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Cisco® Networking All-in-One For Dummies® by Edward Tetz

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Chapter 4: Easing Device Discovery with CDP

In This Chapter

check.png Learning what CDP is and how it operates

check.png Configuring CDP settings for your network devices

check.png Building a network diagram from CDP information

Cisco Discovery Protocol (CDP) is data link layer protocol that allows you to find information about the connections between devices. This chapter provides the basic information on how the protocol works and how to enable it on your devices. You also find out how to get information from your devices, including how they are connected to each other, how to view the debugging information, what you need to do if you encounter devices on which CDP is not running, and how to retrieve information from the system.

CDP is useful and easy to use, so you should start exploring a bit of your network using this default tool from Cisco. Because CDP runs on all modern Cisco equipment, you may as well work with this tool or at least know what it is doing over your network, even if you do not use the information it generates.

Discovering How CDP Operates

Cisco Discovery Protocol (CDP) is a nifty tool from Cisco that gives you a boost if your network is primarily made of Cisco devices because Cisco devices ...

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