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 openconfig-yang-types {
      prefix oc-yang;
    }
    import openconfig-inet-types {
      prefix oc-inet;
    }
    import openconfig-evpn-types {
      prefix oc-evpn-types;
    }
    import openconfig-evpn {
      prefix oc-evpn;
    }

    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 "2023-12-13" {
      description
        "Expand when statement for connection-points endpoints";
      reference
        "4.3.0";

    }

    revision "2023-11-03" {
      description
        "Add reference URL for Route Redistribution rules";
      reference
        "4.2.2";

    }

    revision "2023-11-01" {
      description
        "Refactor apply policy to separate default policy in it's own common
      set of groupings";
      reference
        "4.2.1";

    }

    revision "2023-09-07" {
      description
        "Add L2RIB Per Producer Next-Hop Capability";
      reference
        "4.2.0";

    }

    revision "2023-08-09" {
      description
        "Update interface key to use interface-id type";
      reference
        "4.1.1";

    }

    revision "2023-07-12" {
      description
        "Moved ethernet-segments to top level
      container.";
      reference
        "4.1.0";

    }

    revision "2023-04-25" {
      description
        "Clarify use of interface-ref.";
      reference
        "4.0.3";

    }

    revision "2023-03-15" {
      description
        "Clarify that tables are to be deleted by the
      network operating system";
      reference
        "4.0.2";

    }

    revision "2023-02-07" {
      description
        "Add prefixes to identity values in when statements";
      reference
        "4.0.1";

    }

    revision "2022-12-21" {
      description
        "Removal of global per network-instance MTU";
      reference
        "4.0.0";

    }

    revision "2022-12-21" {
      description
        "Removal of interface list unique statement";
      reference
        "3.1.0";

    }

    revision "2022-12-20" {
      description
        "Removal of top-level enabled-address-families leaf-list";
      reference
        "3.0.0";

    }

    revision "2022-11-18" {
      description
        "Enforce network-instance type as mandatory, removal of top-level
      enabled leaf, migrate IETF types to OpenConfig types";
      reference
        "2.0.0";

    }

    revision "2022-09-15" {
      description "Add fallback-vrf option.";
      reference
        "1.4.0";

    }

    revision "2022-07-04" {
      description
        "Add pcep protocol to network-instance";
      reference
        "1.3.0";

    }

    revision "2022-06-21" {
      description
        "Add prefix to qualification netinst-ref.";
      reference
        "1.2.0";

    }

    revision "2022-04-20" {
      description
        "Add support for l2rib state data";
      reference
        "1.1.0";

    }

    revision "2022-04-19" {
      description
        "Description updates for DEFAULT_INSTANCE implementation
      guidance and default value/guidance for protocol instances";
      reference
        "1.0.0";

    }

    revision "2022-04-19" {
      description
        "Fix some broken xpath references in when statements.";
      reference
        "0.16.3";

    }

    revision "2021-11-17" {
      description
        "Add prefix to qualification prefix to when statements
      at identifier level.";
      reference
        "0.16.2";

    }

    revision "2021-07-22" {
      description
        "Remove unused imported models.";
      reference
        "0.16.1";

    }

    revision "2021-06-11" {
      description
        "Structural update for arp-proxy and
      proxy-nd.";
      reference
        "0.16.0";

    }

    revision "2021-01-25" {
      description "Add support for evpn";
      reference
        "0.15.0";

    }

    revision "2020-06-20" {
      description
        "Add support for toggling metric propagation
      when using table-connections.";
      reference
        "0.14.0";

    }

    revision "2019-11-28" {
      description
        "Revert fixes for paths in when statements";
      reference
        "0.13.2";

    }

    revision "2019-04-16" {
      description
        "Move BGP RIB into the protocol/bgp container.";
      reference
        "0.12.0";

    }

    revision "2018-11-21" {
      description
        "Add OpenConfig module metadata extensions.";
      reference
        "0.11.1";

    }

    revision "2018-08-11" {
      description
        "Add vlan id as additional key in MAC table";
      reference
        "0.11.0";

    }

    revision "2018-06-22" {
      description
        "Fix typo in OSPF when statement";
      reference
        "0.10.2";

    }

    revision "2018-06-05" {
      description
        "Fix bugs in when statements";
      reference
        "0.10.1";

    }

    revision "2018-02-19" {
      description
        "Add PIM and IGMP to network instance";
      reference
        "0.10.0";

    }

    revision "2017-12-13" {
      description
        "Fix incorrect constraint on SR and MPLS containers";
      reference
        "0.9.0";

    }

    revision "2017-08-24" {
      description "Minor formatting fixes";
      reference
        "0.8.1";

    }

    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 "4.3.0";

