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Versions: (draft-zhang-ccamp-l1-topo-yang) 00 01 02 03 04 05 06 07 08 09 10 11

CCAMP Working Group                                             H. Zheng
Internet-Draft                                                   I. Busi
Intended status: Standards Track                     Huawei Technologies
Expires: September 10, 2020                                       X. Liu
                                                          Volta Networks
                                                              S. Belotti
                                                                   Nokia
                                                     O. Gonzalez de Dios
                                                              Telefonica
                                                           March 9, 2020


        A YANG Data Model for Optical Transport Network Topology
                   draft-ietf-ccamp-otn-topo-yang-10

Abstract

   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, for OTN topology related
   operations such as obtaining the relevant topology resource
   information.

Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in BCP 14 [RFC2119]
   [RFC8174] when, and only when, they appear in all capitals, as shown
   here.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at https://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."




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   This Internet-Draft will expire on September 10, 2020.

Copyright Notice

   Copyright (c) 2020 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (https://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terminology and Notations . . . . . . . . . . . . . . . . . .   3
   3.  YANG Data Model for OTN Topology  . . . . . . . . . . . . . .   4
     3.1.  OTN Topology Data Model Overview  . . . . . . . . . . . .   4
     3.2.  YANG Tree for OTN topology  . . . . . . . . . . . . . . .   5
   4.  The YANG Code . . . . . . . . . . . . . . . . . . . . . . . .  27
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  65
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .  66
   7.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  67
   8.  Contributors  . . . . . . . . . . . . . . . . . . . . . . . .  67
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  68
     9.1.  Normative References  . . . . . . . . . . . . . . . . . .  68
     9.2.  Informative References  . . . . . . . . . . . . . . . . .  69
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  70

1.  Introduction

   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 of equipments utilizing any of a
   number of different transport technologies such as the Optical
   Transport Networks (OTN) or packet transport such as provided by the
   MPLS-Transport Profile (MPLS-TP).

   This document defines a data model of an OTN network topology, using
   YANG [RFC7950].  The model can be used by an application exposing to
   a transport controller.  Furthermore, it can be used by an
   application for the following purposes (but not limited to):



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   o  To obtain a whole view of the network topology information of its
      interest;

   o  To receive notifications with regard to the information change of
      the OTN topology;

   o  To enforce the establishment and update of a network topology with
      the characteristic specified in the data model;

   The YANG model defined in this document is independent of control
   plane protocols and captures topology related information pertaining
   to an Optical Transport Networks (OTN) electrical layer, as the scope
   specified by [RFC7062] .  Furthermore, it is not a stand-alone model,
   but augmenting from the TE topology YANG model defined in
   [I-D.ietf-teas-yang-te-topo], and importing from the generic Layer 1
   types defined in [I-D.ietf-ccamp-layer1-types].  Following TE
   topology YANG model, the YANG model defined in this document is
   interface independent.  The model is included in
   [I-D.ietf-teas-actn-yang], which indicates the typical usage of IETF
   YANG models in ACTN architecture specified by [RFC8453].  More
   specifically, the usage of this model between controllers is
   described in [I-D.ietf-ccamp-transport-nbi-app-statement].

   Other topology models for Optical network technologies, including
   fixed Dense Wavelength Switched Optical Network (WSON) and flexible
   optical networks (a.k.a., flexi-grid networks), are covered in
   [I-D.ietf-ccamp-wson-yang] and [I-D.ietf-ccamp-flexigrid-yang],
   respectively.

2.  Terminology and Notations

   A simplified graphical representation of the data model is used in
   this document.  The meaning of the symbols in the YANG data tree
   presented later in this document is defined in [RFC8340].  They are
   provided below for reference.

   o  Brackets "[" and "]" enclose list keys.

   o  Abbreviations before data node names: "rw" means configuration
      (read-write) and "ro" state data (read-only).

   o  Symbols after data node names: "?" means an optional node, "!"
      means a presence container, and "*" denotes a list and leaf-list.

   o  Parentheses enclose choice and case nodes, and case nodes are also
      marked with a colon (":").





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   o  Ellipsis ("...") stands for contents of subtrees that are not
      shown.

   o  Some of the key terms used in this document are listed as follow.

   o  TS: Tributary Slot.

   o  TSG: Tributary Slot Granularity.

   o  TPN: Tributary Port Number.

3.  YANG Data Model for OTN Topology

3.1.  OTN Topology Data Model Overview

   This document aims to describe the data model for OTN topology.  As a
   classic Traffic-engineering (TE) technology, OTN provide TDM
   switching in transport network [ITU-Tg709].  Therefore the YANG
   module presented in this document augments from a more generic
   Traffic Engineered (TE) network topology data model, i.e., the ietf-
   te-topology, as specified in [I-D.ietf-teas-yang-te-topo].  In
   section 6 of [I-D.ietf-teas-yang-te-topo], the guideline for
   augmenting TE topology model was provided, and in this draft we
   respectively augment the OTN attributes, TE bandwidth and TE label.
   Generic groupings defined in [I-D.ietf-ccamp-layer1-types] is reused
   as well in this document.  [RFC8345] describes a network topology
   model and provide the fundamental model for
   [I-D.ietf-teas-yang-te-topo].  However, this work is not directly
   augmenting [RFC8345].

   The entities and TE attributes, such as node, termination points and
   links, are still applicable for describing an OTN topology and the
   model presented in this document only specifies with technology-
   specific attributes/information.  The OTN-specific attributes in
   [RFC7139], including the TPN, TS and TSG, can be used to represent
   the bandwidth and label information.  These attributes have been
   specified in [I-D.ietf-ccamp-layer1-types], and used in this document
   for augmentation of the generic TE topology model.

   For different order of ODU in OTN technology, the te-bandwidth is
   augmented to allow specifying the type of ODU container and the
   number a link can support per priority level.  For example, for a
   ODU3 link, it may advertise 32*ODU0, 16*ODU1, 4*ODU2 available, or
   multiple ODUflex, assuming only a single priority level is supported.
   If one of ODU2 resource is taken to establish a ODU path, then the
   availability of this ODU link is updated as 24*ODU0, 12*ODU1, 3*ODU2,
   or multiple ODUflex available.  If there are equipment hardware




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   limitations, then a subset of potential ODU type SHALL be advertised.
   For instance, an ODU3 link may only support 4*ODU2.

   Note the model in this document re-uses some typedefs, identities and
   groupings defined in ietf-layer1-types, which is specified in
   [I-D.ietf-ccamp-layer1-types].

   The YANG module ietf-otn-topology defined in this document conforms
   to the Network Management Datastore Architecture (NMDA) defined in
   [RFC8342].

3.2.  YANG Tree for OTN topology


   module: ietf-otn-topology
     augment /nw:networks/nw:network/nw:network-types
               /tet:te-topology:
       +--rw otn-topology!
     augment /nw:networks/nw:network/nt:link/tet:te
               /tet:te-link-attributes:
       +--rw tsg?        identityref
       +--rw distance?   uint32
     augment /nw:networks/nw:network/nw:node
               /nt:termination-point/tet:te:
       +--rw client-svc!
          +--rw client-facing?             boolean
          +--rw supported-client-signal*   identityref
     augment /nw:networks/nw:network/nw:node
               /nt:termination-point/tet:te
               /tet:interface-switching-capability
               /tet:max-lsp-bandwidth/tet:te-bandwidth
               /tet:technology:
       +--:(otn)
          +--rw odu-type?                     identityref
          +--rw (oduflex-type)?
             +--:(generic)
             |  +--rw nominal-bit-rate        uint64
             +--:(cbr)
             |  +--rw client-type             identityref
             +--:(gfp-n-k)
             |  +--rw gfp-n                   uint8
             |  +--rw gfp-k?                  l1-types:gfp-k
             +--:(flexe-client)
             |  +--rw flexe-client
             |          l1-types:flexe-client-rate
             +--:(flexe-aware)
             |  +--rw flexe-aware-n           uint16
             +--:(packet)



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                +--rw opuflex-payload-rate    uint64
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:te-node-attributes
               /tet:connectivity-matrices/tet:path-constraints
               /tet:te-bandwidth/tet:technology:
       +--:(otn)
          +--rw odulist* [odu-type]
             +--rw odu-type    identityref
             +--rw number?     uint16
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:te-node-attributes
               /tet:connectivity-matrices
               /tet:connectivity-matrix/tet:path-constraints
               /tet:te-bandwidth/tet:technology:
       +--:(otn)
          +--rw odulist* [odu-type]
             +--rw odu-type    identityref
             +--rw number?     uint16
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:information-source-entry
               /tet:connectivity-matrices/tet:path-constraints
               /tet:te-bandwidth/tet:technology:
       +--:(otn)
          +--ro odulist* [odu-type]
             +--ro odu-type    identityref
             +--ro number?     uint16
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:information-source-entry
               /tet:connectivity-matrices
               /tet:connectivity-matrix/tet:path-constraints
               /tet:te-bandwidth/tet:technology:
       +--:(otn)
          +--ro odulist* [odu-type]
             +--ro odu-type    identityref
             +--ro number?     uint16
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:tunnel-termination-point
               /tet:client-layer-adaptation
               /tet:switching-capability/tet:te-bandwidth
               /tet:technology:
       +--:(otn)
          +--rw odulist* [odu-type]
             +--rw odu-type    identityref
             +--rw number?     uint16
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:tunnel-termination-point
               /tet:local-link-connectivities
               /tet:path-constraints/tet:te-bandwidth



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               /tet:technology:
       +--:(otn)
          +--rw odulist* [odu-type]
             +--rw odu-type    identityref
             +--rw number?     uint16
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:tunnel-termination-point
               /tet:local-link-connectivities
               /tet:local-link-connectivity
               /tet:path-constraints/tet:te-bandwidth
               /tet:technology:
       +--:(otn)
          +--rw odulist* [odu-type]
             +--rw odu-type    identityref
             +--rw number?     uint16
     augment /nw:networks/nw:network/nt:link/tet:te
               /tet:te-link-attributes
               /tet:interface-switching-capability
               /tet:max-lsp-bandwidth/tet:te-bandwidth
               /tet:technology:
       +--:(otn)
          +--rw odu-type?                     identityref
          +--rw (oduflex-type)?
             +--:(generic)
             |  +--rw nominal-bit-rate        uint64
             +--:(cbr)
             |  +--rw client-type             identityref
             +--:(gfp-n-k)
             |  +--rw gfp-n                   uint8
             |  +--rw gfp-k?                  l1-types:gfp-k
             +--:(flexe-client)
             |  +--rw flexe-client
             |          l1-types:flexe-client-rate
             +--:(flexe-aware)
             |  +--rw flexe-aware-n           uint16
             +--:(packet)
                +--rw opuflex-payload-rate    uint64
     augment /nw:networks/nw:network/nt:link/tet:te
               /tet:te-link-attributes/tet:max-link-bandwidth
               /tet:te-bandwidth/tet:technology:
       +--:(otn)
          +--rw odulist* [odu-type]
             +--rw odu-type    identityref
             +--rw number?     uint16
     augment /nw:networks/nw:network/nt:link/tet:te
               /tet:te-link-attributes
               /tet:max-resv-link-bandwidth/tet:te-bandwidth
               /tet:technology:



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       +--:(otn)
          +--rw odulist* [odu-type]
             +--rw odu-type    identityref
             +--rw number?     uint16
     augment /nw:networks/nw:network/nt:link/tet:te
               /tet:te-link-attributes/tet:unreserved-bandwidth
               /tet:te-bandwidth/tet:technology:
       +--:(otn)
          +--rw odulist* [odu-type]
             +--rw odu-type    identityref
             +--rw number?     uint16
     augment /nw:networks/nw:network/nt:link/tet:te
               /tet:information-source-entry
               /tet:interface-switching-capability
               /tet:max-lsp-bandwidth/tet:te-bandwidth
               /tet:technology:
       +--:(otn)
          +--ro odu-type?                     identityref
          +--ro (oduflex-type)?
             +--:(generic)
             |  +--ro nominal-bit-rate        uint64
             +--:(cbr)
             |  +--ro client-type             identityref
             +--:(gfp-n-k)
             |  +--ro gfp-n                   uint8
             |  +--ro gfp-k?                  l1-types:gfp-k
             +--:(flexe-client)
             |  +--ro flexe-client
             |          l1-types:flexe-client-rate
             +--:(flexe-aware)
             |  +--ro flexe-aware-n           uint16
             +--:(packet)
                +--ro opuflex-payload-rate    uint64
     augment /nw:networks/nw:network/nt:link/tet:te
               /tet:information-source-entry
               /tet:max-link-bandwidth/tet:te-bandwidth
               /tet:technology:
       +--:(otn)
          +--ro odulist* [odu-type]
             +--ro odu-type    identityref
             +--ro number?     uint16
     augment /nw:networks/nw:network/nt:link/tet:te
               /tet:information-source-entry
               /tet:max-resv-link-bandwidth/tet:te-bandwidth
               /tet:technology:
       +--:(otn)
          +--ro odulist* [odu-type]
             +--ro odu-type    identityref



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             +--ro number?     uint16
     augment /nw:networks/nw:network/nt:link/tet:te
               /tet:information-source-entry
               /tet:unreserved-bandwidth/tet:te-bandwidth
               /tet:technology:
       +--:(otn)
          +--ro odulist* [odu-type]
             +--ro odu-type    identityref
             +--ro number?     uint16
     augment /nw:networks/tet:te/tet:templates
               /tet:link-template/tet:te-link-attributes
               /tet:interface-switching-capability
               /tet:max-lsp-bandwidth/tet:te-bandwidth
               /tet:technology:
       +--:(otn)
          +--rw odu-type?                     identityref
          +--rw (oduflex-type)?
             +--:(generic)
             |  +--rw nominal-bit-rate        uint64
             +--:(cbr)
             |  +--rw client-type             identityref
             +--:(gfp-n-k)
             |  +--rw gfp-n                   uint8
             |  +--rw gfp-k?                  l1-types:gfp-k
             +--:(flexe-client)
             |  +--rw flexe-client
             |          l1-types:flexe-client-rate
             +--:(flexe-aware)
             |  +--rw flexe-aware-n           uint16
             +--:(packet)
                +--rw opuflex-payload-rate    uint64
     augment /nw:networks/tet:te/tet:templates
               /tet:link-template/tet:te-link-attributes
               /tet:max-link-bandwidth/tet:te-bandwidth
               /tet:technology:
       +--:(otn)
          +--rw odulist* [odu-type]
             +--rw odu-type    identityref
             +--rw number?     uint16
     augment /nw:networks/tet:te/tet:templates
               /tet:link-template/tet:te-link-attributes
               /tet:max-resv-link-bandwidth/tet:te-bandwidth
               /tet:technology:
       +--:(otn)
          +--rw odulist* [odu-type]
             +--rw odu-type    identityref
             +--rw number?     uint16
     augment /nw:networks/tet:te/tet:templates



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               /tet:link-template/tet:te-link-attributes
               /tet:unreserved-bandwidth/tet:te-bandwidth
               /tet:technology:
       +--:(otn)
          +--rw odulist* [odu-type]
             +--rw odu-type    identityref
             +--rw number?     uint16
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:te-node-attributes
               /tet:connectivity-matrices
               /tet:label-restrictions/tet:label-restriction:
       +--rw range-type?      l1-types:otn-label-range-type
       +--rw tsg?             identityref
       +--rw odu-type-list*   identityref
       +--rw priority?        uint8
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:te-node-attributes
               /tet:connectivity-matrices
               /tet:label-restrictions/tet:label-restriction
               /tet:label-start/tet:te-label/tet:technology:
       +--:(otn)
          +--rw (range-type)?
             +--:(trib-port)
             |  +--rw otn-tpn?   l1-types:otn-tpn
             +--:(trib-slot)
                +--rw otn-ts?    l1-types:otn-ts
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:te-node-attributes
               /tet:connectivity-matrices
               /tet:label-restrictions/tet:label-restriction
               /tet:label-end/tet:te-label/tet:technology:
       +--:(otn)
          +--rw (range-type)?
             +--:(trib-port)
             |  +--rw otn-tpn?   l1-types:otn-tpn
             +--:(trib-slot)
                +--rw otn-ts?    l1-types:otn-ts
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:te-node-attributes
               /tet:connectivity-matrices
               /tet:label-restrictions/tet:label-restriction
               /tet:label-step/tet:technology:
       +--:(otn)
          +--rw (range-type)?
             +--:(trib-port)
             |  +--rw otn-tpn?   l1-types:otn-tpn
             +--:(trib-slot)
                +--rw otn-ts?    l1-types:otn-ts



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     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:te-node-attributes
               /tet:connectivity-matrices/tet:underlay
               /tet:primary-path/tet:path-element/tet:type
               /tet:label/tet:label-hop/tet:te-label
               /tet:technology:
       +--:(otn)
          +--rw otn-tpn?   l1-types:otn-tpn
          +--rw tsg?       identityref
          +--rw ts-list?   string
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:te-node-attributes
               /tet:connectivity-matrices/tet:underlay
               /tet:backup-path/tet:path-element/tet:type
               /tet:label/tet:label-hop/tet:te-label
               /tet:technology:
       +--:(otn)
          +--rw otn-tpn?   l1-types:otn-tpn
          +--rw tsg?       identityref
          +--rw ts-list?   string
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:te-node-attributes
               /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:
       +--:(otn)
          +--rw otn-tpn?   l1-types:otn-tpn
          +--rw tsg?       identityref
          +--rw ts-list?   string
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:te-node-attributes
               /tet:connectivity-matrices/tet:optimizations
               /tet:algorithm/tet:metric
               /tet:optimization-metric
               /tet:explicit-route-include-objects
               /tet:route-object-include-object/tet:type
               /tet:label/tet:label-hop/tet:te-label
               /tet:technology:
       +--:(otn)
          +--rw otn-tpn?   l1-types:otn-tpn
          +--rw tsg?       identityref
          +--rw ts-list?   string
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:te-node-attributes



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               /tet:connectivity-matrices/tet:path-properties
               /tet:path-route-objects/tet:path-route-object
               /tet:type/tet:label/tet:label-hop/tet:te-label
               /tet:technology:
       +--:(otn)
          +--ro otn-tpn?   l1-types:otn-tpn
          +--ro tsg?       identityref
          +--ro ts-list?   string
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:te-node-attributes
               /tet:connectivity-matrices
               /tet:connectivity-matrix/tet:from
               /tet:label-restrictions/tet:label-restriction:
       +--rw range-type?      l1-types:otn-label-range-type
       +--rw tsg?             identityref
       +--rw odu-type-list*   identityref
       +--rw priority?        uint8
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:te-node-attributes
               /tet:connectivity-matrices
               /tet:connectivity-matrix/tet:from
               /tet:label-restrictions/tet:label-restriction
               /tet:label-start/tet:te-label/tet:technology:
       +--:(otn)
          +--rw (range-type)?
             +--:(trib-port)
             |  +--rw otn-tpn?   l1-types:otn-tpn
             +--:(trib-slot)
                +--rw otn-ts?    l1-types:otn-ts
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:te-node-attributes
               /tet:connectivity-matrices
               /tet:connectivity-matrix/tet:from
               /tet:label-restrictions/tet:label-restriction
               /tet:label-end/tet:te-label/tet:technology:
       +--:(otn)
          +--rw (range-type)?
             +--:(trib-port)
             |  +--rw otn-tpn?   l1-types:otn-tpn
             +--:(trib-slot)
                +--rw otn-ts?    l1-types:otn-ts
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:te-node-attributes
               /tet:connectivity-matrices
               /tet:connectivity-matrix/tet:from
               /tet:label-restrictions/tet:label-restriction
               /tet:label-step/tet:technology:
       +--:(otn)



Zheng, et al.          Expires September 10, 2020              [Page 12]


Internet-Draft           OTN Topology YANG Model              March 2020


          +--rw (range-type)?
             +--:(trib-port)
             |  +--rw otn-tpn?   l1-types:otn-tpn
             +--:(trib-slot)
                +--rw otn-ts?    l1-types:otn-ts
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:te-node-attributes
               /tet:connectivity-matrices
               /tet:connectivity-matrix/tet:to
               /tet:label-restrictions/tet:label-restriction:
       +--rw range-type?      l1-types:otn-label-range-type
       +--rw tsg?             identityref
       +--rw odu-type-list*   identityref
       +--rw priority?        uint8
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:te-node-attributes
               /tet:connectivity-matrices
               /tet:connectivity-matrix/tet:to
               /tet:label-restrictions/tet:label-restriction
               /tet:label-start/tet:te-label/tet:technology:
       +--:(otn)
          +--rw (range-type)?
             +--:(trib-port)
             |  +--rw otn-tpn?   l1-types:otn-tpn
             +--:(trib-slot)
                +--rw otn-ts?    l1-types:otn-ts
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:te-node-attributes
               /tet:connectivity-matrices
               /tet:connectivity-matrix/tet:to
               /tet:label-restrictions/tet:label-restriction
               /tet:label-end/tet:te-label/tet:technology:
       +--:(otn)
          +--rw (range-type)?
             +--:(trib-port)
             |  +--rw otn-tpn?   l1-types:otn-tpn
             +--:(trib-slot)
                +--rw otn-ts?    l1-types:otn-ts
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:te-node-attributes
               /tet:connectivity-matrices
               /tet:connectivity-matrix/tet:to
               /tet:label-restrictions/tet:label-restriction
               /tet:label-step/tet:technology:
       +--:(otn)
          +--rw (range-type)?
             +--:(trib-port)
             |  +--rw otn-tpn?   l1-types:otn-tpn



Zheng, et al.          Expires September 10, 2020              [Page 13]


Internet-Draft           OTN Topology YANG Model              March 2020


             +--:(trib-slot)
                +--rw otn-ts?    l1-types:otn-ts
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:te-node-attributes
               /tet:connectivity-matrices
               /tet:connectivity-matrix/tet:underlay
               /tet:primary-path/tet:path-element/tet:type
               /tet:label/tet:label-hop/tet:te-label
               /tet:technology:
       +--:(otn)
          +--rw otn-tpn?   l1-types:otn-tpn
          +--rw tsg?       identityref
          +--rw ts-list?   string
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:te-node-attributes
               /tet:connectivity-matrices
               /tet:connectivity-matrix/tet:underlay
               /tet:backup-path/tet:path-element/tet:type
               /tet:label/tet:label-hop/tet:te-label
               /tet:technology:
       +--:(otn)
          +--rw otn-tpn?   l1-types:otn-tpn
          +--rw tsg?       identityref
          +--rw ts-list?   string
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:te-node-attributes
               /tet:connectivity-matrices
               /tet:connectivity-matrix/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:
       +--:(otn)
          +--rw otn-tpn?   l1-types:otn-tpn
          +--rw tsg?       identityref
          +--rw ts-list?   string
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:te-node-attributes
               /tet:connectivity-matrices
               /tet:connectivity-matrix/tet:optimizations
               /tet:algorithm/tet:metric
               /tet:optimization-metric
               /tet:explicit-route-include-objects
               /tet:route-object-include-object/tet:type
               /tet:label/tet:label-hop/tet:te-label
               /tet:technology:



Zheng, et al.          Expires September 10, 2020              [Page 14]


Internet-Draft           OTN Topology YANG Model              March 2020


       +--:(otn)
          +--rw otn-tpn?   l1-types:otn-tpn
          +--rw tsg?       identityref
          +--rw ts-list?   string
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:te-node-attributes
               /tet:connectivity-matrices
               /tet:connectivity-matrix/tet:path-properties
               /tet:path-route-objects/tet:path-route-object
               /tet:type/tet:label/tet:label-hop/tet:te-label
               /tet:technology:
       +--:(otn)
          +--ro otn-tpn?   l1-types:otn-tpn
          +--ro tsg?       identityref
          +--ro ts-list?   string
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:information-source-entry
               /tet:connectivity-matrices
               /tet:label-restrictions/tet:label-restriction:
       +--ro range-type?      l1-types:otn-label-range-type
       +--ro tsg?             identityref
       +--ro odu-type-list*   identityref
       +--ro priority?        uint8
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:information-source-entry
               /tet:connectivity-matrices
               /tet:label-restrictions/tet:label-restriction
               /tet:label-start/tet:te-label/tet:technology:
       +--:(otn)
          +--ro (range-type)?
             +--:(trib-port)
             |  +--ro otn-tpn?   l1-types:otn-tpn
             +--:(trib-slot)
                +--ro otn-ts?    l1-types:otn-ts
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:information-source-entry
               /tet:connectivity-matrices
               /tet:label-restrictions/tet:label-restriction
               /tet:label-end/tet:te-label/tet:technology:
       +--:(otn)
          +--ro (range-type)?
             +--:(trib-port)
             |  +--ro otn-tpn?   l1-types:otn-tpn
             +--:(trib-slot)
                +--ro otn-ts?    l1-types:otn-ts
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:information-source-entry
               /tet:connectivity-matrices



Zheng, et al.          Expires September 10, 2020              [Page 15]


Internet-Draft           OTN Topology YANG Model              March 2020


               /tet:label-restrictions/tet:label-restriction
               /tet:label-step/tet:technology:
       +--:(otn)
          +--ro (range-type)?
             +--:(trib-port)
             |  +--ro otn-tpn?   l1-types:otn-tpn
             +--:(trib-slot)
                +--ro otn-ts?    l1-types:otn-ts
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:information-source-entry
               /tet:connectivity-matrices/tet:underlay
               /tet:primary-path/tet:path-element/tet:type
               /tet:label/tet:label-hop/tet:te-label
               /tet:technology:
       +--:(otn)
          +--ro otn-tpn?   l1-types:otn-tpn
          +--ro tsg?       identityref
          +--ro ts-list?   string
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:information-source-entry
               /tet:connectivity-matrices/tet:underlay
               /tet:backup-path/tet:path-element/tet:type
               /tet:label/tet:label-hop/tet:te-label
               /tet:technology:
       +--:(otn)
          +--ro otn-tpn?   l1-types:otn-tpn
          +--ro tsg?       identityref
          +--ro ts-list?   string
     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:
       +--:(otn)
          +--ro otn-tpn?   l1-types:otn-tpn
          +--ro tsg?       identityref
          +--ro ts-list?   string
     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-include-objects
               /tet:route-object-include-object/tet:type



Zheng, et al.          Expires September 10, 2020              [Page 16]


Internet-Draft           OTN Topology YANG Model              March 2020


               /tet:label/tet:label-hop/tet:te-label
               /tet:technology:
       +--:(otn)
          +--ro otn-tpn?   l1-types:otn-tpn
          +--ro tsg?       identityref
          +--ro ts-list?   string
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:information-source-entry
               /tet:connectivity-matrices/tet:path-properties
               /tet:path-route-objects/tet:path-route-object
               /tet:type/tet:label/tet:label-hop/tet:te-label
               /tet:technology:
       +--:(otn)
          +--ro otn-tpn?   l1-types:otn-tpn
          +--ro tsg?       identityref
          +--ro ts-list?   string
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:information-source-entry
               /tet:connectivity-matrices
               /tet:connectivity-matrix/tet:from
               /tet:label-restrictions/tet:label-restriction:
       +--ro range-type?      l1-types:otn-label-range-type
       +--ro tsg?             identityref
       +--ro odu-type-list*   identityref
       +--ro priority?        uint8
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:information-source-entry
               /tet:connectivity-matrices
               /tet:connectivity-matrix/tet:from
               /tet:label-restrictions/tet:label-restriction
               /tet:label-start/tet:te-label/tet:technology:
       +--:(otn)
          +--ro (range-type)?
             +--:(trib-port)
             |  +--ro otn-tpn?   l1-types:otn-tpn
             +--:(trib-slot)
                +--ro otn-ts?    l1-types:otn-ts
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:information-source-entry
               /tet:connectivity-matrices
               /tet:connectivity-matrix/tet:from
               /tet:label-restrictions/tet:label-restriction
               /tet:label-end/tet:te-label/tet:technology:
       +--:(otn)
          +--ro (range-type)?
             +--:(trib-port)
             |  +--ro otn-tpn?   l1-types:otn-tpn
             +--:(trib-slot)



Zheng, et al.          Expires September 10, 2020              [Page 17]


Internet-Draft           OTN Topology YANG Model              March 2020


                +--ro otn-ts?    l1-types:otn-ts
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:information-source-entry
               /tet:connectivity-matrices
               /tet:connectivity-matrix/tet:from
               /tet:label-restrictions/tet:label-restriction
               /tet:label-step/tet:technology:
       +--:(otn)
          +--ro (range-type)?
             +--:(trib-port)
             |  +--ro otn-tpn?   l1-types:otn-tpn
             +--:(trib-slot)
                +--ro otn-ts?    l1-types:otn-ts
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:information-source-entry
               /tet:connectivity-matrices
               /tet:connectivity-matrix/tet:to
               /tet:label-restrictions/tet:label-restriction:
       +--ro range-type?      l1-types:otn-label-range-type
       +--ro tsg?             identityref
       +--ro odu-type-list*   identityref
       +--ro priority?        uint8
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:information-source-entry
               /tet:connectivity-matrices
               /tet:connectivity-matrix/tet:to
               /tet:label-restrictions/tet:label-restriction
               /tet:label-start/tet:te-label/tet:technology:
       +--:(otn)
          +--ro (range-type)?
             +--:(trib-port)
             |  +--ro otn-tpn?   l1-types:otn-tpn
             +--:(trib-slot)
                +--ro otn-ts?    l1-types:otn-ts
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:information-source-entry
               /tet:connectivity-matrices
               /tet:connectivity-matrix/tet:to
               /tet:label-restrictions/tet:label-restriction
               /tet:label-end/tet:te-label/tet:technology:
       +--:(otn)
          +--ro (range-type)?
             +--:(trib-port)
             |  +--ro otn-tpn?   l1-types:otn-tpn
             +--:(trib-slot)
                +--ro otn-ts?    l1-types:otn-ts
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:information-source-entry



Zheng, et al.          Expires September 10, 2020              [Page 18]


Internet-Draft           OTN Topology YANG Model              March 2020


               /tet:connectivity-matrices
               /tet:connectivity-matrix/tet:to
               /tet:label-restrictions/tet:label-restriction
               /tet:label-step/tet:technology:
       +--:(otn)
          +--ro (range-type)?
             +--:(trib-port)
             |  +--ro otn-tpn?   l1-types:otn-tpn
             +--:(trib-slot)
                +--ro otn-ts?    l1-types:otn-ts
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:information-source-entry
               /tet:connectivity-matrices
               /tet:connectivity-matrix/tet:underlay
               /tet:primary-path/tet:path-element/tet:type
               /tet:label/tet:label-hop/tet:te-label
               /tet:technology:
       +--:(otn)
          +--ro otn-tpn?   l1-types:otn-tpn
          +--ro tsg?       identityref
          +--ro ts-list?   string
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:information-source-entry
               /tet:connectivity-matrices
               /tet:connectivity-matrix/tet:underlay
               /tet:backup-path/tet:path-element/tet:type
               /tet:label/tet:label-hop/tet:te-label
               /tet:technology:
       +--:(otn)
          +--ro otn-tpn?   l1-types:otn-tpn
          +--ro tsg?       identityref
          +--ro ts-list?   string
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:information-source-entry
               /tet:connectivity-matrices
               /tet:connectivity-matrix/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:
       +--:(otn)
          +--ro otn-tpn?   l1-types:otn-tpn
          +--ro tsg?       identityref
          +--ro ts-list?   string
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:information-source-entry



Zheng, et al.          Expires September 10, 2020              [Page 19]


Internet-Draft           OTN Topology YANG Model              March 2020


               /tet:connectivity-matrices
               /tet:connectivity-matrix/tet:optimizations
               /tet:algorithm/tet:metric
               /tet:optimization-metric
               /tet:explicit-route-include-objects
               /tet:route-object-include-object/tet:type
               /tet:label/tet:label-hop/tet:te-label
               /tet:technology:
       +--:(otn)
          +--ro otn-tpn?   l1-types:otn-tpn
          +--ro tsg?       identityref
          +--ro ts-list?   string
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:information-source-entry
               /tet:connectivity-matrices
               /tet:connectivity-matrix/tet:path-properties
               /tet:path-route-objects/tet:path-route-object
               /tet:type/tet:label/tet:label-hop/tet:te-label
               /tet:technology:
       +--:(otn)
          +--ro otn-tpn?   l1-types:otn-tpn
          +--ro tsg?       identityref
          +--ro ts-list?   string
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:tunnel-termination-point
               /tet:local-link-connectivities
               /tet:label-restrictions/tet:label-restriction:
       +--rw range-type?      l1-types:otn-label-range-type
       +--rw tsg?             identityref
       +--rw odu-type-list*   identityref
       +--rw priority?        uint8
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:tunnel-termination-point
               /tet:local-link-connectivities
               /tet:label-restrictions/tet:label-restriction
               /tet:label-start/tet:te-label/tet:technology:
       +--:(otn)
          +--rw (range-type)?
             +--:(trib-port)
             |  +--rw otn-tpn?   l1-types:otn-tpn
             +--:(trib-slot)
                +--rw otn-ts?    l1-types:otn-ts
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:tunnel-termination-point
               /tet:local-link-connectivities
               /tet:label-restrictions/tet:label-restriction
               /tet:label-end/tet:te-label/tet:technology:
       +--:(otn)



Zheng, et al.          Expires September 10, 2020              [Page 20]


Internet-Draft           OTN Topology YANG Model              March 2020


          +--rw (range-type)?
             +--:(trib-port)
             |  +--rw otn-tpn?   l1-types:otn-tpn
             +--:(trib-slot)
                +--rw otn-ts?    l1-types:otn-ts
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:tunnel-termination-point
               /tet:local-link-connectivities
               /tet:label-restrictions/tet:label-restriction
               /tet:label-step/tet:technology:
       +--:(otn)
          +--rw (range-type)?
             +--:(trib-port)
             |  +--rw otn-tpn?   l1-types:otn-tpn
             +--:(trib-slot)
                +--rw otn-ts?    l1-types:otn-ts
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:tunnel-termination-point
               /tet:local-link-connectivities/tet:underlay
               /tet:primary-path/tet:path-element/tet:type
               /tet:label/tet:label-hop/tet:te-label
               /tet:technology:
       +--:(otn)
          +--rw otn-tpn?   l1-types:otn-tpn
          +--rw tsg?       identityref
          +--rw ts-list?   string
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:tunnel-termination-point
               /tet:local-link-connectivities/tet:underlay
               /tet:backup-path/tet:path-element/tet:type
               /tet:label/tet:label-hop/tet:te-label
               /tet:technology:
       +--:(otn)
          +--rw otn-tpn?   l1-types:otn-tpn
          +--rw tsg?       identityref
          +--rw ts-list?   string
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:tunnel-termination-point
               /tet:local-link-connectivities/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:
       +--:(otn)
          +--rw otn-tpn?   l1-types:otn-tpn
          +--rw tsg?       identityref



Zheng, et al.          Expires September 10, 2020              [Page 21]


Internet-Draft           OTN Topology YANG Model              March 2020


          +--rw ts-list?   string
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:tunnel-termination-point
               /tet:local-link-connectivities/tet:optimizations
               /tet:algorithm/tet:metric
               /tet:optimization-metric
               /tet:explicit-route-include-objects
               /tet:route-object-include-object/tet:type
               /tet:label/tet:label-hop/tet:te-label
               /tet:technology:
       +--:(otn)
          +--rw otn-tpn?   l1-types:otn-tpn
          +--rw tsg?       identityref
          +--rw ts-list?   string
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:tunnel-termination-point
               /tet:local-link-connectivities
               /tet:path-properties/tet:path-route-objects
               /tet:path-route-object/tet:type/tet:label
               /tet:label-hop/tet:te-label/tet:technology:
       +--:(otn)
          +--ro otn-tpn?   l1-types:otn-tpn
          +--ro tsg?       identityref
          +--ro ts-list?   string
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:tunnel-termination-point
               /tet:local-link-connectivities
               /tet:local-link-connectivity
               /tet:label-restrictions/tet:label-restriction:
       +--rw range-type?      l1-types:otn-label-range-type
       +--rw tsg?             identityref
       +--rw odu-type-list*   identityref
       +--rw priority?        uint8
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:tunnel-termination-point
               /tet:local-link-connectivities
               /tet:local-link-connectivity
               /tet:label-restrictions/tet:label-restriction
               /tet:label-start/tet:te-label/tet:technology:
       +--:(otn)
          +--rw (range-type)?
             +--:(trib-port)
             |  +--rw otn-tpn?   l1-types:otn-tpn
             +--:(trib-slot)
                +--rw otn-ts?    l1-types:otn-ts
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:tunnel-termination-point
               /tet:local-link-connectivities



Zheng, et al.          Expires September 10, 2020              [Page 22]


Internet-Draft           OTN Topology YANG Model              March 2020


               /tet:local-link-connectivity
               /tet:label-restrictions/tet:label-restriction
               /tet:label-end/tet:te-label/tet:technology:
       +--:(otn)
          +--rw (range-type)?
             +--:(trib-port)
             |  +--rw otn-tpn?   l1-types:otn-tpn
             +--:(trib-slot)
                +--rw otn-ts?    l1-types:otn-ts
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:tunnel-termination-point
               /tet:local-link-connectivities
               /tet:local-link-connectivity
               /tet:label-restrictions/tet:label-restriction
               /tet:label-step/tet:technology:
       +--:(otn)
          +--rw (range-type)?
             +--:(trib-port)
             |  +--rw otn-tpn?   l1-types:otn-tpn
             +--:(trib-slot)
                +--rw otn-ts?    l1-types:otn-ts
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:tunnel-termination-point
               /tet:local-link-connectivities
               /tet:local-link-connectivity/tet:underlay
               /tet:primary-path/tet:path-element/tet:type
               /tet:label/tet:label-hop/tet:te-label
               /tet:technology:
       +--:(otn)
          +--rw otn-tpn?   l1-types:otn-tpn
          +--rw tsg?       identityref
          +--rw ts-list?   string
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:tunnel-termination-point
               /tet:local-link-connectivities
               /tet:local-link-connectivity/tet:underlay
               /tet:backup-path/tet:path-element/tet:type
               /tet:label/tet:label-hop/tet:te-label
               /tet:technology:
       +--:(otn)
          +--rw otn-tpn?   l1-types:otn-tpn
          +--rw tsg?       identityref
          +--rw ts-list?   string
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:tunnel-termination-point
               /tet:local-link-connectivities
               /tet:local-link-connectivity/tet:optimizations
               /tet:algorithm/tet:metric



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               /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:
       +--:(otn)
          +--rw otn-tpn?   l1-types:otn-tpn
          +--rw tsg?       identityref
          +--rw ts-list?   string
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:tunnel-termination-point
               /tet:local-link-connectivities
               /tet:local-link-connectivity/tet:optimizations
               /tet:algorithm/tet:metric
               /tet:optimization-metric
               /tet:explicit-route-include-objects
               /tet:route-object-include-object/tet:type
               /tet:label/tet:label-hop/tet:te-label
               /tet:technology:
       +--:(otn)
          +--rw otn-tpn?   l1-types:otn-tpn
          +--rw tsg?       identityref
          +--rw ts-list?   string
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:tunnel-termination-point
               /tet:local-link-connectivities
               /tet:local-link-connectivity/tet:path-properties
               /tet:path-route-objects/tet:path-route-object
               /tet:type/tet:label/tet:label-hop/tet:te-label
               /tet:technology:
       +--:(otn)
          +--ro otn-tpn?   l1-types:otn-tpn
          +--ro tsg?       identityref
          +--ro ts-list?   string
     augment /nw:networks/nw:network/nt:link/tet:te
               /tet:te-link-attributes/tet:underlay
               /tet:primary-path/tet:path-element/tet:type
               /tet:label/tet:label-hop/tet:te-label
               /tet:technology:
       +--:(otn)
          +--rw otn-tpn?   l1-types:otn-tpn
          +--rw tsg?       identityref
          +--rw ts-list?   string
     augment /nw:networks/nw:network/nt:link/tet:te
               /tet:te-link-attributes/tet:underlay
               /tet:backup-path/tet:path-element/tet:type
               /tet:label/tet:label-hop/tet:te-label
               /tet:technology:



