From nobody Tue Sep 3 17:34:20 2019 Return-Path: X-Original-To: netmod@ietf.org Delivered-To: netmod@ietfa.amsl.com Received: from ietfa.amsl.com (localhost [IPv6:::1]) by ietfa.amsl.com (Postfix) with ESMTP id C3EF812004C; Tue, 3 Sep 2019 17:34:19 -0700 (PDT) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit From: Adam Roach via Datatracker To: "The IESG" Cc: draft-ietf-netmod-artwork-folding@ietf.org, Lou Berger , netmod-chairs@ietf.org, lberger@labn.net, netmod@ietf.org X-Test-IDTracker: no X-IETF-IDTracker: 6.100.0 Auto-Submitted: auto-generated Precedence: bulk Reply-To: Adam Roach Message-ID: <156755725979.20611.1246275298689979326.idtracker@ietfa.amsl.com> Date: Tue, 03 Sep 2019 17:34:19 -0700 Archived-At: Subject: [netmod] Adam Roach's No Objection on draft-ietf-netmod-artwork-folding-09: (with COMMENT) X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 04 Sep 2019 00:34:20 -0000 Adam Roach has entered the following ballot position for draft-ietf-netmod-artwork-folding-09: No Objection 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/iesg/statement/discuss-criteria.html for more information about IESG DISCUSS and COMMENT positions. The document, along with other ballot positions, can be found here: https://datatracker.ietf.org/doc/draft-ietf-netmod-artwork-folding/ ---------------------------------------------------------------------- COMMENT: ---------------------------------------------------------------------- Thanks for taking on this work to fill a hole in the tools that we have for production of RFCs. I have one fairly major comment and several editorial suggestions. --------------------------------------------------------------------------- Abstract: > This document defines two strategies for handling long lines in > width-bounded text content. One strategy is based on the historic > use of a single backslash ('\') character to indicate where line- Nit: "historical" --------------------------------------------------------------------------- §1: > According to the RFC Editor, > there is currently no convention in place for how to handle long > lines in such inclusions, other than advising authors to clearly > indicate what manipulation has occurred. This won't age well. Perhaps "Historically, there has been no RFC-Editor-recommended convention in place for how to handle..." > This document defines two strategies for handling long lines in > width-bounded text content. One strategy is based on the historic > use of a single backslash ('\') character to indicate where line- Nit: "historical" --------------------------------------------------------------------------- §7.1.1: > NOTE: '\' line wrapping per BCP XXX (RFC XXXX) Using this string as the start of the specially-wrapped section seems somewhat problematic, as it forecloses on the possibility of also *citing* this BCP at that point in the document. For example, if I were to use this format, I would definitely want to use a string more of the format: NOTE: '\' line wrapping per BCP XXX ([RFC XXXX]) (taking note of the added brackets). If this has already been debated in the working group and the current text is the result of carefully considering this issue and deciding that the use of the specified string has benefits that outweigh the drawback of not being able to cite the document per ordinary convention, then don't afford my suggestion any undue weight. I'm not trying to change a consensus decision. But if this is a simple oversight, I think it does need to be given significant thought. For example, I personally am rather likely to elect to do things "the old way" in my own documents rather than using this format because of the awkwardness of properly citing a normative reference. This same comment applies to §8.1.1, of course. --------------------------------------------------------------------------- > Appendix A. POSIX Shell Script: rfcfold Please add [POSIX.1-2017] as a reference. From nobody Wed Sep 4 02:12:13 2019 Return-Path: X-Original-To: netmod@ietfa.amsl.com Delivered-To: netmod@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id A1F401200DB; Wed, 4 Sep 2019 02:12:12 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -4.198 X-Spam-Level: X-Spam-Status: No, score=-4.198 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_NONE=0.001] autolearn=ham autolearn_force=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 6qRfHy-oDZMY; Wed, 4 Sep 2019 02:12:10 -0700 (PDT) Received: from mailgw1.uni-kl.de (mailgw1.uni-kl.de [IPv6:2001:638:208:120::220]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 3DE1F1200C1; Wed, 4 Sep 2019 02:12:09 -0700 (PDT) Received: from sushi.unix-ag.uni-kl.de (sushi.unix-ag.uni-kl.de [IPv6:2001:638:208:ef34:0:ff:fe00:65]) by mailgw1.uni-kl.de (8.14.4/8.14.4/Debian-8+deb8u2) with ESMTP id x849C7VH129370 (version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 4 Sep 2019 11:12:07 +0200 Received: from sushi.unix-ag.uni-kl.de (ip6-localhost [IPv6:::1]) by sushi.unix-ag.uni-kl.de (8.14.4/8.14.4/Debian-4+deb7u1) with ESMTP id x849C6OX024658 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Wed, 4 Sep 2019 11:12:07 +0200 Received: (from auerswal@localhost) by sushi.unix-ag.uni-kl.de (8.14.4/8.14.4/Submit) id x849C5HI024653; Wed, 4 Sep 2019 11:12:05 +0200 Date: Wed, 4 Sep 2019 11:12:05 +0200 From: Erik Auerswald To: Adam Roach Cc: The IESG , netmod-chairs@ietf.org, draft-ietf-netmod-artwork-folding@ietf.org, netmod@ietf.org Message-ID: <20190904091205.GA18225@unix-ag.uni-kl.de> References: <156755725979.20611.1246275298689979326.idtracker@ietfa.amsl.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <156755725979.20611.1246275298689979326.idtracker@ietfa.amsl.com> User-Agent: Mutt/1.5.21 (2010-09-15) Archived-At: Subject: Re: [netmod] Adam Roach's No Objection on draft-ietf-netmod-artwork-folding-09: (with COMMENT) X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 04 Sep 2019 09:12:13 -0000 Hi Adam, please see below (inline). On Tue, Sep 03, 2019 at 05:34:19PM -0700, Adam Roach via Datatracker wrote: > Adam Roach has entered the following ballot position for > draft-ietf-netmod-artwork-folding-09: No Objection > [...] > ---------------------------------------------------------------------- > COMMENT: > ---------------------------------------------------------------------- > [...] > --------------------------------------------------------------------------- > > > Appendix A. POSIX Shell Script: rfcfold > > Please add [POSIX.1-2017] as a reference. The script is not strictly POSIX compatible, as it uses, e.g., the Bash contruct "[[ ... ]]". Thus I would suggest to change the appendix name instead: s/POSIX Shell/Bash/ Please note that I did not audit the script for additional non-POSIX shell constructs. The script uses non-POSIX tools as well, and sometimes uses tools that are part of POSIX in a non-portable way, i.e., relying on (common, but non-standard) extensions to POSIX. Thanks, Erik From nobody Wed Sep 4 10:56:57 2019 Return-Path: X-Original-To: netmod@ietf.org Delivered-To: netmod@ietfa.amsl.com Received: from ietfa.amsl.com (localhost [IPv6:::1]) by ietfa.amsl.com (Postfix) with ESMTP id 70CCC120B5E; Wed, 4 Sep 2019 10:56:49 -0700 (PDT) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit From: Roman Danyliw via Datatracker To: "The IESG" Cc: draft-ietf-netmod-artwork-folding@ietf.org, Lou Berger , netmod-chairs@ietf.org, lberger@labn.net, netmod@ietf.org X-Test-IDTracker: no X-IETF-IDTracker: 6.100.0 Auto-Submitted: auto-generated Precedence: bulk Reply-To: Roman Danyliw Message-ID: <156761980945.22719.16082541805323491673.idtracker@ietfa.amsl.com> Date: Wed, 04 Sep 2019 10:56:49 -0700 Archived-At: Subject: [netmod] Roman Danyliw's No Objection on draft-ietf-netmod-artwork-folding-09: (with COMMENT) X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 04 Sep 2019 17:56:56 -0000 Roman Danyliw has entered the following ballot position for draft-ietf-netmod-artwork-folding-09: No Objection 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/iesg/statement/discuss-criteria.html for more information about IESG DISCUSS and COMMENT positions. The document, along with other ballot positions, can be found here: https://datatracker.ietf.org/doc/draft-ietf-netmod-artwork-folding/ ---------------------------------------------------------------------- COMMENT: ---------------------------------------------------------------------- (1) Section 1. To make this document more enduring, I’d recommend qualifying the capabilities of xml2rfc (i.e., no line wrapping is done) to a version number. (2) Section 2. Is it worth saying that in addition to the primary target being and (xml2rfc tags), it is also anything authors currently put between “ … ” (sometimes even when not using xml tooling for rendering the draft)? (3) Editorial nits: -- Section 2. Editorial. s/This work may be also be used/This work may also be used/. -- Section 4.2. Editorial. s/already YANG [RFC7950] modules are extracted/YANG [RFC7950] modules are already extracted/. From nobody Wed Sep 4 11:55:19 2019 Return-Path: <0100016cfda15fcf-3dfee6d4-dbfd-4ef4-8fcf-425cf412f924-000000@amazonses.watsen.net> X-Original-To: netmod@ietfa.amsl.com Delivered-To: netmod@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id C1078120BD6; Wed, 4 Sep 2019 11:55:11 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.897 X-Spam-Level: X-Spam-Status: No, score=-1.897 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_NONE=0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1024-bit key) header.d=amazonses.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id mj62da4tmCwn; Wed, 4 Sep 2019 11:55:09 -0700 (PDT) Received: from a8-31.smtp-out.amazonses.com (a8-31.smtp-out.amazonses.com [54.240.8.31]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id D50A4120BB4; Wed, 4 Sep 2019 11:55:08 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/simple; s=6gbrjpgwjskckoa6a5zn6fwqkn67xbtw; d=amazonses.com; t=1567623307; h=From:Message-Id:Content-Type:Mime-Version:Subject:Date:In-Reply-To:Cc:To:References:Feedback-ID; bh=ijvJ7Exk0TLh2N0gjsjEJqrt4wAnK+df45dnucoK7ZE=; b=Bf1+O20PM5SLvrcGzDuqinKvZIgItt4VteWINVTqKYq+O1Y48S39VWxP+jAQZfQz +3Tw6e1thswGK21EQ2SHr1oEJ33PPl2zySCqa98+YjTVvzFIOhC1rnkSXVF7nxUtOsx vbmOxyqHfeLZ0/kdQi6d2cCwK8NUg4P9IkNskrbw= From: Kent Watsen Message-ID: <0100016cfda15fcf-3dfee6d4-dbfd-4ef4-8fcf-425cf412f924-000000@email.amazonses.com> Content-Type: multipart/alternative; boundary="Apple-Mail=_D6881309-A6D9-48A4-B94C-633C237E5A56" Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.11\)) Date: Wed, 4 Sep 2019 18:55:07 +0000 In-Reply-To: <156761980945.22719.16082541805323491673.idtracker@ietfa.amsl.com> Cc: The IESG , draft-ietf-netmod-artwork-folding@ietf.org, Lou Berger , "netmod-chairs@ietf.org" , "netmod@ietf.org" To: Roman Danyliw References: <156761980945.22719.16082541805323491673.idtracker@ietfa.amsl.com> X-Mailer: Apple Mail (2.3445.104.11) X-SES-Outgoing: 2019.09.04-54.240.8.31 Feedback-ID: 1.us-east-1.DKmIRZFhhsBhtmFMNikgwZUWVrODEw9qVcPhqJEI2DA=:AmazonSES Archived-At: Subject: Re: [netmod] Roman Danyliw's No Objection on draft-ietf-netmod-artwork-folding-09: (with COMMENT) X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 04 Sep 2019 18:55:12 -0000 --Apple-Mail=_D6881309-A6D9-48A4-B94C-633C237E5A56 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii Hi Roman, Thanks for your review. I'll prepare an update accounting for your (and = Adam's) comments shortly.=20 First, I have a couple questions: > (1) Section 1. To make this document more enduring, Ib > the capabilities of xml2rfc (i.e., no line wrapping is done) to a = version > number. Do you mean, e.g., s/ The `xml2rfc` utility / The `xml2rfc` utility, at = least up until the time of this document's publication, / ??? [BTW, I just noticed that `xml2rfc` needs a reference...I'll point it to = https://pypi.org/project/xml2rfc ] > (2) Section 2. Is it worth saying that in addition to the primary = target being > and (xml2rfc tags), it is also anything authors > currently put between b > using xml tooling for rendering the draft)? I think that the word "primarily" already provides the flexibility to = use it in other contexts. That said, I don't know what other `xml2rfc` = context exists currently, or do you a future version of the `xml2rfc` = specification or, perhaps, a `foo2rfc` specification? In either case, = could you provide a snippet of what you'd like to see? Thanks again, Kent --Apple-Mail=_D6881309-A6D9-48A4-B94C-633C237E5A56 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=us-ascii Hi = Roman,

Thanks for = your review.  I'll prepare an update accounting for your (and = Adam's) comments shortly. 

First, I have a couple = questions:


(1) Section 1.  To make = this document more enduring, Ib
the capabilities of = xml2rfc  (i.e., no line wrapping is done) to a version
number.

Do you mean, e.g., s/ The= `xml2rfc` utility / The `xml2rfc` utility, at least up until the time = of this document's publication, / ???

[BTW, I just noticed that `xml2rfc` = needs a reference...I'll point it to https://pypi.org/project/xml2rfc]


(2) Section 2. Is it worth = saying that in addition to the primary target being
<sourcecode> and <artwork> (xml2rfc tags), it is = also anything authors
currently put between b
using xml tooling for rendering the draft)?

I = think that the word "primarily" already provides the flexibility to use = it in other contexts.  That said, I don't know what other `xml2rfc` = context exists currently, or do you a future version of the `xml2rfc` = specification or, perhaps, a `foo2rfc` specification?  In either = case, could you provide a snippet of what you'd like to = see?



Thanks again,
Kent


= --Apple-Mail=_D6881309-A6D9-48A4-B94C-633C237E5A56-- From nobody Wed Sep 4 11:56:26 2019 Return-Path: X-Original-To: netmod@ietf.org Delivered-To: netmod@ietfa.amsl.com Received: from ietfa.amsl.com (localhost [IPv6:::1]) by ietfa.amsl.com (Postfix) with ESMTP id 607B7120BB4; Wed, 4 Sep 2019 11:56:17 -0700 (PDT) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit From: Alissa Cooper via Datatracker To: "The IESG" Cc: draft-ietf-netmod-artwork-folding@ietf.org, Lou Berger , netmod-chairs@ietf.org, lberger@labn.net, netmod@ietf.org X-Test-IDTracker: no X-IETF-IDTracker: 6.100.0 Auto-Submitted: auto-generated Precedence: bulk Reply-To: Alissa Cooper Message-ID: <156762337738.22782.18440951708689230098.idtracker@ietfa.amsl.com> Date: Wed, 04 Sep 2019 11:56:17 -0700 Archived-At: Subject: [netmod] Alissa Cooper's Abstain on draft-ietf-netmod-artwork-folding-09: (with COMMENT) X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 04 Sep 2019 18:56:18 -0000 Alissa Cooper has entered the following ballot position for draft-ietf-netmod-artwork-folding-09: Abstain 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/iesg/statement/discuss-criteria.html for more information about IESG DISCUSS and COMMENT positions. The document, along with other ballot positions, can be found here: https://datatracker.ietf.org/doc/draft-ietf-netmod-artwork-folding/ ---------------------------------------------------------------------- COMMENT: ---------------------------------------------------------------------- RFC 7994 is not a product of IETF consensus, so it seems inappropriate to publish a consensus BCP predicated on requirements defined in RFC 7994 which themselves do not have IETF consensus. This would be the only document related to the RFC format in the last 10 years that I'm aware of that would be published on the IETF stream. There has been discussion about how embedding YANG models in RFCs seems like a poor fit for a number of reasons. By standardizing line-folding mechanisms and claiming them as a best practice, this document reinforces the root of that problem rather than trying to fix it. From nobody Wed Sep 4 11:58:02 2019 Return-Path: X-Original-To: netmod@ietfa.amsl.com Delivered-To: netmod@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id D66AA120BB4; Wed, 4 Sep 2019 11:57:54 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.7 X-Spam-Level: X-Spam-Status: No, score=-2.7 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_LOW=-0.7, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=cooperw.in header.b=cY86ayUa; dkim=pass (2048-bit key) header.d=messagingengine.com header.b=Z5wODyp1 Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 4fPko4yn7EXz; Wed, 4 Sep 2019 11:57:51 -0700 (PDT) Received: from out5-smtp.messagingengine.com (out5-smtp.messagingengine.com [66.111.4.29]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id B6770120BD4; Wed, 4 Sep 2019 11:57:51 -0700 (PDT) Received: from compute7.internal (compute7.nyi.internal [10.202.2.47]) by mailout.nyi.internal (Postfix) with ESMTP id 0363022063; Wed, 4 Sep 2019 14:57:51 -0400 (EDT) Received: from mailfrontend2 ([10.202.2.163]) by compute7.internal (MEProxy); Wed, 04 Sep 2019 14:57:51 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cooperw.in; h= content-type:mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; s=fm1; bh=n VhU7uCJBpM9ZsNVUWtgXM3R/pcxCkL4ZzfGPIP0jsU=; b=cY86ayUa+TMdFItnz 6el+GTRIUtodi4DKjoA5uEc3eRSivlWJwZOFiPeruepTa1cs3SJfGqmddL2HCc8/ dLDgaWPCag8cIs7GV/6BTPp4x+I1zS5x+qkBDKp6yrkuWx/82BXgu1GoRjG9jjmy g+ABqhko85LVdk2DFMb4MtLChij8hDTDulyPEMuu8MjdT08i12FZM/UOpydO3V2C u3Cudwd7Po8e3f5ckG4ky3OntKH9eG4gmPyJFf8auH928hlGtVZ5UHBlN3RPDFLC QRBoZcFLhjxyA+7CBQI/TihzAqCxwtt9fYAQbLmRCW83beN1csDjCzyuFl2B6Hef eqF4Q== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:content-transfer-encoding:content-type :date:from:in-reply-to:message-id:mime-version:references :subject:to:x-me-proxy:x-me-proxy:x-me-sender:x-me-sender :x-sasl-enc; s=fm3; bh=nVhU7uCJBpM9ZsNVUWtgXM3R/pcxCkL4ZzfGPIP0j sU=; b=Z5wODyp1zSHJPGz0D+hICkeLRd+TXKQ3GCv7ml4qbbVc7bLUJNVGvK0L1 iEvb9LUEuYyor0iKLHc4UbrcGM9GKGCwotZoltQjReffyIz6cs9rNIPhLS/sxE85 o2IyG7pjMtKe9i4+1fREK2aVEhJIW2UQd8jbbdGWVy5w7la6/tWHGDcD4TYV60PE hmyREgblP5SqFbO+mSZjEr6jqoHlDBpSpOD45PRVvPmZOf3SMmC1wXqa3RUTAFsz F+lZ9H5nw4wGYioQGpBKasGe++NhRR4SHZXfyixzKYAFlcalyRklBt1O19MLwKLy /0K8BKC3USQciG68TdWC6mkcU9R9Q== X-ME-Sender: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgeduvddrudejhedguddvlecutefuodetggdotefrod ftvfcurfhrohhfihhlvgemucfhrghsthforghilhdpqfgfvfdpuffrtefokffrpgfnqfgh necuuegrihhlohhuthemuceftddtnecunecujfgurheptggguffhjgffgffkfhfvofesth hqmhdthhdtvdenucfhrhhomheptehlihhsshgrucevohhophgvrhcuoegrlhhishhsrges tghoohhpvghrfidrihhnqeenucffohhmrghinhepihgvthhfrdhorhhgnecukfhppeduje efrdefkedruddujedrjeegnecurfgrrhgrmhepmhgrihhlfhhrohhmpegrlhhishhsrges tghoohhpvghrfidrihhnnecuvehluhhsthgvrhfuihiivgeptd X-ME-Proxy: Received: from rtp-alcoop-nitro2.cisco.com (unknown [173.38.117.74]) by mail.messagingengine.com (Postfix) with ESMTPA id 25CDFD60057; Wed, 4 Sep 2019 14:57:50 -0400 (EDT) Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 11.5 \(3445.9.1\)) From: Alissa Cooper In-Reply-To: <156567125017.20459.17306464775264462092@ietfa.amsl.com> Date: Wed, 4 Sep 2019 14:57:49 -0400 Cc: gen-art@ietf.org, ietf@ietf.org, netmod@ietf.org, draft-ietf-netmod-artwork-folding.all@ietf.org Content-Transfer-Encoding: quoted-printable Message-Id: <7F44AAAE-44D2-4D1E-9762-172A2FC79778@cooperw.in> References: <156567125017.20459.17306464775264462092@ietfa.amsl.com> To: Roni Even X-Mailer: Apple Mail (2.3445.9.1) Archived-At: Subject: Re: [netmod] [Gen-art] Genart last call review of draft-ietf-netmod-artwork-folding-08 X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 04 Sep 2019 18:57:55 -0000 Roni, thanks for your review. I entered an Abstain ballot. Alissa > On Aug 13, 2019, at 12:40 AM, Roni Even via Datatracker = wrote: >=20 > Reviewer: Roni Even > Review result: Ready >=20 > 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 treat these comments just > like any other last call comments. >=20 > For more information, please see the FAQ at >=20 > . >=20 > Document: draft-ietf-netmod-artwork-folding-?? > Reviewer: Roni Even > Review Date: 2019-08-12 > IETF LC End Date: 2019-08-13 > IESG Telechat date: Not scheduled for a telechat >=20 > Summary: > The document is ready for publication as a BCP > Major issues: >=20 > Minor issues: >=20 > Nits/editorial comments: >=20 >=20 > _______________________________________________ > Gen-art mailing list > Gen-art@ietf.org > https://www.ietf.org/mailman/listinfo/gen-art From nobody Wed Sep 4 23:07:48 2019 Return-Path: X-Original-To: netmod@ietf.org Delivered-To: netmod@ietfa.amsl.com Received: from ietfa.amsl.com (localhost [IPv6:::1]) by ietfa.amsl.com (Postfix) with ESMTP id B09B4120A9B; Wed, 4 Sep 2019 23:07:46 -0700 (PDT) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit From: Benjamin Kaduk via Datatracker To: "The IESG" Cc: draft-ietf-netmod-artwork-folding@ietf.org, Lou Berger , netmod-chairs@ietf.org, lberger@labn.net, netmod@ietf.org X-Test-IDTracker: no X-IETF-IDTracker: 6.100.0 Auto-Submitted: auto-generated Precedence: bulk Reply-To: Benjamin Kaduk Message-ID: <156766366671.22774.7481795788724573201.idtracker@ietfa.amsl.com> Date: Wed, 04 Sep 2019 23:07:46 -0700 Archived-At: Subject: [netmod] Benjamin Kaduk's Discuss on draft-ietf-netmod-artwork-folding-09: (with DISCUSS and COMMENT) X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 05 Sep 2019 06:07:47 -0000 Benjamin Kaduk has entered the following ballot position for draft-ietf-netmod-artwork-folding-09: 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/iesg/statement/discuss-criteria.html for more information about IESG DISCUSS and COMMENT positions. The document, along with other ballot positions, can be found here: https://datatracker.ietf.org/doc/draft-ietf-netmod-artwork-folding/ ---------------------------------------------------------------------- DISCUSS: ---------------------------------------------------------------------- I think the procedures described herein are incomplete without a footer to terminate the un-folding process. Otherwise, it seems that the described algorithms would leave the two-line header for the second and subsequent instances of folded text in a single document. (If we tried to just blindly remove all instances of the header without seeking boundaries, then we would misreconstruct content when different folding algorithms are used in the same document with the single-backslash algorithm occurring first.) I don't think it's proper to refer to a script that requires bash specifically as a "POSIX shell script". I did not attmept to check whether any bash-specific features are used or this requirements stems solely from the shebang line, though. I think the shell script does need to use double-quotes around some variable expansions, especially "$infile" and "$outfile", to work properly for filenames containing spaces. We do quote "$infile" when we're checking that it exists, just not (most of the time) when we actually use it! In addition to the above, I also share Alissa's (and Mirja's) concerns, but feel that Discuss is more appropriate than Abstain, so we can discuss what the best way to get this content published is. For it's fine content, and we should see it published; it's just not immediately clear to me what the right way to do so is. ---------------------------------------------------------------------- COMMENT: ---------------------------------------------------------------------- Section 4.1 Automated folding of long lines is needed in order to support draft compilations that entail a) validation of source input files (e.g., XML, JSON, ABNF, ASN.1) and/or b) dynamic generation of output, using a tool that doesn't observe line lengths, that is stitched into the final document to be submitted. I don't think the intended meaning of "source input files" will be clear to all readers just from this text. Some discussion of how RFCs can consider source code, data structures, generated output, etc., that have standalone representations and natural formats, and the need to display their contents in the RFC format that has different requirements might be helpful context for this paragraph and the next. Section 7.1.2 For some reason my mental model of "RFC style" does not use the word "really" in this way, and prefers alternatives like "very" or "exceptionally". (Also in Section 8.1.2.) Section 7.2.1 1. Determine where the fold will occur. This location MUST be before or at the desired maximum column, and MUST NOT be chosen such that the character immediately after the fold is a space (' ') character. For forced foldings, the location is between the This is a rather awkward natural line break. I suggest an RFC Editor note to make sure that the punctuation around the space character all appears on the same line. 3. On the following line, insert any number of space (' ') characters. I'm not sure I'd characterize the procedure as "complete" when it leaves the value of the output subject to implementation choice such as this. (Note that the next paragraph talks about the resulting "arbitrary number of space" characters, and would presumably also need to be adjusted if this text was adjusted.) We also don't seem to bound this number of spaces to be fewer than the target line length, which only matters in some weirdly pedantic sense. Section 7.2.2 Scan the beginning of the text content for the header described in Section 7.1.1. If the header is not present, starting on the first line of the text content, exit (this text contents does not need to be unfolded). I'm not sure I understand what "starting on the first line of the text content" is intended to mean. (Also in 8.2.2.) Section 8.2.1 If this text content needs to and can be folded, insert the header described in Section 8.1.1, ensuring that any additional printable characters surrounding the header do not result in a line exceeding the desired maximum. We discussed above some cases when text could not be folded using the algorithm from Section 7.2.1; in what case could text not be folded with this algorithm? Just the case when the implementation doesn't support forced folding? Section 10 We should warn against implementations scanning past the end of a buffer (containing the entire contents of a file) when checking what's in the beginning of the next line -- if a file ends with a backslash and "end of line" but no further content, we could perform an out of bounds access if the code assumes it is safe to check for the next line's initial content. Section 12.2 I think that RFC 7991 could be normative, since we say "per RFC 7991" to describe some requirements on behavior. Likewise for RFC 7994, whose character encoding requirements we incorporate by reference. Appendix A I could perhaps argue that we should include a reference to POSIX for "POSIX shell script" but find it somewhat hard to believe that this would be a problem in practice. It's also moot since we require bash specifically, so we'd need to reference bash instead of POSIX. copy/paste the script for local use. As should be evident by the lack of the mandatory header described in Section 7.1.1, these backslashes do not designate a folded line, such as described in Section 7. It perhaps should be, but I think currently is not -- we only talk about using the two-line header to detect instances of folding, without mention of a requirement to be contained within / or similar. It seems that my perception of "common shell style" diverges from that presented in this document, which is not necessarily problematic. (Things like what diagnostics go to stdout vs. stderr, use or "> /dev/null" vs ">> /dev/null", etc.) printf "Usage: rfcfold [-s ] [-c ] [-r] -i " printf " -o \n" This summary usage line doesn't mention -d, -q, or -h. (Maybe it doesn't have to, of course.) # ensure input file doesn't contain a TAB grep $'\t' $infile >> /dev/null 2>&1 (`grep -q` is a thing, here and elsewhere.) # unfold wip file "$SED" '{H;$!d};x;s/^\n//;s/\\\n *//g' $temp_dir/wip > $outfile [I don't remember why the s/^\n// is needed; similarly for the unfold_it_2() case.] if [[ $strategy -eq 2 ]]; then min_supported=`expr ${#hdr_txt_2} + 8` else min_supported=`expr ${#hdr_txt_1} + 8` fi On the face of it this seems like it will produce "folded" output that exceeds the line length, when we give min_supported of 54, use autodetection of strategy, and have input that is incompatible with fold_it_1(). process_input $@ Need double-quotes around "$@" to properly handle arguments with embedded spaces. From nobody Wed Sep 4 23:42:12 2019 Return-Path: X-Original-To: netmod@ietfa.amsl.com Delivered-To: netmod@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 71C1D12006E for ; Wed, 4 Sep 2019 23:42:10 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -6.997 X-Spam-Level: X-Spam-Status: No, score=-6.997 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_HI=-5, SPF_HELO_NONE=0.001, SPF_NONE=0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1024-bit key) header.d=nic.cz Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id cHIbiuhYLRql for ; Wed, 4 Sep 2019 23:42:08 -0700 (PDT) Received: from mail.nic.cz (mail.nic.cz [217.31.204.67]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 22E4612003E for ; Wed, 4 Sep 2019 23:42:08 -0700 (PDT) Received: from birdie (unknown [IPv6:2001:1488:fffe:6:a744:2697:a0ec:a420]) by mail.nic.cz (Postfix) with ESMTPSA id 371ED140D18; Thu, 5 Sep 2019 08:42:06 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=nic.cz; s=default; t=1567665726; bh=CdVRIt9ob2xHk9b3xjT2ZiHN52Fk6PUU7GUuHwt/PNk=; h=From:To:Date; b=IV4oP8aisOgGevmLfXJ+oiBWQcJ3MbNzn2DYYedN1KM0D8WFANqyMVbS3ZvuZBTIe uG2GNnLaqGE3JX+TwENyPbThlq80ALN7dQPgkIees3Bmx035ALxFnBXRkyUQR8MKbn VVl4gL8QEcfbQ5GfMcNjM/SBPKQdsIhwo60kpxnw= Message-ID: From: Ladislav Lhotka To: NETMOD WG Date: Thu, 05 Sep 2019 08:42:06 +0200 In-Reply-To: <156762337738.22782.18440951708689230098.idtracker@ietfa.amsl.com> References: <156762337738.22782.18440951708689230098.idtracker@ietfa.amsl.com> Organization: CZ.NIC Content-Type: text/plain; charset="UTF-8" User-Agent: Evolution 3.32.4 MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Virus-Scanned: clamav-milter 0.100.3 at mail.nic.cz X-Virus-Status: Clean Archived-At: Subject: Re: [netmod] Alissa Cooper's Abstain on draft-ietf-netmod-artwork-folding-09: (with COMMENT) X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 05 Sep 2019 06:42:10 -0000 On Wed, 2019-09-04 at 11:56 -0700, Alissa Cooper via Datatracker wrote: > Alissa Cooper has entered the following ballot position for > draft-ietf-netmod-artwork-folding-09: Abstain > > 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/iesg/statement/discuss-criteria.html > for more information about IESG DISCUSS and COMMENT positions. > > > The document, along with other ballot positions, can be found here: > https://datatracker.ietf.org/doc/draft-ietf-netmod-artwork-folding/ > > > > ---------------------------------------------------------------------- > COMMENT: > ---------------------------------------------------------------------- > > RFC 7994 is not a product of IETF consensus, so it seems inappropriate to > publish a consensus BCP predicated on requirements defined in RFC 7994 which > themselves do not have IETF consensus. This would be the only document related > to the RFC format in the last 10 years that I'm aware of that would be > published on the IETF stream. > > There has been discussion about how embedding YANG models in RFCs seems like a > poor fit for a number of reasons. By standardizing line-folding mechanisms and > claiming them as a best practice, this document reinforces the root of that > problem rather than trying to fix it. Well said, I agree with Alissa's conclusion. Lada > > > _______________________________________________ > netmod mailing list > netmod@ietf.org > https://www.ietf.org/mailman/listinfo/netmod -- Ladislav Lhotka Head, CZ.NIC Labs PGP Key ID: 0xB8F92B08A9F76C67 From nobody Thu Sep 5 02:13:54 2019 Return-Path: X-Original-To: netmod@ietfa.amsl.com Delivered-To: netmod@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id E5D2F120B83; Thu, 5 Sep 2019 02:13:46 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -4.198 X-Spam-Level: X-Spam-Status: No, score=-4.198 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_NONE=0.001] autolearn=ham autolearn_force=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id v_bu91JIZfIe; Thu, 5 Sep 2019 02:13:45 -0700 (PDT) Received: from mailgw1.uni-kl.de (mailgw1.uni-kl.de [IPv6:2001:638:208:120::220]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id E54D412002F; Thu, 5 Sep 2019 02:13:43 -0700 (PDT) Received: from sushi.unix-ag.uni-kl.de (sushi.unix-ag.uni-kl.de [IPv6:2001:638:208:ef34:0:ff:fe00:65]) by mailgw1.uni-kl.de (8.14.4/8.14.4/Debian-8+deb8u2) with ESMTP id x859Dft0070431 (version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 5 Sep 2019 11:13:41 +0200 Received: from sushi.unix-ag.uni-kl.de (ip6-localhost [IPv6:::1]) by sushi.unix-ag.uni-kl.de (8.14.4/8.14.4/Debian-4+deb7u1) with ESMTP id x859DfoM007441 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Thu, 5 Sep 2019 11:13:41 +0200 Received: (from auerswal@localhost) by sushi.unix-ag.uni-kl.de (8.14.4/8.14.4/Submit) id x859Devq007440; Thu, 5 Sep 2019 11:13:40 +0200 Date: Thu, 5 Sep 2019 11:13:40 +0200 From: Erik Auerswald To: Benjamin Kaduk Cc: The IESG , netmod-chairs@ietf.org, draft-ietf-netmod-artwork-folding@ietf.org, netmod@ietf.org Message-ID: <20190905091340.GC429@unix-ag.uni-kl.de> References: <156766366671.22774.7481795788724573201.idtracker@ietfa.amsl.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <156766366671.22774.7481795788724573201.idtracker@ietfa.amsl.com> User-Agent: Mutt/1.5.21 (2010-09-15) Archived-At: Subject: Re: [netmod] Benjamin Kaduk's Discuss on draft-ietf-netmod-artwork-folding-09: (with DISCUSS and COMMENT) X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 05 Sep 2019 09:13:47 -0000 Hi Benjamin, On Wed, Sep 04, 2019 at 11:07:46PM -0700, Benjamin Kaduk via Datatracker wrote: > Benjamin Kaduk has entered the following ballot position for > draft-ietf-netmod-artwork-folding-09: Discuss > [...] > ---------------------------------------------------------------------- > COMMENT: > ---------------------------------------------------------------------- > [...] > "$SED" '{H;$!d};x;s/^\n//;s/\\\n *//g' $temp_dir/wip > $outfile > > [I don't remember why the s/^\n// is needed; similarly for the > unfold_it_2() case.] This is an artifact of how sed's H command works: it adds a newline to the hold space, then appends the pattern space (which does not contain a newline) to the hold space. Thus an extra newline is added before the first line of the input data. This extra newline needs to be removed. > [...] Thanks, Erik From nobody Thu Sep 5 07:41:15 2019 Return-Path: X-Original-To: netmod@ietf.org Delivered-To: netmod@ietfa.amsl.com Received: from ietfa.amsl.com (localhost [IPv6:::1]) by ietfa.amsl.com (Postfix) with ESMTP id BDABE120864; Thu, 5 Sep 2019 07:41:06 -0700 (PDT) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit From: Suresh Krishnan via Datatracker To: "The IESG" Cc: draft-ietf-netmod-artwork-folding@ietf.org, Lou Berger , netmod-chairs@ietf.org, lberger@labn.net, netmod@ietf.org X-Test-IDTracker: no X-IETF-IDTracker: 6.100.0 Auto-Submitted: auto-generated Precedence: bulk Reply-To: Suresh Krishnan Message-ID: <156769446677.22608.7381486936621146842.idtracker@ietfa.amsl.com> Date: Thu, 05 Sep 2019 07:41:06 -0700 Archived-At: Subject: [netmod] Suresh Krishnan's Discuss on draft-ietf-netmod-artwork-folding-09: (with DISCUSS and COMMENT) X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 05 Sep 2019 14:41:07 -0000 Suresh Krishnan has entered the following ballot position for draft-ietf-netmod-artwork-folding-09: 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/iesg/statement/discuss-criteria.html for more information about IESG DISCUSS and COMMENT positions. The document, along with other ballot positions, can be found here: https://datatracker.ietf.org/doc/draft-ietf-netmod-artwork-folding/ ---------------------------------------------------------------------- DISCUSS: ---------------------------------------------------------------------- After some thought I think there are two things about this document that make me uncomfortable enough to ballot Discuss. a) Due to its home in the netmod WG it is highly likely that people outside the yang community have not paid enough attention to this work. Since this is applicable to code fragments of all kinds, I think the home chosen for this RFC might have inadvertently limited input from the broader community. b) Given a) I think it is better that this document go forward as an Informational document rather than a BCP so that use of this technique becomes optional, without the force of a BCP behind it. ---------------------------------------------------------------------- COMMENT: ---------------------------------------------------------------------- I do agree with my Abstaining colleagues that this should probably not be on the IETF stream but I think the work is useful enough to go forward. From nobody Thu Sep 5 08:08:58 2019 Return-Path: <0100016d01f89905-2d99967e-a660-4ae2-a0a3-1fd270ad4a07-000000@amazonses.watsen.net> X-Original-To: netmod@ietfa.amsl.com Delivered-To: netmod@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 113B5120170 for ; Thu, 5 Sep 2019 08:08:56 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.897 X-Spam-Level: X-Spam-Status: No, score=-1.897 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_NONE=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1024-bit key) header.d=amazonses.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id rzGodFM9tP6T for ; Thu, 5 Sep 2019 08:08:54 -0700 (PDT) Received: from a8-32.smtp-out.amazonses.com (a8-32.smtp-out.amazonses.com [54.240.8.32]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id D58851200FB for ; Thu, 5 Sep 2019 08:08:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/simple; s=6gbrjpgwjskckoa6a5zn6fwqkn67xbtw; d=amazonses.com; t=1567696132; h=From:Message-Id:Content-Type:Mime-Version:Subject:Date:In-Reply-To:Cc:To:References:Feedback-ID; bh=bhC3m3x72UhdMcFLGICxya/6m2h7XzitZnlhWWTHSIE=; b=WJA4/s3LsD2L3Zr1kNtwjAt8SVrHqyfwLpkrXZ303IU+tu7cJPX/H+ScokB5fvOs Lmaa/bskMNatlV/h8X8MNVeXpVoSn8+3ysTIy/EGpfXwu1XdWeu19n6wsHQqRnAJPPf 4b368zPGRjDvWuEpzF8stZBtUweyARXnhlsZHm9g= From: Kent Watsen Message-ID: <0100016d01f89905-2d99967e-a660-4ae2-a0a3-1fd270ad4a07-000000@email.amazonses.com> Content-Type: multipart/alternative; boundary="Apple-Mail=_12AF3CCB-A9CE-4C7E-A73F-668CFB5FAC13" Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.11\)) Date: Thu, 5 Sep 2019 15:08:52 +0000 In-Reply-To: Cc: "netmod@ietf.org" To: Ladislav Lhotka References: <156762337738.22782.18440951708689230098.idtracker@ietfa.amsl.com> X-Mailer: Apple Mail (2.3445.104.11) X-SES-Outgoing: 2019.09.05-54.240.8.32 Feedback-ID: 1.us-east-1.DKmIRZFhhsBhtmFMNikgwZUWVrODEw9qVcPhqJEI2DA=:AmazonSES Archived-At: Subject: Re: [netmod] Alissa Cooper's Abstain on draft-ietf-netmod-artwork-folding-09: (with COMMENT) X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 05 Sep 2019 15:08:56 -0000 --Apple-Mail=_12AF3CCB-A9CE-4C7E-A73F-668CFB5FAC13 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii >> There has been discussion about how embedding YANG models in RFCs = seems like a >> poor fit for a number of reasons. By standardizing line-folding = mechanisms and >> claiming them as a best practice, this document reinforces the root = of that >> problem rather than trying to fix it. >=20 > Well said, I agree with Alissa's conclusion. Assuming 'a', yes, 'b' follows 'a'. That said, the concern is nebulous and how to address it more so. Proposals? Assuming the concern is process-overhead for minor spins, perhaps we could leverage the module-versioning work as follows: * Initial and NBC modules go thru standard RFC publishing process = (i.e., there is still a need to publish YANG modules in RFCs). * BC modules can skip standard publishing process but, to be an "IETF" product (not some random fork), they would need to be released via = an IETF-owned mechanism (e.g., an Git repo) with restricted = write-access. Thoughts? Kent --Apple-Mail=_12AF3CCB-A9CE-4C7E-A73F-668CFB5FAC13 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=us-ascii

There = has been discussion about how embedding YANG models in RFCs seems like = a
poor fit for a number of reasons. By standardizing = line-folding mechanisms and
claiming them as a best = practice, this document reinforces the root of that
problem = rather than trying to fix it.

Well said, I = agree with Alissa's conclusion.

Assuming 'a', yes, 'b' = follows 'a'.  That said, the concern is nebulous
and how to address it more so.  Proposals?

Assuming the concern is = process-overhead for minor spins, perhaps we
could = leverage the module-versioning work as follows:

  * Initial and NBC modules go = thru standard RFC publishing process (i.e.,
  =   there is still a need to publish YANG modules in RFCs).

  * BC modules can = skip standard publishing process but, to be an "IETF"
    product (not some random fork), they would need = to be released via an
    IETF-owned = mechanism (e.g., an Git repo) with restricted write-access.

Thoughts?

Kent

= --Apple-Mail=_12AF3CCB-A9CE-4C7E-A73F-668CFB5FAC13-- From nobody Thu Sep 5 08:18:15 2019 Return-Path: X-Original-To: netmod@ietfa.amsl.com Delivered-To: netmod@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 796A71207FC for ; Thu, 5 Sep 2019 08:17:57 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.899 X-Spam-Level: X-Spam-Status: No, score=-1.899 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id RhIoxX7ZX8sn for ; Thu, 5 Sep 2019 08:17:55 -0700 (PDT) Received: from mail.tail-f.com (mail.tail-f.com [46.21.102.45]) by ietfa.amsl.com (Postfix) with ESMTP id 8145012089A for ; Thu, 5 Sep 2019 08:17:55 -0700 (PDT) Received: from localhost (unknown [173.38.220.50]) by mail.tail-f.com (Postfix) with ESMTPSA id A06031AE02AB; Thu, 5 Sep 2019 17:17:53 +0200 (CEST) Date: Thu, 05 Sep 2019 17:17:30 +0200 (CEST) Message-Id: <20190905.171730.1203130976409295649.mbj@tail-f.com> To: kent+ietf@watsen.net Cc: lhotka@nic.cz, netmod@ietf.org From: Martin Bjorklund In-Reply-To: <0100016d01f89905-2d99967e-a660-4ae2-a0a3-1fd270ad4a07-000000@email.amazonses.com> References: <156762337738.22782.18440951708689230098.idtracker@ietfa.amsl.com> <0100016d01f89905-2d99967e-a660-4ae2-a0a3-1fd270ad4a07-000000@email.amazonses.com> X-Mailer: Mew version 6.7 on Emacs 25.2 / Mule 6.0 (HANACHIRUSATO) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Archived-At: Subject: Re: [netmod] Alissa Cooper's Abstain on draft-ietf-netmod-artwork-folding-09: (with COMMENT) X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 05 Sep 2019 15:18:03 -0000 Kent Watsen wrote: > > > >> There has been discussion about how embedding YANG models in RFCs seems like a > >> poor fit for a number of reasons. By standardizing line-folding mechanisms and > >> claiming them as a best practice, this document reinforces the root of that > >> problem rather than trying to fix it. > > > > Well said, I agree with Alissa's conclusion. But the algorithm in the document isn't supposed to be used for YANG modules. It is supposed to be used primarily for XML and JSON snippets (etc). > Assuming 'a', yes, 'b' follows 'a'. That said, the concern is nebulous > and how to address it more so. Proposals? > > Assuming the concern is process-overhead for minor spins I think we need to understand what the "number of reasons" Alissa refers to really are, before we try to come up with solutions. /martin > , perhaps we > could leverage the module-versioning work as follows: > > * Initial and NBC modules go thru standard RFC publishing process (i.e., > there is still a need to publish YANG modules in RFCs). > > * BC modules can skip standard publishing process but, to be an "IETF" > product (not some random fork), they would need to be released via an > IETF-owned mechanism (e.g., an Git repo) with restricted write-access. > > Thoughts? > > Kent > From nobody Thu Sep 5 09:03:41 2019 Return-Path: X-Original-To: netmod@ietfa.amsl.com Delivered-To: netmod@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 7D249120980 for ; Thu, 5 Sep 2019 09:03:31 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.998 X-Spam-Level: X-Spam-Status: No, score=-1.998 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1024-bit key) header.d=shytyi.net Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id FYTnk1D6DxS7 for ; Thu, 5 Sep 2019 09:03:27 -0700 (PDT) Received: from sender-of-o52.zoho.eu (sender-of-o52.zoho.eu [31.186.226.248]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id C93E31209B2 for ; Thu, 5 Sep 2019 09:03:26 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1567699382; cv=none; d=zohomail.eu; s=zohoarc; b=DgQrj+S5hOQWOHqNPs2Po/LTaY+YOzRSiQkY2JV1g0ZT9UUPYozD/auO0l2XnLyGnHumylEMhZYj4rNV4v7RLAQQ8ESdIwiTRh6btiRdJHiymRgZ9zrXVJV4QU5wnFbzxh3o4oNDdXtMeeXVK2w9j7Zp/d6nAoyP5GGfmYMXSUM= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.eu; s=zohoarc; t=1567699382; h=Content-Type:Cc:Date:From:In-Reply-To:MIME-Version:Message-ID:References:Subject:To:ARC-Authentication-Results; bh=vaMCrhdanKf4Dcu4tj1XhfK2ef0ia6vLc1xvquy4Ew4=; b=lDzuXYXmRkLfbaSSEa2BmMwYglVt7Sy/k3Pe6pQc1DwocO/s6xdTFJfpOczdUtdswhpSMoTfro9/cw1Wgq6SuDyMpCsl/+QboX/JGTgQ8j1PXtksEIIIXZZDthM54itFv6YdEiu9iTrr4OkW23sEuQmsHHVYobpEx/ztGOy28Z8= ARC-Authentication-Results: i=1; mx.zohomail.eu; dkim=pass header.i=shytyi.net; spf=pass smtp.mailfrom=ietf.dmytro@shytyi.net; dmarc=pass header.from= header.from= DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; t=1567699382; s=hs; d=shytyi.net; i=ietf.dmytro@shytyi.net; h=Date:From:To:Cc:Message-Id:In-Reply-To:References:Subject:MIME-Version:Content-Type; l=26467; bh=vaMCrhdanKf4Dcu4tj1XhfK2ef0ia6vLc1xvquy4Ew4=; b=Ii8xI0oyDgxunFiN5P5wVQqTXqNApgBEJAyhhr+iGgJEVQoIkQe0ssJVfqPvx1UU 97MrzP0GrQk+Yd7t8lBT1rZMkSG+6AuzECo6r3drhaKeqpye5YuP95mvHb6dnIbZyxm 4yyAwq3J9YwT6YzfVZtVLZc91Ui4wXvVCvQ44ts4= Received: from sender.zoho.eu (172.26.23.78 [172.26.23.78]) by mx.zoho.eu with SMTPS id 1567699379842393.89866914161814; Thu, 5 Sep 2019 18:02:59 +0200 (CEST) Received: from mail.zoho.eu by mx.zoho.eu with SMTP id 1567699379769514.1942318673334; Thu, 5 Sep 2019 18:02:59 +0200 (CEST) Date: Thu, 05 Sep 2019 18:02:59 +0200 From: Dmytro Shytyi To: "Robert Varga" , "billwu" Cc: "netmod" Message-Id: <16d022a2635.cf0e2e825020.1253681289762507320@shytyi.net> In-Reply-To: <16cd8798b80.b402ce899813.5192375594519800096@shytyi.net> References: <155377227553.1573.8548464832229347361.idtracker@ietfa.amsl.com> <16caabd07ae.de4789c8151923.6368018099125205208@shytyi.net> <16cba30dec2.b91b31ed256364.8160264793634017255@shytyi.net> <16cd3d19305.11aec1852361697.7576623717058940792@shytyi.net> <5219ac80-b607-b4b4-8c77-72950d4c5137@hq.sk> <16cd8798b80.b402ce899813.5192375594519800096@shytyi.net> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_14789_1012258766.1567699379765" X-Priority: Medium User-Agent: Zoho Mail X-Mailer: Zoho Mail X-ZohoMailClient: External Archived-At: Subject: Re: [netmod] New Version draft-shytyi-netmod-vysm-02.txt as Working Group document. X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 05 Sep 2019 16:03:40 -0000 ------=_Part_14789_1012258766.1567699379765 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Dear All, Please find the updated version of the VYSM Internet Draft(v0.2). The new version of draft introduces an extension of the yang model defined = in previous version. From now the VYSM supports (0day configuration)/(boots= trap) of the VNFs hosted in the uCPE. With 0day configuration in the uCPE we can setup minimal required configura= tion of vRouter (such as ip address, hostname,etc..), SD-WAN (address of th= e SD-WAN manager, dhcp activation, etc..), etc.. Details: A new version of I-D, draft-shytyi-netmod-vysm-02.txt=C2=A0 has been successfully submitted by Dmytro Shytyi and posted to the=C2=A0 IETF repository.=C2=A0 Name:=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0draft-shytyi-netmod-vy= sm=C2=A0 Revision:=C2=A0=C2=A0=C2=A0=C2=A002=C2=A0 Title:=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0Virtualization YANG S= ervise Model (VYSM)=C2=A0 Document date:=C2=A0=C2=A0=C2=A0=C2=A02019-09-04=C2=A0 Group:=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0Individual Submission= =C2=A0 Pages:=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A010=C2=A0 URL: https://www.ietf.org/internet-drafts/draft-shytyi-netmod-vysm-02.txt= =C2=A0 Status: https://datatracker.ietf.org/doc/draft-shytyi-netmod-vysm/=C2=A0 Htmlized: https://tools.ietf.org/html/draft-shytyi-netmod-vysm-02=C2=A0 Htmlized: https://datatracker.ietf.org/doc/html/draft-shytyi-netmod-vysm=C2= =A0 Diff: https://www.ietf.org/rfcdiff?url2=3Ddraft-shytyi-netmod-vysm-02=C2=A0 Abstract:=C2=A0 This document provides a specification of the Virtual Network=C2=A0 Functions YANG Service Model (VYSM). The VNF YANG Service Model=C2=A0 serves as a base framework for managing an universal Customer-=C2=A0 Premises Equipment (uCPE) NFV subsystem from the Orchestrator.=C2=A0 =C2=A0 >> >># # # : Dmytro Shytyi [mailto:mailto:ietf.dmytro@shytyi.net] >># # # # : 2019# 8# 28#=C2=A0 21:46 >># # # : Robert Varga ; Qin Wu >># # : netmod >># # : Re: [netmod] New Version draft-shytyi-netmod-vysm-02.txt as Working= Group document. >> >>Hello, >> >>Please find comments inline. >>>On 27/08/2019 18:03, Dmytro Shytyi wrote: >>>> Dear All, >>>>=C2=A0 >>>> I am one of the authors of ID VYSM and I would like to draw your >>>> attention to the evolution of the >>>> draft=C2=A0https://www.ietf.org/internet-drafts/draft-shytyi-netmod-vy= sm-01.txt. >>>> Recently we produced (but did not submitted yet) a new version of ID >>>> (02) and I beleive it fits the netmod working group. >>>>=C2=A0 >>>> We would be gratefull if you could suggest if the new version(02) of t= he >>>> document=C2=A0 could become an official work item of the WG? >>>> =C2=A0 =C2=A0 =C2=A0 If yes, could you please indicate which modificat= ions must be done >>>> in the document before submition. >>>=C2=A0 >>>Hmm, looking over the model, it would seem there is quite a bit of >>>overlap with RFC8345 -- to the point I believe the model could be >>>formulated in terms of RFC8345 specialization: >>First of all I would like to thank you for this comment.=C2=A0 >>-Dmytro >>>virtualization -> networks/network >>>=C2=A0 >>>device/links/interfaces/switches/vms are probably a mix of >>>node/termmination-point/link extensions with conjunction with >>>supporting-{topology,node,link}. >>I can imagine mapping: >>virtualization (ID) -> networks/network (RFC 8345) >>links (ID)- >link;(RFC 8345) >>ports (ID)-> termination points;(RFC 8345) >>But still.. it seems here we have to create extension of the model propos= ed in RFC 8345. >>Precisely for node (RFC 8345) we may add types (switches, vms) and futer = add leafs /listsfor type if required (ex: #RAM,#vCPUs and other leafs for V= Ms) >>-Dmytro >>>How would the draft relate to RFC8345? Should it perhaps call out it is >>>a different take on the similar problem, specialized to a particular >>>use-case? >>One can suggest that=C2=A0 in the RFC8345 Figure 1, the block "service To= pology model" can include the proposed in the draft network service descrip= tor with appropriate modification of mapping according to the RFC8345. >> >>Meanwhile I find that the proposed solution(ID) try to solve the problem = descibed below: >> >>The uCPE management mechanism may involve not only YANG modules but=C2=A0= also the speficif logic written in programming languages. The proposed org= anisation of yang model is an attempt to find the best fit=C2=A0 for combin= ation (YANG modules + specific logic written in python for example )=C2=A0 = to manage different existing NFVIs in the uCPE (by the orchestrator). >> >>In the case of uCPE, the mapping (w/wo additinal logic) of "variables " b= etween service yang modules (in the orchestrator) and NETCONF payload(that = is sent to the uCPE) will be more complex (requires additional transformati= ons in the logic) with generic approach, then the solution presented in the= ID, that is tailored to the uCPE.=C2=A0 >> >>Therefore I find the proposed solution as a stadalone generic approach to= manage multiple vendor uCPE that appears to be a particular case tailored = for uCPE NFVIs that may be not nesseraly follows RFC8345. I would be please= d if you could comment this. >> >>-Dmytro >>>Regards, >>>Robert (with RFC8345 co-author hat on) >>>+1, in addition, I am wondering whether this is something related to ove= rlay topology model, if yes, how it is different from DC Fabric topology mo= del defined in RFC8542?=C2=A0 >>>-Qin=C2=A0 >>Thank you for your comment. The RFC8542 condisers PODs in the DC network.= uCPE is located on the customer site. if we consider that uCPE is A POD (w= ith links and nodes like VMs and swithces) then in the RFC8542 describes di= fferent PODs in the network that are interconnected with links. The yang mo= del proposed in the ID ifocuses only on the uCPE interiour network service,= not the interconnection between the uCPEs. Aslo, I explained the differenc= e about extension neded for type of nodes,vms leafs and furter complexity i= n the mapping logic in the reponce to Robert. >>-Dmytro >> >>[Qin]:So you focus on interconnection between local vPE and remote vPE? >[Dmytro]: >Thank you for this question. It seems that the next version of draft shoul= d include the explanation of the uCPE interiour network service. >Example: We can have multiple VMs instantiated in the uCPE (vFW,vRouter/vC= PE,SD-WAN). With support of links and swithes=C2=A0 VMs may create a servic= e chains. >Example of service chains: >1)WAN--vRouter(vCPE)-link-uCPEvSW -link2-vFirewall-LAN >2)WAN--SDWAN--vFirewall--LAN >>It is not clear whether we should distinguish VM from switch. In my under= standing, Upon VNF is instantiated, there is no difference between virtual = and physical worlds. >[Dmytro]: >The VM/VNF in the uCPE could be a vROuter or Vfirewall or an SD-WAN that i= s not a default part of virtual network resources of the uCPE (chapter 3 in= the ID). >The switch (ex. Open vSwith) in the uCPE is a default part of uCPE network= virtual resources (chapter 3 in the ID). >Thus we need to distingish swithes and VNFs to not to mix uCPE network vir= tual resources and VNFs. >Another reason why the destingishing is required: because VM and SW have d= ifferent device-attributes. SW does not require VNFD attributtes. >If we do not distinguish nodes, and only extend the grouping "device attri= butes" for required attributes the switch will have the properties that are= =C2=A0 unused leafs which represent the VM-device-attributes. >>VNF lifecycle management is separated from topology construction, wrong? >[Dmytro]: >a) In case of the NFVIs uCPE the same High Level interface allows to confi= gure both topology construction and VM lifecycle management in the same tra= nsaction. >b) We can not activate Network Service Descriptor without consituent VM no= de information. At the moment of NSD activation we already have to set the = VM node information such as VM capabilities that can be created (previosly)= /(at the moment of configuration of NSD) but have to be a part of the netwo= rk service descriptor at the moment of activation. >[Dmytro] >The Internet Draft also defines the term uCPE that is not defined at IETF = yet. >_______________________________________________ >netmod mailing list >mailto:netmod@ietf.org >https://www.ietf.org/mailman/listinfo/netmod ______________ Dmytro SHYTYI ------=_Part_14789_1012258766.1567699379765 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable =
Dear All,

Please= find the updated version of the VYSM Internet Draft(v0.2).
T= he new version of draft introduces an extension of the yang model defined i= n previous version. From now the VYSM supports (0day configuration)/(bootst= rap) of the VNFs hosted in the uCPE.
With 0day configuration = in the uCPE we can setup minimal required configuration of vRouter (such as= ip address, hostname,etc..), SD-WAN (address of the SD-WAN manager, dhcp a= ctivation, etc..), etc..


Detail= s:
A new version of I-D, draft-shytyi-netmod-vysm-02.txt =
has been successfully submitted = by Dmytro Shytyi and posted to the <= /span>
IETF repository. 

Name:       &nb= sp;draft-shytyi-netmod-vysm <= br>
Revision:    02 
Title:       &nbs= p;Virtualization YANG Servise Model (VYSM) =
Document date:    2019-09-04 
Group:   &= nbsp;    Individual Submission 
Pages:      &nb= sp; 10 
URL: https://www.ietf.org/internet-drafts/draft-shytyi-net= mod-vysm-02.txt 
Htmlized: https://tools.ietf.org/html/draft-shytyi-netmod-vysm-02&= nbsp;

Abstract:=  
This document provides a s= pecification of the Virtual Network =
Functions YANG Service Model (VYSM). The VNF YANG Service Mo= del 
serves as a bas= e framework for managing an universal Customer- 
Premises Equipment (uCPE) NFV subsystem from the= Orchestrator. 
 
>>
>># # # : Dmytro Shytyi = [mailto:ietf.dm= ytro@shytyi.net]
>># # # # : 2019# 8# 28#  21:= 46
>># # # : Robert Varga <nite@hq.sk>; Qin Wu <bill.wu@huawei.com>
>># # : netmod <netmod@ietf.org>
>># # : Re: [netmod] New Ve= rsion draft-shytyi-netmod-vysm-02.txt as Working Group document.
<= div>>>
>>Hello,
>>
<= div>>>Please find comments inline.
>>>On 27/08= /2019 18:03, Dmytro Shytyi wrote:
>>>> Dear All,<= br>
>>>> 
>>>> I am on= e of the authors of ID VYSM and I would like to draw your
>= ;>>> attention to the evolution of the
>>>> Recent= ly we produced (but did not submitted yet) a new version of ID
>>>> (02) and I beleive it fits the netmod working group.
=
>>>> 
>>>> We would b= e gratefull if you could suggest if the new version(02) of the
>>>> document  could become an official work item of the= WG?
>>>>       If yes, could you = please indicate which modifications must be done
>>>= > in the document before submition.
>>> 
=
>>>Hmm, looking over the model, it would seem there is = quite a bit of
>>>overlap with RFC8345 -- to the poi= nt I believe the model could be
>>>formulated in ter= ms of RFC8345 specialization:
>>First of all I would li= ke to thank you for this comment. 
>>-Dmytro
>>>virtualization -> networks/network
&g= t;>> 
>>>device/links/interfaces/switches= /vms are probably a mix of
>>>node/termmination-poin= t/link extensions with conjunction with
>>>supportin= g-{topology,node,link}.
>>I can imagine mapping:
>>virtualization (ID) -> networks/network (RFC 8345)
>>links (ID)- >link;(RFC 8345)
>>port= s (ID)-> termination points;(RFC 8345)
>>But still..= it seems here we have to create extension of the model proposed in RFC 834= 5.
>>Precisely for node (RFC 8345) we may add types (sw= itches, vms) and futer add leafs /listsfor type if required (ex: #RAM,#vCPU= s and other leafs for VMs)
>>-Dmytro
>= >>How would the draft relate to RFC8345? Should it perhaps call out i= t is
>>>a different take on the similar problem, spe= cialized to a particular
>>>use-case?
= >>One can suggest that  in the RFC8345 Figure 1, the block "serv= ice Topology model" can include the proposed in the draft network service d= escriptor with appropriate modification of mapping according to the RFC8345= .
>>
>>Meanwhile I find that the pr= oposed solution(ID) try to solve the problem descibed below:
= >>
>>The uCPE management mechanism may involve no= t only YANG modules but  also the speficif logic written in programmin= g languages. The proposed organisation of yang model is an attempt to find = the best fit  for combination (YANG modules + specific logic written i= n python for example )  to manage different existing NFVIs in the uCPE= (by the orchestrator).
>>
>>In the= case of uCPE, the mapping (w/wo additinal logic) of "variables " between s= ervice yang modules (in the orchestrator) and NETCONF payload(that is sent = to the uCPE) will be more complex (requires additional transformations in t= he logic) with generic approach, then the solution presented in the ID, tha= t is tailored to the uCPE. 
>>
>&= gt;Therefore I find the proposed solution as a stadalone generic approach t= o manage multiple vendor uCPE that appears to be a particular case tailored= for uCPE NFVIs that may be not nesseraly follows RFC8345. I would be pleas= ed if you could comment this.
>>
>>= -Dmytro
>>>Regards,
>>>Robert= (with RFC8345 co-author hat on)
>>>+1, in addition,= I am wondering whether this is something related to overlay topology model= , if yes, how it is different from DC Fabric topology model defined in RFC8= 542? 
>>>-Qin 
>>Thank= you for your comment. The RFC8542 condisers PODs in the DC network. uCPE i= s located on the customer site. if we consider that uCPE is A POD (with lin= ks and nodes like VMs and swithces) then in the RFC8542 describes different= PODs in the network that are interconnected with links. The yang model pro= posed in the ID ifocuses only on the uCPE interiour network service, not th= e interconnection between the uCPEs. Aslo, I explained the difference about= extension neded for type of nodes,vms leafs and furter complexity in the m= apping logic in the reponce to Robert.
>>-Dmytro
>>
>>[Qin]:So you focus on interconnectio= n between local vPE and remote vPE?
>[Dmytro]:
>Thank you for this question. It seems that the next version of draft= should include the explanation of the uCPE interiour network service.
<= /div>
>Example: We can have multiple VMs instantiated in the uCPE (v= FW,vRouter/vCPE,SD-WAN). With support of links and swithes  VMs may cr= eate a service chains.
>Example of service chains:
>1)WAN--vRouter(vCPE)-link-uCPEvSW -link2-vFirewall-LAN
=
>2)WAN--SDWAN--vFirewall--LAN
>>It is not clear= whether we should distinguish VM from switch. In my understanding, Upon VN= F is instantiated, there is no difference between virtual and physical worl= ds.
>[Dmytro]:
>The VM/VNF in the uCPE co= uld be a vROuter or Vfirewall or an SD-WAN that is not a default part of vi= rtual network resources of the uCPE (chapter 3 in the ID).
&g= t;The switch (ex. Open vSwith) in the uCPE is a default part of uCPE networ= k virtual resources (chapter 3 in the ID).
>Thus we need t= o distingish swithes and VNFs to not to mix uCPE network virtual resources = and VNFs.
>Another reason why the destingishing is require= d: because VM and SW have different device-attributes. SW does not require = VNFD attributtes.
>If we do not distinguish nodes, and onl= y extend the grouping "device attributes" for required attributes the switc= h will have the properties that are  unused leafs which represent the = VM-device-attributes.
>>VNF lifecycle management is sep= arated from topology construction, wrong?
>[Dmytro]:
>a) In case of the NFVIs uCPE the same High Level interface all= ows to configure both topology construction and VM lifecycle management in = the same transaction.
>b) We can not activate Network Serv= ice Descriptor without consituent VM node information. At the moment of NSD= activation we already have to set the VM node information such as VM capab= ilities that can be created (previosly)/(at the moment of configuration of = NSD) but have to be a part of the network service descriptor at the moment = of activation.
>[Dmytro]
>The Internet Dr= aft also defines the term uCPE that is not defined at IETF yet.
>_______________________________________________
>ne= tmod mailing list

_= _____________
Dmytro SHYTYI




------=_Part_14789_1012258766.1567699379765-- From nobody Thu Sep 5 09:32:30 2019 Return-Path: X-Original-To: netmod@ietfa.amsl.com Delivered-To: netmod@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 7D46D120BEB for ; Thu, 5 Sep 2019 09:32:22 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -4.197 X-Spam-Level: X-Spam-Status: No, score=-4.197 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_NONE=0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id Jl3NM--w8-g1 for ; Thu, 5 Sep 2019 09:32:20 -0700 (PDT) Received: from mailgw1.uni-kl.de (mailgw1.uni-kl.de [IPv6:2001:638:208:120::220]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id EB5241209B7 for ; Thu, 5 Sep 2019 09:32:19 -0700 (PDT) Received: from sushi.unix-ag.uni-kl.de (sushi.unix-ag.uni-kl.de [IPv6:2001:638:208:ef34:0:ff:fe00:65]) by mailgw1.uni-kl.de (8.14.4/8.14.4/Debian-8+deb8u2) with ESMTP id x85GWHQ9142208 (version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 5 Sep 2019 18:32:17 +0200 Received: from sushi.unix-ag.uni-kl.de (ip6-localhost [IPv6:::1]) by sushi.unix-ag.uni-kl.de (8.14.4/8.14.4/Debian-4+deb7u1) with ESMTP id x85GWHQr006477 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Thu, 5 Sep 2019 18:32:17 +0200 Received: (from auerswal@localhost) by sushi.unix-ag.uni-kl.de (8.14.4/8.14.4/Submit) id x85GWGte006476; Thu, 5 Sep 2019 18:32:16 +0200 Date: Thu, 5 Sep 2019 18:32:16 +0200 From: Erik Auerswald To: Martin Bjorklund Cc: kent+ietf@watsen.net, netmod@ietf.org Message-ID: <20190905163216.GA3497@unix-ag.uni-kl.de> References: <156762337738.22782.18440951708689230098.idtracker@ietfa.amsl.com> <0100016d01f89905-2d99967e-a660-4ae2-a0a3-1fd270ad4a07-000000@email.amazonses.com> <20190905.171730.1203130976409295649.mbj@tail-f.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190905.171730.1203130976409295649.mbj@tail-f.com> User-Agent: Mutt/1.5.21 (2010-09-15) Archived-At: Subject: Re: [netmod] Alissa Cooper's Abstain on draft-ietf-netmod-artwork-folding-09: (with COMMENT) X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 05 Sep 2019 16:32:30 -0000 Hi Martin, On Thu, Sep 05, 2019 at 05:17:30PM +0200, Martin Bjorklund wrote: > Kent Watsen wrote: > > > > >> There has been discussion about how embedding YANG models in RFCs seems like a > > >> poor fit for a number of reasons. By standardizing line-folding mechanisms and > > >> claiming them as a best practice, this document reinforces the root of that > > >> problem rather than trying to fix it. > > > > > > Well said, I agree with Alissa's conclusion. > > But the algorithm in the document isn't supposed to be used for YANG > modules. It is supposed to be used primarily for XML and JSON > snippets (etc). Technically, XML and JSON are whitespace-agnostic and often can be "folded" manually without any folding indicators. That seems to be true for YANG as well. Even Python code usually can be kept under any reasonable line length. Very long names or values could require algorithmic folding, i.e., a generic line-folding mechanism. I personally would try to keep the line length of any code inside an RFC short enough to not need additional algorithmic folding. But if this does not work, e.g., because some name or value is just too long, having a recommended algorithm seems to be better than every author making up another ad-hoc folding scheme. The I-D.ietf-netmod-artwork-folding seems to try to provide a recommended algorithm for the case where a generic line-folding mechanism is needed. Overly long lines sometimes result in lost information in HTML or PDF documents, if a complex layout is used, but no mechanism for dealing with unexpectedly long lines is included. I have seen too many examples of this to believe that this cannot happen with RFCs. Thanks, Erik From nobody Thu Sep 5 09:46:38 2019 Return-Path: <0100016d0251e9df-c5bab8e0-cd5f-4ffa-aa76-f92c5d06ac93-000000@amazonses.watsen.net> X-Original-To: netmod@ietfa.amsl.com Delivered-To: netmod@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 0C4E41200D7; Thu, 5 Sep 2019 09:46:30 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.896 X-Spam-Level: X-Spam-Status: No, score=-1.896 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_NONE=0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1024-bit key) header.d=amazonses.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id tCk_oiRCuSJa; Thu, 5 Sep 2019 09:46:27 -0700 (PDT) Received: from a8-64.smtp-out.amazonses.com (a8-64.smtp-out.amazonses.com [54.240.8.64]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 441A912013F; Thu, 5 Sep 2019 09:46:27 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/simple; s=6gbrjpgwjskckoa6a5zn6fwqkn67xbtw; d=amazonses.com; t=1567701986; h=From:Message-Id:Content-Type:Mime-Version:Subject:Date:In-Reply-To:Cc:To:References:Feedback-ID; bh=NxooOGa3TktMNFUZW/0SrTLwr20Yubg0oPbY4bsKOlI=; b=COklD4vqzIsLfeDN8w31fxAOBWlH4r3uHqPXBJmiL8QUjrFB2Pe/2GiI4mNyUjhM AVQHGBo3ANzkbe1CxpCYNfOU+qSg+wr4vpiiLiXEglH1+/SI7tYlcQkxMPlrUeJjZ5x idAOS6OEAY+9L0crEqYAwP0YjsnFTRXmSBY2DaRc= From: Kent Watsen Message-ID: <0100016d0251e9df-c5bab8e0-cd5f-4ffa-aa76-f92c5d06ac93-000000@email.amazonses.com> Content-Type: multipart/alternative; boundary="Apple-Mail=_588683CC-606A-45A9-95F4-1BC1DB70F812" Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.11\)) Date: Thu, 5 Sep 2019 16:46:25 +0000 In-Reply-To: <156762337738.22782.18440951708689230098.idtracker@ietfa.amsl.com> Cc: The IESG , "netmod-chairs@ietf.org" , draft-ietf-netmod-artwork-folding@ietf.org, "netmod@ietf.org" To: Alissa Cooper References: <156762337738.22782.18440951708689230098.idtracker@ietfa.amsl.com> X-Mailer: Apple Mail (2.3445.104.11) X-SES-Outgoing: 2019.09.05-54.240.8.64 Feedback-ID: 1.us-east-1.DKmIRZFhhsBhtmFMNikgwZUWVrODEw9qVcPhqJEI2DA=:AmazonSES Archived-At: Subject: Re: [netmod] Alissa Cooper's Abstain on draft-ietf-netmod-artwork-folding-09: (with COMMENT) X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 05 Sep 2019 16:46:30 -0000 --Apple-Mail=_588683CC-606A-45A9-95F4-1BC1DB70F812 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii Hi Alissa, Thank you for your review. Comments below. Kent // as co-author > On Sep 4, 2019, at 2:56 PM, Alissa Cooper via Datatracker = wrote: >=20 > Alissa Cooper has entered the following ballot position for > draft-ietf-netmod-artwork-folding-09: Abstain >=20 > 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.) >=20 >=20 > Please refer to = https://www.ietf.org/iesg/statement/discuss-criteria.html > for more information about IESG DISCUSS and COMMENT positions. >=20 >=20 > The document, along with other ballot positions, can be found here: > https://datatracker.ietf.org/doc/draft-ietf-netmod-artwork-folding/ >=20 >=20 >=20 > ---------------------------------------------------------------------- > COMMENT: > ---------------------------------------------------------------------- >=20 > RFC 7994 is not a product of IETF consensus, so it seems inappropriate = to > publish a consensus BCP predicated on requirements defined in RFC 7994 = which > themselves do not have IETF consensus. This would be the only document = related > to the RFC format in the last 10 years that I'm aware of that would be > published on the IETF stream. Agreed. Should the draft re-run through the IAB stream? > There has been discussion about how embedding YANG models in RFCs = seems like a > poor fit for a number of reasons. By standardizing line-folding = mechanisms and > claiming them as a best practice, this document reinforces the root of = that > problem rather than trying to fix it. FWIW, YANG modules are themselves never expected to be folded. Per = Section 5.2 of the draft, authors should do as much as possible within = the YANG format to avoid long lines. =46rom the NETMOD WG's = perspective, this draft is primarily targeting the XML and JSON examples = that should accompany a draft publishing a YANG module. That said, while I'm aware of the concern, it remains unclear, and how = to address it more so. In the meanwhile, there are real and immediate = issues with the ability to use automation to validate structural content = in drafts (e.g., = https://tools.ietf.org/html/draft-kwatsen-git-xiax-automation-01#section-6= = ). This is not just a YANG issue, it is an issue that spans the IETF, = and a solution for it might be considered best practice. Regarding the BCP attribution, I don't have a preference. Actually, I = think it was the WG that pushed for it. I only think the IETF should = label it right, re-running it thru IAB stream if need be. As I see it, = the "best practice" is that draft authors SHOULD stitch pre-folded = inclusions so as to enable automated verification. The format itself is = not best practice. That said, a better solution would be for IETF to 1) = only support XML-based uploads and 2) have Datatracker auto-fold = inclusions as needed for plain-text and PDF outputs (note that folding = is NOT needed, or desired, for HTML output). Kent // as co-author --Apple-Mail=_588683CC-606A-45A9-95F4-1BC1DB70F812 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=us-ascii Hi = Alissa,

Thank you = for your review.  Comments below.

Kent // as co-author


On Sep 4, 2019, at 2:56 PM, = Alissa Cooper via Datatracker <noreply@ietf.org> wrote:

Alissa= Cooper has entered the following ballot position for
draft-ietf-netmod-artwork-folding-09: Abstain
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/iesg/statement/discuss-criteria.htmlfor more information about IESG DISCUSS and COMMENT = positions.


The document, = along with other ballot positions, can be found here:
https://datatracker.ietf.org/doc/draft-ietf-netmod-artwork-fold= ing/



---------------------------------------------------------------= -------
COMMENT:
---------------------------------------------------------------= -------

RFC 7994 is not a product of IETF = consensus, so it seems inappropriate to
publish a = consensus BCP predicated on requirements defined in RFC 7994 which
themselves do not have IETF consensus. This would be the only = document related
to the RFC format in the last 10 years = that I'm aware of that would be
published on the IETF = stream.

Agreed.   Should the draft re-run through the = IAB stream?


There has been = discussion about how embedding YANG models in RFCs seems like a
poor fit for a number of reasons. By standardizing = line-folding mechanisms and
claiming them as a best = practice, this document reinforces the root of that
problem = rather than trying to fix it.

FWIW, = YANG modules are themselves never expected to be folded.  Per = Section 5.2 of the draft, authors should do as much as possible within = the YANG format to avoid long lines.  =46rom the NETMOD WG's = perspective, this draft is primarily targeting the XML and JSON examples = that should accompany a draft publishing a YANG module.

That said, while I'm aware of the concern, it = remains unclear, and how to address it more so.  In the meanwhile, = there are real and immediate issues with the ability to use automation = to validate structural content in drafts (e.g.,  https://tools.ietf.org/html/draft-kwatsen-git-xiax-automation-0= 1#section-6).  This is not just a YANG issue, it is an issue = that spans the IETF, and a solution for it might be considered best = practice.

Regarding the BCP = attribution, I don't have a preference.  Actually, I think it was = the WG that pushed for it.  I only think the IETF should label it = right, re-running it thru IAB stream if need be.   As I see it, the = "best practice" is that draft authors SHOULD stitch pre-folded = inclusions so as to enable automated verification.  The format = itself is not best practice.  That said, a better solution would be = for IETF to 1) only support XML-based uploads and 2) have Datatracker = auto-fold inclusions as needed for plain-text and PDF outputs (note that = folding is NOT needed, or desired, for HTML output).

Kent // as co-author






= --Apple-Mail=_588683CC-606A-45A9-95F4-1BC1DB70F812-- From nobody Thu Sep 5 10:08:14 2019 Return-Path: <0100016d0265ae6e-cda03694-9b45-4d83-b1e6-461849aceb79-000000@amazonses.watsen.net> X-Original-To: netmod@ietfa.amsl.com Delivered-To: netmod@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 1DE09120928; Thu, 5 Sep 2019 10:08:06 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.896 X-Spam-Level: X-Spam-Status: No, score=-1.896 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_NONE=0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1024-bit key) header.d=amazonses.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id ZTgErOR5HFwL; Thu, 5 Sep 2019 10:08:03 -0700 (PDT) Received: from a8-33.smtp-out.amazonses.com (a8-33.smtp-out.amazonses.com [54.240.8.33]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 4F7B912091B; Thu, 5 Sep 2019 10:08:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/simple; s=6gbrjpgwjskckoa6a5zn6fwqkn67xbtw; d=amazonses.com; t=1567703281; h=From:Message-Id:Content-Type:Mime-Version:Subject:Date:In-Reply-To:Cc:To:References:Feedback-ID; bh=yGhu0v78CrDvwiQ1T1vVfFC8p87SUO95vngqHxOGiyA=; b=O6Ly802Dqrlydi5kp2a7pnV3u/LTr/4kOZi9QfEei+Gayh3uqjnfTTOiDJrt6s1K W9eYg1OULIrBb2eBbsW2vedegHWEfUpf2s9RCCyoFn2zIVX4jy7WPcQ3v+2RFAEMaE/ ZT65OX7krOfp8NAq3+vmtNvM7BwmL7YDdKz9HIZ4= From: Kent Watsen Message-ID: <0100016d0265ae6e-cda03694-9b45-4d83-b1e6-461849aceb79-000000@email.amazonses.com> Content-Type: multipart/alternative; boundary="Apple-Mail=_045D2108-C80A-460B-8C8F-125AFD967AF5" Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.11\)) Date: Thu, 5 Sep 2019 17:08:01 +0000 In-Reply-To: <156769446677.22608.7381486936621146842.idtracker@ietfa.amsl.com> Cc: The IESG , draft-ietf-netmod-artwork-folding@ietf.org, Lou Berger , "netmod-chairs@ietf.org" , "netmod@ietf.org" To: Suresh Krishnan References: <156769446677.22608.7381486936621146842.idtracker@ietfa.amsl.com> X-Mailer: Apple Mail (2.3445.104.11) X-SES-Outgoing: 2019.09.05-54.240.8.33 Feedback-ID: 1.us-east-1.DKmIRZFhhsBhtmFMNikgwZUWVrODEw9qVcPhqJEI2DA=:AmazonSES Archived-At: Subject: Re: [netmod] Suresh Krishnan's Discuss on draft-ietf-netmod-artwork-folding-09: (with DISCUSS and COMMENT) X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 05 Sep 2019 17:08:07 -0000 --Apple-Mail=_045D2108-C80A-460B-8C8F-125AFD967AF5 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii Hi Suresh, Thank you for your review. Comments below. Kent // as co-author > On Sep 5, 2019, at 10:41 AM, Suresh Krishnan via Datatracker = wrote: >=20 > Suresh Krishnan has entered the following ballot position for > draft-ietf-netmod-artwork-folding-09: Discuss >=20 > 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.) >=20 >=20 > Please refer to = https://www.ietf.org/iesg/statement/discuss-criteria.html > for more information about IESG DISCUSS and COMMENT positions. >=20 >=20 > The document, along with other ballot positions, can be found here: > https://datatracker.ietf.org/doc/draft-ietf-netmod-artwork-folding/ >=20 >=20 >=20 > ---------------------------------------------------------------------- > DISCUSS: > ---------------------------------------------------------------------- >=20 > After some thought I think there are two things about this document = that make > me uncomfortable enough to ballot Discuss. >=20 > a) Due to its home in the netmod WG it is highly likely that people = outside the > yang community have not paid enough attention to this work. Since this = is > applicable to code fragments of all kinds, I think the home chosen for = this RFC > might have inadvertently limited input from the broader community. Agreed. The original I-D was targeted for IAB stream. It wasn't going = to be presented in NETMOD, but did (by coercion). During the = presentation I mentioned that its applicability was more than NETMOD and = that it should go thru IAB, just like the "xml2rfc" RFCs (7749 and = 7991). The working group felt that it should stay in the WG and hence = here we are. :sigh: > b) Given a) I think it is better that this document go forward as an > Informational document rather than a BCP so that use of this technique = becomes > optional, without the force of a BCP behind it. I'm okay with this, modulo my comment to Alissa. Actually, if we only = view the RFC as specifying a format then, in my mind, it doesn't = actually contain the "best practice". FWIW, SHOULD appears only once, = in a sentence stating that folding SHOULD be automated, in a section = titled "Goals". That said, if not a BCP, then how to encourage people = to use it, so that automation works? For this reason alone, it seems = that either the draft should be a BCP or Datatracker is updated to = auto-fold as needed. Perhaps the right answer is to do Informational = now and hope that Datatracker is updated in time? > ---------------------------------------------------------------------- > COMMENT: > ---------------------------------------------------------------------- >=20 > I do agree with my Abstaining colleagues that this should probably not = be on > the IETF stream but I think the work is useful enough to go forward. It should've been on the IAB stream. Whether it should go forward, = after having the BCP attribute removed, or re-run via the IAB stream is = up to the IESG. Kent // as co-author --Apple-Mail=_045D2108-C80A-460B-8C8F-125AFD967AF5 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=us-ascii Hi = Suresh,

Thank you = for your review.  Comments below.

Kent // as co-author


On Sep 5, 2019, at 10:41 AM, Suresh Krishnan = via Datatracker <noreply@ietf.org> wrote:

Suresh= Krishnan has entered the following ballot position for
draft-ietf-netmod-artwork-folding-09: 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/iesg/statement/discuss-criteria.htmlfor more information about IESG DISCUSS and COMMENT = positions.


The document, = along with other ballot positions, can be found here:
https://datatracker.ietf.org/doc/draft-ietf-netmod-artwork-fold= ing/



---------------------------------------------------------------= -------
DISCUSS:
---------------------------------------------------------------= -------

After some thought I think there = are two things about this document that make
me = uncomfortable enough to ballot Discuss.

a) = Due to its home in the netmod WG it is highly likely that people outside = the
yang community have not paid enough attention to this = work. Since this is
applicable to code fragments of all = kinds, I think the home chosen for this RFC
might have = inadvertently limited input from the broader community.

Agreed.=  The original I-D was targeted for IAB stream.  It wasn't = going to be presented in NETMOD, but did (by coercion).  During the = presentation I mentioned that its applicability was more than NETMOD and = that it should go thru IAB, just like the "xml2rfc" RFCs (7749 and = 7991).  The working group felt that it should stay in the WG and = hence here we are.  :sigh:


b) Given a) I think it is better that this document go = forward as an
Informational document rather than a BCP so = that use of this technique becomes
optional, without the = force of a BCP behind it.

I'm okay with this, modulo my comment to Alissa. =   Actually, if we only view the RFC as specifying a format then, in = my mind, it doesn't actually contain the "best practice".  FWIW, = SHOULD appears only once, in a sentence stating that folding SHOULD be = automated, in a section titled "Goals".  That said, if not a BCP, = then how to encourage people to use it, so that automation works? =  For this reason alone, it seems that either the draft should be a = BCP or Datatracker is updated to auto-fold as needed.  Perhaps =  the right answer is to do Informational now and hope that = Datatracker is updated in time?



---------------------------------------------------------------= -------
COMMENT:
---------------------------------------------------------------= -------

I do agree with my Abstaining = colleagues that this should probably not be on
the IETF = stream but I think the work is useful enough to go forward.

It = should've been on the IAB stream.  Whether it should go forward, = after having the BCP attribute removed, or re-run via the IAB stream is = up to the IESG.


Kent // as = co-author


= --Apple-Mail=_045D2108-C80A-460B-8C8F-125AFD967AF5-- From nobody Thu Sep 5 11:27:18 2019 Return-Path: X-Original-To: netmod@ietfa.amsl.com Delivered-To: netmod@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 378E3120119 for ; Thu, 5 Sep 2019 11:27:17 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.997 X-Spam-Level: X-Spam-Status: No, score=-1.997 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id WD-76IiuAY_7 for ; Thu, 5 Sep 2019 11:27:13 -0700 (PDT) Received: from mail-pg1-x542.google.com (mail-pg1-x542.google.com [IPv6:2607:f8b0:4864:20::542]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 645C01200F3 for ; Thu, 5 Sep 2019 11:27:13 -0700 (PDT) Received: by mail-pg1-x542.google.com with SMTP id n190so1890028pgn.0 for ; Thu, 05 Sep 2019 11:27:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:subject:from:in-reply-to:date:cc:message-id:references :to; bh=UdQoZxROcHZYjfMOlwtFHYft7J7mu9aelPRiMV5fNcw=; b=iky+arYJHXZFckOunGzt7TIpVRbR4yqyXf9XGjvWLR8ddaoqqRKXNeEh1JlpgQslIV Zo8M6iqkicJ2WkAHs5vjb72kYFxKfxdZf2yjosXjGE0KcsVKHwD+53T9YO06X/NwHvph ojfmwlS7bRtc6wKT2HhDfHRRycLz9N0TmznZLYvYzF7wgvymISGbsoqD82L2t4poVCEC q/ETbQ2AzMWwqn3WGHxch+TEw/trZpEMxHFy9bjvL9y99gsw9ueGnfuwn4FH2rx83OSp rn0NAPZTHehPaZvUFyPqeaK7pkuXlIXw9S7XGJt3jhEg4D6uIBII97Z5AswAo5gSJAhv c4PA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:subject:from:in-reply-to:date:cc :message-id:references:to; bh=UdQoZxROcHZYjfMOlwtFHYft7J7mu9aelPRiMV5fNcw=; b=r6GJmYn1WOeaMii+LrC7UM7ke8dxBqTjW6OqtiijnIjA4awZKyeWt7XZFVamfthKBD 4vcg+g/YkXEhfiwzKKw1g5HUUZr0Vm/FsGz2Gsl5VF1zI8tQgTHCe+FcNWKKJXP03Eoe GkWbHkd57ediWFJnFiY1gZE0vymsMfn0mqYf3uVKb+52p+N7SRoLmK3X39obcaBIaLVs G+tgqaxYd8RYbPQz2suWJk8hOs1lFJbUzOtX1+MZc2yPFhP/e7PO3S6H15zV86RixOaf Q5+T24loyPCSMyINV8iLmcdU26IyuCO2lW72hnmz+iSDzE2xzO0lVR4+0xcF93XrXwcR PkTQ== X-Gm-Message-State: APjAAAVFopj4+FSQz8M4sEjjD4DXnrat1mbZWZE5p6kViiMyvWQDIA9t E0pT8c1Q8u/oDuRhoZcxP0Y= X-Google-Smtp-Source: APXvYqySUFSd8IpE/Exb+koNw2V2UW9ar4IAWQka8QsAMCNQgGG6Mn7h/h8t5mWsWfGcIYyU/5/WpA== X-Received: by 2002:a65:640a:: with SMTP id a10mr4374897pgv.338.1567708032645; Thu, 05 Sep 2019 11:27:12 -0700 (PDT) Received: from [10.33.122.240] ([66.170.99.1]) by smtp.gmail.com with ESMTPSA id e129sm2757877pfa.92.2019.09.05.11.27.11 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 05 Sep 2019 11:27:12 -0700 (PDT) Content-Type: multipart/alternative; boundary="Apple-Mail=_309C4C25-54BF-49EB-ABBC-63521627BB2A" Mime-Version: 1.0 (Mac OS X Mail 11.5 \(3445.9.1\)) From: Mahesh Jethanandani X-Priority: Medium In-Reply-To: <16d022a2635.cf0e2e825020.1253681289762507320@shytyi.net> Date: Thu, 5 Sep 2019 11:27:10 -0700 Cc: Robert Varga , billwu , netmod , Diego Lopez Message-Id: References: <155377227553.1573.8548464832229347361.idtracker@ietfa.amsl.com> <16caabd07ae.de4789c8151923.6368018099125205208@shytyi.net> <16cba30dec2.b91b31ed256364.8160264793634017255@shytyi.net> <16cd3d19305.11aec1852361697.7576623717058940792@shytyi.net> <5219ac80-b607-b4b4-8c77-72950d4c5137@hq.sk> <16cd8798b80.b402ce899813.5192375594519800096@shytyi.net> <16d022a2635.cf0e2e825020.1253681289762507320@shytyi.net> To: Dmytro Shytyi X-Mailer: Apple Mail (2.3445.9.1) Archived-At: Subject: Re: [netmod] New Version draft-shytyi-netmod-vysm-02.txt as Working Group document. X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 05 Sep 2019 18:27:17 -0000 --Apple-Mail=_309C4C25-54BF-49EB-ABBC-63521627BB2A Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii I find the representation of a service model in this draft for a uCPE as = too simple. In reality, on a uCPE, you could be running a Network = Service (NS), which is composed of multiple VNFs interconnected = together. This service model does not address such a configuration. = Besides, how is the configuration of a uCPE device for a VNF different = from configuration of a VNF in a provider Network Function = Virtualization Infrastructure (NFVI) like OpenStack or VMware VIO? And = would you not need to enable the service on the provider side to make = the services running on the uCPE functional? There is significant amount of work that has been done in ETSI on the = configuration and management of VNF and NS. Authors should spend some = time going through the specifications specified by ETSI to make sure = they are not re-specifying work that has been done there, and instead = see how they could augment the work that has already been defined. Authors can start by going through IFA010 = , = IFA011 = , IFA014 = , and its YANG specification in SOL006 = . Cheers. > On Sep 5, 2019, at 9:02 AM, Dmytro Shytyi = wrote: >=20 > Dear All, >=20 > Please find the updated version of the VYSM Internet Draft(v0.2). > The new version of draft introduces an extension of the yang model = defined in previous version. =46rom now the VYSM supports (0day = configuration)/(bootstrap) of the VNFs hosted in the uCPE. > With 0day configuration in the uCPE we can setup minimal required = configuration of vRouter (such as ip address, hostname,etc..), SD-WAN = (address of the SD-WAN manager, dhcp activation, etc..), etc.. >=20 >=20 > Details: > A new version of I-D, draft-shytyi-netmod-vysm-02.txt=20 > has been successfully submitted by Dmytro Shytyi and posted to the=20 > IETF repository.=20 >=20 > Name: draft-shytyi-netmod-vysm=20 > Revision: 02=20 > Title: Virtualization YANG Servise Model (VYSM)=20 > Document date: 2019-09-04=20 > Group: Individual Submission=20 > Pages: 10=20 > URL: = https://www.ietf.org/internet-drafts/draft-shytyi-netmod-vysm-02.txt = =20= > Status: https://datatracker.ietf.org/doc/draft-shytyi-netmod-vysm/ = =20 > Htmlized: https://tools.ietf.org/html/draft-shytyi-netmod-vysm-02 = =20 > Htmlized: = https://datatracker.ietf.org/doc/html/draft-shytyi-netmod-vysm = =20 > Diff: https://www.ietf.org/rfcdiff?url2=3Ddraft-shytyi-netmod-vysm-02 = =20 >=20 > Abstract:=20 > This document provides a specification of the Virtual Network=20 > Functions YANG Service Model (VYSM). The VNF YANG Service Model=20 > serves as a base framework for managing an universal Customer-=20 > Premises Equipment (uCPE) NFV subsystem from the Orchestrator.=20 > =20 > >> > >># # # : Dmytro Shytyi [mailto:ietf.dmytro@shytyi.net = ] > >># # # # : 2019# 8# 28# 21:46 > >># # # : Robert Varga >; Qin Wu = > > >># # : netmod > > >># # : Re: [netmod] New Version draft-shytyi-netmod-vysm-02.txt as = Working Group document. > >> > >>Hello, > >> > >>Please find comments inline. > >>>On 27/08/2019 18:03, Dmytro Shytyi wrote: > >>>> Dear All, > >>>>=20 > >>>> I am one of the authors of ID VYSM and I would like to draw your > >>>> attention to the evolution of the > >>>> draft = https://www.ietf.org/internet-drafts/draft-shytyi-netmod-vysm-01.txt = . > >>>> Recently we produced (but did not submitted yet) a new version of = ID > >>>> (02) and I beleive it fits the netmod working group. > >>>>=20 > >>>> We would be gratefull if you could suggest if the new version(02) = of the > >>>> document could become an official work item of the WG? > >>>> If yes, could you please indicate which modifications must = be done > >>>> in the document before submition. > >>>=20 > >>>Hmm, looking over the model, it would seem there is quite a bit of > >>>overlap with RFC8345 -- to the point I believe the model could be > >>>formulated in terms of RFC8345 specialization: > >>First of all I would like to thank you for this comment.=20 > >>-Dmytro > >>>virtualization -> networks/network > >>>=20 > >>>device/links/interfaces/switches/vms are probably a mix of > >>>node/termmination-point/link extensions with conjunction with > >>>supporting-{topology,node,link}. > >>I can imagine mapping: > >>virtualization (ID) -> networks/network (RFC 8345) > >>links (ID)- >link;(RFC 8345) > >>ports (ID)-> termination points;(RFC 8345) > >>But still.. it seems here we have to create extension of the model = proposed in RFC 8345. > >>Precisely for node (RFC 8345) we may add types (switches, vms) and = futer add leafs /listsfor type if required (ex: #RAM,#vCPUs and other = leafs for VMs) > >>-Dmytro > >>>How would the draft relate to RFC8345? Should it perhaps call out = it is > >>>a different take on the similar problem, specialized to a = particular > >>>use-case? > >>One can suggest that in the RFC8345 Figure 1, the block "service = Topology model" can include the proposed in the draft network service = descriptor with appropriate modification of mapping according to the = RFC8345.. > >> > >>Meanwhile I find that the proposed solution(ID) try to solve the = problem descibed below: > >> > >>The uCPE management mechanism may involve not only YANG modules but = also the speficif logic written in programming languages. The proposed = organisation of yang model is an attempt to find the best fit for = combination (YANG modules + specific logic written in python for example = ) to manage different existing NFVIs in the uCPE (by the orchestrator). > >> > >>In the case of uCPE, the mapping (w/wo additinal logic) of = "variables " between service yang modules (in the orchestrator) and = NETCONF payload(that is sent to the uCPE) will be more complex (requires = additional transformations in the logic) with generic approach, then the = solution presented in the ID, that is tailored to the uCPE.=20 > >> > >>Therefore I find the proposed solution as a stadalone generic = approach to manage multiple vendor uCPE that appears to be a particular = case tailored for uCPE NFVIs that may be not nesseraly follows RFC8345. = I would be pleased if you could comment this. > >> > >>-Dmytro > >>>Regards, > >>>Robert (with RFC8345 co-author hat on) > >>>+1, in addition, I am wondering whether this is something related = to overlay topology model, if yes, how it is different from DC Fabric = topology model defined in RFC8542?=20 > >>>-Qin=20 > >>Thank you for your comment. The RFC8542 condisers PODs in the DC = network. uCPE is located on the customer site. if we consider that uCPE = is A POD (with links and nodes like VMs and swithces) then in the = RFC8542 describes different PODs in the network that are interconnected = with links. The yang model proposed in the ID ifocuses only on the uCPE = interiour network service, not the interconnection between the uCPEs. = Aslo, I explained the difference about extension neded for type of = nodes,vms leafs and furter complexity in the mapping logic in the = reponce to Robert. > >>-Dmytro > >> > >>[Qin]:So you focus on interconnection between local vPE and remote = vPE? > >[Dmytro]: > >Thank you for this question. It seems that the next version of draft = should include the explanation of the uCPE interiour network service. > >Example: We can have multiple VMs instantiated in the uCPE = (vFW,vRouter/vCPE,SD-WAN). With support of links and swithes VMs may = create a service chains. > >Example of service chains: > >1)WAN--vRouter(vCPE)-link-uCPEvSW -link2-vFirewall-LAN > >2)WAN--SDWAN--vFirewall--LAN > >>It is not clear whether we should distinguish VM from switch. In my = understanding, Upon VNF is instantiated, there is no difference between = virtual and physical worlds. > >[Dmytro]: > >The VM/VNF in the uCPE could be a vROuter or Vfirewall or an SD-WAN = that is not a default part of virtual network resources of the uCPE = (chapter 3 in the ID). > >The switch (ex. Open vSwith) in the uCPE is a default part of uCPE = network virtual resources (chapter 3 in the ID). > >Thus we need to distingish swithes and VNFs to not to mix uCPE = network virtual resources and VNFs. > >Another reason why the destingishing is required: because VM and SW = have different device-attributes. SW does not require VNFD attributtes. > >If we do not distinguish nodes, and only extend the grouping "device = attributes" for required attributes the switch will have the properties = that are unused leafs which represent the VM-device-attributes. > >>VNF lifecycle management is separated from topology construction, = wrong? > >[Dmytro]: > >a) In case of the NFVIs uCPE the same High Level interface allows to = configure both topology construction and VM lifecycle management in the = same transaction. > >b) We can not activate Network Service Descriptor without consituent = VM node information. At the moment of NSD activation we already have to = set the VM node information such as VM capabilities that can be created = (previosly)/(at the moment of configuration of NSD) but have to be a = part of the network service descriptor at the moment of activation. > >[Dmytro] > >The Internet Draft also defines the term uCPE that is not defined at = IETF yet. > >_______________________________________________ > >netmod mailing list > >netmod@ietf.org > >https://www.ietf.org/mailman/listinfo/netmod = >=20 > ______________ > Dmytro SHYTYI >=20 >=20 >=20 >=20 > _______________________________________________ > netmod mailing list > netmod@ietf.org > https://www.ietf.org/mailman/listinfo/netmod Mahesh Jethanandani mjethanandani@gmail.com --Apple-Mail=_309C4C25-54BF-49EB-ABBC-63521627BB2A Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=us-ascii I = find the representation of a service model in this draft for a uCPE as = too simple. In reality, on a uCPE, you could be running a Network = Service (NS), which is composed of multiple VNFs interconnected = together. This service model does not address such a configuration. = Besides, how is the configuration of a uCPE device for a VNF different = from configuration of a VNF in a provider Network Function = Virtualization Infrastructure (NFVI) like OpenStack or VMware VIO? And = would you not need to enable the service on the provider side to make = the services running on the uCPE functional?

There is significant amount of work = that has been done in ETSI on the configuration and management of VNF = and NS. Authors should spend some time going through the specifications = specified by ETSI to make sure they are not re-specifying work that has = been done there, and instead see how they could augment the work that = has already been defined.

Authors can start by going through IFA010,  IFA011, IFA014, and its YANG = specification in SOL006.

Cheers.

On Sep 5, 2019, at 9:02 AM, Dmytro Shytyi <ietf.dmytro@shytyi.net> wrote:

Dear All,

Please find the updated version of the = VYSM Internet Draft(v0.2).
The new = version of draft introduces an extension of the yang model defined in = previous version. =46rom now the VYSM supports (0day = configuration)/(bootstrap) of the VNFs hosted in the uCPE.
With 0day configuration in the uCPE we = can setup minimal required configuration of vRouter (such as ip address, = hostname,etc..), SD-WAN (address of the SD-WAN manager, dhcp activation, = etc..), etc..


Details:
A= new version of I-D, draft-shytyi-netmod-vysm-02.txt 
has been successfully submitted = by Dmytro Shytyi and posted to the 
IETF repository. 

Name:       &n= bsp;draft-shytyi-netmod-vysm 
Revision:    02 
Title:       &= nbsp;Virtualization YANG Servise Model (VYSM) 
Document = date:    2019-09-04 
Group:       &= nbsp;Individual Submission 
Pages:       &= nbsp;10 
URL: https://www.ietf.org/internet-drafts/draft-shytyi-netmod-vysm-0= 2.txt 
Status: https://datatracker.ietf.org/doc/draft-shytyi-netmod-vysm/<= span class=3D""> 
Htmlized: https://tools.ietf.org/html/draft-shytyi-netmod-vysm-02 
Htmlized: https://datatracker.ietf.org/doc/html/draft-shytyi-netmod-vysm<= /a> 
Diff: https://www.ietf.org/rfcdiff?url2=3Ddraft-shytyi-netmod-vysm-02=  

Abstract: 
This document provides a = specification of the Virtual Network 
Functions YANG Service Model = (VYSM). The VNF YANG Service Model 
serves as a base framework for = managing an universal Customer- 
Premises Equipment (uCPE) NFV = subsystem from the Orchestrator. 
 
