OTN Tunnel YANG Model
draft-ietf-ccamp-otn-tunnel-model-13

Document Type Active Internet-Draft (ccamp WG)
Authors Haomian Zheng  , Italo Busi  , Sergio Belotti  , Victor Lopez  , Yunbin Xu 
Last updated 2021-04-12
Replaces draft-sharma-ccamp-otn-tunnel-model
Stream Internet Engineering Task Force (IETF)
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- Yang catalog entry for ietf-otn-tunnel@2020-03-09.yang
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CCAMP Working Group                                             H. Zheng
Internet-Draft                                                   I. Busi
Intended status: Standards Track                     Huawei Technologies
Expires: October 14, 2021                                     S. Belotti
                                                                   Nokia
                                                                V. Lopez
                                                              Telefonica
                                                                   Y. Xu
                                                                   CAICT
                                                          April 12, 2021

                         OTN Tunnel YANG Model
                  draft-ietf-ccamp-otn-tunnel-model-13

Abstract

   This document describes the YANG data model for tunnels in OTN TE
   networks.  The model can be used to do the configuration in order to
   establish the tunnel in OTN network.  This work is independent with
   the control plane protocols.  The YANG data model defined in this
   document conforms to the Network Management Datastore Architecture
   (NMDA).

Status of This Memo

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

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

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

   This Internet-Draft will expire on October 14, 2021.

Copyright Notice

   Copyright (c) 2021 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

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

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terminology and Notations . . . . . . . . . . . . . . . . . .   2
   3.  OTN Tunnel Model Description  . . . . . . . . . . . . . . . .   3
     3.1.  Overview of OTN Tunnel Model  . . . . . . . . . . . . . .   3
     3.2.  Bandwidth Augmentation  . . . . . . . . . . . . . . . . .   4
     3.3.  Label Augmentation  . . . . . . . . . . . . . . . . . . .   4
   4.  OTN Tunnel YANG Tree  . . . . . . . . . . . . . . . . . . . .   4
   5.  OTN Tunnel YANG Code  . . . . . . . . . . . . . . . . . . . .  15
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .  31
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  32
   8.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  32
   9.  Contributors  . . . . . . . . . . . . . . . . . . . . . . . .  32
   10. References  . . . . . . . . . . . . . . . . . . . . . . . . .  33
     10.1.  Normative References . . . . . . . . . . . . . . . . . .  33
     10.2.  Informative References . . . . . . . . . . . . . . . . .  34
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  35

1.  Introduction

   OTN transport networks, specified in [ITU-Tg709], can carry various
   types of client signals.  In many cases, the client signal is carried
   over an OTN tunnel across connected domains in a multi-domain
   network.

   This document provides YANG model for creating OTN tunnel.  The model
   augments the generic TE Tunnel model specified in
   [I-D.ietf-teas-yang-te].

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 [RFC8340].  They are
   provided below for reference.

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

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   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

   This document aims to describe the data model for OTN tunnel.  The
   OTN tunnel model is using TE tunnel [I-D.ietf-teas-yang-te] as a
   basic model and augments it with OTN-specific parameters, including
   the bandwidth information and label information.  Figure 1 shows the
   augmentation relationship.

                           +----------------+
              TE generic   |     ietf-te    |
                           +----------------+
                                    ^
                                    |
                                    | Augments
                                    |
                           +--------+--------+
              OTN          | ietf-otn-tunnel |
                           +-----------------+
          Figure 1 - Relationship between OTN and TE tunnel models

   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-layer1-types, ietf-te-types and
   ietf-inet-types.  The OTN-specific attributes in [RFC7139], including
   the Tributary Slot (TS) and Tributary Port Number (TPN), can be used
   to represent the bandwidth and label information.  These attributes

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   have been specified in [I-D.ietf-ccamp-layer1-types] and used in this
   document for augmentation of the generic TE tunnel model.

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

3.2.  Bandwidth Augmentation

   The model augments all the occurrences of the te-bandwidth container
   with the OTN technology specific attributes using the otn-link-
   bandwidth and otn-path-bandwidth groupings defined in
   [I-D.ietf-ccamp-layer1-types].

3.3.  Label Augmentation

   The model augments all the occurrences of the label-restriction list
   with OTN technology specific attributes using the otn-label-range-
   info grouping defined in [I-D.ietf-ccamp-layer1-types].

   Moreover, the model augments all the occurrences of the te-label
   container with the OTN technology specific attributes using the otn-
   label-start-end, otn-label-hop and otn-label-step groupings defined
   in [I-D.ietf-ccamp-layer1-types].

