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Versions: 00 01 02 draft-ietf-ccamp-otn-tunnel-model

CCAMP Working Group                                             X. Zhang
Internet-Draft                                                  K. Xiang
Intended status: Standards Track                     Huawei Technologies
Expires: September 12, 2017                                    A. Sharma
                                                                  R. Rao
                                                                Infinera
                                                          March 11, 2017


                         OTN Tunnel YANG Model
                 draft-sharma-ccamp-otn-tunnel-model-01

Abstract

   This document describes the YANG data model for OTN Tunnels.

Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in [RFC2119].

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 http://datatracker.ietf.org/drafts/current/.

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

   This Internet-Draft will expire on September 12, 2017.

Copyright Notice

   Copyright (c) 2017 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
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents



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   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terminology and Notations . . . . . . . . . . . . . . . . . .   2
   3.  Model Overview  . . . . . . . . . . . . . . . . . . . . . . .   3
     3.1.  Mux Service in Multi-Domain OTN Network . . . . . . . . .   3
     3.2.  Bookended and Non-BookEnded OTN Tunnel  . . . . . . . . .   4
     3.3.  Network and Client side tunnel services . . . . . . . . .   4
     3.4.  OTN Tunnel YANG Tree  . . . . . . . . . . . . . . . . . .   4
     3.5.  OTN Tunnel YANG Code  . . . . . . . . . . . . . . . . . .   5
     3.6.  Transport Types YANG Code . . . . . . . . . . . . . . . .  10
   4.  Security Considerations . . . . . . . . . . . . . . . . . . .  19
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  19
   6.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  19
   7.  Normative References  . . . . . . . . . . . . . . . . . . . .  19
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  19

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.

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 . 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).




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   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.  Model Overview

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 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: OTN Mux Service in a multi-domain network topology

   Figure 1 shows 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 to specify the exact details of the client
   side LO-ODU on NE2 and NE3, so that these service endpoints can be
   paired with the LO-ODU endpoints on NE1 and NE4, respectively.

   Let's assume that ODU4 is the client side HO-ODU on NE2 and NE3, and
   the client signal is ODU2.  User will need to specify the OTN client
   signal (ODU2 in this example), the Tributary Port Number (TPN),
   Tributary Slot Granularities (TSG) and tributary slots to be used.




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   As shown in the figure above, these service parameters must be the
   same between NE1 and NE2, and NE3 and NE4.

   Once the OTN Mux service is setup in Domain-2, 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 tunnel model provides support for both bookended and non-
   bookended OTN tunnels.

   For bookended tunnels, the same client signal is present on source
   and destination endpoints.  For example, ODU2e bookended tunnel will
   have the same ODU2e client signal at both source and destination
   endpoints.

   For non-bookended tunnels, different client signals are present on
   source and destination endpoints.  For example, the client signal can
   be ODU2e on the source endpoint and the handoff at the destination
   can be 10GbE-LAN client signal.

3.3.  Network and Client side tunnel services

   The OTN tunnel model provides support for both network to network and
   client to client tunnels.  For network to network tunnel, network
   termination points on source and destination node represent source
   and destination endpoints.  For client to client tunnel, client
   termination points on source and destination node represent source
   and destination endpoints.

   If a client to client tunnel needs to use one or more HO (or server)
   network to network tunnels, ERO and routing constraints, defined in
   the base TE model, can be used to route the client tunnel over one or
   more server tunnels.

3.4.  OTN Tunnel YANG Tree














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



3.5.  OTN Tunnel YANG Code


  <CODE BEGINS>file "ietf-otn-tunnel@2017-03-11.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-transport-types { prefix "tran-types"; }
    //import yang-ext { prefix ext; revision-date 2013-07-09; }

    organization



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        "IETF CCAMP Working Group";

    contact
        "WG Web: <http://tools.ietf.org/wg/ccamp/>
        WG List: <mailto:ccamp@ietf.org>

        Editor: Anurag Sharma
                <mailto:AnSharma@infinera.com>

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

        Editor: Xian Zhang
                <mailto:zhang.xian@huawei.com>

        Editor: Kun Xiang
                <mailto:xiangkun@huawei.com>";

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

    revision "2017-03-11" {
        description
            "Revision 0.3";
        reference "TBD";
    }

