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<!DOCTYPE html>
<html lang="en" class="RFC">
<head>
<meta charset="utf-8">
<meta content="Common,Han,Latin" name="scripts">
<meta content="initial-scale=1.0" name="viewport">
<title>RFC 9093: A YANG Data Model for Layer 0 Types</title>
<meta content="郑好棉 (Haomian Zheng)" name="author">
<meta content="Young Lee" name="author">
<meta content="Aihua Guo" name="author">
<meta content="Victor Lopez" name="author">
<meta content="Daniel King" name="author">
<meta content="
       
   This document defines a collection of common data types and groupings in the YANG data modeling language.  These derived common types and groupings are intended to be imported by modules that model Layer 0 optical Traffic Engineering (TE) configuration and state capabilities such as Wavelength Switched Optical Networks (WSONs) and flexi-grid Dense Wavelength Division Multiplexing (DWDM) networks. 
       
    " name="description">
<meta content="xml2rfc 3.9.1" name="generator">
<meta content="WDM" name="keyword">
<meta content="YANG data model" name="keyword">
<meta content="Types" name="keyword">
<meta content="9093" name="rfc.number">
<!-- Generator version information:
  xml2rfc 3.9.1
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-->
<link href="rfc9093.xml" rel="alternate" type="application/rfc+xml">
<link href="#copyright" rel="license">
<style type="text/css">/*

  NOTE: Changes at the bottom of this file overrides some earlier settings.

  Once the style has stabilized and has been adopted as an official RFC style,
  this can be consolidated so that style settings occur only in one place, but
  for now the contents of this file consists first of the initial CSS work as
  provided to the RFC Formatter (xml2rfc) work, followed by itemized and
  commented changes found necssary during the development of the v3
  formatters.

*/

/* fonts */
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@import url('https://fonts.googleapis.com/css?family=Noto+Serif'); /* Serif (print) */
@import url('https://fonts.googleapis.com/css?family=Roboto+Mono'); /* Monospace */

@viewport {
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@-ms-viewport {
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/* general and mobile first */
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}
body {
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/* headings */
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/* 
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*/
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/* links */
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a[href] {
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a[href]:hover {
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figcaption a[href],
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/* XXX probably not this:
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/* aside, blockquote */
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blockquote {
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cite {
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/* tables */
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/* references */
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.refInstance {
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.references .ascii {
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/* make the index two-column on all but the smallest screens */
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/* authors */
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address.vcard .nameRole {
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/* temporary notes */
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.crefSource {
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}
/* alternative layout for smaller screens */
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}

/* alternative layout for wide screens */
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    padding-right: 29em;
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    right: 42px;
    width: 25%;
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    overflow: auto;
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  img { /* future proofing */
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}

/* pagination */
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}

/* This is commented out here, as the string-set: doesn't
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/*
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*/

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@page {
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}

/* Changes introduced to fix issues found during implementation */
/* Make sure links are clickable even if overlapped by following H* */
a {
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}
/* Separate body from document info even without intervening H1 */
section {
  clear: both;
}


/* Top align author divs, to avoid names without organization dropping level with org names */
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/* Leave room in document info to show Internet-Draft on one line */
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/* Don't waste quite as much whitespace between label and value in doc info */
#identifiers dd {
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/* Give floating toc a background color (needed when it's a div inside section */
#toc {
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}

/* Make the collapsed ToC header render white on gray also when it's a link */
@media screen and (max-width: 1023px) {
  #toc h2 a,
  #toc h2 a:link,
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  #toc h2 a:hover,
  #toc a.toplink,
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    background-color: #444;
    text-decoration: none;
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}

/* Give the bottom of the ToC some whitespace */
@media screen and (min-width: 1024px) {
  #toc {
    padding: 0 0 1em 1em;
  }
}

/* Style section numbers with more space between number and title */
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}

/* prevent monospace from becoming overly large */
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}

/* Fix the height/width aspect for ascii art*/
pre.sourcecode,
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}


/* Add styling for a link in the ToC that points to the top of the document */
a.toplink {
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  margin-right: 0.5em;
}

/* Fix the dl styling to match the RFC 7992 attributes */
dl > dt,
dl.dlParallel > dt {
  float: left;
  margin-right: 1em;
}
dl.dlNewline > dt {
  float: none;
}

/* Provide styling for table cell text alignment */
table td.text-left,
table th.text-left {
  text-align: left;
}
table td.text-center,
table th.text-center {
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}
table td.text-right,
table th.text-right {
  text-align: right;
}

/* Make the alternative author contact informatio look less like just another
   author, and group it closer with the primary author contact information */
.alternative-contact {
  margin: 0.5em 0 0.25em 0;
}
address .non-ascii {
  margin: 0 0 0 2em;
}

/* With it being possible to set tables with alignment
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table {
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}

/* Avoid reference text that sits in a block with very wide left margin,
   because of a long floating dt label.*/
.references dd {
  overflow: visible;
}

/* Control caption placement */
caption {
  caption-side: bottom;
}

/* Limit the width of the author address vcard, so names in right-to-left
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address.vcard {
  max-width: 30em;
  margin-right: auto;
}

/* For address alignment dependent on LTR or RTL scripts */
address div.left {
  text-align: left;
}
address div.right {
  text-align: right;
}

/* Provide table alignment support.  We can't use the alignX classes above
   since they do unwanted things with caption and other styling. */
table.right {
 margin-left: auto;
 margin-right: 0;
}
table.center {
 margin-left: auto;
 margin-right: auto;
}
table.left {
 margin-left: 0;
 margin-right: auto;
}

/* Give the table caption label the same styling as the figcaption */
caption a[href] {
  color: #222;
}

@media print {
  .toplink {
    display: none;
  }

  /* avoid overwriting the top border line with the ToC header */
  #toc {
    padding-top: 1px;
  }

  /* Avoid page breaks inside dl and author address entries */
  .vcard {
    page-break-inside: avoid;
  }

