option classless-static-routes code 121 = array of unsigned integer 8;

send dhcp-client-identifier = hardware;

request subnet-mask, broadcast-address, time-offset, routers,
        domain-name, domain-name-servers, domain-search, host-name,
        root-path, interface-mtu, classless-static-routes,
        netbios-name-servers, netbios-scope, ntp-servers,
        dhcp6.domain-search, dhcp6.fqdn,
        dhcp6.name-servers, dhcp6.sntp-servers;