For what it’s worth, acquiring more IPv4 space is much preferred…. if you 
figure $8-$10 per subscriber when purchasing the IP blocks (assuming that’s 
needed) then perhaps increase your installation charge by $10 to absorb that 
cost?

Dual stack is truly the best solution hands down … everything else comes with 
some variations of headaches - no different than just NAT did in IPv4 world in 
the first place if you were/are doing that today.

In our own case, we offer all end users public IPv4 addresses and where 
technologically possible we offer dual stack.  I have worked through 
transitional technologies for IPv6 in the past and it gave me massive headaches 
so would only ever suggest someone to look at them when no other choice …   to 
continue offering public IPv4 addresses then yes we have already had to find 
ways to acquire additional IP blocks which involved noticeable expenses of 
course.


> On Aug 1, 2016, at 9:55 PM, Josh Reynolds <[email protected]> wrote:
> 
> I could also argue here that ipv4 pricing is still continuing to rise, and 
> will do so for the foreseeable future. Buying it now will result in a 
> valuable resource as long as you don't wait too long to sell it :)
> 
> 
> On Aug 1, 2016 6:00 PM, "Chuck McCown" <[email protected] 
> <mailto:[email protected]>> wrote:
> Yeah this seems so... - 2001 creating a WISP using a single cable modem- type 
> of doing things. 
>  
> I don’t want to use NAT64 to squish a V6 packet on the V4 internet, I want it 
> to automagically tunnel V4 traffic from the customer to the NAT64 gateway 
> where it can go on its merry way if there is no V6 destination address for 
> the other end.  Same thing but different words. 
>  
> Really, I want to stop having to acquire more V4 addresses.  That is truly 
> the ONLY goal. 
>  
> From: Forrest Christian (List Account) <mailto:[email protected]>
> Sent: Monday, August 01, 2016 4:54 PM
> To: af <mailto:[email protected]>
> Subject: Re: [AFMUG] NAT64
>  
> 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 
> <http://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] 
> <mailto:[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] <mailto:[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] <mailto:[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 <http://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] 
> <mailto:[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] <mailto:[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] <mailto:[email protected]>] On 
> Behalf Of Chuck McCown
> Sent: Monday, August 1, 2016 3:32 PM
> To: [email protected] <mailto:[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.
> Tel: 406-449-3345 <> | Address: 3577 Countryside Road, Helena, MT 59602
> [email protected] <mailto:[email protected]> | http://www.packetflux.com 
> <http://www.packetflux.com/>
>  <http://www.linkedin.com/in/fwchristian>  <http://facebook.com/packetflux>  
> <http://twitter.com/@packetflux>
> 

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