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IPv6 Test

ipv6test.google.com

55 pointsfranze32 comments

http://test-ipv6.com/ is much more detailed about how you might fail/be failing.

My iphone gets 10/10, 9/10 (I haven't fixed the DNS server to have IPv6 access yet).

The Google page fails to detect that I do in fact have IPv6 randomly some of the time...

Looks like I won't run into any problems. Has anyone failed the test yet?

I've tried it from three locations today (home on Clear wimax ISP, T-Mobile 3G, and a coffee shop) and haven't seen any ipv6 connectivity yet.

I've been reading about IPv6 over IPv4 tunnel brokers and I have a question.

Aren't they basically carrying all the data requested back back forth like an ISP over an (ipv4) ISP? So you are basically doubling the traffic needed? If so, how are there free tunnels, how do they make money? How is it even practical?

You only route your actual IPv6 traffic over the tunnel, so it is a small fraction of your traffic.

Not sure how they make money though...

Bandwidth is cheaper than consumers are made to believe. You can pay orders of magnitudes less for the same bandwidth depending on where your server is.

You could make money by switching ads (like cable companies do with public broadcasts) and by doing traffic analysis for market research.

The two big tunnel brokers are primarily run by network transit companies for whom bandwidth is less an issue and who benefit from more IPv6 traffic and the experience that managing and debugging it provides.

I suspect that tunneled traffic volumes will always be low enough not to significantly affect the bottom line, as anyone willing to maintain a manually configured tunnel will move to native IPv6 transit as soon as possible and higher volume production business needs will use native/load balancers/proxy servers instead of tunnels.

In the case of Hurricane Electric, I think this has also been a marketing/evangelism/thought leadership activity on their part. They're the experts I think of when I think about IPv6, largely because they've been doing this for a long time and they have clueful people working for them, in addition to the fact that they provide free tunnels.

To start with, there's no IPv6 for http://ipv6test.google.com/

Check this: http://paste.userlinux.net/62/

Edit: previous link shows that I have IPv6 connectivity and Google test page is wrong.

What Google seems to be testing is whether you will be able to connect to a site that is served by both IPv4 and IPv6 (i.e. A and AAAA DNS records).

I believe their message is incorrect. It should be "Your system is not using IPv6 connection by default OR you don't have it."

Also, the IPv6 is available on <random>.ds.ipv6test.google.com, which is what they use to check your conectivity.

The say "You don’t have IPv6, but you shouldn’t have problems on websites that add IPv6 support", and that's incorrect. I have an IPv6 address, I have full IPv6 connectivity and actually I have IPv6 prioritized over IPv4.

Honestly, I don't see how are they testing if I have an IPv6 address when their web it's not accessible using IPv6. I can be wrong, though :)

Edit: OK, point for you. Although the system tries IPv6 first, may be Firefox is using IPv4 for that page because there's no IPv6 on ipv6test.google.com.

But I still think it's wrong because they're doing false negatives.

I get "Yes, looks like you’re using IPv6 already. Welcome to the future of the Internet!"

I think they are detecting via Ajax to an ipv6 only domain so the test page does not need ipv6.

So it must be misdetecting you. It was being intermittent for me earlier...

ok, so this is a dumb question, but if i see:

  # ping6 ::1 
  PING ::1(::1) 56 data bytes
  64 bytes from ::1: icmp_seq=1 ttl=64 time=0.054 ms
  ...
  # ping6 2a00:1450:8002::6a
  connect: Network is unreachable

does that mean that my isp isn't supporting ipv6? as far as i can tell, my system is configured to do so (i am worried about the "pure ipv6" part, not ipv4+6, which is fine).

[edit: updated with an ipv6 address from http://www.cyberciti.biz/faq/howto-test-ipv6-network-with-pi...] [edit2: updated again with google address from below]

Probably, although it is possible your ISP has support but you havent got a route set. What does route -n -6 say? The default route is 2000::/3 in ipv6.

route -n --inet6 doesn't have anything for that, only for fe80 and ff00.

Then you don't have IPv6. Hassle your ISP and/or install a tunnel.

yeah, thanks. i just applied for a tunnel.

assuming by ping6 2001:0db8:200:f101::1 you mean ping6 to a real IPv6 address rather than the 2001:db8::/32 demonstration address, then yes, you probably have a link local IPv6 address only. You can also check by running ifconfig (or the similar utility for your OS) and looking for a globally routable IPv6 addresses on your network interface. If you only have addresses starting with fe80 then you are likely link local only and not getting anything globally routable from your ISP.

thanks. i fixed the address (i hope). and i do have an "fe80" address.

Anything starting 2001:db8 is not real.

Try 2a00:1450:8002::6a which is ipv6.google.com

But if you only have fe80:: and ff00:: addresses on your network you do not have external connectivity, those are link local addresses, not routed addresses...

just to say thanks to everyone here - i applied for a tunnel with sixxs and got it working no problems: 10/10 + 10/10.

My iPhone at home half fails. It tells me I don't have IPv6, but I think I do. I can access ipv6.google.com without problem.

ipv6.google.com is not an IPv6-only site. It simply has IPv6 support.

I see now. test-ipv6.com shows me as good, but the browser is preferring IPv4, and I have a 6to4 gateway until AT&T notices that IPv6 happened.

The iphone browser prefers ipv6 if available I think, well my version (iOS 4.3) does.

Does test-ipv6.com say you have a public ipv6 address?

ipv6.google.com is in fact an IPv6 only site that is not accessible at all over IPv4.

This seems true. I don't have IPv6 and the page failed to load for me.

weird.. test-ipv6.com gives me 10/10 for full dual stack compatibility and ipv6test.google.com says I don't have IPv6 at all. Anyone else getting this?

edit: it looks like Safari must run dns requests both as IPv4 and IPv6 and uses whichever returns first. Refreshing a few times found the IPv6 is ready message on ipv6.google

Intermittently, yes. Some of the time it detects IPv6 correctly...

Is that 10/10 on both lines? The first 10/10 just means you have working IPv4, and you don't have a broken IPv6 that will cause problems. So you get 10/10, 0/10 if you just have working ipv4 and no ipv6...

What are the workarounds they talk about?

Here is a useful guide to the kinds of issues and fixes you might get http://www.getipv6.info/index.php/Customer_problems_that_cou...

10/10 for your IPv4 stability and readiness, when publishers offer both IPv4 and IPv6 0/10 for your IPv6 stability and readiness, when publishers are forced to go IPv6 only

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