}
/* Tweak the bcp14 keyword presentation */
.bcp14 {
  font-variant: small-caps;
  font-weight: bold;
  font-size: 0.9em;
}
/* Tweak the invisible space above H* in order not to overlay links in text above */
 h2 {
  margin-top: -18px;  /* provide offset for in-page anchors */
  padding-top: 31px;
 }
 h3 {
  margin-top: -18px;  /* provide offset for in-page anchors */
  padding-top: 24px;
 }
 h4 {
  margin-top: -18px;  /* provide offset for in-page anchors */
  padding-top: 24px;
 }
/* Float artwork pilcrow to the right */
@media screen {
  .artwork a.pilcrow {
    display: block;
    line-height: 0.7;
    margin-top: 0.15em;
  }
}
/* Make pilcrows on dd visible */
@media screen {
  dd:hover > a.pilcrow {
    visibility: visible;
  }
}
/* Make the placement of figcaption match that of a table's caption
   by removing the figure's added bottom margin */
.alignLeft.art-text,
.alignCenter.art-text,
.alignRight.art-text {
   margin-bottom: 0;
}
.alignLeft,
.alignCenter,
.alignRight {
  margin: 1em 0 0 0;
}
/* In print, the pilcrow won't show on hover, so prevent it from taking up space,
   possibly even requiring a new line */
@media print {
  a.pilcrow {
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<table class="ears">
<thead><tr>
<td class="left">RFC 9093</td>
<td class="center">A YANG Data Model for Layer 0 Types</td>
<td class="right">August 2021</td>
</tr></thead>
<tfoot><tr>
<td class="left">Zheng, et al.</td>
<td class="center">Standards Track</td>
<td class="right">[Page]</td>
</tr></tfoot>
</table>
<div id="external-metadata" class="document-information"></div>
<div id="internal-metadata" class="document-information">
<dl id="identifiers">
<dt class="label-stream">Stream:</dt>
<dd class="stream">Internet Engineering Task Force (IETF)</dd>
<dt class="label-rfc">RFC:</dt>
<dd class="rfc"><a href="https://www.rfc-editor.org/rfc/rfc9093" class="eref">9093</a></dd>
<dt class="label-category">Category:</dt>
<dd class="category">Standards Track</dd>
<dt class="label-published">Published:</dt>
<dd class="published">
<time datetime="2021-08" class="published">August 2021</time>
    </dd>
<dt class="label-issn">ISSN:</dt>
<dd class="issn">2070-1721</dd>
<dt class="label-authors">Authors:</dt>
<dd class="authors">
<div class="author">
      <div class="author-name">
<span class="non-ascii">郑好棉</span> (<span class="ascii">H. Zheng</span>)</div>
<div class="org">
<span class="non-ascii">华为技术有限公司</span> (<span class="ascii">Huawei Technologies</span>)</div>
</div>
<div class="author">
      <div class="author-name">Y. Lee</div>
<div class="org">Samsung</div>
</div>
<div class="author">
      <div class="author-name">A. Guo</div>
<div class="org">Futurewei</div>
</div>
<div class="author">
      <div class="author-name">V. Lopez</div>
<div class="org">Nokia</div>
</div>
<div class="author">
      <div class="author-name">D. King</div>
<div class="org">University of Lancaster</div>
</div>
</dd>
</dl>
</div>
<h1 id="rfcnum">RFC 9093</h1>
<h1 id="title">A YANG Data Model for Layer 0 Types</h1>
<section id="section-abstract">
      <h2 id="abstract"><a href="#abstract" class="selfRef">Abstract</a></h2>
<p id="section-abstract-1">
   This document defines a collection of common data types and groupings in the YANG data modeling language.  These derived common types and groupings are intended to be imported by modules that model Layer 0 optical Traffic Engineering (TE) configuration and state capabilities such as Wavelength Switched Optical Networks (WSONs) and flexi-grid Dense Wavelength Division Multiplexing (DWDM) networks.<a href="#section-abstract-1" class="pilcrow">¶</a></p>
</section>
<div id="status-of-memo">
<section id="section-boilerplate.1">
        <h2 id="name-status-of-this-memo">
<a href="#name-status-of-this-memo" class="section-name selfRef">Status of This Memo</a>
        </h2>
<p id="section-boilerplate.1-1">
            This is an Internet Standards Track document.<a href="#section-boilerplate.1-1" class="pilcrow">¶</a></p>
<p id="section-boilerplate.1-2">
            This document is a product of the Internet Engineering Task Force
            (IETF).  It represents the consensus of the IETF community.  It has
            received public review and has been approved for publication by
            the Internet Engineering Steering Group (IESG).  Further
            information on Internet Standards is available in Section 2 of 
            RFC 7841.<a href="#section-boilerplate.1-2" class="pilcrow">¶</a></p>
<p id="section-boilerplate.1-3">
            Information about the current status of this document, any
            errata, and how to provide feedback on it may be obtained at
            <span><a href="https://www.rfc-editor.org/info/rfc9093">https://www.rfc-editor.org/info/rfc9093</a></span>.<a href="#section-boilerplate.1-3" class="pilcrow">¶</a></p>
</section>
</div>
<div id="copyright">
<section id="section-boilerplate.2">
        <h2 id="name-copyright-notice">
<a href="#name-copyright-notice" class="section-name selfRef">Copyright Notice</a>
        </h2>
<p id="section-boilerplate.2-1">
            Copyright (c) 2021 IETF Trust and the persons identified as the
            document authors. All rights reserved.<a href="#section-boilerplate.2-1" class="pilcrow">¶</a></p>
<p id="section-boilerplate.2-2">
            This document is subject to BCP 78 and the IETF Trust's Legal
            Provisions Relating to IETF Documents
            (<span><a href="https://trustee.ietf.org/license-info">https://trustee.ietf.org/license-info</a></span>) 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.<a href="#section-boilerplate.2-2" class="pilcrow">¶</a></p>
</section>
</div>
<div id="toc">
<section id="section-toc.1">
        <a href="#" onclick="scroll(0,0)" class="toplink">▲</a><h2 id="name-table-of-contents">
<a href="#name-table-of-contents" class="section-name selfRef">Table of Contents</a>
        </h2>
<nav class="toc"><ul class="toc ulEmpty ulBare compact">
<li class="toc ulEmpty ulBare compact" id="section-toc.1-1.1">
            <p id="section-toc.1-1.1.1" class="keepWithNext"><a href="#section-1" class="xref">1</a>.  <a href="#name-introduction" class="xref">Introduction</a></p>
<ul class="toc compact ulBare ulEmpty">
<li class="toc compact ulBare ulEmpty" id="section-toc.1-1.1.2.1">
                <p id="section-toc.1-1.1.2.1.1" class="keepWithNext"><a href="#section-1.1" class="xref">1.1</a>.  <a href="#name-terminology-and-notations" class="xref">Terminology and Notations</a></p>
</li>
              <li class="toc compact ulBare ulEmpty" id="section-toc.1-1.1.2.2">
                <p id="section-toc.1-1.1.2.2.1" class="keepWithNext"><a href="#section-1.2" class="xref">1.2</a>.  <a href="#name-prefix-in-data-node-names" class="xref">Prefix in Data Node Names</a></p>
</li>
            </ul>
</li>
          <li class="toc ulEmpty ulBare compact" id="section-toc.1-1.2">
            <p id="section-toc.1-1.2.1"><a href="#section-2" class="xref">2</a>.  <a href="#name-layer-0-types-module-conten" class="xref">Layer 0 Types Module Contents</a></p>
</li>
          <li class="toc ulEmpty ulBare compact" id="section-toc.1-1.3">
            <p id="section-toc.1-1.3.1"><a href="#section-3" class="xref">3</a>.  <a href="#name-yang-module-for-layer-0-typ" class="xref">YANG Module for Layer 0 Types</a></p>
</li>
          <li class="toc ulEmpty ulBare compact" id="section-toc.1-1.4">
            <p id="section-toc.1-1.4.1"><a href="#section-4" class="xref">4</a>.  <a href="#name-security-considerations" class="xref">Security Considerations</a></p>
</li>
          <li class="toc ulEmpty ulBare compact" id="section-toc.1-1.5">
            <p id="section-toc.1-1.5.1"><a href="#section-5" class="xref">5</a>.  <a href="#name-iana-considerations" class="xref">IANA Considerations</a></p>
</li>
          <li class="toc ulEmpty ulBare compact" id="section-toc.1-1.6">
            <p id="section-toc.1-1.6.1"><a href="#section-6" class="xref">6</a>.  <a href="#name-references" class="xref">References</a></p>
<ul class="toc compact ulBare ulEmpty">
<li class="toc compact ulBare ulEmpty" id="section-toc.1-1.6.2.1">
                <p id="section-toc.1-1.6.2.1.1"><a href="#section-6.1" class="xref">6.1</a>.  <a href="#name-normative-references" class="xref">Normative References</a></p>
</li>
              <li class="toc compact ulBare ulEmpty" id="section-toc.1-1.6.2.2">
                <p id="section-toc.1-1.6.2.2.1"><a href="#section-6.2" class="xref">6.2</a>.  <a href="#name-informative-references" class="xref">Informative References</a></p>
</li>
            </ul>
</li>
          <li class="toc ulEmpty ulBare compact" id="section-toc.1-1.7">
            <p id="section-toc.1-1.7.1"><a href="#appendix-A" class="xref"></a><a href="#name-acknowledgements" class="xref">Acknowledgements</a></p>
</li>
          <li class="toc ulEmpty ulBare compact" id="section-toc.1-1.8">
            <p id="section-toc.1-1.8.1"><a href="#appendix-B" class="xref"></a><a href="#name-contributors" class="xref">Contributors</a></p>
</li>
          <li class="toc ulEmpty ulBare compact" id="section-toc.1-1.9">
            <p id="section-toc.1-1.9.1"><a href="#appendix-C" class="xref"></a><a href="#name-authors-addresses" class="xref">Authors' Addresses</a></p>
</li>
        </ul>
</nav>
</section>
</div>
<section id="section-1">
      <h2 id="name-introduction">
<a href="#section-1" class="section-number selfRef">1. </a><a href="#name-introduction" class="section-name selfRef">Introduction</a>
      </h2>
<p id="section-1-1">
