module Cisco-IOS-XR-um-frequency-synchronization-cfg {

    yang-version 1;

    namespace
      "http://cisco.com/ns/yang/Cisco-IOS-XR-um-frequency-synchronization-cfg";

    prefix
      um-frequency-synchronization-cfg;

    import ietf-yang-types {
      prefix yang;
    }
    import Cisco-IOS-XR-um-interface-cfg {
      prefix a1;
    }
    import Cisco-IOS-XR-um-snmp-server-cfg {
      prefix a2;
    }
    import Cisco-IOS-XR-um-location-cfg {
      prefix location;
    }
    import tailf-common {
      prefix tailf;
    }
    import cisco-semver {
      prefix semver;
    }

    organization "Cisco Systems, Inc.";

    contact
      "Cisco Systems, Inc.
     Customer Service
     
     Postal: 170 West Tasman Drive
     San Jose, CA 95134
     
     Tel: +1 800 553-NETS
     
     E-mail: cs-yang@cisco.com";

    description
      "This module contains a collection of YANG definitions
     for Cisco IOS-XR frequency-synchronization package configuration.
     
     This YANG module augments the
     modules with configuration data.
     
     Copyright (c) 2021 by Cisco Systems, Inc.
     All rights reserved.";

    revision "2021-01-06" {
      description "Initial release";
    }

    semver:module-version "1.0.0";

    container frequency {
      description
        "Frequency Synchronization configuration";
      container synchronization {
        presence
          "Indicates a synchronization node is configured.";
        description
          "Frequency Synchronization configuration";
        container quality {
          description
            "Quality level option selection";
          container itu-t {
            description "ITU-T QL options";
            container option {
              description "ITU-T QL options";
              container one {
                presence
                  "Indicates a one node is configured.";
                description
                  "ITU-T QL option 1";
              }  // container one

              container two {
                description
                  "ITU-T QL option 2";
                container generation {
                  description
                    "ITU-T QL option 2 generation";
                  container one {
                    must
                      "not(../../../../option/one or ../two)";
                    presence
                      "Indicates a one node is configured.";
                    description
                      "ITU-T QL option 2, generation 1";
                  }  // container one

                  container two {
                    must
                      "not(../../../../option/one or ../one)";
                    presence
                      "Indicates a two node is configured.";
                    description
                      "ITU-T QL option 2, generation 2";
                  }  // container two
                }  // container generation
              }  // container two
            }  // container option
          }  // container itu-t
        }  // container quality

        container clock-interface {
          description
            "Clock interface configuration";
          container timing-mode {
            description
              "Clock interface timing mode";
            container system {
              must "not(../independent)";
              presence
                "Indicates a system node is configured.";
              description
                "Use the system's selected timing source for clock-interface output";
            }  // container system

            container independent {
              must "not(../system)";
              presence
                "Indicates a independent node is configured.";
              description
                "Use the line interfaces for clock-interface output, which is not looped back to the clock-interface input";
            }  // container independent
          }  // container timing-mode
        }  // container clock-interface

        container system {
          description
            "System timing configuration";
          container timing-mode {
            description "System timing mode";
            container line-only {
              must "not(../clock-only)";
              presence
                "Indicates a line-only node is configured.";
              description
                "Use only line-interfaces for system timing";
            }  // container line-only

            container clock-only {
              must "not(../line-only)";
              presence
                "Indicates a clock-only node is configured.";
              description
                "Use only clock-interfaces for system timing";
            }  // container clock-only
          }  // container timing-mode
        }  // container system

        container log {
          description "Logging options";
          container selection {
            description
              "Selection logging options";
            container changes {
              must "not(../errors)";
              presence
                "Indicates a changes node is configured.";
              description
                "Log both selection changes and errors";
            }  // container changes

            container errors {
              must "not(../changes)";
              presence
                "Indicates a errors node is configured.";
              description
                "Log selection errors";
            }  // container errors
          }  // container selection
        }  // container log

        container clock-identity {
          description
            "Clock ID configuration";
          leaf mac-address {
            type yang:mac-address;
            description
              "MAC address to use to form the clock ID";
          }
        }  // container clock-identity
      }  // container synchronization
    }  // container frequency
  }  // module Cisco-IOS-XR-um-frequency-synchronization-cfg