Re: [OPSAWG] Zaheduzzaman Sarker's Discuss on draft-ietf-opsawg-vpn-common-10: (with DISCUSS and COMMENT)

Hi Zahed, 

FWIW, a new version that resolves your DISCUSS is available online: https://www.ietf.org/rfcdiff?url2=draft-ietf-opsawg-vpn-common-11. 

Cheers, 
Med

> -----Message d'origine-----
> De : OPSAWG [mailto:opsawg-bounces@ietf.org] De la part de
> mohamed.boucadair@orange.com
> Envoyé : mercredi 22 septembre 2021 08:09
> À : Zaheduzzaman Sarker <Zaheduzzaman.Sarker@ericsson.com>; The IESG
> <iesg@ietf.org>
> Cc : draft-ietf-opsawg-vpn-common@ietf.org; opsawg@ietf.org; opsawg-
> chairs@ietf.org
> Objet : Re: [OPSAWG] Zaheduzzaman Sarker's Discuss on draft-ietf-opsawg-
> vpn-common-10: (with DISCUSS and COMMENT)
> 
> Hi Zahed,
> 
> Thank you for the review.
> 
> Please see inline.
> 
> Cheers,
> Med
> 
> > -----Message d'origine-----
> > De : Zaheduzzaman Sarker via Datatracker [mailto:noreply@ietf.org]
> > Envoyé : mardi 21 septembre 2021 17:22 À : The IESG <iesg@ietf.org>
> Cc
> > : draft-ietf-opsawg-vpn-common@ietf.org; opsawg-chairs@ietf.org;
> > opsawg@ietf.org; adrian@olddog.co.uk; adrian@olddog.co.uk Objet :
> > Zaheduzzaman Sarker's Discuss on draft-ietf-opsawg-vpn-common-
> > 10: (with DISCUSS and COMMENT)
> >
> > Zaheduzzaman Sarker has entered the following ballot position for
> > draft-ietf-opsawg-vpn-common-10: Discuss
> >
> > When responding, please keep the subject line intact and reply to all
> > email addresses included in the To and CC lines. (Feel free to cut
> > this introductory paragraph, however.)
> >
> >
> > Please refer to https://www.ietf.org/blog/handling-iesg-ballot-
> > positions/
> > for more information about how to handle DISCUSS and COMMENT
> positions.
> >
> >
> > The document, along with other ballot positions, can be found here:
> > https://datatracker.ietf.org/doc/draft-ietf-opsawg-vpn-common/
> >
> >
> >
> > ----------------------------------------------------------------------
> > DISCUSS:
> > ----------------------------------------------------------------------
> >
> > I would like to discuss the extensibility of the model as described in
> > section
> > 3 regarding 'qos-classification-policy' when UDP is used as substrate.
> > See more in my comments bellow.
> >
> 
> [[Med]] Good point. I added this NEW text:
> 
>          Some transport protocols use existing protocols (e.g., TCP or
>          UDP) as substrate.  The match criteria for such protocols may
>          rely upon the 'protocol' under 'l3', TCP/UDP match criteria
>          shown in Figure 4, part of the TCP/UDP payload, or a
>          combination thereof.  This version of the module does not
>          support such advanced match criteria.  Future revisions of the
>          module may consider adding match criteria based on the
>          transport protocol payload (e.g., by means of a bitmask match).
> 
> Do we need to say more? Thanks.
> 
> >
> > ----------------------------------------------------------------------
> > COMMENT:
> > ----------------------------------------------------------------------
> >
> > Thanks to the authors for working on this specifications and
> > addressing TSVART review comments. Thanks Wesley Eddy for your TSVART
> reviews.
> >
> > Comments -
> >
> > * In this specification, UDP match criteria is described and claimed
> > that the model can be augmented to include more L4 transport
> protocols.
> > QUIC (RFC9000) is a new L4 transport protocol and uses UDP as
> substrate.
> > For such L4 transport protocols, it might be ambiguous to apply qos
> > classification policy based on what is defined here. In case of QUIC,
> > it needs to identify from other UDP traffic that is traversing the
> network.
> > Read more on QUIC traffic identification here (
> > https://quicwg.org/ops-
> > drafts/draft-ietf-quic-manageability.html#name-identifying-quic-
> > traffic).
> >
> > I think this specification should consider such potential substrate
> > usage of L4 protocols (specially UDP) and hint on the potential
> > augmentations (there might be several ways to do that) or scope it
> > down to not support such cases.
> >
> 
> [[Med]] I guess this is covered by the NEW text above.
> 
> > * May be the commented text in the section 4 for protocol identifiers
> > should be updated to reflect what is describes in the section 3 for
> > "underlay-transport".
> > Section 3 talks about underlay transports and how they are set.
> >
> 
> [Med]] Good catch. Fixed. Please check https://github.com/IETF-OPSAWG-
> WG/lxnm/commit/b071ca3b8a9dec654b537ecf9c0116d2adf02aca
> 
> 
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