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       +--:(otn)
          +--rw otn-tpn?   l1-types:otn-tpn
          +--rw tsg?       identityref
          +--rw ts-list?   string
     augment /nw:networks/nw:network/nt:link/tet:te
               /tet:te-link-attributes/tet:label-restrictions
               /tet:label-restriction:
       +--rw range-type?      l1-types:otn-label-range-type
       +--rw tsg?             identityref
       +--rw odu-type-list*   identityref
       +--rw priority?        uint8
     augment /nw:networks/nw:network/nt:link/tet:te
               /tet:te-link-attributes/tet:label-restrictions
               /tet:label-restriction/tet:label-start
               /tet:te-label/tet:technology:
       +--:(otn)
          +--rw (range-type)?
             +--:(trib-port)
             |  +--rw otn-tpn?   l1-types:otn-tpn
             +--:(trib-slot)
                +--rw otn-ts?    l1-types:otn-ts
     augment /nw:networks/nw:network/nt:link/tet:te
               /tet:te-link-attributes/tet:label-restrictions
               /tet:label-restriction/tet:label-end
               /tet:te-label/tet:technology:
       +--:(otn)
          +--rw (range-type)?
             +--:(trib-port)
             |  +--rw otn-tpn?   l1-types:otn-tpn
             +--:(trib-slot)
                +--rw otn-ts?    l1-types:otn-ts
     augment /nw:networks/nw:network/nt:link/tet:te
               /tet:te-link-attributes/tet:label-restrictions
               /tet:label-restriction/tet:label-step
               /tet:technology:
       +--:(otn)
          +--rw (range-type)?
             +--:(trib-port)
             |  +--rw otn-tpn?   l1-types:otn-tpn
             +--:(trib-slot)
                +--rw otn-ts?    l1-types:otn-ts
     augment /nw:networks/nw:network/nt:link/tet:te
               /tet:information-source-entry
               /tet:label-restrictions/tet:label-restriction:
       +--ro range-type?      l1-types:otn-label-range-type
       +--ro tsg?             identityref
       +--ro odu-type-list*   identityref
       +--ro priority?        uint8



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     augment /nw:networks/nw:network/nt:link/tet:te
               /tet:information-source-entry
               /tet:label-restrictions/tet:label-restriction
               /tet:label-start/tet:te-label/tet:technology:
       +--:(otn)
          +--ro (range-type)?
             +--:(trib-port)
             |  +--ro otn-tpn?   l1-types:otn-tpn
             +--:(trib-slot)
                +--ro otn-ts?    l1-types:otn-ts
     augment /nw:networks/nw:network/nt:link/tet:te
               /tet:information-source-entry
               /tet:label-restrictions/tet:label-restriction
               /tet:label-end/tet:te-label/tet:technology:
       +--:(otn)
          +--ro (range-type)?
             +--:(trib-port)
             |  +--ro otn-tpn?   l1-types:otn-tpn
             +--:(trib-slot)
                +--ro otn-ts?    l1-types:otn-ts
     augment /nw:networks/nw:network/nt:link/tet:te
               /tet:information-source-entry
               /tet:label-restrictions/tet:label-restriction
               /tet:label-step/tet:technology:
       +--:(otn)
          +--ro (range-type)?
             +--:(trib-port)
             |  +--ro otn-tpn?   l1-types:otn-tpn
             +--:(trib-slot)
                +--ro otn-ts?    l1-types:otn-ts
     augment /nw:networks/tet:te/tet:templates
               /tet:link-template/tet:te-link-attributes
               /tet:underlay/tet:primary-path/tet:path-element
               /tet:type/tet:label/tet:label-hop/tet:te-label
               /tet:technology:
       +--:(otn)
          +--rw otn-tpn?   l1-types:otn-tpn
          +--rw tsg?       identityref
          +--rw ts-list?   string
     augment /nw:networks/tet:te/tet:templates
               /tet:link-template/tet:te-link-attributes
               /tet:underlay/tet:backup-path/tet:path-element
               /tet:type/tet:label/tet:label-hop/tet:te-label
               /tet:technology:
       +--:(otn)
          +--rw otn-tpn?   l1-types:otn-tpn
          +--rw tsg?       identityref
          +--rw ts-list?   string



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     augment /nw:networks/tet:te/tet:templates
               /tet:link-template/tet:te-link-attributes
               /tet:label-restrictions/tet:label-restriction:
       +--rw range-type?      l1-types:otn-label-range-type
       +--rw tsg?             identityref
       +--rw odu-type-list*   identityref
       +--rw priority?        uint8
     augment /nw:networks/tet:te/tet:templates
               /tet:link-template/tet:te-link-attributes
               /tet:label-restrictions/tet:label-restriction
               /tet:label-start/tet:te-label/tet:technology:
       +--:(otn)
          +--rw (range-type)?
             +--:(trib-port)
             |  +--rw otn-tpn?   l1-types:otn-tpn
             +--:(trib-slot)
                +--rw otn-ts?    l1-types:otn-ts
     augment /nw:networks/tet:te/tet:templates
               /tet:link-template/tet:te-link-attributes
               /tet:label-restrictions/tet:label-restriction
               /tet:label-end/tet:te-label/tet:technology:
       +--:(otn)
          +--rw (range-type)?
             +--:(trib-port)
             |  +--rw otn-tpn?   l1-types:otn-tpn
             +--:(trib-slot)
                +--rw otn-ts?    l1-types:otn-ts
     augment /nw:networks/tet:te/tet:templates
               /tet:link-template/tet:te-link-attributes
               /tet:label-restrictions/tet:label-restriction
               /tet:label-step/tet:technology:
       +--:(otn)
          +--rw (range-type)?
             +--:(trib-port)
             |  +--rw otn-tpn?   l1-types:otn-tpn
             +--:(trib-slot)
                +--rw otn-ts?    l1-types:otn-ts



4.  The YANG Code


 <CODE BEGINS> file "ietf-otn-topology@2020-03-09.yang"
 module ietf-otn-topology {
   yang-version 1.1;

   namespace "urn:ietf:params:xml:ns:yang:ietf-otn-topology";



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   prefix "otntopo";

   import ietf-network {
     prefix "nw";
     reference "RFC 8345: A YANG Data Model for Network Topologies";
   }

   import ietf-network-topology {
     prefix "nt";
     reference "RFC 8345: A YANG Data Model for Network Topologies";
   }

   import ietf-te-topology {
     prefix "tet";
     reference
       "I-D.ietf-teas-yang-te-topo: YANG Data Model for
        Traffic Engineering (TE) Topologies";
   }

   import ietf-layer1-types {
     prefix "l1-types";
     reference
       "I-D.ietf-ccamp-layer1-types: A YANG Data Model
        for Layer 1 Types";
   }

   organization
     "IETF CCAMP Working Group";
   contact
     "WG Web: <http://tools.ietf.org/wg/ccamp/>
      WG List: <mailto:ccamp@ietf.org>

      Editor: Haomian Zheng
              <mailto:zhenghaomian@huawei.com>

      Editor: Italo Busi
              <mailto:italo.busi@huawei.com>

      Editor: Xufeng Liu
              <mailto:xufeng.liu.ietf@gmail.com>

      Editor: Sergio Belotti
              <mailto:sergio.belotti@nokia.com>

      Editor: Oscar Gonzalez de Dios
              <mailto:oscar.gonzalezdedios@telefonica.com>";

   description



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     "This module defines a protocol independent Layer 1/ODU topology
      data model. The model fully conforms
      to the Network Management Datastore Architecture (NMDA).

      Copyright (c) 2020 IETF Trust and the persons
      identified as authors of the code.  All rights reserved.

      Redistribution and use in source and binary forms, with or
      without modification, is permitted pursuant to, and subject
      to the license terms contained in, the Simplified BSD License
      set forth in Section 4.c of the IETF Trust's Legal Provisions
      Relating to IETF Documents
      (https://trustee.ietf.org/license-info).
      This version of this YANG module is part of RFC XXXX; see
      the RFC itself for full legal notices.";

   revision 2020-03-09 {
     description
       "Initial Revision";
     reference
       "RFC XXXX: A YANG Data Model for Optical Transport Network
       Topology";
     // RFC Ed.: replace XXXX with actual RFC number, update date
     // information and remove this note
   }

  /*
   * Groupings
   */

   grouping otn-link-attributes {
     description "link attributes for OTN";

     leaf tsg {
       type identityref {
         base l1-types:tributary-slot-granularity;
       }
       description "Tributary slot granularity.";
       reference
         "G.709/Y.1331, February 2016: Interfaces for the
          Optical Transport Network (OTN)";
     }
     leaf distance {
       type uint32;
       description "distance in the unit of kilometers";
     }
   }




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   grouping otn-tp-attributes {
     description "tp attributes for OTN";

     container client-svc {
       presence "client-facing LTP.";
       description
         "OTN LTP Service attributes.";

       leaf client-facing {
         type boolean;
         default 'false';
         description
           "Indicates whether this LTP is a client-facing LTP.";
       }
       leaf-list supported-client-signal {
         type identityref {
           base l1-types:client-signal;
         }
         description
           "List of client signal types supported by the LTP.";
       }
     }
   }

  /*
   * Data nodes
   */
   augment "/nw:networks/nw:network/nw:network-types/"
         + "tet:te-topology" {
     container otn-topology {
       presence "indicates a topology type of Optical Transport
                 Network (OTN)-electrical layer.";
       description "otn topology type";
     }
     description "augment network types to include otn newtork";
   }

   augment "/nw:networks/nw:network/nt:link/tet:te/"
         + "tet:te-link-attributes" {
     when "../../../nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment only for otn network.";
     }
     description "Augment link configuration";
     uses otn-link-attributes;
   }

   augment "/nw:networks/nw:network/nw:node/nt:termination-point/"



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         + "tet:te" {
     when "../../../nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment only for otn network";
     }
     description "OTN TP attributes config in ODU topology.";
     uses otn-tp-attributes;
   }

   /*
    * Augment TE bandwidth
    */

   /* Augment maximum LSP bandwidth of link terminationpoint (LTP) */
   augment "/nw:networks/nw:network/nw:node/nt:termination-point/"
         + "tet:te/"
         + "tet:interface-switching-capability/tet:max-lsp-bandwidth/"
         + "tet:te-bandwidth/tet:technology" {
     when "../../../../../../nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE bandwidth";
     }
     description "OTN bandwidth.";
     case otn {
       uses l1-types:otn-path-bandwidth;
     }
   }
   /* Augment bandwidth path constraints of connectivity-matrices */
   augment "/nw:networks/nw:network/nw:node/tet:te/"
         + "tet:te-node-attributes/tet:connectivity-matrices/"
         + "tet:path-constraints/tet:te-bandwidth/tet:technology" {
     when "../../../../../../nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE bandwidth";
     }
     description "OTN bandwidth.";
     case otn {
       uses l1-types:otn-link-bandwidth;
     }
   }

   /* Augment bandwidth path constraints of connectivity-matrix */
   augment "/nw:networks/nw:network/nw:node/tet:te/"
         + "tet:te-node-attributes/tet:connectivity-matrices/"
         + "tet:connectivity-matrix/"
         + "tet:path-constraints/tet:te-bandwidth/tet:technology" {
     when "../../../../../../../nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {



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       description "Augment OTN TE bandwidth";
     }
     description "OTN bandwidth.";
     case otn {
       uses l1-types:otn-link-bandwidth;
     }
   }

   /* Augment bandwidth path constraints of
    * connectivity-matrices information-source */
   augment "/nw:networks/nw:network/nw:node/tet:te/"
         + "tet:information-source-entry/tet:connectivity-matrices/"
         + "tet:path-constraints/tet:te-bandwidth/tet:technology" {
     when "../../../../../../nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE bandwidth";
     }
     description "OTN bandwidth.";
     case otn {
       uses l1-types:otn-link-bandwidth;
     }
   }

   /* Augment bandwidth path constraints of
    * connectivity-matrix information-source */
   augment "/nw:networks/nw:network/nw:node/tet:te/"
         + "tet:information-source-entry/tet:connectivity-matrices/"
         + "tet:connectivity-matrix/"
         + "tet:path-constraints/tet:te-bandwidth/tet:technology" {
     when "../../../../../../../nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE bandwidth";
     }
     description "OTN bandwidth.";
     case otn {
       uses l1-types:otn-link-bandwidth;
     }
   }

   /* Augment client bandwidth of tunnel termination point (TTP) */
   augment "/nw:networks/nw:network/nw:node/tet:te/"
         + "tet:tunnel-termination-point/"
         + "tet:client-layer-adaptation/tet:switching-capability/"
         + "tet:te-bandwidth/tet:technology" {
     when "../../../../../../nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE bandwidth";
     }



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     description "OTN bandwidth.";
     case otn {
       uses l1-types:otn-link-bandwidth;
     }
   }

   /* Augment bandwidth path constraints of
    * local-link-connectivities */
   augment "/nw:networks/nw:network/nw:node/tet:te/"
         + "tet:tunnel-termination-point/"
         + "tet:local-link-connectivities/tet:path-constraints/"
         + "tet:te-bandwidth/tet:technology" {
     when "../../../../../../nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE bandwidth";
     }
     description "OTN bandwidth.";
     case otn {
       uses l1-types:otn-link-bandwidth;
     }
   }

