DECnet-Plus
Problem Solving

Contents (summary)

• Chapter 1 Fault-Isolation Overview
• Chapter 2 Preparing for Problem Solving
• Chapter 3 Testing Network Reachability
• Chapter 4 Solving Problems Using DECnet Over TCP/IP
• Chapter 5 Solving DECnet-Plus Application Problems
• Chapter 6 Solving Session Control Problems
• Chapter 7 Solving Transport Problems
• Chapter 8 Solving Network Layer Problems
• Appendix A Using the OSAKtrace Utility
• Appendix B DECnet-Plus Application Tracing Examples
• Index
• Figures
• Tables

Contents

• ---

  Chapter 1 Fault-Isolation Overview
  • 1.1 Understanding the DECnet-Plus Network Model
    • 1.1.1 OSI Network Layer Functions
    • 1.1.2 DNA Layer Functions
    • 1.1.3 TCP/IP Interoperability
  • 1.2 Classifying Problems
    • 1.2.1 Reproducible Problems
    • 1.2.2 Intermittent Problems
    • 1.2.3 Transient Problems
  • 1.3 DECnet-Plus Component Relationships
    • 1.3.1 Component Relationships (OpenVMS Only)
    • 1.3.2 Component Relationships (Digital UNIX Only)
  • 1.4 Methods for Isolating Faults
    • 1.4.1 Questions to Ask Yourself
    • 1.4.2 Fault Isolation in the DECnet-Plus Environment
    • 1.4.3 DECnet-Plus Fault-Isolation Methodology
    • 1.4.4 Isolating Faults for Reproducible Problems
    • 1.4.5 Isolating Faults for Intermittent or Transient Problems
    • 1.4.6 Documenting the Fault-Isolation Process and Problem Solution

• ---

  Chapter 2 Preparing for Problem Solving
  • 2.1 DECnet-Plus Symptom Table
  • 2.2 Types of Problem-Solving Information
    • 2.2.1 Definitions
    • 2.2.2 Tools and Commands to Use
  • 2.3 Understanding Your Network Topology
    • 2.3.1 The decnet_migrate Tool
    • 2.3.2 When to Use the decnet_migrate Tool
    • 2.3.3 References
  • 2.4 Recognizing Node Names and Synonyms
    • 2.4.1 Identifying Node Names
    • 2.4.2 Finding Node Names and Node Synonyms
  • 2.5 Finding the Operating System and Version
  • 2.6 Getting DECnet-Plus Circuit Information
    • 2.6.1 Routing DECnet-Plus Circuit Information for Problem Solving
    • 2.6.2 Finding Routing Circuit Names, Types, States, and Adjacencies
    • 2.6.3 Considerations for Broadcast Circuit Adjacencies
  • 2.7 Preparing to Find a Network Path
    • 2.7.1 Types of Network Information to Find
    • 2.7.2 Finding Node Addresses for Node Names
    • 2.7.3 Determining Network Entity Titles for DECnet-Plus Nodes
    • 2.7.4 Converting Phase IV Addresses to NSAPs
    • 2.7.5 Converting NSAP Addresses to Phase IV Format
  • 2.8 Tracing DECnet-Plus Network Paths
    • 2.8.1 Tracing the Network Path of DECnet-Plus Nodes
    • 2.8.2 Tracing a Network Path in a Mixed Environment
    • 2.8.3 X.25 DA Circuit Considerations
    • 2.8.4 NCL Takes Long Time While Translating Addresses to Names

