[ale] V6 question

[Michael H. Warfield]

On Tue, 2011-02-08 at 07:25 -0500, Geoffrey Myers wrote: 
> Greg Freemyer wrote:
> > NAT was designed fundamentally as a way to multiply one IP into multiple.
> > 
> > That is not needed with IPv6 because you can have an IP for every hair
> > on your head.

> Don't know where I read it, but I read that ipv6 will provide enough ip 
> addresses such that you could have one ip for every square inch of the 
> earth.  So, I assume you mean each of us would have enough IPs for every 
> hair on each of our heads. According to google, the average person has 
> '100.000-150.000, some estimates going up to 200.000' hairs.  On the 
> other hand, there are 1.96 x 1017 square inches on the earth. ;)

> So, anyone know how many ip addresses ipv6 will provide?

End to end...

340,282,366,920,938,463,463,374,607,431,768,211,456

But that number is meaningless.  Let's get to some working numbers...

Number of host addresses in a /64 subnet (local addresses on your wire -
network with only a single subnet):

18,446,744,073,709,551,616

Number of /64 subnets in a "small customer" /56 network:

256

Number of /64 subnets in a "full customer" /48 network:

65,536

Number of /64 subnetworks (single subnet networks) in the global unicast
address space (2000::/3):

2,305,843,009,213,693,952

Number of /56 small networks in the global unicast address space:

9,007,199,254,740,992

Number of /48 full networks in the global unicast address space:

35,184,372,088,832

Total number of 32 bit IPv4 address 0.0.0.0-255.255.255.255

4,294,967,296

Almost 10,000 times more full /48 networks (in the globally addressible
part of the address space) in IPv6 than there are individual IPv4
addresses from one end to the other (which are not all globally
addressible).

Mike

> > So when you get a IPv6 connection, they just give you a few billion
> > IPs to go with it.
> > 
> > Not sure about DHCP.
> > 
> > On Sat, Feb 5, 2011 at 11:31 AM, Jim Lynch
> > <ale_nospam at fayettedigital.com> wrote:
> >> I'm truly sorry to have missed the talks on IPV6.  So how is it going to
> >> replace NAT?  I assume all the systems I have behind my router will have
> >> IPV6 addresses.  Is that correct?  Is DHCP going away? So is the port
> >> the ISP furnishes me going to be just a connection to the wan without a
> >> IP address?  I'm confused.
> >>
> >> Jim.
> >> _______________________________________________
> >> Ale mailing list
> >> Ale at ale.org
> >> http://mail.ale.org/mailman/listinfo/ale
> >> See JOBS, ANNOUNCE and SCHOOLS lists at
> >> http://mail.ale.org/mailman/listinfo
> >>
> > 
> > 
> > 
> 
> 

-- 
Michael H. Warfield (AI4NB) | (770) 985-6132 |  mhw at WittsEnd.com
   /\/\|=mhw=|\/\/          | (678) 463-0932 |  http://www.wittsend.com/mhw/
   NIC whois: MHW9          | An optimist believes we live in the best of all
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