in /etc/dhcpcd.conf bei debian stretch
interface eth0 static ip_address=192.168.0.10/24 static ip6_address=fd51:42f8:caae:d92e::ff/64 static routers=192.168.0.1 static domain_name_servers=192.168.0.1 8.8.8.8 static domain_search=meine.private.domain.tld
einfügen und rebooten.