module huawei-evpl-ext {

    yang-version 1;

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

    prefix evpl-ext;

    import huawei-evpl {
      prefix evpl;
    }
    import huawei-qos {
      prefix qos;
    }
    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 "Evpl ext.";

    revision "2020-03-06" {
      description "Add pipe type.";
      reference
        "Huawei private.";

    }

    revision "2019-11-23" {
      description "Initial revision.";
      reference
        "Huawei private.";

    }

    ext:task-name "forwarding";

    typedef evpl-pipe-mode {
      type enumeration {
        enum "pipe" {
          value 1;
          description "Evpl pipe mode.";
        }
        enum "shortpipe" {
          value 2;
          description
            "Evpl short pipe mode.";
        }
        enum "uniform" {
          value 3;
          description "Evpl uniform mode.";
        }
      }
      description "Evpl pipe mode.";
    }

    typedef evpl-service-class {
      type enumeration {
        enum "be" {
          value 0;
          description
            "Specify the CoS as BE.";
        }
        enum "af1" {
          value 1;
          description
            "Specify the CoS as AF1.";
        }
        enum "af2" {
          value 2;
          description
            "Specify the CoS as AF2.";
        }
        enum "af3" {
          value 3;
          description
            "Specify the CoS as AF3.";
        }
        enum "af4" {
          value 4;
          description
            "Specify the CoS as AF4.";
        }
        enum "ef" {
          value 5;
          description
            "Specify the CoS as EF.";
        }
        enum "cs6" {
          value 6;
          description
            "Specify the CoS as CS6.";
        }
        enum "cs7" {
          value 7;
          description
            "Specify the CoS as CS7.";
        }
      }
      description "Description of CoS.";
    }

    typedef evpl-color {
      type enumeration {
        enum "green" {
          value 0;
          description
            "Specify the packet color as green.";
        }
        enum "yellow" {
          value 1;
          description
            "Specify the packet color as yellow.";
        }
        enum "red" {
          value 2;
          description
            "Specify the packet color as red.";
        }
      }
      description
        "Description of packet color.";
    }

    typedef evpl-trust-type {
      type enumeration {
        enum "outpri" {
          value 0;
          description
            "Specify the trust type as OUTTER-VLAN-8021P.";
        }
        enum "inpri" {
          value 1;
          description
            "Specify the trust type as INNER-VLAN-8021P.";
        }
        enum "ipdscp" {
          value 2;
          description
            "Specify the trust type as IP-DSCP.";
        }
      }
      description
        "Description of trust type.";
    }

    augment /evpl:evpl/evpl:instances/evpl:instance {
      description "Evpl configuration.";
      container pipe {
        when
          "(../evpl:mode != 'vxlan-mode')";
        description
          "Configure the diffserv mode of evpl.";
        leaf split-mode {
          type boolean;
          must
            "((../split-mode='false' and not(../ingress-pipe-mode) and not(../egress-pipe-mode) and ../pipe-mode) or (../split-mode='true' and not(../pipe-mode) and ../ingress-pipe-mode and ../egress-pipe-mode and not(../ingress-pipe-mode='uniform' and ../egress-pipe-mode='uniform')))";
          default "false";
          description
            "Enable/disable split mode.";
        }

        leaf pipe-mode {
          when "../split-mode='false'";
          type evpl-pipe-mode;
          must
            "(../split-mode='false') and ((../pipe-mode='pipe' and (../service-class) and (../color)) or (../pipe-mode='shortpipe' and (../service-class) and (../color) and (../domain-name)) or (../pipe-mode='uniform'))";
          default "uniform";
          description "Pipe mode.";
        }

        leaf ingress-pipe-mode {
          when "../split-mode='true'";
          type evpl-pipe-mode;
          must
            "((../split-mode='true') and (((../service-class) and (../color) and (../ingress-pipe-mode='shortpipe' or ../ingress-pipe-mode='pipe')) or (../ingress-pipe-mode='uniform' and ../egress-pipe-mode!='uniform')))";
          default "uniform";
          description "Ingress pipe mode.";
        }

        leaf egress-pipe-mode {
          when "../split-mode='true'";
          type evpl-pipe-mode;
          must
            "((../split-mode='true') and (((../domain-name) and (../trust-type) and (../egress-pipe-mode='shortpipe')) or (../egress-pipe-mode='pipe') or (../egress-pipe-mode='uniform' and ../ingress-pipe-mode!='uniform')))";
          default "uniform";
          description "Egress pipe mode.";
        }

        leaf service-class {
          when
            "(../pipe-mode='pipe' or ../pipe-mode='shortpipe' or ../ingress-pipe-mode='pipe' or ../ingress-pipe-mode='shortpipe')";
          type evpl-service-class;
          must
            "(../pipe-mode='pipe' or ../pipe-mode='shortpipe' or ../ingress-pipe-mode='pipe' or ../ingress-pipe-mode='shortpipe')";
          default "be";
          description "Service class.";
        }

        leaf color {
          when
            "(../pipe-mode='pipe' or ../pipe-mode='shortpipe'  or ../ingress-pipe-mode='pipe' or ../ingress-pipe-mode='shortpipe')";
          type evpl-color;
          must
            "(../pipe-mode='pipe' or ../pipe-mode='shortpipe' or ../ingress-pipe-mode='pipe' or ../ingress-pipe-mode='shortpipe')";
          default "green";
          description "Color.";
        }

        leaf domain-name {
          when
            "(../pipe-mode='shortpipe'  or ../egress-pipe-mode='shortpipe')";
          type leafref {
            path "/qos:qos/qos:classifier-template/qos:diffserv-domains/qos:diffserv-domain/qos:name";
          }
          must
            "(../pipe-mode='shortpipe' or ../egress-pipe-mode='shortpipe')";
          default "default";
          description "Domain name.";
        }

        leaf trust-type {
          when
            "../egress-pipe-mode='shortpipe'";
          type evpl-trust-type;
          must
            "../egress-pipe-mode='shortpipe'";
          default "outpri";
          description "Trust type.";
        }
      }  // container pipe
    }
  }  // module huawei-evpl-ext