module huawei-igp {

    yang-version 1;

    namespace "urn:huawei:yang:huawei-igp";

    prefix igp;

    import huawei-mpls-te {
      prefix mpls-te;
    }
    import huawei-tunnel-management {
      prefix tnlm;
    }
    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 "IGP management.";

    revision "2020-03-13" {
      description
        "Modify the format specification.";
      reference
        "Huawei private.";

    }

    revision "2020-02-03" {
      description
        "Reconstructing Yang file by yin mechanism.";
      reference
        "Huawei private.";

    }

    revision "2019-04-04" {
      description "Initial revision.";
      reference
        "Huawei private.";

    }

    ext:task-name "mpls-te";

    typedef shortcut-mode {
      type enumeration {
        enum "disable" {
          value 0;
          description
            "The IGP shortcut function is disabled.";
        }
        enum "isis" {
          value 1;
          description
            "To enable the IGP shortcut mode as ISIS.";
        }
        enum "ospf" {
          value 2;
          description
            "To enable the IGP shortcut mode as OSPF.";
        }
        enum "both" {
          value 3;
          description
            "To enable the IGP shortcut mode as both.";
        }
      }
      description
        "Interface IGP short cut mode.";
    }

    augment /ifm:ifm/ifm:interfaces/ifm:interface/tnlm:tunnel-protocol/tnlm:type/mpls-te:mpls-te/mpls-te:te-tunnel {
      description "IGP augment to MPLS TE.";
      container igp-attr {
        when
          "../mpls-te:common-attributes/mpls-te:signal-protocol!='cr-static'";
        description
          "Configure IGP attribute of tunnel interface.";
        leaf adv-enable {
          type boolean;
          must
            "../adv-enable='false' or (../../mpls-te:common-attributes/mpls-te:signal-protocol!='segment-routing' and ../shortcut-type!='ospf' and ../shortcut-type!='isis')";
          default "false";
          description
            "Enable/disable tunnel interface forwarding adjacency based on tunnel interfaces. An MPLE TE tunnel can be advertised as a virtual link over an IGP network. The virtual link can participate in route calculation.";
        }

        leaf adv-ipv6-enable {
          type boolean;
          must
            "../adv-ipv6-enable='false' or ../adv-enable='true'";
          default "false";
          description
            "Enable/disable tunnel interface forwarding adjacency IPv6 based on tunnel interfaces. An MPLE TE tunnel can be advertised as a virtual link over an IGP network. The virtual link can participate in route calculation.";
        }

        leaf hold-time {
          type uint32 {
            range "0..4294967295";
          }
          units "ms";
          must
            "../hold-time=0 or ../adv-enable='true' or ../shortcut-type='isis'";
          default "0";
          description
            "When tunnel get down, the time of notifying tunnel as virtual link to other routers.";
        }

        leaf shortcut-type {
          type shortcut-mode;
          must
            "../shortcut-type='disable' or ../adv-enable!='true'";
          default "disable";
          description
            "Tunnel interface shortcut types.";
        }

        choice metric-type {
          description
            "IGP metric types of tunnel interfaces. Relative metric type and absolute metric type.";
          case relative {
            description
              "IGP relative metric value of a tunnel interface.";
            leaf relative {
              type int32 {
                range "-10..10";
              }
              description
                "IGP relative metric value of a tunnel interface.";
            }
          }  // case relative

          case absolute {
            description
              "IGP absolute metric value of a tunnel interface.";
            leaf absolute {
              type int32 {
                range "1..65535";
              }
              description
                "IGP absolute metric value of a tunnel interface.";
            }
          }  // case absolute
        }  // choice metric-type
      }  // container igp-attr
    }
  }  // module huawei-igp