module openconfig-if-ethernet {

  yang-version "1";

  // namespace
  namespace "http://openconfig.net/yang/interfaces/ethernet";

  prefix "oc-eth";

  // import some basic types
  import openconfig-interfaces { prefix oc-if; }
  import iana-if-type { prefix ianaift; }
  import openconfig-yang-types { prefix oc-yang; }
  import openconfig-extensions { prefix oc-ext; }

  // meta
  organization "OpenConfig working group";

  contact
    "OpenConfig working group
    netopenconfig@googlegroups.com";

  description
    "Model for managing Ethernet interfaces -- augments the OpenConfig
    model for interface configuration and state.";

  oc-ext:openconfig-version "2.11.0";

  revision "2021-06-09" {
    description
      "Add support for standalone link training.";
    reference "2.11.0";
  }

  revision "2021-05-17" {
    description
      "Add ethernet counters: in-carrier-errors,
      in-interrupted-tx, in-late-collision, in-mac-errors-rx,
      in-single-collision, in-symbol-error and out-mac-errors-tx";
    reference "2.10.0";
  }

  revision "2021-03-30" {
    description
      "Add counter for drops due to oversized frames.";
    reference "2.9.0";
  }

  revision "2020-05-06" {
    description
      "Minor formatting fix.";
    reference "2.8.1";
  }

  revision "2020-05-06" {
    description
      "Add 200G, 400G, 600G and 800G Ethernet speeds.";
    reference "2.8.0";
  }

  revision "2020-05-05" {
    description
      "Fix when statement checks to use rw paths when
      from a rw context.";
    reference "2.7.3";
  }

  revision "2019-04-16" {
    description
      "Update import prefix for iana-if-type module";
    reference "2.7.2";
  }

  revision "2018-11-21" {
    description
      "Add OpenConfig module metadata extensions.";
    reference "2.6.2";
  }

  revision "2018-09-04" {
    description
      "Remove in-crc-align-errors as it is a duplicate of
      in-crc-errors";
    reference "2.6.1";
  }

  revision "2018-08-28" {
    description
      "Add Ethernet counter in-block-errors";
    reference "2.6.0";
  }

  revision "2018-07-02" {
    description
      "Add new ethernet counters of in-undersize-frames,
      in-crc-align-errors and the distribution container";
    reference "2.5.0";
  }

  revision "2018-04-10" {
    description
      "Add identities for 2.5 and 5 Gbps.";
    reference "2.4.0";
  }

  revision "2018-01-05" {
    description
      "Add logical loopback to interface.";
    reference "2.3.0";
  }

  revision "2017-12-21" {
    description
      "Added IPv6 router advertisement configuration.";
    reference "2.1.0";
  }

  revision "2017-07-14" {
    description
      "Added Ethernet/IP state data; Add dhcp-client;
      migrate to OpenConfig types modules; Removed or
      renamed opstate values";
    reference "2.0.0";
  }

  revision "2016-12-22" {
    description
      "Fixes to Ethernet interfaces model";
    reference "1.1.0";
  }

  // OpenConfig specific extensions for module metadata.
  oc-ext:regexp-posix;
  oc-ext:catalog-organization "openconfig";
  oc-ext:origin "openconfig";

  // identity statements

  identity ETHERNET_SPEED {
    description "base type to specify available Ethernet link
    speeds";
  }

  identity SPEED_10MB {
    base ETHERNET_SPEED;
    description "10 Mbps Ethernet";
  }

  identity SPEED_100MB {
    base ETHERNET_SPEED;
    description "100 Mbps Ethernet";
  }

  identity SPEED_1GB {
    base ETHERNET_SPEED;
    description "1 Gbps Ethernet";
  }

  identity SPEED_2500MB {
    base ETHERNET_SPEED;
    description "2.5 Gbps Ethernet";
  }

  identity SPEED_5GB {
    base ETHERNET_SPEED;
    description "5 Gbps Ethernet";
  }

