Max Ardica, Senior Technical Product Manager at VMware, wrote the first version of the VMware NSX for Multi-Hypervisor Reference Architecture and Network Virtualization Design Guide.
This document is targeted toward virtualization and network architects interested in deploying the VMware NSX Network virtualization solution in a multi-hypervisor environment.
The PDF has 91 pages with a lot of detailed technical information on NSX. Components are explained, VXLAN is explained, firewall, load balancing, design considerations, and much much more.
The design guide has many illustrations to explain NSX.
Recommended download and read if you want to know more about NSX.
A final version of this Reference Guide will be posted on the NSX Technical Resources website after VMworld 2014:
The guide can be downloaded here.