CDP (Cisco Discovery Protocol)


Since the average life expectancy of a spartian warrior isn’t very promising, some of them decided to switch careers and become network engineer. The spartian engineers really enjoy CDP (Cisco Discovery Protocol) but they would like to tune some settings to their liking.


  • All IP addresses have been preconfigured for you (but you won’t really need them).
  • Make sure there are no CDP packets sent between router Gorgo and Theron.
  • Create a loopback0 interface on router Gorgo with IP address /24.
  • Configure router Gorgo so the IP address of the loopback0 interface will show up in CDP advertisements.
  • Configure all routers to send CDP packets every 5 seconds.
  • Configure router Leonidas so it tells it’s neighbors to keep CDP packets for 20 seconds.
  • Configure all routers so CDP doesn’t log any duplex mismath errors.




Cisco Discovery Protocol (CDP)

Video Solution:

Configuration Files

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Once you are logged in you will find the configuration files right here.

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Written by René Molenaar - CCIE #41726

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About the Author: Rene Molenaar

René - CCIE #41726 is the creator of where he shares CCNA, CCNP and CCIE R&S labs. He also blogs about networking on


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