CCAMP Working Group                                             H. Zheng
Internet-Draft                                                    Z. Fan                                                    A. Guo
Intended status: Standards Track                     Huawei Technologies                                 I. Busi
Expires: May 3, December 21, 2018                           Huawei Technologies
                                                               A. Sharma
                                                                  Google
                                                                  R. Rao
                                                                Infinera
                                                              S. Belotti
                                                                   Nokia
                                                                V. Lopez
                                                              Telefonica
                                                                   Y. Li
                                                            China Mobile
                                                                   Y. Xu
                                                                   CAICT
                                                        October 30, 2017
                                                           June 19, 2018

                         OTN Tunnel YANG Model
                  draft-ietf-ccamp-otn-tunnel-model-01
                  draft-ietf-ccamp-otn-tunnel-model-02

Abstract

   This document describes the YANG data model for OTN Tunnels.

Status of This Memo

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

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   This Internet-Draft will expire on May 3, December 21, 2018.

Copyright Notice

   Copyright (c) 2017 2018 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terminology and Notations . . . . . . . . . . . . . . . . . .   2
   3.  OTN Tunnel Model Overview Description  . . . . . . . . . . . . . . . .   3
     3.1.  Overview of OTN Tunnel Model  . . . . . . . . . . . . . .   3
     3.1.  Mux Service
     3.2.  OTN-specific Parameters in Multi-Domain OTN Network Tunnel Model . . . . . . . . .   3
     3.2.  Bookended and Non-BookEnded
     3.3.  OTN Tunnel Path Compute RPC  . . . . . . . . .   4
     3.3.  Network and Client side tunnel services . . . . . . . . .   4
     3.4.
   4.  OTN Tunnel YANG Tree  . . . . . . . . . . . . . . . . . . . .   4
     3.5.
   5.  OTN Tunnel YANG Code  . . . . . . . . . . . . . . . . . .   8
     3.6. . .  12
   6.  OTN Types YANG Code . . . . . . . . . . . . . . . . . . .  18
   4. . .  30
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .  26
   5.  42
   8.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  26
   6.  42
   9.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  26
   7.  42
   10. Contributors  . . . . . . . . . . . . . . . . . . . . . . . .  26
   8.  42
   11. References  . . . . . . . . . . . . . . . . . . . . . . . . .  43
     11.1.  Normative References . . . . . . . . . . . . . . . . . .  43
     11.2.  Informative References . . . . . . . . . . . . . . . .  27 .  44
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  27  44

1.  Introduction

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

   This document provides YANG model for creating OTN tunnel.  The model
   augments the TE Tunnel model, which is an abstract model to create TE
   Tunnels. model.

2.  Terminology and Notations

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

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

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

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

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

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

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

3.  OTN Tunnel Model Overview Description

3.1.  Mux Service in Multi-Domain OTN Network

                                 OTN Mux Service
                     <--------------------------------->

     XXXXXXXXXXX          XXXXXXXXXXXXXXXXXXXXXXXXX         XXXXXXXXX
    XX         XX       XX                        XX      XX         XX
   XX   +---+    X      XX +---+           +---+    X     XX  +---+   XX
   X    |NE1+--------+-----+NE2+-----------+NE3+--------+-X---+NE4|    X
   X    +---+   XX   ^  X  +---+           +---+   XX   ^ XX  +---+    X
    XX         XX    |   XX                       XX    |  XX        XX
     XXXXXXXXXXX     |    XXXXXXXXXXXXXXXXXXXXXXXXX     |   XXXXXXXXX
       Domain-1      |            Domain-2              |    Domain-3
                     +                                  +
         Same OTN Service attributes:      Same  Overview of OTN Service attributes:
         1. Client Signal                  1. Client Signal
         2. Tributary Port Number          2. Tributary Port Number
         3. Tributary Slot Granularity     3. Tributary Slot Granularity
         4. Tributary Slots                4. Tributary Slots

       Figure 1: Tunnel Model

   The OTN Mux Service in a multi-domain network topology

   Figure 1 shows tunnel model is using TE tunnel [I-D.ietf-teas-yang-te] as a multi-domain OTN network with three domains.  In
   this example, user wants to setup an end-to-end OTN service that
   passes through Domain-2.  In order to create an OTN mux service in
   Domain-2, user will need
   basic model and augment to specify the exact details of the client
   side LO-ODU on NE2 and NE3, so that these service endpoints can be
   paired TE tunnel with OTN-specific
   parameters, including the LO-ODU endpoints on NE1 bandwidth information and NE4, respectively.