4.  OTN Tunnel YANG Tree

   module: ietf-otn-tunnel
     augment /te:te/te:globals/te:named-path-constraints
               /te:named-path-constraint/te:te-bandwidth/te:technology:
       +--:(otn)
          +--rw otn
             +--rw odu-type?                     identityref
             +--rw (oduflex-type)?
                +--:(generic)
                |  +--rw nominal-bit-rate        uint64
                +--:(cbr)
                |  +--rw client-type             identityref
                +--:(gfp-n-k)
                |  +--rw gfp-n                   uint8
                |  +--rw gfp-k?                  gfp-k
                +--:(flexe-client)
                |  +--rw flexe-client            flexe-client-rate

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                +--:(flexe-aware)
                |  +--rw flexe-aware-n           uint16
                +--:(packet)
                   +--rw opuflex-payload-rate    uint64
     augment /te:te/te:tunnels/te:tunnel/te:te-bandwidth/te:technology:
       +--:(otn)
          +--rw otn
             +--rw odu-type?                     identityref
             +--rw (oduflex-type)?
                +--:(generic)
                |  +--rw nominal-bit-rate        uint64
                +--:(cbr)
                |  +--rw client-type             identityref
                +--:(gfp-n-k)
                |  +--rw gfp-n                   uint8
                |  +--rw gfp-k?                  gfp-k
                +--:(flexe-client)
                |  +--rw flexe-client            flexe-client-rate
                +--:(flexe-aware)
                |  +--rw flexe-aware-n           uint16
                +--:(packet)
                   +--rw opuflex-payload-rate    uint64
     augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths
               /te:p2p-primary-path/te:te-bandwidth/te:technology:
       +--:(otn)
          +--rw otn
             +--rw odu-type?                     identityref
             +--rw (oduflex-type)?
                +--:(generic)
                |  +--rw nominal-bit-rate        uint64
                +--:(cbr)
                |  +--rw client-type             identityref
                +--:(gfp-n-k)
                |  +--rw gfp-n                   uint8
                |  +--rw gfp-k?                  gfp-k
                +--:(flexe-client)
                |  +--rw flexe-client            flexe-client-rate
                +--:(flexe-aware)
                |  +--rw flexe-aware-n           uint16
                +--:(packet)
                   +--rw opuflex-payload-rate    uint64
     augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths
               /te:p2p-primary-path/te:p2p-primary-reverse-path
               /te:te-bandwidth/te:technology:
       +--:(otn)
          +--rw otn
             +--rw odu-type?                     identityref
             +--rw (oduflex-type)?

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                +--:(generic)
                |  +--rw nominal-bit-rate        uint64
                +--:(cbr)
                |  +--rw client-type             identityref
                +--:(gfp-n-k)
                |  +--rw gfp-n                   uint8
                |  +--rw gfp-k?                  gfp-k
                +--:(flexe-client)
                |  +--rw flexe-client            flexe-client-rate
                +--:(flexe-aware)
                |  +--rw flexe-aware-n           uint16
                +--:(packet)
                   +--rw opuflex-payload-rate    uint64
     augment /te:te/te:tunnels/te:tunnel/te:p2p-secondary-paths
               /te:p2p-secondary-path/te:te-bandwidth/te:technology:
       +--:(otn)
          +--rw otn
             +--rw odu-type?                     identityref
             +--rw (oduflex-type)?
                +--:(generic)
                |  +--rw nominal-bit-rate        uint64
                +--:(cbr)
                |  +--rw client-type             identityref
                +--:(gfp-n-k)
                |  +--rw gfp-n                   uint8
                |  +--rw gfp-k?                  gfp-k
                +--:(flexe-client)
                |  +--rw flexe-client            flexe-client-rate
                +--:(flexe-aware)
                |  +--rw flexe-aware-n           uint16
                +--:(packet)
                   +--rw opuflex-payload-rate    uint64
     augment /te:te/te:globals/te:named-path-constraints
               /te:named-path-constraint
               /te:explicit-route-objects-always
               /te:route-object-exclude-always/te:type/te:label
               /te:label-hop/te:te-label/te:technology:
       +--:(otn)
          +--rw otn-tpn?   otn-tpn
          +--rw tsg?       identityref
          +--rw ts-list?   string
     augment /te:te/te:globals/te:named-path-constraints
               /te:named-path-constraint
               /te:explicit-route-objects-always
               /te:route-object-include-exclude/te:type/te:label
               /te:label-hop/te:te-label/te:technology:
       +--:(otn)
          +--rw otn-tpn?   otn-tpn