  YANG <span>[<a href="#RFC7950" class="xref">RFC7950</a>]</span> is a data modeling language used to model configuration data, state data, Remote Procedure Calls, and notifications for network management protocols such as the Network Configuration Protocol (NETCONF) <span>[<a href="#RFC6241" class="xref">RFC6241</a>]</span>.  The YANG language supports a small set of built-in data types and provides mechanisms to derive other types from the built-in types.<a href="#section-1-1" class="pilcrow">¶</a></p>
<p id="section-1-2">
  This document introduces a collection of common data types derived from the built-in YANG data types.  The derived types and groupings are designed to be the common types applicable for modeling Traffic Engineering (TE) features as well as non-TE features (e.g., physical network configuration aspects) for Layer 0 optical networks in model(s) defined outside of this document.  The applicability of Layer 0 types specified in this document includes Wavelength Switched Optical Networks (WSONs) <span>[<a href="#RFC6163" class="xref">RFC6163</a>]</span> <span>[<a href="#ITU-Tg6982" class="xref">ITU-Tg6982</a>]</span> and flexi-grid Dense Wavelength Division Multiplexing (DWDM) networks <span>[<a href="#RFC7698" class="xref">RFC7698</a>]</span> <span>[<a href="#ITU-Tg6941" class="xref">ITU-Tg6941</a>]</span>.<a href="#section-1-2" class="pilcrow">¶</a></p>
<section id="section-1.1">
        <h3 id="name-terminology-and-notations">
<a href="#section-1.1" class="section-number selfRef">1.1. </a><a href="#name-terminology-and-notations" class="section-name selfRef">Terminology and Notations</a>
        </h3>
<p id="section-1.1-1">
   Refer to <span>[<a href="#RFC7446" class="xref">RFC7446</a>]</span> and <span>[<a href="#RFC7581" class="xref">RFC7581</a>]</span> for the key terms used in this document, and the terminology for describing YANG data models can be found in <span>[<a href="#RFC7950" class="xref">RFC7950</a>]</span>.<a href="#section-1.1-1" class="pilcrow">¶</a></p>
<p id="section-1.1-2">   
   The YANG data model in this document conforms to the Network Management Datastore Architecture defined in <span>[<a href="#RFC8342" class="xref">RFC8342</a>]</span>.<a href="#section-1.1-2" class="pilcrow">¶</a></p>
</section>
<section id="section-1.2">
        <h3 id="name-prefix-in-data-node-names">
<a href="#section-1.2" class="section-number selfRef">1.2. </a><a href="#name-prefix-in-data-node-names" class="section-name selfRef">Prefix in Data Node Names</a>
        </h3>
<p id="section-1.2-1">
   In this document, names of data nodes and other data model objects are prefixed using the standard prefix associated with the corresponding YANG imported modules.<a href="#section-1.2-1" class="pilcrow">¶</a></p>
<span id="name-data-node-names"></span><div id="table_1">
<table class="center" id="table-1">
          <caption>
<a href="#table-1" class="selfRef">Table 1</a>:
<a href="#name-data-node-names" class="selfRef">Data Node Names</a>
          </caption>
<thead>
            <tr>
              <th class="text-left" rowspan="1" colspan="1">Prefix</th>
              <th class="text-left" rowspan="1" colspan="1">YANG module</th>
              <th class="text-left" rowspan="1" colspan="1">Reference</th>
            </tr>
          </thead>
          <tbody>
            <tr>
              <td class="text-left" rowspan="1" colspan="1">l0-types</td>
              <td class="text-left" rowspan="1" colspan="1">ietf-layer0-types</td>
              <td class="text-left" rowspan="1" colspan="1">RFC 9093</td>
            </tr>
          </tbody>
        </table>
</div>
<p id="section-1.2-3">
  The YANG module "ietf-layer0-types" (defined in <a href="#code" class="xref">Section 3</a>) references 
   <span>[<a href="#RFC4203" class="xref">RFC4203</a>]</span>, <span>[<a href="#RFC6163" class="xref">RFC6163</a>]</span>, <span>[<a href="#RFC6205" class="xref">RFC6205</a>]</span>, <span>[<a href="#RFC7698" class="xref">RFC7698</a>]</span>, <span>[<a href="#RFC7699" class="xref">RFC7699</a>]</span>, <span>[<a href="#RFC8363" class="xref">RFC8363</a>]</span>,
   <span>[<a href="#ITU-Tg6941" class="xref">ITU-Tg6941</a>]</span>, and <span>[<a href="#ITU-Tg6942" class="xref">ITU-Tg6942</a>]</span>.<a href="#section-1.2-3" class="pilcrow">¶</a></p>
</section>
</section>
<div id="DM">
<section id="section-2">
      <h2 id="name-layer-0-types-module-conten">
<a href="#section-2" class="section-number selfRef">2. </a><a href="#name-layer-0-types-module-conten" class="section-name selfRef">Layer 0 Types Module Contents</a>
      </h2>
<p id="section-2-1">
   This document defines a YANG module for common Layer 0 types, ietf-layer0-types. This module is used for WSON and flexi-grid DWDM networks.  The "ietf-layer0-types" module contains the following YANG reusable types and groupings:<a href="#section-2-1" class="pilcrow">¶</a></p>
<span class="break"></span><dl class="dlNewline" id="section-2-2">
        <dt id="section-2-2.1">l0-grid-type:
</dt>
        <dd style="margin-left: 1.5em" id="section-2-2.2">A base YANG identity for the grid type as defined in <span>[<a href="#RFC6163" class="xref">RFC6163</a>]</span> and <span>[<a href="#RFC7698" class="xref">RFC7698</a>]</span>.<a href="#section-2-2.2" class="pilcrow">¶</a>
</dd>
        <dd class="break"></dd>
<dt id="section-2-2.3">dwdm-ch-spc-type:
</dt>
        <dd style="margin-left: 1.5em" id="section-2-2.4">A base YANG identity for the DWDM channel-spacing type as defined in <span>[<a href="#RFC6205" class="xref">RFC6205</a>]</span>.<a href="#section-2-2.4" class="pilcrow">¶</a>
</dd>
        <dd class="break"></dd>
<dt id="section-2-2.5">cwdm-ch-spc-type:
</dt>
        <dd style="margin-left: 1.5em" id="section-2-2.6">A base YANG identity for the Coarse Wavelength Division Multiplexing
(CWDM) channel-spacing type as defined in <span>[<a href="#RFC6205" class="xref">RFC6205</a>]</span>.<a href="#section-2-2.6" class="pilcrow">¶</a>
</dd>
        <dd class="break"></dd>
<dt id="section-2-2.7">wson-label-start-end:
</dt>
        <dd style="margin-left: 1.5em" id="section-2-2.8">The WSON label range was defined in <span>[<a href="#RFC6205" class="xref">RFC6205</a>]</span>,
and the generic topology model defines the label-start/label-end in <span>[<a href="#RFC8795" class="xref">RFC8795</a>]</span>. This grouping shows the WSON-specific
label-start and label-end information.<a href="#section-2-2.8" class="pilcrow">¶</a>
</dd>
        <dd class="break"></dd>
<dt id="section-2-2.9">wson-label-hop:
</dt>
        <dd style="margin-left: 1.5em" id="section-2-2.10">The WSON label range was defined in <span>[<a href="#RFC6205" class="xref">RFC6205</a>]</span>,
and the generic topology model defines the label-hop in <span>[<a href="#RFC8795" class="xref">RFC8795</a>]</span>. This grouping shows the WSON-specific label-hop
information.<a href="#section-2-2.10" class="pilcrow">¶</a>
</dd>
        <dd class="break"></dd>
<dt id="section-2-2.11">l0-label-range-info:
</dt>
        <dd style="margin-left: 1.5em" id="section-2-2.12">A YANG grouping that defines the Layer 0 label range information
applicable for WSON as defined in <span>[<a href="#RFC6205" class="xref">RFC6205</a>]</span>. This grouping is used in the flexi-grid
DWDM by adding more flexi-grid-specific parameters.<a href="#section-2-2.12" class="pilcrow">¶</a>
</dd>
        <dd class="break"></dd>
<dt id="section-2-2.13">wson-label-step:
</dt>
        <dd style="margin-left: 1.5em" id="section-2-2.14">A YANG grouping that defines label steps for WSON as defined in <span>[<a href="#RFC8776" class="xref">RFC8776</a>]</span>.<a href="#section-2-2.14" class="pilcrow">¶</a>
</dd>
        <dd class="break"></dd>
<dt id="section-2-2.15">flexi-grid-label-start-end:
</dt>
        <dd style="margin-left: 1.5em" id="section-2-2.16">The flexi-grid label range was defined in <span>[<a href="#RFC7698" class="xref">RFC7698</a>]</span>, and the generic topology model defines the
label-start/label-end in <span>[<a href="#RFC8795" class="xref">RFC8795</a>]</span>. This
grouping shows the flexi-grid-specific label-start and label-end information.<a href="#section-2-2.16" class="pilcrow">¶</a>
</dd>
        <dd class="break"></dd>
<dt id="section-2-2.17">flexi-grid-label-hop:
</dt>
        <dd style="margin-left: 1.5em" id="section-2-2.18">The flexi-grid label range was defined in <span>[<a href="#RFC7698" class="xref">RFC7698</a>]</span>, and the generic topology model defines the label-hop in
<span>[<a href="#RFC8795" class="xref">RFC8795</a>]</span>. This grouping shows the
WSON-specific label-hop information.<a href="#section-2-2.18" class="pilcrow">¶</a>
</dd>
        <dd class="break"></dd>
<dt id="section-2-2.19">flexi-grid-label-range-info:
</dt>
        <dd style="margin-left: 1.5em" id="section-2-2.20">A YANG grouping that defines flexi-grid label range information as
defined in <span>[<a href="#RFC7698" class="xref">RFC7698</a>]</span> and <span>[<a href="#RFC8363" class="xref">RFC8363</a>]</span>.<a href="#section-2-2.20" class="pilcrow">¶</a>
</dd>
        <dd class="break"></dd>
<dt id="section-2-2.21">flexi-grid-label-step:
</dt>
        <dd style="margin-left: 1.5em" id="section-2-2.22"> A YANG grouping that defines flexi-grid label steps as defined in <span>[<a href="#RFC8776" class="xref">RFC8776</a>]</span>.<a href="#section-2-2.22" class="pilcrow">¶</a>
</dd>
      <dd class="break"></dd>
</dl>
</section>
</div>
<div id="code">
<section id="section-3">
      <h2 id="name-yang-module-for-layer-0-typ">
<a href="#section-3" class="section-number selfRef">3. </a><a href="#name-yang-module-for-layer-0-typ" class="section-name selfRef">YANG Module for Layer 0 Types</a>
      </h2>
<div id="section-3-1">
<pre class="sourcecode lang-yang">&lt;CODE BEGINS&gt; file "ietf-layer0-types@2021-08-13.yang"