   Let's assume that ODU4 label
   information.  It is also worth noting that the client side HO-ODU OTN tunnel
   provisioning is usually based on NE2 and NE3, and the client signal is ODU2.  User will need to specify OTN topology.  Therefore the OTN client
   signal (ODU2
   tunnel model is usually used together with OTN topology model
   specified in this example), the Tributary Port Number (TPN),
   Tributary Slot Granularities (TSG) [I-D.ietf-ccamp-otn-topo-yang].

   More scenarios and tributary slots to model applications can be used.
   As shown found in the figure above, these service parameters must be the
   same between NE1 and NE2,
   [I-D.ietf-ccamp-transport-nbi-app-statement] and NE3
   [I-D.ietf-teas-actn-yang].  The current model is following the YANG
   language specification as [RFC7950], and NE4.

   Once the OTN Mux service corresponding protocol
   is setup recommended to be Netconf protocol in [RFC6241] or RESTconf
   protocol in [RFC8040].

3.2.  OTN-specific Parameters in Domain-2, Tunnel Model

   OTN specific parameters have been augmenting to the incoming signal
   from either NE1 and/or NE4 will be switched inside Domain-2, and
   delivered to NE at the other end.

3.2.  Bookended and Non-BookEnded OTN Tunnel

   OTN TE tunnel model provides support for models.
   The attributes on both bookended and non-
   bookended OTN tunnels.

   For bookended tunnels, of the same client signal is present on source and destination endpoints.  For example, ODU2e bookended tunnel will
   have need to be
   configured when setting up the same ODU2e tunnel.  Typical parameters, including
   client signal at both source signal, TPN, TSG and destination
   endpoints.

   For non-bookended tunnels, different client signals corresponding tributary slot information,
   are present on
   source and destination endpoints.  For example, required in the client signal can
   be ODU2e on OTN tunnel model.  These parameters are
   consistent with the source endpoint framework in [RFC7062], and the handoff at the destination
   can be 10GbE-LAN client signal.

3.3.  Network specification in
   [RFC7138] and Client side tunnel services [RFC7139].

   The OTN tunnel model provides support for both network bandwidth information has been augmenting to network various sections
   of TE tunnel models, including tunnel bandwidth, primary path
   bandwidth and
   client to client tunnels.  For network so on.  The OTN label information has been augmenting
   to network tunnel, network
   termination points on source and destination node represent source label hop of a group of routing objects and destination endpoints.  For client to client also LSPs.

3.3.  OTN Path Compute RPC

   Similarly with TE tunnel, client
   termination points on source and destination node represent source
   and destination endpoints.

   If a client to client 'compute-only' mode of OTN tunnel needs model
   is also supported by specifing a Remote Procedural Call (RPC).  On
   receiving this RPC, the provider is expected to use one or more HO (or server)
   network compute the available
   path subject to network tunnels, ERO and routing constraints, defined in the base TE model, can be used constraints specified in RPC and feedback to route the
   client without any changing of the OTN network.  Given the OTN tunnel
   computed, the client may query and/or subscribe on the tunnel over one or
   more server tunnels.

3.4. to be
   notified whenever it changes.