   /* Augment bandwidth path constraints of
    * local-link-connectivity (LLC) */
   augment "/nw:networks/nw:network/nw:node/tet:te/"
         + "tet:tunnel-termination-point/"
         + "tet:local-link-connectivities/"
         + "tet:local-link-connectivity/tet:path-constraints/"
         + "tet:te-bandwidth/tet:technology" {
     when "../../../../../../../nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE bandwidth";
     }
     description "OTN bandwidth.";
     case otn {
       uses l1-types:otn-link-bandwidth;
     }
   }

   /* Augment maximum LSP bandwidth of TE link */
   augment "/nw:networks/nw:network/nt:link/tet:te/"
         + "tet:te-link-attributes/"
         + "tet:interface-switching-capability/tet:max-lsp-bandwidth/"
         + "tet:te-bandwidth/tet:technology" {
     when "../../../../../../nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "OTN TE bandwidth.";
     }



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     description "OTN bandwidth.";
     case otn {
       uses l1-types:otn-path-bandwidth;
     }
   }

   /* Augment maximum bandwidth of TE link */
   augment "/nw:networks/nw:network/nt:link/tet:te/"
         + "tet:te-link-attributes/"
         + "tet:max-link-bandwidth/"
         + "tet:te-bandwidth/tet:technology" {
     when "../../../../../nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "OTN TE bandwidth.";
     }
     description "OTN bandwidth.";
     case otn {
       uses l1-types:otn-link-bandwidth;
     }
   }

   /* Augment maximum reservable bandwidth of TE link */
   augment "/nw:networks/nw:network/nt:link/tet:te/"
         + "tet:te-link-attributes/"
         + "tet:max-resv-link-bandwidth/"
         + "tet:te-bandwidth/tet:technology" {
     when "../../../../../nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "OTN TE bandwidth.";
     }
     description "OTN bandwidth.";
     case otn {
       uses l1-types:otn-link-bandwidth;
     }
   }

   /* Augment unreserved bandwidth of TE Link */
   augment "/nw:networks/nw:network/nt:link/tet:te/"
         + "tet:te-link-attributes/"
         + "tet:unreserved-bandwidth/"
         + "tet:te-bandwidth/tet:technology" {
     when "../../../../../nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "OTN TE bandwidth.";
     }
     description "OTN bandwidth.";
     case otn {
       uses l1-types:otn-link-bandwidth;



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     }
   }
   /* Augment maximum LSP bandwidth of TE link information-source */
   augment "/nw:networks/nw:network/nt:link/tet:te/"
         + "tet:information-source-entry/"
         + "tet:interface-switching-capability/"
         + "tet:max-lsp-bandwidth/"
         + "tet:te-bandwidth/tet:technology" {
     when "../../../../../../nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "OTN TE bandwidth.";
     }
     description "OTN bandwidth.";
     case otn {
       uses l1-types:otn-path-bandwidth;
     }
   }

   /* Augment maximum bandwidth of TE link information-source */
   augment "/nw:networks/nw:network/nt:link/tet:te/"
         + "tet:information-source-entry/"
         + "tet:max-link-bandwidth/"
         + "tet:te-bandwidth/tet:technology" {
     when "../../../../../nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "OTN TE bandwidth.";
     }
     description "OTN bandwidth.";
     case otn {
       uses l1-types:otn-link-bandwidth;
     }
   }

   /* Augment max reservable bandwidth of TE link information-source */
   augment "/nw:networks/nw:network/nt:link/tet:te/"
         + "tet:information-source-entry/"
         + "tet:max-resv-link-bandwidth/"
         + "tet:te-bandwidth/tet:technology" {
     when "../../../../../nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "OTN TE bandwidth.";
     }
     description "OTN bandwidth.";
     case otn {
       uses l1-types:otn-link-bandwidth;
     }
   }




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   /* Augment unreserved bandwidth of TE link information-source */
   augment "/nw:networks/nw:network/nt:link/tet:te/"
         + "tet:information-source-entry/"
         + "tet:unreserved-bandwidth/"
         + "tet:te-bandwidth/tet:technology" {
     when "../../../../../nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "OTN TE bandwidth.";
     }
     description "OTN bandwidth.";
     case otn {
       uses l1-types:otn-link-bandwidth;
     }
   }

   /* Augment maximum LSP bandwidth of TE link template */
   augment "/nw:networks/tet:te/tet:templates/"
         + "tet:link-template/tet:te-link-attributes/"
         + "tet:interface-switching-capability/"
         + "tet:max-lsp-bandwidth/"
         + "tet:te-bandwidth/tet:technology" {
 /*
     when "../../../../../../nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "OTN TE bandwidth.";
     }
 */
     description "OTN bandwidth.";
     case otn {
       uses l1-types:otn-path-bandwidth;
     }
   }

   /* Augment maximum bandwidth of TE link template */
   augment "/nw:networks/tet:te/tet:templates/"
         + "tet:link-template/tet:te-link-attributes/"
         + "tet:max-link-bandwidth/"
         + "tet:te-bandwidth/tet:technology" {
 /*
     when "../../../../../nw:network-types/tet:te-topology/"
         + "otntopo:otn-topology" {
       description "OTN TE bandwidth.";
     }
 */
     description "OTN bandwidth.";
     case otn {
       uses l1-types:otn-link-bandwidth;
     }



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   }

   /* Augment maximum reservable bandwidth of TE link template */
   augment "/nw:networks/tet:te/tet:templates/"
         + "tet:link-template/tet:te-link-attributes/"
         + "tet:max-resv-link-bandwidth/"
         + "tet:te-bandwidth/tet:technology" {
 /*
     when "../../../../../nw:network-types/tet:te-topology/"
         + "otntopo:otn-topology" {
       description "OTN TE bandwidth.";
     }
 */
     description "OTN bandwidth.";
     case otn {
       uses l1-types:otn-link-bandwidth;
     }
   }

   /* Augment unreserved bandwidth of TE link template */
   augment "/nw:networks/tet:te/tet:templates/"
         + "tet:link-template/tet:te-link-attributes/"
         + "tet:unreserved-bandwidth/"
         + "tet:te-bandwidth/tet:technology" {
 /*
     when "../../../../../../nw:network-types/tet:te-topology/"
         + "otntopo:otn-topology" {
       description "OTN TE bandwidth.";
     }
 */
     description "OTN bandwidth.";
     case otn {
       uses l1-types:otn-link-bandwidth;
     }
   }

   /*
    * Augment TE label.
    */

   /* Augment label restrictions of connectivity-matrices */
   augment "/nw:networks/nw:network/nw:node/tet:te/"
         + "tet:te-node-attributes/tet:connectivity-matrices/"
         + "tet:label-restrictions/tet:label-restriction" {
     when "../../../../../../nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }



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     description
       "OTN label restriction, represented by otn-label-range-info.";
     uses l1-types:otn-label-range-info;
   }

   /* Augment label restrictions start of connectivity-matrices */
   augment "/nw:networks/nw:network/nw:node/tet:te/"
         + "tet:te-node-attributes/tet:connectivity-matrices/"
         + "tet:label-restrictions/tet:label-restriction/"
         + "tet:label-start/tet:te-label/tet:technology" {
     when "../../../../../../../../nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
     description "OTN label.";
     case otn {
       uses l1-types:otn-label-start-end;
     }
   }

   /* Augment label restrictions end of connectivity-matrices */
   augment "/nw:networks/nw:network/nw:node/tet:te/"
         + "tet:te-node-attributes/tet:connectivity-matrices/"
         + "tet:label-restrictions/tet:label-restriction/"
         + "tet:label-end/tet:te-label/tet:technology" {
     when "../../../../../../../../nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
     description "OTN label.";
     case otn {
       uses l1-types:otn-label-start-end;
     }
   }

   /* Augment label restrictions step of connectivity-matrices */
   augment "/nw:networks/nw:network/nw:node/tet:te/"
         + "tet:te-node-attributes/tet:connectivity-matrices/"
         + "tet:label-restrictions/tet:label-restriction/"
         + "tet:label-step/tet:technology" {
     when "../../../../../../../nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
     description "OTN label.";
     case otn {
       uses l1-types:otn-label-step;
     }



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   }

   /* Augment label hop of underlay primary path
    * of connectivity-matrices */
   augment "/nw:networks/nw:network/nw:node/tet:te/"
         + "tet:te-node-attributes/tet:connectivity-matrices/"
         + "tet:underlay/tet:primary-path/tet:path-element/"
         + "tet:type/tet:label/tet:label-hop/"
         + "tet:te-label/tet:technology" {
     when "../../../../../../../../../"
        + "nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
     description "OTN label.";
     case otn {
       uses l1-types:otn-label-hop;
     }
   }
   /* Augment label hop of underlay backup path
    * of connectivity-matrices */
   augment "/nw:networks/nw:network/nw:node/tet:te/"
         + "tet:te-node-attributes/tet:connectivity-matrices/"
         + "tet:underlay/tet:backup-path/tet:path-element/"
         + "tet:type/tet:label/tet:label-hop/"
         + "tet:te-label/tet:technology" {
     when "../../../../../../../../../"
        + "nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
     description "OTN label.";
     case otn {
       uses l1-types:otn-label-hop;
     }
   }

   /* Augment label hop of route-exclude of connectivity-matrices */
   augment "/nw:networks/nw:network/nw:node/tet:te/"
         + "tet:te-node-attributes/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/"



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        + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
     description "OTN label.";
     case otn {
       uses l1-types:otn-label-hop;
     }
   }

   /* Augment label hop of route-include of connectivity-matrices */
   augment "/nw:networks/nw:network/nw:node/tet:te/"
         + "tet:te-node-attributes/tet:connectivity-matrices/"
         + "tet:optimizations/tet:algorithm/tet:metric/"
         + "tet:optimization-metric/"
         + "tet:explicit-route-include-objects/"
         + "tet:route-object-include-object/"
         + "tet:type/tet:label/tet:label-hop/"
         + "tet:te-label/tet:technology" {
     when "../../../../../../../../../../"
        + "nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
     description "OTN label.";
     case otn {
       uses l1-types:otn-label-hop;
     }
   }

   /* Augment label hop of path-route of connectivity-matrices */
   augment "/nw:networks/nw:network/nw:node/tet:te/"
         + "tet:te-node-attributes/tet:connectivity-matrices/"
         + "tet:path-properties/tet:path-route-objects/"
         + "tet:path-route-object/tet:type/tet:label/tet:label-hop/"
         + "tet:te-label/tet:technology"{
     when "../../../../../../../../../"
        + "nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
     description "OTN label.";
     case otn {
       uses l1-types:otn-label-hop;
     }
   }

   /* Augment ingress label restrictions of connectivity-matrix */
   augment "/nw:networks/nw:network/nw:node/tet:te/"



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         + "tet:te-node-attributes/tet:connectivity-matrices/"
         + "tet:connectivity-matrix/tet:from/"
         + "tet:label-restrictions/tet:label-restriction" {
     when "../../../../../../../../nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
     description "OTN label.";
     uses l1-types:otn-label-range-info;
   }

   /* Augment ingress label restrictions start of
    * connectivity-matrix */
   augment "/nw:networks/nw:network/nw:node/tet:te/"
         + "tet:te-node-attributes/tet:connectivity-matrices/"
         + "tet:connectivity-matrix/tet:from/"
         + "tet:label-restrictions/tet:label-restriction/"
         + "tet:label-start/tet:te-label/tet:technology" {
     when "../../../../../../../../../../"
        + "nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
     description "OTN label.";
     case otn {
       uses l1-types:otn-label-start-end;
     }
   }

   /* Augment ingress label restrictions end of connectivity-matrix */
   augment "/nw:networks/nw:network/nw:node/tet:te/"
         + "tet:te-node-attributes/tet:connectivity-matrices/"
         + "tet:connectivity-matrix/tet:from/"
         + "tet:label-restrictions/tet:label-restriction/tet:label-end/"
         + "tet:te-label/tet:technology" {
     when "../../../../../../../../../../"
        + "nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
     description "OTN label.";
     case otn {
       uses l1-types:otn-label-start-end;
     }
   }

   /* Augment ingress label restrictions step of connectivity-matrix */
   augment "/nw:networks/nw:network/nw:node/tet:te/"



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         + "tet:te-node-attributes/tet:connectivity-matrices/"
         + "tet:connectivity-matrix/tet:from/"
         + "tet:label-restrictions/tet:label-restriction/"
         + "tet:label-step/tet:technology" {
     when "../../../../../../../../../"
        + "nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
     description "OTN label.";
     case otn {
       uses l1-types:otn-label-step;
     }
   }

   /* Augment egress label restrictions of connectivity-matrix */
   augment "/nw:networks/nw:network/nw:node/tet:te/"
         + "tet:te-node-attributes/tet:connectivity-matrices/"
         + "tet:connectivity-matrix/tet:to/"
         + "tet:label-restrictions/tet:label-restriction" {
     when "../../../../../../../../nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
     description "OTN label.";
     uses l1-types:otn-label-range-info;
   }

   /* Augment egress label restrictions start of connectivity-matrix */
   augment "/nw:networks/nw:network/nw:node/tet:te/"
         + "tet:te-node-attributes/tet:connectivity-matrices/"
         + "tet:connectivity-matrix/tet:to/"
         + "tet:label-restrictions/tet:label-restriction/"
         + "tet:label-start/tet:te-label/tet:technology" {
     when "../../../../../../../../../../"
        + "nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
     description "OTN label.";
     case otn {
       uses l1-types:otn-label-start-end;
     }
   }

