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Versions: (draft-dharini-ccamp-dwdm-if-yang) 00 01 02 03 04

Internet Engineering Task Force                       G. Galimberti, Ed.
Internet-Draft                                                     Cisco
Intended status: Experimental                                   R. Kunze
Expires: September 2, 2018                              Deutsche Telekom
                                                     D. Hiremagalur, Ed.
                                                         G. Grammel, Ed.
                                                                 Juniper
                                                           March 1, 2018


A YANG model to manage the optical interface parameters for an external
                      transponder in a WDM network
               draft-dharini-ccamp-dwdm-if-param-yang-04

Abstract

   This memo defines a Yang model related to the Optical Transceiver
   parameters characterising coherent 100G and above interfaces.  100G
   and above Transceivers support coherent modulation, multiple
   modulation formats, multiple FEC codes including some not yet
   specified (or by in phase of specification by) ITU-T G.698.2
   [ITU.G698.2] or any other ITU-T recommendation.  More context about
   the state of the Coherent transceivers is described in draft-many-
   coherent-DWDM-if-control.  Use cases are described in RFC7698

   The Yang model defined in this memo can be used for Optical
   Parameters monitoring and/or configuration of the endpoints of a
   multi-vendor IaDI optical link.

Copyright Notice

   Copyright (c) 2014 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Status of This Memo

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

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

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



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   This Internet-Draft will expire on September 2, 2018.

Copyright Notice

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

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

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  The Internet-Standard Management Framework  . . . . . . . . .   3
   3.  Conventions . . . . . . . . . . . . . . . . . . . . . . . . .   3
   4.  Overview  . . . . . . . . . . . . . . . . . . . . . . . . . .   4
     4.1.  Optical Parameters Description  . . . . . . . . . . . . .   4
       4.1.1.  Parameters at Ss  . . . . . . . . . . . . . . . . . .   5
       4.1.2.  Interface at point Rs . . . . . . . . . . . . . . . .   5
     4.2.  Use Cases . . . . . . . . . . . . . . . . . . . . . . . .   5
     4.3.  Optical Interface for external transponder in a WDM
           network . . . . . . . . . . . . . . . . . . . . . . . . .   5
   5.  Structure of the Yang Module  . . . . . . . . . . . . . . . .   8
   6.  Yang Module . . . . . . . . . . . . . . . . . . . . . . . . .   8
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .  21
   8.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  21
   9.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  21
   10. Contributors  . . . . . . . . . . . . . . . . . . . . . . . .  21
   11. References  . . . . . . . . . . . . . . . . . . . . . . . . .  23
     11.1.  Normative References . . . . . . . . . . . . . . . . . .  23
     11.2.  Informative References . . . . . . . . . . . . . . . . .  25
   Appendix A.  Change Log . . . . . . . . . . . . . . . . . . . . .  25
   Appendix B.  Open Issues  . . . . . . . . . . . . . . . . . . . .  25
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  26

1.  Introduction

   This memo defines a Yang model that translates and obsolete the SNMP
   mib module defined in draft-galikunze-ccamp-dwdm-if-snmp-mib for
   managing single channel optical interface parameters of DWDM
   applications, using the approach specified in G.698.2.  This model



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   supports parameters to characterize coherent transceivers found in
   current implementations to specify the mode of operation.  As
   application identifiers like those specified in ITU-T G.874.1
   [ITU.G874.1] are not avaiable we use mode templates instead.  A mode
   template describes transceiver characteristics in detail and can be
   identified by a mode-id.

   This draft refers and supports the RFC7698 and draft-many-coherent-
   DWDM-if-control.

   The YANG model describing and extending the optical parameters allows
   different vendors and operators to retrieve, provision and exchange
   information across the multi-vendor IaDI interfaces in an abstract
   manner.

   The they concept introduced by this YANG model is the notion of a
   mode.  A mode is a combination of parameters or parameter ranges that
   is supported by a transceiver.  As an example, operating a device in
   QPSK mode may use a different FEC and requires less OSNR to reach the
   FEC limit than the same transceiver operating in QAM16 mode.  Given
   the number of parameters and their possible combinations it is
   important for vendors to be able to qualify a set of combinations
   which is the basis to define a mode.  The YANG model furthermore
   provides means to selecting one mode as current-mode from that pre-
   defined list of modes supported by the transceiver module.  Once
   selected, current-opt-if-och-mode-params provide the means to
   configure specific parameters at run time and retrieve actual
   parameters from the module.  For example, the frequency is a
   parameter that can be set within min/max boundaries set by the
   current mode.  Laser Temperature however is a ro parameter available
   at run-time that can be checked against the mode boundaries and may
   trigger an event.