  identity SPEED_10GB {
    base ETHERNET_SPEED;
    description "10 Gbps Ethernet";
  }

  identity SPEED_25GB {
    base ETHERNET_SPEED;
    description "25 Gbps Ethernet";
  }

  identity SPEED_40GB {
    base ETHERNET_SPEED;
    description "40 Gbps Ethernet";
  }

  identity SPEED_50GB {
    base ETHERNET_SPEED;
    description "50 Gbps Ethernet";
  }

  identity SPEED_100GB {
    base ETHERNET_SPEED;
    description "100 Gbps Ethernet";
  }

  identity SPEED_200GB {
    base ETHERNET_SPEED;
    description "200 Gbps Ethernet";
  }

  identity SPEED_400GB {
    base ETHERNET_SPEED;
    description "400 Gbps Ethernet";
  }

  identity SPEED_600GB {
    base ETHERNET_SPEED;
    description "600 Gbps Ethernet";
  }

  identity SPEED_800GB {
    base ETHERNET_SPEED;
    description "800 Gbps Ethernet";
  }

  identity SPEED_UNKNOWN {
    base ETHERNET_SPEED;
    description
      "Interface speed is unknown.  Systems may report
      speed UNKNOWN when an interface is down or unpopuplated (e.g.,
      pluggable not present).";
  }

  // typedef statements


  // grouping statements

  grouping ethernet-interface-config {
    description "Configuration items for Ethernet interfaces";

    leaf mac-address {
      type oc-yang:mac-address;
      description
        "Assigns a MAC address to the Ethernet interface.  If not
        specified, the corresponding operational state leaf is
        expected to show the system-assigned MAC address.";
    }

    leaf auto-negotiate {
      type boolean;
      default true;
      description
        "Set to TRUE to request the interface to auto-negotiate
        transmission parameters with its peer interface.  When
        set to FALSE, the transmission parameters are specified
        manually.";
      reference
        "IEEE 802.3-2012 auto-negotiation transmission parameters";
    }

    leaf standalone-link-training {
      type boolean;
      default false;
      description
        "Link training is automatic tuning of the SerDes transmit and
        receive parameters to ensure an optimal connection over copper
        links. It is normally run as part of the auto negotiation
        sequence as specified in IEEE 802.3 Clause 73.

        Standalone link training is used when full auto negotiation is
        not desired on an Ethernet link but link training is needed.
        It is configured by setting the standalone-link-training leaf
        to TRUE and augo-negotiate leaf to FALSE.

        Note: If auto-negotiate is true, then the value of standalone
        link training leaf will be ignored.";
    }

    leaf duplex-mode {
      type enumeration {
        enum FULL {
          description "Full duplex mode";
        }
        enum HALF {
          description "Half duplex mode";
        }
      }
      description
        "When auto-negotiate is TRUE, this optionally sets the
        duplex mode that will be advertised to the peer.  If
        unspecified, the interface should negotiate the duplex mode
        directly (typically full-duplex).  When auto-negotiate is
        FALSE, this sets the duplex mode on the interface directly.";
    }

    leaf port-speed {
      type identityref {
        base ETHERNET_SPEED;
      }
      description
        "When auto-negotiate is TRUE, this optionally sets the
        port-speed mode that will be advertised to the peer for
        negotiation.  If unspecified, it is expected that the
        interface will select the highest speed available based on
        negotiation.  When auto-negotiate is set to FALSE, sets the
        link speed to a fixed value -- supported values are defined
        by ETHERNET_SPEED identities";
    }

    leaf enable-flow-control {
      type boolean;
      default false;
      description
        "Enable or disable flow control for this interface.
        Ethernet flow control is a mechanism by which a receiver
        may send PAUSE frames to a sender to stop transmission for
        a specified time.

