4.1 Discovering and Connecting to Neighbors  
  4.1.4 Creating a network map of the environment  
CDP was designed and implemented as a simple, low-overhead protocol. Though a CDP frame can be small, it can retrieve a great deal of useful information about connected neighboring Cisco devices.

This information can be used to create a network map of the connected devices. Devices connected to neighboring devices can be discovered by using Telnet to connect to the neighbors, and using the show cdp neighbors command to discover what devices are connected to those neighbors.

 

Lab Activity

Lab Exercise: Creating a Network Map using CDP

In this lab, the students will use CDP commands to get information about neighboring network devices.