kresd/issues/com/2について、ここに記述してください。

cachectl.clear()
true
{{{
> [plan] plan 'com.' type 'NS'
[resl]   => using root hints
[resl]   => querying: '202.12.27.33' score: 10 zone cut: '.' m12n: 'com.' type: 'NS'
[resl]      optional: '199.7.83.42' score: 10 zone cut: '.' m12n: 'com.' type: 'NS'
[resl]      optional: '193.0.14.129' score: 10 zone cut: '.' m12n: 'com.' type: 'NS'
[resl]      optional: '192.58.128.30' score: 10 zone cut: '.' m12n: 'com.' type: 'NS'
[iter]   update_cut
[iter]   update_cut
[iter]   update_cut
[iter]   update_cut
[iter]   update_cut
[iter]   update_cut
[iter]   update_cut
[iter]   update_cut
[iter]   update_cut
[iter]   update_cut
[iter]   update_cut
[iter]   update_cut
[iter]   update_cut
[iter]   <= referral response, follow
[resl]   <= server: '202.12.27.33' rtt: 6 ms


[plan]   plan 'm.gtld-servers.net.' type 'AAAA'
[resl]     => using root hints
[resl]     => querying: '199.7.83.42' score: 10 zone cut: '.' m12n: 'nET.' type: 'NS'
[resl]        optional: '193.0.14.129' score: 10 zone cut: '.' m12n: 'nET.' type: 'NS'
[resl]        optional: '192.58.128.30' score: 10 zone cut: '.' m12n: 'nET.' type: 'NS'
[resl]        optional: '192.36.148.17' score: 10 zone cut: '.' m12n: 'nET.' type: 'NS'
[iter]     update_cut
[iter]     fetching glue for cut net, 
a  gtld-serversnet
[iter]     update_cut 
           ...
[iter]     update_cut
[iter]     fetching glue for cut net, 
l  gtld-serversnet
[iter]     update_cut
[iter]     fetching glue for cut net, 
m  gtld-serversnet
[iter]     <= referral response, follow
[resl]     <= server: '199.7.83.42' rtt: 152 ms

[resl]     => querying: '192.55.83.30' score: 10 zone cut: 'net.' m12n: 'gTld-SErvErs.nEt.' type: 'NS'
[resl]        optional: '192.41.162.30' score: 10 zone cut: 'net.' m12n: 'gTld-SErvErs.nEt.' type: 'NS'
[resl]        optional: '192.52.178.30' score: 10 zone cut: 'net.' m12n: 'gTld-SErvErs.nEt.' type: 'NS'
[resl]        optional: '192.48.79.30' score: 10 zone cut: 'net.' m12n: 'gTld-SErvErs.nEt.' type: 'NS'
[iter]     update_cut
[iter]     update_cut
[iter]     update_cut
[iter]     update_cut
[iter]     <= referral response, follow
[resl]     <= server: '192.55.83.30' rtt: 82 ms
}}}

gtld-servers.net
{{{
;; ANSWER SECTION:
gtld-servers.net.	86266	IN	NS	av4.nstld.com.
gtld-servers.net.	86266	IN	NS	av3.nstld.com.
gtld-servers.net.	86266	IN	NS	av1.nstld.com.
gtld-servers.net.	86266	IN	NS	av2.nstld.com.
}}}

問題はここでのcomへの問い合わせに192.41.162.30を使うのはまずいということだ。???
  com NS は分かっている。そのAレコードをどこから得たのか。
　　net NS のglueから取り出している以外にはありそうもない。
-- ToshinoriMaeno <<DateTime(2016-04-17T09:20:15+0900)>>

https://twitter.com/beyondDNS/status/721495974573551618?lang=ja
　root-serversにnetを問い合わせたときに返るglue (a.gtld-servers.net  Ａ など）を
　どう扱っているか、調べてみます。

{{{
[plan]     plan 'av4.nstld.com.' type 'AAAA'
[resl]       => querying: '192.41.162.30' score: 10 zone cut: 'com.' m12n: 'nStld.com.' type: 'NS'
[resl]          optional: '192.52.178.30' score: 10 zone cut: 'com.' m12n: 'nStld.com.' type: 'NS'
[resl]          optional: '192.48.79.30' score: 10 zone cut: 'com.' m12n: 'nStld.com.' type: 'NS'
[resl]          optional: '192.43.172.30' score: 10 zone cut: 'com.' m12n: 'nStld.com.' type: 'NS'
[iter]       update_cut
[iter]       fetching glue for cut nstldcom, av1nstldcom
[iter]       update_cut
[iter]       fetching glue for cut nstldcom, av2nstldcom
[iter]       update_cut
[iter]       fetching glue for cut nstldcom, av3nstldcom
[iter]       update_cut
[iter]       fetching glue for cut nstldcom, av4nstldcom
[iter]       <= referral response, follow
[resl]       <= server: '192.41.162.30' rtt: 141 ms


[resl]       => querying: '192.82.134.30' score: 10 zone cut: 'nstld.com.' m12n: 'av4.nStlD.Com.' type: 'AAAA'
[resl]          optional: '192.82.133.30' score: 10 zone cut: 'nstld.com.' m12n: 'av4.nStlD.Com.' type: 'AAAA'
[resl]          optional: '192.42.178.30' score: 10 zone cut: 'nstld.com.' m12n: 'av4.nStlD.Com.' type: 'AAAA'
[resl]          optional: '192.42.177.30' score: 10 zone cut: 'nstld.com.' m12n: 'av4.nStlD.Com.' type: 'AAAA'
[iter]       <= rcode: NOERROR
[resl]       <= server: '192.82.134.30' rtt: 6 ms
[plan]     plan 'av4.nstld.com.' type 'A'
[ rc ]       => satisfied from cache
[iter]       <= rcode: NOERROR
[resl]     => querying: '192.82.134.30' score: 11 zone cut: 'gtld-servers.net.' m12n: 'm.GTLD-serveRs.Net.' type: 'AAAA'
[iter]     <= rcode: NOERROR
[ pc ]     => answer cached for TTL=900
[resl]     <= server: '192.82.134.30' rtt: 6 ms
[ rc ]   => satisfied from cache
[iter]   <= rcode: NOERROR
[resl] finished: 4, queries: 4, mempool: 32800 B
}}}