2.  The Internet-Standard Management Framework

   For a detailed overview of the documents that describe the current
   Internet-Standard Management Framework, please refer to section 7 of
   RFC 3410 [RFC3410].

   This memo specifies a Yang model for optical interfaces.

3.  Conventions

   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 RFC 2119 [RFC2119] In
   the description of OIDs the convention: Set (S) Get (G) and Trap (T)
   conventions will describe the action allowed by the parameter.



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4.  Overview

   Figure 1 shows a set of reference points, for single-channel
   connection between transmitters (Tx) and receivers (Rx).  Here the
   DWDM network elements include an OM and an OD (which are used as a
   pair with the opposing element), one or more optical amplifiers and
   may also include one or more OADMs.


          +-------------------------------------------------+
       Ss |              DWDM Network Elements              | Rs
   +--+ | |  | \                                       / |  |  | +--+
   Tx L1--|->|   \    +------+            +------+   /   |--|-->Rx L1
   +---+  |  |    |   |      |  +------+  |      |  |    |  |    +--+
   +---+  |  |    |   |      |  |      |  |      |  |    |  |    +--+
   Tx L2--|->| OM |-->|------|->|ROADM |--|------|->| OD |--|-->Rx L2
   +---+  |  |    |   |      |  |      |  |      |  |    |  |    +--+
   +---+  |  |    |   |      |  +------+  |      |  |    |  |    +--+
   Tx L3--|->|   /    | DWDM |    |  ^    | DWDM |   \   |--|-->Rx L3
   +---+  |  | /      | Link +----|--|----+ Link |     \ |  |    +--+
          +-----------+           |  |           +----------+
                               +--+  +--+
                               |        |
                            Rs v        | Ss
                            +-----+  +-----+
                            |RxLx |  |TxLx |
                            +-----+  +-----+
   Ss = reference point at the DWDM network element tributary output
   Rs = reference point at the DWDM network element tributary input
   Lx = Lambda x
   OM = Optical Mux
   OD = Optical Demux
   ROADM = Reconfigurable Optical Add Drop Mux


   from Fig. 5.1/G.698.2

               Figure 1: External transponder in WDM netwoks

4.1.  Optical Parameters Description

   The link between the external transponders through a WDM network
   media channels are managed at the edges, i.e. at the transmitters
   (Tx) and receivers (Rx) attached to the S and R reference points
   respectively.

   Definitions of the optical parameters are provided below to increase
   the readability of the document.



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4.1.1.  Parameters at Ss

   output-power:
      The mean launched power at Ss is the average power (in dBm) of a
      pseudo-random data sequence coupled into the DWDM link.

   central frequency:
      This parameter indicates the Central frequency value that Ss and
      Rs will be set to work (in THz)

4.1.2.  Interface at point Rs

   input-power:
      The average received power (in dBm) at point Rs.

   Curr-OSNR:
      Current Optical Signal to Noise Ratio (OSNR) estimated at Rx
      Transceiver port.

   Curr-q-factor:
      "Q" factor estimated at Rx Transceiver port.

4.2.  Use Cases

   The use cases are described in draft-ietf-ccamp-dwdm-if-mng-ctrl-fwk

4.3.  Optical Interface for external transponder in a WDM network

   The ietf-ext-xponder-wdm-if is an augment to the ietf-interface.  It
   allows the user to set the operating mode of transceivers as well as
   other operational parameters.  The module provides also treshold
   settings and notifications to supervise measured parameters and
   notify the client.

   module: ietf-ext-xponder-wdm-if
    augment /if:interfaces/if:interface:
       +--rw optIfOChRsSs
          +--rw if-current-mode
          |  +--ro mode-id?                      string
          |  +--ro min-central-frequency?        uint32
          |  +--ro max-central-frequency?        uint32
          |  +--ro min-input-power?              dbm-t
          |  +--ro max-input-power?              dbm-t
          |  +--ro min-output-power?             dbm-t
          |  +--ro max-output-power?             dbm-t
          |  +--ro osnr-margin?                  int32
          |  +--ro q-margin?                     int32
          |  +--ro fec-info?                     string



