Let me see if I can  help the 'light go on'.

Forget IPv6 for a second.

You assign all of your customers addresses from 100.64.0.0/10, then use a
standard, garden variety (but preferably at least somewhat carrier grade)
NAT box to NAT them to the internet.  The customers computers talk IPv4,
the NAT box does IPv4 to IPv4 NAT (using addresses you already have) and
everything is happy.   This is dirt cheap to do and requires very little
existing infrastructure change.

You can then add non-NATed IPv6 on top of this so each customer also gets a
new shiny IPv6 address which isn't NAT'ed.

NAT64 is expensive and can be buggy since you're trying to squish a heavy
IPV6 packet into the IPV4 internet.  This avoids this problem.


On Mon, Aug 1, 2016 at 4:36 PM, Chuck McCown <[email protected]> wrote:

> Exactly, this is what we need to solve.  No more new V4 addresses and only
> V6 going forward.
>
> -----Original Message----- From: Matt
> Sent: Monday, August 01, 2016 4:29 PM
> To: [email protected]
> Subject: Re: [AFMUG] NAT64
>
> We can, but at the edge, to talk to a V4 host you need a publically
>> routable
>> V4 address.
>> We will be out of addresses very soon.
>>
>
> With NAT64 you will still need one public routeable IPv4 address just
> the same as if you did dual stack with with NATed IPv4 addresses.
> Unless there is something I do not know here?
>
> No matter how you do it I am very interested how it all turns out and
> hope you keep us all posted.
>
>
> -----Original Message----- From: Matt
>> Sent: Monday, August 01, 2016 3:41 PM
>> To: [email protected]
>> Subject: Re: [AFMUG] NAT64
>>
>> Why not dual stack them with IPv6 and a NATed IPv4 IP?  I thought
>> 100.64.0.0/10 private space was just for that purpose.  Seems to be
>> what most cellphones are doing.
>>
>>
>> On Mon, Aug 1, 2016 at 4:34 PM, Chuck McCown <[email protected]> wrote:
>>
>>>
>>> Our V6 only customers need to connect to V4 only destinations.
>>>
>>> From: Sterling Jacobson
>>> Sent: Monday, August 01, 2016 3:33 PM
>>> To: [email protected]
>>> Subject: Re: [AFMUG] NAT64
>>>
>>>
>>> Why use NAT64 again?
>>>
>>>
>>>
>>> I thought we all just route out IPv6 blocks to customers on DHCPv6, no
>>> NAT
>>> required.
>>>
>>>
>>>
>>> From: Af [mailto:[email protected]] On Behalf Of Chuck McCown
>>> Sent: Monday, August 1, 2016 3:32 PM
>>> To: [email protected]
>>> Subject: [AFMUG] NAT64
>>>
>>>
>>>
>>> Still searching for a good solution to go IPV6 only with the subs.  Takes
>>> a
>>> pretty expensive piece of hardware at the core router to do NAT64 in a
>>> carrier class manner.  If anyone has suggestions I am anxious to learn.
>>>
>>
>>
>>
>


-- 
*Forrest Christian* *CEO**, PacketFlux Technologies, Inc.*
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