This document explains how to configure the network of an ESX server 3.5, via a virtual switch, which is to create virtual networks, to connect virtual machines to each other, or that they are routed, or for HA use or administration . It is assumed that a host supports at most 4 NICs, In my case it will be a server with two network connections. The ideal is to have everything redundant, in case one interface goes down, the other has the same connections, or else, to split traffic and have VM traffic go through a NIC (x example). We have three types of connections to set up: