LANs Using High-Performance Bridges
    10.3.2     Extended LANs Using Medium-Speed Bridges

  10.4    Configuration Planning on WANs and WAN Links
    10.4.1     LANs with WAN Links to Remote Sites
    10.4.2     LANs Connected by WAN Links
    10.4.3     WAN Networks

  10.5    Planning for External Time-Providers

  10.6    DECdts Planning Worksheet

  FIGURES

  1-1        Examples of Phase IV and DECnet/OSI Addresses

  2-1        Multicircuit End System with Circuits to Two Ethernet LANs

  2-2        Multicircuit End System with Two DDCMP Circuits

  3-1        Two-Area Phase IV LAN to Be Migrated to DECnet/OSI

  3-2        Phase IV LAN with Some DECnet/OSI Systems

  3-3        LAN with Link State at Levels 1 and 2

  3-4        LAN with Multihomed Systems

  3-5        LAN with One DECnet/OSI Area

  4-1        Parts of an NSAP

  4-2        Example NSAP

  4-3        NSAP Fields:  DNA Format Examples

  4-4        NSAP Fields:  OSI Format Examples

  5-1        Sample DECdns LAN Configuration

  5-2        Simple Lookup

  5-3        Example Namespace Directory Hierarchy

  5-4        Components of a DECdns Server Node

  9-1        The IAF Network

  9-2        IAF Namespace Hierarchy

  9-3        Complete IAF Namespace Hierarchy

  9-4        Replication Plan for New York Servers

  9-5        Expanded IAF Network

  9-6        New Servers and Their Contents

  9-7        New York Server Contents a Year Later

  10-1       DECdts LAN Configuration

  10-2       DECdts Configuration - Unified Extended LAN

  10-3       DECdts Configuration - LAN with WAN Links

  10-4       DECdts Configuration - WAN Networks

  TABLES

  1-1        Comparison of Phase IV and DECnet/OSI Addresses

  2-1        Checklist of Transition Planning Activities

  3-1        Registering a New System

  3-2        Registering a System You Migrate from Phase IV to DECnet/OSI

  3-3        OBJTONCL Switches

  3-4        Management Tasks and Related Network Management Modules

  4-1        Information for Building Unique NSAPs

  4-2        Entering NSAP Field Values

  8-1        DECdns Memory Requirements

  9-1        IAF Corporation DECdns Server Plan