[AusNOG] IPv6 Addressing

[Brett O'Hara]

Didn't Geoff say based on current policies, ipv6 allocations may run out in
300 to 400 years?

On Thu, Apr 7, 2011 at 8:04 AM, Jones, Rick
<Rick.Jones at au.harveynorman.com>wrote:

> I think we can safely say that the magnitude of the numbers are such that
> the problem will not surface for a very long time, and the technology to
> manage it will be very, very different.  I know it sounds like we are
> putting our heads in the sand, but in fact we are not.
>
> Ipv4 is able to deliver 1,677,216 /24 subnets (ignoring reserved
> addresses).
> Ipv6 is able to deliver 18,446,744,073,709,600,000 /64 subnets (again
> ignoring reserved addresses).
>
> Making the subnet smaller gives us very little practical benefit - CPUs
> like working with numbers on 32 bit boundaries and going to
> 79,228,162,514,264,300,000,000,000,000 /32 subnets gives us no practical
> benefit at all, unless we want to assign addresses at the atomic or
> sub-atomic level.
>
> The benefit of /64 is that it is consistent across the Internet, and means
> that we can forget about the sizes of subnets once and for all.  The order
> of magnitude jump from 32 bits to 128 bits gives us
> 79,228,162,514,264,300,000,000,000,000 ipv4 address spaces to play with, far
> more than we are ever going to use in the next 40 years.
>
> Cheers,
> Rick
>
> -----Original Message-----
> From: ausnog-bounces at lists.ausnog.net [mailto:
> ausnog-bounces at lists.ausnog.net] On Behalf Of Mark Smith
> Sent: Thursday, 7 April 2011 7:25 AM
> To: Cameron
> Cc: ausnog at lists.ausnog.net; 'David Hughes'
> Subject: Re: [AusNOG] IPv6 Addressing
>
> On Thu, 7 Apr 2011 06:52:32 +1000
> "Cameron" <lists at nurve.com.au> wrote:
>
> > > -----Original Message-----
> > > From: ausnog-bounces at lists.ausnog.net [mailto:ausnog-
> > > bounces at lists.ausnog.net] On Behalf Of Mark Andrews
> > > Sent: Thursday, 7 April 2011 12:01 AM
> > > To: David Hughes
> > > Cc: ausnog at lists.ausnog.net
> > > Subject: Re: [AusNOG] IPv6 Addressing
> > >
> > >
> > > If we use those up we can think about how we carve up the next 8th of
> the
> > > IPv6 address space
> >
> > Well when you put it that way, we're still got 240/4 that has been
> allocated
> > for future use.
> >
>
> There's 5/8ths left after the one Mark mentioned. Almost six except ::1,
> and a few other things have been taken from outside the current 1/8th.
>
> > I'd love to believe that we won't be reliving this in 10-20 years but
> it's
> > hard when we've been here before and as far as I can see, we're making
> all
> > the same mistakes just with bigger numbers.
> >
>
> The mistakes being made a maths ones.
>
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