Re: [CCAMP] Fwd: New Version Notification for draft-vergara-ccamp-flexigrid-yang-04.txt

[Dieter Beller <[e-mail]>]

Hi Jorge, all,

I read the 04-revision of the draft and I have some major concerns regarding the modeling of optical transponders: the draft
defines models for the following two transponder types: flexi-grid-transponder and flexi-grid-sliceable-transponder.

By doing so, the draft tries to define a data plane standard, which is clearly outside the scope of CCAMP (we had this kind of
discussion many times in the past). Please note that http://www.itu.int/itu-t/recommendations/rec.aspx?rec=10396" rel="nofollow">ITU-T Recommendation G.698.2 defines application codes and OpenConfig
is following a similar approach as opposed to define an exhaustive list of transponder attributes (the attribute list in the draft is
b.t.w. incomplete and does not guarantee interoperability). The https://github.com/openconfig/public/tree/master/release/models/optical-transport" rel="nofollow">OpenConfig terminal-device YANG model defines a single
operational-mode attribute for the optical-channel as defined below:

    leaf operational-mode {
      type uint16;
      description
        "Vendor-specific mode identifier -- sets the operational
        mode for the channel.  The specified operational mode must
        exist in the list of supported operational modes supplied
        by the device";
    }



   +--rw optical-channel
      +--rw config
      |  +--rw frequency?             oc-opt-types:frequency-type
      |  +--rw target-output-power?   decimal64
      |  +--rw operational-mode?      uint16
      |  +--rw line-port?             -> /oc-platform:components/component/name


This is similar to the application code approach. Two transponders are considered  interoperable if they have at least one
operational-mode in common. I strongly suggest that we follow a similar approach in CCAMP.

---

Excerpts from draft-vergara-ccamp-flexigrid-yang-04.txt:

flexi-grid-transponder
   augment /nd:networks/nd:network/nd:node/tet:te/
   tet:tunnel-termination-point:
      +--rw transponder-type           flexi-grid-transponder-type
      +--rw config
      |  +--rw available-modulation*   modulation
      |  +--rw modulation-type?        modulation
      |  +--rw available-FEC*          FEC
      |  +--rw FEC-enabled?            boolean
      |  +--rw FEC-type?               FEC
      +--ro state
         +--ro available-modulation*   modulation
         +--ro modulation-type?        modulation
         +--ro available-FEC*          FEC
         +--ro FEC-enabled?            boolean
         +--ro FEC-type?               FEC

flexi-grid-sliceable-transponder
   augment /nd:networks/nd:network/nd:node/tet:te/
   tet:tunnel-termination-point:
      +--rw transponder-type           flexi-grid-transponder-type
      +--rw config
      |  +--rw available-modulation*   modulation
      |  +--rw modulation-type?        modulation
      |  +--rw available-FEC*          FEC
      |  +--rw FEC-enabled?            boolean
      |  +--rw FEC-type?               FEC
      |  +--rw transponder-list* [carrier-id]
      |     +--rw carrier-id           uint32
      +--ro state
         +--ro available-modulation*   modulation
         +--ro modulation-type?        modulation
         +--ro available-FEC*          FEC
         +--ro FEC-enabled?            boolean
         +--ro FEC-type?               FEC
         +--ro transponder-list* [carrier-id]
            +--ro carrier-id           uint32

Thanks,
Dieter

On 06.03.2017 16:18, Jorge E. López de Vergara Méndez wrote:

    Dear all,

    Please find below a new draft of the Flexigrid YANG model. In this new version some changes have been made, according to previous received feedback:

• Now both models are updated to YANG 1.1.
• State containers in the tree structure are now read-only.
• "Transponder" does not augment "node" anymore. Flexi-grid-node is the only structure playing this role in the model. Therefore, node-type was eliminated.
• "Transponder" augments "tunnel-termination-point". Since this structure does not have state or config subdivision, we have added config and state containers. Transponder-type is included to indicate whether it is a transponder or a sliceable transponder. 
• Few corrections to be coherent with TE topology model.
• Reference types are taken from TE topology model, so transponder-ref becomes tunnel-tp-id. Also node-ref is te-node-id.
• Minor corrections in some descriptions.
• Updated references and authors.
  

    If you have any comment, please do not hesitate to send them to me.

    Best regards,

    -Jorge

-------- Mensaje reenviado --------

Asunto:	New Version Notification for draft-vergara-ccamp-flexigrid-yang-04.txt
Fecha:	Mon, 06 Mar 2017 01:03:50 -0800
De:	[e-mail]
Para:	Oscar de Dios <[e-mail]>, Oscar Gonzalez de Dios <[e-mail]>, Gabriele Galimberti <[e-mail]>, Jorge E. Lopez de Vergara <[e-mail]>, Universidad de Madrid <[e-mail]>, Daniel King <[e-mail]>, Daniel Perdices <[e-mail]>, Young Lee <[e-mail]>, Victor Lopezalvarez <[e-mail]>, Victor Lopez <[e-mail]>

A new version of I-D, draft-vergara-ccamp-flexigrid-yang-04.txt
has been successfully submitted by Jorge E. Lopez de Vergara and posted to the
IETF repository.

Name:		draft-vergara-ccamp-flexigrid-yang
Revision:	04
Title:		YANG data model for Flexi-Grid Optical Networks
Document date:	2017-03-06
Group:		Individual Submission
Pages:		32
URL:            https://www.ietf.org/internet-drafts/draft-vergara-ccamp-flexigrid-yang-04.txt" rel="nofollow">https://www.ietf.org/internet-drafts/draft-vergara-ccamp-flexigrid-yang-04.txt
Status:         https://datatracker.ietf.org/doc/draft-vergara-ccamp-flexigrid-yang/" rel="nofollow">https://datatracker.ietf.org/doc/draft-vergara-ccamp-flexigrid-yang/
Htmlized:       https://tools.ietf.org/html/draft-vergara-ccamp-flexigrid-yang-04" rel="nofollow">https://tools.ietf.org/html/draft-vergara-ccamp-flexigrid-yang-04
Diff:           https://www.ietf.org/rfcdiff?url2=draft-vergara-ccamp-flexigrid-yang-04" rel="nofollow">https://www.ietf.org/rfcdiff?url2=draft-vergara-ccamp-flexigrid-yang-04

Abstract:
   This document defines a YANG model for managing flexi-grid optical
   Networks. The model described in this document is composed of two
   submodels: one to define a flexi-grid traffic engineering database,
   and other one to describe the flexi-grid paths or media channels.
   It is grounded on other defined YANG abstract models.

                                                                                  


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.

The IETF Secretariat

_______________________________________________
CCAMP mailing list
[e-mail]
https://www.ietf.org/mailman/listinfo/ccamp" rel="nofollow">https://www.ietf.org/mailman/listinfo/ccamp