Listing 1. Example dhcpd.conf File to Support PXE Clients

option space PXE;
option PXE.mtftp-ip
  code 1 = ip-address;
option PXE.mtftp-cport
  code 2 = unsigned integer 16;
option PXE.mtftp-sport
  code 3 = unsigned integer 16;
option PXE.mtftp-tmout
  code 4 = unsigned integer 8;
option PXE.mtftp-delay
  code 5 = unsigned integer 8;
option PXE.discovery-control
  code 6 = unsigned integer 8;
option PXE.discovery-mcast-addr
  code 7 = ip-address;

subnet 192.168.1.0 netmask 255.255.255.0 {

  class "pxeclients" {
    match if substring (option
      vendor-class-identifier, 0, 9) = "PXEClient";
    option vendor-class-identifier "PXEClient";
    vendor-option-space PXE;

    # At least one of the vendor-specific PXE
    # options must be set in order for the client
    # boot ROMs to realize that this is a PXE-
    # complaint server. We set the MCAST IP address
    # to 0.0.0.0 to tell the boot ROM that we can't
    # provide multicast TFTP.

    option PXE.mtftp-ip 0.0.0.0;

    # This is the name of the file the boot ROMs
    # should download.
    filename "pxelinux.0";
    # This is the name of the server they should
    # get it from.
    next-server 192.168.1.1;
  }

  pool {
    max-lease-time 86400;
    default-lease-time 86400;
    range 192.168.1.2 192.168.1.254;

   # If you include this, you must provide host
   # entries for every client, optionally associating
   # ethernet MAC addresses with IP addresses.

   # deny unknown clients;
  }
}