Re: [CCAMP] I-D Action: draft-ietf-ccamp-otn-topo-yang-03.txt

"t.petch" <ietfc@btconnect.com> Sat, 16 June 2018 11:43 UTC

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From: "t.petch" <ietfc@btconnect.com>
To: "Zhenghaomian \(Zhenghaomian, Optical &Microwave Technology Research Dept\)" <zhenghaomian@huawei.com>, <ccamp@ietf.org>
References: <E0C26CAA2504C84093A49B2CAC3261A43B699664@dggeml511-mbx.china.huawei.com>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/ccamp/_bGWO-Qe9ZVfN8w-MM2YsyublJY>
Subject: Re: [CCAMP] I-D Action: draft-ietf-ccamp-otn-topo-yang-03.txt
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----- Original Message -----
From: "Zhenghaomian (Zhenghaomian, Optical &Microwave Technology
Research Dept)" <zhenghaomian@huawei.com>
Sent: Friday, June 15, 2018 11:36 AM

> Dear WG,
>
> This is an update to OTN topology after 8 month, as we are waiting for
the maturity of basic TE topology model. Now the model is updated to be
aligned with TE one. You are welcome to review and provide your
comments.

It's a tough read.

I might find section 3.2 easier to follow if it was written in
Assembler:-(  A tree is intended to make a module easier to grasp but I
think that this fails here.  As RFC8340 says
" As tree diagrams are intended to provide a simplified
   view of a module, diagrams longer than a page should generally be
   avoided.  "

Nor is the module itself much simpler e.g.

  augment "/nw:networks/nw:network/nw:node/tet:te/"
        + "tet:information-source-entry/tet:connectivity-matrices/"
        + "tet:optimizations/tet:algorithm/tet:metric/"
        + "tet:optimization-metric/"
        + "tet:explicit-route-exclude-objects/"
        + "tet:route-object-exclude-object/tet:type/"
        + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
    when "../../../../../../../../../../../../../../../"
       + "nw:network-types/tet:te-topology/"
       + "otntopo:otn-topology" {

rinse and repeat, seventy times.

I do not have a solution, just think that YANG has got it wrong
somewhere:-(

Meanwhile, there are my usual red tape issues.
 - copyright
 - date on module
 - reference statements on import
 - I-D References for any references in the module

along with incomplete sections 5, 6, 7.

I think that the failure of the tree diagram is the one that needs
tackling, perhaps with assistance from the contributors to RFC8340.

Tom Petch

>
> There are still some YANG errors because of the incorrect reference to
OTN tunnel model and OTN types, which have not been updated yet. The
other OTN tunnel model draft is under our processing and will be
announced in the next week. All the OTN models can be found at the
github:
https://github.com/haomianzheng/IETF-ACTN-YANG-Model/tree/master/YANG/cc
amp, and you are welcome to comments.
>
> Thank you.
>
> Best wishes,
> Haomian
>
> -----邮件原件-----
> 发件人: CCAMP [mailto:ccamp-bounces@ietf.org] 代表
internet-drafts@ietf.org
> 发送时间: 2018年6月15日 17:14
> 收件人: i-d-announce@ietf.org
> 抄送: ccamp@ietf.org
> 主题: [CCAMP] I-D Action: draft-ietf-ccamp-otn-topo-yang-03.txt
>
>
> A New Internet-Draft is available from the on-line Internet-Drafts
directories.
> This draft is a work item of the Common Control and Measurement Plane
WG of the IETF.
>
>         Title           : A YANG Data Model for Optical Transport
Network Topology
>         Authors         : Haomian Zheng
>                           Aihua Guo
>                           Italo Busi
>                           Anurag Sharma
>                           Xufeng Liu
>                           Sergio Belotti
>                           Yunbin Xu
>                           Lei Wang
>                           Oscar Gonzalez de Dios
> Filename        : draft-ietf-ccamp-otn-topo-yang-03.txt
> Pages           : 58
> Date            : 2018-06-15
>
> Abstract:
>    A transport network is a server-layer network designed to provide
>    connectivity services for a client-layer network to carry the
client
>    traffic transparently across the server-layer network resources.  A
>    transport network can be constructed from equipments utilizing any
of
>    a number of different transport technologies such as the evolving
>    Optical Transport Networks (OTN) or packet transport as provided by
>    the MPLS-Transport Profile (MPLS-TP).
>
>    This document describes a YANG data model to describe the
topologies
>    of an Optical Transport Network (OTN).  It is independent of
control
>    plane protocols and captures topological and resource related
>    information pertaining to OTN.  This model enables clients, which
>    interact with a transport domain controller via a REST interface,
for
>    OTN topology related operations such as obtaining the relevant
>    topology resource information.
>
>
> The IETF datatracker status page for this draft is:
> https://datatracker.ietf.org/doc/draft-ietf-ccamp-otn-topo-yang/
>
> There are also htmlized versions available at:
> https://tools.ietf.org/html/draft-ietf-ccamp-otn-topo-yang-03
>
https://datatracker.ietf.org/doc/html/draft-ietf-ccamp-otn-topo-yang-03
>
> A diff from the previous version is available at:
> https://www.ietf.org/rfcdiff?url2=draft-ietf-ccamp-otn-topo-yang-03
>
>
> Please note that it may take a couple of minutes from the time of
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