6.7

Table Of Contents
ESXi is distributed in an ISO format that is designed to install to flash memory or to a local hard drive. You
can extract the files and boot by using PXE.
PXE uses Dynamic Host Configuration Protocol (DHCP) and Trivial File Transfer Protocol (TFTP) to boot
an operating system over a network.
PXE booting requires some network infrastructure and a machine with a PXE-capable network adapter.
Most machines that can run ESXi have network adapters that can PXE boot.
Note PXE booting with legacy BIOS firmware is possible only over IPv4. PXE booting with UEFI
firmware is possible with either IPv4 or IPv6.
Overview of the PXE Boot Installation Process
Some of the details of the PXE boot process vary depending on whether the target host is using legacy
BIOS or UEFI firmware, and whether the boot process uses TFTP only or TFTP plus HTTP.
When you boot the target host, it interacts with the different servers in the environment to get the network
adapter, boot loader, kernel, IP address for the kernel, and finally the installation script. When all
components are in place, installation starts, as shown in the following illustration.
VMware ESXi Installation and Setup
VMware, Inc. 90