[arin-ppml] IPv6 Transition Policy (aka Soft Landing)

Owen DeLong owen at delong.com
Sat Oct 9 07:11:50 EDT 2010

On Oct 8, 2010, at 6:12 PM, Fred Baker wrote:

> On Oct 8, 2010, at 9:28 AM, Gary Giesen wrote:
>> 1) What sort of mechanism are you going to use to verify IPv6 deployment? While I believe service providers can turn up v6 relatively quickly (if they haven't already done so), getting their customers turned up is another thing...
> That is most definitely the case on both counts.
> That said, let me throw a hypothetical question to you. Suppose that a hypothetical ISP had 20,000,000 residential/SOHO/SMB customers and a /32 prefix, and worked out a plan to address routers in its network using a ULA and distribute the /32 as some combination of /48's, /52's, and /56's to its

This would be terrible... An ISP with 20,000,000 customers should NEVER get a /32. They should
get a much larger prefix. Probably at least a /20 if not a /16.

Using ULA to address routers is just dumb.

> customers. It would be in a pretty good position to get some more addresses, I should imagine another /32 - and with any luck, do so by shortening its existing /32 to a /31 or shorter. Were I king (which I note I'm not) I would be able to do the math and say "they will need them whenever they do the deployment" without a lot more proof. My question would not be "so roll them out and renumber your network when you get to a certain deployment level"; my question would be "so show me that with this plan you have deployment in progress, implying that if I give you these addresses now you won't have to renumber your network when you get to that point".
Correct. If you have 20,000,000 existing customers in IPv4, you should have no problem getting
a /20 or better from your RIR for IPv6.

> To my admittedly small mind, the objective here is to enable ISPs to use their resources to develop scalable, manageable IPv6 networks. It seems to me like working with them to accomplish that makes some sense. Yes, one needs to verify. But I should think that every ARIN member has an appropriate NDA, and ARIN itself can count the IPv4 address space allocated to the member, to support the discussion.
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