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Versions: (draft-vergara-ccamp-flexigrid-yang) 00 01 02 03 04

CCAMP Working Group                              J.E. Lopez de Vergara
Internet Draft                          Universidad Autonoma de Madrid
Intended status: Standards Track                           D. Perdices
Expires: January 8, 2020                                   Naudit HPCN
                                                              V. Lopez
                                                   Telefonica I+D/GCTO
                                                               D. King
                                                  Lancaster University
                                                                Y. Lee
                                                             Futurewei
                                                          July 7, 2019

              YANG data model for Flexi-Grid Optical Networks
                   draft-ietf-ccamp-flexigrid-yang-04.txt


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   This Internet-Draft will expire on January 8, 2020.

Copyright Notice

   Copyright (c) 2019 IETF Trust and the persons identified as the
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   publication of this document. Please review these documents


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   carefully, as they describe your rights and restrictions with
   respect to this document. Code Components extracted from this
   document must include Simplified BSD License text as described in
   Section 4.e of the Trust Legal Provisions and are provided without
   warranty as described in the Simplified BSD License.

Abstract

   This document defines a YANG model for managing flexi-grid optical
   Networks. The model described in this document defines a flexi-grid
   traffic engineering database. A complementary module is referenced
   to detail the flexi-grid media channels.

   This module is grounded on other defined YANG abstract models.

Table of Contents

   1. Introduction ..............................................  2
   2. Conventions used in this document .........................  3
      2.1. Terminology ..........................................  3
      2.2. Tree diagram .........................................
      2.3. Prefixes in Data Node Names ..........................
   3. Flexi-grid network topology model overview ................
   4. Main building blocks of the Flexi-grid TED.................
      4.1 Formal Syntax .........................................
   5. Example of use ............................................
   6. Flexi-grid TED YANG Model..................................
      6.1. YANG Model - Tree ....................................
      6.2. YANG Model - Code ....................................
      6.3. License ..............................................
   7. Security Considerations ...................................
   8. IANA Considerations .......................................
   9. References ................................................
      9.1. Normative References .................................
      9.2. Informative References ...............................
   10. Contributors .............................................
   11. Acknowledgments ..........................................
   Authors' Addresses ...........................................


1. Introduction

   Internet-based traffic is dramatically increasing every year.
   Moreover, such traffic is also becoming more dynamic. Thus,
   transport networks need to evolve from current DWDM systems towards
   elastic optical networks, based on flexi-grid transmission and
   switching technologies [RFC7698]. This technology aims at increasing
   both transport network scalability and flexibility, allowing the
   optimization of bandwidth usage.


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   This document presents a YANG [RFC7950] model for flexi-grid objects
   in the dynamic optical network, including the nodes, transponders
   and links between them, as well as how such links interconnect nodes
   and transponders.

   The YANG model for flexi-grid networks allows the representation of
   the flexi-grid optical layer of a network, combined with the
   underlying physical layer.

   This document identifies the flexi-grid components, parameters and
   their values, characterizes the features and the performances of the
   flexi-grid elements. An application example is provided towards the
   end of the document to better understand their utility.

2. Conventions used in this document

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in [RFC2119].

   In this document, these words will appear with that interpretation
   only when in ALL CAPS. Lower case uses of these words are not to be
   interpreted as carrying RFC-2119 significance.

   In this document, the characters ">>" preceding an indented line(s)
   indicates a compliance requirement statement using the key words
   listed above. This convention aids reviewers in quickly identifying
   or finding the explicit compliance requirements of this RFC.

2.1. Terminology

   Refer to [RFC7446] and [RFC7581] for the key terms used in this
   document.

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

   o client
   o server
   o augment
   o data model
   o data node

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

   o  configuration data
   o  state data

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

2.2. Tree diagram

   A simplified graphical representation of the data model is used in
   chapter 6 of this this document.  The meaning of the symbols in
   these diagrams is defined in [RFC8340].

2.3. 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.


      +-------------+-------------------------+-----------------+
      | Prefix      | YANG module             | Reference       |
      +-------------+-------------------------+-----------------+
      | layer0-type | ietf-layer0-types       | [Layer0-Types]  |
      | flexi-grid  | ietf-flexi-grid-topology| [RFCXXXX]       |
      | nw          | ietf-network            | [RFC8345]       |
      | nt          | ietf-network-topology   | [RFC8345]       |
      | tet         | ietf-te-topology        | [TE-TOPO]       |
      +-------------+-------------------------+-----------------+

             Table 1: Prefixes and corresponding YANG modules

   Note: The RFC Editor will replace XXXX with the number assigned to
   the RFC once this draft becomes an RFC.

3. Flexi-grid network topology model overview

   YANG is a data modeling language used to model configuration data
   manipulated by the NETCONF protocol. Several YANG models have already
   been specified for network configurations. For instance, the work in
   [RFC8345] has proposed a generic YANG model for network/service
   topologies and inventories. The work in [TE-TOPO] presents a data
   model to represent, retrieve and manipulate Traffic Engineering (TE)
   Topologies. These models serve as base models that other technology
   specific models can augment. A YANG model has also been proposed in
   [I-D.draft-dharini-ccamp-dwdm-if-yang] to manage single channel
   optical interface parameters of DWDM applications, and in
   [I-D.draft-ietf-ccamp-wson-yang] another model has been specified for
   the routing and wavelength assignment TE topology in wavelength
   switched optical networks (WSONs). None of them are specific for
   flexi-grid technology.

   Then, as stated before, we propose a model to describe a flexi-grid
   topology that is split in two YANG sub-modules:

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   o Flexi-grid-topology: In order to be compatible with existing
     proposals, we augment the definitions contained in
     [RFC8345] and [TE-TOPO], by defining the different elements we
     can find in a flexi-grid network: a node, a transponder and a
     link. For that, each of those elements is defined as a container
     that includes a group of attributes. References to the elements
     are provided to be later used in the definition of a media
     channel. Data types for the type of modulation, the flexi-grid
     technology, the FEC, etc. are defined in [Layer0-Types].
   o Media-channel: This module defines the whole path from a source
     transponder to the destination through a number of intermediate
     nodes and links. For this, it takes the information defined before
     in the flexi-grid topology. This module is described in
     [I-D.draft-ietf-ccamp-flexigrid-media-channel-yang].

     The following section provides a detailed view of the first module.


4. Main building blocks of the Flexi-grid topology

   This section details the defined YANG module. It is listed below in
   section 6.


   The description of the three main components, flexi-grid-node,
   flexi-grid-transponder and flexi-grid-link is provided below.
   flexi-grid-sliceable-transponders are also defined.

   <flexi-grid-node> ::= <config> <state>

       <flexi-grid-node>: This element designates a node in the
       network.

       <config> ::= <flexi-grid-node-attributes-config>

           <config>: Contains the configuration of a node.
           <flexi-grid-node-attributes-config> ::= <list-interface>
           <connectivity_matrix>

               <flexi-grid-node-attributes-config>: Contains all the
               attributes related to the node configuration, such as
               its interfaces or its management addresses.
                   <list-interface> ::= <name> <port-number>
                   <input-port> <output-port> <description>
                   <interface-type>
                   [<numbered-interface> / <unnumbered-interface>]

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                       <list-interface>: The list containing all the
                       information of the interfaces.

                       <name>: Determines the interface name.

                       <port-number>: Port number of the interface.

                       <input-port>: Boolean value that defines
                       whether the interface is input or not.

                       <output-port>: Boolean value that defines
                       whether the interface is output or not.

                       <description>: Description of the usage of
                       the interface.

                       <interface-type>: Determines if the interface
                       is numbered or unnumbered.

                       <numbered-interface> ::= <n-i-ip-address>
                           <numbered-interface>: An interface with
                           its own IP address.

                           <n-i-ip-address>: Only available if
                           <interface-type> is "numbered-interface".
                           Determines the IP address of the interface.

                       <unnumbered-interface> ::= <u-i-ip-address>
                       <label>
                           <unnumbered-interface>: A interface that
                           needs a label to be unique.

                           <u-i-ip-address>: Only available if
                           <interface-type> is "numbered-interface".
                           Determines the node IP address, which with
                           the label defines the interface.

                           <label>: Label that determines the
                           interface, joint with the node IP address.

                   <connectivity-matrix> ::= <connections>

                       <connectivity-matrix>: Determines whether a
                       connection port in/port out exists.

                       <connections> ::= <input-port-id>
                       <output-port-id>

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<flexi-grid-transponder> ::= <transponder-type> <config> <state>


    <flexi-grid-transponder>: This item designates a transponder
    of a node.

    <config> ::= <flexi-grid-transponder-attributes-config>

        <config>: Contains the configuration of a transponder.

        <flexi-grid-transponder-attributes-config> ::=
        <available-operational-mode> <operational-mode>

            <flexi-grid-transponder-attributes>: Contains all the
            attributes related to the transponder.

               <available-operational-mode>: It provides a list of the
               operational modes available at this transponder.

               <operational-mode>: Determines the type of operational
               mode in use.

     <state> ::= <flexi-grid-transponder-attributes-config>
     <flexi-grid-transponder-attributes-state>

         <state>: Contains the state of a transponder.

         <flexi-grid-transponder-attributes-config>: See above.

         <flexi-grid-transponder-attributes-state>: Contains the
         state of a transponder.

 <link> ::= <config> <state>

     <link>: This element describes all the information of a link.

     <config> ::= <flexi-grid-link-attributes-config>

         <config>: Contains the configuration of a link.


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         <flexi-grid-link-attributes-config> ::= <technology-type>
         <available-label-flexi-grid> <N-max> <base-frequency>
         <nominal-central-frequency-granularity>
         <slot-width-granularity>

            <flexi-grid-link-attributes>: Contains all the
            attributes related to the link, such as its unique id,
            its N value, its latency, etc.

            <link-id>: Unique id of the link.

            <available-label-flexi-grid>: Array of bits that
            determines, with each bit, the availability of each
            interface for flexi-grid technology.

            <N-max>: The max value of N in this link, being N
            the number of slots.

            <base-frequency>: The default central frequency
            used in the link.

            <nominal-central-frequency-granularity>: It is the
            spacing between allowed nominal central frequencies
            and it is set to 6.25 GHz (note: sometimes referred
            to as 0.00625 THz).

            <slot-width-granularity>: 12.5 GHz, as defined
            in G.694.1.
    <state> ::= <flexi-grid-link-attributes-config>
    <flexi-grid-link-attributes-state>

        <state>: Contains the state of a link.

        <flexi-grid-link-attributes-config>: See above.

        <flexi-grid-link-attributes-state>: Contains all the
        the information related to the state of a link.


4.1. Formal Syntax

   The previous syntax specification uses the augmented Backus-Naur
   Form (BNF) as described in [RFC5234].


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5. 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 between them. Figure 1 shows a simple
   topology, where two physical paths interconnect two optical
   transponders.
                               Media channel
            <==================================================>
                                  Path x
            <-------------------------------------------------->

                     +----------+          +----------+
              Link 1 |Flexi-grid|  Link 2  |Flexi-grid| Link 3
                .--->|   node   |<-------->|   node   |<---.
                |    |    B     |          |    C     |    |
                |    +----------+          +----------+    |
                v                                          v
             /-----------\                       /-----------\
            / Flexi-grid  \                     / Flexi-grid  \
            | transponder |                     | transponder |
            \      A      /                     \      E      /
             \-----------/                       \-----------/
                  ^                                     ^
                  |             +----------+            |
                  |    Link 4   |Flexi-grid|   Link 5   |
                  '------------>|   node   |<-----------'
                                |    D     |
                                +----------+
            <-------------------------------------------------->
                                  Path y

                      Figure 1. Topology example.

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

   1. We define the transponders A and E, including their FEC type, if
      enabled, and modulation type. We also provide node identifiers
      and addresses for the transponders, as well as interfaces
      included in the transponders. Sliceable transponders can also be
      defined if needed.

   2. 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.

   3. Then, we also define the links 1 to 5 that interconnect nodes and
      transponders, indicating which flexi-grid labels are available.
      Other information, such as the slot frequency and granularity are
      also provided.

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   Next, we can configure the media channel from the information we
   have stored in the flexi-grid TED, by querying which elements are
   available, and planning the resources that have to be provided on
   each situation. Note that every element in the flexi-grid TED has a
   reference, and this is the way in which they are called in the media
   channel. We refer to
   [I-D.draft-ietf-ccamp-flexigrid-media-channel-yang] to complete
   this example.


