CCAMP Working Group H. Zheng
Internet-Draft I. Busi
Intended status: Standards Track Huawei Technologies
Expires: April 25, 2020 S. Belotti
Nokia
V. Lopez
Telefonica
Y. Xu
CAICT
October 23, 2019

OTN Tunnel YANG Model
draft-ietf-ccamp-otn-tunnel-model-08

Abstract

This document describes the YANG data model for OTN Tunnels.

Status of This Memo

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

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

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This Internet-Draft will expire on April 25, 2020.

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

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.

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 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 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 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 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 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 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 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 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@2019-10-23.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.
    
    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).";

  revision "2019-10-23" {
    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-path-label;
    }
  }

  /* Augment label hop of route-object-include-exclude of named-path-constraints */
  augment "/te:te/te:globals/te:named-path-constraints/"
        + "te:named-path-constraint/te:explicit-route-objects-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-path-label;
    }
  }

  /* Augment label restrictions for the forwarding direction of path-in-segment of named-path-constraints */
  augment "/te:te/te:globals/te:named-path-constraints/"
        + "te:named-path-constraint/te:path-in-segment/"
        + "te:label-restrictions/te:label-restriction"  {
    description "OTN label.";
    uses layer1-types:otn-label-restriction;
  }

  /* Augment label restrictions start for the forwarding direction of path-in-segment of named-path-constraints */
  augment "/te:te/te:globals/te:named-path-constraints/"
        + "te:named-path-constraint/te:path-in-segment/"
        + "te:label-restrictions/"
        + "te:label-restriction/te:label-start/"
        + "te:te-label/te:technology" {
    description "OTN label.";
    case otn {
      uses layer1-types:otn-link-label;
    }
  }

  /* Augment label restrictions end for the forwarding direction of path-in-segment of named-path-constraints */
  augment "/te:te/te:globals/te:named-path-constraints/"
        + "te:named-path-constraint/te:path-in-segment/"
        + "te:label-restrictions/"
        + "te:label-restriction/te:label-end/"
        + "te:te-label/te:technology" {
    description "OTN label.";
    case otn {
      uses layer1-types:otn-link-label;
    }
  }

  /* Augment label restrictions for the forwarding direction of path-out-segment of named-path-constraints */
  augment "/te:te/te:globals/te:named-path-constraints/"
        + "te:named-path-constraint/te:path-out-segment/"
        + "te:label-restrictions/"
        + "te:label-restriction" {
    description "OTN label.";
    uses layer1-types:otn-label-restriction;
  }
  /* Augment label restrictions start for the forwarding direction of path-out-segment of named-path-constraints */
  augment "/te:te/te:globals/te:named-path-constraints/"
        + "te:named-path-constraint/te:path-out-segment/"
        + "te:label-restrictions/"
        + "te:label-restriction/te:label-start/"
        + "te:te-label/te:technology" {
    description "OTN label.";
    case otn {
      uses layer1-types:otn-link-label;
    }
  }

  /* Augment label restrictions end for the forwarding direction of path-out-segment of named-path-constraints */
  augment "/te:te/te:globals/te:named-path-constraints/"
        + "te:named-path-constraint/te:path-out-segment/"
        + "te:label-restrictions/"
        + "te:label-restriction/te:label-end/"
        + "te:te-label/te:technology" {
    description "OTN label.";
    case otn {
      uses layer1-types:otn-link-label;
    }
  }

  /* Augment label hop of route-exclude of primary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-primary-paths/te:p2p-primary-path/"
        + "te:optimizations/te:algorithm/te:metric/"
        + "te:optimization-metric/te:explicit-route-exclude-objects/"
        + "te:route-object-exclude-object/te:type/te:label/"
        + "te:label-hop/te:te-label/te:technology" {
    description "OTN label.";
    case otn {
      uses layer1-types:otn-path-label;
    }
  }

  /* Augment label hop of route-include of primary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-primary-paths/te:p2p-primary-path/"
        + "te:optimizations/te:algorithm/te:metric/"
        + "te:optimization-metric/te:explicit-route-include-objects/"
        + "te:route-object-include-object/te:type/te:label/"
        + "te:label-hop/te:te-label/te:technology" {
    description "OTN label.";
    case otn {
      uses layer1-types:otn-path-label;
    }
  }

  /* Augment label hop of route-object-exclude-always of primary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-primary-paths/te:p2p-primary-path/"
        + "te:explicit-route-objects-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-path-label;
    }
  }

  /* Augment label hop of route-object-include-exclude of primary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-primary-paths/te:p2p-primary-path/"
        + "te:explicit-route-objects-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-path-label;
    }
  }