4.  OTN Tunnel YANG Tree

module: ietf-otn-tunnel
  augment /te:te/te:tunnels/te:tunnel:
    +--rw payload-treatment?          enumeration
    +--rw src-client-signal?          identityref
    +--rw src-tpn?                    uint16
    +--rw src-tsg?                    identityref
    +--rw src-tributary-slot-count?   uint16
    +--rw src-tributary-slots
    |  +--rw values*   uint8
    +--rw dst-client-signal?          identityref
    +--rw dst-tpn?                    uint16
    +--rw dst-tsg?                    identityref
    +--rw dst-tributary-slot-count?   uint16
    +--rw dst-tributary-slots
       +--rw values*   uint8

  rpcs:
    +---x otn-te-tunnel-path-compute
       +---w input
       |  +---w request* [id]
       |     +---w id                          uint8
       |     +---w type?
  augment /te:te/te:globals/te:named-path-constraints
          /te:named-path-constraint/te:te-bandwidth/te:technology:
    +--:(otn)
       +--rw odu-type?   identityref
       |     +---w source?                     inet:ip-address
       |     +---w destination?                inet:ip-address
       |     +---w src-tp-id?                  binary
       |     +---w dst-tp-id?                  binary
       |     +---w switching-layer?
  augment /te:te/te:tunnels/te:tunnel/te:te-bandwidth/te:technology:
    +--:(otn)
       +--rw odu-type?   identityref
       |     +---w encoding?
  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
       |     +---w protection-type?
  augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths
          /te:p2p-primary-path/te:p2p-reverse-primary-path
          /te:te-bandwidth/te:technology:
    +--:(otn)
       +--rw odu-type?   identityref
       |     +---w restoration-type?
  augment /te:te/te:tunnels/te:tunnel/te:p2p-secondary-paths
          /te:p2p-secondary-path/te:te-bandwidth/te:technology:
    +--:(otn)
       +--rw odu-type?   identityref
       |
  augment /te:te/te:globals/te:named-path-constraints
          /te:named-path-constraint/te:explicit-route-objects
          /te:route-object-exclude-always/te:type/te:label
          /te:label-hop/te:te-label/te:technology:
    +--:(otn)
       +--rw tpn?       uint16
       +--rw tsg?       identityref
       +--rw ts-list?   string
  augment /te:te/te:globals/te:named-path-constraints
          /te:named-path-constraint/te:explicit-route-objects
          /te:route-object-include-exclude/te:type/te:label
          /te:label-hop/te:te-label/te:technology:
    +--:(otn)
       +--rw tpn?       uint16
       +--rw tsg?       identityref
       +--rw ts-list?   string
  augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths
          /te:p2p-primary-path/te:explicit-route-objects
          /te:route-object-exclude-always/te:type/te:label
          /te:label-hop/te:te-label/te:technology:
    +--:(otn)
       +--rw tpn?       uint16
       +--rw tsg?       identityref
       +--rw ts-list?   string
  augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths
          /te:p2p-primary-path/te:explicit-route-objects
          /te:route-object-include-exclude/te:type/te:label
          /te:label-hop/te:te-label/te:technology:
    +--:(otn)
       +--rw tpn?       uint16
       +--rw tsg?       identityref
       +--rw ts-list?   string
  augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths
          /te:p2p-primary-path/te: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:state/te:path-properties
          /te:path-route-objects/te:path-computed-route-object
          /te:state/te:type/te:label/te:label-hop/te:te-label
          /te:technology:
    +--:(otn)
       +--ro tpn?       uint16
       +--ro tsg?       identityref
       +--ro ts-list?   string
  augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths
          /te:p2p-primary-path/te:state/te:lsps/te:lsp
          /te:path-properties/te:path-route-objects
          /te:path-computed-route-object/te:state/te:type/te:label
          /te:label-hop/te:te-label/te:technology:
    +--:(otn)
       +--ro tpn?       uint16
       +--ro tsg?       identityref
       +--ro ts-list?   string
  augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths
          /te:p2p-primary-path/te:p2p-reverse-primary-path
          /te:explicit-route-objects/te:route-object-exclude-always
          /te:type/te:label/te:label-hop/te:te-label/te:technology:
    +--:(otn)
       +--rw tpn?       uint16
       +--rw tsg?       identityref
       +--rw ts-list?   string
  augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths
          /te:p2p-primary-path/te:p2p-reverse-primary-path
          /te:explicit-route-objects/te:route-object-include-exclude
          /te:type/te:label/te:label-hop/te:te-label/te:technology:
    +--:(otn)
       +--rw tpn?       uint16
       +--rw tsg?       identityref
       +--rw ts-list?   string
  augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths
          /te:p2p-primary-path/te:p2p-reverse-primary-path
          /te:optimizations/te:algorithm/te:metric
          /te:optimization-metric/te:explicit-route-exclude-objects
          /te:route-object-exclude-object/te:type/te:label
          /te:label-hop/te:te-label/te:technology:
    +--:(otn)
       +--rw tpn?       uint16
       +--rw tsg?       identityref
       +--rw ts-list?   string
  augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths
          /te:p2p-primary-path/te:p2p-reverse-primary-path
          /te:optimizations/te:algorithm/te:metric
          /te:optimization-metric/te:explicit-route-include-objects
          /te:route-object-include-object/te:type/te:label
          /te:label-hop/te:te-label/te:technology:
    +--:(otn)
       +--rw tpn?       uint16
       +--rw tsg?       identityref
       +--rw ts-list?   string
  augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths
          /te:p2p-primary-path/te:p2p-reverse-primary-path/te:state
          /te:path-properties/te:path-route-objects
          /te:path-computed-route-object/te:state/te:type/te:label
          /te:label-hop/te:te-label/te:technology:
    +--:(otn)
       +--ro tpn?       uint16
       +--ro tsg?       identityref
       +--ro ts-list?   string
  augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths
          /te:p2p-primary-path/te:p2p-reverse-primary-path/te:state
          /te:lsps/te:lsp/te:path-properties/te:path-route-objects
          /te:path-computed-route-object/te:state/te:type/te:label
          /te:label-hop/te:te-label/te:technology:
    +--:(otn)
       +--ro tpn?       uint16
       +--ro tsg?       identityref
       +--ro ts-list?   string
  augment /te:te/te:tunnels/te:tunnel/te:p2p-secondary-paths
          /te:p2p-secondary-path/te:explicit-route-objects
          /te:route-object-exclude-always/te:type/te:label
          /te:label-hop/te:te-label/te:technology:
    +--:(otn)
       +--rw tpn?       uint16
       +--rw tsg?       identityref
       +--rw ts-list?   string
  augment /te:te/te:tunnels/te:tunnel/te:p2p-secondary-paths
          /te:p2p-secondary-path/te:explicit-route-objects
          /te:route-object-include-exclude/te:type/te:label
          /te:label-hop/te:te-label/te:technology:
    +--:(otn)
       +--rw tpn?       uint16
       +--rw tsg?       identityref
       +--rw ts-list?   string
  augment /te:te/te:tunnels/te:tunnel/te:p2p-secondary-paths
          /te:p2p-secondary-path/te: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:state/te:path-properties
          /te:path-route-objects/te:path-computed-route-object/te:state
          /te:type/te:label/te:label-hop/te:te-label/te:technology:
    +--:(otn)
       +--ro tpn?       uint16
       +--ro tsg?       identityref
       +--ro ts-list?   string
  augment /te:te/te:tunnels/te:tunnel/te:p2p-secondary-paths
          /te:p2p-secondary-path/te:state/te:lsps/te:lsp
          /te:path-properties/te:path-route-objects
          /te:path-computed-route-object/te:state/te:type/te:label
          /te:label-hop/te:te-label/te:technology:
    +--:(otn)
       +--ro tpn?       uint16
       +--ro tsg?       identityref
       +--ro ts-list?   string

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

3.5. tsg?         identityref
                                     |     +--ro ts-list?     string
                                     +--ro direction?   te-label-direction

