module huawei-ppp-net {

    yang-version 1;

    namespace
      "urn:huawei:yang:huawei-ppp-net";

    prefix ppp-net;

    import huawei-ifm {
      prefix ifm;
    }
    import huawei-devm {
      prefix devm;
    }
    import ietf-inet-types {
      prefix inet;
    }
    import huawei-extension {
      prefix ext;
    }
    import huawei-pub-type {
      prefix pub-type;
    }
    import ietf-yang-types {
      prefix yang;
    }

    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 "PPP net.";

    revision "2019-04-11" {
      description "Initial revision.";
      reference
        "Huawei private.";

    }

    ext:task-name "ppp";

    typedef ppp-damp-level-type {
      type enumeration {
        enum "light" {
          value 0;
          description "Light weight.";
        }
        enum "middle" {
          value 1;
          description "Middle weight.";
        }
        enum "heavy" {
          value 2;
          description "Heavy weight.";
        }
        enum "manual" {
          value 3;
          description
            "Manually configure the parameters.";
        }
      }
      description
        "PPP damp level type is light/middle/heavy/manual.";
    }

    typedef ppp-net-mru-negotiation-type {
      type enumeration {
        enum "ipv4" {
          value 0;
          description
            "IPv4 MRU negotiation on PPP MRU.";
        }
        enum "ipv6" {
          value 1;
          description
            "IPv6 MRU negotiation on PPP MRU.";
        }
      }
      description
        "PPP LCP MRU negotiation type.";
    }

    typedef ppp-enable {
      type enumeration {
        enum "disable" {
          value 0;
          description "Disabling.";
        }
        enum "enable" {
          value 1;
          description "Enabling.";
        }
      }
      description
        "Description of enable type.";
    }

    typedef ppp-net-link-type {
      type enumeration {
        enum "lcp" {
          value 0;
          description "LCP.";
        }
        enum "ipcp" {
          value 1;
          description "IPCP.";
        }
      }
      description "Link Type.";
    }

    typedef ppp-net-fsm-state {
      type enumeration {
        enum "initial" {
          value 0;
          description "Initial.";
        }
        enum "starting" {
          value 1;
          description "Starting.";
        }
        enum "closed" {
          value 2;
          description "Closed.";
        }
        enum "stopped" {
          value 3;
          description "Stopped.";
        }
        enum "closing" {
          value 4;
          description "Closing.";
        }
        enum "stopping" {
          value 5;
          description "Stopping.";
        }
        enum "request-sent" {
          value 6;
          description "Request sent.";
        }
        enum "ack-received" {
          value 7;
          description "Ack-received.";
        }
        enum "ack-sent" {
          value 8;
          description "Ack-sent.";
        }
        enum "opened" {
          value 9;
          description "Opened.";
        }
        enum "none" {
          value 10;
          description "None.";
        }
      }
      description "PPP fsm state.";
    }

    typedef mp-fragment-size {
      type enumeration {
        enum "fragment-128" {
          value 0;
          description
            "Fragment size 128 bytes.";
        }
        enum "fragment-256" {
          value 1;
          description
            "Fragment size 256 bytes.";
        }
        enum "fragment-512" {
          value 2;
          description
            "Fragment size 512 bytes.";
        }
        enum "no-fragment" {
          value 3;
          description "No fragment.";
        }
        enum "fragment-64" {
          value 4;
          description
            "Fragment size 64 bytes.";
        }
      }
      description "MP fragment size.";
    }

    typedef mp-member-physical-state {
      type enumeration {
        enum "down" {
          value 0;
          description
            "The interface is in the down state.";
        }
        enum "up" {
          value 1;
          description
            "The interface is in the up state.";
        }
        enum "admin-shutdown" {
          value 2;
          description
            "The interface is in the admin shutdown state.";
        }
      }
      description
        "MP group member physical state.";
    }

    typedef mp-member-protocol-state {
      type enumeration {
        enum "down" {
          value 0;
          description
            "The interface is in the down state.";
        }
        enum "up" {
          value 1;
          description
            "The interface is in the up state.";
        }
        enum "damping" {
          value 2;
          description
            "The interface is in the damping state.";
        }
      }
      description
        "MP group member protocol state.";
    }

    container ppp-net {
      description "PPP net.";
      container ppp-dampening {
        ext:generated-by "system" {
          ext:can-be-deleted;
          description "The PPP dampening whose level is light is generated by system automatically.";
        }
        presence
          "PPP protocol status damping enable.";
        description
          "Enable/disable type of PPP damp. If dampen-level is set to manual, the settings of the other parameters need to meet the following requirement: suppress-value/1000 <= (reuse-value/1000) * 2^ (max-suppress-time/half-life-period).";
        leaf dampen-level {
          type ppp-damp-level-type;
          default "light";
          description
            "PPP protocol status damping level.";
        }

        leaf half-life-period {
          when "../dampen-level='manual'";
          type uint8 {
            range "1..60";
          }
          units "s";
          mandatory true;
          description
            "PPP protocol status damping half life time (seconds)";
        }

        leaf suppress-value {
          when "../dampen-level='manual'";
          type uint16 {
            range "1..20000";
          }
          must
            "../suppress-value >= ../reuse-value";
          mandatory true;
          description
            "1000 times of PPP protocol status damping suppress threshold.";
        }

        leaf reuse-value {
          when "../dampen-level='manual'";
          type uint16 {
            range "1..20000";
          }
          must
            "../suppress-value >= ../reuse-value";
          mandatory true;
          description
            "1000 times of PPP protocol status damping reuse threshold.";
        }

        leaf max-suppress-time {
          when "../dampen-level='manual'";
          type uint8 {
            range "1..255";
          }
          units "s";
          mandatory true;
          description
            "PPP protocol status damping max suppress time.";
        }
      }  // container ppp-dampening

      container load-balance-identify-pppoe {
        description
          "Configure load balance identify PPPoE.";
        leaf load-balance-enable {
          type boolean;
          default "false";
          description
            "Enable/disable a device to identify the IP.";
        }
      }  // container load-balance-identify-pppoe
    }  // container ppp-net
  }  // module huawei-ppp-net