module huawei-ifm-hdlc {

    yang-version 1;

    namespace
      "urn:huawei:yang:huawei-ifm-hdlc";

    prefix ifm-hdlc;

    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
      "High-level data link control protocol.";

    revision "2019-12-22" {
      description "Initial revision.";
      reference
        "Huawei private.";

    }

    ext:task-name "hdlc";

    typedef damp-level {
      type enumeration {
        enum "light" {
          value 0;
          description "Light weight.";
        }
        enum "middle" {
          value 1;
          description "Middle weight.";
        }
        enum "heavy" {
          value 2;
          description "Heavy weight.";
        }
        enum "manual" {
          value 3;
          description
            "Manually configure the parameters.";
        }
      }
      description "HDLC damp level.";
    }

    augment /ifm:ifm {
      description
        "Configure extend interface attributes.";
      container hdlc-damp {
        description
          "Configure HDLC link status damping, the suppress value must be less than the value of reuse x (2 to the power of (max-suppress-time/half-lifeperiod)).";
        leaf enable {
          type boolean;
          default "true";
          description
            "Enable/disable the HDLC link status damping.";
        }

        leaf damp-level {
          when "../enable='true'";
          type damp-level;
          must
            "(../damp-level='manual' and ../suppress and ../reuse and ../max-suppress-time and ../half-lifeperiod) or (../damp-level!='manual')";
          default "light";
          description
            "HDLC link status damping level.";
        }

        leaf suppress {
          when
            "../enable='true' and ../damp-level='manual'";
          type uint32 {
            range "2..20000";
          }
          units "s";
          must "../suppress>../reuse";
          description
            "1000 times of suppress threshold.";
        }

        leaf reuse {
          when
            "../enable='true' and ../damp-level='manual'";
          type uint32 {
            range "1..19999";
          }
          units "s";
          must "../suppress>../reuse";
          description
            "1000 times of reuse threshold.";
        }

        leaf max-suppress-time {
          when
            "../enable='true' and ../damp-level='manual'";
          type uint16 {
            range "1..255";
          }
          units "s";
          description "Max suppress time.";
        }

        leaf half-lifeperiod {
          when
            "../enable='true' and ../damp-level='manual'";
          type uint16 {
            range "1..60";
          }
          units "s";
          description
            "HDLC protocol status damping half life time.";
        }
      }  // container hdlc-damp
    }
  }  // module huawei-ifm-hdlc