5.  OTN Tunnel YANG Code

<CODE BEGINS>file "ietf-otn-tunnel@2017-10-30.yang" "ietf-otn-tunnel@2018-06-07.yang"

module ietf-otn-tunnel {
  yang-version 1.1;
  namespace "urn:ietf:params:xml:ns:yang:ietf-otn-tunnel";
  prefix "otn-tunnel";

  import ietf-te {
    prefix "te";
  }

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

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

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

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

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

     Editor: Zheyu Fan
                <mailto:fanzheyu2@huawei.com> Aihua Guo
             <mailto:aihuaguo@huawei.com>

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

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

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

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

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

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

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

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

  revision "2017-10-30" "2018-06-07" {
    description
      "Revision 0.4"; 0.5";
    reference
         "draft-ietf-ccamp-otn-tunnel-model-01.txt";
      "draft-ietf-ccamp-otn-tunnel-model-02";
  }

 /*
  * Groupings
  */

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

    leaf payload-treatment {
      type enumeration {
        enum switching {
          description "Client signal is switched to another tunnel
                       in this domain";
        }
        enum transport {
          description "Client signal is transparently transmitted
                       in this domain";
        }
      }
      default switching;
      description
        "Treatment of the incoming payload. Payload can be switched
         or transported.";
    }

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

    leaf src-tpn {
      type uint16 {
        range "0..4095";

      }
      description
        "Tributary Port Number. Applicable in case of mux services";
      reference
        "RFC7139: GMPLS Signaling Extensions for Control of Evolving
         G.709 Optical Transport Networks";
    }

    leaf src-tsg {
      type identityref {
        base otn-types:tributary-slot-granularity;
      }
      description
        "Tributary slot granularity.
         Applicable in case of mux services";
      reference
        "G.709/Y.1331, February 2016: Interfaces for the
         Optical Transport Network (OTN)";
    }

    leaf src-tributary-slot-count {
      type uint16;
      description
        "Number of tributary slots used at the source.";
    }

    container src-tributary-slots {
      description
        "A list of tributary slots used by the client service.
         Applicable in case of mux services";
      leaf-list values {
        type uint8;
          description
            "Tributary tributary slot value";
          reference
            "G.709/Y.1331, February 2016: Interfaces for the
             Optical Transport Network (OTN)";
      }
    }

    leaf dst-client-signal {
      type identityref {
        base otn-types:client-signal;
      }
      description
        "Client signal at the destination endpoint of the tunnel";
    }
    leaf dst-tpn {
      type uint16 {
        range "0..4095";
      }
      description
        "Tributary Port Number. Applicable in case of mux services";
      reference
        "RFC7139: GMPLS Signaling Extensions for Control of Evolving
         G.709 Optical Transport Networks.";
    }

    leaf dst-tsg {
      type identityref {
        base otn-types:tributary-slot-granularity;
      }
      description
        "Tributary slot granularity.
         Applicable in case of mux services";
      reference
        "G.709/Y.1331, February 2016: Interfaces for the
         Optical Transport Network (OTN)";
    }

    leaf dst-tributary-slot-count {
      type uint16;
      description
        "Number of tributary slots used at the destination.";
    }

    container dst-tributary-slots {
      description
        "A list of tributary slots used by the client service.
         Applicable in case of mux services";
      leaf-list values {
        type uint8;
        description
          "Tributary slot value";
        reference
          "G.709/Y.1331, February 2016: Interfaces for the
           Optical Transport Network (OTN)";
      }
    }
  }

  /*
  Note: Comment has been given to authors of TE Tunnel model to add
  list of endpoints under config to support P2MP tunnel.
  */

 /*
  * Data nodes
  */

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

  /*
   * Augment TE bandwidth
   */

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

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

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

  /* Augment bandwidth of reverse primary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-primary-paths/te:p2p-primary-path/"
        + "te:p2p-reverse-primary-path/"
        + "te:te-bandwidth/te:technology" {

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

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

  /*
   * Augment TE label.
   */

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

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

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

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

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

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

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

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

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

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

    }
  }

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

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

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

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

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

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

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

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

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

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

  /* Augment label hop of label hop of path-route of secondary path */
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:p2p-secondary-paths/te:p2p-secondary-path/"
        + "te:state/te:path-properties/te:path-route-objects/"
        + "te:path-computed-route-object/te:state/te:type/te:label/"
        + "te:label-hop/te:te-label/te:technology" {

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

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

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

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

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

    leaf te-default-metric {
      type uint32;
      description
        "Traffic engineering metric.";
    }
    leaf te-delay-metric {
      type uint32;
      description
        "Traffic engineering delay metric.";
    }
    leaf te-hop-metric {
      type uint32;
      description
        "Traffic engineering hop metric.";
    }
    container explicit-route-objects {
      description "Explicit route objects container";
      list explicit-route-object {
        key "index";
        description
          "List of explicit route objects";
        leaf explicit-route-usage {
          type identityref {
            base te-types:route-usage-type;
          }
          description "An explicit-route hop action.";
        }
        uses te-types:explicit-route-hop_config; te-types:explicit-route-hop {
                  augment "type/label/label-hop/te-label/technology" {
                    description "OTN label.";
            case otn {
                  uses otn-types:otn-path-label;
                }
                  }
                }
      }
    }
  }

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

3.6.

6.  OTN Types YANG Code

<CODE BEGINS> file "ietf-otn-types@2017-10-30.yang" "ietf-otn-types@2018-06-07.yang"

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

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

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

     Editor: Zheyu Fan
                <mailto:fanzheyu2@huawei.com> Aihua Guo
             <mailto:aihuaguo@huawei.com>

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

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

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

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

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

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

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

  description
    "This module defines OTN types.";

  revision "2017-10-30" "2018-06-07" {
    description
      "Revision 0.4"; 0.5";
    reference
         "draft-ietf-ccamp-otn-tunnel-model-01.txt";
      "draft-ietf-ccamp-otn-tunnel-model-02";
  }

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

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

  identity tsg-2.5G {
    base tributary-slot-granularity;
    description
      "2.5G tributary slot granularity";
  }
/*
  identity tsg-1.25Gand2.5G {
    base tributary-slot-granularity;
    description
      "Both 1.25G and 2.5G tributary slot granularity";
  }
*/
  identity tributary-protocol-type {
    description
      "Base identity for protocol framing used by tributary signals";
  }

  identity prot-OTU1 {
    base tributary-protocol-type;
    description
      "OTU1 protocol (2.66G)";
  }
/*
  identity prot-OTU1e {
    base tributary-protocol-type;
    description
      "OTU1e type (11.04G)";
  }

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

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

  }
/*
  identity prot-OTU3e1 {
    base tributary-protocol-type;
    description
      "OTU3e1 type (44.57G)";
  }

  identity prot-OTU3e2 {
    base tributary-protocol-type;
    description
      "OTU3e2 type (44.58G)";
  }
*/
  identity prot-OTU4 {
    base tributary-protocol-type;
    description
      "OTU4 type (111.80G)";
  }

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

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

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

  identity prot-ODU1f {
    base tributary-protocol-type;
    description
      "ODU1f protocol (10.56G).";

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  identity client-signal-ODU3 {
    base client-signal;
    description
      "Client signal type of ODU3 (40.31G)";
  }
/*
  identity client-signal-ODU3e2 {
    base client-signal;
    description
      "Client signal type of ODU3e2 (41.78G)";
  }
*/
  identity client-signal-ODU4 {
    base client-signal;
    description
      "Client signal type of ODU4 (104.79G)";
  }