>>
>># # # : = Dmytro Shytyi [mailto:ietf.dmytro@shytyi.net]
>># # # # : 2019# 8# 28#  21:46
>># # # : Robert Varga <nite@hq.sk>; Qin Wu <bill.wu@huawei.com>
>># # : netmod <netmod@ietf.org>
>># # : Re: [netmod] New Version = draft-shytyi-netmod-vysm-02.txt as Working Group document.
>>
>>Hello,
>>
>>Please find comments inline.
>>>On 27/08/2019 18:03, Dmytro = Shytyi wrote:
>>>> Dear = All,
>>>> 
>>>> I am one of the = authors of ID VYSM and I would like to draw your
>>>> attention to the evolution of the
>>>> draft https://www.ietf.org/internet-drafts/draft-shytyi-netmod-vysm-0= 1.txt.
>>>> Recently = we produced (but did not submitted yet) a new version of ID
>>>> (02) and I beleive it = fits the netmod working group.
>>>> 
>>>> We would be gratefull if you could suggest = if the new version(02) of the
>>>> document  could become an official work = item of the WG?
>>>> =       If yes, could you please indicate which = modifications must be done
>>>> in the document before submition.
>>> 
>>>Hmm, looking over the = model, it would seem there is quite a bit of
>>>overlap with RFC8345 -- to the point I believe = the model could be
>>>formulated in terms of RFC8345 specialization:
>>First of all I would like to = thank you for this comment. 
>>-Dmytro
>>>virtualization -> networks/network
>>> 
>>>device/links/interfaces/switches/vms are probably = a mix of
>>>node/termmination-point/link extensions with = conjunction with
>>>supporting-{topology,node,link}.
>>I can imagine mapping:
>>virtualization (ID) -> = networks/network (RFC 8345)
>>links (ID)- >link;(RFC 8345)
>>ports (ID)-> termination = points;(RFC 8345)
>>But = still.. it seems here we have to create extension of the model proposed = in RFC 8345.
>>Precisely for = node (RFC 8345) we may add types (switches, vms) and futer add leafs = /listsfor type if required (ex: #RAM,#vCPUs and other leafs for VMs)
>>-Dmytro
>>>How would the draft relate to RFC8345? Should it = perhaps call out it is
>>>a = different take on the similar problem, specialized to a particular
>>>use-case?
>>One can suggest that  in = the RFC8345 Figure 1, the block "service Topology model" can include the = proposed in the draft network service descriptor with appropriate = modification of mapping according to the RFC8345..
>>
>>Meanwhile I find that the proposed solution(ID) try = to solve the problem descibed below:
>>
>>The uCPE = management mechanism may involve not only YANG modules but  also = the speficif logic written in programming languages. The proposed = organisation of yang model is an attempt to find the best fit  for = combination (YANG modules + specific logic written in python for example = )  to manage different existing NFVIs in the uCPE (by the = orchestrator).
>>
>>In the case of uCPE, the = mapping (w/wo additinal logic) of "variables " between service yang = modules (in the orchestrator) and NETCONF payload(that is sent to the = uCPE) will be more complex (requires additional transformations in the = logic) with generic approach, then the solution presented in the ID, = that is tailored to the uCPE. 
>>
>>Therefore = I find the proposed solution as a stadalone generic approach to manage = multiple vendor uCPE that appears to be a particular case tailored for = uCPE NFVIs that may be not nesseraly follows RFC8345. I would be pleased = if you could comment this.
>>
>>-Dmytro
>>>Regards,
>>>Robert (with RFC8345 co-author hat on)
>>>+1, in addition, I am = wondering whether this is something related to overlay topology model, = if yes, how it is different from DC Fabric topology model defined in = RFC8542? 
>>>-Qin 
>>Thank you for your comment. The RFC8542 condisers = PODs in the DC network. uCPE is located on the customer site. if we = consider that uCPE is A POD (with links and nodes like VMs and swithces) = then in the RFC8542 describes different PODs in the network that are = interconnected with links. The yang model proposed in the ID ifocuses = only on the uCPE interiour network service, not the interconnection = between the uCPEs. Aslo, I explained the difference about extension = neded for type of nodes,vms leafs and furter complexity in the mapping = logic in the reponce to Robert.
>>-Dmytro
>>
>>[Qin]:So you focus on = interconnection between local vPE and remote vPE?
>[Dmytro]:
>Thank = you for this question. It seems that the next version of draft should = include the explanation of the uCPE interiour network service.
>Example: We can have multiple VMs = instantiated in the uCPE (vFW,vRouter/vCPE,SD-WAN). With support of = links and swithes  VMs may create a service chains.
>Example of service chains:
>1)WAN--vRouter(vCPE)-link-uCPEvSW = -link2-vFirewall-LAN
>2)WAN--SDWAN--vFirewall--LAN
>>It is not clear whether we should distinguish VM from = switch. In my understanding, Upon VNF is instantiated, there is no = difference between virtual and physical worlds.
>[Dmytro]:
>The = VM/VNF in the uCPE could be a vROuter or Vfirewall or an SD-WAN that is = not a default part of virtual network resources of the uCPE (chapter 3 = in the ID).
>The switch (ex. Open = vSwith) in the uCPE is a default part of uCPE network virtual resources = (chapter 3 in the ID).
>Thus we = need to distingish swithes and VNFs to not to mix uCPE network virtual = resources and VNFs.
>Another = reason why the destingishing is required: because VM and SW have = different device-attributes. SW does not require VNFD attributtes.
>If we do not distinguish nodes, and = only extend the grouping "device attributes" for required attributes the = switch will have the properties that are  unused leafs which = represent the VM-device-attributes.
>>VNF lifecycle management is separated from topology = construction, wrong?
>[Dmytro]:
>a) In case of the NFVIs uCPE the = same High Level interface allows to configure both topology construction = and VM lifecycle management in the same transaction.
>b) We can not activate Network = Service Descriptor without consituent VM node information. At the moment = of NSD activation we already have to set the VM node information such as = VM capabilities that can be created (previosly)/(at the moment of = configuration of NSD) but have to be a part of the network service = descriptor at the moment of activation.
>[Dmytro]
>The = Internet Draft also defines the term uCPE that is not defined at IETF = yet.
>_______________________________________________
>netmod mailing list
>netmod@ietf.org
>https://www.ietf.org/mailman/listinfo/netmod

______________
Dmytro SHYTYI



_______________________________________________
netmod mailing list
netmod@ietf.org
https://www.ietf.org/mailman/listinfo/netmod

Mahesh Jethanandani
mjethanandani@gmail.com



= --Apple-Mail=_309C4C25-54BF-49EB-ABBC-63521627BB2A-- From nobody Thu Sep 5 12:13:51 2019 Return-Path: X-Original-To: netmod@ietfa.amsl.com Delivered-To: netmod@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 72222120B1B for ; Thu, 5 Sep 2019 12:13:49 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -6.998 X-Spam-Level: X-Spam-Status: No, score=-6.998 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_HI=-5, SPF_HELO_NONE=0.001, SPF_NONE=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1024-bit key) header.d=nic.cz Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id FTj_M69jM1hZ for ; Thu, 5 Sep 2019 12:13:47 -0700 (PDT) Received: from mail.nic.cz (mail.nic.cz [217.31.204.67]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 066F51200C3 for ; Thu, 5 Sep 2019 12:13:47 -0700 (PDT) Received: from birdie (unknown [IPv6:2a01:5e0:29:ffff:ffc6:c393:cdb9:8db1]) by mail.nic.cz (Postfix) with ESMTPSA id 1F702140DBF; Thu, 5 Sep 2019 21:13:45 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=nic.cz; s=default; t=1567710825; bh=5QoLc8VNyYHh48227mTYuzUMCnp+ucXDkOOBO41Nz8M=; h=From:To:Date; b=Kae8Je+Bbkvibh/oQohjJ0d+3qs7pU+Gah+yMrOG7EjSNRhMJaz6WdZ6+VVOxWoKE aTVl0UVJbw4OW2FaF4vrIrZt6fYfl49bf9l2DDm83e2oQR/X6Hxc/OmAiXc2xHSz6J FXWPtzDPkPyhMYG/XKsE9lo2kAAJ3ydYhwWkrpUg= Message-ID: <87df7364ee4b04dcb8ed482a576e3f2b67808fc0.camel@nic.cz> From: Ladislav Lhotka To: Kent Watsen Cc: "netmod@ietf.org" Date: Thu, 05 Sep 2019 21:13:44 +0200 In-Reply-To: <0100016d01f89905-2d99967e-a660-4ae2-a0a3-1fd270ad4a07-000000@email.amazonses.com> References: <156762337738.22782.18440951708689230098.idtracker@ietfa.amsl.com> <0100016d01f89905-2d99967e-a660-4ae2-a0a3-1fd270ad4a07-000000@email.amazonses.com> Organization: CZ.NIC Content-Type: text/plain; charset="UTF-8" User-Agent: Evolution 3.32.4 MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Virus-Scanned: clamav-milter 0.100.3 at mail.nic.cz X-Virus-Status: Clean Archived-At: Subject: Re: [netmod] Alissa Cooper's Abstain on draft-ietf-netmod-artwork-folding-09: (with COMMENT) X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 05 Sep 2019 19:13:50 -0000 On Thu, 2019-09-05 at 15:08 +0000, Kent Watsen wrote: > > > > > There has been discussion about how embedding YANG models in RFCs seems > > > like a > > > poor fit for a number of reasons. By standardizing line-folding mechanisms > > > and > > > claiming them as a best practice, this document reinforces the root of > > > that > > > problem rather than trying to fix it. > > > > Well said, I agree with Alissa's conclusion. > > Assuming 'a', yes, 'b' follows 'a'. That said, the concern is nebulous > and how to address it more so. Proposals? First, one can ask whether it is a good idea to have RFCs as the authoritative source of YANG modules. I don't think so. Otherwise, if the practice of including YANG modules in RFCs continues, I would suggest to include YANG modules unchanged in xml2rfc and leave the presentation issues to the RFC Editor (or their tools). With the upcoming RFC format change there will be more publication formats (HTML, TXT, PDF, EPUB), so it is IMO ridiculous to modify the source code in order to suit one of them. For example, I don't want to see folded lines in HTML-formatted RFCs. > > * Initial and NBC modules go thru standard RFC publishing process (i.e., > there is still a need to publish YANG modules in RFCs). Why? The RFC could include a link to an external module resource (possibly with a hash to guarantee that the referred resource hasn't been modified). Lada > > * BC modules can skip standard publishing process but, to be an "IETF" > product (not some random fork), they would need to be released via an > IETF-owned mechanism (e.g., an Git repo) with restricted write-access. > > Thoughts? > > Kent > -- Ladislav Lhotka Head, CZ.NIC Labs PGP Key ID: 0xB8F92B08A9F76C67 From nobody Thu Sep 5 12:31:01 2019 Return-Path: X-Original-To: netmod@ietfa.amsl.com Delivered-To: netmod@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id CBB60120B43 for ; Thu, 5 Sep 2019 12:30:52 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -6.997 X-Spam-Level: X-Spam-Status: No, score=-6.997 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_HI=-5, SPF_HELO_NONE=0.001, SPF_NONE=0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1024-bit key) header.d=nic.cz Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id O6Hu2t9-shbi for ; Thu, 5 Sep 2019 12:30:48 -0700 (PDT) Received: from mail.nic.cz (mail.nic.cz [IPv6:2001:1488:800:400::400]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 40C33120B2B for ; Thu, 5 Sep 2019 12:30:48 -0700 (PDT) Received: from birdie (unknown [IPv6:2a01:5e0:29:ffff:ffc6:c393:cdb9:8db1]) by mail.nic.cz (Postfix) with ESMTPSA id 17E9A140DBF; Thu, 5 Sep 2019 21:30:46 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=nic.cz; s=default; t=1567711846; bh=UsnbDR6ppVRrKapsl5ziVHk15gqP0Ubkc6OJwH8Fwkk=; h=From:To:Date; b=s9HGb4sYoDQ67gj2dBNzzdDVS7MsI0g+gtFtqPL4r0PoqH8r0KyvKxdi8tRdGkiqH 1GSgOGxaT4Vpy+c010mmn6rONoGBHGQB8bKN6weFhAhbNqSGwFpnSa6DFbr+IklkUm 92eq8bjghXGz6VJBobFHYJZRmK62cu3QmO2iFAKU= Message-ID: <09f8edbac1e8f353bb76f4c123a19dd46907167a.camel@nic.cz> From: Ladislav Lhotka To: Martin Bjorklund , kent+ietf@watsen.net Cc: netmod@ietf.org Date: Thu, 05 Sep 2019 21:30:45 +0200 In-Reply-To: <20190905.171730.1203130976409295649.mbj@tail-f.com> References: <156762337738.22782.18440951708689230098.idtracker@ietfa.amsl.com> <0100016d01f89905-2d99967e-a660-4ae2-a0a3-1fd270ad4a07-000000@email.amazonses.com> <20190905.171730.1203130976409295649.mbj@tail-f.com> Organization: CZ.NIC Content-Type: text/plain; charset="UTF-8" User-Agent: Evolution 3.32.4 MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Virus-Scanned: clamav-milter 0.100.3 at mail.nic.cz X-Virus-Status: Clean Archived-At: Subject: Re: [netmod] Alissa Cooper's Abstain on draft-ietf-netmod-artwork-folding-09: (with COMMENT) X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 05 Sep 2019 19:31:00 -0000 On Thu, 2019-09-05 at 17:17 +0200, Martin Bjorklund wrote: > Kent Watsen wrote: > > > > > > >> There has been discussion about how embedding YANG models in RFCs seems > like a > > >> poor fit for a number of reasons. By standardizing line-folding > mechanisms and > > >> claiming them as a best practice, this document reinforces the root of > that > > >> problem rather than trying to fix it. > > > > > > Well said, I agree with Alissa's conclusion. > > But the algorithm in the document isn't supposed to be used for YANG > modules. It is supposed to be used primarily for XML and JSON > snippets (etc). My main concern is YANG, or any other code that is supposed to be both read in the RFC and extracted from it. Lada > > > Assuming 'a', yes, 'b' follows 'a'. That said, the concern is nebulous > > and how to address it more so. Proposals? > > > > Assuming the concern is process-overhead for minor spins > > I think we need to understand what the "number of reasons" Alissa > refers to really are, before we try to come up with solutions. > > > /martin > > > > , perhaps we > > could leverage the module-versioning work as follows: > > > > * Initial and NBC modules go thru standard RFC publishing process (i.e., > > there is still a need to publish YANG modules in RFCs). > > > > * BC modules can skip standard publishing process but, to be an "IETF" > > product (not some random fork), they would need to be released via an > > IETF-owned mechanism (e.g., an Git repo) with restricted write-access. > > > > Thoughts? > > > > Kent > > -- Ladislav Lhotka Head, CZ.NIC Labs PGP Key ID: 0xB8F92B08A9F76C67 From nobody Thu Sep 5 14:03:58 2019 Return-Path: X-Original-To: netmod@ietfa.amsl.com Delivered-To: netmod@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 394A1120B2B for ; Thu, 5 Sep 2019 14:03:57 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.998 X-Spam-Level: X-Spam-Status: No, score=-1.998 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1024-bit key) header.d=shytyi.net Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id wPnnJ4-hYtzX for ; Thu, 5 Sep 2019 14:03:51 -0700 (PDT) Received: from sender-of-o52.zoho.eu (sender-of-o52.zoho.eu [31.186.226.248]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 1B92A120900 for ; Thu, 5 Sep 2019 14:03:50 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1567717408; cv=none; d=zohomail.eu; s=zohoarc; b=lYZl1R8fXqvQ+z1/HEupC32/NKKLyAN97oQs8fO7757S+mnUQnzBM0XEoGGUhRHddiNnVkGcJ1KLXiUlnI2PvAmgQfuYkIEx62Q6/4XYTOgCQ2pxmWnhk+ABnrL5Ev+PrfZv+60G+VxuTSX9+7cs6wnLdj2cCbdpdsRzw5APWRA= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.eu; s=zohoarc; t=1567717408; h=Content-Type:Cc:Date:From:In-Reply-To:MIME-Version:Message-ID:References:Subject:To:ARC-Authentication-Results; bh=ccBBRGDN2C31I4MiIG/83odE9Zv/KTC26axixUOTN1k=; b=Nr4RYXWuMViIX2ha3PjS0lX0Rkv2ZE1YsCosZRvZ58ZpPihhTTE6B+/hmxOlRwwymN5hz8gUz1QnwPr2o164+HS4FS1XJHpBaUVnRuCW4lCahDd0dLGRrOyGFhAHZXWR+ZlWZ26OCbsfvqinXIMraQkgxfXZp5cBptRvQPjC8rk= ARC-Authentication-Results: i=1; mx.zohomail.eu; dkim=pass header.i=shytyi.net; spf=pass smtp.mailfrom=ietf.dmytro@shytyi.net; dmarc=pass header.from= header.from= DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; t=1567717408; s=hs; d=shytyi.net; i=ietf.dmytro@shytyi.net; h=Date:From:To:Cc:Message-Id:In-Reply-To:References:Subject:MIME-Version:Content-Type; l=58621; bh=ccBBRGDN2C31I4MiIG/83odE9Zv/KTC26axixUOTN1k=; b=e2qtnR7azoWSSCDIvK5akI2+1vUrrzfi8E47jqo07niyLdDWOvzvSOVrcJ+2/JhR 9FbSmjOr7QX6qsd9uj4dJjyFVDQoEGtDimjOG95nPodUMPmL5ATROd4K5EPrJjnvdOv WozNRiPwAS5RmvQ9U/QqtQ2O15PgZzl0l0v74nPA= Received: from sender.zoho.eu (172.26.23.79 [172.26.23.79]) by mx.zoho.eu with SMTPS id 1567717407037185.9911442481506; Thu, 5 Sep 2019 23:03:27 +0200 (CEST) Received: from mail.zoho.eu by mx.zoho.eu with SMTP id 156771740695967.11128071598455; Thu, 5 Sep 2019 23:03:26 +0200 (CEST) Date: Thu, 05 Sep 2019 23:03:26 +0200 From: Dmytro Shytyi To: "Mahesh Jethanandani" Cc: "Robert Varga" , "billwu" , "netmod" , "Diego Lopez" Message-Id: <16d033d38e7.bbb2af8a11544.6493791187744876181@shytyi.net> In-Reply-To: References: <155377227553.1573.8548464832229347361.idtracker@ietfa.amsl.com> <16caabd07ae.de4789c8151923.6368018099125205208@shytyi.net> <16cba30dec2.b91b31ed256364.8160264793634017255@shytyi.net> <16cd3d19305.11aec1852361697.7576623717058940792@shytyi.net> <5219ac80-b607-b4b4-8c77-72950d4c5137@hq.sk> <16cd8798b80.b402ce899813.5192375594519800096@shytyi.net> <16d022a2635.cf0e2e825020.1253681289762507320@shytyi.net> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_32283_1333223623.1567717406952" X-Priority: Medium User-Agent: Zoho Mail X-Mailer: Zoho Mail X-ZohoMailClient: External Archived-At: Subject: Re: [netmod] New Version draft-shytyi-netmod-vysm-02.txt as Working Group document. X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 05 Sep 2019 21:03:57 -0000 ------=_Part_32283_1333223623.1567717406952 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable [Dmytro] Hello Mahesh Jethanandani, Thank you for your comment. Please find answers inline. >I find the representation of a service model in this draft for a uCPE as t= oo simple. In reality, on a uCPE, you could be running a Network Service (N= S), which is composed of multiple VNFs interconnected together. This servic= e model does not address such a configuration. [Dmytro] This service model presented in the draft supports N VMs in the NS and addr= eses configuration with multiple VMs and switches with plenty of links. It = is well tested (with service chained VMs) on equipent from different well k= nown suppliers. The idea to have complex flexible service in the network se= rvice orchestrator for uCPE. in the yang model we have list (marked by pyang with "*") of VMs where the = key is name of the vm, thus you may define as much VM as you wish. Example of 2 VMs that are service chained (swLAN-VM1-swService-VM2-swWAN) =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 +--rw vms* [vm] =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 +--rw vm=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 string =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 +--rw ports* [port] =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 |=C2=A0 +--rw port=C2= =A0=C2=A0=C2=A0 string =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 |=C2=A0 +--rw name?=C2= =A0=C2=A0 string =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 |=C2=A0 +--rw link?=C2= =A0=C2=A0 -> ../../../links/link =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 +--rw ram?=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 string =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 +--rw cpu?=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 string =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 +--rw storages* [id] =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 |=C2=A0 +--rw id=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 string =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 |=C2=A0 +--rw location?= =C2=A0=C2=A0 string =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 +--rw day0-config =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 +--rw= location?=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 string =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 +--rw= day0-var-path?=C2=A0=C2=A0 string =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 +--rw= variable* [name] =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0 +--rw name=C2=A0=C2=A0=C2=A0=C2=A0 string =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0 +--rw value?=C2=A0=C2=A0 string So basically=C2=A0 the list "+--rw wms* [vm]" can be represented/"expanded"= in this way where the names and number ov vms(N) is set by user: =C2=A0>>>>>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 +--rw vm1=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 string =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0|=C2=A0 =C2=A0 =C2=A0+--rw ports* [port] =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0|=C2=A0 =C2=A0 =C2=A0|=C2=A0 +--rw port=C2=A0=C2=A0=C2=A0 string =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0|=C2=A0 =C2=A0 =C2=A0|=C2=A0 +--rw name?=C2=A0=C2=A0 string =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0|=C2=A0 =C2=A0 =C2=A0|=C2=A0 +--rw link?=C2=A0=C2=A0 -> ../../../= links/link =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0|=C2=A0 =C2=A0 =C2=A0+--rw ram?=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0 string =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0|=C2=A0 =C2=A0 =C2=A0+--rw cpu?=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0 string =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0|=C2=A0 =C2=A0 =C2=A0+--rw storages* [id] =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0|=C2=A0 =C2=A0 =C2=A0|=C2=A0 +--rw id=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0 string =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0|=C2=A0 =C2=A0 =C2=A0|=C2=A0 +--rw location?=C2=A0=C2=A0 string =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0|=C2=A0 =C2=A0 =C2=A0+--rw day0-config =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0|=C2=A0 =C2=A0 =C2=A0|=C2=A0 +--rw location?=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0 string =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0|=C2=A0 =C2=A0 =C2=A0|=C2=A0 +--rw day0-var-path?=C2=A0=C2=A0 str= ing =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0|=C2=A0 =C2=A0 =C2=A0|=C2=A0 +--rw variable* [name] =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0|=C2=A0 =C2=A0 =C2=A0|=C2=A0=C2=A0=C2=A0=C2=A0 +--rw name=C2=A0= =C2=A0=C2=A0=C2=A0 string =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0|=C2=A0 =C2=A0 =C2=A0|=C2=A0=C2=A0=C2=A0=C2=A0 +--rw value?=C2=A0= =C2=A0 string >>>>>=C2=A0 =C2=A0 =C2=A0 =C2=A0 +--rw vm2=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 string =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 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=C2=A0|=C2=A0 =C2=A0 =C2=A0+--rw storages* [id] =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0|=C2=A0 =C2=A0 =C2=A0|=C2=A0 =C2=A0 +--rw id=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 string =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0|=C2=A0 =C2=A0 =C2=A0|=C2=A0 +--rw location?=C2=A0=C2=A0 string =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0|=C2=A0 =C2=A0 =C2=A0+--rw day0-config =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0|=C2=A0 =C2=A0 =C2=A0|=C2=A0 =C2=A0 +--rw location?=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 string =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0|=C2=A0 =C2=A0 =C2=A0|=C2=A0 +--rw day0-var-path?=C2=A0=C2=A0 str= ing =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0|=C2=A0 =C2=A0 =C2=A0|=C2=A0 +--rw variable* [name] 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=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0+--rw value?=C2=A0=C2=A0 s= tring >Besides, how is the configuration of a uCPE device for a VNF different fro= m configuration of a VNF in a provider Network Function Virtualization Infr= astructure (NFVI) like OpenStack or VMware VIO? [Dmytro] Modern uCPE support netconf. And if you go to the YANG RFC6020 you will fin= d the next statement: =C2=A0=C2=A0 "YANG is a data modeling language used to model configuration = and =C2=A0=C2=A0 state data manipulated by the Network Configuration Protocol =C2=A0=C2=A0 (NETCONF), NETCONF remote procedure calls, and NETCONF notific= ations." When we talk about Openstack it is YAML, not YANG.=C2=A0 >And would you not need to enable the service on the provider side to make = the services running on the uCPE functional? [Dmytro] Indeed, to manage the uCPE located on the client side we need to enable the= provider side. The presented model is this actually "sits" in orchestaror = that is located on the provider side. In the draft it is mentioned that it = is "network service yang model- NSYM" that is in the orchestrator (accordin= g to the rfc8199). >There is significant amount of work that has been done in ETSI on the conf= iguration and management of VNF and NS. Authors should spend some time goin= g through the specifications specified by ETSI to make sure they are not re= -specifying work that has been done there, and instead see how they could a= ugment the work that has already been defined. [Dmytro] The uCPE management mechanism(in the service provider network service orche= strator)=C2=A0 may involve not only YANG modules but also the speficic logi= c written in programming languages. The proposed organisation of yang model= is a solution that provides the best fit for combination (YANG modules + s= pecific logic written in python for example )=C2=A0 to manage different exi= sting NFVIs in the uCPE (by the orchestrator). In the case of uCPE, the mapping (w/wo additinal logic) of "variables " bet= ween service yang modules (in the orchestrator) and NETCONF payload(that is= sent to the uCPE) will be more complex (requires additional transformation= s in the logic) with generic approach, then the solution presented in the I= D, that is tailored to the uCPE.Therefore I find the proposed solution as a= stadalone generic approach to manage multiple vendor uCPE that appears to = be a particular case tailored for uCPE NFVIs that may be not nesseraly foll= ows RFC8345. I would be pleased if you could comment this. >Authors can start by going through IFA010,=C2=A0 IFA011, IFA014, and its Y= ANG specification in SOL006. [Dmytro] I would like to draw your attention that these documents seems to be direct= ed to the generic solution including also cloud environment, that brings a = lot of complexity. There is some difference between cloud and client site. For example, case for VNFD, in the cloud we need to have flavours, differen= t VDUs For VNFD, to change the VM capacities according to the load as we ha= ve the extendible infrastructure. The ucpe has limited resources, not as a cloud infrastructure in the data c= enter. For example, in the case of NSD: NSD includes the VLD that defines Virtual = Links. But in the uCPE case you may have virtual links + virtual switches t= hat are not part of the NSD defined in the ETSI. For example, i'm not avare of VNFD that brings option of (0day configuratio= n)/bootstrap for VNF. Moreover in the proposed model there is a possibility= to set variables that will be substituted in the ".iso" bootstrap image (e= x.cloudinit) that is assigned to the VM in the uCPE. Thus the generic solution of ETSI leads to more complex implementations of = the code that is responsible for mapping between YANG/XML when the solution= proposed in the Inernet Draft is tailored to the uCPE use-case and should = bring the simplisity when developping the mapping logic and inroduce featur= es that are not presented by ETSI. The Internet Draft also defines the term uCPE that is not defined at IETF y= et. >>On Sep 5, 2019, at 9:02 AM, Dmytro Shytyi = wrote: >>Dear All, >>Please find the updated version of the VYSM Internet Draft(v0.2). >>The new version of draft introduces an extension of the yang model define= d in previous version. From now the VYSM supports (0day configuration)/(boo= tstrap) of the VNFs hosted in the uCPE. >>With 0day configuration in the uCPE we can setup minimal required configu= ration of vRouter (such as ip address, hostname,etc..), SD-WAN (address of = the SD-WAN manager, dhcp activation, etc..), etc.. >>Details: >>A new version of I-D, draft-shytyi-netmod-vysm-02.txt\A0 >>has been successfully submitted by Dmytro Shytyi and posted to the\A0 >>IETF repository.\A0 >>Name:\A0\A0\A0\A0\A0\A0\A0\A0draft-shytyi-netmod-vysm\A0 >>Revision:\A0\A0\A0\A002\A0 >>Title:\A0\A0\A0\A0\A0\A0\A0\A0Virtualization YANG Servise Model (VYSM)\A0 >>Document date:\A0\A0\A0\A02019-09-04\A0 >>Group:\A0\A0\A0\A0\A0\A0\A0\A0Individual Submission\A0 >>Pages:\A0\A0\A0\A0\A0\A0\A0\A010\A0 >>URL: https://www.ietf.org/internet-drafts/draft-shytyi-netmod-vysm-02.txt= \A0 >>Status: https://datatracker.ietf.org/doc/draft-shytyi-netmod-vysm/\A0 >>Htmlized: https://tools.ietf.org/html/draft-shytyi-netmod-vysm-02\A0 >>Htmlized: https://datatracker.ietf.org/doc/html/draft-shytyi-netmod-vysm\= A0 >>Diff: https://www.ietf.org/rfcdiff?url2=3Ddraft-shytyi-netmod-vysm-02\A0 >>Abstract:\A0 >> >>This document provides a specification of the Virtual Network\A0 >> >>Functions YANG Service Model (VYSM). The VNF YANG Service Model\A0 >> >>serves as a base framework for managing an universal Customer-\A0 >> >>Premises Equipment (uCPE) NFV subsystem from the Orchestrator.\A0 >>>> >>>># # # : Dmytro Shytyi [mailto:mailto:ietf.dmytro@shytyi.net] >>>># # # # : 2019# 8# 28#\A0 21:46 >>>># # # : Robert Varga ; Qin Wu >>>># # : netmod >>>># # : Re: [netmod] New Version draft-shytyi-netmod-vysm-02.txt as Worki= ng Group document. >>>> >>>>Hello, >>>> >>>>Please find comments inline. >>>>>On 27/08/2019 18:03, Dmytro Shytyi wrote: >>>>>> Dear All, >>>>>>\A0 >>>>>> I am one of the authors of ID VYSM and I would like to draw your >>>>>> attention to the evolution of the >>>>>> draft\A0https://http://www.ietf.org/internet-drafts/draft-shytyi-net= mod-vysm-01.txt. >>>>>> Recently we produced (but did not submitted yet) a new version of ID >>>>>> (02) and I beleive it fits the netmod working group. >>>>>>\A0 >>>>>> We would be gratefull if you could suggest if the new version(02) of= the >>>>>> document\A0 could become an official work item of the WG? >>>>>> \A0 \A0 \A0 If yes, could you please indicate which modifications mu= st be done >>>>>> in the document before submition. >>>>>\A0 >>>>>Hmm, looking over the model, it would seem there is quite a bit of >>>>>overlap with RFC8345 -- to the point I believe the model could be >>>>>formulated in terms of RFC8345 specialization: >>>>First of all I would like to thank you for this comment.\A0 >>>>-Dmytro >>>>>virtualization -> networks/network >>>>>\A0 >>>>>device/links/interfaces/switches/vms are probably a mix of >>>>>node/termmination-point/link extensions with conjunction with >>>>>supporting-{topology,node,link}. >>>>I can imagine mapping: >>>>virtualization (ID) -> networks/network (RFC 8345) >>>>links (ID)- >link;(RFC 8345) >>>>ports (ID)-> termination points;(RFC 8345) >>>>But still.. it seems here we have to create extension of the model prop= osed in RFC 8345. >>>>Precisely for node (RFC 8345) we may add types (switches, vms) and fute= r add leafs /listsfor type if required (ex: #RAM,#vCPUs and other leafs for= VMs) >>>>-Dmytro >>>>>How would the draft relate to RFC8345? Should it perhaps call out it i= s >>>>>a different take on the similar problem, specialized to a particular >>>>>use-case? >>>>One can suggest that\A0 in the RFC8345 Figure 1, the block "service Top= ology model" can include the proposed in the draft network service descript= or with appropriate modification of mapping according to the RFC8345.. >>>> >>>>Meanwhile I find that the proposed solution(ID) try to solve the proble= m descibed below: >>>> >>>>The uCPE management mechanism may involve not only YANG modules but\A0 = also the speficif logic written in programming languages. The proposed orga= nisation of yang model is an attempt to find the best fit\A0 for combinatio= n (YANG modules + specific logic written in python for example )\A0 to mana= ge different existing NFVIs in the uCPE (by the orchestrator). >>>> >>>>In the case of uCPE, the mapping (w/wo additinal logic) of "variables "= between service yang modules (in the orchestrator) and NETCONF payload(tha= t is sent to the uCPE) will be more complex (requires additional transforma= tions in the logic) with generic approach, then the solution presented in t= he ID, that is tailored to the uCPE.\A0 >>>> >>>>Therefore I find the proposed solution as a stadalone generic approach = to manage multiple vendor uCPE that appears to be a particular case tailore= d for uCPE NFVIs that may be not nesseraly follows RFC8345. I would be plea= sed if you could comment this. >>>> >>>>-Dmytro >>>>>Regards, >>>>>Robert (with RFC8345 co-author hat on) >>>>>+1, in addition, I am wondering whether this is something related to o= verlay topology model, if yes, how it is different from DC Fabric topology = model defined in RFC8542?\A0 >>>>>-Qin\A0 >>>>Thank you for your comment. The RFC8542 condisers PODs in the DC networ= k. uCPE is located on the customer site. if we consider that uCPE is A POD = (with links and nodes like VMs and swithces) then in the RFC8542 describes = different PODs in the network that are interconnected with links. The yang = model proposed in the ID ifocuses only on the uCPE interiour network servic= e, not the interconnection between the uCPEs. Aslo, I explained the differe= nce about extension neded for type of nodes,vms leafs and furter complexity= in the mapping logic in the reponce to Robert. >>>>-Dmytro >>>> >>>>[Qin]:So you focus on interconnection between local vPE and remote vPE? >>>[Dmytro]: >>>Thank you for this question. It seems that the next version of draft sho= uld include the explanation of the uCPE interiour network service. >>>Example: We can have multiple VMs instantiated in the uCPE (vFW,vRouter/= vCPE,SD-WAN). With support of links and swithes\A0 VMs may create a service= chains. >>>Example of service chains: >>>1)WAN--vRouter(vCPE)-link-uCPEvSW -link2-vFirewall-LAN >>>2)WAN--SDWAN--vFirewall--LAN >>>>It is not clear whether we should distinguish VM from switch. In my und= erstanding, Upon VNF is instantiated, there is no difference between virtua= l and physical worlds. >>>[Dmytro]: >>>The VM/VNF in the uCPE could be a vROuter or Vfirewall or an SD-WAN that= is not a default part of virtual network resources of the uCPE (chapter 3 = in the ID). >>>The switch (ex. Open vSwith) in the uCPE is a default part of uCPE netwo= rk virtual resources (chapter 3 in the ID). >>>Thus we need to distingish swithes and VNFs to not to mix uCPE network v= irtual resources and VNFs. >>>Another reason why the destingishing is required: because VM and SW have= different device-attributes. SW does not require VNFD attributtes. >>>If we do not distinguish nodes, and only extend the grouping "device att= ributes" for required attributes the switch will have the properties that a= re\A0 unused leafs which represent the VM-device-attributes. >>>>VNF lifecycle management is separated from topology construction, wrong= ? >>>[Dmytro]: >>>a) In case of the NFVIs uCPE the same High Level interface allows to con= figure both topology construction and VM lifecycle management in the same t= ransaction. >>>b) We can not activate Network Service Descriptor without consituent VM = node information. At the moment of NSD activation we already have to set th= e VM node information such as VM capabilities that can be created (previosl= y)/(at the moment of configuration of NSD) but have to be a part of the net= work service descriptor at the moment of activation. >>>[Dmytro] >>>The Internet Draft also defines the term uCPE that is not defined at IET= F yet. >>>_______________________________________________ >>>netmod mailing list >>>mailto:netmod@ietf.org >>>https://www.ietf.org/mailman/listinfo/netmod >> ------=_Part_32283_1333223623.1567717406952 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable =
[Dmytro]
Hello Mahesh Jethanandani,
<= /div>
Thank you for your comment.
Please find answers inl= ine.

>I find the representation of a service mo= del in this draft for a uCPE as too simple. In reality, on a uCPE, you coul= d be running a Network Service (NS), which is composed of multiple VNFs int= erconnected together. This service model does not address such a configurat= ion.
[Dmytro]
This service model presented in the draft supports N VMs in the= NS and addreses configuration with multiple VMs and switches with plenty o= f links. It is well tested (with service chained VMs) on equipent from diff= erent well known suppliers. The idea to have complex flexible service in th= e network service orchestrator for uCPE.
in the yang model we= have list (marked by pyang with "*") of VMs where the key is name of the v= m, thus you may define as much VM as you wish.

Example of 2 VMs that are service chained (swLAN-VM1-swService-VM2-swWAN)<= br>

      +--rw vms* [vm]=
          =             +--rw vm=              st= ring
         &n= bsp;            +--r= w ports* [port]
       &nb= sp;            =   |  +--rw port    string
 &nbs= p;            &= nbsp;       |  +--rw name?   s= tring
         &= nbsp;            |&n= bsp; +--rw link?   -> ../../../links/link
 =             &nb= sp;        +--rw ram?   &= nbsp;       string
  =             &nb= sp;       +--rw cpu?    &= nbsp;      string
   =             &nb= sp;      +--rw storages* [id]
 =             &nb= sp;        |  +--rw id  &= nbsp;       string
  =             &nb= sp;       |  +--rw location?  = string
         = ;             += --rw day0-config
       &n= bsp;            = ;     +--rw location?     &nbs= p;  string
       &nb= sp;            =      +--rw day0-var-path?   string
<= div>            = ;             += --rw variable* [name]
      &nb= sp;            =          +--rw name  &nbs= p;  string
       &nb= sp;            =         +--rw value?   string<= br>


So basically  the list "+-= -rw wms* [vm]" can be represented/"expanded" in this way where the names an= d number ov vms(N) is set by user:

 >&= gt;>>>       +--rw vm1  &n= bsp;          string
=
                    =    |     +--rw ports* [port]
  =                      = ;|     |  +--rw port    string
=
                    =    |     |  +--rw name?   string
                  =      |     |  +--rw link?   -&= gt; ../../../links/link
          &n= bsp;            |     +--rw ra= m?           string
                  &nb= sp;    |     +--rw cpu?    &nb= sp;      string
     =                  |  &nbs= p;  +--rw storages* [id]
        &nb= sp;              |     |&= nbsp; +--rw id          string=
                &nbs= p;      |     |  +--rw location? &n= bsp; string
              =          |     +--rw day0-config
                  =      |     |  +--rw location?  = ;      string
      &= nbsp;                |   =  |  +--rw day0-var-path?   string
 =                     &nbs= p;|     |  +--rw variable* [name]
  =                      = ;|     |     +--rw name   = ;  string
            &nbs= p;          |     |  &nbs= p;  +--rw value?   string
>>>>>=         +--rw vm2      &n= bsp;      string
     = ;                  |  &nb= sp;  +--rw ports* [port]
        &nb= sp;              |     |&= nbsp; +--rw port    string
     = ;                  |  &nb= sp;  |  +--rw name?   string
   = ;                    |&nb= sp;    |  +--rw link?   -> ../../../links/link<= br>
                 = ;      |     +--rw ram?   &nbs= p;       string
    &= nbsp;                  | =    +--rw cpu?        &nb= sp;  string
            &n= bsp;          |     +--rw storages*= [id]
               =        |     |    +--rw id&nb= sp;         string
&n= bsp;                     =  |     |  +--rw location?   string
                  &nb= sp;    |     +--rw day0-config
 = ;                     &nb= sp;|     |    +--rw location?   &nb= sp;    string
        &nbs= p;              |     |&n= bsp; +--rw day0-var-path?   string
    &n= bsp;                  |  =    |  +--rw variable* [name]
    &nb= sp;                  |  &= nbsp;  |     +--rw name     st= ring
                =        |     |     += --rw value?   string
     =             &nb= sp;      ....
    &nb= sp;                 |    =                   
 >>>>>       +--r= w vmN           &nbs= p; string
        &nb= sp;            =       +--rw ports* [port]
&nbs= p;            &= nbsp;            &nb= sp; |  +--rw port    string
 &n= bsp;            = ;             &= nbsp;|  +--rw name?   string
   = ;            &n= bsp;            |&nb= sp; +--rw link?   -> ../../../links/link
 &= nbsp;           &nbs= p;             =  +--rw ram?          = ; string
        &nbs= p;             =       +--rw cpu?     = ;      string
   &nbs= p;            &= nbsp;           +--rw sto= rages* [id]
        &= nbsp;           &nbs= p;       |  +--rw id   &n= bsp;      string
   &= nbsp;           &nbs= p;            | = ; +--rw location?   string
    =             &nb= sp;           +--rw day0-= config
         =             &nb= sp;         +--rw location? &n= bsp;      string
   &= nbsp;           &nbs= p;            &= nbsp;  +--rw day0-var-path?   string
 &nb= sp;            =             &nb= sp;    +--rw variable* [name]
  &nbs= p;            &= nbsp;            &nb= sp;     +--rw name     string<= br>
          &= nbsp;           &nbs= p;           +--rw value?=    string

>Besides, how is the co= nfiguration of a uCPE device for a VNF different from configuration of a VN= F in a provider Network Function Virtualization Infrastructure (NFVI) like = OpenStack or VMware VIO?
[Dmytro]
Modern uCPE support netconf. And if you go = to the YANG RFC6020 you will find the next statement:
 &= nbsp; "YANG is a data modeling language used to model configuration and
=
   state data manipulated by the Network Configuration= Protocol
   (NETCONF), NETCONF remote procedure ca= lls, and NETCONF notifications."
When we talk about Openstack= it is YAML, not YANG. 

>And would you= not need to enable the service on the provider side to make the services r= unning on the uCPE functional?
[Dmytro]
Indeed,= to manage the uCPE located on the client side we need to enable the provid= er side. The presented model is this actually "sits" in orchestaror that is= located on the provider side. In the draft it is mentioned that it is "net= work service yang model- NSYM" that is in the orchestrator (according to th= e rfc8199).

>There is significant amount of= work that has been done in ETSI on the configuration and management of VNF= and NS. Authors should spend some time going through the specifications sp= ecified by ETSI to make sure they are not re-specifying work that has been = done there, and instead see how they could augment the work that has alread= y been defined.
[Dmytro]
The uCPE management mechanism(in the service provide= r network service orchestrator)  may involve not only YANG modules but= also the speficic logic written in programming languages. The proposed org= anisation of yang model is a solution that provides the best fit for combin= ation (YANG modules + specific logic written in python for example )  = to manage different existing NFVIs in the uCPE (by the orchestrator).

In the case of uCPE, the mapping (w/wo additinal lo= gic) of "variables " between service yang modules (in the orchestrator) and= NETCONF payload(that is sent to the uCPE) will be more complex (requires a= dditional transformations in the logic) with generic approach, then the sol= ution presented in the ID, that is tailored to the uCPE.Therefore I find th= e proposed solution as a stadalone generic approach to manage multiple vend= or uCPE that appears to be a particular case tailored for uCPE NFVIs that m= ay be not nesseraly follows RFC8345. I would be pleased if you could commen= t this.


>Authors can start b= y going through IFA010,  IFA011, IFA014, and its YANG specification in= SOL006.
[Dmytro]
I would like to draw your attention that these documents se= ems to be directed to the generic solution including also cloud environment= , that brings a lot of complexity. There is some difference between cloud a= nd client site.
For example, case for VNFD, in the cloud we n= eed to have flavours, different VDUs For VNFD, to change the VM capacities = according to the load as we have the extendible infrastructure.
The ucpe has limited resources, not as a cloud infrastructure in the dat= a center.
For example, in the case of NSD: NSD includes the V= LD that defines Virtual Links. But in the uCPE case you may have virtual li= nks + virtual switches that are not part of the NSD defined in the ETSI.
For example, i'm not avare of VNFD that brings option of (0day = configuration)/bootstrap for VNF. Moreover in the proposed model there is a= possibility to set variables that will be substituted in the ".iso" bootst= rap image (ex.cloudinit) that is assigned to the VM in the uCPE.
<= div>Thus the generic solution of ETSI leads to more complex implementations= of the code that is responsible for mapping between YANG/XML when the solu= tion proposed in the Inernet Draft is tailored to the uCPE use-case and sho= uld bring the simplisity when developping the mapping logic and inroduce fe= atures that are not presented by ETSI.
The Internet Draft als= o defines the term uCPE that is not defined at IETF yet.

>>On Sep 5, 2= 019, at 9:02 AM, Dmytro Shytyi <ietf.dmytro@shytyi.net> wrote:
>= ;>Dear All,
>>Please find the updated version of the= VYSM Internet Draft(v0.2).
>>The new version of draft = introduces an extension of the yang model defined in previous version. From= now the VYSM supports (0day configuration)/(bootstrap) of the VNFs hosted = in the uCPE.
>>With 0day configuration in the uCPE we c= an setup minimal required configuration of vRouter (such as ip address, hos= tname,etc..), SD-WAN (address of the SD-WAN manager, dhcp activation, etc..= ), etc..
>>Details:
>>A new version= of I-D, draft-shytyi-netmod-vysm-02.txt\A0
>>has been = successfully submitted by Dmytro Shytyi and posted to the\A0
= >>IETF repository.\A0
>>Name:\A0\A0\A0\A0\A0\A0\A= 0\A0draft-shytyi-netmod-vysm\A0
>>Revision:\A0\A0\A0\A0= 02\A0
>>Title:\A0\A0\A0\A0\A0\A0\A0\A0Virtualization YA= NG Servise Model (VYSM)\A0
>>Document date:\A0\A0\A0\A0= 2019-09-04\A0
>>Group:\A0\A0\A0\A0\A0\A0\A0\A0Individua= l Submission\A0
>>Pages:\A0\A0\A0\A0\A0\A0\A0\A010\A0
>>Diff: = https://www.ietf.org/rfcdiff?url2=3Ddraft-shytyi-netmod-vysm-02\A0
<= /div>
>>Abstract:\A0
>>
>>= ;This document provides a specification of the Virtual Network\A0
=
>>
>>Functions YANG Service Model (VYSM). Th= e VNF YANG Service Model\A0
>>
>>se= rves as a base framework for managing an universal Customer-\A0
>>
>>Premises Equipment (uCPE) NFV subsystem f= rom the Orchestrator.\A0
>>>>
>&= gt;>># # # : Dmytro Shytyi [mailto:ietf.dmytro@shytyi.net]
>>= ;>># # # # : 2019# 8# 28#\A0 21:46
>>>># # = # : Robert Varga <nite@h= q.sk>; Qin Wu <bill.wu@huawei.com>
>>>># # : netmod= <netmod@ietf.org>
>>>>>> Recently we p= roduced (but did not submitted yet) a new version of ID
>&= gt;>>>> (02) and I beleive it fits the netmod working group.
>>>>>>\A0
>>>>>&= gt; We would be gratefull if you could suggest if the new version(02) of th= e
>>>>>> document\A0 could become an offici= al work item of the WG?
>>>>>> \A0 \A0 \A0 = If yes, could you please indicate which modifications must be done
>>>>>> in the document before submition.
<= div>>>>>>\A0
>>>>>Hmm, looking = over the model, it would seem there is quite a bit of
>>= ;>>>overlap with RFC8345 -- to the point I believe the model could= be
>>>>>formulated in terms of RFC8345 specia= lization:
>>>>First of all I would like to thank = you for this comment.\A0
>>>>-Dmytro
>>>>>virtualization -> networks/network
&= gt;>>>>\A0
>>>>>device/links/inter= faces/switches/vms are probably a mix of
>>>>>= node/termmination-point/link extensions with conjunction with
>>>>>supporting-{topology,node,link}.
>>= ;>>I can imagine mapping:
>>>>virtualizatio= n (ID) -> networks/network (RFC 8345)
>>>>link= s (ID)- >link;(RFC 8345)
>>>>ports (ID)-> t= ermination points;(RFC 8345)
>>>>But still.. it s= eems here we have to create extension of the model proposed in RFC 8345.
>>>>Precisely for node (RFC 8345) we may add types = (switches, vms) and futer add leafs /listsfor type if required (ex: #RAM,#v= CPUs and other leafs for VMs)
>>>>-Dmytro
>>>>>How would the draft relate to RFC8345? Should it= perhaps call out it is
>>>>>a different take = on the similar problem, specialized to a particular
>>&= gt;>>use-case?
>>>>One can suggest that\A0 = in the RFC8345 Figure 1, the block "service Topology model" can include the= proposed in the draft network service descriptor with appropriate modifica= tion of mapping according to the RFC8345..
>>>>
>>>>Meanwhile I find that the proposed solution(ID= ) try to solve the problem descibed below:
>>>>
>>>>The uCPE management mechanism may involve not = only YANG modules but\A0 also the speficif logic written in programming lan= guages. The proposed organisation of yang model is an attempt to find the b= est fit\A0 for combination (YANG modules + specific logic written in python= for example )\A0 to manage different existing NFVIs in the uCPE (by the or= chestrator).
>>>>
>>>>I= n the case of uCPE, the mapping (w/wo additinal logic) of "variables " betw= een service yang modules (in the orchestrator) and NETCONF payload(that is = sent to the uCPE) will be more complex (requires additional transformations= in the logic) with generic approach, then the solution presented in the ID= , that is tailored to the uCPE.\A0
>>>>
=
>>>>Therefore I find the proposed solution as a stadalone = generic approach to manage multiple vendor uCPE that appears to be a partic= ular case tailored for uCPE NFVIs that may be not nesseraly follows RFC8345= . I would be pleased if you could comment this.
>>>&= gt;
>>>>-Dmytro
>>>>>= ;Regards,
>>>>>Robert (with RFC8345 co-author = hat on)
>>>>>+1, in addition, I am wondering w= hether this is something related to overlay topology model, if yes, how it = is different from DC Fabric topology model defined in RFC8542?\A0
=
>>>>>-Qin\A0
>>>>Thank you fo= r your comment. The RFC8542 condisers PODs in the DC network. uCPE is locat= ed on the customer site. if we consider that uCPE is A POD (with links and = nodes like VMs and swithces) then in the RFC8542 describes different PODs i= n the network that are interconnected with links. The yang model proposed i= n the ID ifocuses only on the uCPE interiour network service, not the inter= connection between the uCPEs. Aslo, I explained the difference about extens= ion neded for type of nodes,vms leafs and furter complexity in the mapping = logic in the reponce to Robert.
>>>>-Dmytro
>>>>
>>>>[Qin]:So you focus = on interconnection between local vPE and remote vPE?
>>= >[Dmytro]:
>>>Thank you for this question. It see= ms that the next version of draft should include the explanation of the uCP= E interiour network service.
>>>Example: We can have= multiple VMs instantiated in the uCPE (vFW,vRouter/vCPE,SD-WAN). With supp= ort of links and swithes\A0 VMs may create a service chains.
= >>>Example of service chains:
>>>1)WAN--vRo= uter(vCPE)-link-uCPEvSW -link2-vFirewall-LAN
>>>2)WA= N--SDWAN--vFirewall--LAN
>>>>It is not clear whet= her we should distinguish VM from switch. In my understanding, Upon VNF is = instantiated, there is no difference between virtual and physical worlds.
>>>[Dmytro]:
>>>The VM/VNF in = the uCPE could be a vROuter or Vfirewall or an SD-WAN that is not a default= part of virtual network resources of the uCPE (chapter 3 in the ID).
>>>The switch (ex. Open vSwith) in the uCPE is a default = part of uCPE network virtual resources (chapter 3 in the ID).
>>>Thus we need to distingish swithes and VNFs to not to mix uCPE= network virtual resources and VNFs.
>>>Another reas= on why the destingishing is required: because VM and SW have different devi= ce-attributes. SW does not require VNFD attributtes.
>>= >If we do not distinguish nodes, and only extend the grouping "device at= tributes" for required attributes the switch will have the properties that = are\A0 unused leafs which represent the VM-device-attributes.
>>>>VNF lifecycle management is separated from topology constr= uction, wrong?
>>>[Dmytro]:
>>&g= t;a) In case of the NFVIs uCPE the same High Level interface allows to conf= igure both topology construction and VM lifecycle management in the same tr= ansaction.
>>>b) We can not activate Network Service= Descriptor without consituent VM node information. At the moment of NSD ac= tivation we already have to set the VM node information such as VM capabili= ties that can be created (previosly)/(at the moment of configuration of NSD= ) but have to be a part of the network service descriptor at the moment of = activation.
>>>[Dmytro]
>>>Th= e Internet Draft also defines the term uCPE that is not defined at IETF yet= .
>>>_______________________________________________=
>>>netmod mailing list
>>>netmod@ietf.org
<= /div>
------=_Part_32283_1333223623.1567717406952-- From nobody Thu Sep 5 14:47:33 2019 Return-Path: X-Original-To: netmod@ietfa.amsl.com Delivered-To: netmod@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 33C38120B52 for ; Thu, 5 Sep 2019 14:47:16 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.898 X-Spam-Level: X-Spam-Status: No, score=-1.898 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=unavailable autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=yumaworks-com.20150623.gappssmtp.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id oHEh8SsieW2i for ; Thu, 5 Sep 2019 14:47:12 -0700 (PDT) Received: from mail-lf1-x130.google.com (mail-lf1-x130.google.com [IPv6:2a00:1450:4864:20::130]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 59D72120B74 for ; Thu, 5 Sep 2019 14:47:12 -0700 (PDT) Received: by mail-lf1-x130.google.com with SMTP id r134so3252617lff.12 for ; Thu, 05 Sep 2019 14:47:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yumaworks-com.20150623.gappssmtp.com; s=20150623; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=k36gQIrCqwiUnPWJhCzk1qotSWyHOlOpm798FV4U9F0=; b=LShua06NEagu8gnsam/8J9mvRCuEH9F3bC817ch2kWDYJu0JNVzGDmFC5SVL1Ut/Sf PM2WM5vBcFdkccHzT4rOgf2/4ghC37w0olxjkf+o7oy/oFhO4QaXIJ5DRO5vwD8WAmx0 mkCUFjIx5Ikr/Q1oG9UKuG17duyQao3mgMMcpPHJDES8Hw2WO/JgXObUo93sXx17kO8f 0upnEupHwLOpknmJhD2bzkI/es5uQ2Az9c8ZE01kS2s6RQT8I/TWiWz368K0wIJxebWu bkYdijUlCnefGyIHxuYdKMefovNnDbLKs610ddL+PKAnvN9zt7j6yCgwBghKRdv1CdRX bZ0A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=k36gQIrCqwiUnPWJhCzk1qotSWyHOlOpm798FV4U9F0=; b=cHJnQvNwVa4BW4XZJjOWR4ihGGtiKQJUtWhNX4ySnuN4LO0wfm6979CHM4KyVfehnm HO/eL48ivUFjIE0WSJBy8gU2ePQcCewltwLor4iJaXCkZWDjMNVpWKHXdPKuPIh+HM5n 4PIu9g96NDe97sWrvoEQBrekjUo+oC5G3mRPsLApOPNBL2Hqtw7gTDrFKF+F4uuFtI91 vMZewxm/3GiU5iaWMEDaqrOThZorMkIrRCkBapfHxYkuzw9v+LjbJwolMBR3lURi/ceU 7Q7oTeYD6jmx/58qFUKlxqUSjqnB84WMhBNyeGMG0aBogMOmdxOLdbDtEOYy3e91A+2z mjSA== X-Gm-Message-State: APjAAAX1qJRYH++S2HwhUeZ2SZF+Ht9m7HfsiPw1hhEgLr03j6tEMGSP 88SedMRveAJtYEMyfGo99TozdIulMW1iHVE7Vc8MEdZU X-Google-Smtp-Source: APXvYqxD7UBEiChqDH7364xt2ijR+IRWgTtswwrOwFUc+vOeAjcdXWE5hCV0AeZTZcTzoK/F6Bdr/bQdvhqYJJdoKxg= X-Received: by 2002:a19:431e:: with SMTP id q30mr3890070lfa.171.1567720030439; Thu, 05 Sep 2019 14:47:10 -0700 (PDT) MIME-Version: 1.0 References: <156769446677.22608.7381486936621146842.idtracker@ietfa.amsl.com> <0100016d0265ae6e-cda03694-9b45-4d83-b1e6-461849aceb79-000000@email.amazonses.com> In-Reply-To: <0100016d0265ae6e-cda03694-9b45-4d83-b1e6-461849aceb79-000000@email.amazonses.com> From: Andy Bierman Date: Thu, 5 Sep 2019 14:46:59 -0700 Message-ID: To: Kent Watsen Cc: Suresh Krishnan , "netmod-chairs@ietf.org" , "netmod@ietf.org" , draft-ietf-netmod-artwork-folding@ietf.org, The IESG Content-Type: multipart/alternative; boundary="00000000000085a32e0591d543f3" Archived-At: Subject: Re: [netmod] Suresh Krishnan's Discuss on draft-ietf-netmod-artwork-folding-09: (with DISCUSS and COMMENT) X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 05 Sep 2019 21:47:24 -0000 --00000000000085a32e0591d543f3 Content-Type: text/plain; charset="UTF-8" On Thu, Sep 5, 2019 at 10:08 AM Kent Watsen wrote: > Hi Suresh, > > Thank you for your review. Comments below. > > Kent // as co-author > > > On Sep 5, 2019, at 10:41 AM, Suresh Krishnan via Datatracker < > noreply@ietf.org> wrote: > > Suresh Krishnan has entered the following ballot position for > draft-ietf-netmod-artwork-folding-09: 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/iesg/statement/discuss-criteria.html > for more information about IESG DISCUSS and COMMENT positions. > > > The document, along with other ballot positions, can be found here: > https://datatracker.ietf.org/doc/draft-ietf-netmod-artwork-folding/ > > > > ---------------------------------------------------------------------- > DISCUSS: > ---------------------------------------------------------------------- > > After some thought I think there are two things about this document that > make > me uncomfortable enough to ballot Discuss. > > a) Due to its home in the netmod WG it is highly likely that people > outside the > yang community have not paid enough attention to this work. Since this is > applicable to code fragments of all kinds, I think the home chosen for > this RFC > might have inadvertently limited input from the broader community. > > > Agreed. The original I-D was targeted for IAB stream. It wasn't going to > be presented in NETMOD, but did (by coercion). During the presentation I > mentioned that its applicability was more than NETMOD and that it should go > thru IAB, just like the "xml2rfc" RFCs (7749 and 7991). The working group > felt that it should stay in the WG and hence here we are. :sigh: > > It seemed self-evident that the scope of this draft did not fit the NETMOD WG charter. I assumed the work was permitted to start because (1) nobody else was willing to work on it and (2) nowhere else to put it. > > b) Given a) I think it is better that this document go forward as an > Informational document rather than a BCP so that use of this technique > becomes > optional, without the force of a BCP behind it. > > > I'm okay with this, modulo my comment to Alissa. Actually, if we only > view the RFC as specifying a format then, in my mind, it doesn't actually > contain the "best practice". FWIW, SHOULD appears only once, in a sentence > stating that folding SHOULD be automated, in a section titled "Goals". > That said, if not a BCP, then how to encourage people to use it, so that > automation works? For this reason alone, it seems that either the draft > should be a BCP or Datatracker is updated to auto-fold as needed. Perhaps > the right answer is to do Informational now and hope that Datatracker is > updated in time? > > > IMO Informational status is the only option. There is a simple solution that solves applicability: Add some text in this draft that UPDATES RFC 8407 so that only RFCs that contain YANG modules are required to use this line-wrap solution. Andy > ---------------------------------------------------------------------- > COMMENT: > ---------------------------------------------------------------------- > > I do agree with my Abstaining colleagues that this should probably not be > on > the IETF stream but I think the work is useful enough to go forward. > > > It should've been on the IAB stream. Whether it should go forward, after > having the BCP attribute removed, or re-run via the IAB stream is up to the > IESG. > > > Kent // as co-author > > > _______________________________________________ > netmod mailing list > netmod@ietf.org > https://www.ietf.org/mailman/listinfo/netmod > --00000000000085a32e0591d543f3 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable


=
On Thu, Sep 5, 2019 at 10:08 AM Kent = Watsen <kent+ietf@watsen.net> wrote:
Hi Suresh,

Thank= you for your review.=C2=A0 Comments below.

Kent /= / as co-author


=
Suresh Krishnan has entered the following ballot position for
draft-i= etf-netmod-artwork-folding-09: 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/iesg/statem= ent/discuss-criteria.html
for more information about IESG DISCUSS an= d COMMENT positions.


The document, along with other ballot posit= ions, can be found here:
https://datatracker.ietf= .org/doc/draft-ietf-netmod-artwork-folding/



------------= ----------------------------------------------------------
DISCUSS:
-= ---------------------------------------------------------------------
After some thought I think there are two things about this document that = make
me uncomfortable enough to ballot Discuss.

a) Due to its hom= e in the netmod WG it is highly likely that people outside the
yang comm= unity have not paid enough attention to this work. Since this is
applica= ble to code fragments of all kinds, I think the home chosen for this RFCmight have inadvertently limited input from the broader community.

Agreed.=C2=A0 The original I-D was= targeted for IAB stream.=C2=A0 It wasn't going to be presented in NETM= OD, but did (by coercion).=C2=A0 During the presentation I mentioned that i= ts applicability was more than NETMOD and that it should go thru IAB, just = like the "xml2rfc" RFCs (7749 and 7991).=C2=A0 The working group = felt that it should stay in the WG and hence here we are. =C2=A0:sigh:


It seeme= d self-evident that the scope of this draft did not fit the NETMOD WG chart= er.
I assumed the work was permitted to start because (1) nobody = else was willing to
work on it and (2) nowhere else to put it.
=C2=A0
<= div style=3D"overflow-wrap: break-word;">

b) Given a) I think it is better that= this document go forward as an
Informational document rather than a BCP= so that use of this technique becomes
optional, without the force of a = BCP behind it.

I'm okay= with this, modulo my comment to Alissa. =C2=A0 Actually, if we only view t= he RFC as specifying a format then, in my mind, it doesn't actually con= tain the "best practice".=C2=A0 FWIW, SHOULD appears only once, i= n a sentence stating that folding SHOULD be automated, in a section titled = "Goals".=C2=A0 That said, if not a BCP, then how to encourage peo= ple to use it, so that automation works?=C2=A0 For this reason alone, it se= ems that either the draft should be a BCP or Datatracker is updated to auto= -fold as needed.=C2=A0 Perhaps =C2=A0the right answer is to do Informationa= l now and hope that Datatracker is updated in time?



IMO Informat= ional status is the only option.
There is a simple solution that = solves applicability:

Add some text in this draft = that UPDATES RFC 8407 so that only RFCs
that contain YANG modules= are required to use this line-wrap solution.


=
Andy

<= br>
------------------------------------= ----------------------------------
COMMENT:
-------------------------= ---------------------------------------------

I do agree with my Abs= taining colleagues that this should probably not be on
the IETF stream b= ut I think the work is useful enough to go forward.

It should've been on the IAB stream.=C2=A0 Whether = it should go forward, after having the BCP attribute removed, or re-run via= the IAB stream is up to the IESG.


Kent // as co-author


_______________________________________________
netmod mailing list
netmod@ietf.org https://www.ietf.org/mailman/listinfo/netmod
--00000000000085a32e0591d543f3-- From nobody Thu Sep 5 14:52:33 2019 Return-Path: X-Original-To: netmod@ietf.org Delivered-To: netmod@ietfa.amsl.com Received: from ietfa.amsl.com (localhost [IPv6:::1]) by ietfa.amsl.com (Postfix) with ESMTP id 707A3120232; Thu, 5 Sep 2019 14:52:31 -0700 (PDT) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit From: internet-drafts@ietf.org To: Cc: netmod@ietf.org X-Test-IDTracker: no X-IETF-IDTracker: 6.100.0 Auto-Submitted: auto-generated Precedence: bulk Reply-To: netmod@ietf.org Message-ID: <156772035136.30540.7660966663278054208@ietfa.amsl.com> Date: Thu, 05 Sep 2019 14:52:31 -0700 Archived-At: Subject: [netmod] I-D Action: draft-ietf-netmod-artwork-folding-10.txt X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 05 Sep 2019 21:52:32 -0000 A New Internet-Draft is available from the on-line Internet-Drafts directories. This draft is a work item of the Network Modeling WG of the IETF. Title : Handling Long Lines in Inclusions in Internet-Drafts and RFCs Authors : Kent Watsen Adrian Farrel Qin Wu Filename : draft-ietf-netmod-artwork-folding-10.txt Pages : 30 Date : 2019-09-05 Abstract: This document defines two strategies for handling long lines in width-bounded text content. One strategy is based on the historical use of a single backslash ('\') character to indicate where line- folding has occurred, with the continuation occurring with the first non-space (' ') character on the next line. The second strategy extends the first strategy by adding a second backslash character to identify where the continuation begins and thereby able to handle cases not supported by the first strategy. Both strategies use a self-describing header enabling automated reconstitution of the original content. The IETF datatracker status page for this draft is: https://datatracker.ietf.org/doc/draft-ietf-netmod-artwork-folding/ There are also htmlized versions available at: https://tools.ietf.org/html/draft-ietf-netmod-artwork-folding-10 https://datatracker.ietf.org/doc/html/draft-ietf-netmod-artwork-folding-10 A diff from the previous version is available at: https://www.ietf.org/rfcdiff?url2=draft-ietf-netmod-artwork-folding-10 Please note that it may take a couple of minutes from the time of submission until the htmlized version and diff are available at tools.ietf.org. Internet-Drafts are also available by anonymous FTP at: ftp://ftp.ietf.org/internet-drafts/ From nobody Thu Sep 5 15:02:32 2019 Return-Path: <0100016d0372debf-16e6e132-b334-41b3-ad9c-953fd9314963-000000@amazonses.watsen.net> X-Original-To: netmod@ietfa.amsl.com Delivered-To: netmod@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id E798E120B46; Thu, 5 Sep 2019 15:02:10 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.896 X-Spam-Level: X-Spam-Status: No, score=-1.896 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_NONE=0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1024-bit key) header.d=amazonses.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id U7Pa8Mop9cOK; Thu, 5 Sep 2019 15:02:06 -0700 (PDT) Received: from a8-88.smtp-out.amazonses.com (a8-88.smtp-out.amazonses.com [54.240.8.88]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 20EC0120B75; Thu, 5 Sep 2019 15:02:04 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/simple; s=6gbrjpgwjskckoa6a5zn6fwqkn67xbtw; d=amazonses.com; t=1567720923; h=From:Message-Id:Content-Type:Mime-Version:Subject:Date:In-Reply-To:Cc:To:References:Feedback-ID; bh=+DF3d4yw7tjd+/mQjBX5sc+vjrypzQ0pRuViGJRTGLk=; b=iBfWFaltcV79FVK7B/EIlRnxR1kZDOKCCAJIUakScmVZ9QwjbFW40Fb8zLano6lB XQlZGGR4yDP0nKJR5CZoaah5z62QOLMgRa/RlzcNLdS8tp2D0Y7JiZmV2tVo3bAGAr9 tI2UGqwshJREGMYHaVf408fZZ0dHMgRlUT6FYxw0= From: Kent Watsen Message-ID: <0100016d0372debf-16e6e132-b334-41b3-ad9c-953fd9314963-000000@email.amazonses.com> Content-Type: multipart/alternative; boundary="Apple-Mail=_1EF271D6-7CC1-4FEE-A73D-3C3755F9C368" Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.11\)) Date: Thu, 5 Sep 2019 22:02:03 +0000 In-Reply-To: <156766366671.22774.7481795788724573201.idtracker@ietfa.amsl.com> Cc: The IESG , "netmod-chairs@ietf.org" , draft-ietf-netmod-artwork-folding@ietf.org, "netmod@ietf.org" To: Benjamin Kaduk References: <156766366671.22774.7481795788724573201.idtracker@ietfa.amsl.com> X-Mailer: Apple Mail (2.3445.104.11) X-SES-Outgoing: 2019.09.05-54.240.8.88 Feedback-ID: 1.us-east-1.DKmIRZFhhsBhtmFMNikgwZUWVrODEw9qVcPhqJEI2DA=:AmazonSES Archived-At: Subject: Re: [netmod] Benjamin Kaduk's Discuss on draft-ietf-netmod-artwork-folding-09: (with DISCUSS and COMMENT) X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 05 Sep 2019 22:02:18 -0000 --Apple-Mail=_1EF271D6-7CC1-4FEE-A73D-3C3755F9C368 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii Hi Ben, Thank you for your review. Comments below. Update @ = https://tools.ietf.org/html/draft-ietf-netmod-artwork-folding-10 = Kent // as co-author > On Sep 5, 2019, at 2:07 AM, Benjamin Kaduk via Datatracker = wrote: >=20 > Benjamin Kaduk has entered the following ballot position for > draft-ietf-netmod-artwork-folding-09: Discuss >=20 > 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.) >=20 >=20 > Please refer to = https://www.ietf.org/iesg/statement/discuss-criteria.html > for more information about IESG DISCUSS and COMMENT positions. >=20 >=20 > The document, along with other ballot positions, can be found here: > https://datatracker.ietf.org/doc/draft-ietf-netmod-artwork-folding/ >=20 >=20 >=20 > ---------------------------------------------------------------------- > DISCUSS: > ---------------------------------------------------------------------- >=20 > I think the procedures described herein are incomplete without a = footer > to terminate the un-folding process. Otherwise, it seems that the > described algorithms would leave the two-line header for the second = and > subsequent instances of folded text in a single document. (If we = tried > to just blindly remove all instances of the header without seeking > boundaries, then we would misreconstruct content when different = folding > algorithms are used in the same document with the single-backslash > algorithm occurring first.) Are you referring to when an RFC contains multiple inclusions and one is = trying to unfold them all at once? That's not the intention here, as = noted in paragraph 3 in both sections 7.2 and 8.2. FWIW, this sounds = like the framing problem that the WG discussed with the conclusion that = extracting from plain-text is dead, now that XML is the required = submission format, and XML provides a superior framing mechanism than = any footer we could add. BTW, yes, each text inclusion in a single RFC may independently be = folded using either the '\' or '\\' strategy, with the recommendation = that '\' always be tried first and '\\' only used when '\' fails. If referring to a single text content instance, could you provide an = example illustrating the concern? > I don't think it's proper to refer to a script that requires bash > specifically as a "POSIX shell script". I did not attmept to check > whether any bash-specific features are used or this requirements stems > solely from the shebang line, though. I just changed "POSIX" to "Bash" in the title for Appendix A. Not that it matters, but "--posix" is passed into `bash` on the first = line of the script ;) > I think the shell script does need to use double-quotes around some > variable expansions, especially "$infile" and "$outfile", to work > properly for filenames containing spaces. We do quote "$infile" when > we're checking that it exists, just not (most of the time) when we > actually use it! Updated. > In addition to the above, I also share Alissa's (and Mirja's) = concerns, > but feel that Discuss is more appropriate than Abstain, so we can = discuss > what the best way to get this content published is. For it's fine > content, and we should see it published; it's just not immediately = clear > to me what the right way to do so is. Agreed. For now, I've changed it to Informational, but I think there = remains a discussion around if the draft should be re-rerun through the = IAB stream. My responses today to Alissa's Abstain and Suresh Discuss = dig into this. Is it okay to use those threads for this item? > ---------------------------------------------------------------------- > COMMENT: > ---------------------------------------------------------------------- >=20 > Section 4.1 >=20 > Automated folding of long lines is needed in order to support draft > compilations that entail a) validation of source input files (e.g., > XML, JSON, ABNF, ASN.1) and/or b) dynamic generation of output, = using > a tool that doesn't observe line lengths, that is stitched into the > final document to be submitted. >=20 > I don't think the intended meaning of "source input files" will be = clear > to all readers just from this text. Some discussion of how RFCs can > consider source code, data structures, generated output, etc., that = have > standalone representations and natural formats, and the need to = display > their contents in the RFC format that has different requirements might > be helpful context for this paragraph and the next. Is the updated text more understandable? > Section 7.1.2 >=20 > For some reason my mental model of "RFC style" does not use the word > "really" in this way, and prefers alternatives like "very" or > "exceptionally". (Also in Section 8.1.2.) s/Really/Exceptionally/ in both cases. > Section 7.2.1 >=20 > 1. Determine where the fold will occur. This location MUST be > before or at the desired maximum column, and MUST NOT be chosen > such that the character immediately after the fold is a space (' > ') character. For forced foldings, the location is between the >=20 > This is a rather awkward natural line break. I suggest an RFC Editor > note to make sure that the punctuation around the space character all > appears on the same line. RFC Editor note added, near the top of the draft. > 3. On the following line, insert any number of space (' ') > characters. >=20 > I'm not sure I'd characterize the procedure as "complete" when it = leaves > the value of the output subject to implementation choice such as this. > (Note that the next paragraph talks about the resulting "arbitrary > number of space" characters, and would presumably also need to be > adjusted if this text was adjusted.) > We also don't seem to bound this number of spaces to be fewer than the > target line length, which only matters in some weirdly pedantic sense. Added "subject to the resulting line not exceeding the desired maximum" = to both locations in the draft. > Section 7.2.2 >=20 > Scan the beginning of the text content for the header described in > Section 7.1.1. If the header is not present, starting on the first > line of the text content, exit (this text contents does not need to > be unfolded). >=20 > I'm not sure I understand what "starting on the first line of the text > content" is intended to mean. (Also in 8.2.2.) I think you are saying that it seems overly prescriptive, given that the = previous sentence says "beginning" and "header", it defies logic that = the header might not start on the first line and, by this text calling = it out, it suggests something special is going on. Is this what you = mean? To be clear, the only intention here is to catch the case = whereby there might be, e.g., some blank lines preceding the header. = Do you think the "starting on the first line of the text content" = fragment should be removed? > Section 8.2.1 >=20 > If this text content needs to and can be folded, insert the header > described in Section 8.1.1, ensuring that any additional printable > characters surrounding the header do not result in a line exceeding > the desired maximum. >=20 > We discussed above some cases when text could not be folded using the > algorithm from Section 7.2.1; in what case could text not be folded = with > this algorithm? Just the case when the implementation doesn't support > forced folding? Yes, that's the only case known. But what does this have to do with = Section 8.2.1? Are you keying off of the "needs to" part? Is it okay? > Section 10 >=20 > We should warn against implementations scanning past the end of a = buffer > (containing the entire contents of a file) when checking what's in the > beginning of the next line -- if a file ends with a backslash and "end > of line" but no further content, we could perform an out of bounds > access if the code assumes it is safe to check for the next line's > initial content. Both Sections 7.2.2 and 8.2.2 describe conditions to determine when = unfolding occurs. AFIACT, in both cases, the unfolding algorithm stays = within the bounds of those conditions. =20 For instance, given the input sequence [ '\' '\n' EOF] , the 7.2.2 = algorithm would replace it with [ EOF ] and the 8.2.2 algorithm wouldn't = even attempt to unfold it since the condition of the next line = containing a second '\' character isn't met. Is this Security Consideration needed? > Section 12.2 >=20 > I think that RFC 7991 could be normative, since we say "per RFC 7991" = to > describe some requirements on behavior. Likewise for RFC 7994, whose > character encoding requirements we incorporate by reference. Given that this format may be used in contexts outside the IETF, it = seems that understanding RFC 7991 is optional. Agreed? > Appendix A >=20 > I could perhaps argue that we should include a reference to POSIX for > "POSIX shell script" but find it somewhat hard to believe that this > would be a problem in practice. It's also moot since we require bash > specifically, so we'd need to reference bash instead of POSIX. Per above, "POSIX" is now "Bash" in the title. I added an Informative = reference for Bash. > copy/paste the script for local use. As should be evident by the > lack of the mandatory header described in Section 7.1.1, these > backslashes do not designate a folded line, such as described in > Section 7. >=20 > It perhaps should be, but I think currently is not -- we only talk = about > using the two-line header to detect instances of folding, without > mention of a requirement to be contained within / ENDS> or similar. Correct. The 2-line header is missing. That / = appears is secondary. Is there anything to be done here? > It seems that my perception of "common shell style" diverges from that > presented in this document, which is not necessarily problematic. > (Things like what diagnostics go to stdout vs. stderr, use or "> > /dev/null" vs ">> /dev/null", etc.) I fixed one "> /dev/null" case. As for style, we could review line by line but, for the cases where = output is directed to /dev/null/, it's unclear where the output is = needed, only the exit code status ever seems to matter. =20 > printf "Usage: rfcfold [-s ] [-c ] [-r] -i = " > printf " -o \n" >=20 > This summary usage line doesn't mention -d, -q, or -h. (Maybe it > doesn't have to, of course.) Added. > # ensure input file doesn't contain a TAB > grep $'\t' $infile >> /dev/null 2>&1 >=20 > (`grep -q` is a thing, here and elsewhere.) Added. > # unfold wip file > "$SED" '{H;$!d};x;s/^\n//;s/\\\n *//g' $temp_dir/wip > $outfile >=20 > [I don't remember why the s/^\n// is needed; similarly for the > unfold_it_2() case.] Erik responded to this point already. > if [[ $strategy -eq 2 ]]; then > min_supported=3D`expr ${#hdr_txt_2} + 8` > else > min_supported=3D`expr ${#hdr_txt_1} + 8` > fi >=20 > On the face of it this seems like it will produce "folded" output that > exceeds the line length, when we give min_supported of 54, use > autodetection of strategy, and have input that is incompatible with > fold_it_1(). Fixed off-by-one error. > process_input $@ >=20 > Need double-quotes around "$@" to properly handle arguments with > embedded spaces. Added. Kent // as co-author --Apple-Mail=_1EF271D6-7CC1-4FEE-A73D-3C3755F9C368 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=us-ascii Hi = Ben,

Thank you for your review. =  Comments below.

Update @ https://tools.ietf.org/html/draft-ietf-netmod-artwork-folding-1= 0

Kent // as = co-author


On Sep 5, 2019, at 2:07 AM, = Benjamin Kaduk via Datatracker <noreply@ietf.org> wrote:

Benjamin Kaduk has entered the following ballot position = for
draft-ietf-netmod-artwork-folding-09: 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/iesg/statement/discuss-criteria.htmlfor more information about IESG DISCUSS and COMMENT = positions.


The document, = along with other ballot positions, can be found here:
https://datatracker.ietf.org/doc/draft-ietf-netmod-artwork-fold= ing/



---------------------------------------------------------------= -------
DISCUSS:
---------------------------------------------------------------= -------

I think the procedures described = herein are incomplete without a footer
to terminate the = un-folding process.  Otherwise, it seems that the
described algorithms would leave the two-line header for the = second and
subsequent instances of folded text in a single = document.  (If we tried
to just blindly remove all = instances of the header without seeking
boundaries, then = we would misreconstruct content when different folding
algorithms are used in the same document with the = single-backslash
algorithm occurring first.)

Are = you referring to when an RFC contains multiple inclusions and one is = trying to unfold them all at once?   That's not the intention here, = as noted in paragraph 3 in both sections 7.2 and 8.2.  FWIW, this = sounds like the framing problem that the WG discussed with the = conclusion that extracting from plain-text is dead, now that XML is the = required submission format, and XML provides a superior framing = mechanism than any footer we could add.

BTW, yes, each text inclusion in a single RFC may = independently be folded using either the '\' or '\\' strategy, with the = recommendation that '\' always be tried first and '\\' only used when = '\' fails.

If referring to a single = text content instance, could you provide an example illustrating the = concern?



I don't think it's proper to refer to a = script that requires bash
specifically as a "POSIX shell = script".  I did not attmept to check
whether any = bash-specific features are used or this requirements stems
solely from the shebang line, though.

I = just changed "POSIX" to "Bash" in the title for Appendix = A.

Not that it matters, but = "--posix" is passed into `bash` on the first line of the script =  ;)



I think the shell script does need to use double-quotes = around some
variable expansions, especially "$infile" and = "$outfile", to work
properly for filenames containing = spaces.  We do quote "$infile" when
we're checking = that it exists, just not (most of the time) when we
actually= use it!

Updated.



In addition to the above, I = also share Alissa's (and Mirja's) concerns,
but feel that = Discuss is more appropriate than Abstain, so we can discuss
what the best way to get this content published is.  For = it's fine
content, and we should see it published; it's = just not immediately clear
to me what the right way to do = so is.

Agreed.   For now, I've changed it to = Informational, but I think there remains a discussion around if the = draft should be re-rerun through the IAB stream.   My responses = today to Alissa's Abstain and Suresh Discuss dig into this.  Is it = okay to use those threads for this item?


---------------------------------------------------------------= -------
COMMENT:
---------------------------------------------------------------= -------

Section 4.1

  Automated folding of long lines is needed in = order to support draft
  compilations that = entail a) validation of source input files (e.g.,
=   XML, JSON, ABNF, ASN.1) and/or b) dynamic generation of = output, using
  a tool that doesn't observe = line lengths, that is stitched into the
  final = document to be submitted.

I don't think the = intended meaning of "source input files" will be clear
to = all readers just from this text.  Some discussion of how RFCs = can
consider source code, data structures, generated = output, etc., that have
standalone representations and = natural formats, and the need to display
their contents in = the RFC format that has different requirements might
be = helpful context for this paragraph and the next.

Is = the updated text more understandable?



Section = 7.1.2

For some reason my mental model of = "RFC style" does not use the word
"really" in this way, = and prefers alternatives like "very" or
"exceptionally". =  (Also in Section 8.1.2.)

s/Really/Exceptionally/ in both = cases.


Section = 7.2.1

  1.  Determine where = the fold will occur.  This location MUST be
=       before or at the desired maximum = column, and MUST NOT be chosen
=       such that the character immediately = after the fold is a space ('
=       ') character.  For forced = foldings, the location is between the

This = is a rather awkward natural line break.  I suggest an RFC Editor
note to make sure that the punctuation around the space = character all
appears on the same line.

RFC = Editor note added, near the top of the draft.



  3. =  On the following line, insert any number of space (' ')
      characters.

I'm not sure I'd characterize the procedure as = "complete" when it leaves
the value of the output subject = to implementation choice such as this.
(Note that the next = paragraph talks about the resulting "arbitrary
number of = space" characters, and would presumably also need to be
adjusted if this text was adjusted.)
We also = don't seem to bound this number of spaces to be fewer than the
target line length, which only matters in some weirdly = pedantic sense.

Added "subject to the resulting line not exceeding = the desired maximum" to both locations in the draft.



Section = 7.2.2

  Scan the beginning of = the text content for the header described in
=   Section 7.1.1.  If the header is not present, starting = on the first
  line of the text content, exit = (this text contents does not need to
  be = unfolded).

I'm not sure I understand what = "starting on the first line of the text
content" is = intended to mean.  (Also in 8.2.2.)

I = think you are saying that it seems overly prescriptive, given that the = previous sentence says "beginning" and "header", it defies logic that = the header might not start on the first line and, by this text calling = it out, it suggests something special is going on.   Is this what = you mean?   To be clear, the only intention here is to catch the = case whereby there might be, e.g., some blank lines preceding the = header.   Do you think the "starting on the first line of the text = content" fragment should be removed?



Section = 8.2.1

  If this text content = needs to and can be folded, insert the header
=   described in Section 8.1.1, ensuring that any additional = printable
  characters surrounding the header = do not result in a line exceeding
  the desired = maximum.

We discussed above some cases when = text could not be folded using the
algorithm from Section = 7.2.1; in what case could text not be folded with
this = algorithm?  Just the case when the implementation doesn't = support
forced folding?

Yes, = that's the only case known.   But what does this have to do with = Section 8.2.1?  Are you keying off of the "needs to" part?   = Is it okay?



Section 10

We should warn = against implementations scanning past the end of a buffer
(containing the entire contents of a file) when checking = what's in the
beginning of the next line -- if a file ends = with a backslash and "end
of line" but no further content, = we could perform an out of bounds
access if the code = assumes it is safe to check for the next line's
initial = content.

Both Sections 7.2.2 and 8.2.2 describe conditions to = determine when unfolding occurs. AFIACT, in both cases, the unfolding = algorithm stays within the bounds of those conditions. =  

For instance, given the input = sequence [ '\' '\n' EOF] , the 7.2.2 algorithm would replace it with [ = EOF ] and the 8.2.2 algorithm wouldn't even attempt to unfold it since = the condition of the next line containing a second '\' character isn't = met.

Is this Security Consideration = needed?



Section 12.2

I think that RFC = 7991 could be normative, since we say "per RFC 7991" to
describe some requirements on behavior.  Likewise for = RFC 7994, whose
character encoding requirements we = incorporate by reference.

Given that this format may be used in contexts = outside the IETF, it seems that understanding RFC 7991 is optional. =  Agreed?


Appendix A

I could perhaps argue = that we should include a reference to POSIX for
"POSIX = shell script" but find it somewhat hard to believe that this
would be a problem in practice.  It's also moot since we = require bash
specifically, so we'd need to reference bash = instead of POSIX.

Per above, "POSIX" is now "Bash" in the title. =   I added an Informative reference for Bash.


  copy/paste the script for local use. =  As should be evident by the
  lack of the = mandatory header described in Section 7.1.1, these
=   backslashes do not designate a folded line, such as = described in
  Section 7.

It perhaps should be, but I think currently is not -- we only = talk about
using the two-line header to detect instances = of folding, without
mention of a requirement to be = contained within <CODE BEGINS>/<CODE
ENDS> or = similar.

Correct. =  The 2-line header is missing.  That <CODE = BEGINS>/<CODE ENDS> appears is secondary.  Is there = anything to be done here?



It seems that my perception of "common shell = style" diverges from that
presented in this document, = which is not necessarily problematic.
(Things like what = diagnostics go to stdout vs. stderr, use or ">
/dev/null"= vs ">> /dev/null", etc.)

I = fixed one "> /dev/null" case.

As = for style, we could review line by line but, for the cases where output = is directed to /dev/null/, it's unclear where the output is needed, only = the exit code status ever seems to matter.  


    printf "Usage: rfcfold [-s = <strategy>] [-c <col>] [-r] -i <infile>"
=     printf " -o <outfile>\n"

This summary usage line doesn't mention -d, -q, or -h. =  (Maybe it
doesn't have to, of course.)

Added.


    # ensure input file doesn't contain a TAB
    grep $'\t' $infile >> = /dev/null 2>&1

(`grep -q` is a = thing, here and elsewhere.)

Added.


    # unfold wip file
=     "$SED" '{H;$!d};x;s/^\n//;s/\\\n *//g' = $temp_dir/wip > $outfile

[I don't = remember why the s/^\n// is needed; similarly for the
unfold_it_2() case.]

Erik = responded to this point already.


    if [[ $strategy -eq 2 ]]; then
=       min_supported=3D`expr ${#hdr_txt_2} = + 8`
    else
=       min_supported=3D`expr ${#hdr_txt_1} = + 8`
    fi

On the face of it this seems like it will produce "folded" = output that
exceeds the line length, when we give = min_supported of 54, use
autodetection of strategy, and = have input that is incompatible with
fold_it_1().

Fixed = off-by-one error.



    process_input $@

Need double-quotes around "$@" to properly = handle arguments with
embedded spaces.

Added.


Kent // as co-author


= --Apple-Mail=_1EF271D6-7CC1-4FEE-A73D-3C3755F9C368-- From nobody Thu Sep 5 15:04:13 2019 Return-Path: <0100016d03744774-f6d771b0-9c05-42e5-9e1a-58c018fb0325-000000@amazonses.watsen.net> X-Original-To: netmod@ietfa.amsl.com Delivered-To: netmod@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id E3E1D120B4E; Thu, 5 Sep 2019 15:03:40 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.897 X-Spam-Level: X-Spam-Status: No, score=-1.897 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_NONE=0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1024-bit key) header.d=amazonses.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id Rqw9QKExMBIG; Thu, 5 Sep 2019 15:03:37 -0700 (PDT) Received: from a8-31.smtp-out.amazonses.com (a8-31.smtp-out.amazonses.com [54.240.8.31]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id A57EC120B20; Thu, 5 Sep 2019 15:03:36 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/simple; s=6gbrjpgwjskckoa6a5zn6fwqkn67xbtw; d=amazonses.com; t=1567721015; h=From:Message-Id:Content-Type:Mime-Version:Subject:Date:In-Reply-To:Cc:To:References:Feedback-ID; bh=NF5CG2PyKqF3wVYK2+bK5tOjmp2NiIpN7Cn5aTPrM7o=; b=MzWoID2RyaSRF1juTtfomE/NyKkyzkgjjZqabUqaHA9Zn58z/yFsb1i6Dv8TtU6N k6Y5SKUfYkxAyUzf4GcC0/WfiNrCQ6pcJSMHCWOBJm1Ia2t8VH4gszdlf0hE3tiY5HD cJtxrqwMN7Iml1pS6yjMlafgXZ8SG7O1j2tiKWjI= From: Kent Watsen Message-ID: <0100016d03744774-f6d771b0-9c05-42e5-9e1a-58c018fb0325-000000@email.amazonses.com> Content-Type: multipart/alternative; boundary="Apple-Mail=_E4E36897-A45C-4C2B-980B-B555B13DA821" Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.11\)) Date: Thu, 5 Sep 2019 22:03:35 +0000 In-Reply-To: <156755725979.20611.1246275298689979326.idtracker@ietfa.amsl.com> Cc: The IESG , draft-ietf-netmod-artwork-folding@ietf.org, Lou Berger , "netmod-chairs@ietf.org" , "netmod@ietf.org" To: Adam Roach References: <156755725979.20611.1246275298689979326.idtracker@ietfa.amsl.com> X-Mailer: Apple Mail (2.3445.104.11) X-SES-Outgoing: 2019.09.05-54.240.8.31 Feedback-ID: 1.us-east-1.DKmIRZFhhsBhtmFMNikgwZUWVrODEw9qVcPhqJEI2DA=:AmazonSES Archived-At: Subject: Re: [netmod] Adam Roach's No Objection on draft-ietf-netmod-artwork-folding-09: (with COMMENT) X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 05 Sep 2019 22:03:48 -0000 --Apple-Mail=_E4E36897-A45C-4C2B-980B-B555B13DA821 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=utf-8 Hi Adam, Thank you for your review. Comments below. Update @ = https://tools.ietf.org/html/draft-ietf-netmod-artwork-folding-10 = Kent // as co-author > On Sep 3, 2019, at 8:34 PM, Adam Roach via Datatracker = wrote: >=20 > Adam Roach has entered the following ballot position for > draft-ietf-netmod-artwork-folding-09: No Objection >=20 > 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.) >=20 >=20 > Please refer to = https://www.ietf.org/iesg/statement/discuss-criteria.html > for more information about IESG DISCUSS and COMMENT positions. >=20 >=20 > The document, along with other ballot positions, can be found here: > https://datatracker.ietf.org/doc/draft-ietf-netmod-artwork-folding/ >=20 >=20 >=20 > ---------------------------------------------------------------------- > COMMENT: > ---------------------------------------------------------------------- >=20 > Thanks for taking on this work to fill a hole in the tools that > we have for production of RFCs. I have one fairly major comment > and several editorial suggestions. >=20 > = --------------------------------------------------------------------------= - >=20 > Abstract: >=20 >> This document defines two strategies for handling long lines in >> width-bounded text content. One strategy is based on the historic >> use of a single backslash ('\') character to indicate where line- >=20 > Nit: "historical" Fixed. > = --------------------------------------------------------------------------= - >=20 > =C2=A71: >=20 >> According to the RFC Editor, >> there is currently no convention in place for how to handle long >> lines in such inclusions, other than advising authors to clearly >> indicate what manipulation has occurred. >=20 > This won't age well. Perhaps "Historically, there has been no > RFC-Editor-recommended convention in place for how to handle..." Suggested text incorporated. > = --------------------------------------------------------------------------= - >> This document defines two strategies for handling long lines in >> width-bounded text content. One strategy is based on the historic >> use of a single backslash ('\') character to indicate where line- >=20 > Nit: "historical" Fixed. > = --------------------------------------------------------------------------= - >=20 > =C2=A77.1.1: >=20 >> NOTE: '\' line wrapping per BCP XXX (RFC XXXX) >=20 > Using this string as the start of the specially-wrapped section > seems somewhat problematic, as it forecloses on the possibility > of also *citing* this BCP at that point in the document. For example, > if I were to use this format, I would definitely want to use a string > more of the format: >=20 > NOTE: '\' line wrapping per BCP XXX ([RFC XXXX]) >=20 > (taking note of the added brackets). >=20 > If this has already been debated in the working group and the current = text > is the result of carefully considering this issue and deciding that = the > use of the specified string has benefits that outweigh the drawback of > not being able to cite the document per ordinary convention, then = don't afford > my suggestion any undue weight. I'm not trying to change a consensus = decision. >=20 > But if this is a simple oversight, I think it does need to be given > significant thought. For example, I personally am rather likely to = elect to do > things "the old way" in my own documents rather than using this format = because > of the awkwardness of properly citing a normative reference. >=20 > This same comment applies to =C2=A78.1.1, of course. Unsure. To provide context, YANG modules many times include references = to RFCs in artwork sections. I used to put these references inside = square brackets, but the RFC Editors would convert them to parentheses. = I have since moved to using parentheses, e.g., "(RFC XXXX)", in artwork = and haven't experienced any corrections since. Leaving as is for now. > = --------------------------------------------------------------------------= - >=20 >> Appendix A. POSIX Shell Script: rfcfold >=20 > Please add [POSIX.1-2017] as a reference. I've replaced "POSIX" with "Bash", and added a reference for Bash. Kent // as co-author --Apple-Mail=_E4E36897-A45C-4C2B-980B-B555B13DA821 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=utf-8 Hi = Adam,

Thank you for your review. =  Comments below.

Update @ https://tools.ietf.org/html/draft-ietf-netmod-artwork-folding-1= 0

Kent // as co-author


On Sep 3, 2019, at 8:34 PM, Adam Roach via = Datatracker <noreply@ietf.org> wrote:

Adam = Roach has entered the following ballot position for
draft-ietf-netmod-artwork-folding-09: No Objection

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/iesg/statement/discuss-criteria.htmlfor more information about IESG DISCUSS and COMMENT = positions.


The document, = along with other ballot positions, can be found here:
https://datatracker.ietf.org/doc/draft-ietf-netmod-artwork-fold= ing/



---------------------------------------------------------------= -------
COMMENT:
---------------------------------------------------------------= -------

Thanks for taking on this work to = fill a hole in the tools that
we have for production of = RFCs. I have one fairly major comment
and several = editorial suggestions.

---------------------------------------------------------------= ------------

Abstract:

This document defines = two strategies for handling long lines in
width-bounded = text content.  One strategy is based on the historic
= use of a single backslash ('\') character to indicate where line-

Nit: "historical"

Fixed.

---------------------------------------------------------------= ------------

=C2=A71:

According to the RFC = Editor,
there is currently no convention in place for how = to handle long
lines in such inclusions, other than = advising authors to clearly
indicate what manipulation = has occurred.

This won't age = well. Perhaps "Historically, there has been no
RFC-Editor-recommended convention in place for how to = handle..."

Suggested text incorporated.


---------------------------------------------------------------= ------------
This = document defines two strategies for handling long lines in
= width-bounded text content.  One strategy is based on the = historic
use of a single backslash ('\') character to = indicate where line-

Nit: = "historical"

Fixed.


---------------------------------------------------------------= ------------

=C2=A77.1.1:

 NOTE: '\' line = wrapping per BCP XXX (RFC XXXX)

Using this string as the start of the specially-wrapped = section
seems somewhat problematic, as it forecloses on = the possibility
of also *citing* this BCP at that point in = the document. For example,
if I were to use this format, I = would definitely want to use a string
more of the = format:

   NOTE: '\' line = wrapping per BCP XXX ([RFC XXXX])

(taking = note of the added brackets).

If this has = already been debated in the working group and the current text
is the result of carefully considering this issue and = deciding that the
use of the specified string has benefits = that outweigh the drawback of
not being able to cite the = document per ordinary convention, then don't afford
my = suggestion any undue weight. I'm not trying to change a consensus = decision.

But if this is a simple = oversight, I think it does need to be given
significant = thought. For example, I personally am rather likely to elect to do
things "the old way" in my own documents rather than using = this format because
of the awkwardness of properly citing = a normative reference.

This same comment = applies to =C2=A78.1.1, of course.

Unsure.=  To provide context, YANG modules many times include references to = RFCs in artwork sections.  I used to put these references inside = square brackets, but the RFC Editors would convert them to parentheses. =  I have since moved to using parentheses, e.g., "(RFC XXXX)", in = artwork and haven't experienced any corrections since.

Leaving as is for now.



---------------------------------------------------------------= ------------

Appendix A.  POSIX Shell Script: rfcfold

Please add [POSIX.1-2017] as a = reference.

I've replaced "POSIX" with "Bash", and added a = reference for Bash.


Kent // as co-author







= --Apple-Mail=_E4E36897-A45C-4C2B-980B-B555B13DA821-- From nobody Thu Sep 5 15:07:44 2019 Return-Path: <0100016d0377e0e9-e6681359-e9e8-40b3-91fb-82c8b13c4597-000000@amazonses.watsen.net> X-Original-To: netmod@ietfa.amsl.com Delivered-To: netmod@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id D0EF0120232; Thu, 5 Sep 2019 15:07:34 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.896 X-Spam-Level: X-Spam-Status: No, score=-1.896 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_NONE=0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1024-bit key) header.d=amazonses.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 2q4Fe5QzbmLn; Thu, 5 Sep 2019 15:07:33 -0700 (PDT) Received: from a8-33.smtp-out.amazonses.com (a8-33.smtp-out.amazonses.com [54.240.8.33]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 7B510120817; Thu, 5 Sep 2019 15:07:32 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/simple; s=6gbrjpgwjskckoa6a5zn6fwqkn67xbtw; d=amazonses.com; t=1567721251; h=From:Message-Id:Content-Type:Mime-Version:Subject:Date:In-Reply-To:Cc:To:References:Feedback-ID; bh=iA/bixqDhhfmEGFLGZUzBbk7n6l8oW9cEC72uLCeAWw=; b=VL52HGJ8a0nDsh7J6YdEhur0nSa2S5HomQxWL9KI7gzovvEh8x6XALMsZwnZSJHP yShq6klVyrlIV5hL37p6dgnVhGKCZSVAL0JvgfwjcDLKy0ib09LYVUdftPus+g92HYr YvP0Qy/s/rn4BvaELD5V9uDU4ZtgpvCfjtJM5yT4= From: Kent Watsen Message-ID: <0100016d0377e0e9-e6681359-e9e8-40b3-91fb-82c8b13c4597-000000@email.amazonses.com> Content-Type: multipart/alternative; boundary="Apple-Mail=_980527BD-6CF3-4DEC-93C0-2D441A857530" Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.11\)) Date: Thu, 5 Sep 2019 22:07:31 +0000 In-Reply-To: <0100016d0265ae6e-cda03694-9b45-4d83-b1e6-461849aceb79-000000@email.amazonses.com> Cc: The IESG , draft-ietf-netmod-artwork-folding@ietf.org, Lou Berger , "netmod-chairs@ietf.org" , "netmod@ietf.org" To: Suresh Krishnan References: <156769446677.22608.7381486936621146842.idtracker@ietfa.amsl.com> <0100016d0265ae6e-cda03694-9b45-4d83-b1e6-461849aceb79-000000@email.amazonses.com> X-Mailer: Apple Mail (2.3445.104.11) X-SES-Outgoing: 2019.09.05-54.240.8.33 Feedback-ID: 1.us-east-1.DKmIRZFhhsBhtmFMNikgwZUWVrODEw9qVcPhqJEI2DA=:AmazonSES Archived-At: Subject: Re: [netmod] Suresh Krishnan's Discuss on draft-ietf-netmod-artwork-folding-09: (with DISCUSS and COMMENT) X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 05 Sep 2019 22:07:35 -0000 --Apple-Mail=_980527BD-6CF3-4DEC-93C0-2D441A857530 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii Hi Suresh,=20 Please see = https://tools.ietf.org/html/draft-ietf-netmod-artwork-folding-10 = for = updates. It's now Informational. Kent // as co-author > On Sep 5, 2019, at 1:08 PM, Kent Watsen wrote: >=20 > Hi Suresh, >=20 > Thank you for your review. Comments below. >=20 > Kent // as co-author >=20 >=20 >> On Sep 5, 2019, at 10:41 AM, Suresh Krishnan via Datatracker = > wrote: >>=20 >> Suresh Krishnan has entered the following ballot position for >> draft-ietf-netmod-artwork-folding-09: Discuss >>=20 >> 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.) >>=20 >>=20 >> Please refer to = https://www.ietf.org/iesg/statement/discuss-criteria.html = >> for more information about IESG DISCUSS and COMMENT positions. >>=20 >>=20 >> The document, along with other ballot positions, can be found here: >> https://datatracker.ietf.org/doc/draft-ietf-netmod-artwork-folding/ = >>=20 >>=20 >>=20 >> = ---------------------------------------------------------------------- >> DISCUSS: >> = ---------------------------------------------------------------------- >>=20 >> After some thought I think there are two things about this document = that make >> me uncomfortable enough to ballot Discuss. >>=20 >> a) Due to its home in the netmod WG it is highly likely that people = outside the >> yang community have not paid enough attention to this work. Since = this is >> applicable to code fragments of all kinds, I think the home chosen = for this RFC >> might have inadvertently limited input from the broader community. >=20 > Agreed. The original I-D was targeted for IAB stream. It wasn't = going to be presented in NETMOD, but did (by coercion). During the = presentation I mentioned that its applicability was more than NETMOD and = that it should go thru IAB, just like the "xml2rfc" RFCs (7749 and = 7991). The working group felt that it should stay in the WG and hence = here we are. :sigh: >=20 >=20 >> b) Given a) I think it is better that this document go forward as an >> Informational document rather than a BCP so that use of this = technique becomes >> optional, without the force of a BCP behind it. >=20 > I'm okay with this, modulo my comment to Alissa. Actually, if we = only view the RFC as specifying a format then, in my mind, it doesn't = actually contain the "best practice". FWIW, SHOULD appears only once, = in a sentence stating that folding SHOULD be automated, in a section = titled "Goals". That said, if not a BCP, then how to encourage people = to use it, so that automation works? For this reason alone, it seems = that either the draft should be a BCP or Datatracker is updated to = auto-fold as needed. Perhaps the right answer is to do Informational = now and hope that Datatracker is updated in time? >=20 >=20 >=20 >> = ---------------------------------------------------------------------- >> COMMENT: >> = ---------------------------------------------------------------------- >>=20 >> I do agree with my Abstaining colleagues that this should probably = not be on >> the IETF stream but I think the work is useful enough to go forward. >=20 > It should've been on the IAB stream. Whether it should go forward, = after having the BCP attribute removed, or re-run via the IAB stream is = up to the IESG. >=20 >=20 > Kent // as co-author >=20 >=20 --Apple-Mail=_980527BD-6CF3-4DEC-93C0-2D441A857530 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=us-ascii Hi = Suresh, 

Please = see https://tools.ietf.org/html/draft-ietf-netmod-artwork-folding-1= 0 for updates.  It's now Informational.

Kent // as = co-author




On Sep = 5, 2019, at 1:08 PM, Kent Watsen <kent+ietf@watsen.net> wrote:

Hi Suresh,

Thank you for your = review.  Comments below.

Kent // as co-author


On Sep 5, 2019, at 10:41 AM, = Suresh Krishnan via Datatracker <noreply@ietf.org> wrote:

Suresh= Krishnan has entered the following ballot position for
draft-ietf-netmod-artwork-folding-09: 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/iesg/statement/discuss-criteria.htmlfor more information about IESG DISCUSS and COMMENT = positions.


The document, = along with other ballot positions, can be found here:
https://datatracker.ietf.org/doc/draft-ietf-netmod-artwork-fold= ing/



---------------------------------------------------------------= -------
DISCUSS:
---------------------------------------------------------------= -------

After some thought I think there = are two things about this document that make
me = uncomfortable enough to ballot Discuss.

a) = Due to its home in the netmod WG it is highly likely that people outside = the
yang community have not paid enough attention to this = work. Since this is
applicable to code fragments of all = kinds, I think the home chosen for this RFC
might have = inadvertently limited input from the broader community.

Agreed.  The original I-D was = targeted for IAB stream.  It wasn't going to be presented in = NETMOD, but did (by coercion).  During the presentation I mentioned = that its applicability was more than NETMOD and that it should go thru = IAB, just like the "xml2rfc" RFCs (7749 and 7991).  The working = group felt that it should stay in the WG and hence here we are. =  :sigh:

b) Given a) I think it is better that this = document go forward as an
Informational document rather = than a BCP so that use of this technique becomes
optional, = without the force of a BCP behind it.

I'm okay with this, modulo my comment = to Alissa.   Actually, if we only view the RFC as specifying a = format then, in my mind, it doesn't actually contain the "best = practice".  FWIW, SHOULD appears only once, in a sentence stating = that folding SHOULD be automated, in a section titled "Goals". =  That said, if not a BCP, then how to encourage people to use it, = so that automation works?  For this reason alone, it seems that = either the draft should be a BCP or Datatracker is updated to auto-fold = as needed.  Perhaps  the right answer is to do Informational = now and hope that Datatracker is updated in time?


---------------------------------------------------------------= -------
COMMENT:
---------------------------------------------------------------= -------

I do agree with my Abstaining = colleagues that this should probably not be on
the IETF = stream but I think the work is useful enough to go forward.

It should've been on the IAB stream.  Whether it should = go forward, after having the BCP attribute removed, or re-run via the = IAB stream is up to the IESG.


Kent // as co-author



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X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 06 Sep 2019 01:43:13 -0000 --Apple-Mail=_319879B5-F092-4973-994C-0057176FB446 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=utf-8 Hi Dmytro, First of all, I find the discussion within the netmod WG as just the = wrong place to have this discussion. You will be hard pressed to find = too many people who can give you critical feedback on the model in this = WG. See inline with [mj] > On Sep 5, 2019, at 2:03 PM, Dmytro Shytyi = wrote: >=20 > [Dmytro] > Hello Mahesh Jethanandani, > Thank you for your comment. > Please find answers inline. >=20 > >I find the representation of a service model in this draft for a uCPE = as too simple. In reality, on a uCPE, you could be running a Network = Service (NS), which is composed of multiple VNFs interconnected = together. This service model does not address such a configuration. > [Dmytro] > This service model presented in the draft supports N VMs in the NS and = addreses configuration with multiple VMs and switches with plenty of = links. It is well tested (with service chained VMs) on equipent from = different well known suppliers. The idea to have complex flexible = service in the network service orchestrator for uCPE. > in the yang model we have list (marked by pyang with "*") of VMs where = the key is name of the vm, thus you may define as much VM as you wish. [mj] You have introduced concept of interfaces, ports, and switches that = does not exist in the NFV world. VNFs have virtual links and connection = points. There is no (physical) port or interface that one connects to in = a VNF. It might exist on the server on which the VM runs but not in a = VNF or a virtualization instance. >=20 > Example of 2 VMs that are service chained = (swLAN-VM1-swService-VM2-swWAN) >=20 > +--rw vms* [vm] > +--rw vm string > +--rw ports* [port] > | +--rw port string > | +--rw name? string > | +--rw link? -> ../../../links/link > +--rw ram? string > +--rw cpu? string > +--rw storages* [id] > | +--rw id string > | +--rw location? string > +--rw day0-config > +--rw location? string > +--rw day0-var-path? string > +--rw variable* [name] > +--rw name string > +--rw value? string >=20 >=20 > So basically the list "+--rw wms* [vm]" can be represented/"expanded" = in this way where the names and number ov vms(N) is set by user: >=20 > >>>>> +--rw vm1 string > | +--rw ports* [port] > | | +--rw port string > | | +--rw name? string > | | +--rw link? -> ../../../links/link > | +--rw ram? string > | +--rw cpu? string > | +--rw storages* [id] > | | +--rw id string > | | +--rw location? string > | +--rw day0-config > | | +--rw location? string > | | +--rw day0-var-path? string > | | +--rw variable* [name] > | | +--rw name string > | | +--rw value? string > >>>>> +--rw vm2 string > | +--rw ports* [port] > | | +--rw port string > | | +--rw name? string > | | +--rw link? -> ../../../links/link > | +--rw ram? string > | +--rw cpu? string > | +--rw storages* [id] > | | +--rw id string > | | +--rw location? string > | +--rw day0-config > | | +--rw location? string > | | +--rw day0-var-path? string > | | +--rw variable* [name] > | | +--rw name string > | | +--rw value? string > .... > | =20 > >>>>> +--rw vmN string > +--rw ports* [port] > | +--rw port string > | +--rw name? string > | +--rw link? -> ../../../links/link > +--rw ram? string > +--rw cpu? string > +--rw storages* [id] > | +--rw id string > | +--rw location? string > +--rw day0-config > +--rw location? string > +--rw day0-var-path? string > +--rw variable* [name] > +--rw name string > +--rw value? string [mj] I understand how you instantiate multiple VMs. What I do not = understand is for example, your representation of a link. Currently, it = points to a link definition within the same Virtualization instance. How = does that tell me what is it connected to? Why is CPU defined as a string? And what does =E2=80=9CAmount of cpus=E2=80= =9D mean? Number of CPUs? Same for RAM. Also VMs have images and storage. If your storage is an image, where is = the storage (disk) definition?=20 Again, definition of CPUs, RAM, storage belong in a VNF Descriptor = (VNFD), not in a service model. One needs that information at the time = of instantiation of a VNF, not at the time of turning up a service. >=20 > >Besides, how is the configuration of a uCPE device for a VNF = different from configuration of a VNF in a provider Network Function = Virtualization Infrastructure (NFVI) like OpenStack or VMware VIO? > [Dmytro] > Modern uCPE support netconf. And if you go to the YANG RFC6020 you = will find the next statement: > "YANG is a data modeling language used to model configuration and > state data manipulated by the Network Configuration Protocol > (NETCONF), NETCONF remote procedure calls, and NETCONF = notifications." > When we talk about Openstack it is YAML, not YANG.=20 [mj] If I give you a YANG model to configure OpenStack, tell me how = would that be different from configuring a uCPE? >=20 > >And would you not need to enable the service on the provider side to = make the services running on the uCPE functional? > [Dmytro] > Indeed, to manage the uCPE located on the client side we need to = enable the provider side. The presented model is this actually "sits" in = orchestaror that is located on the provider side. In the draft it is = mentioned that it is "network service yang model- NSYM" that is in the = orchestrator (according to the rfc8199). [mj] By sitting in the orchestrator, you have not defined how the = service on the provider side is enabled. >=20 > >There is significant amount of work that has been done in ETSI on the = configuration and management of VNF and NS. Authors should spend some = time going through the specifications specified by ETSI to make sure = they are not re-specifying work that has been done there, and instead = see how they could augment the work that has already been defined. > [Dmytro] > The uCPE management mechanism(in the service provider network service = orchestrator) may involve not only YANG modules but also the speficic = logic written in programming languages. The proposed organisation of = yang model is a solution that provides the best fit for combination = (YANG modules + specific logic written in python for example ) to = manage different existing NFVIs in the uCPE (by the orchestrator). [mj] IETF does not specify implementation or logic written in a = programming language. >=20 > In the case of uCPE, the mapping (w/wo additinal logic) of "variables = " between service yang modules (in the orchestrator) and NETCONF = payload(that is sent to the uCPE) will be more complex (requires = additional transformations in the logic) with generic approach, then the = solution presented in the ID, that is tailored to the uCPE.Therefore I = find the proposed solution as a stadalone generic approach to manage = multiple vendor uCPE that appears to be a particular case tailored for = uCPE NFVIs that may be not nesseraly follows RFC8345. I would be pleased = if you could comment this. [mj] To me this sounds like an implementation level detail for a uCPE. = Again, not something that IETF standardizes.=20 >=20 >=20 > >Authors can start by going through IFA010, IFA011, IFA014, and its = YANG specification in SOL006. > [Dmytro] > I would like to draw your attention that these documents seems to be = directed to the generic solution including also cloud environment, that = brings a lot of complexity. There is some difference between cloud and = client site. > For example, case for VNFD, in the cloud we need to have flavours, = different VDUs For VNFD, to change the VM capacities according to the = load as we have the extendible infrastructure. > The ucpe has limited resources, not as a cloud infrastructure in the = data center. [mj] Define a single flavor in case of uCPE and keep it simple. > For example, in the case of NSD: NSD includes the VLD that defines = Virtual Links. But in the uCPE case you may have virtual links + virtual = switches that are not part of the NSD defined in the ETSI. [mj] But you are allowed to define more than 2 links. Why do you need to = define a switch? > For example, i'm not avare of VNFD that brings option of (0day = configuration)/bootstrap for VNF. Moreover in the proposed model there = is a possibility to set variables that will be substituted in the ".iso" = bootstrap image (ex.cloudinit) that is assigned to the VM in the uCPE. [mj] That is considered part of the workflow. Your workflow engine will = allow you to set variables that are substituted in the ISO image or when = the image boots up. > Thus the generic solution of ETSI leads to more complex = implementations of the code that is responsible for mapping between = YANG/XML when the solution proposed in the Inernet Draft is tailored to = the uCPE use-case and should bring the simplisity when developping the = mapping logic and inroduce features that are not presented by ETSI. > The Internet Draft also defines the term uCPE that is not defined at = IETF yet. [mj] I do not think this is the right WG or even the right body to = standardize this model. Mahesh Jethanandani mjethanandani@gmail.com >=20 > >>On Sep 5, 2019, at 9:02 AM, Dmytro Shytyi > wrote: > >>Dear All, > >>Please find the updated version of the VYSM Internet Draft(v0.2). > >>The new version of draft introduces an extension of the yang model = defined in previous version. =46rom now the VYSM supports (0day = configuration)/(bootstrap) of the VNFs hosted in the uCPE. > >>With 0day configuration in the uCPE we can setup minimal required = configuration of vRouter (such as ip address, hostname,etc..), SD-WAN = (address of the SD-WAN manager, dhcp activation, etc..), etc.. > >>Details: > >>A new version of I-D, draft-shytyi-netmod-vysm-02.txt\A0 > >>has been successfully submitted by Dmytro Shytyi and posted to = the\A0 > >>IETF repository.\A0 > >>Name:\A0\A0\A0\A0\A0\A0\A0\A0draft-shytyi-netmod-vysm\A0 > >>Revision:\A0\A0\A0\A002\A0 > >>Title:\A0\A0\A0\A0\A0\A0\A0\A0Virtualization YANG Servise Model = (VYSM)\A0 > >>Document date:\A0\A0\A0\A02019-09-04\A0 > >>Group:\A0\A0\A0\A0\A0\A0\A0\A0Individual Submission\A0 > >>Pages:\A0\A0\A0\A0\A0\A0\A0\A010\A0 > >>URL: = https://www.ietf.org/internet-drafts/draft-shytyi-netmod-vysm-02.txt\A0 = > >>Status: = https://datatracker.ietf.org/doc/draft-shytyi-netmod-vysm/\A0 = > >>Htmlized: https://tools.ietf.org/html/draft-shytyi-netmod-vysm-02\A0 = > >>Htmlized: = https://datatracker.ietf.org/doc/html/draft-shytyi-netmod-vysm\A0 = > >>Diff: = https://www.ietf.org/rfcdiff?url2=3Ddraft-shytyi-netmod-vysm-02\A0 = > >>Abstract:\A0 > >> > >>This document provides a specification of the Virtual Network\A0 > >> > >>Functions YANG Service Model (VYSM). The VNF YANG Service Model\A0 > >> > >>serves as a base framework for managing an universal Customer-\A0 > >> > >>Premises Equipment (uCPE) NFV subsystem from the Orchestrator.\A0 > >>>> > >>>># # # : Dmytro Shytyi [mailto:ietf.dmytro@shytyi.net = ] > >>>># # # # : 2019# 8# 28#\A0 21:46 > >>>># # # : Robert Varga >; Qin Wu = > > >>>># # : netmod > > >>>># # : Re: [netmod] New Version draft-shytyi-netmod-vysm-02.txt as = Working Group document. > >>>> > >>>>Hello, > >>>> > >>>>Please find comments inline. > >>>>>On 27/08/2019 18:03, Dmytro Shytyi wrote: > >>>>>> Dear All, > >>>>>>\A0 > >>>>>> I am one of the authors of ID VYSM and I would like to draw = your > >>>>>> attention to the evolution of the > >>>>>> = draft\A0https://www.ietf.org/internet-drafts/draft-shytyi-netmod-vysm-01.t= xt = . > >>>>>> Recently we produced (but did not submitted yet) a new version = of ID > >>>>>> (02) and I beleive it fits the netmod working group. > >>>>>>\A0 > >>>>>> We would be gratefull if you could suggest if the new = version(02) of the > >>>>>> document\A0 could become an official work item of the WG? > >>>>>> \A0 \A0 \A0 If yes, could you please indicate which = modifications must be done > >>>>>> in the document before submition. > >>>>>\A0 > >>>>>Hmm, looking over the model, it would seem there is quite a bit = of > >>>>>overlap with RFC8345 -- to the point I believe the model could be > >>>>>formulated in terms of RFC8345 specialization: > >>>>First of all I would like to thank you for this comment.\A0 > >>>>-Dmytro > >>>>>virtualization -> networks/network > >>>>>\A0 > >>>>>device/links/interfaces/switches/vms are probably a mix of > >>>>>node/termmination-point/link extensions with conjunction with > >>>>>supporting-{topology,node,link}. > >>>>I can imagine mapping: > >>>>virtualization (ID) -> networks/network (RFC 8345) > >>>>links (ID)- >link;(RFC 8345) > >>>>ports (ID)-> termination points;(RFC 8345) > >>>>But still.. it seems here we have to create extension of the model = proposed in RFC 8345. > >>>>Precisely for node (RFC 8345) we may add types (switches, vms) and = futer add leafs /listsfor type if required (ex: #RAM,#vCPUs and other = leafs for VMs) > >>>>-Dmytro > >>>>>How would the draft relate to RFC8345? Should it perhaps call out = it is > >>>>>a different take on the similar problem, specialized to a = particular > >>>>>use-case? > >>>>One can suggest that\A0 in the RFC8345 Figure 1, the block = "service Topology model" can include the proposed in the draft network = service descriptor with appropriate modification of mapping according to = the RFC8345.. > >>>> > >>>>Meanwhile I find that the proposed solution(ID) try to solve the = problem descibed below: > >>>> > >>>>The uCPE management mechanism may involve not only YANG modules = but\A0 also the speficif logic written in programming languages. The = proposed organisation of yang model is an attempt to find the best = fit\A0 for combination (YANG modules + specific logic written in python = for example )\A0 to manage different existing NFVIs in the uCPE (by the = orchestrator). > >>>> > >>>>In the case of uCPE, the mapping (w/wo additinal logic) of = "variables " between service yang modules (in the orchestrator) and = NETCONF payload(that is sent to the uCPE) will be more complex (requires = additional transformations in the logic) with generic approach, then the = solution presented in the ID, that is tailored to the uCPE.\A0 > >>>> > >>>>Therefore I find the proposed solution as a stadalone generic = approach to manage multiple vendor uCPE that appears to be a particular = case tailored for uCPE NFVIs that may be not nesseraly follows RFC8345. = I would be pleased if you could comment this. > >>>> > >>>>-Dmytro > >>>>>Regards, > >>>>>Robert (with RFC8345 co-author hat on) > >>>>>+1, in addition, I am wondering whether this is something related = to overlay topology model, if yes, how it is different from DC Fabric = topology model defined in RFC8542?\A0 > >>>>>-Qin\A0 > >>>>Thank you for your comment. The RFC8542 condisers PODs in the DC = network. uCPE is located on the customer site. if we consider that uCPE = is A POD (with links and nodes like VMs and swithces) then in the = RFC8542 describes different PODs in the network that are interconnected = with links. The yang model proposed in the ID ifocuses only on the uCPE = interiour network service, not the interconnection between the uCPEs. = Aslo, I explained the difference about extension neded for type of = nodes,vms leafs and furter complexity in the mapping logic in the = reponce to Robert. > >>>>-Dmytro > >>>> > >>>>[Qin]:So you focus on interconnection between local vPE and remote = vPE? > >>>[Dmytro]: > >>>Thank you for this question. It seems that the next version of = draft should include the explanation of the uCPE interiour network = service. > >>>Example: We can have multiple VMs instantiated in the uCPE = (vFW,vRouter/vCPE,SD-WAN). With support of links and swithes\A0 VMs may = create a service chains. > >>>Example of service chains: > >>>1)WAN--vRouter(vCPE)-link-uCPEvSW -link2-vFirewall-LAN > >>>2)WAN--SDWAN--vFirewall--LAN > >>>>It is not clear whether we should distinguish VM from switch. In = my understanding, Upon VNF is instantiated, there is no difference = between virtual and physical worlds. > >>>[Dmytro]: > >>>The VM/VNF in the uCPE could be a vROuter or Vfirewall or an SD-WAN = that is not a default part of virtual network resources of the uCPE = (chapter 3 in the ID). > >>>The switch (ex. Open vSwith) in the uCPE is a default part of uCPE = network virtual resources (chapter 3 in the ID). > >>>Thus we need to distingish swithes and VNFs to not to mix uCPE = network virtual resources and VNFs. > >>>Another reason why the destingishing is required: because VM and SW = have different device-attributes. SW does not require VNFD attributtes. > >>>If we do not distinguish nodes, and only extend the grouping = "device attributes" for required attributes the switch will have the = properties that are\A0 unused leafs which represent the = VM-device-attributes. > >>>>VNF lifecycle management is separated from topology construction, = wrong? > >>>[Dmytro]: > >>>a) In case of the NFVIs uCPE the same High Level interface allows = to configure both topology construction and VM lifecycle management in = the same transaction. > >>>b) We can not activate Network Service Descriptor without = consituent VM node information. At the moment of NSD activation we = already have to set the VM node information such as VM capabilities that = can be created (previosly)/(at the moment of configuration of NSD) but = have to be a part of the network service descriptor at the moment of = activation. > >>>[Dmytro] > >>>The Internet Draft also defines the term uCPE that is not defined = at IETF yet. > >>>_______________________________________________ > >>>netmod mailing list > >>>netmod@ietf.org > >>>https://www.ietf.org/mailman/listinfo/netmod = > >> >=20 --Apple-Mail=_319879B5-F092-4973-994C-0057176FB446 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=utf-8 Hi = Dmytro,

First of = all, I find the discussion within the netmod WG as just the wrong place = to have this discussion. You will be hard pressed to find too many = people who can give you critical feedback on the model in this WG.

See = inline with [mj]

On Sep 5, 2019, at 2:03 PM, = Dmytro Shytyi <ietf.dmytro@shytyi.net> wrote:

[Dmytro]
Hello Mahesh Jethanandani,
Thank you for your comment.
Please find answers inline.

>I find the = representation of a service model in this draft for a uCPE as too = simple. In reality, on a uCPE, you could be running a Network Service = (NS), which is composed of multiple VNFs interconnected together. This = service model does not address such a configuration.
[Dmytro]
This = service model presented in the draft supports N VMs in the NS and = addreses configuration with multiple VMs and switches with plenty of = links. It is well tested (with service chained VMs) on equipent from = different well known suppliers. The idea to have complex flexible = service in the network service orchestrator for uCPE.
in the yang model we have list (marked = by pyang with "*") of VMs where the key is name of the vm, thus you may = define as much VM as you wish.

[mj] You have introduced concept of interfaces, ports, = and switches that does not exist in the NFV world. VNFs have virtual = links and connection points. There is no (physical) port or interface = that one connects to in a VNF. It might exist on the server on which the = VM runs but not in a VNF or a virtualization instance.


Example of 2 VMs that are service = chained (swLAN-VM1-swService-VM2-swWAN)

      +--rw vms* [vm]
          &nb= sp;           +--rw = vm            = string
          &nb= sp;           +--rw = ports* [port]
          &nb= sp;           |  = +--rw port    string
          &nb= sp;           |  = +--rw name?   string
          &nb= sp;           |  = +--rw link?   -> ../../../links/link
          &nb= sp;           +--rw = ram?           = string
          &nb= sp;           +--rw = cpu?           = string
          &nb= sp;           +--rw = storages* [id]
          &nb= sp;           |  = +--rw id          string
          &nb= sp;           |  = +--rw location?   string
          &nb= sp;           +--rw = day0-config
          &nb= sp;            = ;  +--rw location?        = string
          &nb= sp;            = ;  +--rw day0-var-path?   string
          &nb= sp;            = ;  +--rw variable* [name]
          &nb= sp;            = ;     +--rw name     string
          &nb= sp;            = ;     +--rw value?   string


So basically  the list "+--rw wms* = [vm]" can be represented/"expanded" in this way where the names and = number ov vms(N) is set by user:

 >>>>>       = +--rw = vm1            = ; string
        =                |    =  +--rw ports* [port]
  =                     =  |     |  +--rw port    = string
        =                |    =  |  +--rw name?   string
                =        |     |  +--rw = link?   -> ../../../links/link
                =        |     +--rw = ram?           = string
        =                |    =  +--rw = cpu?           = string
        =                |    =  +--rw storages* [id]
  =                     =  |     |  +--rw = id          string
          =              |    =  |  +--rw location?   string
                =        |     +--rw day0-config
          =              |    =  |  +--rw location?        = string
        =                |    =  |  +--rw day0-var-path?   string
          =              |    =  |  +--rw variable* [name]
                =        |    =  |     +--rw name     = string
        =                |    =  |     +--rw value?   string
>>>>>    =     +--rw = vm2            = ; string
        =                |    =  +--rw ports* [port]
  =                     =  |     |  +--rw port    = string
        =                |    =  |  +--rw name?   string
                =        |     |  +--rw = link?   -> ../../../links/link
                =        |     +--rw = ram?           = string
        =                |    =  +--rw = cpu?           = string
        =                |    =  +--rw storages* [id]
  =                     =  |     |    +--rw = id          string
          =              |    =  |  +--rw location?   string
                =        |     +--rw day0-config
          =              |    =  |    +--rw = location?        string
          =              |    =  |  +--rw day0-var-path?   string
          =              |    =  |  +--rw variable* [name]
                =        |    =  |     +--rw name     = string
        =                |    =  |     +--rw value?   string
          &nb= sp;            = ; ....
      =                 |    =                   
 >>>>>       = +--rw = vmN            = ; string
          &nb= sp;           =       +--rw ports* [port]
          &nb= sp;           =       |  +--rw port    = string
          &nb= sp;           =       |  +--rw name?   = string
          &nb= sp;           =       |  +--rw link?   = -> ../../../links/link
          &nb= sp;           =       +--rw = ram?           = string
          &nb= sp;           =       +--rw = cpu?           = string
          &nb= sp;           =       +--rw storages* [id]
          &nb= sp;           =       |  +--rw = id          string
          &nb= sp;           =       |  +--rw location?   = string
          &nb= sp;           =       +--rw day0-config
          &nb= sp;            = ;        +--rw = location?        string
          &nb= sp;            = ;        +--rw = day0-var-path?   string
          &nb= sp;            = ;        +--rw variable* [name]
          &nb= sp;            = ;           +--rw = name     string
          &nb= sp;            = ;           +--rw = value?   string

[mj] I understand how you instantiate multiple VMs. = What I do not understand is for example, your representation of a link. = Currently, it points to a link definition within the same Virtualization = instance. How does that tell me what is it connected to?

Why is CPU defined as a string? And what does = =E2=80=9CAmount of cpus=E2=80=9D mean? Number of CPUs? Same for = RAM.

Also VMs have images and storage. If your storage is an image, where is the = storage (disk) definition? 

Again, definition of CPUs, RAM, storage belong in = a VNF Descriptor (VNFD), not in a service model. One needs that = information at the time of instantiation of a VNF, not at the time of = turning up a service.


>Besides, how is the = configuration of a uCPE device for a VNF different from configuration of = a VNF in a provider Network Function Virtualization Infrastructure = (NFVI) like OpenStack or VMware VIO?
[Dmytro]
Modern uCPE support netconf. = And if you go to the YANG RFC6020 you will find the next statement:
   "YANG is a data modeling = language used to model configuration and
   state data manipulated by the Network = Configuration Protocol
   = (NETCONF), NETCONF remote procedure calls, and NETCONF = notifications."
When we talk about = Openstack it is YAML, not YANG. 

[mj] If I give you a YANG model to configure OpenStack, = tell me how would that be different from configuring a = uCPE?


>And would you not need to enable = the service on the provider side to make the services running on the = uCPE functional?
[Dmytro]
Indeed, to manage the uCPE located on = the client side we need to enable the provider side. The presented model = is this actually "sits" in orchestaror that is located on the provider = side. In the draft it is mentioned that it is "network service yang = model- NSYM" that is in the orchestrator (according to the rfc8199).

[mj] By sitting in the orchestrator, you have not = defined how the service on the provider side is enabled.


>There is significant amount of work = that has been done in ETSI on the configuration and management of VNF = and NS. Authors should spend some time going through the specifications = specified by ETSI to make sure they are not re-specifying work that has = been done there, and instead see how they could augment the work that = has already been defined.
[Dmytro]
The uCPE management mechanism(in the service = provider network service orchestrator)  may involve not only YANG = modules but also the speficic logic written in programming languages. = The proposed organisation of yang model is a solution that provides the = best fit for combination (YANG modules + specific logic written in = python for example )  to manage different existing NFVIs in the = uCPE (by the orchestrator).

[mj] IETF does not specify implementation or logic = written in a programming language.


In = the case of uCPE, the mapping (w/wo additinal logic) of "variables " = between service yang modules (in the orchestrator) and NETCONF = payload(that is sent to the uCPE) will be more complex (requires = additional transformations in the logic) with generic approach, then the = solution presented in the ID, that is tailored to the uCPE.Therefore I = find the proposed solution as a stadalone generic approach to manage = multiple vendor uCPE that appears to be a particular case tailored for = uCPE NFVIs that may be not nesseraly follows RFC8345. I would be pleased = if you could comment this.

[mj] To me this sounds like an implementation level = detail for a uCPE. Again, not something that IETF = standardizes. 



>Authors can start by going through IFA010,  IFA011, = IFA014, and its YANG specification in SOL006.
[Dmytro]
I would like to draw your = attention that these documents seems to be directed to the generic = solution including also cloud environment, that brings a lot of = complexity. There is some difference between cloud and client site.
For example, case for VNFD, in the = cloud we need to have flavours, different VDUs For VNFD, to change the = VM capacities according to the load as we have the extendible = infrastructure.
The ucpe has limited = resources, not as a cloud infrastructure in the data center.

[mj] Define a single flavor in case of uCPE and keep it = simple.

For = example, in the case of NSD: NSD includes the VLD that defines Virtual = Links. But in the uCPE case you may have virtual links + virtual = switches that are not part of the NSD defined in the ETSI.

[mj] But you are allowed to define more than 2 links. = Why do you need to define a switch?

For example, i'm not avare of VNFD = that brings option of (0day configuration)/bootstrap for VNF. Moreover = in the proposed model there is a possibility to set variables that will = be substituted in the ".iso" bootstrap image (ex.cloudinit) that is = assigned to the VM in the uCPE.

[mj] That is considered part of the workflow. Your = workflow engine will allow you to set variables that are substituted in = the ISO image or when the image boots up.

Thus the = generic solution of ETSI leads to more complex implementations of the = code that is responsible for mapping between YANG/XML when the solution = proposed in the Inernet Draft is tailored to the uCPE use-case and = should bring the simplisity when developping the mapping logic and = inroduce features that are not presented by ETSI.
The Internet Draft also defines the term uCPE that is not = defined at IETF yet.

[mj] I do not think this is the right WG or even the = right body to standardize this model.


Mahesh = Jethanandani
mjethanandani@gmail.com


>>On Sep 5, 2019, at 9:02 AM, Dmytro Shytyi <ietf.dmytro@shytyi.net> wrote:
>>Dear All,
>>Please find the updated version of the VYSM Internet = Draft(v0.2).
>>The new version = of draft introduces an extension of the yang model defined in previous = version. =46rom now the VYSM supports (0day configuration)/(bootstrap) = of the VNFs hosted in the uCPE.
>>With 0day configuration in the uCPE we can setup = minimal required configuration of vRouter (such as ip address, = hostname,etc..), SD-WAN (address of the SD-WAN manager, dhcp activation, = etc..), etc..
>>Details:
>>A new version of I-D, = draft-shytyi-netmod-vysm-02.txt\A0
>>has been successfully submitted by Dmytro Shytyi and = posted to the\A0
>>IETF = repository.\A0
>>Name:\A0\A0\A0\A0\A0\A0\A0\A0draft-shytyi-netmod-vysm\A= 0
>>Revision:\A0\A0\A0\A002\A0
>>Title:\A0\A0\A0\A0\A0\A0\A0\A0Virtualization YANG = Servise Model (VYSM)\A0
>>Document date:\A0\A0\A0\A02019-09-04\A0
>>Group:\A0\A0\A0\A0\A0\A0\A0\A0Individual = Submission\A0
>>Pages:\A0\A0\A0\A0\A0\A0\A0\A010\A0
>>URL: https://www.ietf.org/internet-drafts/draft-shytyi-netmod-vysm-0= 2.txt\A0
>>Status: https://datatracker.ietf.org/doc/draft-shytyi-netmod-vysm/\A0
>>Htmlized: https://tools.ietf.org/html/draft-shytyi-netmod-vysm-02\A0<= br class=3D"">
>>Htmlized: https://datatracker.ietf.org/doc/html/draft-shytyi-netmod-vysm\= A0
>>Diff: https://www.ietf.org/rfcdiff?url2=3Ddraft-shytyi-netmod-vysm-02= \A0
>>Abstract:\A0
>>
>>This document provides a specification of the Virtual = Network\A0
>>
>>Functions YANG Service Model = (VYSM). The VNF YANG Service Model\A0
>>
>>serves = as a base framework for managing an universal Customer-\A0
>>
>>Premises Equipment (uCPE) NFV subsystem from the = Orchestrator.\A0
>>>>
>>>># # # : Dmytro Shytyi = [mailto:ietf.dmytro@shytyi.net]
>>>># # # # : 2019# 8# 28#\A0 21:46
>>>># # # : Robert Varga = <nite@hq.sk>; Qin Wu <bill.wu@huawei.com>
>>>># # : netmod <netmod@ietf.org>
>>>># # : Re: [netmod] New = Version draft-shytyi-netmod-vysm-02.txt as Working Group document.
>>>>
>>>>Hello,
>>>>
>>>>Please find comments inline.
>>>>>On 27/08/2019 = 18:03, Dmytro Shytyi wrote:
>>>>>> Dear All,
>>>>>>\A0
>>>>>> I am one of the authors of ID VYSM = and I would like to draw your
>>>>>> attention to the evolution of the
>>>>>> = draft\A0https://www.ietf.org/internet-drafts/draft-shytyi-netmod-vysm-01.txt.
>>>>>> Recently = we produced (but did not submitted yet) a new version of ID
>>>>>> (02) and I = beleive it fits the netmod working group.
>>>>>>\A0
>>>>>> We would be gratefull if you could = suggest if the new version(02) of the
>>>>>> document\A0 could become an official = work item of the WG?
>>>>>> \A0 \A0 \A0 If yes, could you please = indicate which modifications must be done
>>>>>> in the document before submition.
>>>>>\A0
>>>>>Hmm, looking over = the model, it would seem there is quite a bit of
>>>>>overlap with RFC8345 -- to the point I = believe the model could be
>>>>>formulated in terms of RFC8345 = specialization:
>>>>First = of all I would like to thank you for this comment.\A0
>>>>-Dmytro
>>>>>virtualization = -> networks/network
>>>>>\A0
>>>>>device/links/interfaces/switches/vms are = probably a mix of
>>>>>node/termmination-point/link extensions = with conjunction with
>>>>>supporting-{topology,node,link}.
>>>>I can imagine = mapping:
>>>>virtualization (ID) -> networks/network = (RFC 8345)
>>>>links = (ID)- >link;(RFC 8345)
>>>>ports (ID)-> termination points;(RFC = 8345)
>>>>But still.. it = seems here we have to create extension of the model proposed in RFC = 8345.
>>>>Precisely for = node (RFC 8345) we may add types (switches, vms) and futer add leafs = /listsfor type if required (ex: #RAM,#vCPUs and other leafs for VMs)
>>>>-Dmytro
>>>>>How would the draft = relate to RFC8345? Should it perhaps call out it is
>>>>>a different take on = the similar problem, specialized to a particular
>>>>>use-case?
>>>>One can suggest that\A0 in the RFC8345 Figure = 1, the block "service Topology model" can include the proposed in the = draft network service descriptor with appropriate modification of = mapping according to the RFC8345..
>>>>
>>>>Meanwhile I find that the proposed = solution(ID) try to solve the problem descibed below:
>>>>
>>>>The uCPE management mechanism may involve = not only YANG modules but\A0 also the speficif logic written in = programming languages. The proposed organisation of yang model is an = attempt to find the best fit\A0 for combination (YANG modules + specific = logic written in python for example )\A0 to manage different existing = NFVIs in the uCPE (by the orchestrator).
>>>>
>>>>In the case of uCPE, the mapping (w/wo = additinal logic) of "variables " between service yang modules (in the = orchestrator) and NETCONF payload(that is sent to the uCPE) will be more = complex (requires additional transformations in the logic) with generic = approach, then the solution presented in the ID, that is tailored to the = uCPE.\A0
>>>>
>>>>Therefore I find the = proposed solution as a stadalone generic approach to manage multiple = vendor uCPE that appears to be a particular case tailored for uCPE NFVIs = that may be not nesseraly follows RFC8345. I would be pleased if you = could comment this.
>>>>
>>>>-Dmytro
>>>>>Regards,
>>>>>Robert (with RFC8345 co-author hat on)
>>>>>+1, in addition, I = am wondering whether this is something related to overlay topology = model, if yes, how it is different from DC Fabric topology model defined = in RFC8542?\A0
>>>>>-Qin\A0
>>>>Thank you for your comment. The RFC8542 = condisers PODs in the DC network. uCPE is located on the customer site. = if we consider that uCPE is A POD (with links and nodes like VMs and = swithces) then in the RFC8542 describes different PODs in the network = that are interconnected with links. The yang model proposed in the ID = ifocuses only on the uCPE interiour network service, not the = interconnection between the uCPEs. Aslo, I explained the difference = about extension neded for type of nodes,vms leafs and furter complexity = in the mapping logic in the reponce to Robert.
>>>>-Dmytro
>>>>
>>>>[Qin]:So you focus on interconnection between = local vPE and remote vPE?
>>>[Dmytro]:
>>>Thank you for this question. It seems that the = next version of draft should include the explanation of the uCPE = interiour network service.
>>>Example: We can have multiple VMs instantiated in = the uCPE (vFW,vRouter/vCPE,SD-WAN). With support of links and swithes\A0 = VMs may create a service chains.
>>>Example of service chains:
>>>1)WAN--vRouter(vCPE)-link-uCPEvSW = -link2-vFirewall-LAN
>>>2)WAN--SDWAN--vFirewall--LAN
>>>>It is not clear whether = we should distinguish VM from switch. In my understanding, Upon VNF is = instantiated, there is no difference between virtual and physical = worlds.
>>>[Dmytro]:
>>>The VM/VNF in the uCPE = could be a vROuter or Vfirewall or an SD-WAN that is not a default part = of virtual network resources of the uCPE (chapter 3 in the ID).
>>>The switch (ex. Open = vSwith) in the uCPE is a default part of uCPE network virtual resources = (chapter 3 in the ID).
>>>Thus we need to distingish swithes and VNFs to = not to mix uCPE network virtual resources and VNFs.
>>>Another reason why the = destingishing is required: because VM and SW have different = device-attributes. SW does not require VNFD attributtes.
>>>If we do not distinguish = nodes, and only extend the grouping "device attributes" for required = attributes the switch will have the properties that are\A0 unused leafs = which represent the VM-device-attributes.
>>>>VNF lifecycle management is separated from = topology construction, wrong?
>>>[Dmytro]:
>>>a) In case of the NFVIs uCPE the same High Level = interface allows to configure both topology construction and VM = lifecycle management in the same transaction.
>>>b) We can not activate Network Service Descriptor = without consituent VM node information. At the moment of NSD activation = we already have to set the VM node information such as VM capabilities = that can be created (previosly)/(at the moment of configuration of NSD) = but have to be a part of the network service descriptor at the moment of = activation.
>>>[Dmytro]
>>>The Internet Draft also = defines the term uCPE that is not defined at IETF yet.
>>>_______________________________________________
>>>netmod mailing list
>>>netmod@ietf.org
>>>https://www.ietf.org/mailman/listinfo/netmod
>>





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Fri, 6 Sep 2019 15:18:39 +0800 From: "Fengchong (frank)" To: "netmod@ietf.org" CC: Yangshouchuan , Yangang , Qin Wu Thread-Topic: =?gb2312?B?UGxlYXNlIGNsYXJpZnkgaW1wbGVtZW50YXRpb24gYWJvdXQgoa53aGVuoa8g?= Thread-Index: AdVkgxkxStdW26xJTo+kz8dBb3TuVg== Date: Fri, 6 Sep 2019 07:18:39 +0000 Message-ID: <5756FB984666AD4BB8E1D63E2E3AA3D001F20F2C@dggemm513-mbs.china.huawei.com> Accept-Language: en-US Content-Language: zh-CN X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.134.40.226] Content-Type: multipart/alternative; boundary="_000_5756FB984666AD4BB8E1D63E2E3AA3D001F20F2Cdggemm513mbschi_" MIME-Version: 1.0 X-CFilter-Loop: Reflected Archived-At: Subject: [netmod] =?gb2312?b?UGxlYXNlIGNsYXJpZnkgaW1wbGVtZW50YXRpb24gYWJv?= =?gb2312?b?dXQgoa53aGVuoa8=?= X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 06 Sep 2019 07:19:01 -0000 --_000_5756FB984666AD4BB8E1D63E2E3AA3D001F20F2Cdggemm513mbschi_ Content-Type: text/plain; charset="gb2312" Content-Transfer-Encoding: base64 SGkgYWxsLA0KDQpJbiBSRkM3OTUwIHNlY3RvbiA4LCBzZXZlcmFsIGRlc2NyaXB0aW9uIGFib3V0 IHdoZW6jug0KSW4gc2VjdGlvbiA4LjI8aHR0cHM6Ly90b29scy5pZXRmLm9yZy9odG1sL3JmYzc5 NTAjc2VjdGlvbi04LjI+LiAgQ29uZmlndXJhdGlvbiBEYXRhIE1vZGlmaWNhdGlvbnMNCiAgIG8g IElmIGEgcmVxdWVzdCBtb2RpZmllcyBhIGNvbmZpZ3VyYXRpb24gZGF0YSBub2RlIHN1Y2ggdGhh dCBhbnkNCiAgICAgIG5vZGUncyAid2hlbiIgZXhwcmVzc2lvbiBiZWNvbWVzIGZhbHNlLCB0aGVu IHRoZSBub2RlIGluIHRoZSBkYXRhDQogICAgICB0cmVlIHdpdGggdGhlICJ3aGVuIiBleHByZXNz aW9uIGlzIGRlbGV0ZWQgYnkgdGhlIHNlcnZlci4NCkluIDguMy4xPGh0dHBzOi8vdG9vbHMuaWV0 Zi5vcmcvaHRtbC9yZmM3OTUwI3NlY3Rpb24tOC4zLjE+LiAgUGF5bG9hZCBQYXJzaW5nDQoNCiAg IG8gIElmIGRhdGEgZm9yIGEgbm9kZSB0YWdnZWQgd2l0aCAid2hlbiIgaXMgcHJlc2VudCBhbmQg dGhlICJ3aGVuIg0KDQogICAgICBjb25kaXRpb24gZXZhbHVhdGVzIHRvICJmYWxzZSIsIHRoZSBz ZXJ2ZXIgTVVTVCByZXBseSB3aXRoIGFuDQoNCiAgICAgICJ1bmtub3duLWVsZW1lbnQiIDxlcnJv ci10YWc+IGluIHRoZSA8cnBjLWVycm9yPi4NCg0KSW4gOC4zLjI8aHR0cHM6Ly90b29scy5pZXRm Lm9yZy9odG1sL3JmYzc5NTAjc2VjdGlvbi04LjMuMj4uICBORVRDT05GIDxlZGl0LWNvbmZpZz4g UHJvY2Vzc2luZw0KDQpNb2RpZmljYXRpb24gcmVxdWVzdHMgZm9yIG5vZGVzIHRhZ2dlZCB3aXRo ICJ3aGVuIiwgYW5kIHRoZSAid2hlbiINCg0KICAgICAgY29uZGl0aW9uIGV2YWx1YXRlcyB0byAi ZmFsc2UiLiAgSW4gdGhpcyBjYXNlLCB0aGUgc2VydmVyIE1VU1QNCg0KICAgICAgcmVwbHkgd2l0 aCBhbiAidW5rbm93bi1lbGVtZW50IiA8ZXJyb3ItdGFnPiBpbiB0aGUgPHJwYy1lcnJvcj4uDQoN CllBTkcgbW9kdWxlo7oNCm1vZHVsZSBmb28gew0KICAgbmFtZXNwYWNlIKGwaHR0cDovL2Zvby5j b22hsTsNCiAgIHByZWZpeCChsGZvb6GxOw0KTGVhZiBhIHuhrX0NCkxlYWYgYiB7DQogIFdoZW4g obBhID0gMTChsTsNCn0NCn0NClNjZW5lIDE6DQpUaGUgZmlyc3QgZWRpdC1jb25maWcgcmVxdWVz dDoNCjxlZGl0LWNvbmZpZz4NCiAgIDx0YXJnZXQ+DQogICAgICA8Y2FuZGlkYXRlLz4NCiAgIDwv dGFyZ2V0Pg0KICAgPGNvbmZpZz4NCiAgICAgIDxhIHhtbG5zPSChsGh0dHA6Ly9mb28uY29tobE+ MzwvYT4NCiAgIDwvY29uZmlnPg0KPC9lZGl0LWNvbmZpZz4NClRoaXMgcmVxdWVzdCB3aWxsIHNl dCBhID0gMy4NCg0KVGhlIHNlY29uZCByZXF1ZXN0Og0KPGVkaXQtY29uZmlnPg0KICAgPHRhcmdl dD4NCiAgICAgIDxjYW5kaWRhdGUvPg0KICAgPC90YXJnZXQ+DQogICA8Y29uZmlnPg0KICAgICAg PGEgeG1sbnM9IKGwaHR0cDovL2Zvby5jb22hsT4xMDwvYT4NCiAgICAgIDxiIHhtbG5zPSChsGh0 dHA6Ly9mb28uY29tobE+NTwvYj4NCiAgIDwvY29uZmlnPg0KPC9lZGl0LWNvbmZpZz4NCg0KQWNj b3JkaW5nIDguMy4xLCBpbiBycGMgcGF5bG9hZCBwYXJzaW5nIHBoYXNlLCB0aGUgYaGvcyB2YWx1 ZSBpbiBjYW5kaWRhdGUgZGF0YXN0b3JlIGlzIDMsc28gbGVhZiBioa9zIHdoZW4gY29uZGl0aW9u IGlzIGV2YWx1YXRlZCB0byBmYWxzZSwgc2VydmVyIHdpbGwgcmVwb3J0IKGudW5rbm93bi1lbGVt ZW50oa8gZXJyb3IuDQpJcyBpdCBleHBlY3RlZCBieSB1c2VyPw0KU2NlbmUgMjoNClRoZSBmaXJz dCBlZGl0LWNvbmZpZyByZXF1ZXN0Og0KPGVkaXQtY29uZmlnPg0KICAgPHRhcmdldD4NCiAgICAg IDxjYW5kaWRhdGUvPg0KICAgPC90YXJnZXQ+DQogICA8Y29uZmlnPg0KICAgICAgPGEgeG1sbnM9 IKGwaHR0cDovL2Zvby5jb22hsT4xMDwvYT4NCiAgIDwvY29uZmlnPg0KPC9lZGl0LWNvbmZpZz4N ClRoaXMgcmVxdWVzdCB3aWxsIHNldCBhID0gMTAuDQoNClRoZSBzZWNvbmQgcmVxdWVzdDoNCjxl ZGl0LWNvbmZpZz4NCiAgIDx0YXJnZXQ+DQogICAgICA8Y2FuZGlkYXRlLz4NCiAgIDwvdGFyZ2V0 Pg0KICAgPGNvbmZpZz4NCiAgICAgIDxhIHhtbG5zPSChsGh0dHA6Ly9mb28uY29tobE+MzwvYT4N CiAgICAgIDxiIHhtbG5zPSChsGh0dHA6Ly9mb28uY29tobE+NTwvYj4NCiAgIDwvY29uZmlnPg0K PC9lZGl0LWNvbmZpZz4NCkFjY29yZGluZyA4LjMuMSwgaW4gcnBjIHBheWxvYWQgcGFyc2luZyBw aGFzZSwgdGhlIGGhr3MgdmFsdWUgaW4gY2FuZGlkYXRlIGRhdGFzdG9yZSBpcyAxMCwgc28gbGVh ZiBioa9zIHdoZW4gY29uZGl0aW9uIGlzIGV2YWx1YXRlZCB0byB0cnVlLCBzZXJ2ZXIgd2lsbCBh Y2NlcHQgdGhpcyByZXF1ZXN0IGluIHBheWxvYWQgcGFyc2luZyBwaGFzZS4NCg0KSW4gZWRpdC1j b25maWcgcmVxdWVzdCBwcm9jZXNzaW5nIHBoYXNlLCBpZiBsZWFmIGGhr3MgbW9kaWZpY2F0aW9u IGlzIHByb2Nlc3NlZCBmaXJzdGx5LCB0aGUgYaGvcyB2YWx1ZSB3aWxsIGJlIGNoYW5nZWQgdG8g Mywgc28gdGhlIGKhr3Mgd2hlbiBjb25kaXRpb24gd2lsbCBiZSBmYWxzZSwgd2hlbiBzZXJ2ZXIg cHJvY2VzcyBioa9zIG1vZGlmaWNhdGlvbiwgYiB3aWxsIGJlIHRyZWF0ZWQgYXMgdW5rbm93bi1l bGVtZW50LCB0aGUgZWRpdC1jb25maWcgcmVxdWVzdCB3aWxsIGZhaWwuDQpJZiBsZWFmIGKhr3Mg bW9kaWZpY2F0aW9uIGlzIHByb2Nlc3NlZCBmaXJzdGx5LCBzZXJ2ZXIgd2lsbCBhY2NlcHQgdGhp cyBtb2RpZmljYXRpb24gLGJlY2F1c2UgYqGvcyB3aGVuIGNvbmRpdGlvbiBpcyB0cnVlLCBhbmQg d2hlbiBzZXJ2ZXIgcHJvY2VzcyBhoa9zIG1vZGlmaWNhdGlvbiAsIHRoaXMgbW9kaWZpY2F0aW9u IHdpbGwgYmUgYWNjZXB0ZWQsIGFuZCBioa9zIHdoZW4gY29uZGl0aW9uIHdpbGwgYmUgZXZhbHVh dGVkIHRvIGZhbHNlLCBsZWFmIGIgd2lsbCBiZSBkZWxldGVkIGF1dG9tYXRpY2FsbHksIHRoZSBl ZGl0LWNvbmZpZyByZXF1ZXN0IHdpbGwgYmUgT0suDQoNCkhvdyBzZXJ2ZXIgc2hvdWxkIHByb2Nl c3MgdGhpcyBzaXR1YXRpb24/DQoNCg== --_000_5756FB984666AD4BB8E1D63E2E3AA3D001F20F2Cdggemm513mbschi_ Content-Type: text/html; charset="gb2312" Content-Transfer-Encoding: quoted-printable

Hi all,

 

In RFC7950 secton 8, several de= scription about when=A3=BA<= /span>

In section 8.2.  Configuration Data Modifications

=    o  If a request modifies a configuration data node such t= hat any

=       node's "when" expression becomes f= alse, then the node in the data

=       tree with the "when" expression is= deleted by the server.

In 8.3.1.  Payload Parsing

 &nbs=
p; o  If data for a node tagged with "when" is present and t=
he "when"
 &nbs=
p;    condition evaluates to "false", the server M=
UST reply with an
 &nbs=
p;    "unknown-element" <error-tag> in the &=
lt;rpc-error>.

In 8.3.2.  NETCONF <edit-config> Processing

Modificati=
on requests for nodes tagged with "when", and the "when"=
;
 &nbs=
p;    condition evaluates to "false".  In thi=
s case, the server MUST
 &nbs=
p;    reply with an "unknown-element" <error-ta=
g> in the <rpc-error>.

 

YANG module=A3=BA=

module foo {<= /p>

   namespace =A1=B0ht= tp://foo.com=A1=B1;

   prefix =A1=B0foo= =A1=B1;

L= eaf a {=A1=AD}

L= eaf b {

&= nbsp; When =A1=B0a =3D 10=A1=B1;

}=

}

Scene 1:

The first edit-config request:<= o:p>

<edit-config><= /span>

   <target>

      = <candidate/>

   </target>

   <config>= ;

      = <a xmlns=3D =A1=B0http://foo.com=A1=B1>3</a><= /p>

   </config>

</edit-config>=

This request will set a =3D 3.<= o:p>

 

The second request:<= /span>

<edit-config><= /span>

   <target>

      = <candidate/>

   </target>

   <config>= ;

      = <a xmlns=3D =A1=B0http://foo.com=A1=B1>10</a>=

      = <b xmlns=3D =A1=B0http://foo.com=A1=B1>5</b><= /p>

   </config>

</edit-config>=

 

Acco= rding 8.3.1, in rpc payload parsing phase, the a=A1=AFs value in candidate = datastore is 3,so leaf b=A1=AFs when condition is evaluated to false, serve= r will report =A1=AEunknown-element=A1=AF error.

Is i= t expected by user?

Scene 2:

The first edit-config request:<= o:p>

<edit-config><= /span>

   <target>

      = <candidate/>

   </target>

   <config>= ;

      = <a xmlns=3D =A1=B0http://foo.com=A1=B1>10</a>=

   </config>

</edit-config>=

This request will set a =3D 10.=

 

The second request:<= /span>

<edit-config><= /span>

   <target>

      = <candidate/>

   </target>

   <config>= ;

      = <a xmlns=3D =A1=B0http://foo.com=A1=B1>3</a><= /p>

      = <b xmlns=3D =A1=B0http://foo.com=A1=B1>5</b><= /p>

   </config>

</edit-config>=

Acco= rding 8.3.1, in rpc payload parsing phase, the a=A1=AFs value in candidate = datastore is 10, so leaf b=A1=AFs when condition is evaluated to true, serv= er will accept this request in payload parsing phase.

 

In e= dit-config request processing phase, if leaf a=A1=AFs modification is proce= ssed firstly, the a=A1=AFs value will be changed to 3, so the b=A1=AFs when= condition will be false, when server process b=A1=AFs modification, b will be treated as unknown-element, the edit-config request will fail. <= o:p>

If l= eaf b=A1=AFs modification is processed firstly, server will accept this mod= ification ,because b=A1=AFs when condition is true, and when server process= a=A1=AFs modification , this modification will be accepted, and b=A1=AFs when condition will be evaluated to false, leaf b will be del= eted automatically, the edit-config request will be OK.

 

How = server should process this situation?

 

--_000_5756FB984666AD4BB8E1D63E2E3AA3D001F20F2Cdggemm513mbschi_-- From nobody Fri Sep 6 00:25:20 2019 Return-Path: X-Original-To: netmod@ietfa.amsl.com Delivered-To: netmod@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id F29F612007C for ; Fri, 6 Sep 2019 00:25:18 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.899 X-Spam-Level: X-Spam-Status: No, score=-1.899 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id M8eYywZbc017 for ; Fri, 6 Sep 2019 00:25:17 -0700 (PDT) Received: from mail.tail-f.com (mail.tail-f.com [46.21.102.45]) by ietfa.amsl.com (Postfix) with ESMTP id F3D5B12002E for ; Fri, 6 Sep 2019 00:25:16 -0700 (PDT) Received: from localhost (h-46-233.A165.priv.bahnhof.se [46.59.46.233]) by mail.tail-f.com (Postfix) with ESMTPSA id 868C01AE0187; Fri, 6 Sep 2019 09:25:15 +0200 (CEST) Date: Fri, 06 Sep 2019 09:25:15 +0200 (CEST) Message-Id: <20190906.092515.2154852591644890692.mbj@tail-f.com> To: auerswal@unix-ag.uni-kl.de Cc: kent+ietf@watsen.net, netmod@ietf.org From: Martin Bjorklund In-Reply-To: <20190905163216.GA3497@unix-ag.uni-kl.de> References: <0100016d01f89905-2d99967e-a660-4ae2-a0a3-1fd270ad4a07-000000@email.amazonses.com> <20190905.171730.1203130976409295649.mbj@tail-f.com> <20190905163216.GA3497@unix-ag.uni-kl.de> X-Mailer: Mew version 6.7 on Emacs 25.2 / Mule 6.0 (HANACHIRUSATO) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Archived-At: Subject: Re: [netmod] Alissa Cooper's Abstain on draft-ietf-netmod-artwork-folding-09: (with COMMENT) X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 06 Sep 2019 07:25:19 -0000 Erik Auerswald wrote: > Hi Martin, > > On Thu, Sep 05, 2019 at 05:17:30PM +0200, Martin Bjorklund wrote: > > Kent Watsen wrote: > > > > > > >> There has been discussion about how embedding YANG models in RFCs seems like a > > > >> poor fit for a number of reasons. By standardizing line-folding mechanisms and > > > >> claiming them as a best practice, this document reinforces the root of that > > > >> problem rather than trying to fix it. > > > > > > > > Well said, I agree with Alissa's conclusion. > > > > But the algorithm in the document isn't supposed to be used for YANG > > modules. It is supposed to be used primarily for XML and JSON > > snippets (etc). > > Technically, XML and JSON are whitespace-agnostic Whitespaces are significant in XML element values, which means that we have to write e.g. 2013-04-01T03:00:00+00:00 With indentation for readability we quickly run out of horizontal space. > and often can be > "folded" manually without any folding indicators. That seems to be > true for YANG as well. It is true for YANG, which is why I wrote that this algorithm isn't supposed to be used for YANG. In fact, the document says: It is RECOMMENDED that authors do as much as possible within the selected format to avoid long lines. > Even Python code usually can be kept under any > reasonable line length. > > Very long names or values could require algorithmic folding, i.e., > a generic line-folding mechanism. > > I personally would try to keep the line length of any code inside an > RFC short enough to not need additional algorithmic folding. But if > this does not work, e.g., because some name or value is just too long, > having a recommended algorithm seems to be better than every author > making up another ad-hoc folding scheme. > > The I-D.ietf-netmod-artwork-folding seems to try to provide a recommended > algorithm for the case where a generic line-folding mechanism is needed. Exactly! /martin > > Overly long lines sometimes result in lost information in HTML or PDF > documents, if a complex layout is used, but no mechanism for dealing with > unexpectedly long lines is included. I have seen too many examples of > this to believe that this cannot happen with RFCs. > > Thanks, > Erik > From nobody Fri Sep 6 12:06:29 2019 Return-Path: X-Original-To: netmod@ietfa.amsl.com Delivered-To: netmod@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 6706E120A02; Fri, 6 Sep 2019 12:06:20 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -4.2 X-Spam-Level: X-Spam-Status: No, score=-4.2 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 7B64X6YJdZnN; Fri, 6 Sep 2019 12:06:18 -0700 (PDT) Received: from rfc-editor.org (rfc-editor.org [4.31.198.49]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id ADF9B120A06; Fri, 6 Sep 2019 12:06:18 -0700 (PDT) Received: by rfc-editor.org (Postfix, from userid 30) id A3648B80C67; Fri, 6 Sep 2019 12:05:55 -0700 (PDT) To: daedulus@btconnect.com, andy@yumaworks.com X-PHP-Originating-Script: 30:errata_mail_lib.php From: RFC Errata System Cc: warren@kumari.net, iesg@ietf.org, netmod@ietf.org, rfc-editor@rfc-editor.org Content-Type: text/plain; charset=UTF-8 Message-Id: <20190906190555.A3648B80C67@rfc-editor.org> Date: Fri, 6 Sep 2019 12:05:55 -0700 (PDT) Archived-At: Subject: [netmod] [Errata Verified] RFC8407 (5800) X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 06 Sep 2019 19:06:21 -0000 The following errata report has been verified for RFC8407, "Guidelines for Authors and Reviewers of Documents Containing YANG Data Models". -------------------------------------- You may review the report below and at: https://www.rfc-editor.org/errata/eid5800 -------------------------------------- Status: Verified Type: Editorial Reported by: tom Petch Date Reported: 2019-07-31 Verified by: Warren Kumari (Ops AD) (IESG) Section: appendix b Original Text ------------- "WG Web: ..... (http://trustee.ietf.org/license-info). Corrected Text -------------- "WG Web: ..... (https://trustee.ietf.org/license-info). Notes ----- Appendix A rightly says that these URL should have a scheme of https: but Appendix B wrongly specifies http: [WK]: I'm marking this as 'Verified' (instead of "Hold for Document Update") as it is in a template which is likely to be copied and pasted, and this seems like it may get more visibility. -------------------------------------- RFC8407 (draft-ietf-netmod-rfc6087bis-20) -------------------------------------- Title : Guidelines for Authors and Reviewers of Documents Containing YANG Data Models Publication Date : October 2018 Author(s) : A. Bierman Category : BEST CURRENT PRACTICE Source : Network Modeling Area : Operations and Management Stream : IETF Verifying Party : IESG From nobody Fri Sep 6 12:27:57 2019 Return-Path: X-Original-To: netmod@ietfa.amsl.com Delivered-To: netmod@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 419F8120A98 for ; Fri, 6 Sep 2019 12:27:56 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.899 X-Spam-Level: X-Spam-Status: No, score=-1.899 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=kumari-net.20150623.gappssmtp.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 3j7Fb55huasy for ; Fri, 6 Sep 2019 12:27:53 -0700 (PDT) Received: from mail-qk1-x741.google.com (mail-qk1-x741.google.com [IPv6:2607:f8b0:4864:20::741]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 7C49F120A90 for ; Fri, 6 Sep 2019 12:27:53 -0700 (PDT) Received: by mail-qk1-x741.google.com with SMTP id x134so6819553qkb.0 for ; Fri, 06 Sep 2019 12:27:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kumari-net.20150623.gappssmtp.com; s=20150623; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc:content-transfer-encoding; bh=lMhB8LbPQRmwSil3CF/3eDmW72pZXOC2x0Os4s65UD0=; b=vMpO7khKEzdR1coh5IgnhQLX8cYfPNRoHwJrMmEYqDMv6SnM0r5QqWhMZzb7Ob0Ytz CnXc24/Fwm0ujU61NMSDjk+XG9Tids7AfAEc6eDvciZ6W+5xNPy6usCtyaMX3g6Taa5I iI/5oi4aN4bbhrkY+QH8lbP87UqArZuwBuPwxAfudy7ChKxd1GdSlsD/h2oRx3l43bzs CHtmb2C7bEcnSQq7jlUm7bcxz7RLYL4fLjI5zrDKGseQ8bImcMrnHHugA/D8ErLrnLzC +cmV7hPmqlPxrg+jcUSbgf85dMX8DcH0HfOZzlVbpHsu5RWo+h8kIbN9+rdNYXA7LaXD ceYg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc:content-transfer-encoding; bh=lMhB8LbPQRmwSil3CF/3eDmW72pZXOC2x0Os4s65UD0=; b=hErrkqNhgXjiK1I66ontgJcR2d6YKVsbGSWIVbStMGnZ8Jr8611AtmvJW5FSLepO4p V9t3ASwasBe+7I5FRawzrEMWP4q2CUMJKcSKkg9cf0tHuUEnW+u6WWR+Q3kXRJJ9iJ1B qGjE1KtiPKJJa0huytkYhTVYnaP2Y3UlGB/ZUpg192JlcIJbtMiJMEEiLmUBJC1FxVaE nuL/COl8CYee5DAu+bRJTJsj01nkI5ULdSooa5UcXHPPved3qNeHMQS7bqc7N/NZ1lVb cDLDZdp9yrh+zfwciKky/X2RZdEfyE8y9JhZEA3NP8xlcaS+7vVtxpKFAcpVwuTJJFqv CI+g== X-Gm-Message-State: APjAAAXLUCNeL+HNee5MV5gqiVLUHRXRQwGpvIjiv8/YnSTZGCjRqRek 8+IAS2LrOPpuIJq18EEm8bsAO307y+B3/xcwQCZcsQ== X-Google-Smtp-Source: APXvYqyN0sYHlu1o4gL3bWquQGmFfQLa5Xr9Y8XhvaOt5prEHT3GdizU01G9HimblZEeJgcElHCo0MyfC8x58UgwyPU= X-Received: by 2002:a37:4ccf:: with SMTP id z198mr10619717qka.245.1567798071748; Fri, 06 Sep 2019 12:27:51 -0700 (PDT) MIME-Version: 1.0 References: <20190221.193325.152438307014996574.mbj@tail-f.com> In-Reply-To: From: Warren Kumari Date: Fri, 6 Sep 2019 15:27:15 -0400 Message-ID: To: Andy Bierman Cc: Martin Bjorklund , Peter Loborg , RFC Editor , Ignas Bagdonas , NetMod WG Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Archived-At: Subject: Re: [netmod] [Editorial Errata Reported] RFC7950 (5642) X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 06 Sep 2019 19:27:56 -0000 On Thu, Feb 21, 2019 at 1:53 PM Andy Bierman wrote: > > > > On Thu, Feb 21, 2019 at 10:33 AM Martin Bjorklund wrote: >> >> Andy Bierman wrote: >> > On Thu, Feb 21, 2019 at 10:07 AM Peter Loborg >> > wrote: >> > >> > > >> > > >> > > Your example is fine =E2=80=93 but the gammar is ch14 specifies some= thing >> > > different: >> > > >> > > >> > > >> > > enum-stmt =3D enum-keyword sep string optsep >> > > >> > > (";" / >> > > >> > > "{" stmtsep >> > > >> > > ;; these stmts can appear in any order >> > > >> > > *if-feature-stmt >> > > >> > > [value-stmt] >> > > >> > > [status-stmt] >> > > >> > > [description-stmt] >> > > >> > > [reference-stmt] >> > > >> > > "}") stmtsep >> > > >> > > >> > > >> > > It clearly states string, not quoted-string. These two have the fol= lowing >> > > rules: >> > > >> > > >> > > >> > > quoted-string =3D (DQUOTE string DQUOTE) / (SQUOTE string SQUO= TE) >> > > >> > > >> > > >> > > string =3D < an unquoted string, as returned by > >> > > >> > > < the scanner, that matches the rule > >> > > >> > > < yang-string > >> > > >> > > >> > > >> > >> > >> > The text in 9.6.4 is correct. >> > The ABNF is wrong. >> >> No, the ABNF is correct. The ABNF doens't handle concatenation etc. >> The idea is that the scanner handles quotes and concatenation and >> returns a "string". >> > > > OK -- it is confusing that the rule quoted-string exists, but it > is only for key and leaf-list predicates. Hi all, I'm trying to go through and do some cleanup of the dangling Errata. I'm *certainly* not an expert here, and so am relying on y'all. >From what I've been able to figure out, the consensus is that this Errata should be rejected, yes? W > > >> >> >> /martin >> > > Andy > >> >> >> >> > >> > >> > >> > > =E2=80=A6and in 6.1.3 we can read that: >> > > >> > > An unquoted string is any sequence of characters that does not >> > > >> > > contain any space, tab, carriage return, or line feed characters,= a >> > > >> > > single or double quote character, a semicolon (";"), braces ("{" = or >> > > >> > > "}"), or comment sequences ("//", "/*", or "*/"). >> > > >> > > >> > > >> > > Note that any keyword can legally appear as an unquoted string. >> > > >> > > >> > > >> > > Since the section so clearly writes about single quoted strings and = double >> > > quoted strings, there can unfortunately be no interpretation that wo= uld >> > > allow =E2=80=9Cidentifier=E2=80=9D to be called an unquoted string = =E2=80=93 even though it follows >> > > the rules about limited character contents. >> > > >> > > >> > > >> > > Hence =E2=80=93 this is not a matter of opinion =E2=80=93 it=E2=80= =99s a matter of reading what=E2=80=99s >> > > actually written in the RFC. >> > > >> > > >> > > >> > > But on the subject of opinion=E2=80=A6 >> > > >> > > >> > > >> > > enum "This is also legal"; // should definitely always be il= legal >> > > >> > > >> > > >> > > =E2=80=A6as we cannot create a language binding to enum constructs i= n any major >> > > programming languages. >> > > >> > > >> > > >> > >> > There are many aspects of YANG that do not map directly to programming >> > languages, >> > such as allowing '.' in identifiers. >> > >> > >> > >> > > Br, >> > > >> > > Peter >> > > >> > >> > >> > Andy >> > >> > >> > > >> > > >> > > >> > > >> > > *From:* Andy Bierman >> > > *Sent:* den 21 februari 2019 18:45 >> > > *To:* Martin Bjorklund >> > > *Cc:* RFC Editor ; Ignas Bagdonas < >> > > ibagdona@gmail.com>; NetMod WG ; Peter Loborg < >> > > peter.loborg@ericsson.com>; Warren Kumari >> > > *Subject:* Re: [netmod] [Editorial Errata Reported] RFC7950 (5642) >> > > >> > > >> > > >> > > >> > > >> > > >> > > >> > > On Thu, Feb 21, 2019 at 8:53 AM Martin Bjorklund wr= ote: >> > > >> > > RFC Errata System wrote: >> > > > The following errata report has been submitted for RFC7950, >> > > > "The YANG 1.1 Data Modeling Language". >> > > > >> > > > -------------------------------------- >> > > > You may review the report below and at: >> > > > http://www.rfc-editor.org/errata/eid5642 >> > > > >> > > > -------------------------------------- >> > > > Type: Editorial >> > > > Reported by: Peter Loborg >> > > > >> > > > Section: 9.6.4 >> > > > >> > > > Original Text >> > > > ------------- >> > > > It takes as an argument a string that is the assigned name. >> > > > >> > > > Corrected Text >> > > > -------------- >> > > > It takes as an argument an unquoted string that is the assigned na= me. >> > > >> > > This is not correct. The enum argument is not different from any >> > > other keyword's arguments in YANG. See e.g. the example in 9.12.4: >> > > >> > > type enumeration { >> > > enum "unbounded"; >> > > } >> > > >> > > The following is also legal: >> > > >> > > enum "unb" + 'ounded'; >> > > >> > > >> > > >> > > >> > > >> > > enum "This is also legal"; >> > > >> > > >> > > >> > > 9.6.4. The "enum" Statement >> > > >> > > >> > > >> > > The "enum" statement, which is a substatement to the "type" >> > > >> > > statement, MUST be present if the type is "enumeration". It is >> > > >> > > repeatedly used to specify each assigned name of an enumeration t= ype. >> > > >> > > It takes as an argument a string that is the assigned name. *The= * >> > > >> > > * string MUST NOT be zero-length and MUST NOT have any leading or* >> > > >> > > * trailing whitespace characters* (any Unicode character with the >> > > >> > > "White_Space" property). The use of Unicode control codes SHOULD= be >> > > >> > > avoided. >> > > >> > > >> > > >> > > >> > > >> > > This errata should be rejected. >> > > >> > > >> > > >> > > /martin >> > > >> > > >> > > >> > > >> > > >> > > Andy >> > > >> > > >> > > >> > > >> > > > >> > > > Notes >> > > > ----- >> > > > Readers are not beeing made aware that careful reading of section = 6.1.3 >> > > and the detailed definition of string in section 14 must be consulte= d. >> > > > For comming versions of this RFC it would be preferable to use a m= ore >> > > specialized grammar token for these cases (e.g. unquoted-string). >> > > > >> > > > Instructions: >> > > > ------------- >> > > > This erratum is currently posted as "Reported". If necessary, plea= se >> > > > use "Reply All" to discuss whether it should be verified or >> > > > rejected. When a decision is reached, the verifying party >> > > > can log in to change the status and edit the report, if necessary. >> > > > >> > > > -------------------------------------- >> > > > RFC7950 (draft-ietf-netmod-rfc6020bis-14) >> > > > -------------------------------------- >> > > > Title : The YANG 1.1 Data Modeling Language >> > > > Publication Date : August 2016 >> > > > Author(s) : M. Bjorklund, Ed. >> > > > Category : PROPOSED STANDARD >> > > > Source : Network Modeling >> > > > Area : Operations and Management >> > > > Stream : IETF >> > > > Verifying Party : IESG >> > > > >> > > >> > > _______________________________________________ >> > > netmod mailing list >> > > netmod@ietf.org >> > > https://www.ietf.org/mailman/listinfo/netmod >> > > >> > > --=20 I don't think the execution is relevant when it was obviously a bad idea in the first place. This is like putting rabid weasels in your pants, and later expressing regret at having chosen those particular rabid weasels and that pair of pants. ---maf From nobody Fri Sep 6 12:37:59 2019 Return-Path: X-Original-To: netmod@ietfa.amsl.com Delivered-To: netmod@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 7BABB120B27 for ; Fri, 6 Sep 2019 12:37:56 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -0.878 X-Spam-Level: X-Spam-Status: No, score=-0.878 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, MISSING_HEADERS=1.021, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=no autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=kumari-net.20150623.gappssmtp.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id YiOz4H7CQM_8 for ; Fri, 6 Sep 2019 12:37:54 -0700 (PDT) Received: from mail-qk1-x72c.google.com (mail-qk1-x72c.google.com [IPv6:2607:f8b0:4864:20::72c]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 3B6E1120B29 for ; Fri, 6 Sep 2019 12:37:53 -0700 (PDT) Received: by mail-qk1-x72c.google.com with SMTP id x134so6857215qkb.0 for ; Fri, 06 Sep 2019 12:37:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kumari-net.20150623.gappssmtp.com; s=20150623; h=mime-version:references:in-reply-to:from:date:message-id:subject:cc :content-transfer-encoding; bh=UCMY/uTxtEC+K+ETuCKkbOJ3fOSmSqjFU96AuZaf0tk=; b=bPnoqwuGLL36Bs8gd1377hKaquP0peaZAl6izF3Cw1I2EzfDFzh736PgPj5I288ono gBc6TeWH92wZayU2WnLl7YBV270T+M0TJUlL+WPcY8LIhmuY/Woqxfn68Ts63AR5jSpS DhgYSyKk82j990SH4ZJVzjf13jN0mGyFmEai1I8F9V6dMOC+xV+3/wUjgrijeDR50qbk b5qPdY4FPRg4FdU8Ok6UdCtLM9K44JVZjlBzD8hQeMerRxyurdI1hf2BXQtY4eDBxO2A mJdpMlzj8fzxHF7b7fo/S2REYqAGAhuYSW5BQG8FixTg86leanFqiAdcCSz8RCFtVvKo IPdA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:cc:content-transfer-encoding; bh=UCMY/uTxtEC+K+ETuCKkbOJ3fOSmSqjFU96AuZaf0tk=; b=XXVX67y3IY71RyMomiMQ6bRtHHkHD1z6TEtZScl7UtxynIQF9jF5wx0/JasazO5yKk bYAdRyrjLd/hC8Vr7GPfSINAxgRI2fssyXJkRaL+jXr0mmjtGi8r+YXd0nsah6EL2WQY TGBSNIbku4X++ezJaskfcAryNbIxUEEzktQRVbMFKBxX+3tlo/DyK+cYMQvQfmN4UrWN IzOdNwktDPmwrQN4+3lM0JBKc0ApsiFFsUVEXUGP5QsBMZXr3IpyU02a5a766lRHTiD+ k2djatnz8UXhOJfvE8tsbl4DRwirAGtL3Wm8hS1kVhRswI/kXOc0lI7O1W959qZTNole qVOA== X-Gm-Message-State: APjAAAUTL1t0N3mBgOJgli1EXMnvElmSEY8D5pZ+pJMvVjzSm3zP1S+Y MqlVB6TXilSREyJpkNQBXDyQgCPADDQmCXi2dBGEyw== X-Received: by 2002:a37:6d2:: with SMTP id 201mt10198901qkg.106.1567798672018; Fri, 06 Sep 2019 12:37:52 -0700 (PDT) MIME-Version: 1.0 References: <20190813112613.82CE8B80E16@rfc-editor.org> In-Reply-To: <20190813112613.82CE8B80E16@rfc-editor.org> From: Warren Kumari Date: Fri, 6 Sep 2019 15:37:15 -0400 Message-ID: Cc: =?UTF-8?Q?martin_bj=C3=B6rklund?= , Ignas Bagdonas , Joel Jaeggli , Kent Watsen , Lou Berger , jernej.tuljak@mg-soft.si, NetMod WG Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Archived-At: Subject: Re: [netmod] [Technical Errata Reported] RFC7950 (5807) X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 06 Sep 2019 19:37:56 -0000 [ - RFC Ed (for clutter), + Benoit (who verified https://www.rfc-editor.org/errata/eid4794) ] I'm trying to go through and clean up the outstanding Ops and Management Errata. I'm completely, 100% not a YANG / netmod person (I cannot even spell YANG!), but I *think* that this Errata should be verified, yes? This isn't changing what was decided when the WG published this, it is simply correcting / clarifying the text. The Errata criteria are here: https://www.ietf.org/about/groups/iesg/statements/processing-rfc-errata/ One of the big ones is that we only use Errata to fix actual errors, not change anything that was WG consensus at the time: "Changes that modify the working of a protocol to something that might be different from the intended consensus when the document was approved should be either Hold for Document Update or Rejected. Deciding between these two depends on judgment. Changes that are clearly modifications to the intended consensus, or involve large textual changes, should be Rejected. In unclear situations, small changes can be Hold for Document Update." Again, I'm not a NetMod person, so looking for clear advice here... W On Tue, Aug 13, 2019 at 7:26 AM RFC Errata System wrote: > > The following errata report has been submitted for RFC7950, > "The YANG 1.1 Data Modeling Language". > > -------------------------------------- > You may review the report below and at: > https://www.rfc-editor.org/errata/eid5807 > > -------------------------------------- > Type: Technical > Reported by: Jernej Tuljak > > Section: 7.21.5. > > Original Text > ------------- > o If the "when" statement is a child of a "uses", "choice", or > "case" statement, then the context node is the closest ancestor > node to the node with the "when" statement that is also a data > node. If no such node exists, the context node is the root node. > The accessible tree is tentatively altered during the processing > of the XPath expression by removing all instances (if any) of the > nodes added by the "uses", "choice", or "case" statement. > > Corrected Text > -------------- > o If the "when" statement is a child of a "uses", "choice", or > "case" statement, then the context node is the closest ancestor > node to the node with the "when" statement that is also a data > node, rpc, action or notification. If no such node exists, the > context node is the root node. The accessible tree is tentatively > altered during the processing of the XPath expression by removing > all instances (if any) of the nodes added by the "uses", > "choice", or "case" statement. > > Notes > ----- > Similar to verified errata 4794 (https://www.rfc-editor.org/errata/eid479= 4) but covers the "uses", "choice" and "case" corner case (instead of "augm= ent"). If the node for which the "when" statement is defined is within an r= pc, action or notification, the context node also needs to be inside that r= pc, action or notification. There are published IETF modules, which rely on= this to be true, such as "ietf-netconf-nmda@2019-01-07" in RFC8526 (https:= //tools.ietf.org/html/rfc8526) at schema node id "/ncds:get-data/ncds:input= /ncds:origin-filters". Original text assigns the context node to the root n= ode, if no data node ancestor is found. "rpc", "action" and "notification" = are not data nodes and are represented by nodes that are descendants of the= root node, as described in Section 6.4.1. > > Instructions: > ------------- > This erratum is currently posted as "Reported". If necessary, please > use "Reply All" to discuss whether it should be verified or > rejected. When a decision is reached, the verifying party > can log in to change the status and edit the report, if necessary. > > -------------------------------------- > RFC7950 (draft-ietf-netmod-rfc6020bis-14) > -------------------------------------- > Title : The YANG 1.1 Data Modeling Language > Publication Date : August 2016 > Author(s) : M. Bjorklund, Ed. > Category : PROPOSED STANDARD > Source : Network Modeling > Area : Operations and Management > Stream : IETF > Verifying Party : IESG --=20 I don't think the execution is relevant when it was obviously a bad idea in the first place. This is like putting rabid weasels in your pants, and later expressing regret at having chosen those particular rabid weasels and that pair of pants. ---maf From nobody Fri Sep 6 12:52:18 2019 Return-Path: X-Original-To: netmod@ietfa.amsl.com Delivered-To: netmod@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id D8A04120CA7 for ; Fri, 6 Sep 2019 12:52:16 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.899 X-Spam-Level: X-Spam-Status: No, score=-1.899 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=kumari-net.20150623.gappssmtp.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id dgsKN-ve1DYC for ; Fri, 6 Sep 2019 12:52:13 -0700 (PDT) Received: from mail-qt1-x844.google.com (mail-qt1-x844.google.com [IPv6:2607:f8b0:4864:20::844]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id AE507120C4C for ; Fri, 6 Sep 2019 12:52:07 -0700 (PDT) Received: by mail-qt1-x844.google.com with SMTP id u40so8479241qth.11 for ; Fri, 06 Sep 2019 12:52:07 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kumari-net.20150623.gappssmtp.com; s=20150623; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc:content-transfer-encoding; bh=hvf3i5IrM+gPSa/dahRuh9T8XyB50rs7ED+/w/hFqqs=; b=03pMP5iqKW3sBxuGhxALLAkxE17ggMn6y+eOZvX3HUlgZo2EPLKQQ8dW6vR4tlESyB 1CUOTdrdc/q3c2+qkTK5Vor2rEW03iByqiOZaCpwW8JEqDaJw8/Zcg2QclWlhTVhe14i yt7VUHbYYJZDucLiVOsk0SO7mUoZHFexCg5PVWtcU9PTjoIGdPsxFmurA8IocaTIibg7 OSGqKMa4iFshtRPc4E4aL6puwJYfQexrZfkZExyKkcDy3S511pn2F+AkWOIx2uJcgcaC 0K4i5ZOu75+NemHTA9tJx/5fGxBaop7d6aVZ2cvgvZ0kOq9bvf36mHDbnFEtVZ+Zvi63 EuVw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc:content-transfer-encoding; bh=hvf3i5IrM+gPSa/dahRuh9T8XyB50rs7ED+/w/hFqqs=; b=jbYjBVphgwCtuL6DHuIRyOtOjRhJf1E2/WXaPXA/GPZhDMFpn2nW1++KPU71I5QxS4 rHZ2kkKvwsD5uR8SBpyJc4SBAyEEmlhHmiVlPOZ5wSCO55tmCDddbtasNplWlFOuxy1m q1pghGsxd5vmvrQBA6xEZdD4flfroIHLku+8W5IKKlrjIBjuAh7tS2WvUtakmpmwqEvr b9DygBTDvB4IbMkgWS3manUIHXUJKl/Ehg/XuP7KjdAw02mE3YJsZCnjbroQOF6YT+zA VLBMwVju/Xw27lNAHQWOzE8ycIUpjA9WBgJw6FFT9o0R/dghEoEjyLDVb2K6kggfsoND 7VgQ== X-Gm-Message-State: APjAAAUytoQfcDLN0ZjLQ4CrN+XXvyUKCdp/F42IP5MF0UYQeDBlnq0b P8zkDsJeVll+zB0EOyKPMNkO74g+yZae0HXBUdVY1A== X-Google-Smtp-Source: APXvYqzJU8ynFtM6u17KXt3zQ0/7sQLou1Jb1q6aMTC8f1lzagE9R9ulpypnbwy8fy9FC1QvPZ/fzIGDnSqxg2j2K4s= X-Received: by 2002:ac8:47d3:: with SMTP id d19mr10919782qtr.77.1567799526111; Fri, 06 Sep 2019 12:52:06 -0700 (PDT) MIME-Version: 1.0 References: <20190717123439.fg2j56mzkj36yuh3@anna.jacobs.jacobs-university.de> <5c18f238-fdc7-98af-36ac-4f9784663bd7@hedeland.org> In-Reply-To: <5c18f238-fdc7-98af-36ac-4f9784663bd7@hedeland.org> From: Warren Kumari Date: Fri, 6 Sep 2019 15:51:29 -0400 Message-ID: To: Per Hedeland Cc: Qin Wu , "Rob Wilton (rwilton)" , "ibagdona@gmail.com" , "netmod@ietf.org" , RFC Errata System Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Archived-At: Subject: Re: [netmod] [Technical Errata Reported] RFC7950 (5784) X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 06 Sep 2019 19:52:17 -0000 On Wed, Jul 17, 2019 at 9:29 AM Per Hedeland wrote: > > On 2019-07-17 14:34, Juergen Schoenwaelder wrote: > > Its the first half of the sentence in my copy of RFC 7950. > > It believe that there is a problem with English language both in Qin's > understanding of the original text (which is correct also in my > opinion) and in his explanation of his (mis)understanding... > > > I propose to reject this errata. > > I agree, in particular since the suggested change is IMHO no actual > improvement. It seems the problem is in understanding the "subject to" > construct, which is perhaps not obvious to *all* non-native English > readers, but I can't think of a replacement that wouldn't result in an > unecessarily complex text. Hi all, #include // Not a YANG person. I spent some time trying to decide between Hold for Document Update, and Rejected. I've decided on Rejected, but if and when we decide to update this, it may be worth addressing the text anyway. W > > > /js > > > > On Wed, Jul 17, 2019 at 12:02:21PM +0000, Qin Wu wrote: > >> Hi, Juergen and Rob: > >> The condition to apply " Leading and trailing zeros are prohibited ",i= s the second half sentence, i.e.,"there MUST be at least one digit before a= nd after the decimal point". > > It seems that you have it almost backwards... "The rule is A subject > to the rule B" means that rule A should be applied, except when it > will violate rule B. > > >> One digit before the decimal point and one digit after the decimal poi= nt at the same time cover 0.5000000?, I still don't get it. > > It's a very good example. With unconditional application of "Leading > and trailing zeros are prohibited", we end up with .5 - but then we > violate "there MUST be at least one digit before and after the decimal > point", so we need to back out the removal of the leading zero, and > end up with 0.5. > > >> Maybe I am wrong, but this is not a big deal. > > Hopefully the above helps... > > --Per > > >> -Qin > >> -----=C2=AE=C3=B6=C5=B8=C3=B6----- > >> =C3=91=C3=B6=C2=BA: Juergen Schoenwaelder [mailto:j.schoenwaelder@jaco= bs-university.de] > >> =C3=91 =C3=B6=C3=B4: 2019t7 17=C3=A5 18:29 > >> 6=C3=B6=C2=BA: Qin Wu > >> =E2=80=9E : Rob Wilton (rwilton) ; ibagdona@gmail.c= om; warren@kumari.net; netmod@ietf.org; RFC Errata System > >> ;=CB=9C: Re: [netmod] RE: [Technical Errata Reported] RFC7950 (5784) > >> > >> The text starts with the general case and says "Leading and trailing z= eros are prohibited", which seems to cover 0.50000000 (which must be repres= ented as 0.5. > >> > >> /js > >> > >> On Wed, Jul 17, 2019 at 09:42:38AM +0000, Qin Wu wrote: > >>> I realized my proposed changes also have some flaw and may need to be= tweaked. > >>> > >>> My question is should trailing zeros in 0.50000 be allowed? I didn = t see the original text prohibit this. > >>> Yes, the original text is correct, but it excludes some exception cas= es, such as 0.500000000 , if my understanding is correct. > >>> =C3=91=C3=B6=C2=BA: Rob Wilton (rwilton) [mailto:rwilton@cisco.com] > >>> =C3=91 =C3=B6=C3=B4: 2019t7 17=C3=A5 17:20 > >>> 6=C3=B6=C2=BA: Qin Wu ; Juergen Schoenwaelder > >>> > >>> =E2=80=9E : ibagdona@gmail.com; warren@kumari.net; netmod@ietf.org; R= FC Errata > >>> System > >>> ;=CB=9C: RE: [netmod] T > : [Technical Errata Reported] RFC7950 (5784) > >>> > >>> Hi Qin, > >>> > >>> I also find the current RFC text quite understandable and correct. > >>> > >>> The and is required to disallow .0 and 0. as valid canonical fo= rms. I.e. in the canonical form there MUST always be at least one digit (w= hich could be 0) before the decimal point and then must be at least one dig= it (which could be 0) after the decimal point. Otherwise, there must be no= leading or trailing 0 s. So, none of .0 , 0. , 00.0 , 0.00 and 00.= 00 are in the canonical form, and should be represented as 0.0 instead; = similarly none of .1 , 1. , 01.0 , 1.00 and 01.00 are in the canonic= al form and should be represented as 1.0 instead. > >>> > >>> Thanks, > >>> Rob > >>> > >>> > >>> From: netmod = > > >>> On Behalf Of Qin Wu > >>> Sent: 17 July 2019 09:59 > >>> To: Juergen Schoenwaelder > >>> >>> iversity.de>> > >>> Cc: ibagdona@gmail.com; > >>> warren@kumari.net; > >>> netmod@ietf.org; RFC Errata System > >>> > > >>> Subject: [netmod] T > : [Technical Errata Reported] RFC7950 (5784) > >>> > >>> > >>> Understand, the problem lies at "and" that is used in " one digit bef= ore and after the decimal point ", that is to say it only focus on the case= that has two digits, one is before decimal point, the other digit is after= decimal such as "5.06", but doesn't cover the case where "one digit before= or after the decimal point ", that s why I think the case 0.500000 is not = covered. We should prohibit trailing zeros in 0.5000000 . > >>> > >>> -----=C2=AE=C3=B6=C5=B8=C3=B6----- > >>> =C3=91=C3=B6=C2=BA: Juergen Schoenwaelder > >>> [mailto:j.schoenwaelder@jacobs-university.de] > >>> =C3=91 =C3=B6=C3=B4: 2019t7 17=C3=A5 16:46 > >>> 6=C3=B6=C2=BA: Qin Wu > > >>> =E2=80=9E : RFC Errata System > >>> >; > >>> ibagdona@gmail.com; > >>> netmod@ietf.org; > >>> warren@kumari.net > >>> ;=CB=9C: Re: [netmod] [Technical Errata Reported] RFC7950 (5784) > >>> > >>> > >>> > >>> The text starts with the general case and says "Leading and trailing = zeros are prohibited", which seems to cover 0.50000000. The text then handl= es the special rule that there needs to be at least one digit before and af= ter the decimal point. I think all is fine. > >>> > >>> > >>> > >>> /js > >>> > >>> > >>> > >>> On Wed, Jul 17, 2019 at 08:11:41AM +0000, Qin Wu wrote: > >>> > >>>> What about "0.50000000"? based on original text, is it legal or ille= gal? > >>> > >>>> It seem original text exclude the case where one digit before or aft= er the decimal point? > >>> > >>>> > >>> > >>>> -Qin > >>> > >>>> -----=C2=AE=C3=B6=C5=B8=C3=B6----- > >>> > >>>> =C3=91=C3=B6=C2=BA: netmod [mailto:netmod-bounces@ietf.org] =C3=A3h = Juergen > >>>> Schoenwaelder > >>> > >>>> =C3=91 =C3=B6=C3=B4: 2019t7 17=C3=A5 15:50 > >>> > >>>> 6=C3=B6=C2=BA: RFC Errata System > >>>> > > >>> > >>>> =E2=80=9E : ibagdona@gmail.com; > >>>> netmod@ietf.org; > >>>> warren@kumari.net > >>> > >>>> ;=CB=9C: Re: [netmod] [Technical Errata Reported] RFC7950 (5784) > >>> > >>>> > >>> > >>>> I do not see why the original text makes 0.5 or 0.0 illegal. > >>> > >>>> > >>> > >>>> /js > >>> > >>>> > >>> > >>>> On Tue, Jul 16, 2019 at 08:52:52PM -0700, RFC Errata System wrote: > >>> > >>>>> The following errata report has been submitted for RFC7950, "The > >>> > >>>>> YANG > >>> > >>>>> 1.1 Data Modeling Language". > >>> > >>>>> > >>> > >>>>> -------------------------------------- > >>> > >>>>> You may review the report below and at: > >>> > >>>>> https://www.rfc-editor.org/errata/eid5784 > >>> > >>>>> > >>> > >>>>> -------------------------------------- > >>> > >>>>> Type: Technical > >>> > >>>>> Reported by: Qin WU > >>>>> > > >>> > >>>>> > >>> > >>>>> Section: 9.3.2 > >>> > >>>>> > >>> > >>>>> Original Text > >>> > >>>>> ------------- > >>> > >>>>> Leading and trailing zeros are prohibited, subject to the rule > >>>>> that > >>> > >>>>> there MUST be at least one digit before and after the decimal point= . > >>> > >>>>> The value zero is represented as "0.0". > >>> > >>>>> > >>> > >>>>> > >>> > >>>>> > >>> > >>>>> > >>> > >>>>> Corrected Text > >>> > >>>>> -------------- > >>> > >>>>> Leading zeros before the first digit and trailing zeros after the > >>> > >>>>> last digit are prohibited, subject to the rule that there MUST be > >>>>> at > >>> > >>>>> least one digit before and after the decimal point. The value > >>>>> zero > >>> > >>>>> is represented as "0.0". > >>> > >>>>> > >>> > >>>>> Notes > >>> > >>>>> ----- > >>> > >>>>> Based on the rule in the orginal text, the value such as "0.5","0.0= " is illegal. So I think the intention of the original text is to make sure= the leading zeros before the first digit and the trailing zero after the l= ast digit are prohibited. > >>> > >>>>> > >>> > >>>>> Instructions: > >>> > >>>>> ------------- > >>> > >>>>> This erratum is currently posted as "Reported". If necessary, > >>>>> please > >>> > >>>>> use "Reply All" to discuss whether it should be verified or rejecte= d. > >>> > >>>>> When a decision is reached, the verifying party can log in to > >>>>> change > >>> > >>>>> the status and edit the report, if necessary. > >>> > >>>>> > >>> > >>>>> -------------------------------------- > >>> > >>>>> RFC7950 (draft-ietf-netmod-rfc6020bis-14) > >>> > >>>>> -------------------------------------- > >>> > >>>>> Title : The YANG 1.1 Data Modeling Language > >>> > >>>>> Publication Date : August 2016 > >>> > >>>>> Author(s) : M. Bjorklund, Ed. > >>> > >>>>> Category : PROPOSED STANDARD > >>> > >>>>> Source : Network Modeling > >>> > >>>>> Area : Operations and Management > >>> > >>>>> Stream : IETF > >>> > >>>>> Verifying Party : IESG > >>> > >>>>> > >>> > >>>>> _______________________________________________ > >>> > >>>>> netmod mailing list > >>> > >>>>> netmod@ietf.org > >>> > >>>>> https://www.ietf.org/mailman/listinfo/netmod > >>> > >>>> > >>> > >>>> -- > >>> > >>>> Juergen Schoenwaelder Jacobs University Bremen gGmbH > >>> > >>>> Phone: +49 421 200 3587 Campus Ring 1 | 28759 Bremen | Germa= ny > >>> > >>>> Fax: +49 421 200 3103 > >>> > >>>> > >>> > >>>> _______________________________________________ > >>> > >>>> netmod mailing list > >>> > >>>> netmod@ietf.org > >>> > >>>> https://www.ietf.org/mailman/listinfo/netmod > >>> > >>> > >>> > >>> -- > >>> > >>> Juergen Schoenwaelder Jacobs University Bremen gGmbH > >>> > >>> Phone: +49 421 200 3587 Campus Ring 1 | 28759 Bremen | German= y > >>> > >>> Fax: +49 421 200 3103 > >> > >> -- > >> Juergen Schoenwaelder Jacobs University Bremen gGmbH > >> Phone: +49 421 200 3587 Campus Ring 1 | 28759 Bremen | Germany > >> Fax: +49 421 200 3103 > > > -- I don't think the execution is relevant when it was obviously a bad idea in the first place. This is like putting rabid weasels in your pants, and later expressing regret at having chosen those particular rabid weasels and that pair of pants. ---maf From nobody Fri Sep 6 12:54:50 2019 Return-Path: X-Original-To: netmod@ietfa.amsl.com Delivered-To: netmod@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id C4CE6120D8D; Fri, 6 Sep 2019 12:54:48 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -4.2 X-Spam-Level: X-Spam-Status: No, score=-4.2 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id sV7T6v3VJWov; Fri, 6 Sep 2019 12:54:47 -0700 (PDT) Received: from rfc-editor.org (rfc-editor.org [4.31.198.49]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 58D2F120D89; Fri, 6 Sep 2019 12:54:47 -0700 (PDT) Received: by rfc-editor.org (Postfix, from userid 30) id 3F83CB80E93; Fri, 6 Sep 2019 12:54:24 -0700 (PDT) To: bill.wu@huawei.com, mbj@tail-f.com X-PHP-Originating-Script: 30:errata_mail_lib.php From: RFC Errata System Cc: warren@kumari.net, iesg@ietf.org, netmod@ietf.org, rfc-editor@rfc-editor.org Content-Type: text/plain; charset=UTF-8 Message-Id: <20190906195424.3F83CB80E93@rfc-editor.org> Date: Fri, 6 Sep 2019 12:54:24 -0700 (PDT) Archived-At: Subject: [netmod] [Errata Rejected] RFC7950 (5784) X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 06 Sep 2019 19:54:49 -0000 The following errata report has been rejected for RFC7950, "The YANG 1.1 Data Modeling Language". -------------------------------------- You may review the report below and at: https://www.rfc-editor.org/errata/eid5784 -------------------------------------- Status: Rejected Type: Technical Reported by: Qin WU Date Reported: 2019-07-17 Rejected by: Warren Kumari (Ops AD) (IESG) Section: 9.3.2 Original Text ------------- Leading and trailing zeros are prohibited, subject to the rule that there MUST be at least one digit before and after the decimal point. The value zero is represented as "0.0". Corrected Text -------------- Leading zeros before the first digit and trailing zeros after the last digit are prohibited, subject to the rule that there MUST be at least one digit before and after the decimal point. The value zero is represented as "0.0". Notes ----- Based on the rule in the orginal text, the value such as "0.5","0.0" is illegal. So I think the intention of the original text is to make sure the leading zeros before the first digit and the trailing zero after the last digit are prohibited. --VERIFIER NOTES-- The consensus on the NetMod WG was that this text was somewhat confusing, but understandable (and that crafting clear, concise replacement text will be ugly). I'm rejecting this, but future updates may want to consider addressing this anyway (I didn't feel it rose to the HFDU level) -------------------------------------- RFC7950 (draft-ietf-netmod-rfc6020bis-14) -------------------------------------- Title : The YANG 1.1 Data Modeling Language Publication Date : August 2016 Author(s) : M. Bjorklund, Ed. Category : PROPOSED STANDARD Source : Network Modeling Area : Operations and Management Stream : IETF Verifying Party : IESG From nobody Mon Sep 9 00:38:10 2019 Return-Path: X-Original-To: netmod@ietfa.amsl.com Delivered-To: netmod@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 6514D1200B2 for ; Mon, 9 Sep 2019 00:38:09 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.899 X-Spam-Level: X-Spam-Status: No, score=-1.899 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id dWK2Skdatnff for ; Mon, 9 Sep 2019 00:38:06 -0700 (PDT) Received: from mail.tail-f.com (mail.tail-f.com [46.21.102.45]) by ietfa.amsl.com (Postfix) with ESMTP id 927B51200C5 for ; Mon, 9 Sep 2019 00:38:06 -0700 (PDT) Received: from localhost (unknown [173.38.220.41]) by mail.tail-f.com (Postfix) with ESMTPSA id 45C2A1AE0118; Mon, 9 Sep 2019 09:38:05 +0200 (CEST) Date: Mon, 09 Sep 2019 09:37:41 +0200 (CEST) Message-Id: <20190909.093741.128094169571185151.mbj@tail-f.com> To: warren@kumari.net Cc: andy@yumaworks.com, peter.loborg@ericsson.com, rfc-editor@rfc-editor.org, ibagdona@gmail.com, netmod@ietf.org From: Martin Bjorklund In-Reply-To: References: <20190221.193325.152438307014996574.mbj@tail-f.com> X-Mailer: Mew version 6.7 on Emacs 25.2 / Mule 6.0 (HANACHIRUSATO) Mime-Version: 1.0 Content-Type: Text/Plain; charset=utf-8 Content-Transfer-Encoding: base64 Archived-At: Subject: Re: [netmod] [Editorial Errata Reported] RFC7950 (5642) X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 09 Sep 2019 07:38:09 -0000 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Return-Path: X-Original-To: netmod@ietfa.amsl.com Delivered-To: netmod@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id E506D1200CD for ; Mon, 9 Sep 2019 00:38:28 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.899 X-Spam-Level: X-Spam-Status: No, score=-1.899 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id N7ewaCfEhwxV for ; Mon, 9 Sep 2019 00:38:26 -0700 (PDT) Received: from mail.tail-f.com (mail.tail-f.com [46.21.102.45]) by ietfa.amsl.com (Postfix) with ESMTP id 551A3120121 for ; Mon, 9 Sep 2019 00:38:26 -0700 (PDT) Received: from localhost (unknown [173.38.220.41]) by mail.tail-f.com (Postfix) with ESMTPSA id 436651AE0118; Mon, 9 Sep 2019 09:38:25 +0200 (CEST) Date: Mon, 09 Sep 2019 09:38:01 +0200 (CEST) Message-Id: <20190909.093801.653761409423593292.mbj@tail-f.com> To: warren@kumari.net Cc: ibagdona@gmail.com, joelja@bogus.com, kent+ietf@watsen.net, lberger@labn.net, jernej.tuljak@mg-soft.si, netmod@ietf.org From: Martin Bjorklund In-Reply-To: References: <20190813112613.82CE8B80E16@rfc-editor.org> X-Mailer: Mew version 6.7 on Emacs 25.2 / Mule 6.0 (HANACHIRUSATO) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Archived-At: Subject: Re: [netmod] [Technical Errata Reported] RFC7950 (5807) X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 09 Sep 2019 07:38:29 -0000 Warren Kumari wrote: > [ - RFC Ed (for clutter), + Benoit (who verified > https://www.rfc-editor.org/errata/eid4794) ] > > I'm trying to go through and clean up the outstanding Ops and > Management Errata. I'm completely, 100% not a YANG / netmod person (I > cannot even spell YANG!), but I *think* that this Errata should be > verified, yes? This isn't changing what was decided when the WG > published this, it is simply correcting / clarifying the text. Yes I agree it should be verified. /martin > > The Errata criteria are here: > https://www.ietf.org/about/groups/iesg/statements/processing-rfc-errata/ > > One of the big ones is that we only use Errata to fix actual errors, > not change anything that was WG consensus at the time: > "Changes that modify the working of a protocol to something that might > be different from the intended consensus when the document was > approved should be either Hold for Document Update or Rejected. > Deciding between these two depends on judgment. Changes that are > clearly modifications to the intended consensus, or involve large > textual changes, should be Rejected. In unclear situations, small > changes can be Hold for Document Update." > > Again, I'm not a NetMod person, so looking for clear advice here... > > W > > On Tue, Aug 13, 2019 at 7:26 AM RFC Errata System > wrote: > > > > The following errata report has been submitted for RFC7950, > > "The YANG 1.1 Data Modeling Language". > > > > -------------------------------------- > > You may review the report below and at: > > https://www.rfc-editor.org/errata/eid5807 > > > > -------------------------------------- > > Type: Technical > > Reported by: Jernej Tuljak > > > > Section: 7.21.5. > > > > Original Text > > ------------- > > o If the "when" statement is a child of a "uses", "choice", or > > "case" statement, then the context node is the closest ancestor > > node to the node with the "when" statement that is also a data > > node. If no such node exists, the context node is the root node. > > The accessible tree is tentatively altered during the processing > > of the XPath expression by removing all instances (if any) of the > > nodes added by the "uses", "choice", or "case" statement. > > > > Corrected Text > > -------------- > > o If the "when" statement is a child of a "uses", "choice", or > > "case" statement, then the context node is the closest ancestor > > node to the node with the "when" statement that is also a data > > node, rpc, action or notification. If no such node exists, the > > context node is the root node. The accessible tree is tentatively > > altered during the processing of the XPath expression by removing > > all instances (if any) of the nodes added by the "uses", > > "choice", or "case" statement. > > > > Notes > > ----- > > Similar to verified errata 4794 (https://www.rfc-editor.org/errata/eid4794) but covers the "uses", "choice" and "case" corner case (instead of "augment"). If the node for which the "when" statement is defined is within an rpc, action or notification, the context node also needs to be inside that rpc, action or notification. There are published IETF modules, which rely on this to be true, such as "ietf-netconf-nmda@2019-01-07" in RFC8526 (https://tools.ietf.org/html/rfc8526) at schema node id "/ncds:get-data/ncds:input/ncds:origin-filters". Original text assigns the context node to the root node, if no data node ancestor is found. "rpc", "action" and "notification" are not data nodes and are represented by nodes that are descendants of the root node, as described in Section 6.4.1. > > > > Instructions: > > ------------- > > This erratum is currently posted as "Reported". If necessary, please > > use "Reply All" to discuss whether it should be verified or > > rejected. When a decision is reached, the verifying party > > can log in to change the status and edit the report, if necessary. > > > > -------------------------------------- > > RFC7950 (draft-ietf-netmod-rfc6020bis-14) > > -------------------------------------- > > Title : The YANG 1.1 Data Modeling Language > > Publication Date : August 2016 > > Author(s) : M. Bjorklund, Ed. > > Category : PROPOSED STANDARD > > Source : Network Modeling > > Area : Operations and Management > > Stream : IETF > > Verifying Party : IESG > > > > -- > I don't think the execution is relevant when it was obviously a bad > idea in the first place. > This is like putting rabid weasels in your pants, and later expressing > regret at having chosen those particular rabid weasels and that pair > of pants. > ---maf > From nobody Mon Sep 9 05:28:50 2019 Return-Path: X-Original-To: netmod@ietfa.amsl.com Delivered-To: netmod@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 3D37412008D for ; Mon, 9 Sep 2019 05:28:47 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -3.631 X-Spam-Level: X-Spam-Status: No, score=-3.631 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, INVALID_MSGID=0.568, RCVD_IN_DNSWL_MED=-2.3, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id G-b5zGT4fL96 for ; Mon, 9 Sep 2019 05:28:44 -0700 (PDT) Received: from huawei.com (lhrrgout.huawei.com [185.176.76.210]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 782A6120047 for ; Mon, 9 Sep 2019 05:28:44 -0700 (PDT) Received: from LHREML712-CAH.china.huawei.com (unknown [172.18.7.106]) by Forcepoint Email with ESMTP id EEA648EFF129CC8B5057 for ; Mon, 9 Sep 2019 13:28:41 +0100 (IST) Received: from lhreml703-chm.china.huawei.com (10.201.108.52) by LHREML712-CAH.china.huawei.com (10.201.108.35) with Microsoft SMTP Server (TLS) id 14.3.408.0; Mon, 9 Sep 2019 13:28:41 +0100 Received: from lhreml703-chm.china.huawei.com (10.201.108.52) by lhreml703-chm.china.huawei.com (10.201.108.52) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1713.5; Mon, 9 Sep 2019 13:28:41 +0100 Received: from DGGEMM422-HUB.china.huawei.com (10.1.198.39) by lhreml703-chm.china.huawei.com (10.201.108.52) with Microsoft SMTP Server (version=TLS1_0, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA_P256) id 15.1.1713.5 via Frontend Transport; Mon, 9 Sep 2019 13:28:41 +0100 Received: from DGGEMM513-MBX.china.huawei.com ([169.254.1.120]) by dggemm422-hub.china.huawei.com ([10.1.198.39]) with mapi id 14.03.0439.000; Mon, 9 Sep 2019 20:28:37 +0800 From: "Fengchong (frank)" To: netmod Thread-Topic: =?utf-8?B?W25ldG1vZF0gUGxlYXNlIGNsYXJpZnkgaW1wbGVtZW50YXRpb24gYWJvdXQg?= =?utf-8?B?4oCYd2hlbuKAmQ==?= Thread-Index: AdVkgxkxStdW26xJTo+kz8dBb3TuVgChwG4M Date: Mon, 9 Sep 2019 12:28:37 +0000 Message-ID: 8ED84560-C18B-42ED-9AD3-5D297C40819E References: <5756FB984666AD4BB8E1D63E2E3AA3D001F20F2C@dggemm513-mbs.china.huawei.com> In-Reply-To: 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Lj04t7FVir2pW6Alcbitvx/EqSGe8Fv54Q1Wqtq0OEoIIj1MGzxgpobRaHWOfOBiZ4VxDEHyXOS8b+8Q+qQfiDWERib1EX8s9rezeyRFLtfgbtEa1P6AHrNrJBwP09h9+jLAL0X3kdmpn9K4c4tdmCjovYMerFNFcyQ7yRcs3cKympJLX4QgOaIjAjVzztb6COijowNilzEEa/qMshaQeixIr6fHeyRicoPWfxRGYUO7C7WLV7ElZCTUzmB+HyfnBe/Z9GLDenCHcvVMx/9SN3fnOHmO7APvqf4yMToVRazbLTW9EhtEDtCB8EaGqyMGmhaUzcTlJiGB9mAUGHnzeD7rzdofjISvhCCaI4pYRgcWo7O7rXogR1uB9P4I3g10km51xW/CU3C9Nf7OwXX0D4L9HFwylsD7zKjIasaV9iw= x-ms-exchange-transport-forked: True Content-Type: multipart/alternative; boundary="_000_MN2PR11MB4366224F81AD9884FA130B37B5B70MN2PR11MB4366namp_" MIME-Version: 1.0 X-MS-Exchange-CrossTenant-Network-Message-Id: 3a76ee3d-bcf7-4a58-b971-08d7352b57da X-MS-Exchange-CrossTenant-originalarrivaltime: 09 Sep 2019 13:40:56.8133 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 5ae1af62-9505-4097-a69a-c1553ef7840e X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: /eEUMjUuH+Bdhh/ER4qdv0BMteJxK/w1/Q6TbykPEa6XKi1A8QSyEVu6tVFWR8xydkNFhpXxg8ZYJ4jxtHO+TQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: MN2PR11MB4494 X-OriginatorOrg: cisco.com X-Outbound-SMTP-Client: 173.37.102.21, xch-rcd-011.cisco.com X-Outbound-Node: alln-core-8.cisco.com Archived-At: Subject: Re: [netmod] =?iso-2022-jp?b?UGxlYXNlIGNsYXJpZnkgaW1wbGVtZW50YXRp?= =?iso-2022-jp?b?b24gYWJvdXQgGyRCIUYbKEJ3aGVuGyRCIUcbKEI=?= X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 09 Sep 2019 13:41:13 -0000 --_000_MN2PR11MB4366224F81AD9884FA130B37B5B70MN2PR11MB4366namp_ Content-Type: text/plain; charset="iso-2022-jp" Content-Transfer-Encoding: quoted-printable Hi Frank, My interpretation of what the expected behaviour is as follows. For =1B$B!H=1B(Bscene 1=1B$B!I=1B(B, the config change is accepted because = the result of the config datastore after the edit-config has been applied i= s valid. For =1B$B!H=1B(Bscene 2=1B$B!I=1B(B, the config change is rejected because = the result of the config datastore after the edit-config has been applied i= s invalid. My interpretation is that the block of text in 8.3.1 payload parsing is pri= mary intended to refer to RFC input. E.g. if the RPC was defined something= like below, then the =1B$B!F=1B(Bwhen=1B$B!G=1B(B rule in 8.3.1 would enfo= rce that a zip-code can only be provided if the country is the USA. rpc rock-the-house { input { leaf country { type string; } leaf zip-code { when =1B$B!H=1B(B../country =3D =1B$B!F=1B(Busa=1B$B!G!I=1B(B; type string; } } } Thanks, Rob From: netmod On Behalf Of Fengchong (frank) Sent: 06 September 2019 08:19 To: netmod@ietf.org Cc: Yangang Subject: [netmod] Please clarify implementation about =1B$B!F=1B(Bwhen=1B$B= !G=1B(B Hi all, In RFC7950 secton 8, several description about when=1B$B!'=1B(B In section 8.2. Configura= tion Data Modifications o If a request modifies a configuration data node such that any node's "when" expression becomes false, then the node in the data tree with the "when" expression is deleted by the server. In 8.3.1. Payload Parsi= ng o If data for a node tagged with "when" is present and the "when" condition evaluates to "false", the server MUST reply with an "unknown-element" in the . In 8.3.2. NETCONF Processing Modification requests for nodes tagged with "when", and the "when" condition evaluates to "false". In this case, the server MUST reply with an "unknown-element" in the . YANG module=1B$B!'=1B(B module foo { namespace =1B$B!H=1B(Bhttp://foo.com=1B$B!I=1B(B; prefix =1B$B!H=1B(Bfoo=1B$B!I=1B(B; Leaf a {=1B$B!D=1B(B} Leaf b { When =1B$B!H=1B(Ba =3D 10=1B$B!I=1B(B; } } Scene 1: The first edit-config request: 3 This request will set a =3D 3. The second request: 10 5 According 8.3.1, in rpc payload parsing phase, the a=1B$B!G=1B(Bs value in = candidate datastore is 3,so leaf b=1B$B!G=1B(Bs when condition is evaluated= to false, server will report =1B$B!F=1B(Bunknown-element=1B$B!G=1B(B error= . Is it expected by user? Scene 2: The first edit-config request: 10 This request will set a =3D 10. The second request: 3 5 According 8.3.1, in rpc payload parsing phase, the a=1B$B!G=1B(Bs value in = candidate datastore is 10, so leaf b=1B$B!G=1B(Bs when condition is evaluat= ed to true, server will accept this request in payload parsing phase. In edit-config request processing phase, if leaf a=1B$B!G=1B(Bs modificatio= n is processed firstly, the a=1B$B!G=1B(Bs value will be changed to 3, so t= he b=1B$B!G=1B(Bs when condition will be false, when server process b=1B$B!= G=1B(Bs modification, b will be treated as unknown-element, the edit-config= request will fail. If leaf b=1B$B!G=1B(Bs modification is processed firstly, server will accep= t this modification ,because b=1B$B!G=1B(Bs when condition is true, and whe= n server process a=1B$B!G=1B(Bs modification , this modification will be ac= cepted, and b=1B$B!G=1B(Bs when condition will be evaluated to false, leaf = b will be deleted automatically, the edit-config request will be OK. How server should process this situation? --_000_MN2PR11MB4366224F81AD9884FA130B37B5B70MN2PR11MB4366namp_ Content-Type: text/html; charset="iso-2022-jp" Content-Transfer-Encoding: quoted-printable

Hi Frank,

 

My interpretation of what the expected behaviour is as follows.

 

For =1B$B!H=1B(Bscene 1=1B$B!I=1B(B, the config change is accepted = because the result of the config datastore after the edit-config has been a= pplied is valid.

 

For =1B$B!H=1B(Bscene 2=1B$B!I=1B(B, the config change is rejected = because the result of the config datastore after the edit-config has been a= pplied is invalid.

 

My interpretation is that the block of text in 8.3.1 payload parsin= g is primary intended to refer to RFC input.  E.g. if the RPC was defi= ned something like below, then the =1B$B!F=1B(Bwhen=1B$B!G=1B(B rule in 8.3.1 would enforce that a zip-code can only be provided if the co= untry is the USA.

 

       rpc rock-the-hou= se {

         inpu= t {

         &nbs= p; leaf country {

         = ;    type string;

         = ;  }

         = ;  leaf zip-code {

         = ;    when =1B$B!H=1B(B../country =3D =1B$B!F=1B(Busa=1B$B!G!= I=1B(B;

         = ;    type string;

         = ;  }

         }

       }

 

Thanks,

Rob

 

 

 

From: netmod <netmod-bounces@ietf.org> On Behalf Of Fengchong (frank)
Sent: 06 September 2019 08:19
To: netmod@ietf.org
Cc: Yangang <yangang@huawei.com>
Subject: [netmod] Please clarify implementation about =1B$B!F=1B(Bwh= en=1B$B!G=1B(B

 =

Hi all,

 

In RFC7950 secton 8, several de= scription about when=1B$B!'=1B(B

In section 8.2.  Configuration Data Modifications

 =   o  If a request modifies a configuration data node such that an= y

 =      node's "when" expression becomes false, = then the node in the data

 =      tree with the "when" expression is delet= ed by the server.

In 8.3.1.  Payload Parsing

 &nbs=
p; o  If data for a node tagged with "when" is present and t=
he "when"
 &nbs=
p;    condition evaluates to "false", the server M=
UST reply with an
 &nbs=
p;    "unknown-element" <error-tag> in the &=
lt;rpc-error>.

In 8.3.2.  NETCONF <edit-config> Processing

Modificati=
on requests for nodes tagged with "when", and the "when"=
;
 &nbs=
p;    condition evaluates to "false".  In thi=
s case, the server MUST
 &nbs=
p;    reply with an "unknown-element" <error-ta=
g> in the <rpc-error>.

 

YANG module=1B$B!'=1B(B

module foo {<= /p>

   namespace =1B$B!H= =1B(Bhttp://foo.com=1B$B!I=1B(B;<= /span>

   prefix =1B$B!H=1B(= Bfoo=1B$B!I=1B(B;

L= eaf a {=1B$B!D=1B(B}

L= eaf b {

&= nbsp; When =1B$B!H=1B(Ba =3D 10=1B$B!I=1B(B;

}=

}

Scene 1:

The first edit-config request:<= o:p>

<edit-config><= /span>

   <target>

      = <candidate/>

   </target>

   <config>= ;

      = <a xmlns=3D =1B$B!H=1B(Bhttp://foo.com=1B= $B!I=1B(B>3</a>

   </config>

</edit-config>=

This request will set a =3D 3.<= o:p>

 

The second request:<= /span>

<edit-config><= /span>

   <target>

      = <candidate/>

   </target>

   <config>= ;

      = <a xmlns=3D =1B$B!H=1B(Bhttp://foo.com=1B= $B!I=1B(B>10</a>

      = <b xmlns=3D =1B$B!H=1B(Bhttp://foo.com=1B= $B!I=1B(B>5</b>

   </config>

</edit-config>=

 

Acco= rding 8.3.1, in rpc payload parsing phase, the a=1B$B!G=1B(Bs value in cand= idate datastore is 3,so leaf b=1B$B!G=1B(Bs when condition is evaluated to = false, server will report =1B$B!F=1B(Bunknown-element=1B$B!G=1B(B error.

Is i= t expected by user?

Scene 2:

The first edit-config request:<= o:p>

<edit-config><= /span>

   <target>

      = <candidate/>

   </target>

   <config>= ;

      = <a xmlns=3D =1B$B!H=1B(Bhttp://foo.com=1B= $B!I=1B(B>10</a>

   </config>

</edit-config>=

This request will set a =3D 10.=

 

The second request:<= /span>

<edit-config><= /span>

   <target>

      = <candidate/>

   </target>

   <config>= ;

      = <a xmlns=3D =1B$B!H=1B(Bhttp://foo.com=1B= $B!I=1B(B>3</a>

      = <b xmlns=3D =1B$B!H=1B(Bhttp://foo.com=1B= $B!I=1B(B>5</b>

   </config>

</edit-config>=

Acco= rding 8.3.1, in rpc payload parsing phase, the a=1B$B!G=1B(Bs value in cand= idate datastore is 10, so leaf b=1B$B!G=1B(Bs when condition is evaluated t= o true, server will accept this request in payload parsing phase.

 

In e= dit-config request processing phase, if leaf a=1B$B!G=1B(Bs modification is= processed firstly, the a=1B$B!G=1B(Bs value will be changed to 3, so the b= =1B$B!G=1B(Bs when condition will be false, when server process b=1B$B!G=1B= (Bs modification, b will be treated as unknown-element, the edit-config request will fail. <= o:p>

If l= eaf b=1B$B!G=1B(Bs modification is processed firstly, server will accept th= is modification ,because b=1B$B!G=1B(Bs when condition is true, and when se= rver process a=1B$B!G=1B(Bs modification , this modification will be accept= ed, and b=1B$B!G=1B(Bs when condition will be evaluated to false, leaf b will = be deleted automatically, the edit-config request will be OK.

 

How = server should process this situation?

 

--_000_MN2PR11MB4366224F81AD9884FA130B37B5B70MN2PR11MB4366namp_-- From nobody Mon Sep 9 10:14:02 2019 Return-Path: X-Original-To: netmod@ietfa.amsl.com Delivered-To: netmod@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 0EA8E1201EA for ; Mon, 9 Sep 2019 10:14:01 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.898 X-Spam-Level: X-Spam-Status: No, score=-1.898 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=yumaworks-com.20150623.gappssmtp.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id SGn7Fi6f43_n for ; Mon, 9 Sep 2019 10:13:58 -0700 (PDT) Received: from mail-lj1-x229.google.com (mail-lj1-x229.google.com [IPv6:2a00:1450:4864:20::229]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id CEB40120018 for ; Mon, 9 Sep 2019 10:13:57 -0700 (PDT) Received: by mail-lj1-x229.google.com with SMTP id h2so7025409ljk.1 for ; Mon, 09 Sep 2019 10:13:57 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yumaworks-com.20150623.gappssmtp.com; s=20150623; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=7gXhB01YFL6U8SumCzpIp4STBJey+HKiIpTKlyO7JBc=; b=Rs5CUEIoMTjRO3gyp7k8S20vgeEzPwf4OlTq2WCFtuchJIctSMMR4HC4rkmggmiB3p dU6W/78icgcJlrt0iDWRQbZfR65JZhEtZ0UXsf6LIazLunRvY9mv3Ede0YM2XVS0OHcn bYLwL818U5IEkbS1Vk0LtxXdHjq5Zrn+K6acnAl1QmWSj2tO9snO0Muaid0Xc+5pg2Np vaSGY4YNjCEQVSO5rH11NS4JaAX8C3Ysm1GgD50vxuZ7yOCWm5rHAEoKhR47RBdrnb7B PWRJpckQ1H6sLz0Bb+pY6hnOlaGag8Aa2HSP5Gzr8GAQkYy2z9C+qqKtINrH28UstT/y mJ6w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=7gXhB01YFL6U8SumCzpIp4STBJey+HKiIpTKlyO7JBc=; b=eYkpwntXlvHuJ9bviIdAwkMG9D8+X7BLvQsy4+S5sUtcKnDrlbyzUFPJUXdeFd1J3R 5/jq8Het1N7kCJ6ZwScxBrg+pCfXKKONvhBhu55kaNlD4G25YG/1e/5EMqM2Ogij7XS2 mx4M8aTdVt3GhFjV8upcmdcA+4R8+ISkyp9XRJRci9vjuMca/GNBlT9oEasLzyFFPf4O MPYaIjuW0jKqOZ2VZCABtQy30NgDkfEc5SzVsjyO321GwV8yrtFUv2gmpaUBbjR4386C fTGakYS63rMrw4zXRox4xVl+jslooCHj68cfFvU/dh0/52etjRhYDXCyRYBrpVECIdNw t43g== X-Gm-Message-State: APjAAAXTPwfy2qaikJ1OGKHXIDl4CULfuwKqVjNVHx7zoRMf+g4aE2WG 0XtVFCWqUWCkxrzg6yNpgcNKp9NS6KGRxD96tLitCQ== X-Google-Smtp-Source: APXvYqwNfkVza5S/v+Irx3Dq84ndUJbRKA48/g2bTFv3J4EsQAmVZWDIgDEFJInE7EANgROen8yoU8i7B39DjoiA7Ig= X-Received: by 2002:a05:651c:282:: with SMTP id b2mr16200390ljo.50.1568049235801; Mon, 09 Sep 2019 10:13:55 -0700 (PDT) MIME-Version: 1.0 References: <5756FB984666AD4BB8E1D63E2E3AA3D001F20F2C@dggemm513-mbs.china.huawei.com> In-Reply-To: From: Andy Bierman Date: Mon, 9 Sep 2019 10:13:44 -0700 Message-ID: To: "Rob Wilton (rwilton)" Cc: "Fengchong (frank)" , "netmod@ietf.org" , Yangang Content-Type: multipart/alternative; boundary="000000000000b0d266059221e9ce" Archived-At: Subject: Re: [netmod] =?utf-8?q?Please_clarify_implementation_about_=E2=80=98?= =?utf-8?b?d2hlbuKAmQ==?= X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 09 Sep 2019 17:14:01 -0000 --000000000000b0d266059221e9ce Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hi, None of the operations that accept or return datastore contents expose the datastore objects in the RPC parameters. They are always anyxml or anydata. This means that there are no descendant data nodes defined at all according to the RPC operation and therefore the constraints on those nodes do not exist in the RPC operation either. On Mon, Sep 9, 2019 at 6:41 AM Rob Wilton (rwilton) wrote: > Hi Frank, > > > > My interpretation of what the expected behaviour is as follows. > > > > For =E2=80=9Cscene 1=E2=80=9D, the config change is accepted because the = result of the > config datastore after the edit-config has been applied is valid. > > > > For =E2=80=9Cscene 2=E2=80=9D, the config change is rejected because the = result of the > config datastore after the edit-config has been applied is invalid. > > > > My interpretation is that the block of text in 8.3.1 payload parsing is > primary intended to refer to RFC input. E.g. if the RPC was defined > something like below, then the =E2=80=98when=E2=80=99 rule in 8.3.1 would= enforce that a > zip-code can only be provided if the country is the USA. > > > > rpc rock-the-house { > > input { > > leaf country { > > type string; > > } > > leaf zip-code { > > when =E2=80=9C../country =3D =E2=80=98usa=E2=80=99=E2=80=9D; > > type string; > > } > > } > > } > > > > Thanks, > > Rob > > > > > > > > *From:* netmod *On Behalf Of *Fengchong (frank) > *Sent:* 06 September 2019 08:19 > *To:* netmod@ietf.org > *Cc:* Yangang > *Subject:* [netmod] Please clarify implementation about =E2=80=98when=E2= =80=99 > > > > Hi all, > > > > In RFC7950 secton 8, several description about when=EF=BC=9A > In section 8.2 . > Configuration Data Modifications > > o If a request modifies a configuration data node such that any > > node's "when" expression becomes false, then the node in the data > > tree with the "when" expression is deleted by the server. > In 8.3.1 . Payload > Parsing > > o If data for a node tagged with "when" is present and the "when" > > condition evaluates to "false", the server MUST reply with an > > "unknown-element" in the . > > In 8.3.2 . NETCONF > Processing > > Modification requests for nodes tagged with "when", and the "when" > > condition evaluates to "false". In this case, the server MUST > > reply with an "unknown-element" in the . > > > > YANG module=EF=BC=9A > > module foo { > > namespace =E2=80=9Chttp://foo.com=E2=80=9D; > > prefix =E2=80=9Cfoo=E2=80=9D; > > Leaf a {=E2=80=A6} > > Leaf b { > > When =E2=80=9Ca =3D 10=E2=80=9D; > > } > > } > Scene 1: > > The first edit-config request: > > > > > > > > > > > > 3 > > > > > > This request will set a =3D 3. > > > > The second request: > > > > > > > > > > > > 10 > > 5 > > > > > > > > According 8.3.1, in rpc payload parsing phase, the a=E2=80=99s value in c= andidate > datastore is 3,so leaf b=E2=80=99s when condition is evaluated to false, = server > will report =E2=80=98unknown-element=E2=80=99 error. > > Is it expected by user? > Scene 2: > > The first edit-config request: > > > > > > > > > > > > 10 > > > > > > This request will set a =3D 10. > > > > The second request: > > > > > > > > > > > > 3 > > 5 > > > > > > According 8.3.1, in rpc payload parsing phase, the a=E2=80=99s value in c= andidate > datastore is 10, so leaf b=E2=80=99s when condition is evaluated to true,= server > will accept this request in payload parsing phase. > > > > In edit-config request processing phase, if leaf a=E2=80=99s modification= is > processed firstly, the a=E2=80=99s value will be changed to 3, so the b= =E2=80=99s when > condition will be false, when server process b=E2=80=99s modification, b = will be > treated as unknown-element, the edit-config request will fail. > > If leaf b=E2=80=99s modification is processed firstly, server will accept= this > modification ,because b=E2=80=99s when condition is true, and when server= process > a=E2=80=99s modification , this modification will be accepted, and b=E2= =80=99s when > condition will be evaluated to false, leaf b will be deleted automaticall= y, > the edit-config request will be OK. > > > > How server should process this situation? > > > _______________________________________________ > netmod mailing list > netmod@ietf.org > https://www.ietf.org/mailman/listinfo/netmod > --000000000000b0d266059221e9ce Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hi,

None of the operations that accept = or return datastore contents expose the datastore objects
in the = RPC parameters.=C2=A0 They are always anyxml or anydata. This means that
there are no descendant data nodes defined at all according to the = RPC operation
and therefore the constraints on those nodes do not= exist in the RPC operation either.



On M= on, Sep 9, 2019 at 6:41 AM Rob Wilton (rwilton) <rwilton@cisco.com> wrote:

Hi Frank,

=C2=A0<= /span>

My interpretation of = what the expected behaviour is as follows.

=C2=A0<= /span>

For =E2=80=9Cscene 1= =E2=80=9D, the config change is accepted because the result of the config d= atastore after the edit-config has been applied is valid.

=C2=A0<= /span>

For =E2=80=9Cscene 2= =E2=80=9D, the config change is rejected because the result of the config d= atastore after the edit-config has been applied is invalid.

=C2=A0<= /span>

My interpretation is = that the block of text in 8.3.1 payload parsing is primary intended to refe= r to RFC input.=C2=A0 E.g. if the RPC was defined something like below, the= n the =E2=80=98when=E2=80=99 rule in 8.3.1 would enforce that a zip-code can only be provided if the co= untry is the USA.

=C2=A0<= /span>

=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 rpc rock-the-house {

=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 input {

=C2=A0= =C2=A0 =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0leaf country {

=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 type str= ing;

=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 }

=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 leaf zip-code {

=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 when =E2= =80=9C../country =3D =E2=80=98usa=E2=80=99=E2=80=9D;

=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 type str= ing;

=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 }

=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 }

=C2=A0 = =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0}

=C2=A0<= /span>

Thanks,=

Rob

=C2=A0<= /span>

=C2=A0<= /span>

=C2=A0<= /span>

From: netmod <netmod-bounces@ietf.org> On Behalf Of Fengchong (frank)
Sent: 06 September 2019 08:19
To: netmod@ietf= .org
Cc: Yangang <yangang@huawei.com>
Subject: [netmod] Please clarify implementation about =E2=80=98when= =E2=80=99

=C2= =A0

Hi all,

=C2=A0

In RFC7950 secton 8, several de= scription about when=EF=BC=9A

In section 8.2= .=C2=A0 Configuration Data Modifications

=C2=A0= =C2=A0 o=C2=A0 If a request modifies a configuration data node such that an= y

=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0 node's "when" expression becomes fal= se, then the node in the data

=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0 tree with the "when" expression is delet= ed by the server.

In 8.3.1.=C2=A0 Payload Parsing<= u>

=C2=A0=C2=A0=
 o=C2=A0 If data for a node tagged with "when" is present and the=
 "when"
=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0 condition evaluates to "false", the server MUS=
T reply with an
=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0 "unknown-element" <error-tag> in the <=
;rpc-error>.

In 8.3.2.=C2=A0 NETCONF <edit-config= > Processing

Modification=
 requests for nodes tagged with "when", and the "when"<=
u>
=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0 condition evaluates to "false".=C2=A0 In this =
case, the server MUST
=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0 reply with an "unknown-element" <error-tag&=
gt; in the <rpc-error>.

=C2=A0

YANG module=EF=BC=9A<= u>

module foo {

=C2=A0=C2=A0 namespace =E2=80= =9Chttp://foo.com=E2=80=9D= ;

=C2=A0=C2=A0 prefix =E2=80=9Cfo= o=E2=80=9D;

L= eaf a {=E2=80=A6}

L= eaf b {

= =C2=A0 When =E2=80=9Ca =3D 10=E2=80=9D;

}=

}

Scene 1:

The first edit-config request:<= u>

<edit-config>

=C2=A0=C2=A0 <target><= /u>

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 = <candidate/>

=C2=A0=C2=A0 </target>

=C2=A0=C2=A0=C2=A0<config>= ;

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 = <a xmlns=3D =E2=80=9Chttp:/= /foo.com=E2=80=9D>3</a>

=C2=A0=C2=A0 </config>=

</edit-config><= /u>

This request will set a =3D 3.<= u>

=C2=A0

The second request:

<edit-config>

=C2=A0=C2=A0 <target><= /u>

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 = <candidate/>

=C2=A0=C2=A0 </target>

=C2=A0=C2=A0=C2=A0<config>= ;

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 = <a xmlns=3D =E2=80=9Chttp:/= /foo.com=E2=80=9D>10</a>

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 = <b xmlns=3D =E2=80=9Chttp:/= /foo.com=E2=80=9D>5</b>

=C2=A0=C2=A0 </config>=

</edit-config><= /u>

=C2=A0

Accord= ing 8.3.1, in rpc payload parsing phase, the a=E2=80=99s value in candidate= datastore is 3,so leaf b=E2=80=99s when condition is evaluated to false, s= erver will report =E2=80=98unknown-element=E2=80=99 error.

Is it = expected by user?

Scene 2:

The first edit-config request:<= u>

<edit-config>

=C2=A0=C2=A0 <target><= /u>

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 = <candidate/>

=C2=A0=C2=A0 </target>

=C2=A0=C2=A0=C2=A0<config>= ;

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 = <a xmlns=3D =E2=80=9Chttp:/= /foo.com=E2=80=9D>10</a>

=C2=A0=C2=A0 </config>=

</edit-config><= /u>

This request will set a =3D 10.=

=C2=A0

The second request:

<edit-config>

=C2=A0=C2=A0 <target><= /u>

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 = <candidate/>

=C2=A0=C2=A0 </target>

=C2=A0=C2=A0=C2=A0<config>= ;

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 = <a xmlns=3D =E2=80=9Chttp:/= /foo.com=E2=80=9D>3</a>

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 = <b xmlns=3D =E2=80=9Chttp:/= /foo.com=E2=80=9D>5</b>

=C2=A0=C2=A0 </config>=

</edit-config><= /u>

Accord= ing 8.3.1, in rpc payload parsing phase, the a=E2=80=99s value in candidate= datastore is 10, so leaf b=E2=80=99s when condition is evaluated to true, = server will accept this request in payload parsing phase.

=C2=A0

In edi= t-config request processing phase, if leaf a=E2=80=99s modification is proc= essed firstly, the a=E2=80=99s value will be changed to 3, so the b=E2=80= =99s when condition will be false, when server process b=E2=80=99s modifica= tion, b will be treated as unknown-element, the edit-config request will fail. <= u>

If lea= f b=E2=80=99s modification is processed firstly, server will accept this mo= dification ,because b=E2=80=99s when condition is true, and when server pro= cess a=E2=80=99s modification , this modification will be accepted, and b=E2=80=99s when condition will be evaluated to false, leaf b will be = deleted automatically, the edit-config request will be OK.

=C2=A0

How se= rver should process this situation?

=C2=A0

_______________________________________________
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--000000000000b0d266059221e9ce-- From nobody Mon Sep 9 12:12:42 2019 Return-Path: X-Original-To: netmod@ietfa.amsl.com Delivered-To: netmod@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id C3B891200A4; Mon, 9 Sep 2019 12:12:33 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -4.2 X-Spam-Level: X-Spam-Status: No, score=-4.2 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id s-W3OYR5Oc1G; Mon, 9 Sep 2019 12:12:32 -0700 (PDT) Received: from rfc-editor.org (rfc-editor.org [4.31.198.49]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id F1C58120020; Mon, 9 Sep 2019 12:12:31 -0700 (PDT) Received: by rfc-editor.org (Postfix, from userid 30) id 125F0B82270; Mon, 9 Sep 2019 12:12:31 -0700 (PDT) To: peter.loborg@ericsson.com, mbj@tail-f.com X-PHP-Originating-Script: 30:errata_mail_lib.php From: RFC Errata System Cc: warren@kumari.net, iesg@ietf.org, netmod@ietf.org, rfc-editor@rfc-editor.org Content-Type: text/plain; charset=UTF-8 Message-Id: <20190909191231.125F0B82270@rfc-editor.org> Date: Mon, 9 Sep 2019 12:12:31 -0700 (PDT) Archived-At: Subject: [netmod] [Errata Rejected] RFC7950 (5856) X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 09 Sep 2019 19:12:34 -0000 The following errata report has been rejected for RFC7950, "The YANG 1.1 Data Modeling Language". -------------------------------------- You may review the report below and at: https://www.rfc-editor.org/errata/eid5856 -------------------------------------- Status: Rejected Type: Editorial Reported by: Peter Loborg Date Reported: 2019-02-21 Rejected by: Warren Kumari (Ops AD) (IESG) Section: 9.6.4 Original Text ------------- It takes as an argument a string that is the assigned name. Corrected Text -------------- It takes as an argument an unquoted string that is the assigned name. Notes ----- Readers are not beeing made aware that careful reading of section 6.1.3 and the detailed definition of string in section 14 must be consulted. For comming versions of this RFC it would be preferable to use a more specialized grammar token for these cases (e.g. unquoted-string). --VERIFIER NOTES-- Please see the thread https://mailarchive.ietf.org/arch/browse/netmod/?gbt=1&index=L3rZ7qFjnpsPeRJ4FfJZegWXdig for further discussions. -------------------------------------- RFC7950 (draft-ietf-netmod-rfc6020bis-14) -------------------------------------- Title : The YANG 1.1 Data Modeling Language Publication Date : August 2016 Author(s) : M. Bjorklund, Ed. Category : PROPOSED STANDARD Source : Network Modeling Area : Operations and Management Stream : IETF Verifying Party : IESG From nobody Mon Sep 9 12:16:00 2019 Return-Path: X-Original-To: netmod@ietfa.amsl.com Delivered-To: netmod@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id DABBB1200B7; Mon, 9 Sep 2019 12:15:52 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -4.2 X-Spam-Level: X-Spam-Status: No, score=-4.2 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id ZimzDW6qasEN; Mon, 9 Sep 2019 12:15:51 -0700 (PDT) Received: from rfc-editor.org (rfc-editor.org [4.31.198.49]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 679EA1200A4; Mon, 9 Sep 2019 12:15:51 -0700 (PDT) Received: by rfc-editor.org (Postfix, from userid 30) id 7A80FB80B0F; Mon, 9 Sep 2019 12:15:50 -0700 (PDT) To: jernej.tuljak@mg-soft.si, mbj@tail-f.com X-PHP-Originating-Script: 30:errata_mail_lib.php From: RFC Errata System Cc: warren@kumari.net, iesg@ietf.org, netmod@ietf.org, rfc-editor@rfc-editor.org Content-Type: text/plain; charset=UTF-8 Message-Id: <20190909191550.7A80FB80B0F@rfc-editor.org> Date: Mon, 9 Sep 2019 12:15:50 -0700 (PDT) Archived-At: Subject: [netmod] [Errata Verified] RFC7950 (5807) X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 09 Sep 2019 19:15:53 -0000 The following errata report has been verified for RFC7950, "The YANG 1.1 Data Modeling Language". -------------------------------------- You may review the report below and at: https://www.rfc-editor.org/errata/eid5807 -------------------------------------- Status: Verified Type: Technical Reported by: Jernej Tuljak Date Reported: 2019-08-13 Verified by: Warren Kumari (Ops AD) (IESG) Section: 7.21.5. Original Text ------------- o If the "when" statement is a child of a "uses", "choice", or "case" statement, then the context node is the closest ancestor node to the node with the "when" statement that is also a data node. If no such node exists, the context node is the root node. The accessible tree is tentatively altered during the processing of the XPath expression by removing all instances (if any) of the nodes added by the "uses", "choice", or "case" statement. Corrected Text -------------- o If the "when" statement is a child of a "uses", "choice", or "case" statement, then the context node is the closest ancestor node to the node with the "when" statement that is also a data node, rpc, action or notification. If no such node exists, the context node is the root node. The accessible tree is tentatively altered during the processing of the XPath expression by removing all instances (if any) of the nodes added by the "uses", "choice", or "case" statement. Notes ----- Similar to verified errata 4794 (https://www.rfc-editor.org/errata/eid4794) but covers the "uses", "choice" and "case" corner case (instead of "augment"). If the node for which the "when" statement is defined is within an rpc, action or notification, the context node also needs to be inside that rpc, action or notification. There are published IETF modules, which rely on this to be true, such as "ietf-netconf-nmda@2019-01-07" in RFC8526 (https://tools.ietf.org/html/rfc8526) at schema node id "/ncds:get-data/ncds:input/ncds:origin-filters". Original text assigns the context node to the root node, if no data node ancestor is found. "rpc", "action" and "notification" are not data nodes and are represented by nodes that are descendants of the root node, as described in Section 6.4.1. -------------------------------------- RFC7950 (draft-ietf-netmod-rfc6020bis-14) -------------------------------------- Title : The YANG 1.1 Data Modeling Language Publication Date : August 2016 Author(s) : M. Bjorklund, Ed. Category : PROPOSED STANDARD Source : Network Modeling Area : Operations and Management Stream : IETF Verifying Party : IESG From nobody Mon Sep 9 19:00:15 2019 Return-Path: X-Original-To: netmod@ietfa.amsl.com Delivered-To: netmod@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id A176D12009C for ; Mon, 9 Sep 2019 19:00:12 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -4.199 X-Spam-Level: X-Spam-Status: No, score=-4.199 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_MED=-2.3, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id TCC-8e6AmGRi for ; Mon, 9 Sep 2019 19:00:09 -0700 (PDT) Received: from huawei.com (lhrrgout.huawei.com [185.176.76.210]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 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header.d=yumaworks-com.20150623.gappssmtp.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id QNNEqO1f57B3 for ; Mon, 9 Sep 2019 19:19:43 -0700 (PDT) Received: from mail-lj1-x22e.google.com (mail-lj1-x22e.google.com [IPv6:2a00:1450:4864:20::22e]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 032B3120024 for ; Mon, 9 Sep 2019 19:19:43 -0700 (PDT) Received: by mail-lj1-x22e.google.com with SMTP id 7so14721751ljw.7 for ; Mon, 09 Sep 2019 19:19:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yumaworks-com.20150623.gappssmtp.com; s=20150623; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=EhOQpFe7vfPmmeIG1NpRpp1menQ5Z+xMJ8qOLY8Russ=; b=IiIkNrf4dwzIYuSa3TbCi0dAJQ3d1bR7gtlNNLeJzJmsSlGhT7iPvwlmsU5Ml+5hZH 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X-Google-Smtp-Source: APXvYqwZXfYYS5pZ9MiNonRD0bME/IsFgpEcNbrkhIL7CjP9QjEqlGNtA7vc+5srYrfhPLyxwnhpTBYTA9RpgbP17/s= X-Received: by 2002:a2e:3102:: with SMTP id x2mr9581525ljx.218.1568081981089; Mon, 09 Sep 2019 19:19:41 -0700 (PDT) MIME-Version: 1.0 References: <5756FB984666AD4BB8E1D63E2E3AA3D001F20F2C@dggemm513-mbs.china.huawei.com> <5756FB984666AD4BB8E1D63E2E3AA3D001F2CBA8@dggemm513-mbx.china.huawei.com> In-Reply-To: <5756FB984666AD4BB8E1D63E2E3AA3D001F2CBA8@dggemm513-mbx.china.huawei.com> From: Andy Bierman Date: Mon, 9 Sep 2019 19:19:29 -0700 Message-ID: To: "Fengchong (frank)" Cc: "Rob Wilton (rwilton)" , "netmod@ietf.org" , Yangang Content-Type: multipart/related; boundary="00000000000076665b0592298949" Archived-At: Subject: Re: [netmod] =?utf-8?q?Please_clarify_implementation_about_=E2=80=98?= =?utf-8?b?d2hlbuKAmQ==?= X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 10 Sep 2019 02:19:48 -0000 --00000000000076665b0592298949 Content-Type: multipart/alternative; boundary="0000000000007666520592298948" --0000000000007666520592298948 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Mon, Sep 9, 2019 at 7:10 PM Fengchong (frank) wrote: > Hi andy, > > > > You only talk about the constraints on rpc operation=E2=80=99s parameter? > > > > Do you have any opinion about my question? > 8.3.1 does not apply to leaf 'b'. The RPC parameter is called 'config'. It has no when-stmts to evaluate. Rob is correct. His example shows what 8.3.1 would cover. Andy > > ------------------------------ > > =E5=8D=8E=E4=B8=BA=E6=8A=80=E6=9C=AF=E6=9C=89=E9=99=90=E5=85=AC=E5=8F=B8 = Huawei Technologies Co., Ltd. > > [image: Company_logo] > > =E4=B8=AA=E4=BA=BA=E7=AD=BE=E5=90=8D=EF=BC=9A=E5=86=AF=E5=86=B2 > =E6=89=8B =E6=9C=BA=EF=BC=9A13776612983 > =E7=94=B5=E5=AD=90=E9=82=AE=E4=BB=B6=EF=BC=9Afrank.fengchong@huawei.com > =E5=85=AC=E5=8F=B8=E7=BD=91=E5=9D=80=EF=BC=9Awww.huawei.com > ------------------------------ > > =EF=BB=BF =E6=9C=AC=E9=82=AE=E4=BB=B6=E5=8F=8A=E5=85=B6=E9=99=84=E4=BB=B6= =E5=90=AB=E6=9C=89=E5=8D=8E=E4=B8=BA=E5=85=AC=E5=8F=B8=E7=9A=84=E4=BF=9D=E5= =AF=86=E4=BF=A1=E6=81=AF=EF=BC=8C=E4=BB=85=E9=99=90=E4=BA=8E=E5=8F=91=E9=80= =81=E7=BB=99=E4=B8=8A=E9=9D=A2=E5=9C=B0=E5=9D=80=E4=B8=AD=E5=88=97=E5=87=BA= =E7=9A=84=E4=B8=AA=E4=BA=BA=E6=88=96=E7=BE=A4=E7=BB=84=E3=80=82=E7=A6=81 > =E6=AD=A2=E4=BB=BB=E4=BD=95=E5=85=B6=E4=BB=96=E4=BA=BA=E4=BB=A5=E4=BB=BB= =E4=BD=95=E5=BD=A2=E5=BC=8F=E4=BD=BF=E7=94=A8=EF=BC=88=E5=8C=85=E6=8B=AC=E4= =BD=86=E4=B8=8D=E9=99=90=E4=BA=8E=E5=85=A8=E9=83=A8=E6=88=96=E9=83=A8=E5=88= =86=E5=9C=B0=E6=B3=84=E9=9C=B2=E3=80=81=E5=A4=8D=E5=88=B6=E3=80=81=E6=88=96= =E6=95=A3=E5=8F=91=EF=BC=89=E6=9C=AC=E9=82=AE=E4=BB=B6=E4=B8=AD > =E7=9A=84=E4=BF=A1=E6=81=AF=E3=80=82=E5=A6=82=E6=9E=9C=E6=82=A8=E9=94=99= =E6=94=B6=E4=BA=86=E6=9C=AC=E9=82=AE=E4=BB=B6=EF=BC=8C=E8=AF=B7=E6=82=A8=E7= =AB=8B=E5=8D=B3=E7=94=B5=E8=AF=9D=E6=88=96=E9=82=AE=E4=BB=B6=E9=80=9A=E7=9F= =A5=E5=8F=91=E4=BB=B6=E4=BA=BA=E5=B9=B6=E5=88=A0=E9=99=A4=E6=9C=AC=E9=82=AE= =E4=BB=B6=EF=BC=81 > This e-mail and its attachments contain confidential information from > HUAWEI, which > is intended only for the person or entity whose address is listed above. > Any use of the > information contained herein in any way (including, but not limited to, > total or partial > disclosure, reproduction, or dissemination) by persons other than the > intended > recipient(s) is prohibited. If you receive this e-mail in error, please > notify the sender by > phone or email immediately and delete it! > > > > *=E5=8F=91=E4=BB=B6=E4=BA=BA:* Andy Bierman [mailto:andy@yumaworks.com] > *=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4:* 2019=E5=B9=B49=E6=9C=8810=E6=97= =A5 1:14 > *=E6=94=B6=E4=BB=B6=E4=BA=BA:* Rob Wilton (rwilton) > *=E6=8A=84=E9=80=81:* Fengchong (frank) ; net= mod@ietf.org; > Yangang > *=E4=B8=BB=E9=A2=98:* Re: [netmod] Please clarify implementation about = =E2=80=98when=E2=80=99 > > > > Hi, > > > > None of the operations that accept or return datastore contents expose th= e > datastore objects > > in the RPC parameters. They are always anyxml or anydata. This means tha= t > > there are no descendant data nodes defined at all according to the RPC > operation > > and therefore the constraints on those nodes do not exist in the RPC > operation either. > > > > > > > > On Mon, Sep 9, 2019 at 6:41 AM Rob Wilton (rwilton) > wrote: > > Hi Frank, > > > > My interpretation of what the expected behaviour is as follows. > > > > For =E2=80=9Cscene 1=E2=80=9D, the config change is accepted because the = result of the > config datastore after the edit-config has been applied is valid. > > > > For =E2=80=9Cscene 2=E2=80=9D, the config change is rejected because the = result of the > config datastore after the edit-config has been applied is invalid. > > > > My interpretation is that the block of text in 8.3.1 payload parsing is > primary intended to refer to RFC input. E.g. if the RPC was defined > something like below, then the =E2=80=98when=E2=80=99 rule in 8.3.1 would= enforce that a > zip-code can only be provided if the country is the USA. > > > > rpc rock-the-house { > > input { > > leaf country { > > type string; > > } > > leaf zip-code { > > when =E2=80=9C../country =3D =E2=80=98usa=E2=80=99=E2=80=9D; > > type string; > > } > > } > > } > > > > Thanks, > > Rob > > > > > > > > *From:* netmod *On Behalf Of *Fengchong (frank) > *Sent:* 06 September 2019 08:19 > *To:* netmod@ietf.org > *Cc:* Yangang > *Subject:* [netmod] Please clarify implementation about =E2=80=98when=E2= =80=99 > > > > Hi all, > > > > In RFC7950 secton 8, several description about when=EF=BC=9A > In section 8.2 . > Configuration Data Modifications > > o If a request modifies a configuration data node such that any > > node's "when" expression becomes false, then the node in the data > > tree with the "when" expression is deleted by the server. > In 8.3.1 . Payload > Parsing > > o If data for a node tagged with "when" is present and the "when" > > condition evaluates to "false", the server MUST reply with an > > "unknown-element" in the . > > In 8.3.2 . NETCONF > Processing > > Modification requests for nodes tagged with "when", and the "when" > > condition evaluates to "false". In this case, the server MUST > > reply with an "unknown-element" in the . > > > > YANG module=EF=BC=9A > > module foo { > > namespace =E2=80=9Chttp://foo.com=E2=80=9D; > > prefix =E2=80=9Cfoo=E2=80=9D; > > Leaf a {=E2=80=A6} > > Leaf b { > > When =E2=80=9Ca =3D 10=E2=80=9D; > > } > > } > Scene 1: > > The first edit-config request: > > > > > > > > > > > > 3 > > > > > > This request will set a =3D 3. > > > > The second request: > > > > > > > > > > > > 10 > > 5 > > > > > > > > According 8.3.1, in rpc payload parsing phase, the a=E2=80=99s value in c= andidate > datastore is 3,so leaf b=E2=80=99s when condition is evaluated to false, = server > will report =E2=80=98unknown-element=E2=80=99 error. > > Is it expected by user? > Scene 2: > > The first edit-config request: > > > > > > > > > > > > 10 > > > > > > This request will set a =3D 10. > > > > The second request: > > > > > > > > > > > > 3 > > 5 > > > > > > According 8.3.1, in rpc payload parsing phase, the a=E2=80=99s value in c= andidate > datastore is 10, so leaf b=E2=80=99s when condition is evaluated to true,= server > will accept this request in payload parsing phase. > > > > In edit-config request processing phase, if leaf a=E2=80=99s modification= is > processed firstly, the a=E2=80=99s value will be changed to 3, so the b= =E2=80=99s when > condition will be false, when server process b=E2=80=99s modification, b = will be > treated as unknown-element, the edit-config request will fail. > > If leaf b=E2=80=99s modification is processed firstly, server will accept= this > modification ,because b=E2=80=99s when condition is true, and when server= process > a=E2=80=99s modification , this modification will be accepted, and b=E2= =80=99s when > condition will be evaluated to false, leaf b will be deleted automaticall= y, > the edit-config request will be OK. > > > > How server should process this situation? > > > > _______________________________________________ > netmod mailing list > netmod@ietf.org > https://www.ietf.org/mailman/listinfo/netmod > > --0000000000007666520592298948 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable


=
On Mon, Sep 9, 2019 at 7:10 PM Fengch= ong (frank) <frank.fengchong@huawei.com> wrote:

Hi andy,

=C2=A0=

You only talk about the con= straints on rpc operation=E2=80=99s parameter?

=C2=A0=

Do you have any opinion abo= ut my question?


8.3.= 1 does not apply to leaf 'b'.
The RPC parameter is called= 'config'.
It has no when-stmts to evaluate.
Ro= b is correct.
His example shows what 8.3.1 would cover.

Andy

=C2=A0

=C2=A0=

=E5=8D=8E=E4=B8= =BA=E6=8A=80=E6=9C=AF=E6=9C=89=E9=99=90=E5=85=AC=E5=8F=B8 Huawei Technologies Co., Ltd.

=

=E4=B8=AA=E4=BA= =BA=E7=AD=BE=E5=90=8D=EF=BC=9A=E5=86=AF=E5=86=B2
=E6=89=8B=E3=80=80=E3=80=80=E6=9C=BA=EF=BC=9A13= 776612983
=E7=94=B5=E5=AD=90=E9=82=AE=E4=BB=B6=EF=BC=9Afrank.fengcho= ng@huawei.com
=E5=85=AC=E5=8F=B8=E7=BD=91=E5=9D=80=EF=BC=9Awww.huawei.com=

= =EF=BB=BF =E6=9C=AC=E9=82=AE=E4=BB= =B6=E5=8F=8A=E5=85=B6=E9=99=84=E4=BB=B6=E5=90=AB=E6=9C=89=E5=8D=8E=E4=B8=BA= =E5=85=AC=E5=8F=B8=E7=9A=84=E4=BF=9D=E5=AF=86=E4=BF=A1=E6=81=AF=EF=BC=8C=E4= =BB=85=E9=99=90=E4=BA=8E=E5=8F=91=E9=80=81=E7=BB=99=E4=B8=8A=E9=9D=A2=E5=9C= =B0=E5=9D=80=E4=B8=AD=E5=88=97=E5=87=BA=E7=9A=84=E4=B8=AA=E4=BA=BA=E6=88=96= =E7=BE=A4=E7=BB=84=E3=80=82=E7=A6=81
=E6=AD=A2=E4=BB=BB=E4=BD= =95=E5=85=B6=E4=BB=96=E4=BA=BA=E4=BB=A5=E4=BB=BB=E4=BD=95=E5=BD=A2=E5=BC=8F= =E4=BD=BF=E7=94=A8=EF=BC=88=E5=8C=85=E6=8B=AC=E4=BD=86=E4=B8=8D=E9=99=90=E4= =BA=8E=E5=85=A8=E9=83=A8=E6=88=96=E9=83=A8=E5=88=86=E5=9C=B0=E6=B3=84=E9=9C= =B2=E3=80=81=E5=A4=8D=E5=88=B6=E3=80=81=E6=88=96=E6=95=A3=E5=8F=91=EF=BC=89= =E6=9C=AC=E9=82=AE=E4=BB=B6=E4=B8=AD
=E7=9A=84=E4=BF=A1=E6=81= =AF=E3=80=82=E5=A6=82=E6=9E=9C=E6=82=A8=E9=94=99=E6=94=B6=E4=BA=86=E6=9C=AC= =E9=82=AE=E4=BB=B6=EF=BC=8C=E8=AF=B7=E6=82=A8=E7=AB=8B=E5=8D=B3=E7=94=B5=E8= =AF=9D=E6=88=96=E9=82=AE=E4=BB=B6=E9=80=9A=E7=9F=A5=E5=8F=91=E4=BB=B6=E4=BA= =BA=E5=B9=B6=E5=88=A0=E9=99=A4=E6=9C=AC=E9=82=AE=E4=BB=B6=EF=BC=81
This e-mail and its attachments contain confidential information from HUAWE= I, which
is intended only for the person or entity whose address is listed above. An= y use of the
information contained herein in any way (including, but not limited to, tot= al or partial
disclosure, reproduction, or dissemination) by persons other than the inten= ded
recipient(s) is prohibited. If you receive this e-mail in error, please not= ify the sender by
phone or email immediately and delete it!

=C2=A0=

=E5=8F=91=E4=BB=B6=E4=BA=BA: Andy Bie= rman [mailto:andy@y= umaworks.com]
=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4: 2019=E5=B9=B49=E6=9C=8810=E6=97=A5 1:14
=E6=94=B6=E4=BB=B6=E4=BA=BA: Rob Wilton (rwilton) <rwilton@cisco.com>
=E6=8A=84=E9=80=81: Fengchong (frank) <frank.fengchong@huawei.com>; netmod@ietf.org; Yangang <yangang@huawei.com>=
=E4=B8=BB=E9=A2=98: Re: [netmod] Please clarify implementation about =E2=80=98when=E2=80=99

=C2=A0

Hi,

=C2=A0

None of the operations that acc= ept or return datastore contents expose the datastore objects=

in the RPC parameters.=C2=A0 Th= ey are always anyxml or anydata. This means that

there are no descendant data no= des defined at all according to the RPC operation

and therefore the constraints o= n those nodes do not exist in the RPC operation either.

=C2=A0

=C2=A0

=C2=A0

On Mon, Sep 9, 2019 at 6:41 AM = Rob Wilton (rwilton) <rwilton@cisco.com> wrote:

Hi Fra= nk,

=C2=A0=

My int= erpretation of what the expected behaviour is as follows.

=C2=A0=

For = =E2=80=9Cscene 1=E2=80=9D, the config change is accepted because the result= of the config datastore after the edit-config has been applied is valid.

=C2=A0=

For = =E2=80=9Cscene 2=E2=80=9D, the config change is rejected because the result= of the config datastore after the edit-config has been applied is invalid.=

=C2=A0=

My int= erpretation is that the block of text in 8.3.1 payload parsing is primary i= ntended to refer to RFC input.=C2=A0 E.g. if the RPC was defined something like below, then the =E2=80=98when=E2=80=99 rule in 8.3.= 1 would enforce that a zip-code can only be provided if the country is the = USA.

=C2=A0=

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0 rpc rock-the-house {

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0 input {

=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0leaf country {=

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 type string;

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0 }

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0 leaf zip-code {<= /u>

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 when =E2=80=9C../country =3D =E2=80= =98usa=E2=80=99=E2=80=9D;<= /p>

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 type string;

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0 }

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0 }

=C2=A0 =C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0}

=C2=A0=

Thanks= ,

Rob

=C2=A0=

=C2=A0=

=C2=A0=

Fro= m: netmod <netmod-bounces@iet= f.org> On Behalf Of Fengchong (frank)
Sent: 06 September 2019 08:19
To: netmod@ietf= .org
Cc: Yangang <yangang@huawei.com>
Subject: [netmod] Please clarify implementation about =E2=80=98when= =E2=80=99

=C2=A0

Hi all,

=C2=A0

In RFC7950 secton 8, several de= scription about when=EF=BC=9A

In section 8.2.=C2=A0 Co= nfiguration Data Modifications

=C2=A0=C2=A0 o=C2=A0 If a request modifies a configuration data node = such that any

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 node's "when" expression= becomes false, then the node in the data

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 tree with the "when" express= ion is deleted by the server.

In 8.3.1.=C2=A0 Payload Parsing

=C2=A0=C2=A0=
 o=C2=A0 If data for a node tagged with "when" is present and the=
 "when"
=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0 condition evaluates to "false", the server MUS=
T reply with an
=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0 "unknown-element" <error-tag> in the <=
;rpc-error>.

In 8.3.2.=C2=A0 NETCONF <edit-config> Processing

Modification=
 requests for nodes tagged with "when", and the "when"<=
/span>
=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0 condition evaluates to "false".=C2=A0 In this =
case, the server MUST

=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0 reply with an "unknown-element" <error-tag&=
gt; in the <rpc-error>.


=C2=A0


YANG module=EF=BC=9A


module foo {


=C2=A0=C2=A0 namespace =E2=80=
=9Chttp://foo.com=E2=80=9D=
;


=C2=A0=C2=A0 prefix =E2=80=9Cfo=
o=E2=80=9D;



Leaf a {=E2=80=A6}<=
u>



Leaf b {



=C2=A0 When =E2=80=9Ca =3D 10=E2=80=9D;



}


}


Scene 1: 


The first edit-config request:<=
/span>


<edit-config>


=C2=A0=C2=A0 <target>


=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
<candidate/>


=C2=A0=C2=A0 </target>



=C2=A0=C2=A0=C2=A0<config>=
;


=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
<a xmlns=3D =E2=80=9Chttp:/=
/foo.com=E2=80=9D>3</a><=
/u>


=C2=A0=C2=A0 </config>


</edit-config>


This request will set a =3D 3.<=
/span>


=C2=A0


The second request:


<edit-config>


=C2=A0=C2=A0 <target>


=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
<candidate/>


=C2=A0=C2=A0 </target>



=C2=A0=C2=A0=C2=A0<config>=
;


=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
<a xmlns=3D =E2=80=9Chttp:/=
/foo.com=E2=80=9D>10</a>=



=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
<b xmlns=3D =E2=80=9Chttp:/=
/foo.com=E2=80=9D>5</b><=
/u>


=C2=A0=C2=A0 </config>


</edit-config>


=C2=A0


Accord=
ing 8.3.1, in rpc payload parsing phase, the a=E2=80=99s value in candidate=
 datastore is 3,so leaf b=E2=80=99s when condition is evaluated to false,
 server will report =E2=80=98unknown-element=E2=80=99 error.


Is it =
expected by user?


Scene 2:=



The first edit-config request:<=
/span>


<edit-config>


=C2=A0=C2=A0 <target>


=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
<candidate/>


=C2=A0=C2=A0 </target>



=C2=A0=C2=A0=C2=A0<config>=
;


=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
<a xmlns=3D =E2=80=9Chttp:/=
/foo.com=E2=80=9D>10</a>=



=C2=A0=C2=A0 </config>


</edit-config>


This request will set a =3D 10.=



=C2=A0


The second request:


<edit-config>


=C2=A0=C2=A0 <target>


=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
<candidate/>


=C2=A0=C2=A0 </target>



=C2=A0=C2=A0=C2=A0<config>=
;


=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
<a xmlns=3D =E2=80=9Chttp:/=
/foo.com=E2=80=9D>3</a><=
/u>


=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
<b xmlns=3D =E2=80=9Chttp:/=
/foo.com=E2=80=9D>5</b><=
/u>


=C2=A0=C2=A0 </config>


</edit-config>


Accord=
ing 8.3.1, in rpc payload parsing phase, the a=E2=80=99s value in candidate=
 datastore is 10, so leaf b=E2=80=99s when condition is evaluated to
 true, server will accept this request in payload parsing phase. 


=C2=A0=



In edi=
t-config request processing phase, if leaf a=E2=80=99s modification is proc=
essed firstly, the a=E2=80=99s value will be changed to 3, so the b=E2=80=
=99s
 when condition will be false, when server process b=E2=80=99s modification=
, b will be treated as unknown-element, the edit-config request will fail.



If lea=
f b=E2=80=99s modification is processed firstly, server will accept this mo=
dification ,because b=E2=80=99s when condition is true, and when server
 process a=E2=80=99s modification , this modification will be accepted, and=
 b=E2=80=99s when condition will be evaluated to false, leaf b will be dele=
ted automatically, the edit-config request will be OK.


=C2=A0=



How se=
rver should process this situation?


=C2=A0

_______________________________= ________________
netmod mailing list
netmod@ietf.org = https://www.ietf.org/mailman/listinfo/netmod

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"Rob Wilton (rwilton)" , "netmod@ietf.org" , Yangang Content-Type: multipart/related; boundary="000000000000a302e7059229d21f" Archived-At: Subject: Re: [netmod] =?utf-8?q?Please_clarify_implementation_about_=E2=80=98?= =?utf-8?b?d2hlbuKAmQ==?= X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 10 Sep 2019 02:40:15 -0000 --000000000000a302e7059229d21f Content-Type: multipart/alternative; boundary="000000000000a302e6059229d21e" --000000000000a302e6059229d21e Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hi, I see you are asking about when the server removes data nodes with false when-stmts. Our server would accept scene 1 and reject scene 2. The when-stmts are evaluated against the desired datastore (same as leafref validation) after all the modifications are considered. Andy On Mon, Sep 9, 2019 at 7:10 PM Fengchong (frank) wrote: > Hi andy, > > > > You only talk about the constraints on rpc operation=E2=80=99s parameter? > > > > Do you have any opinion about my question? > > > ------------------------------ > > =E5=8D=8E=E4=B8=BA=E6=8A=80=E6=9C=AF=E6=9C=89=E9=99=90=E5=85=AC=E5=8F=B8 = Huawei Technologies Co., Ltd. > > [image: Company_logo] > > =E4=B8=AA=E4=BA=BA=E7=AD=BE=E5=90=8D=EF=BC=9A=E5=86=AF=E5=86=B2 > =E6=89=8B =E6=9C=BA=EF=BC=9A13776612983 > =E7=94=B5=E5=AD=90=E9=82=AE=E4=BB=B6=EF=BC=9Afrank.fengchong@huawei.com > =E5=85=AC=E5=8F=B8=E7=BD=91=E5=9D=80=EF=BC=9Awww.huawei.com > ------------------------------ > > =EF=BB=BF =E6=9C=AC=E9=82=AE=E4=BB=B6=E5=8F=8A=E5=85=B6=E9=99=84=E4=BB=B6= =E5=90=AB=E6=9C=89=E5=8D=8E=E4=B8=BA=E5=85=AC=E5=8F=B8=E7=9A=84=E4=BF=9D=E5= =AF=86=E4=BF=A1=E6=81=AF=EF=BC=8C=E4=BB=85=E9=99=90=E4=BA=8E=E5=8F=91=E9=80= =81=E7=BB=99=E4=B8=8A=E9=9D=A2=E5=9C=B0=E5=9D=80=E4=B8=AD=E5=88=97=E5=87=BA= =E7=9A=84=E4=B8=AA=E4=BA=BA=E6=88=96=E7=BE=A4=E7=BB=84=E3=80=82=E7=A6=81 > =E6=AD=A2=E4=BB=BB=E4=BD=95=E5=85=B6=E4=BB=96=E4=BA=BA=E4=BB=A5=E4=BB=BB= =E4=BD=95=E5=BD=A2=E5=BC=8F=E4=BD=BF=E7=94=A8=EF=BC=88=E5=8C=85=E6=8B=AC=E4= =BD=86=E4=B8=8D=E9=99=90=E4=BA=8E=E5=85=A8=E9=83=A8=E6=88=96=E9=83=A8=E5=88= =86=E5=9C=B0=E6=B3=84=E9=9C=B2=E3=80=81=E5=A4=8D=E5=88=B6=E3=80=81=E6=88=96= =E6=95=A3=E5=8F=91=EF=BC=89=E6=9C=AC=E9=82=AE=E4=BB=B6=E4=B8=AD > =E7=9A=84=E4=BF=A1=E6=81=AF=E3=80=82=E5=A6=82=E6=9E=9C=E6=82=A8=E9=94=99= =E6=94=B6=E4=BA=86=E6=9C=AC=E9=82=AE=E4=BB=B6=EF=BC=8C=E8=AF=B7=E6=82=A8=E7= =AB=8B=E5=8D=B3=E7=94=B5=E8=AF=9D=E6=88=96=E9=82=AE=E4=BB=B6=E9=80=9A=E7=9F= =A5=E5=8F=91=E4=BB=B6=E4=BA=BA=E5=B9=B6=E5=88=A0=E9=99=A4=E6=9C=AC=E9=82=AE= =E4=BB=B6=EF=BC=81 > This e-mail and its attachments contain confidential information from > HUAWEI, which > is intended only for the person or entity whose address is listed above. > Any use of the > information contained herein in any way (including, but not limited to, > total or partial > disclosure, reproduction, or dissemination) by persons other than the > intended > recipient(s) is prohibited. If you receive this e-mail in error, please > notify the sender by > phone or email immediately and delete it! > > > > *=E5=8F=91=E4=BB=B6=E4=BA=BA:* Andy Bierman [mailto:andy@yumaworks.com] > *=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4:* 2019=E5=B9=B49=E6=9C=8810=E6=97= =A5 1:14 > *=E6=94=B6=E4=BB=B6=E4=BA=BA:* Rob Wilton (rwilton) > *=E6=8A=84=E9=80=81:* Fengchong (frank) ; net= mod@ietf.org; > Yangang > *=E4=B8=BB=E9=A2=98:* Re: [netmod] Please clarify implementation about = =E2=80=98when=E2=80=99 > > > > Hi, > > > > None of the operations that accept or return datastore contents expose th= e > datastore objects > > in the RPC parameters. They are always anyxml or anydata. This means tha= t > > there are no descendant data nodes defined at all according to the RPC > operation > > and therefore the constraints on those nodes do not exist in the RPC > operation either. > > > > > > > > On Mon, Sep 9, 2019 at 6:41 AM Rob Wilton (rwilton) > wrote: > > Hi Frank, > > > > My interpretation of what the expected behaviour is as follows. > > > > For =E2=80=9Cscene 1=E2=80=9D, the config change is accepted because the = result of the > config datastore after the edit-config has been applied is valid. > > > > For =E2=80=9Cscene 2=E2=80=9D, the config change is rejected because the = result of the > config datastore after the edit-config has been applied is invalid. > > > > My interpretation is that the block of text in 8.3.1 payload parsing is > primary intended to refer to RFC input. E.g. if the RPC was defined > something like below, then the =E2=80=98when=E2=80=99 rule in 8.3.1 would= enforce that a > zip-code can only be provided if the country is the USA. > > > > rpc rock-the-house { > > input { > > leaf country { > > type string; > > } > > leaf zip-code { > > when =E2=80=9C../country =3D =E2=80=98usa=E2=80=99=E2=80=9D; > > type string; > > } > > } > > } > > > > Thanks, > > Rob > > > > > > > > *From:* netmod *On Behalf Of *Fengchong (frank) > *Sent:* 06 September 2019 08:19 > *To:* netmod@ietf.org > *Cc:* Yangang > *Subject:* [netmod] Please clarify implementation about =E2=80=98when=E2= =80=99 > > > > Hi all, > > > > In RFC7950 secton 8, several description about when=EF=BC=9A > In section 8.2 . > Configuration Data Modifications > > o If a request modifies a configuration data node such that any > > node's "when" expression becomes false, then the node in the data > > tree with the "when" expression is deleted by the server. > In 8.3.1 . Payload > Parsing > > o If data for a node tagged with "when" is present and the "when" > > condition evaluates to "false", the server MUST reply with an > > "unknown-element" in the . > > In 8.3.2 . NETCONF > Processing > > Modification requests for nodes tagged with "when", and the "when" > > condition evaluates to "false". In this case, the server MUST > > reply with an "unknown-element" in the . > > > > YANG module=EF=BC=9A > > module foo { > > namespace =E2=80=9Chttp://foo.com=E2=80=9D; > > prefix =E2=80=9Cfoo=E2=80=9D; > > Leaf a {=E2=80=A6} > > Leaf b { > > When =E2=80=9Ca =3D 10=E2=80=9D; > > } > > } > Scene 1: > > The first edit-config request: > > > > > > > > > > > > 3 > > > > > > This request will set a =3D 3. > > > > The second request: > > > > > > > > > > > > 10 > > 5 > > > > > > > > According 8.3.1, in rpc payload parsing phase, the a=E2=80=99s value in c= andidate > datastore is 3,so leaf b=E2=80=99s when condition is evaluated to false, = server > will report =E2=80=98unknown-element=E2=80=99 error. > > Is it expected by user? > Scene 2: > > The first edit-config request: > > > > > > > > > > > > 10 > > > > > > This request will set a =3D 10. > > > > The second request: > > > > > > > > > > > > 3 > > 5 > > > > > > According 8.3.1, in rpc payload parsing phase, the a=E2=80=99s value in c= andidate > datastore is 10, so leaf b=E2=80=99s when condition is evaluated to true,= server > will accept this request in payload parsing phase. > > > > In edit-config request processing phase, if leaf a=E2=80=99s modification= is > processed firstly, the a=E2=80=99s value will be changed to 3, so the b= =E2=80=99s when > condition will be false, when server process b=E2=80=99s modification, b = will be > treated as unknown-element, the edit-config request will fail. > > If leaf b=E2=80=99s modification is processed firstly, server will accept= this > modification ,because b=E2=80=99s when condition is true, and when server= process > a=E2=80=99s modification , this modification will be accepted, and b=E2= =80=99s when > condition will be evaluated to false, leaf b will be deleted automaticall= y, > the edit-config request will be OK. > > > > How server should process this situation? > > > > _______________________________________________ > netmod mailing list > netmod@ietf.org > https://www.ietf.org/mailman/listinfo/netmod > > --000000000000a302e6059229d21e Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hi,

I see you are aski= ng about when the server removes data nodes with false when-stmts.
Our server would accept scene 1 and reject scene 2.
The when-st= mts are evaluated against the desired datastore (same as leafref validation= )
after all the modifications are considered.

Andy


On Mon, Sep 9, 2019 at 7:10 PM Fengchong (fr= ank) <fr= ank.fengchong@huawei.com> wrote:

Hi andy,

=C2=A0=

You only talk about the con= straints on rpc operation=E2=80=99s parameter?

=C2=A0=

Do you have any opinion abo= ut my question?

=C2=A0=

=E5=8D=8E=E4=B8= =BA=E6=8A=80=E6=9C=AF=E6=9C=89=E9=99=90=E5=85=AC=E5=8F=B8 Huawei Technologies Co., Ltd.

=

=E4=B8=AA=E4=BA= =BA=E7=AD=BE=E5=90=8D=EF=BC=9A=E5=86=AF=E5=86=B2
=E6=89=8B=E3=80=80=E3=80=80=E6=9C=BA=EF=BC=9A13= 776612983
=E7=94=B5=E5=AD=90=E9=82=AE=E4=BB=B6=EF=BC=9Afrank.fengcho= ng@huawei.com
=E5=85=AC=E5=8F=B8=E7=BD=91=E5=9D=80=EF=BC=9Awww.huawei.com=

= =EF=BB=BF =E6=9C=AC=E9=82=AE=E4=BB= =B6=E5=8F=8A=E5=85=B6=E9=99=84=E4=BB=B6=E5=90=AB=E6=9C=89=E5=8D=8E=E4=B8=BA= =E5=85=AC=E5=8F=B8=E7=9A=84=E4=BF=9D=E5=AF=86=E4=BF=A1=E6=81=AF=EF=BC=8C=E4= =BB=85=E9=99=90=E4=BA=8E=E5=8F=91=E9=80=81=E7=BB=99=E4=B8=8A=E9=9D=A2=E5=9C= =B0=E5=9D=80=E4=B8=AD=E5=88=97=E5=87=BA=E7=9A=84=E4=B8=AA=E4=BA=BA=E6=88=96= =E7=BE=A4=E7=BB=84=E3=80=82=E7=A6=81
=E6=AD=A2=E4=BB=BB=E4=BD= =95=E5=85=B6=E4=BB=96=E4=BA=BA=E4=BB=A5=E4=BB=BB=E4=BD=95=E5=BD=A2=E5=BC=8F= =E4=BD=BF=E7=94=A8=EF=BC=88=E5=8C=85=E6=8B=AC=E4=BD=86=E4=B8=8D=E9=99=90=E4= =BA=8E=E5=85=A8=E9=83=A8=E6=88=96=E9=83=A8=E5=88=86=E5=9C=B0=E6=B3=84=E9=9C= =B2=E3=80=81=E5=A4=8D=E5=88=B6=E3=80=81=E6=88=96=E6=95=A3=E5=8F=91=EF=BC=89= =E6=9C=AC=E9=82=AE=E4=BB=B6=E4=B8=AD
=E7=9A=84=E4=BF=A1=E6=81= =AF=E3=80=82=E5=A6=82=E6=9E=9C=E6=82=A8=E9=94=99=E6=94=B6=E4=BA=86=E6=9C=AC= =E9=82=AE=E4=BB=B6=EF=BC=8C=E8=AF=B7=E6=82=A8=E7=AB=8B=E5=8D=B3=E7=94=B5=E8= =AF=9D=E6=88=96=E9=82=AE=E4=BB=B6=E9=80=9A=E7=9F=A5=E5=8F=91=E4=BB=B6=E4=BA= =BA=E5=B9=B6=E5=88=A0=E9=99=A4=E6=9C=AC=E9=82=AE=E4=BB=B6=EF=BC=81
This e-mail and its attachments contain confidential information from HUAWE= I, which
is intended only for the person or entity whose address is listed above. An= y use of the
information contained herein in any way (including, but not limited to, tot= al or partial
disclosure, reproduction, or dissemination) by persons other than the inten= ded
recipient(s) is prohibited. If you receive this e-mail in error, please not= ify the sender by
phone or email immediately and delete it!

=C2=A0=

=E5=8F=91=E4=BB=B6=E4=BA=BA: Andy Bie= rman [mailto:andy@y= umaworks.com]
=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4: 2019=E5=B9=B49=E6=9C=8810=E6=97=A5 1:14
=E6=94=B6=E4=BB=B6=E4=BA=BA: Rob Wilton (rwilton) <rwilton@cisco.com>
=E6=8A=84=E9=80=81: Fengchong (frank) <frank.fengchong@huawei.com>; netmod@ietf.org; Yangang <yangang@huawei.com>=
=E4=B8=BB=E9=A2=98: Re: [netmod] Please clarify implementation about =E2=80=98when=E2=80=99

=C2=A0

Hi,

=C2=A0

None of the operations that acc= ept or return datastore contents expose the datastore objects=

in the RPC parameters.=C2=A0 Th= ey are always anyxml or anydata. This means that

there are no descendant data no= des defined at all according to the RPC operation

and therefore the constraints o= n those nodes do not exist in the RPC operation either.

=C2=A0

=C2=A0

=C2=A0

On Mon, Sep 9, 2019 at 6:41 AM = Rob Wilton (rwilton) <rwilton@cisco.com> wrote:

Hi Fra= nk,

=C2=A0=

My int= erpretation of what the expected behaviour is as follows.

=C2=A0=

For = =E2=80=9Cscene 1=E2=80=9D, the config change is accepted because the result= of the config datastore after the edit-config has been applied is valid.

=C2=A0=

For = =E2=80=9Cscene 2=E2=80=9D, the config change is rejected because the result= of the config datastore after the edit-config has been applied is invalid.=

=C2=A0=

My int= erpretation is that the block of text in 8.3.1 payload parsing is primary i= ntended to refer to RFC input.=C2=A0 E.g. if the RPC was defined something like below, then the =E2=80=98when=E2=80=99 rule in 8.3.= 1 would enforce that a zip-code can only be provided if the country is the = USA.

=C2=A0=

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0 rpc rock-the-house {

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0 input {

=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0leaf country {=

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 type string;

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0 }

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0 leaf zip-code {<= /u>

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 when =E2=80=9C../country =3D =E2=80= =98usa=E2=80=99=E2=80=9D;<= /p>

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 type string;

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0 }

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0 }

=C2=A0 =C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0}

=C2=A0=

Thanks= ,

Rob

=C2=A0=

=C2=A0=

=C2=A0=

Fro= m: netmod <netmod-bounces@iet= f.org> On Behalf Of Fengchong (frank)
Sent: 06 September 2019 08:19
To: netmod@ietf= .org
Cc: Yangang <yangang@huawei.com>
Subject: [netmod] Please clarify implementation about =E2=80=98when= =E2=80=99

=C2=A0

Hi all,

=C2=A0

In RFC7950 secton 8, several de= scription about when=EF=BC=9A

In section 8.2.=C2=A0 Co= nfiguration Data Modifications

=C2=A0=C2=A0 o=C2=A0 If a request modifies a configuration data node = such that any

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 node's "when" expression= becomes false, then the node in the data

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 tree with the "when" express= ion is deleted by the server.

In 8.3.1.=C2=A0 Payload Parsing

=C2=A0=C2=A0=
 o=C2=A0 If data for a node tagged with "when" is present and the=
 "when"
=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0 condition evaluates to "false", the server MUS=
T reply with an
=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0 "unknown-element" <error-tag> in the <=
;rpc-error>.

In 8.3.2.=C2=A0 NETCONF <edit-config> Processing

Modification=
 requests for nodes tagged with "when", and the "when"<=
/span>
=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0 condition evaluates to "false".=C2=A0 In this =
case, the server MUST

=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0 reply with an "unknown-element" <error-tag&=
gt; in the <rpc-error>.


=C2=A0


YANG module=EF=BC=9A


module foo {


=C2=A0=C2=A0 namespace =E2=80=
=9Chttp://foo.com=E2=80=9D=
;


=C2=A0=C2=A0 prefix =E2=80=9Cfo=
o=E2=80=9D;



Leaf a {=E2=80=A6}<=
u>



Leaf b {



=C2=A0 When =E2=80=9Ca =3D 10=E2=80=9D;



}


}


Scene 1: 


The first edit-config request:<=
/span>


<edit-config>


=C2=A0=C2=A0 <target>


=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
<candidate/>


=C2=A0=C2=A0 </target>



=C2=A0=C2=A0=C2=A0<config>=
;


=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
<a xmlns=3D =E2=80=9Chttp:/=
/foo.com=E2=80=9D>3</a><=
/u>


=C2=A0=C2=A0 </config>


</edit-config>


This request will set a =3D 3.<=
/span>


=C2=A0


The second request:


<edit-config>


=C2=A0=C2=A0 <target>


=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
<candidate/>


=C2=A0=C2=A0 </target>



=C2=A0=C2=A0=C2=A0<config>=
;


=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
<a xmlns=3D =E2=80=9Chttp:/=
/foo.com=E2=80=9D>10</a>=



=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
<b xmlns=3D =E2=80=9Chttp:/=
/foo.com=E2=80=9D>5</b><=
/u>


=C2=A0=C2=A0 </config>


</edit-config>


=C2=A0


Accord=
ing 8.3.1, in rpc payload parsing phase, the a=E2=80=99s value in candidate=
 datastore is 3,so leaf b=E2=80=99s when condition is evaluated to false,
 server will report =E2=80=98unknown-element=E2=80=99 error.


Is it =
expected by user?


Scene 2:=



The first edit-config request:<=
/span>


<edit-config>


=C2=A0=C2=A0 <target>


=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
<candidate/>


=C2=A0=C2=A0 </target>



=C2=A0=C2=A0=C2=A0<config>=
;


=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
<a xmlns=3D =E2=80=9Chttp:/=
/foo.com=E2=80=9D>10</a>=



=C2=A0=C2=A0 </config>


</edit-config>


This request will set a =3D 10.=



=C2=A0


The second request:


<edit-config>


=C2=A0=C2=A0 <target>


=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
<candidate/>


=C2=A0=C2=A0 </target>



=C2=A0=C2=A0=C2=A0<config>=
;


=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
<a xmlns=3D =E2=80=9Chttp:/=
/foo.com=E2=80=9D>3</a><=
/u>


=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
<b xmlns=3D =E2=80=9Chttp:/=
/foo.com=E2=80=9D>5</b><=
/u>


=C2=A0=C2=A0 </config>


</edit-config>


Accord=
ing 8.3.1, in rpc payload parsing phase, the a=E2=80=99s value in candidate=
 datastore is 10, so leaf b=E2=80=99s when condition is evaluated to
 true, server will accept this request in payload parsing phase. 


=C2=A0=



In edi=
t-config request processing phase, if leaf a=E2=80=99s modification is proc=
essed firstly, the a=E2=80=99s value will be changed to 3, so the b=E2=80=
=99s
 when condition will be false, when server process b=E2=80=99s modification=
, b will be treated as unknown-element, the edit-config request will fail.



If lea=
f b=E2=80=99s modification is processed firstly, server will accept this mo=
dification ,because b=E2=80=99s when condition is true, and when server
 process a=E2=80=99s modification , this modification will be accepted, and=
 b=E2=80=99s when condition will be evaluated to false, leaf b will be dele=
ted automatically, the edit-config request will be OK.


=C2=A0=



How se=
rver should process this situation?


=C2=A0

_______________________________= ________________
netmod mailing list
netmod@ietf.org = https://www.ietf.org/mailman/listinfo/netmod

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with mapi id 14.03.0439.000; Tue, 10 Sep 2019 10:50:01 +0800 From: "Fengchong (frank)" To: Andy Bierman CC: "Rob Wilton (rwilton)" , "netmod@ietf.org" , Yangang Thread-Topic: =?utf-8?B?W25ldG1vZF0gUGxlYXNlIGNsYXJpZnkgaW1wbGVtZW50YXRpb24gYWJvdXQg?= =?utf-8?B?4oCYd2hlbuKAmQ==?= Thread-Index: AQHVZxRY9YCq6AlKlkifU9HZTydEwqcjD5kAgAEZNBD//4T/gIAAhv8A Date: Tue, 10 Sep 2019 02:50:00 +0000 Message-ID: <5756FB984666AD4BB8E1D63E2E3AA3D001F2CBF8@dggemm513-mbx.china.huawei.com> References: <5756FB984666AD4BB8E1D63E2E3AA3D001F20F2C@dggemm513-mbs.china.huawei.com> <5756FB984666AD4BB8E1D63E2E3AA3D001F2CBA8@dggemm513-mbx.china.huawei.com> In-Reply-To: Accept-Language: en-US Content-Language: zh-CN X-MS-Has-Attach: yes X-MS-TNEF-Correlator: x-originating-ip: [10.134.40.226] Content-Type: multipart/related; boundary="_004_5756FB984666AD4BB8E1D63E2E3AA3D001F2CBF8dggemm513mbxchi_"; type="multipart/alternative" MIME-Version: 1.0 X-CFilter-Loop: Reflected Archived-At: Subject: [netmod] 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APjAAAXeUQKkI0mPREtLl7dCAo7yGM8qzcjgw5YLpFuBNiFp7Ql2oWRa WJNGJDo3t9uSkUYIk8fdxODro1LyH5dmbbNeYe0SEw== X-Google-Smtp-Source: APXvYqxytJlSUatBnTRNSeAXkqTX66cyCdAlqXFMYyVDdsGqUJUK4btjbMcgJ84wGL3XYX/3yiLfmXF3zISLo/BUmAk= X-Received: by 2002:a2e:990d:: with SMTP id v13mr11199297lji.146.1568084200668; Mon, 09 Sep 2019 19:56:40 -0700 (PDT) MIME-Version: 1.0 References: <5756FB984666AD4BB8E1D63E2E3AA3D001F20F2C@dggemm513-mbs.china.huawei.com> <5756FB984666AD4BB8E1D63E2E3AA3D001F2CBA8@dggemm513-mbx.china.huawei.com> <5756FB984666AD4BB8E1D63E2E3AA3D001F2CBE4@dggemm513-mbx.china.huawei.com> In-Reply-To: <5756FB984666AD4BB8E1D63E2E3AA3D001F2CBE4@dggemm513-mbx.china.huawei.com> From: Andy Bierman Date: Mon, 9 Sep 2019 19:56:29 -0700 Message-ID: To: "Fengchong (frank)" Cc: "Rob Wilton (rwilton)" , "netmod@ietf.org" , Yangang Content-Type: multipart/related; boundary="000000000000c2672b05922a0d83" Archived-At: Subject: Re: [netmod] =?utf-8?q?Please_clarify_implementation_about_=E2=80=98?= =?utf-8?b?d2hlbuKAmQ==?= X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 10 Sep 2019 02:56:47 -0000 --000000000000c2672b05922a0d83 Content-Type: multipart/alternative; boundary="000000000000c2672a05922a0d82" --000000000000c2672a05922a0d82 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Mon, Sep 9, 2019 at 7:40 PM Fengchong (frank) wrote: > Andy, > > Whether all constraints on content in parameter will not be > evaluated in payload parsing phase, for example, a leaf=E2=80=99s value e= xceed > range? > > Netconf server should treat it as a block data? > > > Field validation and datastore validation are 2 different things. when-stmt processing is neither. It is by far the hardest part of an automated server to get right. > Another question: > > > > In edit-config processing phase, whether constraints on content in > parameter needs be evaluated? > > If yes, when configuration modification cause when condition is evaluate= d > to false, the node tagged when will be automatically deleted by system. > > Then, in scene 2, whether different result would occur according differen= t > process order? > > Since the parameter is anyxml, the YANG constraints defined on datastore contents are not enforced as part of RPC input validation. It would be nice if NETCONF defined behavior for providing data that will get deleted immediately by the server. We have a CLI parameter for this since some vendors want to treat this as an error and other just silently delete nodes. Note that when-stmt can silently delete existing nodes not included in the edit. (Lada does not agree this is how it should work, so we need yang-next to decide. Maybe NETCONF needs a --force parameter for this purpose.) Andy > ------------------------------ > > =E5=8D=8E=E4=B8=BA=E6=8A=80=E6=9C=AF=E6=9C=89=E9=99=90=E5=85=AC=E5=8F=B8 = Huawei Technologies Co., Ltd. > > [image: Company_logo] > > =E4=B8=AA=E4=BA=BA=E7=AD=BE=E5=90=8D=EF=BC=9A=E5=86=AF=E5=86=B2 > =E6=89=8B =E6=9C=BA=EF=BC=9A13776612983 > =E7=94=B5=E5=AD=90=E9=82=AE=E4=BB=B6=EF=BC=9Afrank.fengchong@huawei.com > =E5=85=AC=E5=8F=B8=E7=BD=91=E5=9D=80=EF=BC=9Awww.huawei.com > ------------------------------ > > =EF=BB=BF =E6=9C=AC=E9=82=AE=E4=BB=B6=E5=8F=8A=E5=85=B6=E9=99=84=E4=BB=B6= =E5=90=AB=E6=9C=89=E5=8D=8E=E4=B8=BA=E5=85=AC=E5=8F=B8=E7=9A=84=E4=BF=9D=E5= =AF=86=E4=BF=A1=E6=81=AF=EF=BC=8C=E4=BB=85=E9=99=90=E4=BA=8E=E5=8F=91=E9=80= =81=E7=BB=99=E4=B8=8A=E9=9D=A2=E5=9C=B0=E5=9D=80=E4=B8=AD=E5=88=97=E5=87=BA= =E7=9A=84=E4=B8=AA=E4=BA=BA=E6=88=96=E7=BE=A4=E7=BB=84=E3=80=82=E7=A6=81 > =E6=AD=A2=E4=BB=BB=E4=BD=95=E5=85=B6=E4=BB=96=E4=BA=BA=E4=BB=A5=E4=BB=BB= =E4=BD=95=E5=BD=A2=E5=BC=8F=E4=BD=BF=E7=94=A8=EF=BC=88=E5=8C=85=E6=8B=AC=E4= =BD=86=E4=B8=8D=E9=99=90=E4=BA=8E=E5=85=A8=E9=83=A8=E6=88=96=E9=83=A8=E5=88= =86=E5=9C=B0=E6=B3=84=E9=9C=B2=E3=80=81=E5=A4=8D=E5=88=B6=E3=80=81=E6=88=96= =E6=95=A3=E5=8F=91=EF=BC=89=E6=9C=AC=E9=82=AE=E4=BB=B6=E4=B8=AD > =E7=9A=84=E4=BF=A1=E6=81=AF=E3=80=82=E5=A6=82=E6=9E=9C=E6=82=A8=E9=94=99= =E6=94=B6=E4=BA=86=E6=9C=AC=E9=82=AE=E4=BB=B6=EF=BC=8C=E8=AF=B7=E6=82=A8=E7= =AB=8B=E5=8D=B3=E7=94=B5=E8=AF=9D=E6=88=96=E9=82=AE=E4=BB=B6=E9=80=9A=E7=9F= =A5=E5=8F=91=E4=BB=B6=E4=BA=BA=E5=B9=B6=E5=88=A0=E9=99=A4=E6=9C=AC=E9=82=AE= =E4=BB=B6=EF=BC=81 > This e-mail and its attachments contain confidential information from > HUAWEI, which > is intended only for the person or entity whose address is listed above. > Any use of the > information contained herein in any way (including, but not limited to, > total or partial > disclosure, reproduction, or dissemination) by persons other than the > intended > recipient(s) is prohibited. If you receive this e-mail in error, please > notify the sender by > phone or email immediately and delete it! > > > > *=E5=8F=91=E4=BB=B6=E4=BA=BA:* Andy Bierman [mailto:andy@yumaworks.com] > *=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4:* 2019=E5=B9=B49=E6=9C=8810=E6=97= =A5 10:19 > *=E6=94=B6=E4=BB=B6=E4=BA=BA:* Fengchong (frank) > *=E6=8A=84=E9=80=81:* Rob Wilton (rwilton) ; netmod@ie= tf.org; Yangang < > yangang@huawei.com> > *=E4=B8=BB=E9=A2=98:* Re: [netmod] Please clarify implementation about = =E2=80=98when=E2=80=99 > > > > > > > > On Mon, Sep 9, 2019 at 7:10 PM Fengchong (frank) < > frank.fengchong@huawei.com> wrote: > > Hi andy, > > > > You only talk about the constraints on rpc operation=E2=80=99s parameter? > > > > Do you have any opinion about my question? > > > > 8.3.1 does not apply to leaf 'b'. > > The RPC parameter is called 'config'. > > It has no when-stmts to evaluate. > > Rob is correct. > > His example shows what 8.3.1 would cover. > > > > Andy > > > > > > > ------------------------------ > > =E5=8D=8E=E4=B8=BA=E6=8A=80=E6=9C=AF=E6=9C=89=E9=99=90=E5=85=AC=E5=8F=B8 = Huawei Technologies Co., Ltd. > > [image: Company_logo] > > =E4=B8=AA=E4=BA=BA=E7=AD=BE=E5=90=8D=EF=BC=9A=E5=86=AF=E5=86=B2 > =E6=89=8B =E6=9C=BA=EF=BC=9A13776612983 > =E7=94=B5=E5=AD=90=E9=82=AE=E4=BB=B6=EF=BC=9Afrank.fengchong@huawei.com > =E5=85=AC=E5=8F=B8=E7=BD=91=E5=9D=80=EF=BC=9Awww.huawei.com > ------------------------------ > > =EF=BB=BF =E6=9C=AC=E9=82=AE=E4=BB=B6=E5=8F=8A=E5=85=B6=E9=99=84=E4=BB=B6= =E5=90=AB=E6=9C=89=E5=8D=8E=E4=B8=BA=E5=85=AC=E5=8F=B8=E7=9A=84=E4=BF=9D=E5= =AF=86=E4=BF=A1=E6=81=AF=EF=BC=8C=E4=BB=85=E9=99=90=E4=BA=8E=E5=8F=91=E9=80= =81=E7=BB=99=E4=B8=8A=E9=9D=A2=E5=9C=B0=E5=9D=80=E4=B8=AD=E5=88=97=E5=87=BA= =E7=9A=84=E4=B8=AA=E4=BA=BA=E6=88=96=E7=BE=A4=E7=BB=84=E3=80=82=E7=A6=81 > =E6=AD=A2=E4=BB=BB=E4=BD=95=E5=85=B6=E4=BB=96=E4=BA=BA=E4=BB=A5=E4=BB=BB= =E4=BD=95=E5=BD=A2=E5=BC=8F=E4=BD=BF=E7=94=A8=EF=BC=88=E5=8C=85=E6=8B=AC=E4= =BD=86=E4=B8=8D=E9=99=90=E4=BA=8E=E5=85=A8=E9=83=A8=E6=88=96=E9=83=A8=E5=88= =86=E5=9C=B0=E6=B3=84=E9=9C=B2=E3=80=81=E5=A4=8D=E5=88=B6=E3=80=81=E6=88=96= =E6=95=A3=E5=8F=91=EF=BC=89=E6=9C=AC=E9=82=AE=E4=BB=B6=E4=B8=AD > =E7=9A=84=E4=BF=A1=E6=81=AF=E3=80=82=E5=A6=82=E6=9E=9C=E6=82=A8=E9=94=99= =E6=94=B6=E4=BA=86=E6=9C=AC=E9=82=AE=E4=BB=B6=EF=BC=8C=E8=AF=B7=E6=82=A8=E7= =AB=8B=E5=8D=B3=E7=94=B5=E8=AF=9D=E6=88=96=E9=82=AE=E4=BB=B6=E9=80=9A=E7=9F= =A5=E5=8F=91=E4=BB=B6=E4=BA=BA=E5=B9=B6=E5=88=A0=E9=99=A4=E6=9C=AC=E9=82=AE= =E4=BB=B6=EF=BC=81 > This e-mail and its attachments contain confidential information from > HUAWEI, which > is intended only for the person or entity whose address is listed above. > Any use of the > information contained herein in any way (including, but not limited to, > total or partial > disclosure, reproduction, or dissemination) by persons other than the > intended > recipient(s) is prohibited. If you receive this e-mail in error, please > notify the sender by > phone or email immediately and delete it! > > > > *=E5=8F=91=E4=BB=B6=E4=BA=BA:* Andy Bierman [mailto:andy@yumaworks.com] > *=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4:* 2019=E5=B9=B49=E6=9C=8810=E6=97= =A5 1:14 > *=E6=94=B6=E4=BB=B6=E4=BA=BA:* Rob Wilton (rwilton) > *=E6=8A=84=E9=80=81:* Fengchong (frank) ; net= mod@ietf.org; > Yangang > *=E4=B8=BB=E9=A2=98:* Re: [netmod] Please clarify implementation about = =E2=80=98when=E2=80=99 > > > > Hi, > > > > None of the operations that accept or return datastore contents expose th= e > datastore objects > > in the RPC parameters. They are always anyxml or anydata. This means tha= t > > there are no descendant data nodes defined at all according to the RPC > operation > > and therefore the constraints on those nodes do not exist in the RPC > operation either. > > > > > > > > On Mon, Sep 9, 2019 at 6:41 AM Rob Wilton (rwilton) > wrote: > > Hi Frank, > > > > My interpretation of what the expected behaviour is as follows. > > > > For =E2=80=9Cscene 1=E2=80=9D, the config change is accepted because the = result of the > config datastore after the edit-config has been applied is valid. > > > > For =E2=80=9Cscene 2=E2=80=9D, the config change is rejected because the = result of the > config datastore after the edit-config has been applied is invalid. > > > > My interpretation is that the block of text in 8.3.1 payload parsing is > primary intended to refer to RFC input. E.g. if the RPC was defined > something like below, then the =E2=80=98when=E2=80=99 rule in 8.3.1 would= enforce that a > zip-code can only be provided if the country is the USA. > > > > rpc rock-the-house { > > input { > > leaf country { > > type string; > > } > > leaf zip-code { > > when =E2=80=9C../country =3D =E2=80=98usa=E2=80=99=E2=80=9D; > > type string; > > } > > } > > } > > > > Thanks, > > Rob > > > > > > > > *From:* netmod *On Behalf Of *Fengchong (frank) > *Sent:* 06 September 2019 08:19 > *To:* netmod@ietf.org > *Cc:* Yangang > *Subject:* [netmod] Please clarify implementation about =E2=80=98when=E2= =80=99 > > > > Hi all, > > > > In RFC7950 secton 8, several description about when=EF=BC=9A > In section 8.2 . > Configuration Data Modifications > > o If a request modifies a configuration data node such that any > > node's "when" expression becomes false, then the node in the data > > tree with the "when" expression is deleted by the server. > In 8.3.1 . Payload > Parsing > > o If data for a node tagged with "when" is present and the "when" > > condition evaluates to "false", the server MUST reply with an > > "unknown-element" in the . > > In 8.3.2 . NETCONF > Processing > > Modification requests for nodes tagged with "when", and the "when" > > condition evaluates to "false". In this case, the server MUST > > reply with an "unknown-element" in the . > > > > YANG module=EF=BC=9A > > module foo { > > namespace =E2=80=9Chttp://foo.com=E2=80=9D; > > prefix =E2=80=9Cfoo=E2=80=9D; > > Leaf a {=E2=80=A6} > > Leaf b { > > When =E2=80=9Ca =3D 10=E2=80=9D; > > } > > } > Scene 1: > > The first edit-config request: > > > > > > > > > > > > 3 > > > > > > This request will set a =3D 3. > > > > The second request: > > > > > > > > > > > > 10 > > 5 > > > > > > > > According 8.3.1, in rpc payload parsing phase, the a=E2=80=99s value in c= andidate > datastore is 3,so leaf b=E2=80=99s when condition is evaluated to false, = server > will report =E2=80=98unknown-element=E2=80=99 error. > > Is it expected by user? > Scene 2: > > The first edit-config request: > > > > > > > > > > > > 10 > > > > > > This request will set a =3D 10. > > > > The second request: > > > > > > > > > > > > 3 > > 5 > > > > > > According 8.3.1, in rpc payload parsing phase, the a=E2=80=99s value in c= andidate > datastore is 10, so leaf b=E2=80=99s when condition is evaluated to true,= server > will accept this request in payload parsing phase. > > > > In edit-config request processing phase, if leaf a=E2=80=99s modification= is > processed firstly, the a=E2=80=99s value will be changed to 3, so the b= =E2=80=99s when > condition will be false, when server process b=E2=80=99s modification, b = will be > treated as unknown-element, the edit-config request will fail. > > If leaf b=E2=80=99s modification is processed firstly, server will accept= this > modification ,because b=E2=80=99s when condition is true, and when server= process > a=E2=80=99s modification , this modification will be accepted, and b=E2= =80=99s when > condition will be evaluated to false, leaf b will be deleted automaticall= y, > the edit-config request will be OK. > > > > How server should process this situation? > > > > _______________________________________________ > netmod mailing list > netmod@ietf.org > https://www.ietf.org/mailman/listinfo/netmod > > --000000000000c2672a05922a0d82 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable


=
On Mon, Sep 9, 2019 at 7:40 PM Fengch= ong (frank) <frank.fengcho= ng@huawei.com> wrote:

Andy,<= /p>

Whether all constraints on = content in <config> parameter will not be evaluated in payload parsin= g phase, for example, a leaf=E2=80=99s value exceed range?

Netconf server should treat= it as a block data?

=C2=A0


Field validation and datastore va= lidation are 2 different things.
when-stmt processing is neither.= It is by far the hardest part of an automated server to get right.
=C2=A0

Another question:=

=C2=A0=

In edit-config processing p= hase, whether constraints on content in <config> parameter needs be e= valuated?

If yes, when =C2=A0configur= ation modification cause when condition is evaluated to false, the node tag= ged when will be automatically deleted by system.

Then, in scene 2, whether d= ifferent result would occur according different process order?



Since the <config>= parameter is anyxml, the YANG constraints defined on datastore contents
are not enforced as part of RPC input validation.

It would be nice if NETCONF defined behavior for providing <conf= ig> data that will get deleted
immediately by the server.=C2= =A0 We have a CLI parameter for this since some vendors want to
t= reat this as an error and other just silently delete nodes.=C2=A0 Note that= when-stmt can silently
delete existing nodes not included in the= edit. (Lada does not agree this is how it should work,
so we nee= d yang-next to decide. Maybe NETCONF needs a --force parameter for this pur= pose.)


Andy


=C2=A0

=E5=8D=8E=E4=B8= =BA=E6=8A=80=E6=9C=AF=E6=9C=89=E9=99=90=E5=85=AC=E5=8F=B8 Huawei Technologies Co., Ltd.

= 3D"Company_logo"<= u>

=E4=B8=AA=E4=BA= =BA=E7=AD=BE=E5=90=8D=EF=BC=9A=E5=86=AF=E5=86=B2
=E6=89=8B=E3=80=80=E3=80=80=E6=9C=BA=EF=BC=9A13= 776612983
=E7=94=B5=E5=AD=90=E9=82=AE=E4=BB=B6=EF=BC=9Afrank.fengcho= ng@huawei.com
=E5=85=AC=E5=8F=B8=E7=BD=91=E5=9D=80=EF=BC=9Awww.huawei.com=

= =EF=BB=BF =E6=9C=AC=E9=82=AE=E4=BB= =B6=E5=8F=8A=E5=85=B6=E9=99=84=E4=BB=B6=E5=90=AB=E6=9C=89=E5=8D=8E=E4=B8=BA= =E5=85=AC=E5=8F=B8=E7=9A=84=E4=BF=9D=E5=AF=86=E4=BF=A1=E6=81=AF=EF=BC=8C=E4= =BB=85=E9=99=90=E4=BA=8E=E5=8F=91=E9=80=81=E7=BB=99=E4=B8=8A=E9=9D=A2=E5=9C= =B0=E5=9D=80=E4=B8=AD=E5=88=97=E5=87=BA=E7=9A=84=E4=B8=AA=E4=BA=BA=E6=88=96= =E7=BE=A4=E7=BB=84=E3=80=82=E7=A6=81
=E6=AD=A2=E4=BB=BB=E4=BD= =95=E5=85=B6=E4=BB=96=E4=BA=BA=E4=BB=A5=E4=BB=BB=E4=BD=95=E5=BD=A2=E5=BC=8F= =E4=BD=BF=E7=94=A8=EF=BC=88=E5=8C=85=E6=8B=AC=E4=BD=86=E4=B8=8D=E9=99=90=E4= =BA=8E=E5=85=A8=E9=83=A8=E6=88=96=E9=83=A8=E5=88=86=E5=9C=B0=E6=B3=84=E9=9C= =B2=E3=80=81=E5=A4=8D=E5=88=B6=E3=80=81=E6=88=96=E6=95=A3=E5=8F=91=EF=BC=89= =E6=9C=AC=E9=82=AE=E4=BB=B6=E4=B8=AD
=E7=9A=84=E4=BF=A1=E6=81= =AF=E3=80=82=E5=A6=82=E6=9E=9C=E6=82=A8=E9=94=99=E6=94=B6=E4=BA=86=E6=9C=AC= =E9=82=AE=E4=BB=B6=EF=BC=8C=E8=AF=B7=E6=82=A8=E7=AB=8B=E5=8D=B3=E7=94=B5=E8= =AF=9D=E6=88=96=E9=82=AE=E4=BB=B6=E9=80=9A=E7=9F=A5=E5=8F=91=E4=BB=B6=E4=BA= =BA=E5=B9=B6=E5=88=A0=E9=99=A4=E6=9C=AC=E9=82=AE=E4=BB=B6=EF=BC=81
This e-mail and its attachments contain confidential information from HUAWE= I, which
is intended only for the person or entity whose address is listed above. An= y use of the
information contained herein in any way (including, but not limited to, tot= al or partial
disclosure, reproduction, or dissemination) by persons other than the inten= ded
recipient(s) is prohibited. If you receive this e-mail in error, please not= ify the sender by
phone or email immediately and delete it!

=C2=A0=

=E5=8F=91=E4=BB=B6=E4=BA=BA: Andy Bie= rman [mailto:andy@y= umaworks.com]
=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4: 2019=E5=B9=B49=E6=9C=8810=E6=97=A5 10:19
=E6=94=B6=E4=BB=B6=E4=BA=BA: Fengchong (frank) <frank.fengchong@huawei.com>
=E6=8A=84=E9=80=81: Rob Wilton (rwilton) <rwilton@cisco.com>; netmod@ietf.org; Yangang <yangang@huawei.com>
=E4=B8=BB=E9=A2=98: Re: [netmod] Please clarify implementation about =E2=80=98when=E2=80=99

=C2=A0

=C2=A0

=C2=A0

On Mon, Sep 9, 2019 at 7:10 PM = Fengchong (frank) <frank.fengchong@huawei.com> wrote:<= /p>

Hi andy,

=C2=A0

You only talk about the con= straints on rpc operation=E2=80=99s parameter?<= u>

=C2=A0

Do you have any opinion abo= ut my question?

=C2=A0

8.3.1 does not apply to leaf &#= 39;b'.

The RPC parameter is called = 9;config'.

It has no when-stmts to evaluat= e.

Rob is correct.

His example shows what 8.3.1 wo= uld cover.

=C2=A0

Andy

=C2=A0

=C2=A0

=C2=A0

=E5=8D=8E=E4=B8= =BA=E6=8A=80=E6=9C=AF=E6=9C=89=E9=99=90=E5=85=AC=E5=8F=B8 Huawei Technologies Co., Ltd.=

= 3D"Company_logo"

=E4=B8=AA=E4=BA= =BA=E7=AD=BE=E5=90=8D=EF=BC=9A=E5=86=AF=E5=86=B2
=E6=89=8B=E3=80=80=E3=80=80=E6=9C=BA=EF=BC=9A13= 776612983
=E7=94=B5=E5=AD=90=E9=82=AE=E4=BB=B6=EF=BC=9Afrank.fengcho= ng@huawei.com
=E5=85=AC=E5=8F=B8=E7=BD=91=E5=9D=80=EF=BC=9Awww.huawei.com=

= =EF=BB=BF =E6=9C=AC=E9=82=AE=E4=BB= =B6=E5=8F=8A=E5=85=B6=E9=99=84=E4=BB=B6=E5=90=AB=E6=9C=89=E5=8D=8E=E4=B8=BA= =E5=85=AC=E5=8F=B8=E7=9A=84=E4=BF=9D=E5=AF=86=E4=BF=A1=E6=81=AF=EF=BC=8C=E4= =BB=85=E9=99=90=E4=BA=8E=E5=8F=91=E9=80=81=E7=BB=99=E4=B8=8A=E9=9D=A2=E5=9C= =B0=E5=9D=80=E4=B8=AD=E5=88=97=E5=87=BA=E7=9A=84=E4=B8=AA=E4=BA=BA=E6=88=96= =E7=BE=A4=E7=BB=84=E3=80=82=E7=A6=81
=E6=AD=A2=E4=BB=BB=E4=BD= =95=E5=85=B6=E4=BB=96=E4=BA=BA=E4=BB=A5=E4=BB=BB=E4=BD=95=E5=BD=A2=E5=BC=8F= =E4=BD=BF=E7=94=A8=EF=BC=88=E5=8C=85=E6=8B=AC=E4=BD=86=E4=B8=8D=E9=99=90=E4= =BA=8E=E5=85=A8=E9=83=A8=E6=88=96=E9=83=A8=E5=88=86=E5=9C=B0=E6=B3=84=E9=9C= =B2=E3=80=81=E5=A4=8D=E5=88=B6=E3=80=81=E6=88=96=E6=95=A3=E5=8F=91=EF=BC=89= =E6=9C=AC=E9=82=AE=E4=BB=B6=E4=B8=AD
=E7=9A=84=E4=BF=A1=E6=81= =AF=E3=80=82=E5=A6=82=E6=9E=9C=E6=82=A8=E9=94=99=E6=94=B6=E4=BA=86=E6=9C=AC= =E9=82=AE=E4=BB=B6=EF=BC=8C=E8=AF=B7=E6=82=A8=E7=AB=8B=E5=8D=B3=E7=94=B5=E8= =AF=9D=E6=88=96=E9=82=AE=E4=BB=B6=E9=80=9A=E7=9F=A5=E5=8F=91=E4=BB=B6=E4=BA= =BA=E5=B9=B6=E5=88=A0=E9=99=A4=E6=9C=AC=E9=82=AE=E4=BB=B6=EF=BC=81
This e-mail and its attachments contain confidential information from HUAWE= I, which
is intended only for the person or entity whose address is listed above. An= y use of the
information contained herein in any way (including, but not limited to, tot= al or partial
disclosure, reproduction, or dissemination) by persons other than the inten= ded
recipient(s) is prohibited. If you receive this e-mail in error, please not= ify the sender by
phone or email immediately and delete it!

=C2=A0

=E5=8F=91=E4=BB=B6=E4=BA=BA: Andy Bierman [mailto:andy@yumaworks.com]
=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4: 2019=E5=B9=B49=E6=9C=8810=E6=97=A5 1:14
=E6=94=B6=E4=BB=B6=E4=BA=BA: Rob Wilton (rwilton) <rwilton@cisco.com>
=E6=8A=84=E9=80=81: Fengchong (frank) <frank.fengchong@huawei.com>; netmod@ietf.org; Y= angang <yangang@= huawei.com>
=E4=B8=BB=E9=A2=98: Re: [netmod] Please clarify implementation about =E2=80=98when=E2=80=99

=C2=A0

Hi,

=C2=A0

None of the operations that acc= ept or return datastore contents expose the datastore objects=

in the RPC parameters.=C2=A0 Th= ey are always anyxml or anydata. This means that

there are no descendant data no= des defined at all according to the RPC operation

and therefore the constraints o= n those nodes do not exist in the RPC operation either.

=C2=A0

=C2=A0

=C2=A0

On Mon, Sep 9, 2019 at 6:41 AM = Rob Wilton (rwilton) <rwilton@cisco.com> wrote:

Hi Fra= nk,

=C2=A0=

My int= erpretation of what the expected behaviour is as follows.

=C2=A0=

For = =E2=80=9Cscene 1=E2=80=9D, the config change is accepted because the result= of the config datastore after the edit-config has been applied is valid.

=C2=A0=

For = =E2=80=9Cscene 2=E2=80=9D, the config change is rejected because the result= of the config datastore after the edit-config has been applied is invalid.=

=C2=A0=

My int= erpretation is that the block of text in 8.3.1 payload parsing is primary i= ntended to refer to RFC input.=C2=A0 E.g. if the RPC was defined something like below, then the =E2=80=98when=E2=80=99 rule in 8.3.= 1 would enforce that a zip-code can only be provided if the country is the = USA.

=C2=A0=

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0 rpc rock-the-house {

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0 input {

=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0leaf country {=

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 type string;

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0 }

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0 leaf zip-code {<= /u>

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 when =E2=80=9C../country =3D =E2=80= =98usa=E2=80=99=E2=80=9D;<= /p>

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 type string;

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0 }

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0 }

=C2=A0 =C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0}

=C2=A0=

Thanks= ,

Rob

=C2=A0=

=C2=A0=

=C2=A0=

Fro= m: netmod <netmod-bounces@iet= f.org> On Behalf Of Fengchong (frank)
Sent: 06 September 2019 08:19
To: netmod@ietf= .org
Cc: Yangang <yangang@huawei.com>
Subject: [netmod] Please clarify implementation about =E2=80=98when= =E2=80=99

=C2=A0

Hi all,

=C2=A0

In RFC7950 secton 8, several de= scription about when=EF=BC=9A

In section 8.2.=C2=A0 Configuration Data Modi= fications

=C2=A0=C2=A0 o=C2=A0 If a request modifies a configuration data node = such that any

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 node's "when" expression= becomes false, then the node in the data

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 tree with the "when" express= ion is deleted by the server.

In 8.3.1.=C2=A0= Payload Parsing

=C2=A0=C2=A0=
 o=C2=A0 If data for a node tagged with "when" is present and the=
 "when"
=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0 condition evaluates to "false", the server MUS=
T reply with an
=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0 "unknown-element" <error-tag> in the <=
;rpc-error>.

In 8.3.2.= =C2=A0 NETCONF <edit-config> Processing

Modification=
 requests for nodes tagged with "when", and the "when"<=
/span>
=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0 condition evaluates to "false".=C2=A0 In this =
case, the server MUST

=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0 reply with an "unknown-element" <error-tag&=
gt; in the <rpc-error>.


=C2=A0


YANG module=EF=BC=9A


module foo {


=C2=A0=C2=A0 namespace =E2=80=
=9Chttp://foo.com=E2=80=9D=
;


=C2=A0=C2=A0 prefix =E2=80=9Cfo=
o=E2=80=9D;



Leaf a {=E2=80=A6}



Leaf b {



=C2=A0 When =E2=80=9Ca =3D 10=E2=80=9D;<=
/span>



}


}


Scene 1: 


The first edit-config request:<=
u>


<edit-config>


=C2=A0=C2=A0 <target><=
/u>


=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
<candidate/>


=C2=A0=C2=A0 </target>



=C2=A0=C2=A0=C2=A0<config>=
;


=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
<a xmlns=3D =E2=80=9Chttp:/=
/foo.com=E2=80=9D>3</a>


=C2=A0=C2=A0 </config>=



</edit-config><=
/u>


This request will set a =3D 3.<=
u>


=C2=A0


The second request:


<edit-config>


=C2=A0=C2=A0 <target><=
/u>


=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
<candidate/>


=C2=A0=C2=A0 </target>



=C2=A0=C2=A0=C2=A0<config>=
;


=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
<a xmlns=3D =E2=80=9Chttp:/=
/foo.com=E2=80=9D>10</a>


=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
<b xmlns=3D =E2=80=9Chttp:/=
/foo.com=E2=80=9D>5</b>


=C2=A0=C2=A0 </config>=



</edit-config><=
/u>


=C2=A0


Accord=
ing 8.3.1, in rpc payload parsing phase, the a=E2=80=99s value in candidate=
 datastore is 3,so leaf b=E2=80=99s when condition is evaluated to false,
 server will report =E2=80=98unknown-element=E2=80=99 error.


Is it =
expected by user?


Scene 2:


The first edit-config request:<=
u>


<edit-config>


=C2=A0=C2=A0 <target><=
/u>


=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
<candidate/>


=C2=A0=C2=A0 </target>



=C2=A0=C2=A0=C2=A0<config>=
;


=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
<a xmlns=3D =E2=80=9Chttp:/=
/foo.com=E2=80=9D>10</a>


=C2=A0=C2=A0 </config>=



</edit-config><=
/u>


This request will set a =3D 10.=



=C2=A0


The second request:


<edit-config>


=C2=A0=C2=A0 <target><=
/u>


=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
<candidate/>


=C2=A0=C2=A0 </target>



=C2=A0=C2=A0=C2=A0<config>=
;


=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
<a xmlns=3D =E2=80=9Chttp:/=
/foo.com=E2=80=9D>3</a>


=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
<b xmlns=3D =E2=80=9Chttp:/=
/foo.com=E2=80=9D>5</b>


=C2=A0=C2=A0 </config>=



</edit-config><=
/u>


Accord=
ing 8.3.1, in rpc payload parsing phase, the a=E2=80=99s value in candidate=
 datastore is 10, so leaf b=E2=80=99s when condition is evaluated to
 true, server will accept this request in payload parsing phase. 


=C2=A0=



In edi=
t-config request processing phase, if leaf a=E2=80=99s modification is proc=
essed firstly, the a=E2=80=99s value will be changed to 3, so the b=E2=80=
=99s
 when condition will be false, when server process b=E2=80=99s modification=
, b will be treated as unknown-element, the edit-config request will fail.



If lea=
f b=E2=80=99s modification is processed firstly, server will accept this mo=
dification ,because b=E2=80=99s when condition is true, and when server
 process a=E2=80=99s modification , this modification will be accepted, and=
 b=E2=80=99s when condition will be evaluated to false, leaf b will be dele=
ted automatically, the edit-config request will be OK.


=C2=A0=



How se=
rver should process this situation?


=C2=A0

_______________________________= ________________
netmod mailing list
netmod@ietf.org = https://www.ietf.org/mailman/listinfo/netmod

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Tue, 10 Sep 2019 20:03:41 -0400 Date: Tue, 10 Sep 2019 19:03:38 -0500 From: Benjamin Kaduk To: Kent Watsen Cc: The IESG , "netmod-chairs@ietf.org" , draft-ietf-netmod-artwork-folding@ietf.org, "netmod@ietf.org" Message-ID: <20190911000337.GQ18198@kduck.mit.edu> References: <156766366671.22774.7481795788724573201.idtracker@ietfa.amsl.com> <0100016d0372debf-16e6e132-b334-41b3-ad9c-953fd9314963-000000@email.amazonses.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <0100016d0372debf-16e6e132-b334-41b3-ad9c-953fd9314963-000000@email.amazonses.com> User-Agent: Mutt/1.10.1 (2018-07-13) Archived-At: Subject: Re: [netmod] Benjamin Kaduk's Discuss on draft-ietf-netmod-artwork-folding-09: (with DISCUSS and COMMENT) X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 11 Sep 2019 00:03:49 -0000 On Thu, Sep 05, 2019 at 10:02:03PM +0000, Kent Watsen wrote: > Hi Ben, > > Thank you for your review. Comments below. > > Update @ https://tools.ietf.org/html/draft-ietf-netmod-artwork-folding-10 > > Kent // as co-author > > > > On Sep 5, 2019, at 2:07 AM, Benjamin Kaduk via Datatracker wrote: > > > > Benjamin Kaduk has entered the following ballot position for > > draft-ietf-netmod-artwork-folding-09: 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/iesg/statement/discuss-criteria.html > > for more information about IESG DISCUSS and COMMENT positions. > > > > > > The document, along with other ballot positions, can be found here: > > https://datatracker.ietf.org/doc/draft-ietf-netmod-artwork-folding/ > > > > > > > > ---------------------------------------------------------------------- > > DISCUSS: > > ---------------------------------------------------------------------- > > > > I think the procedures described herein are incomplete without a footer > > to terminate the un-folding process. Otherwise, it seems that the > > described algorithms would leave the two-line header for the second and > > subsequent instances of folded text in a single document. (If we tried > > to just blindly remove all instances of the header without seeking > > boundaries, then we would misreconstruct content when different folding > > algorithms are used in the same document with the single-backslash > > algorithm occurring first.) > > Are you referring to when an RFC contains multiple inclusions and one is > trying to unfold them all at once? That's not the intention here, as Yes, that was what I was thinking; sorry for missing or misinterpreting the notes in Sections 7.2/8.2. > noted in paragraph 3 in both sections 7.2 and 8.2. FWIW, this sounds > like the framing problem that the WG discussed with the conclusion that > extracting from plain-text is dead, now that XML is the required > submission format, and XML provides a superior framing mechanism than any > footer we could add. > > BTW, yes, each text inclusion in a single RFC may independently be folded > using either the '\' or '\\' strategy, with the recommendation that '\' > always be tried first and '\\' only used when '\' fails. > > If referring to a single text content instance, could you provide an > example illustrating the concern? > > > > > > I don't think it's proper to refer to a script that requires bash > > specifically as a "POSIX shell script". I did not attmept to check > > whether any bash-specific features are used or this requirements stems > > solely from the shebang line, though. > > I just changed "POSIX" to "Bash" in the title for Appendix A. > > Not that it matters, but "--posix" is passed into `bash` on the first > line of the script ;) > > > > > I think the shell script does need to use double-quotes around some > > variable expansions, especially "$infile" and "$outfile", to work > > properly for filenames containing spaces. We do quote "$infile" when > > we're checking that it exists, just not (most of the time) when we > > actually use it! > > Updated. > > > > > In addition to the above, I also share Alissa's (and Mirja's) concerns, > > but feel that Discuss is more appropriate than Abstain, so we can > > discuss what the best way to get this content published is. For it's > > fine content, and we should see it published; it's just not immediately > > clear to me what the right way to do so is. > > Agreed. For now, I've changed it to Informational, but I think there > remains a discussion around if the draft should be re-rerun through the > IAB stream. My responses today to Alissa's Abstain and Suresh Discuss > dig into this. Is it okay to use those threads for this item? Please do; this point was mostly intended to make sure that we didn't inadvertently approve the document while those discussions were still going on. > > > ---------------------------------------------------------------------- > > COMMENT: > > ---------------------------------------------------------------------- > > > > Section 4.1 > > > > Automated folding of long lines is needed in order to support draft > > compilations that entail a) validation of source input files (e.g., > > XML, JSON, ABNF, ASN.1) and/or b) dynamic generation of output, using > > a tool that doesn't observe line lengths, that is stitched into the > > final document to be submitted. > > > > I don't think the intended meaning of "source input files" will be > > clear to all readers just from this text. Some discussion of how RFCs > > can consider source code, data structures, generated output, etc., that > > have standalone representations and natural formats, and the need to > > display their contents in the RFC format that has different > > requirements might be helpful context for this paragraph and the next. > > Is the updated text more understandable? Yes, thanks > > > > Section 7.1.2 > > > > For some reason my mental model of "RFC style" does not use the word > > "really" in this way, and prefers alternatives like "very" or > > "exceptionally". (Also in Section 8.1.2.) > > s/Really/Exceptionally/ in both cases. > > > > Section 7.2.1 > > > > 1. Determine where the fold will occur. This location MUST be > > before or at the desired maximum column, and MUST NOT be chosen such > > that the character immediately after the fold is a space (' ') > > character. For forced foldings, the location is between the > > > > This is a rather awkward natural line break. I suggest an RFC Editor > > note to make sure that the punctuation around the space character all > > appears on the same line. > > RFC Editor note added, near the top of the draft. > > > > > 3. On the following line, insert any number of space (' ') > > characters. > > > > I'm not sure I'd characterize the procedure as "complete" when it > > leaves the value of the output subject to implementation choice such as > > this. (Note that the next paragraph talks about the resulting > > "arbitrary number of space" characters, and would presumably also need > > to be adjusted if this text was adjusted.) We also don't seem to bound > > this number of spaces to be fewer than the target line length, which > > only matters in some weirdly pedantic sense. > > Added "subject to the resulting line not exceeding the desired maximum" > to both locations in the draft. > > > > > Section 7.2.2 > > > > Scan the beginning of the text content for the header described in > > Section 7.1.1. If the header is not present, starting on the first > > line of the text content, exit (this text contents does not need to > > be unfolded). > > > > I'm not sure I understand what "starting on the first line of the text > > content" is intended to mean. (Also in 8.2.2.) > > I think you are saying that it seems overly prescriptive, given that the > previous sentence says "beginning" and "header", it defies logic that the > header might not start on the first line and, by this text calling it > out, it suggests something special is going on. Is this what you mean? > To be clear, the only intention here is to catch the case whereby there > might be, e.g., some blank lines preceding the header. Do you think the > "starting on the first line of the text content" fragment should be > removed? I think I was too confused by the text to be complaining that it was overly prescriptive :( I guess my complaint is that it seems ambiguous whether this is "the procedure says: start on the first line of text content, and check for the header" or "If the header is not present [anywhere in the content], start on the first line of content, and exit". That is, I think the order in which the clauses appear confuses me, with perhaps some exacerbation by verb tense. I support being able to cope with some blank lines preceding the header! > > Section 8.2.1 > > > > If this text content needs to and can be folded, insert the header > > described in Section 8.1.1, ensuring that any additional printable > > characters surrounding the header do not result in a line exceeding > > the desired maximum. > > > > We discussed above some cases when text could not be folded using the > > algorithm from Section 7.2.1; in what case could text not be folded > > with this algorithm? Just the case when the implementation doesn't > > support forced folding? > > Yes, that's the only case known. But what does this have to do with > Section 8.2.1? Are you keying off of the "needs to" part? Is it okay? I was just trying to check that we have given the reader enough information to ascertain the "can be folded" result. > > Section 10 > > > > We should warn against implementations scanning past the end of a > > buffer (containing the entire contents of a file) when checking what's > > in the beginning of the next line -- if a file ends with a backslash > > and "end of line" but no further content, we could perform an out of > > bounds access if the code assumes it is safe to check for the next > > line's initial content. > > Both Sections 7.2.2 and 8.2.2 describe conditions to determine when > unfolding occurs. AFIACT, in both cases, the unfolding algorithm stays > within the bounds of those conditions. These procedures are fine if you're operating in a context where you interact with the text corpus via "get next line" operations. But I don't think we have limited ourselves to such contexts; consider the case where I (foolishly) write text-processing code in C, and read(2) the text in question into a memory buffer. I'm on my own for linebreak detection, and if I start peeking past escape characters, it's not so hard to imagine that I could fail to check for "end of buffer" and trigger undefined behavior. > For instance, given the input sequence [ '\' '\n' EOF] , the 7.2.2 > algorithm would replace it with [ EOF ] and the 8.2.2 algorithm wouldn't > even attempt to unfold it since the condition of the next line containing > a second '\' character isn't met. > > Is this Security Consideration needed? Well, it's a nonblocking comment. So if the above description seems totally implausible to you, I can accept it not being included in the document. > > > > Section 12.2 > > > > I think that RFC 7991 could be normative, since we say "per RFC 7991" > > to describe some requirements on behavior. Likewise for RFC 7994, > > whose character encoding requirements we incorporate by reference. > > Given that this format may be used in contexts outside the IETF, it seems > that understanding RFC 7991 is optional. Agreed? For most of the occurrences of 7991 references, I agree with you. The only one that makes me think otherwise is in Section 7.1.2: The character encoding is the same as described in Section 2 of [RFC7994], except that, per [RFC7991], tab characters are prohibited. which is a statement of behavior that defers to an external specification. > > > > Appendix A > > > > I could perhaps argue that we should include a reference to POSIX for > > "POSIX shell script" but find it somewhat hard to believe that this > > would be a problem in practice. It's also moot since we require bash > > specifically, so we'd need to reference bash instead of POSIX. > > Per above, "POSIX" is now "Bash" in the title. I added an Informative > reference for Bash. Thanks! > > > copy/paste the script for local use. As should be evident by the > > lack of the mandatory header described in Section 7.1.1, these > > backslashes do not designate a folded line, such as described in > > Section 7. > > > > It perhaps should be, but I think currently is not -- we only talk > > about using the two-line header to detect instances of folding, without > > mention of a requirement to be contained within / > ENDS> or similar. > > Correct. The 2-line header is missing. That / > appears is secondary. Is there anything to be done here? In light of the previous discussion about extracting artwork individually from the document, probably not. Though it seems the -10 has added a line-wrapping header to the script, which seems to be inadvertent, if I understand correctly. > > It seems that my perception of "common shell style" diverges from that > > presented in this document, which is not necessarily problematic. > > (Things like what diagnostics go to stdout vs. stderr, use or "> > > /dev/null" vs ">> /dev/null", etc.) > > I fixed one "> /dev/null" case. Heh, I was trying to say that I prefer to always write "> /dev/null", while acknowledging that my preference is irrelevant for this document. I'm glad it helped to fix a consistency nit, though! > As for style, we could review line by line but, for the cases where > output is directed to /dev/null/, it's unclear where the output is > needed, only the exit code status ever seems to matter. > > > > printf "Usage: rfcfold [-s ] [-c ] [-r] -i " > > printf " -o \n" > > > > This summary usage line doesn't mention -d, -q, or -h. (Maybe it > > doesn't have to, of course.) > > Added. > > > > # ensure input file doesn't contain a TAB grep $'\t' $infile >> > > /dev/null 2>&1 > > > > (`grep -q` is a thing, here and elsewhere.) > > Added. > > > > # unfold wip file "$SED" '{H;$!d};x;s/^\n//;s/\\\n *//g' > > $temp_dir/wip > $outfile > > > > [I don't remember why the s/^\n// is needed; similarly for the > > unfold_it_2() case.] > > Erik responded to this point already. > > > > if [[ $strategy -eq 2 ]]; then min_supported=`expr ${#hdr_txt_2} + > > 8` else min_supported=`expr ${#hdr_txt_1} + 8` fi > > > > On the face of it this seems like it will produce "folded" output that > > exceeds the line length, when we give min_supported of 54, use > > autodetection of strategy, and have input that is incompatible with > > fold_it_1(). > > Fixed off-by-one error. > > > > > process_input $@ > > > > Need double-quotes around "$@" to properly handle arguments with > > embedded spaces. > > Added. Thanks! I'll try to find time to look at the new script with an eye for quoting, and update my position in the datatracker; please start complaining if I haven't done so and the other threads about where/how to publish have come to a conclusion. -Ben From nobody Tue Sep 10 17:58:50 2019 Return-Path: X-Original-To: netmod@ietf.org Delivered-To: netmod@ietfa.amsl.com Received: from ietfa.amsl.com (localhost [IPv6:::1]) by ietfa.amsl.com (Postfix) with ESMTP id B0D521207FC; Tue, 10 Sep 2019 17:58:41 -0700 (PDT) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit From: internet-drafts@ietf.org To: Cc: netmod@ietf.org X-Test-IDTracker: no X-IETF-IDTracker: 6.101.0 Auto-Submitted: auto-generated Precedence: bulk Reply-To: netmod@ietf.org Message-ID: <156816352160.22365.5278354083213675388@ietfa.amsl.com> Date: Tue, 10 Sep 2019 17:58:41 -0700 Archived-At: Subject: [netmod] I-D Action: draft-ietf-netmod-factory-default-03.txt X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 11 Sep 2019 00:58:43 -0000 A New Internet-Draft is available from the on-line Internet-Drafts directories. This draft is a work item of the Network Modeling WG of the IETF. Title : Factory Default Setting Authors : Qin Wu Balazs Lengyel Ye Niu Filename : draft-ietf-netmod-factory-default-03.txt Pages : 11 Date : 2019-09-10 Abstract: This document defines a method to reset a server to its factory- default content. The reset operation may be used e.g. during initial zero-touch configuration or when the existing configuration has major errors, so re-starting the configuration process from scratch is the best option. A new factory-reset RPC is defined. Several methods of documenting the factory-default content are specified. Optionally a new "factory-default" read-only datastore is defined, that contains the data that will be copied over to the running datastore at reset. The IETF datatracker status page for this draft is: https://datatracker.ietf.org/doc/draft-ietf-netmod-factory-default/ There are also htmlized versions available at: https://tools.ietf.org/html/draft-ietf-netmod-factory-default-03 https://datatracker.ietf.org/doc/html/draft-ietf-netmod-factory-default-03 A diff from the previous version is available at: https://www.ietf.org/rfcdiff?url2=draft-ietf-netmod-factory-default-03 Please note that it may take a couple of minutes from the time of submission until the htmlized version and diff are available at tools.ietf.org. Internet-Drafts are also available by anonymous FTP at: ftp://ftp.ietf.org/internet-drafts/ From nobody Tue Sep 10 18:05:44 2019 Return-Path: X-Original-To: netmod@ietfa.amsl.com Delivered-To: netmod@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 8BF851200E0 for ; Tue, 10 Sep 2019 18:05:43 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -4.2 X-Spam-Level: X-Spam-Status: No, score=-4.2 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id D2iF0U87vdyn for ; Tue, 10 Sep 2019 18:05:41 -0700 (PDT) Received: from huawei.com (lhrrgout.huawei.com [185.176.76.210]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 66884120232 for ; Tue, 10 Sep 2019 18:05:41 -0700 (PDT) Received: from lhreml704-cah.china.huawei.com (unknown [172.18.7.106]) by Forcepoint Email with ESMTP id 43DC48ADCEDB647CEC66 for ; Wed, 11 Sep 2019 02:05:38 +0100 (IST) Received: from DGGEML404-HUB.china.huawei.com (10.3.17.39) by lhreml704-cah.china.huawei.com (10.201.108.45) with Microsoft SMTP Server (TLS) id 14.3.408.0; Wed, 11 Sep 2019 02:05:37 +0100 Received: from DGGEML511-MBX.china.huawei.com ([169.254.1.20]) by DGGEML404-HUB.china.huawei.com ([fe80::b177:a243:7a69:5ab8%31]) with mapi id 14.03.0439.000; Wed, 11 Sep 2019 09:05:34 +0800 From: Qin Wu To: "netmod@ietf.org" Thread-Topic: [netmod] I-D Action: draft-ietf-netmod-factory-default-03.txt Thread-Index: AdVoPP6GsPpUVszOSBa5zS0I7FodWw== Date: Wed, 11 Sep 2019 01:05:34 +0000 Message-ID: Accept-Language: zh-CN, en-US Content-Language: zh-CN X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.134.31.203] Content-Type: text/plain; charset="gb2312" Content-Transfer-Encoding: base64 MIME-Version: 1.0 X-CFilter-Loop: Reflected Archived-At: Subject: Re: [netmod] I-D Action: draft-ietf-netmod-factory-default-03.txt X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 11 Sep 2019 01:05:43 -0000 di0wMyBpcyBwb3N0ZWQsIHRoZSBtYWluIGNoYW5nZSBpcyB0byB1cGRhdGUgc2VjdXJpdHkgc2Vj dGlvbiB0byBhZGRyZXNzIGNvbW1lbnRzIHJhaXNlZCBpbiBsYXN0IElFVEYgbWVldGluZy4NCmh0 dHBzOi8vZGF0YXRyYWNrZXIuaWV0Zi5vcmcvZG9jL2h0bWwvZHJhZnQtaWV0Zi1uZXRtb2QtZmFj dG9yeS1kZWZhdWx0LTAzDQoNCi1RaW4NCi0tLS0t08q8/tStvP4tLS0tLQ0Kt6K8/sjLOiBuZXRt b2QgW21haWx0bzpuZXRtb2QtYm91bmNlc0BpZXRmLm9yZ10gtPqx7SBpbnRlcm5ldC1kcmFmdHNA aWV0Zi5vcmcNCreiy83KsbzkOiAyMDE5xOo51MIxMcjVIDg6NTkNCsrVvP7IyzogaS1kLWFubm91 bmNlQGlldGYub3JnDQqzrcvNOiBuZXRtb2RAaWV0Zi5vcmcNCtb3zOI6IFtuZXRtb2RdIEktRCBB 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nobody Sun Sep 15 04:31:34 2019 Return-Path: X-Original-To: netmod@ietfa.amsl.com Delivered-To: netmod@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id CCF27120026; Sun, 15 Sep 2019 04:31:26 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -4.196 X-Spam-Level: X-Spam-Status: No, score=-4.196 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, MAY_BE_FORGED=0.001, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_NONE=0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id lDmqME6mIzI5; Sun, 15 Sep 2019 04:31:24 -0700 (PDT) Received: from mailgw1.uni-kl.de (mailgw1.uni-kl.de [IPv6:2001:638:208:120::220]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 6682E12000F; Sun, 15 Sep 2019 04:31:24 -0700 (PDT) Received: from [172.20.10.2] (x2e720334.dyn.telefonica.de [46.114.3.52] (may be forged)) (authenticated bits=0) by mailgw1.uni-kl.de (8.14.4/8.14.4/Debian-8+deb8u2) with ESMTP id x8FBVAws156849 (version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sun, 15 Sep 2019 13:31:20 +0200 To: Benjamin Kaduk , Kent Watsen Cc: "netmod-chairs@ietf.org" , draft-ietf-netmod-artwork-folding@ietf.org, The IESG , "netmod@ietf.org" References: <156766366671.22774.7481795788724573201.idtracker@ietfa.amsl.com> <0100016d0372debf-16e6e132-b334-41b3-ad9c-953fd9314963-000000@email.amazonses.com> <20190911000337.GQ18198@kduck.mit.edu> From: Erik Auerswald Message-ID: <2df2e7e9-0580-ec1f-07a8-dbad7b72db70@unix-ag.uni-kl.de> Date: Sun, 15 Sep 2019 13:31:09 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 In-Reply-To: <20190911000337.GQ18198@kduck.mit.edu> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-GB Content-Transfer-Encoding: 7bit Archived-At: Subject: Re: [netmod] Benjamin Kaduk's Discuss on draft-ietf-netmod-artwork-folding-09: (with DISCUSS and COMMENT) X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 15 Sep 2019 11:31:27 -0000 Hi Ben, comments regarding just the security considerations below. On 11.09.19 02:03, Benjamin Kaduk wrote: > On Thu, Sep 05, 2019 at 10:02:03PM +0000, Kent Watsen wrote: >>> On Sep 5, 2019, at 2:07 AM, Benjamin Kaduk via Datatracker wrote: >>> [...] >>> Section 10 >>> >>> We should warn against implementations scanning past the end of a >>> buffer (containing the entire contents of a file) when checking what's >>> in the beginning of the next line -- if a file ends with a backslash >>> and "end of line" but no further content, we could perform an out of >>> bounds access if the code assumes it is safe to check for the next >>> line's initial content. In a way that is like requiring any IS-IS draft to warn not to blindly trust the received length value. I do understand your concern. All input needs to be handled safely. For example, the "heartbleed" vulnerability was caused by blindly trusting a length value received from the network. But validating input and checking buffer boundaries are general programming concepts and I do not think it useful to single out one (or a few) and treat them specially in one I-D, but not others. This could create the impression that checking buffer boundaries is important here, but not in those other places. And mentioning just the buffer boundaries ignores the short read that is quite likely to occur at end of file (the garbage left in the buffer after the last byte read must be ignored as well, or content integrity is violated, which might change the meaning of the I-D or add a vulnerability to the code inside the I-D[1]). >> Both Sections 7.2.2 and 8.2.2 describe conditions to determine when >> unfolding occurs. AFIACT, in both cases, the unfolding algorithm stays >> within the bounds of those conditions. > > These procedures are fine if you're operating in a context where you > interact with the text corpus via "get next line" operations. But I don't > think we have limited ourselves to such contexts; consider the case where I > (foolishly) write text-processing code in C, and read(2) the text in > question into a memory buffer. I'm on my own for linebreak detection, and > if I start peeking past escape characters, it's not so hard to imagine that > I could fail to check for "end of buffer" and trigger undefined behavior. This is true whenever something similar to C and read(2) is used to fill a fixed size buffer with some bytes. This can create many problems, e.g., splitting UTF-8 characters, or reading less than the buffer size (short read, not only possible on EOF). All of those need to be handled correctly. This holds all the time, not just when implementing the folding algorithms from this I-D. Reading more than one byte at a time is an optimization only, it is not needed for correct function. This optimization is dangerous, because it adds significant complexity. Despite this it is used all the time without handling all the corner cases, so again, I do understand your concerns. >> For instance, given the input sequence [ '\' '\n' EOF] , the 7.2.2 >> algorithm would replace it with [ EOF ] and the 8.2.2 algorithm wouldn't >> even attempt to unfold it since the condition of the next line containing >> a second '\' character isn't met. >> >> Is this Security Consideration needed? > > Well, it's a nonblocking comment. So if the above description seems > totally implausible to you, I can accept it not being included in the > document. As I see it, the gist of your comment is "implementing the algorithm incorrectly might result in security vulnerabilities, depending on the implementation details." But is this a helpful security consideration? I do not think so. Thanks, Erik [1] Knowing the buffer size (e.g., after probing) could enable to create input data that creates an XML injection which could result in an attack on some tool to process I-Ds reachable via Internet. This is kind of a contrived example, but not completely implausible. From nobody Fri Sep 20 06:24:01 2019 Return-Path: X-Original-To: netmod@ietfa.amsl.com Delivered-To: netmod@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 139001200C3 for ; Fri, 20 Sep 2019 06:24:00 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.625 X-Spam-Level: X-Spam-Status: No, score=-2.625 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H2=-0.026, SPF_HELO_NONE=0.001, SPF_PASS=-0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (768-bit key) header.d=labn.net Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id AJu0irS5i3Sg for ; Fri, 20 Sep 2019 06:23:58 -0700 (PDT) Received: from gproxy6-pub.mail.unifiedlayer.com (outbound-ss-348.hostmonster.com [74.220.202.212]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 328F5120024 for ; Fri, 20 Sep 2019 06:23:58 -0700 (PDT) Received: from cmgw10.unifiedlayer.com (unknown [10.9.0.10]) by gproxy6.mail.unifiedlayer.com (Postfix) with ESMTP id 00ABB1E08BE for ; Fri, 20 Sep 2019 07:23:39 -0600 (MDT) Received: from box313.bluehost.com ([69.89.31.113]) by cmsmtp with ESMTP id BIssi5Rc3awnoBIssiLd6Q; Fri, 20 Sep 2019 07:23:38 -0600 X-Authority-Reason: nr=8 X-Authority-Analysis: v=2.3 cv=V9xTL9vi c=1 sm=1 tr=0 a=h1BC+oY+fLhyFmnTBx92Jg==:117 a=h1BC+oY+fLhyFmnTBx92Jg==:17 a=DAwyPP_o2Byb1YXLmDAA:9 a=G5z4KiUBrY_248OUbIQA:9 a=byM0q-JwBf9Ob5qq:21 a=QQwHU-k5PcfrtbK8:21 a=x-TTg3k61sHEMACEjG8A:9 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=labn.net; s=default; h=Content-Type:MIME-Version:Message-ID:Date:Subject:To:From: Sender:Reply-To:Cc:Content-Transfer-Encoding:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: In-Reply-To:References:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=RHVFMHImGgDs/Rrp7E7yRqkgw5n+YWjQXR+39NDFl98=; b=BjnI4LJg1I3Df6M9KADUREtbDM eiw+zbiCtik8tPFDYMQttC5NntPUpWn5uaEhdZsS2RNwovfWCqM0WwJPH/4Tbo5/trV4xAryD0ksH nE9oQGHg8EZqvx8IWYaN16UQl; Received: from [109.144.218.212] (port=12737 helo=FedykLabn) by box313.bluehost.com with esmtpsa (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.92) (envelope-from ) id 1iBIss-002hIH-EK for netmod@ietf.org; Fri, 20 Sep 2019 07:23:38 -0600 From: "Don Fedyk" To: Date: Fri, 20 Sep 2019 09:23:36 -0400 Message-ID: <000801d56fb6$9d76fe90$d864fbb0$@labn.net> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0009_01D56F95.166621E0" X-Mailer: Microsoft Outlook 16.0 Thread-Index: AdVvtb220WVlpvm3Rs2epRVdtzLyQQ== Content-Language: en-us X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - box313.bluehost.com X-AntiAbuse: Original Domain - ietf.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - labn.net X-BWhitelist: no X-Source-IP: 109.144.218.212 X-Source-L: No X-Exim-ID: 1iBIss-002hIH-EK X-Source: X-Source-Args: X-Source-Dir: X-Source-Sender: (FedykLabn) [109.144.218.212]:12737 X-Source-Auth: dfedyk@labn.net X-Email-Count: 1 X-Source-Cap: bGFibm1vYmk7bGFibm1vYmk7Ym94MzEzLmJsdWVob3N0LmNvbQ== X-Local-Domain: yes Archived-At: Subject: [netmod] Comments on draft-ietf-netmod-sub-intf-vlan-model-05 X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 20 Sep 2019 13:24:00 -0000 This is a multipart message in MIME format. ------=_NextPart_000_0009_01D56F95.166621E0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Some comments on the draft : On the content of the draft L3 Section: Overall the draft assumes quite a bit of knowledge about L3 service configuration. I don't know where L3 service to interfaces in the IETF models. I'd guess it is routing to interfaces and IP forwarding based on routing but if it is defined, pointers in the draft would help. From what I understand this draft allows a L3 service interface to terminate to an Ethernet with any combination of 2 VLAN tags. The draft does not state it but I assume this encapsulation is symmetric. (Symmetrical/Asymmetrical is only mentioned for L2). Note the implied service context (what you get when you strip the tags) allows for symmetric traffic . For L3 this is typically MPLS or IP 5 tuple etc. On the layer 2 section: For the L2VPN case there is already a YANG file that describes the Service VLAN tagging. I'm trying to figure you what your draft brings to this case. It seems to me this draft allows (more) flexible tagging for the unqualified/unqualified learning VPNs. By allowing translation and possibly carrying more tags a single VLAN can carry more diverse traffic. However there are subtleties in doing VLAN translation. Without examples of applications I'm left guessing how this is intended to be applied. Also it is not as easy for me to understand the service context as with L3 above. How do you identify untagged traffic (or is it a tag swapping model?) In L2 VPNs the classic case of qualified learning (also called independent VLAN learning in IEEE) removes the (one) outer tag and carries the second tag in the MPLS frame. The MPLS label stack is the context for the service. The second tag is assumed unique in the qualified domain. In Unqualified learning (or shared VLAN learning) removing the one outer tag and means the possibility collisions in the second tag space - no unique context is maintained this is where VLAN translation has typically been used. In both cases the second tag is not changed. One application of your draft implies to me that you support he same models but the second tag can be changed. Can you support both unqualified and qualified with the flexible tagging and does it change any of the established capabilities? Or something else? It would be really great clarify. Some text on applicability with concrete L2VPN examples would help and what it offers over the current L2VPN Yang. Therefore my suggestion is that the draft say something to the effect that: . The draft is limited to the a port/service interface/access model . The draft is agnostic to the full range of the Ethernet functions that rely on the IEEE 802.1 component model. . The draft uses Ethernet compatible Tagging to allow bridging in between endpoints or interworking with bridges in a with a subset functionality.* *Note the draft is adding some other functionally that is outside/alternative to the IEEE 802.1 functions but it interworks with Ethernet on a subset. I think you do have to revisit some the language around compatibility with compliant bridges with respect to the above points. Best regards Don ------=_NextPart_000_0009_01D56F95.166621E0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Some comments on the draft :

 

On the = content of the draft L3 Section: 

Overall the draft assumes quite a bit of knowledge = about L3 service configuration.  I don’t know where L3 = service to interfaces in the IETF models.  I’d guess it is = routing to interfaces and IP forwarding based on routing but if it is = defined, pointers in the draft would help.  From what I understand = this draft allows a L3 service interface to terminate to an Ethernet = with any combination of 2 VLAN tags.  The draft does not state it = but I assume this encapsulation is symmetric. =  (Symmetrical/Asymmetrical is only mentioned for L2).   = Note the implied service context (what you get when you strip the tags) = allows for symmetric traffic . For  L3 this is typically MPLS or IP = 5 tuple etc.