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          |  +--ro fec-bitrate?                  string
          |  +--ro fec-gain?                     string
          |  +--rw fec-ber-mantissa-threshold?   uint32
          |  +--rw fec-ber-exponent-threshold?   int32
          |  +--ro number-of-lanes?              uint32
          |  +--ro min-laser-temperature?        int32
          |  +--ro max-laser-temperature?        int32
          |  +--ro min-rx-optical-power?         dbm-t
          |  +--ro max-rx-optical-power?         dbm-t
          |  +--ro min-chromatic-dispersion?     int32
          |  +--ro max-chromatic-dispersion?     int32
          |  +--ro min-diff-group-delay?         int32
          |  +--ro max-diff-group-delay?         int32
          |  +--ro modulation-format?            string
          |  +--rw bits-per-symbol?              uint32
          |  +--rw num-symbols-in-alphabet?      uint32
          |  +--rw symbols-index?                uint32
          |  +--ro i-center?                     int32
          |  +--ro q-center?                     int32
          |  +--ro i-noise-variance?             int32
          |  +--ro q-noise-variance?             int32
          |  +--ro a-noise-variance?             int32
          |  +--ro p-noise-variance?             int32
          +--ro if-supported-mode
          |  +--ro number-of-modes-supported?   uint32
          |  +--ro mode-list* [mode-id]
          |     +--ro mode-id                       string
          |     +--ro min-central-frequency?        uint32
          |     +--ro max-central-frequency?        uint32
          |     +--ro min-input-power?              dbm-t
          |     +--ro max-input-power?              dbm-t
          |     +--ro min-output-power?             dbm-t
          |     +--ro max-output-power?             dbm-t
          |     +--ro osnr-margin?                  int32
          |     +--ro q-margin?                     int32
          |     +--ro fec-info?                     string
          |     +--ro fec-bitrate?                  string
          |     +--ro fec-gain?                     string
          |     +--ro fec-ber-mantissa-threshold?   uint32
          |     +--ro fec-ber-exponent-threshold?   int32
          |     +--ro number-of-lanes?              uint32
          |     +--ro min-laser-temperature?        int32
          |     +--ro max-laser-temperature?        int32
          |     +--ro min-rx-optical-power?         dbm-t
          |     +--ro max-rx-optical-power?         dbm-t
          |     +--ro min-chromatic-dispersion?     int32
          |     +--ro max-chromatic-dispersion?     int32
          |     +--ro min-diff-group-delay?         int32



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          |     +--ro max-diff-group-delay?         int32
          |     +--ro modulation-format?            string
          |     +--ro bits-per-symbol?              uint32
          |     +--ro num-symbols-in-alphabet?      uint32
          |     +--ro symbols-index?                uint32
          |     +--ro i-center?                     int32
          |     +--ro q-center?                     int32
          |     +--ro i-noise-variance?             int32
          |     +--ro q-noise-variance?             int32
          |     +--ro a-noise-variance?             int32
          |     +--ro p-noise-variance?             int32
          +--rw current-opt-if-och-mode-params
             +--rw mode-id?                          string
             +--ro osnr-margin?                      int32
             +--ro q-margin?                         int32
             +--rw central-frequency?                uint32
             +--rw output-power?                     int32
             +--ro input-power?                      int32
             +--rw min-fec-ber-mantissa-threshold?   uint32
             +--rw min-fec-ber-exponent-threshold?   int32
             +--rw max-fec-ber-mantissa-threshold?   uint32
             +--rw max-fec-ber-exponent-threshold?   int32
             +--rw number-of-tcas-supported?         uint32
             +--rw mode-list* [tca-type]
             |  +--rw tca-type        opt-if-och-tca-types
             |  +--rw min-threshold?                 int32
             |  +--rw max-threshold?                 int32
             +--ro cur-osnr?                         int32
             +--ro cur-q-factor?                     int32
             +--ro uncorrected-words?                uint64
             +--ro fec-ber-mantissa?                 uint32
             +--ro fec-ber-exponent?                 int32

     notifications:
       +---n opt-if-och-central-frequency-change
       |  +--ro if-name?   -> /if:interfaces/interface/name
       |  +--ro new-opt-if-och-central-frequency
       |     +--ro central-frequency?               uint32
       +---n opt-if-och-mode-change
       |  +--ro if-name?   -> /if:interfaces/interface/name
       |  +--ro mode-id?                             string
       +---n opt-if-och-min-tca
          +--ro if-name?   -> /if:interfaces/interface/name
          +--ro tca-type?   opt-if-och-tca-types







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5.  Structure of the Yang Module

   ietf-ext-xponder-wdm-if is a top level model for the support of this
   feature.

