/etc/dhclient.conf doesn't exist. These are the only uncommented lines in /etc/dhcp/dhclient.conf option rfc3442-classless-static-routes code 121 = array of unsigned integer 8; 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;