 

On the layer 2 section: 

For the L2VPN case there is already a YANG file that = describes the Service VLAN tagging.   I’m trying to = figure you what your draft brings to this case.  It seems to me = this draft allows (more) flexible tagging for the = unqualified/unqualified learning VPNs.  By allowing translation and = possibly carrying more tags a single VLAN can carry more diverse = traffic.  However there are subtleties in doing VLAN = translation.  Without examples of applications I’m left = guessing how this is intended to be applied.  Also it is not as = easy for me to understand the service context as with L3 = above.   How do you identify untagged traffic (or is it a tag = swapping model?) In L2 VPNs the classic case of qualified learning (also = called independent VLAN learning in IEEE) removes the (one) outer tag = and carries the second tag in the MPLS frame.  The MPLS label stack = is the context for the service. The second tag is assumed unique in the = qualified domain. In Unqualified learning (or shared VLAN learning) = removing the one outer tag and means the possibility collisions in the = second tag space – no unique context is maintained this is where = VLAN translation has typically been used.  In both cases the second = tag is not changed.  One application of your draft implies to me = that you support he same models but the second tag can be changed. Can = you support both unqualified and qualified with the flexible tagging and = does it change any of the established capabilities?  Or something = else?  It would be really great clarify.   Some text on = applicability with concrete L2VPN examples would help and what it offers = over the current L2VPN Yang.

 

 

Therefore my = suggestion is that the draft say something to the effect that: =

•        =      The draft is limited to the a port/service = interface/access model

•        =      The draft is agnostic to the full range of the = Ethernet functions that rely on the IEEE 802.1 component model. =

•        =      The draft uses Ethernet compatible Tagging to = allow bridging in between endpoints or interworking with bridges in a = with a subset functionality.*

 

*Note the = draft is adding some other functionally that is outside/alternative to = the IEEE 802.1 functions but it interworks with Ethernet on a subset. =

I think you do have to revisit some = the language around compatibility with compliant bridges with respect to = the above points.

 

 

Best = regards

Don

------=_NextPart_000_0009_01D56F95.166621E0-- From nobody Sun Sep 22 12:42:27 2019 Return-Path: X-Original-To: netmod@ietfa.amsl.com Delivered-To: netmod@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 2645212004C for ; Sun, 22 Sep 2019 12:42:25 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -0.756 X-Spam-Level: X-Spam-Status: No, score=-0.756 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, HTML_MESSAGE=0.001, NUMERIC_HTTP_ADDR=1.242, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1024-bit key) header.d=shytyi.net Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id vZZ_afUIFpXT for ; Sun, 22 Sep 2019 12:42:19 -0700 (PDT) Received: from sender-of-o52.zoho.eu (sender-of-o52.zoho.eu [185.20.209.248]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 1C0A812002E for ; Sun, 22 Sep 2019 12:42:18 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1569181317; cv=none; d=zohomail.eu; s=zohoarc; b=e/cKKIFXjtkSemx0H1WgW0wScZDR1zJ4SA/k0mIzJXx/zeuPH1AsGzdw3htAC7zWqbSwjZErxvfY2kLQHiW8Ap2rCPf4bcO0y9JG8Jzk/68segsX/RcQxH5+44LKHnvT8xOLwR2xEI6MjGTmuysIcZvci9WhG4yCPT4504v55s4= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.eu; s=zohoarc; t=1569181317; h=Content-Type:Cc:Date:From:In-Reply-To:MIME-Version:Message-ID:References:Subject:To:ARC-Authentication-Results; bh=+iVyNUky8GDss3Jht2n63n6o2l1ogdoGmie700kZp2M=; b=OnNSwdrtK9b3i5dpi91ln2PJxQFqNgpiyHXBQPJvEVxzNXMxxddA25li4iYb3ZelnTeZqLydWhX5kV1V7aDm1dl/2X8Pvj/Q6XHXYguh7B+sJnSDhyIhvFDS8CYqkyeftd1zk+X9NE3mU7FG/veX9vTitj/KPChAfjOM2RSijHc= ARC-Authentication-Results: i=1; mx.zohomail.eu; dkim=pass header.i=shytyi.net; spf=pass smtp.mailfrom=ietf.dmytro@shytyi.net; dmarc=pass header.from= header.from= DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; t=1569181317; s=hs; d=shytyi.net; i=ietf.dmytro@shytyi.net; h=Date:From:To:Cc:Message-Id:In-Reply-To:References:Subject:MIME-Version:Content-Type; l=89124; bh=+iVyNUky8GDss3Jht2n63n6o2l1ogdoGmie700kZp2M=; b=XJWkKVChc76dbBxoCGbSHdaEQLqKldkY+1qOIsj/bcqGn1f4g6IA0elCcpnOj2sc OXjEMVvnT/cZz4L0gQ8zdPJTaH4IvB+cqbWPZCTgCiHvFimOp3HHkAcnbKndTAi/PVr 1HpRYVghZKjwZtGUT9HYwjqjvTbiMo8KvrCOCHYA= Received: from mail.zoho.eu by mx.zoho.eu with SMTP id 1569181315809277.522099763528; Sun, 22 Sep 2019 21:41:55 +0200 (CEST) Date: Sun, 22 Sep 2019 21:41:55 +0200 From: Dmytro Shytyi To: "Mahesh Jethanandani" Cc: "Robert Varga" , "billwu" , "netmod" , "Diego Lopez" Message-Id: <16d5a7eb2d6.ce778468222448.6962867845902399388@shytyi.net> In-Reply-To: <01199895-90CF-4A7E-89E8-BDC4800798B2@gmail.com> References: <155377227553.1573.8548464832229347361.idtracker@ietfa.amsl.com> <16caabd07ae.de4789c8151923.6368018099125205208@shytyi.net> <16cba30dec2.b91b31ed256364.8160264793634017255@shytyi.net> <16cd3d19305.11aec1852361697.7576623717058940792@shytyi.net> <5219ac80-b607-b4b4-8c77-72950d4c5137@hq.sk> <16cd8798b80.b402ce899813.5192375594519800096@shytyi.net> <16d022a2635.cf0e2e825020.1253681289762507320@shytyi.net> <16d033d38e7.bbb2af8a11544.6493791187744876181@shytyi.net> <01199895-90CF-4A7E-89E8-BDC4800798B2@gmail.com> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_628155_455362716.1569181315799" X-Priority: Medium User-Agent: Zoho Mail X-Mailer: Zoho Mail Archived-At: Subject: Re: [netmod] New Version draft-shytyi-netmod-vysm-02.txt as Working Group document. X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 22 Sep 2019 19:42:25 -0000 ------=_Part_628155_455362716.1569181315799 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hello Mahesh, I would like to thank you for your comments. ---- On Fri, 06 Sep 2019 03:43:05 +0200 Mahesh Jethanandani wrote ---- Hi Dmytro, First of all, I find the discussion within the netmod WG as just the wrong = place to have this discussion. You will be hard pressed to find too many pe= ople who can give you critical feedback on the model in this WG. [Dmytro] Thank you for this suggestion. See inline with [mj] On Sep 5, 2019, at 2:03 PM, Dmytro Shytyi w= rote: [Dmytro] Hello Mahesh Jethanandani, Thank you for your comment. Please find answers inline. >I find the representation of a service model in this draft for a uCPE as t= oo simple. In reality, on a uCPE, you could be running a Network Service (N= S), which is composed of multiple VNFs interconnected together. This servic= e model does not address such a configuration. [Dmytro] This service model presented in the draft supports N VMs in the NS and addr= eses configuration with multiple VMs and switches with plenty of links. It = is well tested (with service chained VMs) on equipent from different well k= nown suppliers. The idea to have complex flexible service in the network se= rvice orchestrator for uCPE. in the yang model we have list (marked by pyang with "*") of VMs where the = key is name of the vm, thus you may define as much VM as you wish. [mj] You have introduced concept of interfaces, ports, and switches that do= es not exist in the NFV world. VNFs have virtual links and connection point= s. There is no (physical) port or interface that one connects to in a VNF. = It might exist on the server on which the VM runs but not in a VNF or a vir= tualization instance. [Dmytro] The uCPEs have these items. Therefore the model that was created w= as created for uCPE management part. I will adjust the draft regarding your= comment.=C2=A0 Example of 2 VMs that are service chained (swLAN-VM1-swService-VM2-swWAN) =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 +--rw vms* [vm] =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 +--rw vm=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 string =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 +--rw ports* [port] =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 |=C2=A0 +--rw port=C2= =A0=C2=A0=C2=A0 string =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 |=C2=A0 +--rw name?=C2= =A0=C2=A0 string =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 |=C2=A0 +--rw link?=C2= =A0=C2=A0 -> ../../../links/link =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 +--rw ram?=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 string =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 +--rw cpu?=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 string =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 +--rw storages* [id] =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 |=C2=A0 +--rw id=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 string =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 |=C2=A0 +--rw location?= =C2=A0=C2=A0 string =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 +--rw day0-config =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 +--rw= location?=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 string =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 +--rw= day0-var-path?=C2=A0=C2=A0 string =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 +--rw= variable* [name] =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0 +--rw name=C2=A0=C2=A0=C2=A0=C2=A0 string =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0 +--rw value?=C2=A0=C2=A0 string So basically=C2=A0 the list "+--rw wms* [vm]" can be represented/"expanded"= in this way where the names and number ov vms(N) is set by user: =C2=A0>>>>>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 +--rw vm1=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 string =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0|=C2=A0 =C2=A0 =C2=A0+--rw ports* [port] =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0|=C2=A0 =C2=A0 =C2=A0|=C2=A0 +--rw port=C2=A0=C2=A0=C2=A0 string =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0|=C2=A0 =C2=A0 =C2=A0|=C2=A0 +--rw name?=C2=A0=C2=A0 string =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0|=C2=A0 =C2=A0 =C2=A0|=C2=A0 +--rw link?=C2=A0=C2=A0 -> ../../../= links/link =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0|=C2=A0 =C2=A0 =C2=A0+--rw ram?=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0 string =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0|=C2=A0 =C2=A0 =C2=A0+--rw cpu?=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0 string =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0|=C2=A0 =C2=A0 =C2=A0+--rw storages* [id] =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0|=C2=A0 =C2=A0 =C2=A0|=C2=A0 +--rw id=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0 string =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0|=C2=A0 =C2=A0 =C2=A0|=C2=A0 +--rw location?=C2=A0=C2=A0 string =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0|=C2=A0 =C2=A0 =C2=A0+--rw day0-config =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0|=C2=A0 =C2=A0 =C2=A0|=C2=A0 +--rw location?=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0 string =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0|=C2=A0 =C2=A0 =C2=A0|=C2=A0 +--rw day0-var-path?=C2=A0=C2=A0 str= ing =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0|=C2=A0 =C2=A0 =C2=A0|=C2=A0 +--rw variable* [name] =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0|=C2=A0 =C2=A0 =C2=A0|=C2=A0=C2=A0=C2=A0=C2=A0 +--rw name=C2=A0= =C2=A0=C2=A0=C2=A0 string =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0|=C2=A0 =C2=A0 =C2=A0|=C2=A0=C2=A0=C2=A0=C2=A0 +--rw value?=C2=A0= =C2=A0 string >>>>>=C2=A0 =C2=A0 =C2=A0 =C2=A0 +--rw vm2=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 string 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=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0+--rw location?=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0 string =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 +--rw day0-var-path?=C2=A0=C2=A0 string =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 +--rw variable* [name] =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0+--rw name=C2=A0=C2=A0=C2= =A0=C2=A0 string =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0+--rw value?=C2=A0=C2=A0 s= tring [mj] I understand how you instantiate multiple VMs. What I do not understan= d is for example, your representation of a link. Currently, it points to a = link definition within the same Virtualization instance. How does that tell= me what is it connected to? [Dmytro] Thank you for suggestion, I will add this to the next version. The XML example below presents the configuration of the next service in the= uCPE, where: vSW(LAN), vSW(WAN), vSW(Service) - virtual switches; l1,l2,l3= ,l4 - virtual links; VMs represent PNFs (Physical Network Fuctions) that co= uld be bootstrapped with 0day config/license. =20 +--------+ +-------------+ +------------+ |vSW(LAN)|--l2--|VNF-vFirewall|--l3--| | +--------+ +-------------+ | | +--------+ +-------------+ |vSW(Service)| |vSW(WAN)|--l1--| VNF_vCPE |--l4--| | +--------+ +-------------+ +------------+ =20 ucpe1 l1 l2 l3 l4 lan 10 l2p10 l2 service 10 l3p10 l3 11 l4p10 l4 wan 10 l1 VNF-vCPE 1 l1p1 l1 2 l4p2 l4 2048 2 1 http://192.168.2.1/vCPE-x86.qcow2 https://192.168.2.1/vCPE-day0.iso /config.rom hostname IETF-vCPE ipaddress 192.168.1.2 255.255.255.0 VNF-vFirewall 1 l3p1 l3 2 l2p2 l2 2048 2 1 http://192.168.2.1/vFirewall-x86.qcow2 https://192.168.2.1/vFirewall-day0.iso /config.rom hostname vFirewall ipaddress 192.168.1.3 255.255.255.0 Why is CPU defined as a string? And what does =E2=80=9CAmount of cpus=E2=80= =9D mean? Number of CPUs? Same for RAM. [Dmytro] Yes, it is better to set int. Yes Number of CPUs. It will be fixed. Also VMs have images and storage. If your storage is an image, where is the= storage (disk) definition?=C2=A0 [Dmytro] storage is a list where items are locations of the iso/qcow2/(for example v= di)". further the mapping logic creates a disk based on the image location. We could have multiple storages, thus multiple disks. (This one should be m= odified. Thank you for suggestion. For example we may add type of the disk = (for example IDE). Again, definition of CPUs, RAM, storage belong in a VNF Descriptor (VNFD), = not in a service model. One needs that information at the time of instantia= tion of a VNF, not at the time of turning up a service. [Dmytro] We could talk about VNFD, NSD, Forwarding graphs. But uCPE that exists nowa= days, all of them are following this way?=C2=A0 >Besides, how is the configuration of a uCPE device for a VNF different fro= m configuration of a VNF in a provider Network Function Virtualization Infr= astructure (NFVI) like OpenStack or VMware VIO? [Dmytro] Modern uCPE support netconf. And if you go to the YANG RFC6020 you will fin= d the next statement: =C2=A0=C2=A0 "YANG is a data modeling language used to model configuration = and =C2=A0=C2=A0 state data manipulated by the Network Configuration Protocol =C2=A0=C2=A0 (NETCONF), NETCONF remote procedure calls, and NETCONF notific= ations." When we talk about Openstack it is YAML, not YANG.=C2=A0 [mj] If I give you a YANG model to configure OpenStack, tell me how would t= hat be different from configuring a uCPE? [Dmytro] The question that you may face is how you are going to configure with YANG = modle for Openstack the=C2=A0 uCPE when you have Ports and Swithes to confi= gure and variables that you want to pass to the uCPE VNF?=C2=A0 >And would you not need to enable the service on the provider side to make = the services running on the uCPE functional? [Dmytro] Indeed, to manage the uCPE located on the client side we need to enable the= provider side. The presented model is this actually "sits" in orchestaror = that is located on the provider side. In the draft it is mentioned that it = is "network service yang model- NSYM" that is in the orchestrator (accordin= g to the rfc8199). [mj] By sitting in the orchestrator, you have not defined how the service o= n the provider side is enabled. [Dmytro] Yes it is not defined. I don't think this is a part to define in this draft= as this darft is related to the uCPE management.(i.e. creation of the uCPE= service) that may be connected for example to the 1/10G Internet link of I= SP. >There is significant amount of work that has been done in ETSI on the conf= iguration and management of VNF and NS. Authors should spend some time goin= g through the specifications specified by ETSI to make sure they are not re= -specifying work that has been done there, and instead see how they could a= ugment the work that has already been defined. [Dmytro] The uCPE management mechanism(in the service provider network service orche= strator)=C2=A0 may involve not only YANG modules but also the speficic logi= c written in programming languages. The proposed organisation of yang model= is a solution that provides the best fit for combination (YANG modules + s= pecific logic written in python for example )=C2=A0 to manage different exi= sting NFVIs in the uCPE (by the orchestrator). [mj] IETF does not specify implementation or logic written in a programming= language. [Dmytro] Yes. It can specify the YANG model. And based on the YANG model there will = be logic written. So the YANG model should be chosen wisely by taking into = account the work that needs to be done after. In the case of uCPE, the mapping (w/wo additinal logic) of "variables " bet= ween service yang modules (in the orchestrator) and NETCONF payload(that is= sent to the uCPE) will be more complex (requires additional transformation= s in the logic) with generic approach, then the solution presented in the I= D, that is tailored to the uCPE.Therefore I find the proposed solution as a= stadalone generic approach to manage multiple vendor uCPE that appears to = be a particular case tailored for uCPE NFVIs that may be not nesseraly foll= ows RFC8345. I would be pleased if you could comment this. [mj] To me this sounds like an implementation level detail for a uCPE. Agai= n, not something that IETF standardizes.=C2=A0 [Dmytro] There are implementation details for each uCPE. And those are not covered b= y the document. The YANG model should be chosen such that in the future imp= lementators would have less pain to integrate the YANG model with logic. >Authors can start by going through IFA010,=C2=A0 IFA011, IFA014, and its Y= ANG specification in SOL006. [Dmytro] I would like to draw your attention that these documents seems to be direct= ed to the generic solution including also cloud environment, that brings a = lot of complexity. There is some difference between cloud and client site. For example, case for VNFD, in the cloud we need to have flavours, differen= t VDUs For VNFD, to change the VM capacities according to the load as we ha= ve the extendible infrastructure. The ucpe has limited resources, not as a cloud infrastructure in the data c= enter. [mj] Define a single flavor in case of uCPE and keep it simple. For example, in the case of NSD: NSD includes the VLD that defines Virtual = Links. But in the uCPE case you may have virtual links + virtual switches t= hat are not part of the NSD defined in the ETSI. [Dmytro] Why flavors are needed if the idea is not appropriate to the uCPE)fixed con= figuration)? [mj] But you are allowed to define more than 2 links. Why do you need to de= fine a switch? Links have 2 termination points. They interconnect switches with VMs/Physic= al Ports. For example, i'm not avare of VNFD that brings option of (0day configuratio= n)/bootstrap for VNF. Moreover in the proposed model there is a possibility= to set variables that will be substituted in the ".iso" bootstrap image (e= x.cloudinit) that is assigned to the VM in the uCPE. [mj] That is considered part of the workflow. Your workflow engine will all= ow you to set variables that are substituted in the ISO image or when the i= mage boots up. [Dmytro] This YANG model allows to pass variables to the workflow. I do not see anyt= hing wrong with that if we consider this YANG model as management layer of = uCPE. Thus the generic solution of ETSI leads to more complex implementations of = the code that is responsible for mapping between YANG/XML when the solution= proposed in the Inernet Draft is tailored to the uCPE use-case and should = bring the simplisity when developping the mapping logic and inroduce featur= es that are not presented by ETSI. The Internet Draft also defines the term uCPE that is not defined at IETF y= et. [mj] I do not think this is the right WG or even the right body to standard= ize this model. [Dmytro]Than you for your comment. Mahesh Jethanandani mailto:mjethanandani@gmail.com >>On Sep 5, 2019, at 9:02 AM, Dmytro Shytyi = wrote: >>Dear All, >>Please find the updated version of the VYSM Internet Draft(v0.2). >>The new version of draft introduces an extension of the yang model define= d in previous version. From now the VYSM supports (0day configuration)/(boo= tstrap) of the VNFs hosted in the uCPE. >>With 0day configuration in the uCPE we can setup minimal required configu= ration of vRouter (such as ip address, hostname,etc..), SD-WAN (address of = the SD-WAN manager, dhcp activation, etc..), etc.. >>Details: >>A new version of I-D, draft-shytyi-netmod-vysm-02.txt\A0 >>has been successfully submitted by Dmytro Shytyi and posted to the\A0 >>IETF repository.\A0 >>Name:\A0\A0\A0\A0\A0\A0\A0\A0draft-shytyi-netmod-vysm\A0 >>Revision:\A0\A0\A0\A002\A0 >>Title:\A0\A0\A0\A0\A0\A0\A0\A0Virtualization YANG Servise Model (VYSM)\A0 >>Document date:\A0\A0\A0\A02019-09-04\A0 >>Group:\A0\A0\A0\A0\A0\A0\A0\A0Individual Submission\A0 >>Pages:\A0\A0\A0\A0\A0\A0\A0\A010\A0 >>URL: https://www.ietf.org/internet-drafts/draft-shytyi-netmod-vysm-02.txt= /A0 >>Status: https://datatracker.ietf.org/doc/draft-shytyi-netmod-vysm//A0 >>Htmlized: https://tools.ietf.org/html/draft-shytyi-netmod-vysm-02/A0 >>Htmlized: https://datatracker.ietf.org/doc/html/draft-shytyi-netmod-vysm/= A0 >>Diff: https://www.ietf.org/rfcdiff?url2=3Ddraft-shytyi-netmod-vysm-02\A0 >>Abstract:\A0 >> >>This document provides a specification of the Virtual Network\A0 >> >>Functions YANG Service Model (VYSM). The VNF YANG Service Model\A0 >> >>serves as a base framework for managing an universal Customer-\A0 >> >>Premises Equipment (uCPE) NFV subsystem from the Orchestrator.\A0 >>>> >>>># # # : Dmytro Shytyi [mailto:mailto:ietf.dmytro@shytyi.net] >>>># # # # : 2019# 8# 28#\A0 21:46 >>>># # # : Robert Varga ; Qin Wu >>>># # : netmod >>>># # : Re: [netmod] New Version draft-shytyi-netmod-vysm-02.txt as Worki= ng Group document. >>>> >>>>Hello, >>>> >>>>Please find comments inline. >>>>>On 27/08/2019 18:03, Dmytro Shytyi wrote: >>>>>> Dear All, >>>>>>\A0 >>>>>> I am one of the authors of ID VYSM and I would like to draw your >>>>>> attention to the evolution of the >>>>>> draft\A0https://http://www.ietf.org/internet-drafts/draft-shytyi-net= mod-vysm-01.txt. >>>>>> Recently we produced (but did not submitted yet) a new version of ID >>>>>> (02) and I beleive it fits the netmod working group. >>>>>>\A0 >>>>>> We would be gratefull if you could suggest if the new version(02) of= the >>>>>> document\A0 could become an official work item of the WG? >>>>>> \A0 \A0 \A0 If yes, could you please indicate which modifications mu= st be done >>>>>> in the document before submition. >>>>>\A0 >>>>>Hmm, looking over the model, it would seem there is quite a bit of >>>>>overlap with RFC8345 -- to the point I believe the model could be >>>>>formulated in terms of RFC8345 specialization: >>>>First of all I would like to thank you for this comment.\A0 >>>>-Dmytro >>>>>virtualization -> networks/network >>>>>\A0 >>>>>device/links/interfaces/switches/vms are probably a mix of >>>>>node/termmination-point/link extensions with conjunction with >>>>>supporting-{topology,node,link}. >>>>I can imagine mapping: >>>>virtualization (ID) -> networks/network (RFC 8345) >>>>links (ID)- >link;(RFC 8345) >>>>ports (ID)-> termination points;(RFC 8345) >>>>But still.. it seems here we have to create extension of the model prop= osed in RFC 8345. >>>>Precisely for node (RFC 8345) we may add types (switches, vms) and fute= r add leafs /listsfor type if required (ex: #RAM,#vCPUs and other leafs for= VMs) >>>>-Dmytro >>>>>How would the draft relate to RFC8345? Should it perhaps call out it i= s >>>>>a different take on the similar problem, specialized to a particular >>>>>use-case? >>>>One can suggest that\A0 in the RFC8345 Figure 1, the block "service Top= ology model" can include the proposed in the draft network service descript= or with appropriate modification of mapping according to the RFC8345.. >>>> >>>>Meanwhile I find that the proposed solution(ID) try to solve the proble= m descibed below: >>>> >>>>The uCPE management mechanism may involve not only YANG modules but\A0 = also the speficif logic written in programming languages. The proposed orga= nisation of yang model is an attempt to find the best fit\A0 for combinatio= n (YANG modules + specific logic written in python for example )\A0 to mana= ge different existing NFVIs in the uCPE (by the orchestrator). >>>> >>>>In the case of uCPE, the mapping (w/wo additinal logic) of "variables "= between service yang modules (in the orchestrator) and NETCONF payload(tha= t is sent to the uCPE) will be more complex (requires additional transforma= tions in the logic) with generic approach, then the solution presented in t= he ID, that is tailored to the uCPE.\A0 >>>> >>>>Therefore I find the proposed solution as a stadalone generic approach = to manage multiple vendor uCPE that appears to be a particular case tailore= d for uCPE NFVIs that may be not nesseraly follows RFC8345. I would be plea= sed if you could comment this. >>>> >>>>-Dmytro >>>>>Regards, >>>>>Robert (with RFC8345 co-author hat on) >>>>>+1, in addition, I am wondering whether this is something related to o= verlay topology model, if yes, how it is different from DC Fabric topology = model defined in RFC8542?\A0 >>>>>-Qin\A0 >>>>Thank you for your comment. The RFC8542 condisers PODs in the DC networ= k. uCPE is located on the customer site. if we consider that uCPE is A POD = (with links and nodes like VMs and swithces) then in the RFC8542 describes = different PODs in the network that are interconnected with links. The yang = model proposed in the ID ifocuses only on the uCPE interiour network servic= e, not the interconnection between the uCPEs. Aslo, I explained the differe= nce about extension neded for type of nodes,vms leafs and furter complexity= in the mapping logic in the reponce to Robert. >>>>-Dmytro >>>> >>>>[Qin]:So you focus on interconnection between local vPE and remote vPE? >>>[Dmytro]: >>>Thank you for this question. It seems that the next version of draft sho= uld include the explanation of the uCPE interiour network service. >>>Example: We can have multiple VMs instantiated in the uCPE (vFW,vRouter/= vCPE,SD-WAN). With support of links and swithes\A0 VMs may create a service= chains. >>>Example of service chains: >>>1)WAN--vRouter(vCPE)-link-uCPEvSW -link2-vFirewall-LAN >>>2)WAN--SDWAN--vFirewall--LAN >>>>It is not clear whether we should distinguish VM from switch. In my und= erstanding, Upon VNF is instantiated, there is no difference between virtua= l and physical worlds. >>>[Dmytro]: >>>The VM/VNF in the uCPE could be a vROuter or Vfirewall or an SD-WAN that= is not a default part of virtual network resources of the uCPE (chapter 3 = in the ID). >>>The switch (ex. Open vSwith) in the uCPE is a default part of uCPE netwo= rk virtual resources (chapter 3 in the ID). >>>Thus we need to distingish swithes and VNFs to not to mix uCPE network v= irtual resources and VNFs. >>>Another reason why the destingishing is required: because VM and SW have= different device-attributes. SW does not require VNFD attributtes. >>>If we do not distinguish nodes, and only extend the grouping "device att= ributes" for required attributes the switch will have the properties that a= re\A0 unused leafs which represent the VM-device-attributes. >>>>VNF lifecycle management is separated from topology construction, wrong= ? >>>[Dmytro]: >>>a) In case of the NFVIs uCPE the same High Level interface allows to con= figure both topology construction and VM lifecycle management in the same t= ransaction. >>>b) We can not activate Network Service Descriptor without consituent VM = node information. At the moment of NSD activation we already have to set th= e VM node information such as VM capabilities that can be created (previosl= y)/(at the moment of configuration of NSD) but have to be a part of the net= work service descriptor at the moment of activation. >>>[Dmytro] >>>The Internet Draft also defines the term uCPE that is not defined at IET= F yet. >>>_______________________________________________ >>>netmod mailing list >>>mailto:netmod@ietf.org >>>https://www.ietf.org/mailman/listinfo/netmod >> ------=_Part_628155_455362716.1569181315799 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable =
Hello Mahesh,
I would like to thank you for your commen= ts.

---- On Fri, 06 Sep 2= 019 03:43:05 +0200 Mahesh Jethanandani <mjethanandani@gmail.com> wrote -= ---

Hi Dmytro,

First of all, I find the discussion within the netmod W= G as just the wrong place to have this discussion. You will be hard pressed= to find too many people who can give you critical feedback on the model in= this WG.
[Dmytro] Thank = you for this suggestion.

See inline with [mj]
On Sep 5, 2019, at 2:03 PM, = Dmytro Shytyi <ietf.dmytro@shytyi.net> wrote:

[Dmytro]
Hello Mahesh Jethanandani,
Thank you for your comment.
Please find answers inline.

>I find the representation of a se= rvice model in this draft for a uCPE as too simple. In reality, on a uCPE, = you could be running a Network Service (NS), which is composed of multiple = VNFs interconnected together. This service model does not address such a co= nfiguration.
[Dmytro]
This service model presented in the dra= ft supports N VMs in the NS and addreses configuration with multiple VMs an= d switches with plenty of links. It is well tested (with service chained VM= s) on equipent from different well known suppliers. The idea to have comple= x flexible service in the network service orchestrator for uCPE.
in the yang model we have list (marked by pyang= with "*") of VMs where the key is name of the vm, thus you may define as m= uch VM as you wish.

[mj] You have introduced concept of interfaces, = ports, and switches that does not exist in the NFV world. VNFs have virtual= links and connection points. There is no (physical) port or interface that= one connects to in a VNF. It might exist on the server on which the VM run= s but not in a VNF or a virtualization instance.
[Dmytro] The uCPEs have these items. Therefo= re the model that was created was created for uCPE management part. I will = adjust the draft regarding your comment. 
Example of 2 VMs= that are service chained (swLAN-VM1-swService-VM2-swWAN)

   &= nbsp;  +--rw vms* [vm]
  = ;            &n= bsp;       +--rw vm    &n= bsp;        string
<= div class=3D"">          =             +--rw po= rts* [port]
    &nb= sp;            =      |  +--rw port    string
       &nb= sp;            =   |  +--rw name?   string
           &n= bsp;          |  +--rw li= nk?   -> ../../../links/link
            =           +--rw ram? &nbs= p;         string
         &n= bsp;            +--r= w cpu?           string
      &nbs= p;            &= nbsp;  +--rw storages* [id]
 =             &nb= sp;        |  +--rw id  &= nbsp;       string
           = ;           |  +--rw= location?   string
 &nb= sp;            =         +--rw day0-config
=
         = ;            &n= bsp;   +--rw location?        = string
     &n= bsp;            = ;       +--rw day0-var-path?   stri= ng
      =             &nb= sp;      +--rw variable* [name]
         &nb= sp;            =       +--rw name     string
       = ;            &n= bsp;        +--rw value?   str= ing


So basically  the list "+--rw w= ms* [vm]" can be represented/"expanded" in this way where the names and num= ber ov vms(N) is set by user:

 >>>>>   &nb= sp;   +--rw vm1        &n= bsp;    string
  &n= bsp;                    |=      +--rw ports* [port]
                    &nbs= p;  |     |  +--rw port    string
           = ;            |     |  +--= rw name?   string
  &nbs= p;                    |&n= bsp;    |  +--rw link?   -> ../../../links/link=
          &nb= sp;            |     +--rw ram= ?           string
            &nb= sp;          |     +--rw cpu? =           string
              &nb= sp;        |     +--rw storages* [id]
           =            |     |  +--r= w id          string
             = ;          |     |  +--rw loca= tion?   string
    =                    | = ;    +--rw day0-config
 =                     &nbs= p;|     |  +--rw location?     = ;   string
    &nbs= p;                  |  &n= bsp;  |  +--rw day0-var-path?   string
               =        |     |  +--rw variable* [n= ame]
         =              |     |&nbs= p;    +--rw name     string
              &n= bsp;        |     |   &nb= sp; +--rw value?   string
>= ;>>>>        +--rw vm2   &nb= sp;         string
               =        |     +--rw ports* [port]
            &nb= sp;          |     |  +--rw po= rt    string
  &nbs= p;                    |&n= bsp;    |  +--rw name?   string
                &= nbsp;      |     |  +--rw link? &nb= sp; -> ../../../links/link
  &n= bsp;                    |=      +--rw ram?       &nb= sp;   string
    &n= bsp;                  |  =    +--rw cpu?        &nbs= p;  string
      &n= bsp;                |    =  +--rw storages* [id]
   = ;                    |&nb= sp;    |    +--rw id      = ;    string
   = ;                    |&nb= sp;    |  +--rw location?   string
<= /div>
               = ;        |     +--rw day0-config
            &nbs= p;          |     |    +-= -rw location?        string
              &n= bsp;        |     |  +--rw day0-var= -path?   string
   =                    |&nbs= p;    |  +--rw variable* [name]
                  &nbs= p;    |     |     +--rw name&n= bsp;    string
  &n= bsp;                    |=      |     +--rw value?   stri= ng
      =             &nb= sp;     ....
&= nbsp;                    = |                    &nb= sp; 
 >>>>>&nb= sp;      +--rw vmN     &n= bsp;       string
           =              &n= bsp;   +--rw ports* [port]
            =              &n= bsp;  |  +--rw port    string
<= /div>
         =              &n= bsp;     |  +--rw name?   string
       = ;            &n= bsp;        |  +--rw link? &nb= sp; -> ../../../links/link
 &nb= sp;            =              &n= bsp;+--rw ram?           = string
     &n= bsp;            = ;          +--rw cpu? &nb= sp;         string
         &= nbsp;            &nb= sp;     +--rw storages* [id]
<= div class=3D"">          =              &n= bsp;    |  +--rw id     &= nbsp;    string
 &n= bsp;            = ;             &= nbsp;|  +--rw location?   string
           =              &n= bsp;   +--rw day0-config
            &n= bsp;            &nbs= p;     +--rw location?    &nbs= p;   string
   = ;            &n= bsp;            = ;   +--rw day0-var-path?   string
<= div class=3D"">          =             &nb= sp;        +--rw variable* [name]
       &nb= sp;            =              &n= bsp;+--rw name     string
           &n= bsp;            = ;          +--rw value? &= nbsp; string

[mj] I understand how you instantiate multiple VMs. Wha= t I do not understand is for example, your representation of a link. Curren= tly, it points to a link definition within the same Virtualization instance= . How does that tell me what is it connected to?

[Dmytro] Thank you for = suggestion, I will add this to the next version.
The XML example below presents the configuration of the =
next service in the uCPE, where: vSW(LAN), vSW(WAN), vSW(Service) - virtual=
 switches; l1,l2,l3,l4 - virtual links; VMs represent PNFs (Physical Networ=
k Fuctions) that could be bootstrapped with 0day config/license.
 =20
+--------+      +-------------+      +------------+
|vSW(LAN)|--l2--|VNF-vFirewall|--l3--|            |
+--------+      +-------------+      |            |
+--------+      +-------------+      |vSW(Service)|
|vSW(WAN)|--l1--|   VNF_vCPE  |--l4--|            |
+--------+      +-------------+      +------------+
    =20
  <ucpe xmlns=3D"urn:ietf:params:xml:ns:yang:ietf-ucpe">
      <name>ucpe1</name>
      <links>
        <link>l1</link>
      </links>
      <links>
        <link>l2</link>
      </links>
      <links>
        <link>l3</link>
      </links>
      <links>
        <link>l4</link>
      </links>
      <switches>
        <switch>lan</switch>
        <ports>
          <port>10</port>
          <name>l2p10</name>
          <link>l2</link>
        </ports>
      </switches>
      <switches>
        <switch>service</switch>
        <ports>
          <port>10</port>
          <name>l3p10</name>
          <link>l3</link>
        </ports>
        <ports>
          <port>11</port>
          <name>l4p10</name>
          <link>l4</link>
        </ports>
      </switches>
      <switches>
        <switch>wan</switch>
        <ports>
          <port>10</port>
          <link>l1</link>
        </ports>
      </switches>
      <vms>
        <vm>VNF-vCPE</vm>
        <ports>
          <port>1</port>
          <name>l1p1</name>
          <link>l1</link>
        </ports>
        <ports>
          <port>2</port>
          <name>l4p2</name>
          <link>l4</link>
        </ports>
        <ram>2048</ram>
        <cpu>2</cpu>
        <storages>
          <id>1</id>
          <location>http://192.168.2.1/vCPE-x86.qcow2</location>
        </storages>
        <day0-config>
          <location>https://192.168.2.1/vCPE-day0.iso</location>
          <day0-var-path>/config.rom</day0-var-path>
          <variable>
            <name>hostname</name>
            <value>IETF-vCPE</value>
          </variable>
          <variable>
            <name>ipaddress</name>
            <value>192.168.1.2 255.255.255.0</value>
          </variable>
        </day0-config>
      </vms>
      <vms>
        <vm>VNF-vFirewall</vm>
        <ports>
          <port>1</port>
          <name>l3p1</name>
          <link>l3</link>
        </ports>
        <ports>
          <port>2</port>
          <name>l2p2</name>
          <link>l2</link>
        </ports>
        <ram>2048</ram>
        <cpu>2</cpu>
        <storages>
          <id>1</id>
          <location>http://192.168.2.1/vFirewall-x86.qcow2</location=
>
        </storages>
        <day0-config>
          <location>https://192.168.2.1/vFirewall-day0.iso</location=
>
          <day0-var-path>/config.rom</day0-var-path>
          <variable>
            <name>hostname</name>
            <value>vFirewall</value>
          </variable>
          <variable>
            <name>ipaddress</name>
            <value>192.168.1.3 255.255.255.0</value>
          </variable>
        </day0-config>
      </vms>
    </ucpe>

Why is CPU defined as a string? And what does =E2=80=9CAmou= nt of cpus=E2=80=9D mean? Number of CPUs? Same for RAM.
[Dmytro]
Yes, it is better= to set int. Yes Number of CPUs. It will be fixed.
Also VMs have images and storage. If your storage is an image, where is the storage (d= isk) definition? 
[= Dmytro]
<= div>
storage is a list where items are locations of the iso/q= cow2/(for example vdi)". further the mapping logic creates a disk based on = the image location.
We could have multiple storages, thus mul= tiple disks. (This one should be modified. Thank you for suggestion. For ex= ample we may add type of the disk (for example IDE).

Again, definit= ion of CPUs, RAM, storage belong in a VNF Descriptor (VNFD), not in a servi= ce model. One needs that information at the time of instantiation of a VNF,= not at the time of turning up a service.

[Dmytro]
We could talk about VN= FD, NSD, Forwarding graphs. But uCPE that exists nowadays, all of them are = following this way? 
<= blockquote style=3D"border-left: 1.0px solid rgb(204,204,204);padding-left:= 6.0px;margin: 0.0px 0.0px 0.0px 5.0px;">

>Besides, how i= s the configuration of a uCPE device for a VNF different from configuration= of a VNF in a provider Network Function Virtualization Infrastructure (NFV= I) like OpenStack or VMware VIO?
[Dmytr= o]
Modern uCPE support= netconf. And if you go to the YANG RFC6020 you will find the next statemen= t:
   "YANG is a data modelin= g language used to model configuration and
   state data manipulated by the Network Configuration Prot= ocol
   (NETCONF), NETCONF re= mote procedure calls, and NETCONF notifications."
When we talk about Openstack it is YAML, not YANG. 

= [mj] If I give you a YANG model to configure OpenStack, tell me how would t= hat be different from configuring a uCPE?

[Dmytro]
The question that you = may face is how you are going to configure with YANG modle for Openstack th= e  uCPE when you have Ports and Swithes to configure and variables tha= t you want to pass to the uCPE VNF? 
<= div class=3D"">
>And would you not n= eed to enable the service on the provider side to make the services running= on the uCPE functional?
[Dmytro]
Indeed, to manage the uCPE located on the cl= ient side we need to enable the provider side. The presented model is this = actually "sits" in orchestaror that is located on the provider side. In the= draft it is mentioned that it is "network service yang model- NSYM" that i= s in the orchestrator (according to the rfc8199).

[mj] By sitting in= the orchestrator, you have not defined how the service on the provider sid= e is enabled.

=
[Dmytro]
Yes it is not defined. I don't think this is= a part to define in this draft as this darft is related to the uCPE manage= ment.(i.e. creation of the uCPE service) that may be connected for example = to the 1/10G Internet link of ISP.

>There is si= gnificant amount of work that has been done in ETSI on the configuration an= d management of VNF and NS. Authors should spend some time going through th= e specifications specified by ETSI to make sure they are not re-specifying = work that has been done there, and instead see how they could augment the w= ork that has already been defined.
[Dmy= tro]
The uCPE manageme= nt mechanism(in the service provider network service orchestrator)  ma= y involve not only YANG modules but also the speficic logic written in prog= ramming languages. The proposed organisation of yang model is a solution th= at provides the best fit for combination (YANG modules + specific logic wri= tten in python for example )  to manage different existing NFVIs in th= e uCPE (by the orchestrator).

[mj] IETF does not specify implementat= ion or logic written in a programming language.
=
[Dmytro]
Yes. It can specify the= YANG model. And based on the YANG model there will be logic written. So th= e YANG model should be chosen wisely by taking into account the work that n= eeds to be done after.

In th= e case of uCPE, the mapping (w/wo additinal logic) of "variables " between = service yang modules (in the orchestrator) and NETCONF payload(that is sent= to the uCPE) will be more complex (requires additional transformations in = the logic) with generic approach, then the solution presented in the ID, th= at is tailored to the uCPE.Therefore I find the proposed solution as a stad= alone generic approach to manage multiple vendor uCPE that appears to be a = particular case tailored for uCPE NFVIs that may be not nesseraly follows R= FC8345. I would be pleased if you could comment this.
<= /div>

[mj] To me thi= s sounds like an implementation level detail for a uCPE. Again, not somethi= ng that IETF standardizes. 

[Dmytro]
There are implementatio= n details for each uCPE. And those are not covered by the document. The YAN= G model should be chosen such that in the future implementators would have = less pain to integrate the YANG model with logic.

<= div class=3D"x_-155371766zmail_extra">
=

&= gt;Authors can start by going through IFA010,  IFA011, IFA014, and its= YANG specification in SOL006.
[Dmytro]=
I would like to draw = your attention that these documents seems to be directed to the generic sol= ution including also cloud environment, that brings a lot of complexity. Th= ere is some difference between cloud and client site.
<= div class=3D"">For example, case for VNFD, in the cloud we need to have fla= vours, different VDUs For VNFD, to change the VM capacities according to th= e load as we have the extendible infrastructure.
The ucpe has limited resources, not as a cloud infrastructure in = the data center.
[mj] Define a single flavor in case of uCPE and kee= p it simple.
For example, in the case of NSD: NSD includes th= e VLD that defines Virtual Links. But in the uCPE case you may have virtual= links + virtual switches that are not part of the NSD defined in the ETSI.=
[Dmytro]
Why flavors are needed if the idea is not appropriate to the uC= PE)fixed configuration)?

[mj] But you are allowed to= define more than 2 links. Why do you need to define a switch?
Links have 2 termination= points. They interconnect switches with VMs/Physical Ports.

=
For example, i'm not avare of VNFD that brings option of (0= day configuration)/bootstrap for VNF. Moreover in the proposed model there = is a possibility to set variables that will be substituted in the ".iso" bo= otstrap image (ex.cloudinit) that is assigned to the VM in the uCPE.

[mj] That is considered part o= f the workflow. Your workflow engine will allow you to set variables that a= re substituted in the ISO image or when the image boots up.
=
[Dmytro]
This YANG model allo= ws to pass variables to the workflow. I do not see anything wrong with that= if we consider this YANG model as management layer of uCPE.
Thus the generic solution of ETSI leads to more complex implementati= ons of the code that is responsible for mapping between YANG/XML when the s= olution proposed in the Inernet Draft is tailored to the uCPE use-case and = should bring the simplisity when developping the mapping logic and inroduce= features that are not presented by ETSI.
The Internet Draft also defines the term uCPE that is not defined at IET= F yet.

[mj] I do not think this is the right WG or even the right bo= dy to standardize this model.
[Dmytro]Than you for your comment.

Mahesh Jethanandani
mjethanandani@gmail.c= om


>>On Sep 5, 2019, at= 9:02 AM, Dmytro Shytyi <ietf.dmytro@shytyi.net> wrote:
>>Dear All,
>>Please find the updated version of the VYSM Internet Draft(v0.2).=
>>The new version of draft intro= duces an extension of the yang model defined in previous version. From now = the VYSM supports (0day configuration)/(bootstrap) of the VNFs hosted in th= e uCPE.
>>With 0day configuration= in the uCPE we can setup minimal required configuration of vRouter (such a= s ip address, hostname,etc..), SD-WAN (address of the SD-WAN manager, dhcp = activation, etc..), etc..
>>Detai= ls:
>>A new version of I-D, draft= -shytyi-netmod-vysm-02.txt\A0
>>h= as been successfully submitted by Dmytro Shytyi and posted to the\A0
>>IETF repository.\A0
>>Name:\A0\A0\A0\A0\A0\A0\A0\A0draft-shytyi-netmod= -vysm\A0
>>Revision:\A0\A0\A0\A00= 2\A0
>>Title:\A0\A0\A0\A0\A0\A0\A= 0\A0Virtualization YANG Servise Model (VYSM)\A0
>>Document date:\A0\A0\A0\A02019-09-04\A0
>>Group:\A0\A0\A0\A0\A0\A0\A0\A0Individual Submissi= on\A0
>>Pages:\A0\A0\A0\A0\A0\A0\= A0\A010\A0
>>URL: https://www.ietf.org/internet-drafts/draft-shytyi-ne= tmod-vysm-02.txt\A0
>>Status:= https://datatracker.ietf.org/doc/draft-shytyi-= netmod-vysm/\A0
>>Htmlized: <= a class=3D"" href=3D"https://tools.ietf.org/html/draft-shytyi-netmod-vysm-0= 2/A0" target=3D"_blank">https://tools.ietf.org/html/draft-shytyi-netmod-vys= m-02\A0
>>Htmlized: https://datatracker.ietf.org/doc/html/draft-shytyi-= netmod-vysm\A0
>>Diff: https://www.ietf.org/rfcdiff?url2=3Ddraft-shytyi= -netmod-vysm-02\A0
>>Abstract= :\A0
>>
>>This document provides a specification of the Virtual Ne= twork\A0
>>
<= div class=3D"">>>Functions YANG Service Model (VYSM). The VNF YANG Se= rvice Model\A0
>>
<= /div>
>>serves as a base framework for managing an uni= versal Customer-\A0
>>
>>Premises Equipment (uCPE) NFV subsystem= from the Orchestrator.\A0
>>>= >
>>>># # # : Dmytro Shy= tyi [mailto:ietf.dmytro@shytyi.net]
>= ;>>># # # # : 2019# 8# 28#\A0 21:46
>>>># # # : Robert Varga <nite@hq.sk>; Qin Wu <bill.wu@huawei.com>
>>>># # : netmod <= netmod@ietf= .org>
>>>># # : Re: = [netmod] New Version draft-shytyi-netmod-vysm-02.txt as Working Group docum= ent.
>>>>
>>>>Hello,
>>>>
>>>>Ple= ase find comments inline.
>>>&= gt;>On 27/08/2019 18:03, Dmytro Shytyi wrote:
>>>>>> Dear All,
>>>>>>\A0
>&= gt;>>>> I am one of the authors of ID VYSM and I would like to = draw your
>>>>>> atte= ntion to the evolution of the
>>&= gt;>>> draft\A0https://www.ietf.= org/internet-drafts/draft-shytyi-netmod-vysm-01.txt.
>>>>>> Recently we produced (but did no= t submitted yet) a new version of ID
&g= t;>>>>> (02) and I beleive it fits the netmod working group.=
>>>>>>\A0
>>>>>> We would be gratefull = if you could suggest if the new version(02) of the
>>>>>> document\A0 could become an official w= ork item of the WG?
>>>>>= ;> \A0 \A0 \A0 If yes, could you please indicate which modifications mus= t be done
>>>>>> in t= he document before submition.
>>&= gt;>>\A0
>>>>>Hmm,= looking over the model, it would seem there is quite a bit of
>>>>>overlap with RFC8345 -- to the = point I believe the model could be
>= >>>>formulated in terms of RFC8345 specialization:
>>>>First of all I would like to thank = you for this comment.\A0
>>>&g= t;-Dmytro
>>>>>virtualiz= ation -> networks/network
>>&g= t;>>\A0
>>>>>devic= e/links/interfaces/switches/vms are probably a mix of
<= div class=3D"">>>>>>node/termmination-point/link extensions = with conjunction with
>>>>&= gt;supporting-{topology,node,link}.
>= ;>>>I can imagine mapping:
>= ;>>>virtualization (ID) -> networks/network (RFC 8345)
>>>>links (ID)- >link;(RFC 8345)=
>>>>ports (ID)-> termin= ation points;(RFC 8345)
>>>>= ;But still.. it seems here we have to create extension of the model propose= d in RFC 8345.
>>>>Precisel= y for node (RFC 8345) we may add types (switches, vms) and futer add leafs = /listsfor type if required (ex: #RAM,#vCPUs and other leafs for VMs)
>>>>-Dmytro
<= div class=3D"">>>>>>How would the draft relate to RFC8345? S= hould it perhaps call out it is
>>= ;>>>a different take on the similar problem, specialized to a part= icular
>>>>>use-case?
>>>>One can suggest that\A0 i= n the RFC8345 Figure 1, the block "service Topology model" can include the = proposed in the draft network service descriptor with appropriate modificat= ion of mapping according to the RFC8345..
>>>>
>>>>Mea= nwhile I find that the proposed solution(ID) try to solve the problem desci= bed below:
>>>>
>>>>The uCPE management mechanism may = involve not only YANG modules but\A0 also the speficif logic written in pro= gramming languages. The proposed organisation of yang model is an attempt t= o find the best fit\A0 for combination (YANG modules + specific logic writt= en in python for example )\A0 to manage different existing NFVIs in the uCP= E (by the orchestrator).
>>>&g= t;
>>>>In the case of uCPE,= the mapping (w/wo additinal logic) of "variables " between service yang mo= dules (in the orchestrator) and NETCONF payload(that is sent to the uCPE) w= ill be more complex (requires additional transformations in the logic) with= generic approach, then the solution presented in the ID, that is tailored = to the uCPE.\A0
>>>>
>>>>Therefore I find the proposed= solution as a stadalone generic approach to manage multiple vendor uCPE th= at appears to be a particular case tailored for uCPE NFVIs that may be not = nesseraly follows RFC8345. I would be pleased if you could comment this.
>>>>
>>>>-Dmytro
>= ;>>>>Regards,
>>>&= gt;>Robert (with RFC8345 co-author hat on)
>>>>>+1, in addition, I am wondering whether this is = something related to overlay topology model, if yes, how it is different fr= om DC Fabric topology model defined in RFC8542?\A0
>>>>>-Qin\A0
>>>>Thank you for your comment. The RFC8542 condisers PODs in = the DC network. uCPE is located on the customer site. if we consider that u= CPE is A POD (with links and nodes like VMs and swithces) then in the RFC85= 42 describes different PODs in the network that are interconnected with lin= ks. The yang model proposed in the ID ifocuses only on the uCPE interiour n= etwork service, not the interconnection between the uCPEs. Aslo, I explaine= d the difference about extension neded for type of nodes,vms leafs and furt= er complexity in the mapping logic in the reponce to Robert.
=
>>>>-Dmytro
>>>>
>>>>= ;[Qin]:So you focus on interconnection between local vPE and remote vPE?
>>>[Dmytro]:
>>>Thank you for this question. It seems that the= next version of draft should include the explanation of the uCPE interiour= network service.
>>>Example: = We can have multiple VMs instantiated in the uCPE (vFW,vRouter/vCPE,SD-WAN)= . With support of links and swithes\A0 VMs may create a service chains.
>>>Example of service chains:
>>>1)WAN--vRouter(vCPE)-link-uCPE= vSW -link2-vFirewall-LAN
>>>2)= WAN--SDWAN--vFirewall--LAN
>>>= >It is not clear whether we should distinguish VM from switch. In my und= erstanding, Upon VNF is instantiated, there is no difference between virtua= l and physical worlds.
>>>[Dmy= tro]:
>>>The VM/VNF in the uCP= E could be a vROuter or Vfirewall or an SD-WAN that is not a default part o= f virtual network resources of the uCPE (chapter 3 in the ID).
>>>The switch (ex. Open vSwith) in the uCP= E is a default part of uCPE network virtual resources (chapter 3 in the ID)= .
>>>Thus we need to distingis= h swithes and VNFs to not to mix uCPE network virtual resources and VNFs.
>>>Another reason why the desti= ngishing is required: because VM and SW have different device-attributes. S= W does not require VNFD attributtes.
&g= t;>>If we do not distinguish nodes, and only extend the grouping "dev= ice attributes" for required attributes the switch will have the properties= that are\A0 unused leafs which represent the VM-device-attributes.
>>>>VNF lifecycle management is se= parated from topology construction, wrong?
>>>[Dmytro]:
>>>= ;a) In case of the NFVIs uCPE the same High Level interface allows to confi= gure both topology construction and VM lifecycle management in the same tra= nsaction.
>>>b) We can not act= ivate Network Service Descriptor without consituent VM node information. At= the moment of NSD activation we already have to set the VM node informatio= n such as VM capabilities that can be created (previosly)/(at the moment of= configuration of NSD) but have to be a part of the network service descrip= tor at the moment of activation.
>&g= t;>[Dmytro]
>>>The Internet= Draft also defines the term uCPE that is not defined at IETF yet.
>>>___________________________________= ____________
>>>netmod mailing= list
>>>netmod@ietf.org
>>>https://www.ietf.org/mailman= /listinfo/netmod
>>







=
------=_Part_628155_455362716.1569181315799-- From nobody Sun Sep 22 23:48:54 2019 Return-Path: X-Original-To: netmod@ietfa.amsl.com Delivered-To: netmod@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 91C79120114 for ; Sun, 22 Sep 2019 23:48:52 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -6.897 X-Spam-Level: X-Spam-Status: No, score=-6.897 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_HI=-5, SPF_HELO_NONE=0.001, SPF_NONE=0.001] autolearn=ham autolearn_force=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id Y74ol35oboZP for ; Sun, 22 Sep 2019 23:48:51 -0700 (PDT) Received: from nagasaki.bogus.com (nagasaki.bogus.com [IPv6:2001:418:1::81]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 0BEE71200FE for ; Sun, 22 Sep 2019 23:48:51 -0700 (PDT) Received: from [192.168.0.107] (c-73-202-177-209.hsd1.ca.comcast.net [73.202.177.209]) (authenticated bits=0) by nagasaki.bogus.com (8.15.2/8.15.2) with ESMTPSA id x8N6mh4E067381 for ; Mon, 23 Sep 2019 06:48:50 GMT (envelope-from joelja@bogus.com) X-Authentication-Warning: nagasaki.bogus.com: Host c-73-202-177-209.hsd1.ca.comcast.net [73.202.177.209] claimed to be [192.168.0.107] From: Joel Jaeggli Content-Type: multipart/alternative; boundary="Apple-Mail=_A753307E-A832-4F8F-A071-09D7F60F2B77" Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.11\)) Message-Id: <8918D13C-FEF3-4541-815D-D2E8E5E157E9@bogus.com> Date: Sun, 22 Sep 2019 23:48:36 -0700 To: NETMOD Working Group X-Mailer: Apple Mail (2.3445.104.11) Archived-At: Subject: [netmod] Processing open errata in the the netmod working group X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 23 Sep 2019 06:48:53 -0000 --Apple-Mail=_A753307E-A832-4F8F-A071-09D7F60F2B77 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii Folks, Over the course of this we we intend to process reported errata that we = have outstanding in netmod currently in the queue are the following: = https://www.rfc-editor.org/errata_search.php?rec_status=3D2&wg_acronym=3Dn= etmod&presentation=3Dtable = RFC7950 (5517 ) 10.4.2 = Technical netmod (ops) Rohit R Ranade TEXT 2018-10-08 RFC7950 (5617 ) 14 = Technical netmod (ops) Marek Michalak, Pawel Koch TEXT = 2019-01-30 RFC7950 (5663 ) 14 = Technical netmod (ops) Ebben Aries TEXT 2019-03-18 RFC7950 (5642 ) 9.6.4 = Editorial netmod (ops) Peter Loborg TEXT 2019-02-21 RFC8342 (5514 ) C.1 = Technical netmod (ops) Rohit R Ranade TEXT 2018-10-05 RFC8519 (5762 ) 4.1 = Technical netmod (ops) Qin WU TEXT 2019-06-24 the first 4 concern yang 1.1 5514 concerns nmda, and the last one = concerns the act model. --Apple-Mail=_A753307E-A832-4F8F-A071-09D7F60F2B77 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=us-ascii Folks,

Over= the course of this we we intend to process reported errata that we have = outstanding in netmod

currently in the queue are the following:

https://www.rfc-editor.org/errata_search.php?rec_status=3D2&= ;wg_acronym=3Dnetmod&presentation=3Dtable
RFC7950 (5517)10.4.2Technicalnetmod (ops)Rohit R RanadeTEXT2018-10-08
RFC7950 (5617)14Technicalnetmod (ops)Marek Michalak, Pawel KochTEXT2019-01-30
RFC7950 (5663)14Technicalnetmod (ops)Ebben AriesTEXT2019-03-18
RFC7950 (5642)9.6.4Editorialnetmod (ops)Peter LoborgTEXT2019-02-21
RFC8342 (5514)C.1Technicalnetmod (ops)Rohit R RanadeTEXT2018-10-05
RFC8519 (5762)4.1Technicalnetmod (ops)Qin WUTEXT2019-06-24

the first 4 concern yang 1.1 5514 concerns nmda, and = the  last one  concerns the act model.



= --Apple-Mail=_A753307E-A832-4F8F-A071-09D7F60F2B77-- From nobody Mon Sep 23 01:08:14 2019 Return-Path: X-Original-To: netmod@ietfa.amsl.com Delivered-To: netmod@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 6DA1C12011C for ; Mon, 23 Sep 2019 01:08:12 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.9 X-Spam-Level: X-Spam-Status: No, score=-1.9 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, SPF_HELO_NONE=0.001, SPF_PASS=-0.001] autolearn=ham autolearn_force=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id hsEZ6bXuCF2I for ; Mon, 23 Sep 2019 01:08:11 -0700 (PDT) Received: from mail.tail-f.com (mail.tail-f.com [46.21.102.45]) by ietfa.amsl.com (Postfix) with ESMTP id 111DB12004F for ; Mon, 23 Sep 2019 01:08:11 -0700 (PDT) Received: from localhost (h-46-233.A165.priv.bahnhof.se [46.59.46.233]) by mail.tail-f.com (Postfix) with ESMTPSA id AE89A1AE0115; Mon, 23 Sep 2019 10:08:09 +0200 (CEST) Date: Mon, 23 Sep 2019 10:08:09 +0200 (CEST) Message-Id: <20190923.100809.462896493479149533.mbj@tail-f.com> To: joelja@bogus.com Cc: netmod@ietf.org From: Martin Bjorklund In-Reply-To: <8918D13C-FEF3-4541-815D-D2E8E5E157E9@bogus.com> References: <8918D13C-FEF3-4541-815D-D2E8E5E157E9@bogus.com> X-Mailer: Mew version 6.7 on Emacs 25.2 / Mule 6.0 (HANACHIRUSATO) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Archived-At: Subject: Re: [netmod] Processing open errata in the the netmod working group X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 23 Sep 2019 08:08:13 -0000 Joel Jaeggli wrote: > Folks, > > Over the course of this we we intend to process reported errata that > we have outstanding in netmod I started to go through the list and comment, but then I realized that you probably didn't ask for comments? This was just a FYI? /martin From nobody Mon Sep 23 23:35:11 2019 Return-Path: X-Original-To: netmod@ietfa.amsl.com Delivered-To: netmod@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 0395C120119 for ; Mon, 23 Sep 2019 23:35:10 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -6.896 X-Spam-Level: X-Spam-Status: No, score=-6.896 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_HI=-5, SPF_HELO_NONE=0.001, SPF_NONE=0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id ggOHi1spWY5U for ; Mon, 23 Sep 2019 23:35:08 -0700 (PDT) Received: from nagasaki.bogus.com (nagasaki.bogus.com [IPv6:2001:418:1::81]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 56F80120115 for ; Mon, 23 Sep 2019 23:35:08 -0700 (PDT) Received: from [192.168.0.107] (c-73-202-177-209.hsd1.ca.comcast.net [73.202.177.209]) (authenticated bits=0) by nagasaki.bogus.com (8.15.2/8.15.2) with ESMTPSA id x8O6Z0ki085329 for ; Tue, 24 Sep 2019 06:35:07 GMT (envelope-from joelja@bogus.com) X-Authentication-Warning: nagasaki.bogus.com: Host c-73-202-177-209.hsd1.ca.comcast.net [73.202.177.209] claimed to be [192.168.0.107] From: Joel Jaeggli Content-Type: multipart/alternative; boundary="Apple-Mail=_9E24DAF8-E349-47AB-B3E5-80B663916169" Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.11\)) Message-Id: <4C06B86E-8EC7-4DD0-867B-9FAFEE0F4B9C@bogus.com> Date: Mon, 23 Sep 2019 23:34:53 -0700 To: NETMOD Working Group X-Mailer: Apple Mail (2.3445.104.11) Archived-At: Subject: [netmod] Open Errata 5762 rfc 8519 https://www.rfc-editor.org/errata/eid5762 X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 24 Sep 2019 06:35:10 -0000 --Apple-Mail=_9E24DAF8-E349-47AB-B3E5-80B663916169 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=utf-8 Qin wu wrote in the errata: I am wondering why not set default value for acl-type,e.g., set default = value as "ipv4-acl-type" otherwise, how to determine which field under = which choice will be matched upon and which action should be taken on = them if the opetional parameter type under acl list is not set. Also I want to better understand why acl type is removed from key = indexes of access list and keep it as optional parameter under acl list. = One case I am thinking in my mind is we add a mixed Ethernet, IPv4, and = IPv6 ACL entry when we already have Ethernet ACL entry,IPv4 ACL entry , = we don't need to remove existing ethernet entry and existing IPv4 entry = in the list ("aces") and create a new entry with mixed ethernet, IPv4, = IPv6 ACL, instead, we just add a new identity called = mixed-eth-ipv4-ipv6-acl-type and add a new IPv6 entry. -------- Mahesh Jethanandani replied: This errata should be rejected for the following reason. The whole idea of defining the identities for acl-type was to allow = vendors to specify what capabilities their box is capable of supporting = and then to specify what capabilities the vendors want to support. As = such there is no =E2=80=9Cdefault capability" for every vendor. Besides, = if a device advertises a mixed-eth-ipv4 feature, it is because it can = only support Ethernet and IPv4 ACL combinations, and it cannot support = IPv6 ACL matches. You do not add a capability of IPv6 match on the fly. = It either has it, or it does not. If it does, advertise = mixed-eth-ipv4-ipv6 capability to begin with. The errata proposes a change to the standard and is not correcting an = error in the document. additionaly it not clear why it would be = appraise to set a default acl type. The errata is declined. Thanks Joel --Apple-Mail=_9E24DAF8-E349-47AB-B3E5-80B663916169 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=utf-8 Qin = wu wrote in the errata:


I am wondering why not = set default value for acl-type,e.g., set default value as = "ipv4-acl-type" otherwise, how to determine which field under which = choice will be matched upon and which action should be taken on them if = the opetional parameter type under acl list is not set.

Also I want = to better understand why acl type is removed from key indexes of access = list and keep it as optional parameter under acl list. One case I am = thinking in my mind is we add a mixed Ethernet, IPv4, and IPv6 ACL entry = when we already have Ethernet ACL entry,IPv4 ACL entry , we don't need = to remove existing ethernet entry and existing IPv4 entry in the list = ("aces") and create a new entry with mixed ethernet, IPv4, IPv6 ACL, = instead, we just add a new identity called mixed-eth-ipv4-ipv6-acl-type = and add a new IPv6 entry.

--------

Mahesh Jethanandani = replied:

This errata should be rejected for the following = reason.

The = whole idea of defining the identities for acl-type was to allow vendors = to specify what capabilities their box is capable of supporting and then = to specify what capabilities the vendors want to support. As such there = is no =E2=80=9Cdefault capability" for every vendor. Besides, if a = device advertises a mixed-eth-ipv4 feature, it is because it can only = support Ethernet and IPv4 ACL combinations, and it cannot support IPv6 = ACL matches. You do not add a capability of IPv6 match on the fly. It = either has it, or it does not. If it does, advertise mixed-eth-ipv4-ipv6 = capability to begin with.

The errata proposes a change to the standard and is not = correcting an error in the document.  additionaly it not = clear why it would be appraise to set a default acl = type.

The = errata is declined.

Thanks
Joel


= --Apple-Mail=_9E24DAF8-E349-47AB-B3E5-80B663916169-- From nobody Mon Sep 23 23:38:00 2019 Return-Path: X-Original-To: netmod@ietfa.amsl.com Delivered-To: netmod@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id F3E81120115; Mon, 23 Sep 2019 23:37:53 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -4.19 X-Spam-Level: X-Spam-Status: No, score=-4.19 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, L_8BIT_MISMATCH=0.01, RCVD_IN_DNSWL_MED=-2.3, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id t0muvVHzotMq; Mon, 23 Sep 2019 23:37:52 -0700 (PDT) Received: from rfc-editor.org (rfc-editor.org [4.31.198.49]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 3BCC7120137; Mon, 23 Sep 2019 23:37:52 -0700 (PDT) Received: by rfc-editor.org (Postfix, from userid 30) id 4D0D2B81253; Mon, 23 Sep 2019 23:37:32 -0700 (PDT) To: bill.wu@huawei.com, mjethanandani@gmail.com, sagarwal12@gmail.com, huangyi_99@yahoo.com, dana@blairhome.com X-PHP-Originating-Script: 30:errata_mail_lib.php From: RFC Errata System Cc: joelja@bogus.com, iesg@ietf.org, netmod@ietf.org, rfc-editor@rfc-editor.org Content-Type: text/plain; charset=UTF-8 Message-Id: <20190924063732.4D0D2B81253@rfc-editor.org> Date: Mon, 23 Sep 2019 23:37:32 -0700 (PDT) Archived-At: Subject: [netmod] [Errata Rejected] RFC8519 (5762) X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 24 Sep 2019 06:37:54 -0000 The following errata report has been rejected for RFC8519, "YANG Data Model for Network Access Control Lists (ACLs)". -------------------------------------- You may review the report below and at: https://www.rfc-editor.org/errata/eid5762 -------------------------------------- Status: Rejected Type: Technical Reported by: Qin WU Date Reported: 2019-06-24 Rejected by: Joel Jaeggli (IESG) Section: 4.1 Original Text ------------- leaf type { type acl-type; description "Type of ACL. Indicates the primary intended type of match criteria (e.g., Ethernet, IPv4, IPv6, mixed, etc.) used in the list instance."; } Corrected Text -------------- leaf type { type acl-type; default "ipv4-acl-type"; description "Type of ACL. Indicates the primary intended type of match criteria (e.g., Ethernet, IPv4, IPv6, mixed, etc.) used in the list instance."; } Notes ----- I am wondering why not set default value for acl-type,e.g., set default value as "ipv4-acl-type" otherwise, how to determine which field under which choice will be matched upon and which action should be taken on them if the opetional parameter type under acl list is not set. Also I want to better understand why acl type is removed from key indexes of access list and keep it as optional parameter under acl list. One case I am thinking in my mind is we add a mixed Ethernet, IPv4, and IPv6 ACL entry when we already have Ethernet ACL entry,IPv4 ACL entry , we don't need to remove existing ethernet entry and existing IPv4 entry in the list ("aces") and create a new entry with mixed ethernet, IPv4, IPv6 ACL, instead, we just add a new identity called mixed-eth-ipv4-ipv6-acl-type and add a new IPv6 entry. --VERIFIER NOTES-- Mahesh Jethanandani replied: This errata should be rejected for the following reason. The whole idea of defining the identities for acl-type was to allow vendors to specify what capabilities their box is capable of supporting and then to specify what capabilities the vendors want to support. As such there is no “default capability" for every vendor. Besides, if a device advertises a mixed-eth-ipv4 feature, it is because it can only support Ethernet and IPv4 ACL combinations, and it cannot support IPv6 ACL matches. You do not add a capability of IPv6 match on the fly. It either has it, or it does not. If it does, advertise mixed-eth-ipv4-ipv6 capability to begin with. The errata proposes a change to the standard and is not correcting an error in the document. additionaly it not clear why it would be appraise to set a default acl type. The errata is declined. -------------------------------------- RFC8519 (draft-ietf-netmod-acl-model-21) -------------------------------------- Title : YANG Data Model for Network Access Control Lists (ACLs) Publication Date : March 2019 Author(s) : M. Jethanandani, S. Agarwal, L. Huang, D. Blair Category : PROPOSED STANDARD Source : Network Modeling Area : Operations and Management Stream : IETF Verifying Party : IESG From nobody Tue Sep 24 09:53:46 2019 Return-Path: X-Original-To: netmod@ietfa.amsl.com Delivered-To: netmod@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 63C2F12084B for ; Tue, 24 Sep 2019 09:53:44 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -6.896 X-Spam-Level: X-Spam-Status: No, score=-6.896 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_HI=-5, SPF_HELO_NONE=0.001, SPF_NONE=0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 0LISRvjcuddd for ; Tue, 24 Sep 2019 09:53:42 -0700 (PDT) Received: from nagasaki.bogus.com (nagasaki.bogus.com [IPv6:2001:418:1::81]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 56AF412084A for ; Tue, 24 Sep 2019 09:53:42 -0700 (PDT) Received: from [IPv6:2607:fb90:3653:cad:99bc:c23b:5b02:fd83] ([IPv6:2607:fb90:3653:cad:99bc:c23b:5b02:fd83]) (authenticated bits=0) by nagasaki.bogus.com (8.15.2/8.15.2) with ESMTPSA id x8OGrdwk094413 for ; Tue, 24 Sep 2019 16:53:41 GMT (envelope-from joelja@bogus.com) From: Joel Jaeggli Content-Type: multipart/alternative; boundary="Apple-Mail=_2201947E-C5E2-4E3D-B127-DE08F01E3971" Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.11\)) Message-Id: <83B9ABBB-3408-4789-B666-4494E506D8B8@bogus.com> Date: Tue, 24 Sep 2019 09:53:39 -0700 To: NETMOD Working Group X-Mailer: Apple Mail (2.3445.104.11) Archived-At: Subject: [netmod] Open Errata 5517 RFC 7950 https://www.rfc-editor.org/errata/eid5517 X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 24 Sep 2019 16:53:45 -0000 --Apple-Mail=_2201947E-C5E2-4E3D-B127-DE08F01E3971 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii Reported By: Rohit R Ranade Section 10.4.2 says: The derived-from-or-self() function returns "true" if any node in the argument "nodes" is a node of type "identityref" and its value is an identity that is equal to or derived from (see Section 7.18.2) the identity "identity"; otherwise, it returns "false". It should say: The derived-from-or-self() function returns "true" if any node in the argument "nodes" is a node of type equal to or derived=20 from "identityref" and its value is an identity that is equal to or derived from (see Section 7.18.2) the identity "identity";=20 otherwise, it returns "false". Martin Bjorklund wrote I agree that the text needs clarification. However, I propose this text instead: The derived-from-or-self() function returns "true" if any node in the argument "nodes" is a node of type "identityref" or a type derived from "identityref", and its value is an identity that is equal to or derived from (see Section 7.18.2) the identity "identity";=20 otherwise, it returns "false". Ladislav Lhotka wrote This formulation is better. It is somewhat confusing that "derived from" has two unrelated meanings = in the same sentence. This errata is processed as accepted, the errata clarifies that the = function returns true from the case where "a node is of a type derived from "identityref"" in addition to the case where the node is of type = indetityref. this is a clarification and can we believe be read properly = in conjunction with the existing RFC. Thanks Joel --Apple-Mail=_2201947E-C5E2-4E3D-B127-DE08F01E3971 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=us-ascii

Reported By: Rohit R Ranade

Section 10.4.2 says:

   The derived-from-or-self() function returns =
"true" if any node in the
   argument "nodes" is a node of type "identityref" and its value is an
   identity that is equal to or derived from (see Section 7.18.2) the
   identity "identity"; otherwise, it returns "false".

It should say:

 The =
derived-from-or-self() function returns "true" if any node in the
 argument "nodes" is a node of type equal to or derived=20
 from "identityref" and its value is an identity that is equal to or
 derived from (see Section 7.18.2) the identity "identity";=20
 otherwise, it returns "false".

Martin Bjorklund = wrote

I agree that the text needs clarification. =  However, I propose this
text instead:

 The = derived-from-or-self() function returns "true" if any node in = the
 argument "nodes" is a node of type "identityref" or a = type derived
 from "identityref", and its value is an = identity that is equal to or
 derived from (see Section 7.18.2) the = identity "identity"; 
 otherwise, it returns = "false".


Ladislav Lhotka = wrote

This formulation is = better.

It is somewhat confusing that "derived from" has two = unrelated meanings in the
same sentence.


This errata is processed as accepted, =  the errata clarifies that the function returns true from = the case where "a node is of a = type derived
 from "identityref"" in addition to the = case where the node is of type indetityref. this is a clarification and = can we believe be read properly in conjunction with the existing = RFC.


Thanks
Joel


= --Apple-Mail=_2201947E-C5E2-4E3D-B127-DE08F01E3971-- From nobody Tue Sep 24 09:56:00 2019 Return-Path: X-Original-To: netmod@ietfa.amsl.com Delivered-To: netmod@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 3B172120013 for ; Tue, 24 Sep 2019 09:55:59 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -6.897 X-Spam-Level: X-Spam-Status: No, score=-6.897 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_HI=-5, SPF_HELO_NONE=0.001, SPF_NONE=0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id apRTPBsaykda for ; Tue, 24 Sep 2019 09:55:58 -0700 (PDT) Received: from nagasaki.bogus.com (nagasaki.bogus.com [IPv6:2001:418:1::81]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 08C5C120072 for ; Tue, 24 Sep 2019 09:55:58 -0700 (PDT) Received: from [IPv6:2607:fb90:3653:cad:99bc:c23b:5b02:fd83] ([IPv6:2607:fb90:3653:cad:99bc:c23b:5b02:fd83]) (authenticated bits=0) by nagasaki.bogus.com (8.15.2/8.15.2) with ESMTPSA id x8OGttWX094457; Tue, 24 Sep 2019 16:55:57 GMT (envelope-from joelja@bogus.com) Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.11\)) From: Joel Jaeggli In-Reply-To: <20190923.100809.462896493479149533.mbj@tail-f.com> Date: Tue, 24 Sep 2019 09:55:55 -0700 Cc: netmod@ietf.org Content-Transfer-Encoding: quoted-printable Message-Id: <7BB2BAB2-9FCF-455F-ADF1-A83CF4E2AC3B@bogus.com> References: <8918D13C-FEF3-4541-815D-D2E8E5E157E9@bogus.com> <20190923.100809.462896493479149533.mbj@tail-f.com> To: Martin Bjorklund X-Mailer: Apple Mail (2.3445.104.11) Archived-At: Subject: Re: [netmod] Processing open errata in the the netmod working group X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 24 Sep 2019 16:55:59 -0000 > On Sep 23, 2019, at 01:08, Martin Bjorklund wrote: >=20 > Joel Jaeggli wrote: >> Folks, >>=20 >> Over the course of this we we intend to process reported errata that >> we have outstanding in netmod >=20 > I started to go through the list and comment, but then I realized that > you probably didn't ask for comments? This was just a FYI? Largely, you have commented on some of them already. I am reading = through them with respect to outstanding comments. joel >=20 >=20 > /martin >=20 From nobody Tue Sep 24 09:56:43 2019 Return-Path: X-Original-To: netmod@ietfa.amsl.com Delivered-To: netmod@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 13FAB12008D; Tue, 24 Sep 2019 09:56:33 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -4.2 X-Spam-Level: X-Spam-Status: No, score=-4.2 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id drJsOyA7DcTz; Tue, 24 Sep 2019 09:56:31 -0700 (PDT) Received: from rfc-editor.org (rfc-editor.org [4.31.198.49]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 42927120072; Tue, 24 Sep 2019 09:56:31 -0700 (PDT) Received: by rfc-editor.org (Postfix, from userid 30) id C5593B80B2B; Tue, 24 Sep 2019 09:56:10 -0700 (PDT) To: rohitrranade@huawei.com, mbj@tail-f.com X-PHP-Originating-Script: 30:errata_mail_lib.php From: RFC Errata System Cc: joelja@bogus.com, iesg@ietf.org, netmod@ietf.org, rfc-editor@rfc-editor.org Content-Type: text/plain; charset=UTF-8 Message-Id: <20190924165610.C5593B80B2B@rfc-editor.org> Date: Tue, 24 Sep 2019 09:56:10 -0700 (PDT) Archived-At: Subject: [netmod] [Errata Verified] RFC7950 (5517) X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 24 Sep 2019 16:56:33 -0000 The following errata report has been verified for RFC7950, "The YANG 1.1 Data Modeling Language". -------------------------------------- You may review the report below and at: https://www.rfc-editor.org/errata/eid5517 -------------------------------------- Status: Verified Type: Technical Reported by: Rohit R Ranade Date Reported: 2018-10-08 Verified by: Joel Jaeggli (IESG) Section: 10.4.2 Original Text ------------- The derived-from-or-self() function returns "true" if any node in the argument "nodes" is a node of type "identityref" and its value is an identity that is equal to or derived from (see Section 7.18.2) the identity "identity"; otherwise, it returns "false". Corrected Text -------------- The derived-from-or-self() function returns "true" if any node in the argument "nodes" is a node of type "identityref" or a type derived from "identityref", and its value is an identity that is equal to or derived from (see Section 7.18.2) the identity "identity"; otherwise, it returns "false". Notes ----- The node-set can have node which are of types that may be derived from an identityref. Typical example is in ietf-netconf-nmda, where "when 'derived-from-or-self(datastore, "ds:operational")';" is used, but the "datastore" node is of type "datastore-ref" defined in ietf-datastores module, which is in-turn derived from "identityref" corrected text proposal with additional editing by Martin Bjorklund and Ladislav Lhotka -------------------------------------- RFC7950 (draft-ietf-netmod-rfc6020bis-14) -------------------------------------- Title : The YANG 1.1 Data Modeling Language Publication Date : August 2016 Author(s) : M. Bjorklund, Ed. Category : PROPOSED STANDARD Source : Network Modeling Area : Operations and Management Stream : IETF Verifying Party : IESG From nobody Wed Sep 25 04:54:35 2019 Return-Path: X-Original-To: netmod@ietfa.amsl.com Delivered-To: netmod@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 920B3120122 for ; Wed, 25 Sep 2019 04:54:33 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -4.19 X-Spam-Level: X-Spam-Status: No, score=-4.19 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_MED=-2.3, SPF_PASS=-0.001, T_MIME_MALF=0.01] autolearn=ham autolearn_force=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id aDhbADF12zb2 for ; Wed, 25 Sep 2019 04:54:31 -0700 (PDT) Received: from huawei.com (lhrrgout.huawei.com [185.176.76.210]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 2309D1201AA for ; 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Wed, 25 Sep 2019 19:54:15 +0800 From: Qin Wu To: "netmod@ietf.org" CC: Zengjuan Thread-Topic: CRUD operations on Leaf-list in RFC8040 Thread-Index: AdVzlF1slQHq13wqRTm4LDQAl58axQ== Date: Wed, 25 Sep 2019 11:54:15 +0000 Message-ID: Accept-Language: zh-CN, en-US Content-Language: zh-CN X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.134.31.203] Content-Type: multipart/alternative; boundary="_000_B8F9A780D330094D99AF023C5877DABAA9322BD1dggeml511mbschi_" MIME-Version: 1.0 X-CFilter-Loop: Reflected Archived-At: Subject: [netmod] CRUD operations on Leaf-list in RFC8040 X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 25 Sep 2019 11:54:34 -0000 --_000_B8F9A780D330094D99AF023C5877DABAA9322BD1dggeml511mbschi_ Content-Type: text/plain; charset="gb2312" Content-Transfer-Encoding: base64 SGksIEFsbDoNCkR1cmluZyBpbXBsZW1lbnRpbmcgUkZDODA0MCwgd2UgZmFjZSBhIGZldyBwcm9i bGVtcyByZWxhdGVkIHRvIGxlYWYtbGlzdCB1c2FnZS4NCkkgYW0gd29uZGVyaW5nIGhvdyBkbyB3 ZSBjcmVhdGUgbXVsdGlwbGUgaW5zdGFuY2Ugb2YgbGVhZi1saXN0IGRhdGEgcmVzb3VyY2U/DQpT dXBwb3NlIHdlIGhhdmUgZXhhbXBsZS1mb28ueWFuZyBtb2RlbCBhcyBmb2xsb3dzOg0KZXhhbXBs ZS10b3AueWFuZw0KDQogICBjb250YWluZXIgdG9wIHsNCiAgICBsaXN0IGxpc3QxIHsNCiAgICAg ICAga2V5ICJrZXkxIGtleTIga2V5MyI7DQogICAgICAgICAuLi4NCiAgICAgICAgIGxpc3QgbGlz dDIgew0KICAgICAgICAgICAgIGtleSAia2V5NCBrZXk1IjsNCiAgICAgICAgICAgICAuLi4NCiAg ICAgICAgICAgICBsZWFmIFggeyB0eXBlIHN0cmluZzsgfQ0KICAgICAgICAgfQ0KICAgICB9DQog ICAgIGxlYWYtbGlzdCBZIHsNCiAgICAgICB0eXBlIHVpbnQzMjsNCiAgICAgfQ0KfQ0KVG8gY3Jl YXRlIGEgbmV3ICJZIiByZXNvdXJjZSB3aXRoaW4gdGhlICJ0b3AiIHJlc291cmNlLCBjYW4gd2Ug bWFrZQ0KdGhlIGNsaWVudCBzZW5kIHRoZSBmb2xsb3dpbmcgcmVxdWVzdDoNClBPU1QgL3Jlc3Rj b25mL2RhdGEvZXhhbXBsZS10b3A6dG9wIEhUVFAvMS4xDQpIb3N0OiBleGFtcGxlLmNvbQ0KQ29u dGVudC1UeXBlOiBhcHBsaWNhdGlvbi95YW5nLWRhdGEranNvbg0KDQp7DQogICJleGFtcGxlLXRv cDpZIiA6IFt2YWx1ZTEsdmFsdWUyXQ0KfQ0KDQpyZXNwb25zZaO6DQpIVFRQLzEuMSAyMDEgQ3Jl YXRlZA0KRGF0ZTogVGh1LCAyNiBKYW4gMjAxNyAyMDo1NjozMCBHTVQNClNlcnZlcjogZXhhbXBs ZS1zZXJ2ZXINCkxvY2F0aW9uOiBodHRwczovL2V4YW1wbGUuY29tL3Jlc3Rjb25mL2RhdGEvZXhh bXBsZS10b3A6dG9wL1k9dmFsdWUxJnZhbHVlMg0KTGFzdC1Nb2RpZmllZDogVGh1LCAyNiBKYW4g MjAxNyAyMDo1NjozMCBHTVQNCkVUYWc6ICJiMzgzMGYyM2E0YyINCg0KQWxzbyBJIGRvbqGvdCB1 bmRlcnN0YW5kIHdoeSB3ZSBhZGQgbGltaXRhdGlvbiB0byBQVVQgbWV0aG9kIGFuZCBwbGFpbiBw YXRjaCBtZXRob2Qgb24gbGVhZi1saXN0IGFuZCBkb26hr3QgYWxsb3cNClRoZSB2YWx1ZSBvZiBs ZWFmLWxpc3QgaW5zdGFuY2UgdG8gYmUgY2hhbmdlZCBieSB0aGVzZSB0d28gbWV0aG9kcw0Kc2Vl IHNlY3Rpb24gNC41IGFuZCBzZWN0aW9uIDQuNi4xDQqhsA0KNC41LiAgUFVUDQogICBJZiB0aGUg dGFyZ2V0IHJlc291cmNlIHJlcHJlc2VudHMgYSBZQU5HIGxlYWYtbGlzdCwgdGhlbiB0aGUgUFVU DQogICBtZXRob2QgTVVTVCBOT1QgY2hhbmdlIHRoZSB2YWx1ZSBvZiB0aGUgbGVhZi1saXN0IGlu c3RhbmNlLg0KNC42LjEuICBQbGFpbiBQYXRjaA0KICAgSWYgdGhlIHRhcmdldCByZXNvdXJjZSBy ZXByZXNlbnRzIGEgWUFORyBsZWFmLWxpc3QsIHRoZW4gdGhlIFBBVENIDQogICBtZXRob2QgTVVT VCBOT1QgY2hhbmdlIHRoZSB2YWx1ZSBvZiB0aGUgbGVhZi1saXN0IGluc3RhbmNlLg0KobANClN1 cHBvc2UgSSB3YW50IHRvIGRlbGV0ZSBhbGwgbGVhZi1saXN0IGluc3RhbmNlIHZhbHVlcyBhc3Nv Y2lhdGVkIHdpdGggbGVhZi1saXN0ICJZIiwNCkNhbiBJIHNlbmQgdGhlIGZvbGxvd2luZyByZXF1 ZXN0Og0KREVMRVRFIC9yZXN0Y29uZi9kYXRhL2V4YW1wbGUtdG9wOnRvcC9ZICBIVFRQLzEuMQ0K SG9zdDogZXhhbXBsZS5jb20NCg0KUXVvdGVkIHNlY3Rpb24gNC43Og0KobANCjQuNy4gIERFTEVU RQ0KICAgSWYgdGhlIHRhcmdldCByZXNvdXJjZSByZXByZXNlbnRzIGEgY29uZmlndXJhdGlvbiBs ZWFmLWxpc3Qgb3IgbGlzdA0KICAgZGF0YSBub2RlLCB0aGVuIGl0IE1VU1QgcmVwcmVzZW50IGEg c2luZ2xlIFlBTkcgbGVhZi1saXN0IG9yIGxpc3QNCiAgIGluc3RhbmNlLiAgVGhlIHNlcnZlciBN VVNUIE5PVCB1c2UgdGhlIERFTEVURSBtZXRob2QgdG8gZGVsZXRlIG1vcmUNCiAgIHRoYW4gb25l IHN1Y2ggaW5zdGFuY2UuDQqhsQ0KSXQgc2VlbXMgb2J2aW91cyB0aGF0IERFTEVURSBtZXRob2Qg Y2FuIG5vdCBkZWxldGUgbW9yZSB0aGFuIG9uZSBpbnN0YW5jZXMuIEJ1dCBJIGRvbqGvdCBrbm93 IHdoeT8NCg0KDQpBbHNvIEkgZG9uoa90IGtub3cgd2UgYWRkIGNvbnN0cmFpbnQgb24gWE1MIGVu Y29kaW5nIGluIHRoZSBHZXQgcmVxdWVzdCwgb25seSBhbGxvdyBvbmUgc2luZ2xlIGVsZW1lbnQg YmUNCnJldHVybmVkIGZvciBYTUwgZW5jb2RpbmcsIHNlZSBzZWN0aW9uIDQuMyBvZiBSRkM4MDQw IGFzIGZvbGxvd3M6DQqhsA0KNC4zLiAgR0VUDQogICBJZiBhIHJldHJpZXZhbCByZXF1ZXN0IGZv ciBhIGRhdGEgcmVzb3VyY2UgcmVwcmVzZW50aW5nIGEgWUFORw0KICAgbGVhZi1saXN0IG9yIGxp c3Qgb2JqZWN0IGlkZW50aWZpZXMgbW9yZSB0aGFuIG9uZSBpbnN0YW5jZSBhbmQgWE1MDQogICBl bmNvZGluZyBpcyB1c2VkIGluIHRoZSByZXNwb25zZSwgdGhlbiBhbiBlcnJvciByZXNwb25zZSBj b250YWluaW5nIGENCiAgICI0MDAgQmFkIFJlcXVlc3QiIHN0YXR1cy1saW5lIE1VU1QgYmUgcmV0 dXJuZWQgYnkgdGhlIHNlcnZlci4NCqGwDQpTdXBwb3NlIEkgd2FudCB0byByZXRyaWV2ZS9kZWxl dGUvbW9kaWZ5IG11bHRpcGxlIGxlYWYtbGlzdCBpbnN0YW5jZSBkYXRhIHJlc291cmNlLCBjYW4g SSB3cmFwIGxlYWYtbGlzdCAiWSIgd2l0aGluIGNvbnRhaW5lciAidG9wIiwNCmNyZWF0ZS9kZWxl dGUvbW9kaWZ5IGNvbnRhaW5lciAidG9wIiBkYXRhIHJlc291cmNlPw0KobANCkNvbW1lbnRzPw0K DQotUWluDQoNCg== --_000_B8F9A780D330094D99AF023C5877DABAA9322BD1dggeml511mbschi_ Content-Type: text/html; charset="gb2312" Content-Transfer-Encoding: quoted-printable

Hi, A= ll:

Durin= g implementing RFC8040, we face a few problems related to leaf-list usage.<= o:p>

I am = wondering how do we create multiple instance of leaf-list data resource?

Suppo= se we have example-foo.yang model as follows:

examp= le-top.yang

=  

 = ;  container top {

 = ;   list list1 {

 = ;       key "key1 key2 key3";<= /o:p>

 = ;        ...

 = ;        list list2 {<= /p>

 = ;            key &qu= ot;key4 key5";

 = ;            ...

 = ;            leaf X = { type string; }

 = ;        }

 = ;    }

 = ;    leaf-list Y {

 = ;      type uint32;

 = ;    }

}

To cr= eate a new "Y" resource within the "top" resource, can = we make

the c= lient send the following request:

POST = /restconf/data/example-top:top HTTP/1.1

Host:= example.com

Conte= nt-Type: application/yang-data+json

=  

{

 = ; "example-top:Y" : [value1,value2]

}

=  

respo= nse=A3=BA<= span lang=3D"EN">

HTTP/= 1.1 201 Created

Date:= Thu, 26 Jan 2017 20:56:30 GMT

Serve= r: example-server

Locat= ion: https://example.com/restconf/data/example-top:top/Y=3Dvalue1&value= 2

Last-= Modified: Thu, 26 Jan 2017 20:56:30 GMT

ETag:= "b3830f23a4c"

 

Also = I don=A1=AFt understand why we add limitation to PUT method and plain patch= method on leaf-list and don=A1=AFt allow

The v= alue of leaf-list instance to be changed by these two methods

see s= ection 4.5 and section 4.6.1

=A1= =B0

4.5.&= nbsp; PUT

 = ;  If the target resource represents a YANG leaf-list, then the PUT

 = ;  method MUST NOT change the value of the leaf-list instance.

4.6.1= .  Plain Patch

 = ;  If the target resource represents a YANG leaf-list, then the PATCH<= o:p>

 = ;  method MUST NOT change the value of the leaf-list instance.

=A1= =B0

Suppo= se I want to delete all leaf-list instance values associated with leaf-list= "Y",

Can I= send the following request:

DELET= E /restconf/data/example-top:top/Y  HTTP/1.1

Host:= example.com

=  

Quote= d section 4.7:

=A1= =B0

4.7.&= nbsp; DELETE 

 = ;  If the target resource represents a configuration leaf-list or= list

 = ;  data node, then it MUST represent a single YANG leaf-list or list

 = ;  instance.  The server MUST NOT use the DELETE method to delete= more

 = ;  than one such instance.

=A1= =B1

It se= ems obvious that DELETE method can not delete more than one instances. But = I don=A1=AFt know why?

=  

Also I don=A1=AFt=
 know we add constraint on XML encoding in the Get request, only allow one =
single element be

retur= ned for XML encoding, see section 4.3 of RFC8040 as follows:

=A1= =B0

4.3.&= nbsp; GET

 = ;  If a retrieval request for a data resource representing a YANG=

 = ;  leaf-list or list object identifies more than one instance and XML<= o:p>

 = ;  encoding is used in the response, then an error response containing= a

 = ;  "400 Bad Request" status-line MUST be returned by the ser= ver.

=A1= =B0

Suppo= se I want to retrieve/delete/modify multiple leaf-list instance data resour= ce, can I wrap leaf-list "Y" within container "top",

creat= e/delete/modify container "top" data resource?<= /p>

=A1= =B0

Comme= nts?

=  

-Qin<= o:p>

=  

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Wed, 25 Sep 2019 15:37:21 +0000 From: "Sterne, Jason (Nokia - CA/Ottawa)" To: "netmod@ietf.org" Thread-Topic: evaluating 'when' statements with unconfigured leafs Thread-Index: AdVztlaksY9LmjUPRkOXky2jxUtn2Q== Date: Wed, 25 Sep 2019 15:37:21 +0000 Message-ID: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: spf=none (sender IP is ) smtp.mailfrom=jason.sterne@nokia.com; x-originating-ip: [135.245.20.8] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 4dabc5d6-aa0a-4b91-0715-08d741ce418e x-ms-office365-filtering-ht: Tenant x-ms-traffictypediagnostic: VI1SPR01MB0337: x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:8882; x-forefront-prvs: 01713B2841 x-forefront-antispam-report: SFV:NSPM; SFS:(10019020)(4636009)(136003)(346002)(39860400002)(396003)(366004)(376002)(53754006)(189003)(199004)(1730700003)(102836004)(486006)(66446008)(81166006)(2351001)(5640700003)(52536014)(316002)(476003)(6116002)(66476007)(8936002)(64756008)(66946007)(66066001)(2501003)(99286004)(7736002)(33656002)(76116006)(6916009)(8676002)(5660300002)(6306002)(86362001)(54896002)(26005)(4744005)(14454004)(2906002)(790700001)(55016002)(66556008)(71190400001)(3846002)(81156014)(7696005)(6436002)(14444005)(186003)(9686003)(6506007)(25786009)(71200400001)(256004)(74316002)(478600001)(461764006); 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charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi all, I saw some recent questions about 'when' statements. I had another one rela= ted to evaluating 'when' statements that involve leafs that don't currently= have a value at all. leaf foo { type enumeration { enum val1; enum val2; } } leaf bar { when "../foo !=3D 'val2'"; type uint8; } Notice that foo does not have a default statement. So if no manager has set= leaf foo, it doesn't exist in the config. In that case, does the "when" statement evaluate to 'true' (i.e. leaf bar = is allowed to have a value) ? i.e. assuming leaf foo is not set at all, is this accepted? 23 Or is there something special here because of the non-existence of leaf foo= ? If the "when" evaluates to 'false', then does the following "when" evaluate= differently than the one above? when "not(../foo =3D 'val2')"; Jason --_000_VI1PR07MB3981888B6E7B657DD0E97F219B870VI1PR07MB3981eurp_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Hi all,

 

I saw some recent questions about 'when' statements.= I had another one related to evaluating 'when' statements that involve lea= fs that don't currently have a value at all.

 

leaf foo {

    type enumeration {

        enum val1= ;

        enum val2= ;

    }

}

 

leaf bar {

    when "../foo !=3D 'val2'&quo= t;;

    type uint8;

}

 

Notice that foo does not have a default statement. S= o if no manager has set leaf foo, it doesn't exist in the config.

 

In that case, does the "when" statement ev= aluate to 'true'  (i.e. leaf bar is allowed to have a value) ?

 

i.e. assuming leaf foo is not set at all, is this ac= cepted?

<bar>23</bar>

 

Or is there something special here because of the no= n-existence of leaf foo?