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          +--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:label-restrictions/te:label-restriction:
       +--rw range-type?      otn-label-range-type
       +--rw tsg?             identityref
       +--rw odu-type-list*   identityref
       +--rw priority?        uint8
     augment /te:te/te:globals/te:named-path-constraints
               /te:named-path-constraint/te:path-in-segment
               /te:label-restrictions/te:label-restriction
               /te:label-start/te:te-label/te:technology:
       +--:(otn)
          +--rw (range-type)?
             +--:(trib-port)
             |  +--rw otn-tpn?   otn-tpn
             +--:(trib-slot)
                +--rw otn-ts?    otn-ts
     augment /te:te/te:globals/te:named-path-constraints
               /te:named-path-constraint/te:path-in-segment
               /te:label-restrictions/te:label-restriction/te:label-end
               /te:te-label/te:technology:
       +--:(otn)
          +--rw (range-type)?
             +--:(trib-port)
             |  +--rw otn-tpn?   otn-tpn
             +--:(trib-slot)
                +--rw otn-ts?    otn-ts
     augment /te:te/te:globals/te:named-path-constraints
               /te:named-path-constraint/te:path-out-segment
               /te:label-restrictions/te:label-restriction:
       +--rw range-type?      otn-label-range-type
       +--rw tsg?             identityref
       +--rw odu-type-list*   identityref
       +--rw priority?        uint8
     augment /te:te/te:globals/te:named-path-constraints
               /te:named-path-constraint/te:path-out-segment
               /te:label-restrictions/te:label-restriction
               /te:label-start/te:te-label/te:technology:
       +--:(otn)
          +--rw (range-type)?
             +--:(trib-port)
             |  +--rw otn-tpn?   otn-tpn
             +--:(trib-slot)
                +--rw otn-ts?    otn-ts
     augment /te:te/te:globals/te:named-path-constraints
               /te:named-path-constraint/te:path-out-segment

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               /te:label-restrictions/te:label-restriction/te:label-end
               /te:te-label/te:technology:
       +--:(otn)
          +--rw (range-type)?
             +--:(trib-port)
             |  +--rw otn-tpn?   otn-tpn
             +--:(trib-slot)
                +--rw otn-ts?    otn-ts
     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 otn-tpn?   otn-tpn
          +--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 otn-tpn?   otn-tpn
          +--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-always
               /te:route-object-exclude-always/te:type/te:label
               /te:label-hop/te:te-label/te:technology:
       +--:(otn)
          +--rw otn-tpn?   otn-tpn
          +--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-always
               /te:route-object-include-exclude/te:type/te:label
               /te:label-hop/te:te-label/te:technology:
       +--:(otn)
          +--rw otn-tpn?   otn-tpn
          +--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:label-restrictions/te:label-restriction:
       +--rw range-type?      otn-label-range-type

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       +--rw tsg?             identityref
       +--rw odu-type-list*   identityref
       +--rw priority?        uint8
     augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths
               /te:p2p-primary-path/te:path-in-segment
               /te:label-restrictions/te:label-restriction
               /te:label-start/te:te-label/te:technology:
       +--:(otn)
          +--rw (range-type)?
             +--:(trib-port)
             |  +--rw otn-tpn?   otn-tpn
             +--:(trib-slot)
                +--rw otn-ts?    otn-ts
     augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths
               /te:p2p-primary-path/te:path-in-segment
               /te:label-restrictions/te:label-restriction/te:label-end
               /te:te-label/te:technology:
       +--:(otn)
          +--rw (range-type)?
             +--:(trib-port)
             |  +--rw otn-tpn?   otn-tpn
             +--:(trib-slot)
                +--rw otn-ts?    otn-ts
     augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths
               /te:p2p-primary-path/te:path-out-segment
               /te:label-restrictions/te:label-restriction:
       +--rw range-type?      otn-label-range-type
       +--rw tsg?             identityref
       +--rw odu-type-list*   identityref
       +--rw priority?        uint8
     augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths
               /te:p2p-primary-path/te:path-out-segment
               /te:label-restrictions/te:label-restriction
               /te:label-start/te:te-label/te:technology:
       +--:(otn)
          +--rw (range-type)?
             +--:(trib-port)
             |  +--rw otn-tpn?   otn-tpn
             +--:(trib-slot)
                +--rw otn-ts?    otn-ts
     augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths
               /te:p2p-primary-path/te:path-out-segment
               /te:label-restrictions/te:label-restriction/te:label-end
               /te:te-label/te:technology:
       +--:(otn)
          +--rw (range-type)?
             +--:(trib-port)
             |  +--rw otn-tpn?   otn-tpn

