module ieee802-dot1q-lldp-cn-tlv {

    yang-version 1.1;

    namespace
      'urn:ieee:std:802.1Q:yang:ieee802-dot1q-lldp-cn-tlv';

    prefix lldp-cn-tlv;

    import ieee802-dot1ab-lldp {
      prefix lldp;
    }

    organization
      "Institute of Electrical and Electronics Engineers";

    contact
      "WG-URL: http://ieee802.org/1/
     WG-EMail: stds-802-1-l@ieee.org
     Contact: IEEE 802.1 Working Group Chair
     Postal: C/O IEEE 802.1 Working Group
     IEEE Standards Association
          445 Hoes Lane
          Piscataway, NJ 08854
          USA
    
     E-mail: stds-802-1-chairs@ieee.org";

    description
      "IEEE Std 802.1Q extension tlvs for LLDP";

    revision "2021-03-02" {
      description
        "LLDP extension tlv for congestion notification. Published as part
      of IEEE Std 802.1Qcz-2021. Initial version.";
      reference
        "IEEE Std 802.1Qcz-2021 Annex D";

    }


    grouping congestion-notification-tlv {
      description
        "Congestion Notification TLV";
      reference
        "IEEE Std 802.1Q-2018 Annex D.2.7";

      typedef congestion-notification-bit-vector {
        type bits {
          bit priority0 {
            position 0;
            description
              "status for priority0, 0 is FALSE, 1 is TRUE";
          }
          bit priority1 {
            position 1;
            description
              "status for priority1, 0 is FALSE, 1 is TRUE";
          }
          bit priority2 {
            position 2;
            description
              "status for priority2, 0 is FALSE, 1 is TRUE";
          }
          bit priority3 {
            position 3;
            description
              "status for priority3, 0 is FALSE, 1 is TRUE";
          }
          bit priority4 {
            position 4;
            description
              "status for priority4, 0 is FALSE, 1 is TRUE";
          }
          bit priority5 {
            position 5;
            description
              "status for priority5, 0 is FALSE, 1 is TRUE";
          }
          bit priority6 {
            position 6;
            description
              "status for priority6, 0 is FALSE, 1 is TRUE";
          }
          bit priority7 {
            position 7;
            description
              "status for priority7, 0 is FALSE, 1 is TRUE";
          }
        }
        description
          "Describes a bit vector used in Congestion Notification Objects";
        reference
          "IEEE 802.1Q-2018 Clause 32.4.7 and Clause 32.4.8";

      }
      leaf per-priority-xmit-cnpv-capable {
        type congestion-notification-bit-vector;
        description
          "Indicates if a priority on this Port is operating as a CNPV";
        reference
          "IEEE Std 802.1Q-2018 Annex D.2.7.3 and Clause 32.4.7";

      }

      leaf per-priority-xmit-ready {
        type congestion-notification-bit-vector;
        description
          "Indicates if the priority remap defenses for this Port and CNPV
        have been disabled";
        reference
          "IEEE Std 802.1Q-2018 Annex D.2.7.4 and Clause 32.4.8";

      }
    }  // grouping congestion-notification-tlv

    augment /lldp:lldp/lldp:port {
      description
        "Augments port with the congestion notfication extension tlv";
      leaf tlvs-tx-org-congestion-notification-enable {
        type boolean;
        description
          "Leaf that indicates if congestion notification tlv is enabled
        from Table D.1 of 802.1Q-2018";
        reference
          "IEEE Std 802.1Q-2018 Annex D.2";

      }

      container congestion-notification-tlv-extension {
        description
          "The Congesiton Notification TLV";
        uses congestion-notification-tlv;
      }  // container congestion-notification-tlv-extension
    }

    augment /lldp:lldp/lldp:port/lldp:remote-systems-data {
      description
        "Augments port remote-systems-data with received cn extension tlvs";
      container congestion-notification-tlv-extension {
        description
          "Holds a received Congesiton Notification TLV";
        uses congestion-notification-tlv;
      }  // container congestion-notification-tlv-extension
    }
  }  // module ieee802-dot1q-lldp-cn-tlv