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Re: Geographic map of IPv6 availability

  • From: Peter Dambier
  • Date: Sat Oct 06 08:33:36 2007

Have a look at IO

~> dig -t any IO @a.nic.IO.
;; Truncated, retrying in TCP mode.

; <<>> DiG 9.4.0b4 <<>> -t any IO @a.nic.IO.
; (1 server found)
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 63841
;; flags: qr aa rd; QUERY: 1, ANSWER: 16, AUTHORITY: 0, ADDITIONAL: 7

;; QUESTION SECTION:
;IO.                            IN      ANY

;; ANSWER SECTION:
IO.                     604800  IN      SOA     ns.nic.IO. nicadmin.nic.IO. 2007100602 43200 3600 3600000 86400
IO.                     604800  IN      NS      b.nic.ac.
IO.                     604800  IN      NS      b.nic.IO.
IO.                     604800  IN      NS      b.ns13.net.
IO.                     604800  IN      NS      ns1.communitydns.net.
IO.                     604800  IN      NS      ns3.icb.co.uk.
IO.                     604800  IN      NS      a.nic.IO.
IO.                     604800  IN      NS      a.ns13.net.

;; ADDITIONAL SECTION:
a.nic.IO.               3600    IN      A       64.251.31.179
b.nic.ac.               3600    IN      A       217.160.203.158
b.nic.IO.               3600    IN      A       66.235.201.216
ns1.communitydns.net.   3600    IN      A       194.0.1.1
ns3.icb.co.uk.          3600    IN      A       217.199.188.61
ns3.icb.co.uk.          3600    IN      AAAA    2001:628:453:430c:230:48ff:fe42:60f

;; Query time: 231 msec
;; SERVER: 64.251.31.179#53(64.251.31.179)
;; WHEN: Sat Oct  6 14:19:41 2007
;; MSG SIZE  rcvd: 884

(sorry I had to clip a bit)

Now look at the root-servers:


; <<>> DiG 9.4.0b4 <<>> -t any IO @a.root-servers.net
; (1 server found)
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 31250
;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 8, ADDITIONAL: 8
;; WARNING: recursion requested but not available

;; QUESTION SECTION:
;IO.                            IN      ANY

;; AUTHORITY SECTION:
IO.                     172800  IN      NS      B.NS13.NET.
IO.                     172800  IN      NS      NS1.COMMUNITYDNS.NET.
IO.                     172800  IN      NS      NS3.ICB.CO.UK.
IO.                     172800  IN      NS      A.NIC.IO.
IO.                     172800  IN      NS      A.NS13.NET.
IO.                     172800  IN      NS      B.NIC.AC.
IO.                     172800  IN      NS      B.NIC.IO.
IO.                     172800  IN      NS      B.NIC.SH.

;; ADDITIONAL SECTION:
A.NIC.IO.               172800  IN      A       64.251.31.179
A.NS13.NET.             172800  IN      A       202.181.97.168
B.NIC.AC.               172800  IN      A       217.160.203.158
B.NIC.IO.               172800  IN      A       66.235.201.216
B.NIC.SH.               172800  IN      A       216.117.156.206
B.NS13.NET.             172800  IN      A       202.181.96.60
NS1.COMMUNITYDNS.NET.   172800  IN      A       194.0.1.1
NS3.ICB.CO.UK.          172800  IN      A       217.199.188.61

;; Query time: 144 msec
;; SERVER: 198.41.0.4#53(198.41.0.4)
;; WHEN: Sat Oct  6 14:23:27 2007
;; MSG SIZE  rcvd: 326


The IPv6 is gone.


On my own boxes I had problems to reach sites that had both
IPv6 and IPv4 addresses for one and the same server until
I unplucked the IPv6 stack.

My problem was there were nonconnected IPv6 islands that
could not see each other.


Kevin Loch wrote:

Nathan Ward wrote:


On 6/10/2007, at 3:18 AM, Stephen Wilcox wrote:

<stuff>
Given the above, I think there is no myth.. !


That's because the 'v6 network' is broken enough that putting AAAA records on sites that need to be well reachable is a bad idea.

For example, due mainly to Vista's 6to4 tunnelling stuff (based on researching a random sample of users), I'd lose about 4% of visitors to my web-sites if I were to turn on AAAA records. 


Has anyone who was using AAAA records for a site turned them off due to
reachability problems?

- Kevin 


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Peter and Karin Dambier
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