Chapter 2. What's in Your Tool Bag?

One of your objectives thus far is for you to shoot trouble rather than let trouble shoot you. When confronted with network problems, it is of utmost importance for you to define the problem, gather facts, and consider various possibilities based on those facts. The connection may not be possible, for example, or perhaps the data transfer is just slow. Higher-level processes may provide error-checking issues, retransmission problems, routed and routing protocol issues, and other problems. Lower-level data-link targets are basically interfaces and controllers. This chapter reviews the output of some basic IOS commands to assist you in identifying trouble-shooting targets and to prove this bottom-up troubleshooting ...

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