module huawei-bfd-ext {

    yang-version 1;

    namespace
      "urn:huawei:yang:huawei-bfd-ext";

    prefix bfd-ext;

    import huawei-bfd {
      prefix bfd;
    }
    import huawei-ifm {
      prefix ifm;
    }
    import huawei-ifm-trunk {
      prefix ifm-trunk;
    }
    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 "Extended BFD functions.";

    revision "2019-10-27" {
      description "Initial revision.";
      reference
        "Huawei private.";

    }

    ext:task-name "bfd";

    augment /ifm:ifm/ifm:interfaces/ifm:interface {
      description
        "Configure BFD on the interface.";
      container bfd-ext {
        description
          "Configure extended BFD functions based on interfaces.";
        leaf transparent-tx-flag {
          type empty;
          must
            "(not(/bfd:bfd/bfd:sessions/bfd:session[bfd:out-if-name-multicast-ipv4 = current()/../../ifm:name])) and (not(/ifm:ifm/ifm:interfaces/ifm:interface/ifm-trunk:trunk/ifm-trunk:members/ifm-trunk:member[ifm-trunk:name = current()/../../ifm:name]))";
          description
            "The flag of default BFD transparent transmission.";
        }
      }  // container bfd-ext
    }
  }  // module huawei-bfd-ext