$ORIGIN . $TTL 604800 ; 1 week sio1lab.lan IN SOA deb-dns1-ge.sio1lab.lan. root.sio1lab.lan. ( 2635478965 ; serial 21600 ; refresh (6 hours) 3600 ; retry (1 hour) 2419200 ; expire (4 weeks) 86400 ; minimum (1 day) ) NS deb-dns1-ge.sio1lab.lan. NS deb-dns2-ge.sio1lab.lan. A 192.168.0.120 A 192.168.0.121 $ORIGIN sio1lab.lan. deb-dhcp-ge A 192.168.0.120 deb-dns1-ge A 192.168.0.121 deb-dns2-ge A 192.168.0.122 dhcp CNAME deb-dhcp-ge dns1 CNAME deb-dns1-ge dns2 CNAME deb-dns2-ge