$ORIGIN . $TTL 604800 ; 1 week sio1lab.lan IN SOA deb-dns1-al.sio1lab.lan. root.sio1lab.lan. ( 2 ; serial 604800 ; refresh (1 week) 86400 ; retry (1 day) 2419200 ; expire (4 weeks) 604800 ; minimum (1 week) ) NS deb-dns1-al.sio1lab.lan. A 172.0.0.1 $ORIGIN sio1lab.lan. deb-dhcp-al A 192.168.0.160 deb-dns1-al A 192.168.0.161 deb-dns2-al A 192.168.0.162 dhcp CNAME deb-dhcp-al dns1 CNAME deb-dns1-al dns2 CNAME deb-dns2-al