== ルートゾーンKSK/日本では/dns-oarc.net ==
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-----

<<TableOfContents()>>

https://www.dns-oarc.net/oarc/services/replysizetest
{{{
$ dig +short rs.dns-oarc.net txt
}}}
  が最初の例だが、これでは多分分からないだろう。

[[/段階的検査]]

手元での結果
{{{
rst.x487.rs.dns-oarc.net.
rst.x461.x487.rs.dns-oarc.net.
rst.x466.x461.x487.rs.dns-oarc.net.
"39.110.135.12 sent EDNS buffer size 512"
"39.110.135.12 DNS reply size limit is at least 487"
"Tested at 2017-08-08 02:12:41 UTC"
}}}

== TCPなら ==
$ dig +tcp rs.dns-oarc.net txt
{{{
; <<>> DiG 9.11.1-P3 <<>> +tcp rs.dns-oarc.net txt
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 59776
;; flags: qr rd ra; QUERY: 1, ANSWER: 6, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;rs.dns-oarc.net.		IN	TXT

;; ANSWER SECTION:
rs.dns-oarc.net.	60	IN	CNAME	rst.x4048.rs.dns-oarc.net.
rst.x4048.rs.dns-oarc.net. 59	IN	CNAME	rst.x4058.x4048.rs.dns-oarc.net.
rst.x4058.x4048.rs.dns-oarc.net. 58 IN	CNAME	rst.x4064.x4058.x4048.rs.dns-oarc.net.
rst.x4064.x4058.x4048.rs.dns-oarc.net. 57 IN TXT "Tested at 2017-08-08 02:14:12 UTC"
rst.x4064.x4058.x4048.rs.dns-oarc.net. 57 IN TXT "39.110.135.12 sent EDNS buffer size 4096"
rst.x4064.x4058.x4048.rs.dns-oarc.net. 57 IN TXT "39.110.135.12 DNS reply size limit is at least 4064"

;; Query time: 2349 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Tue Aug 08 11:14:12 JST 2017
;; MSG SIZE  rcvd: 279
}}}


----

直接問い合わせたときの返事だが、これをresolverがどう処理するかも問題だ。
　edns0 4096


== リゾルバー ==
{{{
 dig +bufsize=4096 rs.dns-oarc.net txt
}}}
　[[/kresd-4096]]  [[/bind-4096]] [[/unbound-4096]]
[[/8.8.8.8]]
== おかしい ==
[[/rst.x4090.rs.dns-oarc.net]] がおかしい。-- ToshinoriMaeno <<DateTime(2017-07-25T22:56:32+0900)>>

default install のはずだが、結果は見てのお楽しみ。-- ToshinoriMaeno <<DateTime(2017-07-25T19:58:04+0900)>>

== 問い合わせ ==

$ dig -t txt rs.dns-oarc.net @ns00.rs.dns-oarc.net
{{{
; <<>> DiG 9.11.1 <<>> -t txt rs.dns-oarc.net @ns00.rs.dns-oarc.net
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 63078
;; flags: qr aa; QUERY: 1, ANSWER: 1, AUTHORITY: 106, ADDITIONAL: 107

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;rs.dns-oarc.net.		IN	TXT

;; ANSWER SECTION:
rs.dns-oarc.net.	60	IN	CNAME	rst.x4090.rs.dns-oarc.net.

;; AUTHORITY SECTION:
x4090.rs.dns-oarc.net.	60	IN	NS	ns00.x4090.rs.dns-oarc.net.
x4090.rs.dns-oarc.net.	60	IN	NS	ns01.x4090.rs.dns-oarc.net.
x4090.rs.dns-oarc.net.	60	IN	NS	ns02.x4090.rs.dns-oarc.net.
...
x4090.rs.dns-oarc.net.	60	IN	NS	ns103.x4090.rs.dns-oarc.net.
x4090.rs.dns-oarc.net.	60	IN	NS	ns104.x4090.rs.dns-oarc.net.
x4090.rs.dns-oarc.net.	60	IN	NS	ns105.x4090.rs.dns-oarc.net.

;; ADDITIONAL SECTION:
ns00.x4090.rs.dns-oarc.net. 60	IN	A	64.191.0.134
ns01.x4090.rs.dns-oarc.net. 60	IN	A	64.191.0.134
ns02.x4090.rs.dns-oarc.net. 60	IN	A	64.191.0.134
...
ns103.x4090.rs.dns-oarc.net. 60	IN	A	64.191.0.134
ns104.x4090.rs.dns-oarc.net. 60	IN	A	64.191.0.134
ns105.x4090.rs.dns-oarc.net. 60	IN	A	64.191.0.134

;; Query time: 180 msec
;; SERVER: 64.191.0.133#53(64.191.0.133)
;; WHEN: Tue Jul 25 19:26:43 JST 2017
;; MSG SIZE  rcvd: 4090

}}}