Book Image

VMware NSX Network Essentials

By : sreejith c
Book Image

VMware NSX Network Essentials

By: sreejith c

Overview of this book

VMware NSX is at the forefront of the software-defined networking revolution. It makes it even easier for organizations to unlock the full benefits of a software-defined data center – scalability, flexibility – while adding in vital security and automation features to keep any sysadmin happy. Software alone won’t power your business – with NSX you can use it more effectively than ever before, optimizing your resources and reducing costs. Getting started should be easy – this guide makes sure it is. It takes you through the core components of NSX, demonstrating how to set it up, customize it within your current network architecture. You’ll learn the principles of effective design, as well as some things you may need to take into consideration when you’re creating your virtual networks. We’ll also show you how to construct and maintain virtual networks, and how to deal with any tricky situations and failures. By the end, you’ll be confident you can deliver, scale and secure an exemplary virtualized network with NSX.
Table of Contents (15 chapters)
VMware NSX Network Essentials
Credits
Foreword
About the Author
About the Reviewer
www.PacktPub.com
Preface

NSX Edge NAT


How do we merge two intranets with duplicate addresses and ensure that the host assigned with a private IP can communicate with other hosts through the Internet? There is only one solution for it: Network Address Translation (NAT).

NSX Edge NAT supports two types of NAT services:

  • Source NAT (SNAT): Translates the internal private IP address to a public address for outbound access

  • Destination NAT (DNAT): Translates the public IP address to an internal private address for inbound access

Okay, let's have a look at how this whole feature works. In the following figure, one of our application servers is in need of communicating with the public network. We can see the application server 172.16.20.1 sending an outbound packet to NSX Edge. Based on the NAT entries, which the NSX administrator would have configured earlier, Edge will perform a NAT table lookup. Since we have a Source NAT, which is configured for 172.16.20.1, it will translate the IP to 170.168.2.1, which is the public...