CCAMP Working Group                                             H. Zheng
Internet-Draft                                                    A. Guo
Intended status: Standards Track                                 I. Busi
Expires: January 3, February 11, 2019                           Huawei Technologies
                                                               A. Sharma
                                                                  Google
                                                                  R. Rao
                                                                Infinera
                                                              S. Belotti
                                                                   Nokia
                                                                V. Lopez
                                                              Telefonica
                                                                   Y. Li
                                                            China Mobile
                                                                   Y. Xu
                                                                   CAICT
                                                            July 2,
                                                         August 10, 2018

                         OTN Tunnel YANG Model
                  draft-ietf-ccamp-otn-tunnel-model-03
                  draft-ietf-ccamp-otn-tunnel-model-04

Abstract

   This document describes the YANG data model for OTN Tunnels.

Status of This Memo

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

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   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on January 3, February 11, 2019.

Copyright Notice

   Copyright (c) 2018 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (https://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
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   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terminology and Notations . . . . . . . . . . . . . . . . . .   2
   3.  OTN Tunnel Model Description  . . . . . . . . . . . . . . . .   3
     3.1.  Overview of OTN Tunnel Model  . . . . . . . . . . . . . .   3
     3.2.  OTN-specific Parameters in Tunnel Model . . . . . . . . .   3   4
     3.3.  OTN Path Compute RPC  . . . . . . . . . . . . . . . . . .   4
   4.  OTN Tunnel YANG Tree  . . . . . . . . . . . . . . . . . . . .   4
   5.  OTN Tunnel YANG Code  . . . . . . . . . . . . . . . . . . . .  21
   6.  OTN Types YANG Code . . . . . . . . . . . . . . . . . . . . .  48
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .  60  57
   8.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  60  58
   9.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  60  58
   10. Contributors  . . . . . . . . . . . . . . . . . . . . . . . .  60  58
   11. References  . . . . . . . . . . . . . . . . . . . . . . . . .  61  59
     11.1.  Normative References . . . . . . . . . . . . . . . . . .  61  59
     11.2.  Informative References . . . . . . . . . . . . . . . . .  62  60
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  62  61

1.  Introduction

   OTN transport networks can carry various types of client services.
   In many cases, the client signal is carried over an OTN tunnel across
   connected domains in a multi-domain network.  These OTN services can
   either be transported or switched in the OTN network.  If an OTN
   tunnel is switched, then additional parameters need to be provided to
   create a Mux OTN service.

   This document provides YANG model for creating OTN tunnel.  The model
   augments the TE Tunnel model.

2.  Terminology and Notations

   A simplified graphical representation of the data model is used in
   this document.  The meaning of the symbols in the YANG data tree
   presented later in this draft is defined in

   [I-D.ietf-netmod-yang-tree-diagrams].  They are provided below for
   reference.

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

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

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

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

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

   o  More OTN specific terms can be found in
      [I-D.ietf-ccamp-otn-topo-yang].

3.  OTN Tunnel Model Description

3.1.  Overview of OTN Tunnel Model

   The OTN tunnel model is using TE tunnel [I-D.ietf-teas-yang-te] as a
   basic model and augment to the TE tunnel with OTN-specific
   parameters, including the bandwidth information and label
   information.  It is also worth noting that the OTN tunnel
   provisioning is usually based on the OTN topology.  Therefore the OTN
   tunnel model is usually used together with OTN topology model
   specified in [I-D.ietf-ccamp-otn-topo-yang].  The OTN tunnel model
   also imports a few type modules, including ietf-otn-types, ietf-te-
   types and ietf-inet-types.

   More scenarios and model applications can be found in
   [I-D.ietf-ccamp-transport-nbi-app-statement] and
   [I-D.ietf-teas-actn-yang].  The current model is following the YANG
   language specification as [RFC7950], and the corresponding protocol
   is recommended to be Netconf protocol in [RFC6241] or RESTconf
   protocol in [RFC8040].

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

3.2.  OTN-specific Parameters in Tunnel Model

   OTN specific parameters have been augmenting to the TE tunnel models.
   The attributes on both of the source and destination need to be
   configured when setting up the tunnel.  Typical parameters, including
   client signal, TPN, TSG and corresponding tributary slot information,
   are required in the OTN tunnel model.  These parameters are
   consistent with the framework in [RFC7062], and the specification in
   [RFC7138] and [RFC7139].

   The OTN bandwidth information has been augmenting to various sections
   of TE tunnel models, including tunnel bandwidth, primary path
   bandwidth and so on.  The OTN label information has been augmenting
   to label hop of a group of routing objects and also LSPs.

3.3.  OTN Path Compute RPC

   Similarly with TE tunnel, a 'compute-only' mode of OTN tunnel model
   is also supported for stateful path computation.  Given the OTN
   tunnel computed, the client may query and/or subscribe on the tunnel
   to be notified whenever it changes.  In addition, also a stateless
   Remote Procedural Call (RPC) is specified.  On receiving this RPC,
   the provider is expected to compute the available path subject to the
   constraints specified in RPC and feedback to the client without any
   changing of the OTN network or the OTN tunnels.

4.  OTN Tunnel YANG Tree

module: ietf-otn-tunnel
  augment /te:te/te:tunnels/te:tunnel:
    +--rw src-client-signal?     identityref
    +--rw dst-client-signal?     identityref
  augment /te:te/te:globals/te:named-path-constraints
          /te:named-path-constraint/te:te-bandwidth/te:technology:
    +--:(otn)
       +--rw odu-type?   identityref
  augment /te:te/te:tunnels/te:tunnel/te:te-bandwidth/te:technology:
    +--:(otn)
       +--rw odu-type?   identityref
  augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths
          /te:p2p-primary-path/te:te-bandwidth/te:technology:
    +--:(otn)
       +--rw odu-type?   identityref
  augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths
          /te:p2p-primary-path/te:p2p-reverse-primary-path
          /te:te-bandwidth/te:technology:

    +--:(otn)
       +--rw odu-type?   identityref
  augment /te:te/te:tunnels/te:tunnel/te:p2p-secondary-paths
          /te:p2p-secondary-path/te:te-bandwidth/te:technology:
    +--:(otn)
       +--rw odu-type?   identityref
  augment /te:te/te:globals/te:named-path-constraints
          /te:named-path-constraint/te:explicit-route-objects
          /te:route-object-exclude-always/te:type/te:label
          /te:label-hop/te:te-label/te:technology:
    +--:(otn)
       +--rw tpn?       uint16
       +--rw tsg?       identityref
       +--rw ts-list?   string
  augment /te:te/te:globals/te:named-path-constraints
          /te:named-path-constraint/te:explicit-route-objects
          /te:route-object-include-exclude/te:type/te:label
          /te:label-hop/te:te-label/te:technology:
    +--:(otn)
       +--rw tpn?       uint16
       +--rw tsg?       identityref
       +--rw ts-list?   string
  augment /te:te/te:globals/te:named-path-constraints
          /te:named-path-constraint/te:path-in-segment
          /te:forward/te:label-restrictions/te:label-restriction:
    +--rw range-type?   identityref
    +--rw tsg?          identityref
    +--rw priority?     uint8
  augment /te:te/te:globals/te:named-path-constraints
          /te:named-path-constraint/te:path-in-segment/te:forward
          /te:label-restrictions/te:label-restriction/te:label-start
          /te:te-label/te:technology:
    +--:(otn)
       +--rw (otn-label-type)?
          +--:(tributary-port)
          |  +--rw tpn?   uint16
          +--:(tributary-slot)
             +--rw ts?    uint16
  augment /te:te/te:globals/te:named-path-constraints
          /te:named-path-constraint/te:path-in-segment/te:forward
          /te:label-restrictions/te:label-restriction/te:label-end
          /te:te-label/te:technology:
    +--:(otn)
       +--rw (otn-label-type)?
          +--:(tributary-port)
          |  +--rw tpn?   uint16
          +--:(tributary-slot)
             +--rw ts?    uint16

  augment /te:te/te:globals/te:named-path-constraints
          /te:named-path-constraint/te:path-in-segment/te:reverse
          /te:label-restrictions/te:label-restriction:
    +--rw range-type?   identityref
    +--rw tsg?          identityref
    +--rw priority?     uint8
  augment /te:te/te:globals/te:named-path-constraints
          /te:named-path-constraint/te:path-in-segment/te:reverse
          /te:label-restrictions/te:label-restriction/te:label-start
          /te:te-label/te:technology:
    +--:(otn)
       +--rw (otn-label-type)?
          +--:(tributary-port)
          |  +--rw tpn?   uint16
          +--:(tributary-slot)
             +--rw ts?    uint16
  augment /te:te/te:globals/te:named-path-constraints
          /te:named-path-constraint/te:path-in-segment/te:reverse
          /te:label-restrictions/te:label-restriction/te:label-end
          /te:te-label/te:technology:
    +--:(otn)
       +--rw (otn-label-type)?
          +--:(tributary-port)
          |  +--rw tpn?   uint16
          +--:(tributary-slot)
             +--rw ts?    uint16
  augment /te:te/te:globals/te:named-path-constraints
          /te:named-path-constraint/te:path-out-segment/te:forward
          /te:label-restrictions/te:label-restriction:
    +--rw range-type?   identityref
    +--rw tsg?          identityref
    +--rw priority?     uint8
  augment /te:te/te:globals/te:named-path-constraints
          /te:named-path-constraint/te:path-out-segment/te:forward
          /te:label-restrictions/te:label-restriction/te:label-start
          /te:te-label/te:technology:
    +--:(otn)
       +--rw (otn-label-type)?
          +--:(tributary-port)
          |  +--rw tpn?   uint16
          +--:(tributary-slot)
             +--rw ts?    uint16
  augment /te:te/te:globals/te:named-path-constraints
          /te:named-path-constraint/te:path-out-segment/te:forward
          /te:label-restrictions/te:label-restriction/te:label-end
          /te:te-label/te:technology:
    +--:(otn)
       +--rw (otn-label-type)?
          +--:(tributary-port)
          |  +--rw tpn?   uint16
          +--:(tributary-slot)
             +--rw ts?    uint16
  augment /te:te/te:globals/te:named-path-constraints
          /te:named-path-constraint/te:path-out-segment/te:reverse
          /te:label-restrictions/te:label-restriction:
    +--rw range-type?   identityref
    +--rw tsg?          identityref
    +--rw priority?     uint8
  augment /te:te/te:globals/te:named-path-constraints
          /te:named-path-constraint/te:path-out-segment/te:reverse
          /te:label-restrictions/te:label-restriction/te:label-start
          /te:te-label/te:technology:
    +--:(otn)
       +--rw (otn-label-type)?
          +--:(tributary-port)
          |  +--rw tpn?   uint16
          +--:(tributary-slot)
             +--rw ts?    uint16
  augment /te:te/te:globals/te:named-path-constraints
          /te:named-path-constraint/te:path-out-segment/te:reverse
          /te:label-restrictions/te:label-restriction/te:label-end
          /te:te-label/te:technology:
    +--:(otn)
       +--rw (otn-label-type)?
          +--:(tributary-port)
          |  +--rw tpn?   uint16
          +--:(tributary-slot)
             +--rw ts?    uint16
  augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths
          /te:p2p-primary-path/te:optimizations/te:algorithm/te:metric
          /te:optimization-metric/te:explicit-route-exclude-objects
          /te:route-object-exclude-object/te:type/te:label
          /te:label-hop/te:te-label/te:technology:
    +--:(otn)
       +--rw tpn?       uint16
       +--rw tsg?       identityref
       +--rw ts-list?   string
  augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths
          /te:p2p-primary-path/te:optimizations/te:algorithm/te:metric
          /te:optimization-metric/te:explicit-route-include-objects
          /te:route-object-include-object/te:type/te:label/te:label-hop
          /te:te-label/te:technology:
    +--:(otn)
       +--rw tpn?       uint16
       +--rw tsg?       identityref
       +--rw ts-list?   string

  augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths
          /te:p2p-primary-path/te:explicit-route-objects
          /te:route-object-exclude-always/te:type/te:label
          /te:label-hop/te:te-label/te:technology:
    +--:(otn)
       +--rw tpn?       uint16
       +--rw tsg?       identityref
       +--rw ts-list?   string
  augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths
          /te:p2p-primary-path/te:explicit-route-objects
          /te:route-object-include-exclude/te:type/te:label
          /te:label-hop/te:te-label/te:technology:
    +--:(otn)
       +--rw tpn?       uint16
       +--rw tsg?       identityref
       +--rw ts-list?   string
  augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths
          /te:p2p-primary-path/te:path-in-segment/te:forward
          /te:label-restrictions/te:label-restriction:
    +--rw range-type?   identityref
    +--rw tsg?          identityref
    +--rw priority?     uint8
  augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths
          /te:p2p-primary-path/te:path-in-segment/te:forward
          /te:label-restrictions/te:label-restriction
          /te:label-start/te:te-label/te:technology:
    +--:(otn)
       +--rw (otn-label-type)?
          +--:(tributary-port)
          |  +--rw tpn?   uint16
          +--:(tributary-slot)
             +--rw ts?    uint16
  augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths
          /te:p2p-primary-path/te:path-in-segment/te:forward
          /te:label-restrictions/te:label-restriction
          /te:label-end/te:te-label/te:technology:
    +--:(otn)
       +--rw (otn-label-type)?
          +--:(tributary-port)
          |  +--rw tpn?   uint16
          +--:(tributary-slot)
             +--rw ts?    uint16
  augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths
          /te:p2p-primary-path/te:path-in-segment/te:reverse
          /te:label-restrictions/te:label-restriction:
    +--rw range-type?   identityref
    +--rw tsg?          identityref
    +--rw priority?     uint8

  augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths
          /te:p2p-primary-path/te:path-in-segment/te:reverse
          /te:label-restrictions/te:label-restriction
          /te:label-start/te:te-label/te:technology:
    +--:(otn)
       +--rw (otn-label-type)?
          +--:(tributary-port)
          |  +--rw tpn?   uint16
          +--:(tributary-slot)
             +--rw ts?    uint16
  augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths
          /te:p2p-primary-path/te:path-in-segment/te:reverse
          /te:label-restrictions/te:label-restriction/te:label-end
          /te:te-label/te:technology:
    +--:(otn)
       +--rw (otn-label-type)?
          +--:(tributary-port)
          |  +--rw tpn?   uint16
          +--:(tributary-slot)
             +--rw ts?    uint16
  augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths
          /te:p2p-primary-path/te:path-out-segment/te:forward
          /te:label-restrictions/te:label-restriction:
    +--rw range-type?   identityref
    +--rw tsg?          identityref
    +--rw priority?     uint8
  augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths
          /te:p2p-primary-path/te:path-out-segment/te:forward
          /te:label-restrictions/te:label-restriction/te:label-start
          /te:te-label/te:technology:
    +--:(otn)
       +--rw (otn-label-type)?
          +--:(tributary-port)
          |  +--rw tpn?   uint16
          +--:(tributary-slot)
             +--rw ts?    uint16
  augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths
          /te:p2p-primary-path/te:path-out-segment/te:forward
          /te:label-restrictions/te:label-restriction/te:label-end
          /te:te-label/te:technology:
    +--:(otn)
       +--rw (otn-label-type)?
          +--:(tributary-port)
          |  +--rw tpn?   uint16
          +--:(tributary-slot)
             +--rw ts?    uint16
  augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths
          /te:p2p-primary-path/te:path-out-segment/te:reverse
          /te:label-restrictions/te:label-restriction:
    +--rw range-type?   identityref
    +--rw tsg?          identityref
    +--rw priority?     uint8
  augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths
          /te:p2p-primary-path/te:path-out-segment/te:reverse
          /te:label-restrictions/te:label-restriction/te:label-start
          /te:te-label/te:technology:
    +--:(otn)
       +--rw (otn-label-type)?
          +--:(tributary-port)
          |  +--rw tpn?   uint16
          +--:(tributary-slot)
             +--rw ts?    uint16
  augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths
          /te:p2p-primary-path/te:path-out-segment/te:reverse
          /te:label-restrictions/te:label-restriction/te:label-end
          /te:te-label/te:technology:
    +--:(otn)
       +--rw (otn-label-type)?
          +--:(tributary-port)
          |  +--rw tpn?   uint16
          +--:(tributary-slot)
             +--rw ts?    uint16
  augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths
          /te:p2p-primary-path/te:state/te:path-properties
          /te:path-route-objects/te:path-computed-route-object
          /te:state/te:type/te:label/te:label-hop/te:te-label
          /te:technology:
    +--:(otn)
       +--ro tpn?       uint16
       +--ro tsg?       identityref
       +--ro ts-list?   string
  augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths
          /te:p2p-primary-path/te:state/te:lsps/te:lsp
          /te:lsp-record-route-subobjects/te:record-route-subobject
          /te:type/te:label/te:label-hop/te:te-label/te:technology:
    +--:(otn)
       +--ro tpn?       uint16
       +--ro tsg?       identityref
       +--ro ts-list?   string
  augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths
          /te:p2p-primary-path/te:state/te:lsps/te:lsp
          /te:path-properties/te:path-route-objects
          /te:path-computed-route-object/te:state/te:type/te:label
          /te:label-hop/te:te-label/te:technology:
    +--:(otn)
       +--ro tpn?       uint16
       +--ro tsg?       identityref
       +--ro ts-list?   string
  augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths
          /te:p2p-primary-path/te:p2p-reverse-primary-path
          /te:optimizations/te:algorithm/te:metric
          /te:optimization-metric/te:explicit-route-exclude-objects
          /te:route-object-exclude-object/te:type/te:label
          /te:label-hop/te:te-label/te:technology:
    +--:(otn)
       +--rw tpn?       uint16
       +--rw tsg?       identityref
       +--rw ts-list?   string
  augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths
          /te:p2p-primary-path/te:p2p-reverse-primary-path
          /te:optimizations/te:algorithm/te:metric
          /te:optimization-metric/te:explicit-route-include-objects
          /te:route-object-include-object/te:type/te:label
          /te:label-hop/te:te-label/te:technology:
    +--:(otn)
       +--rw tpn?       uint16
       +--rw tsg?       identityref
       +--rw ts-list?   string
  augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths
          /te:p2p-primary-path/te:p2p-reverse-primary-path
          /te:explicit-route-objects/te:route-object-exclude-always
          /te:type/te:label/te:label-hop/te:te-label/te:technology:
    +--:(otn)
       +--rw tpn?       uint16
       +--rw tsg?       identityref
       +--rw ts-list?   string
  augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths
          /te:p2p-primary-path/te:p2p-reverse-primary-path
          /te:explicit-route-objects/te:route-object-include-exclude
          /te:type/te:label/te:label-hop/te:te-label/te:technology:
    +--:(otn)
       +--rw tpn?       uint16
       +--rw tsg?       identityref
       +--rw ts-list?   string
  augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths
          /te:p2p-primary-path/te:p2p-reverse-primary-path
          /te:path-in-segment/te:forward/te:label-restrictions
          /te:label-restriction:
    +--rw range-type?   identityref
    +--rw tsg?          identityref
    +--rw priority?     uint8
  augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths
          /te:p2p-primary-path/te:p2p-reverse-primary-path
          /te:path-in-segment/te:forward/te:label-restrictions
          /te:label-restriction/te:label-start/te:te-label
          /te:technology:
    +--:(otn)
       +--rw (otn-label-type)?
          +--:(tributary-port)
          |  +--rw tpn?   uint16
          +--:(tributary-slot)
             +--rw ts?    uint16
  augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths
          /te:p2p-primary-path/te:p2p-reverse-primary-path
          /te:path-in-segment/te:forward/te:label-restrictions
          /te:label-restriction/te:label-end/te:te-label
          /te:technology:
    +--:(otn)
       +--rw (otn-label-type)?
          +--:(tributary-port)
          |  +--rw tpn?   uint16
          +--:(tributary-slot)
             +--rw ts?    uint16
  augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths
          /te:p2p-primary-path/te:p2p-reverse-primary-path
          /te:path-in-segment/te:reverse/te:label-restrictions
          /te:label-restriction:
    +--rw range-type?   identityref
    +--rw tsg?          identityref
    +--rw priority?     uint8
  augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths
          /te:p2p-primary-path/te:p2p-reverse-primary-path
          /te:path-in-segment/te:reverse/te:label-restrictions
          /te:label-restriction/te:label-start/te:te-label
          /te:technology:
    +--:(otn)
       +--rw (otn-label-type)?
          +--:(tributary-port)
          |  +--rw tpn?   uint16
          +--:(tributary-slot)
             +--rw ts?    uint16
  augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths
          /te:p2p-primary-path/te:p2p-reverse-primary-path
          /te:path-in-segment/te:reverse/te:label-restrictions
          /te:label-restriction/te:label-end/te:te-label
          /te:technology:
    +--:(otn)
       +--rw (otn-label-type)?
          +--:(tributary-port)
          |  +--rw tpn?   uint16
          +--:(tributary-slot)
             +--rw ts?    uint16

  augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths
          /te:p2p-primary-path/te:p2p-reverse-primary-path
          /te:path-out-segment/te:forward/te:label-restrictions
          /te:label-restriction:
    +--rw range-type?   identityref
    +--rw tsg?          identityref
    +--rw priority?     uint8
  augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths
          /te:p2p-primary-path/te:p2p-reverse-primary-path
          /te:path-out-segment/te:forward/te:label-restrictions
          /te:label-restriction/te:label-start/te:te-label
          /te:technology:
    +--:(otn)
       +--rw (otn-label-type)?
          +--:(tributary-port)
          |  +--rw tpn?   uint16
          +--:(tributary-slot)
             +--rw ts?    uint16
  augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths
          /te:p2p-primary-path/te:p2p-reverse-primary-path
          /te:path-out-segment/te:forward/te:label-restrictions
          /te:label-restriction/te:label-end/te:te-label
          /te:technology:
    +--:(otn)
       +--rw (otn-label-type)?
          +--:(tributary-port)
          |  +--rw tpn?   uint16
          +--:(tributary-slot)
             +--rw ts?    uint16
  augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths
          /te:p2p-primary-path/te:p2p-reverse-primary-path
          /te:path-out-segment/te:reverse/te:label-restrictions
          /te:label-restriction:
    +--rw range-type?   identityref
    +--rw tsg?          identityref
    +--rw priority?     uint8
  augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths
          /te:p2p-primary-path/te:p2p-reverse-primary-path
          /te:path-out-segment/te:reverse/te:label-restrictions
          /te:label-restriction/te:label-start/te:te-label
          /te:technology:
    +--:(otn)
       +--rw (otn-label-type)?
          +--:(tributary-port)
          |  +--rw tpn?   uint16
          +--:(tributary-slot)
             +--rw ts?    uint16
  augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths
          /te:p2p-primary-path/te:p2p-reverse-primary-path
          /te:path-out-segment/te:reverse/te:label-restrictions
          /te:label-restriction/te:label-end/te:te-label
          /te:technology:
    +--:(otn)
       +--rw (otn-label-type)?
          +--:(tributary-port)
          |  +--rw tpn?   uint16
          +--:(tributary-slot)
             +--rw ts?    uint16
  augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths
          /te:p2p-primary-path/te:p2p-reverse-primary-path
          /te:state/te:path-properties/te:path-route-objects
          /te:path-computed-route-object/te:state/te:type
          /te:label/te:label-hop/te:te-label/te:technology:
    +--:(otn)
       +--ro tpn?       uint16
       +--ro tsg?       identityref
       +--ro ts-list?   string
  augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths
          /te:p2p-primary-path/te:p2p-reverse-primary-path
          /te:state/te:lsps/te:lsp/te:lsp-record-route-subobjects
          /te:record-route-subobject/te:type/te:label/te:label-hop
          /te:te-label/te:technology:
    +--:(otn)
       +--ro tpn?       uint16
       +--ro tsg?       identityref
       +--ro ts-list?   string
  augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths
          /te:p2p-primary-path/te:p2p-reverse-primary-path
          /te:state/te:lsps/te:lsp/te:path-properties
          /te:path-route-objects/te:path-computed-route-object
          /te:state/te:type/te:label/te:label-hop/te:te-label
          /te:technology:
    +--:(otn)
       +--ro tpn?       uint16
       +--ro tsg?       identityref
       +--ro ts-list?   string
  augment /te:te/te:tunnels/te:tunnel/te:p2p-secondary-paths
          /te:p2p-secondary-path/te:optimizations/te:algorithm
          /te:metric/te:optimization-metric
          /te:explicit-route-exclude-objects
          /te:route-object-exclude-object/te:type/te:label
          /te:label-hop/te:te-label/te:technology:
    +--:(otn)
       +--rw tpn?       uint16
       +--rw tsg?       identityref
       +--rw ts-list?   string

