Hi Tim, 

Thank you for the review. 

Please see inline.

Cheers,
Med

> -----Message d'origine-----
> De : Tim Chown [mailto:[email protected]]
> Envoyé : lundi 5 février 2018 20:07
> À : [email protected]
> Cc : [email protected]; [email protected]
> Objet : Opsdir early review of draft-ietf-opsawg-nat-yang-10
> 
> Reviewer: Tim Chown
> Review result: Has Nits
> 
> I have reviewed this document as part of the Operational directorate's
> ongoing
> effort to review all IETF documents being processed by the IESG.  These
> comments were written with the intent of improving the operational aspects of
> the IETF drafts. Comments that are not addressed in last call may be included
> in AD reviews during the IESG review.  Document editors and WG chairs should
> treat these comments  just like any other last call comments.
> 
> This document defines a YANG model for a wide variety of NAT functions,
> including NAT44, NAT64, CLAT, SIIT and NPT66.
> 
> The document is generally well written, and structured appropriately.  There
> are some very minor grammatical errors. Appropriate documentation prefixes
> are
> used in the Appendix of examples.
> 
> I believe the document is Ready for publication, with Nits.
> 
> Note: I am not a YANG doctor; I see that a separate YANG doctor review was
> performed, and I assume that review has covered Section 3.
> 
> General comment:
> 
> This document is targeted to Standards Track, yet defines a YANG model for an
> Experimental protocol, NPT66; is that acceptable?  (I don't know, but I feel
> the question needs to be raised, given also the text of
> draft-ietf-v6ops-ula-usage-considerations-02.)

[Med] The document defines NPTv6 as a "feature". It does not recommend nor 
argue against the use of NPTv6 per se.

FWIW, I'm aware of one Standards Track RFC which lists NPTv6 as one of its 
deployment scenarios: RFC6887. 

==
   PCP can be used in various deployment scenarios, including:
..

   o  IPv6-to-IPv6 Network Prefix Translation (NPTv6) [RFC6296]
==

> 
> Nits:
> 
> p.4 - I think an Internal Host doesn't really "solicit" a NAT capability;
> that
> implies some messaging between the host and the NAT. Perhaps say "need to
> use",
> or something else.

[Med] Works for me. Thanks.

> 
> Appendix - it would perhaps be easier for the reader if the same
> documentation
> prefixes were used to refer to internal and external networks throughout the
> examples, though this is only a minor style point.

[Med] I updated where it makes sense. 

> 
> Section A.11 - the ULA prefixes used here are not (or very unlikely to be!)
> true ULAs with randomised prefixes. Again, a style point.  Perhaps some
> documentation ULAs need to be defined elsewhere.

[Med] As explicitly stated in titles ("Example of NPTv6 (RFC6296)" and 
"Connecting two Peer Networks (RFC6296)"), these examples are extracted from 
RFC6296. We are re-using the same prefixes as those in 6296-examples. 
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