Is an IPv6-only glue/delegation record a problem in a world of IPv4?

Rick Dicaire kritek at gmail.com
Mon Jan 11 17:57:33 UTC 2010


On Mon, Jan 11, 2010 at 12:29 PM, Mathew J. Newton
<bind-users at newtonnet.co.uk> wrote:
> The same delegation records are present as glue in the .org nameservers.

While this is not in response to your original question, I am curious.
I'm not sure if you were part of the discussion we just had on IRC
freenode #ipv6, but querying a .org TLD NS for AAAA records for ns1
and ns2.v6ns.org return no actual AAAA records, no errors reported,
but there seem to be AAAA records shown in the ADDITIONAL section of
the query response.

If I understand this correctly, the lack of an ANSWER section for AAAA
query would denote there is no ipv6 glue at the TLD?

2001:500:e::1 being a0.org.afilias-nst.info, a .org TLD NS

; <<>> DiG 9.6.1-P2-RedHat-9.6.1-13.P2.fc12 <<>> aaaa ns1.v6ns.org
@2001:500:e::1
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 38080
;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 2, ADDITIONAL: 4
;; WARNING: recursion requested but not available

;; QUESTION SECTION:
;ns1.v6ns.org.                  IN      AAAA

;; AUTHORITY SECTION:
v6ns.org.               86400   IN      NS      ns1.v6ns.org.
v6ns.org.               86400   IN      NS      ns2.v6ns.org.

;; ADDITIONAL SECTION:
ns1.v6ns.org.           86400   IN      A       77.103.161.36
ns2.v6ns.org.           86400   IN      A       77.103.161.36
ns1.v6ns.org.           86400   IN      AAAA    2a01:348:133::a1
ns2.v6ns.org.           86400   IN      AAAA    2a01:348:6:a1::2

;; Query time: 102 msec
;; SERVER: 2001:500:e::1#53(2001:500:e::1)
;; WHEN: Mon Jan 11 12:44:13 2010
;; MSG SIZE  rcvd: 150

------------------------------------------------------------------------------------

; <<>> DiG 9.6.1-P2-RedHat-9.6.1-13.P2.fc12 <<>> aaaa ns2.v6ns.org
@2001:500:e::1
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 377
;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 2, ADDITIONAL: 4
;; WARNING: recursion requested but not available

;; QUESTION SECTION:
;ns2.v6ns.org.                  IN      AAAA

;; AUTHORITY SECTION:
v6ns.org.               86400   IN      NS      ns2.v6ns.org.
v6ns.org.               86400   IN      NS      ns1.v6ns.org.

;; ADDITIONAL SECTION:
ns2.v6ns.org.           86400   IN      AAAA    2a01:348:6:a1::2
ns2.v6ns.org.           86400   IN      A       77.103.161.36
ns1.v6ns.org.           86400   IN      A       77.103.161.36
ns1.v6ns.org.           86400   IN      AAAA    2a01:348:133::a1

;; Query time: 719 msec
;; SERVER: 2001:500:e::1#53(2001:500:e::1)
;; WHEN: Mon Jan 11 12:44:23 2010
;; MSG SIZE  rcvd: 150

An example showing glue in .com/.net:

; <<>> DiG 9.6.1-P2-RedHat-9.6.1-13.P2.fc12 <<>> aaaa ns2.he.net
@G.GTLD-SERVERS.net
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 25892
;; flags: qr rd; QUERY: 1, ANSWER: 1, AUTHORITY: 5, ADDITIONAL: 9
;; WARNING: recursion requested but not available

;; QUESTION SECTION:
;ns2.he.net.                    IN      AAAA

;; ANSWER SECTION:
ns2.he.net.             172800  IN      AAAA    2001:470:200::2

;; AUTHORITY SECTION:
he.net.                 172800  IN      NS      ns1.he.net.
he.net.                 172800  IN      NS      ns2.he.net.
he.net.                 172800  IN      NS      ns3.he.net.
he.net.                 172800  IN      NS      ns4.he.net.
he.net.                 172800  IN      NS      ns5.he.net.

;; ADDITIONAL SECTION:
ns1.he.net.             172800  IN      A       216.218.130.2
ns2.he.net.             172800  IN      A       216.218.131.2
ns2.he.net.             172800  IN      AAAA    2001:470:200::2
ns3.he.net.             172800  IN      A       216.218.132.2
ns3.he.net.             172800  IN      AAAA    2001:470:300::2
ns4.he.net.             172800  IN      A       216.66.1.2
ns4.he.net.             172800  IN      AAAA    2001:470:400::2
ns5.he.net.             172800  IN      A       216.66.80.18
ns5.he.net.             172800  IN      AAAA    2001:470:500::2

;; Query time: 100 msec
;; SERVER: 192.42.93.30#53(192.42.93.30)
;; WHEN: Mon Jan 11 12:54:02 2010
;; MSG SIZE  rcvd: 334


-- 
aRDy Music and Rick Dicaire present:
http://www.ardynet.com
http://www.ardynet.com:9000/ardymusic.ogg.m3u



More information about the bind-users mailing list