6.  Yang Module

   The ietf-ext-xponder-wdm-if is defined as an extension to ietf
   interfaces.


   <CODE BEGINS> file "ietf-ext-xponder-wdm-if.yang"

   module ietf-ext-xponder-wdm-if {
       namespace "urn:ietf:params:xml:ns:yang:ietf-ext-xponder-wdm-if";
       prefix ietf-ext-xponder-wdm-if;

       import ietf-interfaces {
         prefix if;
        }

        organization
          "IETF CCAMP
          Working Group";

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


           Editor:   Dharini Hiremagalur
                     <mailto:dharinih@juniper.net>";

        description
          "This module contains a collection of YANG definitions for
           configuring Optical interfaces.

           Copyright (c) 2016 IETF Trust and the persons identified
           as authors of the code.  All rights reserved.

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





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       revision "2018-03-06" {
              description
                  "Revision 1.1";
              reference
                  "";
       }

       revision "2017-03-06" {
              description
                  "Revision 1.0";
              reference
                  "";
       }
       revision "2016-03-17" {
              description
                  "Initial revision.";
              reference
                  "";
       }



        typedef dbm-t {
          type decimal64 {
            fraction-digits 2;
            range "-50..-30 | -10..5 | 10000000";
          }
          description "
            Amplifier Power in dBm ";
        }
        typedef opt-if-och-tca-types {

            type enumeration {
                enum max-laser-linewdt {
                  description " The maximum laser linewidth";
                }
                enum min-tx-power-tca {
                  description " The min tx power tca";
                }
                enum max-tx-power-tca {
                  description " The min tx power tca";
                }
                enum min-rx-power-tca{
                  description " The min tx power tca";
                }
                enum max-rx-power-tca{
                  description " The min tx power tca";
                }



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                enum max-pol-power-diff-tca{
                  description " The power diff. between polariz. tca";
                }
                enum max-pol-skew-diff-tca{
                  description " The Skew between the two polariz. tca";
                }
                enum min-frequency-offset-tca{
                  description " Min Frequency offset tca";
                }
                enum max-frequency-offset-tca{
                  description " Max Frequency offset tca";
                }
                enum min-osnr-tca{
                  description " Min OSNR tca";
                }
                enum max-osnr-tca{
                  description " Max OSNR tca";
                }
                enum min-laser-temperature-tca{
                  description " The min tx power tca";
                }
                enum max-laser-temperature-tca{
                  description " Temperature tca";
                }
                enum min-fec-ber-tca{
                  description " Min Pre Fec BER tca";
                }
                enum max-fec-ber-tca{
                  description " Max Pre Fec BER tca";
                }
                enum min-q-tca{
                  description "Min Q tca";
                }
                enum max-q-tca {
                  description "Max Q tca";
                }
            }
            description " The different types of TCA's";
        }


        grouping opt-if-och-power {
           description "Interface optical Power";
           leaf output-power {
               type int32;
               units ".01dbm";
               description "The output power for this interface
                             in .01 dBm.



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                             The setting of the output power is
                              optional";
           }

           leaf input-power {
                type int32;
                units ".01dbm";
                config false;
                description "The current input power of this
                      interface";
           }
       }

        grouping opt-if-och-tca-thresholds {
             description "Thresholds for TCA's";
             leaf  tca-type {
                type opt-if-och-tca-types;
                description  "type of the TCA eg TX Power";
             }
             leaf  min-threshold {
               type int32;
               description " A TCA is generated if the variable is
                             less than this value";

              }
              leaf  max-threshold {
               type int32;
               description " A TCA is generated if the variable is
                             more than this value";
              }
         }

         grouping opt-if-och-fec {
             description "Fec info";
             leaf fec-info {
                type string {
                   length "1..255";
                }
                config false;
                description
                         "Fec Type - eg GFEC";
            }
            leaf fec-bitrate {
                type string {
                    length "1..255";
                }
                config false;
                description



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                         "Fec Overhead rate ";
            }
            leaf fec-gain {
               type string {
                   length "1..255";
               }
               config false;
               description
                         "Fec Overhead rate ";
             }
             leaf  fec-ber-mantissa-threshold {
               type uint32;
               description " Mantissa of the FEC BER threshold";

