Chapter 16. Network Address Translation

This chapter covers the following subjects:

  • Perspectives on IPv4 Address Scalability: This section explains the most significant need that drove the requirement for NAT back in the 1990s.

  • Network Address Translation Concepts: This section explains how several different variations of NAT work.

  • NAT Configuration and Troubleshooting: This section describes how to configure NAT, as well as how to use show and debug commands to troubleshoot NAT problems.

This chapter begins Part V, “Scaling the IP Address Space.” The two chapters in this part of the book relate to each other in that they explain the two most important solutions to what was a huge obstacle for the growth of the Internet. The problem was that the IPv4 ...

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