  /* Augment label restrictions for the forwarding direction of path-in-segment of primary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-primary-paths/te:p2p-primary-path/"
        + "te:path-in-segment/te:label-restrictions/"
        + "te:label-restriction" {
    description "OTN label.";
    uses layer1-types:otn-label-restriction;
  }

  /* Augment label restrictions start for the forwarding direction of path-in-segment of primary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-primary-paths/te:p2p-primary-path/"
        + "te:path-in-segment/te:label-restrictions/"
        + "te:label-restriction/te:label-start/"
        + "te:te-label/te:technology" {
    description "OTN label.";
    case otn {
      uses layer1-types:otn-link-label;
    }
  }

  /* Augment label restrictions end for the forwarding direction of path-in-segment of primary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-primary-paths/te:p2p-primary-path/"
        + "te:path-in-segment/te:label-restrictions/"
        + "te:label-restriction/te:label-end/"
        + "te:te-label/te:technology" {
    description "OTN label.";
    case otn {
      uses layer1-types:otn-link-label;
    }
  }

  /* Augment label restrictions for the forwarding direction of path-out-segment of primary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-primary-paths/te:p2p-primary-path/"
        + "te:path-out-segment/te:label-restrictions/"
        + "te:label-restriction" {
    description "OTN label.";
    uses layer1-types:otn-label-restriction;
  }

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

    description "OTN label.";
    case otn {
      uses layer1-types:otn-link-label;
    }
  }

  /* Augment label restrictions end for the forwarding direction of path-out-segment of primary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-primary-paths/te:p2p-primary-path/"
        + "te:path-out-segment/te:label-restrictions/"
        + "te:label-restriction/te:label-end/"
        + "te:te-label/te:technology" {
    description "OTN label.";
    case otn {
      uses layer1-types:otn-link-label;
    }
  }

  /* Augment label hop of path-route of primary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-primary-paths/te:p2p-primary-path/"
        + "te: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-path-label;
    }
  }

  /* Augment label hop of record-route of primary LSP */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-primary-paths/te:p2p-primary-path/"
        + "te: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-path-label;
    }
  }

  /* Augment label hop of path-route of primary LSP */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-primary-paths/te:p2p-primary-path/"
        + "te: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-path-label;
    }
  }

  /* Augment label hop of route-exclude of reverse primary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-primary-paths/te:p2p-primary-path/"
        + "te:p2p-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-path-label;
    }
  }

  /* Augment label hop of route-include of reverse primary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-primary-paths/te:p2p-primary-path/"
        + "te:p2p-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-path-label;
    }
  }

  /* Augment label hop of route-object-exclude-always of reverse primary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-primary-paths/te:p2p-primary-path/"
        + "te:p2p-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-path-label;
    }
  }

  /* Augment label hop of route-object-include-exclude of reverse primary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-primary-paths/te:p2p-primary-path/"
        + "te:p2p-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-path-label;
    }
  }

  /* Augment label restrictions for the forwarding direction of path-in-segment of reverse primary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-primary-paths/te:p2p-primary-path/"
        + "te:p2p-primary-reverse-path/"
        + "te:path-in-segment/te:label-restrictions/"
        + "te:label-restriction" {
    description "OTN label.";
    uses layer1-types:otn-label-restriction;
  }

  /* Augment label restrictions start for the forwarding direction of path-in-segment of reverse primary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-primary-paths/te:p2p-primary-path/"
        + "te:p2p-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-link-label;
    }
  }

  /* Augment label restrictions end for the forwarding direction of path-in-segment of reverse primary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-primary-paths/te:p2p-primary-path/"
        + "te:p2p-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-link-label;
    }
  }

  /* Augment label restrictions for the forwarding direction of path-out-segment of reverse primary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-primary-paths/te:p2p-primary-path/"
        + "te:p2p-primary-reverse-path/"
        + "te:path-out-segment/te:label-restrictions/"
        + "te:label-restriction" {
    description "OTN label.";
    uses layer1-types:otn-label-restriction;
  }

  /* Augment label restrictions start for the forwarding direction of path-out-segment of reverse primary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-primary-paths/te:p2p-primary-path/"
        + "te:p2p-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-link-label;
    }
  }

  /* Augment label restrictions end for the forwarding direction of path-out-segment of reverse primary path */

  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-primary-paths/te:p2p-primary-path/"
        + "te:p2p-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-link-label;
    }
  }

  /* Augment label hop of path-route of reverse primary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-primary-paths/te:p2p-primary-path/"
        + "te:p2p-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-path-label;
    }
  }

  /* Augment label hop of record-route of reverse primary LSP */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-primary-paths/te:p2p-primary-path/"
        + "te:p2p-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-path-label;
    }
  }

  /* Augment label hop of path-route of reverse primary LSP */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-primary-paths/te:p2p-primary-path/"
        + "te:p2p-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-path-label;
    }
  }

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

    description "OTN label.";
    case otn {
      uses layer1-types:otn-path-label;
    }
  }

  /* Augment label hop of route-include of secondary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-secondary-paths/te:p2p-secondary-path/"
        + "te:optimizations/te:algorithm/te:metric/"
        + "te:optimization-metric/te:explicit-route-include-objects/"
        + "te:route-object-include-object/te:type/te:label/"
        + "te:label-hop/te:te-label/te:technology" {
    description "OTN label.";
    case otn {
      uses layer1-types:otn-path-label;
    }
  }

  /* Augment label hop of route-object-exclude-always of secondary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-secondary-paths/te:p2p-secondary-path/"
        + "te:explicit-route-objects-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-path-label;
    }
  }

  /* Augment label hop of route-object-include-exclude of secondary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-secondary-paths/te:p2p-secondary-path/"
        + "te:explicit-route-objects-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-path-label;
    }
  }

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

    description "OTN label.";
    uses layer1-types:otn-label-restriction;
  }

  /* Augment label restrictions start for the forwarding direction of path-in-segment of secondary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-secondary-paths/te:p2p-secondary-path/"
        + "te:path-in-segment/te:label-restrictions/"
        + "te:label-restriction/te:label-start/"
        + "te:te-label/te:technology" {
    description "OTN label.";
    case otn {
      uses layer1-types:otn-link-label;
    }
  }

  /* Augment label restrictions end for the forwarding direction of path-in-segment of secondary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-secondary-paths/te:p2p-secondary-path/"
        + "te:path-in-segment/te:label-restrictions/"
        + "te:label-restriction/te:label-end/"
        + "te:te-label/te:technology" {
    description "OTN label.";
    case otn {
      uses layer1-types:otn-link-label;
    }
  }

  /* Augment label restrictions for the forwarding direction of path-out-segment of secondary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-secondary-paths/te:p2p-secondary-path/"
        + "te:path-out-segment/te:label-restrictions/"
        + "te:label-restriction" {
    description "OTN label.";
    uses layer1-types:otn-label-restriction;
  }

  /* Augment label restrictions start for the forwarding direction of path-out-segment of secondary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-secondary-paths/te:p2p-secondary-path/"
        + "te:path-out-segment/te:label-restrictions/"
        + "te:label-restriction/te:label-start/"
        + "te:te-label/te:technology" {
    description "OTN label.";
    case otn {
      uses layer1-types:otn-link-label;
    }
  }

  /* Augment label restrictions end for the forwarding direction of path-out-segment of secondary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-secondary-paths/te:p2p-secondary-path/"
        + "te:path-out-segment/te:label-restrictions/"
        + "te:label-restriction/te:label-end/"
        + "te:te-label/te:technology" {
    description "OTN label.";
    case otn {
      uses layer1-types:otn-link-label;
    }
  }

  /* Augment label hop of path-route of secondary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-secondary-paths/te:p2p-secondary-path/"
		+ "te: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-path-label;
    }
  }

  /* Augment label hop of record-route of secondary LSP */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-secondary-paths/te:p2p-secondary-path/"
        + "te: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-path-label;
    }
  }

  /* Augment label hop of path-route of secondary LSP */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-secondary-paths/te:p2p-secondary-path/"
        + "te: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-path-label;
    }
  }

  /* 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-path-label;
    }
  }
/*
  grouping p2p-path-ero {
    description
      "TE tunnel ERO configuration grouping";

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

    }
    container explicit-route-objects-always {
      description "Explicit route objects container";
      list route-object-include-exclude {
        key "index";
        description
          "List of explicit route objects";
        leaf explicit-route-usage {
          type identityref {
            base te-types:route-usage-type;
          }
          description "An explicit-route hop action.";
        }
        uses te-types:explicit-route-hop {
                  augment "type/label/label-hop/te-label/technology" {
                    description "OTN label.";
            case otn {
                  uses layer1-types:otn-path-label;
                }
                  }
                }
      }
    }
  }
*/
/*
  rpc otn-te-tunnel-path-compute {
    description "OTN TE tunnel path computation";
    input {
      list request {
        key "id";
        description "A list of path computation requests.";

        leaf id {
          type uint8;
          description
            "Request ID.";
        }
        leaf type {
          type identityref {
            base te-types:te-tunnel-type;
          }
          description "TE tunnel type.";
        }
        leaf source {
          type inet:ip-address;
          description
            "TE tunnel source address.";
        }

        leaf destination {
          type inet:ip-address;
          description
            "TE tunnel destination address";
        }
        leaf src-tp-id {
          type binary;
          description
            "TE tunnel source termination point identifier.";
        }
        leaf dst-tp-id {
          type binary;
          description
            "TE tunnel destination termination point identifier.";
        }
        leaf switching-layer {
          type identityref {
            base te-types:switching-capabilities;
          }
          description
            "Switching layer where the requests are computed.";
        }
        leaf encoding {
          type identityref {
            base te-types:lsp-encoding-types;
          }
          description "LSP encoding type";
        }
        leaf protection-type {
          type identityref {
            base te-types:lsp-protection-type;
          }
          description "LSP protection type";
        }
        leaf restoration-type {
          type identityref {
            base te-types:lsp-restoration-type;
          }
          description "LSP restoration type";
        }
        leaf provider-id {
          type te-types:te-global-id;
          description
            "An identifier to uniquely identify a provider.";
        }
        leaf client-id {
          type te-types:te-global-id;
          description

            "An identifier to uniquely identify a client.";
        }
        leaf te-topology-id {
          type te-types:te-topology-id;
          description
            "It is presumed that a datastore will contain many
             topologies. To distinguish between topologies it is
             vital to have UNIQUE topology identifiers.";
        }
        leaf setup-priority {
          type uint8 {
            range "0..7";
          }
          description
            "TE LSP setup priority";
        }
        leaf hold-priority {
          type uint8 {
            range "0..7";
          }
          description
            "TE LSP hold priority";
        }
        leaf te-path-metric-type {
          type identityref {
            base te-types:path-metric-type;
          }
          default te-types:path-metric-te;
          description
            "The tunnel path metric type.";
        }

        leaf odu-type {
          type identityref{
            base layer1-types:odu-type;
          }
          description "Type of ODU";
        }
        container p2p-primary-paths {
          description "Set of P2P primary paths container";
          list p2p-primary-path {
            key "name";
            description
              "List of primary paths for this tunnel.";
            leaf name {
              type string;
              description "TE path name";
            }

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

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

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

<CODE ENDS>

 
    

6. 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: zhengyl@dimpt.com

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

Lei Wang
China Mobile
Email: wangleiyj@chinamobile.com

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

10. References

10.1. Normative References

[I-D.ietf-ccamp-otn-topo-yang] Zheng, H., Guo, A., Busi, I., Sharma, A., Liu, X., Belotti, S., Xu, Y., Wang, L. and O. Dios, "A YANG Data Model for Optical Transport Network Topology", Internet-Draft draft-ietf-ccamp-otn-topo-yang-08, September 2019.
[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 and Interfaces", Internet-Draft draft-ietf-teas-yang-te-21, April 2019.
[ITU-Tg709] International Telecommunication Union, "Interfaces for the optical transport network", ITU-T G.709, June 2016.
[RFC3688] Mealling, M., "The IETF XML Registry", BCP 81, RFC 3688, DOI 10.17487/RFC3688, January 2004.
[RFC6241] Enns, R., Bjorklund, M., Schoenwaelder, J. and A. Bierman, "Network Configuration Protocol (NETCONF)", RFC 6241, DOI 10.17487/RFC6241, June 2011.
[RFC6242] Wasserman, M., "Using the NETCONF Protocol over Secure Shell (SSH)", RFC 6242, DOI 10.17487/RFC6242, June 2011.
[RFC7139] Zhang, F., 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.
[RFC7950] Bjorklund, M., "The YANG 1.1 Data Modeling Language", RFC 7950, DOI 10.17487/RFC7950, August 2016.
[RFC8040] Bierman, A., Bjorklund, M. and K. Watsen, "RESTCONF Protocol", RFC 8040, DOI 10.17487/RFC8040, January 2017.
[RFC8341] Bierman, A. and M. Bjorklund, "Network Configuration Access Control Model", STD 91, RFC 8341, DOI 10.17487/RFC8341, March 2018.
[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.
[RFC8446] Rescorla, E., "The Transport Layer Security (TLS) Protocol Version 1.3", RFC 8446, DOI 10.17487/RFC8446, August 2018.

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", Internet-Draft draft-ietf-ccamp-transport-nbi-app-statement-06, September 2019.
[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", Internet-Draft draft-ietf-teas-actn-yang-04, August 2019.
[RFC7062] Zhang, F., 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.
[RFC7138] Ceccarelli, D., 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.
[RFC8340] Bjorklund, M. and L. Berger, "YANG Tree Diagrams", BCP 215, RFC 8340, DOI 10.17487/RFC8340, March 2018.

Authors' Addresses

Haomian Zheng Huawei Technologies H1-1-A043S Huawei Industrial Base, Songshanhu 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
Victor Lopez Telefonica EMail: victor.lopezalvarez@telefonica.com
Yunbin Xu CAICT EMail: xuyunbin@ritt.cn