How to do it...

The following procedure would step through the process of configuring DHCP to enable PXE boot:

1. Log in to the server with the DHCP service enabled.
2. Run dhcpmgmt.msc.

1. Traverse to the scope created for the ESXi IP range intended for PXE boot.
2. Right click on Scope Options and click on Configure Options...  as shown in the following screenshot:
   
3. Set values for scope options 066 Boot Server Host Name to that of the TFTP server.
4. Set values for scope options 067 Bootfile Name to the PXE file undionly.kpxe.vmw-hardwired as demonstrated here: