[arin-ppml] IANA IPv4 /8 burn rate....

Scott Leibrand sleibrand at internap.com
Fri Aug 29 03:05:40 EDT 2008

Ted Mittelstaedt wrote:
>> I am confident that enterprising folks will find a way to increase the 
>> devices-per-IPv4-address ratio as IPv4 addresses become more 
>> costly to obtain.
> But those devices still themselves require IP addresss.  Thus the
> statement your really trying to say is:
> "...enterprising folks will find a way to increase the 
>  devices-per-GLOBALLY-UNIQUE-IPv4-address ratio as IPv4..."

That is a correct reading of my statement...

> In actual fact, the enterprising folks sidestepped this by
> increasing the number of globally unique addresses so that
> IP addresses would not become more costly to obtain.
>   Since either way fixes the problem why is yours more desirable?

You snipped out what I said about "the technical means to serve multiple
devices using a single IPv4 address (such as with NAT or IPv6+NAT-PT)". 
So the only way in which "my way" is more desirable is that it is a 
superset of "your way".  I believe that the best long-term way to increase 
the devices-per-globally-unique-IPv4-address ratio is to put as many hosts 
as possible on IPv6, and provide various translation mechanisms to allow 
them to interoperate with legacy IPv4-only hosts.  I further believe that 
organizations doing so should be able to recoup some of their investment 
costs by recycling the IPv4 addresses freed up in the process, and 
transferring them to another organization for whom a more short-term 
approach is warranted.

>   Everyone who assumes that moving to IPv6 would be better
> has I think already provided a boatload of arguments as to why
> their way would be better.
>   But I have not really heard any arguments from the people who
> want to stay with IPv4 as to why their way would be better.

Maybe because there's almost no one in this debate who is expressing that 
opinion.  Most everyone arguing for a transfer policy (including myself) 
is doing so because they think it is a reasonable short-term accommodation 
to get us through a period of transition, and to provide incentives for 
those best able to transition to do so first.


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