module ietf-layer0-types {
  yang-version 1.1;
  namespace "urn:ietf:params:xml:ns:yang:ietf-layer0-types";
  prefix l0-types;

  organization
    "IETF CCAMP Working Group";
  contact
    "WG Web: &lt;https://datatracker.ietf.org/wg/ccamp/&gt;
     WG List: &lt;mailto:ccamp@ietf.org&gt;

     Editor: Haomian Zheng
       &lt;mailto:zhenghaomian@huawei.com&gt;

     Editor: Young Lee
       &lt;mailto:younglee.tx@gmail.com&gt;

     Editor: Aihua Guo
       &lt;mailto:aihuaguo.ietf@gmail.com&gt;

     Editor: Victor Lopez
       &lt;mailto:victor.lopez@nokia.com&gt;

     Editor: Daniel King
       &lt;mailto:d.king@lancaster.ac.uk&gt;";

  description
    "This module defines Optical Layer 0 types.  This module
     provides groupings that can be applicable to Layer 0
     Fixed Optical Networks (e.g., CWDM (Coarse Wavelength
     Division Multiplexing) and DWDM (Dense Wavelength Division
     Multiplexing)) and flexi-grid optical networks.

     Copyright (c) 2021 IETF Trust and the persons identified
     as authors of the code.  All rights reserved.

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

     This version of this YANG module is part of RFC 9093; see
     the RFC itself for full legal notices.";

  revision 2021-08-13 {
    description
      "Initial version";
    reference
      "RFC 9093: A YANG Data Model for Layer 0 Types";
  }

  typedef dwdm-n {
    type int16;
    description
      "The given value 'N' is used to determine the nominal central
       frequency.

       The nominal central frequency, 'f', is defined by:
         f = 193100.000 GHz + N x channel spacing (measured in GHz),

       where 193100.000 GHz (193.100000 THz) is the ITU-T 'anchor
       frequency' for transmission over the DWDM grid, and where
       'channel spacing' is defined by the dwdm-ch-spc-type.";
    reference
      "RFC6205: Generalized Labels for Lambda-Switch-Capable (LSC)
       Label Switching Routers,
       ITU-T G.694.1 (10/2020): Spectral grids for WDM applications:
       DWDM frequency grid";
  }

  typedef cwdm-n {
    type int16;
    description
      "The given value 'N' is used to determine the nominal central
       wavelength.

       The nominal central wavelength is defined by:
         Wavelength = 1471 nm + N x channel spacing (measured in nm)

       where 1471 nm is the conventional 'anchor wavelength' for
       transmission over the CWDM grid, and where 'channel spacing'
       is defined by the cwdm-ch-spc-type.";
    reference
      "RFC 6205: Generalized Labels for Lambda-Switch-Capable (LSC)
       Label Switching Routers,
       ITU-T G.694.2 (12/2003): Spectral grids for WDM applications:
       CWDM wavelength grid";
  }

  typedef flexi-n {
    type int16;
    description
      "The given value 'N' is used to determine the nominal central
       frequency.

       The nominal central frequency, 'f', is defined by:
         f = 193100.000 GHz + N x channel spacing (measured in GHz),

       where 193100.000 GHz (193.100000 THz) is the ITU-T 'anchor
       frequency' for transmission over the DWDM grid, and where
       'channel spacing' is defined by the flexi-ch-spc-type.

       Note that the term 'channel spacing' can be substituted by the
       term 'nominal central frequency granularity' defined in
       clause 8 of ITU-T G.694.1.";
    reference
      "RFC 7698: Framework and Requirements for GMPLS-Based Control
       of Flexi-Grid Dense Wavelength Division Multiplexing (DWDM)
       Networks,
       ITU-T G.694.1 (10/2020): Spectral grids for WDM applications:
       DWDM frequency grid";
  }

  typedef flexi-m {
    type uint16;
    description
      "The given value 'M' is used to determine the slot width.

       A slot width is defined by:
         slot width = M x SWG (measured in GHz),

       where SWG is defined by the flexi-slot-width-granularity.";
    reference
      "RFC 7698: Framework and Requirements for GMPLS-Based Control
       of Flexi-Grid Dense Wavelength Division Multiplexing (DWDM)
       Networks.
       ITU-T G.694.1 (10/2020): Spectral grids for WDM applications:
       DWDM frequency grid";
  }

  identity l0-grid-type {
    description
      "Layer 0 grid type";
    reference
      "RFC 6163: Framework for GMPLS and Path Computation Element
       (PCE) Control of Wavelength Switched Optical Networks (WSONs),
       ITU-T G.694.1 (10/2020): Spectral grids for WDM applications:
       DWDM frequency grid,
       ITU-T G.694.2 (12/2003): Spectral grids for WDM applications:
       CWDM wavelength grid";
  }

  identity flexi-grid-dwdm {
    base l0-grid-type;
    description
      "Flexi-grid";
    reference
      "RFC 7698: Framework and Requirements for GMPLS-Based Control
       of Flexi-Grid Dense Wavelength Division Multiplexing (DWDM)
       Networks,
       ITU-T G.694.1 (10/2020): Spectral grids for WDM applications:
       DWDM frequency grid";
  }

  identity wson-grid-dwdm {
    base l0-grid-type;
    description
      "DWDM grid";
    reference
      "RFC 6163:Framework for GMPLS and Path Computation Element
       (PCE) Control of Wavelength Switched Optical Networks (WSONs),
       ITU-T G.694.1 (10/2020): Spectral grids for WDM applications:
       DWDM frequency grid";
  }

  identity wson-grid-cwdm {
    base l0-grid-type;
    description
      "CWDM grid";
    reference
      "RFC 6205: Generalized Labels for Lambda-Switch-Capable (LSC)
       Label Switching Routers,
       ITU-T G.694.2 (12/2003): Spectral grids for WDM applications:
       CWDM wavelength grid";
  }

  identity dwdm-ch-spc-type {
    description
      "DWDM channel-spacing type";
    reference
      "RFC 6205: Generalized Labels for Lambda-Switch-Capable (LSC)
       Label Switching Routers,
       ITU-T G.694.1 (10/2020): Spectral grids for WDM applications:
       DWDM frequency grid";
  }

  identity dwdm-100ghz {
    base dwdm-ch-spc-type;
    description
      "100 GHz channel spacing";
  }

  identity dwdm-50ghz {
    base dwdm-ch-spc-type;
    description
      "50 GHz channel spacing";
  }

  identity dwdm-25ghz {
    base dwdm-ch-spc-type;
    description
      "25 GHz channel spacing";
  }

  identity dwdm-12p5ghz {
    base dwdm-ch-spc-type;
    description
      "12.5 GHz channel spacing";
  }

  identity flexi-ch-spc-type {
    description
      "Flexi-grid channel-spacing type";
    reference
      "RFC 7698: Framework and Requirements for GMPLS-Based Control
       of Flexi-Grid Dense Wavelength Division Multiplexing (DWDM)
       Networks,
       ITU-T G.694.1 (10/2020): Spectral grids for WDM applications:
       DWDM frequency grid";
  }

  identity flexi-ch-spc-6p25ghz {
    base flexi-ch-spc-type;
    description
      "6.25 GHz channel spacing";
  }

  identity flexi-slot-width-granularity {
    description
      "Flexi-grid slot width granularity";
  }

  identity flexi-swg-12p5ghz {
    base flexi-slot-width-granularity;
    description
      "12.5 GHz slot width granularity";
  }

  identity cwdm-ch-spc-type {
    description
      "CWDM channel-spacing type";
    reference
      "RFC 6205: Generalized Labels for Lambda-Switch-Capable (LSC)
       Label Switching Routers,
       ITU-T G.694.2 (12/2003): Spectral grids for WDM applications:
       CWDM wavelength grid";
  }

  identity cwdm-20nm {
    base cwdm-ch-spc-type;
    description
      "20nm channel spacing";
  }