              }
              leaf  fec-ber-exponent-threshold {
                type int32;
                description " Exponent of the FEC BER threshold";
              }
         }

         grouping opt-if-och-central-frequency {
             description "Interface Central Frequency";
             leaf  central-frequency {
               type uint32;
               description " This parameter indicates the frequency
                             of this interface ";
              }
         }

         grouping opt-if-och-constellation {
             description "Optical constellation parameters";
             leaf i-center {
                type int32;
                units ".0001";
                config false;
                description "The In-phase coordinate of the selected
                             constellation symbol for this mode";
              }
              leaf q-center {
                type int32;
                units ".0001";
                config false;
                description "The Quadrature coordinate of the selected
                             constellation symbol for this mode";
              }
              leaf i-noise-variance {
                type int32;



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                units ".001";
                config false;
                description "The Variance of the in-phase noise
                             component for this mode";
              }
              leaf q-noise-variance {
                type int32;
                units ".001";
                config false;
                description "The Variance of the quadrature noise
                             component for this mode";
              }
              leaf a-noise-variance {
                type int32;
                units ".001";
                config false;
                description "The Variance of the radial noise
                             component for this mode";
              }
              leaf p-noise-variance {
                type int32;
                units ".001";
                config false;
                description "The Variance of the phase noise
                             component for this mode";
              }
         }

         grouping opt-if-och-modulation-params {
             description "Optical modulation parameters for the lane";
             leaf modulation-format {
                type string {
                   length "1..255";
                }
                config false;
                description
                         "Modulation format for this mode";
             }
             leaf  bits-per-symbol {
               type uint32;
               description " This parameter the bits per symbol for
                             this mode.";

             }
             leaf  num-symbols-in-alphabet {
               type uint32;
               description " This parameter the bits per symbol for
                             this mode.";



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              }
              leaf  symbols-index {
               type uint32;
               description " This parameter is the symbol index this
                             mode.";

              }
              uses opt-if-och-constellation;

         }

         grouping opt-if-och-lane-param {
             description "Optical parameters for the lane";
             leaf number-of-lanes {
                type  uint32;
                config false;
                description
                       "Number of optical lanes of this interface";
             }
             leaf min-laser-temperature {
                type  int32;
                units ".01C";
                config false;
                description
                       "Minimum Laser Temperature of this mode for
                          this interface";
            }
            leaf max-laser-temperature {
                type  int32;
                units ".01C";
                config false;
                description
                       "Maximum Laser Temperature of this mode for
                          this interface";
            }
            leaf min-rx-optical-power {
                type dbm-t;
                config false;
                description
                        "Minimum rx optical power of this mode for
                          this interface";
            }
            leaf max-rx-optical-power {
                type dbm-t;
                config false;
                description
                        "Maximum rx optical power of this mode for
                          this interface";



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            }
            leaf min-chromatic-dispersion {
                type int32;
                config false;
                description
                        "Minimum chromatic dispersion of this mode
                          for this interface";
            }
            leaf max-chromatic-dispersion {
                type int32;
                config false;
                description
                         "Maximum chromatic dispersion of this
                           mode for this interface";
            }
            leaf min-diff-group-delay {
                type int32;
                config false;
                description
                         "Minimum Differential group delay of this
                           mode for this interface";
            }
            leaf max-diff-group-delay  {
                type int32;
                config false;
                description
                         "Maximum Differential group delay of this
                           mode for this interface";
            }
             uses opt-if-och-modulation-params;
         }



         grouping opt-if-och-tca-list {
           description "List of TCA's.";
           leaf number-of-tcas-supported {
               type uint32;
               description "Number of tcas
                            supported by this interface";
            }
           list mode-list {
               key "tca-type";
               description "List of the tcas";
               uses opt-if-och-tca-thresholds;
           }
         }




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         grouping opt-if-och-fec-tca-thresholds {
             description "Pre FEC BER Thresholds for TCA's";
             leaf  min-fec-ber-mantissa-threshold {
               type uint32;
               description " Min Mantissa of the FEC BER threshold";

              }
              leaf  min-fec-ber-exponent-threshold {
               type int32;
               description " Min Exponent of the FEC BER threshold";

              }
              leaf  max-fec-ber-mantissa-threshold {
               type uint32;
               description " Max Mantissa of the FEC BER threshold";

              }
              leaf  max-fec-ber-exponent-threshold {
               type int32;
               description " Max Exponent of the FEC BER threshold";

