IPv4 sunset date revised : 2009-02-05

Fri Oct 22 18:21:36 UTC 2010

On Fri, Oct 22, 2010 at 10:54 AM,  <bmanning at vacation.karoshi.com> wrote:
> On Fri, Oct 22, 2010 at 09:42:50AM -0700, Cameron Byrne wrote:
>> On Thu, Oct 21, 2010 at 10:20 PM, George Bonser <gbonser at seven.com> wrote:
>> >
>> >
>> >> -----Original Message-----
>> >> From: Christopher Morrow > Sent: Thursday, October 21, 2010 9:49 PM
>> >> To: bmanning
>> >> Cc: NANOG
>> >> Subject: Re: IPv4 sunset date revised : 2009-02-05
>> >
>> >
>> >>
>> >> (now I'm teasing.. .Bill where's your docs on this fantastic new
>> >> teknowlogie?)
>> >>
>> >
>> > I found it here:
>> >
>> > http://www.ivi2.org/
>> >
>> > But the readme is a bit confusing:
>> >
>> > http://www.ivi2.org/code/00-ivi0.5-README
>> >
>> > Trying to figure out how they map a /70 v6 prefix to a /30 v4 prefix
>> > assuming the mapping is to be 1-1
>> >
>>
>> Right, 1 to 1 does not solve any IPv4 exhaustion problems.
>
>
>        ah... but the trick is to only need enough IPv4 in the pool
>        to dynamically talk to the Internet.  Native v6 to Native v6
>        never has to drop back to the Internet, It uses native v6
>        paths.  So the larger the v6 uptake, the fewer Internet addreses
>        you'll need to keep around in your pool.
>
>
>> Going back to the title of the thread, IVI does not help you sunset
>> IPv4 since the same amount of IPv4 is required.
>
>        See above.
>

So works, just not at a large scale.  For larger scale, you need
address sharing like NAT64.