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
--
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