Re: [Rtg-ooam-dt] [nvo3] AD review of draft-ietf-nvo3-arch-06

["Carlos Pignataro (cpignata)" <[e-mail]>]

David, Alia, Greg,

On Aug 3, 2016, at 12:46 AM, Black, David <[e-mail]<mailto:[e-mail]>> wrote:

Greg,
[-nvo3 list]

Would you and the other members of the overlay OAM design team be interested in working with the NVO3 architecture draft authors on a reasonably short replacement for Section 12 of that architecture draft including a reference to the ooamdt requirements draft?



FWIW, I do not think it is appropriate for the (consensus based) NVO3 Architecture to point to a draft from a Design Team, not adopted or validated by a WG.

Seems to me it is too much of a moving target, and a too brittle one.

Here’s what Section 12 currently says (and I won’t disagree with Alia’s critique of it):

12.  Operations and Management

   The simplicity of operating and debugging overlay networks will be
   critical for successful deployment.  Some architectural choices can
   facilitate or hinder OAM.  Related OAM drafts include
   [I-D.ashwood-nvo3-operational-requirement].

There could be some potential confusion on this — operational considerations is a much larger superset than data plane OAM.

And if punting the OAM part to a future, seems safer to say “a TBD future” than “in this draft-design-team-x”

Thanks,

— Carlos.


Thanks, --David

From: Greg Mirsky [mailto:[e-mail]]
Sent: Sunday, July 31, 2016 1:34 AM
To: Black, David
Cc: Alia Atlas; [e-mail]<mailto:[e-mail]>; [e-mail]<mailto:[e-mail]>; [e-mail]<mailto:[e-mail]>
Subject: Re: [nvo3] AD review of draft-ietf-nvo3-arch-06

Hi David,
greatly appreciate your consideration of draft-ooamdt-rtgwg-ooam-requirement-01. If you have comments, any questions, suggestions please share them and we'll work to address them in timely manner.

Regards,
Greg

On Fri, Jul 29, 2016 at 4:33 PM, Black, David <[e-mail]<mailto:[e-mail]>> wrote:
Hi Alia,

> I will optimistically send this document to IETF Last Call - but the authors do need to update this section and respond to my other concerns.

Thanks for doing this.  Regarding your Major concern:

>  i) I note that draft-ashwood-nvo3-operational-requirement-03 expired about 3 years ago.  Section 12 basically says that
> OAM is important and punts to this draft.  I believe that you will need more details.

Would it be acceptable to provide a little bit more in the way of details and then point to draft-ooamdt-rtgwg-ooam-requirement-01 ?
It seems preferable to have overlay OAM requirements discussions in the context of that draft rather than this NVO3 architecture draft.

For your first minor concern:

>    1) Please add C-VID to the terminology.  It is used without context in 3.1.1.

I think we should rewrite that sentence to just eliminate the C-VID acronym, e.g.,

OLD
   Note that the handling of C-VIDs has additional complications, as
   described in Section 4.2.1 below.
NEW
  Note that there are additional considerations when VLAN tags are used to
  identify both the VN and a Tenant System VLAN within that VN,
  as described in Section 4.2.1 below.

Everything else appears to be useful editorial suggestions.

Thanks, --David

From: Alia Atlas [mailto:[e-mail]<mailto:[e-mail]>]
Sent: Friday, July 29, 2016 6:14 PM
To: [e-mail]<mailto:[e-mail]>; [e-mail]<mailto:[e-mail]>
Subject: AD review of draft-ietf-nvo3-arch-06

First, I would like to thank the authors, David, Jon, Larry, Marc, and Thomas, for their work on this draft and pushing it to completion.

As is customary, I have done my AD review of draft-ietf-nvo3-arch-06 before progressing it.  I do apologize for the delay in my review; I had a lot of documents show up quite quickly this winter and spring.

My primary concern is around the operational and management considerations.  My detailed review is below.   I will optimistically send this document to IETF Last Call - but the authors do need to update this section and respond to my other concerns.  If they are timely, then this can make it onto the IESG telechat on August 18.

Major:

   i) I note that draft-ashwood-nvo3-operational-requirement-03 expired about 3 years ago.  Section 12 basically says that OAM is important and punts to this draft.  I believe that you will need more details.

Minor:

   1) Please add C-VID to the terminology.  It is used without context in 3.1.1.

    2)In Sec 4.1:  "While there may be APIs between the NVE and hypervisor to support necessary interaction, the details of such an API are not in-scope for the IETF to work on."
Could this be softened to "not specifically in-scope for the NVO3 WG to work on"?  If there were agreement that the NVE and hypervisors need interoperability, I could see APIs being in scope.

  3) It looks like work on draft-ietf-nvo3-dataplane-requirements-03 has been abandoned (which is fine).  Please remove the reference.


Nits:

a) In Sec 3.4, it says "in use today".  Replace with "in use in 2016" or the like - since the RFC will live for a long time and not be updated with "today" systems.

Regards & Thanks,
Alia

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