  /* Groupings. */

  grouping wson-label-start-end {
    description
      "The WSON label-start or label-end used to specify WSON label
       range.";
    choice grid-type {
      description
        "Label for DWDM or CWDM grid";
      case dwdm {
        leaf dwdm-n {
          when "derived-from-or-self(../../../grid-type,
                \"wson-grid-dwdm\")" {
            description
              "Valid only when grid type is DWDM.";
          }
          type l0-types:dwdm-n;
          description
            "The central frequency of DWDM.";
          reference
            "RFC 6205: Generalized Labels for Lambda-Switch-Capable
             (LSC) Label Switching Routers";
        }
      }
      case cwdm {
        leaf cwdm-n {
          when "derived-from-or-self(../../../grid-type,
                \"wson-grid-cwdm\")" {
            description
              "Valid only when grid type is CWDM.";
          }
          type l0-types:cwdm-n;
          description
            "Channel wavelength computing input.";
          reference
            "RFC 6205: Generalized Labels for Lambda-Switch-Capable
             (LSC) Label Switching Routers";
        }
      }
    }
    reference
      "RFC 6205: Generalized Labels for Lambda-Switch-Capable (LSC)
       Label Switching Routers";
  }

  grouping wson-label-hop {
    description
      "Generic label-hop information for WSON";
    choice grid-type {
      description
        "Label for DWDM or CWDM grid";
      case dwdm {
        choice single-or-super-channel {
          description
            "single or super channel";
          case single {
            leaf dwdm-n {
              type l0-types:dwdm-n;
              description
                "The given value 'N' is used to determine the
                 nominal central frequency.";
            }
          }
          case super {
            leaf-list subcarrier-dwdm-n {
              type l0-types:dwdm-n;
              description
                "The given values 'N' are used to determine the
                 nominal central frequency for each subcarrier
                 channel.";
              reference
                "ITU-T Recommendation G.694.1: Spectral grids for
                 WDM applications: DWDM frequency grid";
            }
          }
        }
      }
      case cwdm {
        leaf cwdm-n {
          type l0-types:cwdm-n;
          description
            "The given value 'N' is used to determine the nominal
             central wavelength.";
          reference
            "RFC 6205: Generalized Labels for Lambda-Switch-Capable
             (LSC) Label Switching Routers";
        }
      }
    }
    reference
      "RFC 6205: Generalized Labels for Lambda-Switch-Capable (LSC)
       Label Switching Routers";
  }

  grouping l0-label-range-info {
    description
      "Information about Layer 0 label range.";
    leaf grid-type {
      type identityref {
        base l0-grid-type;
      }
      description
        "Grid type";
    }
    leaf priority {
      type uint8;
      description
        "Priority in Interface Switching Capability Descriptor
         (ISCD).";
      reference
        "RFC 4203: OSPF Extensions in Support of Generalized
         Multi-Protocol Label Switching (GMPLS)";
    }
    reference
      "RFC 6205: Generalized Labels for Lambda-Switch-Capable (LSC)
       Label Switching Routers";
  }

  grouping wson-label-step {
    description
      "Label step information for WSON";
    choice l0-grid-type {
      description
        "Grid type: DWDM, CWDM, etc.";
      case dwdm {
        leaf wson-dwdm-channel-spacing {
          when "derived-from-or-self(../../grid-type,
                \"wson-grid-dwdm\")" {
            description
              "Valid only when grid type is DWDM.";
          }
          type identityref {
            base dwdm-ch-spc-type;
          }
          description
            "Label-step is the channel spacing (GHz), e.g., 100.000,
             50.000, 25.000, or 12.500 GHz for DWDM.";
          reference
            "RFC 6205: Generalized Labels for Lambda-Switch-Capable
             (LSC) Label Switching Routers";
        }
      }
      case cwdm {
        leaf wson-cwdm-channel-spacing {
          when "derived-from-or-self(../../grid-type,
                \"wson-grid-cwdm\")" {
            description
              "Valid only when grid type is CWDM.";
          }
          type identityref {
            base cwdm-ch-spc-type;
          }
          description
            "Label-step is the channel spacing (nm), i.e., 20 nm
             for CWDM, which is the only value defined for CWDM.";
          reference
            "RFC 6205: Generalized Labels for Lambda-Switch-Capable
             (LSC) Label Switching Routers";
        }
      }
    }
    reference
      "RFC 6205: Generalized Labels for Lambda-Switch-Capable (LSC)
       Label Switching Routers,
       ITU-T G.694.2 (12/2003): Spectral grids for WDM applications:
       CWDM wavelength grid";
  }

  grouping flexi-grid-label-start-end {
    description
      "The flexi-grid label-start or label-end used to specify
       flexi-grid label range.";
    leaf flexi-n {
      type l0-types:flexi-n;
      description
        "The given value 'N' is used to determine the nominal
         central frequency.";
    }
    reference
      "RFC 7698: Framework and Requirements for GMPLS-Based Control
       of Flexi-Grid Dense Wavelength Division Multiplexing (DWDM)
       Networks";
  }

  grouping flexi-grid-frequency-slot {
    description
      "Flexi-grid frequency slot grouping.";
    uses flexi-grid-label-start-end;
    leaf flexi-m {
      type l0-types:flexi-m;
      description
        "The given value 'M' is used to determine the slot width.";
    }
    reference
      "RFC 7698: Framework and Requirements for GMPLS-Based Control
       of Flexi-Grid Dense Wavelength Division Multiplexing (DWDM)
       Networks";
  }

  grouping flexi-grid-label-hop {
    description
      "Generic label-hop information for flexi-grid";
    choice single-or-super-channel {
      description
        "single or super channel";
      case single {
        uses flexi-grid-frequency-slot;
      }
      case super {
        list subcarrier-flexi-n {
          key "flexi-n";
          uses flexi-grid-frequency-slot;
          description
            "List of subcarrier channels for flexi-grid super
             channel.";
        }
      }
    }
    reference
      "RFC 7698: Framework and Requirements for GMPLS-Based Control
       of Flexi-Grid Dense Wavelength Division Multiplexing (DWDM)
       Networks";
  }

  grouping flexi-grid-label-range-info {
    description
      "Flexi-grid-specific label range related information";
    uses l0-label-range-info;
    container flexi-grid {
      description
        "flexi-grid definition";
      leaf slot-width-granularity {
        type identityref {
          base flexi-slot-width-granularity;
        }
        default "flexi-swg-12p5ghz";
        description
          "Minimum space between slot widths. Default is 12.500
           GHz.";
        reference
          "RFC 7698: Framework and Requirements for GMPLS-Based
           Control of Flexi-Grid Dense Wavelength Division
           Multiplexing (DWDM) Networks";
      }
      leaf min-slot-width-factor {
        type uint16 {
          range "1..max";
        }
        default "1";
        description
          "A multiplier of the slot width granularity, indicating
           the minimum slot width supported by an optical port.

           Minimum slot width is calculated by:
             Minimum slot width (GHz) =
               min-slot-width-factor * slot-width-granularity.";
        reference
          "RFC 8363: GMPLS OSPF-TE Extensions in Support of Flexi-
           Grid Dense Wavelength Division Multiplexing (DWDM)
           Networks";
      }

      leaf max-slot-width-factor {
        type uint16 {
          range "1..max";
        }
        must '. &gt;= ../min-slot-width-factor' {
          error-message
            "Maximum slot width must be greater than or equal to
             minimum slot width.";
        }
        description
          "A multiplier of the slot width granularity, indicating
           the maximum slot width supported by an optical port.

           Maximum slot width is calculated by:
             Maximum slot width (GHz) =
               max-slot-width-factor * slot-width-granularity

           If specified, maximum slot width must be greater than or
           equal to minimum slot width.  If not specified, maximum
           slot width is equal to minimum slot width.";
        reference
          "RFC 8363: GMPLS OSPF-TE Extensions in Support of Flexi-
           Grid Dense Wavelength Division Multiplexing (DWDM)
           Networks";
      }
    }
  }

  grouping flexi-grid-label-step {
    description
      "Label step information for flexi-grid";
    leaf flexi-grid-channel-spacing {
      type identityref {
        base flexi-ch-spc-type;
      }
      default "flexi-ch-spc-6p25ghz";
      description
        "Label-step is the nominal central frequency granularity
         (GHz), e.g., 6.25 GHz.";
      reference
        "RFC 7699: Generalized Labels for the Flexi-Grid in Lambda
         Switch Capable (LSC) Label Switching Routers";
    }
    leaf flexi-n-step {
      type uint8;
      description
        "This attribute defines the multiplier for the supported
         values of 'N'.

         For example, given a grid with a nominal central frequency
         granularity of 6.25 GHz, the granularity of the supported
         values of the nominal central frequency could be 12.5 GHz.
         In this case, the values of flexi-n should be even and this
         constraint is reported by setting the flexi-n-step to 2.

