Throw me a IPv6 bone (sort of was IPv6 ignorance)

Mark Radabaugh mark at
Fri Sep 21 19:42:20 UTC 2012

On 9/21/12 9:40 AM, Jeroen Massar wrote:
> On 2012-09-21 15:31 , Mark Radabaugh wrote:
>> The part of IPv6 that I am unclear on and have not found much
>> documentation on is how to run IPv6 only to end users.   Anyone care to
>> point me in the right direction?
>> Can we assign IPv6 only to end users?  What software/equipment do we
>> need in place as a ISP to ensure these customers can reach IPv4 only hosts?
>> The Interwebs are full of advice on setting up IPv6 tunnels for your
>> house (nice but...).  There is lots of really old documentation out
>> there for IPv6 mechanisms that are depreciated or didn't fly.
>> What is current best practice?
> The IETF BCP is to deploy Dual Stack, thus both IPv4 and IPv6 at the
> same time.
> When that is not possible, as you ran out of IPv4 addresses, you should
> look at Dual Stack Lite (DS Lite) eg as supplied by ISC's AFTR and other
> such implementations.
> Depending on your business model you can of course also stick everybody
> behind a huge NAT or require them to use HTTP proxies to get to the
> Internet as most people define it...
> Do note that if you are asking any of these questions today you are
> years late in reading up and you missed your chance to be prepared for
> this in all kinds of ways.
> Greets,
>   Jeroen
We can already do dual stack - that's not really a problem.  I was 
really rather hoping to avoid the giant NAT box.  I'll take a look at DS 
Lite and or NAT64/DNS64 and see if that makes any sense.

Dual stack isn't all that hard to deploy in the enterprise, perhaps even 
IPv6 only with NAT for backward compatibility.

Running dual stack to residential consumers still has huge issues with 
CPE.  It's not an environment where we have control over the router the 
customer picks up at Walmart.   There is really very little point in 
spending a lot of resources on something the consumer can't currently 
use.  I don't think saying we missed the boat really applies - and the 
consumer CPE ship is sinking at the dock.

Mark Radabaugh

mark at  419.837.5015

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