Re: [Gen-art] Gen-ART telechat review of draft-ietf-l3sm-l3vpn-service-model-17

<stephane.litkowski@orange.com> Fri, 21 October 2016 07:51 UTC

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From: stephane.litkowski@orange.com
To: Brian E Carpenter <brian.e.carpenter@gmail.com>, "draft-ietf-l3sm-l3vpn-service-model.all@ietf.org" <draft-ietf-l3sm-l3vpn-service-model.all@ietf.org>, General Area Review Team <gen-art@ietf.org>
Thread-Topic: Gen-ART telechat review of draft-ietf-l3sm-l3vpn-service-model-17
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Date: Fri, 21 Oct 2016 07:51:26 +0000
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Subject: Re: [Gen-art] Gen-ART telechat review of draft-ietf-l3sm-l3vpn-service-model-17
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Hi Brian,

I missed this point in my updates. Sorry for that, next version will take it into account.

Brgds,


-----Original Message-----
From: Brian E Carpenter [mailto:brian.e.carpenter@gmail.com] 
Sent: Friday, October 21, 2016 05:42
To: draft-ietf-l3sm-l3vpn-service-model.all@ietf.org; General Area Review Team
Subject: Gen-ART telechat review of draft-ietf-l3sm-l3vpn-service-model-17

I am the assigned Gen-ART reviewer for this draft. The General Area Review Team (Gen-ART) reviews all IETF documents being processed by the IESG for the IETF Chair. Please wait for direction from your document shepherd or AD before posting a new version of the draft.

For more information, please see the FAQ at

<http://wiki.tools.ietf.org/area/gen/trac/wiki/GenArtfaq>.

Document: draft-ietf-l3sm-l3vpn-service-model-17.txt
Reviewer: Brian Carpenter
Review Date: 2016-10-21
IETF LC End Date: 2016-10-11
IESG Telechat date: 2016-10-27

Summary: Almost ready
--------

Comments:
---------

Thanks for responding to my LC comments. I have not checked the details of the yang.

Minor Issues:
-------------

This is a point I missed originally but I mentioned it during the discussion:
The model says:

      | | |   | | +--rw match-flow
      | | |   | |   +--rw dscp?        inet:dscp
      | | |   | |   +--rw tos?         uint8

but tos was obsoleted when dscp was defined by RFC 2474. I don't think you should include tos. You don't mention ECN, which are the two bits from tos that are not included in dscp. Those bits are no good for flow matching because they are variable.  If an operator tries to use the 8 TOS bits for flow matching but a user supports ECN, the matching will not work consistently. So I think it's misleading to include this.

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