[143322] in North American Network Operators' Group
Re: IPv6 end user addressing
daemon@ATHENA.MIT.EDU (Sascha Lenz)
Sat Aug 6 03:47:49 2011
From: Sascha Lenz <slz@baycix.de>
In-Reply-To: <005f01cc53c2$e52b4200$af81c600$@iname.com>
Date: Sat, 6 Aug 2011 09:47:00 +0200
To: NANOG list <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
Hi,
> Let's clarify -- /48 is much preferred by Owen, but most ISPs seem to =
be
> zeroing in on a /56 for production. Though some ISPs are using /64 =
for
> their trials.
IIRC, there's RfC6177 - covering almost exactly what the original poster =
asked for.
Not sure if it was mentioned already.
/48 is what IPv6 was designed for, /48 per customer (or even per =
customer-site some might say) is supported by the RIR policies,
and there are close to zero reasons not to use a /48. It also eases your =
administration
processes and also operational things.
Of course, if you only have John Average residential customers or =
whatever, use a /56 or /60.
It's your choice. You know your customers best. We're not in a classful =
world again :-)
But do your math, there is no address shortage, handing out a /48 to =
every type of customer
as a single assignment size should be the sane choice.=20
You waste precious time thinking too much about it.
At least don't make your life miserable by experimenting with too many =
different assignment sizes,
or advocate /64s or something, that's considered a design fault which =
will come back to you some day.
Read the RfCs and RIR policy discussions in the archives some years ago.=20=
--=20
Mit freundlichen Gr=FC=DFen / Kind Regards
Sascha Lenz [SLZ-RIPE]
Senior System- & Network Architect
