module huawei-l3vpn-mpls {

    yang-version 1;

    namespace
      "urn:huawei:yang:huawei-l3vpn-mpls";

    prefix l3vpn-mpls;

    import huawei-extension {
      prefix ext;
    }
    import huawei-network-instance {
      prefix ni;
    }
    import huawei-routing {
      prefix rt;
    }
    import huawei-l3vpn {
      prefix l3vpn;
    }
    import ietf-inet-types {
      prefix inet;
    }

    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 YANG module contains structural data definitions for L3VPN label tack information.";

    revision "2019-04-27" {
      description "Initial revision.";
      reference
        "Huawei private.";

    }

    ext:task-name "l3vpn";

    grouping l3vpn-label-stacks-type {
      description "Label stack information.";
      leaf stack {
        type uint32 {
          range "1..4294967295";
        }
        description "Label stack.";
      }

      leaf level {
        type uint32 {
          range "1..4294967295";
        }
        description "Level.";
      }

      leaf out-interface {
        type string {
          length "1..63";
        }
        description
          "Outbound interface name.";
      }

      leaf type {
        type string {
          length "0..50";
        }
        description "Label Type.";
      }

      leaf label {
        type string {
          length "0..15";
        }
        description "Label.";
      }
    }  // grouping l3vpn-label-stacks-type

    grouping base-route-key-type {
      description
        "Base route key information.";
      leaf prefix {
        type inet:ip-address-no-zone;
        description
          "Destination IP address.";
      }

      leaf mask-length {
        type uint8 {
          range "0..32";
        }
        description
          "Mask length of an IP address.";
      }
    }  // grouping base-route-key-type

    augment /ni:network-instance/ni:instances/ni:instance/l3vpn:afs/l3vpn:af/rt:routing/rt:routing-manage/rt:topologys/rt:topology/rt:routes {
      description "Label stack information.";
      container ipv4-vpn-label-stacks {
        config false;
        description
          "Label stack information.";
        list ipv4-vpn-label-stack {
          key "prefix mask-length stack level out-interface";
          description
            "Label stack information.";
          uses base-route-key-type;

          uses l3vpn-label-stacks-type;
        }  // list ipv4-vpn-label-stack
      }  // container ipv4-vpn-label-stacks
    }
  }  // module huawei-l3vpn-mpls