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             +--:(trib-slot)
                +--rw otn-ts?    otn-ts
     augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths
               /te:p2p-primary-path/te:computed-paths-properties
               /te:computed-path-properties/te:path-properties
               /te:path-route-objects/te:path-computed-route-object
               /te:type/te:label/te:label-hop/te:te-label/te:technology:
       +--:(otn)
          +--ro otn-tpn?   otn-tpn
          +--ro tsg?       identityref
          +--ro ts-list?   string
     augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths
               /te:p2p-primary-path/te:lsps/te:lsp
               /te:lsp-record-route-information
               /te:lsp-record-route-information/te:type/te:label
               /te:label-hop/te:te-label/te:technology:
       +--:(otn)
          +--ro otn-tpn?   otn-tpn
          +--ro tsg?       identityref
          +--ro ts-list?   string
     augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths
               /te:p2p-primary-path/te:lsps/te:lsp/te:path-properties
               /te:path-route-objects/te:path-computed-route-object
               /te:type/te:label/te:label-hop/te:te-label/te:technology:
       +--:(otn)
          +--ro otn-tpn?   otn-tpn
          +--ro tsg?       identityref
          +--ro ts-list?   string
     augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths
               /te:p2p-primary-path/te:p2p-primary-reverse-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 otn-tpn?   otn-tpn
          +--rw tsg?       identityref
          +--rw ts-list?   string
     augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths
               /te:p2p-primary-path/te:p2p-primary-reverse-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 otn-tpn?   otn-tpn
          +--rw tsg?       identityref
          +--rw ts-list?   string

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

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     augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths
               /te:p2p-primary-path/te:p2p-primary-reverse-path
               /te:path-out-segment/te:label-restrictions
               /te:label-restriction:
       +--rw range-type?      otn-label-range-type
       +--rw tsg?             identityref
       +--rw odu-type-list*   identityref
       +--rw priority?        uint8
     augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths
               /te:p2p-primary-path/te:p2p-primary-reverse-path
               /te:path-out-segment/te:label-restrictions
               /te:label-restriction/te:label-start/te:te-label
               /te:technology:
       +--:(otn)
          +--rw (range-type)?
             +--:(trib-port)
             |  +--rw otn-tpn?   otn-tpn
             +--:(trib-slot)
                +--rw otn-ts?    otn-ts
     augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths
               /te:p2p-primary-path/te:p2p-primary-reverse-path
               /te:path-out-segment/te:label-restrictions
               /te:label-restriction/te:label-end/te:te-label
               /te:technology:
       +--:(otn)
          +--rw (range-type)?
             +--:(trib-port)
             |  +--rw otn-tpn?   otn-tpn
             +--:(trib-slot)
                +--rw otn-ts?    otn-ts
     augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths
               /te:p2p-primary-path/te:p2p-primary-reverse-path
               /te:computed-paths-properties/te:computed-path-properties
               /te:path-properties/te:path-route-objects
               /te:path-computed-route-object/te:type/te:label
               /te:label-hop/te:te-label/te:technology:
       +--:(otn)
          +--ro otn-tpn?   otn-tpn
          +--ro tsg?       identityref
          +--ro ts-list?   string
     augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths
               /te:p2p-primary-path/te:p2p-primary-reverse-path/te:lsps
               /te:lsp/te:lsp-record-route-information
               /te:lsp-record-route-information/te:type/te:label
               /te:label-hop/te:te-label/te:technology:
       +--:(otn)
          +--ro otn-tpn?   otn-tpn
          +--ro tsg?       identityref

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          +--ro ts-list?   string
     augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths
               /te:p2p-primary-path/te:p2p-primary-reverse-path/te:lsps
               /te:lsp/te:path-properties/te:path-route-objects
               /te:path-computed-route-object/te:type/te:label
               /te:label-hop/te:te-label/te:technology:
       +--:(otn)
          +--ro otn-tpn?   otn-tpn
          +--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 otn-tpn?   otn-tpn
          +--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 otn-tpn?   otn-tpn
          +--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-always
               /te:route-object-exclude-always/te:type/te:label
               /te:label-hop/te:te-label/te:technology:
       +--:(otn)
          +--rw otn-tpn?   otn-tpn
          +--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-always
               /te:route-object-include-exclude/te:type/te:label
               /te:label-hop/te:te-label/te:technology:
       +--:(otn)
          +--rw otn-tpn?   otn-tpn
          +--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

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               /te:label-restrictions/te:label-restriction:
       +--rw range-type?      otn-label-range-type
       +--rw tsg?             identityref
       +--rw odu-type-list*   identityref
       +--rw priority?        uint8
     augment /te:te/te:tunnels/te:tunnel/te:p2p-secondary-paths
               /te:p2p-secondary-path/te:path-in-segment
               /te:label-restrictions/te:label-restriction
               /te:label-start/te:te-label/te:technology:
       +--:(otn)
          +--rw (range-type)?
             +--:(trib-port)
             |  +--rw otn-tpn?   otn-tpn
             +--:(trib-slot)
                +--rw otn-ts?    otn-ts
     augment /te:te/te:tunnels/te:tunnel/te:p2p-secondary-paths
               /te:p2p-secondary-path/te:path-in-segment
               /te:label-restrictions/te:label-restriction/te:label-end
               /te:te-label/te:technology:
       +--:(otn)
          +--rw (range-type)?
             +--:(trib-port)
             |  +--rw otn-tpn?   otn-tpn
             +--:(trib-slot)
                +--rw otn-ts?    otn-ts
     augment /te:te/te:tunnels/te:tunnel/te:p2p-secondary-paths
               /te:p2p-secondary-path/te:path-out-segment
               /te:label-restrictions/te:label-restriction:
       +--rw range-type?      otn-label-range-type
       +--rw tsg?             identityref
       +--rw odu-type-list*   identityref
       +--rw priority?        uint8
     augment /te:te/te:tunnels/te:tunnel/te:p2p-secondary-paths
               /te:p2p-secondary-path/te:path-out-segment
               /te:label-restrictions/te:label-restriction
               /te:label-start/te:te-label/te:technology:
       +--:(otn)
          +--rw (range-type)?
             +--:(trib-port)
             |  +--rw otn-tpn?   otn-tpn
             +--:(trib-slot)
                +--rw otn-ts?    otn-ts
     augment /te:te/te:tunnels/te:tunnel/te:p2p-secondary-paths
               /te:p2p-secondary-path/te:path-out-segment
               /te:label-restrictions/te:label-restriction/te:label-end
               /te:te-label/te:technology:
       +--:(otn)
          +--rw (range-type)?

