subnet 10.20.40.0 netmask 255.255.255.0 {
        option subnet-mask 255.255.255.0;
        option routers 10.20.40.1;
        option domain-name "event-north.tg15.gathering.org";
        ddns-domainname "event-north.tg15.gathering.org";
        range 10.20.40.4 10.20.40.254;
}