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Troubleshooting Methods for Cisco IP Networks

Chapter Description

This chapter from Troubleshooting and Maintaining Cisco IP Networks (TSHOOT) Foundation Learning Guide: (CCNP TSHOOT 300-135) defines troubleshooting and troubleshooting principles. Next, six different troubleshooting approaches are described. The third section of this chapter presents a troubleshooting example based on each of the six troubleshooting approaches.


The fundamental elements of a troubleshooting process are as follows:

  • Defining the problem
  • Gathering information
  • Analyzing information
  • Eliminating possible causes
  • Formulating a hypothesis
  • Testing the hypothesis
  • Solving the problem

Some commonly used troubleshooting approaches are as follows:

  • Top-down
  • Bottom-up
  • Divide-and-conquer
  • Follow-the-path
  • Compare-configurations
  • Swap-components
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