[143380] in North American Network Operators' Group
Re: IPv6 end user addressing
daemon@ATHENA.MIT.EDU (Owen DeLong)
Mon Aug 8 16:31:59 2011
From: Owen DeLong <owen@delong.com>
In-Reply-To: <3E3FDD2AC2CEF442A9D2B00CF5F6D0409A733475@winexmp02>
Date: Mon, 8 Aug 2011 13:25:41 -0700
To: Jonathon Exley <Jonathon.Exley@kordia.co.nz>
Cc: "nanog@nanog.org" <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
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On Aug 7, 2011, at 3:09 PM, Jonathon Exley wrote:
> This has probably been said before, but it makes me uncomfortable to =
think of everybody in the world being given /48 subnets by default.
> All of a sudden that wide expanse of 2^128 IP addresses shrinks to =
2^48 sites. Sure that's still 65535 times more than 2^32 IPv4 addresses, =
but wouldn't it be wise to apply some conservatism now to allow the IPv6 =
address space to last for many more years?=20
> After all, there are only 4 bits of IP version field so the basic =
packet format won't last forever.
>=20
Let's look at this realistically.
In 30+ years of internet development, giving IP addresses to lots of =
things besides just single sites, we still haven't
completely used up the 32 bit space. This includes reserving 1/16th of =
it for unknown purposes that are never to be.
65,536 times enough space for all the sites we deployed in 30+ years =
will more than likely outlast the lifetime of the
protocol, so, yeah, I'm OK with giving every end-site in the world (note =
an end-site is not a person, it's a building,
structure, or tenant in a multi-tenant building or structure).
Owen
P.S. Jonathon: If anything in your email was confidential, too bad. You =
posted it to a public list. Silly notice at the
bottom to that effect removed.
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