              }
         }


         grouping opt-if-och-mode-params  {
             description "OCh mode parameters.";
             leaf mode-id {
                   type string {
                         length "1..255";
                   }
                   description
                         "Id for the OCh mode template";
             }
             leaf  osnr-margin {
               type int32;
               units "dB";
               config false;
               description " OSNR margin to FEC threshold";
              }
              leaf  q-margin {
               type int32;
               units "dB";
               config false;
               description " Q-Factor margin to FEC threshold";
              }
             uses opt-if-och-central-frequency;
             uses opt-if-och-power;



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             uses opt-if-och-fec-tca-thresholds;
             uses opt-if-och-tca-list;

         }

         grouping opt-if-och-statistics {
             description "OCh statistics.";
             leaf  cur-osnr {
               type int32;
               units "dB";
               config false;
               description " OSNR margin to FEC threshold";
              }
              leaf  cur-q-factor {
               type int32;
               units "dB";
               config false;
               description " Q-Factor of the interface";
              }
              leaf  uncorrected-words {
               type uint64;
               config false;
               description " Post FEC errored words";
              }
              leaf  fec-ber-mantissa {
               type uint32;
               config false;
               description " Pre fec FEC errored words mantissa";
              }
              leaf  fec-ber-exponent {
               type int32;
               config false;
               description " Pre fec FEC errored words exponent";
              }
         }

         grouping opt-if-och-mode  {
                 description "OCh mode template.";
                 leaf mode-id {
                   type string {
                         length "1..255";
                   }
                   config false;
                   description
                         "Id for the OCh mode template";
                  }
                  leaf min-central-frequency {
                      type uint32;



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                      config false;
                      description "This parameter indicates the minimum
                                    frequency for this template  ";
                   }
                   leaf max-central-frequency {
                      type uint32;
                      config false;
                      description "This parameter indicates the minimum
                                    frequency for this template  ";
                   }
                   leaf min-input-power {
                      type dbm-t;
                      config false;
                      description "The minimum input power of this
                                   interface";
                   }
                   leaf max-input-power {
                      type dbm-t;
                      config false;
                      description "The maximum input power of this
                                   interface";
                   }
                   leaf min-output-power {
                      type dbm-t;
                      config false;
                      description "The minimum output power of this
                                   interface";
                   }
                   leaf max-output-power {
                      type dbm-t;
                      config false;
                      description "The maximum output power of this
                                   interface";
                   }
                   leaf  osnr-margin {
                      type int32;
                      units "dB";
                      config false;
                      description "OSNR margin to FEC threshold";
                   }
                   leaf  q-margin {
                      type int32;
                      units "dB";
                      config false;
                      description "Q-Factor margin to FEC threshold";
                   }
                   uses opt-if-och-fec;
                   uses opt-if-och-lane-param;



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         }




        grouping opt-if-och-mode-list {
           description "List of Mode list group.";
           leaf number-of-modes-supported {
               type uint32;
               description "Number of modes
                            supported by this interface";
            }
           list mode-list {
               key "mode-id";
               description "List of the modes ";
               uses opt-if-och-mode;
           }
         }


         notification opt-if-och-central-frequency-change {
            description "A change of Central Frequency has been
                         detected.";
            leaf "if-name" {
                type leafref {
                    path "/if:interfaces/if:interface/if:name";
                }
                description "Interface name";
            }
            container new-opt-if-och-central-frequency {
            description "The new Central Frequency of the
                         interface";
            uses opt-if-och-central-frequency;
            }
         }

         notification opt-if-och-mode-change {
            description "A change of Mode Template has been
                         detected.";
            leaf "if-name" {
                type leafref {
                    path "/if:interfaces/if:interface/if:name";
                }
                description "Interface name";
            }
            leaf mode-id {
                type string {
                    length "1..255";



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                }
                description  "Id for the OCh mode template";
            }

         }

         notification opt-if-och-min-tca {
            description "A min output TCA notification.";
            leaf "if-name" {
                type leafref {
                    path "/if:interfaces/if:interface/if:name";
                }
                description "Interface name";
            }
            leaf tca-type {
                type opt-if-och-tca-types;
                description "Type of TCA for eg min tx power TCA";
            }
         }

         augment "/if:interfaces/if:interface" {
           description "Parameters for an optical interface";
           container optIfOChRsSs {
              description "RsSs path configuration for an interface";
              container if-current-mode {
                   description "Current mode template of the
                                interface";
                   uses opt-if-och-mode;
               }

               container if-supported-mode {
                   config false;
                   description "Supported mode list of
                                this interface";
                   uses opt-if-och-mode-list;
               }
               container current-opt-if-och-mode-params {
                   description "Current parameters of
                                this interface";
                   uses opt-if-och-mode-params;
                   uses opt-if-och-statistics;
               }


