Network Troubleshooting Tools
OReilly - Network Troubleshooting ToolsTable of Content
Table of Content........................................................................................................... ii
Preface.......................................................................................................................... v
Audience................................................................................................................... vi
Organization............................................................................................................. vi
Conventions ............................................................................................................. ix
Acknowledgments................................................................................................... ix
Chapter 1. Network Management and Troubleshooting........................................ 1
1.1 General Approaches to Troubleshooting....................................................... 1
1.2 Need for Troubleshooting Tools...................................................................... 3
1.3 Troubleshooting and Management................................................................. 5
Chapter 2. Host Configurations................................................................................ 14
2.1 Utilities............................................................................................................... 15
2.2 System Configuration Files............................................................................ 27
2.3 Microsoft Windows .......................................................................................... 32
Chapter 3. Connectivity Testing............................................................................... 35
3.1 Cabling .............................................................................................................. 35
3.2 Testing Adapters.............................................................................................. 40
3.3 Software Testing with ping............................................................................. 41
3.4 Microsoft Windows .......................................................................................... 54
Chapter 4. Path Characteristics............................................................................... 56
4.1 Path Discovery with traceroute...................................................................... 56
4.2 Path Performance............................................................................................ 62
4.3 Microsoft Windows .......................................................................................... 77
Chapter 5. Packet Capture ....................................................................................... 79
5.1 Traffic Capture Tools ...................................................................................... 79
5.2 Access to Traffic .............................................................................................. 80
5.3 Capturing Data................................................................................................. 81
5.4 tcpdump............................................................................................................. 82
5.5 Analysis Tools .................................................................................................. 93
5.6 Packet Analyzers............................................................................................. 99
5.7 Dark Side of Packet Capture ....................................................................... 103
5.8 Microsoft Windows ........................................................................................ 105
Chapter 6. Device Discovery and Mapping.......................................................... 107
6.1 Troubleshooting Versus Management ....................................................... 107
6.2 Device Discovery........................................................................................... 109
6.3 Device Identification...................................................................................... 115
6.4 Scripts.............................................................................................................. 119
6.5 Mapping or Diagramming............................................................................. 121
6.6 Politics and Security...................................................................................... 125
6.7 Microsoft Windows ........................................................................................ 126
Chapter 7. Device Monitoring with SNMP............................................................ 128
7.1 Overview of SNMP........................................................................................ 128
7.2 SNMP-Based Management Tools .............................................................. 132
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7.3 Non-SNMP Approaches ............................................................................... 154
7.4 Microsoft Windows ........................................................................................ 154
Chapter 8. Performance Measurement Tools ..................................................... 158
8.1 What, When, and Where.............................................................................. 158
8.2 Host-Monitoring Tools................................................................................... 159
8.3 Point-Monitoring Tools.................................................................................. 160
8.4 Network-Monitoring Tools ............................................................................ 167
8.5 RMON.............................................................................................................. 176
8.6 Microsoft Windows ........................................................................................ 179
Chapter 9. Testing Connectivity Protocols........................................................... 184
9.1 Packet Injection Tools................................................................................... 184
9.2 Network Emulators and Simulators ............................................................ 193
9.3 Microsoft Windows ........................................................................................ 195
Chapter 10. Application-Level Tools ..................................................................... 197
10.1 Application-Protocols Tools ....................................................................... 197
10.2 Microsoft Windows ...................................................................................... 208
Chapter 11. Miscellaneous Tools .......................................................................... 209
11.1 Communications Tools............................................................................... 209
11.2 Log Files and Auditing................................................................................ 213
11.3 NTP................................................................................................................ 218
11.4 Security Tools .............................................................................................. 220
11.5 Microsoft Windows ...................................................................................... 221
Chapter 12. Troubleshooting Strategies............................................................... 223
12.1 Generic Troubleshooting............................................................................ 223
12.2 Task-Specific Troubleshooting.................................................................. 226
Appendix A. Software Sources .............................................................................. 234
A.1 Installing Software......................................................................................... 234
A.2 Generic Sources............................................................................................ 236
A.3 Licenses.......................................................................................................... 237
A.4 Sources for Tools .......................................................................................... 237
Appendix B. Resources and References ............................................................. 250
B.1 Sources of Information ................................................................................. 250
B.2 References by Topic..................................................................................... 253
B.3 References..................................................................................................... 256
Colophon ................................................................................................................... 259
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