With Cisco PPDIOO, you keep assessing if the networks still meet the requirements. This approach may even work well for a very static environment but is likely to fall apart in the enterprise. You replace faulty devices one by one, as the faults dictate, and you are all set. Sometimes, customers think networks are just devices you plop there until they die. This already indicates that networks are different from what most people believe. Understanding this lifecycle will help you design beautiful networks. Cisco presents it in the Cisco PPDIOO: Prepare, Plan, Design, Implement, Operate, Optimize. To avoid the worst, you should know the lifecycle of a network. Since networks grow organically, you need to plan everything from the beginning. While this is important, today we will focus on network design. In fact, what separates you from tearing down the entire infrastructure is often a single command. There is an old saying that you should really apply to networking: think before you act.
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