 

If the "when" evaluates to 'false', then d= oes the following "when" evaluate differently than the one above?=

    when "not(../foo =3D 'val2')= ";

 

Jason

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<5756FB984666AD4BB8E1D63E2E3AA3D001F2CBE4@dggemm513-mbx.china.huawei.com> <5756FB984666AD4BB8E1D63E2E3AA3D001F2D325@dggemm513-mbx.china.huawei.com> In-Reply-To: From: Andy Bierman Date: Wed, 25 Sep 2019 08:59:21 -0700 Message-ID: To: "Sterne, Jason (Nokia - CA/Ottawa)" Cc: Qin Wu , "Fengchong (frank)" , "netmod@ietf.org" , Yangang Content-Type: multipart/related; boundary="00000000000030233c059362bd6b" Archived-At: Subject: Re: [netmod] =?utf-8?b?562U5aSNOiDnrZTlpI06IFBsZWFzZSBjbGFyaWZ5IGlt?= =?utf-8?b?cGxlbWVudGF0aW9uIGFib3V0IOKAmHdoZW7igJk=?= X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 25 Sep 2019 15:59:42 -0000 --00000000000030233c059362bd6b Content-Type: multipart/alternative; boundary="00000000000030233a059362bd6a" --00000000000030233a059362bd6a Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Wed, Sep 25, 2019 at 8:44 AM Sterne, Jason (Nokia - CA/Ottawa) < jason.sterne@nokia.com> wrote: > Processing order should not matter. The evaluation of the 'when' statemen= t > should be done assuming an atomic application of the edit-config. > > > > I agree that a standards compliant server should do as Rob said: > > > > - For =E2=80=9Cscene 1=E2=80=9D, the config change is accepted because th= e result of the > config datastore after the edit-config has been applied is valid. > > - For =E2=80=9Cscene 2=E2=80=9D, the config change is rejected because th= e result of the > config datastore after the edit-config has been applied is invalid. > > > > From an implementation that may indeed mean processing the 'when' after a > first pass that sets the various leafs to tentative values. But that's > implementation detail. > > > > IMO the auto-clearing behavior of 'when' may be complicated but that is > how it is defined (same with 'choice'). Clients can and should depend on > things being automatically deleted. If you want validation errors (i.e. > force the client to clear all the dependant leafs instead of auto-clearin= g) > then use a 'must' statement. > > > +1 YANG clearly defines "must" and "when" with different behavior. A server that does not implement the auto-delete aspects of when-stmt is not compliant to the RFC. > Jason > Andy > > > *From:* netmod *On Behalf Of *Qin Wu > *Sent:* Tuesday, September 10, 2019 10:33 PM > *To:* Fengchong (frank) ; Andy Bierman < > andy@yumaworks.com> > *Cc:* netmod@ietf.org; Yangang > *Subject:* [netmod] =E7=AD=94=E5=A4=8D: =E7=AD=94=E5=A4=8D: Please clarif= y implementation about =E2=80=98when=E2=80=99 > > > > Why processing order matter? My interpretation is both leaf node values > (i.e.,leaf a, leaf b) should be validated together and commit as a whole, > > RFC6241 said: > > =E2=80=9C > > If the device is unable to commit all of the changes in the > > candidate configuration datastore, then the running > > configuration MUST remain unchanged. > > =E2=80=9D > > So validate the leaf node value in the edit-config request (message > content validation) is not important, validate the leaf node value that i= s > applied to (datastore validation) is the key. > > > > I think what you want to raise is the server should hold on to send reply= with an "unknown-element" in the during payload pa= rsing phase and NETCONF > > Processing until all validation complete, otherwise it seems server will > > Send multiple rply with "unknown-element" in the = which seems not reasonable. > > > > -Qin > > *=E5=8F=91=E4=BB=B6=E4=BA=BA**:* netmod [mailto:netmod-bounces@ietf.org <= netmod-bounces@ietf.org>] > *=E4=BB=A3=E8=A1=A8 *Fengchong (frank) > *=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4**:* 2019=E5=B9=B49=E6=9C=8811=E6=97= =A5 9:29 > *=E6=94=B6=E4=BB=B6=E4=BA=BA**:* Andy Bierman > *=E6=8A=84=E9=80=81**:* netmod@ietf.org; Yangang > *=E4=B8=BB=E9=A2=98**:* [netmod] =E7=AD=94=E5=A4=8D: Please clarify imple= mentation about =E2=80=98when=E2=80=99 > > > > Andy, > > > > Whether different result would occur according different process order? > > According 8.3.2 > > if server process =E2=80=98a=3D 3=E2=80=99 firstly, b will be deleted by = system and becomes > a non-exist schema node, and then when =E2=80=98b=3D5=E2=80=99 is proces= sed , server will > report a =E2=80=98unknown-element=E2=80=99 error. > > But if server process =E2=80=98b=3D5=E2=80=99 firstly, it will be accepte= d by server, and > then when =E2=80=98a=3D3=E2=80=99 is processed, b will be deleted by syst= em, but report OK. > > > > If sec 8.3.2 is not right. What is the right? > > When node a and node b in the same request, and b tagged when condition, > a=E2=80=99s value will cause b=E2=80=99s condition is evaluated to false,= which is more > prior? > > According you and Rob=E2=80=99s interpretation , maybe node =E2=80=99a=E2= =80=99 is more prior? If > yes, why node =E2=80=98b=E2=80=99 should be processed later? > > > > I think whether in edit-config processing phase the configuration tagged > when should not be evaluated and be delayed to commit or validate? > > When commit or validate operation is issued, the data node tagged when > will be evaluated, and if it=E2=80=99s evaluated to false, this data will= be > deleted by system immediately, server should not report any error. > > > > > ------------------------------ > > =E5=8D=8E=E4=B8=BA=E6=8A=80=E6=9C=AF=E6=9C=89=E9=99=90=E5=85=AC=E5=8F=B8 = Huawei Technologies Co., Ltd. > > [image: Company_logo] > > =E4=B8=AA=E4=BA=BA=E7=AD=BE=E5=90=8D=EF=BC=9A=E5=86=AF=E5=86=B2 > =E6=89=8B =E6=9C=BA=EF=BC=9A13776612983 > =E7=94=B5=E5=AD=90=E9=82=AE=E4=BB=B6=EF=BC=9Afrank.fengchong@huawei.com > =E5=85=AC=E5=8F=B8=E7=BD=91=E5=9D=80=EF=BC=9Awww.huawei.com > ------------------------------ > > =EF=BB=BF =E6=9C=AC=E9=82=AE=E4=BB=B6=E5=8F=8A=E5=85=B6=E9=99=84=E4=BB=B6= =E5=90=AB=E6=9C=89=E5=8D=8E=E4=B8=BA=E5=85=AC=E5=8F=B8=E7=9A=84=E4=BF=9D=E5= =AF=86=E4=BF=A1=E6=81=AF=EF=BC=8C=E4=BB=85=E9=99=90=E4=BA=8E=E5=8F=91=E9=80= =81=E7=BB=99=E4=B8=8A=E9=9D=A2=E5=9C=B0=E5=9D=80=E4=B8=AD=E5=88=97=E5=87=BA= =E7=9A=84=E4=B8=AA=E4=BA=BA=E6=88=96=E7=BE=A4=E7=BB=84=E3=80=82=E7=A6=81 > =E6=AD=A2=E4=BB=BB=E4=BD=95=E5=85=B6=E4=BB=96=E4=BA=BA=E4=BB=A5=E4=BB=BB= =E4=BD=95=E5=BD=A2=E5=BC=8F=E4=BD=BF=E7=94=A8=EF=BC=88=E5=8C=85=E6=8B=AC=E4= =BD=86=E4=B8=8D=E9=99=90=E4=BA=8E=E5=85=A8=E9=83=A8=E6=88=96=E9=83=A8=E5=88= =86=E5=9C=B0=E6=B3=84=E9=9C=B2=E3=80=81=E5=A4=8D=E5=88=B6=E3=80=81=E6=88=96= =E6=95=A3=E5=8F=91=EF=BC=89=E6=9C=AC=E9=82=AE=E4=BB=B6=E4=B8=AD > =E7=9A=84=E4=BF=A1=E6=81=AF=E3=80=82=E5=A6=82=E6=9E=9C=E6=82=A8=E9=94=99= =E6=94=B6=E4=BA=86=E6=9C=AC=E9=82=AE=E4=BB=B6=EF=BC=8C=E8=AF=B7=E6=82=A8=E7= =AB=8B=E5=8D=B3=E7=94=B5=E8=AF=9D=E6=88=96=E9=82=AE=E4=BB=B6=E9=80=9A=E7=9F= =A5=E5=8F=91=E4=BB=B6=E4=BA=BA=E5=B9=B6=E5=88=A0=E9=99=A4=E6=9C=AC=E9=82=AE= =E4=BB=B6=EF=BC=81 > This e-mail and its attachments contain confidential information from > HUAWEI, which > is intended only for the person or entity whose address is listed above. > Any use of the > information contained herein in any way (including, but not limited to, > total or partial > disclosure, reproduction, or dissemination) by persons other than the > intended > recipient(s) is prohibited. If you receive this e-mail in error, please > notify the sender by > phone or email immediately and delete it! > > > > *=E5=8F=91=E4=BB=B6=E4=BA=BA**:* Andy Bierman [mailto:andy@yumaworks.com = ] > *=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4**:* 2019=E5=B9=B49=E6=9C=8810=E6=97= =A5 10:56 > *=E6=94=B6=E4=BB=B6=E4=BA=BA**:* Fengchong (frank) > *=E6=8A=84=E9=80=81**:* Rob Wilton (rwilton) ; netmod@= ietf.org; > Yangang > *=E4=B8=BB=E9=A2=98**:* Re: [netmod] Please clarify implementation about = =E2=80=98when=E2=80=99 > > > > > > > > On Mon, Sep 9, 2019 at 7:40 PM Fengchong (frank) < > frank.fengchong@huawei.com> wrote: > > Andy, > > Whether all constraints on content in parameter will not be > evaluated in payload parsing phase, for example, a leaf=E2=80=99s value e= xceed > range? > > Netconf server should treat it as a block data? > > > > > > Field validation and datastore validation are 2 different things. > > when-stmt processing is neither. It is by far the hardest part of an > automated server to get right. > > > > Another question: > > > > In edit-config processing phase, whether constraints on content in > parameter needs be evaluated? > > If yes, when configuration modification cause when condition is evaluate= d > to false, the node tagged when will be automatically deleted by system. > > Then, in scene 2, whether different result would occur according differen= t > process order? > > > > > > Since the parameter is anyxml, the YANG constraints defined on > datastore contents > > are not enforced as part of RPC input validation. > > > > It would be nice if NETCONF defined behavior for providing data > that will get deleted > > immediately by the server. We have a CLI parameter for this since some > vendors want to > > treat this as an error and other just silently delete nodes. Note that > when-stmt can silently > > delete existing nodes not included in the edit. (Lada does not agree this > is how it should work, > > so we need yang-next to decide. Maybe NETCONF needs a --force parameter > for this purpose.) > > > > > > Andy > > > > > > > ------------------------------ > > =E5=8D=8E=E4=B8=BA=E6=8A=80=E6=9C=AF=E6=9C=89=E9=99=90=E5=85=AC=E5=8F=B8 = Huawei Technologies Co., Ltd. > > [image: Company_logo] > > =E4=B8=AA=E4=BA=BA=E7=AD=BE=E5=90=8D=EF=BC=9A=E5=86=AF=E5=86=B2 > =E6=89=8B =E6=9C=BA=EF=BC=9A13776612983 > =E7=94=B5=E5=AD=90=E9=82=AE=E4=BB=B6=EF=BC=9Afrank.fengchong@huawei.com > =E5=85=AC=E5=8F=B8=E7=BD=91=E5=9D=80=EF=BC=9Awww.huawei.com > ------------------------------ > > =EF=BB=BF =E6=9C=AC=E9=82=AE=E4=BB=B6=E5=8F=8A=E5=85=B6=E9=99=84=E4=BB=B6= =E5=90=AB=E6=9C=89=E5=8D=8E=E4=B8=BA=E5=85=AC=E5=8F=B8=E7=9A=84=E4=BF=9D=E5= =AF=86=E4=BF=A1=E6=81=AF=EF=BC=8C=E4=BB=85=E9=99=90=E4=BA=8E=E5=8F=91=E9=80= =81=E7=BB=99=E4=B8=8A=E9=9D=A2=E5=9C=B0=E5=9D=80=E4=B8=AD=E5=88=97=E5=87=BA= =E7=9A=84=E4=B8=AA=E4=BA=BA=E6=88=96=E7=BE=A4=E7=BB=84=E3=80=82=E7=A6=81 > =E6=AD=A2=E4=BB=BB=E4=BD=95=E5=85=B6=E4=BB=96=E4=BA=BA=E4=BB=A5=E4=BB=BB= =E4=BD=95=E5=BD=A2=E5=BC=8F=E4=BD=BF=E7=94=A8=EF=BC=88=E5=8C=85=E6=8B=AC=E4= =BD=86=E4=B8=8D=E9=99=90=E4=BA=8E=E5=85=A8=E9=83=A8=E6=88=96=E9=83=A8=E5=88= =86=E5=9C=B0=E6=B3=84=E9=9C=B2=E3=80=81=E5=A4=8D=E5=88=B6=E3=80=81=E6=88=96= =E6=95=A3=E5=8F=91=EF=BC=89=E6=9C=AC=E9=82=AE=E4=BB=B6=E4=B8=AD > =E7=9A=84=E4=BF=A1=E6=81=AF=E3=80=82=E5=A6=82=E6=9E=9C=E6=82=A8=E9=94=99= =E6=94=B6=E4=BA=86=E6=9C=AC=E9=82=AE=E4=BB=B6=EF=BC=8C=E8=AF=B7=E6=82=A8=E7= =AB=8B=E5=8D=B3=E7=94=B5=E8=AF=9D=E6=88=96=E9=82=AE=E4=BB=B6=E9=80=9A=E7=9F= =A5=E5=8F=91=E4=BB=B6=E4=BA=BA=E5=B9=B6=E5=88=A0=E9=99=A4=E6=9C=AC=E9=82=AE= =E4=BB=B6=EF=BC=81 > This e-mail and its attachments contain confidential information from > HUAWEI, which > is intended only for the person or entity whose address is listed above. > Any use of the > information contained herein in any way (including, but not limited to, > total or partial > disclosure, reproduction, or dissemination) by persons other than the > intended > recipient(s) is prohibited. If you receive this e-mail in error, please > notify the sender by > phone or email immediately and delete it! > > > > *=E5=8F=91=E4=BB=B6=E4=BA=BA**:* Andy Bierman [mailto:andy@yumaworks.com] > *=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4**:* 2019=E5=B9=B49=E6=9C=8810=E6=97= =A5 10:19 > *=E6=94=B6=E4=BB=B6=E4=BA=BA**:* Fengchong (frank) > *=E6=8A=84=E9=80=81**:* Rob Wilton (rwilton) ; netmod@= ietf.org; > Yangang > *=E4=B8=BB=E9=A2=98**:* Re: [netmod] Please clarify implementation about = =E2=80=98when=E2=80=99 > > > > > > > > On Mon, Sep 9, 2019 at 7:10 PM Fengchong (frank) < > frank.fengchong@huawei.com> wrote: > > Hi andy, > > > > You only talk about the constraints on rpc operation=E2=80=99s parameter? > > > > Do you have any opinion about my question? > > > > 8.3.1 does not apply to leaf 'b'. > > The RPC parameter is called 'config'. > > It has no when-stmts to evaluate. > > Rob is correct. > > His example shows what 8.3.1 would cover. > > > > Andy > > > > > > > ------------------------------ > > =E5=8D=8E=E4=B8=BA=E6=8A=80=E6=9C=AF=E6=9C=89=E9=99=90=E5=85=AC=E5=8F=B8 = Huawei Technologies Co., Ltd. > > [image: Company_logo] > > =E4=B8=AA=E4=BA=BA=E7=AD=BE=E5=90=8D=EF=BC=9A=E5=86=AF=E5=86=B2 > =E6=89=8B =E6=9C=BA=EF=BC=9A13776612983 > =E7=94=B5=E5=AD=90=E9=82=AE=E4=BB=B6=EF=BC=9Afrank.fengchong@huawei.com > =E5=85=AC=E5=8F=B8=E7=BD=91=E5=9D=80=EF=BC=9Awww.huawei.com > ------------------------------ > > =EF=BB=BF =E6=9C=AC=E9=82=AE=E4=BB=B6=E5=8F=8A=E5=85=B6=E9=99=84=E4=BB=B6= =E5=90=AB=E6=9C=89=E5=8D=8E=E4=B8=BA=E5=85=AC=E5=8F=B8=E7=9A=84=E4=BF=9D=E5= =AF=86=E4=BF=A1=E6=81=AF=EF=BC=8C=E4=BB=85=E9=99=90=E4=BA=8E=E5=8F=91=E9=80= =81=E7=BB=99=E4=B8=8A=E9=9D=A2=E5=9C=B0=E5=9D=80=E4=B8=AD=E5=88=97=E5=87=BA= =E7=9A=84=E4=B8=AA=E4=BA=BA=E6=88=96=E7=BE=A4=E7=BB=84=E3=80=82=E7=A6=81 > =E6=AD=A2=E4=BB=BB=E4=BD=95=E5=85=B6=E4=BB=96=E4=BA=BA=E4=BB=A5=E4=BB=BB= =E4=BD=95=E5=BD=A2=E5=BC=8F=E4=BD=BF=E7=94=A8=EF=BC=88=E5=8C=85=E6=8B=AC=E4= =BD=86=E4=B8=8D=E9=99=90=E4=BA=8E=E5=85=A8=E9=83=A8=E6=88=96=E9=83=A8=E5=88= =86=E5=9C=B0=E6=B3=84=E9=9C=B2=E3=80=81=E5=A4=8D=E5=88=B6=E3=80=81=E6=88=96= =E6=95=A3=E5=8F=91=EF=BC=89=E6=9C=AC=E9=82=AE=E4=BB=B6=E4=B8=AD > =E7=9A=84=E4=BF=A1=E6=81=AF=E3=80=82=E5=A6=82=E6=9E=9C=E6=82=A8=E9=94=99= =E6=94=B6=E4=BA=86=E6=9C=AC=E9=82=AE=E4=BB=B6=EF=BC=8C=E8=AF=B7=E6=82=A8=E7= =AB=8B=E5=8D=B3=E7=94=B5=E8=AF=9D=E6=88=96=E9=82=AE=E4=BB=B6=E9=80=9A=E7=9F= =A5=E5=8F=91=E4=BB=B6=E4=BA=BA=E5=B9=B6=E5=88=A0=E9=99=A4=E6=9C=AC=E9=82=AE= =E4=BB=B6=EF=BC=81 > This e-mail and its attachments contain confidential information from > HUAWEI, which > is intended only for the person or entity whose address is listed above. > Any use of the > information contained herein in any way (including, but not limited to, > total or partial > disclosure, reproduction, or dissemination) by persons other than the > intended > recipient(s) is prohibited. If you receive this e-mail in error, please > notify the sender by > phone or email immediately and delete it! > > > > *=E5=8F=91=E4=BB=B6=E4=BA=BA**:* Andy Bierman [mailto:andy@yumaworks.com] > *=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4**:* 2019=E5=B9=B49=E6=9C=8810=E6=97= =A5 1:14 > *=E6=94=B6=E4=BB=B6=E4=BA=BA**:* Rob Wilton (rwilton) > *=E6=8A=84=E9=80=81**:* Fengchong (frank) ; n= etmod@ietf.org; > Yangang > *=E4=B8=BB=E9=A2=98**:* Re: [netmod] Please clarify implementation about = =E2=80=98when=E2=80=99 > > > > Hi, > > > > None of the operations that accept or return datastore contents expose th= e > datastore objects > > in the RPC parameters. They are always anyxml or anydata. This means tha= t > > there are no descendant data nodes defined at all according to the RPC > operation > > and therefore the constraints on those nodes do not exist in the RPC > operation either. > > > > > > > > On Mon, Sep 9, 2019 at 6:41 AM Rob Wilton (rwilton) > wrote: > > Hi Frank, > > > > My interpretation of what the expected behaviour is as follows. > > > > For =E2=80=9Cscene 1=E2=80=9D, the config change is accepted because the = result of the > config datastore after the edit-config has been applied is valid. > > > > For =E2=80=9Cscene 2=E2=80=9D, the config change is rejected because the = result of the > config datastore after the edit-config has been applied is invalid. > > > > My interpretation is that the block of text in 8.3.1 payload parsing is > primary intended to refer to RFC input. E.g. if the RPC was defined > something like below, then the =E2=80=98when=E2=80=99 rule in 8.3.1 would= enforce that a > zip-code can only be provided if the country is the USA. > > > > rpc rock-the-house { > > input { > > leaf country { > > type string; > > } > > leaf zip-code { > > when =E2=80=9C../country =3D =E2=80=98usa=E2=80=99=E2=80=9D; > > type string; > > } > > } > > } > > > > Thanks, > > Rob > > > > > > > > *From:* netmod *On Behalf Of *Fengchong (frank) > *Sent:* 06 September 2019 08:19 > *To:* netmod@ietf.org > *Cc:* Yangang > *Subject:* [netmod] Please clarify implementation about =E2=80=98when=E2= =80=99 > > > > Hi all, > > > > In RFC7950 secton 8, several description about when=EF=BC=9A > In section 8.2 . > Configuration Data Modifications > > o If a request modifies a configuration data node such that any > > node's "when" expression becomes false, then the node in the data > > tree with the "when" expression is deleted by the server. > In 8.3.1 . Payload > Parsing > > o If data for a node tagged with "when" is present and the "when" > > condition evaluates to "false", the server MUST reply with an > > "unknown-element" in the . > > In 8.3.2 . NETCONF > Processing > > Modification requests for nodes tagged with "when", and the "when" > > condition evaluates to "false". In this case, the server MUST > > reply with an "unknown-element" in the . > > > > YANG module=EF=BC=9A > > module foo { > > namespace =E2=80=9Chttp://foo.com=E2=80=9D; > > prefix =E2=80=9Cfoo=E2=80=9D; > > Leaf a {=E2=80=A6} > > Leaf b { > > When =E2=80=9Ca =3D 10=E2=80=9D; > > } > > } > Scene 1: > > The first edit-config request: > > > > > > > > > > > > 3 > > > > > > This request will set a =3D 3. > > > > The second request: > > > > > > > > > > > > 10 > > 5 > > > > > > > > According 8.3.1, in rpc payload parsing phase, the a=E2=80=99s value in c= andidate > datastore is 3,so leaf b=E2=80=99s when condition is evaluated to false, = server > will report =E2=80=98unknown-element=E2=80=99 error. > > Is it expected by user? > Scene 2: > > The first edit-config request: > > > > > > > > > > > > 10 > > > > > > This request will set a =3D 10. > > > > The second request: > > > > > > > > > > > > 3 > > 5 > > > > > > According 8.3.1, in rpc payload parsing phase, the a=E2=80=99s value in c= andidate > datastore is 10, so leaf b=E2=80=99s when condition is evaluated to true,= server > will accept this request in payload parsing phase. > > > > In edit-config request processing phase, if leaf a=E2=80=99s modification= is > processed firstly, the a=E2=80=99s value will be changed to 3, so the b= =E2=80=99s when > condition will be false, when server process b=E2=80=99s modification, b = will be > treated as unknown-element, the edit-config request will fail. > > If leaf b=E2=80=99s modification is processed firstly, server will accept= this > modification ,because b=E2=80=99s when condition is true, and when server= process > a=E2=80=99s modification , this modification will be accepted, and b=E2= =80=99s when > condition will be evaluated to false, leaf b will be deleted automaticall= y, > the edit-config request will be OK. > > > > How server should process this situation? > > > > _______________________________________________ > netmod mailing list > netmod@ietf.org > https://www.ietf.org/mailman/listinfo/netmod > > --00000000000030233a059362bd6a Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable


=
On Wed, Sep 25, 2019 at 8:44 AM Stern= e, Jason (Nokia - CA/Ottawa) <= jason.sterne@nokia.com> wrote:

Processing order should not matter. The evaluation of the 'wh= en' statement should be done assuming an atomic application of the edit= -config.

=C2=A0

I agree that a standards compliant server should do as Rob said:<= u>

=C2=A0

- For =E2=80=9Cscene 1=E2=80=9D, the config change is accepted be= cause the result of the config datastore after the edit-config has been app= lied is valid.

- For =E2=80=9Cscene 2=E2=80=9D, the config change is rejected be= cause the result of the config datastore after the edit-config has been app= lied is invalid.

=C2=A0

From an implementation that may indeed mean processing the 'w= hen' after a first pass that sets the various leafs to tentative values= . But that's implementation detail.

=C2=A0

IMO the auto-clearing behavior of 'when' may be complicat= ed but that is how it is defined (same with 'choice'). Clients can = and should depend on things being automatically deleted. If you want validation errors (i.e. fo= rce the client to clear all the dependant leafs instead of auto-clearing) t= hen use a 'must' statement.

=C2=A0


<= div>+1

YANG clearly defines "must" and &= quot;when" with different behavior.
A server that does not i= mplement the auto-delete aspects of when-stmt is not compliant to the RFC.<= /div>
=C2=A0

Jason


Andy=
=C2=A0

=C2=A0

From: netmod <netmod-bounces@ietf.org> On Behalf Of Qin Wu
Sent: Tuesday, September 10, 2019 10:33 PM
To: Fengchong (frank) <frank.fengchong@huawei.com>; Andy Bierman <= andy@yumaworks.com<= /a>>
Cc: netmod@ietf= .org; Yangang <yangang@huawei.com>
Subject: [netmod] =E7=AD=94=E5=A4=8D: =E7= =AD=94=E5=A4=8D: Please clarify implementation about =E2=80=98when= =E2=80=99

=C2=A0

Why processing order matter= ? My interpretation is both leaf node values (i.e.,leaf a, leaf b) should b= e validated together and commit as a whole,

RFC6241 said:=

=E2=80=9C

= If the device is unable to commit all of the changes in the

=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0 candidate configuration datastore, then the running

=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0 configuration MUST remain unchanged.

=E2=80=9D

So validate the leaf node v= alue in the edit-config request (message content validation) is not importa= nt, validate the leaf node value that is applied to <running> (datastore validation) = is the key.

=C2=A0= 

I think what you want to raise is the server =
should hold on to send reply with an "unknown-element" <error-=
tag> in the <rpc-error> during payload parsing phase and NETCONF &=
lt;edit-config> 
Processing until all validation complete, oth=
erwise it seems server will 
Send multiple rply with "unknown-element=
" <error-tag> in the <rpc-error> which seems not reasonabl=
e.
=C2=A0
-Qin

=E5=8F=91=E4=BB=B6=E4=BA=BA= : netmod [mailt= o:netmod-bounces@ietf.org] =E4=BB=A3=E8=A1=A8 Fengchong (frank)
=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4= : 2019=E5=B9=B49=E6=9C=8811<= span lang=3D"ZH-CN" style=3D"font-size:11pt;font-family:"Microsoft YaH= ei",sans-serif">=E6=97=A5 9:29
=E6=94=B6=E4=BB=B6=E4=BA=BA: Andy Bierman <a= ndy@yumaworks.com>
=E6=8A=84=E9=80=81: netmod@ietf.org; Y= angang <yangang@= huawei.com>
=E4=B8=BB=E9=A2=98: [netmod] =E7=AD=94=E5=A4=8D: Please clarify implementation about =E2=80=98= when=E2=80=99

=C2=A0

= Andy,

=C2=A0=

Whether different result wo= uld occur according different process order?

According 8.3.2

if server process =E2=80=98= a=3D 3=E2=80=99 firstly, b will be deleted by system and becomes a non-exist schema node, and then =C2=A0when =E2=80=98b=3D5=E2= =80=99 is processed , server will report a =E2=80=98unknown-element=E2=80= =99 error.

But if server process =E2= =80=98b=3D5=E2=80=99 firstly, it will be accepted by server, and then when =E2=80=98a=3D3=E2=80=99 is processed, b will be dele= ted by system, but report OK.

=C2=A0=

If sec 8.3.2 is not right. = What is the right?

When node a and node b in t= he same request, and b tagged when condition, a=E2=80=99s value will cause b=E2=80=99s condition is evaluated= to false, which is more prior?

According you and Rob=E2=80= =99s interpretation , maybe node =E2=80=99a=E2=80=99 is more prior? If yes, why node =E2=80=98b=E2=80=99 should be processed later= ?

=C2=A0=

I think whether in edit-con= fig processing phase the configuration tagged when should not be evaluated and be delayed to commit or validate?<= u>

When commit or validate ope= ration is issued,=C2=A0 the data node tagged when will be evaluated, and if it=E2=80=99s evaluated to false, thi= s data will be deleted by system immediately, server should not report any = error.

=C2=A0=

=C2=A0=

= =E5=8D=8E=E4=B8=BA=E6=8A=80=E6=9C=AF=E6=9C=89=E9=99=90=E5=85=AC=E5=8F=B8 Huawei Technologie= s Co., Ltd.

= 3D"Company_logo"=

= =E4=B8=AA=E4=BA=BA=E7=AD=BE=E5=90=8D=EF=BC=9A=E5=86=AF=E5=86=B2
=E6=89=8B=E3=80= =80=E3=80=80=E6=9C=BA=EF=BC=9A13776612983
=E7=94=B5=E5=AD= =90=E9=82=AE=E4=BB=B6=EF=BC=9Afrank.fengchong@huawei.com
=E5=85=AC=E5=8F= =B8=E7=BD=91=E5=9D=80=EF=BC=9Awww.huawe= i.com

=EF=BB=BF =E6=9C=AC= =E9=82=AE=E4=BB=B6=E5=8F=8A=E5=85=B6=E9=99=84=E4=BB=B6=E5=90=AB=E6=9C=89=E5= =8D=8E=E4=B8=BA=E5=85=AC=E5=8F=B8=E7=9A=84=E4=BF=9D=E5=AF=86=E4=BF=A1=E6=81= =AF=EF=BC=8C=E4=BB=85=E9=99=90=E4=BA=8E=E5=8F=91=E9=80=81=E7=BB=99=E4=B8=8A= =E9=9D=A2=E5=9C=B0=E5=9D=80=E4=B8=AD=E5=88=97=E5=87=BA=E7=9A=84=E4=B8=AA=E4= =BA=BA=E6=88=96=E7=BE=A4=E7=BB=84=E3=80=82=E7=A6=81
=E6=AD=A2= =E4=BB=BB=E4=BD=95=E5=85=B6=E4=BB=96=E4=BA=BA=E4=BB=A5=E4=BB=BB=E4=BD=95=E5= =BD=A2=E5=BC=8F=E4=BD=BF=E7=94=A8=EF=BC=88=E5=8C=85=E6=8B=AC=E4=BD=86=E4=B8= =8D=E9=99=90=E4=BA=8E=E5=85=A8=E9=83=A8=E6=88=96=E9=83=A8=E5=88=86=E5=9C=B0= =E6=B3=84=E9=9C=B2=E3=80=81=E5=A4=8D=E5=88=B6=E3=80=81=E6=88=96=E6=95=A3=E5= =8F=91=EF=BC=89=E6=9C=AC=E9=82=AE=E4=BB=B6=E4=B8=AD
=E7=9A=84= =E4=BF=A1=E6=81=AF=E3=80=82=E5=A6=82=E6=9E=9C=E6=82=A8=E9=94=99=E6=94=B6=E4= =BA=86=E6=9C=AC=E9=82=AE=E4=BB=B6=EF=BC=8C=E8=AF=B7=E6=82=A8=E7=AB=8B=E5=8D= =B3=E7=94=B5=E8=AF=9D=E6=88=96=E9=82=AE=E4=BB=B6=E9=80=9A=E7=9F=A5=E5=8F=91= =E4=BB=B6=E4=BA=BA=E5=B9=B6=E5=88=A0=E9=99=A4=E6=9C=AC=E9=82=AE=E4=BB=B6=EF= =BC=81
This e-mail and its attachments contain confidential information from HUAWE= I, which
is intended only for the person or entity whose address is listed above. An= y use of the
information contained herein in any way (including, but not limited to, tot= al or partial
disclosure, reproduction, or dissemination) by persons other than the inten= ded
recipient(s) is prohibited. If you receive this e-mail in error, please not= ify the sender by
phone or email immediately and delete it!

=C2=A0=

=E5=8F=91=E4=BB=B6=E4=BA=BA= : Andy Bierman [mail= to:andy@yumaworks.com]
=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4= : 2019=E5=B9=B49=E6=9C=8810<= span lang=3D"ZH-CN" style=3D"font-size:11pt;font-family:"Microsoft YaH= ei",sans-serif">=E6=97=A5 10:56
=E6=94=B6=E4=BB=B6=E4=BA=BA: Fengchong (frank) <frank.fengchong@huawei.com>
=E6=8A=84=E9=80=81: Rob Wilton (rwilton) <rwilton@cisco.com>; netmod@ietf.org; Y= angang <yangang@= huawei.com>
=E4=B8=BB=E9=A2=98: Re: [netmod] Please clarify implementation about =E2=80=98when= =E2=80=99

=C2=A0

=C2=A0=

=C2=A0

On Mon, Sep 9, 2019 at 7:40 PM = Fengchong (frank) <frank.fengchong@huawei.com> wrote:<= /p>

Andy,

Whether all constraints on = content in <config> parameter will not be evaluated in payload parsing phase, for example, a leaf=E2=80=99s v= alue exceed range?

Netconf server should treat= it as a block data?

=C2=A0

=C2=A0

Field validation and datastore = validation are 2 different things.

when-stmt processing is neither= . It is by far the hardest part of an automated server to get right.=

=C2=A0

Another question:

=C2=A0

In edit-config processing p= hase, whether constraints on content in <config> parameter needs be evaluated?

If yes, when =C2=A0configur= ation modification cause when condition is evaluated to false, the node tagged when will be automatically deleted = by system.

Then, in scene 2, whether d= ifferent result would occur according different process order?<= /p>

=C2=A0

=C2=A0

Since the <config> parame= ter is anyxml, the YANG constraints defined on datastore contents=

are not enforced as part of RPC= input validation.

=C2=A0

It would be nice if NETCONF def= ined behavior for providing <config> data that will get deleted

immediately by the server.=C2= =A0 We have a CLI parameter for this since some vendors want to

treat this as an error and othe= r just silently delete nodes.=C2=A0 Note that when-stmt can silently=

delete existing nodes not inclu= ded in the edit. (Lada does not agree this is how it should work,=

so we need yang-next to decide.= Maybe NETCONF needs a --force parameter for this purpose.)

=C2=A0

=C2=A0

Andy

=C2=A0

=C2=A0

=C2=A0

= =E5=8D=8E=E4=B8=BA=E6=8A=80=E6=9C=AF=E6=9C=89=E9=99=90=E5=85=AC=E5=8F=B8 Huawei Technologie= s Co., Ltd.

= 3D"Company=

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This e-mail and its attachments contain confidential information from HUAWE= I, which
is intended only for the person or entity whose address is listed above. An= y use of the
information contained herein in any way (including, but not limited to, tot= al or partial
disclosure, reproduction, or dissemination) by persons other than the inten= ded
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phone or email immediately and delete it!

=C2=A0

=E5=8F=91=E4=BB=B6=E4=BA=BA= : Andy Bierman [mailto:andy@yumaworks.com]
=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4= : 2019=E5=B9=B49=E6=9C=8810<= span lang=3D"ZH-CN" style=3D"font-size:11pt;font-family:"Microsoft YaH= ei",sans-serif">=E6=97=A5 10:19
=E6=94=B6=E4=BB=B6=E4=BA=BA: Fengchong (frank) <frank.fengchong@huawei.com>
=E6=8A=84=E9=80=81: Rob Wilton (rwilton) <rwilton@cisco.com>; netmod@ietf.org; Y= angang <yangang@= huawei.com>
=E4=B8=BB=E9=A2=98: Re: [netmod] Please clarify implementation about =E2=80=98when= =E2=80=99

=C2=A0

=C2=A0

=C2=A0

On Mon, Sep 9, 2019 at 7:10 PM = Fengchong (frank) <frank.fengchong@huawei.com> wrote:

Hi andy,

=C2=A0

You only talk about the con= straints on rpc operation=E2=80=99s parameter?<= u>

=C2=A0

Do you have any opinion abo= ut my question?

=C2=A0

8.3.1 does not apply to leaf &#= 39;b'.

The RPC parameter is called = 9;config'.

It has no when-stmts to evaluat= e.

Rob is correct.

His example shows what 8.3.1 wo= uld cover.

=C2=A0

Andy

=C2=A0

=C2=A0

=C2=A0

= =E5=8D=8E=E4=B8=BA=E6=8A=80=E6=9C=AF=E6=9C=89=E9=99=90=E5=85=AC=E5=8F=B8 Huawei Technologie= s Co., Ltd.

= 3D"Company_logo"

= =E4=B8=AA=E4=BA=BA=E7=AD=BE=E5=90=8D=EF=BC=9A=E5=86=AF=E5=86=B2
=E6=89=8B=E3=80= =80=E3=80=80=E6=9C=BA=EF=BC=9A13776612983
=E7=94=B5=E5=AD= =90=E9=82=AE=E4=BB=B6=EF=BC=9Afrank.fengchong@huawei.com
=E5=85=AC=E5=8F= =B8=E7=BD=91=E5=9D=80=EF=BC=9Awww.huawe= i.com

=EF=BB=BF =E6=9C=AC= =E9=82=AE=E4=BB=B6=E5=8F=8A=E5=85=B6=E9=99=84=E4=BB=B6=E5=90=AB=E6=9C=89=E5= =8D=8E=E4=B8=BA=E5=85=AC=E5=8F=B8=E7=9A=84=E4=BF=9D=E5=AF=86=E4=BF=A1=E6=81= =AF=EF=BC=8C=E4=BB=85=E9=99=90=E4=BA=8E=E5=8F=91=E9=80=81=E7=BB=99=E4=B8=8A= =E9=9D=A2=E5=9C=B0=E5=9D=80=E4=B8=AD=E5=88=97=E5=87=BA=E7=9A=84=E4=B8=AA=E4= =BA=BA=E6=88=96=E7=BE=A4=E7=BB=84=E3=80=82=E7=A6=81
=E6=AD=A2= =E4=BB=BB=E4=BD=95=E5=85=B6=E4=BB=96=E4=BA=BA=E4=BB=A5=E4=BB=BB=E4=BD=95=E5= =BD=A2=E5=BC=8F=E4=BD=BF=E7=94=A8=EF=BC=88=E5=8C=85=E6=8B=AC=E4=BD=86=E4=B8= =8D=E9=99=90=E4=BA=8E=E5=85=A8=E9=83=A8=E6=88=96=E9=83=A8=E5=88=86=E5=9C=B0= =E6=B3=84=E9=9C=B2=E3=80=81=E5=A4=8D=E5=88=B6=E3=80=81=E6=88=96=E6=95=A3=E5= =8F=91=EF=BC=89=E6=9C=AC=E9=82=AE=E4=BB=B6=E4=B8=AD
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This e-mail and its attachments contain confidential information from HUAWE= I, which
is intended only for the person or entity whose address is listed above. An= y use of the
information contained herein in any way (including, but not limited to, tot= al or partial
disclosure, reproduction, or dissemination) by persons other than the inten= ded
recipient(s) is prohibited. If you receive this e-mail in error, please not= ify the sender by
phone or email immediately and delete it!

=C2=A0

=E5=8F=91=E4=BB=B6=E4=BA=BA= : Andy Bierman [mailto:andy@yumaworks.com]
=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4= : 2019=E5=B9=B49=E6=9C=8810<= span lang=3D"ZH-CN" style=3D"font-size:11pt;font-family:"Microsoft YaH= ei",sans-serif">=E6=97=A5 1:14
=E6=94=B6=E4=BB=B6=E4=BA=BA: Rob Wilton (rwilton) <rwilton@cisco.com>
=E6=8A=84=E9=80=81: Fengchong (frank) <frank.fengchong@huawei.com>; netmod@ietf.org; Y= angang <yangang@= huawei.com>
=E4=B8=BB=E9=A2=98: Re: [netmod] Please clarify implementation about =E2=80=98when= =E2=80=99

=C2=A0

Hi,

=C2=A0

None of the operations that acc= ept or return datastore contents expose the datastore objects=

in the RPC parameters.=C2=A0 Th= ey are always anyxml or anydata. This means that

there are no descendant data no= des defined at all according to the RPC operation

and therefore the constraints o= n those nodes do not exist in the RPC operation either.

=C2=A0

=C2=A0

=C2=A0

On Mon, Sep 9, 2019 at 6:41 AM = Rob Wilton (rwilton) <rwilton@cisco.com> wrote:

Hi Fra= nk,

=C2=A0=

My int= erpretation of what the expected behaviour is as follows.

=C2=A0=

For =E2=80=9Cscene 1=E2=80=9D, the config change is accepted because the result of the config datastore a= fter the edit-config has been applied is valid.=

=C2=A0=

For =E2=80=9Cscene 2=E2=80=9D, the config change is rejected because the result of the config datastore a= fter the edit-config has been applied is invalid.

=C2=A0=

My int= erpretation is that the block of text in 8.3.1 payload parsing is primary i= ntended to refer to RFC input.=C2=A0 E.g. if the RPC was defined something like below, then the =E2=80=98when=E2=80=99 rule in 8.3.1 would enforce that a zip-code can only be provided if the co= untry is the USA.

=C2=A0=

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0 rpc rock-the-house {

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0 input {

=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0leaf country {=

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 type string;

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0 }

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0 leaf zip-code {<= /u>

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 when =E2=80=9C../country =3D =E2=80= =98usa=E2=80=99=E2=80=9D;<= /p>

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 type string;

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0 }

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0 }

=C2=A0 =C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0}

=C2=A0=

Thanks= ,

Rob

=C2=A0=

=C2=A0=

=C2=A0=

Fro= m: netmod <netmod-bounces@iet= f.org> On Behalf Of Fengchong (frank)
Sent: 06 September 2019 08:19
To: netmod@ietf= .org
Cc: Yangang <yangang@huawei.com>
Subject: [netmod] Please clarify implementation about =E2=80=98when=E2=80=99

=C2=A0

Hi all,

=C2=A0

In RFC7950 secton 8, several de= scription about when=EF=BC=9A

In section 8.2.=C2=A0 Configuration Data Modi= fications

=C2=A0=C2=A0 o=C2=A0 If a request modifies a configuration data node = such that any

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 node's "when" expression= becomes false, then the node in the data

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 tree with the "when" express= ion is deleted by the server.

In 8.3.1.=C2=A0= Payload Parsing

=C2=A0=C2=A0=
 o=C2=A0 If data for a node tagged with "when" is present and the=
 "when"
=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0 condition evaluates to "false", the server MUS=
T reply with an
=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0 "unknown-element" <error-tag> in the <=
;rpc-error>.

In 8.3.2.=C2= =A0 NETCONF <edit-config> Processing<= u>

Modification=
 requests for nodes tagged with "when", and the "when"<=
/span>
=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0 condition evaluates to "false".=C2=A0 In this =
case, the server MUST

=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0 reply with an "unknown-element" <error-tag&=
gt; in the <rpc-error>.


=C2=A0


YANG module=EF=BC=9A


module foo {


=C2=A0=C2=A0 namespace
=E2=80=9Chttp://foo.com=E2=80=9D;


=C2=A0=C2=A0 prefix
=E2=80=9Cfoo=
=E2=80=9D;



Leaf a {=E2=80=A6}



Leaf b {



=C2=A0 When =E2=80=9Ca =3D 10=E2=80=9D=
;



}


}


Scene 1: 


The first edit-config request:<=
u>


<edit-config>


=C2=A0=C2=A0 <target><=
/u>


=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
<candidate/>


=C2=A0=C2=A0 </target>



=C2=A0=C2=A0=C2=A0<config>=
;


=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
<a xmlns=3D
=E2=80=9Chttp://foo.com=E2=80=9D>3</a>


=C2=A0=C2=A0 </config>=



</edit-config><=
/u>


This request will set a =3D 3.<=
u>


=C2=A0


The second request:


<edit-config>


=C2=A0=C2=A0 <target><=
/u>


=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
<candidate/>


=C2=A0=C2=A0 </target>



=C2=A0=C2=A0=C2=A0<config>=
;


=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
<a xmlns=3D
=E2=80=9Chttp://foo.com=E2=80=9D>10</a>


=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
<b xmlns=3D
=E2=80=9Chttp://foo.com=E2=80=9D>5</b>


=C2=A0=C2=A0 </config>=



</edit-config><=
/u>


=C2=A0


Accord=
ing 8.3.1, in rpc payload parsing phase, the a=E2=80=99s
 value in candidate datastore is 3,so leaf b=E2=80=99s when condition is evaluated to false, server will report
=E2=80=98unknown-element=E2=80=99
 error.


Is it =
expected by user?


Scene 2:


The first edit-config request:<=
u>


<edit-config>


=C2=A0=C2=A0 <target><=
/u>


=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
<candidate/>


=C2=A0=C2=A0 </target>



=C2=A0=C2=A0=C2=A0<config>=
;


=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
<a xmlns=3D
=E2=80=9Chttp://foo.com=E2=80=9D>10</a>


=C2=A0=C2=A0 </config>=



</edit-config><=
/u>


This request will set a =3D 10.=



=C2=A0


The second request:


<edit-config>


=C2=A0=C2=A0 <target><=
/u>


=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
<candidate/>


=C2=A0=C2=A0 </target>



=C2=A0=C2=A0=C2=A0<config>=
;


=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
<a xmlns=3D
=E2=80=9Chttp://foo.com=E2=80=9D>3</a>


=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
<b xmlns=3D
=E2=80=9Chttp://foo.com=E2=80=9D>5</b>


=C2=A0=C2=A0 </config>=



</edit-config><=
/u>


Accord=
ing 8.3.1, in rpc payload parsing phase, the a=E2=80=99s
 value in candidate datastore is 10, so leaf b=E2=80=99s when condition is evaluated to true, server will accept
 this request in payload parsing phase. =



=C2=A0=



In edi=
t-config request processing phase, if leaf a=E2=80=99s
 modification is processed firstly, the a=E2=80=99s value will be changed to 3, so the b=E2=80=99s
 when condition will be false, when server process b=E2=80=99s modification, b will be treated as unknown-element,
 the edit-config request will fail. <=
/u>


If lea=
f b=E2=80=99s
 modification is processed firstly, server will accept this modification ,b=
ecause b=E2=80=99s when condition
 is true, and when server process a=E2=80=99=
s modification , this modification will be accepted, and b=E2=80=99s
 when condition will be evaluated to false, leaf b will be deleted automati=
cally, the edit-config request will be OK.


=C2=A0=



How se=
rver should process this situation?


=C2=A0

_______________________________= ________________
netmod mailing list
netmod@ietf.org = https://www.ietf.org/mailman/listinfo/netmod

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Date: Wed, 25 Sep 2019 09:00:17 -0700 Message-ID: To: "Sterne, Jason (Nokia - CA/Ottawa)" Cc: Qin Wu , "Fengchong (frank)" , "netmod@ietf.org" , Yangang Content-Type: multipart/related; boundary="000000000000800585059362c0b5" Archived-At: Subject: Re: [netmod] =?utf-8?b?562U5aSNOiDnrZTlpI06IFBsZWFzZSBjbGFyaWZ5IGlt?= =?utf-8?b?cGxlbWVudGF0aW9uIGFib3V0IOKAmHdoZW7igJk=?= X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 25 Sep 2019 16:00:38 -0000 --000000000000800585059362c0b5 Content-Type: multipart/alternative; boundary="000000000000800584059362c0b4" --000000000000800584059362c0b4 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Wed, Sep 25, 2019 at 8:59 AM Andy Bierman wrote: > > > On Wed, Sep 25, 2019 at 8:44 AM Sterne, Jason (Nokia - CA/Ottawa) < > jason.sterne@nokia.com> wrote: > >> Processing order should not matter. The evaluation of the 'when' >> statement should be done assuming an atomic application of the edit-conf= ig. >> >> >> >> I agree that a standards compliant server should do as Rob said: >> >> >> >> - For =E2=80=9Cscene 1=E2=80=9D, the config change is accepted because t= he result of the >> config datastore after the edit-config has been applied is valid. >> >> - For =E2=80=9Cscene 2=E2=80=9D, the config change is rejected because t= he result of the >> config datastore after the edit-config has been applied is invalid. >> >> >> >> From an implementation that may indeed mean processing the 'when' after = a >> first pass that sets the various leafs to tentative values. But that's >> implementation detail. >> >> >> >> IMO the auto-clearing behavior of 'when' may be complicated but that is >> how it is defined (same with 'choice'). Clients can and should depend on >> things being automatically deleted. If you want validation errors (i.e. >> force the client to clear all the dependant leafs instead of auto-cleari= ng) >> then use a 'must' statement. >> >> >> > > +1 > > YANG clearly defines "must" and "when" with different behavior. > A server that does not implement the auto-delete aspects of when-stmt is > not compliant to the RFC. > > oops -- s/must-stmt/when-stmt/ > Jason >> > > Andy > > >> >> >> *From:* netmod *On Behalf Of *Qin Wu >> *Sent:* Tuesday, September 10, 2019 10:33 PM >> *To:* Fengchong (frank) ; Andy Bierman < >> andy@yumaworks.com> >> *Cc:* netmod@ietf.org; Yangang >> *Subject:* [netmod] =E7=AD=94=E5=A4=8D: =E7=AD=94=E5=A4=8D: Please clari= fy implementation about =E2=80=98when=E2=80=99 >> >> >> >> Why processing order matter? My interpretation is both leaf node values >> (i.e.,leaf a, leaf b) should be validated together and commit as a whole= , >> >> RFC6241 said: >> >> =E2=80=9C >> >> If the device is unable to commit all of the changes in the >> >> candidate configuration datastore, then the running >> >> configuration MUST remain unchanged. >> >> =E2=80=9D >> >> So validate the leaf node value in the edit-config request (message >> content validation) is not important, validate the leaf node value that = is >> applied to (datastore validation) is the key. >> >> >> >> I think what you want to raise is the server should hold on to send repl= y with an "unknown-element" in the during payload p= arsing phase and NETCONF >> >> Processing until all validation complete, otherwise it seems server will >> >> Send multiple rply with "unknown-element" in the = which seems not reasonable. >> >> >> >> -Qin >> >> *=E5=8F=91=E4=BB=B6=E4=BA=BA**:* netmod [mailto:netmod-bounces@ietf.org = ] >> *=E4=BB=A3=E8=A1=A8 *Fengchong (frank) >> *=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4**:* 2019=E5=B9=B49=E6=9C=8811=E6= =97=A5 9:29 >> *=E6=94=B6=E4=BB=B6=E4=BA=BA**:* Andy Bierman >> *=E6=8A=84=E9=80=81**:* netmod@ietf.org; Yangang >> *=E4=B8=BB=E9=A2=98**:* [netmod] =E7=AD=94=E5=A4=8D: Please clarify impl= ementation about =E2=80=98when=E2=80=99 >> >> >> >> Andy, >> >> >> >> Whether different result would occur according different process order? >> >> According 8.3.2 >> >> if server process =E2=80=98a=3D 3=E2=80=99 firstly, b will be deleted by= system and becomes >> a non-exist schema node, and then when =E2=80=98b=3D5=E2=80=99 is proce= ssed , server will >> report a =E2=80=98unknown-element=E2=80=99 error. >> >> But if server process =E2=80=98b=3D5=E2=80=99 firstly, it will be accept= ed by server, and >> then when =E2=80=98a=3D3=E2=80=99 is processed, b will be deleted by sys= tem, but report OK. >> >> >> >> If sec 8.3.2 is not right. What is the right? >> >> When node a and node b in the same request, and b tagged when condition, >> a=E2=80=99s value will cause b=E2=80=99s condition is evaluated to false= , which is more >> prior? >> >> According you and Rob=E2=80=99s interpretation , maybe node =E2=80=99a= =E2=80=99 is more prior? If >> yes, why node =E2=80=98b=E2=80=99 should be processed later? >> >> >> >> I think whether in edit-config processing phase the configuration tagged >> when should not be evaluated and be delayed to commit or validate? >> >> When commit or validate operation is issued, the data node tagged when >> will be evaluated, and if it=E2=80=99s evaluated to false, this data wil= l be >> deleted by system immediately, server should not report any error. >> >> >> >> >> ------------------------------ >> >> =E5=8D=8E=E4=B8=BA=E6=8A=80=E6=9C=AF=E6=9C=89=E9=99=90=E5=85=AC=E5=8F=B8= Huawei Technologies Co., Ltd. >> >> [image: Company_logo] >> >> =E4=B8=AA=E4=BA=BA=E7=AD=BE=E5=90=8D=EF=BC=9A=E5=86=AF=E5=86=B2 >> =E6=89=8B =E6=9C=BA=EF=BC=9A13776612983 >> =E7=94=B5=E5=AD=90=E9=82=AE=E4=BB=B6=EF=BC=9Afrank.fengchong@huawei.com >> =E5=85=AC=E5=8F=B8=E7=BD=91=E5=9D=80=EF=BC=9Awww.huawei.com >> ------------------------------ >> >> =EF=BB=BF =E6=9C=AC=E9=82=AE=E4=BB=B6=E5=8F=8A=E5=85=B6=E9=99=84=E4=BB= =B6=E5=90=AB=E6=9C=89=E5=8D=8E=E4=B8=BA=E5=85=AC=E5=8F=B8=E7=9A=84=E4=BF=9D= =E5=AF=86=E4=BF=A1=E6=81=AF=EF=BC=8C=E4=BB=85=E9=99=90=E4=BA=8E=E5=8F=91=E9= =80=81=E7=BB=99=E4=B8=8A=E9=9D=A2=E5=9C=B0=E5=9D=80=E4=B8=AD=E5=88=97=E5=87= =BA=E7=9A=84=E4=B8=AA=E4=BA=BA=E6=88=96=E7=BE=A4=E7=BB=84=E3=80=82=E7=A6=81 >> =E6=AD=A2=E4=BB=BB=E4=BD=95=E5=85=B6=E4=BB=96=E4=BA=BA=E4=BB=A5=E4=BB=BB= =E4=BD=95=E5=BD=A2=E5=BC=8F=E4=BD=BF=E7=94=A8=EF=BC=88=E5=8C=85=E6=8B=AC=E4= =BD=86=E4=B8=8D=E9=99=90=E4=BA=8E=E5=85=A8=E9=83=A8=E6=88=96=E9=83=A8=E5=88= =86=E5=9C=B0=E6=B3=84=E9=9C=B2=E3=80=81=E5=A4=8D=E5=88=B6=E3=80=81=E6=88=96= =E6=95=A3=E5=8F=91=EF=BC=89=E6=9C=AC=E9=82=AE=E4=BB=B6=E4=B8=AD >> =E7=9A=84=E4=BF=A1=E6=81=AF=E3=80=82=E5=A6=82=E6=9E=9C=E6=82=A8=E9=94=99= =E6=94=B6=E4=BA=86=E6=9C=AC=E9=82=AE=E4=BB=B6=EF=BC=8C=E8=AF=B7=E6=82=A8=E7= =AB=8B=E5=8D=B3=E7=94=B5=E8=AF=9D=E6=88=96=E9=82=AE=E4=BB=B6=E9=80=9A=E7=9F= =A5=E5=8F=91=E4=BB=B6=E4=BA=BA=E5=B9=B6=E5=88=A0=E9=99=A4=E6=9C=AC=E9=82=AE= =E4=BB=B6=EF=BC=81 >> This e-mail and its attachments contain confidential information from >> HUAWEI, which >> is intended only for the person or entity whose address is listed above. >> Any use of the >> information contained herein in any way (including, but not limited to, >> total or partial >> disclosure, reproduction, or dissemination) by persons other than the >> intended >> recipient(s) is prohibited. If you receive this e-mail in error, please >> notify the sender by >> phone or email immediately and delete it! >> >> >> >> *=E5=8F=91=E4=BB=B6=E4=BA=BA**:* Andy Bierman [mailto:andy@yumaworks.com= ] >> *=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4**:* 2019=E5=B9=B49=E6=9C=8810=E6= =97=A5 10:56 >> *=E6=94=B6=E4=BB=B6=E4=BA=BA**:* Fengchong (frank) >> *=E6=8A=84=E9=80=81**:* Rob Wilton (rwilton) ; netmod= @ietf.org; >> Yangang >> *=E4=B8=BB=E9=A2=98**:* Re: [netmod] Please clarify implementation about= =E2=80=98when=E2=80=99 >> >> >> >> >> >> >> >> On Mon, Sep 9, 2019 at 7:40 PM Fengchong (frank) < >> frank.fengchong@huawei.com> wrote: >> >> Andy, >> >> Whether all constraints on content in parameter will not be >> evaluated in payload parsing phase, for example, a leaf=E2=80=99s value = exceed >> range? >> >> Netconf server should treat it as a block data? >> >> >> >> >> >> Field validation and datastore validation are 2 different things. >> >> when-stmt processing is neither. It is by far the hardest part of an >> automated server to get right. >> >> >> >> Another question: >> >> >> >> In edit-config processing phase, whether constraints on content in >> parameter needs be evaluated? >> >> If yes, when configuration modification cause when condition is >> evaluated to false, the node tagged when will be automatically deleted b= y >> system. >> >> Then, in scene 2, whether different result would occur according >> different process order? >> >> >> >> >> >> Since the parameter is anyxml, the YANG constraints defined on >> datastore contents >> >> are not enforced as part of RPC input validation. >> >> >> >> It would be nice if NETCONF defined behavior for providing data >> that will get deleted >> >> immediately by the server. We have a CLI parameter for this since some >> vendors want to >> >> treat this as an error and other just silently delete nodes. Note that >> when-stmt can silently >> >> delete existing nodes not included in the edit. (Lada does not agree thi= s >> is how it should work, >> >> so we need yang-next to decide. Maybe NETCONF needs a --force parameter >> for this purpose.) >> >> >> >> >> >> Andy >> >> >> >> >> >> >> ------------------------------ >> >> =E5=8D=8E=E4=B8=BA=E6=8A=80=E6=9C=AF=E6=9C=89=E9=99=90=E5=85=AC=E5=8F=B8= Huawei Technologies Co., Ltd. >> >> [image: Company_logo] >> >> =E4=B8=AA=E4=BA=BA=E7=AD=BE=E5=90=8D=EF=BC=9A=E5=86=AF=E5=86=B2 >> =E6=89=8B =E6=9C=BA=EF=BC=9A13776612983 >> =E7=94=B5=E5=AD=90=E9=82=AE=E4=BB=B6=EF=BC=9Afrank.fengchong@huawei.com >> =E5=85=AC=E5=8F=B8=E7=BD=91=E5=9D=80=EF=BC=9Awww.huawei.com >> ------------------------------ >> >> =EF=BB=BF =E6=9C=AC=E9=82=AE=E4=BB=B6=E5=8F=8A=E5=85=B6=E9=99=84=E4=BB= =B6=E5=90=AB=E6=9C=89=E5=8D=8E=E4=B8=BA=E5=85=AC=E5=8F=B8=E7=9A=84=E4=BF=9D= =E5=AF=86=E4=BF=A1=E6=81=AF=EF=BC=8C=E4=BB=85=E9=99=90=E4=BA=8E=E5=8F=91=E9= =80=81=E7=BB=99=E4=B8=8A=E9=9D=A2=E5=9C=B0=E5=9D=80=E4=B8=AD=E5=88=97=E5=87= =BA=E7=9A=84=E4=B8=AA=E4=BA=BA=E6=88=96=E7=BE=A4=E7=BB=84=E3=80=82=E7=A6=81 >> =E6=AD=A2=E4=BB=BB=E4=BD=95=E5=85=B6=E4=BB=96=E4=BA=BA=E4=BB=A5=E4=BB=BB= =E4=BD=95=E5=BD=A2=E5=BC=8F=E4=BD=BF=E7=94=A8=EF=BC=88=E5=8C=85=E6=8B=AC=E4= =BD=86=E4=B8=8D=E9=99=90=E4=BA=8E=E5=85=A8=E9=83=A8=E6=88=96=E9=83=A8=E5=88= =86=E5=9C=B0=E6=B3=84=E9=9C=B2=E3=80=81=E5=A4=8D=E5=88=B6=E3=80=81=E6=88=96= =E6=95=A3=E5=8F=91=EF=BC=89=E6=9C=AC=E9=82=AE=E4=BB=B6=E4=B8=AD >> =E7=9A=84=E4=BF=A1=E6=81=AF=E3=80=82=E5=A6=82=E6=9E=9C=E6=82=A8=E9=94=99= =E6=94=B6=E4=BA=86=E6=9C=AC=E9=82=AE=E4=BB=B6=EF=BC=8C=E8=AF=B7=E6=82=A8=E7= =AB=8B=E5=8D=B3=E7=94=B5=E8=AF=9D=E6=88=96=E9=82=AE=E4=BB=B6=E9=80=9A=E7=9F= =A5=E5=8F=91=E4=BB=B6=E4=BA=BA=E5=B9=B6=E5=88=A0=E9=99=A4=E6=9C=AC=E9=82=AE= =E4=BB=B6=EF=BC=81 >> This e-mail and its attachments contain confidential information from >> HUAWEI, which >> is intended only for the person or entity whose address is listed above. >> Any use of the >> information contained herein in any way (including, but not limited to, >> total or partial >> disclosure, reproduction, or dissemination) by persons other than the >> intended >> recipient(s) is prohibited. If you receive this e-mail in error, please >> notify the sender by >> phone or email immediately and delete it! >> >> >> >> *=E5=8F=91=E4=BB=B6=E4=BA=BA**:* Andy Bierman [mailto:andy@yumaworks.com= ] >> *=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4**:* 2019=E5=B9=B49=E6=9C=8810=E6= =97=A5 10:19 >> *=E6=94=B6=E4=BB=B6=E4=BA=BA**:* Fengchong (frank) >> *=E6=8A=84=E9=80=81**:* Rob Wilton (rwilton) ; netmod= @ietf.org; >> Yangang >> *=E4=B8=BB=E9=A2=98**:* Re: [netmod] Please clarify implementation about= =E2=80=98when=E2=80=99 >> >> >> >> >> >> >> >> On Mon, Sep 9, 2019 at 7:10 PM Fengchong (frank) < >> frank.fengchong@huawei.com> wrote: >> >> Hi andy, >> >> >> >> You only talk about the constraints on rpc operation=E2=80=99s parameter= ? >> >> >> >> Do you have any opinion about my question? >> >> >> >> 8.3.1 does not apply to leaf 'b'. >> >> The RPC parameter is called 'config'. >> >> It has no when-stmts to evaluate. >> >> Rob is correct. >> >> His example shows what 8.3.1 would cover. >> >> >> >> Andy >> >> >> >> >> >> >> ------------------------------ >> >> =E5=8D=8E=E4=B8=BA=E6=8A=80=E6=9C=AF=E6=9C=89=E9=99=90=E5=85=AC=E5=8F=B8= Huawei Technologies Co., Ltd. >> >> [image: Company_logo] >> >> =E4=B8=AA=E4=BA=BA=E7=AD=BE=E5=90=8D=EF=BC=9A=E5=86=AF=E5=86=B2 >> =E6=89=8B =E6=9C=BA=EF=BC=9A13776612983 >> =E7=94=B5=E5=AD=90=E9=82=AE=E4=BB=B6=EF=BC=9Afrank.fengchong@huawei.com >> =E5=85=AC=E5=8F=B8=E7=BD=91=E5=9D=80=EF=BC=9Awww.huawei.com >> ------------------------------ >> >> =EF=BB=BF =E6=9C=AC=E9=82=AE=E4=BB=B6=E5=8F=8A=E5=85=B6=E9=99=84=E4=BB= =B6=E5=90=AB=E6=9C=89=E5=8D=8E=E4=B8=BA=E5=85=AC=E5=8F=B8=E7=9A=84=E4=BF=9D= =E5=AF=86=E4=BF=A1=E6=81=AF=EF=BC=8C=E4=BB=85=E9=99=90=E4=BA=8E=E5=8F=91=E9= =80=81=E7=BB=99=E4=B8=8A=E9=9D=A2=E5=9C=B0=E5=9D=80=E4=B8=AD=E5=88=97=E5=87= =BA=E7=9A=84=E4=B8=AA=E4=BA=BA=E6=88=96=E7=BE=A4=E7=BB=84=E3=80=82=E7=A6=81 >> =E6=AD=A2=E4=BB=BB=E4=BD=95=E5=85=B6=E4=BB=96=E4=BA=BA=E4=BB=A5=E4=BB=BB= =E4=BD=95=E5=BD=A2=E5=BC=8F=E4=BD=BF=E7=94=A8=EF=BC=88=E5=8C=85=E6=8B=AC=E4= =BD=86=E4=B8=8D=E9=99=90=E4=BA=8E=E5=85=A8=E9=83=A8=E6=88=96=E9=83=A8=E5=88= =86=E5=9C=B0=E6=B3=84=E9=9C=B2=E3=80=81=E5=A4=8D=E5=88=B6=E3=80=81=E6=88=96= =E6=95=A3=E5=8F=91=EF=BC=89=E6=9C=AC=E9=82=AE=E4=BB=B6=E4=B8=AD >> =E7=9A=84=E4=BF=A1=E6=81=AF=E3=80=82=E5=A6=82=E6=9E=9C=E6=82=A8=E9=94=99= =E6=94=B6=E4=BA=86=E6=9C=AC=E9=82=AE=E4=BB=B6=EF=BC=8C=E8=AF=B7=E6=82=A8=E7= =AB=8B=E5=8D=B3=E7=94=B5=E8=AF=9D=E6=88=96=E9=82=AE=E4=BB=B6=E9=80=9A=E7=9F= =A5=E5=8F=91=E4=BB=B6=E4=BA=BA=E5=B9=B6=E5=88=A0=E9=99=A4=E6=9C=AC=E9=82=AE= =E4=BB=B6=EF=BC=81 >> This e-mail and its attachments contain confidential information from >> HUAWEI, which >> is intended only for the person or entity whose address is listed above. >> Any use of the >> information contained herein in any way (including, but not limited to, >> total or partial >> disclosure, reproduction, or dissemination) by persons other than the >> intended >> recipient(s) is prohibited. If you receive this e-mail in error, please >> notify the sender by >> phone or email immediately and delete it! >> >> >> >> *=E5=8F=91=E4=BB=B6=E4=BA=BA**:* Andy Bierman [mailto:andy@yumaworks.com= ] >> *=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4**:* 2019=E5=B9=B49=E6=9C=8810=E6= =97=A5 1:14 >> *=E6=94=B6=E4=BB=B6=E4=BA=BA**:* Rob Wilton (rwilton) >> *=E6=8A=84=E9=80=81**:* Fengchong (frank) ; = netmod@ietf.org; >> Yangang >> *=E4=B8=BB=E9=A2=98**:* Re: [netmod] Please clarify implementation about= =E2=80=98when=E2=80=99 >> >> >> >> Hi, >> >> >> >> None of the operations that accept or return datastore contents expose >> the datastore objects >> >> in the RPC parameters. They are always anyxml or anydata. This means th= at >> >> there are no descendant data nodes defined at all according to the RPC >> operation >> >> and therefore the constraints on those nodes do not exist in the RPC >> operation either. >> >> >> >> >> >> >> >> On Mon, Sep 9, 2019 at 6:41 AM Rob Wilton (rwilton) >> wrote: >> >> Hi Frank, >> >> >> >> My interpretation of what the expected behaviour is as follows. >> >> >> >> For =E2=80=9Cscene 1=E2=80=9D, the config change is accepted because the= result of the >> config datastore after the edit-config has been applied is valid. >> >> >> >> For =E2=80=9Cscene 2=E2=80=9D, the config change is rejected because the= result of the >> config datastore after the edit-config has been applied is invalid. >> >> >> >> My interpretation is that the block of text in 8.3.1 payload parsing is >> primary intended to refer to RFC input. E.g. if the RPC was defined >> something like below, then the =E2=80=98when=E2=80=99 rule in 8.3.1 woul= d enforce that a >> zip-code can only be provided if the country is the USA. >> >> >> >> rpc rock-the-house { >> >> input { >> >> leaf country { >> >> type string; >> >> } >> >> leaf zip-code { >> >> when =E2=80=9C../country =3D =E2=80=98usa=E2=80=99=E2=80=9D= ; >> >> type string; >> >> } >> >> } >> >> } >> >> >> >> Thanks, >> >> Rob >> >> >> >> >> >> >> >> *From:* netmod *On Behalf Of *Fengchong (frank= ) >> *Sent:* 06 September 2019 08:19 >> *To:* netmod@ietf.org >> *Cc:* Yangang >> *Subject:* [netmod] Please clarify implementation about =E2=80=98when=E2= =80=99 >> >> >> >> Hi all, >> >> >> >> In RFC7950 secton 8, several description about when=EF=BC=9A >> In section 8.2 . >> Configuration Data Modifications >> >> o If a request modifies a configuration data node such that any >> >> node's "when" expression becomes false, then the node in the data >> >> tree with the "when" expression is deleted by the server. >> In 8.3.1 . Payload >> Parsing >> >> o If data for a node tagged with "when" is present and the "when" >> >> condition evaluates to "false", the server MUST reply with an >> >> "unknown-element" in the . >> >> In 8.3.2 . NETCONF >> Processing >> >> Modification requests for nodes tagged with "when", and the "when" >> >> condition evaluates to "false". In this case, the server MUST >> >> reply with an "unknown-element" in the . >> >> >> >> YANG module=EF=BC=9A >> >> module foo { >> >> namespace =E2=80=9Chttp://foo.com=E2=80=9D; >> >> prefix =E2=80=9Cfoo=E2=80=9D; >> >> Leaf a {=E2=80=A6} >> >> Leaf b { >> >> When =E2=80=9Ca =3D 10=E2=80=9D; >> >> } >> >> } >> Scene 1: >> >> The first edit-config request: >> >> >> >> >> >> >> >> >> >> >> >> 3 >> >> >> >> >> >> This request will set a =3D 3. >> >> >> >> The second request: >> >> >> >> >> >> >> >> >> >> >> >> 10 >> >> 5 >> >> >> >> >> >> >> >> According 8.3.1, in rpc payload parsing phase, the a=E2=80=99s value in >> candidate datastore is 3,so leaf b=E2=80=99s when condition is evaluated= to >> false, server will report =E2=80=98unknown-element=E2=80=99 error. >> >> Is it expected by user? >> Scene 2: >> >> The first edit-config request: >> >> >> >> >> >> >> >> >> >> >> >> 10 >> >> >> >> >> >> This request will set a =3D 10. >> >> >> >> The second request: >> >> >> >> >> >> >> >> >> >> >> >> 3 >> >> 5 >> >> >> >> >> >> According 8.3.1, in rpc payload parsing phase, the a=E2=80=99s value in >> candidate datastore is 10, so leaf b=E2=80=99s when condition is evaluat= ed to >> true, server will accept this request in payload parsing phase. >> >> >> >> In edit-config request processing phase, if leaf a=E2=80=99s modificatio= n is >> processed firstly, the a=E2=80=99s value will be changed to 3, so the b= =E2=80=99s when >> condition will be false, when server process b=E2=80=99s modification, b= will be >> treated as unknown-element, the edit-config request will fail. >> >> If leaf b=E2=80=99s modification is processed firstly, server will accep= t this >> modification ,because b=E2=80=99s when condition is true, and when serve= r >> process a=E2=80=99s modification , this modification will be accepted, a= nd b=E2=80=99s >> when condition will be evaluated to false, leaf b will be deleted >> automatically, the edit-config request will be OK. >> >> >> >> How server should process this situation? >> >> >> >> _______________________________________________ >> netmod mailing list >> netmod@ietf.org >> https://www.ietf.org/mailman/listinfo/netmod >> >> --000000000000800584059362c0b4 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable


=
On Wed, Sep 25, 2019 at 8:59 AM Andy = Bierman <andy@yumaworks.com>= ; wrote:


On Wed, Sep 25, 2019 at 8:44 AM Sterne, Jaso= n (Nokia - CA/Ottawa) <jason.sterne@nokia.com> wrote:

Processing order should not matter. The evaluation of the 'wh= en' statement should be done assuming an atomic application of the edit= -config.

=C2=A0

I agree that a standards compliant server should do as Rob said:<= u>

=C2=A0

- For =E2=80=9Cscene 1=E2=80=9D, the config change is accepted be= cause the result of the config datastore after the edit-config has been app= lied is valid.

- For =E2=80=9Cscene 2=E2=80=9D, the config change is rejected be= cause the result of the config datastore after the edit-config has been app= lied is invalid.

=C2=A0

From an implementation that may indeed mean processing the 'w= hen' after a first pass that sets the various leafs to tentative values= . But that's implementation detail.

=C2=A0

IMO the auto-clearing behavior of 'when' may be complicat= ed but that is how it is defined (same with 'choice'). Clients can = and should depend on things being automatically deleted. If you want validation errors (i.e. fo= rce the client to clear all the dependant leafs instead of auto-clearing) t= hen use a 'must' statement.

=C2=A0


<= div>+1

YANG clearly defines "must" and &= quot;when" with different behavior.
A server that does not i= mplement the auto-delete aspects of when-stmt is not compliant to the RFC.<= /div>
=C2=A0


=
oops -- s/must-stmt/when-stmt/

=C2=A0

Jason


Andy=
=C2=A0

=C2=A0

From: netmod <netmod-bounces@ietf.org> On Behalf Of Qin Wu
Sent: Tuesday, September 10, 2019 10:33 PM
To: Fengchong (frank) <frank.fengchong@huawei.com>; Andy Bierman <= andy@yumaworks.com<= /a>>
Cc: netmod@ietf= .org; Yangang <yangang@huawei.com>
Subject: [netmod] =E7=AD=94=E5=A4=8D: =E7= =AD=94=E5=A4=8D: Please clarify implementation about =E2=80=98when= =E2=80=99

=C2=A0

Why processing order matter= ? My interpretation is both leaf node values (i.e.,leaf a, leaf b) should b= e validated together and commit as a whole,

RFC6241 said:=

=E2=80=9C

= If the device is unable to commit all of the changes in the

=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0 candidate configuration datastore, then the running

=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0 configuration MUST remain unchanged.

=E2=80=9D

So validate the leaf node v= alue in the edit-config request (message content validation) is not importa= nt, validate the leaf node value that is applied to <running> (datastore validation) = is the key.

=C2=A0= 

I think what you want to raise is the server =
should hold on to send reply with an "unknown-element" <error-=
tag> in the <rpc-error> during payload parsing phase and NETCONF &=
lt;edit-config> 
Processing until all validation complete, oth=
erwise it seems server will 
Send multiple rply with "unknown-element=
" <error-tag> in the <rpc-error> which seems not reasonabl=
e.
=C2=A0
-Qin

=E5=8F=91=E4=BB=B6=E4=BA=BA= : netmod [mailt= o:netmod-bounces@ietf.org] =E4=BB=A3=E8=A1=A8 Fengchong (frank)
=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4= : 2019=E5=B9=B49=E6=9C=8811<= span lang=3D"ZH-CN" style=3D"font-size:11pt;font-family:"Microsoft YaH= ei",sans-serif">=E6=97=A5 9:29
=E6=94=B6=E4=BB=B6=E4=BA=BA: Andy Bierman <a= ndy@yumaworks.com>
=E6=8A=84=E9=80=81: netmod@ietf.org; Y= angang <yangang@= huawei.com>
=E4=B8=BB=E9=A2=98: [netmod] =E7=AD=94=E5=A4=8D: Please clarify implementation about =E2=80=98= when=E2=80=99

=C2=A0

= Andy,

=C2=A0=

Whether different result wo= uld occur according different process order?

According 8.3.2

if server process =E2=80=98= a=3D 3=E2=80=99 firstly, b will be deleted by system and becomes a non-exist schema node, and then =C2=A0when =E2=80=98b=3D5=E2= =80=99 is processed , server will report a =E2=80=98unknown-element=E2=80= =99 error.

But if server process =E2= =80=98b=3D5=E2=80=99 firstly, it will be accepted by server, and then when =E2=80=98a=3D3=E2=80=99 is processed, b will be dele= ted by system, but report OK.

=C2=A0=

If sec 8.3.2 is not right. = What is the right?

When node a and node b in t= he same request, and b tagged when condition, a=E2=80=99s value will cause b=E2=80=99s condition is evaluated= to false, which is more prior?

According you and Rob=E2=80= =99s interpretation , maybe node =E2=80=99a=E2=80=99 is more prior? If yes, why node =E2=80=98b=E2=80=99 should be processed later= ?

=C2=A0=

I think whether in edit-con= fig processing phase the configuration tagged when should not be evaluated and be delayed to commit or validate?<= u>

When commit or validate ope= ration is issued,=C2=A0 the data node tagged when will be evaluated, and if it=E2=80=99s evaluated to false, thi= s data will be deleted by system immediately, server should not report any = error.

=C2=A0=

=C2=A0=

= =E5=8D=8E=E4=B8=BA=E6=8A=80=E6=9C=AF=E6=9C=89=E9=99=90=E5=85=AC=E5=8F=B8 Huawei Technologie= s Co., Ltd.

= 3D"Company=

= =E4=B8=AA=E4=BA=BA=E7=AD=BE=E5=90=8D=EF=BC=9A=E5=86=AF=E5=86=B2
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=E6=AD=A2= =E4=BB=BB=E4=BD=95=E5=85=B6=E4=BB=96=E4=BA=BA=E4=BB=A5=E4=BB=BB=E4=BD=95=E5= =BD=A2=E5=BC=8F=E4=BD=BF=E7=94=A8=EF=BC=88=E5=8C=85=E6=8B=AC=E4=BD=86=E4=B8= =8D=E9=99=90=E4=BA=8E=E5=85=A8=E9=83=A8=E6=88=96=E9=83=A8=E5=88=86=E5=9C=B0= =E6=B3=84=E9=9C=B2=E3=80=81=E5=A4=8D=E5=88=B6=E3=80=81=E6=88=96=E6=95=A3=E5= =8F=91=EF=BC=89=E6=9C=AC=E9=82=AE=E4=BB=B6=E4=B8=AD
=E7=9A=84= =E4=BF=A1=E6=81=AF=E3=80=82=E5=A6=82=E6=9E=9C=E6=82=A8=E9=94=99=E6=94=B6=E4= =BA=86=E6=9C=AC=E9=82=AE=E4=BB=B6=EF=BC=8C=E8=AF=B7=E6=82=A8=E7=AB=8B=E5=8D= =B3=E7=94=B5=E8=AF=9D=E6=88=96=E9=82=AE=E4=BB=B6=E9=80=9A=E7=9F=A5=E5=8F=91= =E4=BB=B6=E4=BA=BA=E5=B9=B6=E5=88=A0=E9=99=A4=E6=9C=AC=E9=82=AE=E4=BB=B6=EF= =BC=81
This e-mail and its attachments contain confidential information from HUAWE= I, which
is intended only for the person or entity whose address is listed above. An= y use of the
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=E5=8F=91=E4=BB=B6=E4=BA=BA= : Andy Bierman [mail= to:andy@yumaworks.com]
=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4= : 2019=E5=B9=B49=E6=9C=8810<= span lang=3D"ZH-CN" style=3D"font-size:11pt;font-family:"Microsoft YaH= ei",sans-serif">=E6=97=A5 10:56
=E6=94=B6=E4=BB=B6=E4=BA=BA: Fengchong (frank) <frank.fengchong@huawei.com>
=E6=8A=84=E9=80=81: Rob Wilton (rwilton) <rwilton@cisco.com>; netmod@ietf.org; Y= angang <yangang@= huawei.com>
=E4=B8=BB=E9=A2=98: Re: [netmod] Please clarify implementation about =E2=80=98when= =E2=80=99

=C2=A0

=C2=A0=

=C2=A0

On Mon, Sep 9, 2019 at 7:40 PM = Fengchong (frank) <frank.fengchong@huawei.com> wrote:<= /p>

Andy,

Whether all constraints on = content in <config> parameter will not be evaluated in payload parsing phase, for example, a leaf=E2=80=99s v= alue exceed range?

Netconf server should treat= it as a block data?

=C2=A0

=C2=A0

Field validation and datastore = validation are 2 different things.

when-stmt processing is neither= . It is by far the hardest part of an automated server to get right.=

=C2=A0

Another question:

=C2=A0

In edit-config processing p= hase, whether constraints on content in <config> parameter needs be evaluated?

If yes, when =C2=A0configur= ation modification cause when condition is evaluated to false, the node tagged when will be automatically deleted = by system.

Then, in scene 2, whether d= ifferent result would occur according different process order?<= /p>

=C2=A0

=C2=A0

Since the <config> parame= ter is anyxml, the YANG constraints defined on datastore contents=

are not enforced as part of RPC= input validation.

=C2=A0

It would be nice if NETCONF def= ined behavior for providing <config> data that will get deleted

immediately by the server.=C2= =A0 We have a CLI parameter for this since some vendors want to

treat this as an error and othe= r just silently delete nodes.=C2=A0 Note that when-stmt can silently=

delete existing nodes not inclu= ded in the edit. (Lada does not agree this is how it should work,=

so we need yang-next to decide.= Maybe NETCONF needs a --force parameter for this purpose.)

=C2=A0

=C2=A0

Andy

=C2=A0

=C2=A0

=C2=A0

= =E5=8D=8E=E4=B8=BA=E6=8A=80=E6=9C=AF=E6=9C=89=E9=99=90=E5=85=AC=E5=8F=B8 Huawei Technologie= s Co., Ltd.

= 3D"Company_logo"

= =E4=B8=AA=E4=BA=BA=E7=AD=BE=E5=90=8D=EF=BC=9A=E5=86=AF=E5=86=B2
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=E7=94=B5=E5=AD= =90=E9=82=AE=E4=BB=B6=EF=BC=9Afrank.fengchong@huawei.com
=E5=85=AC=E5=8F= =B8=E7=BD=91=E5=9D=80=EF=BC=9Awww.huawe= i.com

=EF=BB=BF =E6=9C=AC= =E9=82=AE=E4=BB=B6=E5=8F=8A=E5=85=B6=E9=99=84=E4=BB=B6=E5=90=AB=E6=9C=89=E5= =8D=8E=E4=B8=BA=E5=85=AC=E5=8F=B8=E7=9A=84=E4=BF=9D=E5=AF=86=E4=BF=A1=E6=81= =AF=EF=BC=8C=E4=BB=85=E9=99=90=E4=BA=8E=E5=8F=91=E9=80=81=E7=BB=99=E4=B8=8A= =E9=9D=A2=E5=9C=B0=E5=9D=80=E4=B8=AD=E5=88=97=E5=87=BA=E7=9A=84=E4=B8=AA=E4= =BA=BA=E6=88=96=E7=BE=A4=E7=BB=84=E3=80=82=E7=A6=81
=E6=AD=A2= =E4=BB=BB=E4=BD=95=E5=85=B6=E4=BB=96=E4=BA=BA=E4=BB=A5=E4=BB=BB=E4=BD=95=E5= =BD=A2=E5=BC=8F=E4=BD=BF=E7=94=A8=EF=BC=88=E5=8C=85=E6=8B=AC=E4=BD=86=E4=B8= =8D=E9=99=90=E4=BA=8E=E5=85=A8=E9=83=A8=E6=88=96=E9=83=A8=E5=88=86=E5=9C=B0= =E6=B3=84=E9=9C=B2=E3=80=81=E5=A4=8D=E5=88=B6=E3=80=81=E6=88=96=E6=95=A3=E5= =8F=91=EF=BC=89=E6=9C=AC=E9=82=AE=E4=BB=B6=E4=B8=AD
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This e-mail and its attachments contain confidential information from HUAWE= I, which
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information contained herein in any way (including, but not limited to, tot= al or partial
disclosure, reproduction, or dissemination) by persons other than the inten= ded
recipient(s) is prohibited. If you receive this e-mail in error, please not= ify the sender by
phone or email immediately and delete it!

=C2=A0

=E5=8F=91=E4=BB=B6=E4=BA=BA= : Andy Bierman [mailto:andy@yumaworks.com]
=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4= : 2019=E5=B9=B49=E6=9C=8810<= span lang=3D"ZH-CN" style=3D"font-size:11pt;font-family:"Microsoft YaH= ei",sans-serif">=E6=97=A5 10:19
=E6=94=B6=E4=BB=B6=E4=BA=BA: Fengchong (frank) <frank.fengchong@huawei.com>
=E6=8A=84=E9=80=81: Rob Wilton (rwilton) <rwilton@cisco.com>; netmod@ietf.org; Y= angang <yangang@= huawei.com>
=E4=B8=BB=E9=A2=98: Re: [netmod] Please clarify implementation about =E2=80=98when= =E2=80=99

=C2=A0

=C2=A0

=C2=A0

On Mon, Sep 9, 2019 at 7:10 PM = Fengchong (frank) <frank.fengchong@huawei.com> wrote:

Hi andy,

=C2=A0

You only talk about the con= straints on rpc operation=E2=80=99s parameter?<= u>

=C2=A0

Do you have any opinion abo= ut my question?

=C2=A0

8.3.1 does not apply to leaf &#= 39;b'.

The RPC parameter is called = 9;config'.

It has no when-stmts to evaluat= e.

Rob is correct.

His example shows what 8.3.1 wo= uld cover.

=C2=A0

Andy

=C2=A0

=C2=A0

=C2=A0

= =E5=8D=8E=E4=B8=BA=E6=8A=80=E6=9C=AF=E6=9C=89=E9=99=90=E5=85=AC=E5=8F=B8 Huawei Technologie= s Co., Ltd.

= 3D"Comp=

= =E4=B8=AA=E4=BA=BA=E7=AD=BE=E5=90=8D=EF=BC=9A=E5=86=AF=E5=86=B2
=E6=89=8B=E3=80= =80=E3=80=80=E6=9C=BA=EF=BC=9A13776612983
=E7=94=B5=E5=AD= =90=E9=82=AE=E4=BB=B6=EF=BC=9Afrank.fengchong@huawei.com
=E5=85=AC=E5=8F= =B8=E7=BD=91=E5=9D=80=EF=BC=9Awww.huawe= i.com

=EF=BB=BF =E6=9C=AC= =E9=82=AE=E4=BB=B6=E5=8F=8A=E5=85=B6=E9=99=84=E4=BB=B6=E5=90=AB=E6=9C=89=E5= =8D=8E=E4=B8=BA=E5=85=AC=E5=8F=B8=E7=9A=84=E4=BF=9D=E5=AF=86=E4=BF=A1=E6=81= =AF=EF=BC=8C=E4=BB=85=E9=99=90=E4=BA=8E=E5=8F=91=E9=80=81=E7=BB=99=E4=B8=8A= =E9=9D=A2=E5=9C=B0=E5=9D=80=E4=B8=AD=E5=88=97=E5=87=BA=E7=9A=84=E4=B8=AA=E4= =BA=BA=E6=88=96=E7=BE=A4=E7=BB=84=E3=80=82=E7=A6=81
=E6=AD=A2= =E4=BB=BB=E4=BD=95=E5=85=B6=E4=BB=96=E4=BA=BA=E4=BB=A5=E4=BB=BB=E4=BD=95=E5= =BD=A2=E5=BC=8F=E4=BD=BF=E7=94=A8=EF=BC=88=E5=8C=85=E6=8B=AC=E4=BD=86=E4=B8= =8D=E9=99=90=E4=BA=8E=E5=85=A8=E9=83=A8=E6=88=96=E9=83=A8=E5=88=86=E5=9C=B0= =E6=B3=84=E9=9C=B2=E3=80=81=E5=A4=8D=E5=88=B6=E3=80=81=E6=88=96=E6=95=A3=E5= =8F=91=EF=BC=89=E6=9C=AC=E9=82=AE=E4=BB=B6=E4=B8=AD
=E7=9A=84= =E4=BF=A1=E6=81=AF=E3=80=82=E5=A6=82=E6=9E=9C=E6=82=A8=E9=94=99=E6=94=B6=E4= =BA=86=E6=9C=AC=E9=82=AE=E4=BB=B6=EF=BC=8C=E8=AF=B7=E6=82=A8=E7=AB=8B=E5=8D= =B3=E7=94=B5=E8=AF=9D=E6=88=96=E9=82=AE=E4=BB=B6=E9=80=9A=E7=9F=A5=E5=8F=91= =E4=BB=B6=E4=BA=BA=E5=B9=B6=E5=88=A0=E9=99=A4=E6=9C=AC=E9=82=AE=E4=BB=B6=EF= =BC=81
This e-mail and its attachments contain confidential information from HUAWE= I, which
is intended only for the person or entity whose address is listed above. An= y use of the
information contained herein in any way (including, but not limited to, tot= al or partial
disclosure, reproduction, or dissemination) by persons other than the inten= ded
recipient(s) is prohibited. If you receive this e-mail in error, please not= ify the sender by
phone or email immediately and delete it!

=C2=A0

=E5=8F=91=E4=BB=B6=E4=BA=BA= : Andy Bierman [mailto:andy@yumaworks.com]
=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4= : 2019=E5=B9=B49=E6=9C=8810<= span lang=3D"ZH-CN" style=3D"font-size:11pt;font-family:"Microsoft YaH= ei",sans-serif">=E6=97=A5 1:14
=E6=94=B6=E4=BB=B6=E4=BA=BA: Rob Wilton (rwilton) <rwilton@cisco.com>
=E6=8A=84=E9=80=81: Fengchong (frank) <frank.fengchong@huawei.com>; netmod@ietf.org; Y= angang <yangang@= huawei.com>
=E4=B8=BB=E9=A2=98: Re: [netmod] Please clarify implementation about =E2=80=98when= =E2=80=99

=C2=A0

Hi,

=C2=A0

None of the operations that acc= ept or return datastore contents expose the datastore objects=

in the RPC parameters.=C2=A0 Th= ey are always anyxml or anydata. This means that

there are no descendant data no= des defined at all according to the RPC operation

and therefore the constraints o= n those nodes do not exist in the RPC operation either.

=C2=A0

=C2=A0

=C2=A0

On Mon, Sep 9, 2019 at 6:41 AM = Rob Wilton (rwilton) <rwilton@cisco.com> wrote:

Hi Fra= nk,

=C2=A0=

My int= erpretation of what the expected behaviour is as follows.

=C2=A0=

For =E2=80=9Cscene 1=E2=80=9D, the config change is accepted because the result of the config datastore a= fter the edit-config has been applied is valid.=

=C2=A0=

For =E2=80=9Cscene 2=E2=80=9D, the config change is rejected because the result of the config datastore a= fter the edit-config has been applied is invalid.

=C2=A0=

My int= erpretation is that the block of text in 8.3.1 payload parsing is primary i= ntended to refer to RFC input.=C2=A0 E.g. if the RPC was defined something like below, then the =E2=80=98when=E2=80=99 rule in 8.3.1 would enforce that a zip-code can only be provided if the co= untry is the USA.

=C2=A0=

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0 rpc rock-the-house {

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0 input {

=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0leaf country {=

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 type string;

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0 }

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0 leaf zip-code {<= /u>

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 when =E2=80=9C../country =3D =E2=80= =98usa=E2=80=99=E2=80=9D;<= /p>

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 type string;

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0 }

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0 }

=C2=A0 =C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0}

=C2=A0=

Thanks= ,

Rob

=C2=A0=

=C2=A0=

=C2=A0=

Fro= m: netmod <netmod-bounces@iet= f.org> On Behalf Of Fengchong (frank)
Sent: 06 September 2019 08:19
To: netmod@ietf= .org
Cc: Yangang <yangang@huawei.com>
Subject: [netmod] Please clarify implementation about =E2=80=98when=E2=80=99

=C2=A0

Hi all,

=C2=A0

In RFC7950 secton 8, several de= scription about when=EF=BC=9A

In section 8.2.=C2=A0 Configuration Data Modi= fications

=C2=A0=C2=A0 o=C2=A0 If a request modifies a configuration data node = such that any

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 node's "when" expression= becomes false, then the node in the data

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 tree with the "when" express= ion is deleted by the server.

In 8.3.1.=C2=A0= Payload Parsing

=C2=A0=C2=A0=
 o=C2=A0 If data for a node tagged with "when" is present and the=
 "when"
=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0 condition evaluates to "false", the server MUS=
T reply with an
=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0 "unknown-element" <error-tag> in the <=
;rpc-error>.

In 8.3.2= .=C2=A0 NETCONF <edit-config> Processing<= u>

Modification=
 requests for nodes tagged with "when", and the "when"<=
/span>
=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0 condition evaluates to "false".=C2=A0 In this =
case, the server MUST

=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0 reply with an "unknown-element" <error-tag&=
gt; in the <rpc-error>.


=C2=A0


YANG module=EF=BC=9A


module foo {


=C2=A0=C2=A0 namespace
=E2=80=9Chttp://foo.com=E2=80=9D;


=C2=A0=C2=A0 prefix
=E2=80=9Cfoo=
=E2=80=9D;



Leaf a {=E2=80=A6}



Leaf b {



=C2=A0 When =E2=80=9Ca =3D 10=E2=80=9D=
;



}


}


Scene 1: 


The first edit-config request:<=
u>


<edit-config>


=C2=A0=C2=A0 <target><=
/u>


=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
<candidate/>


=C2=A0=C2=A0 </target>



=C2=A0=C2=A0=C2=A0<config>=
;


=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
<a xmlns=3D
=E2=80=9Chttp://foo.com=E2=80=9D>3</a>


=C2=A0=C2=A0 </config>=



</edit-config><=
/u>


This request will set a =3D 3.<=
u>


=C2=A0


The second request:


<edit-config>


=C2=A0=C2=A0 <target><=
/u>


=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
<candidate/>


=C2=A0=C2=A0 </target>



=C2=A0=C2=A0=C2=A0<config>=
;


=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
<a xmlns=3D
=E2=80=9Chttp://foo.com=E2=80=9D>10</a>


=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
<b xmlns=3D
=E2=80=9Chttp://foo.com=E2=80=9D>5</b>


=C2=A0=C2=A0 </config>=



</edit-config><=
/u>


=C2=A0


Accord=
ing 8.3.1, in rpc payload parsing phase, the a=E2=80=99s
 value in candidate datastore is 3,so leaf b=E2=80=99s when condition is evaluated to false, server will report
=E2=80=98unknown-element=E2=80=99
 error.


Is it =
expected by user?


Scene 2:


The first edit-config request:<=
u>


<edit-config>


=C2=A0=C2=A0 <target><=
/u>


=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
<candidate/>


=C2=A0=C2=A0 </target>



=C2=A0=C2=A0=C2=A0<config>=
;


=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
<a xmlns=3D
=E2=80=9Chttp://foo.com=E2=80=9D>10</a>


=C2=A0=C2=A0 </config>=



</edit-config><=
/u>


This request will set a =3D 10.=



=C2=A0


The second request:


<edit-config>


=C2=A0=C2=A0 <target><=
/u>


=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
<candidate/>


=C2=A0=C2=A0 </target>



=C2=A0=C2=A0=C2=A0<config>=
;


=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
<a xmlns=3D
=E2=80=9Chttp://foo.com=E2=80=9D>3</a>


=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
<b xmlns=3D
=E2=80=9Chttp://foo.com=E2=80=9D>5</b>


=C2=A0=C2=A0 </config>=



</edit-config><=
/u>


Accord=
ing 8.3.1, in rpc payload parsing phase, the a=E2=80=99s
 value in candidate datastore is 10, so leaf b=E2=80=99s when condition is evaluated to true, server will accept
 this request in payload parsing phase. =



=C2=A0=



In edi=
t-config request processing phase, if leaf a=E2=80=99s
 modification is processed firstly, the a=E2=80=99s value will be changed to 3, so the b=E2=80=99s
 when condition will be false, when server process b=E2=80=99s modification, b will be treated as unknown-element,
 the edit-config request will fail. <=
/u>


If lea=
f b=E2=80=99s
 modification is processed firstly, server will accept this modification ,b=
ecause b=E2=80=99s when condition
 is true, and when server process a=E2=80=99=
s modification , this modification will be accepted, and b=E2=80=99s
 when condition will be evaluated to false, leaf b will be deleted automati=
cally, the edit-config request will be OK.


=C2=A0=



How se=
rver should process this situation?


=C2=A0

_______________________________= ________________
netmod mailing list
netmod@ietf.org = https://www.ietf.org/mailman/listinfo/netmod

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MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit From: internet-drafts@ietf.org To: Cc: netmod@ietf.org X-Test-IDTracker: no X-IETF-IDTracker: 6.102.0 Auto-Submitted: auto-generated Precedence: bulk Reply-To: netmod@ietf.org Message-ID: <156942813583.28879.894232837346561087@ietfa.amsl.com> Date: Wed, 25 Sep 2019 09:15:35 -0700 Archived-At: Subject: [netmod] I-D Action: draft-ietf-netmod-module-tags-09.txt X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 25 Sep 2019 16:15:36 -0000 A New Internet-Draft is available from the on-line Internet-Drafts directories. This draft is a work item of the Network Modeling WG of the IETF. Title : YANG Module Tags Authors : Christian Hopps Lou Berger Dean Bogdanovic Filename : draft-ietf-netmod-module-tags-09.txt Pages : 18 Date : 2019-09-25 Abstract: This document provides for the association of tags with YANG modules. The expectation is for such tags to be used to help classify and organize modules. A method for defining, reading and writing a modules tags is provided. Tags may be registered and assigned during module definition; assigned by implementations; or dynamically defined and set by users. This document also provides guidance to future model writers; as such, this document updates RFC8407. The IETF datatracker status page for this draft is: https://datatracker.ietf.org/doc/draft-ietf-netmod-module-tags/ There are also htmlized versions available at: https://tools.ietf.org/html/draft-ietf-netmod-module-tags-09 https://datatracker.ietf.org/doc/html/draft-ietf-netmod-module-tags-09 A diff from the previous version is available at: https://www.ietf.org/rfcdiff?url2=draft-ietf-netmod-module-tags-09 Please note that it may take a couple of minutes from the time of submission until the htmlized version and diff are available at tools.ietf.org. Internet-Drafts are also available by anonymous FTP at: ftp://ftp.ietf.org/internet-drafts/ From nobody Wed Sep 25 09:19:17 2019 Return-Path: X-Original-To: netmod@ietfa.amsl.com Delivered-To: netmod@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 27D671201B7 for ; Wed, 25 Sep 2019 09:19:04 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.898 X-Spam-Level: X-Spam-Status: No, score=-1.898 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_NONE=0.001] autolearn=ham autolearn_force=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id LDCLKEKZXADZ for ; Wed, 25 Sep 2019 09:19:02 -0700 (PDT) Received: from smtp.chopps.org (smtp.chopps.org [54.88.81.56]) by ietfa.amsl.com (Postfix) with ESMTP id 41C8A1200E5 for ; Wed, 25 Sep 2019 09:19:02 -0700 (PDT) Received: from stubbs.int.chopps.org (unknown [172.222.100.236]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by smtp.chopps.org (Postfix) with ESMTPSA id B207960199; Wed, 25 Sep 2019 12:19:01 -0400 (EDT) From: Christian Hopps Message-Id: <8F9EDBC3-EB9C-452E-9091-03DBBC735CAB@chopps.org> Content-Type: multipart/signed; boundary="Apple-Mail=_0A2181EC-5DE5-4932-9B4C-AEEA15F595D5"; protocol="application/pgp-signature"; micalg=pgp-sha512 Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.11\)) Date: Wed, 25 Sep 2019 12:19:00 -0400 In-Reply-To: <156942813583.28879.894232837346561087@ietfa.amsl.com> To: netmod@ietf.org References: <156942813583.28879.894232837346561087@ietfa.amsl.com> X-Mailer: Apple Mail (2.3445.104.11) Archived-At: Subject: Re: [netmod] I-D Action: draft-ietf-netmod-module-tags-09.txt X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 25 Sep 2019 16:19:16 -0000 --Apple-Mail=_0A2181EC-5DE5-4932-9B4C-AEEA15F595D5 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii This adds the deprecated non-NMDA state module. Thanks, Chris. > On Sep 25, 2019, at 12:15 PM, internet-drafts@ietf.org wrote: >=20 >=20 > A New Internet-Draft is available from the on-line Internet-Drafts = directories. > This draft is a work item of the Network Modeling WG of the IETF. >=20 > Title : YANG Module Tags > Authors : Christian Hopps > Lou Berger > Dean Bogdanovic > Filename : draft-ietf-netmod-module-tags-09.txt > Pages : 18 > Date : 2019-09-25 >=20 > Abstract: > This document provides for the association of tags with YANG = modules. > The expectation is for such tags to be used to help classify and > organize modules. A method for defining, reading and writing a > modules tags is provided. Tags may be registered and assigned = during > module definition; assigned by implementations; or dynamically > defined and set by users. This document also provides guidance to > future model writers; as such, this document updates RFC8407. >=20 >=20 > The IETF datatracker status page for this draft is: > https://datatracker.ietf.org/doc/draft-ietf-netmod-module-tags/ >=20 > There are also htmlized versions available at: > https://tools.ietf.org/html/draft-ietf-netmod-module-tags-09 > https://datatracker.ietf.org/doc/html/draft-ietf-netmod-module-tags-09 >=20 > A diff from the previous version is available at: > https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-netmod-module-tags-09 >=20 >=20 > Please note that it may take a couple of minutes from the time of = submission > until the htmlized version and diff are available at tools.ietf.org. >=20 > Internet-Drafts are also available by anonymous FTP at: > ftp://ftp.ietf.org/internet-drafts/ >=20 > _______________________________________________ > netmod mailing list > netmod@ietf.org > https://www.ietf.org/mailman/listinfo/netmod >=20 --Apple-Mail=_0A2181EC-5DE5-4932-9B4C-AEEA15F595D5 Content-Transfer-Encoding: 7bit Content-Disposition: attachment; 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Wed, 25 Sep 2019 09:20:40 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Andy Bierman Date: Wed, 25 Sep 2019 09:20:29 -0700 Message-ID: To: "Sterne, Jason (Nokia - CA/Ottawa)" Cc: "netmod@ietf.org" Content-Type: multipart/alternative; boundary="000000000000b9c2e805936308b4" Archived-At: Subject: Re: [netmod] evaluating 'when' statements with unconfigured leafs X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 25 Sep 2019 16:20:55 -0000 --000000000000b9c2e805936308b4 Content-Type: text/plain; charset="UTF-8" On Wed, Sep 25, 2019 at 8:37 AM Sterne, Jason (Nokia - CA/Ottawa) < jason.sterne@nokia.com> wrote: > Hi all, > > > > I saw some recent questions about 'when' statements. I had another one > related to evaluating 'when' statements that involve leafs that don't > currently have a value at all. > > > > leaf foo { > > type enumeration { > > enum val1; > > enum val2; > > } > > } > > > > leaf bar { > > when "../foo != 'val2'"; > > type uint8; > > } > > > > Notice that foo does not have a default statement. So if no manager has > set leaf foo, it doesn't exist in the config. > > > > In that case, does the "when" statement evaluate to 'true' (i.e. leaf bar > is allowed to have a value) ? > > > no > i.e. assuming leaf foo is not set at all, is this accepted? > > 23 > > > > Or is there something special here because of the non-existence of leaf > foo? > > > correct. An empty node-set does not always convert to am empty string. So easy to tell XPath to do the wrong thing... when "../foo != 'val2'"; is not equivalent to when "string(../foo) != 'val2'"; If one object to be compared is a node-set and the other is a string, then the comparison will be true if and only if there is a node in the node-set such that the result of performing the comparison on the string-value of the node and the other string is true. Andy If the "when" evaluates to 'false', then does the following "when" evaluate > differently than the one above? > > when "not(../foo = 'val2')"; > > > > Jason > _______________________________________________ > netmod mailing list > netmod@ietf.org > https://www.ietf.org/mailman/listinfo/netmod > --000000000000b9c2e805936308b4 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable


=
On Wed, Sep 25, 2019 at 8:37 AM Stern= e, Jason (Nokia - CA/Ottawa) <= jason.sterne@nokia.com> wrote:

Hi all,

=C2=A0

I saw some recent questions about 'when' sta= tements. I had another one related to evaluating 'when' statements = that involve leafs that don't currently have a value at all.<= /u>

=C2=A0

leaf foo {

=C2=A0=C2=A0=C2=A0 type enumeration {<= /p>

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 enum val1= ;

=C2=A0=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0=C2=A0enum val2= ;

=C2=A0=C2=A0=C2=A0 }

}

=C2=A0

leaf bar {

=C2=A0=C2=A0=C2=A0 when "../foo !=3D 'val2&= #39;";

=C2=A0=C2=A0=C2=A0 type uint8;

}

=C2=A0

Notice that foo does not have a default statement. S= o if no manager has set leaf foo, it doesn't exist in the config.

=C2=A0

In that case, does the "when" statement ev= aluate to 'true' =C2=A0(i.e. leaf bar is allowed to have a value) ?=

=C2=A0


<= /div>
no
=C2=A0

i.e. assuming leaf foo is not set at all, is this ac= cepted?

<bar>23</bar>

=C2=A0

Or is there something special here because of the no= n-existence of leaf foo?

=C2=A0


<= /div>
=C2=A0correct.
An empty node-set does not always conver= t to am empty string.
So easy to tell XPath to do the wrong thing= ...

=C2=A0=C2=A0=C2=A0 when "../foo !=3D '= ;val2'";

is not equivalent to
<= br>
=C2=A0 when "string(../foo) !=3D 'val2'";


If one object to be compared is a = node-set and the other is a string, then the comparison will be true if and= only if there is a node in the node-set such that the result of performing= the comparison on the=C2=A0string-value=C2=A0of the node and the o= ther string is true.


Andy

If the "when" evaluates to 'false'= , then does the following "when" evaluate differently than the on= e above?

