I've come across two service providers in the last couple of weeks
that have had issues with L2 devices eating IPv6 PMTUD packets. I am
allowed to share some of the information from one of those service
providers here.
$ISP contacted me to ask more about why PMTUD was being reported as
broken on
https://www.ripe.net/ripe/docs/ripe-631
We hope anyone deploying IPv6, and consequently staffing a help desk,
to find this document useful. Please feel free to borrow and adapt it
for your organization's needs.
I'm sharing it here on NANOG because this document is not RIPE region specific.
Love the service that you guys have. I use it as part of training helpdesk
agents as well as field techs. My ISP wants to set up a transparent mirror,
and I encourage other to do so as well.
Awesome. If you're not familiar with it already, be sure to try
helpdesk.test-ipv6.com or
TL:DR? “Thanks, Comcast!” and “Who’s Next?”
The test-ipv6.com site started out 4 years ago, at a table in Seattle,
after an IPv6 round table meeting hosted by Internet Society. John
Brzozowski and myself were each trying to come up with a way to help
end users figure out that their IPv6 internet
On a recent IPv6 providers call, there was a desire for participants
to share information with each other on what works and what breaks in
an IPv6-only environment. I offered to set that up. It was further
suggested I should share this with more than just that small
community; to anyone who
Safari on the iPad seems to be preferring A over if a hostname has
both, though. I can browse to a bracketed IPv6 address so it is working.
I think perhaps it is time to update test-ipv6.com a bit, and have it
penalize the first number when IPv4 is used in preference. IPv4 CGN
will make
I know a lot of people are using / pointing to test-ipv6.com . The hardware
picked a bad week to quit sniffing glue.
Ill be working on trying to get it back up today, I need to source hardware.
Also looking at borrowing a VM for short term.
(speaking only for @test-ipv6.com, not for
On Jun 4, 2012, at 7:09 AM, Jeroen Massar wrote:
You got a bunch of mirrors for it right? Should not be to tricky to get
someone to let their act as the real thing for a bit.
I've got redirects up now to spread the load across VMs. For the next couple
of days, I don't expect a single VM
In that case can anyone explain why the number of IPv4 *only* systems is
increasing rather than decreasing:
http://server8.test-ipv6.com/stats.html
Increased traffic from less-geeky people = more sane numbers overall. The
problem with the graphs on that site is that the audience is self
But anyway, just consider it: a portion of the major websites go
IPv6-only for 24 hours. What happens is that well, 99% of the populace
can't reach them anymore, as the known ones are down, they start calling
and thus overloading the helpdesks of their ISPs.
Won't happen this year or next. Too
Of course I'm assuming individual participants will do stuff, but that
doesn't change that this IPv6 day as it stands now is a one-off event,
not the first step towards the Ultimate Goal.
The intent is to get folks together after we digest the data, to talk
about next steps. Date is not yet
Actually, I have just noticed a slightly more disturbing thing on the Yahoo
IPv6 help page...
Not speaking in any official capacity, but .. thanks.
The location that's affecting the results is pending removal from DNS;
and ASAP we hope to have the name moved to the geo-LB that suppors v6,
In my recent probe of route servers, I found 22 legacy /8's that were partly
or completely unused. I'm a little surprised ARIN/ICANN thinks it's a waste
of time to even try to reclaim them.
How long would that be tied up in legal issues before they were freed?
Several people have suggested I (re)post information about test-ipv6.com
here.
http://test-ipv6.com ..
tests ipv4 and ipv6 by dns name
tests dual stack (will the client break on World IPv6 Day?)
tests ipv6 by IP literal (teredo can pass this)
gives advice to end user about current
Note you can have totally broken IPv6 connectivity and still be
fine on World IPv6 day. You just need applications with good
multi-homing support.
Agreed so far.
No web site can check this for you.
Hmm. What's wrong with asking the browser to try a dual-stack url today,
as a proxy for
Its a shame there is not a pair of images on this site - one originated
from a v4 only box, one a v6 only box. The img src= could point to the
I've been working on something in this direction this past week, that is
primarilly for user facing debugging purposes (versus for a content
The fact that they are so closely monitoring the construction and wanting to
fix it that fast seems a bit over the top for redundant systems.
Even despite what we saw recently in the SF bay area?
If black helicopters are involved, I suspect this is about par on the
paranoia scale.
I agree, it's not the right way to do things. Running a mail server used
to be much easier. Volunteers to help set things up the right way are
always welcome. :-)
Supporting those clients who can't connect is cheaper or more accessible
for you?
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