    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;

        uses oc-evpn:evpn-mac-mobility-top;

        uses oc-evpn:evpn-arp-proxy-top;

        uses oc-evpn:evpn-nd-proxy-top;

        uses l2ni-l2rib-top;
      }  // container fdb
    }  // grouping l2ni-instance

    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";
      }

      uses oc-evpn:evpn-mac-vrf-config;
    }  // 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 oc-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 on which the MAC address is present. The same MAC
        address may be seen on multiple VLANs in some cases.";
      }
    }  // 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.";
      }

      leaf evi {
        type oc-evpn-types:vni-id;
        description
          "EVPN EVI to associate with the BD/VLAN";
      }
    }  // 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 vlan";
            description
              "List of learned MAC addresses";
            leaf mac-address {
              type leafref {
                path "../config/mac-address";
              }
              description
                "Reference to mac-address list key";
            }

            leaf vlan {
              type leafref {
                path "../config/vlan";
              }
              description
                "Reference to vlan 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

    grouping l2ni-l2rib-top {
      description
        "Top-level grouping for l2rib MAC and MAC-IP table list";
      container l2rib {
        config false;
        description
          "Operational state container for MAC address and MAC-IP address
         information that is learned and installed into the MAC VRF Layer 2
         Routing Information Base (L2RIB)";
        container mac-table {
          description
            "Operational state container for MAC address information installed
           into the MAC VRF of the L2RIB";
          container entries {
            description
              "Enclosing container for list of MAC address entries";
            list entry {
              key "mac-address";
              description
                "List of learned MAC addresses";
              leaf mac-address {
                type leafref {
                  path
                    "../state/mac-address";
                }
                description
                  "Leafref of MAC address object";
              }

              container state {
                config false;
                description
                  "Operational state data for L2RIB MAC table object entry";
                uses l2ni-l2rib-mac-table-state;
              }  // container state

              container producers {
                description
                  "Source producers for each MAC Table entry";
                list producer {
                  key "producer";
                  description
                    "List of producers for each MAC table entry";
                  leaf producer {
                    type leafref {
                      path
                        "../state/producer";
                    }
                    description
                      "Reference to producer list key";
                  }

                  container state {
                    config false;
                    description
                      "State container for L2RIB MAC Table Entries";
                    uses l2ni-l2rib-common-producer-state;

                    uses l2ni-l2rib-mac-table-producer-state;
                  }  // container state
                }  // list producer
              }  // container producers
            }  // list entry
          }  // container entries

          uses l2ni-l2rib-common-next-hop-group-state;

          uses l2ni-l2rib-common-next-hop-state;
        }  // container mac-table

        container mac-ip-table {
          description
            "Operational state container for MAC-IP address information installed
           into the MAC VRF of the L2RIB";
          container entries {
            description
              "Enclosing container for list of MAC-IP address entries";
            list entry {
              key "mac-address host-ip";
              description
                "List of learned MAC-IP addresses";
              leaf mac-address {
                type leafref {
                  path
                    "../state/mac-address";
                }
                description
                  "Leafref of MAC-IP address object";
              }

              leaf host-ip {
                type leafref {
                  path "../state/host-ip";
                }
                description
                  "IP address of the Customer Edge device";
              }

              container state {
                config false;
                description
                  "Operational state data for L2RIB MAC-IP table object entry";
                uses l2ni-l2rib-mac-ip-table-state;
              }  // container state

              container producers {
                description
                  "Source producers for each MAC-IP Table entry";
                list producer {
                  key "producer";
                  description
                    "List of producers for each MAC-IP table entry";
                  leaf producer {
                    type leafref {
                      path
                        "../state/producer";
                    }
                    description
                      "Reference to producer list key";
                  }

                  container state {
                    config false;
                    description
                      "State container for L2RIB MAC Table Entries";
                    uses l2ni-l2rib-common-producer-state;
                  }  // container state
                }  // list producer
              }  // container producers
            }  // list entry
          }  // container entries

          uses l2ni-l2rib-common-next-hop-group-state;

          uses l2ni-l2rib-common-next-hop-state;
        }  // container mac-ip-table
      }  // container l2rib
    }  // grouping l2ni-l2rib-top

    grouping l2ni-l2rib-mac-table-state {
      description
        "L2RIB MAC Table Operational State Grouping";
      uses l2ni-l2rib-common-state;
    }  // grouping l2ni-l2rib-mac-table-state

    grouping l2ni-l2rib-mac-ip-table-state {
      description
        "L2RIB Mac-IP Table Operational State Grouping";
      uses l2ni-l2rib-common-state;

      leaf host-ip {
        type oc-inet:ip-address;
        description
          "Host IP address of the CE device for the L2RIB MAC-IP entry";
        reference
          "RFC7432: BGP MPLS-Based Ethernet VPN";