         This attribute is also known as central frequency
         granularity in RFC 8363.";
      reference
        "RFC 8363: GMPLS OSPF-TE Extensions in Support of Flexi-Grid
         Dense Wavelength Division Multiplexing (DWDM) Networks";
    }
  }
}

&lt;CODE ENDS&gt;</pre><a href="#section-3-1" class="pilcrow">¶</a>
</div>
</section>
</div>
<div id="Security">
<section id="section-4">
      <h2 id="name-security-considerations">
<a href="#section-4" class="section-number selfRef">4. </a><a href="#name-security-considerations" class="section-name selfRef">Security Considerations</a>
      </h2>
<p id="section-4-1">
   The YANG module specified in this document defines a schema for data that is designed to be accessed via network management protocols such as NETCONF <span>[<a href="#RFC6241" class="xref">RFC6241</a>]</span> or RESTCONF <span>[<a href="#RFC8040" class="xref">RFC8040</a>]</span>.  The lowest NETCONF layer is the secure transport layer, and the mandatory-to-implement secure transport is Secure Shell (SSH) <span>[<a href="#RFC6242" class="xref">RFC6242</a>]</span>.  The lowest RESTCONF layer is HTTPS, and the mandatory-to-implement secure transport is TLS <span>[<a href="#RFC8446" class="xref">RFC8446</a>]</span>.<a href="#section-4-1" class="pilcrow">¶</a></p>
<p id="section-4-2">
The Network Configuration Access Control Model (NACM) <span>[<a href="#RFC8341" class="xref">RFC8341</a>]</span>
provides the means to restrict access for particular NETCONF or
RESTCONF users to a preconfigured subset of all available NETCONF or
RESTCONF protocol operations and content. The NETCONF protocol over Secure Shell (SSH) specification <span>[<a href="#RFC6242" class="xref">RFC6242</a>]</span> describes a method for invoking and running NETCONF within a Secure Shell (SSH) session as an SSH subsystem.<a href="#section-4-2" class="pilcrow">¶</a></p>
<p id="section-4-3">
  The objects in this YANG module are common data types and groupings. No object in this module can be read or written to. These definitions can be imported and used by other Layer 0 specific modules. It is critical to consider how imported definitions will be utilized and accessible via RPC operations, as the resultant schema will have data nodes that can be writable, or readable, and will have a significant effect on the network operations if used incorrectly or maliciously. All of these considerations belong in the document that defines the modules that import from this YANG module. Therefore, it is important to manage access to resultant data nodes that are considered sensitive or vulnerable in some network environments.<a href="#section-4-3" class="pilcrow">¶</a></p>
<p id="section-4-4">
   The security considerations spelled out in the YANG 1.1 specification <span>[<a href="#RFC7950" class="xref">RFC7950</a>]</span> apply for this document as well.<a href="#section-4-4" class="pilcrow">¶</a></p>
</section>
</div>
<div id="IANA">
<section id="section-5">
      <h2 id="name-iana-considerations">
<a href="#section-5" class="section-number selfRef">5. </a><a href="#name-iana-considerations" class="section-name selfRef">IANA Considerations</a>
      </h2>
<p id="section-5-1">
  IANA has assigned new URIs from the "IETF XML Registry" <span>[<a href="#RFC3688" class="xref">RFC3688</a>]</span> as follows:<a href="#section-5-1" class="pilcrow">¶</a></p>
<span class="break"></span><dl class="dlParallel dlCompact" id="section-5-2">
        <dt id="section-5-2.1">URI:
</dt>
        <dd style="margin-left: 1.5em" id="section-5-2.2">urn:ietf:params:xml:ns:yang:ietf-layer0-types<a href="#section-5-2.2" class="pilcrow">¶</a>
</dd>
        <dd class="break"></dd>
<dt id="section-5-2.3">Registrant Contact:
</dt>
        <dd style="margin-left: 1.5em" id="section-5-2.4">The IESG<a href="#section-5-2.4" class="pilcrow">¶</a>
</dd>
        <dd class="break"></dd>
<dt id="section-5-2.5">XML:
</dt>
        <dd style="margin-left: 1.5em" id="section-5-2.6">N/A; the requested URI is an XML namespace.<a href="#section-5-2.6" class="pilcrow">¶</a>
</dd>
      <dd class="break"></dd>
</dl>
<p id="section-5-3"> 
   This document registers the following YANG module in the "YANG Module Names" registry <span>[<a href="#RFC7950" class="xref">RFC7950</a>]</span>.<a href="#section-5-3" class="pilcrow">¶</a></p>
<span class="break"></span><dl class="dlParallel dlCompact" id="section-5-4">
        <dt id="section-5-4.1">Name:
</dt>
        <dd style="margin-left: 1.5em" id="section-5-4.2">ietf-layer0-types<a href="#section-5-4.2" class="pilcrow">¶</a>
</dd>
        <dd class="break"></dd>
<dt id="section-5-4.3">Namespace:
</dt>
        <dd style="margin-left: 1.5em" id="section-5-4.4">urn:ietf:params:xml:ns:yang:ietf-layer0-types<a href="#section-5-4.4" class="pilcrow">¶</a>
</dd>
        <dd class="break"></dd>
<dt id="section-5-4.5">Prefix:
</dt>
        <dd style="margin-left: 1.5em" id="section-5-4.6">l0-types<a href="#section-5-4.6" class="pilcrow">¶</a>
</dd>
        <dd class="break"></dd>
<dt id="section-5-4.7">Reference:
</dt>
        <dd style="margin-left: 1.5em" id="section-5-4.8">RFC 9093<a href="#section-5-4.8" class="pilcrow">¶</a>
</dd>
      <dd class="break"></dd>
</dl>
</section>
</div>
<section id="section-6">
      <h2 id="name-references">
<a href="#section-6" class="section-number selfRef">6. </a><a href="#name-references" class="section-name selfRef">References</a>
      </h2>
<section id="section-6.1">
        <h3 id="name-normative-references">
<a href="#section-6.1" class="section-number selfRef">6.1. </a><a href="#name-normative-references" class="section-name selfRef">Normative References</a>
        </h3>
<dl class="references">
<dt id="ITU-Tg6982">[ITU-Tg6982]</dt>
        <dd>
<span class="refAuthor">ITU-T</span>, <span class="refTitle">"Amplified multichannel dense wavelength division multiplexing applications with single channel optical interfaces"</span>, <span class="refContent">ITU-T Recommendation G.698.2</span>, <time datetime="2018-11" class="refDate">November 2018</time>. </dd>
<dd class="break"></dd>
<dt id="RFC4203">[RFC4203]</dt>
        <dd>
<span class="refAuthor">Kompella, K., Ed.</span> and <span class="refAuthor">Y. Rekhter, Ed.</span>, <span class="refTitle">"OSPF Extensions in Support of Generalized Multi-Protocol Label Switching (GMPLS)"</span>, <span class="seriesInfo">RFC 4203</span>, <span class="seriesInfo">DOI 10.17487/RFC4203</span>, <time datetime="2005-10" class="refDate">October 2005</time>, <span>&lt;<a href="https://www.rfc-editor.org/info/rfc4203">https://www.rfc-editor.org/info/rfc4203</a>&gt;</span>. </dd>
<dd class="break"></dd>
<dt id="RFC6163">[RFC6163]</dt>
        <dd>
<span class="refAuthor">Lee, Y., Ed.</span>, <span class="refAuthor">Bernstein, G., Ed.</span>, and <span class="refAuthor">W. Imajuku</span>, <span class="refTitle">"Framework for GMPLS and Path Computation Element (PCE) Control of Wavelength Switched Optical Networks (WSONs)"</span>, <span class="seriesInfo">RFC 6163</span>, <span class="seriesInfo">DOI 10.17487/RFC6163</span>, <time datetime="2011-04" class="refDate">April 2011</time>, <span>&lt;<a href="https://www.rfc-editor.org/info/rfc6163">https://www.rfc-editor.org/info/rfc6163</a>&gt;</span>. </dd>
<dd class="break"></dd>
<dt id="RFC6205">[RFC6205]</dt>
        <dd>
<span class="refAuthor">Otani, T., Ed.</span> and <span class="refAuthor">D. Li, Ed.</span>, <span class="refTitle">"Generalized Labels for Lambda-Switch-Capable (LSC) Label Switching Routers"</span>, <span class="seriesInfo">RFC 6205</span>, <span class="seriesInfo">DOI 10.17487/RFC6205</span>, <time datetime="2011-03" class="refDate">March 2011</time>, <span>&lt;<a href="https://www.rfc-editor.org/info/rfc6205">https://www.rfc-editor.org/info/rfc6205</a>&gt;</span>. </dd>
