Creating a network map of the environment

 Creating a network map of the environment

4.1.4 This page will explain how the information that is obtained by CDP can be used to create a network map.

CDP was designed and implemented as a simple, low-overhead protocol. Though a CDP frame can be small, it can retrieve a lot of useful information about directly connected Cisco devices.

This information can be used to create a network map of the connected devices. To discover devices that are connected to neighbor devices, use Telnet to connect to the neighbors. Then use the show cdp neighbors command.

The Lab Activity will show students how to use CDP commands to learn about neighboring network devices.

The next page will describe how CDP can be disabled.