[182114] in North American Network Operators' Group
Re: Dual stack IPv6 for IPv4 depletion
daemon@ATHENA.MIT.EDU (Owen DeLong)
Fri Jul 10 12:13:58 2015
X-Original-To: nanog@nanog.org
From: Owen DeLong <owen@delong.com>
In-Reply-To: <559F6735.7000603@matthew.at>
Date: Fri, 10 Jul 2015 09:12:50 -0700
To: Matthew Kaufman <matthew@matthew.at>
Cc: nanog@nanog.org
Errors-To: nanog-bounces@nanog.org
> On Jul 9, 2015, at 23:33 , Matthew Kaufman <matthew@matthew.at> wrote:
>=20
> On 7/9/2015 3:07 PM, Owen DeLong wrote:
>>=20
>> Can you offer one valid reason not to give residential users /48s? =
Any benefit whatsoever?
>>=20
>=20
> Sure. To avoid having to go back and deal with ARIN yet again for more =
IPv6 space.
>=20
> One of the hopeful outcomes of IPv6 adoption was that an ISP could get =
enough to last "forever" in a single transaction. But "forever" isn't =
very long at one /48 (or more) per customer.
>=20
> Matthew Kaufman
I don=E2=80=99t understand how that shortens forever if you ask for the =
right size block the first time.
I=E2=80=99ll be surprised if HE hands out enough /48s to empty their /24 =
any time short of something approximating forever. It=E2=80=99s been at =
least 3 years since I got that for them.
They=E2=80=99re definitely handing out a /48 per end site with the =
exception of free end-sites that don=E2=80=99t bother to click the =
=E2=80=9Cgive me a /48=E2=80=9D checkbox.
Getting IPv6 from ARIN is really easy. Getting more IPv6 from ARIN is =
really easy if you get anywhere near filling up your IPv6 block.
MUCH MUCH easier than IPv4.
As an example, I bet if they wanted to, Comcast could easily qualify for =
a /12 under current ARIN policy.
The latest figures I could find show them at just over 22.4 million =
broadband subscribers. Let=E2=80=99s assume they have 40 million just to =
be conservative.
If you packed those in, you could fit them in 3 /24s (actually, about =
2.3 /24s technically). A /12 is 4096 /24s.
Please tell me again how you can=E2=80=99t hand out /48s per end-site =
forever with a single ARIN allocation?
Owen