<dd class="break"></dd>
<dt id="RFC6241">[RFC6241]</dt>
        <dd>
<span class="refAuthor">Enns, R., Ed.</span>, <span class="refAuthor">Bjorklund, M., Ed.</span>, <span class="refAuthor">Schoenwaelder, J., Ed.</span>, and <span class="refAuthor">A. Bierman, Ed.</span>, <span class="refTitle">"Network Configuration Protocol (NETCONF)"</span>, <span class="seriesInfo">RFC 6241</span>, <span class="seriesInfo">DOI 10.17487/RFC6241</span>, <time datetime="2011-06" class="refDate">June 2011</time>, <span>&lt;<a href="https://www.rfc-editor.org/info/rfc6241">https://www.rfc-editor.org/info/rfc6241</a>&gt;</span>. </dd>
<dd class="break"></dd>
<dt id="RFC6242">[RFC6242]</dt>
        <dd>
<span class="refAuthor">Wasserman, M.</span>, <span class="refTitle">"Using the NETCONF Protocol over Secure Shell (SSH)"</span>, <span class="seriesInfo">RFC 6242</span>, <span class="seriesInfo">DOI 10.17487/RFC6242</span>, <time datetime="2011-06" class="refDate">June 2011</time>, <span>&lt;<a href="https://www.rfc-editor.org/info/rfc6242">https://www.rfc-editor.org/info/rfc6242</a>&gt;</span>. </dd>
<dd class="break"></dd>
<dt id="RFC7698">[RFC7698]</dt>
        <dd>
<span class="refAuthor">Gonzalez de Dios, O., Ed.</span>, <span class="refAuthor">Casellas, R., Ed.</span>, <span class="refAuthor">Zhang, F.</span>, <span class="refAuthor">Fu, X.</span>, <span class="refAuthor">Ceccarelli, D.</span>, and <span class="refAuthor">I. Hussain</span>, <span class="refTitle">"Framework and Requirements for GMPLS-Based Control of Flexi-Grid Dense Wavelength Division Multiplexing (DWDM) Networks"</span>, <span class="seriesInfo">RFC 7698</span>, <span class="seriesInfo">DOI 10.17487/RFC7698</span>, <time datetime="2015-11" class="refDate">November 2015</time>, <span>&lt;<a href="https://www.rfc-editor.org/info/rfc7698">https://www.rfc-editor.org/info/rfc7698</a>&gt;</span>. </dd>
<dd class="break"></dd>
<dt id="RFC7699">[RFC7699]</dt>
        <dd>
<span class="refAuthor">Farrel, A.</span>, <span class="refAuthor">King, D.</span>, <span class="refAuthor">Li, Y.</span>, and <span class="refAuthor">F. Zhang</span>, <span class="refTitle">"Generalized Labels for the Flexi-Grid in Lambda Switch Capable (LSC) Label Switching Routers"</span>, <span class="seriesInfo">RFC 7699</span>, <span class="seriesInfo">DOI 10.17487/RFC7699</span>, <time datetime="2015-11" class="refDate">November 2015</time>, <span>&lt;<a href="https://www.rfc-editor.org/info/rfc7699">https://www.rfc-editor.org/info/rfc7699</a>&gt;</span>. </dd>
<dd class="break"></dd>
<dt id="RFC7950">[RFC7950]</dt>
        <dd>
<span class="refAuthor">Bjorklund, M., Ed.</span>, <span class="refTitle">"The YANG 1.1 Data Modeling Language"</span>, <span class="seriesInfo">RFC 7950</span>, <span class="seriesInfo">DOI 10.17487/RFC7950</span>, <time datetime="2016-08" class="refDate">August 2016</time>, <span>&lt;<a href="https://www.rfc-editor.org/info/rfc7950">https://www.rfc-editor.org/info/rfc7950</a>&gt;</span>. </dd>
<dd class="break"></dd>
<dt id="RFC8040">[RFC8040]</dt>
        <dd>
<span class="refAuthor">Bierman, A.</span>, <span class="refAuthor">Bjorklund, M.</span>, and <span class="refAuthor">K. Watsen</span>, <span class="refTitle">"RESTCONF Protocol"</span>, <span class="seriesInfo">RFC 8040</span>, <span class="seriesInfo">DOI 10.17487/RFC8040</span>, <time datetime="2017-01" class="refDate">January 2017</time>, <span>&lt;<a href="https://www.rfc-editor.org/info/rfc8040">https://www.rfc-editor.org/info/rfc8040</a>&gt;</span>. </dd>
<dd class="break"></dd>
<dt id="RFC8341">[RFC8341]</dt>
        <dd>
<span class="refAuthor">Bierman, A.</span> and <span class="refAuthor">M. Bjorklund</span>, <span class="refTitle">"Network Configuration Access Control Model"</span>, <span class="seriesInfo">STD 91</span>, <span class="seriesInfo">RFC 8341</span>, <span class="seriesInfo">DOI 10.17487/RFC8341</span>, <time datetime="2018-03" class="refDate">March 2018</time>, <span>&lt;<a href="https://www.rfc-editor.org/info/rfc8341">https://www.rfc-editor.org/info/rfc8341</a>&gt;</span>. </dd>
<dd class="break"></dd>
<dt id="RFC8342">[RFC8342]</dt>
        <dd>
<span class="refAuthor">Bjorklund, M.</span>, <span class="refAuthor">Schoenwaelder, J.</span>, <span class="refAuthor">Shafer, P.</span>, <span class="refAuthor">Watsen, K.</span>, and <span class="refAuthor">R. Wilton</span>, <span class="refTitle">"Network Management Datastore Architecture (NMDA)"</span>, <span class="seriesInfo">RFC 8342</span>, <span class="seriesInfo">DOI 10.17487/RFC8342</span>, <time datetime="2018-03" class="refDate">March 2018</time>, <span>&lt;<a href="https://www.rfc-editor.org/info/rfc8342">https://www.rfc-editor.org/info/rfc8342</a>&gt;</span>. </dd>
<dd class="break"></dd>
<dt id="RFC8363">[RFC8363]</dt>
        <dd>
<span class="refAuthor">Zhang, X.</span>, <span class="refAuthor">Zheng, H.</span>, <span class="refAuthor">Casellas, R.</span>, <span class="refAuthor">Gonzalez de Dios, O.</span>, and <span class="refAuthor">D. Ceccarelli</span>, <span class="refTitle">"GMPLS OSPF-TE Extensions in Support of Flexi-Grid Dense Wavelength Division Multiplexing (DWDM) Networks"</span>, <span class="seriesInfo">RFC 8363</span>, <span class="seriesInfo">DOI 10.17487/RFC8363</span>, <time datetime="2018-05" class="refDate">May 2018</time>, <span>&lt;<a href="https://www.rfc-editor.org/info/rfc8363">https://www.rfc-editor.org/info/rfc8363</a>&gt;</span>. </dd>
<dd class="break"></dd>
<dt id="RFC8446">[RFC8446]</dt>
        <dd>
<span class="refAuthor">Rescorla, E.</span>, <span class="refTitle">"The Transport Layer Security (TLS) Protocol Version 1.3"</span>, <span class="seriesInfo">RFC 8446</span>, <span class="seriesInfo">DOI 10.17487/RFC8446</span>, <time datetime="2018-08" class="refDate">August 2018</time>, <span>&lt;<a href="https://www.rfc-editor.org/info/rfc8446">https://www.rfc-editor.org/info/rfc8446</a>&gt;</span>. </dd>
<dd class="break"></dd>
<dt id="RFC8776">[RFC8776]</dt>
        <dd>
<span class="refAuthor">Saad, T.</span>, <span class="refAuthor">Gandhi, R.</span>, <span class="refAuthor">Liu, X.</span>, <span class="refAuthor">Beeram, V.</span>, and <span class="refAuthor">I. Bryskin</span>, <span class="refTitle">"Common YANG Data Types for Traffic Engineering"</span>, <span class="seriesInfo">RFC 8776</span>, <span class="seriesInfo">DOI 10.17487/RFC8776</span>, <time datetime="2020-06" class="refDate">June 2020</time>, <span>&lt;<a href="https://www.rfc-editor.org/info/rfc8776">https://www.rfc-editor.org/info/rfc8776</a>&gt;</span>. </dd>
<dd class="break"></dd>
<dt id="RFC8795">[RFC8795]</dt>
      <dd>
<span class="refAuthor">Liu, X.</span>, <span class="refAuthor">Bryskin, I.</span>, <span class="refAuthor">Beeram, V.</span>, <span class="refAuthor">Saad, T.</span>, <span class="refAuthor">Shah, H.</span>, and <span class="refAuthor">O. Gonzalez de Dios</span>, <span class="refTitle">"YANG Data Model for Traffic Engineering (TE) Topologies"</span>, <span class="seriesInfo">RFC 8795</span>, <span class="seriesInfo">DOI 10.17487/RFC8795</span>, <time datetime="2020-08" class="refDate">August 2020</time>, <span>&lt;<a href="https://www.rfc-editor.org/info/rfc8795">https://www.rfc-editor.org/info/rfc8795</a>&gt;</span>. </dd>
<dd class="break"></dd>
</dl>
</section>
<section id="section-6.2">
        <h3 id="name-informative-references">
