[158290] in North American Network Operators' Group
Re: "Programmers can't get IPv6 thus that is why they do not have
daemon@ATHENA.MIT.EDU (Jared Mauch)
Tue Nov 27 17:28:22 2012
From: Jared Mauch <jared@puck.nether.net>
In-Reply-To: <CAAARkvJcKNBhZwRfObcZA3hO14-33uo4cnzZ47RjXo5S9m4tfg@mail.gmail.com>
Date: Tue, 27 Nov 2012 17:27:56 -0500
To: Bryan Tong <contact@nullivex.com>
Cc: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On Nov 27, 2012, at 4:30 PM, Bryan Tong <contact@nullivex.com> wrote:
> Personally I have ran into this dilema a few times.
>=20
> The code just like network equipment needs dual stacks which is double
> the amount of code and since IPv4 and IPv6 do not share a native
> topology just supporting both kinds of addresses isnt sufficient.
I reject the above statement having operated networks with congruent =
v4+v6 topologies for over a decade.
Doing dual-stack is the easiest method. Any modern hardware supports =
it.
If your upstream doesn't support IPv6, replace them. There are plenty =
of choices these days for IPv6 services. I've seen very large customer =
flows on single ports of IPv6 traffic (8-10Gb/s), so there is real =
traffic out there.
While this may not be feasible for all use cases, I found myself looking =
for internet access about a year ago and each ISP I contacted had simple =
checkboxes on their forms for IPv6 and it was a breeze to turn up. =
(174/6461). I know many others can deliver this service as well (7922, =
2914, 3561, 7018, 3549, 6453) amongst others.
Even server hosting folks offer it as a checkbox as seen here:
https://outlet.softlayer.com/Sales/orderServer/35/14015
Single IPv6 address is free.. a /64 is $5/mo
Its readily available and you can get it via VPN while traveling if it's =
not already native (my Verizon LTE iPad does native IPv6).
It sounds like the threshold is "Didn't pay for a server to host my =
application with IPv6 and can't spend $20/mo for LTE access to have =
native IPv6".
> I agree that some of it comes down to knowledge; most programmers
> learn from experience and lets face it unless you go looking your
> unlikely to run into IPv6 even as of yet. I believe as the ISP
> implements IPv6 and companies get more demand on the customer facing
> side of things it will pick up quickly.
Sure, using gethostbyname() is certainly easier to find code examples, =
but not impossible to find other examples.
> In our datacenters all our software is built with IPv6 addressing
> supported but we have yet to build the logic stack as we are waiting
> for the demand. It makes no sense to build all the support just
> because when there are other important things to do.
There is something else. Many people "cheated" and stuck a 2^32 number =
in an integer datatype for their SQL or other servers. They don't work =
as well with 2^128 sized IPs. They have to undertake the actual effort =
of storing their data in a proper datatype instead of cheating. I've =
seen this over-and-over and likely is a significant impediment just as =
the gethostbyname vs getaddrinfo() system call translations may be.
- Jared=
