[nvo3] AD review of draft-ietf-nvo3-vmm-16

Martin Vigoureux <martin.vigoureux@nokia.com> Mon, 16 November 2020 13:21 UTC

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To: draft-ietf-nvo3-vmm@ietf.org, "nvo3-chairs@ietf.org" <nvo3-chairs@ietf.org>, "nvo3@ietf.org" <nvo3@ietf.org>
From: Martin Vigoureux <martin.vigoureux@nokia.com>
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Date: Mon, 16 Nov 2020 14:21:32 +0100
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Subject: [nvo3] AD review of draft-ietf-nvo3-vmm-16
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Hi,

I have several concerns with this document.

There hasn't been a single response to the WG LC, which by the way 
happened more than two years ago and the draft has undergone 13 
revisions since then.

This document has an evident formatting issue (text width, section 
titles, Status of This Memo, references, ...), as well as a reasonable 
number of typos / unclear sentences making it quite hard to understand.

It apparently aims at addressing Virtual Machine Mobility, but in fact 
seems to only cover IP address preservation during such type of event. 
This must be clarified.

It is not clear to me what is specific to NVO3 networks in this document.

This document is said to describe solutions *commonly* used in data 
centers. Also, it primarily only describes what needs to be done but not 
how.
This makes me wonder what benefit does it bring to the community and to 
operators of data centers.

This document refers to other specifications which themselves do not 
provide the missing pieces e.g., RFC7666 does not describe how to 
transfer VM states; RFC8014 is not a specification for an NVE-to-NVA 
protocol.

How section 7 relates to the rest of the document is unclear. It seems 
to restate some elements described in 4.2 and 4.3 but not all.

Section 8 and 9 seem to be out of the scope of this document.


In its current state the document is not ready for review by the IESG 
and I'm returning it to the WG. I encourage the WG to evaluate the 
benefit of publishing this as an RFC, to discuss whether this should be 
the product of NVO3 and would an alternate publication stream be more 
appropriate. In any case this document needs more work.


-m