module huawei-link-heartbeat {

    yang-version 1;

    namespace
      "urn:huawei:yang:huawei-link-heartbeat";

    prefix link-heartbeat;

    import huawei-ifm {
      prefix ifm;
    }
    import huawei-extension {
      prefix ext;
    }

    organization
      "Huawei Technologies Co., Ltd.";

    contact
      "Huawei Industrial Base
     Bantian, Longgang
     Shenzhen 518129
     People's Republic of China
     Website: http://www.huawei.com
     Email: support@huawei.com";

    description
      "Link-heartbeat is the way of detecting the link quality by sending heart packets between two devices.";

    revision "2020-04-22" {
      description "Initial revision.";
      reference
        "Huawei private.";

    }

    ext:task-name "forwarding";

    typedef state {
      type enumeration {
        enum "init" {
          value 0;
          description
            "Indicates that link-heartbeat status is initial.";
        }
        enum "normal" {
          value 1;
          description
            "Indicates that link-heartbeat status is normal.";
        }
        enum "approach" {
          value 2;
          description
            "Indicates that link-heartbeat status is approach.";
        }
        enum "diagnose" {
          value 3;
          description
            "Indicates that link-heartbeat status is diagnose.";
        }
      }
      description
        "Link-heartbeat state type.";
    }

    typedef state-flag {
      type enumeration {
        enum "normal" {
          value 0;
          description
            "Indicates that link-heartbeat state is normal.";
        }
        enum "alarm" {
          value 1;
          description
            "Indicates that link-heartbeat state is alarm.";
        }
      }
      description
        "Link-heartbeat state flag type.";
    }

    typedef port-ready {
      type enumeration {
        enum "not-ready" {
          value 0;
          description
            "A port is not ready to send packets.";
        }
        enum "ready" {
          value 1;
          description
            "A port is ready to send packets.";
        }
      }
      description
        "Link-heartbeat state flag type.";
    }

    container link-heartbeat {
      config false;
      description
        "Link-heartbeat is the way of detecting the link quality by sending heart packets between two devices.";
      container interfaces {
        description
          "List of the link-heartbeat query on the local interface.";
        list interface {
          key "if-name";
          description
            "Operational data of the link-heartbeat query on the local interface.";
          leaf if-name {
            type leafref {
              path "/ifm:ifm/ifm:interfaces/ifm:interface/ifm:name";
            }
            description
              "Specifies the name of the interface enabled with link-heartbeat.";
          }

          leaf member-if-name {
            when
              "/ifm:ifm/ifm:interfaces/ifm:interface[ifm:name = current()/../if-name]/ifm:type = 'Eth-Trunk' or
                /ifm:ifm/ifm:interfaces/ifm:interface[ifm:name = current()/../if-name]/ifm:type = 'Ip-Trunk'";
            type leafref {
              path "/ifm:ifm/ifm:interfaces/ifm:interface/ifm:name";
            }
            description
              "Indicates the sending packet interface name for link-heartbeat.";
          }

          leaf detect-status {
            type state;
            description
              "Indicates the link-heartbeat detect status.";
          }

          leaf send-packet-num {
            type uint16;
            units "packet";
            description
              "Indicates the send number of packets.";
          }

          leaf rcv-packet-num {
            type uint16;
            units "packet";
            description
              "Indicates the receive number of packets.";
          }

          leaf loss-alarm {
            type state-flag;
            description
              "Indicates whether the alarm of loss packets occurs.";
          }

          leaf modify-alarm {
            type state-flag;
            description
              "Indicates whether the alarm of modify packets occurs.";
          }

          leaf port-ready {
            type port-ready;
            description
              "Whether a port is ready to send packets.";
          }

          leaf port-ready-reason {
            type string {
              length "1..100";
            }
            description
              "Indicates the reason of a port is ready or not ready.";
          }
        }  // list interface
      }  // container interfaces
    }  // container link-heartbeat
  }  // module huawei-link-heartbeat