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  Chapter 3 Testing Network Reachability
  • 3.1 Types of Network Reachability Tests
    • 3.1.1 Types of Loopback Tests
    • 3.1.2 Using Loopback Tests on Phase IV Nodes
    • 3.1.3 Types of dts/dtr Tests
  • 3.2 OSI Echo Function Overview (Digital UNIX Only)
    • 3.2.1 OSI ping Command Syntax
    • 3.2.2 Restrictions
  • 3.3 Node-Level Loopback Tests Overview
    • 3.3.1 When to Use Node-Level Loopback Tests
    • 3.3.2 Analyzing Local-to-Local Node Loopback Test Results
    • 3.3.3 Log File for Local-to-Local Node Loopback Tests
    • 3.3.4 Local-to-Local Node Loopback Figure
    • 3.3.5 Analyzing Local-to-Remote Node Loopback Test Results
    • 3.3.6 Local-to-Remote Loopback Test Figure
  • 3.4 Running Node-Level Loopback Tests
    • 3.4.1 Node-Level Loopback Command Parameters
    • 3.4.2 Example of Node-Level Loopback Test
  • 3.5 Circuit-Level Loopback Test Overview
    • 3.5.1 Circuit-Level Loopback Test Figure
    • 3.5.2 Identifying Node Addresses for Circuit-Level Loopback Tests
  • 3.6 Preparing for Circuit-Level Loopback Tests
    • 3.6.1 Example of Circuit-Level Loopback Preparation
  • 3.7 Running Circuit-Level Loopback Tests
    • 3.7.1 Circuit-Level Loopback Command Parameters
    • 3.7.2 Example of Circuit-Level Loopback Test
  • 3.8 Running Circuit-Level Loopback Tests with Assistance
    • 3.8.1 When to Use Assistance
    • 3.8.2 Using Assistance for Fault Isolation
    • 3.8.3 Starting a Circuit-Level Loopback Test with Assistance
    • 3.8.4 Assistance Parameters
    • 3.8.5 Example of Circuit-Level Loopback Test with Full Assistance
    • 3.8.6 Example of Circuit-Level Loopback Test with Transmit Assistance
    • 3.8.7 Example of Circuit-Level Loopback Test with Receive Assistance
  • 3.9 Running LAN Loopback Tests with LLC Messages
    • 3.9.1 Starting the LAN Loopback Test
    • 3.9.2 LAN Loopback Test Command Parameters
    • 3.9.3 Determining Logical Link Control Types on a Remote Node
  • 3.10 Running dts/dtr Tests
    • 3.10.1 Starting dts/dtr Tests
    • 3.10.2 dts Command Syntax
    • 3.10.3 General Command Syntax Conventions
    • 3.10.4 Examples of Using dts/dtr Test Command Procedures
  • 3.11 Running dts/dtr Connect Tests
    • 3.11.1 dts/dtr Connect Test Command Syntax
    • 3.11.2 Example of dts/dtr Connect Test Command
  • 3.12 Running dts/dtr Data Tests
    • 3.12.1 dts/dtr Data Test Command Syntax
    • 3.12.2 Example of dts/dtr Data Test Command
  • 3.13 Running dts/dtr Disconnect Tests
    • 3.13.1 dts/dtr Disconnect Test Command Syntax
    • 3.13.2 Example of dts/dtr Disconnect Test Command
  • 3.14 Running dts/dtr Interrupt Tests
    • 3.14.1 Interrupt Test Command Syntax
    • 3.14.2 Example of dts/dtr Interrupt Test Command

• ---

  Chapter 4 Solving Problems Using DECnet Over TCP/IP
  • 4.1 Local IP Address Displays As 0.0.0.0
  • 4.2 Troubleshooting