        This setting should override auto-negotiated flow control
        settings.  If left unspecified, and auto-negotiate is TRUE,
        flow control mode is negotiated with the peer interface.";
      reference
        "IEEE 802.3x";
    }
  }

  grouping ethernet-interface-state-counters {
    description
      "Ethernet-specific counters and statistics";

    // ingress counters

    leaf in-mac-control-frames {
      type oc-yang:counter64;
      description
        "MAC layer control frames received on the interface";
    }

    leaf in-mac-pause-frames {
      type oc-yang:counter64;
      description
        "MAC layer PAUSE frames received on the interface";
    }

    leaf in-oversize-frames {
      type oc-yang:counter64;
      description
        "The total number of frames received that were
        longer than 1518 octets (excluding framing bits,
        but including FCS octets) and were otherwise
        well formed.";
    }

    leaf in-undersize-frames {
      type oc-yang:counter64;
      description
        "The total number of frames received that were
        less than 64 octets long (excluding framing bits,
        but including FCS octets) and were otherwise well
        formed.";
      reference
        "RFC 2819: Remote Network Monitoring MIB -
        etherStatsUndersizePkts";
    }

    leaf in-jabber-frames {
      type oc-yang:counter64;
      description
        "Number of jabber frames received on the
        interface.  Jabber frames are typically defined as oversize
        frames which also have a bad CRC.  Implementations may use
        slightly different definitions of what constitutes a jabber
        frame.  Often indicative of a NIC hardware problem.";
    }

    leaf in-fragment-frames {
      type oc-yang:counter64;
      description
        "The total number of frames received that were less than
        64 octets in length (excluding framing bits but including
        FCS octets) and had either a bad Frame Check Sequence
        (FCS) with an integral number of octets (FCS Error) or a
        bad FCS with a non-integral number of octets (Alignment
        Error).";
    }

    leaf in-8021q-frames {
      type oc-yang:counter64;
      description
        "Number of 802.1q tagged frames received on the interface";
    }

    leaf in-crc-errors {
      type oc-yang:counter64;
      description
        "The total number of frames received that
        had a length (excluding framing bits, but
        including FCS octets) of between 64 and 1518
        octets, inclusive, but had either a bad
        Frame Check Sequence (FCS) with an integral
        number of octets (FCS Error) or a bad FCS with
        a non-integral number of octets (Alignment Error)";
      reference
        "RFC 2819: Remote Network Monitoring MIB -
        etherStatsCRCAlignErrors";
    }

    leaf in-block-errors {
      type oc-yang:counter64;
      description
        "The number of received errored blocks. Error detection codes
        are capable of detecting whether one or more errors have
        occurred in a given sequence of bits – the block. It is
        normally not possible to determine the exact number of errored
        bits within the block";
    }

    leaf in-carrier-errors {
      type oc-yang:counter64;
      description
        "The number of received errored frames due to a carrier issue.
        The value refers to MIB counter for
        dot3StatsCarrierSenseErrors
        oid=1.3.6.1.2.1.10.7.2.1.11";
      reference
        "RFC 1643 Definitions of Managed
        Objects for the Ethernet-like Interface Types.";
    }

    leaf in-interrupted-tx {
      type oc-yang:counter64;
      description
        "The number of received errored frames due to interrupted
        transmission issue. The value refers to MIB counter for
        dot3StatsDeferredTransmissions
        oid=1.3.6.1.2.1.10.7.2.1.7";
      reference
        "RFC 1643 Definitions of Managed
        Objects for the Ethernet-like Interface Types.";
    }

    leaf in-late-collision {
      type oc-yang:counter64;
      description
        "The number of received errored frames due to late collision
        issue. The value refers to MIB counter for
        dot3StatsLateCollisions
        oid=1.3.6.1.2.1.10.7.2.1.8";
      reference
        "RFC 1643 Definitions of Managed
        Objects for the Ethernet-like Interface Types.";
    }

