ccTLD/au/netについて、ここに記述してください。
$ dnsq ns net.au a.au
2 net.au: 264 bytes, 1+0+4+8 records, response, noerror query: 2 net.au authority: net.au 86400 NS x.au authority: net.au 86400 NS w.au authority: net.au 86400 NS z.au authority: net.au 86400 NS y.au additional: w.au 86400 A 37.209.192.5 additional: w.au 86400 AAAA 2001:dcd:1::5 additional: x.au 86400 A 37.209.194.5 additional: x.au 86400 AAAA 2001:dcd:2::5 additional: y.au 86400 A 37.209.196.5 additional: y.au 86400 AAAA 2001:dcd:3::5 additional: z.au 86400 A 37.209.198.5 additional: z.au 86400 AAAA 2001:dcd:4::5
ここのadditionalはglueではないので、 別途x.auなどのAを求める必要がある。
慎重なリゾルバーであれば、auのNSを得たときにglueではなくて、Aレコードを求めているはず。
$ dnsq ns aridns.net.au x.au
2 aridns.net.au: 302 bytes, 1+0+4+8 records, response, noerror query: 2 aridns.net.au authority: aridns.net.au 14400 NS ari.beta.aridns.net.au authority: aridns.net.au 14400 NS ari.alpha.aridns.net.au authority: aridns.net.au 14400 NS ari.gamma.aridns.net.au authority: aridns.net.au 14400 NS ari.delta.aridns.net.au additional: ari.beta.aridns.net.au 14400 A 37.209.194.2 additional: ari.beta.aridns.net.au 14400 AAAA 2001:dcd:2::2 additional: ari.alpha.aridns.net.au 14400 A 37.209.192.2 additional: ari.alpha.aridns.net.au 14400 AAAA 2001:dcd:1::2 additional: ari.delta.aridns.net.au 14400 A 37.209.198.2 additional: ari.delta.aridns.net.au 14400 AAAA 2001:dcd:4::2 additional: ari.gamma.aridns.net.au 14400 A 37.209.196.2 additional: ari.gamma.aridns.net.au 14400 AAAA 2001:dcd:3::2
$ dnsq ns beta.aridns.net.au ari.beta.aridns.net.au
2 beta.aridns.net.au: 105 bytes, 1+0+1+0 records, response, authoritative, noerror query: 2 beta.aridns.net.au authority: aridns.net.au 900 SOA ari.alpha.aridns.net.au support.ariservices.com 1413306155 1800 300 1814400 1800