• ---

  Chapter 5 Solving DECnet-Plus Application Problems
  • 5.1 Underlying Components for DECnet-Plus Applications (OpenVMS Only)
  • 5.2 Underlying Components for DECnet/OSI Applications Digital UNIX Only
  • 5.3 Symptoms of DECnet-Plus Application Problems
    • 5.3.1 Problem Symptoms for All Systems
    • 5.3.2 Problem Symptoms for OpenVMS Systems Only
    • 5.3.3 Problem Symptoms for Digital UNIX Systems Only
  • 5.4 Isolating DECnet-Plus Application Faults
    • 5.4.1 Tools to Use
    • 5.4.2 References
  • 5.5 Using Event Logging and Log Files
    • 5.5.1 Enabling Network Event Logging (OpenVMS Only)
    • 5.5.2 Using the FTAM Responder Log File (OpenVMS Only)
  • 5.6 Isolating Faults Using Management Tools (OpenVMS Only)
  • 5.7 Tracing Overview
    • 5.7.1 Trace Files
    • 5.7.2 Security Information in Tracing
  • 5.8 Tracing Outbound FTAM and Virtual Terminal Connections
    • 5.8.1 Generating a Readable Trace File
    • 5.8.2 ositrace Command Options (Digital UNIX Only)
  • 5.9 Tracing Inbound FTAM and Virtual Terminal Connections
    • 5.9.1 Inbound FTAM and VT Tracing (Digital UNIX)
    • 5.9.2 Inbound FTAM Tracing (OpenVMS)
    • 5.9.3 Inbound VT Tracing (OpenVMS)
  • 5.10 Reading Trace Files
    • 5.10.1 Interpreting Trace Information
  • 5.11 Correcting FTAM Application Problems
  • 5.12 Correcting FTAM File-Handling Problems
    • 5.12.1 Checking Foreign Filename Formats
    • 5.12.2 Correcting File Problems
  • 5.13 Correcting General FTAM Connection Problems
  • 5.14 Correcting FTAM and Virtual Terminal Connection Problems (Digital UNIX Only)
    • 5.14.1 Address in Use
    • 5.14.2 Network Is Unreachable
    • 5.14.3 Connection Refused
    • 5.14.4 Connection Timed Out
  • 5.15 Correcting FTAM and Virtual Terminal Responder Problems (OpenVMS Only)
    • 5.15.1 Correcting Unexpected Termination Problems
    • 5.15.2 Correcting Responder Starting Problems
  • 5.16 Correcting FTAM and Virtual Terminal Responder Problems (Digital UNIX Only)
  • 5.17 Correcting FTAM Environment Problems (OpenVMS Only)
  • 5.18 Correcting Target SAP Connection Problems
    • 5.18.1 Correcting FTAM Physical and Data Link Problems
    • 5.18.2 Correcting Network Connection Problems
    • 5.18.3 Correcting FTAM and VT Transport Problems
    • 5.18.4 Correcting FTAM and VT Session Problems (OpenVMS Only)
    • 5.18.5 Correcting FTAM and VT Presentation Problems (OpenVMS Only)
  • 5.19 Correcting Problems with Applications Using OSAK
    • 5.19.1 Correcting Connection Problems
    • 5.19.2 Correcting Unexpected Termination Problems
    • 5.19.3 Correcting Programming Problems

• ---

  Chapter 6 Solving Session Control Problems
  • 6.1 Underlying Components for Session Control (OpenVMS Only)
  • 6.2 Underlying Components for Session Control (Digital UNIX Only)
    • 6.2.1 References
  • 6.3 Symptoms of Session Control Problems
  • 6.4 Isolating Session Control Faults
    • 6.4.1 Tools and Commands to Use
    • 6.4.2 Fault-Isolation Methodology
  • 6.5 Correcting Unknown Application Problems
  • 6.6 Correcting Application Too Busy Problems
  • 6.7 Correcting Access Control Problems
    • 6.7.1 Correcting Proxy Access Problems (OpenVMS Only)
    • 6.7.2 Correcting Proxy Access Problems (Digital UNIX Only)
    • 6.7.3 Correcting Node Name Validation Problems
  • 6.8 Correcting Insufficient Resource Problems
  • 6.9 Correcting Timed Out Problems
  • 6.10 Correcting Node Name Resolution Problems
    • 6.10.1 Monitoring Search Path Processing (OpenVMS Only)
    • 6.10.2 Tracing Node Name Resolution Problems (Digital UNIX Only)
    • 6.10.3 Displaying Search Path Information
    • 6.10.4 Identifying Namespace Consistency Problems
  • 6.11 Examining the DECnet-Plus Naming Cache (OpenVMS Only)
    • 6.11.1 Managing the Naming Cache
    • 6.11.2 Dumping the Naming Cache

• ---

  Chapter 7 Solving Transport Problems
  • 7.1 Underlying Components (OpenVMS Only)
  • 7.2 Underlying Components (Digital UNIX Only)
  • 7.3 Symptoms of Transport Problems
  • 7.4 Isolating Transport Layer Problems
    • 7.4.1 Tools to Use
    • 7.4.2 Fault-Isolation Methodology
  • 7.5 Correcting Connection Problems
    • 7.5.1 Checking Ports
    • 7.5.2 Checking NSAP Counters
  • 7.6 Correcting OSI Transport Over CLNS Connection Problems
  • 7.7 Correcting OSI Transport Over CONS (X.25) Connection Problems
  • 7.8 Troubleshooting RFC 1006
    • 7.8.1 Common Problems

