Configuring Integrated IS - IS

You cannot perform troubleshooting on an ad hoc basis in serious production environments; to effectively solve a problem, you must follow a specific methodology. This chapter presents three main approaches to troubleshooting and describes how to select a suitable troubleshooting approach for the problem at hand. As a troubleshooter, you must take your knowledge and aptitude into account and take the approach you feel is most suitable. With a method to follow, you can solve the problem more quickly and cost effectively than if you approached the problem haphazardly. After you have chosen an approach, do not switch to another one in the midst of the troubleshooting effort. Switching methods often causes confusion, wastes time and effort, and impedes the resolution efforts.