DNS/実装/KnotDNSresolver/chikyuu.ac.jpについて、ここに記述してください。

%dnsq ns chikyu.ac.jp a.dns.jp

2 chikyu.ac.jp:
125 bytes, 1+0+3+2 records, response, noerror
query: 2 chikyu.ac.jp
authority: chikyu.ac.jp 86400 NS ns.chikyu.ac.jp
authority: chikyu.ac.jp 86400 NS sigw.sinet.ad.jp
authority: chikyu.ac.jp 86400 NS rpp.chikyu.ac.jp
additional: ns.chikyu.ac.jp 86400 A 202.209.7.34
additional: rpp.chikyu.ac.jp 86400 A 202.209.7.46

%dnsq ns chikyu.ac.jp ns.chikyu.ac.jp

2 chikyu.ac.jp:
97 bytes, 1+2+0+2 records, response, authoritative, noerror
query: 2 chikyu.ac.jp
answer: chikyu.ac.jp 86400 NS rpp.chikyu.ac.jp
answer: chikyu.ac.jp 86400 NS ns.chikyu.ac.jp
additional: ns.chikyu.ac.jp 86400 A 202.209.7.34
additional: rpp.chikyu.ac.jp 86400 A 202.209.7.46

1. Knot Resolver

$ dig -t ns chikyu.ac.jp @127.0.0.3

; <<>> DiG 9.9.5-3ubuntu0.5-Ubuntu <<>> -t ns chikyu.ac.jp @127.0.0.3
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 5661
;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1452
;; QUESTION SECTION:
;chikyu.ac.jp.                  IN      NS

;; ANSWER SECTION:
chikyu.ac.jp.           86399   IN      NS      ns.chikyu.ac.jp.
chikyu.ac.jp.           86399   IN      NS      rpp.chikyu.ac.jp.
chikyu.ac.jp.           86399   IN      NS      sigw.sinet.ad.jp.

;; Query time: 0 msec
;; SERVER: 127.0.0.3#53(127.0.0.3)
;; WHEN: Thu Oct 08 15:12:10 JST 2015
;; MSG SIZE  rcvd: 104

2. log

[plan] plan 'chikyu.ac.jp.' type 'NS'
[resl]   => querying: '2001:dc2::1' score: 10 zone cut: 'jp.' m12n: 'Ac.jp.' type: 'NS'
[resl]      optional: '202.12.30.131' score: 10 zone cut: 'jp.' m12n: 'Ac.jp.' type: 'NS'
[resl]   => NS unreachable, retrying over TCP
[resl]   => querying: '2001:dc2::1' score: 10 zone cut: 'jp.' m12n: 'Ac.jP.' type: 'NS'
[resl]      optional: '202.12.30.131' score: 10 zone cut: 'jp.' m12n: 'Ac.jP.' type: 'NS'
[resl]   => querying: '2001:200:c000::35' score: 10 zone cut: 'jp.' m12n: 'ac.jP.' type: 'NS'
[resl]      optional: '192.50.43.53' score: 10 zone cut: 'jp.' m12n: 'ac.jP.' type: 'NS'

[plan] plan 'chikyu.ac.jp.' type 'NS'
[resl]   => querying: '202.12.30.131' score: 10 zone cut: 'jp.' m12n: 'ac.Jp.' type: 'NS'
[iter]   <= rcode: NOERROR
[iter]   <= found cut, retrying with non-minimized name
[resl]   => querying: '2001:502:ad09::5' score: 10 zone cut: 'jp.' m12n: 'CHIkyU.Ac.jp.' type: 'NS'
[resl]      optional: '156.154.100.5' score: 10 zone cut: 'jp.' m12n: 'CHIkyU.Ac.jp.' type: 'NS'
[resl]   => NS unreachable, retrying over TCP
[resl]   => querying: '2001:200:c000::35' score: 10 zone cut: 'jp.' m12n: 'Ac.Jp.' type: 'NS'
[resl]      optional: '192.50.43.53' score: 10 zone cut: 'jp.' m12n: 'Ac.Jp.' type: 'NS'
[resl]   => querying: '2001:502:ad09::5' score: 10 zone cut: 'jp.' m12n: 'ac.Jp.' type: 'NS'
[resl]      optional: '156.154.100.5' score: 10 zone cut: 'jp.' m12n: 'ac.Jp.' type: 'NS'
[resl]   => NS unreachable, retrying over TCP
[resl]   => querying: '2001:502:ad09::5' score: 10 zone cut: 'jp.' m12n: 'chikYU.ac.jP.' type: 'NS'
[resl]      optional: '156.154.100.5' score: 10 zone cut: 'jp.' m12n: 'chikYU.ac.jP.' type: 'NS'
[resl]   => querying: '156.154.100.5' score: 10 zone cut: 'jp.' m12n: 'ChiKYU.Ac.Jp.' type: 'NS'
[iter]   <= referral response, follow
[resl]   => querying: '202.209.7.34' score: 10 zone cut: 'chikyu.ac.jp.' m12n: 'chikyU.Ac.jP.' type: 'NS'
[resl]   => NS unreachable, retrying over TCP
[resl]   => querying: '2001:502:ad09::5' score: 10 zone cut: 'jp.' m12n: 'ac.JP.' type: 'NS'
[resl]      optional: '156.154.100.5' score: 10 zone cut: 'jp.' m12n: 'ac.JP.' type: 'NS'
[resl]   => querying: '2001:240::53' score: 10 zone cut: 'jp.' m12n: 'aC.jP.' type: 'NS'
[resl]      optional: '210.138.175.244' score: 10 zone cut: 'jp.' m12n: 'aC.jP.' type: 'NS'

[plan] plan 'chikyu.ac.jp.' type 'NS'
[ rc ]   => satisfied from cache
[iter]   <= rcode: NOERROR
[resl] finished: 4, queries: 1, mempool: 16392 B
[resl]   => NS unreachable, retrying over TCP
[resl]   => querying: '202.209.7.34' score: 10 zone cut: 'chikyu.ac.jp.' m12n: 'cHIKYu.aC.JP.' type: 'NS'
[resl]   => NS unreachable, retrying over TCP
[resl]   => querying: '2001:240::53' score: 10 zone cut: 'jp.' m12n: 'ac.Jp.' type: 'NS'
[resl]      optional: '210.138.175.244' score: 10 zone cut: 'jp.' m12n: 'ac.Jp.' type: 'NS'
[resl]   => querying: '210.138.175.244' score: 10 zone cut: 'jp.' m12n: 'AC.Jp.' type: 'NS'
[iter]   <= rcode: NOERROR
[iter]   <= found cut, retrying with non-minimized name
[resl]   => querying: '192.50.43.53' score: 10 zone cut: 'jp.' m12n: 'cHIkYu.aC.jp.' type: 'NS'
[iter]   <= referral response, follow
[resl]   => querying: '202.209.7.34' score: 10 zone cut: 'chikyu.ac.jp.' m12n: 'chikyu.AC.JP.' type: 'NS'
[iter]   <= rcode: NOERROR
[resl] finished: 4, queries: 1, mempool: 16392 B
[resl]   => querying: '202.209.7.46' score: 10 zone cut: 'chikyu.ac.jp.' m12n: 'ChiKyu.AC.jp.' type: 'NS'
[iter]   <= rcode: NOERROR
[resl] finished: 4, queries: 1, mempool: 16392 B

返答をみると、sigw.sinet.ad.jp NSが残っている。なぜだろう。

-- ToshinoriMaeno 2015-10-08 06:21:14