   /* Augment egress label restrictions end of connectivity-matrix */
   augment "/nw:networks/nw:network/nw:node/tet:te/"
         + "tet:te-node-attributes/tet:connectivity-matrices/"



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         + "tet:connectivity-matrix/tet:to/"
         + "tet:label-restrictions/tet:label-restriction/"
         + "tet:label-end/tet:te-label/tet:technology" {
     when "../../../../../../../../../../"
        + "nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
     description "OTN label.";
     case otn {
       uses l1-types:otn-label-start-end;
     }
   }

   /* Augment egress label restrictions step of connectivity-matrix */
   augment "/nw:networks/nw:network/nw:node/tet:te/"
         + "tet:te-node-attributes/tet:connectivity-matrices/"
         + "tet:connectivity-matrix/tet:to/"
         + "tet:label-restrictions/tet:label-restriction/"
         + "tet:label-step/tet:technology" {
     when "../../../../../../../../../"
        + "nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
     description "OTN label.";
     case otn {
       uses l1-types:otn-label-step;
     }
   }

   /* Augment label hop of underlay primary path of
    * connectivity-matrix */
   augment "/nw:networks/nw:network/nw:node/tet:te/"
         + "tet:te-node-attributes/tet:connectivity-matrices/"
         + "tet:connectivity-matrix/"
         + "tet:underlay/tet:primary-path/tet:path-element/"
         + "tet:type/tet:label/tet:label-hop/"
         + "tet:te-label/tet:technology" {
     when "../../../../../../../../../../"
        + "nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
     description "OTN label.";
     case otn {
       uses l1-types:otn-label-hop;
     }



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   }

   /* Augment label hop of underlay backup path of
    * connectivity-matrix */
   augment "/nw:networks/nw:network/nw:node/tet:te/"
         + "tet:te-node-attributes/tet:connectivity-matrices/"
         + "tet:connectivity-matrix/"
         + "tet:underlay/tet:backup-path/tet:path-element/"
         + "tet:type/tet:label/tet:label-hop/"
         + "tet:te-label/tet:technology" {
     when "../../../../../../../../../../"
        + "nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
     description "OTN label.";
     case otn {
       uses l1-types:otn-label-hop;
     }
   }

   /* Augment label hop of route-exclude of connectivity-matrix */
   augment "/nw:networks/nw:network/nw:node/tet:te/"
         + "tet:te-node-attributes/tet:connectivity-matrices/"
         + "tet:connectivity-matrix/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" {
       description "Augment OTN TE label";
     }
     description "OTN label.";
     case otn {
       uses l1-types:otn-label-hop;
     }
   }

   /* Augment label hop of route-include of connectivity-matrix */
   augment "/nw:networks/nw:network/nw:node/tet:te/"
         + "tet:te-node-attributes/tet:connectivity-matrices/"
         + "tet:connectivity-matrix/tet:optimizations/"
         + "tet:algorithm/tet:metric/tet:optimization-metric/"
         + "tet:explicit-route-include-objects/"
         + "tet:route-object-include-object/tet:type/"
         + "tet:label/tet:label-hop/tet:te-label/tet:technology" {



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     when "../../../../../../../../../../../"
        + "nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
     description "OTN label.";
     case otn {
       uses l1-types:otn-label-hop;
     }
   }

   /* Augment label hop of path-route of connectivity-matrix */
   augment "/nw:networks/nw:network/nw:node/tet:te/"
         + "tet:te-node-attributes/tet:connectivity-matrices/"
         + "tet:connectivity-matrix/"
         + "tet:path-properties/tet:path-route-objects/"
         + "tet:path-route-object/tet:type/"
         + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
     when "../../../../../../../../../../"
        + "nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
     description "OTN label.";
     case otn {
       uses l1-types:otn-label-hop;
     }
   }

   /* Augment label range information of
    * connectivity-matrices information-source */
   augment "/nw:networks/nw:network/nw:node/tet:te/"
         + "tet:information-source-entry/"
         + "tet:connectivity-matrices/tet:label-restrictions/"
         + "tet:label-restriction" {
     when "../../../../../../nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
     description "OTN label.";
     uses l1-types:otn-label-range-info;
   }

   /* Augment label restrictions start of
    * connectivity-matrices information-source */
   augment "/nw:networks/nw:network/nw:node/tet:te/"
         + "tet:information-source-entry/"
         + "tet:connectivity-matrices/tet:label-restrictions/"



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         + "tet:label-restriction/"
         + "tet:label-start/tet:te-label/tet:technology" {
     when "../../../../../../../../"
        + "nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
     description "OTN label.";
     case otn {
       uses l1-types:otn-label-start-end;
     }
   }

   /* Augment label restrictions end of
    * connectivity-matrices information-source */
   augment "/nw:networks/nw:network/nw:node/tet:te/"
         + "tet:information-source-entry/"
         + "tet:connectivity-matrices/tet:label-restrictions/"
         + "tet:label-restriction/"
         + "tet:label-end/tet:te-label/tet:technology" {
     when "../../../../../../../../"
        + "nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
     description "OTN label.";
     case otn {
       uses l1-types:otn-label-start-end;
     }
   }

   /* Augment label restrictions step of
    * connectivity-matrices information-source */
   augment "/nw:networks/nw:network/nw:node/tet:te/"
         + "tet:information-source-entry/"
         + "tet:connectivity-matrices/tet:label-restrictions/"
         + "tet:label-restriction/"
         + "tet:label-step/tet:technology" {
     when "../../../../../../../"
        + "nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
     description "OTN label.";
     case otn {
       uses l1-types:otn-label-step;
     }
   }



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   /* Augment label hop of underlay primary path of
    * connectivity-matrices information-source */
   augment "/nw:networks/nw:network/nw:node/tet:te/"
         + "tet:information-source-entry/tet:connectivity-matrices/"
         + "tet:underlay/tet:primary-path/tet:path-element/tet:type/"
         + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
     when "../../../../../../../../../"
        + "nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
     description "OTN label.";
     case otn {
       uses l1-types:otn-label-hop;
     }
   }

   /* Augment label hop of underlay backup path of
    * connectivity-matrices information-source */
   augment "/nw:networks/nw:network/nw:node/tet:te/"
         + "tet:information-source-entry/tet:connectivity-matrices/"
         + "tet:underlay/tet:backup-path/tet:path-element/tet:type/"
         + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
     when "../../../../../../../../../"
        + "nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
     description "OTN label.";
     case otn {
       uses l1-types:otn-label-hop;
     }
   }

   /* Augment label hop of route-exclude of
    * connectivity-matrices information-source */
   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" {
       description "Augment OTN TE label";
     }



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     description "OTN label.";
     case otn {
       uses l1-types:otn-label-hop;
     }
   }

   /* Augment label hop of route-include of
    * connectivity-matrices information-source */
   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-include-objects/"
         + "tet:route-object-include-object/tet:type/"
         + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
     when "../../../../../../../../../../"
        + "nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
     description "OTN label.";
     case otn {
       uses l1-types:otn-label-hop;
     }
   }

   /* Augment label hop of path-route of
    * connectivity-matrices information-source */
   augment "/nw:networks/nw:network/nw:node/tet:te/"
         + "tet:information-source-entry/tet:connectivity-matrices/"
         + "tet:path-properties/tet:path-route-objects/"
         + "tet:path-route-object/tet:type/"
         + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
     when "../../../../../../../../../"
        + "nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
     description "OTN label.";
     case otn {
       uses l1-types:otn-label-hop;
     }
   }

   /* Augment ingress label restrictions of
    * connectivity-matrix information-source */
   augment "/nw:networks/nw:network/nw:node/tet:te/"
         + "tet:information-source-entry/tet:connectivity-matrices/"



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         + "tet:connectivity-matrix/"
         + "tet:from/tet:label-restrictions/tet:label-restriction" {
     when "../../../../../../../../nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
     description "OTN label.";
     uses l1-types:otn-label-range-info;
   }

   /* Augment ingress label restrictions start of
    * connectivity-matrix information-source */
   augment "/nw:networks/nw:network/nw:node/tet:te/"
         + "tet:information-source-entry/tet:connectivity-matrices/"
         + "tet:connectivity-matrix/"
         + "tet:from/tet:label-restrictions/tet:label-restriction/"
         + "tet:label-start/tet:te-label/tet:technology" {
     when "../../../../../../../../../../"
        + "nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
     description "OTN label.";
     case otn {
       uses l1-types:otn-label-start-end;
     }
   }

   /* Augment ingress label restrictions end of
    * connectivity-matrix information-source */
   augment "/nw:networks/nw:network/nw:node/tet:te/"
         + "tet:information-source-entry/tet:connectivity-matrices/"
         + "tet:connectivity-matrix/"
         + "tet:from/tet:label-restrictions/tet:label-restriction/"
         + "tet:label-end/tet:te-label/tet:technology" {
     when "../../../../../../../../../../"
        + "nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
     description "OTN label.";
     case otn {
       uses l1-types:otn-label-start-end;
     }
   }

   /* Augment ingress label restrictions step of
    * connectivity-matrix information-source */



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   augment "/nw:networks/nw:network/nw:node/tet:te/"
         + "tet:information-source-entry/tet:connectivity-matrices/"
         + "tet:connectivity-matrix/"
         + "tet:from/tet:label-restrictions/tet:label-restriction/"
         + "tet:label-step/tet:technology" {
     when "../../../../../../../../../"
        + "nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
     description "OTN label.";
     case otn {
       uses l1-types:otn-label-step;
     }
   }

   /* Augment egress label restrictions of
    * connectivity-matrix information-source */
   augment "/nw:networks/nw:network/nw:node/tet:te/"
         + "tet:information-source-entry/tet:connectivity-matrices/"
         + "tet:connectivity-matrix/"
         + "tet:to/tet:label-restrictions/tet:label-restriction" {
     when "../../../../../../../../nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
     description "OTN label.";
     uses l1-types:otn-label-range-info;
   }

   /* Augment egress label restrictions start of
    * connectivity-matrix information-source */
   augment "/nw:networks/nw:network/nw:node/tet:te/"
         + "tet:information-source-entry/tet:connectivity-matrices/"
         + "tet:connectivity-matrix/"
         + "tet:to/tet:label-restrictions/tet:label-restriction/"
         + "tet:label-start/tet:te-label/tet:technology" {
     when "../../../../../../../../../../"
        + "nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
     description "OTN label.";
     case otn {
       uses l1-types:otn-label-start-end;
     }
   }




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   /* Augment egress label restrictions end of
    * connectivity-matrix information-source */
   augment "/nw:networks/nw:network/nw:node/tet:te/"
         + "tet:information-source-entry/tet:connectivity-matrices/"
         + "tet:connectivity-matrix/"
         + "tet:to/tet:label-restrictions/tet:label-restriction/"
         + "tet:label-end/tet:te-label/tet:technology" {
     when "../../../../../../../../../../"
        + "nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
     description "OTN label.";
     case otn {
       uses l1-types:otn-label-start-end;
     }
   }

   /* Augment egress label restrictions step of
    * connectivity-matrix information-source */
   augment "/nw:networks/nw:network/nw:node/tet:te/"
         + "tet:information-source-entry/tet:connectivity-matrices/"
         + "tet:connectivity-matrix/"
         + "tet:to/tet:label-restrictions/tet:label-restriction/"
         + "tet:label-step/tet:technology" {
     when "../../../../../../../../../"
        + "nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
     description "OTN label.";
     case otn {
       uses l1-types:otn-label-step;
     }
   }

   /* Augment label hop of underlay primary path of
    * connectivity-matrix information-source */
   augment "/nw:networks/nw:network/nw:node/tet:te/"
         + "tet:information-source-entry/tet:connectivity-matrices/"
         + "tet:connectivity-matrix/"
         + "tet:underlay/tet:primary-path/tet:path-element/tet:type/"
         + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
     when "../../../../../../../../../../"
        + "nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }



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     description "OTN label.";
     case otn {
       uses l1-types:otn-label-hop;
     }
   }

   /* Augment label hop of underlay backup path of
    * connectivity-matrix information-source */
   augment "/nw:networks/nw:network/nw:node/tet:te/"
         + "tet:information-source-entry/tet:connectivity-matrices/"
         + "tet:connectivity-matrix/"
         + "tet:underlay/tet:backup-path/tet:path-element/tet:type/"
         + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
     when "../../../../../../../../../../"
        + "nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
     description "OTN label.";
     case otn {
       uses l1-types:otn-label-hop;
     }
   }

   /* Augment label hop of route-exclude of
    * connectivity-matrix information-source */
   augment "/nw:networks/nw:network/nw:node/tet:te/"
         + "tet:information-source-entry/tet:connectivity-matrices/"
         + "tet:connectivity-matrix/"
         + "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" {
       description "Augment OTN TE label";
     }
     description "OTN label.";
     case otn {
       uses l1-types:otn-label-hop;
     }
   }

   /* Augment label hop of route-include of
    * connectivity-matrix information-source */
   augment "/nw:networks/nw:network/nw:node/tet:te/"



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         + "tet:information-source-entry/tet:connectivity-matrices/"
         + "tet:connectivity-matrix/"
         + "tet:optimizations/tet:algorithm/tet:metric/"
         + "tet:optimization-metric/"
         + "tet:explicit-route-include-objects/"
         + "tet:route-object-include-object/tet:type/"
         + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
     when "../../../../../../../../../../../"
        + "nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
     description "OTN label.";
     case otn {
       uses l1-types:otn-label-hop;
     }
   }

