Deve ser tão simples quanto fazer algo assim.
host windows-matt-2 {
option domain-name-servers 1.2.3.4;
option domain-name "foo";
option routers 5.6.7.8;
option broadcast-address 10.100.255.255;
default-lease-time 600;
max-lease-time 7200;
hardware ethernet 00:1f:d0:a1:55:5d;
fixed-address 10.100.101.21;
}
subnet 10.100.0.0 netmask 255.255.0.0 {
range 10.100.201.1 10.100.201.254;
option domain-name-servers 10.100.1.1;
option domain-name "lundfam.local";
option routers 10.100.1.1;
option broadcast-address 10.100.255.255;
default-lease-time 600;
max-lease-time 7200;
}