    leaf in-mac-errors-rx {
      type oc-yang:counter64;
      description
        "The number of received errored frames due to MAC errors
        received. The value refers to MIB counter for
        dot3StatsInternalMacReceiveErrors
        oid=1.3.6.1.2.1.10.7.2.1.16";
      reference
        "RFC 1643 Definitions of Managed
        Objects for the Ethernet-like Interface Types.";
    }

    leaf in-single-collision {
      type oc-yang:counter64;
      description
        "The number of received errored frames due to single collision
        issue. The value refers to MIB counter for
        dot3StatsSingleCollisionFrames
        oid=1.3.6.1.2.1.10.7.2.1.4";
      reference
        "RFC 1643 Definitions of Managed
        Objects for the Ethernet-like Interface Types.";
     }

    leaf in-symbol-error {
      type oc-yang:counter64;
      description
        "The number of received errored frames due to symbol error.
        The value refers to MIB counter for
        in-symbol-error
        oid=1.3.6.1.2.1.10.7.2.1.18";
      reference
        "RFC 1643 Definitions of Managed
        Objects for the Ethernet-like Interface Types.";
    }

    leaf in-maxsize-exceeded {
      type oc-yang:counter64;
      description
        "The total number frames received that are well-formed but
        dropped due to exceeding the maximum frame size on the interface
        (e.g., MTU or MRU)";
    }

    // egress counters

    leaf out-mac-control-frames {
      type oc-yang:counter64;
      description
        "MAC layer control frames sent on the interface";
    }

    leaf out-mac-pause-frames {
      type oc-yang:counter64;
      description
        "MAC layer PAUSE frames sent on the interface";
    }

    leaf out-8021q-frames {
      type oc-yang:counter64;
      description
        "Number of 802.1q tagged frames sent on the interface";
    }

     leaf out-mac-errors-tx {
      type oc-yang:counter64;
      description
        "The number of sent errored frames due to MAC errors
         transmitted. The value refers to MIB counter for
         dot3StatsInternalMacTransmitErrors
         oid=1.3.6.1.2.1.10.7.2.1.10";
      reference
        "RFC 1643 Definitions of Managed
        Objects for the Ethernet-like Interface Types.";
     }

  }

  grouping ethernet-interface-state {
    description
      "Grouping for defining Ethernet-specific operational state";

    leaf hw-mac-address {
      type oc-yang:mac-address;
      description
        "Represenets the 'burned-in', or system-assigned, MAC
        address for the Ethernet interface.";
    }

    leaf negotiated-duplex-mode {
      type enumeration {
        enum FULL {
          description "Full duplex mode";
        }
        enum HALF {
          description "Half duplex mode";
        }
      }
      description
        "When auto-negotiate is set to TRUE, and the interface has
        completed auto-negotiation with the remote peer, this value
        shows the duplex mode that has been negotiated.";
    }

    leaf negotiated-port-speed {
      type identityref {
        base ETHERNET_SPEED;
      }
      description
        "When auto-negotiate is set to TRUE, and the interface has
        completed auto-negotiation with the remote peer, this value
        shows the interface speed that has been negotiated.";
    }

    container counters {
      description "Ethernet interface counters";

      uses ethernet-interface-state-counters;

    }

  }

  // data definition statements

  grouping ethernet-top {
    description "top-level Ethernet config and state containers";

    container ethernet {
      description
        "Top-level container for ethernet configuration
        and state";

      container config {
        description "Configuration data for ethernet interfaces";

        uses ethernet-interface-config;

      }

      container state {

        config false;
        description "State variables for Ethernet interfaces";

        uses ethernet-interface-config;
        uses ethernet-interface-state;

      }

    }
  }

  // augment statements

  augment "/oc-if:interfaces/oc-if:interface" {
    description "Adds addtional Ethernet-specific configuration to
    interfaces model";

    uses ethernet-top {
      when "oc-if:config/oc-if:type = 'ianaift:ethernetCsmacd'" {
      description "Additional interface configuration parameters when
      the interface type is Ethernet";
      }
    }
  }

  // rpc statements

  // notification statements

}