[128277] in North American Network Operators' Group
Re: Addressing plan exercise for our IPv6 course
daemon@ATHENA.MIT.EDU (Stephen Sprunk)
Thu Jul 29 13:43:12 2010
Date: Thu, 29 Jul 2010 12:41:40 -0500
From: Stephen Sprunk <stephen@sprunk.org>
To: nanog@nanog.org
In-Reply-To: <C8830D30-81EE-468E-9828-615DC8ED0A28@delong.com>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
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On 29 Jul 2010 12:19, Owen DeLong wrote:
> On Jul 29, 2010, at 8:00 AM, Matthew Walster wrote:
> =20
>> On 29 July 2010 15:49, Owen DeLong <owen@delong.com> wrote:
>> =20
>>> If we give every household on the planet a /48 (approximately 3 billi=
on /48s), we consume less than 1/8192 of 2000::/3.
>>> =20
>> There are 65,536 /48s in a /32. It's not about how available 2000::/3
>> is, it's hassle to keep requesting additional PA space. Some ISPs
>> literally have millions of customers.
>> =20
> If you have millions of customers, why get a /32? Why not take that fac=
t and ask for the right amount of space? 1,000,000 customers should easi=
ly qualify you for a /24 or thereabouts. If you have 8,000,000 customers,=
you should probably be asking for a /20 or thereabouts.
> =20
=2E.. and paying sixteen times as much in assignment and maintenance
fees. See the problem there?
> It's not rocket science to ask for enough address space, and, if you ha=
ve the number of customers to justify it based on a /48 per customer, the=
RIRs will happily allocate it to you.
> =20
Yes. However, I don't think the RIRs are as willing to give out address
space for _potential_ customers, e.g. if a telco or cableco wanted to
assign a single block to each CO/head end to account for future growth.=20
OTOH, you can get address space based on a /48 per actual customer, then
actually assign a /64 per potential customer and have enough for massive
growth.
> Why waste valuable people's time to conserve nearly valueless
> renewable resources?
> =20
By creating artificial scarcity, one can increase profits per unit of
nearly-valueless, renewable resources. See also: De Beers and the
demonizing of artificial diamonds.
S
--=20
Stephen Sprunk "God does not play dice." --Albert Einstein
CCIE #3723 "God is an inveterate gambler, and He throws the
K5SSS dice at every possible opportunity." --Stephen Hawking
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