NAT Virtual Interface


After passing the CCNA exam you feel like you could do anything with NAT. You just started at a new job as a junior network engineer but to your surprise the router you are working on doesn’t have any “inside” or “outside” commands. It does create a NVI interface but you have no idea what it is…let’s see if you can configure NAT anyway…


  • All IP addresses have been preconfigured for you.
  • Configure NAT so hosts on network /24 are translated to network /24.
  • You are not allowed to use the “ip nat inside” or “ip nat outside” command.




NAT Virtual Interface

Video Solution:

Configuration Files

You need to register to download the GNS3 topology file. (Registration is free!)

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


  1. Great Lab. Used to inside/outside. A nice different approach. Any advantage?

  2. Bro,

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    Greetings from an Arabian Land


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