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A YANG Data Model for Flexi-Grid Optical Networks
draft-ietf-ccamp-flexigrid-yang-16

Document Type Active Internet-Draft (ccamp WG)
Authors Universidad Autonoma de Madrid , Daniel Perdices Burrero , Daniel King , Young Lee , Haomian Zheng
Last updated 2024-01-29
Replaces draft-vergara-ccamp-flexigrid-yang
RFC stream Internet Engineering Task Force (IETF)
Intended RFC status Proposed Standard
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Additional resources Github repository for ietf-flexi-grid yang
Yang catalog entry for ietf-flexi-grid-topology@2020-10-21.yang
Yang impact analysis for draft-ietf-ccamp-flexigrid-yang
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Document shepherd Adrian Farrel
Shepherd write-up Show Last changed 2022-07-21
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draft-ietf-ccamp-flexigrid-yang-16
CCAMP Working Group                               J. E. Lopez de Vergara
Internet-Draft                                               Naudit HPCN
Intended status: Standards Track                     D. Perdices Burrero
Expires: 1 August 2024                    Universidad Autonoma de Madrid
                                                                 D. King
                                                      Old Dog Consulting
                                                                  Y. Lee
                                                                 Samsung
                                                                H. Zheng
                                                     Huawei Technologies
                                                         29 January 2024

           A YANG Data Model for Flexi-Grid Optical Networks
                   draft-ietf-ccamp-flexigrid-yang-16

Abstract

   This document defines a YANG module for managing flexi-grid optical
   networks.  The model defined in this document specifies a flexi-grid
   traffic engineering database that is used to describe the topology of
   a flexi-grid network.  It is based on and augments existing YANG
   models that describe network and traffic engineering topologies.

About This Document

   This note is to be removed before publishing as an RFC.

   The latest revision of this draft can be found at https://ietf-ccamp-
   wg.github.io/draft-ietf-ccamp-flexigrid-yang/draft-ietf-ccamp-
   flexigrid-yang.html.  Status information for this document may be
   found at https://datatracker.ietf.org/doc/draft-ietf-ccamp-flexigrid-
   yang/.

   Discussion of this document takes place on the Common Control and
   Measurement Plane Working Group mailing list (mailto:ccamp@ietf.org),
   which is archived at https://mailarchive.ietf.org/arch/browse/ccamp/.
   Subscribe at https://www.ietf.org/mailman/listinfo/ccamp/.

   Source for this draft and an issue tracker can be found at
   https://github.com/ietf-ccamp-wg/draft-ietf-ccamp-flexigrid-yang.

Status of This Memo

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

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   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/.

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   This Internet-Draft will expire on 1 August 2024.

Copyright Notice

   Copyright (c) 2024 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 Revised BSD License text as
   described in Section 4.e of the Trust Legal Provisions and are
   provided without warranty as described in the Revised BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Tree Diagram  . . . . . . . . . . . . . . . . . . . . . . . .   4
     3.1.  Prefixes in Data Node Names . . . . . . . . . . . . . . .   4
   4.  Example of Use  . . . . . . . . . . . . . . . . . . . . . . .   5
   5.  YANG Data Model for Flexi-Grid Topology . . . . . . . . . . .   6
     5.1.  Flexi-Grid Topology Data Model Overview . . . . . . . . .   6
     5.2.  Augmentations for Flexi-Grid Topology and Node  . . . . .   7
     5.3.  Bandwidth Augmentation  . . . . . . . . . . . . . . . . .   7
     5.4.  Label Augmentation  . . . . . . . . . . . . . . . . . . .   8
   6.  YANG Model (Tree Structure) for Flexi-Grid Topology . . . . .   8
   7.  The YANG Code for Flexi-grid topology . . . . . . . . . . . .  29
   8.  Security Considerations . . . . . . . . . . . . . . . . . . .  64
   9.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  65
   10. References  . . . . . . . . . . . . . . . . . . . . . . . . .  65
     10.1.  Normative References . . . . . . . . . . . . . . . . . .  65
     10.2.  Informative References . . . . . . . . . . . . . . . . .  67
   Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . .  68
   Contributors  . . . . . . . . . . . . . . . . . . . . . . . . . .  68
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  69

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1.  Introduction

   The flexible grid (flexi-grid) optical network technology defined by
   the International Telecommunication Union Telecommunication
   Standardization Sector (ITU-T) and documented in Recommendation ITU-
   T_G.694.1 [ITU-T_G.694.1] and ITU-T_G.872 [ITU-T_G.872] provides an
   enhanced Dense Wavelength Division Multiplexing (DWDM) grid by
   defining a set of nominal central frequencies, slot widths, and the
   concept of the "frequency slot".  This technology increases both
   transport network scalability and flexibility, allowing the
   optimization of bandwidth usage.

   [RFC7698] provides a framework for GMPLS-Based control of flexi-grid
   DWDM networks while [RFC7699] defines generalized labels for the use
   of GMPLS in flexi-grid networks.

   [RFC8363] provides extensions to the OSPF-TE protocol so as to
   support GMPLS control of flexi-grid networks.

   This document presents a YANG data model [RFC7950] for flexi-grid
   objects in the dynamic optical network, including nodes, transponders
   and links, as well as how such links interconnect nodes.  This model
   is independent of control plane protocols.

   This document identifies the flexi-grid components, parameters, and
   their values.  It characterizes the features and the performances of
   the flexi-grid elements.  For this, it augments [RFC8795], and
   imports the generic Layer 0 types and use of "media-channel" defined
   in [I-D.ietf-ccamp-rfc9093-bis].

   An application example in Section 4 is also provided to better
   understand the utility of this YANG model.

   A partner document defines a second YANG module that described flexi-
   grid tunnels, i.e., the paths from source to destination through a
   number of intermediate nodes [I-D.ietf-ccamp-flexigrid-tunnel-yang].

   Impairment-aware traffic engineering topology is described in
   [I-D.ietf-ccamp-optical-impairment-topology-yang].

   The YANG data model defined in this document conforms to the Network
   Management Datastore Architecture (NMDA) [RFC8342].

2.  Terminology

   Refer to [RFC7698] and [RFC7699] for the key terms used in this
   document.

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   The following terms are defined in [RFC7950] and are not redefined
   here:

   *  client

   *  server

   *  augment

   *  data model

   *  data node

   The following terms are defined in [RFC6241] and are not redefined
   here:

   *  configuration data

   *  state data

   The terminology for describing YANG data models is found in
   [RFC7950].

3.  Tree Diagram

   A simplified graphical representation of the data model is used in
   this document.  The meaning of the symbols in these diagrams is
   defined in [RFC8340].

3.1.  Prefixes in Data Node Names

   In this document, names of data nodes and other data model objects
   are prefixed using the standard prefix associated with the
   corresponding YANG imported modules, as shown in Table 1.  It uses
   prefixes from [I-D.ietf-ccamp-rfc9093-bis], [RFC8345], and [RFC8795].

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            +==========+==========================+===========+
            | Prefix   | YANG module              | Reference |
            +==========+==========================+===========+
            | l0-types | ietf-layer0-types        | [RFCYYYY] |
            +----------+--------------------------+-----------+
            | flexgt   | ietf-flexi-grid-topology | RFC XXXX  |
            +----------+--------------------------+-----------+
            | nw       | ietf-network             | [RFC8345] |
            +----------+--------------------------+-----------+
            | nt       | ietf-network-topology    | [RFC8345] |
            +----------+--------------------------+-----------+
            | tet      | ietf-te-topology         | [RFC8795] |
            +----------+--------------------------+-----------+

              Table 1: Prefixes and corresponding YANG modules

   RFC Editor Note: Please replace XXXX with the RFC number assigned to
   this document.  Please replace YYYY with the RFC numbers assigned to
   [I-D.ietf-ccamp-rfc9093-bis].  Please remove this note.

4.  Example of Use

   In order to explain how this model is used, we provide the following
   example.  An optical network usually has multiple transponders,
   switches (nodes) and links.  Figure 1 shows a simple topology.

        +----------+                                        +----------+
        |  Flexi-  |                                        | Flexi-   |
        |   grid   |                                        |  grid    |
        |  node A  |                                        | node E   |
        |          |        +------+        +------+        |          |
        |          | Link 1 |Flexi-| Link 2 |Flexi-| Link 3 |          |
        |          |<------>| grid |<------>| grid |<------>|          |
        |......... |        |node B|        |node C|        | .........|
        | Trans- : |        +------+        +------+        | : Trans- |
        | ponder : |                                        | : ponder |
        |    A   : |              +----------+              | :    E   |
        |........: |     Link 4   |Flexi-grid|   Link 5     | :........|
        |          |<------------>|   node   |<------------>|          |
        |          |              |    D     |              |          |
        |          |              +----------+              |          |
        +----------+                                        +----------+

                        Figure 1: Topology Example

   In order to configure a flexi-grid network to interconnect
   transponders A and E, first of all we have to populate the flexi-grid
   topology YANG model with all elements in the network:

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   *  We define the transponders within nodes A and E as tunnel
      termination points (TTPs) and provide their internal local link
      connectivity towards the node interfaces.  We also provide the
      identifiers, addresses and interfaces of nodes A and B.

   *  We do the same for the nodes B, C and D, providing their
      identifiers, addresses and interfaces, as well as the internal
      connectivity matrix between interfaces.

   *  Then, we also define the links 1 to 5 that interconnect nodes,
      indicating which flexi-grid labels are available.

   *  Other information, such as the slot frequency and granularity are
      also provided.