<a href="#section-6.2" class="section-number selfRef">6.2. </a><a href="#name-informative-references" class="section-name selfRef">Informative References</a>
        </h3>
<dl class="references">
<dt id="ITU-Tg6941">[ITU-Tg6941]</dt>
        <dd>
<span class="refAuthor">ITU-T</span>, <span class="refTitle">"Spectral grids for WDM applications: DWDM frequency grid"</span>, <span class="seriesInfo">ITU-T Recommendation G.694.1</span>, <time datetime="2020-10" class="refDate">October 2020</time>. </dd>
<dd class="break"></dd>
<dt id="ITU-Tg6942">[ITU-Tg6942]</dt>
        <dd>
<span class="refAuthor">ITU-T</span>, <span class="refTitle">"Spectral grids for WDM applications: CWDM wavelength grid"</span>, <span class="seriesInfo">ITU-T Recommendation G.694.2</span>, <time datetime="2003-12" class="refDate">December 2003</time>. </dd>
<dd class="break"></dd>
<dt id="RFC3688">[RFC3688]</dt>
        <dd>
<span class="refAuthor">Mealling, M.</span>, <span class="refTitle">"The IETF XML Registry"</span>, <span class="seriesInfo">BCP 81</span>, <span class="seriesInfo">RFC 3688</span>, <span class="seriesInfo">DOI 10.17487/RFC3688</span>, <time datetime="2004-01" class="refDate">January 2004</time>, <span>&lt;<a href="https://www.rfc-editor.org/info/rfc3688">https://www.rfc-editor.org/info/rfc3688</a>&gt;</span>. </dd>
<dd class="break"></dd>
<dt id="RFC7446">[RFC7446]</dt>
        <dd>
<span class="refAuthor">Lee, Y., Ed.</span>, <span class="refAuthor">Bernstein, G., Ed.</span>, <span class="refAuthor">Li, D.</span>, and <span class="refAuthor">W. Imajuku</span>, <span class="refTitle">"Routing and Wavelength Assignment Information Model for Wavelength Switched Optical Networks"</span>, <span class="seriesInfo">RFC 7446</span>, <span class="seriesInfo">DOI 10.17487/RFC7446</span>, <time datetime="2015-02" class="refDate">February 2015</time>, <span>&lt;<a href="https://www.rfc-editor.org/info/rfc7446">https://www.rfc-editor.org/info/rfc7446</a>&gt;</span>. </dd>
<dd class="break"></dd>
<dt id="RFC7581">[RFC7581]</dt>
      <dd>
<span class="refAuthor">Bernstein, G., Ed.</span>, <span class="refAuthor">Lee, Y., Ed.</span>, <span class="refAuthor">Li, D.</span>, <span class="refAuthor">Imajuku, W.</span>, and <span class="refAuthor">J. Han</span>, <span class="refTitle">"Routing and Wavelength Assignment Information Encoding for Wavelength Switched Optical Networks"</span>, <span class="seriesInfo">RFC 7581</span>, <span class="seriesInfo">DOI 10.17487/RFC7581</span>, <time datetime="2015-06" class="refDate">June 2015</time>, <span>&lt;<a href="https://www.rfc-editor.org/info/rfc7581">https://www.rfc-editor.org/info/rfc7581</a>&gt;</span>. </dd>
<dd class="break"></dd>
</dl>
</section>
</section>
<section id="appendix-A">
      <h2 id="name-acknowledgements">
<a href="#name-acknowledgements" class="section-name selfRef">Acknowledgements</a>
      </h2>
<p id="appendix-A-1">
    The authors and the working group give their sincere thanks to <span class="contact-name">Robert Wilton</span> for the YANG doctor review and <span class="contact-name">Tom Petch</span> for his comments during the model and document development.<a href="#appendix-A-1" class="pilcrow">¶</a></p>
</section>
<div id="Contributor">
<section id="appendix-B">
      <h2 id="name-contributors">
<a href="#name-contributors" class="section-name selfRef">Contributors</a>
      </h2>
<address class="vcard">
        <div dir="auto" class="left"><span class="fn nameRole">Dhruv Dhody</span></div>
<div dir="auto" class="left"><span class="org">Huawei</span></div>
<div class="email">
<span>Email:</span>
<a href="mailto:dhruv.ietf@gmail.com" class="email">dhruv.ietf@gmail.com</a>
</div>
</address>
<address class="vcard">
        <div dir="auto" class="left"><span class="fn nameRole">Bin Yeong Yoon</span></div>
<div dir="auto" class="left"><span class="org">ETRI</span></div>
<div class="email">
<span>Email:</span>
<a href="mailto:byyun@etri.re.kr" class="email">byyun@etri.re.kr</a>
</div>
</address>
<address class="vcard">
        <div dir="auto" class="left"><span class="fn nameRole">Ricard Vilalta</span></div>
<div dir="auto" class="left"><span class="org">CTTC</span></div>
<div class="email">
<span>Email:</span>
<a href="mailto:ricard.vilalta@cttc.es" class="email">ricard.vilalta@cttc.es</a>
</div>
</address>
<address class="vcard">
        <div dir="auto" class="left"><span class="fn nameRole">Italo Busi</span></div>
<div dir="auto" class="left"><span class="org">Huawei</span></div>
<div class="email">
<span>Email:</span>
<a href="mailto:Italo.Busi@huawei.com" class="email">Italo.Busi@huawei.com</a>
</div>
</address>
</section>
</div>
<div id="authors-addresses">
<section id="appendix-C">
      <h2 id="name-authors-addresses">
<a href="#name-authors-addresses" class="section-name selfRef">Authors' Addresses</a>
      </h2>
<address class="vcard">
        <div class="ascii">
<div dir="auto" class="left"><span class="fn nameRole">Haomian Zheng</span></div>
<div dir="auto" class="left"><span class="org">Huawei Technologies</span></div>
<div dir="auto" class="left"><span class="street-address">H1, Huawei Xiliu Beipo Village, Songshan Lake</span></div>
<div dir="auto" class="left"><span class="locality">Dongguan</span></div>
<div dir="auto" class="left">
<span class="region">Guangdong</span>, <span class="postal-code">523808</span>
</div>
<div dir="auto" class="left"><span class="country-name">China</span></div>
<div class="email">
<span>Email:</span>
<a href="mailto:zhenghaomian@huawei.com" class="email">zhenghaomian@huawei.com</a>
</div>
</div>
<div class="alternative-contact">Additional contact information:</div>
<div class="non-ascii">
<div dir="auto" class="left"><span class="fn nameRole">郑好棉</span></div>
<div dir="auto" class="left"><span class="country-name">中国</span></div>
<div dir="auto" class="left"><span class="postal-code">523808</span></div>
<div dir="auto" class="left">
<span class="region">广东</span> <span class="locality">东莞</span> </div>
<div dir="auto" class="left"><span class="street-address">松山湖华为溪流背坡村H1</span></div>
<div dir="auto" class="left"><span class="org">华为技术有限公司</span></div>
</div>
</address>
<address class="vcard">
        <div dir="auto" class="left"><span class="fn nameRole">Young Lee</span></div>
<div dir="auto" class="left"><span class="org">Samsung</span></div>
<div dir="auto" class="left"><span class="country-name">South Korea</span></div>
<div class="email">
<span>Email:</span>
<a href="mailto:younglee.tx@gmail.com" class="email">younglee.tx@gmail.com</a>
</div>
</address>
<address class="vcard">
        <div dir="auto" class="left"><span class="fn nameRole">Aihua Guo</span></div>
<div dir="auto" class="left"><span class="org">Futurewei</span></div>
<div class="email">
<span>Email:</span>
<a href="mailto:aihuaguo.ietf@gmail.com" class="email">aihuaguo.ietf@gmail.com</a>
</div>
</address>
<address class="vcard">
        <div dir="auto" class="left"><span class="fn nameRole">Victor Lopez</span></div>
<div dir="auto" class="left"><span class="org">Nokia</span></div>
<div class="email">
<span>Email:</span>
<a href="mailto:victor.lopez@nokia.com" class="email">victor.lopez@nokia.com</a>
</div>
</address>
<address class="vcard">
        <div dir="auto" class="left"><span class="fn nameRole">Daniel King</span></div>
<div dir="auto" class="left"><span class="org">University of Lancaster</span></div>
<div class="email">
<span>Email:</span>
<a href="mailto:d.king@lancaster.ac.uk" class="email">d.king@lancaster.ac.uk</a>
</div>
</address>
</section>
</div>
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