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

                leaf payload-treatment {
            type enumeration {
                enum switching;
                enum transport;
            }
            default switching;
            description
                "Treatment of the incoming payload. Payload can
                either be switched, or transported as is.";
        }

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



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        }

        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 tran-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 {



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                    base tran-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 tran-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)";



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            }
        }
    }

    /*
    Note: Comment has been given to authors of TE Tunnel model to add
    tunnel-types to the model in order to identify the technology
    type of the service.

    grouping otn-service-type {
        description
          "Identifies the OTN Service type.";
        container otn-service {
          presence "Indicates OTN Service.";
          description
            "Its presence identifies the OTN Service type.";
        }
      } // otn-service-type

    augment "/te:te/te:tunnels/te:tunnel/te:tunnel-types" {
        description
                "Introduce OTN service type for tunnel.";
        ext:augment-identifier otn-service-type-augment;
        uses otn-service-type;
    }
    */

    /*
    Note: Comment has been given to authors of TE Tunnel model to add
    list of endpoints under config to support P2MP tunnel.
    */
    augment "/te:te/te:tunnels/te:tunnel/te:config" {
        description
                "Augment with additional parameters required for OTN
                service.";
        //ext:augment-identifier otn-tunnel-endpoint-config-augment;
        uses otn-tunnel-endpoint;
    }

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

    /*



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    Note: Comment has been given to authors of TE Tunnel model to add
    tunnel-lifecycle-event to the model. This notification is reported
    for all lifecycle changes (create, delete, and update) to the
    tunnel or lsp.
    augment "/te:tunnel-lifecycle-event" {
        description
          "OTN service event";
        uses otn-service-type;
        uses otn-tunnel-params;

        list endpoint {
          key
            "endpoint-address tp-id";
          description
            "List of Tunnel Endpoints.";
          uses te:tunnel-endpoint;
          uses otn-tunnel-params;
        }
      }
    */
}

<CODE ENDS>



3.6.  Transport Types YANG Code


   <CODE BEGINS> file "ietf-transport-types@2016-10-25.yang"

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

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

         Editor: Anurag Sharma
                 <mailto:AnSharma@infinera.com>

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

         Editor: Xian Zhang



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                 <mailto:zhang.xian@huawei.com>";

     description
         "This module defines transport types.";

     revision "2016-10-25" {
         description
             "Revision 0.2";
         reference "TBD";
     }

     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 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)";



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     }

     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)";
     }
     */




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     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).";



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     }

     /*
     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.";



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     }

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

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



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       }

     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";



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       }

     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;



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         description
                 "Client signal type of ODU Flex CBR";
     }

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

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

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

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

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

     identity client-signal-FICON-8G {
         base client-signal;
         description
                 "Client signal type of Fibre Connection 8G.";
     }
 }
  <CODE ENDS>










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Internet-Draft            OTN Tunnel YANG Model               March 2017


4.  Security Considerations

   TBD.

5.  IANA Considerations

   TBD.

6.  Acknowledgements

   TBD.

7.  Normative References

   [G.709]    "Interfaces for the Optical Transport Network(OTN)",
              G.709/Y.1331 Recommendation , June 2016.

   [RFC2119]  Bradner, S., "Key words for use in RFCs to Indicate
              Requirement Levels", BCP 14, RFC 2119,
              DOI 10.17487/RFC2119, March 1997,
              <http://www.rfc-editor.org/info/rfc2119>.

   [RFC6020]  Bjorklund, M., Ed., "YANG - A Data Modeling Language for
              the Network Configuration Protocol (NETCONF)", RFC 6020,
              DOI 10.17487/RFC6020, October 2010,
              <http://www.rfc-editor.org/info/rfc6020>.

   [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,
              <http://www.rfc-editor.org/info/rfc7139>.

Authors' Addresses

   Xian Zhang
   Huawei Technologies
   F3-5-B R&D Center, Huawei Industrial Base, Bantian, Longgang District
   Shenzhen, Guangdong  518129
   P.R.China

   Email: zhang.xian@huawei.com









Zhang, et al.          Expires September 12, 2017              [Page 19]


Internet-Draft            OTN Tunnel YANG Model               March 2017


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

   Email: xiangkun@huawei.com


   Anurag Sharma
   Infinera

   Email: ansharma@infinera.com


   Rajan Rao
   Infinera
   169 Java Drive
   Sunnyvale, CA  94089
   USA

   Email: rrao@infinera.com





























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