5.  YANG Data Model for Flexi-Grid Topology

5.1.  Flexi-Grid Topology Data Model Overview

   This document describes the data model for flexi-grid topology.  As a
   classic traffic engineering (TE) technology, flexi-grid provides WDM
   switching in transport network.  Therefore the YANG module presented
   in this document augments from a more generic TE network topology
   data model, i.e., the ietf-te-topology, as specified in [RFC8795],
   following the guidelines provided in section 6 of [RFC8795].

   Common types, identities, and groupings defined in
   [I-D.ietf-ccamp-rfc9093-bis] are reused in this document.

   The figure below shows the augmentation relationship between YANG
   models.

                           +-------------------------+
              TE generic   |    ietf-te-topology     |
                           +-------------------------+
                                        ^
                                        |
                                        | Augments
                                        |
                           +------------+-------------+
              Flexi-Grid   | ietf-flexi-grid-topology |
                           +--------------------------+

      Figure 2: Relationship between Flexi-Grid and TE topology models

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   The entities and TE attributes, such as node, termination points and
   links, are still applicable for describing a flexi-grid topology and
   the model presented in this document only specifies the technology-
   specific attributes/information.

   The flexi-grid specific attributes and label format is defined in
   [RFC7699], including the grid type, nominal central frequency
   granularity, slot width granularity, n and m parameters.  A
   collection of common data types have also been specified in
   [I-D.ietf-ccamp-rfc9093-bis], and used in this document for
   augmentation of the generic TE topology model.

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

5.2.  Augmentations for Flexi-Grid Topology and Node

   There are a few characteristics augmenting to the generic TE
   topology.

   Following the guidelines in [RFC8795], a flexi-grid-topology network-
   type is specified as the indicator of flexi-grid in the topology as
   shown in Figure 3.

       augment /nw:networks/nw:network/nw:network-types/tet:te-topology:
         +--rw flexi-grid-topology!

              Figure 3: Flexi-Grid Topology Augmentation

   A flexi-grid-node presence container is specified, augmenting the
   generic TE node attributes, to indicate that the TE node is a Flexi-
   Grid node as shown in Figure 4.

             augment /nw:networks/nw:network/nw:node/tet:te
                     /tet:te-node-attributes:
               +--rw flexi-grid-node!

                   Figure 4: Flex-Grid Node Augmentation

   It is assumed that all the flexi-grid nodes are reconfigurable.

5.3.  Bandwidth Augmentation

   No bandwidth augmentations are needed for this YANG module.

   As described in Section 4.2 of [RFC7699], there is some overlap
   between bandwidth and label in Layer 0.

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   The flexi-grid label resource information described in Section 5.4,
   is sufficient to also describe the spectrum resources within a flexi-
   grid network.  Therefore, the model does not define any augmentation
   for the te-bandwidth containers defined in [RFC8795].

5.4.  Label Augmentation

   The model augments all the occurrences of the label-restriction list
   in [RFC8795] with flexi-grid technology specific attributes using the
   flexi-grid-label-range-info grouping defined in
   [I-D.ietf-ccamp-rfc9093-bis].

   Moreover, following the guidelines in [RFC8795], the model augments
   all the occurrences of the te-label container with the flexi-grid
   technology specific attributes using the flexi-grid-label-start-end,
   flexi-grid-label-hop and flexi-grid-label-step groupings defined in
   [I-D.ietf-ccamp-rfc9093-bis].

6.  YANG Model (Tree Structure) for Flexi-Grid Topology

   module: ietf-flexi-grid-topology

     augment /nw:networks/nw:network/nw:network-types/tet:te-topology:
       +--rw flexi-grid-topology!
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:te-node-attributes:
       +--rw flexi-grid-node!
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:te-node-attributes/tet:connectivity-matrices
               /tet:label-restrictions/tet:label-restriction:
       +--rw flexi-grid-label-range!
          +--rw grid-type?    identityref
          +--rw priority?     uint8
          +--rw flexi-grid
             +--rw slot-width-granularity?   identityref
             +--rw min-slot-width-factor?    uint16
             +--rw max-slot-width-factor?    uint16
     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 flexi-grid-label-range!
          +--rw grid-type?    identityref
          +--rw priority?     uint8
          +--rw flexi-grid
             +--rw slot-width-granularity?   identityref
             +--rw min-slot-width-factor?    uint16
             +--rw max-slot-width-factor?    uint16

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     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 flexi-grid-label-range!
          +--rw grid-type?    identityref
          +--rw priority?     uint8
          +--rw flexi-grid
             +--rw slot-width-granularity?   identityref
             +--rw min-slot-width-factor?    uint16
             +--rw max-slot-width-factor?    uint16
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:information-source-entry/tet:connectivity-matrices
               /tet:label-restrictions/tet:label-restriction:
       +--ro flexi-grid-label-range!
          +--ro grid-type?    identityref
          +--ro priority?     uint8
          +--ro flexi-grid
             +--ro slot-width-granularity?   identityref
             +--ro min-slot-width-factor?    uint16
             +--ro max-slot-width-factor?    uint16
     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 flexi-grid-label-range!
          +--ro grid-type?    identityref
          +--ro priority?     uint8
          +--ro flexi-grid
             +--ro slot-width-granularity?   identityref
             +--ro min-slot-width-factor?    uint16
             +--ro max-slot-width-factor?    uint16
     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 flexi-grid-label-range!
          +--ro grid-type?    identityref
          +--ro priority?     uint8
          +--ro flexi-grid
             +--ro slot-width-granularity?   identityref
             +--ro min-slot-width-factor?    uint16
             +--ro max-slot-width-factor?    uint16
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:tunnel-termination-point
               /tet:local-link-connectivities/tet:label-restrictions
               /tet:label-restriction:
       +--rw flexi-grid-label-range!

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          +--rw grid-type?    identityref
          +--rw priority?     uint8
          +--rw flexi-grid
             +--rw slot-width-granularity?   identityref
             +--rw min-slot-width-factor?    uint16
             +--rw max-slot-width-factor?    uint16
     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 flexi-grid-label-range!
          +--rw grid-type?    identityref
          +--rw priority?     uint8
          +--rw flexi-grid
             +--rw slot-width-granularity?   identityref
             +--rw min-slot-width-factor?    uint16
             +--rw max-slot-width-factor?    uint16
     augment /nw:networks/nw:network/nt:link/tet:te
               /tet:te-link-attributes/tet:label-restrictions
               /tet:label-restriction:
       +--rw flexi-grid-label-range!
          +--rw grid-type?    identityref
          +--rw priority?     uint8
          +--rw flexi-grid
             +--rw slot-width-granularity?   identityref
             +--rw min-slot-width-factor?    uint16
             +--rw max-slot-width-factor?    uint16
     augment /nw:networks/nw:network/nt:link/tet:te
               /tet:information-source-entry/tet:label-restrictions
               /tet:label-restriction:
       +--ro flexi-grid-label-range!
          +--ro grid-type?    identityref
          +--ro priority?     uint8
          +--ro flexi-grid
             +--ro slot-width-granularity?   identityref
             +--ro min-slot-width-factor?    uint16
             +--ro max-slot-width-factor?    uint16
     augment /nw:networks/tet:te/tet:templates/tet:link-template
               /tet:te-link-attributes/tet:label-restrictions
               /tet:label-restriction:
       +--rw flexi-grid-label-range!
          +--rw grid-type?    identityref
          +--rw priority?     uint8
          +--rw flexi-grid
             +--rw slot-width-granularity?   identityref
             +--rw min-slot-width-factor?    uint16
             +--rw max-slot-width-factor?    uint16

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     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:
       +--:(flexi-grid)
          +--rw flexi-n?   l0-types:flexi-n
     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:
       +--:(flexi-grid)
          +--rw flexi-n?   l0-types:flexi-n
     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:
       +--:(flexi-grid)
          x--rw flexi-grid-channel-spacing?   identityref
          +--rw flexi-ncfg?                   identityref
          +--rw flexi-n-step?                 uint8
     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:
       +--:(flexi-grid)
          +--rw (single-or-super-channel)?
             +--:(single)
             |  +--rw flexi-n?              l0-types:flexi-n
             |  +--rw flexi-m?              l0-types:flexi-m
             x--:(super)
             |  +--rw subcarrier-flexi-n* [flexi-n]
             |     +--rw flexi-n    l0-types:flexi-n
             |     +--rw flexi-m?   l0-types:flexi-m
             +--:(multi)
                +--rw frequency-slots
                   +--rw frequency-slot* [flexi-n]
                      +--rw flexi-n    l0-types:flexi-n
                      +--rw flexi-m?   l0-types:flexi-m
     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:
       +--:(flexi-grid)
          +--rw (single-or-super-channel)?
             +--:(single)
             |  +--rw flexi-n?              l0-types:flexi-n
             |  +--rw flexi-m?              l0-types:flexi-m
             x--:(super)

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             |  +--rw subcarrier-flexi-n* [flexi-n]
             |     +--rw flexi-n    l0-types:flexi-n
             |     +--rw flexi-m?   l0-types:flexi-m
             +--:(multi)
                +--rw frequency-slots
                   +--rw frequency-slot* [flexi-n]
                      +--rw flexi-n    l0-types:flexi-n
                      +--rw flexi-m?   l0-types:flexi-m
     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:
       +--:(flexi-grid)
          +--rw (single-or-super-channel)?
             +--:(single)
             |  +--rw flexi-n?              l0-types:flexi-n
             |  +--rw flexi-m?              l0-types:flexi-m
             x--:(super)
             |  +--rw subcarrier-flexi-n* [flexi-n]
             |     +--rw flexi-n    l0-types:flexi-n
             |     +--rw flexi-m?   l0-types:flexi-m
             +--:(multi)
                +--rw frequency-slots
                   +--rw frequency-slot* [flexi-n]
                      +--rw flexi-n    l0-types:flexi-n
                      +--rw flexi-m?   l0-types:flexi-m
     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:
       +--:(flexi-grid)
          +--rw (single-or-super-channel)?
             +--:(single)
             |  +--rw flexi-n?              l0-types:flexi-n
             |  +--rw flexi-m?              l0-types:flexi-m
             x--:(super)
             |  +--rw subcarrier-flexi-n* [flexi-n]
             |     +--rw flexi-n    l0-types:flexi-n
             |     +--rw flexi-m?   l0-types:flexi-m
             +--:(multi)
                +--rw frequency-slots
                   +--rw frequency-slot* [flexi-n]