   /* Augment label hop of path-route of
    * connectivity-matrix information-source */
   augment "/nw:networks/nw:network/nw:node/tet:te/"
         + "tet:information-source-entry/tet:connectivity-matrices/"
         + "tet:connectivity-matrix/"
         + "tet:path-properties/tet:path-route-objects/"
         + "tet:path-route-object/tet:type/"
         + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
     when "../../../../../../../../../../"
        + "nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
     description "OTN label.";
     case otn {
       uses l1-types:otn-label-hop;
     }
   }
   /* Augment label restrictions of local-link-connectivities */
   augment "/nw:networks/nw:network/nw:node/tet:te/"
         + "tet:tunnel-termination-point/"
         + "tet:local-link-connectivities/"
         + "tet:label-restrictions/tet:label-restriction" {
     when "../../../../../../nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
     description "OTN label.";
     uses l1-types:otn-label-range-info;
   }



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   /* Augment label restrictions start of local-link-connectivities */
   augment "/nw:networks/nw:network/nw:node/tet:te/"
         + "tet:tunnel-termination-point/"
         + "tet:local-link-connectivities/"
         + "tet:label-restrictions/tet:label-restriction/"
         + "tet:label-start/tet:te-label/tet:technology" {
     when "../../../../../../../../nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
     description "OTN label.";
     case otn {
       uses l1-types:otn-label-start-end;
     }
   }

   /* Augment label restrictions end of local-link-connectivities */
   augment "/nw:networks/nw:network/nw:node/tet:te/"
         + "tet:tunnel-termination-point/"
         + "tet:local-link-connectivities/"
         + "tet:label-restrictions/tet:label-restriction/"
         + "tet:label-end/tet:te-label/tet:technology"{
     when "../../../../../../../../nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
     description "OTN label.";
     case otn {
       uses l1-types:otn-label-start-end;
     }
   }

   /* Augment label restrictions step of local-link-connectivities */
   augment "/nw:networks/nw:network/nw:node/tet:te/"
         + "tet:tunnel-termination-point/"
         + "tet:local-link-connectivities/"
         + "tet:label-restrictions/tet:label-restriction/"
         + "tet:label-step/tet:technology"{
     when "../../../../../../../nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
     description "OTN label.";
     case otn {
       uses l1-types:otn-label-step;
     }
   }




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   /* Augment label hop of underlay primary path
    * of local-link-connectivities */
   augment "/nw:networks/nw:network/nw:node/tet:te/"
         + "tet:tunnel-termination-point/"
         + "tet:local-link-connectivities/"
         + "tet:underlay/tet:primary-path/tet:path-element/tet:type/"
         + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
     when "../../../../../../../../../"
        + "nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
     description "OTN label.";
     case otn {
       uses l1-types:otn-label-hop;
     }
   }

   /* Augment label hop of underlay backup path
    * of local-link-connectivities */
   augment "/nw:networks/nw:network/nw:node/tet:te/"
         + "tet:tunnel-termination-point/"
         + "tet:local-link-connectivities/"
         + "tet:underlay/tet:backup-path/tet:path-element/tet:type/"
         + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
     when "../../../../../../../../../"
        + "nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
     description "OTN label.";
     case otn {
       uses l1-types:otn-label-hop;
     }
   }

   /* Augment label hop of route-exclude of
    * local-link-connectivities */
   augment "/nw:networks/nw:network/nw:node/tet:te/"
         + "tet:tunnel-termination-point/"
         + "tet:local-link-connectivities/"
         + "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/"



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        + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
     description "OTN label.";
     case otn {
       uses l1-types:otn-label-hop;
     }
   }

   /* Augment label hop of route-include of
    * local-link-connectivities */
   augment "/nw:networks/nw:network/nw:node/tet:te/"
         + "tet:tunnel-termination-point/"
         + "tet:local-link-connectivities/"
         + "tet:optimizations/tet:algorithm/tet:metric/"
         + "tet:optimization-metric/"
         + "tet:explicit-route-include-objects/"
         + "tet:route-object-include-object/tet:type/"
         + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
     when "../../../../../../../../../../"
        + "nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
     description "OTN label.";
     case otn {
       uses l1-types:otn-label-hop;
     }
   }

   /* Augment label hop of path-route of local-link-connectivities */
   augment "/nw:networks/nw:network/nw:node/tet:te/"
         + "tet:tunnel-termination-point/"
         + "tet:local-link-connectivities/"
         + "tet:path-properties/tet:path-route-objects/"
         + "tet:path-route-object/tet:type/"
         + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
     when "../../../../../../../../../"
        + "nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
     description "OTN label.";
     case otn {
       uses l1-types:otn-label-hop;
     }
   }




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   /* Augment label restrictions of local-link-connectivity (LLC) */
   augment "/nw:networks/nw:network/nw:node/tet:te/"
         + "tet:tunnel-termination-point/"
         + "tet:local-link-connectivities/"
         + "tet:local-link-connectivity/"
         + "tet:label-restrictions/tet:label-restriction" {
     when "../../../../../../../nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
     description "OTN label.";
     uses l1-types:otn-label-range-info;
   }

   /* Augment label start of local-link-connectivity (LLC) */
   augment "/nw:networks/nw:network/nw:node/tet:te/"
         + "tet:tunnel-termination-point/"
         + "tet:local-link-connectivities/"
         + "tet:local-link-connectivity/"
         + "tet:label-restrictions/tet:label-restriction/"
         + "tet:label-start/tet:te-label/tet:technology" {
     when "../../../../../../../../../"
        + "nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
     description "OTN label.";
     case otn {
       uses l1-types:otn-label-start-end;
     }
   }

   /* Augment label end of local-link-connectivity (LLC) */
   augment "/nw:networks/nw:network/nw:node/tet:te/"
         + "tet:tunnel-termination-point/"
         + "tet:local-link-connectivities/"
         + "tet:local-link-connectivity/"
         + "tet:label-restrictions/tet:label-restriction/"
         + "tet:label-end/tet:te-label/tet:technology" {
     when "../../../../../../../../../"
        + "nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
     description "OTN label.";
     case otn {
       uses l1-types:otn-label-start-end;
     }



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   }

   /* Augment label step of local-link-connectivity (LLC) */
   augment "/nw:networks/nw:network/nw:node/tet:te/"
         + "tet:tunnel-termination-point/"
         + "tet:local-link-connectivities/"
         + "tet:local-link-connectivity/"
         + "tet:label-restrictions/tet:label-restriction/"
         + "tet:label-step/tet:technology" {
     when "../../../../../../../../"
        + "nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
     description "OTN label.";
     case otn {
       uses l1-types:otn-label-step;
     }
   }

   /* Augment label hop of underlay primary path
    * of local-link-connectivity (LLC) */
   augment "/nw:networks/nw:network/nw:node/tet:te/"
         + "tet:tunnel-termination-point/"
         + "tet:local-link-connectivities/"
         + "tet:local-link-connectivity/"
         + "tet:underlay/tet:primary-path/tet:path-element/tet:type/"
         + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
     when "../../../../../../../../../../"
        + "nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
     description "OTN label.";
     case otn {
       uses l1-types:otn-label-hop;
     }
   }

   /* Augment label hop of underlay backup path of
    * local-link-connectivity (LLC) */
   augment "/nw:networks/nw:network/nw:node/tet:te/"
         + "tet:tunnel-termination-point/"
         + "tet:local-link-connectivities/"
         + "tet:local-link-connectivity/"
         + "tet:underlay/tet:backup-path/tet:path-element/tet:type/"
         + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
     when "../../../../../../../../../../"



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        + "nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
     description "OTN label.";
     case otn {
       uses l1-types:otn-label-hop;
     }
   }

   /* Augment label hop of route-exclude of
    * local-link-connectivity (LLC) */
   augment "/nw:networks/nw:network/nw:node/tet:te/"
         + "tet:tunnel-termination-point/"
         + "tet:local-link-connectivities/"
         + "tet:local-link-connectivity/"
         + "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" {
       description "Augment OTN TE label";
     }
     description "OTN label.";
     case otn {
       uses l1-types:otn-label-hop;
     }
   }

   /* Augment label hop of route-include of
    * local-link-connectivity (LLC) */
   augment "/nw:networks/nw:network/nw:node/tet:te/"
         + "tet:tunnel-termination-point/"
         + "tet:local-link-connectivities/"
         + "tet:local-link-connectivity/"
         + "tet:optimizations/tet:algorithm/tet:metric/"
         + "tet:optimization-metric/"
         + "tet:explicit-route-include-objects/"
         + "tet:route-object-include-object/tet:type/"
         + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
     when "../../../../../../../../../../../"
        + "nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }



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     description "OTN label.";
     case otn {
       uses l1-types:otn-label-hop;
     }
   }

   /* Augment label hop of path-route of
    * local-link-connectivity (LLC) */
   augment "/nw:networks/nw:network/nw:node/tet:te/"
         + "tet:tunnel-termination-point/"
         + "tet:local-link-connectivities/"
         + "tet:local-link-connectivity/"
         + "tet:path-properties/tet:path-route-objects/"
         + "tet:path-route-object/tet:type/"
         + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
     when "../../../../../../../../../../"
        + "nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
     description "OTN label.";
     case otn {
       uses l1-types:otn-label-hop;
     }
   }

   /* Augment label hop of underlay primary path of TE link */
   augment "/nw:networks/nw:network/nt:link/tet:te/"
         + "tet:te-link-attributes/"
         + "tet:underlay/tet:primary-path/tet:path-element/tet:type/"
         + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
     when "../../../../../../../../"
        + "nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
     description "OTN label.";
     case otn {
       uses l1-types:otn-label-hop;
     }
   }

   /* Augment label hop of underlay backup path of TE link */
   augment "/nw:networks/nw:network/nt:link/tet:te/"
         + "tet:te-link-attributes/"
         + "tet:underlay/tet:backup-path/tet:path-element/tet:type/"
         + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
     when "../../../../../../../../"



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        + "nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
     description "OTN label.";
     case otn {
       uses l1-types:otn-label-hop;
     }
   }

   /* Augment label restrictions of TE link */
   augment "/nw:networks/nw:network/nt:link/tet:te/"
         + "tet:te-link-attributes/"
         + "tet:label-restrictions/tet:label-restriction" {
     when "../../../../../nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
     description "OTN label.";
     uses l1-types:otn-label-range-info;
   }

   /* Augment label restrictions start of TE link */
   augment "/nw:networks/nw:network/nt:link/tet:te/"
         + "tet:te-link-attributes/"
         + "tet:label-restrictions/tet:label-restriction/"
         + "tet:label-start/tet:te-label/tet:technology" {
     when "../../../../../../../nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
     description "OTN label.";
     case otn {
       uses l1-types:otn-label-start-end;
     }
   }

   /* Augment label restrictions end of TE link */
   augment "/nw:networks/nw:network/nt:link/tet:te/"
         + "tet:te-link-attributes/"
         + "tet:label-restrictions/tet:label-restriction/"
         + "tet:label-end/tet:te-label/tet:technology" {
     when "../../../../../../../nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
     description "OTN label.";
     case otn {



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       uses l1-types:otn-label-start-end;
     }
   }

   /* Augment label restrictions step of TE link */
   augment "/nw:networks/nw:network/nt:link/tet:te/"
         + "tet:te-link-attributes/"
         + "tet:label-restrictions/tet:label-restriction/"
         + "tet:label-step/tet:technology" {
     when "../../../../../../nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
     description "OTN label.";
     case otn {
       uses l1-types:otn-label-step;
     }
   }

   /* Augment label restrictions of TE link information-source */
   augment "/nw:networks/nw:network/nt:link/tet:te/"
         + "tet:information-source-entry/"
         + "tet:label-restrictions/tet:label-restriction" {
     when "../../../../../nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
     description "OTN label.";
     uses l1-types:otn-label-range-info;
   }

   /* Augment label restrictions start of TE link information-source */
   augment "/nw:networks/nw:network/nt:link/tet:te/"
         + "tet:information-source-entry/"
         + "tet:label-restrictions/tet:label-restriction/"
         + "tet:label-start/tet:te-label/tet:technology" {
     when "../../../../../../../nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
     description "OTN label.";
     case otn {
       uses l1-types:otn-label-start-end;
     }
   }
   /* Augment label restrictions end of TE link information-source */
   augment "/nw:networks/nw:network/nt:link/tet:te/"
         + "tet:information-source-entry/"



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         + "tet:label-restrictions/tet:label-restriction/"
         + "tet:label-end/tet:te-label/tet:technology" {
     when "../../../../../../../nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
     description "OTN label.";
     case otn {
       uses l1-types:otn-label-start-end;
     }
   }

   /* Augment label restrictions step of TE link information-source */
   augment "/nw:networks/nw:network/nt:link/tet:te/"
         + "tet:information-source-entry/"
         + "tet:label-restrictions/tet:label-restriction/"
         + "tet:label-step/tet:technology" {
     when "../../../../../../nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
     description "OTN label.";
     case otn {
       uses l1-types:otn-label-step;
     }
   }

   /* Augment label hop of underlay primary path of TE link template */
   augment "/nw:networks/tet:te/tet:templates/"
         + "tet:link-template/tet:te-link-attributes/"
         + "tet:underlay/tet:primary-path/tet:path-element/tet:type/"
         + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
 /*
     when "../../../../../../../../../../"
        + "nw:network-types/tet:te-topology/"
        + "otntopo:otn-topology" {
                          description "Augment OTN TE label";
     }
 */
     description "OTN label.";
     case otn {
       uses l1-types:otn-label-hop;
     }
   }

