module openconfig-if-aggregate {

    yang-version 1;

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

    prefix oc-lag;

    import openconfig-interfaces {
      prefix oc-if;
    }
    import openconfig-if-ethernet {
      prefix oc-eth;
    }
    import iana-if-type {
      prefix ianaift;
    }
    import openconfig-if-types {
      prefix oc-ift;
    }
    import openconfig-extensions {
      prefix oc-ext;
    }

    organization "OpenConfig working group";

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

    description
      "Model for managing aggregated (aka bundle, LAG) interfaces.";

    revision "2020-05-01" {
      description
        "Update when statements to reference config nodes
from config true elements.";
      reference
        "2.4.3";

    }

    revision "2019-04-16" {
      description
        "Update import prefix for iana-if-type module";
      reference
        "2.4.2";

    }

    revision "2018-11-21" {
      description
        "Add OpenConfig module metadata extensions.";
      reference
        "2.3.2";

    }

    revision "2018-03-23" {
      description
        "Fix/cleanup when statements in aggregates model.";
      reference
        "2.3.1";

    }

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

    }

    revision "2017-12-22" {
      description
        "Add IPv4 proxy ARP configuration.";
      reference
        "2.2.0";

    }

    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";

    }

    oc-ext:openconfig-version "2.4.3";
    oc-ext:regexp-posix;
    oc-ext:catalog-organization "openconfig";
    oc-ext:origin "openconfig";

    typedef aggregation-type {
      type enumeration {
        enum "LACP" {
          value 0;
          description "LAG managed by LACP";
        }
        enum "STATIC" {
          value 1;
          description
            "Statically configured bundle / LAG";
        }
      }
      description
        "Type to define the lag-type, i.e., how the LAG is
defined and managed";
    }

    grouping aggregation-logical-config {
      description
        "Configuration data for aggregate interfaces";
      leaf lag-type {
        type aggregation-type;
        description
          "Sets the type of LAG, i.e., how it is
configured / maintained";
      }

      leaf min-links {
        type uint16;
        description
          "Specifies the mininum number of member
interfaces that must be active for the aggregate interface
to be available";
      }
    }  // grouping aggregation-logical-config

    grouping aggregation-logical-state {
      description
        "Operational state data for aggregate interfaces";
      leaf lag-speed {
        type uint32;
        units "Mbps";
        description
          "Reports effective speed of the aggregate interface,
based on speed of active member interfaces";
      }

      leaf-list member {
        when
          "../../config/lag-type = 'STATIC'" {
          description
            "The simple list of member interfaces is active
when the aggregate is statically configured";
        }
        type oc-if:base-interface-ref;
        description
          "List of current member interfaces for the aggregate,
expressed as references to existing interfaces";
      }
    }  // grouping aggregation-logical-state

    grouping aggregation-logical-top {
      description
        "Top-level data definitions for LAGs";
      container aggregation {
        description
          "Options for logical interfaces representing
aggregates";
        container config {
          description
            "Configuration variables for logical aggregate /
LAG interfaces";
          uses aggregation-logical-config;
        }  // container config

        container state {
          config false;
          description
            "Operational state variables for logical
aggregate / LAG interfaces";
          uses aggregation-logical-config;

          uses aggregation-logical-state;
        }  // container state
      }  // container aggregation
    }  // grouping aggregation-logical-top

    grouping ethernet-if-aggregation-config {
      description
        "Adds configuration items for Ethernet interfaces
belonging to a logical aggregate / LAG";
      leaf aggregate-id {
        type leafref {
          path "/oc-if:interfaces/oc-if:interface/oc-if:name";
        }
        description
          "Specify the logical aggregate interface to which
this interface belongs";
      }
    }  // grouping ethernet-if-aggregation-config

    augment /oc-if:interfaces/oc-if:interface {
      description
        "Adds LAG configuration to the interface module";
      uses aggregation-logical-top {
        when
          "oc-if:config/oc-if:type = 'ianaift:ieee8023adLag' or oc-if:config/oc-if:type = 'oc-ift:IF_AGGREGATE'" {
          description
            "active when the interface is set to type LAG";
        }
      }
    }

    augment /oc-if:interfaces/oc-if:interface/oc-eth:ethernet/oc-eth:config {
      description
        "Adds LAG settings to individual Ethernet interfaces";
      uses ethernet-if-aggregation-config;
    }

    augment /oc-if:interfaces/oc-if:interface/oc-eth:ethernet/oc-eth:state {
      description
        "Adds LAG settings to individual Ethernet interfaces";
      uses ethernet-if-aggregation-config;
    }
  }  // module openconfig-if-aggregate