• ---

  Chapter 8 Solving Network Layer Problems
  • 8.1 Underlying Entities (OpenVMS Only)
  • 8.2 Underlying Entities (Digital UNIX Only)
  • 8.3 Symptoms of Network Layer Problems
  • 8.4 Isolating Network Layer Problems
    • 8.4.1 Tools to Use
    • 8.4.2 Fault-Isolation Methodology
  • 8.5 Finding Underlying Entities
    • 8.5.1 Finding the Underlying Entities for HDLC Circuits
    • 8.5.2 Finding the HDLC Circuits for a Physical Device
    • 8.5.3 Finding the Underlying Entities for DDCMP Circuits (OpenVMS Only)
    • 8.5.4 Finding the DDCMP Circuits for a Physical Device (OpenVMS Only)
    • 8.5.5 Finding the Underlying Entities for CSMA-CD Circuits
    • 8.5.6 Finding the CSMA-CD Circuit for a Physical Device
    • 8.5.7 Finding the Underlying Entities for FDDI Circuits
    • 8.5.8 Finding the FDDI Circuit for a Physical Device
    • 8.5.9 Finding the Underlying Entities for Token Ring Circuits (Digital UNIX Only)
    • 8.5.10 Finding the Token Ring Circuit for a Physical Device (Digital UNIX Only)
  • 8.6 Correcting Configuration Problems
    • 8.6.1 Correcting DDCMP (OpenVMS Only) and HDLC Data Link Configuration Problems
    • 8.6.2 Correcting CSMA-CD Data Link Configuration Problems
  • 8.7 Correcting Connectivity Problems

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  Appendix A Using the OSAKtrace Utility

• ---

  Appendix B DECnet-Plus Application Tracing Examples
  • B.1 DECnet-Plus Application Trace Example
    • B.1.1 Association Establishment --- Initiator
    • B.1.2 Association Establishment --- Responder
    • B.1.3 Passing User Data --- Responder

• ---

  Index

• ---

  Figures
  • 1-1 DECnet-Plus Network Model
  • 1-2 Component Relationships (OpenVMS)
  • 1-3 Component Relationships (Digital UNIX)
  • 1-4 Fault-Isolation Methodology (General)
  • 3-1 Local-to-Local Loopback Test
  • 3-2 Local-to-Remote Loopback Test
  • 3-3 Circuit-Level Loopback Test
  • 3-4 Circuit-Level Loopback Test with Full Assistance
  • 3-5 Circuit-Level Loopback Test with Transmit Assistance
  • 3-6 Circuit-Level Loopback Test with Receive Assistance
  • 5-1 Underlying DECnet-Plus Components (OpenVMS)
  • 5-2 Underlying DECnet/OSI Components (Digital UNIX)
  • 6-1 Underlying Components for Session Control (OpenVMS)
  • 6-2 Underlying Components for Session Control (Digital UNIX)
  • 6-3 Fault-Isolation Methodology (Session Control)
  • 7-1 Underlying Components (OpenVMS)
  • 7-2 Underlying Components (Digital UNIX)
  • 7-3 Fault-Isolation Methodology (Transport)
  • 8-1 Underlying Entities (OpenVMS)
  • 8-2 Underlying Entities (Digital UNIX)
  • 8-3 Fault-Isolation Methodology (Circuit Connectivity)

• ---

  Tables
  • 1-1 OSI Network Layers
  • 1-2 DNA Network Layers
  • 2-1 DECnet-Plus Symptom Table
  • 2-2 Problem Solving Tools and Commands
  • 2-3 Phase IV and DECnet-Plus Node Name Differences
  • 2-4 Types of Network Information to Trace
  • 5-1 Symptoms and Problems for All Systems
  • 5-2 Symptoms and Problems for OpenVMS
  • 5-3 Symptoms and Problems for Digital UNIX
  • 5-4 Tools for Isolating Application Faults
  • 5-5 ositrace Command Options
  • 6-1 Symptoms of Session Control Problems
  • 8-1 Symptoms of Network Layer Problems

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