submodule openconfig-network-instance-l2 {

  belongs-to openconfig-network-instance {
    prefix "oc-netinst";
  }


  // import some basic types
  import openconfig-extensions { prefix "oc-ext"; }
  import openconfig-interfaces { prefix "oc-if"; }
  import ietf-yang-types { prefix "yang"; }

  // meta
  organization "OpenConfig working group";

  contact
    "OpenConfig working group
    www.openconfig.net";

  description
    "This module contains groupings which specifically relate to
    Layer 2 network instance configuration and operational state
    parameters.";

  oc-ext:openconfig-version "0.8.0";

  revision "2017-02-28" {
    description
      "Add OSPFv2 to network instance";
    reference "0.8.0";
  }

  revision "2017-01-26" {
    description
      "Add policy forwarding to network instance";
    reference "0.7.0";
  }
    
  revision "2017-01-13" {
    description
      "Add AFT to the network instance";
    reference "0.6.0";
  }

  revision "2016-12-15" {
    description
      "Add segment routing to network instance";
    reference "0.5.0";
  }

  revision "2016-11-10" {
    description
      "Update model to include IS-IS.";
    reference "0.4.1";
  }

  revision "2016-10-12" {
    description
      "Update table connections";
    reference "0.4.0";
  }

  revision "2016-09-28" {
    description
      "Change L2 instance to submodule; add MAC table";
    reference "0.3.0";
  }

  revision "2016-08-11" {
    description
      "Resolve repeated container names in routing protocols";
    reference "0.2.3";
  }

  revision "2016-07-08" {
    description
      "Updated with refactored routing protocol models";
    reference "0.2.1";
  }

  revision "2016-03-29" {
    description
      "Initial revision";
    reference "0.2.0";
  }

  revision "2015-11-20" {
    description
      "Initial revision";
    reference "0.1.0";
  }

  grouping l2ni-instance {
    description
      "Configuration and operational state parameters relating
      to a Layer 2 network instance";

    container fdb {
      description
        "Operational state and configuration parameters relating to
        the forwarding database of the network instance";

      container config {
        description
          "Configuration parameters relating to the FDB";
        uses l2ni-fdb-mac-config;
      }
      container state {
        config false;
        description
          "Operational state parameters relating to the FDB";
        uses l2ni-fdb-mac-config;
      }

       uses l2ni-mac-table-top;
    }
  }

  grouping l2ni-instance-common-config {
    description
      "Common configuration options which are specific to Layer 2
      network instances";

    leaf mtu {
      type uint16;
      description
        "The maximum frame size which should be supported for this
        instance for Layer 2 frames";
    }

  }

  grouping l2ni-fdb-mac-config {
    description
      "Parameters relating to FDB behaviour relating to MAC
      addresses";

    leaf mac-learning {
      type boolean;
      description
        "When this leaf is set to true, MAC learning is enabled for
        the network instance, such that MAC addresses are learned
        from ingress frames and added to the FDB.";
    }

    leaf mac-aging-time {
      // Cisco supports one aging time for local and remote, but
      // can specify this time is absolute or against inactivity.
      // ALU SROS supports different aging times for local and remote
      // but does not allow absolute/inactivity specification.
      // JNPR supports only a single aging time, and no specification
      // of whether inactivity/absolute is used.
      // It is easy to augment new options in here for local remote
      // and an extra leaf to allow specification of the type of aging
      // so this is left as a single value.
      type uint16;
      units seconds;
      description
        "The number of seconds of inactivity after which the entry
        in the local FDB is timed out.";
    }

    leaf maximum-entries {
      type uint16;
      description
        "The maximum number of MAC address entries that should be
        accepted into the FDB";
    }
  }

  grouping l2ni-encapsulation-config {
    description
      "Encapsulation related configuration parameters for a L2
      network instance";

    leaf control-word {
      type boolean;
      description
        "Whether the control-word should be used for the network
        instance";
      reference "RFC3985";
    }
  }

  grouping l2ni-mac-table-config {
    description
      "Configuration data for MAC table entries";

    leaf mac-address {
      type yang:mac-address;
      description
        "MAC address for the dynamic or static MAC table
        entry";
    }

    leaf vlan {
      //TODO(aashaikh): Consider whether this should just reflect the
      //VLAN id or be a union type to also support displaying/setting
      //the VLAN by name (i.e., global VLAN configured in the VLAN
      // model).
      type leafref {
        path "../../../../../../vlans/vlan/config/vlan-id";
      }
      description
        "VLAN from which this MAC address was received";
    }
  }

  grouping l2ni-mac-table-state {
    description
      "Operational state data for MAC table entries";

    leaf age {
      type uint64;
      units seconds;
      description
        "The time in seconds since the MAC address has been in the
        table";
    }

    leaf entry-type {
      type enumeration {
        enum STATIC {
          description
            "Statically programmed MAC table entry";
        }
        enum DYNAMIC {
          description
            "Dynamically learned MAC table entry";
        }
      }
      description
        "Indicates whether the entry was statically configured, or
        dynamically learned.";
    }

  }

  grouping l2ni-mac-table-top {
    description
      "Top-level grouping for MAC table list";


    container mac-table {
      description
        "Table of learned or statically configured MAC addresses and
        corresponding VLANs in the bridge domain";

      container entries {
        description
          "Enclosing container for list of MAC table entries";

        list entry {
          key "mac-address";
          description
            "List of learned MAC addresses";

          leaf mac-address {
            type leafref {
              path "../config/mac-address";
            }
            description
              "Reference to mac-address list key";
          }

          container config {
            description
              "Configuration data for MAC table entries";

            uses l2ni-mac-table-config;
          }

          container state {

            config false;

            description
              "Operational state data for MAC table entries";

            uses l2ni-mac-table-config;
            uses l2ni-mac-table-state;
          }

          container interface {
            description
              "Reference to the base and/or subinterface for the
              MAC table entry";

            uses oc-if:interface-ref;
          }
        }
      }
    }
  }
}