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             +--:(trib-port)
             |  +--rw otn-tpn?   otn-tpn
             +--:(trib-slot)
                +--rw otn-ts?    otn-ts
     augment /te:te/te:tunnels/te:tunnel/te:p2p-secondary-paths
               /te:p2p-secondary-path/te:computed-paths-properties
               /te:computed-path-properties/te:path-properties
               /te:path-route-objects/te:path-computed-route-object
               /te:type/te:label/te:label-hop/te:te-label/te:technology:
       +--:(otn)
          +--ro otn-tpn?   otn-tpn
          +--ro tsg?       identityref
          +--ro ts-list?   string
     augment /te:te/te:tunnels/te:tunnel/te:p2p-secondary-paths
               /te:p2p-secondary-path/te:lsps/te:lsp
               /te:lsp-record-route-information
               /te:lsp-record-route-information/te:type/te:label
               /te:label-hop/te:te-label/te:technology:
       +--:(otn)
          +--ro otn-tpn?   otn-tpn
          +--ro tsg?       identityref
          +--ro ts-list?   string
     augment /te:te/te:tunnels/te:tunnel/te:p2p-secondary-paths
               /te:p2p-secondary-path/te:lsps/te:lsp/te:path-properties
               /te:path-route-objects/te:path-computed-route-object
               /te:type/te:label/te:label-hop/te:te-label/te:technology:
       +--:(otn)
          +--ro otn-tpn?   otn-tpn
          +--ro tsg?       identityref
          +--ro ts-list?   string
     augment /te:te/te:lsps-state/te:lsp/te:lsp-record-route-information
               /te:lsp-record-route-information/te:type/te:label
               /te:label-hop/te:te-label/te:technology:
       +--:(otn)
          +--ro otn-tpn?   otn-tpn
          +--ro tsg?       identityref
          +--ro ts-list?   string

5.  OTN Tunnel YANG Code

   <CODE BEGINS>file "ietf-otn-tunnel@2021-02-10.yang"
   module ietf-otn-tunnel {
     yang-version 1.1;
     namespace "urn:ietf:params:xml:ns:yang:ietf-otn-tunnel";
     prefix "otn-tunnel";

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     import ietf-te-types {
       prefix te-types;
       revision-date "2019-02-06";
       reference "draft-ietf-teas-yang-te-types: A YANG Data Model for
                  Common Traffic Engineering Types";
     }

     import ietf-te {
       prefix "te";
       revision-date "2019-02-15";
       reference
       "I-D.ietf-teas-yang-te-19: A YANG Data Model for Traffic
        Engineering Tunnels and Interfaces. ";
     }

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

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

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

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

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

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

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

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

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

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       Copyright (c) 2021 IETF Trust and the persons
       identified as authors of the code.  All rights reserved.

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

       This version of this YANG module is part of RFC XXXX; see
       the RFC itself for full legal notices.";

     revision "2021-04-12" {
       description
         "Initial Revision";
       reference
         "RFC XXXX: OTN Tunnel YANG Model";
       // RFC Ed.: replace XXXX with actual RFC number, update date
       // information and remove this note
     }

    /*
     * Data nodes
     */

     /*
      * 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 l1-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 l1-types:otn-path-bandwidth;
       }
     }

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     /* 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 l1-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-primary-reverse-path/"
           + "te:te-bandwidth/te:technology" {
       description "OTN bandwidth.";
       case otn {
         uses l1-types:otn-path-bandwidth;
       }
     }

     /* Augment bandwidth 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 l1-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-always/"
           + "te:route-object-exclude-always/te:type/te:label/"
           + "te:label-hop/te:te-label/te:technology" {
       description "OTN label.";
       case otn {
         uses l1-types:otn-label-hop;
       }
     }

