Chapter 9. Troubleshooting OSPF

Nothing has changed, and anything we did change we changed back.

—Anonymous

This chapter builds on the design theories and OSPF communication processes discussed throughout the book prior to this chapter. The basis for this chapter is how to go about monitoring OSPF to ensure that it is operating correctly and what to do if it is not. This chapter also covers specific troubleshooting procedures and techniques that you can use to determine the causes of a network problem.

Understanding the commands necessary to troubleshoot and diagnose the inevitable OSPF operational problems requires a strong chapter to provide you with the techniques needed to troubleshoot more effectively when an OSPF-related network problem ...

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