submodule huawei-dhcpv6-relay {

    yang-version 1;

    belongs-to huawei-dhcpv6 {
        prefix dhcpv6;
    }

    import ietf-inet-types {
      prefix inet;
    }
    import huawei-ifm {
      prefix ifm;
    }
    import huawei-network-instance {
      prefix ni;
    }
    import huawei-pub-type {
      prefix pub-type;
    }
    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
      "This module contains a collection of YANG definitions for managing DHCPv6 relay.";

    revision "2020-03-09" {
      description "Modify description.";
      reference
        "Huawei private.";

    }

    revision "2019-12-16" {
      description "Initial revision.";
      reference
        "Huawei private.";

    }


    typedef rapid-commit-flag-type {
      type enumeration {
        enum "off" {
          value 0;
          description
            "Disable rapid commit.";
        }
        enum "on" {
          value 1;
          description "Enable rapid commit.";
        }
      }
      description
        "The type of rapid commit flag.";
    }

    typedef relay-table-status {
      type enumeration {
        enum "init" {
          value 0;
          description "Init status.";
        }
        enum "solicit" {
          value 1;
          description
            "Send solicit packet to server.";
        }
        enum "advertise" {
          value 2;
          description
            "Send Advertise packet to client.";
        }
        enum "request" {
          value 3;
          description
            "Send request packet to server.";
        }
        enum "renewrebind" {
          value 4;
          description
            "Send renew or rebind packet to server.";
        }
        enum "confirm" {
          value 5;
          description
            "Send confirm packet to server.";
        }
        enum "decline" {
          value 6;
          description
            "Send decline packet to server.";
        }
        enum "release" {
          value 7;
          description
            "Send release packet to server.";
        }
        enum "up" {
          value 8;
          description "Stable status.";
        }
        enum "error" {
          value 9;
          description "Error status.";
        }
      }
      description
        "The type of relay table status.";
    }

    typedef ia-type {
      type enumeration {
        enum "iainvalid" {
          value 0;
          description
            "Invalid identity association.";
        }
        enum "iana" {
          value 1;
          description
            "Identity association for non-temporary addresses.";
        }
        enum "iata" {
          value 2;
          description
            "Identity association for temporary addresses.";
        }
        enum "iapd" {
          value 3;
          description
            "Identity association for prefix delegation.";
        }
      }
      description
        "The type of identity association.";
    }

    typedef relay-file-authentication-mode {
      type enumeration {
        enum "check" {
          value 0;
          description "Check.";
        }
        enum "no-check" {
          value 1;
          description "No-check.";
        }
        enum "force-check" {
          value 2;
          description "Force-check.";
        }
      }
      description
        "The type of file authentication mode.";
    }
  }  // submodule huawei-dhcpv6-relay