1$TTL 5
2@ 	IN	SOA	ns1 hostmaster 1 3600 1200 3600000 3600
3@	IN	NS	ns1
4ns1	IN	A	10.0.0.1
5sub 	IN	SOA	ns2 hostmaster 1 3600 1200 3600000 3600
6ns2	IN	A	10.0.0.2
7