Listing 1 dhcpd.conf

option domain-name "example.com";
option domain-name-servers 192.168.254.19;
option routers 192.168.42.1;
max-lease-time 172800;
default-lease-time 172800;
option subnet-mask 255.255.255.0;
option broadcast-address 192.168.42.255;

ddns-update-style ad-hoc;

subnet 192.168.42.0 netmask 255.255.255.0 {
        range 192.168.42.200 192.168.42.253;
}

group{
         host krb5.example.com { hardware ethernet aa:16:3e:00:00:13; \
           fixed-address 192.168.42.19; option host-name \
           "krb5.example.com"; always-broadcast on;}
}