OTN Tunnel YANG Model
draft-ietf-ccamp-otn-tunnel-model-09

Abstract

This document describes the YANG data model for OTN Tunnels.

Status of This Memo

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Copyright Notice

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

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

Table of Contents

• 1. Introduction
• 2. Terminology and Notations
• 3. OTN Tunnel Model Description
• 3.1. Overview of OTN Tunnel Model
• 3.2. OTN-specific Parameters in Tunnel Model
• 3.3. OTN Path Compute RPC
• 4. OTN Tunnel YANG Tree
• 5. OTN Tunnel YANG Code
• 6. Security Considerations
• 7. IANA Considerations
• 8. Acknowledgements
• 9. Contributors
• 10. References
• 10.1. Normative References
• 10.2. Informative References
• Authors' Addresses

1. Introduction

OTN transport networks, specified in [ITU-Tg709], 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 [RFC8340]. They are provided below for reference.

• Brackets "[" and "]" enclose list keys.
• Abbreviations before data node names: "rw" means configuration (read-write) and "ro" state data (read-only).
• Symbols after data node names: "?" means an optional node, "!" means a presence container, and "*" denotes a list and leaf-list.
• Parentheses enclose choice and case nodes, and case nodes are also marked with a colon (":").
• Ellipsis ("...") stands for contents of subtrees that are not shown.
• 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-primary-reverse-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-always
            /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-always
            /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:label-restrictions/te:label-restriction:
    +--rw range-type?      identityref
    +--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 (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: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:label-restrictions/te:label-restriction:
    +--rw range-type?      identityref
    +--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 (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: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-always
            /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-always
            /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:label-restrictions/te:label-restriction:
    +--rw range-type?      identityref
    +--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 (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: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:label-restrictions/te:label-restriction:
    +--rw range-type?      identityref
    +--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 (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: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: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 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: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 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: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 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-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 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-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 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-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 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-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 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-primary-reverse-path
            /te:path-in-segment/te:label-restrictions
            /te:label-restriction:
    +--rw range-type?      identityref
    +--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 (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-primary-reverse-path
            /te:path-in-segment/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-primary-reverse-path
            /te:path-out-segment/te:label-restrictions
            /te:label-restriction:
    +--rw range-type?      identityref
    +--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 (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-primary-reverse-path
            /te:path-out-segment/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-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 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-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 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-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 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-always
            /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-always
            /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:label-restrictions/te:label-restriction:
    +--rw range-type?      identityref
    +--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 (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: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:label-restrictions/te:label-restriction:
    +--rw range-type?      identityref
    +--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 (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: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: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 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: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 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: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 tpn?       uint16
       +--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 tpn?       uint16
       +--ro tsg?       identityref
       +--ro ts-list?   string



 
    

5. OTN Tunnel YANG Code

 
<CODE BEGINS>file "ietf-otn-tunnel@2019-11-02.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";
    reference 
    "I-D.ietf-teas-yang-te: A YANG Data Model for Traffic Engineering 
    Tunnels and Interfaces. ";
  }

  import ietf-layer1-types {
    prefix "layer1-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).
    
    Copyright (c) 2019 IETF Trust and the persons
 	identified as authors of the code.  All rights reserved.

  	Redistribution and use in source and binary forms, with or
  	without modification, is permitted pursuant to, and subject
  	to the license terms contained in, the Simplified BSD License
  	set forth in Section 4.c of the IETF Trust's Legal Provisions
  	Relating to IETF Documents
  	(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 "2019-11-02" {
    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
  }

 /*
  * Groupings
  */

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

    leaf src-client-signal {
      type identityref {
        base layer1-types:client-signal;
      }
      description
        "Client signal at the source endpoint of the tunnel. ";
    }

    leaf dst-client-signal {
      type identityref {
        base layer1-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 layer1-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 layer1-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 layer1-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 layer1-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 layer1-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 layer1-types:otn-label-hop;
    }
  }

  /* 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 layer1-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 layer1-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 layer1-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 layer1-types:otn-label-start-end;
    }
  }

  /* 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 layer1-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 layer1-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 layer1-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 layer1-types:otn-label-hop;
    }
  }

  /* 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 layer1-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 layer1-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 layer1-types:otn-label-hop;
    }
  }

  /* 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:label-restrictions/"
        + "te:label-restriction" {
    description "OTN label.";
    uses layer1-types:otn-label-range-info;
  }

  /* 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 layer1-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 layer1-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 layer1-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 layer1-types:otn-label-start-end;
    }
  }

  /* 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 layer1-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 layer1-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 layer1-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 {
      uses layer1-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 layer1-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 layer1-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 layer1-types:otn-label-hop;
    }
  }

  /* 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-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 layer1-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 layer1-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 layer1-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.";
    case otn {
      uses layer1-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 layer1-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 layer1-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 layer1-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/"
        + "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 layer1-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 layer1-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 layer1-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 layer1-types:otn-label-hop;
    }
  }

  /* 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 layer1-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 layer1-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 layer1-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.";
    uses layer1-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 layer1-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 layer1-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 layer1-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 {
      uses layer1-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 layer1-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 layer1-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 layer1-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/"
        + "te:path-computed-route-object/te:type/te:label/"
        + "te:label-hop/te:te-label/te:technology" {
    description "OTN label.";
    case otn {
      uses layer1-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 layer1-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. 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.

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.

      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
		
		

8. Acknowledgements

TBD.

9. Contributors

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

Anurag Sharma
Google
Email: ansha@google.com

Rajan Rao
Infinera
Email: rrao@infinera.com

Yunbo Li
China Mobile
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

10.2. Informative References

Authors' Addresses