sa16.ok revision 1.1 
1esp tunnel from 3ffe::1 to 3ffe::2 spi 0xdeadbeef auth hmac-sha1 enc aes
2	authkey 0xaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
3	enckey 0xeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
4esp tunnel from 3ffe::2 to 3ffe::1 spi 0xbeefdead auth hmac-sha1 enc aes
5	authkey 0xaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
6	enckey 0xeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
7