6. Flexi-grid TED YANG Model

6.1. Yang Model - Tree Structure

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/nt:link/tet:te/
    tet:te-link-attributes:
  augment /nw:networks/nw:network/nw:node/nt:termination-point/tet:te:
    +--rw supported-payload-types* [index]
    |  +--rw index           uint16
    |  +--rw payload-type?   string
    +--rw client-facing?             boolean
  augment /nw:networks/nw:network/nw:node/tet:te/tet:te-node-attributes:
    +--rw flexi-grid-node
       +--rw node-type?   identityref
  augment /nw:networks/nw:network/nw:node/tet:te/
    tet:tunnel-termination-point:
    +--rw supported-operational-modes*    layer0-types:operational-mode
    +--rw configured-operational-modes?   layer0-types:operational-mode
    +--rw supported-fec-types*            identityref
    +--rw supported-termination-types*    identityref
    +--rw supports-bit-stuffing?          boolean
    +--rw is-tunable?                     boolean
    +--rw max-subcarrier-channel-num?     uint8
    +--rw supports-flexi-grid?            boolean
  augment /nw:networks/nw:network/nw:node/nt:termination-point/tet:te/
    tet:interface-switching-capability/tet:max-lsp-bandwidth/
    tet:te-bandwidth/tet:technology:
    +--:(flexi-grid)
       +--rw bandwidth-type?   identityref
  augment /nw:networks/nw:network/nw:node/tet:te/tet:te-node-attributes/
    tet:connectivity-matrices/tet:path-constraints/tet:te-bandwidth/
    tet:technology:
    +--:(flexi-grid)
       +--rw supported-bandwidth-list*   identityref

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  augment /nw:networks/nw:network/nw:node/tet:te/tet:te-node-attributes/
    tet:connectivity-matrices/tet:connectivity-matrix/
    tet:path-constraints/tet:te-bandwidth/tet:technology:
    +--:(flexi-grid)
       +--rw supported-bandwidth-list*   identityref
  augment /nw:networks/nw:network/nw:node/tet:te/
    tet:information-source-entry/tet:connectivity-matrices/
    tet:path-constraints/tet:te-bandwidth/tet:technology:
    +--:(flexi-grid)
       +--ro supported-bandwidth-list*   identityref
  augment /nw:networks/nw:network/nw:node/tet:te/
    tet:information-source-entry/tet:connectivity-matrices/
    tet:connectivity-matrix/tet:path-constraints/tet:te-bandwidth/
    tet:technology:
    +--:(flexi-grid)
       +--ro supported-bandwidth-list*   identityref
  augment /nw:networks/nw:network/nw:node/tet:te/
    tet:tunnel-termination-point/tet:client-layer-adaptation/
    tet:switching-capability/tet:te-bandwidth/tet:technology:
    +--:(flexi-grid)
       +--rw supported-bandwidth-list*   identityref
  augment /nw:networks/nw:network/nw:node/tet:te/
    tet:tunnel-termination-point/tet:local-link-connectivities/
    tet:path-constraints/tet:te-bandwidth/tet:technology:
    +--:(flexi-grid)
       +--rw supported-bandwidth-list*   identityref
  augment /nw:networks/nw:network/nw:node/tet:te/
    tet:tunnel-termination-point/tet:local-link-connectivities/
    tet:local-link-connectivity/tet:path-constraints/
    tet:te-bandwidth/tet:technology:
    +--:(flexi-grid)
       +--rw supported-bandwidth-list*   identityref
  augment /nw:networks/nw:network/nt:link/tet:te/
    tet:te-link-attributes/tet:interface-switching-capability/
    tet:max-lsp-bandwidth/tet:te-bandwidth/tet:technology:
    +--:(flexi-grid)
       +--rw bandwidth-type?   identityref
  augment /nw:networks/nw:network/nt:link/tet:te/
    tet:te-link-attributes/tet:max-link-bandwidth/tet:te-bandwidth/
    tet:technology:
    +--:(flexi-grid)
       +--rw supported-bandwidth-list*   identityref
  augment /nw:networks/nw:network/nt:link/tet:te/
    tet:te-link-attributes/tet:max-resv-link-bandwidth/
    tet:te-bandwidth/tet:technology:
    +--:(flexi-grid)
       +--rw supported-bandwidth-list*   identityref
  augment /nw:networks/nw:network/nt:link/tet:te/
    tet:te-link-attributes/tet:unreserved-bandwidth/
    tet:te-bandwidth/tet:technology:
    +--:(flexi-grid)
       +--rw supported-bandwidth-list*   identityref

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  augment /nw:networks/nw:network/nt:link/tet:te/
    tet:information-source-entry/tet:interface-switching-capability/
    tet:max-lsp-bandwidth/tet:te-bandwidth/tet:technology:
    +--:(flexi-grid)
       +--ro bandwidth-type?   identityref
  augment /nw:networks/nw:network/nt:link/tet:te/
    tet:information-source-entry/tet:max-link-bandwidth/
    tet:te-bandwidth/tet:technology:
    +--:(flexi-grid)
       +--ro supported-bandwidth-list*   identityref
  augment /nw:networks/nw:network/nt:link/tet:te/
    tet:information-source-entry/tet:max-resv-link-bandwidth/
    tet:te-bandwidth/tet:technology:
    +--:(flexi-grid)
       +--ro supported-bandwidth-list*   identityref
  augment /nw:networks/nw:network/nt:link/tet:te/
    tet:information-source-entry/tet:unreserved-bandwidth/
    tet:te-bandwidth/tet:technology:
    +--:(flexi-grid)
       +--ro supported-bandwidth-list*   identityref
  augment /nw:networks/tet:te/tet:templates/tet:link-template/
    tet:te-link-attributes/tet:interface-switching-capability/
    tet:max-lsp-bandwidth/tet:te-bandwidth/tet:technology:
    +--:(flexi-grid)
       +--rw bandwidth-type?   identityref
  augment /nw:networks/tet:te/tet:templates/tet:link-template/
    tet:te-link-attributes/tet:max-link-bandwidth/tet:te-bandwidth/
    tet:technology:
    +--:(flexi-grid)
       +--rw supported-bandwidth-list*   identityref
  augment /nw:networks/tet:te/tet:templates/tet:link-template/
    tet:te-link-attributes/tet:max-resv-link-bandwidth/
    tet:te-bandwidth/tet:technology:
    +--:(flexi-grid)
       +--rw supported-bandwidth-list*   identityref
  augment /nw:networks/tet:te/tet:templates/tet:link-template/
    tet:te-link-attributes/tet:unreserved-bandwidth/tet:te-bandwidth/
    tet:technology:
    +--:(flexi-grid)
       +--rw supported-bandwidth-list*   identityref
  augment /nw:networks/nw:network/nw:node/tet:te/
    tet:te-node-attributes/tet:connectivity-matrices/
    tet:label-restrictions/tet:label-restriction:
    +--rw grid-type?    identityref
    +--rw priority?     uint8
    +--rw flexi-grid
       +--rw nominal-central-frequency-granularity?   identityref
       +--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?   uint16
  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?   uint16
  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)
       +--rw flexi?   identityref
  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?              uint16
          |  +--rw flexi-m?              uint16
          +--:(super)
             +--rw subcarrier-flexi-n* [flexi-n]
                +--rw flexi-n    uint16
                +--rw flexi-m?   uint16
  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?              uint16
          |  +--rw flexi-m?              uint16
          +--:(super)
             +--rw subcarrier-flexi-n* [flexi-n]
                +--rw flexi-n    uint16
                +--rw flexi-m?   uint16

Lopez de Vergara, et al.   Expires  January 8, 2020       [Page 13]


Internet-Draft     A YANG data model for Flexi-Grid     July 2019

  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?              uint16
          |  +--rw flexi-m?              uint16
          +--:(super)
             +--rw subcarrier-flexi-n* [flexi-n]
                +--rw flexi-n    uint16
                +--rw flexi-m?   uint16
  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?              uint16
          |  +--rw flexi-m?              uint16
          +--:(super)
             +--rw subcarrier-flexi-n* [flexi-n]
                +--rw flexi-n    uint16
                +--rw flexi-m?   uint16
  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?              uint16
          |  +--ro flexi-m?              uint16
          +--:(super)
             +--ro subcarrier-flexi-n* [flexi-n]
                +--ro flexi-n    uint16
                +--ro flexi-m?   uint16

Lopez de Vergara, et al.   Expires  January 8, 2020       [Page 14]


Internet-Draft     A YANG data model for Flexi-Grid     July 2019

  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 grid-type?    identityref
    +--rw priority?     uint8
    +--rw flexi-grid
       +--rw nominal-central-frequency-granularity?   identityref
       +--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/tet:label-start/tet:te-label/tet:technology:
    +--:(flexi-grid)
       +--rw flexi-n?   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/tet:label-end/tet:te-label/tet:technology:
    +--:(flexi-grid)
       +--rw flexi-n?   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/tet:label-step/tet:technology:
    +--:(flexi-grid)
       +--rw flexi?   identityref
  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 grid-type?    identityref
    +--rw priority?     uint8
    +--rw flexi-grid
       +--rw nominal-central-frequency-granularity?   identityref
       +--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:to/tet:label-restrictions/
    tet:label-restriction/tet:label-start/tet:te-label/tet:technology:
    +--:(flexi-grid)
       +--rw flexi-n?   uint16

Lopez de Vergara, et al.   Expires  January 8, 2020       [Page 15]


Internet-Draft     A YANG data model for Flexi-Grid     July 2019

  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?   uint16
  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)
       +--rw flexi?   identityref
  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?              uint16
          |  +--rw flexi-m?              uint16
          +--:(super)
             +--rw subcarrier-flexi-n* [flexi-n]
                +--rw flexi-n    uint16
                +--rw flexi-m?   uint16
  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?              uint16
          |  +--rw flexi-m?              uint16
          +--:(super)
             +--rw subcarrier-flexi-n* [flexi-n]
                +--rw flexi-n    uint16
                +--rw flexi-m?   uint16

Lopez de Vergara, et al.   Expires  January 8, 2020       [Page 16]


Internet-Draft     A YANG data model for Flexi-Grid     July 2019

  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?              uint16
          |  +--rw flexi-m?              uint16
          +--:(super)
             +--rw subcarrier-flexi-n* [flexi-n]
                +--rw flexi-n    uint16
                +--rw flexi-m?   uint16
  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?              uint16
          |  +--rw flexi-m?              uint16
          +--:(super)
             +--rw subcarrier-flexi-n* [flexi-n]
                +--rw flexi-n    uint16
                +--rw flexi-m?   uint16
  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?              uint16
          |  +--ro flexi-m?              uint16
          +--:(super)
             +--ro subcarrier-flexi-n* [flexi-n]
                +--ro flexi-n    uint16
                +--ro flexi-m?   uint16

Lopez de Vergara, et al.   Expires  January 8, 2020       [Page 17]


Internet-Draft     A YANG data model for Flexi-Grid     July 2019

  augment /nw:networks/nw:network/nw:node/tet:te/
    tet:information-source-entry/tet:connectivity-matrices/
    tet:label-restrictions/tet:label-restriction:
    +--ro grid-type?    identityref
    +--ro priority?     uint8
    +--ro flexi-grid
       +--ro nominal-central-frequency-granularity?   identityref
       +--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:label-restrictions/tet:label-restriction/tet:label-start/
    tet:te-label/tet:technology:
    +--:(flexi-grid)
       +--ro flexi-n?   uint16
  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?   uint16
  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)
       +--ro flexi?   identityref
  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?              uint16
          |  +--ro flexi-m?              uint16
          +--:(super)
             +--ro subcarrier-flexi-n* [flexi-n]
                +--ro flexi-n    uint16
                +--ro flexi-m?   uint16

Lopez de Vergara, et al.   Expires  January 8, 2020       [Page 18]


Internet-Draft     A YANG data model for Flexi-Grid     July 2019

  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?              uint16
          |  +--ro flexi-m?              uint16
          +--:(super)
             +--ro subcarrier-flexi-n* [flexi-n]
                +--ro flexi-n    uint16
                +--ro flexi-m?   uint16
  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?              uint16
          |  +--ro flexi-m?              uint16
          +--:(super)
             +--ro subcarrier-flexi-n* [flexi-n]
                +--ro flexi-n    uint16
                +--ro flexi-m?   uint16
  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?              uint16
          |  +--ro flexi-m?              uint16
          +--:(super)
             +--ro subcarrier-flexi-n* [flexi-n]
                +--ro flexi-n    uint16
                +--ro flexi-m?   uint16

Lopez de Vergara, et al.   Expires  January 8, 2020       [Page 19]


Internet-Draft     A YANG data model for Flexi-Grid     July 2019

  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?              uint16
          |  +--ro flexi-m?              uint16
          +--:(super)
             +--ro subcarrier-flexi-n* [flexi-n]
                +--ro flexi-n    uint16
                +--ro flexi-m?   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 grid-type?    identityref
    +--ro priority?     uint8
    +--ro flexi-grid
       +--ro nominal-central-frequency-granularity?   identityref
       +--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/tet:label-start/tet:te-label/tet:technology:
    +--:(flexi-grid)
       +--ro flexi-n?   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/tet:label-end/tet:te-label/tet:technology:
    +--:(flexi-grid)
       +--ro flexi-n?   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/tet:label-step/tet:technology:
    +--:(flexi-grid)
       +--ro flexi?   identityref

Lopez de Vergara, et al.   Expires  January 8, 2020       [Page 20]


Internet-Draft     A YANG data model for Flexi-Grid     July 2019

  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 grid-type?    identityref
    +--ro priority?     uint8
    +--ro flexi-grid
       +--ro nominal-central-frequency-granularity?   identityref
       +--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/tet:label-start/tet:te-label/tet:technology:
    +--:(flexi-grid)
       +--ro flexi-n?   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/tet:label-end/tet:te-label/tet:technology:
    +--:(flexi-grid)
       +--ro flexi-n?   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/tet:label-step/tet:technology:
    +--:(flexi-grid)
       +--ro flexi?   identityref
  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?              uint16
          |  +--ro flexi-m?              uint16
          +--:(super)
             +--ro subcarrier-flexi-n* [flexi-n]
                +--ro flexi-n    uint16
                +--ro flexi-m?   uint16

Lopez de Vergara, et al.   Expires  January 8, 2020       [Page 21]


Internet-Draft     A YANG data model for Flexi-Grid     July 2019

  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?              uint16
          |  +--ro flexi-m?              uint16
          +--:(super)
             +--ro subcarrier-flexi-n* [flexi-n]
                +--ro flexi-n    uint16
                +--ro flexi-m?   uint16
  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?              uint16
          |  +--ro flexi-m?              uint16
          +--:(super)
             +--ro subcarrier-flexi-n* [flexi-n]
                +--ro flexi-n    uint16
                +--ro flexi-m?   uint16
  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?              uint16
          |  +--ro flexi-m?              uint16
          +--:(super)
             +--ro subcarrier-flexi-n* [flexi-n]
                +--ro flexi-n    uint16
                +--ro flexi-m?   uint16

Lopez de Vergara, et al.   Expires  January 8, 2020       [Page 22]


Internet-Draft     A YANG data model for Flexi-Grid     July 2019

  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?              uint16
          |  +--ro flexi-m?              uint16
          +--:(super)
             +--ro subcarrier-flexi-n* [flexi-n]
                +--ro flexi-n    uint16
                +--ro flexi-m?   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 grid-type?    identityref
    +--rw priority?     uint8
    +--rw flexi-grid
       +--rw nominal-central-frequency-granularity?   identityref
       +--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:label-restrictions/tet:label-restriction/tet:label-start/
    tet:te-label/tet:technology:
    +--:(flexi-grid)
       +--rw flexi-n?   uint16
  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:
    +--:(flexi-grid)
       +--rw flexi-n?   uint16
  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)
       +--rw flexi?   identityref

Lopez de Vergara, et al.   Expires  January 8, 2020       [Page 23]


Internet-Draft     A YANG data model for Flexi-Grid     July 2019

  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?              uint16
          |  +--rw flexi-m?              uint16
          +--:(super)
             +--rw subcarrier-flexi-n* [flexi-n]
                +--rw flexi-n    uint16
                +--rw flexi-m?   uint16
  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?              uint16
          |  +--rw flexi-m?              uint16
          +--:(super)
             +--rw subcarrier-flexi-n* [flexi-n]
                +--rw flexi-n    uint16
                +--rw flexi-m?   uint16
  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?              uint16
          |  +--rw flexi-m?              uint16
          +--:(super)
             +--rw subcarrier-flexi-n* [flexi-n]
                +--rw flexi-n    uint16
                +--rw flexi-m?   uint16

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  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?              uint16
          |  +--rw flexi-m?              uint16
          +--:(super)
             +--rw subcarrier-flexi-n* [flexi-n]
                +--rw flexi-n    uint16
                +--rw flexi-m?   uint16
  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:
    +--:(flexi-grid)
       +--ro (single-or-super-channel)?
          +--:(single)
          |  +--ro flexi-n?              uint16
          |  +--ro flexi-m?              uint16
          +--:(super)
             +--ro subcarrier-flexi-n* [flexi-n]
                +--ro flexi-n    uint16
                +--ro flexi-m?   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 grid-type?    identityref
    +--rw priority?     uint8
    +--rw flexi-grid
       +--rw nominal-central-frequency-granularity?   identityref
       +--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/tet:label-start/tet:te-label/tet:technology:
    +--:(flexi-grid)
       +--rw flexi-n?   uint16

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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:label-restrictions/
    tet:label-restriction/tet:label-end/tet:te-label/tet:technology:
    +--:(flexi-grid)
       +--rw flexi-n?   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/tet:label-step/tet:technology:
    +--:(flexi-grid)
       +--rw flexi?   identityref
  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:
    +--:(flexi-grid)
       +--rw (single-or-super-channel)?
          +--:(single)
          |  +--rw flexi-n?              uint16
          |  +--rw flexi-m?              uint16
          +--:(super)
             +--rw subcarrier-flexi-n* [flexi-n]
                +--rw flexi-n    uint16
                +--rw flexi-m?   uint16
  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?              uint16
          |  +--rw flexi-m?              uint16
          +--:(super)
             +--rw subcarrier-flexi-n* [flexi-n]
                +--rw flexi-n    uint16
                +--rw flexi-m?   uint16

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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: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?              uint16
          |  +--rw flexi-m?              uint16
          +--:(super)
             +--rw subcarrier-flexi-n* [flexi-n]
                +--rw flexi-n    uint16
                +--rw flexi-m?   uint16
  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?              uint16
          |  +--rw flexi-m?              uint16
          +--:(super)
             +--rw subcarrier-flexi-n* [flexi-n]
                +--rw flexi-n    uint16
                +--rw flexi-m?   uint16
  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?              uint16
          |  +--ro flexi-m?              uint16
          +--:(super)
             +--ro subcarrier-flexi-n* [flexi-n]
                +--ro flexi-n    uint16
                +--ro flexi-m?   uint16

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  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?              uint16
          |  +--rw flexi-m?              uint16
          +--:(super)
             +--rw subcarrier-flexi-n* [flexi-n]
                +--rw flexi-n    uint16
                +--rw flexi-m?   uint16
  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?              uint16
          |  +--rw flexi-m?              uint16
          +--:(super)
             +--rw subcarrier-flexi-n* [flexi-n]
                +--rw flexi-n    uint16
                +--rw flexi-m?   uint16
  augment /nw:networks/nw:network/nt:link/tet:te/
    tet:te-link-attributes/tet:label-restrictions/
    tet:label-restriction:
    +--rw grid-type?    identityref
    +--rw priority?     uint8
    +--rw flexi-grid
       +--rw nominal-central-frequency-granularity?   identityref
       +--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/tet:label-start/tet:te-label/tet:technology:
    +--:(flexi-grid)
       +--rw flexi-n?   uint16
  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:
    +--:(flexi-grid)
       +--rw flexi-n?   uint16

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  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)
       +--rw flexi?   identityref
  augment /nw:networks/nw:network/nt:link/tet:te/
    tet:information-source-entry/tet:label-restrictions/
    tet:label-restriction:
    +--ro grid-type?    identityref
    +--ro priority?     uint8
    +--ro flexi-grid
       +--ro nominal-central-frequency-granularity?   identityref
       +--ro slot-width-granularity?                  identityref
       +--ro min-slot-width-factor?                   uint16
       +--ro max-slot-width-factor?                   uint16
  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?   uint16
  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?   uint16
  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)
       +--ro flexi?   identityref
  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?              uint16
          |  +--rw flexi-m?              uint16
          +--:(super)
             +--rw subcarrier-flexi-n* [flexi-n]
                +--rw flexi-n    uint16
                +--rw flexi-m?   uint16

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  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:
    +--:(flexi-grid)
       +--rw (single-or-super-channel)?
          +--:(single)
          |  +--rw flexi-n?              uint16
          |  +--rw flexi-m?              uint16
          +--:(super)
             +--rw subcarrier-flexi-n* [flexi-n]
                +--rw flexi-n    uint16
                +--rw flexi-m?   uint16
  augment /nw:networks/tet:te/tet:templates/tet:link-template/
    tet:te-link-attributes/tet:label-restrictions/
    tet:label-restriction:
    +--rw grid-type?    identityref
    +--rw priority?     uint8
    +--rw flexi-grid
       +--rw nominal-central-frequency-granularity?   identityref
       +--rw slot-width-granularity?                  identityref
       +--rw min-slot-width-factor?                   uint16
       +--rw 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/tet:label-start/tet:te-label/tet:technology:
    +--:(flexi-grid)
       +--rw flexi-n?   uint16
  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?   uint16
  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)
       +--rw flexi?   identityref


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6.2. YANG Model - Code

   <CODE BEGINS> file "ietf-flexi-grid-topology@2019-07-07.yang"
module ietf-flexi-grid-topology {

  yang-version 1.1;

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

  prefix "flexi-grid";

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

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

  import ietf-te-topology {
    prefix "tet";
    reference
      "RFC YYYY: YANG Data Model for
       Traffic Engineering (TE) Topologies";
  }

  /* Note: The RFC Editor will replace YYYY with the number assigned
     to the RFC once draft-ietf-teas-yang-te-topo becomes an RFC.*/

  import ietf-layer0-types {
    prefix "layer0-types";
    reference
      "RFC XXXX: A YANG Data Model for WSON
       (Wavelength Switched Optical Networks)";
  }

  /* Note: The RFC Editor will replace XXXX with the number assigned
     to the RFC once draft-ietf-ccamp-wson-yang becomes an RFC.*/

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  organization
    "IETF CCAMP Working Group";

  contact
    "WG Web:   <http://tools.ietf.org/wg/ccamp/>
     WG List:  <mailto:ccamp@ietf.org>

     WG Chair: Daniele Ceccarelli
               <mailto:daniele.ceccarelli@ericsson.com>

     WG Chair: Fatai Zhang
               <mailto:zhangfatai@huawei.com>

     Editor: Jorge E. Lopez de Vergara  <jorge.lopez_vergara@uam.es>
     Editor: Daniel Perdices <daniel.perdices@naudit.es>
     Editor: Victor Lopez <victor.lopezalvarez@telefonica.com>
     Editor: Daniel King <d.king@lancaster.ac.uk>
     Editor: Young Lee <leeyoung@huawei.com>";
     description
       "This module defines a model for flexi-grid topology

     Copyright (c) 2019 IETF Trust and the persons identified
     as authors of the code.  All rights reserved.

     Redistribution and use in source and binary forms, with
     or without modification, is permitted pursuant to, and
     subject to the license terms contained in, the Simplified BSD
     License set forth in Section 4.c of the IETF Trust's Legal
     Provisions Relating to IETF Documents
     (http://trustee.ietf.org/license-info).";

  revision 2019-07-07 {
    description
      "version 2.";

    reference
      "RFC XXXX: A Yang Data Model for flexi-grid Optical Networks ";
  }

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  /*
   * Groupings
   */
  grouping flexi-grid-node-attributes {
    description "flexi-grid node attributes.";

    container flexi-grid-node {
      description "flexi-grid node attrtibutes.";
      leaf node-type {
        type identityref {
          base layer0-types:layer0-node-type;
        }
        description "flexi-grid node type.";
      }
    }
  }

  grouping flexi-grid-link-attributes {
    description
     "Future flexi-grid link attributes extensions";
  }
  grouping flexi-grid-tp-attributes {
    description "flexi-grid-tp-attributes";

    list supported-payload-types {
      key "index";
      description
        "Supported payload types of a TP. The payload type is defined
         as the generalized PIDs in GMPLS.";
      leaf index {
        type uint16;
        description "payload type index";
      }
      leaf payload-type {
        type string;
        description "the payload type supported by this client tp";
        reference
          "http://www.iana.org/assignments/gmpls-sig-parameters
           /gmpls-sig-parameters.xhtml";
      }
    }
    leaf client-facing {
      type boolean;
      default 'false';
      description
        "Indicating if it is a client-facing TP.";
    }
  }

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  grouping flexi-grid-ttp-attributes {
    description
     "flexi-grid tunnel termination point (e.g.tranponder)
       attributes";
    leaf-list supported-operational-modes {
      type layer0-types:operational-mode;
      description
        "List of all supported vendor-specific
         mode identifiers";
    }
    leaf configured-operational-modes {
      type layer0-types:operational-mode;
      description
       "Vendor-specific mode identifier configured
         on the TTP.";
    }

    leaf-list supported-fec-types {
      type identityref {
        base layer0-types:fec-type;
      }
       description
        "List of all supported FEC types by this TTP.";
    }

    leaf-list supported-termination-types {
      type identityref {
        base layer0-types:term-type;
      }
        description
         "List of all supported termination types by this TTP.";
    }

    leaf supports-bit-stuffing {
       type boolean;
       description
         "Indicate whether bit stuffing is supported by this TTP.";
    }

    leaf is-tunable {
      type boolean;
      description
        "Indicates if the TTP, or transponder, is tunable. Tunable
         transponders are assumed to be fully tunable to any of the
         96 channels within DWDM C-band.";
    }

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    leaf max-subcarrier-channel-num {
      type uint8 {
     range "1..max";
      }
      default 1;
      description
        "Indicate the maximum number of subcarrier channels for
          super-channel transponders. When the value equals 1 it
          represents regular single-channel transponder.";
    }
    leaf supports-flexi-grid {
      type boolean;
      description
        "Indicates if the TTP, or transponder, supports flex grid.";
    }
  }

  /*
   * Data nodes
   */

  augment "/nw:networks/nw:network/nw:network-types"
   + "/tet:te-topology" {
      description "flexi-grid-topology augmented";
      container flexi-grid-topology {
        presence "indicates a topology of Flex Grid";
        description
          "Container to identify flexi-grid topology type";
      }
  }

  augment "/nw:networks/nw:network/nt:link/tet:te"
        + "/tet:te-link-attributes"   {
    when "/nw:networks/nw:network/nw:network-types"
        +"/tet:te-topology/flexi-grid:flexi-grid-topology" {
       description "This augment is only valid for flexi-grid.";
    }
    description "flexi-grid Link augmentation.";
    uses flexi-grid-link-attributes;
  }

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  augment "/nw:networks/nw:network/nw:node/nt:termination-point/"
        + "tet:te" {
    when "/nw:networks/nw:network/nw:network-types"
        +"/tet:te-topology/flexi-grid:flexi-grid-topology" {
       description "This augment is only valid for flexi-grid.";
    }
    description "flexi-grid TP attributes.";
    uses flexi-grid-tp-attributes;
  }

  augment "/nw:networks/nw:network/nw:node/tet:te"
        + "/tet:te-node-attributes" {
    when "/nw:networks/nw:network/nw:network-types"
       +"/tet:te-topology/flexi-grid:flexi-grid-topology" {
       description "This augment is only valid for flexi-grid.";
    }
    description "flexi-grid Node augmentation.";
    uses flexi-grid-node-attributes;
  }
  augment "/nw:networks/nw:network/nw:node/tet:te"
        + "/tet:tunnel-termination-point" {
    when "/nw:networks/nw:network/nw:network-types"
       +"/tet:te-topology/flexi-grid:flexi-grid-topology" {
      description "This augment is only valid for flexi-grid.";
    }
    description "flexi-grid tunnel termination point augmentation.";
    uses flexi-grid-ttp-attributes;
  }

  /*
   * Augment TE bandwidth
   */

  /* Augment maximum LSP bandwidth of link terminationpoint (LTP) */
  augment "/nw:networks/nw:network/nw:node/nt:termination-point/"
        + "tet:te/"
        + "tet:interface-switching-capability/tet:max-lsp-bandwidth/"
        + "tet:te-bandwidth/tet:technology" {
    when "../../../../../../nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE bandwidth";
    }
    description "flexi-grid bandwidth.";
    case flexi-grid {
      uses layer0-types:flexi-grid-path-bandwidth;
    }
  }

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  /* Augment bandwidth path constraints of connectivity-matrices */
  augment "/nw:networks/nw:network/nw:node/tet:te/"
        + "tet:te-node-attributes/tet:connectivity-matrices/"
        + "tet:path-constraints/tet:te-bandwidth/tet:technology" {
    when "../../../../../../nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE bandwidth";
    }
    description "flexi-grid bandwidth.";
    case flexi-grid {
      uses layer0-types:flexi-grid-link-bandwidth;
    }
  }
  /* Augment bandwidth path constraints of connectivity-matrix */
  augment "/nw:networks/nw:network/nw:node/tet:te/"
        + "tet:te-node-attributes/tet:connectivity-matrices/"
        + "tet:connectivity-matrix/"
        + "tet:path-constraints/tet:te-bandwidth/tet:technology" {
    when "../../../../../../../nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE bandwidth";
    }
    description "flexi-grid bandwidth.";
    case flexi-grid {
      uses layer0-types:flexi-grid-link-bandwidth;
    }
  }

  /* Augment bandwidth path constraints of connectivity-matrices
     information-source */
  augment "/nw:networks/nw:network/nw:node/tet:te/"
        + "tet:information-source-entry/tet:connectivity-matrices/"
        + "tet:path-constraints/tet:te-bandwidth/tet:technology" {
    when "../../../../../../nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE bandwidth";
    }
    description "flexi-grid bandwidth.";
    case flexi-grid {
      uses layer0-types:flexi-grid-link-bandwidth;
    }
  }

Lopez de Vergara, et al.   Expires  January 8, 2020       [Page 37]


Internet-Draft     A YANG data model for Flexi-Grid     July 2019


  /* Augment bandwidth path constraints of connectivity-matrix
     information-source */
  augment "/nw:networks/nw:network/nw:node/tet:te/"
        + "tet:information-source-entry/tet:connectivity-matrices/"
        + "tet:connectivity-matrix/"
        + "tet:path-constraints/tet:te-bandwidth/tet:technology" {
    when "../../../../../../../nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE bandwidth";
    }
    description "flexi-grid bandwidth.";
    case flexi-grid {
      uses layer0-types:flexi-grid-link-bandwidth;
    }
  }
  /* Augment client bandwidth of tunnel termination point (TTP) */
  augment "/nw:networks/nw:network/nw:node/tet:te/"
        + "tet:tunnel-termination-point/"
        + "tet:client-layer-adaptation/tet:switching-capability/"
        + "tet:te-bandwidth/tet:technology" {
    when "../../../../../../nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE bandwidth";
    }
    description "flexi-grid bandwidth.";
    case flexi-grid {
      uses layer0-types:flexi-grid-link-bandwidth;
    }
  }


  /* Augment bandwidth path constraints of local-link-connectivities */
  augment "/nw:networks/nw:network/nw:node/tet:te/"
        + "tet:tunnel-termination-point/"
        + "tet:local-link-connectivities/tet:path-constraints/"
        + "tet:te-bandwidth/tet:technology" {
    when "../../../../../../nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE bandwidth";
    }
    description "flexi-grid bandwidth.";
    case flexi-grid {
      uses layer0-types:flexi-grid-link-bandwidth;
    }
  }

Lopez de Vergara, et al.   Expires  January 8, 2020       [Page 38]


Internet-Draft     A YANG data model for Flexi-Grid     July 2019


  /* Augment bandwidth path constraints of local-link-connectivity
     (LLC) */
  augment "/nw:networks/nw:network/nw:node/tet:te/"
        + "tet:tunnel-termination-point/"
        + "tet:local-link-connectivities/"
        + "tet:local-link-connectivity/tet:path-constraints/"
        + "tet:te-bandwidth/tet:technology" {
    when "../../../../../../../nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE bandwidth";
    }
    description "flexi-grid bandwidth.";
    case flexi-grid {
      uses layer0-types:flexi-grid-link-bandwidth;
    }
  }
  /* Augment maximum LSP bandwidth of TE link */
  augment "/nw:networks/nw:network/nt:link/tet:te/"
        + "tet:te-link-attributes/"
        + "tet:interface-switching-capability/tet:max-lsp-bandwidth/"
        + "tet:te-bandwidth/tet:technology" {
    when "../../../../../../nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "flexi-grid TE bandwidth.";
    }
    description "flexi-grid bandwidth.";
    case flexi-grid {
      uses layer0-types:flexi-grid-path-bandwidth;
    }
  }


  /* Augment maximum bandwidth of TE link */
  augment "/nw:networks/nw:network/nt:link/tet:te/"
        + "tet:te-link-attributes/"
        + "tet:max-link-bandwidth/"
        + "tet:te-bandwidth/tet:technology" {
    when "../../../../../nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "flexi-grid TE bandwidth.";
    }
    description "flexi-grid bandwidth.";
    case flexi-grid {
      uses layer0-types:flexi-grid-link-bandwidth;
    }
  }

Lopez de Vergara, et al.   Expires  January 8, 2020       [Page 39]


Internet-Draft     A YANG data model for Flexi-Grid     July 2019


  /* Augment maximum reservable bandwidth of TE link */
  augment "/nw:networks/nw:network/nt:link/tet:te/"
        + "tet:te-link-attributes/"
        + "tet:max-resv-link-bandwidth/"
        + "tet:te-bandwidth/tet:technology" {
    when "../../../../../nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "flexi-grid TE bandwidth.";
    }
    description "flexi-grid bandwidth.";
    case flexi-grid {
      uses layer0-types:flexi-grid-link-bandwidth;
    }
  }
  /* Augment unreserved bandwidth of TE Link */
  augment "/nw:networks/nw:network/nt:link/tet:te/"
        + "tet:te-link-attributes/"
        + "tet:unreserved-bandwidth/"
        + "tet:te-bandwidth/tet:technology" {
    when "../../../../../nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "flexi-grid TE bandwidth.";
    }
    description "flexi-grid bandwidth.";
    case flexi-grid {
      uses layer0-types:flexi-grid-link-bandwidth;
    }
  }


  /* Augment maximum LSP bandwidth of TE link information-source */
  augment "/nw:networks/nw:network/nt:link/tet:te/"
        + "tet:information-source-entry/"
        + "tet:interface-switching-capability/"
        + "tet:max-lsp-bandwidth/"
        + "tet:te-bandwidth/tet:technology" {
    when "../../../../../../nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "flexi-grid TE bandwidth.";
    }
    description "flexi-grid bandwidth.";
    case flexi-grid {
      uses layer0-types:flexi-grid-path-bandwidth;
    }
  }

Lopez de Vergara, et al.   Expires  January 8, 2020       [Page 40]


Internet-Draft     A YANG data model for Flexi-Grid     July 2019


  /* Augment maximum bandwidth of TE link information-source */
  augment "/nw:networks/nw:network/nt:link/tet:te/"
        + "tet:information-source-entry/"
        + "tet:max-link-bandwidth/"
        + "tet:te-bandwidth/tet:technology" {
    when "../../../../../nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "flexi-grid TE bandwidth.";
    }
    description "flexi-grid bandwidth.";
    case flexi-grid {
      uses layer0-types:flexi-grid-link-bandwidth;
    }
  }
  /* Augment maximum reservable bandwidth of TE link information-source
   */
  augment "/nw:networks/nw:network/nt:link/tet:te/"
        + "tet:information-source-entry/"
        + "tet:max-resv-link-bandwidth/"
        + "tet:te-bandwidth/tet:technology" {
    when "../../../../../nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "flexi-grid TE bandwidth.";
    }
    description "flexi-grid bandwidth.";
    case flexi-grid {
      uses layer0-types:flexi-grid-link-bandwidth;
    }
  }


  /* Augment unreserved bandwidth of TE link information-source */
  augment "/nw:networks/nw:network/nt:link/tet:te/"
        + "tet:information-source-entry/"
        + "tet:unreserved-bandwidth/"
        + "tet:te-bandwidth/tet:technology" {
    when "../../../../../nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "flexi-grid TE bandwidth.";
    }
    description "flexi-grid bandwidth.";
    case flexi-grid {
      uses layer0-types:flexi-grid-link-bandwidth;
    }
  }

Lopez de Vergara, et al.   Expires  January 8, 2020       [Page 41]


Internet-Draft     A YANG data model for Flexi-Grid     July 2019


  /* Augment maximum LSP bandwidth of TE link template */
  augment "/nw:networks/tet:te/tet:templates/"
        + "tet:link-template/tet:te-link-attributes/"
        + "tet:interface-switching-capability/"
        + "tet:max-lsp-bandwidth/"
        + "tet:te-bandwidth/tet:technology" {
/*
    when "../../../../../../nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "flexi-grid TE bandwidth.";
    }
*/
    description "flexi-grid bandwidth.";
    case flexi-grid {
      uses layer0-types:flexi-grid-path-bandwidth;
    }
  }
  /* Augment maximum bandwidth of TE link template */
  augment "/nw:networks/tet:te/tet:templates/"
        + "tet:link-template/tet:te-link-attributes/"
        + "tet:max-link-bandwidth/"
        + "tet:te-bandwidth/tet:technology" {
/*
    when "../../../../../nw:network-types/tet:te-topology/"
        + "flexi-grid:flexi-grid-topology" {
      description "flexi-grid TE bandwidth.";
    }
*/
    description "flexi-grid bandwidth.";
    case flexi-grid {
      uses layer0-types:flexi-grid-link-bandwidth;
    }
  }


Lopez de Vergara, et al.   Expires  January 8, 2020       [Page 42]


Internet-Draft     A YANG data model for Flexi-Grid     July 2019

  /* Augment maximum reservable bandwidth of TE link template */
  augment "/nw:networks/tet:te/tet:templates/"
        + "tet:link-template/tet:te-link-attributes/"
        + "tet:max-resv-link-bandwidth/"
        + "tet:te-bandwidth/tet:technology" {
/*
    when "../../../../../nw:network-types/tet:te-topology/"
        + "flexi-grid:flexi-grid-topology" {
      description "flexi-grid TE bandwidth.";
    }
*/
    description "flexi-grid bandwidth.";
    case flexi-grid {
      uses layer0-types:flexi-grid-link-bandwidth;
    }
  }

  /* Augment unreserved bandwidth of TE link template */
  augment "/nw:networks/tet:te/tet:templates/"
        + "tet:link-template/tet:te-link-attributes/"
        + "tet:unreserved-bandwidth/"
        + "tet:te-bandwidth/tet:technology" {
/*
    when "../../../../../../nw:network-types/tet:te-topology/"
        + "flexi-grid:flexi-grid-topology" {
      description "flexi-grid TE bandwidth.";
    }
*/
    description "flexi-grid bandwidth.";
    case flexi-grid {
      uses layer0-types:flexi-grid-link-bandwidth;
    }
  }

  /*
   * Augment TE label.
   */

  /* Augment label restrictions of connectivity-matrices */
  augment "/nw:networks/nw:network/nw:node/tet:te/"
        + "tet:te-node-attributes/tet:connectivity-matrices/"
        + "tet:label-restrictions/tet:label-restriction" {
    when "../../../../../../nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    uses layer0-types:flexi-grid-label-restriction;
  }


Lopez de Vergara, et al.   Expires  January 8, 2020       [Page 43]


Internet-Draft     A YANG data model for Flexi-Grid     July 2019


  /* Augment label restrictions start of connectivity-matrices */
  augment "/nw:networks/nw:network/nw:node/tet:te/"
        + "tet:te-node-attributes/tet:connectivity-matrices/"
        + "tet:label-restrictions/tet:label-restriction/"
        + "tet:label-start/"
        + "tet:te-label/tet:technology" {
    when "../../../../../../../../nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    case flexi-grid {
      uses layer0-types:flexi-grid-link-label;
    }
  }
  /* Augment label restrictions end of connectivity-matrices */
  augment "/nw:networks/nw:network/nw:node/tet:te/"
        + "tet:te-node-attributes/tet:connectivity-matrices/"
        + "tet:label-restrictions/"
        + "tet:label-restriction/tet:label-end/"
        + "tet:te-label/tet:technology" {
    when "../../../../../../../../"
       + "nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    case flexi-grid {
      uses layer0-types:flexi-grid-link-label;
    }
  }

  /* Augment label restrictions step of connectivity-matrices */
  augment "/nw:networks/nw:network/nw:node/tet:te/"
        + "tet:te-node-attributes/tet:connectivity-matrices/"
        + "tet:label-restrictions/"
        + "tet:label-restriction/tet:label-step/"
        + "tet:technology" {
    when "../../../../../../../"
       + "nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label step.";
    case flexi-grid {
      uses layer0-types:flexi-grid-label-step;
    }
  }

Lopez de Vergara, et al.   Expires  January 8, 2020       [Page 44]


Internet-Draft     A YANG data model for Flexi-Grid     July 2019

  /* Augment label hop of underlay primary path of connectivity-matrices
   */
  augment "/nw:networks/nw:network/nw:node/tet:te/"
        + "tet:te-node-attributes/tet:connectivity-matrices/"
        + "tet:underlay/tet:primary-path/tet:path-element/"
        + "tet:type/tet:label/tet:label-hop/"
        + "tet:te-label/tet:technology" {
    when "../../../../../../../../../"
       + "nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    case flexi-grid {
      uses layer0-types:flexi-grid-path-label;
    }
  }
  /* Augment label hop of underlay backup path of connectivity-matrices
   */
  augment "/nw:networks/nw:network/nw:node/tet:te/"
        + "tet:te-node-attributes/tet:connectivity-matrices/"
        + "tet:underlay/tet:backup-path/tet:path-element/"
        + "tet:type/tet:label/tet:label-hop/"
        + "tet:te-label/tet:technology" {
    when "../../../../../../../../../"
       + "nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    case flexi-grid {
      uses layer0-types:flexi-grid-path-label;
    }
  }
  /* Augment label hop of route-exclude of connectivity-matrices */
  augment "/nw:networks/nw:network/nw:node/tet:te/"
        + "tet:te-node-attributes/tet:connectivity-matrices/"
        + "tet:optimizations/tet:algorithm/tet:metric/"
        + "tet:optimization-metric/"
        + "tet:explicit-route-exclude-objects/"
        + "tet:route-object-exclude-object/"
        + "tet:type/tet:label/tet:label-hop/"
        + "tet:te-label/tet:technology" {
    when "../../../../../../../../../../"
       + "nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    case flexi-grid {
      uses layer0-types:flexi-grid-path-label;
    }
  }


Lopez de Vergara, et al.   Expires  January 8, 2020       [Page 45]


Internet-Draft     A YANG data model for Flexi-Grid     July 2019


  /* Augment label hop of route-include of connectivity-matrices (added)
   */
  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/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    case flexi-grid {
      uses layer0-types:flexi-grid-path-label;
    }
  }
  /* Augment label hop of path-route of connectivity-matrices */
  augment "/nw:networks/nw:network/nw:node/tet:te/"
        + "tet:te-node-attributes/tet:connectivity-matrices/"
        + "tet:path-properties/tet:path-route-objects/"
        + "tet:path-route-object/tet:type/tet:label/tet:label-hop/"
        + "tet:te-label/tet:technology"{
    when "../../../../../../../../../"
       + "nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    case flexi-grid {
      uses layer0-types:flexi-grid-path-label;
    }
  }

  /* Augment ingress label restrictions of connectivity-matrix */
  augment "/nw:networks/nw:network/nw:node/tet:te/"
        + "tet:te-node-attributes/tet:connectivity-matrices/"
        + "tet:connectivity-matrix/tet:from/"
        + "tet:label-restrictions/tet:label-restriction" {
    when "../../../../../../../../"
       + "nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    uses layer0-types:flexi-grid-label-restriction;
  }

Lopez de Vergara, et al.   Expires  January 8, 2020       [Page 46]


Internet-Draft     A YANG data model for Flexi-Grid     July 2019

  /* Augment ingress label restrictions start of connectivity-matrix */
  augment "/nw:networks/nw:network/nw:node/tet:te/"
        + "tet:te-node-attributes/tet:connectivity-matrices/"
        + "tet:connectivity-matrix/tet:from/"
        + "tet:label-restrictions/tet:label-restriction/"
        + "tet:label-start/"
        + "tet:te-label/tet:technology" {
    when "../../../../../../../../../../"
       + "nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    case flexi-grid {
      uses layer0-types:flexi-grid-link-label;
    }
  }
  /* Augment ingress label restrictions end of connectivity-matrix */
  augment "/nw:networks/nw:network/nw:node/tet:te/"
        + "tet:te-node-attributes/tet:connectivity-matrices/"
        + "tet:connectivity-matrix/tet:from/"
        + "tet:label-restrictions/tet:label-restriction/"
        + "tet:label-end/"
        + "tet:te-label/tet:technology" {
    when "../../../../../../../../../../"
       + "nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    case flexi-grid {
      uses layer0-types:flexi-grid-link-label;
    }
  }
  /* Augment ingress label restrictions step of connectivity-matrix */
  augment "/nw:networks/nw:network/nw:node/tet:te/"
        + "tet:te-node-attributes/tet:connectivity-matrices/"
        + "tet:connectivity-matrix/tet:from/"
        + "tet:label-restrictions/tet:label-restriction/"
        + "tet:label-step/"
        + "tet:technology" {
    when "../../../../../../../../../"
       + "nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    case flexi-grid {
      uses layer0-types:flexi-grid-label-step;
    }
  }

Lopez de Vergara, et al.   Expires  January 8, 2020       [Page 47]


Internet-Draft     A YANG data model for Flexi-Grid     July 2019

  /* Augment egress label restrictions of connectivity-matrix */
  augment "/nw:networks/nw:network/nw:node/tet:te/"
        + "tet:te-node-attributes/tet:connectivity-matrices/"
        + "tet:connectivity-matrix/tet:to/"
        + "tet:label-restrictions/tet:label-restriction" {
    when "../../../../../../../../"
       + "nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    uses layer0-types:flexi-grid-label-restriction;
  }

  /* Augment egress label restrictions start of connectivity-matrix */
  augment "/nw:networks/nw:network/nw:node/tet:te/"
        + "tet:te-node-attributes/tet:connectivity-matrices/"
        + "tet:connectivity-matrix/tet:to/"
        + "tet:label-restrictions/tet:label-restriction/"
        + "tet:label-start/"
        + "tet:te-label/tet:technology" {
    when "../../../../../../../../../../"
       + "nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    case flexi-grid {
      uses layer0-types:flexi-grid-link-label;
    }
  }
  /* Augment egress label restrictions end of connectivity-matrix */
  augment "/nw:networks/nw:network/nw:node/tet:te/"
        + "tet:te-node-attributes/tet:connectivity-matrices/"
        + "tet:connectivity-matrix/tet:to/"
        + "tet:label-restrictions/tet:label-restriction/"
        + "tet:label-end/"
        + "tet:te-label/tet:technology" {
    when "../../../../../../../../../../"
       + "nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    case flexi-grid {
      uses layer0-types:flexi-grid-link-label;
    }
  }

Lopez de Vergara, et al.   Expires  January 8, 2020       [Page 48]


Internet-Draft     A YANG data model for Flexi-Grid     July 2019

  /* Augment egress label restrictions step of connectivity-matrix */
  augment "/nw:networks/nw:network/nw:node/tet:te/"
        + "tet:te-node-attributes/tet:connectivity-matrices/"
        + "tet:connectivity-matrix/tet:to/"
        + "tet:label-restrictions/tet:label-restriction/"
        + "tet:label-step/"
        + "tet:technology" {
    when "../../../../../../../../../"
       + "nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    case flexi-grid {
      uses layer0-types:flexi-grid-label-step;
    }
  }
  /* Augment label hop of underlay primary path of connectivity-matrix
   */
  augment "/nw:networks/nw:network/nw:node/tet:te/"
        + "tet:te-node-attributes/tet:connectivity-matrices/"
        + "tet:connectivity-matrix/"
        + "tet:underlay/tet:primary-path/tet:path-element/"
        + "tet:type/tet:label/tet:label-hop/"
        + "tet:te-label/tet:technology" {
    when "../../../../../../../../../../"
       + "nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    case flexi-grid {
      uses layer0-types:flexi-grid-path-label;
    }
  }
  /* Augment label hop of underlay backup path of connectivity-matrix */
  augment "/nw:networks/nw:network/nw:node/tet:te/"
        + "tet:te-node-attributes/tet:connectivity-matrices/"
        + "tet:connectivity-matrix/"
        + "tet:underlay/tet:backup-path/tet:path-element/"
        + "tet:type/tet:label/tet:label-hop/"
        + "tet:te-label/tet:technology" {
    when "../../../../../../../../../../"
       + "nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    case flexi-grid {
      uses layer0-types:flexi-grid-path-label;
    }
  }

Lopez de Vergara, et al.   Expires  January 8, 2020       [Page 49]


Internet-Draft     A YANG data model for Flexi-Grid     July 2019

  /* Augment label hop of route-exclude of connectivity-matrix */
  augment "/nw:networks/nw:network/nw:node/tet:te/"
        + "tet:te-node-attributes/tet:connectivity-matrices/"
        + "tet:connectivity-matrix/tet:optimizations/"
        + "tet:algorithm/tet:metric/tet:optimization-metric/"
        + "tet:explicit-route-exclude-objects/"
        + "tet:route-object-exclude-object/tet:type/"
        + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
    when "../../../../../../../../../../../"
       + "nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    case flexi-grid {
      uses layer0-types:flexi-grid-path-label;
    }
  }
  /* Augment label hop of route-include of connectivity-matrix */
  augment "/nw:networks/nw:network/nw:node/tet:te/"
        + "tet:te-node-attributes/tet:connectivity-matrices/"
        + "tet:connectivity-matrix/tet:optimizations/"
        + "tet:algorithm/tet:metric/tet:optimization-metric/"
        + "tet:explicit-route-include-objects/"
        + "tet:route-object-include-object/tet:type/"
        + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
    when "../../../../../../../../../../../"
       + "nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    case flexi-grid {
      uses layer0-types:flexi-grid-path-label;
    }
  }
  /* Augment label hop of path-route of connectivity-matrix */
  augment "/nw:networks/nw:network/nw:node/tet:te/"
        + "tet:te-node-attributes/tet:connectivity-matrices/"
        + "tet:connectivity-matrix/"
        + "tet:path-properties/tet:path-route-objects/"
        + "tet:path-route-object/tet:type/"
        + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
    when "../../../../../../../../../../"
       + "nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    case flexi-grid {
      uses layer0-types:flexi-grid-path-label;
    }
  }

Lopez de Vergara, et al.   Expires  January 8, 2020       [Page 50]


Internet-Draft     A YANG data model for Flexi-Grid     July 2019

  /* Augment label restrictions of connectivity-matrices
     information-source */
  augment "/nw:networks/nw:network/nw:node/tet:te/"
        + "tet:information-source-entry/"
        + "tet:connectivity-matrices/tet:label-restrictions/"
        + "tet:label-restriction" {
    when "../../../../../../nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    uses layer0-types:flexi-grid-label-restriction;
  }

  /* Augment label restrictions start of connectivity-matrices
     information-source */
  augment "/nw:networks/nw:network/nw:node/tet:te/"
        + "tet:information-source-entry/"
        + "tet:connectivity-matrices/tet:label-restrictions/"
        + "tet:label-restriction/"
        + "tet:label-start/tet:te-label/tet:technology" {
    when "../../../../../../../../"
       + "nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    case flexi-grid {
      uses layer0-types:flexi-grid-link-label;
    }
  }
  /* Augment label restrictions end of connectivity-matrices
     information-source */
  augment "/nw:networks/nw:network/nw:node/tet:te/"
        + "tet:information-source-entry/"
        + "tet:connectivity-matrices/tet:label-restrictions/"
        + "tet:label-restriction/"
        + "tet:label-end/tet:te-label/tet:technology" {
    when "../../../../../../../../"
       + "nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    case flexi-grid {
      uses layer0-types:flexi-grid-link-label;
    }
  }

Lopez de Vergara, et al.   Expires  January 8, 2020       [Page 51]


Internet-Draft     A YANG data model for Flexi-Grid     July 2019

  /* Augment label restrictions step of connectivity-matrices
     information-source */
  augment "/nw:networks/nw:network/nw:node/tet:te/"
        + "tet:information-source-entry/"
        + "tet:connectivity-matrices/tet:label-restrictions/"
        + "tet:label-restriction/"
        + "tet:label-step/tet:technology" {
    when "../../../../../../../"
       + "nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    case flexi-grid {
      uses layer0-types:flexi-grid-label-step;
    }
  }

  /* Augment label hop of underlay primary path of connectivity-matrices
information-source */
  augment "/nw:networks/nw:network/nw:node/tet:te/"
        + "tet:information-source-entry/tet:connectivity-matrices/"
        + "tet:underlay/tet:primary-path/tet:path-element/tet:type/"
        + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
    when "../../../../../../../../../"
       + "nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    case flexi-grid {
      uses layer0-types:flexi-grid-path-label;
    }
  }

  /* Augment label hop of underlay backup path of connectivity-matrices
information-source */
  augment "/nw:networks/nw:network/nw:node/tet:te/"
        + "tet:information-source-entry/tet:connectivity-matrices/"
        + "tet:underlay/tet:backup-path/tet:path-element/tet:type/"
        + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
    when "../../../../../../../../../"
       + "nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    case flexi-grid {
      uses layer0-types:flexi-grid-path-label;
    }
  }

Lopez de Vergara, et al.   Expires  January 8, 2020       [Page 52]


Internet-Draft     A YANG data model for Flexi-Grid     July 2019


  /* Augment label hop of route-exclude of connectivity-matrices
     information-source */
  augment "/nw:networks/nw:network/nw:node/tet:te/"
        + "tet:information-source-entry/tet:connectivity-matrices/"
        + "tet:optimizations/tet:algorithm/tet:metric/"
        + "tet:optimization-metric/"
        + "tet:explicit-route-exclude-objects/"
        + "tet:route-object-exclude-object/tet:type/"
        + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
    when "../../../../../../../../../../"
       + "nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    case flexi-grid {
      uses layer0-types:flexi-grid-path-label;
    }
  }

  /* Augment label hop of route-include of connectivity-matrices
     information-source */
  augment "/nw:networks/nw:network/nw:node/tet:te/"
        + "tet:information-source-entry/tet:connectivity-matrices/"
        + "tet:optimizations/tet:algorithm/tet:metric/"
        + "tet:optimization-metric/"
        + "tet:explicit-route-include-objects/"
        + "tet:route-object-include-object/tet:type/"
        + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
    when "../../../../../../../../../../"
       + "nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    case flexi-grid {
      uses layer0-types:flexi-grid-path-label;
    }
  }

Lopez de Vergara, et al.   Expires  January 8, 2020       [Page 53]


Internet-Draft     A YANG data model for Flexi-Grid     July 2019


  /* Augment label hop of path-route of connectivity-matrices
     information-source */
  augment "/nw:networks/nw:network/nw:node/tet:te/"
        + "tet:information-source-entry/tet:connectivity-matrices/"
        + "tet:path-properties/tet:path-route-objects/"
        + "tet:path-route-object/tet:type/"
        + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
    when "../../../../../../../../../"
       + "nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    case flexi-grid {
      uses layer0-types:flexi-grid-path-label;
    }
  }

  /* Augment ingress label restrictions of connectivity-matrix
     information-source */
  augment "/nw:networks/nw:network/nw:node/tet:te/"
        + "tet:information-source-entry/tet:connectivity-matrices/"
        + "tet:connectivity-matrix/"
        + "tet:from/tet:label-restrictions/tet:label-restriction" {
    when "../../../../../../../../"
       + "nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    uses layer0-types:flexi-grid-label-restriction;
  }

  /* Augment ingress label restrictions start of connectivity-matrix
information-source */
  augment "/nw:networks/nw:network/nw:node/tet:te/"
        + "tet:information-source-entry/tet:connectivity-matrices/"
        + "tet:connectivity-matrix/"
        + "tet:from/tet:label-restrictions/"
        + "tet:label-restriction/"
        + "tet:label-start/tet:te-label/tet:technology" {
    when "../../../../../../../../../../"
       + "nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    case flexi-grid {
      uses layer0-types:flexi-grid-link-label;
    }
  }

Lopez de Vergara, et al.   Expires  January 8, 2020       [Page 54]


Internet-Draft     A YANG data model for Flexi-Grid     July 2019

  /* Augment ingress label restrictions end of connectivity-matrix
information-source */
  augment "/nw:networks/nw:network/nw:node/tet:te/"
        + "tet:information-source-entry/tet:connectivity-matrices/"
        + "tet:connectivity-matrix/"
        + "tet:from/tet:label-restrictions/"
        + "tet:label-restriction/"
        + "tet:label-end/tet:te-label/tet:technology" {
    when "../../../../../../../../../../"
       + "nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    case flexi-grid {
      uses layer0-types:flexi-grid-link-label;
    }
  }
  /* Augment ingress label restrictions step of connectivity-matrix
information-source */
  augment "/nw:networks/nw:network/nw:node/tet:te/"
        + "tet:information-source-entry/tet:connectivity-matrices/"
        + "tet:connectivity-matrix/"
        + "tet:from/tet:label-restrictions/"
        + "tet:label-restriction/"
        + "tet:label-step/tet:technology" {
    when "../../../../../../../../../"
       + "nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    case flexi-grid {
      uses layer0-types:flexi-grid-label-step;
    }
  }
  /* Augment egress label restrictions of connectivity-matrix
     information-source */
  augment "/nw:networks/nw:network/nw:node/tet:te/"
        + "tet:information-source-entry/tet:connectivity-matrices/"
        + "tet:connectivity-matrix/"
        + "tet:to/tet:label-restrictions/tet:label-restriction" {
    when "../../../../../../../../"
       + "nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    uses layer0-types:flexi-grid-label-restriction;
  }

Lopez de Vergara, et al.   Expires  January 8, 2020       [Page 55]


Internet-Draft     A YANG data model for Flexi-Grid     July 2019

  /* Augment egress label restrictions start of connectivity-matrix
information-source */
  augment "/nw:networks/nw:network/nw:node/tet:te/"
        + "tet:information-source-entry/tet:connectivity-matrices/"
        + "tet:connectivity-matrix/"
        + "tet:to/tet:label-restrictions/tet:label-restriction/"
        + "tet:label-start/tet:te-label/tet:technology" {
    when "../../../../../../../../../../"
       + "nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    case flexi-grid {
      uses layer0-types:flexi-grid-link-label;
    }
  }
  /* Augment egress label restrictions end of connectivity-matrix
     information-source */
  augment "/nw:networks/nw:network/nw:node/tet:te/"
        + "tet:information-source-entry/tet:connectivity-matrices/"
        + "tet:connectivity-matrix/"
        + "tet:to/tet:label-restrictions/tet:label-restriction/"
        + "tet:label-end/tet:te-label/tet:technology" {
    when "../../../../../../../../../../"
       + "nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    case flexi-grid {
      uses layer0-types:flexi-grid-link-label;
    }
  }

  /* Augment egress label restrictions step of connectivity-matrix
     information-source */
  augment "/nw:networks/nw:network/nw:node/tet:te/"
        + "tet:information-source-entry/tet:connectivity-matrices/"
        + "tet:connectivity-matrix/"
        + "tet:to/tet:label-restrictions/tet:label-restriction/"
        + "tet:label-step/tet:technology" {
    when "../../../../../../../../../"
       + "nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    case flexi-grid {
      uses layer0-types:flexi-grid-label-step;
    }
  }

Lopez de Vergara, et al.   Expires  January 8, 2020       [Page 56]


Internet-Draft     A YANG data model for Flexi-Grid     July 2019

  /* Augment label hop of underlay primary path of connectivity-matrix
     information-source */
  augment "/nw:networks/nw:network/nw:node/tet:te/"
        + "tet:information-source-entry/tet:connectivity-matrices/"
        + "tet:connectivity-matrix/"
        + "tet:underlay/tet:primary-path/tet:path-element/tet:type/"
        + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
    when "../../../../../../../../../../"
       + "nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    case flexi-grid {
      uses layer0-types:flexi-grid-path-label;
    }
  }

  /* Augment label hop of underlay backup path of connectivity-matrix
     information-source */
  augment "/nw:networks/nw:network/nw:node/tet:te/"
        + "tet:information-source-entry/tet:connectivity-matrices/"
        + "tet:connectivity-matrix/"
        + "tet:underlay/tet:backup-path/tet:path-element/tet:type/"
        + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
    when "../../../../../../../../../../"
       + "nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    case flexi-grid {
      uses layer0-types:flexi-grid-path-label;
    }
  }

Lopez de Vergara, et al.   Expires  January 8, 2020       [Page 57]


Internet-Draft     A YANG data model for Flexi-Grid     July 2019


  /* Augment label hop of route-exclude of connectivity-matrix
     information-source */
  augment "/nw:networks/nw:network/nw:node/tet:te/"
        + "tet:information-source-entry/tet:connectivity-matrices/"
        + "tet:connectivity-matrix/"
        + "tet:optimizations/tet:algorithm/tet:metric/"
        + "tet:optimization-metric/"
        + "tet:explicit-route-exclude-objects/"
        + "tet:route-object-exclude-object/tet:type/"
        + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
    when "../../../../../../../../../../../"
       + "nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    case flexi-grid {
      uses layer0-types:flexi-grid-path-label;
    }
  }

  /* Augment label hop of route-include of connectivity-matrix
     information-source */
  augment "/nw:networks/nw:network/nw:node/tet:te/"
        + "tet:information-source-entry/tet:connectivity-matrices/"
        + "tet:connectivity-matrix/"
        + "tet:optimizations/tet:algorithm/tet:metric/"
        + "tet:optimization-metric/"
        + "tet:explicit-route-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/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    case flexi-grid {
      uses layer0-types:flexi-grid-path-label;
    }
  }

Lopez de Vergara, et al.   Expires  January 8, 2020       [Page 58]


Internet-Draft     A YANG data model for Flexi-Grid     July 2019


  /* Augment label hop of path-route of connectivity-matrix
     information-source */
  augment "/nw:networks/nw:network/nw:node/tet:te/"
        + "tet:information-source-entry/tet:connectivity-matrices/"
        + "tet:connectivity-matrix/"
        + "tet:path-properties/tet:path-route-objects/"
        + "tet:path-route-object/tet:type/"
        + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
    when "../../../../../../../../../../"
       + "nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    case flexi-grid {
      uses layer0-types:flexi-grid-path-label;
    }
  }

  /* Augment label restrictions of local-link-connectivities */
  augment "/nw:networks/nw:network/nw:node/tet:te/"
        + "tet:tunnel-termination-point/"
        + "tet:local-link-connectivities/"
        + "tet:label-restrictions/tet:label-restriction" {
    when "../../../../../../nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    uses layer0-types:flexi-grid-label-restriction;
  }

  /* Augment label restrictions start of local-link-connectivities */
  augment "/nw:networks/nw:network/nw:node/tet:te/"
      + "tet:tunnel-termination-point/"
      + "tet:local-link-connectivities/"
      + "tet:label-restrictions/tet:label-restriction/"
      + "tet:label-start/"
      + "tet:te-label/tet:technology" {
    when "../../../../../../../../"
       + "nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    case flexi-grid {
      uses layer0-types:flexi-grid-link-label;
    }
  }

Lopez de Vergara, et al.   Expires  January 8, 2020       [Page 59]


Internet-Draft     A YANG data model for Flexi-Grid     July 2019


  /* Augment label restrictions end of local-link-connectivities */
  augment "/nw:networks/nw:network/nw:node/tet:te/"
        + "tet:tunnel-termination-point/"
        + "tet:local-link-connectivities/"
        + "tet:label-restrictions/tet:label-restriction/"
        + "tet:label-end/"
        + "tet:te-label/tet:technology"{
    when "../../../../../../../../"
       + "nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    case flexi-grid {
      uses layer0-types:flexi-grid-link-label;
    }
  }
  /* Augment label restrictions step of local-link-connectivities */
  augment "/nw:networks/nw:network/nw:node/tet:te/"
        + "tet:tunnel-termination-point/"
        + "tet:local-link-connectivities/"
        + "tet:label-restrictions/tet:label-restriction/"
        + "tet:label-step/"
        + "tet:technology"{
    when "../../../../../../../"
       + "nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    case flexi-grid {
      uses layer0-types:flexi-grid-label-step;
    }
  }
  /* Augment label hop of underlay primary path of
     local-link-connectivities */
  augment "/nw:networks/nw:network/nw:node/tet:te/"
        + "tet:tunnel-termination-point/"
        + "tet:local-link-connectivities/"
        + "tet:underlay/tet:primary-path/tet:path-element/tet:type/"
        + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
    when "../../../../../../../../../"
       + "nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    case flexi-grid {
      uses layer0-types:flexi-grid-path-label;
    }
  }

Lopez de Vergara, et al.   Expires  January 8, 2020       [Page 60]


Internet-Draft     A YANG data model for Flexi-Grid     July 2019


  /* Augment label hop of underlay backup path of
     local-link-connectivities */
  augment "/nw:networks/nw:network/nw:node/tet:te/"
        + "tet:tunnel-termination-point/"
        + "tet:local-link-connectivities/"
        + "tet:underlay/tet:backup-path/tet:path-element/tet:type/"
        + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
    when "../../../../../../../../../"
       + "nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    case flexi-grid {
      uses layer0-types:flexi-grid-path-label;
    }
  }
  /* Augment label hop of route-exclude of local-link-connectivities */
  augment "/nw:networks/nw:network/nw:node/tet:te/"
        + "tet:tunnel-termination-point/"
        + "tet:local-link-connectivities/"
        + "tet:optimizations/tet:algorithm/tet:metric/"
        + "tet:optimization-metric/"
        + "tet:explicit-route-exclude-objects/"
        + "tet:route-object-exclude-object/tet:type/"
        + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
    when "../../../../../../../../../../"
       + "nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    case flexi-grid {
      uses layer0-types:flexi-grid-path-label;
    }
  }

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  /* Augment label hop of route-include of local-link-connectivities */
  augment "/nw:networks/nw:network/nw:node/tet:te/"
        + "tet:tunnel-termination-point/"
        + "tet:local-link-connectivities/"
        + "tet:optimizations/tet:algorithm/tet:metric/"
        + "tet:optimization-metric/"
        + "tet:explicit-route-include-objects/"
        + "tet:route-object-include-object/tet:type/"
        + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
    when "../../../../../../../../../../"
       + "nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    case flexi-grid {
      uses layer0-types:flexi-grid-path-label;
    }
  }
  /* Augment label hop of path-route of local-link-connectivities */
  augment "/nw:networks/nw:network/nw:node/tet:te/"
        + "tet:tunnel-termination-point/"
        + "tet:local-link-connectivities/"
        + "tet:path-properties/tet:path-route-objects/"
        + "tet:path-route-object/tet:type/"
        + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
    when "../../../../../../../../../"
       + "nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    case flexi-grid {
      uses layer0-types:flexi-grid-path-label;
    }
  }
  /* Augment label restrictions of local-link-connectivity (LLC) */
  augment "/nw:networks/nw:network/nw:node/tet:te/"
        + "tet:tunnel-termination-point/"
        + "tet:local-link-connectivities/"
        + "tet:local-link-connectivity/"
        + "tet:label-restrictions/tet:label-restriction" {
    when "../../../../../../../nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    uses layer0-types:flexi-grid-label-restriction;
  }

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 /* Augment label restrictions start of local-link-connectivity (LLC)
   */
  augment "/nw:networks/nw:network/nw:node/tet:te/"
        + "tet:tunnel-termination-point/"
        + "tet:local-link-connectivities/"
        + "tet:local-link-connectivity/"
        + "tet:label-restrictions/tet:label-restriction/"
        + "tet:label-start/tet:te-label/tet:technology" {
    when "../../../../../../../../../"
       + "nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    case flexi-grid {
      uses layer0-types:flexi-grid-link-label;
    }
  }
 /* Augment label restrictions end of local-link-connectivity (LLC) */
  augment "/nw:networks/nw:network/nw:node/tet:te/"
        + "tet:tunnel-termination-point/"
        + "tet:local-link-connectivities/"
        + "tet:local-link-connectivity/"
        + "tet:label-restrictions/tet:label-restriction/"
        + "tet:label-end/tet:te-label/tet:technology" {
    when "../../../../../../../../../"
       + "nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    case flexi-grid {
      uses layer0-types:flexi-grid-link-label;
    }
  }
  /* Augment label restrictions step of local-link-connectivity (LLC) */
  augment "/nw:networks/nw:network/nw:node/tet:te/"
        + "tet:tunnel-termination-point/"
        + "tet:local-link-connectivities/"
        + "tet:local-link-connectivity/"
        + "tet:label-restrictions/tet:label-restriction/"
        + "tet:label-step/tet:technology" {
    when "../../../../../../../../"
       + "nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    case flexi-grid {
      uses layer0-types:flexi-grid-label-step;
    }
  }

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  /* Augment label hop of underlay primary path of
     local-link-connectivity (LLC) */
  augment "/nw:networks/nw:network/nw:node/tet:te/"
        + "tet:tunnel-termination-point/"
        + "tet:local-link-connectivities/"
        + "tet:local-link-connectivity/"
        + "tet:underlay/tet:primary-path/tet:path-element/tet:type/"
        + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
    when "../../../../../../../../../../"
       + "nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    case flexi-grid {
      uses layer0-types:flexi-grid-path-label;
    }
  }
  /* Augment label hop of underlay backup path of
     local-link-connectivity (LLC) */
  augment "/nw:networks/nw:network/nw:node/tet:te/"
        + "tet:tunnel-termination-point/"
        + "tet:local-link-connectivities/"
        + "tet:local-link-connectivity/"
        + "tet:underlay/tet:backup-path/tet:path-element/tet:type/"
        + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
    when "../../../../../../../../../../"
       + "nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    case flexi-grid {
      uses layer0-types:flexi-grid-path-label;
    }
  }

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  /* Augment label hop of route-exclude of local-link-connectivity (LLC)
   */
  augment "/nw:networks/nw:network/nw:node/tet:te/"
        + "tet:tunnel-termination-point/"
        + "tet:local-link-connectivities/"
        + "tet:local-link-connectivity/"
        + "tet:optimizations/tet:algorithm/tet:metric/"
        + "tet:optimization-metric/"
        + "tet:explicit-route-exclude-objects/"
        + "tet:route-object-exclude-object/tet:type/"
        + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
    when "../../../../../../../../../../../"
       + "nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    case flexi-grid {
      uses layer0-types:flexi-grid-path-label;
    }
  }
  /* Augment label hop of route-include of local-link-connectivity (LLC)
   */
  augment "/nw:networks/nw:network/nw:node/tet:te/"
        + "tet:tunnel-termination-point/"
        + "tet:local-link-connectivities/"
        + "tet:local-link-connectivity/"
        + "tet:optimizations/tet:algorithm/tet:metric/"
        + "tet:optimization-metric/"
        + "tet:explicit-route-include-objects/"
        + "tet:route-object-include-object/tet:type/"
        + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
    when "../../../../../../../../../../../"
       + "nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    case flexi-grid {
      uses layer0-types:flexi-grid-path-label;
    }
  }

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  /* Augment label hop of path-route of local-link-connectivity (LLC)
   */
  augment "/nw:networks/nw:network/nw:node/tet:te/"
        + "tet:tunnel-termination-point/"
        + "tet:local-link-connectivities/"
        + "tet:local-link-connectivity/"
        + "tet:path-properties/tet:path-route-objects/"
        + "tet:path-route-object/tet:type/"
        + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
    when "../../../../../../../../../../"
       + "nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    case flexi-grid {
      uses layer0-types:flexi-grid-path-label;
    }
  }
  /* Augment label hop of underlay primary path of TE link */
  augment "/nw:networks/nw:network/nt:link/tet:te/"
        + "tet:te-link-attributes/"
        + "tet:underlay/tet:primary-path/tet:path-element/tet:type/"
        + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
    when "../../../../../../../../"
       + "nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    case flexi-grid {
      uses layer0-types:flexi-grid-path-label;
    }
  }
  /* Augment label hop of underlay backup path of TE link */
  augment "/nw:networks/nw:network/nt:link/tet:te/"
        + "tet:te-link-attributes/"
        + "tet:underlay/tet:backup-path/tet:path-element/tet:type/"
        + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
    when "../../../../../../../../"
       + "nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    case flexi-grid {
      uses layer0-types:flexi-grid-path-label;
    }
  }

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  /* Augment label restrictions of TE link */
  augment "/nw:networks/nw:network/nt:link/tet:te/"
        + "tet:te-link-attributes/"
        + "tet:label-restrictions/tet:label-restriction" {
    when "../../../../../nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    uses layer0-types:flexi-grid-label-restriction;
  }
  /* Augment label restrictions start of TE link */
  augment "/nw:networks/nw:network/nt:link/tet:te/"
        + "tet:te-link-attributes/"
        + "tet:label-restrictions/tet:label-restriction/"
        + "tet:label-start/tet:te-label/tet:technology" {
    when "../../../../../../../nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    case flexi-grid {
      uses layer0-types:flexi-grid-link-label;
    }
  }
  /* Augment label restrictions end of TE link */
  augment "/nw:networks/nw:network/nt:link/tet:te/"
        + "tet:te-link-attributes/"
        + "tet:label-restrictions/tet:label-restriction/"
        + "tet:label-end/tet:te-label/tet:technology" {
    when "../../../../../../../nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    case flexi-grid {
      uses layer0-types:flexi-grid-link-label;
    }
  }
  /* Augment label restrictions step of TE link */
  augment "/nw:networks/nw:network/nt:link/tet:te/"
        + "tet:te-link-attributes/"
        + "tet:label-restrictions/tet:label-restriction/"
        + "tet:label-step/tet:technology" {
    when "../../../../../../nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    case flexi-grid {
      uses layer0-types:flexi-grid-label-step;
    }
  }

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  /* Augment label restrictions of TE link information-source */
  augment "/nw:networks/nw:network/nt:link/tet:te/"
        + "tet:information-source-entry/"
        + "tet:label-restrictions/tet:label-restriction" {
    when "../../../../../nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    uses layer0-types:flexi-grid-label-restriction;
  }
  /* Augment label restrictions start of TE link information-source */
  augment "/nw:networks/nw:network/nt:link/tet:te/"
        + "tet:information-source-entry/"
        + "tet:label-restrictions/tet:label-restriction/"
        + "tet:label-start/tet:te-label/tet:technology" {
    when "../../../../../../../nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    case flexi-grid {
      uses layer0-types:flexi-grid-link-label;
    }
  }
  /* Augment label restrictions end of TE link information-source */
  augment "/nw:networks/nw:network/nt:link/tet:te/"
        + "tet:information-source-entry/"
        + "tet:label-restrictions/tet:label-restriction/"
        + "tet:label-end/tet:te-label/tet:technology" {
    when "../../../../../../../nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    case flexi-grid {
      uses layer0-types:flexi-grid-link-label;
    }
  }
  /* Augment label restrictions step of TE link information-source */
  augment "/nw:networks/nw:network/nt:link/tet:te/"
        + "tet:information-source-entry/"
        + "tet:label-restrictions/tet:label-restriction/"
        + "tet:label-step/tet:technology" {
    when "../../../../../../nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
    description "flexi-grid label.";
    case flexi-grid {
      uses layer0-types:flexi-grid-label-step;
    }
  }

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  /* Augment label hop of underlay primary path of TE link template */
  augment "/nw:networks/tet:te/tet:templates/"
        + "tet:link-template/tet:te-link-attributes/"
        + "tet:underlay/tet:primary-path/tet:path-element/tet:type/"
        + "tet:label/tet:label-hop/tet:te-label/tet:technology" {
/*
    when "../../../../../../../../../"
       + "nw:network-types/tet:te-topology/"
       + "flexi-grid:flexi-grid-topology" {
          description "Augment flexi-grid TE label";
    }
*/
    description "flexi-grid label.";
    case flexi-grid {
      uses layer0-types:flexi-grid-path-label;
    }
  }
  /* Augment label hop of underlay backup path of TE link template */
  augment "/nw:networks/tet:te/tet:templates/"
        + "tet:link-template/tet:te-link-attributes/"
        + "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/"
       + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
*/
    description "flexi-grid label.";
    case flexi-grid {
      uses layer0-types:flexi-grid-path-label;
    }
  }
  /* Augment label restrictions of TE link template */
  augment "/nw:networks/tet:te/tet:templates/"
        + "tet:link-template/tet:te-link-attributes/"
        + "tet:label-restrictions/tet:label-restriction" {
/*
    when "../../../../../nw:network-types/tet:te-topology/"
        + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
*/
    description "flexi-grid label.";
    uses layer0-types:flexi-grid-label-restriction;
  }

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  /* Augment label restrictions start of TE link template */
  augment "/nw:networks/tet:te/tet:templates/"
        + "tet:link-template/tet:te-link-attributes/"
        + "tet:label-restrictions/tet:label-restriction/"
        + "tet:label-start/tet:te-label/tet:technology" {
/*
    when "../../../../../../../nw:network-types/tet:te-topology/"
        + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
*/
    description "flexi-grid label.";
    case flexi-grid {
      uses layer0-types:flexi-grid-link-label;
    }
  }
  /* Augment label restrictions end of TE link template */
  augment "/nw:networks/tet:te/tet:templates/"
        + "tet:link-template/tet:te-link-attributes/"
        + "tet:label-restrictions/tet:label-restriction/"
        + "tet:label-end/tet:te-label/tet:technology" {
/*
    when "../../../../../../../nw:network-types/tet:te-topology/"
        + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
*/
    description "flexi-grid label.";
    case flexi-grid {
      uses layer0-types:flexi-grid-link-label;
    }
  }

  /* Augment label restrictions step of TE link template */
  augment "/nw:networks/tet:te/tet:templates/"
        + "tet:link-template/tet:te-link-attributes/"
        + "tet:label-restrictions/tet:label-restriction/"
        + "tet:label-step/tet:technology" {
/*
    when "../../../../../../nw:network-types/tet:te-topology/"
        + "flexi-grid:flexi-grid-topology" {
      description "Augment flexi-grid TE label";
    }
*/
    description "flexi-grid label.";
    case flexi-grid {
      uses layer0-types:flexi-grid-label-step;
    }
  }
}
   <CODE ENDS>

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6.3. License

   Copyright (c) 2019 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, are permitted provided that the following conditions
   are met:

   o  Redistributions of source code must retain the above copyright
      notice, this list of conditions and the following disclaimer.

   o  Redistributions in binary form must reproduce the above copyright
      notice, this list of conditions and the following disclaimer in
      the documentation and/or other materials provided with the
      distribution.

   o  Neither the name of Internet Society, IETF or IETF Trust, nor the
      names of specific contributors, may be used to endorse or promote
      products derived from this software without specific prior
      written permission.

   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
   FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
   COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
   INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
   BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
   LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
   CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
   ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   POSSIBILITY OF SUCH DAMAGE.


7. Security Considerations

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

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   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 over Secure Shell (SSH) [RFC6242] describes a
   method for invoking and running NETCONF within a Secure Shell (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.

   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


8. IANA Considerations

   The namespace used in the defined model has to register a URI in
   the IETF XML registry [RFC3688], as well as in the YANG Module
   Names registry [RFC6020].


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9. References

9.1. Normative References

   [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
             Requirement Levels", BCP 14, RFC 2119, March 1997.

   [RFC3688] Mealling, M., "The IETF XML Registry", BCP 81, RFC 3688,
             January 2004.

   [RFC5234] Crocker, D. and P. Overell, "Augmented BNF for Syntax
             Specifications: ABNF", STD 68, RFC 5234, January 2008,
             <http:/www.rfc-editor.org/info/rfc5234>.

   [RFC6020] Bjorklund, M., Ed., "YANG - A Data Modeling Language for
             the Network Configuration Protocol (NETCONF)", RFC 6020,
             October 2010.

   [RFC6241] R. Enns, Ed., M. Bjorklund, Ed., J. Schoenwaelder, Ed.,
             "Network Configuration Protocol (NETCONF)", RFC 6241, June
             2011.

   [RFC6242] M. Wasserman, "Using the NETCONF Protocol over Secure
             Shell (SSH)", RFC 6242, June 2011.

   [RFC7950] M. Bjorklund, Ed., "The YANG 1.1 Data Modeling
             Language", RFC 7950, August 2016.

   [RFC8040] A. Bierman, M. Bjorklund, K. Watsen, "RESTCONF Protocol",
             RFC 8040, January 2017.

   [RFC8341] A. Bierman, M. Bjorklund, "Network Configuration Access
             Control Model", RFC 8341, July 2019.

   [RFC8446] E. Rescorla, "The Transport Layer Security (TLS) Protocol
             Version 1.3", RFC8446, August 2018.

   [Layer0-Types] Y. Lee, D. Dhody, A. Guo, V. Lopez, D. King,
             "YANG Data Model for Layer0 Types", work in progress,
             draft-ietf-ccamp-layer0-types-01, 2019.

   [TE-TOPO] X. Liu, I. Bryskin, V. Pavan Beeram, T. Saad, H. Shah,
             O. Gonzalez De Dios, "YANG Data Model for TE Topologies",
             work in progress, draft-ietf-teas-yang-te-topo-22.txt,
             2019.


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9.2. Informative References

   [RFC7446] Y. Lee, G. Bernstein, D. Li, W. Imajuku, "Routing and
             Wavelength Assignment Information Model for Wavelength
             Switched Optical Networks", RFC 7446, Feburary 2015.

   [RFC7581] G. Bernstein, Y. Lee, D. Li, W. Imajuku, "Routing and
             Wavelength Assignment Information Encoding for Wavelength
             Switched Optical Networks", RFC 7581, June 2015.

   [RFC7698] O. Gonzalez de Dios, R. Casellas, Eds. "Framework and
             Requirements for GMPLS-Based Control of Flexi-Grid Dense
             Wavelength Division Multiplexing (DWDM) Networks",
             RFC7698, November 2015.

   [RFC8340] M. Bjorklund and L. Berger, Ed., "YANG Tree Diagrams", RFC
             8340, March 2018.

   [RFC8345] A. Clemm, J. Medved, R. Varga, N. Bahadur, H.
             Ananthakrishnan, X. Liu, "A Data Model for Network
             Topologies", RFC 8345, July 2019.

   [I-D.draft-dharini-ccamp-dwdm-if-yang] Galimberti, G., Kunze, R.,
             Lam, K., Hiremagalur, D., Grammel, G., Fang, L., Ratterree,
             G., Eds., "A YANG model to manage the optical interface
             parameters for an external transponder in a WDM network",
             Internet Draft,
             draft-dharini-ccamp-dwdm-if-param-yang-06.txt, 2018.

   [I-D.draft-ietf-ccamp-wson-yang] Lee, Y. Dhody, D., Zhang, X., Guo,
             A., Lopez, V., King, D., Yoon, B.,"A Yang Data Model for
             WSON Optical Networks", Internet Draft,
             draft-ietf-ccamp-wson-yang-22.txt, 2019.

   [I-D.draft-ietf-ccamp-flexigrid-media-channel-yang] Lopez de
             Vergara, J., Perdices, D., Lopez, V., Gonzalez de Dios, O.,
             King, D., Lee, Y., Galimberti, G., "YANG data model for
             Flexi-Grid media-channels", Internet Draft,
             draft-ietf-ccamp-flexigrid-media-channel-yang-02, 2019.


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10. Contributors

   The model presented in this paper was contributed to by more people
   than can be listed on the author list.  Additional contributors
   include:

   o Oscar Gonzalez de Dios, Telefonica I+D/GCTO
   o Gabriele Galimberti, Cisco Photonics Srl
   o Zafar Ali, Cisco Systems
   o Daniel Michaud Vallinoto, Universidad Autonoma de Madrid

11. Acknowledgments

   The work presented in this Internet-Draft 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, and by the Spanish Ministry of Economy and Competitiveness
   under the project TRAFICA, MINECO/FEDER TEC2015-69417-C2-1-R.

Authors' Addresses

   Jorge E. Lopez de Vergara Mendez
   Universidad Autonoma de Madrid
   Escuela Politecnica Superior
   C/Francisco Tomas y Valiente, 11
   E-28049 Madrid, Spain

   Email: jorge.lopez_vergara@uam.es

   Daniel Perdices Burrero
   Naudit High Performance Computing and Networking, S.L.
   C/Faraday, 7
   E-28049 Madrid, Spain

   Email: daniel.perdices@naudit.es

   Victor Lopez
   Telefonica I+D/GCTO
   Distrito Telefonica
   E-28050 Madrid, Spain

   Email: victor.lopezalvarez@telefonica.com

   Daniel King
   Lancaster University

   Email: d.king@lancaster.ac.uk

   Young Lee
   Futurewei Technologies

   Email: younglee.tx@gmail.com


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