            }
         }
      }




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   <CODE ENDS>


7.  Security Considerations

   The YANG module defined in this memo is designed to be accessed via
   the NETCONF protocol [RFC6241]. he lowest NETCONF layer is the secure
   transport layer and the mandatory-to-implement secure transport is
   SSH [RFC6242].  The NETCONF access control model [RFC6536] provides
   the means to restrict access for particular NETCONF users to a pre-
   configured subset of all available NETCONF protocol operation and
   content.

8.  IANA Considerations

   This document registers a URI in the IETF XML registry [RFC3688].
   Following the format in [RFC3688], the following registration is
   requested to be made:

   URI: urn:ietf:params:xml:ns:yang:ietf-interfaces:ietf-ext-xponder-
   wdm-if

   Registrant Contact: The IESG.

   XML: N/A, the requested URI is an XML namespace.

   This document registers a YANG module in the YANG Module Names
   registry [RFC6020].

   This document registers a YANG module in the YANG Module Names
   registry [RFC6020].

   prefix: ietf-ext-xponder-wdm-if reference: RFC XXXX

9.  Acknowledgements

10.  Contributors














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               Dean Bogdanovic
                 Westford
                 U.S.A.
                 email ivandean@gmail.com

               Bernd Zeuner
                 Deutsche Telekom
                 Darmstadt
                 Germany
                 email B.Zeuner@telekom.de

               Massimiliano Salsi
                 Juniper Networks
                 1133 Innovation Way
                 Sunnyvale, CA, 94089
                 U.S.A.
                 +1 408936847
                 email msalsi@juniper.net

               Arnold Mattheus
                 Deutsche Telekom
                 Darmstadt
                 Germany
                 email a.mattheus@telekom.de

               Manuel Paul
                 Deutsche Telekom
                 Berlin
                 Germany
                 email Manuel.Paul@telekom.de

               Walid Wakim
                 Cisco
                 9501 Technology Blvd
                 ROSEMONT, ILLINOIS 60018
                 UNITED STATES
                 email wwakim@cisco.com

               Kam Lam
                 Nokia
                 USA
                 +1 732 331 3476
                 kam.lam@nokia.com








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11.  References

11.1.  Normative References

   [ITU.G694.1]
              International Telecommunications Union, "Spectral grids
              for WDM applications: DWDM frequency grid",
              ITU-T Recommendation G.694.1, June 2002.

   [ITU.G698.2]
              International Telecommunications Union, "Amplified
              multichannel dense wavelength division multiplexing
              applications with single channel optical interfaces",
              ITU-T Recommendation G.698.2, November 2009.

   [ITU.G709]
              International Telecommunications Union, "Interface for the
              Optical Transport Network (OTN)", ITU-T Recommendation
              G.709, March 2003.

   [ITU.G7710]
              International Telecommunications Union, "Common equipment
              management function requirements", ITU-T Recommendation
              G.7710, May 2008.

   [ITU.G798]
              International Telecommunications Union, "Characteristics
              of optical transport network hierarchy equipment
              functional blocks", ITU-T Recommendation G.798, October
              2010.

   [ITU.G8201]
              International Telecommunications Union, "Error performance
              parameters and objectives for multi-operator international
              paths within the Optical Transport Network (OTN)",
              ITU-T Recommendation G.8201, April 2011.

   [ITU.G826]
              International Telecommunications Union, "End-to-end error
              performance parameters and objectives for international,
              constant bit-rate digital paths and connections",
              ITU-T Recommendation G.826, November 2009.

   [ITU.G872]
              International Telecommunications Union, "Architecture of
              optical transport networks", ITU-T Recommendation G.872,
              November 2001.




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   [ITU.G874]
              International Telecommunications Union, "Management
              aspects of optical transport network elements",
              ITU-T Recommendation G.874, July 2010.

   [ITU.G874.1]
              International Telecommunications Union, "Optical transport
              network (OTN): Protocol-neutral management information
              model for the network element view", ITU-T Recommendation
              G.874.1, January 2002.

   [ITU.G959.1]
              International Telecommunications Union, "Optical transport
              network physical layer interfaces", ITU-T Recommendation
              G.959.1, November 2009.

