$ORIGIN . $TTL 604800 ; 1 week sio-tc.lan IN SOA dns1-tc.sio-tc.lan. root.dns1-tc.sio-tc.lan. ( 2 ; serial 604800 ; refresh (1 week) 86400 ; retry (1 day) 2419200 ; expire (4 weeks) 604800 ; minimum (1 week) ) NS dns1-tc.sio-tc.lan. A 127.0.0.1 $ORIGIN sio-tc.lan. deb-dhcp-tc A 192.168.0.160 dhcp CNAME deb-dhcp-tc dns1 CNAME dns1-tc dns1-tc A 192.168.0.161 dns2 CNAME dns2-tc dns2-tc A 192.168.0.162