=C2=A0=C2=A0=C2=A0 when "not(../foo =3D 'va= l2')";

=C2=A0

Jason

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([169.254.4.185]) by dggeml423-hub.china.huawei.com ([10.1.199.40]) with mapi id 14.03.0439.000; Thu, 26 Sep 2019 10:54:45 +0800 From: Qin Wu To: Andy Bierman , "Sterne, Jason (Nokia - CA/Ottawa)" CC: "Fengchong (frank)" , "netmod@ietf.org" , Yangang Thread-Topic: =?utf-8?B?W25ldG1vZF0g562U5aSNOiDnrZTlpI06IFBsZWFzZSBjbGFyaWZ5IGltcGxl?= =?utf-8?B?bWVudGF0aW9uIGFib3V0IOKAmHdoZW7igJk=?= Thread-Index: AQHVc7pFWtlcccOC1kWw5QAXokjBRac8BxWAgAEyibA= Date: Thu, 26 Sep 2019 02:54:45 +0000 Message-ID: References: <5756FB984666AD4BB8E1D63E2E3AA3D001F20F2C@dggemm513-mbs.china.huawei.com> <5756FB984666AD4BB8E1D63E2E3AA3D001F2CBA8@dggemm513-mbx.china.huawei.com> <5756FB984666AD4BB8E1D63E2E3AA3D001F2CBE4@dggemm513-mbx.china.huawei.com> <5756FB984666AD4BB8E1D63E2E3AA3D001F2D325@dggemm513-mbx.china.huawei.com> In-Reply-To: Accept-Language: zh-CN, en-US Content-Language: zh-CN X-MS-Has-Attach: yes X-MS-TNEF-Correlator: x-originating-ip: [10.134.31.203] Content-Type: multipart/related; 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header.d=yumaworks-com.20150623.gappssmtp.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id qJczKq21uAdv for ; Wed, 25 Sep 2019 20:57:38 -0700 (PDT) Received: from mail-lj1-x22e.google.com (mail-lj1-x22e.google.com [IPv6:2a00:1450:4864:20::22e]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 2421C1200DF for ; Wed, 25 Sep 2019 20:57:37 -0700 (PDT) Received: by mail-lj1-x22e.google.com with SMTP id l21so609583lje.4 for ; Wed, 25 Sep 2019 20:57:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yumaworks-com.20150623.gappssmtp.com; s=20150623; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=RZ93amr+3qBn/UyWldbkFPQ6hr6QSzAMoAqKcxqCyxo=; b=Z6URi5M3vWv1iUYSY0iZnb7EcWQTR4vHq4KgLCtZzM+SqcejPHsecoDRKaXwyYcwc+ 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X-Google-Smtp-Source: APXvYqyYNof1DOQgdwAxFAa29RG5/3UwsaY4D/IuDB1UHlX4kP5+rm3uvB9GQYiWMWV6acACnRQa0/0bfq04axM1bco= X-Received: by 2002:a2e:b00b:: with SMTP id y11mr979203ljk.50.1569470255009; Wed, 25 Sep 2019 20:57:35 -0700 (PDT) MIME-Version: 1.0 References: <5756FB984666AD4BB8E1D63E2E3AA3D001F20F2C@dggemm513-mbs.china.huawei.com> <5756FB984666AD4BB8E1D63E2E3AA3D001F2CBA8@dggemm513-mbx.china.huawei.com> <5756FB984666AD4BB8E1D63E2E3AA3D001F2CBE4@dggemm513-mbx.china.huawei.com> <5756FB984666AD4BB8E1D63E2E3AA3D001F2D325@dggemm513-mbx.china.huawei.com> In-Reply-To: From: Andy Bierman Date: Wed, 25 Sep 2019 20:57:23 -0700 Message-ID: To: Qin Wu Cc: "Sterne, Jason (Nokia - CA/Ottawa)" , "Fengchong (frank)" , "netmod@ietf.org" , Yangang Content-Type: multipart/related; boundary="000000000000099a0a05936cc565" Archived-At: Subject: Re: [netmod] =?utf-8?b?562U5aSNOiDnrZTlpI06IFBsZWFzZSBjbGFyaWZ5IGlt?= =?utf-8?b?cGxlbWVudGF0aW9uIGFib3V0IOKAmHdoZW7igJk=?= X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 26 Sep 2019 03:57:42 -0000 --000000000000099a0a05936cc565 Content-Type: multipart/alternative; boundary="000000000000099a0905936cc564" --000000000000099a0905936cc564 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Wed, Sep 25, 2019 at 7:54 PM Qin Wu wrote: > *=E5=8F=91=E4=BB=B6=E4=BA=BA:* Andy Bierman [mailto:andy@yumaworks.com] > *=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4:* 2019=E5=B9=B49=E6=9C=8826=E6=97= =A5 0:00 > *=E6=94=B6=E4=BB=B6=E4=BA=BA:* Sterne, Jason (Nokia - CA/Ottawa) > *=E6=8A=84=E9=80=81:* Qin Wu ; Fengchong (frank) < > frank.fengchong@huawei.com>; netmod@ietf.org; Yangang > *=E4=B8=BB=E9=A2=98:* Re: [netmod] =E7=AD=94=E5=A4=8D: =E7=AD=94=E5=A4=8D= : Please clarify implementation about =E2=80=98when=E2=80=99 > > > > > > > > On Wed, Sep 25, 2019 at 8:59 AM Andy Bierman wrote: > > > > > > On Wed, Sep 25, 2019 at 8:44 AM Sterne, Jason (Nokia - CA/Ottawa) < > jason.sterne@nokia.com> wrote: > > Processing order should not matter. The evaluation of the 'when' statemen= t > should be done assuming an atomic application of the edit-config. > > > > I agree that a standards compliant server should do as Rob said: > > > > - For =E2=80=9Cscene 1=E2=80=9D, the config change is accepted because th= e result of the > config datastore after the edit-config has been applied is valid. > > - For =E2=80=9Cscene 2=E2=80=9D, the config change is rejected because th= e result of the > config datastore after the edit-config has been applied is invalid. > > > > From an implementation that may indeed mean processing the 'when' after a > first pass that sets the various leafs to tentative values. But that's > implementation detail. > > > > IMO the auto-clearing behavior of 'when' may be complicated but that is > how it is defined (same with 'choice'). Clients can and should depend on > things being automatically deleted. If you want validation errors (i.e. > force the client to clear all the dependant leafs instead of auto-clearin= g) > then use a 'must' statement. > > > > [Qin]: Good clarification. > > > > +1 > > > > YANG clearly defines "must" and "when" with different behavior. > > A server that does not implement the auto-delete aspects of when-stmt is > not compliant to the RFC. > > > > > > > > oops -- s/must-stmt/when-stmt/ > > > > [Qin]: implement the auto-delete aspects of must-stmt is a must for serve= r > or implement client force delete aspects of must stmt is a must for a > server? > > So for both =E2=80=9Cscene 1=E2=80=9D and =E2=80=9Cscene 2=E2=80=9D, the= client will not receive > validation error unless when statement is replaced with must statement in > the below example model? > > I thought validation error will still be received when the config change > is reject in =E2=80=9Cscene 2=E2=80=9D. > sorry for the confusion. it was right the first time. when-stmt has auto-delete. must-stmt has error instead of auto-delete. Andy Jason > > > > Andy > > > > > > *From:* netmod *On Behalf Of *Qin Wu > *Sent:* Tuesday, September 10, 2019 10:33 PM > *To:* Fengchong (frank) ; Andy Bierman < > andy@yumaworks.com> > *Cc:* netmod@ietf.org; Yangang > *Subject:* [netmod] =E7=AD=94=E5=A4=8D: =E7=AD=94=E5=A4=8D: Please clarif= y implementation about =E2=80=98when=E2=80=99 > > > > Why processing order matter? My interpretation is both leaf node values > (i.e.,leaf a, leaf b) should be validated together and commit as a whole, > > RFC6241 said: > > =E2=80=9C > > If the device is unable to commit all of the changes in the > > candidate configuration datastore, then the running > > configuration MUST remain unchanged. > > =E2=80=9D > > So validate the leaf node value in the edit-config request (message > content validation) is not important, validate the leaf node value that i= s > applied to (datastore validation) is the key. > > > > I think what you want to raise is the server should hold on to send reply= with an "unknown-element" in the during payload pa= rsing phase and NETCONF > > Processing until all validation complete, otherwise it seems server will > > Send multiple rply with "unknown-element" in the = which seems not reasonable. > > > > -Qin > > *=E5=8F=91=E4=BB=B6=E4=BA=BA**:* netmod [mailto:netmod-bounces@ietf.org <= netmod-bounces@ietf.org>] > *=E4=BB=A3=E8=A1=A8 *Fengchong (frank) > *=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4**:* 2019=E5=B9=B49=E6=9C=8811=E6=97= =A5 9:29 > *=E6=94=B6=E4=BB=B6=E4=BA=BA**:* Andy Bierman > *=E6=8A=84=E9=80=81**:* netmod@ietf.org; Yangang > *=E4=B8=BB=E9=A2=98**:* [netmod] =E7=AD=94=E5=A4=8D: Please clarify imple= mentation about =E2=80=98when=E2=80=99 > > > > Andy, > > > > Whether different result would occur according different process order? > > According 8.3.2 > > if server process =E2=80=98a=3D 3=E2=80=99 firstly, b will be deleted by = system and becomes > a non-exist schema node, and then when =E2=80=98b=3D5=E2=80=99 is proces= sed , server will > report a =E2=80=98unknown-element=E2=80=99 error. > > But if server process =E2=80=98b=3D5=E2=80=99 firstly, it will be accepte= d by server, and > then when =E2=80=98a=3D3=E2=80=99 is processed, b will be deleted by syst= em, but report OK. > > > > If sec 8.3.2 is not right. What is the right? > > When node a and node b in the same request, and b tagged when condition, > a=E2=80=99s value will cause b=E2=80=99s condition is evaluated to false,= which is more > prior? > > According you and Rob=E2=80=99s interpretation , maybe node =E2=80=99a=E2= =80=99 is more prior? If > yes, why node =E2=80=98b=E2=80=99 should be processed later? > > > > I think whether in edit-config processing phase the configuration tagged > when should not be evaluated and be delayed to commit or validate? > > When commit or validate operation is issued, the data node tagged when > will be evaluated, and if it=E2=80=99s evaluated to false, this data will= be > deleted by system immediately, server should not report any error. > > > > > ------------------------------ > > =E5=8D=8E=E4=B8=BA=E6=8A=80=E6=9C=AF=E6=9C=89=E9=99=90=E5=85=AC=E5=8F=B8 = Huawei Technologies Co., Ltd. > > [image: Company_logo] > > =E4=B8=AA=E4=BA=BA=E7=AD=BE=E5=90=8D=EF=BC=9A=E5=86=AF=E5=86=B2 > =E6=89=8B =E6=9C=BA=EF=BC=9A13776612983 > =E7=94=B5=E5=AD=90=E9=82=AE=E4=BB=B6=EF=BC=9Afrank.fengchong@huawei.com > =E5=85=AC=E5=8F=B8=E7=BD=91=E5=9D=80=EF=BC=9Awww.huawei.com > ------------------------------ > > =EF=BB=BF =E6=9C=AC=E9=82=AE=E4=BB=B6=E5=8F=8A=E5=85=B6=E9=99=84=E4=BB=B6= =E5=90=AB=E6=9C=89=E5=8D=8E=E4=B8=BA=E5=85=AC=E5=8F=B8=E7=9A=84=E4=BF=9D=E5= =AF=86=E4=BF=A1=E6=81=AF=EF=BC=8C=E4=BB=85=E9=99=90=E4=BA=8E=E5=8F=91=E9=80= =81=E7=BB=99=E4=B8=8A=E9=9D=A2=E5=9C=B0=E5=9D=80=E4=B8=AD=E5=88=97=E5=87=BA= =E7=9A=84=E4=B8=AA=E4=BA=BA=E6=88=96=E7=BE=A4=E7=BB=84=E3=80=82=E7=A6=81 > =E6=AD=A2=E4=BB=BB=E4=BD=95=E5=85=B6=E4=BB=96=E4=BA=BA=E4=BB=A5=E4=BB=BB= =E4=BD=95=E5=BD=A2=E5=BC=8F=E4=BD=BF=E7=94=A8=EF=BC=88=E5=8C=85=E6=8B=AC=E4= =BD=86=E4=B8=8D=E9=99=90=E4=BA=8E=E5=85=A8=E9=83=A8=E6=88=96=E9=83=A8=E5=88= =86=E5=9C=B0=E6=B3=84=E9=9C=B2=E3=80=81=E5=A4=8D=E5=88=B6=E3=80=81=E6=88=96= =E6=95=A3=E5=8F=91=EF=BC=89=E6=9C=AC=E9=82=AE=E4=BB=B6=E4=B8=AD > =E7=9A=84=E4=BF=A1=E6=81=AF=E3=80=82=E5=A6=82=E6=9E=9C=E6=82=A8=E9=94=99= =E6=94=B6=E4=BA=86=E6=9C=AC=E9=82=AE=E4=BB=B6=EF=BC=8C=E8=AF=B7=E6=82=A8=E7= =AB=8B=E5=8D=B3=E7=94=B5=E8=AF=9D=E6=88=96=E9=82=AE=E4=BB=B6=E9=80=9A=E7=9F= =A5=E5=8F=91=E4=BB=B6=E4=BA=BA=E5=B9=B6=E5=88=A0=E9=99=A4=E6=9C=AC=E9=82=AE= =E4=BB=B6=EF=BC=81 > This e-mail and its attachments contain confidential information from > HUAWEI, which > is intended only for the person or entity whose address is listed above. > Any use of the > information contained herein in any way (including, but not limited to, > total or partial > disclosure, reproduction, or dissemination) by persons other than the > intended > recipient(s) is prohibited. If you receive this e-mail in error, please > notify the sender by > phone or email immediately and delete it! > > > > *=E5=8F=91=E4=BB=B6=E4=BA=BA**:* Andy Bierman [mailto:andy@yumaworks.com = ] > *=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4**:* 2019=E5=B9=B49=E6=9C=8810=E6=97= =A5 10:56 > *=E6=94=B6=E4=BB=B6=E4=BA=BA**:* Fengchong (frank) > *=E6=8A=84=E9=80=81**:* Rob Wilton (rwilton) ; netmod@= ietf.org; > Yangang > *=E4=B8=BB=E9=A2=98**:* Re: [netmod] Please clarify implementation about = =E2=80=98when=E2=80=99 > > > > > > > > On Mon, Sep 9, 2019 at 7:40 PM Fengchong (frank) < > frank.fengchong@huawei.com> wrote: > > Andy, > > Whether all constraints on content in parameter will not be > evaluated in payload parsing phase, for example, a leaf=E2=80=99s value e= xceed > range? > > Netconf server should treat it as a block data? > > > > > > Field validation and datastore validation are 2 different things. > > when-stmt processing is neither. It is by far the hardest part of an > automated server to get right. > > > > Another question: > > > > In edit-config processing phase, whether constraints on content in > parameter needs be evaluated? > > If yes, when configuration modification cause when condition is evaluate= d > to false, the node tagged when will be automatically deleted by system. > > Then, in scene 2, whether different result would occur according differen= t > process order? > > > > > > Since the parameter is anyxml, the YANG constraints defined on > datastore contents > > are not enforced as part of RPC input validation. > > > > It would be nice if NETCONF defined behavior for providing data > that will get deleted > > immediately by the server. We have a CLI parameter for this since some > vendors want to > > treat this as an error and other just silently delete nodes. Note that > when-stmt can silently > > delete existing nodes not included in the edit. (Lada does not agree this > is how it should work, > > so we need yang-next to decide. Maybe NETCONF needs a --force parameter > for this purpose.) > > > > > > Andy > > > > > > > ------------------------------ > > =E5=8D=8E=E4=B8=BA=E6=8A=80=E6=9C=AF=E6=9C=89=E9=99=90=E5=85=AC=E5=8F=B8 = Huawei Technologies Co., Ltd. > > [image: Company_logo] > > =E4=B8=AA=E4=BA=BA=E7=AD=BE=E5=90=8D=EF=BC=9A=E5=86=AF=E5=86=B2 > =E6=89=8B =E6=9C=BA=EF=BC=9A13776612983 > =E7=94=B5=E5=AD=90=E9=82=AE=E4=BB=B6=EF=BC=9Afrank.fengchong@huawei.com > =E5=85=AC=E5=8F=B8=E7=BD=91=E5=9D=80=EF=BC=9Awww.huawei.com > ------------------------------ > > =EF=BB=BF =E6=9C=AC=E9=82=AE=E4=BB=B6=E5=8F=8A=E5=85=B6=E9=99=84=E4=BB=B6= =E5=90=AB=E6=9C=89=E5=8D=8E=E4=B8=BA=E5=85=AC=E5=8F=B8=E7=9A=84=E4=BF=9D=E5= =AF=86=E4=BF=A1=E6=81=AF=EF=BC=8C=E4=BB=85=E9=99=90=E4=BA=8E=E5=8F=91=E9=80= =81=E7=BB=99=E4=B8=8A=E9=9D=A2=E5=9C=B0=E5=9D=80=E4=B8=AD=E5=88=97=E5=87=BA= =E7=9A=84=E4=B8=AA=E4=BA=BA=E6=88=96=E7=BE=A4=E7=BB=84=E3=80=82=E7=A6=81 > =E6=AD=A2=E4=BB=BB=E4=BD=95=E5=85=B6=E4=BB=96=E4=BA=BA=E4=BB=A5=E4=BB=BB= =E4=BD=95=E5=BD=A2=E5=BC=8F=E4=BD=BF=E7=94=A8=EF=BC=88=E5=8C=85=E6=8B=AC=E4= =BD=86=E4=B8=8D=E9=99=90=E4=BA=8E=E5=85=A8=E9=83=A8=E6=88=96=E9=83=A8=E5=88= =86=E5=9C=B0=E6=B3=84=E9=9C=B2=E3=80=81=E5=A4=8D=E5=88=B6=E3=80=81=E6=88=96= =E6=95=A3=E5=8F=91=EF=BC=89=E6=9C=AC=E9=82=AE=E4=BB=B6=E4=B8=AD > =E7=9A=84=E4=BF=A1=E6=81=AF=E3=80=82=E5=A6=82=E6=9E=9C=E6=82=A8=E9=94=99= =E6=94=B6=E4=BA=86=E6=9C=AC=E9=82=AE=E4=BB=B6=EF=BC=8C=E8=AF=B7=E6=82=A8=E7= =AB=8B=E5=8D=B3=E7=94=B5=E8=AF=9D=E6=88=96=E9=82=AE=E4=BB=B6=E9=80=9A=E7=9F= =A5=E5=8F=91=E4=BB=B6=E4=BA=BA=E5=B9=B6=E5=88=A0=E9=99=A4=E6=9C=AC=E9=82=AE= =E4=BB=B6=EF=BC=81 > This e-mail and its attachments contain confidential information from > HUAWEI, which > is intended only for the person or entity whose address is listed above. > Any use of the > information contained herein in any way (including, but not limited to, > total or partial > disclosure, reproduction, or dissemination) by persons other than the > intended > recipient(s) is prohibited. If you receive this e-mail in error, please > notify the sender by > phone or email immediately and delete it! > > > > *=E5=8F=91=E4=BB=B6=E4=BA=BA**:* Andy Bierman [mailto:andy@yumaworks.com] > *=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4**:* 2019=E5=B9=B49=E6=9C=8810=E6=97= =A5 10:19 > *=E6=94=B6=E4=BB=B6=E4=BA=BA**:* Fengchong (frank) > *=E6=8A=84=E9=80=81**:* Rob Wilton (rwilton) ; netmod@= ietf.org; > Yangang > *=E4=B8=BB=E9=A2=98**:* Re: [netmod] Please clarify implementation about = =E2=80=98when=E2=80=99 > > > > > > > > On Mon, Sep 9, 2019 at 7:10 PM Fengchong (frank) < > frank.fengchong@huawei.com> wrote: > > Hi andy, > > > > You only talk about the constraints on rpc operation=E2=80=99s parameter? > > > > Do you have any opinion about my question? > > > > 8.3.1 does not apply to leaf 'b'. > > The RPC parameter is called 'config'. > > It has no when-stmts to evaluate. > > Rob is correct. > > His example shows what 8.3.1 would cover. > > > > Andy > > > > > > > ------------------------------ > > =E5=8D=8E=E4=B8=BA=E6=8A=80=E6=9C=AF=E6=9C=89=E9=99=90=E5=85=AC=E5=8F=B8 = Huawei Technologies Co., Ltd. > > [image: Company_logo] > > =E4=B8=AA=E4=BA=BA=E7=AD=BE=E5=90=8D=EF=BC=9A=E5=86=AF=E5=86=B2 > =E6=89=8B =E6=9C=BA=EF=BC=9A13776612983 > =E7=94=B5=E5=AD=90=E9=82=AE=E4=BB=B6=EF=BC=9Afrank.fengchong@huawei.com > =E5=85=AC=E5=8F=B8=E7=BD=91=E5=9D=80=EF=BC=9Awww.huawei.com > ------------------------------ > > =EF=BB=BF =E6=9C=AC=E9=82=AE=E4=BB=B6=E5=8F=8A=E5=85=B6=E9=99=84=E4=BB=B6= =E5=90=AB=E6=9C=89=E5=8D=8E=E4=B8=BA=E5=85=AC=E5=8F=B8=E7=9A=84=E4=BF=9D=E5= =AF=86=E4=BF=A1=E6=81=AF=EF=BC=8C=E4=BB=85=E9=99=90=E4=BA=8E=E5=8F=91=E9=80= =81=E7=BB=99=E4=B8=8A=E9=9D=A2=E5=9C=B0=E5=9D=80=E4=B8=AD=E5=88=97=E5=87=BA= =E7=9A=84=E4=B8=AA=E4=BA=BA=E6=88=96=E7=BE=A4=E7=BB=84=E3=80=82=E7=A6=81 > =E6=AD=A2=E4=BB=BB=E4=BD=95=E5=85=B6=E4=BB=96=E4=BA=BA=E4=BB=A5=E4=BB=BB= =E4=BD=95=E5=BD=A2=E5=BC=8F=E4=BD=BF=E7=94=A8=EF=BC=88=E5=8C=85=E6=8B=AC=E4= =BD=86=E4=B8=8D=E9=99=90=E4=BA=8E=E5=85=A8=E9=83=A8=E6=88=96=E9=83=A8=E5=88= =86=E5=9C=B0=E6=B3=84=E9=9C=B2=E3=80=81=E5=A4=8D=E5=88=B6=E3=80=81=E6=88=96= =E6=95=A3=E5=8F=91=EF=BC=89=E6=9C=AC=E9=82=AE=E4=BB=B6=E4=B8=AD > =E7=9A=84=E4=BF=A1=E6=81=AF=E3=80=82=E5=A6=82=E6=9E=9C=E6=82=A8=E9=94=99= =E6=94=B6=E4=BA=86=E6=9C=AC=E9=82=AE=E4=BB=B6=EF=BC=8C=E8=AF=B7=E6=82=A8=E7= =AB=8B=E5=8D=B3=E7=94=B5=E8=AF=9D=E6=88=96=E9=82=AE=E4=BB=B6=E9=80=9A=E7=9F= =A5=E5=8F=91=E4=BB=B6=E4=BA=BA=E5=B9=B6=E5=88=A0=E9=99=A4=E6=9C=AC=E9=82=AE= =E4=BB=B6=EF=BC=81 > This e-mail and its attachments contain confidential information from > HUAWEI, which > is intended only for the person or entity whose address is listed above. > Any use of the > information contained herein in any way (including, but not limited to, > total or partial > disclosure, reproduction, or dissemination) by persons other than the > intended > recipient(s) is prohibited. If you receive this e-mail in error, please > notify the sender by > phone or email immediately and delete it! > > > > *=E5=8F=91=E4=BB=B6=E4=BA=BA**:* Andy Bierman [mailto:andy@yumaworks.com] > *=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4**:* 2019=E5=B9=B49=E6=9C=8810=E6=97= =A5 1:14 > *=E6=94=B6=E4=BB=B6=E4=BA=BA**:* Rob Wilton (rwilton) > *=E6=8A=84=E9=80=81**:* Fengchong (frank) ; n= etmod@ietf.org; > Yangang > *=E4=B8=BB=E9=A2=98**:* Re: [netmod] Please clarify implementation about = =E2=80=98when=E2=80=99 > > > > Hi, > > > > None of the operations that accept or return datastore contents expose th= e > datastore objects > > in the RPC parameters. They are always anyxml or anydata. This means tha= t > > there are no descendant data nodes defined at all according to the RPC > operation > > and therefore the constraints on those nodes do not exist in the RPC > operation either. > > > > > > > > On Mon, Sep 9, 2019 at 6:41 AM Rob Wilton (rwilton) > wrote: > > Hi Frank, > > > > My interpretation of what the expected behaviour is as follows. > > > > For =E2=80=9Cscene 1=E2=80=9D, the config change is accepted because the = result of the > config datastore after the edit-config has been applied is valid. > > > > For =E2=80=9Cscene 2=E2=80=9D, the config change is rejected because the = result of the > config datastore after the edit-config has been applied is invalid. > > > > My interpretation is that the block of text in 8.3.1 payload parsing is > primary intended to refer to RFC input. E.g. if the RPC was defined > something like below, then the =E2=80=98when=E2=80=99 rule in 8.3.1 would= enforce that a > zip-code can only be provided if the country is the USA. > > > > rpc rock-the-house { > > input { > > leaf country { > > type string; > > } > > leaf zip-code { > > when =E2=80=9C../country =3D =E2=80=98usa=E2=80=99=E2=80=9D; > > type string; > > } > > } > > } > > > > Thanks, > > Rob > > > > > > > > *From:* netmod *On Behalf Of *Fengchong (frank) > *Sent:* 06 September 2019 08:19 > *To:* netmod@ietf.org > *Cc:* Yangang > *Subject:* [netmod] Please clarify implementation about =E2=80=98when=E2= =80=99 > > > > Hi all, > > > > In RFC7950 secton 8, several description about when=EF=BC=9A > In section 8.2 . > Configuration Data Modifications > > o If a request modifies a configuration data node such that any > > node's "when" expression becomes false, then the node in the data > > tree with the "when" expression is deleted by the server. > In 8.3.1 . Payload > Parsing > > o If data for a node tagged with "when" is present and the "when" > > condition evaluates to "false", the server MUST reply with an > > "unknown-element" in the . > > In 8.3.2 . NETCONF > Processing > > Modification requests for nodes tagged with "when", and the "when" > > condition evaluates to "false". In this case, the server MUST > > reply with an "unknown-element" in the . > > > > YANG module=EF=BC=9A > > module foo { > > namespace =E2=80=9Chttp://foo.com=E2=80=9D; > > prefix =E2=80=9Cfoo=E2=80=9D; > > Leaf a {=E2=80=A6} > > Leaf b { > > When =E2=80=9Ca =3D 10=E2=80=9D; > > } > > } > Scene 1: > > The first edit-config request: > > > > > > > > > > > > 3 > > > > > > This request will set a =3D 3. > > > > The second request: > > > > > > > > > > > > 10 > > 5 > > > > > > > > According 8.3.1, in rpc payload parsing phase, the a=E2=80=99s value in c= andidate > datastore is 3,so leaf b=E2=80=99s when condition is evaluated to false, = server > will report =E2=80=98unknown-element=E2=80=99 error. > > Is it expected by user? > Scene 2: > > The first edit-config request: > > > > > > > > > > > > 10 > > > > > > This request will set a =3D 10. > > > > The second request: > > > > > > > > > > > > 3 > > 5 > > > > > > According 8.3.1, in rpc payload parsing phase, the a=E2=80=99s value in c= andidate > datastore is 10, so leaf b=E2=80=99s when condition is evaluated to true,= server > will accept this request in payload parsing phase. > > > > In edit-config request processing phase, if leaf a=E2=80=99s modification= is > processed firstly, the a=E2=80=99s value will be changed to 3, so the b= =E2=80=99s when > condition will be false, when server process b=E2=80=99s modification, b = will be > treated as unknown-element, the edit-config request will fail. > > If leaf b=E2=80=99s modification is processed firstly, server will accept= this > modification ,because b=E2=80=99s when condition is true, and when server= process > a=E2=80=99s modification , this modification will be accepted, and b=E2= =80=99s when > condition will be evaluated to false, leaf b will be deleted automaticall= y, > the edit-config request will be OK. > > > > How server should process this situation? > > > > _______________________________________________ > netmod mailing list > netmod@ietf.org > https://www.ietf.org/mailman/listinfo/netmod > > --000000000000099a0905936cc564 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable


=
On Wed, Sep 25, 2019 at 7:54 PM Qin W= u <bill.wu@huawei.com> wrot= e:

=E5=8F=91=E4=BB=B6=E4=BA=BA: Andy Bie= rman [mailto:andy@y= umaworks.com]
=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4: 2019=E5=B9=B49=E6=9C=8826=E6=97=A5 0:00
=E6=94=B6=E4=BB=B6=E4=BA=BA: Sterne, Jason (Nokia - CA/Ottawa) <jason.sterne@nokia.com>
=E6=8A=84=E9=80=81: Qin Wu <= bill.wu@huawei.com>; Fengchong (frank) <frank.fengchong@huawei.com>; = netmod@ietf.org; Y= angang <yangang@= huawei.com>
=E4=B8=BB=E9=A2=98: Re: [netmod] =E7=AD=94=E5=A4=8D: =E7=AD=94=E5=A4=8D: Please clarify implementation about =E2=80=98when=E2=80=99

=C2=A0

=C2=A0

=C2=A0

On Wed, Sep 25, 2019 at 8:59 AM= Andy Bierman <a= ndy@yumaworks.com> wrote:

=C2=A0

=C2=A0

On Wed, Sep 25, 2019 at 8:44 AM= Sterne, Jason (Nokia - CA/Ottawa) <jason.sterne@nokia.com> wrote:=

Processing order should not matter. The evaluation= of the 'when' statement should be done assuming an atomic application of the edit-config.<= u>

=C2=A0

I agree that a standards compliant server should d= o as Rob said:

=C2=A0

- For =E2=80=9Cscene 1=E2=80=9D, the config change= is accepted because the result of the config datastore after the edit-config has been applied is valid.<= u>

- For =E2=80=9Cscene 2=E2=80=9D, the config change= is rejected because the result of the config datastore after the edit-config has been applied is invalid.

=C2=A0

From an implementation that may indeed mean proces= sing the 'when' after a first pass that sets the various leafs to tentative values. But that's implementation detail.

=C2=A0

IMO the auto-clearing behavior of 'when' m= ay be complicated but that is how it is defined (same with 'choice'). Clients can and should depend on things being automatic= ally deleted. If you want validation errors (i.e. force the client to clear= all the dependant leafs instead of auto-clearing) then use a 'must'= ; statement.

=C2=A0

[Qin]: Good clarification.<= u>

=C2=A0

+1

=C2=A0

YANG clearly defines "must= " and "when" with different behavior.

A server that does not implemen= t the auto-delete aspects of when-stmt is not compliant to the RFC.<= u>

=C2=A0

=C2=A0

=C2=A0

oops -- s/must-stmt/when-stmt/<= u>

=C2=A0

[Qin]: implement the auto-delet= e aspects of must-stmt is a must for server or implement client force delet= e aspects of must stmt is a must for a server?

So for both=C2=A0 =E2= =80=9Cscene 1=E2=80=9D and =E2=80=9Cscene 2=E2=80=9D, the client = will not receive validation error unless when statement is replaced with mu= st statement in the below example model?

I thought validation error will= still be received when the config change is reject in =E2=80=9Cscene 2=E2=80=9D.



sorry for the confusion. i= t was right the first time.
when-stmt has auto-delete.
= must-stmt has error instead of auto-delete.

=C2=A0= Andy

=
=

Jason

=C2=A0

Andy

=C2=A0

=C2=A0

From: netmod <netmod-bo= unces@ietf.org> On Behalf Of Qin Wu
Sent: Tuesday, September 10, 2019 10:33 PM
To: Fengchong (frank) <frank.fengchong@huawei.com>; Andy Bierman <= andy@yumaworks.com<= /a>>
Cc: netmod@ietf= .org; Yangang <yangang@huawei.com>
Subject: [netmod] =E7=AD=94=E5=A4=8D: =E7= =AD=94=E5=A4=8D: Please clarify implementation about =E2=80=98when= =E2=80=99

=C2=A0

Why processing order matter= ? My interpretation is both leaf node values (i.e.,leaf a, leaf b) should be validated together and commit as a whole,

RFC6241 said:

=E2=80=9C

If the device is unable to commit all of the chang= es in the

=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0 candidate configuration datastore, then the running

=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0 configuration MUST remain unchanged.

=E2=80=9D

So validate the leaf node v= alue in the edit-config request (message content validation) is not important, validate the leaf node value that is applied to <runn= ing> (datastore validation) is the key.

=C2=A0

I think what you want to raise is the server =
should hold on to send reply with an "unknown-element" <error-=
tag> in the <rpc-error> during payload parsing phase and NETCONF &=
lt;edit-config> 
Processing until all validation complete, oth=
erwise it seems server will 
Send multiple rply with "unknown-element=
" <error-tag> in the <rpc-error> which seems not reasonabl=
e.
=C2=A0<=
/u>
-Qin

=E5=8F=91=E4=BB=B6=E4=BA=BA: netmod [mailt= o:netmod-bounces@ietf.org] =E4=BB=A3=E8=A1=A8 Fengchong (frank)
=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4= : 2019=E5=B9=B49=E6=9C=8811=E6=97=A5 9:29
=E6=94=B6=E4=BB=B6=E4=BA=BA: Andy B= ierman <andy@yumaworks= .com>
=E6=8A=84=E9=80=81: netmod@ietf.org; Y= angang <yangang@= huawei.com>
=E4=B8=BB=E9=A2=98: [netmod] =E7=AD=94=E5=A4=8D: Please clarify implementation about =E2=80=98whe= n=E2=80=99

=C2=A0

= Andy,

=C2=A0

Whether different result wo= uld occur according different process order?

According 8.3.2

if server process =E2=80=98= a=3D 3=E2=80=99 firstly, b will be deleted by system and becomes a non-exis= t schema node, and then =C2=A0when =E2=80=98b=3D5=E2=80=99 is processed , se= rver will report a =E2=80=98unknown-element=E2=80=99 error.

But if server process =E2= =80=98b=3D5=E2=80=99 firstly, it will be accepted by server, and then when = =E2=80=98a=3D3=E2=80=99 is processed, b will be deleted by system, but report OK.

=C2=A0

If sec 8.3.2 is not right. = What is the right?

When node a and node b in t= he same request, and b tagged when condition, a=E2=80=99s value will cause b=E2=80=99s condition is evaluated to false, which is more prior?

According you and Rob=E2=80= =99s interpretation , maybe node =E2=80=99a=E2=80=99 is more prior? If yes,= why node =E2=80=98b=E2=80=99 should be processed later?

=C2=A0

I think whether in edit-con= fig processing phase the configuration tagged when should not be evaluated and be delayed to commit or validate?

When commit or validate ope= ration is issued,=C2=A0 the data node tagged when will be evaluated, and if it=E2=80=99s evaluated to false, this data will be deleted by syste= m immediately, server should not report any error.

=C2=A0

=C2=A0

=E5=8D=8E=E4=B8= =BA=E6=8A=80=E6=9C=AF=E6=9C=89=E9=99=90=E5=85=AC=E5=8F=B8 Huawei Technologies Co., Ltd.

= 3D"Company_logo"

=E4=B8=AA=E4=BA= =BA=E7=AD=BE=E5=90=8D=EF=BC=9A=E5=86=AF=E5=86=B2
=E6=89=8B=E3=80=80=E3=80=80=E6= =9C=BA=EF=BC=9A1= 3776612983
=E7=94=B5=E5=AD=90=E9=82=AE=E4= =BB=B6=EF=BC=9A<= a href=3D"mailto:frank.fengchong@huawei.com" target=3D"_blank">frank.fengch= ong@huawei.com
=E5=85=AC=E5=8F=B8=E7=BD=91=E5= =9D=80=EF=BC=9A<= a href=3D"http://www.huawei.com" target=3D"_blank">www.huawei.com

=EF=BB=BF =E6=9C=AC=E9=82=AE=E4=BB= =B6=E5=8F=8A=E5=85=B6=E9=99=84=E4=BB=B6=E5=90=AB=E6=9C=89=E5=8D=8E=E4=B8=BA= =E5=85=AC=E5=8F=B8=E7=9A=84=E4=BF=9D=E5=AF=86=E4=BF=A1=E6=81=AF=EF=BC=8C=E4= =BB=85=E9=99=90=E4=BA=8E=E5=8F=91=E9=80=81=E7=BB=99=E4=B8=8A=E9=9D=A2=E5=9C= =B0=E5=9D=80=E4=B8=AD=E5=88=97=E5=87=BA=E7=9A=84=E4=B8=AA=E4=BA=BA=E6=88=96= =E7=BE=A4=E7=BB=84=E3=80=82=E7=A6=81
=E6=AD=A2=E4=BB=BB=E4=BD= =95=E5=85=B6=E4=BB=96=E4=BA=BA=E4=BB=A5=E4=BB=BB=E4=BD=95=E5=BD=A2=E5=BC=8F= =E4=BD=BF=E7=94=A8=EF=BC=88=E5=8C=85=E6=8B=AC=E4=BD=86=E4=B8=8D=E9=99=90=E4= =BA=8E=E5=85=A8=E9=83=A8=E6=88=96=E9=83=A8=E5=88=86=E5=9C=B0=E6=B3=84=E9=9C= =B2=E3=80=81=E5=A4=8D=E5=88=B6=E3=80=81=E6=88=96=E6=95=A3=E5=8F=91=EF=BC=89= =E6=9C=AC=E9=82=AE=E4=BB=B6=E4=B8=AD
=E7=9A=84=E4=BF=A1=E6=81= =AF=E3=80=82=E5=A6=82=E6=9E=9C=E6=82=A8=E9=94=99=E6=94=B6=E4=BA=86=E6=9C=AC= =E9=82=AE=E4=BB=B6=EF=BC=8C=E8=AF=B7=E6=82=A8=E7=AB=8B=E5=8D=B3=E7=94=B5=E8= =AF=9D=E6=88=96=E9=82=AE=E4=BB=B6=E9=80=9A=E7=9F=A5=E5=8F=91=E4=BB=B6=E4=BA= =BA=E5=B9=B6=E5=88=A0=E9=99=A4=E6=9C=AC=E9=82=AE=E4=BB=B6=EF=BC=81
This e-mail and its attachments contain confidential information from HUAWE= I, which
is intended only for the person or entity whose address is listed above. An= y use of the
information contained herein in any way (including, but not limited to, tot= al or partial
disclosure, reproduction, or dissemination) by persons other than the inten= ded
recipient(s) is prohibited. If you receive this e-mail in error, please not= ify the sender by
phone or email immediately and delete it!

=C2=A0

=E5=8F=91=E4=BB=B6=E4=BA=BA: Andy Bierman [mail= to:andy@yumaworks.com]
=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4= : 2019=E5=B9=B49=E6=9C=8810=E6=97=A5 10:56
=E6=94=B6=E4=BB=B6=E4=BA=BA: Fengch= ong (frank) <frank.fengchong@huawei.com>
=E6=8A=84=E9=80=81: Rob Wilton (rwilton) <rwilt= on@cisco.com>; netmod@ietf.org; Y= angang <yangang@= huawei.com>
=E4=B8=BB=E9=A2=98: Re: [netmod] Please clarify implementation about =E2=80=98when=E2=80=99

=C2=A0

=C2=A0

=C2=A0

On Mon, Sep 9, 2019 at 7:40 PM = Fengchong (frank) <frank.fengchong@huawei.com> wrote:

Andy,

Whether all constraints on = content in <config> parameter will not be evaluated in payload parsing phase, for example, a leaf=E2=80=99s value exceed range?

Netconf server should treat= it as a block data?

=C2=A0

=C2=A0

Field validation and datastore = validation are 2 different things.

when-stmt processing is neither= . It is by far the hardest part of an automated server to get right.=

=C2=A0

Another question:

=C2=A0

In edit-config processing p= hase, whether constraints on content in <config> parameter needs be evaluated?

If yes, when =C2=A0configur= ation modification cause when condition is evaluated to false, the node tagged when will be automatically deleted by system.

Then, in scene 2, whether d= ifferent result would occur according different process order?

=C2=A0

=C2=A0

Since the <config> parame= ter is anyxml, the YANG constraints defined on datastore contents

are not enforced as part of RPC= input validation.

=C2=A0

It would be nice if NETCONF def= ined behavior for providing <config> data that will get deleted

immediately by the server.=C2= =A0 We have a CLI parameter for this since some vendors want to

treat this as an error and othe= r just silently delete nodes.=C2=A0 Note that when-stmt can silently=

delete existing nodes not inclu= ded in the edit. (Lada does not agree this is how it should work,

so we need yang-next to decide.= Maybe NETCONF needs a --force parameter for this purpose.)

=C2=A0

=C2=A0

Andy

=C2=A0

=C2=A0

=C2=A0

=E5=8D=8E=E4=B8= =BA=E6=8A=80=E6=9C=AF=E6=9C=89=E9=99=90=E5=85=AC=E5=8F=B8 Huawei Technologies Co., Ltd.

= =3D"Company_logo"

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=E6=89=8B=E3=80=80=E3=80=80=E6= =9C=BA=EF=BC=9A1= 3776612983
=E7=94=B5=E5=AD=90=E9=82=AE=E4= =BB=B6=EF=BC=9A<= a href=3D"mailto:frank.fengchong@huawei.com" target=3D"_blank">frank.fengch= ong@huawei.com
=E5=85=AC=E5=8F=B8=E7=BD=91=E5= =9D=80=EF=BC=9A<= a href=3D"http://www.huawei.com" target=3D"_blank">www.huawei.com

=EF=BB=BF =E6=9C=AC=E9=82=AE=E4=BB= =B6=E5=8F=8A=E5=85=B6=E9=99=84=E4=BB=B6=E5=90=AB=E6=9C=89=E5=8D=8E=E4=B8=BA= =E5=85=AC=E5=8F=B8=E7=9A=84=E4=BF=9D=E5=AF=86=E4=BF=A1=E6=81=AF=EF=BC=8C=E4= =BB=85=E9=99=90=E4=BA=8E=E5=8F=91=E9=80=81=E7=BB=99=E4=B8=8A=E9=9D=A2=E5=9C= =B0=E5=9D=80=E4=B8=AD=E5=88=97=E5=87=BA=E7=9A=84=E4=B8=AA=E4=BA=BA=E6=88=96= =E7=BE=A4=E7=BB=84=E3=80=82=E7=A6=81
=E6=AD=A2=E4=BB=BB=E4=BD= =95=E5=85=B6=E4=BB=96=E4=BA=BA=E4=BB=A5=E4=BB=BB=E4=BD=95=E5=BD=A2=E5=BC=8F= =E4=BD=BF=E7=94=A8=EF=BC=88=E5=8C=85=E6=8B=AC=E4=BD=86=E4=B8=8D=E9=99=90=E4= =BA=8E=E5=85=A8=E9=83=A8=E6=88=96=E9=83=A8=E5=88=86=E5=9C=B0=E6=B3=84=E9=9C= =B2=E3=80=81=E5=A4=8D=E5=88=B6=E3=80=81=E6=88=96=E6=95=A3=E5=8F=91=EF=BC=89= =E6=9C=AC=E9=82=AE=E4=BB=B6=E4=B8=AD
=E7=9A=84=E4=BF=A1=E6=81= =AF=E3=80=82=E5=A6=82=E6=9E=9C=E6=82=A8=E9=94=99=E6=94=B6=E4=BA=86=E6=9C=AC= =E9=82=AE=E4=BB=B6=EF=BC=8C=E8=AF=B7=E6=82=A8=E7=AB=8B=E5=8D=B3=E7=94=B5=E8= =AF=9D=E6=88=96=E9=82=AE=E4=BB=B6=E9=80=9A=E7=9F=A5=E5=8F=91=E4=BB=B6=E4=BA= =BA=E5=B9=B6=E5=88=A0=E9=99=A4=E6=9C=AC=E9=82=AE=E4=BB=B6=EF=BC=81
This e-mail and its attachments contain confidential information from HUAWE= I, which
is intended only for the person or entity whose address is listed above. An= y use of the
information contained herein in any way (including, but not limited to, tot= al or partial
disclosure, reproduction, or dissemination) by persons other than the inten= ded
recipient(s) is prohibited. If you receive this e-mail in error, please not= ify the sender by
phone or email immediately and delete it!

=C2=A0

=E5=8F=91=E4=BB=B6=E4=BA=BA: Andy Bierman [mailto:andy@yumaworks.com]
=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4= : 2019=E5=B9=B49=E6=9C=8810=E6=97=A5 10:19
=E6=94=B6=E4=BB=B6=E4=BA=BA: Fengch= ong (frank) <frank.fengchong@huawei.com>
=E6=8A=84=E9=80=81: Rob Wilton (rwilton) <rwilt= on@cisco.com>; netmod@ietf.org; Y= angang <yangang@= huawei.com>
=E4=B8=BB=E9=A2=98: Re: [netmod] Please clarify implementation about =E2=80=98when=E2=80=99

=C2=A0

=C2=A0

=C2=A0

On Mon, Sep 9, 2019 at 7:10 PM = Fengchong (frank) <frank.fengchong@huawei.com> wrote:

Hi andy,

=C2=A0

You only talk about the con= straints on rpc operation=E2=80=99s parameter?<= u>

=C2=A0

Do you have any opinion abo= ut my question?

=C2=A0

8.3.1 does not apply to leaf &#= 39;b'.

The RPC parameter is called = 9;config'.

It has no when-stmts to evaluat= e.

Rob is correct.

His example shows what 8.3.1 wo= uld cover.

=C2=A0

Andy

=C2=A0

=C2=A0

=C2=A0

=E5=8D=8E=E4=B8= =BA=E6=8A=80=E6=9C=AF=E6=9C=89=E9=99=90=E5=85=AC=E5=8F=B8 Huawei Technologies Co., Ltd.

= 3D"Company_logo"=

=E4=B8=AA=E4=BA= =BA=E7=AD=BE=E5=90=8D=EF=BC=9A=E5=86=AF=E5=86=B2
=E6=89=8B=E3=80=80=E3=80=80=E6= =9C=BA=EF=BC=9A1= 3776612983
=E7=94=B5=E5=AD=90=E9=82=AE=E4= =BB=B6=EF=BC=9A<= a href=3D"mailto:frank.fengchong@huawei.com" target=3D"_blank">frank.fengch= ong@huawei.com
=E5=85=AC=E5=8F=B8=E7=BD=91=E5= =9D=80=EF=BC=9A<= a href=3D"http://www.huawei.com" target=3D"_blank">www.huawei.com

=EF=BB=BF =E6=9C=AC=E9=82=AE=E4=BB= =B6=E5=8F=8A=E5=85=B6=E9=99=84=E4=BB=B6=E5=90=AB=E6=9C=89=E5=8D=8E=E4=B8=BA= =E5=85=AC=E5=8F=B8=E7=9A=84=E4=BF=9D=E5=AF=86=E4=BF=A1=E6=81=AF=EF=BC=8C=E4= =BB=85=E9=99=90=E4=BA=8E=E5=8F=91=E9=80=81=E7=BB=99=E4=B8=8A=E9=9D=A2=E5=9C= =B0=E5=9D=80=E4=B8=AD=E5=88=97=E5=87=BA=E7=9A=84=E4=B8=AA=E4=BA=BA=E6=88=96= =E7=BE=A4=E7=BB=84=E3=80=82=E7=A6=81
=E6=AD=A2=E4=BB=BB=E4=BD= =95=E5=85=B6=E4=BB=96=E4=BA=BA=E4=BB=A5=E4=BB=BB=E4=BD=95=E5=BD=A2=E5=BC=8F= =E4=BD=BF=E7=94=A8=EF=BC=88=E5=8C=85=E6=8B=AC=E4=BD=86=E4=B8=8D=E9=99=90=E4= =BA=8E=E5=85=A8=E9=83=A8=E6=88=96=E9=83=A8=E5=88=86=E5=9C=B0=E6=B3=84=E9=9C= =B2=E3=80=81=E5=A4=8D=E5=88=B6=E3=80=81=E6=88=96=E6=95=A3=E5=8F=91=EF=BC=89= =E6=9C=AC=E9=82=AE=E4=BB=B6=E4=B8=AD
=E7=9A=84=E4=BF=A1=E6=81= =AF=E3=80=82=E5=A6=82=E6=9E=9C=E6=82=A8=E9=94=99=E6=94=B6=E4=BA=86=E6=9C=AC= =E9=82=AE=E4=BB=B6=EF=BC=8C=E8=AF=B7=E6=82=A8=E7=AB=8B=E5=8D=B3=E7=94=B5=E8= =AF=9D=E6=88=96=E9=82=AE=E4=BB=B6=E9=80=9A=E7=9F=A5=E5=8F=91=E4=BB=B6=E4=BA= =BA=E5=B9=B6=E5=88=A0=E9=99=A4=E6=9C=AC=E9=82=AE=E4=BB=B6=EF=BC=81
This e-mail and its attachments contain confidential information from HUAWE= I, which
is intended only for the person or entity whose address is listed above. An= y use of the
information contained herein in any way (including, but not limited to, tot= al or partial
disclosure, reproduction, or dissemination) by persons other than the inten= ded
recipient(s) is prohibited. If you receive this e-mail in error, please not= ify the sender by
phone or email immediately and delete it!

=C2=A0

=E5=8F=91=E4=BB=B6=E4=BA=BA: Andy Bierman [mailto:andy@yumaworks.com]
=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4= : 2019=E5=B9=B49=E6=9C=8810=E6=97=A5 1:14
=E6=94=B6=E4=BB=B6=E4=BA=BA: Rob Wi= lton (rwilton) <rwilt= on@cisco.com>
=E6=8A=84=E9=80=81: Fengchong (frank) <frank.fengchong@huawei.com>; netmod@ietf.org; Y= angang <yangang@= huawei.com>
=E4=B8=BB=E9=A2=98: Re: [netmod] Please clarify implementation about =E2=80=98when=E2=80=99

=C2=A0

Hi,=

=C2=A0

None of the operations that acc= ept or return datastore contents expose the datastore objects

in the RPC parameters.=C2=A0 Th= ey are always anyxml or anydata. This means that

there are no descendant data no= des defined at all according to the RPC operation

and therefore the constraints o= n those nodes do not exist in the RPC operation either.

=C2=A0

=C2=A0

=C2=A0

On Mon, Sep 9, 2019 at 6:41 AM = Rob Wilton (rwilton) <rwilton@cisco.com> wrote:=

Hi Fra= nk,

=C2=A0=

My int= erpretation of what the expected behaviour is as follows.

=C2=A0=

For =E2=80=9Cscene 1=E2= =80=9D, the config cha= nge is accepted because the result of the config datastore after the edit-config has been applied is valid.

=C2=A0=

For =E2=80=9Cscene 2=E2= =80=9D, the config cha= nge is rejected because the result of the config datastore after the edit-config has been applied is invalid.

=C2=A0=

My int= erpretation is that the block of text in 8.3.1 payload parsing is primary i= ntended to refer to RFC input.=C2=A0 E.g. if the RPC was defined something like below, then the =E2=80=98when=E2=80=99 rule in 8.3.1 would enforce that a zip-code can only be provided if the country is the USA.

=C2=A0=

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0 rpc rock-the-house {

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0 input {

=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0leaf country {=

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 type string;

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0 }

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0 leaf zip-code {<= /u>

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 when =E2=80=9C../country =3D =E2=80= =98usa=E2=80=99=E2=80=9D;<= /p>

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 type string;

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0 }

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0 }

=C2=A0 =C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0}

=C2=A0=

Thanks= ,

Rob

=C2=A0=

=C2=A0=

=C2=A0=

Fro= m: netmod <netmod-bounces@iet= f.org> On Behalf Of Fengchong (frank)
Sent: 06 September 2019 08:19
To: netmod@ietf= .org
Cc: Yangang <yangang@huawei.com>
Subject: [netmod] Please clarify implementation about =E2=80=98when=E2=80=99

=C2=A0

Hi all,

=C2=A0

In RFC7950 secton 8, several de= scription about when=EF=BC=9A

In section 8.2.=C2=A0 Configuration Data Modi= fications

=C2=A0=C2=A0 o=C2=A0 If a request modifies a configuration data node = such that any

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 node's "when" expression= becomes false, then the node in the data

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 tree with the "when" express= ion is deleted by the server.

In 8.3.1.=C2=A0= Payload Parsing

=C2=A0=C2=A0=
 o=C2=A0 If data for a node tagged with "when" is present and the=
 "when"
=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0 condition evaluates to "false", the server MUS=
T reply with an
=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0 "unknown-element" <error-tag> in the <=
;rpc-error>.

In 8.3.2.=C2= =A0 NETCONF <edit-config> Processing

Modification=
 requests for nodes tagged with "when", and the "when"<=
/span>
=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0 condition evaluates to "false".=C2=A0 In this =
case, the server MUST

=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0 reply with an "unknown-element" <error-tag&=
gt; in the <rpc-error>.


=C2=A0


YANG module=EF=BC=9A


module foo {


=C2=A0=C2=A0 namespace
=E2=80=9Chttp://foo.com=E2=80=9D;


=C2=A0=C2=A0 prefix
=E2=80=9Cfoo=E2=80=9D;



Leaf a {=E2=80=A6}<=
span lang=3D"EN-CA">



Leaf b {



=C2=A0 When =E2=80=9Ca =3D=
 10=E2=80=9D;



}


}


Scene 1: 


The first edit-config request:<=
/span>


<edit-config>


=C2=A0=C2=A0 <target>


=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
<candidate/>


=C2=A0=C2=A0 </target>



=C2=A0=C2=A0=C2=A0<config>=
;


=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
<a xmlns=3D
=E2=80=9Chttp://foo.com=E2=80=9D>3</a&g=
t;


=C2=A0=C2=A0 </config>


</edit-config>


This request will set a =3D 3.<=
/span>


=C2=A0


The second request:


<edit-config>


=C2=A0=C2=A0 <target>


=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
<candidate/>


=C2=A0=C2=A0 </target>



=C2=A0=C2=A0=C2=A0<config>=
;


=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
<a xmlns=3D
=E2=80=9Chttp://foo.com=E2=80=9D>10</a&=
gt;


=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
<b xmlns=3D
=E2=80=9Chttp://foo.com=E2=80=9D>5</b&g=
t;


=C2=A0=C2=A0 </config>


</edit-config>


=C2=A0


Accord=
ing 8.3.1, in rpc payload parsing phase, the a=E2=80=99s
 value in candidate datastore is 3,so leaf b=E2=80=99s when=
 condition is evaluated to false, server will report
=E2=80=98unknown-element=E2=80=99 error.


Is it =
expected by user?


Scene 2:=



The first edit-config request:<=
/span>


<edit-config>


=C2=A0=C2=A0 <target>


=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
<candidate/>


=C2=A0=C2=A0 </target>



=C2=A0=C2=A0=C2=A0<config>=
;


=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
<a xmlns=3D
=E2=80=9Chttp://foo.com=E2=80=9D>10</a&=
gt;


=C2=A0=C2=A0 </config>


</edit-config>


This request will set a =3D 10.=



=C2=A0


The second request:


<edit-config>


=C2=A0=C2=A0 <target>


=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
<candidate/>


=C2=A0=C2=A0 </target>



=C2=A0=C2=A0=C2=A0<config>=
;


=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
<a xmlns=3D
=E2=80=9Chttp://foo.com=E2=80=9D>3</a&g=
t;


=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
<b xmlns=3D
=E2=80=9Chttp://foo.com=E2=80=9D>5</b&g=
t;


=C2=A0=C2=A0 </config>


</edit-config>


Accord=
ing 8.3.1, in rpc payload parsing phase, the a=E2=80=99s
 value in candidate datastore is 10, so leaf b=E2=80=99s wh=
en condition is evaluated to true, server will accept this request in paylo=
ad parsing phase.



=C2=A0=



In edi=
t-config request processing phase, if leaf a=E2=80=99s
 modification is processed firstly, the a=E2=80=99s value w=
ill be changed to 3, so the b=E2=80=
=99s
 when condition will be false, when server process b=E2=80=99s modification, b will be treated as unknown-element, the edit-config req=
uest will fail.



If lea=
f b=E2=80=99s modification is processed firstly,
 server will accept this modification ,because b=E2=80=99s =
when condition is true, and when server process a=E2=80=99s
 modification , this modification will be accepted, and b=E2=80=99s when condition will be evaluated to false, leaf b will be deleted =
automatically, the edit-config request will
 be OK.


=C2=A0=



How se=
rver should process this situation?


=C2=A0

_______________________________= ________________
netmod mailing list
netmod@ietf.org = https://www.ietf.org/mailman/listinfo/netmod

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X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.897 X-Spam-Level: X-Spam-Status: No, score=-1.897 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, SPF_HELO_NONE=0.001, SPF_NONE=0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id sYYsNMFRDCGD for ; Wed, 25 Sep 2019 23:50:06 -0700 (PDT) Received: from trail.lhotka.name (trail.lhotka.name [77.48.224.143]) by ietfa.amsl.com (Postfix) with ESMTP id 77F16120045 for ; Wed, 25 Sep 2019 23:50:05 -0700 (PDT) Received: by trail.lhotka.name (Postfix, from userid 109) id D1D191821292; Thu, 26 Sep 2019 08:51:37 +0200 (CEST) Received: from localhost (nat-1.nic.cz [217.31.205.1]) by trail.lhotka.name (Postfix) with ESMTPSA id EE2FE1821290; Thu, 26 Sep 2019 08:51:17 +0200 (CEST) From: Ladislav Lhotka To: Andy Bierman , "Sterne\, Jason \(Nokia - CA\/Ottawa\)" Cc: "netmod\@ietf.org" , Yangang In-Reply-To: References: <5756FB984666AD4BB8E1D63E2E3AA3D001F20F2C@dggemm513-mbs.china.huawei.com> <5756FB984666AD4BB8E1D63E2E3AA3D001F2CBA8@dggemm513-mbx.china.huawei.com> <5756FB984666AD4BB8E1D63E2E3AA3D001F2CBE4@dggemm513-mbx.china.huawei.com> <5756FB984666AD4BB8E1D63E2E3AA3D001F2D325@dggemm513-mbx.china.huawei.com> Mail-Followup-To: Andy Bierman , "Sterne\, Jason \(Nokia - CA\/Ottawa\)" , "netmod\@ietf.org" , Yangang Date: Thu, 26 Sep 2019 08:49:43 +0200 Message-ID: <87h84z4kmw.fsf@nic.cz> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Archived-At: Subject: Re: [netmod] =?utf-8?b?562U5aSNOiDnrZTlpI06IFBsZWFzZSBjbGFyaWZ5IGlt?= =?utf-8?b?cGxlbWVudGF0aW9uIGFib3V0IOKAmHdoZW7igJk=?= X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 26 Sep 2019 06:50:11 -0000 Andy Bierman writes: > On Wed, Sep 25, 2019 at 8:44 AM Sterne, Jason (Nokia - CA/Ottawa) < > jason.sterne@nokia.com> wrote: > >> Processing order should not matter. The evaluation of the 'when' stateme= nt >> should be done assuming an atomic application of the edit-config. >> >> >> >> I agree that a standards compliant server should do as Rob said: >> >> >> >> - For =E2=80=9Cscene 1=E2=80=9D, the config change is accepted because t= he result of the >> config datastore after the edit-config has been applied is valid. >> >> - For =E2=80=9Cscene 2=E2=80=9D, the config change is rejected because t= he result of the >> config datastore after the edit-config has been applied is invalid. >> >> >> >> From an implementation that may indeed mean processing the 'when' after a >> first pass that sets the various leafs to tentative values. But that's >> implementation detail. >> >> >> >> IMO the auto-clearing behavior of 'when' may be complicated but that is >> how it is defined (same with 'choice'). Clients can and should depend on >> things being automatically deleted. If you want validation errors (i.e. >> force the client to clear all the dependant leafs instead of auto-cleari= ng) >> then use a 'must' statement. >> >> >> > > +1 > > YANG clearly defines "must" and "when" with different behavior. > A server that does not implement the auto-delete aspects of when-stmt is > not compliant to the RFC. I don't agree with this. RFC 7950 says in sec. 8.1: The following properties are true in all data trees: ... o There MUST be no nodes tagged with "when" present if the "when" condition evaluates to "false" in the data tree. This can also be prevented if the server rejects an edit operation that wou= ld create such a situation. Lada > > >> Jason >> > > Andy > > >> >> >> *From:* netmod *On Behalf Of *Qin Wu >> *Sent:* Tuesday, September 10, 2019 10:33 PM >> *To:* Fengchong (frank) ; Andy Bierman < >> andy@yumaworks.com> >> *Cc:* netmod@ietf.org; Yangang >> *Subject:* [netmod] =E7=AD=94=E5=A4=8D: =E7=AD=94=E5=A4=8D: Please clari= fy implementation about =E2=80=98when=E2=80=99 >> >> >> >> Why processing order matter? My interpretation is both leaf node values >> (i.e.,leaf a, leaf b) should be validated together and commit as a whole, >> >> RFC6241 said: >> >> =E2=80=9C >> >> If the device is unable to commit all of the changes in the >> >> candidate configuration datastore, then the running >> >> configuration MUST remain unchanged. >> >> =E2=80=9D >> >> So validate the leaf node value in the edit-config request (message >> content validation) is not important, validate the leaf node value that = is >> applied to (datastore validation) is the key. >> >> >> >> I think what you want to raise is the server should hold on to send repl= y with an "unknown-element" in the during payload p= arsing phase and NETCONF >> >> Processing until all validation complete, otherwise it seems server will >> >> Send multiple rply with "unknown-element" in the = which seems not reasonable. >> >> >> >> -Qin >> >> *=E5=8F=91=E4=BB=B6=E4=BA=BA**:* netmod [mailto:netmod-bounces@ietf.org = ] >> *=E4=BB=A3=E8=A1=A8 *Fengchong (frank) >> *=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4**:* 2019=E5=B9=B49=E6=9C=8811=E6= =97=A5 9:29 >> *=E6=94=B6=E4=BB=B6=E4=BA=BA**:* Andy Bierman >> *=E6=8A=84=E9=80=81**:* netmod@ietf.org; Yangang >> *=E4=B8=BB=E9=A2=98**:* [netmod] =E7=AD=94=E5=A4=8D: Please clarify impl= ementation about =E2=80=98when=E2=80=99 >> >> >> >> Andy, >> >> >> >> Whether different result would occur according different process order? >> >> According 8.3.2 >> >> if server process =E2=80=98a=3D 3=E2=80=99 firstly, b will be deleted by= system and becomes >> a non-exist schema node, and then when =E2=80=98b=3D5=E2=80=99 is proce= ssed , server will >> report a =E2=80=98unknown-element=E2=80=99 error. >> >> But if server process =E2=80=98b=3D5=E2=80=99 firstly, it will be accept= ed by server, and >> then when =E2=80=98a=3D3=E2=80=99 is processed, b will be deleted by sys= tem, but report OK. >> >> >> >> If sec 8.3.2 is not right. What is the right? >> >> When node a and node b in the same request, and b tagged when condition, >> a=E2=80=99s value will cause b=E2=80=99s condition is evaluated to false= , which is more >> prior? >> >> According you and Rob=E2=80=99s interpretation , maybe node =E2=80=99a= =E2=80=99 is more prior? If >> yes, why node =E2=80=98b=E2=80=99 should be processed later? >> >> >> >> I think whether in edit-config processing phase the configuration tagged >> when should not be evaluated and be delayed to commit or validate? >> >> When commit or validate operation is issued, the data node tagged when >> will be evaluated, and if it=E2=80=99s evaluated to false, this data wil= l be >> deleted by system immediately, server should not report any error. >> >> >> >> >> ------------------------------ >> >> =E5=8D=8E=E4=B8=BA=E6=8A=80=E6=9C=AF=E6=9C=89=E9=99=90=E5=85=AC=E5=8F=B8= Huawei Technologies Co., Ltd. >> >> [image: Company_logo] >> >> =E4=B8=AA=E4=BA=BA=E7=AD=BE=E5=90=8D=EF=BC=9A=E5=86=AF=E5=86=B2 >> =E6=89=8B =E6=9C=BA=EF=BC=9A13776612983 >> =E7=94=B5=E5=AD=90=E9=82=AE=E4=BB=B6=EF=BC=9Afrank.fengchong@huawei.com >> =E5=85=AC=E5=8F=B8=E7=BD=91=E5=9D=80=EF=BC=9Awww.huawei.com >> ------------------------------ >> >> =EF=BB=BF =E6=9C=AC=E9=82=AE=E4=BB=B6=E5=8F=8A=E5=85=B6=E9=99=84=E4=BB= =B6=E5=90=AB=E6=9C=89=E5=8D=8E=E4=B8=BA=E5=85=AC=E5=8F=B8=E7=9A=84=E4=BF=9D= =E5=AF=86=E4=BF=A1=E6=81=AF=EF=BC=8C=E4=BB=85=E9=99=90=E4=BA=8E=E5=8F=91=E9= =80=81=E7=BB=99=E4=B8=8A=E9=9D=A2=E5=9C=B0=E5=9D=80=E4=B8=AD=E5=88=97=E5=87= =BA=E7=9A=84=E4=B8=AA=E4=BA=BA=E6=88=96=E7=BE=A4=E7=BB=84=E3=80=82=E7=A6=81 >> =E6=AD=A2=E4=BB=BB=E4=BD=95=E5=85=B6=E4=BB=96=E4=BA=BA=E4=BB=A5=E4=BB=BB= =E4=BD=95=E5=BD=A2=E5=BC=8F=E4=BD=BF=E7=94=A8=EF=BC=88=E5=8C=85=E6=8B=AC=E4= =BD=86=E4=B8=8D=E9=99=90=E4=BA=8E=E5=85=A8=E9=83=A8=E6=88=96=E9=83=A8=E5=88= =86=E5=9C=B0=E6=B3=84=E9=9C=B2=E3=80=81=E5=A4=8D=E5=88=B6=E3=80=81=E6=88=96= =E6=95=A3=E5=8F=91=EF=BC=89=E6=9C=AC=E9=82=AE=E4=BB=B6=E4=B8=AD >> =E7=9A=84=E4=BF=A1=E6=81=AF=E3=80=82=E5=A6=82=E6=9E=9C=E6=82=A8=E9=94=99= =E6=94=B6=E4=BA=86=E6=9C=AC=E9=82=AE=E4=BB=B6=EF=BC=8C=E8=AF=B7=E6=82=A8=E7= =AB=8B=E5=8D=B3=E7=94=B5=E8=AF=9D=E6=88=96=E9=82=AE=E4=BB=B6=E9=80=9A=E7=9F= =A5=E5=8F=91=E4=BB=B6=E4=BA=BA=E5=B9=B6=E5=88=A0=E9=99=A4=E6=9C=AC=E9=82=AE= =E4=BB=B6=EF=BC=81 >> This e-mail and its attachments contain confidential information from >> HUAWEI, which >> is intended only for the person or entity whose address is listed above. >> Any use of the >> information contained herein in any way (including, but not limited to, >> total or partial >> disclosure, reproduction, or dissemination) by persons other than the >> intended >> recipient(s) is prohibited. If you receive this e-mail in error, please >> notify the sender by >> phone or email immediately and delete it! >> >> >> >> *=E5=8F=91=E4=BB=B6=E4=BA=BA**:* Andy Bierman [mailto:andy@yumaworks.com= ] >> *=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4**:* 2019=E5=B9=B49=E6=9C=8810=E6= =97=A5 10:56 >> *=E6=94=B6=E4=BB=B6=E4=BA=BA**:* Fengchong (frank) >> *=E6=8A=84=E9=80=81**:* Rob Wilton (rwilton) ; netmod= @ietf.org; >> Yangang >> *=E4=B8=BB=E9=A2=98**:* Re: [netmod] Please clarify implementation about= =E2=80=98when=E2=80=99 >> >> >> >> >> >> >> >> On Mon, Sep 9, 2019 at 7:40 PM Fengchong (frank) < >> frank.fengchong@huawei.com> wrote: >> >> Andy, >> >> Whether all constraints on content in parameter will not be >> evaluated in payload parsing phase, for example, a leaf=E2=80=99s value = exceed >> range? >> >> Netconf server should treat it as a block data? >> >> >> >> >> >> Field validation and datastore validation are 2 different things. >> >> when-stmt processing is neither. It is by far the hardest part of an >> automated server to get right. >> >> >> >> Another question: >> >> >> >> In edit-config processing phase, whether constraints on content in >> parameter needs be evaluated? >> >> If yes, when configuration modification cause when condition is evaluat= ed >> to false, the node tagged when will be automatically deleted by system. >> >> Then, in scene 2, whether different result would occur according differe= nt >> process order? >> >> >> >> >> >> Since the parameter is anyxml, the YANG constraints defined on >> datastore contents >> >> are not enforced as part of RPC input validation. >> >> >> >> It would be nice if NETCONF defined behavior for providing data >> that will get deleted >> >> immediately by the server. We have a CLI parameter for this since some >> vendors want to >> >> treat this as an error and other just silently delete nodes. Note that >> when-stmt can silently >> >> delete existing nodes not included in the edit. (Lada does not agree this >> is how it should work, >> >> so we need yang-next to decide. Maybe NETCONF needs a --force parameter >> for this purpose.) >> >> >> >> >> >> Andy >> >> >> >> >> >> >> ------------------------------ >> >> =E5=8D=8E=E4=B8=BA=E6=8A=80=E6=9C=AF=E6=9C=89=E9=99=90=E5=85=AC=E5=8F=B8= Huawei Technologies Co., Ltd. >> >> [image: Company_logo] >> >> =E4=B8=AA=E4=BA=BA=E7=AD=BE=E5=90=8D=EF=BC=9A=E5=86=AF=E5=86=B2 >> =E6=89=8B =E6=9C=BA=EF=BC=9A13776612983 >> =E7=94=B5=E5=AD=90=E9=82=AE=E4=BB=B6=EF=BC=9Afrank.fengchong@huawei.com >> =E5=85=AC=E5=8F=B8=E7=BD=91=E5=9D=80=EF=BC=9Awww.huawei.com >> ------------------------------ >> >> =EF=BB=BF =E6=9C=AC=E9=82=AE=E4=BB=B6=E5=8F=8A=E5=85=B6=E9=99=84=E4=BB= =B6=E5=90=AB=E6=9C=89=E5=8D=8E=E4=B8=BA=E5=85=AC=E5=8F=B8=E7=9A=84=E4=BF=9D= =E5=AF=86=E4=BF=A1=E6=81=AF=EF=BC=8C=E4=BB=85=E9=99=90=E4=BA=8E=E5=8F=91=E9= =80=81=E7=BB=99=E4=B8=8A=E9=9D=A2=E5=9C=B0=E5=9D=80=E4=B8=AD=E5=88=97=E5=87= =BA=E7=9A=84=E4=B8=AA=E4=BA=BA=E6=88=96=E7=BE=A4=E7=BB=84=E3=80=82=E7=A6=81 >> =E6=AD=A2=E4=BB=BB=E4=BD=95=E5=85=B6=E4=BB=96=E4=BA=BA=E4=BB=A5=E4=BB=BB= =E4=BD=95=E5=BD=A2=E5=BC=8F=E4=BD=BF=E7=94=A8=EF=BC=88=E5=8C=85=E6=8B=AC=E4= =BD=86=E4=B8=8D=E9=99=90=E4=BA=8E=E5=85=A8=E9=83=A8=E6=88=96=E9=83=A8=E5=88= =86=E5=9C=B0=E6=B3=84=E9=9C=B2=E3=80=81=E5=A4=8D=E5=88=B6=E3=80=81=E6=88=96= =E6=95=A3=E5=8F=91=EF=BC=89=E6=9C=AC=E9=82=AE=E4=BB=B6=E4=B8=AD >> =E7=9A=84=E4=BF=A1=E6=81=AF=E3=80=82=E5=A6=82=E6=9E=9C=E6=82=A8=E9=94=99= =E6=94=B6=E4=BA=86=E6=9C=AC=E9=82=AE=E4=BB=B6=EF=BC=8C=E8=AF=B7=E6=82=A8=E7= =AB=8B=E5=8D=B3=E7=94=B5=E8=AF=9D=E6=88=96=E9=82=AE=E4=BB=B6=E9=80=9A=E7=9F= =A5=E5=8F=91=E4=BB=B6=E4=BA=BA=E5=B9=B6=E5=88=A0=E9=99=A4=E6=9C=AC=E9=82=AE= =E4=BB=B6=EF=BC=81 >> This e-mail and its attachments contain confidential information from >> HUAWEI, which >> is intended only for the person or entity whose address is listed above. >> Any use of the >> information contained herein in any way (including, but not limited to, >> total or partial >> disclosure, reproduction, or dissemination) by persons other than the >> intended >> recipient(s) is prohibited. If you receive this e-mail in error, please >> notify the sender by >> phone or email immediately and delete it! >> >> >> >> *=E5=8F=91=E4=BB=B6=E4=BA=BA**:* Andy Bierman [mailto:andy@yumaworks.com] >> *=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4**:* 2019=E5=B9=B49=E6=9C=8810=E6= =97=A5 10:19 >> *=E6=94=B6=E4=BB=B6=E4=BA=BA**:* Fengchong (frank) >> *=E6=8A=84=E9=80=81**:* Rob Wilton (rwilton) ; netmod= @ietf.org; >> Yangang >> *=E4=B8=BB=E9=A2=98**:* Re: [netmod] Please clarify implementation about= =E2=80=98when=E2=80=99 >> >> >> >> >> >> >> >> On Mon, Sep 9, 2019 at 7:10 PM Fengchong (frank) < >> frank.fengchong@huawei.com> wrote: >> >> Hi andy, >> >> >> >> You only talk about the constraints on rpc operation=E2=80=99s parameter? >> >> >> >> Do you have any opinion about my question? >> >> >> >> 8.3.1 does not apply to leaf 'b'. >> >> The RPC parameter is called 'config'. >> >> It has no when-stmts to evaluate. >> >> Rob is correct. >> >> His example shows what 8.3.1 would cover. >> >> >> >> Andy >> >> >> >> >> >> >> ------------------------------ >> >> =E5=8D=8E=E4=B8=BA=E6=8A=80=E6=9C=AF=E6=9C=89=E9=99=90=E5=85=AC=E5=8F=B8= Huawei Technologies Co., Ltd. >> >> [image: Company_logo] >> >> =E4=B8=AA=E4=BA=BA=E7=AD=BE=E5=90=8D=EF=BC=9A=E5=86=AF=E5=86=B2 >> =E6=89=8B =E6=9C=BA=EF=BC=9A13776612983 >> =E7=94=B5=E5=AD=90=E9=82=AE=E4=BB=B6=EF=BC=9Afrank.fengchong@huawei.com >> =E5=85=AC=E5=8F=B8=E7=BD=91=E5=9D=80=EF=BC=9Awww.huawei.com >> ------------------------------ >> >> =EF=BB=BF =E6=9C=AC=E9=82=AE=E4=BB=B6=E5=8F=8A=E5=85=B6=E9=99=84=E4=BB= =B6=E5=90=AB=E6=9C=89=E5=8D=8E=E4=B8=BA=E5=85=AC=E5=8F=B8=E7=9A=84=E4=BF=9D= =E5=AF=86=E4=BF=A1=E6=81=AF=EF=BC=8C=E4=BB=85=E9=99=90=E4=BA=8E=E5=8F=91=E9= =80=81=E7=BB=99=E4=B8=8A=E9=9D=A2=E5=9C=B0=E5=9D=80=E4=B8=AD=E5=88=97=E5=87= =BA=E7=9A=84=E4=B8=AA=E4=BA=BA=E6=88=96=E7=BE=A4=E7=BB=84=E3=80=82=E7=A6=81 >> =E6=AD=A2=E4=BB=BB=E4=BD=95=E5=85=B6=E4=BB=96=E4=BA=BA=E4=BB=A5=E4=BB=BB= =E4=BD=95=E5=BD=A2=E5=BC=8F=E4=BD=BF=E7=94=A8=EF=BC=88=E5=8C=85=E6=8B=AC=E4= =BD=86=E4=B8=8D=E9=99=90=E4=BA=8E=E5=85=A8=E9=83=A8=E6=88=96=E9=83=A8=E5=88= =86=E5=9C=B0=E6=B3=84=E9=9C=B2=E3=80=81=E5=A4=8D=E5=88=B6=E3=80=81=E6=88=96= =E6=95=A3=E5=8F=91=EF=BC=89=E6=9C=AC=E9=82=AE=E4=BB=B6=E4=B8=AD >> =E7=9A=84=E4=BF=A1=E6=81=AF=E3=80=82=E5=A6=82=E6=9E=9C=E6=82=A8=E9=94=99= =E6=94=B6=E4=BA=86=E6=9C=AC=E9=82=AE=E4=BB=B6=EF=BC=8C=E8=AF=B7=E6=82=A8=E7= =AB=8B=E5=8D=B3=E7=94=B5=E8=AF=9D=E6=88=96=E9=82=AE=E4=BB=B6=E9=80=9A=E7=9F= =A5=E5=8F=91=E4=BB=B6=E4=BA=BA=E5=B9=B6=E5=88=A0=E9=99=A4=E6=9C=AC=E9=82=AE= =E4=BB=B6=EF=BC=81 >> This e-mail and its attachments contain confidential information from >> HUAWEI, which >> is intended only for the person or entity whose address is listed above. >> Any use of the >> information contained herein in any way (including, but not limited to, >> total or partial >> disclosure, reproduction, or dissemination) by persons other than the >> intended >> recipient(s) is prohibited. If you receive this e-mail in error, please >> notify the sender by >> phone or email immediately and delete it! >> >> >> >> *=E5=8F=91=E4=BB=B6=E4=BA=BA**:* Andy Bierman [mailto:andy@yumaworks.com] >> *=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4**:* 2019=E5=B9=B49=E6=9C=8810=E6= =97=A5 1:14 >> *=E6=94=B6=E4=BB=B6=E4=BA=BA**:* Rob Wilton (rwilton) >> *=E6=8A=84=E9=80=81**:* Fengchong (frank) ; = netmod@ietf.org; >> Yangang >> *=E4=B8=BB=E9=A2=98**:* Re: [netmod] Please clarify implementation about= =E2=80=98when=E2=80=99 >> >> >> >> Hi, >> >> >> >> None of the operations that accept or return datastore contents expose t= he >> datastore objects >> >> in the RPC parameters. They are always anyxml or anydata. This means th= at >> >> there are no descendant data nodes defined at all according to the RPC >> operation >> >> and therefore the constraints on those nodes do not exist in the RPC >> operation either. >> >> >> >> >> >> >> >> On Mon, Sep 9, 2019 at 6:41 AM Rob Wilton (rwilton) >> wrote: >> >> Hi Frank, >> >> >> >> My interpretation of what the expected behaviour is as follows. >> >> >> >> For =E2=80=9Cscene 1=E2=80=9D, the config change is accepted because the= result of the >> config datastore after the edit-config has been applied is valid. >> >> >> >> For =E2=80=9Cscene 2=E2=80=9D, the config change is rejected because the= result of the >> config datastore after the edit-config has been applied is invalid. >> >> >> >> My interpretation is that the block of text in 8.3.1 payload parsing is >> primary intended to refer to RFC input. E.g. if the RPC was defined >> something like below, then the =E2=80=98when=E2=80=99 rule in 8.3.1 woul= d enforce that a >> zip-code can only be provided if the country is the USA. >> >> >> >> rpc rock-the-house { >> >> input { >> >> leaf country { >> >> type string; >> >> } >> >> leaf zip-code { >> >> when =E2=80=9C../country =3D =E2=80=98usa=E2=80=99=E2=80=9D; >> >> type string; >> >> } >> >> } >> >> } >> >> >> >> Thanks, >> >> Rob >> >> >> >> >> >> >> >> *From:* netmod *On Behalf Of *Fengchong (frank) >> *Sent:* 06 September 2019 08:19 >> *To:* netmod@ietf.org >> *Cc:* Yangang >> *Subject:* [netmod] Please clarify implementation about =E2=80=98when=E2= =80=99 >> >> >> >> Hi all, >> >> >> >> In RFC7950 secton 8, several description about when=EF=BC=9A >> In section 8.2 . >> Configuration Data Modifications >> >> o If a request modifies a configuration data node such that any >> >> node's "when" expression becomes false, then the node in the data >> >> tree with the "when" expression is deleted by the server. >> In 8.3.1 . Payload >> Parsing >> >> o If data for a node tagged with "when" is present and the "when" >> >> condition evaluates to "false", the server MUST reply with an >> >> "unknown-element" in the . >> >> In 8.3.2 . NETCONF >> Processing >> >> Modification requests for nodes tagged with "when", and the "when" >> >> condition evaluates to "false". In this case, the server MUST >> >> reply with an "unknown-element" in the . >> >> >> >> YANG module=EF=BC=9A >> >> module foo { >> >> namespace =E2=80=9Chttp://foo.com=E2=80=9D; >> >> prefix =E2=80=9Cfoo=E2=80=9D; >> >> Leaf a {=E2=80=A6} >> >> Leaf b { >> >> When =E2=80=9Ca =3D 10=E2=80=9D; >> >> } >> >> } >> Scene 1: >> >> The first edit-config request: >> >> >> >> >> >> >> >> >> >> >> >> 3 >> >> >> >> >> >> This request will set a =3D 3. >> >> >> >> The second request: >> >> >> >> >> >> >> >> >> >> >> >> 10 >> >> 5 >> >> >> >> >> >> >> >> According 8.3.1, in rpc payload parsing phase, the a=E2=80=99s value in = candidate >> datastore is 3,so leaf b=E2=80=99s when condition is evaluated to false,= server >> will report =E2=80=98unknown-element=E2=80=99 error. >> >> Is it expected by user? >> Scene 2: >> >> The first edit-config request: >> >> >> >> >> >> >> >> >> >> >> >> 10 >> >> >> >> >> >> This request will set a =3D 10. >> >> >> >> The second request: >> >> >> >> >> >> >> >> >> >> >> >> 3 >> >> 5 >> >> >> >> >> >> According 8.3.1, in rpc payload parsing phase, the a=E2=80=99s value in = candidate >> datastore is 10, so leaf b=E2=80=99s when condition is evaluated to true= , server >> will accept this request in payload parsing phase. >> >> >> >> In edit-config request processing phase, if leaf a=E2=80=99s modificatio= n is >> processed firstly, the a=E2=80=99s value will be changed to 3, so the b= =E2=80=99s when >> condition will be false, when server process b=E2=80=99s modification, b= will be >> treated as unknown-element, the edit-config request will fail. >> >> If leaf b=E2=80=99s modification is processed firstly, server will accep= t this >> modification ,because b=E2=80=99s when condition is true, and when serve= r process >> a=E2=80=99s modification , this modification will be accepted, and b=E2= =80=99s when >> condition will be evaluated to false, leaf b will be deleted automatical= ly, >> the edit-config request will be OK. >> >> >> >> How server should process this situation? >> >> >> >> _______________________________________________ >> netmod mailing list >> netmod@ietf.org >> https://www.ietf.org/mailman/listinfo/netmod >> >> > _______________________________________________ > netmod mailing list > netmod@ietf.org > https://www.ietf.org/mailman/listinfo/netmod --=20 Ladislav Lhotka=20 Head, CZ.NIC Labs PGP Key ID: 0xB8F92B08A9F76C67 From nobody Wed Sep 25 23:57:16 2019 Return-Path: X-Original-To: netmod@ietfa.amsl.com Delivered-To: netmod@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 269951200F6 for ; Wed, 25 Sep 2019 23:57:15 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.899 X-Spam-Level: X-Spam-Status: No, score=-1.899 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id rCcFXoPGqNHe for ; Wed, 25 Sep 2019 23:57:11 -0700 (PDT) Received: from mail.tail-f.com (mail.tail-f.com [46.21.102.45]) by ietfa.amsl.com (Postfix) with ESMTP id 4D823120815 for ; Wed, 25 Sep 2019 23:57:11 -0700 (PDT) Received: from localhost (unknown [173.38.220.41]) by mail.tail-f.com (Postfix) with ESMTPSA id 24A731AE018A; Thu, 26 Sep 2019 08:57:09 +0200 (CEST) Date: Thu, 26 Sep 2019 08:56:44 +0200 (CEST) Message-Id: <20190926.085644.1268671875357328723.mbj@tail-f.com> To: lhotka@nic.cz Cc: andy@yumaworks.com, jason.sterne@nokia.com, netmod@ietf.org, yangang@huawei.com From: Martin Bjorklund In-Reply-To: <87h84z4kmw.fsf@nic.cz> References: <87h84z4kmw.fsf@nic.cz> X-Mailer: Mew version 6.7 on Emacs 25.2 / Mule 6.0 (HANACHIRUSATO) Mime-Version: 1.0 Content-Type: Text/Plain; charset=utf-8 Content-Transfer-Encoding: base64 Archived-At: Subject: Re: [netmod] =?utf-8?b?562U5aSNOiDnrZTlpI06IFBsZWFzZSBjbGFyaWZ5IGlt?= 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NO X-Spam-Score: -1.897 X-Spam-Level: X-Spam-Status: No, score=-1.897 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, SPF_HELO_NONE=0.001, SPF_NONE=0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id k_OiPx0HVz7I for ; Thu, 26 Sep 2019 00:02:44 -0700 (PDT) Received: from trail.lhotka.name (trail.lhotka.name [77.48.224.143]) by ietfa.amsl.com (Postfix) with ESMTP id 4710512004C for ; Thu, 26 Sep 2019 00:02:44 -0700 (PDT) Received: by trail.lhotka.name (Postfix, from userid 109) id 30FDA1821292; Thu, 26 Sep 2019 09:04:17 +0200 (CEST) Received: from localhost (nat-1.nic.cz [217.31.205.1]) by trail.lhotka.name (Postfix) with ESMTPSA id 1DB871821290; Thu, 26 Sep 2019 09:04:16 +0200 (CEST) From: Ladislav Lhotka To: "Sterne\, Jason \(Nokia - CA\/Ottawa\)" , "netmod\@ietf.org" In-Reply-To: References: Mail-Followup-To: "Sterne\, Jason \(Nokia - CA\/Ottawa\)" , "netmod\@ietf.org" Date: Thu, 26 Sep 2019 09:02:42 +0200 Message-ID: <87ef034k19.fsf@nic.cz> MIME-Version: 1.0 Content-Type: text/plain Archived-At: Subject: Re: [netmod] evaluating 'when' statements with unconfigured leafs X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 26 Sep 2019 07:02:46 -0000 "Sterne, Jason (Nokia - CA/Ottawa)" writes: > Hi all, > > I saw some recent questions about 'when' statements. I had another one related to evaluating 'when' statements that involve leafs that don't currently have a value at all. > > leaf foo { > type enumeration { > enum val1; > enum val2; > } > } > > leaf bar { > when "../foo != 'val2'"; > type uint8; > } > > Notice that foo does not have a default statement. So if no manager has set leaf foo, it doesn't exist in the config. > > In that case, does the "when" statement evaluate to 'true' (i.e. leaf bar is allowed to have a value) ? > > i.e. assuming leaf foo is not set at all, is this accepted? > 23 > > Or is there something special here because of the non-existence of leaf foo? > > If the "when" evaluates to 'false', then does the following "when" evaluate differently than the one above? > when "not(../foo = 'val2')"; Indeed it does. If the "foo" instance doesn't exist, then this expression evaluates to true. Lada > > Jason > _______________________________________________ > netmod mailing list > netmod@ietf.org > https://www.ietf.org/mailman/listinfo/netmod -- Ladislav Lhotka Head, CZ.NIC Labs PGP Key ID: 0xB8F92B08A9F76C67 From nobody Thu Sep 26 00:09:06 2019 Return-Path: X-Original-To: netmod@ietfa.amsl.com Delivered-To: netmod@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 29AEF1200F6 for ; Thu, 26 Sep 2019 00:09:05 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -6.997 X-Spam-Level: X-Spam-Status: No, score=-6.997 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_HI=-5, SPF_HELO_NONE=0.001, SPF_NONE=0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1024-bit key) header.d=nic.cz Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id qQ5Bw4muXiT6 for ; Thu, 26 Sep 2019 00:09:01 -0700 (PDT) Received: from mail.nic.cz (mail.nic.cz [217.31.204.67]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 093A412004C for ; Thu, 26 Sep 2019 00:09:01 -0700 (PDT) Received: from birdie (unknown [IPv6:2001:1488:fffe:6:a744:2697:a0ec:a420]) by mail.nic.cz (Postfix) with ESMTPSA id F1857140C3D; Thu, 26 Sep 2019 09:08:57 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=nic.cz; s=default; t=1569481738; bh=BbrWvJpcU5+LpKDdRr8CxyCWOGDeGfMEn/Om6XNC1VA=; h=From:To:Date; b=jMwDGdIA8pzikMoNJie/mSABQTfaoHirsXsJHUJJhvYsR7dC01m0hSCJ11jBWl+Sw BOVxTXqMuwIq2eCsrFnjUhUHCxd5mU/++uYtOUdkAWyJZ7UUnKa7u472Zf0TIc/Vfg vrR8xV/nKcL1HFSWExisHe3nP+323+08I8NzvHqI= Message-ID: <9bc06f9f3f1c87c79ccce4e1c4d40755c804875a.camel@nic.cz> From: Ladislav Lhotka To: Martin Bjorklund Cc: andy@yumaworks.com, jason.sterne@nokia.com, netmod@ietf.org, yangang@huawei.com Date: Thu, 26 Sep 2019 09:08:56 +0200 In-Reply-To: <20190926.085644.1268671875357328723.mbj@tail-f.com> References: <87h84z4kmw.fsf@nic.cz> <20190926.085644.1268671875357328723.mbj@tail-f.com> Organization: CZ.NIC Content-Type: text/plain; charset="UTF-8" User-Agent: Evolution 3.34.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Virus-Scanned: clamav-milter 0.100.3 at mail.nic.cz X-Virus-Status: Clean Archived-At: Subject: Re: [netmod] =?utf-8?b?562U5aSNOiDnrZTlpI06IFBsZWFzZSBjbGFyaWZ5IGlt?= =?utf-8?b?cGxlbWVudGF0aW9uIGFib3V0IOKAmHdoZW7igJk=?= X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 26 Sep 2019 07:09:05 -0000 On Thu, 2019-09-26 at 08:56 +0200, Martin Bjorklund wrote: > Ladislav Lhotka wrote: > > Andy Bierman writes: > > > > > > > On Wed, Sep 25, 2019 at 8:44 AM Sterne, Jason (Nokia - CA/Ottawa) < > > > > jason.sterne@nokia.com> wrote: > > > > > > > >> Processing order should not matter. The evaluation of the 'when' > statement > > > >> should be done assuming an atomic application of the edit-config. > > > >> > > > >> > > > >> > > > >> I agree that a standards compliant server should do as Rob said: > > > >> > > > >> > > > >> > > > >> - For “scene 1”, the config change is accepted because the result of the > > > >> config datastore after the edit-config has been applied is valid. > > > >> > > > >> - For “scene 2”, the config change is rejected because the result of the > > > >> config datastore after the edit-config has been applied is invalid. > > > >> > > > >> > > > >> > > > >> From an implementation that may indeed mean processing the 'when' after a > > > >> first pass that sets the various leafs to tentative values. But that's > > > >> implementation detail. > > > >> > > > >> > > > >> > > > >> IMO the auto-clearing behavior of 'when' may be complicated but that is > > > >> how it is defined (same with 'choice'). Clients can and should depend on > > > >> things being automatically deleted. If you want validation errors (i.e. > > > >> force the client to clear all the dependant leafs instead of auto- > clearing) > > > >> then use a 'must' statement. > > > >> > > > >> > > > >> > > > > > > > > +1 > > > > > > > > YANG clearly defines "must" and "when" with different behavior. > > > > A server that does not implement the auto-delete aspects of when-stmt is > > > > not compliant to the RFC. > > > > > > I don't agree with this. RFC 7950 says in sec. 8.1: > > > > > > The following properties are true in all data trees: > > > > > > ... > > > > > > o There MUST be no nodes tagged with "when" present if the "when" > > > condition evaluates to "false" in the data tree. > > > It also says in 8.2: > > o If a request modifies a configuration data node such that any > node's "when" expression becomes false, then the node in the data > tree with the "when" expression is deleted by the server. Right. But the request won't modify a configuration data node because it is rejected. So the premise of the above implication doesn't hold, and the conclusion doesn't apply. Lada > > > /martin > > > > > > This can also be prevented if the server rejects an edit operation > > > that would create such a situation. > > > > > > Lada > > > > > > > > > > > > > > > > > >> Jason > > > >> > > > > > > > > Andy > > > > > > > > > > > >> > > > >> > > > >> *From:* netmod *On Behalf Of *Qin Wu > > > >> *Sent:* Tuesday, September 10, 2019 10:33 PM > > > >> *To:* Fengchong (frank) ; Andy Bierman < > > > >> andy@yumaworks.com> > > > >> *Cc:* netmod@ietf.org; Yangang > > > >> *Subject:* [netmod] 答复: 答复: Please clarify implementation about ‘when’ > > > >> > > > >> > > > >> > > > >> Why processing order matter? My interpretation is both leaf node values > > > >> (i.e.,leaf a, leaf b) should be validated together and commit as a whole, > > > >> > > > >> RFC6241 said: > > > >> > > > >> “ > > > >> > > > >> If the device is unable to commit all of the changes in the > > > >> > > > >> candidate configuration datastore, then the running > > > >> > > > >> configuration MUST remain unchanged. > > > >> > > > >> ” > > > >> > > > >> So validate the leaf node value in the edit-config request (message > > > >> content validation) is not important, validate the leaf node value that > is > > > >> applied to (datastore validation) is the key. > > > >> > > > >> > > > >> > > > >> I think what you want to raise is the server should hold on to send reply > with an "unknown-element" in the during payload > parsing phase and NETCONF > > > >> > > > >> Processing until all validation complete, otherwise it seems server will > > > >> > > > >> Send multiple rply with "unknown-element" in the > which seems not reasonable. > > > >> > > > >> > > > >> > > > >> -Qin > > > >> > > > >> *发件人**:* netmod [mailto:netmod-bounces@ietf.org > ] > > > >> *代表 *Fengchong (frank) > > > >> *发送时间**:* 2019年9月11日 9:29 > > > >> *收件人**:* Andy Bierman > > > >> *抄送**:* netmod@ietf.org; Yangang > > > >> *主题**:* [netmod] 答复: Please clarify implementation about ‘when’ > > > >> > > > >> > > > >> > > > >> Andy, > > > >> > > > >> > > > >> > > > >> Whether different result would occur according different process order? > > > >> > > > >> According 8.3.2 > > > >> > > > >> if server process ‘a= 3’ firstly, b will be deleted by system and becomes > > > >> a non-exist schema node, and then when ‘b=5’ is processed , server will > > > >> report a ‘unknown-element’ error. > > > >> > > > >> But if server process ‘b=5’ firstly, it will be accepted by server, and > > > >> then when ‘a=3’ is processed, b will be deleted by system, but report OK. > > > >> > > > >> > > > >> > > > >> If sec 8.3.2 is not right. What is the right? > > > >> > > > >> When node a and node b in the same request, and b tagged when condition, > > > >> a’s value will cause b’s condition is evaluated to false, which is more > > > >> prior? > > > >> > > > >> According you and Rob’s interpretation , maybe node ’a’ is more prior? If > > > >> yes, why node ‘b’ should be processed later? > > > >> > > > >> > > > >> > > > >> I think whether in edit-config processing phase the configuration tagged > > > >> when should not be evaluated and be delayed to commit or validate? > > > >> > > > >> When commit or validate operation is issued, the data node tagged when > > > >> will be evaluated, and if it’s evaluated to false, this data will be > > > >> deleted by system immediately, server should not report any error. > > > >> > > > >> > > > >> > > > >> > > > >> ------------------------------ > > > >> > > > >> 华为技术有限公司 Huawei Technologies Co., Ltd. > > > >> > > > >> [image: Company_logo] > > > >> > > > >> 个人签名：冯冲 > > > >> 手 机：13776612983 > > > >> 电子邮件：frank.fengchong@huawei.com > > > >> 公司网址：www.huawei.com > > > >> ------------------------------ > > > >> > > > >>  本邮件及其附件含有华为公司的保密信息，仅限于发送给上面地址中列出的个人或群组。禁 > > > >> 止任何其他人以任何形式使用（包括但不限于全部或部分地泄露、复制、或散发）本邮件中 > > > >> 的信息。如果您错收了本邮件，请您立即电话或邮件通知发件人并删除本邮件！ > > > >> This e-mail and its attachments contain confidential information from > > > >> HUAWEI, which > > > >> is intended only for the person or entity whose address is listed above. > > > >> Any use of the > > > >> information contained herein in any way (including, but not limited to, > > > >> total or partial > > > >> disclosure, reproduction, or dissemination) by persons other than the > > > >> intended > > > >> recipient(s) is prohibited. If you receive this e-mail in error, please > > > >> notify the sender by > > > >> phone or email immediately and delete it! > > > >> > > > >> > > > >> > > > >> *发件人**:* Andy Bierman [mailto:andy@yumaworks.com ] > > > >> *发送时间**:* 2019年9月10日 10:56 > > > >> *收件人**:* Fengchong (frank) > > > >> *抄送**:* Rob Wilton (rwilton) ; netmod@ietf.org; > > > >> Yangang > > > >> *主题**:* Re: [netmod] Please clarify implementation about ‘when’ > > > >> > > > >> > > > >> > > > >> > > > >> > > > >> > > > >> > > > >> On Mon, Sep 9, 2019 at 7:40 PM Fengchong (frank) < > > > >> frank.fengchong@huawei.com> wrote: > > > >> > > > >> Andy, > > > >> > > > >> Whether all constraints on content in parameter will not be > > > >> evaluated in payload parsing phase, for example, a leaf’s value exceed > > > >> range? > > > >> > > > >> Netconf server should treat it as a block data? > > > >> > > > >> > > > >> > > > >> > > > >> > > > >> Field validation and datastore validation are 2 different things. > > > >> > > > >> when-stmt processing is neither. It is by far the hardest part of an > > > >> automated server to get right. > > > >> > > > >> > > > >> > > > >> Another question: > > > >> > > > >> > > > >> > > > >> In edit-config processing phase, whether constraints on content in > > > >> parameter needs be evaluated? > > > >> > > > >> If yes, when configuration modification cause when condition is > evaluated > > > >> to false, the node tagged when will be automatically deleted by system. > > > >> > > > >> Then, in scene 2, whether different result would occur according > different > > > >> process order? > > > >> > > > >> > > > >> > > > >> > > > >> > > > >> Since the parameter is anyxml, the YANG constraints defined on > > > >> datastore contents > > > >> > > > >> are not enforced as part of RPC input validation. > > > >> > > > >> > > > >> > > > >> It would be nice if NETCONF defined behavior for providing data > > > >> that will get deleted > > > >> > > > >> immediately by the server. We have a CLI parameter for this since some > > > >> vendors want to > > > >> > > > >> treat this as an error and other just silently delete nodes. Note that > > > >> when-stmt can silently > > > >> > > > >> delete existing nodes not included in the edit. (Lada does not agree this > > > >> is how it should work, > > > >> > > > >> so we need yang-next to decide. Maybe NETCONF needs a --force parameter > > > >> for this purpose.) > > > >> > > > >> > > > >> > > > >> > > > >> > > > >> Andy > > > >> > > > >> > > > >> > > > >> > > > >> > > > >> > > > >> ------------------------------ > > > >> > > > >> 华为技术有限公司 Huawei Technologies Co., Ltd. > > > >> > > > >> [image: Company_logo] > > > >> > > > >> 个人签名：冯冲 > > > >> 手 机：13776612983 > > > >> 电子邮件：frank.fengchong@huawei.com > > > >> 公司网址：www.huawei.com > > > >> ------------------------------ > > > >> > > > >>  本邮件及其附件含有华为公司的保密信息，仅限于发送给上面地址中列出的个人或群组。禁 > > > >> 止任何其他人以任何形式使用（包括但不限于全部或部分地泄露、复制、或散发）本邮件中 > > > >> 的信息。如果您错收了本邮件，请您立即电话或邮件通知发件人并删除本邮件！ > > > >> This e-mail and its attachments contain confidential information from > > > >> HUAWEI, which > > > >> is intended only for the person or entity whose address is listed above. > > > >> Any use of the > > > >> information contained herein in any way (including, but not limited to, > > > >> total or partial > > > >> disclosure, reproduction, or dissemination) by persons other than the > > > >> intended > > > >> recipient(s) is prohibited. If you receive this e-mail in error, please > > > >> notify the sender by > > > >> phone or email immediately and delete it! > > > >> > > > >> > > > >> > > > >> *发件人**:* Andy Bierman [mailto:andy@yumaworks.com] > > > >> *发送时间**:* 2019年9月10日 10:19 > > > >> *收件人**:* Fengchong (frank) > > > >> *抄送**:* Rob Wilton (rwilton) ; netmod@ietf.org; > > > >> Yangang > > > >> *主题**:* Re: [netmod] Please clarify implementation about ‘when’ > > > >> > > > >> > > > >> > > > >> > > > >> > > > >> > > > >> > > > >> On Mon, Sep 9, 2019 at 7:10 PM Fengchong (frank) < > > > >> frank.fengchong@huawei.com> wrote: > > > >> > > > >> Hi andy, > > > >> > > > >> > > > >> > > > >> You only talk about the constraints on rpc operation’s parameter? > > > >> > > > >> > > > >> > > > >> Do you have any opinion about my question? > > > >> > > > >> > > > >> > > > >> 8.3.1 does not apply to leaf 'b'. > > > >> > > > >> The RPC parameter is called 'config'. > > > >> > > > >> It has no when-stmts to evaluate. > > > >> > > > >> Rob is correct. > > > >> > > > >> His example shows what 8.3.1 would cover. > > > >> > > > >> > > > >> > > > >> Andy > > > >> > > > >> > > > >> > > > >> > > > >> > > > >> > > > >> ------------------------------ > > > >> > > > >> 华为技术有限公司 Huawei Technologies Co., Ltd. > > > >> > > > >> [image: Company_logo] > > > >> > > > >> 个人签名：冯冲 > > > >> 手 机：13776612983 > > > >> 电子邮件：frank.fengchong@huawei.com > > > >> 公司网址：www.huawei.com > > > >> ------------------------------ > > > >> > > > >>  本邮件及其附件含有华为公司的保密信息，仅限于发送给上面地址中列出的个人或群组。禁 > > > >> 止任何其他人以任何形式使用（包括但不限于全部或部分地泄露、复制、或散发）本邮件中 > > > >> 的信息。如果您错收了本邮件，请您立即电话或邮件通知发件人并删除本邮件！ > > > >> This e-mail and its attachments contain confidential information from > > > >> HUAWEI, which > > > >> is intended only for the person or entity whose address is listed above. > > > >> Any use of the > > > >> information contained herein in any way (including, but not limited to, > > > >> total or partial > > > >> disclosure, reproduction, or dissemination) by persons other than the > > > >> intended > > > >> recipient(s) is prohibited. If you receive this e-mail in error, please > > > >> notify the sender by > > > >> phone or email immediately and delete it! > > > >> > > > >> > > > >> > > > >> *发件人**:* Andy Bierman [mailto:andy@yumaworks.com] > > > >> *发送时间**:* 2019年9月10日 1:14 > > > >> *收件人**:* Rob Wilton (rwilton) > > > >> *抄送**:* Fengchong (frank) ; netmod@ietf.org; > > > >> Yangang > > > >> *主题**:* Re: [netmod] Please clarify implementation about ‘when’ > > > >> > > > >> > > > >> > > > >> Hi, > > > >> > > > >> > > > >> > > > >> None of the operations that accept or return datastore contents expose > the > > > >> datastore objects > > > >> > > > >> in the RPC parameters. They are always anyxml or anydata. This means > that > > > >> > > > >> there are no descendant data nodes defined at all according to the RPC > > > >> operation > > > >> > > > >> and therefore the constraints on those nodes do not exist in the RPC > > > >> operation either. > > > >> > > > >> > > > >> > > > >> > > > >> > > > >> > > > >> > > > >> On Mon, Sep 9, 2019 at 6:41 AM Rob Wilton (rwilton) > > > >> wrote: > > > >> > > > >> Hi Frank, > > > >> > > > >> > > > >> > > > >> My interpretation of what the expected behaviour is as follows. > > > >> > > > >> > > > >> > > > >> For “scene 1”, the config change is accepted because the result of the > > > >> config datastore after the edit-config has been applied is valid. > > > >> > > > >> > > > >> > > > >> For “scene 2”, the config change is rejected because the result of the > > > >> config datastore after the edit-config has been applied is invalid. > > > >> > > > >> > > > >> > > > >> My interpretation is that the block of text in 8.3.1 payload parsing is > > > >> primary intended to refer to RFC input. E.g. if the RPC was defined > > > >> something like below, then the ‘when’ rule in 8.3.1 would enforce that a > > > >> zip-code can only be provided if the country is the USA. > > > >> > > > >> > > > >> > > > >> rpc rock-the-house { > > > >> > > > >> input { > > > >> > > > >> leaf country { > > > >> > > > >> type string; > > > >> > > > >> } > > > >> > > > >> leaf zip-code { > > > >> > > > >> when “../country = ‘usa’”; > > > >> > > > >> type string; > > > >> > > > >> } > > > >> > > > >> } > > > >> > > > >> } > > > >> > > > >> > > > >> > > > >> Thanks, > > > >> > > > >> Rob > > > >> > > > >> > > > >> > > > >> > > > >> > > > >> > > > >> > > > >> *From:* netmod *On Behalf Of *Fengchong (frank) > > > >> *Sent:* 06 September 2019 08:19 > > > >> *To:* netmod@ietf.org > > > >> *Cc:* Yangang > > > >> *Subject:* [netmod] Please clarify implementation about ‘when’ > > > >> > > > >> > > > >> > > > >> Hi all, > > > >> > > > >> > > > >> > > > >> In RFC7950 secton 8, several description about when： > > > >> In section 8.2 ;. > > > >> Configuration Data Modifications > > > >> > > > >> o If a request modifies a configuration data node such that any > > > >> > > > >> node's "when" expression becomes false, then the node in the data > > > >> > > > >> tree with the "when" expression is deleted by the server. > > > >> In 8.3.1 ;. Payload > > > >> Parsing > > > >> > > > >> o If data for a node tagged with "when" is present and the "when" > > > >> > > > >> condition evaluates to "false", the server MUST reply with an > > > >> > > > >> "unknown-element" in the . > > > >> > > > >> In 8.3.2 ;. NETCONF > > > >> Processing > > > >> > > > >> Modification requests for nodes tagged with "when", and the "when" > > > >> > > > >> condition evaluates to "false". In this case, the server MUST > > > >> > > > >> reply with an "unknown-element" in the . > > > >> > > > >> > > > >> > > > >> YANG module： > > > >> > > > >> module foo { > > > >> > > > >> namespace “http://foo.com”; > > > >> > > > >> prefix “foo”; > > > >> > > > >> Leaf a {…} > > > >> > > > >> Leaf b { > > > >> > > > >> When “a = 10”; > > > >> > > > >> } > > > >> > > > >> } > > > >> Scene 1: > > > >> > > > >> The first edit-config request: > > > >> > > > >> > > > >> > > > >> > > > >> > > > >> > > > >> > > > >> > > > >> > > > >> > > > >> > > > >> 3 > > > >> > > > >> > > > >> > > > >> > > > >> > > > >> This request will set a = 3. > > > >> > > > >> > > > >> > > > >> The second request: > > > >> > > > >> > > > >> > > > >> > > > >> > > > >> > > > >> > > > >> > > > >> > > > >> > > > >> > > > >> 10 > > > >> > > > >> 5 > > > >> > > > >> > > > >> > > > >> > > > >> > > > >> > > > >> > > > >> According 8.3.1, in rpc payload parsing phase, the a’s value in candidate > > > >> datastore is 3,so leaf b’s when condition is evaluated to false, server > > > >> will report ‘unknown-element’ error. > > > >> > > > >> Is it expected by user? > > > >> Scene 2: > > > >> > > > >> The first edit-config request: > > > >> > > > >> > > > >> > > > >> > > > >> > > > >> > > > >> > > > >> > > > >> > > > >> > > > >> > > > >> 10 > > > >> > > > >> > > > >> > > > >> > > > >> > > > >> This request will set a = 10. > > > >> > > > >> > > > >> > > > >> The second request: > > > >> > > > >> > > > >> > > > >> > > > >> > > > >> > > > >> > > > >> > > > >> > > > >> > > > >> > > > >> 3 > > > >> > > > >> 5 > > > >> > > > >> > > > >> > > > >> > > > >> > > > >> According 8.3.1, in rpc payload parsing phase, the a’s value in candidate > > > >> datastore is 10, so leaf b’s when condition is evaluated to true, server > > > >> will accept this request in payload parsing phase. > > > >> > > > >> > > > >> > > > >> In edit-config request processing phase, if leaf a’s modification is > > > >> processed firstly, the a’s value will be changed to 3, so the b’s when > > > >> condition will be false, when server process b’s modification, b will be > > > >> treated as unknown-element, the edit-config request will fail. > > > >> > > > >> If leaf b’s modification is processed firstly, server will accept this > > > >> modification ,because b’s when condition is true, and when server process > > > >> a’s modification , this modification will be accepted, and b’s when > > > >> condition will be evaluated to false, leaf b will be deleted > automatically, > > > >> the edit-config request will be OK. > > > >> > > > >> > > > >> > > > >> How server should process this situation? > > > >> > > > >> > > > >> > > > >> _______________________________________________ > > > >> netmod mailing list > > > >> netmod@ietf.org > > > >> https://www.ietf.org/mailman/listinfo/netmod > > > >> > > > >> > > > > _______________________________________________ > > > > netmod mailing list > > > > netmod@ietf.org > > > > https://www.ietf.org/mailman/listinfo/netmod > > > > > > -- > > > Ladislav Lhotka > > > Head, CZ.NIC Labs > > > PGP Key ID: 0xB8F92B08A9F76C67 > > > > > > _______________________________________________ > > > netmod mailing list > > > netmod@ietf.org > > > https://www.ietf.org/mailman/listinfo/netmod > -- Ladislav Lhotka Head, CZ.NIC Labs PGP Key ID: 0xB8F92B08A9F76C67 From nobody Thu Sep 26 00:46:09 2019 Return-Path: X-Original-To: netmod@ietfa.amsl.com Delivered-To: netmod@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 7BEFD120820 for ; Thu, 26 Sep 2019 00:45:55 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.899 X-Spam-Level: X-Spam-Status: No, score=-1.899 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 6ej4ElD820BU for ; Thu, 26 Sep 2019 00:45:53 -0700 (PDT) Received: from mail.tail-f.com (mail.tail-f.com [46.21.102.45]) by ietfa.amsl.com (Postfix) with ESMTP id 40A7B12083F for ; Thu, 26 Sep 2019 00:45:53 -0700 (PDT) Received: from localhost (unknown [173.38.220.41]) by mail.tail-f.com (Postfix) with ESMTPSA id A84511AE018A; Thu, 26 Sep 2019 09:45:51 +0200 (CEST) Date: Thu, 26 Sep 2019 09:45:26 +0200 (CEST) Message-Id: <20190926.094526.272771637371098799.mbj@tail-f.com> To: lhotka@nic.cz Cc: andy@yumaworks.com, jason.sterne@nokia.com, netmod@ietf.org, yangang@huawei.com From: Martin Bjorklund In-Reply-To: <9bc06f9f3f1c87c79ccce4e1c4d40755c804875a.camel@nic.cz> References: <87h84z4kmw.fsf@nic.cz> <20190926.085644.1268671875357328723.mbj@tail-f.com> <9bc06f9f3f1c87c79ccce4e1c4d40755c804875a.camel@nic.cz> X-Mailer: Mew version 6.7 on Emacs 25.2 / Mule 6.0 (HANACHIRUSATO) Mime-Version: 1.0 Content-Type: Text/Plain; charset=utf-8 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nobody Thu Sep 26 03:27:25 2019 Return-Path: X-Original-To: netmod@ietfa.amsl.com Delivered-To: netmod@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 2AC2B120899 for ; Thu, 26 Sep 2019 03:27:23 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -6.997 X-Spam-Level: X-Spam-Status: No, score=-6.997 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_HI=-5, SPF_HELO_NONE=0.001, SPF_NONE=0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1024-bit key) header.d=nic.cz Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id McnVGgQr-1yZ for ; Thu, 26 Sep 2019 03:27:20 -0700 (PDT) Received: from mail.nic.cz (mail.nic.cz [IPv6:2001:1488:800:400::400]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id A0336120890 for ; Thu, 26 Sep 2019 03:27:19 -0700 (PDT) Received: from birdie (unknown [IPv6:2001:1488:fffe:6:a744:2697:a0ec:a420]) by mail.nic.cz (Postfix) with ESMTPSA id 9103E140ADA; Thu, 26 Sep 2019 12:27:17 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=nic.cz; s=default; t=1569493637; bh=wK0uSKa2tiyjtD1X7lWAd8yiPNHpOTrL5laLJW7z1o4=; h=From:To:Date; b=e9om+o2DhdjqZ/cjlIU15HFzFMLmDhq0GrD1ge5CuV2Xr+zOdQjzn7o5XseGi6BHK y10+spSsD3NgA7abdd9CNoUCdVQP1UV/ktFkK5I0kgpHONqlFaKv+RkKJsSaW+eSqI SmaFjyIfOrZldDURUZjyBUvk5cGn86ppnxP+eIyA= Message-ID: <229de5aa1bd41ea6a30b920c9c83321903294f49.camel@nic.cz> From: Ladislav Lhotka To: =?ISO-8859-1?Q?Sch=F6nw=E4lder=2C_J=FCrgen?= Cc: "netmod@ietf.org" Date: Thu, 26 Sep 2019 12:27:17 +0200 In-Reply-To: <20190926093950.a5anv5zdbjtb7iwo@anna.jacobs.jacobs-university.de> References: <87h84z4kmw.fsf@nic.cz> <20190926.085644.1268671875357328723.mbj@tail-f.com> <9bc06f9f3f1c87c79ccce4e1c4d40755c804875a.camel@nic.cz> <20190926.094526.272771637371098799.mbj@tail-f.com> <20190926093950.a5anv5zdbjtb7iwo@anna.jacobs.jacobs-university.de> Organization: CZ.NIC Content-Type: text/plain; charset="UTF-8" User-Agent: Evolution 3.34.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Virus-Scanned: clamav-milter 0.100.3 at mail.nic.cz X-Virus-Status: Clean Archived-At: Subject: Re: [netmod] =?utf-8?b?562U5aSNOiDnrZTlpI06IFBsZWFzZSBjbGFyaWZ5IGlt?= =?utf-8?b?cGxlbWVudGF0aW9uIGFib3V0IOKAmHdoZW7igJk=?= X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 26 Sep 2019 10:27:23 -0000 On Thu, 2019-09-26 at 09:39 +0000, Schönwälder, Jürgen wrote: > On Thu, Sep 26, 2019 at 09:45:26AM +0200, Martin Bjorklund wrote: > > > > > o There MUST be no nodes tagged with "when" present if the "when" > > > > > condition evaluates to "false" in the data tree. > > > > > > > > It also says in 8.2: > > > > > > > > o If a request modifies a configuration data node such that any > > > > node's "when" expression becomes false, then the node in the data > > > > tree with the "when" expression is deleted by the server. > > > > > > Right. But the request won't modify a configuration data node because it > > > is > > > rejected. So the premise of the above implication doesn't hold, and the > > > conclusion doesn't apply. > > > > With the same logic you can claim conformance if you reject a request > > to create nodes under a case if another case is active. I think it is > > quite clear that this auto-deletion is part of the spec, and something > > clients can rely on. If the intention had been that this was optional > > to implement, it would have been clearly stated, and there would have > > been mechanism present for clients to detect this. > > > > Yes, this auto-delete behaviour is part of the specification and it > was not an oversight that this slipped in. Of course I know it was the intention, even though I have been against it all the time. > > Sure, one can discuss whether this feature is useful or harmful > but the only way to officially remove this is to create a new > specification and to run it through the IETF process. I do insist that the wording in 7950 permits my interpretation, so I don't propose any change. What I propose instead is to remove such protocol-specific parts from the specification of the YANG language, and clarify it in the specification of individual protocols. Lada > > /js > > -- > Juergen Schoenwaelder Jacobs University Bremen gGmbH > Phone: +49 421 200 3587 Campus Ring 1 | 28759 Bremen | Germany > Fax: +49 421 200 3103 -- Ladislav Lhotka Head, CZ.NIC Labs PGP Key ID: 0xB8F92B08A9F76C67 From nobody Thu Sep 26 03:31:54 2019 Return-Path: X-Original-To: netmod@ietfa.amsl.com Delivered-To: netmod@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 741A91208C2 for ; Thu, 26 Sep 2019 03:31:45 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -14.5 X-Spam-Level: X-Spam-Status: No, score=-14.5 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_HI=-5, SPF_PASS=-0.001, URIBL_BLOCKED=0.001, USER_IN_DEF_DKIM_WL=-7.5] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1024-bit key) header.d=cisco.com header.b=cdyceHUs; dkim=pass (1024-bit key) header.d=cisco.onmicrosoft.com header.b=BHUcGqH/ Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id AyoVcX2mLvIx for ; 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Thu, 26 Sep 2019 11:04:36 +0000 From: =?utf-8?B?U2Now7Zud8OkbGRlciwgSsO8cmdlbg==?= To: Ladislav Lhotka CC: "netmod@ietf.org" Thread-Topic: =?utf-8?B?W25ldG1vZF0g562U5aSNOiDnrZTlpI06IFBsZWFzZSBjbGFyaWZ5IGltcGxl?= =?utf-8?B?bWVudGF0aW9uIGFib3V0IOKAmHdoZW7igJk=?= Thread-Index: AQHVdE5YPGxz5B41HEe6qg1OCwgbgKc9wVSAgAAKa4A= Date: Thu, 26 Sep 2019 11:04:36 +0000 Message-ID: <20190926110435.3vaqzw6pqsnker3s@anna.jacobs.jacobs-university.de> References: <87h84z4kmw.fsf@nic.cz> <20190926.085644.1268671875357328723.mbj@tail-f.com> <9bc06f9f3f1c87c79ccce4e1c4d40755c804875a.camel@nic.cz> <20190926.094526.272771637371098799.mbj@tail-f.com> <20190926093950.a5anv5zdbjtb7iwo@anna.jacobs.jacobs-university.de> <229de5aa1bd41ea6a30b920c9c83321903294f49.camel@nic.cz> In-Reply-To: <229de5aa1bd41ea6a30b920c9c83321903294f49.camel@nic.cz> Reply-To: =?utf-8?B?U2Now7Zud8OkbGRlciwgSsO8cmdlbg==?= Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-clientproxiedby: AM0PR04CA0018.eurprd04.prod.outlook.com (2603:10a6:208:122::31) To VI1P190MB0686.EURP190.PROD.OUTLOOK.COM (2603:10a6:800:12e::7) authentication-results: spf=none (sender IP is ) smtp.mailfrom=J.Schoenwaelder@jacobs-university.de; 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Thu, 26 Sep 2019 13:29:52 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=nic.cz; s=default; t=1569497392; bh=vjuAZLW5l7DFSvnpvPavR0z0gfNMIhw6fwf4uRhOblU=; h=From:To:Date; b=euFohDwncljEfdjxDQbH+fmyZhbzB7+6M+Cr/OTFnGH/vctyEfSFa1VxMnKa4GGcg BQEKEmqd8Y25dqyqxpQRNw7QYYcsTBz+o+MWjFovuV1HfI+brqPEiVUmjWukuvGbIA lE9AyBm2Q3oe6xr/PeXB+ErA1+s7AtpI6osdrSr8= Message-ID: <87f295bea85a4b38dd2f7775e78f53464512878b.camel@nic.cz> From: Ladislav Lhotka To: =?ISO-8859-1?Q?Sch=F6nw=E4lder=2C_J=FCrgen?= Cc: "netmod@ietf.org" Date: Thu, 26 Sep 2019 13:29:52 +0200 In-Reply-To: <20190926110435.3vaqzw6pqsnker3s@anna.jacobs.jacobs-university.de> References: <87h84z4kmw.fsf@nic.cz> <20190926.085644.1268671875357328723.mbj@tail-f.com> <9bc06f9f3f1c87c79ccce4e1c4d40755c804875a.camel@nic.cz> <20190926.094526.272771637371098799.mbj@tail-f.com> <20190926093950.a5anv5zdbjtb7iwo@anna.jacobs.jacobs-university.de> <229de5aa1bd41ea6a30b920c9c83321903294f49.camel@nic.cz> <20190926110435.3vaqzw6pqsnker3s@anna.jacobs.jacobs-university.de> Organization: CZ.NIC Content-Type: text/plain; charset="UTF-8" User-Agent: Evolution 3.34.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Virus-Scanned: clamav-milter 0.100.3 at mail.nic.cz X-Virus-Status: Clean Archived-At: Subject: Re: [netmod] =?utf-8?b?562U5aSNOiDnrZTlpI06IFBsZWFzZSBjbGFyaWZ5IGlt?= =?utf-8?b?cGxlbWVudGF0aW9uIGFib3V0IOKAmHdoZW7igJk=?= X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 26 Sep 2019 11:29:57 -0000 On Thu, 2019-09-26 at 11:04 +0000, Schönwälder, Jürgen wrote: > On Thu, Sep 26, 2019 at 12:27:17PM +0200, Ladislav Lhotka wrote: > > > Sure, one can discuss whether this feature is useful or harmful > > > but the only way to officially remove this is to create a new > > > specification and to run it through the IETF process. > > > > I do insist that the wording in 7950 permits my interpretation, so I don't > > propose any change. > > It does not. You cannot cherry pick sentences. I am not aware of any cherry-picking on my side. Can you show that my interpretation is not possible? Whatever the intent was, it is the text of the spec that counts. > > > What I propose instead is to remove such protocol-specific parts from the > > specification of the YANG language, and clarify it in the specification of > > individual protocols. > > This is a different topic. Moving things around does not change the > meaning (unless you change things as well while moving things around). I wrote about clarification of protocols or server behaviour, which means changes. It is also possible that different protocols use different approaches. Lada > > /js > > -- > Juergen Schoenwaelder Jacobs University Bremen gGmbH > Phone: +49 421 200 3587 Campus Ring 1 | 28759 Bremen | Germany > Fax: +49 421 200 3103 -- Ladislav Lhotka Head, CZ.NIC Labs PGP Key ID: 0xB8F92B08A9F76C67 From nobody Thu Sep 26 05:12:17 2019 Return-Path: X-Original-To: netmod@ietfa.amsl.com Delivered-To: netmod@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 124CA120123 for ; Thu, 26 Sep 2019 05:12:15 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.899 X-Spam-Level: X-Spam-Status: No, score=-1.899 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id XPQUkVL8AaMk for ; Thu, 26 Sep 2019 05:12:13 -0700 (PDT) Received: from mail.tail-f.com (mail.tail-f.com [46.21.102.45]) by ietfa.amsl.com (Postfix) with ESMTP id 23A26120047 for ; Thu, 26 Sep 2019 05:12:13 -0700 (PDT) Received: from localhost (unknown [173.38.220.41]) by mail.tail-f.com (Postfix) with ESMTPSA id 0F9381AE018A; Thu, 26 Sep 2019 14:12:11 +0200 (CEST) Date: Thu, 26 Sep 2019 14:11:46 +0200 (CEST) Message-Id: <20190926.141146.1645978108701885454.mbj@tail-f.com> To: lhotka@nic.cz Cc: J.Schoenwaelder@jacobs-university.de, netmod@ietf.org From: Martin Bjorklund In-Reply-To: <87f295bea85a4b38dd2f7775e78f53464512878b.camel@nic.cz> References: <229de5aa1bd41ea6a30b920c9c83321903294f49.camel@nic.cz> <20190926110435.3vaqzw6pqsnker3s@anna.jacobs.jacobs-university.de> <87f295bea85a4b38dd2f7775e78f53464512878b.camel@nic.cz> X-Mailer: Mew version 6.7 on Emacs 25.2 / Mule 6.0 (HANACHIRUSATO) Mime-Version: 1.0 Content-Type: Text/Plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable Archived-At: Subject: Re: [netmod] =?utf-8?b?562U5aSNOiDnrZTlpI06IFBsZWFzZSBjbGFyaWZ5IGlt?= =?utf-8?b?cGxlbWVudGF0aW9uIGFib3V0IOKAmHdoZW7igJk=?= X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 26 Sep 2019 12:12:15 -0000 Ladislav Lhotka wrote: > On Thu, 2019-09-26 at 11:04 +0000, Sch=F6nw=E4lder, J=FCrgen wrote: > > On Thu, Sep 26, 2019 at 12:27:17PM +0200, Ladislav Lhotka wrote: > > > > Sure, one can discuss whether this feature is useful or harmful= > > > > but the only way to officially remove this is to create a new > > > > specification and to run it through the IETF process. > > > = > > > I do insist that the wording in 7950 permits my interpretation, s= o I don't > > > propose any change. > > = > > It does not. You cannot cherry pick sentences. > = > I am not aware of any cherry-picking on my side. Can you show that my= > interpretation is not possible? 8.2 says: o If a request modifies a configuration data node such that any node's "when" expression becomes false, then the node in the data= =3D tree with the "when" expression is deleted by the server. This means that requests can modify config this way, otherwise this text wouldn't be there. This is not just an intention, but follows from the text. > Whatever the intent was, it is the text of the > spec that counts. With this logic, no client can be certain of anything; a server would be free to reject legal requests in any way it liked. For example it would be perfectly fine for a server to only accept requests that modifies a single leaf at the time. /martin > = > > = > > > What I propose instead is to remove such protocol-specific parts = from the > > > specification of the YANG language, and clarify it in the specifi= cation of > > > individual protocols. > > = > > This is a different topic. Moving things around does not change the= > > meaning (unless you change things as well while moving things aroun= d). > = > I wrote about clarification of protocols or server behaviour, which m= eans > changes. It is also possible that different protocols use different a= pproaches. > = > Lada > = > > = > > /js > > = > > -- = > > Juergen Schoenwaelder Jacobs University Bremen gGmbH > > Phone: +49 421 200 3587 Campus Ring 1 | 28759 Bremen | Germ= any > > Fax: +49 421 200 3103 = > -- = > Ladislav Lhotka > Head, CZ.NIC Labs > PGP Key ID: 0xB8F92B08A9F76C67 > = > _______________________________________________ > netmod mailing list > netmod@ietf.org > https://www.ietf.org/mailman/listinfo/netmod From nobody Thu Sep 26 06:43:44 2019 Return-Path: X-Original-To: netmod@ietfa.amsl.com Delivered-To: netmod@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id C654B120041 for ; Thu, 26 Sep 2019 06:43:41 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.897 X-Spam-Level: X-Spam-Status: No, score=-1.897 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, SPF_HELO_NONE=0.001, SPF_NONE=0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 0acDHXoaduUL for ; Thu, 26 Sep 2019 06:43:39 -0700 (PDT) Received: from trail.lhotka.name (trail.lhotka.name [77.48.224.143]) by ietfa.amsl.com (Postfix) with ESMTP id 06E7712002F for ; Thu, 26 Sep 2019 06:43:38 -0700 (PDT) Received: by trail.lhotka.name (Postfix, from userid 109) id 2950E1821291; Thu, 26 Sep 2019 15:45:09 +0200 (CEST) Received: from localhost (nat-1.nic.cz [217.31.205.1]) by trail.lhotka.name (Postfix) with ESMTPSA id 568FB1821290; Thu, 26 Sep 2019 15:45:07 +0200 (CEST) From: Ladislav Lhotka To: Martin Bjorklund Cc: J.Schoenwaelder@jacobs-university.de, netmod@ietf.org In-Reply-To: <20190926.141146.1645978108701885454.mbj@tail-f.com> References: <229de5aa1bd41ea6a30b920c9c83321903294f49.camel@nic.cz> <20190926110435.3vaqzw6pqsnker3s@anna.jacobs.jacobs-university.de> <87f295bea85a4b38dd2f7775e78f53464512878b.camel@nic.cz> <20190926.141146.1645978108701885454.mbj@tail-f.com> Mail-Followup-To: Martin Bjorklund , J.Schoenwaelder@jacobs-university.de, netmod@ietf.org Date: Thu, 26 Sep 2019 15:43:34 +0200 Message-ID: <875zlf41h5.fsf@nic.cz> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Archived-At: Subject: Re: [netmod] =?utf-8?b?562U5aSNOiDnrZTlpI06IFBsZWFzZSBjbGFyaWZ5IGlt?= =?utf-8?b?cGxlbWVudGF0aW9uIGFib3V0IOKAmHdoZW7igJk=?= X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 26 Sep 2019 13:43:42 -0000 Martin Bjorklund writes: > Ladislav Lhotka wrote: >> On Thu, 2019-09-26 at 11:04 +0000, Sch=C3=B6nw=C3=A4lder, J=C3=BCrgen wr= ote: >> > On Thu, Sep 26, 2019 at 12:27:17PM +0200, Ladislav Lhotka wrote: >> > > > Sure, one can discuss whether this feature is useful or harmful >> > > > but the only way to officially remove this is to create a new >> > > > specification and to run it through the IETF process. >> > >=20 >> > > I do insist that the wording in 7950 permits my interpretation, so I= don't >> > > propose any change. >> >=20 >> > It does not. You cannot cherry pick sentences. >>=20 >> I am not aware of any cherry-picking on my side. Can you show that my >> interpretation is not possible? > > 8.2 says: > > o If a request modifies a configuration data node such that any > node's "when" expression becomes false, then the node in the data=3D > > tree with the "when" expression is deleted by the server. > > This means that requests can modify config this way, otherwise this > text wouldn't be there. This is not just an intention, but follows > from the text. > >> Whatever the intent was, it is the text of the >> spec that counts. > > With this logic, no client can be certain of anything; a server would > be free to reject legal requests in any way it liked. For example it > would be perfectly fine for a server to only accept requests that > modifies a single leaf at the time. > This is quite different. If a client tries to violate e.g. the "pattern" pr= operty, the request is rejected. So there is a reason for the server to do = the same for the other items in the same list of properties that have to be= true in all trees. Again, I think the biggest problem is that YANG spec attempts to "hardcode"= this (and other) protocol behaviour. Different protocols and different dep= loyments clearly need different approaches, and I think we have to live wit= h it. Our (NETMOD) priority should IMO be to make YANG as widely usable as = possible, and enforcing arbitrary protocol policies certainly doesn't help. Lada > > > /martin > > > >>=20 >> >=20 >> > > What I propose instead is to remove such protocol-specific parts fro= m the >> > > specification of the YANG language, and clarify it in the specificat= ion of >> > > individual protocols. >> >=20 >> > This is a different topic. Moving things around does not change the >> > meaning (unless you change things as well while moving things around). >>=20 >> I wrote about clarification of protocols or server behaviour, which means >> changes. It is also possible that different protocols use different appr= oaches. >>=20 >> Lada >>=20 >> >=20 >> > /js >> >=20 >> > --=20 >> > Juergen Schoenwaelder Jacobs University Bremen gGmbH >> > Phone: +49 421 200 3587 Campus Ring 1 | 28759 Bremen | Germany >> > Fax: +49 421 200 3103 >> --=20 >> Ladislav Lhotka >> Head, CZ.NIC Labs >> PGP Key ID: 0xB8F92B08A9F76C67 >>=20 >> _______________________________________________ >> netmod mailing list >> netmod@ietf.org >> https://www.ietf.org/mailman/listinfo/netmod --=20 Ladislav Lhotka=20 Head, CZ.NIC Labs PGP Key ID: 0xB8F92B08A9F76C67 From nobody Thu Sep 26 07:33:36 2019 Return-Path: X-Original-To: netmod@ietfa.amsl.com Delivered-To: netmod@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id ADEEC120271 for ; Thu, 26 Sep 2019 07:33:34 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.898 X-Spam-Level: X-Spam-Status: No, score=-1.898 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=yumaworks-com.20150623.gappssmtp.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id eZSNDFI9O6KS for ; Thu, 26 Sep 2019 07:33:31 -0700 (PDT) Received: from mail-lj1-x236.google.com (mail-lj1-x236.google.com [IPv6:2a00:1450:4864:20::236]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 484861201DB for ; Thu, 26 Sep 2019 07:33:31 -0700 (PDT) Received: by mail-lj1-x236.google.com with SMTP id n14so2407970ljj.10 for ; Thu, 26 Sep 2019 07:33:31 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yumaworks-com.20150623.gappssmtp.com; s=20150623; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=Y3DeIegahKwRpkvjqdK8blOZzG+1hjB5HX2tRbJQvWw=; b=RN6RfBWPJEKmq5pP0g1Ke5O91uf+SteVrdjhbXNSCQgxZJh5uXChAMBp3rLPhFqAZC Yc43gUIZKw27RfPjfSiOcnb2GRhGSiCI9EnHle1bqW9Y7aaBkWtjmjwY1i+VJwJbl/6v VHyJza9ouxJDQWvEIGA1h6fL8DdR/amWrgjpPUKax77BRiJa1JLSbrtIhsn9IzX0NsqC LIVmUoMJDCbntzjLwL0jOnH9UnScos14iq4swaBRsRfVjOakKb9IqszILFvIU8psoRBc WBq8eDxsouoJElYxS1fGMUQkz0FrNj8W+ghSqVhIRG4BnPmrz5yJj6q43Za1TpGjnv7P B/1A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=Y3DeIegahKwRpkvjqdK8blOZzG+1hjB5HX2tRbJQvWw=; b=Sw1kE0dmzLBf0ntPZo6s4lbRI9+V04aAoBvphNT6kaDgdCl8qnMBlz+poPFf52yaqS 1cXJOO4tSIOjqW//NqAMAV1UEfQacBShfxzlrqCuRqpkXg8RRNm3Hc1L0PIKpGkcvHor TcLQ9eXCvbyev2jJvbTpv5VMxQL0GZpJu6DkHsYbUlbj9Ox7JItMecLTgLMBqxfwSEdF a++g6iLPNepuFka34CWwklzIwRHsKQk5OlK5yZhHM79A83s13rayQisqVfqfSChTFVgN pMoPH5pW0jpQdxfuOeJYC8ZKfedapdAPkraoY69PSTv1GVMa0qZytGvzhcR5yDQM/9x2 FueA== X-Gm-Message-State: APjAAAXLDvTsRslRaGfVTokCNwEXXV4Z5fgZXG+wEN49kWRFzUR7BHt7 5/9ZrpNH0bFbCBkOZF9NI71nr0cosqN6dxAGGUv+lg== X-Google-Smtp-Source: APXvYqyhfXV6nDqM4UvS/Fg822kat6re75TNkenbl5+SC7P0zvFP6wH+Kfri9IijqEoQAPXyGtet6zgJmN5HPrvU6Is= X-Received: by 2002:a05:651c:104b:: with SMTP id x11mr2904319ljm.218.1569508409329; Thu, 26 Sep 2019 07:33:29 -0700 (PDT) MIME-Version: 1.0 References: <87h84z4kmw.fsf@nic.cz> <20190926.085644.1268671875357328723.mbj@tail-f.com> <9bc06f9f3f1c87c79ccce4e1c4d40755c804875a.camel@nic.cz> <20190926.094526.272771637371098799.mbj@tail-f.com> In-Reply-To: From: Andy Bierman Date: Thu, 26 Sep 2019 07:33:18 -0700 Message-ID: To: "Rob Wilton (rwilton)" Cc: Martin Bjorklund , "lhotka@nic.cz" , "netmod@ietf.org" , "yangang@huawei.com" Content-Type: multipart/alternative; boundary="00000000000035e418059375a77b" Archived-At: Subject: Re: [netmod] =?utf-8?b?562U5aSNOiDnrZTlpI06IFBsZWFzZSBjbGFyaWZ5IGlt?= =?utf-8?b?cGxlbWVudGF0aW9uIGFib3V0IOKAmHdoZW7igJk=?= X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 26 Sep 2019 14:33:35 -0000 --00000000000035e418059375a77b Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Thu, Sep 26, 2019 at 3:32 AM Rob Wilton (rwilton) wrote: > > > > -----Original Message----- > > From: netmod On Behalf Of Martin Bjorklund > > Sent: 26 September 2019 08:45 > > To: lhotka@nic.cz > > Cc: yangang@huawei.com; netmod@ietf.org > > Subject: Re: [netmod] =E7=AD=94=E5=A4=8D: =E7=AD=94=E5=A4=8D: Please cl= arify implementation about > > =E2=80=98when=E2=80=99 > > > > > > > > > > It also says in 8.2: > > > > > > > > o If a request modifies a configuration data node such that any > > > > node's "when" expression becomes false, then the node in the > > data > > > > tree with the "when" expression is deleted by the server. > > > > > > Right. But the request won't modify a configuration data node because > > > it is rejected. So the premise of the above implication doesn't hold, > > > and the conclusion doesn't apply. > > > > With the same logic you can claim conformance if you reject a request t= o > > create nodes under a case if another case is active. I think it is qui= te > > clear that this auto-deletion is part of the spec, and something client= s > > can rely on. If the intention had been that this was optional to > > implement, it would have been clearly stated, and there would have been > > mechanism present for clients to detect this. > > > I don't like the 'when' behaviour, I would have rather that clients were > forced to delete the configuration explicitly (or pass an option for an > implicit delete). > > I hear the opposite from customers. They insist that the server implement every last detail of the machine-readable YANG, especially when-stmt auto-deletion. The auto-cleanup is seen as a feature. > However, I do agree with Martin & Juergen, that the intent of the spec is > that servers perform the 'when' auto-delete behaviour, and clients must b= e > able to rely on compliant servers behaving this way. > > agreed. It is hard to argue against consistent, predicable server behavior for datastore editing. (NP containers and NMDA are also causing problems, and should be fixed in yang-next if that ever happens). Thanks, > Rob > > Andy > > > > > /martin > > _______________________________________________ > > netmod mailing list > > netmod@ietf.org > > https://www.ietf.org/mailman/listinfo/netmod > _______________________________________________ > netmod mailing list > netmod@ietf.org > https://www.ietf.org/mailman/listinfo/netmod > --00000000000035e418059375a77b Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable


=
On Thu, Sep 26, 2019 at 3:32 AM Rob W= ilton (rwilton) <rwilton@cisco.com<= /a>> wrote:
<= br>
> -----Original Message-----
> From: netmod <netmod-bounces@ietf.org> On Behalf Of Martin Bjorklund
> Sent: 26 September 2019 08:45
> To: lhotka@nic.cz
> Cc: yangang@hu= awei.com; netmod@i= etf.org
> Subject: Re: [netmod] =E7=AD=94=E5=A4=8D: =E7=AD=94=E5=A4=8D: Please c= larify implementation about
> =E2=80=98when=E2=80=99
>
> > >
> > > It also says in 8.2:
> > >
> > >=C2=A0 =C2=A0 o=C2=A0 If a request modifies a configuration d= ata node such that any
> > >=C2=A0 =C2=A0 =C2=A0 =C2=A0node's "when" expres= sion becomes false, then the node in the
> data
> > >=C2=A0 =C2=A0 =C2=A0 =C2=A0tree with the "when" exp= ression is deleted by the server.
> >
> > Right. But the request won't modify a configuration data node= because
> > it is rejected. So the premise of the above implication doesn'= ;t hold,
> > and the conclusion doesn't apply.
>
> With the same logic you can claim conformance if you reject a request = to
> create nodes under a case if another case is active.=C2=A0 I think it = is quite
> clear that this auto-deletion is part of the spec, and something clien= ts
> can rely on.=C2=A0 If the intention had been that this was optional to=
> implement, it would have been clearly stated, and there would have bee= n
> mechanism present for clients to detect this.
>
I don't like the 'when' behaviour, I would have rather that cli= ents were forced to delete the configuration explicitly (or pass an option = for an implicit delete).


I hear the opposite from customers.
They insist that the server implement every last detail of the mach= ine-readable YANG,
especially when-stmt auto-deletion. The auto-c= leanup is seen as a feature.
=C2=A0
However, I do agree with Martin & Juergen, that the intent of the spec = is that servers perform the 'when' auto-delete behaviour, and clien= ts must be able to rely on compliant servers behaving this way.


agreed.
It is hard to argue = against consistent, predicable=C2=A0server behavior
for datastore= editing.=C2=A0 (NP containers and NMDA are also causing problems,
and should be fixed in yang-next if that ever happens).


Thanks,
Rob



Andy
=C2=A0

>
> /martin
> _______________________________________________
> netmod mailing list
> netmod@ietf.org
> https://www.ietf.org/mailman/listinfo/netmod _______________________________________________
netmod mailing list
netmod@ietf.org https://www.ietf.org/mailman/listinfo/netmod
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boundary="000000000000451bf205937851c7" Archived-At: Subject: Re: [netmod] =?utf-8?q?What=27s_the_problem_with_NMDA=3F_was_Re=3A__?= =?utf-8?b?562U5aSNOiDnrZTlpI06IFBsZWFzZSBjbGFyaWZ5IGltcGxlbWVudGF0aW9u?= =?utf-8?b?IGFib3V0IOKAmHdoZW7igJk=?= X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 26 Sep 2019 17:44:18 -0000 --000000000000451bf205937851c7 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hi, On Thu, Sep 26, 2019 at 9:14 AM tom petch wrote: > Inline > > Tom Petch > > ----- Original Message ----- > From: "Andy Bierman" > To: "Rob Wilton (rwilton)" > Cc: ; > Sent: Thursday, September 26, 2019 3:33 PM > > On Thu, Sep 26, 2019 at 3:32 AM Rob Wilton (rwilton) > wrote: > > > > > > > > -----Original Message----- > > > From: netmod On Behalf Of Martin Bjorklund > > > Sent: 26 September 2019 08:45 > > > To: lhotka@nic.cz > > > Cc: yangang@huawei.com; netmod@ietf.org > > > Subject: Re: [netmod] =E7=AD=94=E5=A4=8D: =E7=AD=94=E5=A4=8D: Please = clarify implementation about > > > =E2=80=98when=E2=80=99 > > > > > > > > > > > > > It also says in 8.2: > > > > > > > > > > o If a request modifies a configuration data node such that > any > > > > > node's "when" expression becomes false, then the node in > the > > > data > > > > > tree with the "when" expression is deleted by the server. > > > > > > > > Right. But the request won't modify a configuration data node > because > > > > it is rejected. So the premise of the above implication doesn't > hold, > > > > and the conclusion doesn't apply. > > > > > > With the same logic you can claim conformance if you reject a > request to > > > create nodes under a case if another case is active. I think it is > quite > > > clear that this auto-deletion is part of the spec, and something > clients > > > can rely on. If the intention had been that this was optional to > > > implement, it would have been clearly stated, and there would have > been > > > mechanism present for clients to detect this. > > > > > I don't like the 'when' behaviour, I would have rather that clients > were > > forced to delete the configuration explicitly (or pass an option for > an > > implicit delete). > > I hear the opposite from customers. > They insist that the server implement every last detail of the > machine-readable YANG, > especially when-stmt auto-deletion. The auto-cleanup is seen as a > feature. > > > However, I do agree with Martin & Juergen, that the intent of the spec > is > > that servers perform the 'when' auto-delete behaviour, and clients > must be > > able to rely on compliant servers behaving this way. > > > > agreed. > It is hard to argue against consistent, predicable server behavior > for datastore editing. (NP containers and NMDA are also causing > problems, > and should be fixed in yang-next if that ever happens). > > > > Andy > > This caught my eye. What is the problem with NMDA? Anything specific? > > My own problem is that it is different to what has been proposed as > suitable for the previous 12 years but I doubt if many customers would > think that. > > My comments are in the context of operator expectations for consistent implementations. The first problem with NMDA is the new YANG library. There is an assumption that the client can and will change from an architecture where there is 1 schema tree per server to an architecture where there can be a completely different schema tree for configuration vs operational datastores. There is no such desire or willingness on the client side to properly address this complexity. IMO NMDA is going to need to function without this complexity. The benefits of are not hindered at all (in a properly implemented server) if /yang-library is left out. The IETF has completely punted the problem of converting data for a configuration datastore to the schema tree for . Deviations may be different. A leaf may be string in 1 tree and decimal64 in the other. There is an incorrect assumption that software developers will deal with these corner-cases (correctly and consistently). The other big problem is an untested NMDA transition strategy that is not well understood by vendors. Should non-NMDA (/foo-state) be visible to or just ? Using the YANG library to separate the modules relies on the assumption tha= t the client is capable of managing each datastore independently (instead of 1 schema tree per server). > Tom Petch > > Andy > Thanks, > > Rob > > > > > > Andy > > > > > > > > > > /martin > > > _______________________________________________ > > > netmod mailing list > > > netmod@ietf.org > > > https://www.ietf.org/mailman/listinfo/netmod > > _______________________________________________ > > --000000000000451bf205937851c7 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hi,


On Thu, Sep 26, 2019 at 9:14 AM tom= petch <ietfc@btconnect.com&g= t; wrote:
Inline=

Tom Petch

----- Original Message -----
From: "Andy Bierman" <andy@yumaworks.com>
To: "Rob Wilton (rwilton)" <rwilton@cisco.com>
Cc: <netmod@ietf.or= g>; <yang= ang@huawei.com>
Sent: Thursday, September 26, 2019 3:33 PM

On Thu, Sep 26, 2019 at 3:32 AM Rob Wilton (rwilton) <rwilton@cisco.com>
wrote:

>
>
> > -----Original Message-----
> > From: netmod <netmod-bounces@ietf.org> On Behalf Of Martin Bjorklund<= br> > > Sent: 26 September 2019 08:45
> > To: lhotka@nic= .cz
> > Cc: yanga= ng@huawei.com; net= mod@ietf.org
> > Subject: Re: [netmod] =E7=AD=94=E5=A4=8D: =E7=AD=94=E5=A4=8D: Ple= ase clarify implementation about
> > =E2=80=98when=E2=80=99
> >
> > > >
> > > > It also says in 8.2:
> > > >
> > > >=C2=A0 =C2=A0 o=C2=A0 If a request modifies a configurat= ion data node such that
any
> > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0node's "when" e= xpression becomes false, then the node in
the
> > data
> > > >=C2=A0 =C2=A0 =C2=A0 =C2=A0tree with the "when"= ; expression is deleted by the server.
> > >
> > > Right. But the request won't modify a configuration data= node
because
> > > it is rejected. So the premise of the above implication does= n't
hold,
> > > and the conclusion doesn't apply.
> >
> > With the same logic you can claim conformance if you reject a
request to
> > create nodes under a case if another case is active.=C2=A0 I thin= k it is
quite
> > clear that this auto-deletion is part of the spec, and something<= br> clients
> > can rely on.=C2=A0 If the intention had been that this was option= al to
> > implement, it would have been clearly stated, and there would hav= e
been
> > mechanism present for clients to detect this.
> >
> I don't like the 'when' behaviour, I would have rather tha= t clients
were
> forced to delete the configuration explicitly (or pass an option for an
> implicit delete).

I hear the opposite from customers.
They insist that the server implement every last detail of the
machine-readable YANG,
especially when-stmt auto-deletion. The auto-cleanup is seen as a
feature.

> However, I do agree with Martin & Juergen, that the intent of the = spec
is
> that servers perform the 'when' auto-delete behaviour, and cli= ents
must be
> able to rely on compliant servers behaving this way.
>

agreed.
It is hard to argue against consistent, predicable server behavior
for datastore editing.=C2=A0 (NP containers and NMDA are also causing
problems,
and should be fixed in yang-next if that ever happens).

<tp>

Andy

This caught my eye.=C2=A0 What is the problem with NMDA? Anything specific?=

My own problem is that it is different to what has been proposed as
suitable for the previous 12 years but I doubt if many customers would
think that.


My comments are in the context of oper= ator expectations for consistent implementations.

= The first problem with NMDA is the new YANG library.
There is an = assumption that the client can and will change from an architecture
where there is 1 schema tree per server to an architecture where there c= an be a completely
different schema tree for configuration vs ope= rational datastores.=C2=A0 There is no such desire
or willingness= on the client side to properly address this complexity. IMO NMDA is going = to
need to function without this complexity. The benefits of <= operational> are not hindered
at all (in a properly implemente= d server) if /yang-library is left out.

The IETF h= as completely punted the problem of converting data for a configuration dat= astore
to the schema tree for <operational>. Deviations may= be different.=C2=A0 A leaf may
be string in 1 tree and decimal64= in the other. There is an incorrect assumption
that software dev= elopers will deal with these corner-cases (correctly and consistently).

The other big problem is an untested NMDA transition = strategy that is not well understood by vendors.
Should non-NMDA = (/foo-state) be visible to <get-data> or just <get>?
= Using the YANG library to separate the modules relies on the assumption tha= t
the client is capable of managing each datastore independently = (instead of 1 schema tree per server).


<= blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-l= eft:1px solid rgb(204,204,204);padding-left:1ex">
Tom Petch


Andy
=C2=A0
Thanks,
> Rob
>
>

Andy


>
> >
> > /martin
> > _______________________________________________
> > netmod mailing list
> > netmod@ietf.= org
> > https://www.ietf.org/mailman/listinfo/netmod
> _______________________________________________

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APXvYqwgoSkQmAb8sOxH1FsLwl+ZXh5VZ7t6Z2IZcKSlqOyDJ22lMqfIctS8KSD7nBmnETxySGEN27h0R+2uUEkA1Lo= X-Received: by 2002:a2e:8684:: with SMTP id l4mr1182583lji.116.1569555757577; Thu, 26 Sep 2019 20:42:37 -0700 (PDT) MIME-Version: 1.0 References: <87h84z4kmw.fsf@nic.cz> <20190926.085644.1268671875357328723.mbj@tail-f.com> <9bc06f9f3f1c87c79ccce4e1c4d40755c804875a.camel@nic.cz> <20190926.094526.272771637371098799.mbj@tail-f.com> <01c701d57485$400d8d40$4001a8c0@gateway.2wire.net> <20190926183514.6jxnybluwdubrzvy@anna.jacobs.jacobs-university.de> In-Reply-To: <20190926183514.6jxnybluwdubrzvy@anna.jacobs.jacobs-university.de> From: Andy Bierman Date: Thu, 26 Sep 2019 20:42:26 -0700 Message-ID: To: =?UTF-8?B?U2Now7Zud8OkbGRlciwgSsO8cmdlbg==?= Cc: tom petch , "netmod@ietf.org" Content-Type: multipart/alternative; boundary="00000000000062d09d059380ad27" Archived-At: Subject: Re: [netmod] =?utf-8?q?What=27s_the_problem_with_NMDA=3F_was_Re=3A_?= =?utf-8?b?562U5aSNOiDnrZTlpI06IFBsZWFzZSBjbGFyaWZ5IGltcGxlbWVudGF0aW9u?= =?utf-8?b?IGFib3V0IOKAmHdoZW7igJk=?= X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 27 Sep 2019 03:42:43 -0000 --00000000000062d09d059380ad27 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Thu, Sep 26, 2019 at 11:35 AM Sch=C3=B6nw=C3=A4lder, J=C3=BCrgen < J.Schoenwaelder@jacobs-university.de> wrote: > On Thu, Sep 26, 2019 at 10:44:01AM -0700, Andy Bierman wrote: > > > The IETF has completely punted the problem of converting data for a > > configuration datastore to the schema tree for . > > I am not sure. The model consists of the applied > configuration plus any config false extras. NMDA simplifies things > since there is now a single tree structure instead of two if you have > to handle models where applied configuration can be different than > intended config. If I configure /foo/bar in , I can check > /foo/bar in whether it exists and matches what I > configured. > > > Deviations may be different. A leaf may be string in 1 tree and > > decimal64 in the other. There is an incorrect assumption that > > software developers will deal with these corner-cases (correctly and > > consistently). > > Not really true for applied config. And with non NMDA, there is no > guarantee either that /foo/bar and /foo-state/bar use the same type > and semantics. > > different deviation modules in each module-set are allowed in the YANG library. That makes it kind of mandatory for the client to support it, or choose to not conform to the standard. > The other big problem is an untested NMDA transition strategy that is not > > well understood by vendors. > > Should non-NMDA (/foo-state) be visible to or just ? > > Perhaps there is more explanation necessary. The idea here is that an > NMDA client should not bother to search for /foo-state, it should send > a for /foo/state in operational. > > Yes, NMDA requires updates to clients. Whether these are visible or in > which form they are visible to application logic likely depends on the > client design. But yes, NMDA is not for free for clients. But once you > have updated, we believe NMDA actually makes things simpler and more > consistent. > > > Using the YANG library to separate the modules relies on the assumption > that > > the client is capable of managing each datastore independently (instead > of > > 1 schema tree per server). > > Yes, YANG library can express pretty complex server model > organizations. This does not mean that all server have to use server > model organizations. I assume that also many clients will not be > interested to understand the entire server model, they likely want to > check the existance of only those pieces that they care about. > > I am not trying to revive debates on the value of NMDA or the solution, but more flexibility for the server means more complexity for the client. IMO this is contributing to the slow adoption of NMDA. I hope the industry will find a transition solution (NMDA Lite) that fully supports the protocol operations, but uses the same module-set(s) in the YANG librar= y for all datastores. If this is the expected norm for servers then clients that support it will work. (I would like to hear about even one NMDA implementation that supports complex YANG libraries). /js > Andy > > -- > Juergen Schoenwaelder Jacobs University Bremen gGmbH > Phone: +49 421 200 3587 Campus Ring 1 | 28759 Bremen | Germany > Fax: +49 421 200 3103 > --00000000000062d09d059380ad27 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable


=
On Thu, Sep 26, 2019 at 11:35 AM Sch= =C3=B6nw=C3=A4lder, J=C3=BCrgen <J.Schoenwaelder@jacobs-university.de> wrote:
On Thu, Sep 26, 2019 a= t 10:44:01AM -0700, Andy Bierman wrote:

> The IETF has completely punted the problem of converting data for a > configuration datastore to the schema tree for <operational>.
I am not sure. The <operational> model consists of the applied
configuration plus any config false extras. NMDA simplifies things
since there is now a single tree structure instead of two if you have
to handle models where applied configuration can be different than
intended config. If I configure /foo/bar in <running>, I can check /foo/bar in <operational> whether it exists and matches what I
configured.

> Deviations may be different.=C2=A0 A leaf may be string in 1 tree and<= br> > decimal64 in the other. There is an incorrect assumption that
> software developers will deal with these corner-cases (correctly and > consistently).

Not really true for applied config. And with non NMDA, there is no
guarantee either that /foo/bar and /foo-state/bar use the same type
and semantics.



different deviation mod= ules in each module-set are allowed in the YANG library.
That mak= es it kind of mandatory for the client to support it, or choose to
not conform to the standard.



=

> The other big problem is an untested NMDA transition strategy that is = not
> well understood by vendors.
> Should non-NMDA (/foo-state) be visible to <get-data> or just &l= t;get>?

Perhaps there is more explanation necessary. The idea here is that an
NMDA client should not bother to search for /foo-state, it should send
a <get> for /foo/state in operational.

Yes, NMDA requires updates to clients. Whether these are visible or in
which form they are visible to application logic likely depends on the
client design. But yes, NMDA is not for free for clients. But once you
have updated, we believe NMDA actually makes things simpler and more
consistent.

> Using the YANG library to separate the modules relies on the assumptio= n that
> the client is capable of managing each datastore independently (instea= d of
> 1 schema tree per server).

Yes, YANG library can express pretty complex server model
organizations.=C2=A0 This does not mean that all server have to use server<= br> model organizations.=C2=A0 I assume that also many clients will not be
interested to understand the entire server model, they likely want to
check the existance of only those pieces that they care about.


I am not trying to revive debates on t= he value of NMDA or the solution,
but more flexibility for the se= rver means more complexity for the client.
IMO this is contributi= ng to the slow adoption of NMDA.

I hope the indust= ry will find a transition solution (NMDA Lite) that fully supports
the protocol operations, but uses the same module-set(s) in the YANG libr= ary
for all datastores.=C2=A0 If this is the expected norm for se= rvers then clients that support it
will work.=C2=A0 (I would like= to hear about even one NMDA implementation
that supports complex= YANG libraries).


/js

Andy
=C2=A0

--
Juergen Schoenwaelder=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Jacobs Univer= sity Bremen gGmbH
Phone: +49 421 200 3587=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Campus Ring 1 | 28= 759 Bremen | Germany
Fax:=C2=A0 =C2=A0+49 421 200 3103=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0<https://www.jacobs-university.de/>
--00000000000062d09d059380ad27-- From nobody Thu Sep 26 22:21:32 2019 Return-Path: X-Original-To: netmod@ietfa.amsl.com Delivered-To: netmod@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 51076120024 for ; Thu, 26 Sep 2019 22:21:31 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -6.898 X-Spam-Level: X-Spam-Status: No, score=-6.898 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_HI=-5, SPF_HELO_NONE=0.001, SPF_NONE=0.001] autolearn=ham autolearn_force=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id fKZ3Pu7kx0mm for ; Thu, 26 Sep 2019 22:21:29 -0700 (PDT) Received: from nagasaki.bogus.com (nagasaki.bogus.com [IPv6:2001:418:1::81]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 1E43A120018 for ; Thu, 26 Sep 2019 22:21:29 -0700 (PDT) Received: from [192.168.0.107] (c-73-202-177-209.hsd1.ca.comcast.net [73.202.177.209]) (authenticated bits=0) by nagasaki.bogus.com (8.15.2/8.15.2) with ESMTPSA id x8R5LLwb049760 for ; Fri, 27 Sep 2019 05:21:28 GMT (envelope-from joelja@bogus.com) X-Authentication-Warning: nagasaki.bogus.com: Host c-73-202-177-209.hsd1.ca.comcast.net [73.202.177.209] claimed to be [192.168.0.107] From: Joel Jaeggli Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.11\)) Message-Id: Date: Thu, 26 Sep 2019 22:21:16 -0700 To: NETMOD Working Group X-Mailer: Apple Mail (2.3445.104.11) Archived-At: Subject: [netmod] Upcoming important Dates leading to IETF 106 X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 27 Sep 2019 05:21:31 -0000 Folks,=20 It's worth noting that there are several important upcoming dates = between the present and IETF 106 November 16-22 2019. The early bird deadline for registration is this coming Monday, = September 30th. October 18th is publication of the initial agenda November 4th is Draft submission cutoff November 6th the chairs have to publish the initial meeting agenda. These are dates that we are going to be working towards and around for = currently in the queue documents as well as new work. Thanks The NETMOD Chairs= From nobody Thu Sep 26 22:32:30 2019 Return-Path: X-Original-To: netmod@ietfa.amsl.com Delivered-To: netmod@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id C18B8120020 for ; Thu, 26 Sep 2019 22:32:29 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -6.896 X-Spam-Level: X-Spam-Status: No, score=-6.896 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_HI=-5, SPF_HELO_NONE=0.001, SPF_NONE=0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id a3tb61uTW71W for ; Thu, 26 Sep 2019 22:32:28 -0700 (PDT) Received: from nagasaki.bogus.com (nagasaki.bogus.com [IPv6:2001:418:1::81]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 49EA8120018 for ; Thu, 26 Sep 2019 22:32:28 -0700 (PDT) Received: from [192.168.0.107] (c-73-202-177-209.hsd1.ca.comcast.net [73.202.177.209]) (authenticated bits=0) by nagasaki.bogus.com (8.15.2/8.15.2) with ESMTPSA id x8R5WQfQ049897 for ; Fri, 27 Sep 2019 05:32:27 GMT (envelope-from joelja@bogus.com) X-Authentication-Warning: nagasaki.bogus.com: Host c-73-202-177-209.hsd1.ca.comcast.net [73.202.177.209] claimed to be [192.168.0.107] From: Joel Jaeggli Content-Type: multipart/alternative; boundary="Apple-Mail=_1B3F58A6-90E6-45F7-8E6A-F81BB98DD4A1" Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.11\)) Message-Id: Date: Thu, 26 Sep 2019 22:32:21 -0700 To: NETMOD Working Group X-Mailer: Apple Mail (2.3445.104.11) Archived-At: Subject: [netmod] WG Last Call: draft-ietf-netmod-yang-data-ext version 4 X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 27 Sep 2019 05:32:30 -0000 --Apple-Mail=_1B3F58A6-90E6-45F7-8E6A-F81BB98DD4A1 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii All, This starts a two week working group last call for = draft-ietf-netmod-yang-data-ext-04 The working group last call ends on Friday October 11th 2019. Please = send your comments to the working group mailing list. Positive comments, e.g., "I've reviewed this document and believe it is = ready for publication", are welcome! This is useful and important, even = from authors. https://tools.ietf.org/html/draft-ietf-netmod-yang-data-ext-04 = The diff from 03, produced prior to IETF 105 is available here: = https://tools.ietf.org/rfcdiff?difftype=3D--hwdiff&url2=3Ddraft-ietf-netmo= d-yang-data-ext-04.txt = Thanks Joel --Apple-Mail=_1B3F58A6-90E6-45F7-8E6A-F81BB98DD4A1 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=us-ascii All,

This starts a two week working group = last call for  draft-ietf-netmod-yang-data-ext-04

The working group last call ends on  Friday October = 11th 2019.  Please send your comments to the working group mailing = list.

Positive comments, e.g., "I've reviewed this document = and believe it is ready for publication", are welcome!  This is = useful and important, even from authors.

https://tools.ietf.org/html/draft-ietf-netmod-yang-data-ext-04<= /a>

The diff from 03, produced prior to IETF 105 = is available here:

https://tools.ietf.org/rfcdiff?difftype=3D--hwdiff&url2=3Dd= raft-ietf-netmod-yang-data-ext-04.txt

Thanks
Joel

= --Apple-Mail=_1B3F58A6-90E6-45F7-8E6A-F81BB98DD4A1-- From nobody Thu Sep 26 22:35:58 2019 Return-Path: X-Original-To: netmod@ietfa.amsl.com Delivered-To: netmod@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id B8D97120020; Thu, 26 Sep 2019 22:35:56 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -6.896 X-Spam-Level: X-Spam-Status: No, score=-6.896 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_HI=-5, SPF_HELO_NONE=0.001, SPF_NONE=0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id z6DtE-kHYW7S; Thu, 26 Sep 2019 22:35:55 -0700 (PDT) Received: from nagasaki.bogus.com (nagasaki.bogus.com [IPv6:2001:418:1::81]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 2B9AF120018; Thu, 26 Sep 2019 22:35:55 -0700 (PDT) Received: from [192.168.0.107] (c-73-202-177-209.hsd1.ca.comcast.net [73.202.177.209]) (authenticated bits=0) by nagasaki.bogus.com (8.15.2/8.15.2) with ESMTPSA id x8R5Zl7Y049970; Fri, 27 Sep 2019 05:35:54 GMT (envelope-from joelja@bogus.com) X-Authentication-Warning: nagasaki.bogus.com: Host c-73-202-177-209.hsd1.ca.comcast.net [73.202.177.209] claimed to be [192.168.0.107] From: Joel Jaeggli Content-Type: multipart/alternative; boundary="Apple-Mail=_1A59CA05-054A-4433-B31C-5EF1C0413DE4" Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.11\)) Message-Id: <0A8BA26B-DA93-458C-86B6-EA231855C490@bogus.com> Date: Thu, 26 Sep 2019 22:35:42 -0700 Cc: draft-ietf-netmod-yang-data-ext@ietf.org, NetMod WG Chairs To: NETMOD Working Group X-Mailer: Apple Mail (2.3445.104.11) Archived-At: Subject: [netmod] IPR check draft-ietf-netmod-yang-data-ext-04 X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 27 Sep 2019 05:35:57 -0000 --Apple-Mail=_1A59CA05-054A-4433-B31C-5EF1C0413DE4 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii Authors, Contributors, WG, As part of WG Last Call for draft-ietf-netmod-yang-data-ext-04 Are you aware of any IPR that applies to drafts identified above? Please state either: "No, I'm not aware of any IPR that applies to this draft" or "Yes, I'm aware of IPR that applies to this draft" If so, has this IPR been disclosed in compliance with IETF IPR rules (see RFCs 3669, 5378 and 8179 for more details)? If yes to the above, please state either: "Yes, the IPR has been disclosed in compliance with IETF IPR rules" or "No, the IPR has not been disclosed" If you answer no, please provide any additional details you think appropriate. If you are listed as a document author or contributor please answer the above by responding to this email regardless of whether or not you are aware of any relevant IPR. This document will not advance to the next stage until a response has been received from each author and listed contributor. NOTE: THIS APPLIES TO ALL OF YOU LISTED IN THIS MESSAGE'S TO LINES. If you are on the WG email list or attend WG meetings but are not listed as an author or contributor, we remind you of your obligations under the IETF IPR rules which encourages you to notify the IETF if you are aware of IPR of others on an IETF contribution, or to refrain from participating in any contribution or discussion related to your undisclosed IPR. For more information, please see the RFCs listed above and http://trac.tools.ietf.org/group/iesg/trac/wiki/IntellectualProperty = . Thank you, NetMod WG Chairs PS Please include all listed in the headers of this message in your response. --Apple-Mail=_1A59CA05-054A-4433-B31C-5EF1C0413DE4 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=us-ascii Authors, Contributors, WG,

As part of WG Last Call = for  draft-ietf-netmod-yang-data-ext-04

Are = you aware of any IPR that applies to drafts identified above?

Please state either:

"No, I'm not aware of any = IPR that applies to this draft"
or
"Yes, I'm aware of IPR that applies to this draft"

If = so, has this IPR been disclosed in compliance with IETF IPR = rules
(see RFCs 3669, 5378 and 8179 for more = details)?

If yes to the above, please state either:

"Yes, the IPR has been disclosed in compliance with IETF IPR = rules"
or
"No, the IPR has not been = disclosed"

If you answer no, please provide any = additional details you think
appropriate.

If = you are listed as a document author or contributor please answer = the
above by responding to this email regardless of whether = or not you are
aware of any relevant IPR. This = document will not advance to the next
stage until a response = has been received from each author and listed
contributor. NOTE: THIS APPLIES TO ALL OF YOU LISTED IN THIS = MESSAGE'S
TO LINES.

If you are on the WG email list = or attend WG meetings but are not listed
as an author or = contributor, we remind you of your obligations under
the = IETF IPR rules which encourages you to notify the IETF if you = are
aware of IPR of others on an IETF contribution, or to = refrain from
participating in any contribution or = discussion related to your
undisclosed IPR. For more = information, please see the RFCs listed above
and
http://trac.tools.ietf.org/group/iesg/trac/wiki/IntellectualPro= perty.

Thank you,
NetMod WG = Chairs

PS Please include all listed in the headers of this = message in your
response.

= --Apple-Mail=_1A59CA05-054A-4433-B31C-5EF1C0413DE4-- From nobody Thu Sep 26 23:50:35 2019 Return-Path: X-Original-To: netmod@ietfa.amsl.com Delivered-To: netmod@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id C1E6B12003F; Thu, 26 Sep 2019 23:50:33 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.899 X-Spam-Level: X-Spam-Status: No, score=-1.899 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id M-IuUThpkHqC; Thu, 26 Sep 2019 23:50:31 -0700 (PDT) Received: from mail.tail-f.com (mail.tail-f.com [46.21.102.45]) by ietfa.amsl.com (Postfix) with ESMTP id 6B5E91200C1; Thu, 26 Sep 2019 23:50:31 -0700 (PDT) Received: from localhost (h-46-233.A165.priv.bahnhof.se [46.59.46.233]) by mail.tail-f.com (Postfix) with ESMTPSA id 7137C1AE0115; Fri, 27 Sep 2019 08:50:29 +0200 (CEST) Date: Fri, 27 Sep 2019 08:50:29 +0200 (CEST) Message-Id: <20190927.085029.1161992144106817463.mbj@tail-f.com> To: joelja@bogus.com Cc: netmod@ietf.org, draft-ietf-netmod-yang-data-ext@ietf.org, netmod-chairs@ietf.org From: Martin Bjorklund In-Reply-To: <0A8BA26B-DA93-458C-86B6-EA231855C490@bogus.com> References: <0A8BA26B-DA93-458C-86B6-EA231855C490@bogus.com> X-Mailer: Mew version 6.7 on Emacs 25.2 / Mule 6.0 (HANACHIRUSATO) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Archived-At: Subject: Re: [netmod] IPR check draft-ietf-netmod-yang-data-ext-04 X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 27 Sep 2019 06:50:34 -0000 Joel Jaeggli wrote: > Authors, Contributors, WG, > > As part of WG Last Call for draft-ietf-netmod-yang-data-ext-04 > > Are you aware of any IPR that applies to drafts identified above? No, I'm not aware of any IPR that applies to this draft /martin > > Please state either: > > "No, I'm not aware of any IPR that applies to this draft" > or > "Yes, I'm aware of IPR that applies to this draft" > > If so, has this IPR been disclosed in compliance with IETF IPR rules > (see RFCs 3669, 5378 and 8179 for more details)? > > If yes to the above, please state either: > > "Yes, the IPR has been disclosed in compliance with IETF IPR rules" > or > "No, the IPR has not been disclosed" > > If you answer no, please provide any additional details you think > appropriate. > > If you are listed as a document author or contributor please answer the > above by responding to this email regardless of whether or not you are > aware of any relevant IPR. This document will not advance to the next > stage until a response has been received from each author and listed > contributor. NOTE: THIS APPLIES TO ALL OF YOU LISTED IN THIS MESSAGE'S > TO LINES. > > If you are on the WG email list or attend WG meetings but are not listed > as an author or contributor, we remind you of your obligations under > the IETF IPR rules which encourages you to notify the IETF if you are > aware of IPR of others on an IETF contribution, or to refrain from > participating in any contribution or discussion related to your > undisclosed IPR. For more information, please see the RFCs listed above > and > http://trac.tools.ietf.org/group/iesg/trac/wiki/IntellectualProperty . > > Thank you, > NetMod WG Chairs > > PS Please include all listed in the headers of this message in your > response. > From nobody Fri Sep 27 03:06:16 2019 Return-Path: X-Original-To: netmod@ietfa.amsl.com Delivered-To: netmod@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 245A4120113 for ; Fri, 27 Sep 2019 03:06:14 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: 0.222 X-Spam-Level: X-Spam-Status: No, score=0.222 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, RATWARE_MS_HASH=2.148, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.026, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=no autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1024-bit key) header.d=btconnect.onmicrosoft.com 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b=BXkUoUcWWFDQj8oxb9Rue6L5BT72j/88URwFbxCdQzR+qnqqWxybNBYCV4cFTTskE8OHVxudRhdiR/YxR85AYFCotiIwhph3EK7DnHvc5wE7Lo3sdn4P4XkfFdtJvVtumeqTUbdZdW6RKUK4kCnnUtHjnIv99blVzRzL2zhcBm4= Received: from AM0PR07MB5940.eurprd07.prod.outlook.com (20.178.23.32) by AM0PR07MB6129.eurprd07.prod.outlook.com (20.178.115.31) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2305.15; Fri, 27 Sep 2019 10:06:08 +0000 Received: from AM0PR07MB5940.eurprd07.prod.outlook.com ([fe80::6091:ebf9:c327:1c60]) by AM0PR07MB5940.eurprd07.prod.outlook.com ([fe80::6091:ebf9:c327:1c60%5]) with mapi id 15.20.2305.017; Fri, 27 Sep 2019 10:06:08 +0000 From: tom petch To: Andy Bierman CC: "netmod@ietf.org" Thread-Topic: =?utf-8?B?V2hhdCdzIHRoZSBwcm9ibGVtIHdpdGggTk1EQT8gd2FzIFJlOiBbbmV0bW9k?= =?utf-8?B?XSDnrZTlpI06IOetlOWkjTogUGxlYXNlIGNsYXJpZnkgaW1wbGVtZW50YXRp?= =?utf-8?B?b24gYWJvdXQg4oCYd2hlbuKAmQ==?= Thread-Index: AQHVdRsui+z1X74d5kGqOVr2DkzJuQ== Date: Fri, 27 Sep 2019 10:06:08 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bmNlIG9mIG9ubHkgdGhvc2UNCj4gcGllY2VzIHRoYXQgdGhleSBjYXJlIGFib3V0Lg0KPiANCj4g L2pzDQo+IA0KPiAtLQ0KPiBKdWVyZ2VuIFNjaG9lbndhZWxkZXIgICAgICAgICAgIEphY29icyBV bml2ZXJzaXR5IEJyZW1lbiBnR21iSA0KPiBQaG9uZTogKzQ5IDQyMSAyMDAgMzU4NyAgICAgICAg IENhbXB1cyBSaW5nIDEgfCAyODc1OSBCcmVtZW4gfCBHZXJtYW55DQo+IEZheDogICArNDkgNDIx IDIwMCAzMTAzICAgICAgICAgPGh0dHBzOi8vd3d3LmphY29icy11bml2ZXJzaXR5LmRlLz4NCj4g X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18NCj4gbmV0bW9k IG1haWxpbmcgbGlzdA0KPiBuZXRtb2RAaWV0Zi5vcmcNCj4gaHR0cHM6Ly93d3cuaWV0Zi5vcmcv bWFpbG1hbi9saXN0aW5mby9uZXRtb2QNCg== From nobody Fri Sep 27 04:47:57 2019 Return-Path: <0100016d728c76d7-615045cb-33d1-48d3-85cf-2e4a88125b00-000000@amazonses.watsen.net> X-Original-To: netmod@ietfa.amsl.com Delivered-To: netmod@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 76C7012011E; Fri, 27 Sep 2019 04:47:55 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.895 X-Spam-Level: X-Spam-Status: No, score=-1.895 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, HTML_MESSAGE=0.001, MIME_QP_LONG_LINE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_NONE=0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1024-bit key) header.d=amazonses.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id KjUkYCsbEPtS; Fri, 27 Sep 2019 04:47:53 -0700 (PDT) Received: from a8-96.smtp-out.amazonses.com (a8-96.smtp-out.amazonses.com [54.240.8.96]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 9D31212004F; Fri, 27 Sep 2019 04:47:52 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/simple; s=6gbrjpgwjskckoa6a5zn6fwqkn67xbtw; d=amazonses.com; t=1569584871; h=Content-Type:Mime-Version:Subject:From:In-Reply-To:Date:Cc:Content-Transfer-Encoding:Message-Id:References:To:Feedback-ID; bh=/ZkBe20wNfeWbqL/Bv1zYQCJXtFDuYkAt9NhOYT+Nik=; b=Su314QneeYOk94b6rkHaQGsRuzbUPkH4Tz5jx5Ph/o8fKRpXzXN7fe8IcJtTk5ub u9sNT0k9pgA1Cr4sJszdKjHUekvgAAN5oLeKuuKccywFVb0V1FkwPbSV0qYyVC6mRdS GhyJ7gNw7O/8gAGWiK6+3dKSR9dtvphYKd0tT9RU= Content-Type: multipart/alternative; boundary=Apple-Mail-13BCA6E4-B96D-4DA3-B168-8E444BEBDBB9 Mime-Version: 1.0 (1.0) From: Kent Watsen X-Mailer: iPhone Mail (16G102) In-Reply-To: <0A8BA26B-DA93-458C-86B6-EA231855C490@bogus.com> Date: Fri, 27 Sep 2019 11:47:51 +0000 Cc: NETMOD Working Group , NetMod WG Chairs , draft-ietf-netmod-yang-data-ext@ietf.org Content-Transfer-Encoding: 7bit Message-ID: <0100016d728c76d7-615045cb-33d1-48d3-85cf-2e4a88125b00-000000@email.amazonses.com> References: <0A8BA26B-DA93-458C-86B6-EA231855C490@bogus.com> To: Joel Jaeggli X-SES-Outgoing: 2019.09.27-54.240.8.96 Feedback-ID: 1.us-east-1.DKmIRZFhhsBhtmFMNikgwZUWVrODEw9qVcPhqJEI2DA=:AmazonSES Archived-At: Subject: Re: [netmod] IPR check draft-ietf-netmod-yang-data-ext-04 X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 27 Sep 2019 11:47:56 -0000 --Apple-Mail-13BCA6E4-B96D-4DA3-B168-8E444BEBDBB9 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit No, I'm not aware of any IPR that applies to this draft. Kent // as co-author > On Sep 27, 2019, at 1:35 AM, Joel Jaeggli wrote: > > Authors, Contributors, WG, > > As part of WG Last Call for draft-ietf-netmod-yang-data-ext-04 > > Are you aware of any IPR that applies to drafts identified above? > > Please state either: > > "No, I'm not aware of any IPR that applies to this draft" > or > "Yes, I'm aware of IPR that applies to this draft" > > If so, has this IPR been disclosed in compliance with IETF IPR rules > (see RFCs 3669, 5378 and 8179 for more details)? > > If yes to the above, please state either: > > "Yes, the IPR has been disclosed in compliance with IETF IPR rules" > or > "No, the IPR has not been disclosed" > > If you answer no, please provide any additional details you think > appropriate. > > If you are listed as a document author or contributor please answer the > above by responding to this email regardless of whether or not you are > aware of any relevant IPR. This document will not advance to the next > stage until a response has been received from each author and listed > contributor. NOTE: THIS APPLIES TO ALL OF YOU LISTED IN THIS MESSAGE'S > TO LINES. > > If you are on the WG email list or attend WG meetings but are not listed > as an author or contributor, we remind you of your obligations under > the IETF IPR rules which encourages you to notify the IETF if you are > aware of IPR of others on an IETF contribution, or to refrain from > participating in any contribution or discussion related to your > undisclosed IPR. For more information, please see the RFCs listed above > and > http://trac.tools.ietf.org/group/iesg/trac/wiki/IntellectualProperty. > > Thank you, > NetMod WG Chairs > > PS Please include all listed in the headers of this message in your > response. > > _______________________________________________ > netmod mailing list > netmod@ietf.org > https://www.ietf.org/mailman/listinfo/netmod --Apple-Mail-13BCA6E4-B96D-4DA3-B168-8E444BEBDBB9 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable No, I'm not aware of any IPR that applies to this draft. =

Kent // as co-author 



On Sep 27, 2019, at 1:35 AM, Joel Jaeggli &= lt;joelja@bogus.com> wrote:
Authors, Contributors, WG,=

= A= s part of WG Last Call for  <= span style=3D"caret-color: rgb(0, 0, 0);" class=3D"">draft-ietf-netmod-yang-= data-ext-04

Are you aware of any IPR that applies to drafts identified a= bove?

Please state either:

"No, I'm not aware of any IPR that applies to this dr= aft"
or
"Yes, I'm aware of IPR that applies to this draft"

If so, has this I= PR been disclosed in compliance with IETF IPR rules
(see RFCs 3669, 5378 a= nd 8179 for more details)?

If yes to the above, please state either:
"Yes, the I= PR has been disclosed in compliance with IETF IPR rules"
or
"No, the IPR= has not been disclosed"

If you answer no, please provide any additional deta= ils you think
appropriate.

If you are listed as a document author or contrib= utor please answer the
above by responding to this email regardless of whet= her or not you are
aware of any relevant IPR. This document will not advan= ce to the next
stage until a response has been received from each author a= nd listed
contributor. NOTE: THIS APPLIES TO ALL OF YOU LISTED IN THIS MES= SAGE'S
TO LINES.

If you are on the WG email list or attend WG meetings but a= re not listed
as an author or contributor, we remind you of your obligation= s under
the IETF IPR rules which encourages you to notify the IETF if you a= re
aware of IPR of others on an IETF contribution, or to refrain from=
part= icipating in any contribution or discussion related to your
undisclosed IPR.= For more information, please see the RFCs listed above
and
http://trac.tools.ietf.org/group/iesg/trac/wiki/IntellectualProperty<= span style=3D"caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);" class=3D"">.<= /span>

= T= hank you,
NetMod WG Chairs

PS Please include all listed in the headers of t= his message in your
response.

_______________________________________________
netmod mailing list
netmod@ietf.org
https://www.ietf.org/mailman/listinfo/netmod
= --Apple-Mail-13BCA6E4-B96D-4DA3-B168-8E444BEBDBB9-- From nobody Fri Sep 27 05:58:09 2019 Return-Path: X-Original-To: netmod@ietfa.amsl.com Delivered-To: netmod@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 74617120815 for ; Fri, 27 Sep 2019 05:58:08 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.898 X-Spam-Level: X-Spam-Status: No, score=-1.898 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=unavailable autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=yumaworks-com.20150623.gappssmtp.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id lrhEaYfoxloT for ; Fri, 27 Sep 2019 05:58:05 -0700 (PDT) Received: from mail-lf1-x143.google.com (mail-lf1-x143.google.com [IPv6:2a00:1450:4864:20::143]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 327001200DF for ; Fri, 27 Sep 2019 05:58:05 -0700 (PDT) Received: by mail-lf1-x143.google.com with SMTP id q11so1832261lfc.11 for ; Fri, 27 Sep 2019 05:58:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yumaworks-com.20150623.gappssmtp.com; s=20150623; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=gwsKPOIMk8L8irNCcLqVHhqjdw+GMMBFtxh9/SUtcrg=; b=ewfrVx+obK0lvCK7+QgvfvPDsvDzwr77kOmy6TKNOq3pfO3pnmdw8OKaoQA4SQh1qN qxDw3vw3AMv7rYxVCSRAeKQoR3Sx2VEPMLa6mBQi8jc30A/1Dn5u/XxThry54HrsDBKp lz2jk2RPf2xJXHsTXuxIMnhyhgGrELtBwl7Yez+gYO9n+VISK3q1mOmhjvJV+23L4oxo h1r427KCxwIAZnYWO8vGqnwvEZYn2V2X4CeLh/EYOij+xrAn9LwI6wIK8/Fyx+wKtv5y z4q4MH+got2vdxt05C0pucLatLa81cGKtRr9LhP6A+HPT8hT3xPbFW/k4ee0xb7u5Lq0 XEsw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=gwsKPOIMk8L8irNCcLqVHhqjdw+GMMBFtxh9/SUtcrg=; b=J7d9YnRlu4k9ijH14iWwwcKewHKb9l8Sv3EtuQJR3K9FHa+ER1spRiwQtijTSOxiuN H/hEcd+scy9jjwQS4HyCsRzOSNgd9j56i9P1o0+chYu+fmiQ+eLWSx9D5bbUMhcwIF1Y +I4ShO8Vbu7UXepiVEJ4PjXFEcohdHN8KaQxfG9uSQnYKDcYU6iogDnhe8bTaMKKwBM1 ClzyNQkjBosxo+UPQth7zM32Le2fLPzAvP9GmqRXQEqJije69yGKJJrbE/ocU0x0ujBH VXV3WaX0sRKOONCUUVicF/NngQNiNXAdJzkfSYEEXkaCf8lZSsCUbhbI8HljcrQwa8j7 jH5Q== X-Gm-Message-State: APjAAAX16LN50tzoRvPr/HZmSBVn5bG+BrB3sdIOzfG9ckfCE0/BG8dz /TAukg/b/IJ7TX+FwqmGTe6s6uevMiJHJ4pnbVqi2DrHrSc= X-Google-Smtp-Source: APXvYqyEh11HlV/OW6IuqLMzGEd/dermjh/4O6NkscUxLxW9g4PPzFOf7uT1FPN3qrm4l8H/2ZZjh/5tvqwabjh7u4Q= X-Received: by 2002:ac2:46f8:: with SMTP id q24mr2712504lfo.51.1569589083314; Fri, 27 Sep 2019 05:58:03 -0700 (PDT) MIME-Version: 1.0 References: <0A8BA26B-DA93-458C-86B6-EA231855C490@bogus.com> In-Reply-To: <0A8BA26B-DA93-458C-86B6-EA231855C490@bogus.com> From: Andy Bierman Date: Fri, 27 Sep 2019 05:57:50 -0700 Message-ID: To: Joel Jaeggli Cc: NETMOD Working Group , draft-ietf-netmod-yang-data-ext@ietf.org, NetMod WG Chairs Content-Type: multipart/alternative; boundary="000000000000c135d30593886f8b" Archived-At: Subject: Re: [netmod] IPR check draft-ietf-netmod-yang-data-ext-04 X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 27 Sep 2019 12:58:09 -0000 --000000000000c135d30593886f8b Content-Type: text/plain; charset="UTF-8" On Thu, Sep 26, 2019 at 10:35 PM Joel Jaeggli wrote: > Authors, Contributors, WG, > > As part of WG Last Call for draft-ietf-netmod-yang-data-ext-04 > > Are you aware of any IPR that applies to drafts identified above? > > Please state either: > > "No, I'm not aware of any IPR that applies to this draft" Andy "No, I'm not aware of any IPR that applies to this draft" > or > "Yes, I'm aware of IPR that applies to this draft" > > If so, has this IPR been disclosed in compliance with IETF IPR rules > (see RFCs 3669, 5378 and 8179 for more details)? > > If yes to the above, please state either: > > "Yes, the IPR has been disclosed in compliance with IETF IPR rules" > or > "No, the IPR has not been disclosed" > > If you answer no, please provide any additional details you think > appropriate. > > If you are listed as a document author or contributor please answer the > above by responding to this email regardless of whether or not you are > aware of any relevant IPR. This document will not advance to the next > stage until a response has been received from each author and listed > contributor. NOTE: THIS APPLIES TO ALL OF YOU LISTED IN THIS MESSAGE'S > TO LINES. > > If you are on the WG email list or attend WG meetings but are not listed > as an author or contributor, we remind you of your obligations under > the IETF IPR rules which encourages you to notify the IETF if you are > aware of IPR of others on an IETF contribution, or to refrain from > participating in any contribution or discussion related to your > undisclosed IPR. For more information, please see the RFCs listed above > and > http://trac.tools.ietf.org/group/iesg/trac/wiki/IntellectualProperty. > > Thank you, > NetMod WG Chairs > > PS Please include all listed in the headers of this message in your > response. > > --000000000000c135d30593886f8b Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable


=
On Thu, Sep 26, 2019 at 10:35 PM Joel= Jaeggli <joelja@bogus.com> w= rote:
Authors, C= ontributors, WG,

As part of WG Last Call for =C2= =A0draft-ietf-netmod-yang-data-ext-04<= /span>

= Are you aware of any IPR that applies to d= rafts identified above?

Please state either:



=C2=A0"No, I'm not aware of any IPR that applies to this draft&qu= ot;

Andy

"No, I'm not aware of any IPR that applies to this draft&quo= t;
or=
&quo= t;Yes, I'm aware of IPR that applies to this draft"

If so, has this IPR been disclosed in compliance with IETF IPR = rules
(see RFCs 3669, 5378 and 8179 for more details)?

If yes to the above, please state either:

"= Yes, the IPR has been disclosed in compliance with IETF IPR rules"
or
"No, = the IPR has not been disclosed"
<= br style=3D"color:rgb(0,0,0)">If you answe= r no, please provide any additional details you think
appropriate.

If you are listed as a document author or contributor please a= nswer the
above by responding to this email regardless of whether or not you are=
awar= e of any relevant IPR. This document will not advance to the nextstage until a = response has been received from each author and listed
contributor. NOTE: THIS A= PPLIES TO ALL OF YOU LISTED IN THIS MESSAGE'S
TO LINES.

If you are on the WG email list or attend WG meetings but are not lis= ted
a= s an author or contributor, we remind you of your obligations under<= br style=3D"color:rgb(0,0,0)">the IETF IPR= rules which encourages you to notify the IETF if you are
aware of IPR of othe= rs on an IETF contribution, or to refrain from
participating in any contribution= or discussion related to your
undisclosed IPR. For more information, please see= the RFCs listed above
and
http://trac.tools.ietf.org/group/iesg/trac/wiki/IntellectualPropert= y.

Thank you= ,
Net= Mod WG Chairs

PS Please include all listed in the= headers of this message in your
response.
=
--000000000000c135d30593886f8b-- From nobody Fri Sep 27 06:01:29 2019 Return-Path: X-Original-To: netmod@ietfa.amsl.com Delivered-To: netmod@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 1A492120144; Fri, 27 Sep 2019 06:01:28 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.998 X-Spam-Level: X-Spam-Status: No, score=-1.998 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, HTML_MESSAGE=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1024-bit key) header.d=shytyi.net Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id PvvyHx9yC02E; Fri, 27 Sep 2019 06:01:25 -0700 (PDT) Received: from sender11-of-o52.zoho.eu (sender11-of-o52.zoho.eu [185.20.211.238]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 2609A1200DF; Fri, 27 Sep 2019 06:01:24 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1569589265; cv=none; d=zohomail.eu; s=zohoarc; b=Q08sgY8bZVUpv25dqT5XpGAVdrEaD+mDS2KQoTY1SO1e/f88PrY7EM/ccuVbNw5H6WPTDTjq8WcdgV8QYSAa+ERdEnMxM6YLaq19hssALvTDAPQKvAGO5TwZ/+GLYVxiMQMIlopV3lOjSDL06IqKbjkLENsivhjE5ODB3QpWwYk= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.eu; s=zohoarc; t=1569589265; h=Content-Type:Cc:Date:From:In-Reply-To:MIME-Version:Message-ID:References:Subject:To:ARC-Authentication-Results; bh=P5byFCN01PpDF2Iu63GNntyI50JtDOGgeGHEJfiFccM=; b=LIwvRwYsa1fEe8McXTxx5QUG2R+aVECpVG3tF4Qo6qpzvY3LK3y/O/ulP5oVnhD9wZERcE+Y0racbAtyqup+IXErPl7xJ1whKpU/m369JUlcwHnrkv7JH2K4pozw32q4f1b/wdKKrp5kleMc/YV0nDMtF4ppZXem5+1luQ1WUFc= ARC-Authentication-Results: i=1; mx.zohomail.eu; dkim=pass header.i=shytyi.net; spf=pass smtp.mailfrom=ietf.dmytro@shytyi.net; dmarc=pass header.from= header.from= DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; t=1569589265; s=hs; d=shytyi.net; i=ietf.dmytro@shytyi.net; h=Date:From:To:Cc:Message-Id:In-Reply-To:References:Subject:MIME-Version:Content-Type; l=11756; bh=P5byFCN01PpDF2Iu63GNntyI50JtDOGgeGHEJfiFccM=; b=ZVGeV07ITR1OEUqdIjZvrhxhGZv4Mq5CfkVfXER9U2jszsl+tAX/nqHXAWvxJrzI 96ralJdSq0Z82w5ENKTIT2Ii5ikDM4axEUM4q/83V6KM3WRav09U1zKyBvvZLxaeAI1 aLDdP80GqAUM5j9tR3jg4ijSE5vAmxsl/GFyDWew= Received: from sender-op-o12.zoho.eu (172.26.23.31 [172.26.23.31]) by mx.zoho.eu with SMTPS id 156958926556798.99181963631622; Fri, 27 Sep 2019 15:01:05 +0200 (CEST) Received: from mail.zoho.eu by mx.zoho.eu with SMTP id 1569589265481473.9644425785981; Fri, 27 Sep 2019 15:01:05 +0200 (CEST) Date: Fri, 27 Sep 2019 15:01:05 +0200 From: Dmytro Shytyi To: "Andy Bierman" Cc: "Joel Jaeggli" , "NetMod WG Chairs" , "NETMOD Working Group" , "draft-ietf-netmod-yang-data-ext" Message-Id: <16d72cf8447.102647a0719908.2122840284654932022@shytyi.net> In-Reply-To: References: <0A8BA26B-DA93-458C-86B6-EA231855C490@bogus.com> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_60826_1954318690.1569589265479" X-Priority: Medium User-Agent: Zoho Mail X-Mailer: Zoho Mail X-ZohoMailClient: External Archived-At: Subject: Re: [netmod] IPR check draft-ietf-netmod-yang-data-ext-04 X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 27 Sep 2019 13:01:28 -0000 ------=_Part_60826_1954318690.1569589265479 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hello, =E2=80=8B No, I'm not aware of any IPR that applies to this draft ______________ Dmytro SHYTYI ---- On Fri, 27 Sep 2019 14:57:50 +0200 Andy Bierman w= rote ---- On Thu, Sep 26, 2019 at 10:35 PM Joel Jaeggli wro= te: Authors, Contributors, WG, As part of WG Last Call for =C2=A0draft-ietf-netmod-yang-data-ext-04 Are you aware of any IPR that applies to drafts identified above? Please state either: =C2=A0"No, I'm not aware of any IPR that applies to this draft" Andy "No, I'm not aware of any IPR that applies to this draft" or "Yes, I'm aware of IPR that applies to this draft" If so, has this IPR been disclosed in compliance with IETF IPR rules (see RFCs 3669, 5378 and 8179 for more details)? If yes to the above, please state either: "Yes, the IPR has been disclosed in compliance with IETF IPR rules" or "No, the IPR has not been disclosed" If you answer no, please provide any additional details you think appropriate. If you are listed as a document author or contributor please answer the above by responding to this email regardless of whether or not you are aware of any relevant IPR. This document will not advance to the next stage until a response has been received from each author and listed contributor. NOTE: THIS APPLIES TO ALL OF YOU LISTED IN THIS MESSAGE'S TO LINES. If you are on the WG email list or attend WG meetings but are not listed as an author or contributor, we remind you of your obligations under the IETF IPR rules which encourages you to notify the IETF if you are aware of IPR of others on an IETF contribution, or to refrain from participating in any contribution or discussion related to your undisclosed IPR. For more information, please see the RFCs listed above and http://trac.tools.ietf.org/group/iesg/trac/wiki/IntellectualProperty. Thank you, NetMod WG Chairs PS Please include all listed in the headers of this message in your response. _______________________________________________ netmod mailing list=20 mailto:netmod@ietf.org=20 https://www.ietf.org/mailman/listinfo/netmod ------=_Part_60826_1954318690.1569589265479 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable =
Hello,
=E2=80=8B
No, I'm not aware = of any IPR that applies to this draft

______________
Dmytro SH= YTYI


---- On Fri, 27 Sep 2019 14:57:50 +0200 Andy Bierman &= lt;andy@yumaworks.com> wrote ----



On Thu, Sep 26, 2019 at 10:35 PM Joel Jaeggli <joelja@bogus.com> wrote:
=
Author= s, Contributors, WG,

As pa= rt of WG Last Call for  draft-ietf-netmod-yang-data-ext-04

Are you aware of any IPR that applies to draf= ts identified above?

Pleas= e state either:



 "No, I'm not aware of any= IPR that applies to this draft"

Andy

"No, I'm not aware of any IPR t= hat applies to this draft"
or
"Yes, I'm awa= re of IPR that applies to this draft"
If so, has this IPR been disclosed in compliance with IETF IPR = rules
(see RFCs 3669, 5378 and 8179 for more details)?

If yes to the above, please = state either:

"Yes, the IP= R has been disclosed in compliance with IETF IPR rules"
or<= /span>
"No, the IPR has not been disclosed"

If you answer no, please provide any additional = details you think
appropriate.

If you are listed as a document author or contributor = please answer the
above by responding to this email regardl= ess of whether or not you are
aware of any relevant IPR. Th= is document will not advance to the next
stage until a resp= onse has been received from each author and listed
contribu= tor. NOTE: THIS APPLIES TO ALL OF YOU LISTED IN THIS MESSAGE'S
TO LINES.

If you are o= n the WG email list or attend WG meetings but are not listed
the IETF IPR rules which encourages you to notify the IETF if y= ou are
aware of IPR of others on an IETF contribution, or = to refrain from
participating in any contribution or discus= sion related to your
undisclosed IPR. For more information,= please see the RFCs listed above
and
http://trac.tools.ietf.org/group/= iesg/trac/wiki/IntellectualProperty.

Thank yo= u,
NetMod WG Chairs
=
PS Please include all listed in the headers of this message in yo= ur
response.

__________________= _____________________________
netmod mailing list
netmod@ietf.org
https://www.ietf= .org/mailman/listinfo/netmod


------=_Part_60826_1954318690.1569589265479-- From nobody Fri Sep 27 09:30:54 2019 Return-Path: X-Original-To: netmod@ietfa.amsl.com Delivered-To: netmod@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 3D6AF12099E for ; Fri, 27 Sep 2019 09:30:46 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.898 X-Spam-Level: X-Spam-Status: No, score=-1.898 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=yumaworks-com.20150623.gappssmtp.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id o_gy8wYeCzwg for ; Fri, 27 Sep 2019 09:30:43 -0700 (PDT) Received: from mail-lj1-x22d.google.com (mail-lj1-x22d.google.com [IPv6:2a00:1450:4864:20::22d]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id BAA4B1209A4 for ; Fri, 27 Sep 2019 09:30:42 -0700 (PDT) Received: by mail-lj1-x22d.google.com with SMTP id y3so3107765ljj.6 for ; Fri, 27 Sep 2019 09:30:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yumaworks-com.20150623.gappssmtp.com; s=20150623; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=TJvGeOrKObLnDzXrvPk7/+aj7FREqAvdtmJQNp24wrw=; b=SQtjRWNkn+pYMu3VkqLdtloO4ZE8qZo+yG0/JOOqjtfduNGjy0S+RB3pk5u6CrAGzc TS0VXvtxXL7l2MiEtRnOKxNgKtBSjZXUMbOVsPnCmPAKPaIscQDeaoWX759b1JUm5q+s QIuaMt9Ago3uEWjcrhyKoXc5AFO9EFf6c4x7l2+RhSXN06uxw8epwR3uwta2sSyrU+bd mYmsetGrvC9EmAG5merLb68dv5SK9zOXyUEeddYYpTw0NhQD+YZaJEhHQAJvs8m38ai0 dd5LU+RpMY9K2QpsTql8P+/UfJc+ATIWkRUGWR/YDg91NdOlR2Naxkk5QcvYDksh7coQ h/5Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=TJvGeOrKObLnDzXrvPk7/+aj7FREqAvdtmJQNp24wrw=; b=de2IGzQQZ/YB5dxbUt0WyY3gqiBcN2TMh3rWGIKFsDyU1/glJO+nczWRj8r7hvDxKU i1PxH9w33DB5JVQhJcSUiQ64XGH6IyceEbvkK/ZTOo3wtckHEinMPnQiwA//fTEtZn5D x7ug6hjs2nvphp04nWDyVB8GE9WjHE/6NXWu7TdDQMSghHJj+HWIBQUg0Jtyroxd1lx9 L9W80K2JLmzggDNpdBWA8WuQgJtZLXSsHvLPsC+y/4YauDPq3gLaRUsIjH45kyJQ+VDV O7Ikw3AulPXB9xICJbjZ1BGCdxLkDDNiIyGRtWG2NjvZhgFW5WegFPtoFQIFFDX2bX3Y xE0Q== X-Gm-Message-State: APjAAAUZG04evHKNCJ+FcMo8jjpqDHOwxV6/wL2txD2MDskdOI782dFq iunehENyISJiKQhAdGvP3JKo0t8DSyVgZPIZTF9sJQ== X-Google-Smtp-Source: APXvYqxIrnPMksQ16YQPbjrSXDql5e/N6Hv5qCLnHhI275cKV+KZtXBGs6+1U95sIFsasFHQFamC4Itot3I/TfD25qs= X-Received: by 2002:a05:651c:104b:: with SMTP id x11mr3605472ljm.218.1569601840809; Fri, 27 Sep 2019 09:30:40 -0700 (PDT) MIME-Version: 1.0 References: <87h84z4kmw.fsf@nic.cz> <20190926.085644.1268671875357328723.mbj@tail-f.com> <9bc06f9f3f1c87c79ccce4e1c4d40755c804875a.camel@nic.cz> <20190926.094526.272771637371098799.mbj@tail-f.com> <01c701d57485$400d8d40$4001a8c0@gateway.2wire.net> <20190926183514.6jxnybluwdubrzvy@anna.jacobs.jacobs-university.de> In-Reply-To: From: Andy Bierman Date: Fri, 27 Sep 2019 09:30:29 -0700 Message-ID: To: "Rob Wilton (rwilton)" Cc: =?UTF-8?B?U2Now7Zud8OkbGRlciwgSsO8cmdlbg==?= , "netmod@ietf.org" Content-Type: multipart/alternative; boundary="000000000000291c3405938b688d" Archived-At: Subject: Re: [netmod] =?utf-8?q?What=27s_the_problem_with_NMDA=3F_was_Re=3A_?= =?utf-8?b?562U5aSNOiDnrZTlpI06IFBsZWFzZSBjbGFyaWZ5IGltcGxlbWVudGF0aW9u?= =?utf-8?b?IGFib3V0IOKAmHdoZW7igJk=?= X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 27 Sep 2019 16:30:46 -0000 --000000000000291c3405938b688d Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Fri, Sep 27, 2019 at 3:40 AM Rob Wilton (rwilton) wrote: > Hi, > > > -----Original Message----- > > From: netmod On Behalf Of Sch=C3=B6nw=C3=A4ld= er, J=C3=BCrgen > > Sent: 26 September 2019 19:35 > > To: Andy Bierman > > Cc: netmod@ietf.org > > Subject: Re: [netmod] What's the problem with NMDA? was Re: =E7=AD=94= =E5=A4=8D: =E7=AD=94=E5=A4=8D: > > Please clarify implementation about =E2=80=98when=E2=80=99 > > > > On Thu, Sep 26, 2019 at 10:44:01AM -0700, Andy Bierman wrote: > > > > > The IETF has completely punted the problem of converting data for a > > > configuration datastore to the schema tree for . > > > > I am not sure. The model consists of the applied > > configuration plus any config false extras. NMDA simplifies things sinc= e > > there is now a single tree structure instead of two if you have to hand= le > > models where applied configuration can be different than intended confi= g. > > If I configure /foo/bar in , I can check /foo/bar in > > whether it exists and matches what I configured. > > > > > Deviations may be different. A leaf may be string in 1 tree and > > > decimal64 in the other. There is an incorrect assumption that softwar= e > > > developers will deal with these corner-cases (correctly and > > > consistently). > > > > Not really true for applied config. And with non NMDA, there is no > > guarantee either that /foo/bar and /foo-state/bar use the same type and > > semantics. > > Indeed. For non-NMDA, even if /foo/bar and /foo-state/bar are the same > type in the published model, there is no guarantee that a server won't > deviate the /foo-state/bar leaf to change its type to differ from /foo/ba= r, > and this is allowed. > > But NMDA is aiming to be better than this. One of the fundamental aims i= s > that the config and operational values should be comparable, on the same > relative datastore path and have the same type. > > That is why RFC 8342 does not allow a server to change the type of a data > node in operational, they are only allowed to remove it to indicate that = it > is not supported. > > RFC 8342, section 5.3 The Operational State Datastore(operational): > > The datastore schema for MUST be a superset of the > combined datastore schema used in all configuration datastores, > except that configuration data nodes supported in a configuration > datastore MAY be omitted from if a server is not able > to accurately report them. > > The intention here is: > - If a server does a deviate "add|replace|delete" deviation on a config > data node then that same deviation MUST be applied to all datastores that > contain that data node in their schema (or otherwise operational cannot b= e > a superset). > - A server MAY have operational datastore specific deviate > "not-supported" deviations. The purpose of this is meant to help > migration, ideally servers would not have these deviations. > > Hence, a client/server can construct a single "superset" schema for the > device, and then the schema for each individual datastore must be a subse= t > of that "superset" schema (with the added requirement that there is only = a > single schema for all conventional datastores). > > IMO the new YANG library is the most disruptive and complex way possible to express a simple capability "operational value for configuration object foo supported or not". I prefer the capabilities module approach in https://tools.ietf.org/html/draft-ietf-netconf-notification-capabilities-04 Deprecating the YANG library and starting over is kind of a bull-in-the-china-shop approach to advertising some server capabilities. I appreciate that the new YANG library structurally allows invalid schemas > to be defined, but then so does the old YANG library as well. E.g. there > is nothing in the old YANG library structure to prevent a server from > reporting that it implements two different revisions of the same YANG 1.1 > module. > > Thanks, > Rob > > Andy > > > > > > The other big problem is an untested NMDA transition strategy that is > > > not well understood by vendors. > > > Should non-NMDA (/foo-state) be visible to or just ? > > > > Perhaps there is more explanation necessary. The idea here is that an > NMDA > > client should not bother to search for /foo-state, it should send a > > for /foo/state in operational. > > > > Yes, NMDA requires updates to clients. Whether these are visible or in > > which form they are visible to application logic likely depends on the > > client design. But yes, NMDA is not for free for clients. But once you > > have updated, we believe NMDA actually makes things simpler and more > > consistent. > > > > > Using the YANG library to separate the modules relies on the > > > assumption that the client is capable of managing each datastore > > > independently (instead of > > > 1 schema tree per server). > > > > Yes, YANG library can express pretty complex server model organizations= . > > This does not mean that all server have to use server model > organizations. > > I assume that also many clients will not be interested to understand th= e > > entire server model, they likely want to check the existance of only > those > > pieces that they care about. > > > > /js > > > > -- > > Juergen Schoenwaelder Jacobs University Bremen gGmbH > > Phone: +49 421 200 3587 Campus Ring 1 | 28759 Bremen | Germany > > Fax: +49 421 200 3103 > > _______________________________________________ > > netmod mailing list > > netmod@ietf.org > > https://www.ietf.org/mailman/listinfo/netmod > --000000000000291c3405938b688d Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable


=
On Fri, Sep 27, 2019 at 3:40 AM Rob W= ilton (rwilton) <rwilton@cisco.com<= /a>> wrote:
H= i,

> -----Original Message-----
> From: netmod <netmod-bounces@ietf.org> On Behalf Of Sch=C3=B6nw=C3=A4lder,= J=C3=BCrgen
> Sent: 26 September 2019 19:35
> To: Andy Bierman <andy@yumaworks.com>
> Cc: netmod@ietf.o= rg
> Subject: Re: [netmod] What's the problem with NMDA? was Re: =E7=AD= =94=E5=A4=8D: =E7=AD=94=E5=A4=8D:
> Please clarify implementation about =E2=80=98when=E2=80=99
>
> On Thu, Sep 26, 2019 at 10:44:01AM -0700, Andy Bierman wrote:
>
> > The IETF has completely punted the problem of converting data for= a
> > configuration datastore to the schema tree for <operational>= ;.
>
> I am not sure. The <operational> model consists of the applied > configuration plus any config false extras. NMDA simplifies things sin= ce
> there is now a single tree structure instead of two if you have to han= dle
> models where applied configuration can be different than intended conf= ig.
> If I configure /foo/bar in <running>, I can check /foo/bar in > <operational> whether it exists and matches what I configured. >
> > Deviations may be different.=C2=A0 A leaf may be string in 1 tree= and
> > decimal64 in the other. There is an incorrect assumption that sof= tware
> > developers will deal with these corner-cases (correctly and
> > consistently).
>
> Not really true for applied config. And with non NMDA, there is no
> guarantee either that /foo/bar and /foo-state/bar use the same type an= d
> semantics.

Indeed.=C2=A0 For non-NMDA, even if /foo/bar and /foo-state/bar are the sam= e type in the published model, there is no guarantee that a server won'= t deviate the /foo-state/bar leaf to change its type to differ from /foo/ba= r, and this is allowed.

But NMDA is aiming to be better than this.=C2=A0 One of the fundamental aim= s is that the config and operational values should be comparable, on the sa= me relative datastore path and have the same type.

That is why RFC 8342 does not allow a server to change the type of a data n= ode in operational, they are only allowed to remove it to indicate that it = is not supported.

RFC 8342, section 5.3 The Operational State Datastore(operational):

=C2=A0 =C2=A0The datastore schema for <operational> MUST be a superse= t of the
=C2=A0 =C2=A0combined datastore schema used in all configuration datastores= ,
=C2=A0 =C2=A0except that configuration data nodes supported in a configurat= ion
=C2=A0 =C2=A0datastore MAY be omitted from <operational> if a server = is not able
=C2=A0 =C2=A0to accurately report them.

The intention here is:
=C2=A0- If a server does a deviate "add|replace|delete" deviation= on a config data node then that same deviation MUST be applied to all data= stores that contain that data node in their schema (or otherwise operationa= l cannot be a superset).
=C2=A0- A server MAY have operational datastore specific deviate "not-= supported" deviations.=C2=A0 The purpose of this is meant to help migr= ation, ideally servers would not have these deviations.

Hence, a client/server can construct a single "superset" schema f= or the device, and then the schema for each individual datastore must be a = subset of that "superset" schema (with the added requirement that= there is only a single schema for all conventional datastores).


IMO the new YANG library is the most d= isruptive and complex way possible to express
a simple capability= "operational value for configuration object foo supported or not"= ;.
I prefer the capabilities module approach in=C2=A0=C2=A0https://tools.ietf.org/html/draft-ietf-netconf-notification-capabili= ties-04
Deprecating the YANG library and starting over is= kind of a bull-in-the-china-shop
approach to advertising some se= rver capabilities.


I appreciate that the new YANG library structurally allows invalid schemas = to be defined, but then so does the old YANG library as well.=C2=A0 E.g. th= ere is nothing in the old YANG library structure to prevent a server from r= eporting that it implements two different revisions of the same YANG 1.1 mo= dule.

Thanks,
Rob



Andy
=C2=A0

>
> > The other big problem is an untested NMDA transition strategy tha= t is
> > not well understood by vendors.
> > Should non-NMDA (/foo-state) be visible to <get-data> or ju= st <get>?
>
> Perhaps there is more explanation necessary. The idea here is that an = NMDA
> client should not bother to search for /foo-state, it should send a &l= t;get>
> for /foo/state in operational.
>
> Yes, NMDA requires updates to clients. Whether these are visible or in=
> which form they are visible to application logic likely depends on the=
> client design. But yes, NMDA is not for free for clients. But once you=
> have updated, we believe NMDA actually makes things simpler and more > consistent.
>
> > Using the YANG library to separate the modules relies on the
> > assumption that the client is capable of managing each datastore<= br> > > independently (instead of
> > 1 schema tree per server).
>
> Yes, YANG library can express pretty complex server model organization= s.
> This does not mean that all server have to use server model organizati= ons.
> I assume that also many clients will not be interested to understand t= he
> entire server model, they likely want to check the existance of only t= hose
> pieces that they care about.
>
> /js
>
> --
> Juergen Schoenwaelder=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Jacobs U= niversity Bremen gGmbH
> Phone: +49 421 200 3587=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Campus Ring 1= | 28759 Bremen | Germany
> Fax:=C2=A0 =C2=A0+49 421 200 3103=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0<= ;https://www.jacobs-university.de/>
> _______________________________________________
> netmod mailing list
> netmod@ietf.org
> https://www.ietf.org/mailman/listinfo/netmod
--000000000000291c3405938b688d-- From nobody Fri Sep 27 18:40:00 2019 Return-Path: X-Original-To: netmod@ietfa.amsl.com Delivered-To: netmod@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 7B5F5120026 for ; Fri, 27 Sep 2019 18:39:58 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.998 X-Spam-Level: X-Spam-Status: No, score=-1.998 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id zQvk2PM8EkSv for ; Fri, 27 Sep 2019 18:39:56 -0700 (PDT) Received: from mail-pg1-x52a.google.com (mail-pg1-x52a.google.com [IPv6:2607:f8b0:4864:20::52a]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id E178012000F for ; Fri, 27 Sep 2019 18:39:56 -0700 (PDT) Received: by mail-pg1-x52a.google.com with SMTP id t14so4358291pgs.3 for ; Fri, 27 Sep 2019 18:39:56 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:mime-version:subject:message-id:date:to; bh=SgngeLEyX9347U1X/XwjsOhPORBWiDT2fxNdwVPTEN4=; b=pFveykXTplTso0V573/BNqHJmSJbtSY/24pHwfOfShgB305wGbQqYrP/l9VbcrXi0U Dw2+1cmj8GHGx/uUR6nD0G8BvyQSFFRo6EyRJp2yDOITTzjcrVaUOo/l5arSW2LzMegD j9Z2u61sDcfUWzRhwA/GsFIlqreQrFbL77+A0AgJxLhDQYsm+4A9eFLoWoG/IW7h4pm7 cjHExBCNxTX4iLP0iUe7fLsVeEjqVUew217qcYyi/SOxU/5WCrQUZnc4oc1Y/BbWh4wl SGzoXOhSGGzlpkZXDkuQYMEXsZhcETZbaV6rEss+L9Y4pg74aPPli+ax7VjaaZ6eIMIT L4IQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:mime-version:subject:message-id:date:to; bh=SgngeLEyX9347U1X/XwjsOhPORBWiDT2fxNdwVPTEN4=; b=unYjZxkhz9g9cBSwqMIuOqRRk1BjLrbIAqkU5znCi3CSfCrXmC0mUWujBVuExRhWA8 gUUJgcceZWmVqPbT37cr0VQ4vonUyu7zaFoFij1J698s6N5kwHR1LOXCNeBgQDZK9fQJ wt27PhA5LTg6KyZ13333mln/Gt1KIkDqb9mmVCkE8c1Gobuy+aeOKomvXvb8mc62lCPp YQtgB3z3NOa5kb7O5PGOmcjke0c8pHKDzBp4xTARETa0a830SOmEO8ipQXfJ33Eu95MZ DjmXwUZ90SYCLy5LB5uhJIz7LVshAKKJJx1rFqWxEvnTdXasNhBSWXIn+llPqAkJk5lx u44Q== X-Gm-Message-State: APjAAAVSrqJMMMOZyymH6jO6H2KmmFm/a8bZZU8GOsgb2dLpPS1P2awF ozh/rlAhTSWSOf9m+M4hHwuGUYDYHeM= X-Google-Smtp-Source: APXvYqzs3B4KsE7iAkTx0Q9XrEEqv/K1JZZIAKVw5e01IQRPKLplADADBL4vPZ8JFrpcSNFvvGNG9A== X-Received: by 2002:a62:1888:: with SMTP id 130mr8072006pfy.72.1569634795998; Fri, 27 Sep 2019 18:39:55 -0700 (PDT) Received: from ?IPv6:2601:647:5600:5020:8966:a5ac:204d:e8de? ([2601:647:5600:5020:8966:a5ac:204d:e8de]) by smtp.gmail.com with ESMTPSA id z12sm4195076pfj.41.2019.09.27.18.39.55 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 27 Sep 2019 18:39:55 -0700 (PDT) From: Mahesh Jethanandani Content-Type: multipart/alternative; boundary="Apple-Mail=_D6B9C177-6744-4715-999B-2C4F2EB8FE58" Mime-Version: 1.0 (Mac OS X Mail 11.5 \(3445.9.1\)) Message-Id: <8F6D6E58-CCB2-4404-AFB1-876EBE5721E7@gmail.com> Date: Fri, 27 Sep 2019 18:39:54 -0700 To: netmod X-Mailer: Apple Mail (2.3445.9.1) Archived-At: Subject: [netmod] 6991bis - Any plans to add more URI Syntax components? X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 28 Sep 2019 01:39:59 -0000 --Apple-Mail=_D6B9C177-6744-4715-999B-2C4F2EB8FE58 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii Hi Juergen, Is there a plan to add more URI syntax components in rfc6991bis? I know = there is a typedef for uri, but I was looking specifically for the = following that are defined in RFC 3986. Scheme Authority field including User information Path Query Fragment Thanks. Mahesh Jethanandani mjethanandani@gmail.com --Apple-Mail=_D6B9C177-6744-4715-999B-2C4F2EB8FE58 Content-Transfer-Encoding: 7bit Content-Type: text/html; charset=us-ascii Hi Juergen,

Is there a plan to add more URI syntax components in rfc6991bis? I know there is a typedef for uri, but I was looking specifically for the following that are defined in RFC 3986.
  • Scheme
  • Authority field including
    • User information
  • Path
  • Query
  • Fragment

Thanks.

Mahesh Jethanandani



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X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 28 Sep 2019 08:57:23 -0000 Hi Mahesh, are these frequently needed? Are there YANG modules that use these fields already? /js On Fri, Sep 27, 2019 at 06:39:54PM -0700, Mahesh Jethanandani wrote: > Hi Juergen, >=20 > Is there a plan to add more URI syntax components in rfc6991bis? I know t= here is a typedef for uri, but I was looking specifically for the following= that are defined in RFC 3986. > Scheme > Authority field including > User information > Path > Query > Fragment >=20 > Thanks. >=20 > Mahesh Jethanandani > mjethanandani@gmail.com >=20 >=20 >=20 > _______________________________________________ > netmod mailing list > netmod@ietf.org > https://www.ietf.org/mailman/listinfo/netmod --=20 Juergen Schoenwaelder Jacobs University Bremen gGmbH Phone: +49 421 200 3587 Campus Ring 1 | 28759 Bremen | Germany Fax: +49 421 200 3103 From nobody Mon Sep 30 07:17:31 2019 Return-Path: X-Original-To: netmod@ietfa.amsl.com Delivered-To: netmod@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id D5F10120099; Mon, 30 Sep 2019 07:17:29 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -13.101 X-Spam-Level: X-Spam-Status: No, score=-13.101 tagged_above=-999 required=5 tests=[BAYES_05=-0.5, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_HI=-5, SPF_PASS=-0.001, USER_IN_DEF_DKIM_WL=-7.5] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1024-bit key) header.d=cisco.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id DrxWOAdCsMvB; Mon, 30 Sep 2019 07:17:28 -0700 (PDT) Received: from rcdn-iport-5.cisco.com (rcdn-iport-5.cisco.com [173.37.86.76]) (using TLSv1.2 with cipher DHE-RSA-SEED-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 29E78120058; Mon, 30 Sep 2019 07:17:28 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=3280; q=dns/txt; s=iport; t=1569853048; x=1571062648; h=to:subject:from:message-id:date:mime-version; bh=02Ly2HJn4yJnjDw14zFc2ZIRVNQ3R8JQld3gjgn9SPM=; b=TTnmkadgmQPtvgY7Hz3GxDQ54Xz0SK8i2NUBhT9/a+s9JH4Q18mvFidn nYR2Pg9LNnU7tZE1PDLL9zJ8fOIeUESLB9G6OVTkgNO2jx2gY+C//+OkY iAu/z6FtVDg6INZwm5XzDQDroW1evNTzQG2hK3oaVEYjLlRsMerZW/C4U I=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: =?us-ascii?q?A0A/AABpDZJd/4QNJK1cChoBAQEBAQI?= =?us-ascii?q?BAQEBDAIBAQEBgVYCAQEBAQsBgRuBAoFAMoRMjnCJU4tTiAgJAQEBDi8BAYg?= =?us-ascii?q?FIzcGDgIDCQEBBAEBAQIBBQRthTmFdXU+Al8BDAgBAYMeggusbHWBMh+FLoM?= =?us-ascii?q?ngUiBNAGMDRiBQD+BOIMphBmDNoJYBJYKlw2CLJUFBhuOCIsujiGQH4kogWg?= =?us-ascii?q?igVgzGggbFYMoTxAUkBRAA5EwAQE?= X-IronPort-AV: E=Sophos;i="5.64,567,1559520000"; d="scan'208,217";a="418759758" Received: from alln-core-10.cisco.com ([173.36.13.132]) by rcdn-iport-5.cisco.com with ESMTP/TLS/DHE-RSA-SEED-SHA; 30 Sep 2019 14:17:27 +0000 Received: from [10.82.233.40] (rtp-vpn5-295.cisco.com [10.82.233.40]) by alln-core-10.cisco.com (8.15.2/8.15.2) with ESMTP id x8UEHQO9000489; Mon, 30 Sep 2019 14:17:26 GMT To: draft-ietf-netmod-rfc6991-bis@ietf.org, "netmod@ietf.org" From: Robert Wilton Message-ID: <9878ec54-4b3b-e83c-a60c-973478de11f4@cisco.com> Date: Mon, 30 Sep 2019 15:17:25 +0100 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.9.0 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="------------DBA7948C71A2BB7E8530EFEA" Content-Language: en-US X-Outbound-SMTP-Client: 10.82.233.40, rtp-vpn5-295.cisco.com X-Outbound-Node: alln-core-10.cisco.com Archived-At: Subject: [netmod] draft-ietf-netmod-rfc6991-bis: Comment on node-instance-identifier X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 30 Sep 2019 14:17:30 -0000 This is a multi-part message in MIME format. --------------DBA7948C71A2BB7E8530EFEA Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Hi Juergen, Should the "node-instance-identify" type specify how the path "/" is treated? I noted that in rfc8341, the behavior for "/" is described in the leaf "path" description rather than in the type definition, but I was thinking that it might be better if this behaviour was specified as part of the typedef. Snippet from RFC8341: case data-node { leaf path { type node-instance-identifier; mandatory true; description "Data node instance-identifier associated with the data node, action, or notification controlled by this rule. Configuration data or state data instance-identifiers start with a top-level data node. A complete instance-identifier is required for this type of path value. The special value '/' refers to all possible datastore contents."; } } Thanks, Rob --------------DBA7948C71A2BB7E8530EFEA Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: 7bit

Hi Juergen,

Should the "node-instance-identify" type specify how the path "/" is treated?

I noted that in rfc8341, the behavior for "/" is described in the leaf "path" description rather than in the type definition, but I was thinking that it might be better if this behaviour was specified as part of the typedef.

Snippet from RFC8341:

             case data-node {
               leaf path {
                 type node-instance-identifier;
                 mandatory true;
                 description
                   "Data node instance-identifier associated with the
                    data node, action, or notification controlled by
                    this rule.

                    Configuration data or state data
                    instance-identifiers start with a top-level
                    data node.  A complete instance-identifier is
                    required for this type of path value.

                    The special value '/' refers to all possible
                    datastore contents.";
               }
             }

Thanks,
Rob
--------------DBA7948C71A2BB7E8530EFEA-- From nobody Mon Sep 30 14:27:55 2019 Return-Path: X-Original-To: netmod@ietfa.amsl.com Delivered-To: netmod@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id EEEC012013D for ; Mon, 30 Sep 2019 14:27:53 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.999 X-Spam-Level: X-Spam-Status: No, score=-1.999 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id Mv0dOuKOYtWO for ; Mon, 30 Sep 2019 14:27:52 -0700 (PDT) Received: from mail-pg1-x52d.google.com (mail-pg1-x52d.google.com [IPv6:2607:f8b0:4864:20::52d]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 3B45812007C for ; Mon, 30 Sep 2019 14:27:52 -0700 (PDT) Received: by mail-pg1-x52d.google.com with SMTP id e1so2553362pgj.6 for ; Mon, 30 Sep 2019 14:27:52 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=8/XMdXH07NtFtAwMWN9YMl4FXzbo/vuYhzVJQRZn32c=; b=s8bpApV53gR1HxABH4KAWK2Fkgbxa60gESu6QIO7rJnUx4cAntFyykcfDgY0acaPJB Pl8P6lZ2Qc85jvWQYAeyGcgnCc5EpO/KKQRQJS/znOy6I//ViqMg7FRdHmU5Gtx84CoV d+/D8DBQQAc5u/5i9HfRnLtHx7h3a75fCMmwkCA/JAykDZMvvaBiSTRBrk9EHGTBwUsN 9VMekmdCwC4BLidis6i0qrCiV2FIzMwQpNkONR+ccegz8x+rq3eOkeP23oQ3N4XaupMt b4gpWbD9sLUrYUEnP7LE2P30B54Usfsu4d8/2Bv9KyxBUWiwjYZ/z2FxNHDTXj2t0vps lmNw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=8/XMdXH07NtFtAwMWN9YMl4FXzbo/vuYhzVJQRZn32c=; b=iWbuKpOwgEK+0leIZphUxzcHWehHpabor5gGPwNg7tf9DXg5XDeQoHBOr7AECM2rNY /pV0WbVAXyond80hQ/JlxiXE94jO7iibiFZ7n0s0wuOF51WaBaN8D380VzgkNy9/OS0D vh1mghALGkiIGFq7McMqZCE0ma7YU4Ffk4wukal507xOAGT4/Qh8v77LB3JHaznPFurl q+h4d8LMMIrtRAR1xcLmCbzJ4RGDmg8Dt7WFal2RieQipAOOZ7XY3cl1zqn9Wo5CI3qz +HjPmo+9xOimOyLY7c8KyBEVGf31DSIAZS6raqcV6V4bFqW0TtNKZDcV3s++dkiYAXVR zd8w== X-Gm-Message-State: APjAAAUug+/M1sAbY3uylPu9fiBWsFS4iRmfAoMDB1C85lEme0p6mwsr mK45APseYAWyFsKglmfvkm+/bgyx X-Google-Smtp-Source: APXvYqxlO/WQ9GLslQT0ugxRk0J3gcGo/pPNnBDp13miGTNTvfRAWI35dzx23xEvZORCRSs0/bh60g== X-Received: by 2002:a63:6e85:: with SMTP id j127mr27021703pgc.326.1569878871516; Mon, 30 Sep 2019 14:27:51 -0700 (PDT) Received: from [10.33.123.155] ([66.170.99.2]) by smtp.gmail.com with ESMTPSA id u9sm12969253pfl.138.2019.09.30.14.27.50 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 30 Sep 2019 14:27:50 -0700 (PDT) Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (Mac OS X Mail 11.5 \(3445.9.1\)) From: Mahesh Jethanandani In-Reply-To: <20190928085715.oo457rppqxcmd2qx@anna.jacobs.jacobs-university.de> Date: Mon, 30 Sep 2019 14:27:49 -0700 Cc: netmod Content-Transfer-Encoding: quoted-printable Message-Id: <3090E658-652B-43CA-A777-180EA4875200@gmail.com> References: <8F6D6E58-CCB2-4404-AFB1-876EBE5721E7@gmail.com> <20190928085715.oo457rppqxcmd2qx@anna.jacobs.jacobs-university.de> To: Juergen Schoenwaelder X-Mailer: Apple Mail (2.3445.9.1) Archived-At: Subject: Re: [netmod] 6991bis - Any plans to add more URI Syntax components? X-BeenThere: netmod@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: NETMOD WG list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 30 Sep 2019 21:27:54 -0000 Hi Juergen, > On Sep 28, 2019, at 1:57 AM, Sch=C3=B6nw=C3=A4lder, J=C3=BCrgen = wrote: >=20 > Hi Mahesh, >=20 > are these frequently needed? Are there YANG modules that use these > fields already? Over in ETSI, I just added them to the YANG model that defines VNF = Descriptors (VNFD), as part of what is called VnfConfigurableProperties. In addition, I know that draft-kwatsen-netconf-http-client-server draft = tries to define 'user-id'. And there has been discussion around = draft-ietf-netconf-https-notif needing to define a =E2=80=98path=E2=80=99 = attribute, although Martin does not think it is needed. Anyway, these = are the instances I know of that could use these definitions. I am sure = there are more. Cheers. >=20 > /js >=20 > On Fri, Sep 27, 2019 at 06:39:54PM -0700, Mahesh Jethanandani wrote: >> Hi Juergen, >>=20 >> Is there a plan to add more URI syntax components in rfc6991bis? I = know there is a typedef for uri, but I was looking specifically for the = following that are defined in RFC 3986. >> Scheme >> Authority field including >> User information >> Path >> Query >> Fragment >>=20 >> Thanks. >>=20 >> Mahesh Jethanandani >> mjethanandani@gmail.com >>=20 >>=20 >>=20 >=20 >> _______________________________________________ >> netmod mailing list >> netmod@ietf.org >> https://www.ietf.org/mailman/listinfo/netmod >=20 >=20 > --=20 > Juergen Schoenwaelder Jacobs University Bremen gGmbH > Phone: +49 421 200 3587 Campus Ring 1 | 28759 Bremen | Germany > Fax: +49 421 200 3103 Mahesh Jethanandani mjethanandani@gmail.com