Establishing a Baseline
As previously mentioned, troubleshooting involves knowing what should be happening on the network, observing what is currently happening on the network, and determining the difference between the two. To determine what should be happening on the network, a baseline of network performance should be measured as part of a routine maintenance procedure and updated on a regular basis.
For example, a routine network maintenance procedure might require that a show processes cpu command be periodically issued on all routers in a network, with the output logged and archived. As shown in Example 1-2, the show processes cpu command ...
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