  augment /te:te/te:tunnels/te:tunnel/te:p2p-secondary-paths
          /te:p2p-secondary-path/te:optimizations/te:algorithm
          /te:metric/te:optimization-metric
          /te:explicit-route-include-objects
          /te:route-object-include-object/te:type/te:label
          /te:label-hop/te:te-label/te:technology:
    +--:(otn)
       +--rw tpn?       uint16
       +--rw tsg?       identityref
       +--rw ts-list?   string
  augment /te:te/te:tunnels/te:tunnel/te:p2p-secondary-paths
          /te:p2p-secondary-path/te:explicit-route-objects
          /te:route-object-exclude-always/te:type/te:label
          /te:label-hop/te:te-label/te:technology:
    +--:(otn)
       +--rw tpn?       uint16
       +--rw tsg?       identityref
       +--rw ts-list?   string
  augment /te:te/te:tunnels/te:tunnel/te:p2p-secondary-paths
          /te:p2p-secondary-path/te:explicit-route-objects
          /te:route-object-include-exclude/te:type/te:label
          /te:label-hop/te:te-label/te:technology:
    +--:(otn)
       +--rw tpn?       uint16
       +--rw tsg?       identityref
       +--rw ts-list?   string
  augment /te:te/te:tunnels/te:tunnel/te:p2p-secondary-paths
          /te:p2p-secondary-path/te:path-in-segment/te:forward
          /te:label-restrictions/te:label-restriction:
    +--rw range-type?   identityref
    +--rw tsg?          identityref
    +--rw priority?     uint8
  augment /te:te/te:tunnels/te:tunnel/te:p2p-secondary-paths
          /te:p2p-secondary-path/te:path-in-segment/te:forward
          /te:label-restrictions/te:label-restriction/te:label-start
          /te:te-label/te:technology:
    +--:(otn)
       +--rw (otn-label-type)?
          +--:(tributary-port)
          |  +--rw tpn?   uint16
          +--:(tributary-slot)
             +--rw ts?    uint16
  augment /te:te/te:tunnels/te:tunnel/te:p2p-secondary-paths
          /te:p2p-secondary-path/te:path-in-segment/te:forward
          /te:label-restrictions/te:label-restriction/te:label-end
          /te:te-label/te:technology:
    +--:(otn)
       +--rw (otn-label-type)?
          +--:(tributary-port)
          |  +--rw tpn?   uint16
          +--:(tributary-slot)
             +--rw ts?    uint16
  augment /te:te/te:tunnels/te:tunnel/te:p2p-secondary-paths
          /te:p2p-secondary-path/te:path-in-segment/te:reverse
          /te:label-restrictions/te:label-restriction:
    +--rw range-type?   identityref
    +--rw tsg?          identityref
    +--rw priority?     uint8
  augment /te:te/te:tunnels/te:tunnel/te:p2p-secondary-paths
          /te:p2p-secondary-path/te:path-in-segment/te:reverse
          /te:label-restrictions/te:label-restriction/te:label-start
          /te:te-label/te:technology:
    +--:(otn)
       +--rw (otn-label-type)?
          +--:(tributary-port)
          |  +--rw tpn?   uint16
          +--:(tributary-slot)
             +--rw ts?    uint16
  augment /te:te/te:tunnels/te:tunnel/te:p2p-secondary-paths
          /te:p2p-secondary-path/te:path-in-segment/te:reverse
          /te:label-restrictions/te:label-restriction/te:label-end
          /te:te-label/te:technology:
    +--:(otn)
       +--rw (otn-label-type)?
          +--:(tributary-port)
          |  +--rw tpn?   uint16
          +--:(tributary-slot)
             +--rw ts?    uint16
  augment /te:te/te:tunnels/te:tunnel/te:p2p-secondary-paths
          /te:p2p-secondary-path/te:path-out-segment/te:forward
          /te:label-restrictions/te:label-restriction:
    +--rw range-type?   identityref
    +--rw tsg?          identityref
    +--rw priority?     uint8
  augment /te:te/te:tunnels/te:tunnel/te:p2p-secondary-paths
          /te:p2p-secondary-path/te:path-out-segment/te:forward
          /te:label-restrictions/te:label-restriction/te:label-start
          /te:te-label/te:technology:
    +--:(otn)
       +--rw (otn-label-type)?
          +--:(tributary-port)
          |  +--rw tpn?   uint16
          +--:(tributary-slot)
             +--rw ts?    uint16
  augment /te:te/te:tunnels/te:tunnel/te:p2p-secondary-paths
          /te:p2p-secondary-path/te:path-out-segment/te:forward
          /te:label-restrictions/te:label-restriction/te:label-end
          /te:te-label/te:technology:
    +--:(otn)
       +--rw (otn-label-type)?
          +--:(tributary-port)
          |  +--rw tpn?   uint16
          +--:(tributary-slot)
             +--rw ts?    uint16
  augment /te:te/te:tunnels/te:tunnel/te:p2p-secondary-paths
          /te:p2p-secondary-path/te:path-out-segment/te:reverse
          /te:label-restrictions/te:label-restriction:
    +--rw range-type?   identityref
    +--rw tsg?          identityref
    +--rw priority?     uint8
  augment /te:te/te:tunnels/te:tunnel/te:p2p-secondary-paths
          /te:p2p-secondary-path/te:path-out-segment/te:reverse
          /te:label-restrictions/te:label-restriction/te:label-start
          /te:te-label/te:technology:
    +--:(otn)
       +--rw (otn-label-type)?
          +--:(tributary-port)
          |  +--rw tpn?   uint16
          +--:(tributary-slot)
             +--rw ts?    uint16
  augment /te:te/te:tunnels/te:tunnel/te:p2p-secondary-paths
          /te:p2p-secondary-path/te:path-out-segment/te:reverse
          /te:label-restrictions/te:label-restriction/te:label-end
          /te:te-label/te:technology:
    +--:(otn)
       +--rw (otn-label-type)?
          +--:(tributary-port)
          |  +--rw tpn?   uint16
          +--:(tributary-slot)
             +--rw ts?    uint16
  augment /te:te/te:tunnels/te:tunnel/te:p2p-secondary-paths
          /te:p2p-secondary-path/te:state/te:path-properties
          /te:path-route-objects/te:path-computed-route-object
          /te:state/te:type/te:label/te:label-hop/te:te-label
          /te:technology:
    +--:(otn)
       +--ro tpn?       uint16
       +--ro tsg?       identityref
       +--ro ts-list?   string
  augment /te:te/te:tunnels/te:tunnel/te:p2p-secondary-paths
          /te:p2p-secondary-path/te:state/te:lsps/te:lsp
          /te:lsp-record-route-subobjects/te:record-route-subobject
          /te:type/te:label/te:label-hop/te:te-label/te:technology:
    +--:(otn)
       +--ro tpn?       uint16
       +--ro tsg?       identityref
       +--ro ts-list?   string
  augment /te:te/te:tunnels/te:tunnel/te:p2p-secondary-paths
          /te:p2p-secondary-path/te:state/te:lsps/te:lsp
          /te:path-properties/te:path-route-objects
          /te:path-computed-route-object/te:state/te:type/te:label
          /te:label-hop/te:te-label/te:technology:
    +--:(otn)
       +--ro tpn?       uint16
       +--ro tsg?       identityref
       +--ro ts-list?   string
  augment /te:te/te:lsps-state/te:lsp
          /te:lsp-record-route-subobjects/te:record-route-subobject
          /te:type/te:label/te:label-hop/te:te-label/te:technology:
    +--:(otn)
       +--ro tpn?       uint16
       +--ro tsg?       identityref
       +--ro ts-list?   string

  rpcs:
    +---x otn-te-tunnel-path-compute
       +---w input
       |  +---w request* [id]
       |     +---w id                     uint8
       |     +---w type?                  identityref
       |     +---w source?                inet:ip-address
       |     +---w destination?           inet:ip-address
       |     +---w src-tp-id?             binary
       |     +---w dst-tp-id?             binary
       |     +---w switching-layer?       identityref
       |     +---w encoding?              identityref
       |     +---w protection-type?       identityref
       |     +---w restoration-type?      identityref
       |     +---w provider-id?           te-types:te-global-id
       |     +---w client-id?             te-types:te-global-id
       |     +---w te-topology-id?        te-types:te-topology-id
       |     +---w setup-priority?        uint8
       |     +---w hold-priority?         uint8
       |     +---w te-path-metric-type?   identityref
       |     +---w odu-type?              identityref
       |     +---w p2p-primary-paths
       |     |  +---w p2p-primary-path* [name]
       |     |     +---w name                      string
       |     |     +---w te-default-metric?        uint32
       |     |     +---w te-delay-metric?          uint32
       |     |     +---w te-hop-metric?            uint32
       |     |     +---w explicit-route-objects
       |     |        +---w explicit-route-object* [index]
       |     |           +---w explicit-route-usage?   identityref
       |     |           +---w index                   uint32
       |     |           +---w (type)?
       |     |              +--:(num-unnum-hop)
       |     |              |  +---w num-unnum-hop
       |     |              |     +---w node-id?      te-types:te-node-id
       |     |              |     +---w link-tp-id?   te-types:te-tp-id
       |     |              |     +---w hop-type?     te-hop-type
       |     |              |     +---w direction?    te-link-direction
       |     |              +--:(as-number)
       |     |              |  +---w as-number-hop
       |     |              |     +---w as-number?   binary
       |     |              |     +---w hop-type?    te-hop-type
       |     |              +--:(label)
       |     |                 +---w label-hop
       |     |                    +---w te-label
       |     |                       +---w (technology)?
       |     |                       |  +--:(generic)
       |     |                       |  |  +---w generic?   rt-types:generalized-label
       |     |                       |  +--:(otn)
       |     |                       |     +---w tpn?       uint16
       |     |                       |     +---w tsg?       identityref
       |     |                       |     +---w ts-list?   string
       |     |                       +---w direction?       te-label-direction
       |     +---w p2p-secondary-paths
       |     |  +---w p2p-secondary-path* [name]
       |     |     +---w name                      string
       |     |     +---w te-default-metric?        uint32
       |     |     +---w te-delay-metric?          uint32
       |     |     +---w te-hop-metric?            uint32
       |     |     +---w explicit-route-objects
       |     |        +---w explicit-route-object* [index]
       |     |           +---w explicit-route-usage?   identityref
       |     |           +---w index                   uint32
       |     |           +---w (type)?
       |     |              +--:(num-unnum-hop)
       |     |              |  +---w num-unnum-hop
       |     |              |     +---w node-id?      te-types:te-node-id
       |     |              |     +---w link-tp-id?   te-types:te-tp-id
       |     |              |     +---w hop-type?     te-hop-type
       |     |              |     +---w direction?    te-link-direction
       |     |              +--:(as-number)
       |     |              |  +---w as-number-hop
       |     |              |     +---w as-number?   binary
       |     |              |     +---w hop-type?    te-hop-type
       |     |              +--:(label)
       |     |                 +---w label-hop
       |     |                    +---w te-label
       |     |                       +---w (technology)?
       |     |                       |  +--:(generic)
       |     |                       |  |  +---w generic?   rt-types:generalized-label
       |     |                       |  +--:(otn)
       |     |                       |     +---w tpn?       uint16
       |     |                       |     +---w tsg?       identityref
       |     |                       |     +---w ts-list?   string
       |     |                       +---w direction?       te-label-direction
       |     +---w src-client-signal?     identityref
       |     +---w src-tributary-slots
       |     |  +---w values*   uint8
       |     +---w dst-client-signal?     identityref
       |     +---w dst-tributary-slots
       |        +---w values*   uint8
       +--ro output
          +--ro return-code?   enumeration
          +--ro result* [id]
             +--ro id                     uint8
             +--ro p2p-primary-paths
             |  +--ro p2p-primary-path* [name]
             |     +--ro name                      string
             |     +--ro te-default-metric?        uint32
             |     +--ro te-delay-metric?          uint32
             |     +--ro te-hop-metric?            uint32
             |     +--ro explicit-route-objects
             |        +--ro explicit-route-object* [index]
             |           +--ro explicit-route-usage?   identityref
             |           +--ro index                   uint32
             |           +--ro (type)?
             |              +--:(num-unnum-hop)
             |              |  +--ro num-unnum-hop
             |              |     +--ro node-id?      te-types:te-node-id
             |              |     +--ro link-tp-id?   te-types:te-tp-id
             |              |     +--ro hop-type?     te-hop-type
             |              |     +--ro direction?    te-link-direction
             |              +--:(as-number)
             |              |  +--ro as-number-hop
             |              |     +--ro as-number?   binary
             |              |     +--ro hop-type?    te-hop-type
             |              +--:(label)
             |                 +--ro label-hop
             |                    +--ro te-label
             |                       +--ro (technology)?
             |                       |  +--:(generic)
             |                       |  |  +--ro generic?   rt-types:generalized-label
             |                       |  +--:(otn)
             |                       |     +--ro tpn?       uint16
             |                       |     +--ro tsg?       identityref
             |                       |     +--ro ts-list?   string
             |                       +--ro direction?       te-label-direction
             +--ro p2p-secondary-paths
                +--ro p2p-secondary-path* [name]
                   +--ro name                      string
                   +--ro te-default-metric?        uint32
                   +--ro te-delay-metric?          uint32
                   +--ro te-hop-metric?            uint32
                   +--ro explicit-route-objects
                      +--ro explicit-route-object* [index]
                         +--ro explicit-route-usage?   identityref
                         +--ro index                   uint32
                         +--ro (type)?
                            +--:(num-unnum-hop)
                            |  +--ro num-unnum-hop
                            |     +--ro node-id?      te-types:te-node-id
                            |     +--ro link-tp-id?   te-types:te-tp-id
                            |     +--ro hop-type?     te-hop-type
                            |     +--ro direction?    te-link-direction
                            +--:(as-number)
                            |  +--ro as-number-hop
                            |     +--ro as-number?   binary
                            |     +--ro hop-type?    te-hop-type
                            +--:(label)
                               +--ro label-hop
                                  +--ro te-label
                                     +--ro (technology)?
                                     |  +--:(generic)
                                     |  |  +--ro generic?   rt-types:generalized-label
                                     |  +--:(otn)
                                     |     +--ro tpn?       uint16
                                     |     +--ro tsg?       identityref
                                     |     +--ro ts-list?   string
                                     +--ro direction?       te-label-direction

5.  OTN Tunnel YANG Code

<CODE BEGINS>file "ietf-otn-tunnel@2018-06-30.yang" "ietf-otn-tunnel@2018-08-10.yang"
module ietf-otn-tunnel {
  yang-version 1.1;

  namespace "urn:ietf:params:xml:ns:yang:ietf-otn-tunnel";
  prefix "otn-tunnel";
  import ietf-te {
    prefix "te";
  }

  import ietf-otn-types {
    prefix "otn-types";
  }

  import ietf-te-types {
    prefix "te-types";
  }

  import ietf-inet-types {
    prefix "inet";
  }

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

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

     Editor: Aihua Guo
             <mailto:aihuaguo@huawei.com>

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

     Editor: Anurag Sharma
             <mailto:ansha@google.com>

     Editor: Rajan Rao
             <mailto:rrao@infinera.com>

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

     Editor: Victor Lopez
             <mailto:victor.lopezalvarez@telefonica.com>

     Editor: Yunbo Li
             <mailto:liyunbo@chinamobile.com>

     Editor: Yunbin Xu
             <mailto:xuyunbin@ritt.cn>";

  description
    "This module defines a model for OTN Tunnel Services.";

  revision "2018-07-02" "2018-08-10" {
    description
      "Revision 0.6"; 0.7";
    reference
      "draft-ietf-ccamp-otn-tunnel-model-03";
      "draft-ietf-ccamp-otn-tunnel-model-04";
  }

 /*
  * Groupings
  */

  grouping otn-tunnel-attributes {
    description "Parameters for OTN tunnel";

    leaf src-client-signal {
      type identityref {
        base otn-types:client-signal;
      }
      description
        "Client signal at the source endpoint of the tunnel";
    }

    leaf dst-client-signal {
      type identityref {
        base otn-types:client-signal;
      }
      description
        "Client signal at the destination endpoint of the tunnel";
    }

 }

 /*
  * Data nodes
  */

  augment "/te:te/te:tunnels/te:tunnel" {
    description
      "Augment with additional parameters required for OTN service";
    uses otn-tunnel-attributes;
  }

  /*
   * Augment TE bandwidth
   */
         /* Augment bandwidth of named-path-constraints */
  augment "/te:te/te:globals/te:named-path-constraints/"
        + "te:named-path-constraint/"
        + "te:te-bandwidth/te:technology" {
    description "OTN bandwidth.";
    case otn {
      uses otn-types:otn-path-bandwidth;
    }
  }

  /* Augment bandwdith of tunnel */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:te-bandwidth/te:technology" {
    description "OTN bandwidth.";
    case otn {
      uses otn-types:otn-path-bandwidth;
    }
  }

  /* Augment bandwidth of primary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-primary-paths/te:p2p-primary-path/"
        + "te:te-bandwidth/te:technology" {
    description "OTN bandwidth.";
    case otn {
      uses otn-types:otn-path-bandwidth;
    }
  }

  /* Augment bandwidth of reverse primary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-primary-paths/te:p2p-primary-path/"
        + "te:p2p-reverse-primary-path/"
        + "te:te-bandwidth/te:technology" {
    description "OTN bandwidth.";
    case otn {
      uses otn-types:otn-path-bandwidth;
    }
  }

  /* Augment bandwidht of secondary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-secondary-paths/te:p2p-secondary-path/"
        + "te:te-bandwidth/te:technology" {
    description "OTN bandwidth.";
    case otn {
      uses otn-types:otn-path-bandwidth;
    }

  }

  /*
   * Augment TE label.
   */

  /* Augment label hop of route-object-exclude-always of named-path-constraints */
  augment "/te:te/te:globals/te:named-path-constraints/"
        + "te:named-path-constraint/te:explicit-route-objects/"
        + "te:route-object-exclude-always/te:type/te:label/"
        + "te:label-hop/te:te-label/te:technology" {
    description "OTN label.";
    case otn {
      uses otn-types:otn-path-label;
    }
  }

  /* Augment label hop of route-object-include-exclude of named-path-constraints */
  augment "/te:te/te:globals/te:named-path-constraints/"
        + "te:named-path-constraint/te:explicit-route-objects/"
        + "te:route-object-include-exclude/te:type/te:label/"
        + "te:label-hop/te:te-label/te:technology" {
    description "OTN label.";
    case otn {
      uses otn-types:otn-path-label;
    }
  }

  /* Augment label restrictions for the forwarding direction of path-in-segment of named-path-constraints */
  augment "/te:te/te:globals/te:named-path-constraints/"
        + "te:named-path-constraint/te:path-in-segment/"
        + "te:forward/te:label-restrictions/"
        + "te:label-restriction" {
    description "OTN label.";
    uses otn-types:otn-label-restriction;
  }

  /* Augment label restrictions start for the forwarding direction of path-in-segment of named-path-constraints */
  augment "/te:te/te:globals/te:named-path-constraints/"
        + "te:named-path-constraint/te:path-in-segment/"
        + "te:forward/te:label-restrictions/"
        + "te:label-restriction/te:label-start/"
        + "te:te-label/te:technology" {
    description "OTN label.";
    case otn {
      uses otn-types:otn-link-label;
    }
  }
  /* Augment label restrictions end for the forwarding direction of path-in-segment of named-path-constraints */
  augment "/te:te/te:globals/te:named-path-constraints/"
        + "te:named-path-constraint/te:path-in-segment/"
        + "te:forward/te:label-restrictions/"
        + "te:label-restriction/te:label-end/"
        + "te:te-label/te:technology" {
    description "OTN label.";
    case otn {
      uses otn-types:otn-link-label;
    }
  }

  /* Augment label restrictions for the reverse direction of path-in-segment of named-path-constraints */
  augment "/te:te/te:globals/te:named-path-constraints/"
        + "te:named-path-constraint/te:path-in-segment/"
        + "te:reverse/te:label-restrictions/"
        + "te:label-restriction" {
    description "OTN label.";
    uses otn-types:otn-label-restriction;
  }

  /* Augment label restrictions start for the reverse direction of path-in-segment of named-path-constraints */
  augment "/te:te/te:globals/te:named-path-constraints/"
        + "te:named-path-constraint/te:path-in-segment/"
        + "te:reverse/te:label-restrictions/"
        + "te:label-restriction/te:label-start/"
        + "te:te-label/te:technology" {
    description "OTN label.";
    case otn {
      uses otn-types:otn-link-label;
    }
  }

  /* Augment label restrictions end for the reverse direction of path-in-segment of named-path-constraints */
  augment "/te:te/te:globals/te:named-path-constraints/"
        + "te:named-path-constraint/te:path-in-segment/"
        + "te:reverse/te:label-restrictions/"
        + "te:label-restriction/te:label-end/"
        + "te:te-label/te:technology" {
    description "OTN label.";
    case otn {
      uses otn-types:otn-link-label;
    }
  }

  /* Augment label restrictions for the forwarding direction of path-out-segment of named-path-constraints */
  augment "/te:te/te:globals/te:named-path-constraints/"
        + "te:named-path-constraint/te:path-out-segment/"
        + "te:forward/te:label-restrictions/"
        + "te:label-restriction" {
    description "OTN label.";
    uses otn-types:otn-label-restriction;
  }
  /* Augment label restrictions start for the forwarding direction of path-out-segment of named-path-constraints */
  augment "/te:te/te:globals/te:named-path-constraints/"
        + "te:named-path-constraint/te:path-out-segment/"
        + "te:forward/te:label-restrictions/"
        + "te:label-restriction/te:label-start/"
        + "te:te-label/te:technology" {
    description "OTN label.";
    case otn {
      uses otn-types:otn-link-label;
    }
  }

  /* Augment label restrictions end for the forwarding direction of path-out-segment of named-path-constraints */
  augment "/te:te/te:globals/te:named-path-constraints/"
        + "te:named-path-constraint/te:path-out-segment/"
        + "te:forward/te:label-restrictions/"
        + "te:label-restriction/te:label-end/"
        + "te:te-label/te:technology" {
    description "OTN label.";
    case otn {
      uses otn-types:otn-link-label;
    }
  }

  /* Augment label restrictions for the reverse direction of path-out-segment of named-path-constraints */
  augment "/te:te/te:globals/te:named-path-constraints/"
        + "te:named-path-constraint/te:path-out-segment/"
        + "te:reverse/te:label-restrictions/"
        + "te:label-restriction" {
    description "OTN label.";
    uses otn-types:otn-label-restriction;
  }

  /* Augment label restrictions start for the reverse direction of path-out-segment of named-path-constraints */
  augment "/te:te/te:globals/te:named-path-constraints/"
        + "te:named-path-constraint/te:path-out-segment/"
        + "te:reverse/te:label-restrictions/"
        + "te:label-restriction/te:label-start/"
        + "te:te-label/te:technology" {
    description "OTN label.";
    case otn {
      uses otn-types:otn-link-label;
    }

  }

  /* Augment label restrictions end for the reverse direction of path-out-segment of named-path-constraints */
  augment "/te:te/te:globals/te:named-path-constraints/"
        + "te:named-path-constraint/te:path-out-segment/"
        + "te:reverse/te:label-restrictions/"
        + "te:label-restriction/te:label-end/"
        + "te:te-label/te:technology" {
    description "OTN label.";
    case otn {
      uses otn-types:otn-link-label;
    }
  }

  /* Augment label hop of route-exclude of primary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-primary-paths/te:p2p-primary-path/"
        + "te:optimizations/te:algorithm/te:metric/"
        + "te:optimization-metric/te:explicit-route-exclude-objects/"
        + "te:route-object-exclude-object/te:type/te:label/"
        + "te:label-hop/te:te-label/te:technology" {
    description "OTN label.";
    case otn {
      uses otn-types:otn-path-label;
    }
  }

  /* Augment label hop of route-include of primary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-primary-paths/te:p2p-primary-path/"
        + "te:optimizations/te:algorithm/te:metric/"
        + "te:optimization-metric/te:explicit-route-include-objects/"
        + "te:route-object-include-object/te:type/te:label/"
        + "te:label-hop/te:te-label/te:technology" {
    description "OTN label.";
    case otn {
      uses otn-types:otn-path-label;
    }
  }

  /* Augment label hop of route-object-exclude-always of primary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-primary-paths/te:p2p-primary-path/"
        + "te:explicit-route-objects/"
        + "te:route-object-exclude-always/te:type/te:label/"
        + "te:label-hop/te:te-label/te:technology" {
    description "OTN label.";
    case otn {
      uses otn-types:otn-path-label;
    }
  }

  /* Augment label hop of route-object-include-exclude of primary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-primary-paths/te:p2p-primary-path/"
        + "te:explicit-route-objects/"
        + "te:route-object-include-exclude/te:type/te:label/"
        + "te:label-hop/te:te-label/te:technology" {
    description "OTN label.";
    case otn {
      uses otn-types:otn-path-label;
    }
  }

  /* Augment label restrictions for the forwarding direction of path-in-segment of primary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-primary-paths/te:p2p-primary-path/"
        + "te:path-in-segment/te:forward/te:label-restrictions/"
        + "te:label-restriction" {
    description "OTN label.";
    uses otn-types:otn-label-restriction;
  }

  /* Augment label restrictions start for the forwarding direction of path-in-segment of primary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-primary-paths/te:p2p-primary-path/"
        + "te:path-in-segment/te:forward/te:label-restrictions/"
        + "te:label-restriction/te:label-start/"
        + "te:te-label/te:technology" {
    description "OTN label.";
    case otn {
      uses otn-types:otn-link-label;
    }
  }

  /* Augment label restrictions end for the forwarding direction of path-in-segment of primary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-primary-paths/te:p2p-primary-path/"
        + "te:path-in-segment/te:forward/te:label-restrictions/"
        + "te:label-restriction/te:label-end/"
        + "te:te-label/te:technology" {
    description "OTN label.";
    case otn {
      uses otn-types:otn-link-label;
    }
  }
  /* Augment label restrictions for the reverse direction of path-in-segment of primary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-primary-paths/te:p2p-primary-path/"
        + "te:path-in-segment/te:reverse/te:label-restrictions/"
        + "te:label-restriction" {
    description "OTN label.";
    uses otn-types:otn-label-restriction;
  }

  /* Augment label restrictions start for the reverse direction of path-in-segment of primary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-primary-paths/te:p2p-primary-path/"
        + "te:path-in-segment/te:reverse/te:label-restrictions/"
        + "te:label-restriction/te:label-start/"
        + "te:te-label/te:technology" {
    description "OTN label.";
    case otn {
      uses otn-types:otn-link-label;
    }
  }

  /* Augment label restrictions end for the reverse direction of path-in-segment of primary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-primary-paths/te:p2p-primary-path/"
        + "te:path-in-segment/te:reverse/te:label-restrictions/"
        + "te:label-restriction/te:label-end/"
        + "te:te-label/te:technology" {
    description "OTN label.";
    case otn {
      uses otn-types:otn-link-label;
    }
  }

  /* Augment label restrictions for the forwarding direction of path-out-segment of primary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-primary-paths/te:p2p-primary-path/"
        + "te:path-out-segment/te:forward/te:label-restrictions/"
        + "te:label-restriction" {
    description "OTN label.";
    uses otn-types:otn-label-restriction;
  }

  /* Augment label restrictions start for the forwarding direction of path-out-segment of primary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-primary-paths/te:p2p-primary-path/"
        + "te:path-out-segment/te:forward/te:label-restrictions/"
        + "te:label-restriction/te:label-start/"
        + "te:te-label/te:technology" {

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

  /* Augment label restrictions end for the forwarding direction of path-out-segment of primary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-primary-paths/te:p2p-primary-path/"
        + "te:path-out-segment/te:forward/te:label-restrictions/"
        + "te:label-restriction/te:label-end/"
        + "te:te-label/te:technology" {
    description "OTN label.";
    case otn {
      uses otn-types:otn-link-label;
    }
  }

  /* Augment label restrictions for the reverse direction of path-out-segment of primary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-primary-paths/te:p2p-primary-path/"
        + "te:path-out-segment/te:reverse/te:label-restrictions/"
        + "te:label-restriction" {
    description "OTN label.";
    uses otn-types:otn-label-restriction;
  }

  /* Augment label restrictions start for the reverse direction of path-out-segment of primary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-primary-paths/te:p2p-primary-path/"
        + "te:path-out-segment/te:reverse/te:label-restrictions/"
        + "te:label-restriction/te:label-start/"
        + "te:te-label/te:technology" {
    description "OTN label.";
    case otn {
      uses otn-types:otn-link-label;
    }
  }

  /* Augment label restrictions end for the reverse direction of path-out-segment of primary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-primary-paths/te:p2p-primary-path/"
        + "te:path-out-segment/te:reverse/te:label-restrictions/"
        + "te:label-restriction/te:label-end/"
        + "te:te-label/te:technology" {
    description "OTN label.";
    case otn {
      uses otn-types:otn-link-label;

    }
  }

  /* Augment label hop of path-route of primary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-primary-paths/te:p2p-primary-path/"
        + "te:state/te:path-properties/"
        + "te:path-route-objects/te:path-computed-route-object/"
        + "te:state/te:type/te:label/"
        + "te:label-hop/te:te-label/te:technology" {
    description "OTN label.";
    case otn {
      uses otn-types:otn-path-label;
    }
  }

  /* Augment label hop of record-route of primary LSP */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-primary-paths/te:p2p-primary-path/"
        + "te:state/te:lsps/te:lsp/te:lsp-record-route-subobjects/"
        + "te:record-route-subobject/te:type/te:label/"
        + "te:label-hop/te:te-label/te:technology" {
    description "OTN label.";
    case otn {
      uses otn-types:otn-path-label;
    }
  }

  /* Augment label hop of path-route of primary LSP */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-primary-paths/te:p2p-primary-path/"
        + "te:state/te:lsps/te:lsp/te:path-properties/"
        + "te:path-route-objects/te:path-computed-route-object/"
        + "te:state/te:type/te:label/"
        + "te:label-hop/te:te-label/te:technology" {
    description "OTN label.";
    case otn {
      uses otn-types:otn-path-label;
    }
  }

  /* Augment label hop of route-exclude of reverse primary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-primary-paths/te:p2p-primary-path/"
        + "te:p2p-reverse-primary-path/"
        + "te:optimizations/te:algorithm/te:metric/"
        + "te:optimization-metric/te:explicit-route-exclude-objects/"
        + "te:route-object-exclude-object/te:type/te:label/"
        + "te:label-hop/te:te-label/te:technology" {
    description "OTN label.";
    case otn {
      uses otn-types:otn-path-label;
    }
  }

  /* Augment label hop of route-include of reverse primary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-primary-paths/te:p2p-primary-path/"
        + "te:p2p-reverse-primary-path/"
        + "te:optimizations/te:algorithm/te:metric/"
        + "te:optimization-metric/te:explicit-route-include-objects/"
        + "te:route-object-include-object/te:type/te:label/"
        + "te:label-hop/te:te-label/te:technology" {
    description "OTN label.";
    case otn {
      uses otn-types:otn-path-label;
    }
  }

  /* Augment label hop of route-object-exclude-always of reverse primary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-primary-paths/te:p2p-primary-path/"
        + "te:p2p-reverse-primary-path/"
        + "te:explicit-route-objects/"
        + "te:route-object-exclude-always/"
        + "te:type/te:label/"
        + "te:label-hop/te:te-label/te:technology" {
    description "OTN label.";
    case otn {
      uses otn-types:otn-path-label;
    }
  }

  /* Augment label hop of route-object-include-exclude of reverse primary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-primary-paths/te:p2p-primary-path/"
        + "te:p2p-reverse-primary-path/"
        + "te:explicit-route-objects/"
        + "te:route-object-include-exclude/"
        + "te:type/te:label/"
        + "te:label-hop/te:te-label/te:technology" {
    description "OTN label.";
    case otn {
      uses otn-types:otn-path-label;
    }
  }
  /* Augment label restrictions for the forwarding direction of path-in-segment of reverse primary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-primary-paths/te:p2p-primary-path/"
        + "te:p2p-reverse-primary-path/"
        + "te:path-in-segment/te:forward/te:label-restrictions/"
        + "te:label-restriction" {
    description "OTN label.";
    uses otn-types:otn-label-restriction;
  }

  /* Augment label restrictions start for the forwarding direction of path-in-segment of reverse primary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-primary-paths/te:p2p-primary-path/"
        + "te:p2p-reverse-primary-path/"
        + "te:path-in-segment/te:forward/te:label-restrictions/"
        + "te:label-restriction/te:label-start/"
        + "te:te-label/te:technology" {
    description "OTN label.";
    case otn {
      uses otn-types:otn-link-label;
    }
  }

  /* Augment label restrictions end for the forwarding direction of path-in-segment of reverse primary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-primary-paths/te:p2p-primary-path/"
        + "te:p2p-reverse-primary-path/"
        + "te:path-in-segment/te:forward/te:label-restrictions/"
        + "te:label-restriction/te:label-end/"
        + "te:te-label/te:technology" {
    description "OTN label.";
    case otn {
      uses otn-types:otn-link-label;
    }
  }

  /* Augment label restrictions for the reverse direction of path-in-segment of reverse primary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-primary-paths/te:p2p-primary-path/"
        + "te:p2p-reverse-primary-path/"
        + "te:path-in-segment/te:reverse/te:label-restrictions/"
        + "te:label-restriction" {
    description "OTN label.";
    uses otn-types:otn-label-restriction;
  }

  /* Augment label restrictions start for the reverse direction of path-in-segment of reverse primary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-primary-paths/te:p2p-primary-path/"
        + "te:p2p-reverse-primary-path/"
        + "te:path-in-segment/te:reverse/te:label-restrictions/"
        + "te:label-restriction/te:label-start/"
        + "te:te-label/te:technology" {
    description "OTN label.";
    case otn {
      uses otn-types:otn-link-label;
    }
  }

  /* Augment label restrictions end for the reverse direction of path-in-segment of reverse primary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-primary-paths/te:p2p-primary-path/"
        + "te:p2p-reverse-primary-path/"
        + "te:path-in-segment/te:reverse/te:label-restrictions/"
        + "te:label-restriction/te:label-end/"
        + "te:te-label/te:technology" {
    description "OTN label.";
    case otn {
      uses otn-types:otn-link-label;
    }
  }

  /* Augment label restrictions for the forwarding direction of path-out-segment of reverse primary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-primary-paths/te:p2p-primary-path/"
        + "te:p2p-reverse-primary-path/"
        + "te:path-out-segment/te:forward/te:label-restrictions/"
        + "te:label-restriction" {
    description "OTN label.";
    uses otn-types:otn-label-restriction;
  }

  /* Augment label restrictions start for the forwarding direction of path-out-segment of reverse primary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-primary-paths/te:p2p-primary-path/"
        + "te:p2p-reverse-primary-path/"
        + "te:path-out-segment/te:forward/te:label-restrictions/"
        + "te:label-restriction/te:label-start/"
        + "te:te-label/te:technology" {
    description "OTN label.";
    case otn {
      uses otn-types:otn-link-label;
    }
  }

  /* Augment label restrictions end for the forwarding direction of path-out-segment of reverse primary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-primary-paths/te:p2p-primary-path/"
        + "te:p2p-reverse-primary-path/"
        + "te:path-out-segment/te:forward/te:label-restrictions/"
        + "te:label-restriction/te:label-end/"
        + "te:te-label/te:technology" {
    description "OTN label.";
    case otn {
      uses otn-types:otn-link-label;
    }
  }

  /* Augment label restrictions for the reverse direction of path-out-segment of reverse primary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-primary-paths/te:p2p-primary-path/"
        + "te:p2p-reverse-primary-path/"
        + "te:path-out-segment/te:reverse/te:label-restrictions/"
        + "te:label-restriction" {
    description "OTN label.";
    uses otn-types:otn-label-restriction;
  }

  /* Augment label restrictions start for the reverse direction of path-out-segment of reverse primary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-primary-paths/te:p2p-primary-path/"
        + "te:p2p-reverse-primary-path/"
        + "te:path-out-segment/te:reverse/te:label-restrictions/"
        + "te:label-restriction/te:label-start/"
        + "te:te-label/te:technology" {
    description "OTN label.";
    case otn {
      uses otn-types:otn-link-label;
    }
  }

  /* Augment label restrictions end for the reverse direction of path-out-segment of reverse primary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-primary-paths/te:p2p-primary-path/"
        + "te:p2p-reverse-primary-path/"
        + "te:path-out-segment/te:reverse/te:label-restrictions/"
        + "te:label-restriction/te:label-end/"
        + "te:te-label/te:technology" {
    description "OTN label.";
    case otn {
      uses otn-types:otn-link-label;
    }
  }
  /* Augment label hop of path-route of reverse primary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-primary-paths/te:p2p-primary-path/"
        + "te:p2p-reverse-primary-path/"
        + "te:state/te:path-properties/"
        + "te:path-route-objects/te:path-computed-route-object/"
        + "te:state/te:type/te:label/"
        + "te:label-hop/te:te-label/te:technology" {
    description "OTN label.";
    case otn {
      uses otn-types:otn-path-label;
    }
  }

  /* Augment label hop of record-route of reverse primary LSP */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-primary-paths/te:p2p-primary-path/"
        + "te:p2p-reverse-primary-path/"
        + "te:state/te:lsps/te:lsp/te:lsp-record-route-subobjects/"
        + "te:record-route-subobject/te:type/te:label/"
        + "te:label-hop/te:te-label/te:technology" {
    description "OTN label.";
    case otn {
      uses otn-types:otn-path-label;
    }
  }

  /* Augment label hop of path-route of reverse primary LSP */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-primary-paths/te:p2p-primary-path/"
        + "te:p2p-reverse-primary-path/"
        + "te:state/te:lsps/te:lsp/te:path-properties/"
        + "te:path-route-objects/te:path-computed-route-object/"
        + "te:state/te:type/te:label/"
        + "te:label-hop/te:te-label/te:technology" {
    description "OTN label.";
    case otn {
      uses otn-types:otn-path-label;
    }
  }

  /* Augment label hop of route-exclude of secondary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-secondary-paths/te:p2p-secondary-path/"
        + "te:optimizations/te:algorithm/te:metric/"
        + "te:optimization-metric/te:explicit-route-exclude-objects/"
        + "te:route-object-exclude-object/te:type/te:label/"
        + "te:label-hop/te:te-label/te:technology" {

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

  /* Augment label hop of route-include of secondary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-secondary-paths/te:p2p-secondary-path/"
        + "te:optimizations/te:algorithm/te:metric/"
        + "te:optimization-metric/te:explicit-route-include-objects/"
        + "te:route-object-include-object/te:type/te:label/"
        + "te:label-hop/te:te-label/te:technology" {
    description "OTN label.";
    case otn {
      uses otn-types:otn-path-label;
    }
  }

  /* Augment label hop of route-object-exclude-always of secondary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-secondary-paths/te:p2p-secondary-path/"
        + "te:explicit-route-objects/"
        + "te:route-object-exclude-always/te:type/te:label/"
        + "te:label-hop/te:te-label/te:technology" {
    description "OTN label.";
    case otn {
      uses otn-types:otn-path-label;
    }
  }

  /* Augment label hop of route-object-include-exclude of secondary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-secondary-paths/te:p2p-secondary-path/"
        + "te:explicit-route-objects/"
        + "te:route-object-include-exclude/te:type/te:label/"
        + "te:label-hop/te:te-label/te:technology" {
    description "OTN label.";
    case otn {
      uses otn-types:otn-path-label;
    }
  }

  /* Augment label restrictions for the forwarding direction of path-in-segment of secondary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-secondary-paths/te:p2p-secondary-path/"
        + "te:path-in-segment/te:forward/te:label-restrictions/"
        + "te:label-restriction" {

    description "OTN label.";
    uses otn-types:otn-label-restriction;
  }

  /* Augment label restrictions start for the forwarding direction of path-in-segment of secondary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-secondary-paths/te:p2p-secondary-path/"
        + "te:path-in-segment/te:forward/te:label-restrictions/"
        + "te:label-restriction/te:label-start/"
        + "te:te-label/te:technology" {
    description "OTN label.";
    case otn {
      uses otn-types:otn-link-label;
    }
  }

  /* Augment label restrictions end for the forwarding direction of path-in-segment of secondary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-secondary-paths/te:p2p-secondary-path/"
        + "te:path-in-segment/te:forward/te:label-restrictions/"
        + "te:label-restriction/te:label-end/"
        + "te:te-label/te:technology" {
    description "OTN label.";
    case otn {
      uses otn-types:otn-link-label;
    }
  }

  /* Augment label restrictions for the reverse direction of path-in-segment of secondary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-secondary-paths/te:p2p-secondary-path/"
        + "te:path-in-segment/te:reverse/te:label-restrictions/"
        + "te:label-restriction" {
    description "OTN label.";
    uses otn-types:otn-label-restriction;
  }

  /* Augment label restrictions start for the reverse direction of path-in-segment of secondary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-secondary-paths/te:p2p-secondary-path/"
        + "te:path-in-segment/te:reverse/te:label-restrictions/"
        + "te:label-restriction/te:label-start/"
        + "te:te-label/te:technology" {
    description "OTN label.";
    case otn {
      uses otn-types:otn-link-label;
    }
  }
  /* Augment label restrictions end for the reverse direction of path-in-segment of secondary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-secondary-paths/te:p2p-secondary-path/"
        + "te:path-in-segment/te:reverse/te:label-restrictions/"
        + "te:label-restriction/te:label-end/"
        + "te:te-label/te:technology" {
    description "OTN label.";
    case otn {
      uses otn-types:otn-link-label;
    }
  }

  /* Augment label restrictions for the forwarding direction of path-out-segment of secondary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-secondary-paths/te:p2p-secondary-path/"
        + "te:path-out-segment/te:forward/te:label-restrictions/"
        + "te:label-restriction" {
    description "OTN label.";
    uses otn-types:otn-label-restriction;
  }

  /* Augment label restrictions start for the forwarding direction of path-out-segment of secondary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-secondary-paths/te:p2p-secondary-path/"
        + "te:path-out-segment/te:forward/te:label-restrictions/"
        + "te:label-restriction/te:label-start/"
        + "te:te-label/te:technology" {
    description "OTN label.";
    case otn {
      uses otn-types:otn-link-label;
    }
  }

  /* Augment label restrictions end for the forwarding direction of path-out-segment of secondary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-secondary-paths/te:p2p-secondary-path/"
        + "te:path-out-segment/te:forward/te:label-restrictions/"
        + "te:label-restriction/te:label-end/"
        + "te:te-label/te:technology" {
    description "OTN label.";
    case otn {
      uses otn-types:otn-link-label;
    }
  }

  /* Augment label restrictions for the reverse direction of path-out-segment of secondary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-secondary-paths/te:p2p-secondary-path/"
        + "te:path-out-segment/te:reverse/te:label-restrictions/"
        + "te:label-restriction" {
    description "OTN label.";
    uses otn-types:otn-label-restriction;
  }

  /* Augment label restrictions start for the reverse direction of path-out-segment of secondary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-secondary-paths/te:p2p-secondary-path/"
        + "te:path-out-segment/te:reverse/te:label-restrictions/"
        + "te:label-restriction/te:label-start/"
        + "te:te-label/te:technology" {
    description "OTN label.";
    case otn {
      uses otn-types:otn-link-label;
    }
  }

  /* Augment label restrictions end for the reverse direction of path-out-segment of secondary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-secondary-paths/te:p2p-secondary-path/"
        + "te:path-out-segment/te:reverse/te:label-restrictions/"
        + "te:label-restriction/te:label-end/"
        + "te:te-label/te:technology" {
    description "OTN label.";
    case otn {
      uses otn-types:otn-link-label;
    }
  }

  /* Augment label hop of path-route of secondary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-secondary-paths/te:p2p-secondary-path/"
        + "te:state/te:path-properties/te:path-route-objects/"
        + "te:path-computed-route-object/te:state/te:type/te:label/"
        + "te:label-hop/te:te-label/te:technology" {
    description "OTN label.";
    case otn {
      uses otn-types:otn-path-label;
    }
  }

  /* Augment label hop of record-route of secondary LSP */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-secondary-paths/te:p2p-secondary-path/"
        + "te:state/te:lsps/te:lsp/te:lsp-record-route-subobjects/"
        + "te:record-route-subobject/te:type/te:label/"
        + "te:label-hop/te:te-label/te:technology" {

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

  /* Augment label hop of path-route of secondary LSP */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-secondary-paths/te:p2p-secondary-path/"
        + "te:state/te:lsps/te:lsp/te:path-properties/"
        + "te:path-route-objects/"
        + "te:path-computed-route-object/te:state/te:type/te:label/"
        + "te:label-hop/te:te-label/te:technology" {
    description "OTN label.";
    case otn {
      uses otn-types:otn-path-label;
    }
  }

  /* Augment label hop of record-route of LSP */
  augment "/te:te/te:lsps-state/"
        + "te:lsp/te:lsp-record-route-subobjects/"
        + "te:record-route-subobject/te:type/te:label/"
        + "te:label-hop/te:te-label/te:technology" {
    description "OTN label.";
    case otn {
      uses otn-types:otn-path-label;
    }
  }

  grouping p2p-path-ero {
    description
      "TE tunnel ERO configuration grouping";

    leaf te-default-metric {
      type uint32;
      description
        "Traffic engineering metric.";
    }
    leaf te-delay-metric {
      type uint32;
      description
        "Traffic engineering delay metric.";
    }
    leaf te-hop-metric {
      type uint32;
      description
        "Traffic engineering hop metric.";

    }
    container explicit-route-objects {
      description "Explicit route objects container";
      list explicit-route-object {
        key "index";
        description
          "List of explicit route objects";
        leaf explicit-route-usage {
          type identityref {
            base te-types:route-usage-type;
          }
          description "An explicit-route hop action.";
        }
        uses te-types:explicit-route-hop {
                  augment "type/label/label-hop/te-label/technology" {
                    description "OTN label.";
            case otn {
                  uses otn-types:otn-path-label;
                }
                  }
                }
      }
    }
  }

  rpc otn-te-tunnel-path-compute {
    description "OTN TE tunnel path computation";
    input {
      list request {
        key "id";
        description "A list of path computation requests.";

        leaf id {
          type uint8;
          description
            "Request ID.";
        }
        leaf type {
          type identityref {
            base te-types:tunnel-type;
          }
          description "TE tunnel type.";
        }
        leaf source {
          type inet:ip-address;
          description
            "TE tunnel source address.";
        }
        leaf destination {
          type inet:ip-address;
          description
            "TE tunnel destination address";
        }
        leaf src-tp-id {
          type binary;
          description
            "TE tunnel source termination point identifier.";
        }
        leaf dst-tp-id {
          type binary;
          description
            "TE tunnel destination termination point identifier.";
        }
        leaf switching-layer {
          type identityref {
            base te-types:switching-capabilities;
          }
          description
            "Switching layer where the requests are computed.";
        }
        leaf encoding {
          type identityref {
            base te-types:lsp-encoding-types;
          }
          description "LSP encoding type";
        }
        leaf protection-type {
          type identityref {
            base te-types:lsp-protection-type;
          }
          description "LSP protection type";
        }
        leaf restoration-type {
          type identityref {
            base te-types:lsp-restoration-type;
          }
          description "LSP restoration type";
        }
        leaf provider-id {
          type te-types:te-global-id;
          description
            "An identifier to uniquely identify a provider.";
        }
        leaf client-id {
          type te-types:te-global-id;
          description
            "An identifier to uniquely identify a client.";
        }
        leaf te-topology-id {
          type te-types:te-topology-id;
          description
            "It is presumed that a datastore will contain many
             topologies. To distinguish between topologies it is
             vital to have UNIQUE topology identifiers.";
        }
        leaf setup-priority {
          type uint8 {
            range "0..7";
          }
          description
            "TE LSP setup priority";
        }
        leaf hold-priority {
          type uint8 {
            range "0..7";
          }
          description
            "TE LSP hold priority";
        }
        leaf te-path-metric-type {
          type identityref {
            base te-types:path-metric-type;
          }
          default te-types:path-metric-te;
          description
            "The tunnel path metric type.";
        }

        leaf odu-type {
          type identityref{
            base otn-types:tributary-protocol-type; otn-types:odu-type;
          }
          description "Type of ODU";
        }
        container p2p-primary-paths {
          description "Set of P2P primary paths container";
          list p2p-primary-path {
            key "name";
            description
              "List of primary paths for this tunnel.";
            leaf name {
              type string;
              description "TE path name";
            }
            uses p2p-path-ero;
          }
        }
        container p2p-secondary-paths {
          description "Set of P2P secondary paths container";
          list p2p-secondary-path {
            key "name";
            description
              "List of secondary paths for this tunnel.";
            leaf name {
              type string;
              description "TE path name";
            }
            uses p2p-path-ero;
          }
        }
        uses otn-tunnel-attributes;
      }
    }
    output {
      leaf return-code {
        type enumeration {
          enum success {
            description "success";
          }
          enum aborted {
            description "aborted";
          }
          enum destination-not-found {
            description "destination-not-found";
          }
          enum invalid-argument {
            description "invalid-argument";
          }
          enum no-memory {
            description "no-memory";
          }
          enum no-path-found {
            description "no-path-found";
          }
          enum other-error {
            description "other-error";
          }
          enum some-path-not-found {
            description "some-path-not-found";
          }
          enum source-not-found {
            description "source-not-found";

          }
          enum topology-error {
            description "topology-error";
          }
        }
        description
          "Return code";
      }
      list result {
        key "id";
        description
          "A list of results for all requests.";

        leaf id {
          type uint8;
          description
            "Request ID";
        }
        container p2p-primary-paths {
          description "Set of P2P primary paths container";
          list p2p-primary-path {
            key "name";
            description
              "List of resultant primary paths for this tunnel.";
            leaf name {
              type string;
              description "TE path name";
            }
            uses p2p-path-ero;
          }
        }
        container p2p-secondary-paths {
          description "Set of P2P secondary paths container";
          list p2p-secondary-path {
            key "name";
            description
              "List of resultant secondary paths for this tunnel.";
            leaf name {
              type string;
              description "TE path name";
            }
            uses p2p-path-ero;
          }
        }
      }
    }
  }
}
<CODE ENDS>

6.  OTN Types YANG Code

<CODE BEGINS> file "ietf-otn-types@2018-06-30.yang" "ietf-otn-types@2018-08-10.yang"

module ietf-otn-types {
  namespace "urn:ietf:params:xml:ns:yang:ietf-otn-types";
  prefix "otn-types";

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

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

     Editor: Aihua Guo
             <mailto:aihuaguo@huawei.com>

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

     Editor: Anurag Sharma
             <mailto:ansha@google.com>

     Editor: Rajan Rao
             <mailto:rrao@infinera.com>

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

     Editor: Victor Lopez
             <mailto:victor.lopezalvarez@telefonica.com>

     Editor: Yunbo Li
             <mailto:liyunbo@chinamobile.com>

     Editor: Yunbin Xu
             <mailto:xuyunbin@ritt.cn>";

  description
    "This module defines OTN types.";

  revision "2018-06-30" "2018-08-10" {
    description
      "Revision 0.6"; 0.8";
    reference
      "draft-ietf-ccamp-otn-tunnel-model-03";
      "draft-ietf-ccamp-otn-tunnel-model-04";
  }

  identity tributary-slot-granularity {
    description
      "Tributary slot granularity";
    reference
      "G.709/Y.1331, February 2016: Interfaces for the Optical
       Transport Network (OTN)";
  }

  identity tsg-1.25G {
    base tributary-slot-granularity;
    description
      "1.25G tributary slot granularity";
  }

  identity tsg-2.5G {
    base tributary-slot-granularity;
    description
      "2.5G tributary slot granularity";
  }
/*
  identity tsg-1.25Gand2.5G {
    base tributary-slot-granularity;
    description
      "Both 1.25G and 2.5G tributary slot granularity";
  }
*/
/*
Note: suggest to replace the term 'tributary-protocol-type' with
'odu-type', to avoid misleading.
*/

  identity tributary-protocol-type odu-type {
    description
      "Base identity for protocol framing used by tributary signals";
  }

/*
Note: suggest to remove all the prot-OTUx
*/

  identity prot-OTU1 {
    base tributary-protocol-type;
    description
      "OTU1 protocol (2.66G)";
  }

/*
  identity prot-OTU1e {
    base tributary-protocol-type;
    description
      "OTU1e type (11.04G)";
  }

  identity prot-OTU1f {
    base tributary-protocol-type;
    description
      "OTU1f type (11.27G)";
  }
*/
  identity prot-OTU2 {
    base tributary-protocol-type;
    description
      "OTU2 type (10.70G)";
  }

  identity prot-OTU2e {
    base tributary-protocol-type;
    description
      "OTU2e type (11.09G)";
  }
/*
  identity prot-OTU2f {
    base tributary-protocol-type;
    description
      "OTU2f type (11.31G)";
  }
*/
  identity prot-OTU3 {
    base tributary-protocol-type;
    description
      "OTU3 type (43.01G)";
  }
/*
  identity prot-OTU3e1 {
    base tributary-protocol-type;
    description
      "OTU3e1 type (44.57G)";
  }

  identity prot-OTU3e2 {
    base tributary-protocol-type;
    description
      "OTU3e2 type (44.58G)";
  }

*/
  identity prot-OTU4 {
    base tributary-protocol-type;
    description
      "OTU4 type (111.80G)";
  }

  identity prot-OTUCn {
    base tributary-protocol-type;
    description
      "OTUCn type (beyond 100G)";
  }

/*
Note: suggest to rename the term, remove the prefix 'prot-'.
*/

  identity prot-ODU0 ODU0 {
    base tributary-protocol-type; odu-type;
    description
      "ODU0 protocol (1.24G)";
  }

  identity prot-ODU1 ODU1 {
    base tributary-protocol-type; odu-type;
    description
      "ODU1 protocol (2.49G)";
  }
/*
  identity prot-ODU1e ODU1e {
    base tributary-protocol-type; odu-type;
    description
      "ODU1e protocol (10.35G).";
  }

  identity prot-ODU1f ODU1f {
    base tributary-protocol-type; odu-type;
    description
      "ODU1f protocol (10.56G).";
  }
*/
  identity prot-ODU2 ODU2 {
    base tributary-protocol-type; odu-type;
    description
      "ODU2 protocol (10.03G)";
  }

  identity prot-ODU2e ODU2e {
    base tributary-protocol-type; odu-type;
    description
      "ODU2e protocol (10.39G)";
  }
/*
  identity prot-ODU2f ODU2f {
    base tributary-protocol-type; odu-type;
    description
      "ODU2f protocol (10.60G).";
  }
*/
  identity prot-ODU3 ODU3 {
    base tributary-protocol-type; odu-type;
    description
      "ODU3 protocol (40.31G)";
  }
/*
  identity prot-ODU3e1 ODU3e1 {
    base tributary-protocol-type; odu-type;
    description
      "ODU3e1 protocol (41.77G).";
  }

  identity prot-ODU3e2 ODU3e2 {
    base tributary-protocol-type; odu-type;
    description
      "ODU3e2 protocol (41.78G).";
  }
*/
  identity prot-ODU4 ODU4 {
    base tributary-protocol-type; odu-type;
    description
      "ODU4 protocol (104.79G)";
  }

  identity prot-ODUFlex-cbr ODUFlex-cbr {
    base tributary-protocol-type; odu-type;
    description
      "ODU Flex CBR protocol for transporting constant bit rate
       signal";
  }

  identity prot-ODUFlex-gfp ODUFlex-gfp {
    base tributary-protocol-type; odu-type;
    description
      "ODU Flex GFP protocol for transporting stream of packets
       using Generic Framing Procedure";
  }

  identity prot-ODUCn ODUCn {
    base tributary-protocol-type; odu-type;
    description
      "ODUCn protocol (beyond 100G)";
  }

/*
Note: suggest to remove the types with 'prot-xGbE'.
*/

  identity prot-1GbE {
    base tributary-protocol-type;
    description
      "1G Ethernet protocol";
  }
  identity prot-10GbE-LAN {
    base tributary-protocol-type;
    description
      "10G Ethernet LAN protocol";
  }

  identity prot-40GbE {
    base tributary-protocol-type;
    description
      "40G Ethernet protocol";
  }

  identity prot-100GbE {
    base tributary-protocol-type;
    description
      "100G Ethernet protocol";
  }

  identity client-signal {
    description
      "Base identity from which specific client signals for the
       tunnel are derived";
  }

/*
Note: need to reconsider the prefix 'client-signal'.
Comment 1: need to understand whether for same client-signal, there
should be separate identity for transparent and non-transparent or not?
Comment 2: need to better align the term with other models, like L1CSM.
*/

  identity client-signal-1GbE ETH-1Gb {
    base client-signal;
    description
      "Client signal type of 1GbE";
  }

  identity client-signal-10GbE-LAN ETH-10Gb-LAN {
    base client-signal;
    description
      "Client signal type of 10GbE LAN";
  }

  identity client-signal-10GbE-WAN ETH-10Gb-WAN {
    base client-signal;
    description
      "Client signal type of 10GbE WAN";
  }

  identity client-signal-40GbE ETH-40Gb {
    base client-signal;
    description
      "Client signal type of 40GbE";
  }

  identity client-signal-100GbE ETH-100Gb {
    base client-signal;
    description
      "Client signal type of 100GbE";
  }

  identity client-signal-OC3_STM1 STM-1 {
    base client-signal;
    description
      "Client signal type of OC3 & STM1"; STM-1";
  }

  identity client-signal-OC12_STM4 STM-4 {
    base client-signal;
    description
      "Client signal type of OC12 & STM4"; STM-4";
  }

  identity client-signal-OC48_STM16 STM-16 {
    base client-signal;
    description
      "Client signal type of OC48 & STM16"; STM-16";
  }

  identity client-signal-OC192_STM64 STM-64 {
    base client-signal;
    description
      "Client signal type of OC192 & STM64"; STM-64";
  }

  identity client-signal-OC768_STM256 STM-256 {
    base client-signal;
    description
      "Client signal type of OC768 & STM256"; STM-256";
  }

  identity client-signal-ODU0 FC-100 {
    base client-signal;
    description
      "Client signal type of ODU0 (1.24G)";
  }

  identity client-signal-ODU1 {
    base client-signal;
    description
      "ODU1 protocol (2.49G)"; Fibre Channel FC-100";
  }

  identity client-signal-ODU2 FC-200 {
    base client-signal;
    description
      "Client signal type of ODU2 (10.03G)"; Fibre Channel FC-200";
  }

  identity client-signal-ODU2e FC-400 {
    base client-signal;
    description
      "Client signal type of ODU2e (10.39G)"; Fibre Channel FC-400";
  }

  identity client-signal-ODU3 FC-800 {
    base client-signal;
    description
      "Client signal type of ODU3 (40.31G)"; Fibre Channel FC-800";
  }
/*

  identity client-signal-ODU3e2 FC-1200 {
    base client-signal;
    description
      "Client signal type of ODU3e2 (41.78G)"; Fibre Channel FC-1200";
  }
*/

  identity client-signal-ODU4 FC-1600 {
    base client-signal;
    description
      "Client signal type of ODU4 (104.79G)"; Fibre Channel FC-1600";
  }

  identity client-signal-ODUflex-cbr FC-3200 {
    base client-signal;
    description
      "Client signal type of ODU Flex CBR"; Fibre Channel FC-3200";
  }

  identity client-signal-ODUflex-gfp FICON-4G {
    base client-signal;
    description
      "Client signal type of ODU Flex GFP"; Fibre Connection 4G";
  }

  identity client-signal-ODUCn {
    base client-signal;
    description
      "Client signal type of ODUCn (beyond 100G)";
  }

  identity client-signal-FC400 {
    base client-signal;
    description
      "Client signal type of Fibre Channel FC400";
  }

  identity client-signal-FC800 {
    base client-signal;
    description
      "Client signal type of Fibre Channel FC800";
  }

  identity client-signal-FICON-4G {
    base client-signal;
    description
      "Client signal type of Fibre Connection 4G";
  }

  identity client-signal-FICON-8G FICON-8G {
    base client-signal;
    description
      "Client signal type of Fibre Connection 8G";
  }

  identity client-signal-OTU1 {
    base client-signal;
    description
      "Client signal type of OTU1";
  }

  identity client-signal-OTU2 {
    base client-signal;
    description
      "Client signal type of OTU2";
  }

  identity client-signal-OTU2e {
    base client-signal;
    description
      "Client signal type of OTU2e";
  }

  identity client-signal-OTU3 {
    base client-signal;
    description
      "Client signal type of OTU3";
  }

  identity client-signal-OTU4 {
    base client-signal;
    description
      "Client signal type of OTU4";
  }

  identity otn-label-range-type {
    description
      "Base identity from which specific OTN label
           range types derived";
  }

  identity label-range-trib-slot {
    base otn-label-range-type;
    description
      "Defines a range of OTN tributary slots";
  }

  identity label-range-trib-port {
    base otn-label-range-type;
    description
      "Defines a range of OTN tributary ports";
  }

  grouping otn-link-bandwidth {
    description "link bandwidth attributes for OTN";
    list odulist {
      key "odu-type";
      description
        "OTN bandwidth definition";
      leaf odu-type {
        type identityref {
          base otn-types:tributary-protocol-type; otn-types:odu-type;
        }
        description "ODU type";
      }
      leaf number {
        type uint16;
        description "Number of ODUs";
      }
    }
  }

  grouping otn-path-bandwidth {
        description "path bandwidth attributes for OTN";
    leaf odu-type {
      type identityref {
        base otn-types:tributary-protocol-type; otn-types:odu-type;
      }
      description "ODU type";
    }
  }

  grouping otn-label-restriction {
        description "label restriction information for OTN";

    leaf range-type {
      type identityref {
        base otn-types:otn-label-range-type;
      }
      description "type for range";
    }
    leaf tsg {
      type identityref {
        base otn-types:tributary-slot-granularity;
      }
      description "Tributary slot granularity.";
      reference
        "G.709/Y.1331, February 2016: Interfaces for the
         Optical Transport Network (OTN)";
    }
    leaf priority {
      type uint8;
      description "priority.";
    }
  }

/* Note: Suggest to be changed as otn-label-range;
                otn-topology/tunnel also need change */
  grouping otn-link-label {
    description "link label information for OTN, for label-start/end";
    choice otn-label-type {
      description
        "OTN label type"; range type, either TPN range or TS range";
      case tributary-port {
        leaf tpn {
          type uint16 {
            range "1..4095";
          }
          description
            "Tributary Port Number. Applicable in case of mux services.";
          reference
            "RFC7139: GMPLS Signaling Extensions for Control of Evolving
             G.709 Optical Transport Networks.";
        }
      }
      case tributary-slot {
        leaf ts {
          type uint16 {
            range "1..4095";
          }
          description
            "Tributary Slot Number. Applicable in case of mux services.";
          reference
            "RFC7139: GMPLS Signaling Extensions for Control of Evolving
             G.709 Optical Transport Networks.";
        }
      }
    }
  }

/* Note: Suggest to be changed as otn-label;
                otn-topology/tunnel also need change */
  grouping otn-path-label {
    description "label information for OTN, for label-hop";
    leaf tpn {
      type uint16 {
        range "1..4095";
      }
      description
        "Tributary Port Number. Applicable in case of mux services.";
      reference
        "RFC7139: GMPLS Signaling Extensions for Control of Evolving
         G.709 Optical Transport Networks.";
    }
    leaf tsg {
      type identityref {
        base otn-types:tributary-slot-granularity;
      }
      description "Tributary slot granularity.";
      reference
        "G.709/Y.1331, February 2016: Interfaces for the
         Optical Transport Network (OTN)";
    }
    leaf ts-list {
      type string {
          pattern "([1-9][0-9]{0,3}(-[1-9][0-9]{0,3})?"
                + "(,[1-9][0-9]{0,3}(-[1-9][0-9]{0,3})?)*)";
        }
        description
          "A list of available tributary slots ranging
           between 1 and 9999.
           For example 1-20,25,50-1000";
        reference "RFC 7139: GMPLS Signaling Extensions for Control
                   of Evolving G.709 Optical Transport Networks";
    }
  }
}

<CODE ENDS>
7.  Security Considerations

   TBD.

   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
   [RFC5246].

   The NETCONF access control model [RFC6536] provides the means to
   restrict access for particular NETCONF or RESTCONF users to a
   preconfigured subset of all available NETCONF or RESTCONF protocol
   operations and content.

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

   /te:te/te:tunnels/te:tunnel /te:te/../te:te-bandwidth/te:technology
   /te:te/../te:type/te:label/te:label-hop/te:te-label/te:technology
   /te:te/../te:label-restrictions/te:label-restriction/te:label-start/
   te:te-label/te:technology /te:te/../te:label-restrictions/te:label-
   restriction/te:label-end/te:te-label/te:technology
   /te:te/../te:label-restrictions/te:label-restriction/ Editors note:
   we are using simplified description by folding similar branches to
   avoid repetation.

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

   /te:te/../te:type/te:label/te:label-hop/te:te-label/te:technology
   Editors note: we are using simplified description by folding similar
   branches to avoid repetation.

   Some of the RPC operations in this YANG module may be considered
   sensitive or vulnerable in some network environments.  It is thus
   important to control access to these operations.  These are the
   operations and their sensitivity/vulnerability:

   +---x otn-te-tunnel-path-compute This path compute RPC provides a
   mechanism to enable the client to query and/or subscribe on the
   tunnel to be notified whenever it changes.  Thus path computation is
   only for the client reference, with no real deploy or resource
   reservation.

8.  IANA Considerations

   TBD.

   It is proposed that IANA should assign new URIs from the "IETF XML
   Registry" [RFC3688] as follows: URI:
   urn:ietf:params:xml:ns:yang:ietf-otn-tunnel Registrant Contact: The
   IESG XML: N/A; the requested URI is an XML namespace.  URI:
   urn:ietf:params:xml:ns:yang:ietf-otn-types Registrant Contact: The
   IESG XML: N/A; the requested URI is an XML namespace.  This document
   registers following YANG modules in the YANG Module Names registry
   [RFC7950].  name: ietf-otn-tunnel namespace:
   urn:ietf:params:xml:ns:yang:ietf-otn-tunnel prefix: otn-tunnel
   reference: RFC XXXX name: ietf-otn-types namespace:
   urn:ietf:params:xml:ns:yang:ietf-otn-types prefix: otn-types
   reference: RFC XXXX

9.  Acknowledgements

   TBD.

10.  Contributors

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

   Yanlei Zheng
   China Unicom
   Email: zhengyl@dimpt.com

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

   Lei Wang
   China Mobile
   Email: wangleiyj@chinamobile.com

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

11.  References

11.1.  Normative References

   [I-D.ietf-ccamp-otn-topo-yang]
              zhenghaomian@huawei.com, z., Guo, A., Busi, I., Sharma,
              A., Liu, X., Belotti, S., Xu, Y., Wang, L., and O. Dios,
              "A YANG Data Model for Optical Transport Network
              Topology", draft-ietf-ccamp-otn-topo-yang-03 draft-ietf-ccamp-otn-topo-yang-04 (work in
              progress), June July 2018.

   [I-D.ietf-ccamp-transport-nbi-app-statement]
              Busi, I., King, D., zhenghaomian@huawei.com, z., and Y.
              Xu, "Transport Northbound Interface Applicability
              Statement", draft-ietf-ccamp-transport-nbi-app-
              statement-01
              statement-02 (work in progress), March July 2018.

   [I-D.ietf-teas-yang-te]
              Saad, T., Gandhi, R., Liu, X., Beeram, V., Shah, H., and
              I. Bryskin, "A YANG Data Model for Traffic Engineering
              Tunnels and Interfaces", draft-ietf-teas-yang-te-15 draft-ietf-teas-yang-te-16 (work
              in progress), June July 2018.

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

   [RFC5246]  Dierks, T. and E. Rescorla, "The Transport Layer Security
              (TLS) Protocol Version 1.2", RFC 5246,
              DOI 10.17487/RFC5246, August 2008,
              <https://www.rfc-editor.org/info/rfc5246>.

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

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

   [RFC6536]  Bierman, A. and M. Bjorklund, "Network Configuration
              Protocol (NETCONF) Access Control Model", RFC 6536,
              DOI 10.17487/RFC6536, March 2012,
              <https://www.rfc-editor.org/info/rfc6536>.

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

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

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

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

11.2.  Informative References

   [I-D.ietf-netmod-yang-tree-diagrams]
              Bjorklund, M. and L. Berger, "YANG Tree Diagrams", draft-
              ietf-netmod-yang-tree-diagrams-06 (work in progress),
              February 2018.

   [I-D.ietf-teas-actn-yang]
              Lee, Y., zhenghaomian@huawei.com, z., Ceccarelli, D.,
              Yoon, B., and S. Belotti, "Applicability of YANG models
              for Abstraction and Control of Traffic Engineered
              Networks", draft-ietf-teas-actn-yang-01 (work in
              progress), February 2018.

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

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

Authors' Addresses

   Haomian Zheng
   Huawei Technologies
   F3 R&D Center, Huawei Industrial Base, Bantian, Longgang District
   Shenzhen, Guangdong  518129
   P.R.China

   Email: zhenghaomian@huawei.com

   Aihua Guo
   Huawei Technologies
   12007 Sunrise Valley Drive, Suite 325
   Reston, VA  20171
   U.S.A

   Email: aihuaguo@huawei.com

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

   Email: Italo.Busi@huawei.com

   Anurag Sharma
   Google
   1600 Amphitheatre Parkway
   Mountain View, CA  94043
   USA

   Email: ansha@google.com

   Rajan Rao
   Infinera
   169 Java Drive
   Sunnyvale, CA  94089
   USA

   Email: rrao@infinera.com
   Sergio Belotti
   Nokia

   Email: sergio.belotti@nokia.com

   Victor Lopez
   Telefonica

   Email: victor.lopezalvarez@telefonica.com

   Yunbo Li
   China Mobile

   Email: liyunbo@chinamobile.com

   Yunbin Xu
   CAICT

   Email: xuyunbin@ritt.cn