So... is it time to do IPv6 day monthy yet?

Jimmy Hess mysidia at gmail.com
Sun Jun 19 13:43:24 CDT 2011


On Sat, Jun 18, 2011 at 1:35 PM, Owen DeLong <owen at delong.com> wrote:
> This ignores the extra baggage that tends to come along in a DNS payload.
> Just the root:
.....
> Note, none of these came with glue. They ONLY included the name data.
> Had they come with glue, we would easily have been over 512 in both
> cases just for IPv4, let alone a v4/v6 combination.

None of those come with glue, ....really?
For the root zone,  I currently see a fully populated NS response with
a fair bit of glue that is 512 bytes total,  and a majority of that 512 bytes
response is the additional section. That is, with no glue, you would be
looking at approximately 200 octets.

In addition when I dig against 2001:dc3::35, the root server  responds
to  my  query
IN   with glue for all A through L  .root-servers,   and two pieces of
AAAA glue
 without exceeding 492 message size.

However, the root zone and gTLD zones are quite special, and a very significant
exception to the norm for number of NS entries authoritative for a zone.
Few domains have more than 3 NS.

;; MSG SIZE  rcvd: 512

# dig +norecurse -t NS . @198.41.0.4

; <<>> DiG 9.3.6-P1-RedHat-9.3.6-16.P1.el5 <<>> +norecurse -t NS . @198.41.0.4
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 46162
;; flags: qr aa; QUERY: 1, ANSWER: 13, AUTHORITY: 0, ADDITIONAL: 14

;; QUESTION SECTION:
;.				IN	NS

;; ANSWER SECTION:
.			518400	IN	NS	b.root-servers.net.
.			518400	IN	NS	e.root-servers.net.
.			518400	IN	NS	k.root-servers.net.
.			518400	IN	NS	m.root-servers.net.
.			518400	IN	NS	f.root-servers.net.
.			518400	IN	NS	c.root-servers.net.
.			518400	IN	NS	g.root-servers.net.
.			518400	IN	NS	j.root-servers.net.
.			518400	IN	NS	h.root-servers.net.
.			518400	IN	NS	d.root-servers.net.
.			518400	IN	NS	a.root-servers.net.
.			518400	IN	NS	i.root-servers.net.
.			518400	IN	NS	l.root-servers.net.

;; ADDITIONAL SECTION:
b.root-servers.net.	3600000	IN	A	192.228.79.201
e.root-servers.net.	3600000	IN	A	192.203.230.10
k.root-servers.net.	3600000	IN	A	193.0.14.129
k.root-servers.net.	3600000	IN	AAAA	2001:7fd::1
m.root-servers.net.	3600000	IN	A	202.12.27.33
m.root-servers.net.	3600000	IN	AAAA	2001:dc3::35
f.root-servers.net.	3600000	IN	A	192.5.5.241
f.root-servers.net.	3600000	IN	AAAA	2001:500:2f::f
c.root-servers.net.	3600000	IN	A	192.33.4.12
g.root-servers.net.	3600000	IN	A	192.112.36.4
j.root-servers.net.	3600000	IN	A	192.58.128.30
j.root-servers.net.	3600000	IN	AAAA	2001:503:c27::2:30
h.root-servers.net.	3600000	IN	A	128.63.2.53
h.root-servers.net.	3600000	IN	AAAA	2001:500:1::803f:235

;; Query time: 203 msec
;; SERVER: 198.41.0.4#53(198.41.0.4)
;; WHEN: Sun Jun 19 13:17:31 2011
;; MSG SIZE  rcvd: 512

# dig +norecurse -t NS . @2001:dc3::35

; <<>> DiG 9.3.6-P1-RedHat-9.3.6-16.P1.el5 <<>> +norecurse -t NS .
@m.root-servers.net
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 1931
;; flags: qr aa; QUERY: 1, ANSWER: 13, AUTHORITY: 0, ADDITIONAL: 15

;; QUESTION SECTION:
;.				IN	NS

;; ANSWER SECTION:
.			518400	IN	NS	c.root-servers.net.
.			518400	IN	NS	j.root-servers.net.
.			518400	IN	NS	h.root-servers.net.
.			518400	IN	NS	g.root-servers.net.
.			518400	IN	NS	b.root-servers.net.
.			518400	IN	NS	f.root-servers.net.
.			518400	IN	NS	l.root-servers.net.
.			518400	IN	NS	i.root-servers.net.
.			518400	IN	NS	m.root-servers.net.
.			518400	IN	NS	d.root-servers.net.
.			518400	IN	NS	k.root-servers.net.
.			518400	IN	NS	e.root-servers.net.
.			518400	IN	NS	a.root-servers.net.

;; ADDITIONAL SECTION:
a.root-servers.net.	3600000	IN	A	198.41.0.4
b.root-servers.net.	3600000	IN	A	192.228.79.201
c.root-servers.net.	3600000	IN	A	192.33.4.12
d.root-servers.net.	3600000	IN	A	128.8.10.90
e.root-servers.net.	3600000	IN	A	192.203.230.10
f.root-servers.net.	3600000	IN	A	192.5.5.241
g.root-servers.net.	3600000	IN	A	192.112.36.4
h.root-servers.net.	3600000	IN	A	128.63.2.53
i.root-servers.net.	3600000	IN	A	192.36.148.17
j.root-servers.net.	3600000	IN	A	192.58.128.30
k.root-servers.net.	3600000	IN	A	193.0.14.129
l.root-servers.net.	3600000	IN	A	199.7.83.42
m.root-servers.net.	3600000	IN	A	202.12.27.33
a.root-servers.net.	3600000	IN	AAAA	2001:503:ba3e::2:30
d.root-servers.net.	3600000	IN	AAAA	2001:500:2d::d

;; Query time: 88 msec
;; SERVER: 2001:dc3::35#53(2001:dc3::35)
;; WHEN: Sun Jun 19 13:35:41 2011
;; MSG SIZE  rcvd: 492





--
-JH




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