[ipv6-wg@localhost] Re: [dns-wg] IPv6 in .ie

[Daniel Karrenberg <]

On 07.09 08:49, Andreas S. Kerber wrote:
> 
> uuh, I guess that would get pretty close to 512 bytes when querying ie.

So what?  See below for examples of what could happen: 
soem glue is omitted.

If the client supports IPv6 it almost certainly supports EDNS(0), so the 
512 byte limit is no issue. 

If the lient does not support EDNS some glue may be dropped for 
very long names without problems. 

See http://www.nlnetlabs.nl/ipv6/publications/v6rootglue.pdf for
a little more detail.

(It can be argued that dropping AAAA glue first 
is a good tactic here because "see above". This will be implemented
on all root name servers in the near future.)


Daniel

-----

; <<>> DiG 8.2 <<>> @k.root-servers.net. short.ie. 
; (1 server found)
;; res options: init recurs defnam dnsrch
;; got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 6
;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 10, ADDITIONAL: 12
;; QUERY SECTION:
;;      short.ie, type = A, class = IN

;; AUTHORITY SECTION:
ie.                     2D IN NS        ns2.nic.fr.
ie.                     2D IN NS        ns.ripe.net.
ie.                     2D IN NS        banba.domainregistry.ie.
ie.                     2D IN NS        uucp-gw-1.pa.dec.com.
ie.                     2D IN NS        uucp-gw-2.pa.dec.com.
ie.                     2D IN NS        ns3.ns.esat.net.
ie.                     2D IN NS        gns1.domainregistry.ie.
ie.                     2D IN NS        gns2.domainregistry.ie.
ie.                     2D IN NS        ice.netsource.ie.
ie.                     2D IN NS        ns6.iedr.ie.

;; ADDITIONAL SECTION:
ns2.nic.fr.             2D IN A         192.93.0.4
ns.ripe.net.            2D IN A         193.0.0.193
banba.domainregistry.ie.  2D IN A  193.1.142.2
uucp-gw-1.pa.dec.com.   2D IN A         204.123.2.18
uucp-gw-2.pa.dec.com.   2D IN A         204.123.2.19
ns3.ns.esat.net.        2D IN A         192.111.39.100
ns3.ns.esat.net.        2D IN AAAA      2001:7c8:2:a::64
gns1.domainregistry.ie.  2D IN A  198.133.199.102
gns2.domainregistry.ie.  2D IN A  198.133.199.103
ice.netsource.ie.       2D IN A         212.17.32.2
ns6.iedr.ie.            2D IN A         213.190.149.221
ns6.iedr.ie.            2D IN AAAA      2001:bb0:ccc3::2

;; Total query time: 71 msec
;; FROM: dienst.karrenberg.net to SERVER: k.root-servers.net.  193.0.14.129
;; WHEN: Tue Sep  7 11:29:37 2004
;; MSG SIZE  sent: 26  rcvd: 499

; <<>> DiG 8.2 <<>> @k.root-servers.net. something.verylogindeed.fordemopurposes.ie 
; (1 server found)
;; res options: init recurs defnam dnsrch
;; got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 6
;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 10, ADDITIONAL: 11
;; QUERY SECTION:
;;      something.verylogindeed.fordemopurposes.ie, type = A, class = IN

;; AUTHORITY SECTION:
ie.                     2D IN NS        ns2.nic.fr.
ie.                     2D IN NS        ns.ripe.net.
ie.                     2D IN NS        banba.domainregistry.ie.
ie.                     2D IN NS        uucp-gw-1.pa.dec.com.
ie.                     2D IN NS        uucp-gw-2.pa.dec.com.
ie.                     2D IN NS        ns3.ns.esat.net.
ie.                     2D IN NS        gns1.domainregistry.ie.
ie.                     2D IN NS        gns2.domainregistry.ie.
ie.                     2D IN NS        ice.netsource.ie.
ie.                     2D IN NS        ns6.iedr.ie.

;; ADDITIONAL SECTION:
ns2.nic.fr.             2D IN A         192.93.0.4
ns.ripe.net.            2D IN A         193.0.0.193
banba.domainregistry.ie.  2D IN A  193.1.142.2
uucp-gw-1.pa.dec.com.   2D IN A         204.123.2.18
uucp-gw-2.pa.dec.com.   2D IN A         204.123.2.19
ns3.ns.esat.net.        2D IN A         192.111.39.100
ns3.ns.esat.net.        2D IN AAAA      2001:7c8:2:a::64
gns1.domainregistry.ie.  2D IN A  198.133.199.102
gns2.domainregistry.ie.  2D IN A  198.133.199.103
ice.netsource.ie.       2D IN A         212.17.32.2
ns6.iedr.ie.            2D IN A         213.190.149.221

;; Total query time: 69 msec
;; FROM: dienst.karrenberg.net to SERVER: k.root-servers.net.  193.0.14.129
;; WHEN: Tue Sep  7 11:29:43 2004
;; MSG SIZE  sent: 60  rcvd: 505


; <<>> DiG 8.2 <<>> @k.root-servers.net. something.verylogindeed.fordemopurposes.evenlonger.toforceommittingmoreglue.ie 
; (1 server found)
;; res options: init recurs defnam dnsrch
;; got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 6
;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 10, ADDITIONAL: 9
;; QUERY SECTION:
;;      something.verylogindeed.fordemopurposes.evenlonger.toforceommittingmoreglue.ie, type = A, class = IN

;; AUTHORITY SECTION:
ie.                     2D IN NS        ns2.nic.fr.
ie.                     2D IN NS        ns.ripe.net.
ie.                     2D IN NS        banba.domainregistry.ie.
ie.                     2D IN NS        uucp-gw-1.pa.dec.com.
ie.                     2D IN NS        uucp-gw-2.pa.dec.com.
ie.                     2D IN NS        ns3.ns.esat.net.
ie.                     2D IN NS        gns1.domainregistry.ie.
ie.                     2D IN NS        gns2.domainregistry.ie.
ie.                     2D IN NS        ice.netsource.ie.
ie.                     2D IN NS        ns6.iedr.ie.

;; ADDITIONAL SECTION:
ns2.nic.fr.             2D IN A         192.93.0.4
ns.ripe.net.            2D IN A         193.0.0.193
banba.domainregistry.ie.  2D IN A  193.1.142.2
uucp-gw-1.pa.dec.com.   2D IN A         204.123.2.18
uucp-gw-2.pa.dec.com.   2D IN A         204.123.2.19
ns3.ns.esat.net.        2D IN A         192.111.39.100
ns3.ns.esat.net.        2D IN AAAA      2001:7c8:2:a::64
gns1.domainregistry.ie.  2D IN A  198.133.199.102
gns2.domainregistry.ie.  2D IN A  198.133.199.103

;; Total query time: 67 msec
;; FROM: dienst.karrenberg.net to SERVER: k.root-servers.net.  193.0.14.129
;; WHEN: Tue Sep  7 11:33:53 2004
;; MSG SIZE  sent: 96  rcvd: 509