[arin-ppml] Encouraging IPv6 Transition

John Curran jcurran at arin.net
Fri May 18 06:44:50 EDT 2012

On May 17, 2012, at 11:58 PM, Astrodog wrote:

>>   Widespread use of provider-independent IPv6 assignments has been deemed 
>>   unacceptable in the past by many in the community due to the potential 
>>   routing impact, ...
> As it stands now, these organizations qualify under ARIN's requirements.
> Is it the intent of the community to tighten the rules? The routing
> problems created by provider-independent addressing are unavoidable, as
> more and more organizations determine that it is not in their interests
> to tie their addressing to a single provider. I do not believe it is in
> the interests of the community to attempt to frustrate these efforts, as
> most of the alternatives are worse, and the organizations involved are
> unlikely to comply willingly. One provider may refuse to route them and
> broadcast the routes, but for a large enough check *someone* will.

Harrison - 

  Actually, my statement was more inclined towards past views  
  than any indication of what is coming.  In particular, each
  time there has been discussion of widespread IPv6 provider-
  independent end-user assignments in the IETF, it has been 
  deemed not viable from technical perspective.

  The difference between allowing end-users to qualify for a
  provider-independent IPv6 block from the registry and having
  all end-users automatically have a PI assignment comes down
  to whether each new Internet connection results in a unique
  route in the IPv6 DFZ.  Tens of thousands of new routes are 
  likely no problem, whereas millions of new routes gets fun.

  Our present model has the vast majority of new IPv6 customers
  using provider-assigned IPv6 space, which means we see the 
  benefit of aggregation in the resulting routing.  Obviously,
  this doesn't apply for multi-homed IPv6 organizations who go
  and get their own IPv6 assignment, but I'm told that such 
  organizations are a small minority of new IPv6 connections.

  So, my statement was not reflective of any intent to change
  the current model, but only to point out that there has been
  consideration in the past of going to entirely to provider-
  independent schemes for IPv6 end-user organizations (such as
  could be obtained with a purely algorithmic assignment scheme)
  and one outcome of that type of change would be undoing the 
  present aggregation benefits which happen in under the current
  architecture by default.


John Curran
President and CEO

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