Lopez de Vergara, et al.  Expires 1 August 2024                [Page 12]
Internet-Draft               Flexi-Grid YANG                January 2024

                      +--rw flexi-n    l0-types:flexi-n
                      +--rw flexi-m?   l0-types:flexi-m
     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:
       +--:(flexi-grid)
          +--ro (single-or-super-channel)?
             +--:(single)
             |  +--ro flexi-n?              l0-types:flexi-n
             |  +--ro flexi-m?              l0-types:flexi-m
             x--:(super)
             |  +--ro subcarrier-flexi-n* [flexi-n]
             |     +--ro flexi-n    l0-types:flexi-n
             |     +--ro flexi-m?   l0-types:flexi-m
             +--:(multi)
                +--ro frequency-slots
                   +--ro frequency-slot* [flexi-n]
                      +--ro flexi-n    l0-types:flexi-n
                      +--ro flexi-m?   l0-types:flexi-m
     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:
       +--:(flexi-grid)
          +--rw flexi-n?   l0-types:flexi-n
     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:
       +--:(flexi-grid)
          +--rw flexi-n?   l0-types:flexi-n
     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:
       +--:(flexi-grid)
          x--rw flexi-grid-channel-spacing?   identityref
          +--rw flexi-ncfg?                   identityref
          +--rw flexi-n-step?                 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:

Lopez de Vergara, et al.  Expires 1 August 2024                [Page 13]
Internet-Draft               Flexi-Grid YANG                January 2024

       +--:(flexi-grid)
          +--rw flexi-n?   l0-types:flexi-n
     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:
       +--:(flexi-grid)
          +--rw flexi-n?   l0-types:flexi-n
     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:
       +--:(flexi-grid)
          x--rw flexi-grid-channel-spacing?   identityref
          +--rw flexi-ncfg?                   identityref
          +--rw flexi-n-step?                 uint8
     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:
       +--:(flexi-grid)
          +--rw (single-or-super-channel)?
             +--:(single)
             |  +--rw flexi-n?              l0-types:flexi-n
             |  +--rw flexi-m?              l0-types:flexi-m
             x--:(super)
             |  +--rw subcarrier-flexi-n* [flexi-n]
             |     +--rw flexi-n    l0-types:flexi-n
             |     +--rw flexi-m?   l0-types:flexi-m
             +--:(multi)
                +--rw frequency-slots
                   +--rw frequency-slot* [flexi-n]
                      +--rw flexi-n    l0-types:flexi-n
                      +--rw flexi-m?   l0-types:flexi-m
     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:
       +--:(flexi-grid)
          +--rw (single-or-super-channel)?
             +--:(single)
             |  +--rw flexi-n?              l0-types:flexi-n
             |  +--rw flexi-m?              l0-types:flexi-m
             x--:(super)
             |  +--rw subcarrier-flexi-n* [flexi-n]

Lopez de Vergara, et al.  Expires 1 August 2024                [Page 14]
Internet-Draft               Flexi-Grid YANG                January 2024

             |     +--rw flexi-n    l0-types:flexi-n
             |     +--rw flexi-m?   l0-types:flexi-m
             +--:(multi)
                +--rw frequency-slots
                   +--rw frequency-slot* [flexi-n]
                      +--rw flexi-n    l0-types:flexi-n
                      +--rw flexi-m?   l0-types:flexi-m
     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:
       +--:(flexi-grid)
          +--rw (single-or-super-channel)?
             +--:(single)
             |  +--rw flexi-n?              l0-types:flexi-n
             |  +--rw flexi-m?              l0-types:flexi-m
             x--:(super)
             |  +--rw subcarrier-flexi-n* [flexi-n]
             |     +--rw flexi-n    l0-types:flexi-n
             |     +--rw flexi-m?   l0-types:flexi-m
             +--:(multi)
                +--rw frequency-slots
                   +--rw frequency-slot* [flexi-n]
                      +--rw flexi-n    l0-types:flexi-n
                      +--rw flexi-m?   l0-types:flexi-m
     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:
       +--:(flexi-grid)
          +--rw (single-or-super-channel)?
             +--:(single)
             |  +--rw flexi-n?              l0-types:flexi-n
             |  +--rw flexi-m?              l0-types:flexi-m
             x--:(super)
             |  +--rw subcarrier-flexi-n* [flexi-n]
             |     +--rw flexi-n    l0-types:flexi-n
             |     +--rw flexi-m?   l0-types:flexi-m
             +--:(multi)
                +--rw frequency-slots
                   +--rw frequency-slot* [flexi-n]
                      +--rw flexi-n    l0-types:flexi-n

Lopez de Vergara, et al.  Expires 1 August 2024                [Page 15]
Internet-Draft               Flexi-Grid YANG                January 2024

                      +--rw flexi-m?   l0-types:flexi-m
     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:
       +--:(flexi-grid)
          +--ro (single-or-super-channel)?
             +--:(single)
             |  +--ro flexi-n?              l0-types:flexi-n
             |  +--ro flexi-m?              l0-types:flexi-m
             x--:(super)
             |  +--ro subcarrier-flexi-n* [flexi-n]
             |     +--ro flexi-n    l0-types:flexi-n
             |     +--ro flexi-m?   l0-types:flexi-m
             +--:(multi)
                +--ro frequency-slots
                   +--ro frequency-slot* [flexi-n]
                      +--ro flexi-n    l0-types:flexi-n
                      +--ro flexi-m?   l0-types:flexi-m
     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:
       +--:(flexi-grid)
          +--ro flexi-n?   l0-types:flexi-n
     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:
       +--:(flexi-grid)
          +--ro flexi-n?   l0-types:flexi-n
     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:
       +--:(flexi-grid)
          x--ro flexi-grid-channel-spacing?   identityref
          +--ro flexi-ncfg?                   identityref
          +--ro flexi-n-step?                 uint8
     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:
       +--:(flexi-grid)
          +--ro (single-or-super-channel)?
             +--:(single)
             |  +--ro flexi-n?              l0-types:flexi-n

Lopez de Vergara, et al.  Expires 1 August 2024                [Page 16]
Internet-Draft               Flexi-Grid YANG                January 2024

             |  +--ro flexi-m?              l0-types:flexi-m
             x--:(super)
             |  +--ro subcarrier-flexi-n* [flexi-n]
             |     +--ro flexi-n    l0-types:flexi-n
             |     +--ro flexi-m?   l0-types:flexi-m
             +--:(multi)
                +--ro frequency-slots
                   +--ro frequency-slot* [flexi-n]
                      +--ro flexi-n    l0-types:flexi-n
                      +--ro flexi-m?   l0-types:flexi-m
     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:
       +--:(flexi-grid)
          +--ro (single-or-super-channel)?
             +--:(single)
             |  +--ro flexi-n?              l0-types:flexi-n
             |  +--ro flexi-m?              l0-types:flexi-m
             x--:(super)
             |  +--ro subcarrier-flexi-n* [flexi-n]
             |     +--ro flexi-n    l0-types:flexi-n
             |     +--ro flexi-m?   l0-types:flexi-m
             +--:(multi)
                +--ro frequency-slots
                   +--ro frequency-slot* [flexi-n]
                      +--ro flexi-n    l0-types:flexi-n
                      +--ro flexi-m?   l0-types:flexi-m
     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:
       +--:(flexi-grid)
          +--ro (single-or-super-channel)?
             +--:(single)
             |  +--ro flexi-n?              l0-types:flexi-n
             |  +--ro flexi-m?              l0-types:flexi-m
             x--:(super)
             |  +--ro subcarrier-flexi-n* [flexi-n]
             |     +--ro flexi-n    l0-types:flexi-n
             |     +--ro flexi-m?   l0-types:flexi-m
             +--:(multi)
                +--ro frequency-slots
                   +--ro frequency-slot* [flexi-n]
                      +--ro flexi-n    l0-types:flexi-n

Lopez de Vergara, et al.  Expires 1 August 2024                [Page 17]
Internet-Draft               Flexi-Grid YANG                January 2024

                      +--ro flexi-m?   l0-types:flexi-m
     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:
       +--:(flexi-grid)
          +--ro (single-or-super-channel)?
             +--:(single)
             |  +--ro flexi-n?              l0-types:flexi-n
             |  +--ro flexi-m?              l0-types:flexi-m
             x--:(super)
             |  +--ro subcarrier-flexi-n* [flexi-n]
             |     +--ro flexi-n    l0-types:flexi-n
             |     +--ro flexi-m?   l0-types:flexi-m
             +--:(multi)
                +--ro frequency-slots
                   +--ro frequency-slot* [flexi-n]
                      +--ro flexi-n    l0-types:flexi-n
                      +--ro flexi-m?   l0-types:flexi-m
     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:
       +--:(flexi-grid)
          +--ro (single-or-super-channel)?
             +--:(single)
             |  +--ro flexi-n?              l0-types:flexi-n
             |  +--ro flexi-m?              l0-types:flexi-m
             x--:(super)
             |  +--ro subcarrier-flexi-n* [flexi-n]
             |     +--ro flexi-n    l0-types:flexi-n
             |     +--ro flexi-m?   l0-types:flexi-m
             +--:(multi)
                +--ro frequency-slots
                   +--ro frequency-slot* [flexi-n]
                      +--ro flexi-n    l0-types:flexi-n
                      +--ro flexi-m?   l0-types:flexi-m
     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:
       +--:(flexi-grid)
          +--ro flexi-n?   l0-types:flexi-n

Lopez de Vergara, et al.  Expires 1 August 2024                [Page 18]
Internet-Draft               Flexi-Grid YANG                January 2024

     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:
       +--:(flexi-grid)
          +--ro flexi-n?   l0-types:flexi-n
     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:
       +--:(flexi-grid)
          x--ro flexi-grid-channel-spacing?   identityref
          +--ro flexi-ncfg?                   identityref
          +--ro flexi-n-step?                 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:
       +--:(flexi-grid)
          +--ro flexi-n?   l0-types:flexi-n
     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:
       +--:(flexi-grid)
          +--ro flexi-n?   l0-types:flexi-n
     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:
       +--:(flexi-grid)
          x--ro flexi-grid-channel-spacing?   identityref
          +--ro flexi-ncfg?                   identityref
          +--ro flexi-n-step?                 uint8
     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:
       +--:(flexi-grid)
          +--ro (single-or-super-channel)?
             +--:(single)
             |  +--ro flexi-n?              l0-types:flexi-n
             |  +--ro flexi-m?              l0-types:flexi-m
             x--:(super)

Lopez de Vergara, et al.  Expires 1 August 2024                [Page 19]
Internet-Draft               Flexi-Grid YANG                January 2024

             |  +--ro subcarrier-flexi-n* [flexi-n]
             |     +--ro flexi-n    l0-types:flexi-n
             |     +--ro flexi-m?   l0-types:flexi-m
             +--:(multi)
                +--ro frequency-slots
                   +--ro frequency-slot* [flexi-n]
                      +--ro flexi-n    l0-types:flexi-n
                      +--ro flexi-m?   l0-types:flexi-m
     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:
       +--:(flexi-grid)
          +--ro (single-or-super-channel)?
             +--:(single)
             |  +--ro flexi-n?              l0-types:flexi-n
             |  +--ro flexi-m?              l0-types:flexi-m
             x--:(super)
             |  +--ro subcarrier-flexi-n* [flexi-n]
             |     +--ro flexi-n    l0-types:flexi-n
             |     +--ro flexi-m?   l0-types:flexi-m
             +--:(multi)
                +--ro frequency-slots
                   +--ro frequency-slot* [flexi-n]
                      +--ro flexi-n    l0-types:flexi-n
                      +--ro flexi-m?   l0-types:flexi-m
     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:
       +--:(flexi-grid)
          +--ro (single-or-super-channel)?
             +--:(single)
             |  +--ro flexi-n?              l0-types:flexi-n
             |  +--ro flexi-m?              l0-types:flexi-m
             x--:(super)
             |  +--ro subcarrier-flexi-n* [flexi-n]
             |     +--ro flexi-n    l0-types:flexi-n
             |     +--ro flexi-m?   l0-types:flexi-m
             +--:(multi)
                +--ro frequency-slots
                   +--ro frequency-slot* [flexi-n]
                      +--ro flexi-n    l0-types:flexi-n
                      +--ro flexi-m?   l0-types:flexi-m

Lopez de Vergara, et al.  Expires 1 August 2024                [Page 20]
Internet-Draft               Flexi-Grid YANG                January 2024

     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-include-objects
               /tet:route-object-include-object/tet:type/tet:label
               /tet:label-hop/tet:te-label/tet:technology:
       +--:(flexi-grid)
          +--ro (single-or-super-channel)?
             +--:(single)
             |  +--ro flexi-n?              l0-types:flexi-n
             |  +--ro flexi-m?              l0-types:flexi-m
             x--:(super)
             |  +--ro subcarrier-flexi-n* [flexi-n]
             |     +--ro flexi-n    l0-types:flexi-n
             |     +--ro flexi-m?   l0-types:flexi-m
             +--:(multi)
                +--ro frequency-slots
                   +--ro frequency-slot* [flexi-n]
                      +--ro flexi-n    l0-types:flexi-n
                      +--ro flexi-m?   l0-types:flexi-m
     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:
       +--:(flexi-grid)
          +--ro (single-or-super-channel)?
             +--:(single)
             |  +--ro flexi-n?              l0-types:flexi-n
             |  +--ro flexi-m?              l0-types:flexi-m
             x--:(super)
             |  +--ro subcarrier-flexi-n* [flexi-n]
             |     +--ro flexi-n    l0-types:flexi-n
             |     +--ro flexi-m?   l0-types:flexi-m
             +--:(multi)
                +--ro frequency-slots
                   +--ro frequency-slot* [flexi-n]
                      +--ro flexi-n    l0-types:flexi-n
                      +--ro flexi-m?   l0-types:flexi-m
     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:
       +--:(flexi-grid)
          +--rw flexi-n?   l0-types:flexi-n
     augment /nw:networks/nw:network/nw:node/tet:te

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               /tet:tunnel-termination-point
               /tet:local-link-connectivities/tet:label-restrictions
               /tet:label-restriction/tet:label-end/tet:te-label
               /tet:technology:
       +--:(flexi-grid)
          +--rw flexi-n?   l0-types:flexi-n
     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:
       +--:(flexi-grid)
          x--rw flexi-grid-channel-spacing?   identityref
          +--rw flexi-ncfg?                   identityref
          +--rw flexi-n-step?                 uint8
     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:
       +--:(flexi-grid)
          +--rw (single-or-super-channel)?
             +--:(single)
             |  +--rw flexi-n?              l0-types:flexi-n
             |  +--rw flexi-m?              l0-types:flexi-m
             x--:(super)
             |  +--rw subcarrier-flexi-n* [flexi-n]
             |     +--rw flexi-n    l0-types:flexi-n
             |     +--rw flexi-m?   l0-types:flexi-m
             +--:(multi)
                +--rw frequency-slots
                   +--rw frequency-slot* [flexi-n]
                      +--rw flexi-n    l0-types:flexi-n
                      +--rw flexi-m?   l0-types:flexi-m
     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:
       +--:(flexi-grid)
          +--rw (single-or-super-channel)?
             +--:(single)
             |  +--rw flexi-n?              l0-types:flexi-n
             |  +--rw flexi-m?              l0-types:flexi-m
             x--:(super)
             |  +--rw subcarrier-flexi-n* [flexi-n]
             |     +--rw flexi-n    l0-types:flexi-n
             |     +--rw flexi-m?   l0-types:flexi-m
             +--:(multi)

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                +--rw frequency-slots
                   +--rw frequency-slot* [flexi-n]
                      +--rw flexi-n    l0-types:flexi-n
                      +--rw flexi-m?   l0-types:flexi-m
     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:
       +--:(flexi-grid)
          +--rw (single-or-super-channel)?
             +--:(single)
             |  +--rw flexi-n?              l0-types:flexi-n
             |  +--rw flexi-m?              l0-types:flexi-m
             x--:(super)
             |  +--rw subcarrier-flexi-n* [flexi-n]
             |     +--rw flexi-n    l0-types:flexi-n
             |     +--rw flexi-m?   l0-types:flexi-m
             +--:(multi)
                +--rw frequency-slots
                   +--rw frequency-slot* [flexi-n]
                      +--rw flexi-n    l0-types:flexi-n
                      +--rw flexi-m?   l0-types:flexi-m
     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:
       +--:(flexi-grid)
          +--rw (single-or-super-channel)?
             +--:(single)
             |  +--rw flexi-n?              l0-types:flexi-n
             |  +--rw flexi-m?              l0-types:flexi-m
             x--:(super)
             |  +--rw subcarrier-flexi-n* [flexi-n]
             |     +--rw flexi-n    l0-types:flexi-n
             |     +--rw flexi-m?   l0-types:flexi-m
             +--:(multi)
                +--rw frequency-slots
                   +--rw frequency-slot* [flexi-n]
                      +--rw flexi-n    l0-types:flexi-n
                      +--rw flexi-m?   l0-types:flexi-m
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:tunnel-termination-point

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               /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:
       +--:(flexi-grid)
          +--ro (single-or-super-channel)?
             +--:(single)
             |  +--ro flexi-n?              l0-types:flexi-n
             |  +--ro flexi-m?              l0-types:flexi-m
             x--:(super)
             |  +--ro subcarrier-flexi-n* [flexi-n]
             |     +--ro flexi-n    l0-types:flexi-n
             |     +--ro flexi-m?   l0-types:flexi-m
             +--:(multi)
                +--ro frequency-slots
                   +--ro frequency-slot* [flexi-n]
                      +--ro flexi-n    l0-types:flexi-n
                      +--ro flexi-m?   l0-types:flexi-m
     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:
       +--:(flexi-grid)
          +--rw flexi-n?   l0-types:flexi-n
     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:
       +--:(flexi-grid)
          +--rw flexi-n?   l0-types:flexi-n
     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:
       +--:(flexi-grid)
          x--rw flexi-grid-channel-spacing?   identityref
          +--rw flexi-ncfg?                   identityref
          +--rw flexi-n-step?                 uint8
     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:

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       +--:(flexi-grid)
          +--rw (single-or-super-channel)?
             +--:(single)
             |  +--rw flexi-n?              l0-types:flexi-n
             |  +--rw flexi-m?              l0-types:flexi-m
             x--:(super)
             |  +--rw subcarrier-flexi-n* [flexi-n]
             |     +--rw flexi-n    l0-types:flexi-n
             |     +--rw flexi-m?   l0-types:flexi-m
             +--:(multi)
                +--rw frequency-slots
                   +--rw frequency-slot* [flexi-n]
                      +--rw flexi-n    l0-types:flexi-n
                      +--rw flexi-m?   l0-types:flexi-m
     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:
       +--:(flexi-grid)
          +--rw (single-or-super-channel)?
             +--:(single)
             |  +--rw flexi-n?              l0-types:flexi-n
             |  +--rw flexi-m?              l0-types:flexi-m
             x--:(super)
             |  +--rw subcarrier-flexi-n* [flexi-n]
             |     +--rw flexi-n    l0-types:flexi-n
             |     +--rw flexi-m?   l0-types:flexi-m
             +--:(multi)
                +--rw frequency-slots
                   +--rw frequency-slot* [flexi-n]
                      +--rw flexi-n    l0-types:flexi-n
                      +--rw flexi-m?   l0-types:flexi-m
     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:
       +--:(flexi-grid)
          +--rw (single-or-super-channel)?
             +--:(single)
             |  +--rw flexi-n?              l0-types:flexi-n
             |  +--rw flexi-m?              l0-types:flexi-m
             x--:(super)

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             |  +--rw subcarrier-flexi-n* [flexi-n]
             |     +--rw flexi-n    l0-types:flexi-n
             |     +--rw flexi-m?   l0-types:flexi-m
             +--:(multi)
                +--rw frequency-slots
                   +--rw frequency-slot* [flexi-n]
                      +--rw flexi-n    l0-types:flexi-n
                      +--rw flexi-m?   l0-types:flexi-m
     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:
       +--:(flexi-grid)
          +--rw (single-or-super-channel)?
             +--:(single)
             |  +--rw flexi-n?              l0-types:flexi-n
             |  +--rw flexi-m?              l0-types:flexi-m
             x--:(super)
             |  +--rw subcarrier-flexi-n* [flexi-n]
             |     +--rw flexi-n    l0-types:flexi-n
             |     +--rw flexi-m?   l0-types:flexi-m
             +--:(multi)
                +--rw frequency-slots
                   +--rw frequency-slot* [flexi-n]
                      +--rw flexi-n    l0-types:flexi-n
                      +--rw flexi-m?   l0-types:flexi-m
     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:
       +--:(flexi-grid)
          +--ro (single-or-super-channel)?
             +--:(single)
             |  +--ro flexi-n?              l0-types:flexi-n
             |  +--ro flexi-m?              l0-types:flexi-m
             x--:(super)
             |  +--ro subcarrier-flexi-n* [flexi-n]
             |     +--ro flexi-n    l0-types:flexi-n
             |     +--ro flexi-m?   l0-types:flexi-m
             +--:(multi)
                +--ro frequency-slots
                   +--ro frequency-slot* [flexi-n]

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                      +--ro flexi-n    l0-types:flexi-n
                      +--ro flexi-m?   l0-types:flexi-m
     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:
       +--:(flexi-grid)
          +--rw (single-or-super-channel)?
             +--:(single)
             |  +--rw flexi-n?              l0-types:flexi-n
             |  +--rw flexi-m?              l0-types:flexi-m
             x--:(super)
             |  +--rw subcarrier-flexi-n* [flexi-n]
             |     +--rw flexi-n    l0-types:flexi-n
             |     +--rw flexi-m?   l0-types:flexi-m
             +--:(multi)
                +--rw frequency-slots
                   +--rw frequency-slot* [flexi-n]
                      +--rw flexi-n    l0-types:flexi-n
                      +--rw flexi-m?   l0-types:flexi-m
     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:
       +--:(flexi-grid)
          +--rw (single-or-super-channel)?
             +--:(single)
             |  +--rw flexi-n?              l0-types:flexi-n
             |  +--rw flexi-m?              l0-types:flexi-m
             x--:(super)
             |  +--rw subcarrier-flexi-n* [flexi-n]
             |     +--rw flexi-n    l0-types:flexi-n
             |     +--rw flexi-m?   l0-types:flexi-m
             +--:(multi)
                +--rw frequency-slots
                   +--rw frequency-slot* [flexi-n]
                      +--rw flexi-n    l0-types:flexi-n
                      +--rw flexi-m?   l0-types:flexi-m
     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:
       +--:(flexi-grid)
          +--rw flexi-n?   l0-types:flexi-n
     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:

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       +--:(flexi-grid)
          +--rw flexi-n?   l0-types:flexi-n
     augment /nw:networks/nw:network/nt:link/tet:te
               /tet:te-link-attributes/tet:label-restrictions
               /tet:label-restriction/tet:label-step/tet:technology:
       +--:(flexi-grid)
          x--rw flexi-grid-channel-spacing?   identityref
          +--rw flexi-ncfg?                   identityref
          +--rw flexi-n-step?                 uint8
     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:
       +--:(flexi-grid)
          +--ro flexi-n?   l0-types:flexi-n
     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:
       +--:(flexi-grid)
          +--ro flexi-n?   l0-types:flexi-n
     augment /nw:networks/nw:network/nt:link/tet:te
               /tet:information-source-entry/tet:label-restrictions
               /tet:label-restriction/tet:label-step/tet:technology:
       +--:(flexi-grid)
          x--ro flexi-grid-channel-spacing?   identityref
          +--ro flexi-ncfg?                   identityref
          +--ro flexi-n-step?                 uint8
     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:
       +--:(flexi-grid)
          +--rw (single-or-super-channel)?
             +--:(single)
             |  +--rw flexi-n?              l0-types:flexi-n
             |  +--rw flexi-m?              l0-types:flexi-m
             x--:(super)
             |  +--rw subcarrier-flexi-n* [flexi-n]
             |     +--rw flexi-n    l0-types:flexi-n
             |     +--rw flexi-m?   l0-types:flexi-m
             +--:(multi)
                +--rw frequency-slots
                   +--rw frequency-slot* [flexi-n]
                      +--rw flexi-n    l0-types:flexi-n
                      +--rw flexi-m?   l0-types:flexi-m
     augment /nw:networks/tet:te/tet:templates/tet:link-template
               /tet:te-link-attributes/tet:underlay/tet:backup-path

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               /tet:path-element/tet:type/tet:label/tet:label-hop
               /tet:te-label/tet:technology:
       +--:(flexi-grid)
          +--rw (single-or-super-channel)?
             +--:(single)
             |  +--rw flexi-n?              l0-types:flexi-n
             |  +--rw flexi-m?              l0-types:flexi-m
             x--:(super)
             |  +--rw subcarrier-flexi-n* [flexi-n]
             |     +--rw flexi-n    l0-types:flexi-n
             |     +--rw flexi-m?   l0-types:flexi-m
             +--:(multi)
                +--rw frequency-slots
                   +--rw frequency-slot* [flexi-n]
                      +--rw flexi-n    l0-types:flexi-n
                      +--rw flexi-m?   l0-types:flexi-m
     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:
       +--:(flexi-grid)
          +--rw flexi-n?   l0-types:flexi-n
     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:
       +--:(flexi-grid)
          +--rw flexi-n?   l0-types:flexi-n
     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:
       +--:(flexi-grid)
          x--rw flexi-grid-channel-spacing?   identityref
          +--rw flexi-ncfg?                   identityref
          +--rw flexi-n-step?                 uint8

                                  Figure 5

7.  The YANG Code for Flexi-grid topology

   <CODE BEGINS> file "ietf-flexi-grid-topology@2023-12-15.yang"
   module ietf-flexi-grid-topology {
     yang-version 1.1;
     namespace "urn:ietf:params:xml:ns:yang:ietf-flexi-grid-topology";
     prefix "flexgt";

     import ietf-network {
       prefix "nw";

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       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
         "RFC 8795: YANG Data Model for Traffic Engineering
          (TE) Topologies";
     }

     import ietf-layer0-types {
       prefix "l0-types";
       reference
         "RFC YYYY: A YANG Data Model for Layer 0 Types";
     }
     /* Note: The RFC Editor will replace YYYY with the number assigned
        to the RFC once draft-ietf-ccamp-rfc9093-bis becomes an RFC.*/

     organization
        "IETF CCAMP Working Group";
     contact
       "WG Web: <https://datatracker.ietf.org/wg/ccamp/>

        WG List: <mailto:ccamp@ietf.org>

        Editor: Jorge E. Lopez de Vergara
                <mailto:jorge.lopez_vergara@uam.es>

        Editor: Daniel Perdices
                <mailto:daniel.perdices@uam.es>

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

        Editor: Daniel King
                <mailto:d.king@lancaster.ac.uk>

        Editor: Young Lee
                <mailto:younglee.tx@gmail.com>";

     description

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       "This YANG module defines a topology model for flexi-grid
        optical networks. The model augments the technology-agnostic
        TE topology model with flexi-grid technology specific
        definitions, based on RFC 7698 and RFC 7699.

        The model fully conforms to the Network Management Datastore
        Architecture (NMDA).

        Copyright (c) 2023 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 Revised
        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.

        The key words 'MUST', 'MUST NOT', 'REQUIRED', 'SHALL', 'SHALL
        NOT', 'SHOULD', 'SHOULD NOT', 'RECOMMENDED', 'NOT RECOMMENDED',
        'MAY', and 'OPTIONAL' in this document are to be interpreted as
        described in BCP 14 (RFC 2119) (RFC 8174) when, and only when,
        they appear in all capitals, as shown here.";
       reference
         "RFC 7698: Framework and Requirements for GMPLS-Based Control
           of Flexi-Grid Dense Wavelength Division Multiplexing
           (DWDM) Networks;
         RFC 7699: Generalized Labels for the Flexi-Grid in Lambda
           Switch Capable (LSC) Label Switching Routers.";

     revision 2023-12-15 {
       description
         "Initial Version";
       reference
         "RFC XXXX: A YANG Data Model for Flexi-Grid Optical Networks";
       // RFC Ed.: replace XXXX with actual RFC number, update date
       // information and remove this note
     }

     /*
      * Groupings
      */

     grouping label-range-info {
       description

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         "Flexi-grid-specific label range related information with a
         presence container indicating whether the label range is a
         flexi-grid label range.";
       container flexi-grid-label-range {
         presence
           "Indicates the label range is a flexi-grid label range.

           This container MUST NOT be present if there are other
           presence containers or attributes indicating another type
           of label range.";
         description
           "Flexi-grid-specific label range related information.";
         uses l0-types:flexi-grid-label-range-info;
       }
     }

     /*
      * Data nodes
      */

     augment "/nw:networks/nw:network/nw:network-types"
           + "/tet:te-topology" {
       description
         "Augment network types to define flexi-grid topology type.";
       container flexi-grid-topology {
         presence
           "Its presence identifies the flexi-grid topology type.";
         description
           "Introduce new network type for flexi-grid topology.";
       }
     }

     augment "/nw:networks/nw:network/nw:node/tet:te"
           + "/tet:te-node-attributes" {
       when "/nw:networks/nw:network/nw:network-types"
          + "/tet:te-topology/flexgt:flexi-grid-topology" {
         description
         "Augmentation parameters apply only for networks with
          flexi-grid topology type.";
       }
       description "Augment TE node attributes.";
       container flexi-grid-node {
         presence "The TE node is a flexi-grid node.";
         description
           "Introduce new TE node type for flexi-grid node.";
       }
     }

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     /*
      * Augment TE label range information
      */

     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/"
          + "flexgt:flexi-grid-topology" {
         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }
       description
         "Augment TE label range information for the TE node
          connectivity matrices.";
       uses label-range-info;
     }

     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" {
       when "../../../../../../../../nw:network-types/tet:te-topology/"
          + "flexgt:flexi-grid-topology" {
         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }
       description
         "Augment TE label range information for the source Link
          Termination Point (LTP) of the connectivity matrix entry.";
       uses label-range-info;
     }

     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/"
          + "flexgt:flexi-grid-topology" {
         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }
       description
         "Augment TE label range information for the destination LTP
          of the connectivity matrix entry.";

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       uses label-range-info;
     }
     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/"
          + "flexgt:flexi-grid-topology" {
         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }
       description
         "Augment TE label range information for the TE node
          connectivity matrices information source.";
       uses label-range-info;
     }

     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" {
       when "../../../../../../../../nw:network-types/tet:te-topology/"
          + "flexgt:flexi-grid-topology" {
         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }
       description
         "Augment TE label range information for the source LTP
          of the connectivity matrix entry information source.";
       uses label-range-info;
     }

     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/"
          + "flexgt:flexi-grid-topology" {
         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }
       description
         "Augment TE label range information for the destination LTP
          of the connectivity matrix entry information source.";
       uses label-range-info;

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     }

     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/"
          + "flexgt:flexi-grid-topology" {
         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }
       description
         "Augment TE label range information for the Tunnel
         Termination Point (TTP) Local Link Connectivities.";
       uses label-range-info;
     }

     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/"
          + "flexgt:flexi-grid-topology" {
         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }
       description
         "Augment TE label range information for the TTP
          Local Link Connectivity entry.";
       uses label-range-info;
     }

     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/"
          + "flexgt:flexi-grid-topology" {
         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }
       description
         "Augment TE label range information for the TE link.";
       uses label-range-info;
     }

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     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/"
          + "flexgt:flexi-grid-topology" {
         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }
       description
         "Augment TE label range information for the TE link
          information source.";
       uses label-range-info;
     }

     augment "/nw:networks/tet:te/tet:templates/"
           + "tet:link-template/tet:te-link-attributes/"
           + "tet:label-restrictions/tet:label-restriction" {
       description
         "Augment TE label range information for the TE link template.";
       uses label-range-info;
     }

     /*
      * Augment TE label
      */

     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/"
          + "flexgt:flexi-grid-topology" {
         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }
       description
         "Augment TE label range start for the TE node
          connectivity matrices.";
       case flexi-grid {
         uses l0-types:flexi-grid-label-start-end;
       }
     }

     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:te-node-attributes/tet:connectivity-matrices/"

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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/"
          + "flexgt:flexi-grid-topology" {
         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }
       description
         "Augment TE label range end for the TE node
          connectivity matrices.";
       case flexi-grid {
         uses l0-types:flexi-grid-label-start-end;
       }
     }

     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/"
          + "flexgt:flexi-grid-topology" {
         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }
       description
         "Augment TE label range step for the TE node
          connectivity matrices.";
       case flexi-grid {
         uses l0-types:flexi-grid-label-step;
       }
     }

     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/"
          + "flexgt:flexi-grid-topology" {
         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }

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       description
         "Augment TE label hop for the underlay primary path of the
          TE node connectivity matrices.";
       case flexi-grid {
         uses l0-types:flexi-grid-label-hop;
       }
     }

     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/"
          + "flexgt:flexi-grid-topology" {
         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }
       description
         "Augment TE label hop for the underlay backup path of the
          TE node connectivity matrices.";
       case flexi-grid {
         uses l0-types:flexi-grid-label-hop;
       }
     }

     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/"
          + "flexgt:flexi-grid-topology" {
         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }
       description
         "Augment TE label hop for the explicit route objects excluded
          by the path computation of the TE node connectivity
          matrices.";
       case flexi-grid {

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         uses l0-types:flexi-grid-label-hop;
       }
     }

     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/"
          + "flexgt:flexi-grid-topology" {
         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }
       description
         "Augment TE label hop for the explicit route objects included
          by the path computation of the TE node connectivity
          matrices.";
       case flexi-grid {
         uses l0-types:flexi-grid-label-hop;
       }
     }

     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/"
          + "flexgt:flexi-grid-topology" {
         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }
       description
         "Augment TE label hop for the computed path route objects
          of the TE node connectivity matrices.";
       case flexi-grid {
         uses l0-types:flexi-grid-label-hop;
       }
     }

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     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/"
          + "flexgt:flexi-grid-topology" {
         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }
       description
         "Augment TE label range start for the source LTP
          of the connectivity matrix entry.";
       case flexi-grid {
         uses l0-types:flexi-grid-label-start-end;
       }
     }

     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/"
          + "flexgt:flexi-grid-topology" {
         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }
       description
         "Augment TE label range end for the source LTP
          of the connectivity matrix entry.";
       case flexi-grid {
         uses l0-types:flexi-grid-label-start-end;
       }
     }

     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" {

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       when "../../../../../../../../../"
          + "nw:network-types/tet:te-topology/"
          + "flexgt:flexi-grid-topology" {
         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }
       description
         "Augment TE label range step for the source LTP
          of the connectivity matrix entry.";
       case flexi-grid {
         uses l0-types:flexi-grid-label-step;
       }
     }

     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/"
          + "flexgt:flexi-grid-topology" {
         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }
       description
         "Augment TE label range start for the destination LTP
          of the connectivity matrix entry.";
       case flexi-grid {
         uses l0-types:flexi-grid-label-start-end;
       }
     }

     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" {
       when "../../../../../../../../../../"
          + "nw:network-types/tet:te-topology/"
          + "flexgt:flexi-grid-topology" {
         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";

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       }
       description
         "Augment TE label range end for the destination LTP
          of the connectivity matrix entry.";
       case flexi-grid {
         uses l0-types:flexi-grid-label-start-end;
       }
     }

     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/"
          + "flexgt:flexi-grid-topology" {
         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }
       description
         "Augment TE label range step for the destination LTP
          of the connectivity matrix entry.";
       case flexi-grid {
         uses l0-types:flexi-grid-label-step;
       }
     }

     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/"
          + "flexgt:flexi-grid-topology" {
         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }
       description
         "Augment TE label hop for the underlay primary path
          of the connectivity matrix entry.";
       case flexi-grid {
         uses l0-types:flexi-grid-label-hop;

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       }
     }

     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/"
          + "flexgt:flexi-grid-topology" {
         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }
       description
         "Augment TE label hop for the underlay backup path
          of the connectivity matrix entry.";
       case flexi-grid {
         uses l0-types:flexi-grid-label-hop;
       }
     }

     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/"
          + "flexgt:flexi-grid-topology" {
         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }
       description
         "Augment TE label hop for the explicit route objects excluded
          by the path computation of the connectivity matrix entry.";
       case flexi-grid {
         uses l0-types:flexi-grid-label-hop;
       }
     }

     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:te-node-attributes/tet:connectivity-matrices/"

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           + "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/"
          + "flexgt:flexi-grid-topology" {
         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }
       description
         "Augment TE label hop for the explicit route objects included
          by the path computation of the connectivity matrix entry.";
       case flexi-grid {
         uses l0-types:flexi-grid-label-hop;
       }
     }

     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/"
          + "flexgt:flexi-grid-topology" {
         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }
       description
         "Augment TE label hop for the computed path route objects
          of the connectivity matrix entry.";
       case flexi-grid {
         uses l0-types:flexi-grid-label-hop;
       }
     }

     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" {
       when "../../../../../../../../"
          + "nw:network-types/tet:te-topology/"

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          + "flexgt:flexi-grid-topology" {
         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }
       description
         "Augment TE label range start for the TE node connectivity
          matrices information source.";
       case flexi-grid {
         uses l0-types:flexi-grid-label-start-end;
       }
     }

     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/"
          + "flexgt:flexi-grid-topology" {
         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }
       description
         "Augment TE label range end for the TE node connectivity
          matrices information source.";
       case flexi-grid {
         uses l0-types:flexi-grid-label-start-end;
       }
     }

     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/"
          + "flexgt:flexi-grid-topology" {
         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }
       description
         "Augment TE label range step for the TE node connectivity
          matrices information source.";