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     /* 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-always/"
           + "te:route-object-include-exclude/te:type/te:label/"
           + "te:label-hop/te:te-label/te:technology" {
       description "OTN label.";
       case otn {
         uses l1-types:otn-label-hop;
       }
     }

     /* 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:label-restrictions/te:label-restriction" {
       description "OTN label.";
       uses l1-types:otn-label-range-info;
     }

     /* 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:label-restrictions/"
           + "te:label-restriction/te:label-start/"
           + "te:te-label/te:technology" {
       description "OTN label.";
       case otn {
         uses l1-types:otn-label-start-end;
       }
     }

     /* 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:label-restrictions/"
           + "te:label-restriction/te:label-end/"
           + "te:te-label/te:technology" {
       description "OTN label.";
       case otn {
         uses l1-types:otn-label-start-end;
       }
     }

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     /* 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:label-restrictions/"
           + "te:label-restriction" {
       description "OTN label.";
       uses l1-types:otn-label-range-info;
     }

     /* 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:label-restrictions/"
           + "te:label-restriction/te:label-start/"
           + "te:te-label/te:technology" {
       description "OTN label.";
       case otn {
         uses l1-types:otn-label-start-end;
       }
     }

     /* 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:label-restrictions/"
           + "te:label-restriction/te:label-end/"
           + "te:te-label/te:technology" {
       description "OTN label.";
       case otn {
         uses l1-types:otn-label-start-end;
       }
     }

     /* 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 l1-types:otn-label-hop;
       }
     }

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     /* 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 l1-types:otn-label-hop;
       }
     }

     /* 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-always/"
           + "te:route-object-exclude-always/te:type/te:label/"
           + "te:label-hop/te:te-label/te:technology" {
       description "OTN label.";
       case otn {
         uses l1-types:otn-label-hop;
       }
     }

     /* 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-always/"
           + "te:route-object-include-exclude/te:type/te:label/"
           + "te:label-hop/te:te-label/te:technology" {
       description "OTN label.";
       case otn {
         uses l1-types:otn-label-hop;
       }
     }

     /* Augment label restrictions for the 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:label-restrictions/"
           + "te:label-restriction" {
       description "OTN label.";
       uses l1-types:otn-label-range-info;
     }

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     /* 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:label-restrictions/"
           + "te:label-restriction/te:label-start/"
           + "te:te-label/te:technology" {
       description "OTN label.";
       case otn {
         uses l1-types:otn-label-start-end;
       }
     }

     /* 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:label-restrictions/"
           + "te:label-restriction/te:label-end/"
           + "te:te-label/te:technology" {
       description "OTN label.";
       case otn {
         uses l1-types:otn-label-start-end;
       }
     }

     /* 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:label-restrictions/"
           + "te:label-restriction" {
       description "OTN label.";
       uses l1-types:otn-label-range-info;
     }

     /* 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:label-restrictions/"
           + "te:label-restriction/te:label-start/"
           + "te:te-label/te:technology" {
       description "OTN label.";
       case otn {
         uses l1-types:otn-label-start-end;
       }
     }

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     /* 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:label-restrictions/"
           + "te:label-restriction/te:label-end/"
           + "te:te-label/te:technology" {
       description "OTN label.";
       case otn {
         uses l1-types:otn-label-start-end;
       }
     }

     /* 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:computed-paths-properties/"
           + "te:computed-path-properties/te:path-properties/"
           + "te:path-route-objects/te:path-computed-route-object/"
           + "te:type/te:label/"
           + "te:label-hop/te:te-label/te:technology" {
       description "OTN label.";
       case otn {
         uses l1-types:otn-label-hop;
       }
     }

     /* 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:lsps/te:lsp/te:lsp-record-route-information/"
           + "te:lsp-record-route-information/te:type/te:label/"
           + "te:label-hop/te:te-label/te:technology" {
       description "OTN label.";
       case otn {
         uses l1-types:otn-label-hop;
       }
     }

     /* 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:lsps/te:lsp/te:path-properties/"
           + "te:path-route-objects/te:path-computed-route-object/"
           + "te:type/te:label/"
           + "te:label-hop/te:te-label/te:technology" {
       description "OTN label.";
       case otn {

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         uses l1-types:otn-label-hop;
       }
     }

     /* 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-primary-reverse-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 l1-types:otn-label-hop;
       }
     }

     /* 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-primary-reverse-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 l1-types:otn-label-hop;
       }
     }

     /* 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-primary-reverse-path/"
           + "te:explicit-route-objects-always/"
           + "te:route-object-exclude-always/"
           + "te:type/te:label/"
           + "te:label-hop/te:te-label/te:technology" {
       description "OTN label.";
       case otn {
         uses l1-types:otn-label-hop;
       }
     }

