DHCP option domain name server - Server Fault
https://serverfault.com/questions/78092004.06.2016 · option domain-name-servers ip-address [, ip-address... ]; The domain-name-servers option specifies a list of Domain Name System (STD 13, RFC 1035) name servers available to the client. Servers should be listed in order of preference. 3)In some connection, I could find the client connecting to second or third (8.8.8.8 or 8.8.4.4) server IPs.