   /* Augment label hop of underlay backup path of TE link template */
   augment "/nw:networks/tet:te/tet:templates/"
         + "tet:link-template/tet:te-link-attributes/"



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         + "tet:underlay/tet:backup-path/tet:path-element/tet:type/"
         + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
 /*
     when "../../../../../../../../../../nw:network-types/"
         + "tet:te-topology/otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
 */
     description "OTN label.";
     case otn {
       uses l1-types:otn-label-hop;
     }
   }

   /* Augment label restrictions of TE link template */
   augment "/nw:networks/tet:te/tet:templates/"
         + "tet:link-template/tet:te-link-attributes/"
         + "tet:label-restrictions/tet:label-restriction" {
 /*
     when "../../../../../nw:network-types/tet:te-topology/"
         + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
 */
     description "OTN label.";
     uses l1-types:otn-label-range-info;
   }

   /* Augment label restrictions start of TE link template */
   augment "/nw:networks/tet:te/tet:templates/"
         + "tet:link-template/tet:te-link-attributes/"
         + "tet:label-restrictions/tet:label-restriction/"
         + "tet:label-start/tet:te-label/tet:technology" {
 /*
     when "../../../../../../../nw:network-types/tet:te-topology/"
         + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
 */
     description "OTN label.";
     case otn {
       uses l1-types:otn-label-start-end;
     }
   }

   /* Augment label restrictions end of TE link template */
   augment "/nw:networks/tet:te/tet:templates/"
         + "tet:link-template/tet:te-link-attributes/"



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         + "tet:label-restrictions/tet:label-restriction/"
         + "tet:label-end/tet:te-label/tet:technology" {
 /*
     when "../../../../../../../nw:network-types/tet:te-topology/"
         + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
 */
     description "OTN label.";
     case otn {
       uses l1-types:otn-label-start-end;
     }
   }

   /* Augment label restrictions step of TE link template */
   augment "/nw:networks/tet:te/tet:templates/"
         + "tet:link-template/tet:te-link-attributes/"
         + "tet:label-restrictions/tet:label-restriction/"
         + "tet:label-step/tet:technology" {
 /*
     when "../../../../../../nw:network-types/tet:te-topology/"
         + "otntopo:otn-topology" {
       description "Augment OTN TE label";
     }
 */
     description "OTN label.";
     case otn {
       uses l1-types:otn-label-step;
     }
   }
 }
 <CODE ENDS>


5.  IANA Considerations

   It is proposed that IANA should assign new URIs from the "IETF XML
   Registry" [RFC3688] as follows:


         URI: urn:ietf:params:xml:ns:yang:ietf-otn-topology
         Registrant Contact: The IESG
         XML: N/A; the requested URI is an XML namespace.


   This document registers a YANG module in the YANG Module Names
   registry [RFC7950].




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      name:         ietf-otn-topology
      namespace:    urn:ietf:params:xml:ns:yang:ietf-otn-topology
      prefix:       otntopo
      reference:    RFC XXXX


6.  Security Considerations

   The YANG module specified in this document defines a schema for data
   that is designed to be accessed via network management protocols such
   as NETCONF [RFC6241] or RESTCONF [RFC8040].  The lowest NETCONF layer
   is the secure transport layer, and the mandatory-to-implement secure
   transport is Secure Shell (SSH) [RFC6242].  The lowest RESTCONF layer
   is HTTPS, and the mandatory-to-implement secure transport is TLS
   [RFC8446].

   The NETCONF access control model [RFC8341] provides the means to
   restrict access for particular NETCONF or RESTCONF users to a
   preconfigured subset of all available NETCONF or RESTCONF protocol
   operations and content.

   There are a number of data nodes defined in this YANG module that are
   writable/creatable/deletable (i.e., config true, which is the
   default).  These data nodes may be considered sensitive or vulnerable
   in some network environments.  Write operations (e.g., edit-config)
   to these data nodes without proper protection can have a negative
   effect on network operations.  These are the subtrees and data nodes
   and their sensitivity/vulnerability:

   /nw:networks/nw:network/nw:network-types/tet:te-topology
   /nw:networks/nw:network/nt:link/tet:te/tet:te-link-attributes
   /nw:networks/nw:network/nw:node/nt:termination-point/tet:te
   /nw:networks/nw:network/.../tet:te-bandwidth/tet:technology
   /nw:networks/nw:network/nw:node/tet:te/.../tet:label-restriction
   /nw:networks/nw:network/nw:node/.../tet:te-label/tet:technology
   Editors note: we are using simplified description by folding similar
   branches to avoid repetation.

   Some of the readable data nodes in this YANG module may be considered
   sensitive or vulnerable in some network environments.  It is thus
   important to control read access (e.g., via get, get-config, or
   notification) to these data nodes.  These are the subtrees and data
   nodes and their sensitivity/vulnerability:

   Editors note: Currently there is no such data nodes, temporarily kept
   for review.





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7.  Acknowledgements

   We would like to thank Igor Bryskin, Zhe Liu, Zheyu Fan and Daniele
   Ceccarelli for their comments and discussions.

8.  Contributors

   Aihua Guo
   Individual
   Email: aihuaguo.ietf@gmail.com

   Anurag Sharma
   Google
   Email: ansha@google.com

   Yunbin Xu
   CAICT
   Email: xuyunbin@caict.ac.cn

   Lei Wang
   China Mobile
   Email: wangleiyj@chinamobile.com

   Baoquan Rao
   Huawei Technologies
   Email: raobaoquan@huawei.com

   Xian Zhang
   Huawei Technologies
   Email: zhang.xian@huawei.com

   Huub van Helvoort
   Hai Gaoming BV
   the Netherlands
   Email: huubatwork@gmail.com

   Victor Lopez
   Telefonica
   Email: victor.lopezalvarez@telefonica.com

   Yunbo Li
   China Mobile
   Email: liyunbo@chinamobile.com

   Dieter Beller
   Nokia
   Email: dieter.beller@nokia.com




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   Yanlei Zheng
   China Unicom
   Email: zhengyanlei@chinaunicom.cn

9.  References

9.1.  Normative References

   [I-D.ietf-ccamp-layer1-types]
              Zheng, H. and I. Busi, "A YANG Data Model for Layer 1
              Types", draft-ietf-ccamp-layer1-types-04 (work in
              progress), December 2019.

   [I-D.ietf-ccamp-otn-tunnel-model]
              Zheng, H., Busi, I., Belotti, S., Lopezalvarez, V., and Y.
              Xu, "OTN Tunnel YANG Model", draft-ietf-ccamp-otn-tunnel-
              model-09 (work in progress), November 2019.

   [I-D.ietf-teas-yang-te-topo]
              Liu, X., Bryskin, I., Beeram, V., Saad, T., Shah, H., and
              O. Dios, "YANG Data Model for Traffic Engineering (TE)
              Topologies", draft-ietf-teas-yang-te-topo-22 (work in
              progress), June 2019.

   [ITU-Tg709]
              ITU-, T., "SERIES G: TRANSMISSION SYSTEMS AND MEDIA,
              DIGITAL SYSTEMS AND NETWORKS; Digital networks; Interfaces
              for the optical transport network", ITU-T Rec. G.709 ,
              March 2020.

   [RFC2119]  Bradner, S., "Key words for use in RFCs to Indicate
              Requirement Levels", BCP 14, RFC 2119,
              DOI 10.17487/RFC2119, March 1997,
              <https://www.rfc-editor.org/info/rfc2119>.

   [RFC3688]  Mealling, M., "The IETF XML Registry", BCP 81, RFC 3688,
              DOI 10.17487/RFC3688, January 2004,
              <https://www.rfc-editor.org/info/rfc3688>.

   [RFC6241]  Enns, R., Ed., Bjorklund, M., Ed., Schoenwaelder, J., Ed.,
              and A. Bierman, Ed., "Network Configuration Protocol
              (NETCONF)", RFC 6241, DOI 10.17487/RFC6241, June 2011,
              <https://www.rfc-editor.org/info/rfc6241>.

   [RFC6242]  Wasserman, M., "Using the NETCONF Protocol over Secure
              Shell (SSH)", RFC 6242, DOI 10.17487/RFC6242, June 2011,
              <https://www.rfc-editor.org/info/rfc6242>.




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   [RFC7138]  Ceccarelli, D., Ed., Zhang, F., Belotti, S., Rao, R., and
              J. Drake, "Traffic Engineering Extensions to OSPF for
              GMPLS Control of Evolving G.709 Optical Transport
              Networks", RFC 7138, DOI 10.17487/RFC7138, March 2014,
              <https://www.rfc-editor.org/info/rfc7138>.

   [RFC7139]  Zhang, F., Ed., Zhang, G., Belotti, S., Ceccarelli, D.,
              and K. Pithewan, "GMPLS Signaling Extensions for Control
              of Evolving G.709 Optical Transport Networks", RFC 7139,
              DOI 10.17487/RFC7139, March 2014,
              <https://www.rfc-editor.org/info/rfc7139>.

   [RFC7950]  Bjorklund, M., Ed., "The YANG 1.1 Data Modeling Language",
              RFC 7950, DOI 10.17487/RFC7950, August 2016,
              <https://www.rfc-editor.org/info/rfc7950>.

   [RFC8040]  Bierman, A., Bjorklund, M., and K. Watsen, "RESTCONF
              Protocol", RFC 8040, DOI 10.17487/RFC8040, January 2017,
              <https://www.rfc-editor.org/info/rfc8040>.

   [RFC8174]  Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC
              2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174,
              May 2017, <https://www.rfc-editor.org/info/rfc8174>.

   [RFC8341]  Bierman, A. and M. Bjorklund, "Network Configuration
              Access Control Model", STD 91, RFC 8341,
              DOI 10.17487/RFC8341, March 2018,
              <https://www.rfc-editor.org/info/rfc8341>.

   [RFC8342]  Bjorklund, M., Schoenwaelder, J., Shafer, P., Watsen, K.,
              and R. Wilton, "Network Management Datastore Architecture
              (NMDA)", RFC 8342, DOI 10.17487/RFC8342, March 2018,
              <https://www.rfc-editor.org/info/rfc8342>.

   [RFC8345]  Clemm, A., Medved, J., Varga, R., Bahadur, N.,
              Ananthakrishnan, H., and X. Liu, "A YANG Data Model for
              Network Topologies", RFC 8345, DOI 10.17487/RFC8345, March
              2018, <https://www.rfc-editor.org/info/rfc8345>.

   [RFC8446]  Rescorla, E., "The Transport Layer Security (TLS) Protocol
              Version 1.3", RFC 8446, DOI 10.17487/RFC8446, August 2018,
              <https://www.rfc-editor.org/info/rfc8446>.

9.2.  Informative References







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   [I-D.ietf-ccamp-flexigrid-yang]
              Madrid, U., Perdices, D., Lopezalvarez, V., King, D., Lee,
              Y., and H. Zheng, "YANG data model for Flexi-Grid Optical
              Networks", draft-ietf-ccamp-flexigrid-yang-05 (work in
              progress), January 2020.

   [I-D.ietf-ccamp-transport-nbi-app-statement]
              Busi, I., King, D., Zheng, H., and Y. Xu, "Transport
              Northbound Interface Applicability Statement", draft-ietf-
              ccamp-transport-nbi-app-statement-10 (work in progress),
              November 2019.

   [I-D.ietf-ccamp-wson-yang]
              Zheng, H., Lee, Y., Guo, A., Lopezalvarez, V., and D.
              King, "A YANG Data Model for WSON (Wavelength Switched
              Optical Networks)", draft-ietf-ccamp-wson-yang-23 (work in
              progress), November 2019.

   [I-D.ietf-teas-actn-yang]
              Lee, Y., Zheng, H., Ceccarelli, D., Yoon, B., Dios, O.,
              Shin, J., and S. Belotti, "Applicability of YANG models
              for Abstraction and Control of Traffic Engineered
              Networks", draft-ietf-teas-actn-yang-05 (work in
              progress), February 2020.

   [RFC7062]  Zhang, F., Ed., Li, D., Li, H., Belotti, S., and D.
              Ceccarelli, "Framework for GMPLS and PCE Control of G.709
              Optical Transport Networks", RFC 7062,
              DOI 10.17487/RFC7062, November 2013,
              <https://www.rfc-editor.org/info/rfc7062>.

   [RFC8340]  Bjorklund, M. and L. Berger, Ed., "YANG Tree Diagrams",
              BCP 215, RFC 8340, DOI 10.17487/RFC8340, March 2018,
              <https://www.rfc-editor.org/info/rfc8340>.

   [RFC8453]  Ceccarelli, D., Ed. and Y. Lee, Ed., "Framework for
              Abstraction and Control of TE Networks (ACTN)", RFC 8453,
              DOI 10.17487/RFC8453, August 2018,
              <https://www.rfc-editor.org/info/rfc8453>.

Authors' Addresses










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   Haomian Zheng
   Huawei Technologies
   H1, Huawei Industrial Base, Songshan Lake
   Dongguan, Guangdong  523808
   China

   Email: zhenghaomian@huawei.com


   Italo Busi
   Huawei Technologies
   HUAWEI TECHNOLOGIES ITALIA Srl Centro Direzionale Milano 2
   Milan, Milan  20090
   Italy

   Email: Italo.Busi@huawei.com


   Xufeng Liu
   Volta Networks

   Email: xufeng.liu.ietf@gmail.com


   Sergio Belotti
   Nokia

   Email: sergio.belotti@nokia.com


   Oscar Gonzalez de Dios
   Telefonica

   Email: oscar.gonzalezdedios@telefonica.com

















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