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

   [RFC2578]  McCloghrie, K., Ed., Perkins, D., Ed., and J.
              Schoenwaelder, Ed., "Structure of Management Information
              Version 2 (SMIv2)", STD 58, RFC 2578,
              DOI 10.17487/RFC2578, April 1999,
              <https://www.rfc-editor.org/info/rfc2578>.

   [RFC2579]  McCloghrie, K., Ed., Perkins, D., Ed., and J.
              Schoenwaelder, Ed., "Textual Conventions for SMIv2",
              STD 58, RFC 2579, DOI 10.17487/RFC2579, April 1999,
              <https://www.rfc-editor.org/info/rfc2579>.

   [RFC2580]  McCloghrie, K., Ed., Perkins, D., Ed., and J.
              Schoenwaelder, Ed., "Conformance Statements for SMIv2",
              STD 58, RFC 2580, DOI 10.17487/RFC2580, April 1999,
              <https://www.rfc-editor.org/info/rfc2580>.

   [RFC2863]  McCloghrie, K. and F. Kastenholz, "The Interfaces Group
              MIB", RFC 2863, DOI 10.17487/RFC2863, June 2000,
              <https://www.rfc-editor.org/info/rfc2863>.

   [RFC3591]  Lam, H-K., Stewart, M., and A. Huynh, "Definitions of
              Managed Objects for the Optical Interface Type", RFC 3591,
              DOI 10.17487/RFC3591, September 2003,
              <https://www.rfc-editor.org/info/rfc3591>.






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   [RFC6205]  Otani, T., Ed. and D. Li, Ed., "Generalized Labels for
              Lambda-Switch-Capable (LSC) Label Switching Routers",
              RFC 6205, DOI 10.17487/RFC6205, March 2011,
              <https://www.rfc-editor.org/info/rfc6205>.

11.2.  Informative References

   [I-D.ietf-ccamp-dwdm-if-mng-ctrl-fwk]
              Kunze, R., Grammel, G., Beller, D., and G. Galimberti, "A
              framework for Management and Control of DWDM optical
              interface parameters", draft-ietf-ccamp-dwdm-if-mng-ctrl-
              fwk-00 (work in progress), April 2016.

   [RFC2629]  Rose, M., "Writing I-Ds and RFCs using XML", RFC 2629,
              DOI 10.17487/RFC2629, June 1999,
              <https://www.rfc-editor.org/info/rfc2629>.

   [RFC3410]  Case, J., Mundy, R., Partain, D., and B. Stewart,
              "Introduction and Applicability Statements for Internet-
              Standard Management Framework", RFC 3410,
              DOI 10.17487/RFC3410, December 2002,
              <https://www.rfc-editor.org/info/rfc3410>.

   [RFC4054]  Strand, J., Ed. and A. Chiu, Ed., "Impairments and Other
              Constraints on Optical Layer Routing", RFC 4054,
              DOI 10.17487/RFC4054, May 2005,
              <https://www.rfc-editor.org/info/rfc4054>.

   [RFC4181]  Heard, C., Ed., "Guidelines for Authors and Reviewers of
              MIB Documents", BCP 111, RFC 4181, DOI 10.17487/RFC4181,
              September 2005, <https://www.rfc-editor.org/info/rfc4181>.

Appendix A.  Change Log

   This optional section should be removed before the internet draft is
   submitted to the IESG for publication as an RFC.

   Note to RFC Editor: please remove this appendix before publication as
   an RFC.

Appendix B.  Open Issues

   Note to RFC Editor: please remove this appendix before publication as
   an RFC.







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Authors' Addresses

   Gabriele Galimberti (editor)
   Cisco
   Via Santa Maria Molgora, 48 c
   20871 - Vimercate
   Italy

   Phone: +390392091462
   Email: ggalimbe@cisco.com


   Ruediger Kunze
   Deutsche Telekom
   Winterfeldtstr. 21-27
   10781 Berlin
   Germany

   Phone: +491702275321
   Email: RKunze@telekom.de


   Dharini Hiremagalur (editor)
   Juniper
   1133 Innovation Way
   Sunnyvale - 94089 California
   USA

   Email: dharinih@juniper.net


   Gert Grammel (editor)
   Juniper
   Oskar-Schlemmer Str. 15
   80807 Muenchen
   Germany

   Phone: +49 1725186386
   Email: ggrammel@juniper.net












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