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

  identity client-signal-ODUflex-gfp {
    base client-signal;
    description
      "Client signal type of 1GbE"; ODU Flex GFP";
  }

  identity client-signal-10GbE-LAN client-signal-ODUCn {
    base client-signal;
    description
      "Client signal type of 10GbE LAN"; ODUCn (beyond 100G)";
  }

  identity client-signal-10GbE-WAN client-signal-FC400 {
    base client-signal;
    description
      "Client signal type of 10GbE WAN"; Fibre Channel FC400";
  }

  identity client-signal-40GbE client-signal-FC800 {
    base client-signal;
    description
      "Client signal type of 40GbE"; Fibre Channel FC800";
  }

  identity client-signal-100GbE client-signal-FICON-4G {
    base client-signal;
    description
      "Client signal type of 100GbE"; Fibre Connection 4G";
  }

  identity client-signal-OC3_STM1 client-signal-FICON-8G {
    base client-signal;
    description
      "Client signal type of OC3 & STM1"; Fibre Connection 8G";
  }

  identity client-signal-OC12_STM4 client-signal-OTU1 {
    base client-signal;
    description
      "Client signal type of OC12 & STM4"; OTU1";
  }

  identity client-signal-OC48_STM16 client-signal-OTU2 {
    base client-signal;
    description
      "Client signal type of OC48 & STM16"; OTU2";
  }

  identity client-signal-OC192_STM64 client-signal-OTU2e {
    base client-signal;
    description
      "Client signal type of OC192 & STM64"; OTU2e";
  }

  identity client-signal-OC768_STM256 client-signal-OTU3 {
    base client-signal;
    description
      "Client signal type of OC768 & STM256"; OTU3";
  }

  identity client-signal-ODU0 client-signal-OTU4 {
    base client-signal;
    description
      "Client signal type of ODU0 (1.24G)"; OTU4";
  }

  identity client-signal-ODU1 otn-label-range-type {
       base client-signal;
    description
         "ODU1 protocol (2.49G)";
      "Base identity from which specific OTN label
           range types derived";
  }

  identity client-signal-ODU2 label-range-trib-slot {
    base client-signal; otn-label-range-type;
    description
         "Client signal type
      "Defines a range of ODU2 (10.03G)"; OTN tributary slots";
  }

  identity client-signal-ODU2e label-range-trib-port {
    base client-signal; otn-label-range-type;
    description
         "Client signal type
      "Defines a range of ODU2e (10.39G)"; OTN tributary ports";
  }

     identity client-signal-ODU3

  grouping otn-link-bandwidth {
    list odulist {
      key "odu-type";
      description
        "OTN bandwidth definition";
      leaf odu-type {
        type identityref {
          base client-signal; otn-types:tributary-protocol-type;
        }
        description
         "Client signal "ODU type";
      }
      leaf number {
        type uint16;
        description "Number of ODU3 (40.31G)"; ODUs";
      }
   /*
     identity client-signal-ODU3e2
    }
  }

  grouping otn-path-bandwidth {
    leaf odu-type {
      type identityref {
        base client-signal; otn-types:tributary-protocol-type;
      }
      description
         "Client signal "ODU type";
    }
  }

  grouping otn-label-restriction {
    leaf range-type {
      type of ODU3e2 (41.78G)"; identityref {
        base otn-types:otn-label-range-type;
      }
   */
     identity client-signal-ODU4
    }
    leaf tsg {
      type identityref {
        base client-signal; otn-types:tributary-slot-granularity;
      }
      description
         "Client signal "Tributary slot granularity.";
      reference
        "G.709/Y.1331, February 2016: Interfaces for the
         Optical Transport Network (OTN)";
    }
    leaf priority {
      type of ODU4 (104.79G)"; uint8;
      description "priority.";
    }

     identity client-signal-ODUflex-cbr
  }

  grouping otn-link-label {
    choice otn-label-type {
       base client-signal;
      description
         "Client signal
        "OTN label type";
      case tributary-port {
        leaf tpn {
          type uint16 {
            range "1..4095";
          }
          description
            "Tributary Port Number. Applicable in case of mux services.";
          reference
            "RFC7139: GMPLS Signaling Extensions for Control of Evolving
             G.709 Optical Transport Networks.";
        }
      }
      case tributary-slot {
        leaf ts {
          type uint16 {
            range "1..4095";
          }
          description
            "Tributary Slot Number. Applicable in case of mux services.";
          reference
            "RFC7139: GMPLS Signaling Extensions for Control of ODU Flex CBR"; Evolving
             G.709 Optical Transport Networks.";
        }

     identity client-signal-ODUflex-gfp
      }
    }
  }

  grouping otn-path-label {
    leaf tpn {
       base client-signal;
       description
         "Client signal
      type of ODU Flex GFP";
     }

     identity client-signal-ODUCn uint16 {
       base client-signal;
        range "1..4095";
      }
      description
         "Client signal type
        "Tributary Port Number. Applicable in case of ODUCn (beyond 100G)"; mux services.";
      reference
        "RFC7139: GMPLS Signaling Extensions for Control of Evolving
         G.709 Optical Transport Networks.";
    }
     identity client-signal-FC400
    leaf tsg {
       base client-signal;
       description
         "Client signal
      type of Fibre Channel FC400";
     }

     identity client-signal-FC800 identityref {
        base client-signal; otn-types:tributary-slot-granularity;
      }
      description
         "Client signal type of Fibre Channel FC800"; "Tributary slot granularity.";
      reference
        "G.709/Y.1331, February 2016: Interfaces for the
         Optical Transport Network (OTN)";

    }

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

     identity client-signal-FICON-8G string {
       base client-signal;
          pattern "([1-9][0-9]{0,3}(-[1-9][0-9]{0,3})?"
                + "(,[1-9][0-9]{0,3}(-[1-9][0-9]{0,3})?)*)";
        }
        description
         "Client signal type
          "A list of Fibre Connection 8G"; available tributary slots ranging
           between 1 and 9999.
           For example 1-20,25,50-1000";
        reference "RFC 7139: GMPLS Signaling Extensions for Control
                   of Evolving G.709 Optical Transport Networks";
    }
  }
}

<CODE ENDS>

4.

7.  Security Considerations

   TBD.

5.

8.  IANA Considerations

   TBD.

6.

9.  Acknowledgements

   TBD.

7.

10.  Contributors

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

   Yanlei Zheng
   China Unicom
   Email: zhengyl@dimpt.com

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

   Lei Wang
   China Mobile
   Email: wangleiyj@chinamobile.com

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

8.

11.  References

11.1.  Normative References

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

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

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

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

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

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

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

11.2.  Informative References

   [I-D.ietf-netmod-yang-tree-diagrams]
              Bjorklund, M. and L. Berger, "YANG Tree Diagrams", draft-
              ietf-netmod-yang-tree-diagrams-02
              ietf-netmod-yang-tree-diagrams-06 (work in progress),
              February 2018.

   [I-D.ietf-teas-actn-yang]
              Lee, Y., zhenghaomian@huawei.com, z., Ceccarelli, D.,
              Yoon, B., and S. Belotti, "Applicability of YANG models
              for Abstraction and Control of Traffic Engineered
              Networks", draft-ietf-teas-actn-yang-01 (work in
              progress),
              October 2017. February 2018.

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

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

Authors' Addresses

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

   Email: zhenghaomian@huawei.com

   Zheyu Fan

   Aihua Guo
   Huawei Technologies
   F3 R&D Center,
   12007 Sunrise Valley Drive, Suite 325
   Reston, VA  20171
   U.S.A

   Email: aihuaguo@huawei.com
   Italo Busi
   Huawei Industrial Base, Bantian, Longgang District
   Shenzhen, Guangdong  518129
   P.R.China Technologies
   HUAWEI TECHNOLOGIES ITALIA Srl Centro Direzionale Milano 2
   Milan, Milan  20090
   Italy

   Email: fanzheyu2@huawei.com Italo.Busi@huawei.com

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

   Email: ansha@google.com

   Rajan Rao
   Infinera
   169 Java Drive
   Sunnyvale, CA  94089
   USA

   Email: rrao@infinera.com

   Sergio Belotti
   Nokia

   Email: sergio.belotti@nokia.com

   Victor Lopez
   Telefonica

   Email: victor.lopezalvarez@telefonica.com

   Yunbo Li
   China Mobile

   Email: liyunbo@chinamobile.com
   Yunbin Xu
   CAICT

   Email: xuyunbin@ritt.cn