> In this draft it has some requirements for generating ULA-C prefixes and
> then in 7.0 it requires the RIRs to publish an RFC documenting how they
> will implement these requirements.

I don't think the RIRs necessarily need to publish an RFC. The main
point is for the RIRs to have sufficiently documented what they
propose to do so that everyone is happy with proposal and it's written
down somewhere. The details of exactly what documentation is
sufficient can be discussed and shouldn't become a rathole relative to
the bigger question of whether ULA-C shold go forward at all.

> But a better way is for the ULA-C document to include this.

Well, one thing to balance here is the part the IETF specifies and the
part the RIRs specify (in terms of operational policy). Putting it all
in one document complicates that and might result in the some of the
text appearing to come from the IETF (and the IETF then being
authoritative) rather than the RIRs. I don't think we want that either.

> I note that any algorithm for checking (and registering) a generated
> prefix in the 5 RIR databases could easily be done in advance so
> that each RIR keeps a supply of unique ULA-C prefixes on hand based
> on their forecast rate of requests for such addresses.

There are lots of ways of achieving uniqueness. One thing the authors
discussed quite a bit (with rough consensus at best!) was to what
degree the operational details of how to carry out the proposal should
be specified in this ID. Personally, I'd rather see less detail in the
IETF document, with it concentrating on the desired/required
properties of ULA-Cs. Presumably, if we define the properties
clearly/properly, how they are produced operationally would be a
detail and not really our concern, i.e., so long as the desired
properties are preserved.

Thomas

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