dhclient

# cat /etc/dhcp/dhclient.conf
send host-name "crits.ru";

timeout 30;

supersede dhcp-server-identifier 255.255.255.255;

option rfc3442-classless-static-routes code 121 = array of unsigned integer 8;
option ms-classless-static-routes code 249 = array of unsigned integer 8;
option static-routes code 33 = array of { ip-address, ip-address };

request subnet-mask, broadcast-address, time-offset, routers,
    domain-name, domain-name-servers, domain-search, host-name,
    netbios-name-servers, netbios-scope, interface-mtu,
    rfc3442-classless-static-routes, ntp-servers, static-routes,
    ms-classless-static-routes;