     /* Augment label hop of route-object-include-exclude of

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        reverse primary path */
     augment "/te:te/te:tunnels/te:tunnel/"
           + "te:p2p-primary-paths/te:p2p-primary-path/"
           + "te:p2p-primary-reverse-path/"
           + "te:explicit-route-objects-always/"
           + "te:route-object-include-exclude/"
           + "te:type/te:label/"
           + "te:label-hop/te:te-label/te:technology" {
       description "OTN label.";
       case otn {
         uses l1-types:otn-label-hop;
       }
     }

     /* 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-primary-reverse-path/"
           + "te:path-in-segment/te:label-restrictions/"
           + "te:label-restriction" {
       description "OTN label.";
       uses l1-types:otn-label-range-info;
     }

     /* 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-primary-reverse-path/"
           + "te:path-in-segment/te:label-restrictions/"
           + "te:label-restriction/te:label-start/"
           + "te:te-label/te:technology" {
       description "OTN label.";
       case otn {
         uses l1-types:otn-label-start-end;
       }
     }

     /* 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-primary-reverse-path/"
           + "te:path-in-segment/te:label-restrictions/"
           + "te:label-restriction/te:label-end/"
           + "te:te-label/te:technology" {
       description "OTN label.";

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

     /* 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-primary-reverse-path/"
           + "te:path-out-segment/te:label-restrictions/"
           + "te:label-restriction" {
       description "OTN label.";
       uses l1-types:otn-label-range-info;
     }

     /* 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-primary-reverse-path/"
           + "te:path-out-segment/te:label-restrictions/"
           + "te:label-restriction/te:label-start/"
           + "te:te-label/te:technology" {
       description "OTN label.";
       case otn {
         uses l1-types:otn-label-start-end;
       }
     }

     /* 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-primary-reverse-path/"
           + "te:path-out-segment/te:label-restrictions/"
           + "te:label-restriction/te:label-end/"
           + "te:te-label/te:technology" {
       description "OTN label.";
       case otn {
         uses l1-types:otn-label-start-end;
       }
     }

     /* 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-primary-reverse-path/"

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           + "te:computed-paths-properties/te:computed-path-properties/"
           + "te:path-properties/te:path-route-objects/"
           + "te:path-computed-route-object/te:type/te:label/"
           + "te:label-hop/te:te-label/te:technology" {
       description "OTN label.";
       case otn {
         uses l1-types:otn-label-hop;
       }
     }

     /* 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-primary-reverse-path/"
           + "te:lsps/te:lsp/te:lsp-record-route-information/"
           + "te:lsp-record-route-information/te:type/te:label/"
           + "te:label-hop/te:te-label/te:technology" {
       description "OTN label.";
       case otn {
         uses l1-types:otn-label-hop;
       }
     }

     /* 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-primary-reverse-path/"
           + "te:lsps/te:lsp/te:path-properties/"
           + "te:path-route-objects/te:path-computed-route-object/"
           + "te:type/te:label/"
           + "te:label-hop/te:te-label/te:technology" {
       description "OTN label.";
       case otn {
         uses l1-types:otn-label-hop;
       }
     }

     /* 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 l1-types:otn-label-hop;
       }

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     }

     /* 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 l1-types:otn-label-hop;
       }
     }

     /* 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-always/"
           + "te:route-object-exclude-always/te:type/te:label/"
           + "te:label-hop/te:te-label/te:technology" {
       description "OTN label.";
       case otn {
         uses l1-types:otn-label-hop;
       }
     }

     /* 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-always/"
           + "te:route-object-include-exclude/te:type/te:label/"
           + "te:label-hop/te:te-label/te:technology" {
       description "OTN label.";
       case otn {
         uses l1-types:otn-label-hop;
       }
     }

     /* 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:label-restrictions/"
           + "te:label-restriction" {
       description "OTN label.";

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       uses l1-types:otn-label-range-info;
     }

     /* 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:label-restrictions/"
           + "te:label-restriction/te:label-start/"
           + "te:te-label/te:technology" {
       description "OTN label.";
       case otn {
         uses l1-types:otn-label-start-end;
       }
     }

     /* 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:label-restrictions/"
           + "te:label-restriction/te:label-end/"
           + "te:te-label/te:technology" {
       description "OTN label.";
       case otn {
         uses l1-types:otn-label-start-end;
       }
     }

     /* 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:label-restrictions/"
           + "te:label-restriction" {
       description "OTN label.";
       uses l1-types:otn-label-range-info;
     }

     /* 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:label-restrictions/"
           + "te:label-restriction/te:label-start/"
           + "te:te-label/te:technology" {
       description "OTN label.";
       case otn {

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

     /* 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:label-restrictions/"
           + "te:label-restriction/te:label-end/"
           + "te:te-label/te:technology" {
       description "OTN label.";
       case otn {
         uses l1-types:otn-label-start-end;
       }
     }

