IPv6 Ignorance

Suresh Ramasubramanian ops.lists at gmail.com
Mon Sep 17 12:38:19 UTC 2012


With current use cases at least, yes. What do we know of what's going to
happen in a decade or two?

--srs (htc one x)
On Sep 17, 2012 5:58 PM, "John Mitchell" <mitch at illuminati.org> wrote:

> I think people forget how humongous the v6 space is...
>
> Remember that the address space is 2^128 (or 340,282,366,920,938,463,463,*
> *374,607,431,768,211,456 addresses) to put the in perspective (and a
> great sample that explained to me how large it was, you will still get 667
> quadrillion address per square millimetre of the Earth’s Surface.
>
> There's a great article on the myths and debunks of the address space at
> http://rednectar.net/2012/05/**24/just-how-many-ipv6-**
> addresses-are-there-really/<http://rednectar.net/2012/05/24/just-how-many-ipv6-addresses-are-there-really/>one of the things it talks about is the /64 and /48 allocation.
>
> <snip>
> > Given that the first 3 bits of a public IPv6 address are always 001,
> giving /48 allocations to customers means that service providers will only
> have 2^(48-3) or 2^45 allocations of /48 to hand out > to a population of
> approximately 6 billion people. 2^33 is over 8 billion, so assuming a
> population of 2^33, there will be enough IPv6 /48 allocations to cater for
> 2^(45-33) or 2^12 or 4096 IPv6 > address allocations per user in the world."
> </snip>
>
> - Mitch -
>
>
> On 17/09/12 04:23, Randy Bush wrote:
>
>> [ yes, there are a lot of idiots out there.  this is not new.  but ]
>>
>>  "We are totally convinced that the factors that made IPv4 run out of
>>> addresses will remanifest themselves once again and likely sooner than
>>> a lot of us might expect given the "Reccomendations" for "Best
>>> Practice" deployment."
>>>
>> while i am not "totally convinced," i am certainly concerned.  we are
>> doing many of the same things all over again.  remember when rip forced
>> a homogenous, often classful, mask length in a network and we chewed
>> through /24s?  think /64 in ipv6, except it's half the bits not 1/4 of
>> them.  remember when we gave out As and Bs willy nilly?  look at the
>> giant swaths of v6 we give out today in the hopes that someone will
>> deploy it.
>>
>> and don't bs me with how humongous the v6 address space is.  we once
>> though 32 bits was humongous.
>>
>> randy
>>
>
>
>


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