[101411] in North American Network Operators' Group

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RE: Assigning IPv6 /48's to CPE's?

daemon@ATHENA.MIT.EDU (Donald Stahl)
Thu Jan 3 09:34:16 2008

Date: Thu, 3 Jan 2008 09:30:09 -0500 (EST)
From: Donald Stahl <don@calis.blacksun.org>
To: michael.dillon@bt.com
Cc: nanog@merit.edu
In-Reply-To: <D03E4899F2FB3D4C8464E8C76B3B68B001AB7625@E03MVC4-UKBR.domain1.systemhost.net>
Errors-To: owner-nanog@merit.edu


> The only place in which people have noted that there is a possibility
> of running out of bits in the existing IPv6 addressing hierarchy
> is when they look at a model where every residential customer gets
> a /48. In that scenario there is a possibility that we might runout
> in 50 to 100 years from now.
Is it even a possibility then? A /48 to everyone means 48 bits left 
over for the network portion of the address.

That's 281,474,976,710,656 /48 customer networks. It's 16 million times 
the number of class C's in the current IPv4 Internet. Am I just not 
thinking large or long term enough?

-Don

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