submodule openconfig-network-instance-l2 {

    yang-version 1;

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

    import openconfig-extensions {
      prefix oc-ext;
    }
    import openconfig-interfaces {
      prefix oc-if;
    }
    import ietf-yang-types {
      prefix yang;
    }

    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.";

    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";

    }

    oc-ext:openconfig-version "0.8.0";

    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 config

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

        uses l2ni-mac-table-top;
      }  // container fdb
    }  // grouping l2ni-instance

    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-instance-common-config

    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 {
        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-fdb-mac-config

    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-encapsulation-config

    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 {
        type leafref {
          path
            "../../../../../../vlans/vlan/config/vlan-id";
        }
        description
          "VLAN from which this MAC address was received";
      }
    }  // grouping l2ni-mac-table-config

    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" {
            value 0;
            description
              "Statically programmed MAC table entry";
          }
          enum "DYNAMIC" {
            value 1;
            description
              "Dynamically learned MAC table entry";
          }
        }
        description
          "Indicates whether the entry was statically configured, or
        dynamically learned.";
      }
    }  // grouping l2ni-mac-table-state

    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 config

            container state {
              config false;
              description
                "Operational state data for MAC table entries";
              uses l2ni-mac-table-config;

              uses l2ni-mac-table-state;
            }  // container state

            container interface {
              description
                "Reference to the base and/or subinterface for the
              MAC table entry";
              uses oc-if:interface-ref;
            }  // container interface
          }  // list entry
        }  // container entries
      }  // container mac-table
    }  // grouping l2ni-mac-table-top
  }  // submodule openconfig-network-instance-l2