Estaremos usando isc-dhcp-server, busca como se llama en tu OS

Ya lo explicaré mas a profundidad, de mientras, esta configuración Funciona™ (además, no creo que haya mucho que explicar, realmente, si tienes claros los conceptos verás que son autodescriptivos)

dhcpd.conf

option rfc3442-classless-static-routes code 121 = array of integer 8;
#option definitions common to all supported networks...
option domain-name "suragu.net";
option domain-name-servers 192.168.1.207,  192.168.1.205;
default-lease-time 600;
max-lease-time 7200;
 
# Use this to enble / disable dynamic dns updates globally.
#ddns-update-style none;
 
# If this DHCP server is the official DHCP server for the local
# network, the authoritative directive should be uncommented.
authoritative;
 
# Use this to send dhcp log messages to a different log file (you also
# have to hack syslog.conf to complete the redirection).
 
# No service will be given on this subnet, but declaring it helps the
# DHCP server to understand the network topology.
option client-architecture code 93 = unsigned integer 16;
 
# Esto es una declaración de subred
 
subnet 192.168.1.0 netmask 255.255.255.0 {
  range 192.168.1.2 192.168.1.99;
  option routers 192.168.1.1;
  next-server 192.168.1.207;
  option root-path "192.168.1.207:/var/www/html/freebsd_boot";
 
  if exists user-class and option user-class = "iPXE" {
      filename "http://192.168.1.207/boot.ipxe";
  } elsif option client-architecture = 00:00 {
      filename "undionly.kpxe";
  } else {
      filename "ipxe.efi";
  }
 
}