     /* 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:computed-paths-properties/"
           + "te:computed-path-properties/"
           + "te:path-properties/te:path-route-objects/"
           + "te:path-computed-route-object/te:type/te:label/"
           + "te:label-hop/te:te-label/te:technology" {
       description "OTN label.";
       case otn {
         uses l1-types:otn-label-hop;
       }
     }

     /* 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:lsps/te:lsp/te:lsp-record-route-information/"
           + "te:lsp-record-route-information/te:type/te:label/"
           + "te:label-hop/te:te-label/te:technology" {
       description "OTN label.";
       case otn {
         uses l1-types:otn-label-hop;
       }
     }

     /* 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:lsps/te:lsp/te:path-properties/"
           + "te:path-route-objects/"

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           + "te:path-computed-route-object/te:type/te:label/"
           + "te:label-hop/te:te-label/te:technology" {
       description "OTN label.";
       case otn {
         uses l1-types:otn-label-hop;
       }
     }

     /* Augment label hop of record-route of LSP */
     augment "/te:te/te:lsps-state/"
           + "te:lsp/te:lsp-record-route-information/"
           + "te:lsp-record-route-information/te:type/te:label/"
           + "te:label-hop/te:te-label/te:technology" {
       description "OTN label.";
       case otn {
         uses l1-types:otn-label-hop;
       }
     }
   }
   <CODE ENDS>

6.  Security Considerations

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

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

   There are a number of data nodes defined in this YANG module that are
   writable/creatable/deletable (i.e., config true, which is the
   default).  These data nodes may be considered sensitive or vulnerable
   in some network environments.  Write operations (e.g., edit-config)
   to these data nodes without proper protection can have a negative
   effect on network operations.  Considerations in Section 10 of
   [I-D.ietf-teas-yang-te]are also applicable to their subtrees in the
   module defined in this document.

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   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.  Considerations in Section 10 of
   [I-D.ietf-teas-yang-te]are also applicable to their subtrees in the
   module defined in this document.

7.  IANA Considerations

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

         URI: urn:ietf:params:xml:ns:yang:ietf-otn-tunnel
         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

8.  Acknowledgements

   TBD.

9.  Contributors

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

   Anurag Sharma
   Google
   Email: ansha@google.com

   Rajan Rao
   Infinera
   Email: rrao@infinera.com

   Yunbo Li
   China Mobile

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   Email: liyunbo@chinamobile.com

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

   Yanlei Zheng
   China Unicom
   Email: zhengyanlei@chinaunicom.cn

   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

10.  References

10.1.  Normative References

   [I-D.ietf-ccamp-layer1-types]
              Zheng, H. and I. Busi, "A YANG Data Model for Layer 1
              Types", draft-ietf-ccamp-layer1-types-08 (work in
              progress), November 2020.

   [I-D.ietf-ccamp-otn-topo-yang]
              Zheng, H., Busi, I., Liu, X., Belotti, S., and O. Dios, "A
              YANG Data Model for Optical Transport Network Topology",
              draft-ietf-ccamp-otn-topo-yang-11 (work in progress),
              September 2020.

   [I-D.ietf-teas-yang-te]
              Saad, T., Gandhi, R., Liu, X., Beeram, V., and I. Bryskin,
              "A YANG Data Model for Traffic Engineering Tunnels, Label
              Switched Paths and Interfaces", draft-ietf-teas-yang-te-25
              (work in progress), July 2020.

   [ITU-Tg709]
              International Telecommunication Union, "Interfaces for the
              optical transport network", ITU-T G.709, March 2020.

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

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

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

   [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>.

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

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

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

10.2.  Informative References

   [I-D.ietf-ccamp-transport-nbi-app-statement]
              Busi, I., King, D., Zheng, H., and Y. Xu, "Transport
              Northbound Interface Applicability Statement", draft-ietf-
              ccamp-transport-nbi-app-statement-12 (work in progress),
              January 2021.

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   [I-D.ietf-teas-actn-yang]
              Lee, Y., Zheng, H., Ceccarelli, D., Yoon, B., Dios, O.,
              Shin, J., and S. Belotti, "Applicability of YANG models
              for Abstraction and Control of Traffic Engineered
              Networks", draft-ietf-teas-actn-yang-06 (work in
              progress), August 2020.

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

   [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>.

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

Authors' Addresses

   Haomian Zheng
   Huawei Technologies
   H1, Huawei Xiliu Beipo Village, Songshan Lake
   Dongguan, Guangdong  523808
   China

   Email: zhenghaomian@huawei.com

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

   Email: Italo.Busi@huawei.com

   Sergio Belotti
   Nokia

   Email: sergio.belotti@nokia.com

Zheng, et al.           Expires October 14, 2021               [Page 35]
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   Victor Lopez
   Telefonica

   Email: victor.lopezalvarez@telefonica.com

   Yunbin Xu
   CAICT

   Email: xuyunbin@caict.ac.cn

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