module fujitsu-ppp-interface {

    yang-version 1;

    namespace
      "urn:fujitsu:params:xml:ns:yang:interface:ppp";

    prefix ppp;

    import ietf-interfaces {
      prefix if;
    }
    import fujitsu-entity-states {
      prefix entity-states;
    }

    organization "Fujitsu Ltd.";

    contact
      "Fujitsu Ltd.
     
     Address: 2801 Telecom Parkway
              Richardson, Texas 75082
     
     Tel: +1-800-USE-FTAC (1-800-873-3822)
     Email: ftac@fnc.fujitsu.com
     Author: Abinder S Dhillon
     Web: www.fujitsu.com/us/services/telecom";

    description
      "This module contains YANG definitions 
     for the PPP Interfaces. 
     
     Copyright (c) 2015 Fujitsu Ltd.
     All rights reserved. ";

    revision "2019-02-07" {
      description
        "Move MRU default to annotation.";
    }

    revision "2017-05-08" {
      description "Add PPP sync leaf.";
    }

    revision "2016-01-11" {
      description "Initial revision.";
    }


    grouping ppp-attributes {
      description
        "Point to Point (PPP)  attributes";
      leaf restartTimer {
        type uint32;
        must ". = 3" {
          error-message
            "restartTimer must be 3.";
        }
        default "3";
        description
          " Restart Timer timer is used to time transmissions of
          Configure-Request and Terminate-Request packets.
          Expiration of the Restart timer causes a Timeout event,
          and retransmission of the corresponding Configure-Request
          or Terminate-Request packet.
          default: 3 seconds
          Standards allow this configurable but we only support
          3 seconds";
      }

      leaf MRU {
        type uint32 {
          range "128..16384";
        }
        description
          " PPP Maximum Receive Unit size";
      }

      leaf magicNumber {
        type boolean;
        default "false";
        description
          " If true then the local node will attempt to
          perform Magic Number negotiation with the
          remote node. If false then this negotiation
          is not performed";
      }

      leaf fcsSize {
        type uint32;
        must ". = 16" {
          error-message
            "fcsSize must be 16.";
        }
        default "16";
        description
          " The size of FCS in bits
         Allowed value is only 16
         default : 16 ";
      }

      leaf sync {
        type boolean;
        default "false";
        description
          "Enable/disable HDLC serial encoding rule.";
      }

      uses entity-states:admin-status {
        refine admin-status {
          default "down";
          mandatory false;
          description
            "PPP port admin status";
        }
      }
    }  // grouping ppp-attributes

    augment /if:interfaces/if:interface {
      container ppp-config {
        when "../if:type = 'ianaift:ppp'";
        description "PPP Interface";
        uses ppp-attributes;
      }  // container ppp-config
    }

    grouping ppp-packet-stats {
      leaf numBytesRx {
        type uint32;
        description
          " Number of Received Bytes";
      }

      leaf numBytesTx {
        type uint32;
        description " Number of Tx Bytes";
      }

      leaf numPduRx {
        type uint32;
        description
          " Number of Received PDus";
      }

      leaf numPduTx {
        type uint32;
        description " Number of Tx PDUs";
      }
    }  // grouping ppp-packet-stats

    augment /if:interfaces-state/if:interface {
      container ppp-if-status {
        when "../if:type = 'ianaift:ppp'";
        description "PPP Interface Status";
        container packet-stats {
          uses ppp-packet-stats {
            description " PPP Link Status";
          }
        }  // container packet-stats
      }  // container ppp-if-status
    }
  }  // module fujitsu-ppp-interface