Troubleshooting is a skill that takes time and experience to fully
develop. To be successful when diagnosing and repairing network
failures, a good set of troubleshooting tools and skills is essential.
The information presented here is the foundation for the rest of the information covered on the
exam. This chapter emphasizes the importance of following a specific set of troubleshooting steps
when you try to diagnose and solve network problems. An effective troubleshooting methodology
is needed because of the complexity of today’s network environments. As a Cisco Certified Network
Professional (CCNP), you need to understand and know how to apply an efficient and systematic
troubleshooting methodology. Otherwise, you would be required to have a very intimate understanding
of the network you are troubleshooting. It is imperative that you learn troubleshooting
skills and understand the information available to you while solving network problems.