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Network Troubleshooting Tools
Over the years, thousands of tools have been developed for
debugging TCP/IP networks. They range from very specialized
tools that do one particular task, to generalized suites
that do just about everything except replace bad Ethernet
cables. Even better, many of them are absolutely free.
There's only one problem: who has time
to track them all
down, sort through them for the best ones for a particular
purpose, or figure out how to use them?
Network Troubleshooting Tools does the work for you--by
describing the best of the freely available tools for
debugging and troubleshooting. You can start with a
lesser-known version of ping that diagnoses connectivity
problems, or take on a much more comprehensive program like
MRTG for graphing traffic through network interfaces.
There's tkined for mapping and automatically monitoring
networks, and Ethereal for capturing packets and debugging
low-level problems.
This book isn't just about the tools available for
troubleshooting common network problems. It also outlines a
systematic approach to network troubleshooting: how to
document your network so you know how it behaves under
normal conditions, and how to think about problems when they
arise, so you can solve them more effectively.
The topics covered in this book include:
Understanding your network
Connectivity testing
Evaluating the path between two network nodes
Tools for capturing packets
Tools for network discovery and mapping
Tools for working with SNMP
Performance monitoring
Testing application layer protocols
Software sources
If you're involved with network operations, this book will
save you time, money, and needless experimentation.
* Understanding your network
* Connectivity testing
* Evaluating the path between two network nodes
* Tools for capturing packets
* Tools for network discovery and mapping
* Tools for working with SNMP
* Performance monitoring
* Testing application layer protocols
* Software sources
Preface
1. Network Management and Troubleshooting
General Approaches to Troubleshooting
Need for Troubleshooting Tools
Troubleshooting and Management
2. Host Configurations
Utilities
System Configuration Files
Microsoft Windows
3. Connectivity Testing
Cabling
Testing Adapters
Software Testing with ping
Microsoft Windows
4. Path Characteristics
Path Discovery with traceroute
Path Performance
Microsoft Windows
5. Packet Capture
Traffic Capture Tools
Access to Traffic
Capturing Data
tcpdump
Analysis Tools
Packet Analyzers
Dark Side of Packet Capture
Microsoft Windows
6. Device Discovery and Mapping
Troubleshooting Versus Management
Device Discovery
Device Identification
Scripts
Mapping or Diagramming
Politics and Security
Microsoft Windows
7. Device Monitoring with SNMP
Overview of SNMP
SNMP-Based Management Tools
Non-SNMP Approaches
Microsoft Windows
8. Performance Measurement Tools
What, When, and Where
Host-Monitoring Tools
Point-Monitoring Tools
Network-Monitoring Tools
RMON
Microsoft Windows
9. Testing Connectivity Protocols
Packet Injection Tools
Network Emulators and Simulators
Microsoft Windows
10. Application-Level Tools
Application-Protocols Tools
Microsoft Windows
11. Miscellaneous Tools
Communications Tools
Log Files and Auditing
NTP
Security Tools
Microsoft Windows
12. Troubleshooting Strategies
Generic Troubleshooting
Task-Specific Troubleshooting
A. Software Sources
B. Resources and References
Index
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