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       case flexi-grid {
         uses l0-types:flexi-grid-label-step;
       }
     }

     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/"
          + "flexgt:flexi-grid-topology" {
         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }
       description
         "Augment TE label hop for the underlay primary path
          of the TE node connectivity matrices of the information
          source entry.";
       case flexi-grid {
         uses l0-types:flexi-grid-label-hop;
       }
     }

     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/"
          + "flexgt:flexi-grid-topology" {
         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }
       description
         "Augment TE label hop for the underlay backup path
          of the TE node connectivity matrices of the information
          source entry.";
       case flexi-grid {
         uses l0-types:flexi-grid-label-hop;
       }
     }

     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:information-source-entry/tet:connectivity-matrices/"
           + "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" {
       when "../../../../../../../../../../"
          + "nw:network-types/tet:te-topology/"
          + "flexgt:flexi-grid-topology" {
         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }
       description
         "Augment TE label hop for the explicit route objects excluded
          by the path computation of the TE node connectivity matrices
          information source.";
       case flexi-grid {
         uses l0-types:flexi-grid-label-hop;
       }
     }

     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/"
          + "flexgt:flexi-grid-topology" {
         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }
       description
         "Augment TE label hop for the explicit route objects included
          by the path computation of the TE node connectivity matrices
          information source.";
       case flexi-grid {
         uses l0-types:flexi-grid-label-hop;
       }
     }

     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" {

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       when "../../../../../../../../../"
          + "nw:network-types/tet:te-topology/"
          + "flexgt:flexi-grid-topology" {
         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }
       description
         "Augment TE label hop for the computed path route objects
          of the TE node connectivity matrices information source.";
       case flexi-grid {
         uses l0-types:flexi-grid-label-hop;
       }
     }

     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/"
          + "flexgt:flexi-grid-topology" {
         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }
       description
         "Augment TE label range start for the source LTP
          of the connectivity matrix entry information source.";
       case flexi-grid {
         uses l0-types:flexi-grid-label-start-end;
       }
     }
     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/"
          + "flexgt:flexi-grid-topology" {
         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }

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       description
         "Augment TE label range end for the source LTP
          of the connectivity matrix entry information source.";
       case flexi-grid {
         uses l0-types:flexi-grid-label-start-end;
       }
     }

     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/"
          + "flexgt:flexi-grid-topology" {
         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }
       description
         "Augment TE label range step for the source LTP
          of the connectivity matrix entry information source.";
       case flexi-grid {
         uses l0-types:flexi-grid-label-step;
       }
     }

     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/"
          + "flexgt:flexi-grid-topology" {
         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }
       description
         "Augment TE label range start for the destination LTP
          of the connectivity matrix entry information source.";
       case flexi-grid {
         uses l0-types:flexi-grid-label-start-end;
       }
     }

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     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/"
          + "flexgt:flexi-grid-topology" {
         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }
       description
         "Augment TE label range end for the destination LTP
          of the connectivity matrix entry information source.";
       case flexi-grid {
         uses l0-types:flexi-grid-label-start-end;
       }
     }

     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/"
          + "flexgt:flexi-grid-topology" {
         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }
       description
         "Augment TE label range step for the destination LTP
          of the connectivity matrix entry information source.";
       case flexi-grid {
         uses l0-types:flexi-grid-label-step;
       }
     }

     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/"
          + "flexgt:flexi-grid-topology" {

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         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }
       description
         "Augment TE label hop for the underlay primary path
          of the connectivity matrix entry information source.";
       case flexi-grid {
         uses l0-types:flexi-grid-label-hop;
       }
     }

     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/"
          + "flexgt:flexi-grid-topology" {
         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }
       description
         "Augment TE label hop for the underlay backup path
          of the connectivity matrix entry information source.";
       case flexi-grid {
         uses l0-types:flexi-grid-label-hop;
       }
     }

     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/"
          + "flexgt:flexi-grid-topology" {
         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }
       description

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         "Augment TE label hop for the explicit route objects excluded
          by the path computation of the connectivity matrix entry
          information source.";
       case flexi-grid {
         uses l0-types:flexi-grid-label-hop;
       }
     }

     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-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/"
          + "flexgt:flexi-grid-topology" {
         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }
       description
         "Augment TE label hop for the explicit route objects included
          by the path computation of the connectivity matrix entry
          information source.";
       case flexi-grid {
         uses l0-types:flexi-grid-label-hop;
       }
     }

     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/"
          + "flexgt:flexi-grid-topology" {
         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }
       description
         "Augment TE label hop for the computed path route objects
          of the connectivity matrix entry information source.";

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       case flexi-grid {
         uses l0-types:flexi-grid-label-hop;
       }
     }

     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/"
          + "flexgt:flexi-grid-topology" {
         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }
       description
         "Augment TE label range start for the TTP
          Local Link Connectivities.";
       case flexi-grid {
         uses l0-types:flexi-grid-label-start-end;
       }
     }

     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/"
          + "flexgt:flexi-grid-topology" {
         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }
       description
         "Augment TE label range end for the TTP
          Local Link Connectivities.";
       case flexi-grid {
         uses l0-types:flexi-grid-label-start-end;
       }
     }

     augment "/nw:networks/nw:network/nw:node/tet:te/"

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           + "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/"
          + "flexgt:flexi-grid-topology" {
         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }
       description
         "Augment TE label range step for the TTP
          Local Link Connectivities.";
       case flexi-grid {
         uses l0-types:flexi-grid-label-step;
       }
     }

     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/"
          + "flexgt:flexi-grid-topology" {
         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }
       description
         "Augment TE label hop for the underlay primary path
          of the TTP Local Link Connectivities.";
       case flexi-grid {
         uses l0-types:flexi-grid-label-hop;
       }
     }

     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/"
          + "flexgt:flexi-grid-topology" {

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         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }
       description
         "Augment TE label hop for the underlay backup path
          of the TTP Local Link Connectivities.";
       case flexi-grid {
         uses l0-types:flexi-grid-label-hop;
       }
     }

     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/"
          + "flexgt:flexi-grid-topology" {
         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }
       description
         "Augment TE label hop for the explicit route objects excluded
          by the path computation of the TTP Local Link
          Connectivities.";
       case flexi-grid {
         uses l0-types:flexi-grid-label-hop;
       }
     }

     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/"
          + "flexgt:flexi-grid-topology" {
         description

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           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }
       description
         "Augment TE label hop for the explicit route objects included
          by the path computation of the TTP Local Link
          Connectivities.";
       case flexi-grid {
         uses l0-types:flexi-grid-label-hop;
       }
     }

     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/"
          + "flexgt:flexi-grid-topology" {
         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }
       description
         "Augment TE label hop for the computed path route objects
          of the TTP Local Link Connectivities.";
       case flexi-grid {
         uses l0-types:flexi-grid-label-hop;
       }
     }

     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/"
          + "flexgt:flexi-grid-topology" {
         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }
       description
         "Augment TE label range start for the TTP

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          Local Link Connectivity entry.";
       case flexi-grid {
         uses l0-types:flexi-grid-label-start-end;
       }
     }

     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/"
          + "flexgt:flexi-grid-topology" {
         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }
       description
         "Augment TE label range end for the TTP
          Local Link Connectivity entry.";
       case flexi-grid {
         uses l0-types:flexi-grid-label-start-end;
       }
     }

     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/"
          + "flexgt:flexi-grid-topology" {
         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }
       description
         "Augment TE label range step for the TTP
          Local Link Connectivity entry.";
       case flexi-grid {
         uses l0-types:flexi-grid-label-step;
       }
     }

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     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/"
          + "flexgt:flexi-grid-topology" {
         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }
       description
         "Augment TE label hop for the underlay primary path
          of the TTP Local Link Connectivity entry.";
       case flexi-grid {
         uses l0-types:flexi-grid-label-hop;
       }
     }

     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 "../../../../../../../../../../"
          + "nw:network-types/tet:te-topology/"
          + "flexgt:flexi-grid-topology" {
         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }
       description
         "Augment TE label hop for the underlay backup path
          of the TTP Local Link Connectivity entry.";
       case flexi-grid {
         uses l0-types:flexi-grid-label-hop;
       }
     }

     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/"

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           + "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/"
          + "flexgt:flexi-grid-topology" {
         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }
       description
         "Augment TE label hop for the explicit route objects excluded
          by the path computation of the TTP Local Link
          Connectivity entry.";
       case flexi-grid {
         uses l0-types:flexi-grid-label-hop;
       }
     }

     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/"
          + "flexgt:flexi-grid-topology" {
         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }
       description
         "Augment TE label hop for the explicit route objects included
          by the path computation of the TTP Local Link
          Connectivity entry.";
       case flexi-grid {
         uses l0-types:flexi-grid-label-hop;
       }
     }

     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:tunnel-termination-point/"
           + "tet:local-link-connectivities/"
           + "tet:local-link-connectivity/"

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           + "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/"
          + "flexgt:flexi-grid-topology" {
         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }
       description
         "Augment TE label hop for the computed path route objects
          of the TTP Local Link Connectivity entry.";
       case flexi-grid {
         uses l0-types:flexi-grid-label-hop;
       }
     }
     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/"
          + "flexgt:flexi-grid-topology" {
         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }
       description
         "Augment TE label hop for the underlay primary path
          of the TE link.";
       case flexi-grid {
         uses l0-types:flexi-grid-label-hop;
       }
     }

     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 "../../../../../../../../"
          + "nw:network-types/tet:te-topology/"
          + "flexgt:flexi-grid-topology" {
         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }
       description

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         "Augment TE label hop for the underlay backup path
          of the TE link.";
       case flexi-grid {
         uses l0-types:flexi-grid-label-hop;
       }
     }

     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/"
          + "flexgt:flexi-grid-topology" {
         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }
       description
         "Augment TE label range start for the TE link.";
       case flexi-grid {
         uses l0-types:flexi-grid-label-start-end;
       }
     }

     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/"
          + "flexgt:flexi-grid-topology" {
         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }
       description
         "Augment TE label range end for the TE link.";
       case flexi-grid {
         uses l0-types:flexi-grid-label-start-end;
       }
     }

     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/"
          + "flexgt:flexi-grid-topology" {
         description

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           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }
       description
         "Augment TE label range step for the TE link.";
       case flexi-grid {
         uses l0-types:flexi-grid-label-step;
       }
     }

     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/"
          + "flexgt:flexi-grid-topology" {
         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }
       description
         "Augment TE label range start for the TE link
          information source.";
       case flexi-grid {
         uses l0-types:flexi-grid-label-start-end;
       }
     }

     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" {
       when "../../../../../../../nw:network-types/tet:te-topology/"
          + "flexgt:flexi-grid-topology" {
         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }
       description
         "Augment TE label range end for the TE link
          information source.";
       case flexi-grid {
         uses l0-types:flexi-grid-label-start-end;
       }
     }

     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-step/tet:technology" {
       when "../../../../../../nw:network-types/tet:te-topology/"
          + "flexgt:flexi-grid-topology" {
         description
           "Augmentation parameters apply only for networks with
            flexi-grid topology type.";
       }
       description
         "Augment TE label range step for the TE link
          information source.";
       case flexi-grid {
         uses l0-types:flexi-grid-label-step;
       }
     }

     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" {
       description
         "Augment TE label hop for the underlay primary path
          of the TE link template.";
       case flexi-grid {
         uses l0-types:flexi-grid-label-hop;
       }
     }

     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" {
       description
         "Augment TE label hop for the underlay backup path
          of the TE link template.";
       case flexi-grid {
         uses l0-types:flexi-grid-label-hop;
       }
     }

     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" {
       description
         "Augment TE label range start for the TE link template.";
       case flexi-grid {
         uses l0-types:flexi-grid-label-start-end;

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       }
     }

     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" {
       description
         "Augment TE label range end for the TE link template.";
       case flexi-grid {
         uses l0-types:flexi-grid-label-start-end;
       }
     }

     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" {
       description
         "Augment TE label range step for the TE link template.";
       case flexi-grid {
         uses l0-types:flexi-grid-label-step;
       }
     }
   }
   <CODE ENDS>

                                  Figure 6

8.  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
   Transport Layer Security (TLS) [RFC8446].

   The NETCONF access control model [RFC8341] provides the means to
   restrict access for particular NETCONF users to a preconfigured
   subset of all available NETCONF protocol operations and content.  The
   NETCONF Protocol SSH [RFC6242] describes a method for invoking and
   running NETCONF within a SSH session as an SSH subsystem.  The
   Network Configuration Access Control Model (NACM) [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.

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   A number of configuration data nodes defined in this document are
   writable/deletable (i.e., "config true").  These data nodes may be
   considered sensitive or vulnerable in some network environments.

   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/nw:node/tet:te/tet:te-node-attributes
         /te-connectivity-matrices/te-connectivity-matrix/tet:path-
         constraints/tet:te-bandwidth/tet:technology
         /nw:networks/nw:network/nw:node/tet:te
         /tet:tunnel-termination-point/tet:local-link-connectivities
         /tet:label-restrictions/tet:label-restriction

9.  IANA Considerations

   IANA is requested to assigned a new URI from the "IETF XML Registry"
   [RFC3688] as follows:

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

   IANA is requested to assign a new YANG module name in the "YANG
   Module Names" registry [RFC6020] as follows:

         Name: ietf-flexi-grid-topology
         Namespace: urn:ietf:params:xml:ns:yang:ietf-flexi-grid-topology
         Prefix: flexgt
         Reference: RFC XXXX

10.  References

10.1.  Normative References

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   [I-D.ietf-ccamp-rfc9093-bis]
              Belotti, S., Busi, I., Beller, D., Zheng, H., Le Rouzic,
              E., Guo, A., and D. King, "A YANG Data Model for Layer 0
              Types", Work in Progress, Internet-Draft, draft-ietf-
              ccamp-rfc9093-bis-07, 23 October 2023,
              <https://datatracker.ietf.org/doc/html/draft-ietf-ccamp-
              rfc9093-bis-07>.

   [ITU-T_G.694.1]
              ITU-T Recommendation G.694.1, "Spectral grids for WDM
              applications: DWDM frequency grid", ITU-T G.694.1 ,
              October 2020.

   [ITU-T_G.872]
              International Telecommunication Union, "Architecture of
              optical transport networks", ITU-T G.872 Amendment 1 ,
              January 2021.

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

   [RFC6020]  Bjorklund, M., Ed., "YANG - A Data Modeling Language for
              the Network Configuration Protocol (NETCONF)", RFC 6020,
              DOI 10.17487/RFC6020, October 2010,
              <https://www.rfc-editor.org/rfc/rfc6020>.

   [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/rfc/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/rfc/rfc6242>.

   [RFC7699]  Farrel, A., King, D., Li, Y., and F. Zhang, "Generalized
              Labels for the Flexi-Grid in Lambda Switch Capable (LSC)
              Label Switching Routers", RFC 7699, DOI 10.17487/RFC7699,
              November 2015, <https://www.rfc-editor.org/rfc/rfc7699>.

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

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

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   [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/rfc/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/rfc/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/rfc/rfc8345>.

   [RFC8363]  Zhang, X., Zheng, H., Casellas, R., Gonzalez de Dios, O.,
              and D. Ceccarelli, "GMPLS OSPF-TE Extensions in Support of
              Flexi-Grid Dense Wavelength Division Multiplexing (DWDM)
              Networks", RFC 8363, DOI 10.17487/RFC8363, May 2018,
              <https://www.rfc-editor.org/rfc/rfc8363>.

   [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/rfc/rfc8446>.

   [RFC8795]  Liu, X., Bryskin, I., Beeram, V., Saad, T., Shah, H., and
              O. Gonzalez de Dios, "YANG Data Model for Traffic
              Engineering (TE) Topologies", RFC 8795,
              DOI 10.17487/RFC8795, August 2020,
              <https://www.rfc-editor.org/rfc/rfc8795>.

10.2.  Informative References

   [I-D.ietf-ccamp-flexigrid-tunnel-yang]
              de Madrid, U. A., Burrero, D. P., King, D., Lopez, V.,
              Busi, I., Belotti, S., and G. Galimberti, "A YANG Data
              Model for Flexi-Grid Tunnels", Work in Progress, Internet-
              Draft, draft-ietf-ccamp-flexigrid-tunnel-yang-03, 10 July
              2023, <https://datatracker.ietf.org/doc/html/draft-ietf-
              ccamp-flexigrid-tunnel-yang-03>.

   [I-D.ietf-ccamp-optical-impairment-topology-yang]
              Beller, D., Le Rouzic, E., Belotti, S., Galimberti, G.,
              and I. Busi, "A YANG Data Model for Optical Impairment-
              aware Topology", Work in Progress, Internet-Draft, draft-
              ietf-ccamp-optical-impairment-topology-yang-14, 23 October
              2023, <https://datatracker.ietf.org/doc/html/draft-ietf-
              ccamp-optical-impairment-topology-yang-14>.

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   [RFC7698]  Gonzalez de Dios, O., Ed., Casellas, R., Ed., Zhang, F.,
              Fu, X., Ceccarelli, D., and I. Hussain, "Framework and
              Requirements for GMPLS-Based Control of Flexi-Grid Dense
              Wavelength Division Multiplexing (DWDM) Networks",
              RFC 7698, DOI 10.17487/RFC7698, November 2015,
              <https://www.rfc-editor.org/rfc/rfc7698>.

   [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/rfc/rfc8340>.

Acknowledgments

   The work presented in this document has been partially funded by the
   European Commission under the project H2020 METRO-HAUL (Metro High
   bandwidth, 5G Application-aware optical network, with edge storage,
   compUte and low Latency), Grant Agreement number: 761727.

   This work is also partially funded by the Spanish State Research
   Agency under the project AgileMon (AEI PID2019-104451RB-C21) and by
   the Spanish Ministry of Science, Innovation and Universities under
   the program for the training of university lecturers (Grant number:
   FPU19/05678).

   Thanks to Adrian Farrel for reviewing this document and assisting
   with conversion to XML.

Contributors

   Oscar Gonzalez de Dios
   Telefonica
   Email: oscar.gonzalezdedios@telefonica.com

   Gabriele Galimberti
   Email: ggalimbe56@gmail.com

   Sergio Belotti
   Nokia
   Email: sergio.belotti@nokia.com

   Zafar Ali
   Cisco
   Email: zali@cisco.com

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   Daniel Michaud Vallinoto
   Universidad Autonoma de Madrid
   Email: daniel.michaud@estudiante.uam.es

   Steven Hill
   MTN Group Technology
   Email: Steven.Hill@mtn.com

   Victor Lopez
   Nokia
   Email: victor.lopez@nokia.com

   Italo Busi
   Huawei Technologies
   Email: italo.busi@huawei.com

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

Authors' Addresses

   Jorge E. Lopez de Vergara Mendez
   Naudit HPCN
   Email: jorge.lopez_vergara@uam.es

   Daniel Perdices Burrero
   Universidad Autonoma de Madrid
   Email: daniel.perdices@uam.es

   Daniel King
   Old Dog Consulting
   Email: daniel@olddog.co.uk

   Young Lee
   Samsung
   Email: younglee.tx@gmail.com

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   Haomian Zheng
   Huawei Technologies
   Email: zhenghaomian@huawei.com

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