      }

      leaf l3-vni {
        type oc-evpn-types:evi-id;
        description
          "Symmetric IRB uses the same forwarding semantics when routing
         between IP subnets with VRF Lite or MPLS L3VPNs. With symmetric IRB,
         all traffic egressing and returning from a VTEP uses the same VNI.
         Specifically, the same Layer 3 VNI (L3VNI) associated with the VRF
         is used for all routed traffic. Layer3 VNI used for inter-subnet
         routing";
      }
    }  // grouping l2ni-l2rib-mac-ip-table-state

    grouping l2ni-l2rib-common-state {
      description
        "L2RIB Common Property Operational State Data Grouping";
      leaf mac-address {
        type oc-yang:mac-address;
        description
          "MAC address of the L2RIB MAC or MAC-IP entry";
      }

      leaf vlan {
        type leafref {
          path
            "../../../../../../../vlans/vlan/config/vlan-id";
        }
        description
          "VLAN on which the MAC or MAC-IP address is present.";
      }

      leaf evi {
        type oc-evpn-types:evi-id;
        description
          "EVPN Instance Identifier for the MAC or MAC-IP";
      }

      leaf l2-vni {
        type oc-evpn-types:evi-id;
        description
          "Layer2 VNI segment mapped to given vlan-id";
      }
    }  // grouping l2ni-l2rib-common-state

    grouping l2ni-l2rib-common-producer-state {
      description
        "L2RIB Common Producer Attributes Operational State Data Grouping";
      leaf producer {
        type enumeration {
          enum "LOCAL" {
            value 0;
            description
              "local producer source";
          }
          enum "STATIC" {
            value 1;
            description
              "static producer source";
          }
          enum "BGP" {
            value 2;
            description
              "bgp producer source";
          }
        }
        description
          "Source of the learned L2RIB route";
      }

      leaf seq-number {
        type uint32;
        description
          "The sequence number is used to ensure that PEs retain the correct
         MAC/IP Advertisement route when multiple updates occur for the same
         MAC address";
        reference
          "RFC7432: BGP MPLS-Based Ethernet VPN";

      }

      leaf mobility-state {
        type enumeration {
          enum "FROZEN" {
            value 0;
            description
              "Permanently frozen mac-address";
          }
          enum "DUPLICATE" {
            value 1;
            description
              "Duplicate mac-address";
          }
        }
        description
          "Indicates if learned MAC address is duplicate or frozen";
        reference
          "draft-ietf-bess-evpn-irb-extended-mobility-05";

      }

      leaf esi {
        type oc-evpn-types:esi;
        description
          "Ethernet Segment Identifier (ESI) for local and remote routes.
         ESI is used to resolve the next-hop-group. All mac-addresses
         learned with the same ESI should point to the same next-hop-group";
      }

      leaf sticky {
        type boolean;
        description
          "MAC address is sticky and not subjected to MAC moves";
        reference
          "RFC7432: BGP MPLS-Based Ethernet VPN";

      }

      leaf next-hop {
        type leafref {
          path
            "../../../../../../next-hops/next-hop/index";
        }
        status deprecated;
        description
          "Leafref next-hop for the MAC-IP table entry";
      }

      leaf-list next-hop-group {
        type leafref {
          path
            "../../../../../../next-hop-groups/next-hop-group/id";
        }
        description
          "Leafref next-hop-group for the MAC-IP table entry";
      }
    }  // grouping l2ni-l2rib-common-producer-state

    grouping l2ni-l2rib-common-next-hop-state {
      description
        "L2RIB Common Next Hop Attributes Operational State Data Grouping";
      container next-hops {
        description
          "A next-hop associated with the MAC or MAC-IP entry";
        list next-hop {
          key "index";
          description
            "List of next hop attributes for each MAC or MAC-IP";
          leaf index {
            type leafref {
              path "../state/index";
            }
            description
              "A unique index identifying the next-hop entry for the
             MAC or MAC-IP entry";
          }

          container state {
            config false;
            description
              "State container for common next-hop attributes";
            leaf index {
              type uint64;
              description
                "A unique entry for the next-hop.";
            }

            leaf peer-ip {
              type oc-inet:ip-address;
              description
                "Next hop peer address";
            }

            leaf label {
              type oc-evpn-types:evi-id;
              description
                "Next hop label representing the l2vni for the route";
            }

            leaf esi {
              type oc-evpn-types:esi;
              description
                "Ethernet Segment Identifier (ESI)";
              reference
                "RFC7432: BGP MPLS-Based Ethernet VPN";

            }

            leaf resolved {
              type boolean;
              description
                "Indicates if the path is eligible for forwarding as per evpn mass
               withdraw procedures as defined in RFC 7432";
            }

            uses oc-if:interface-ref-common;
          }  // container state
        }  // list next-hop
      }  // container next-hops
    }  // grouping l2ni-l2rib-common-next-hop-state

    grouping l2ni-l2rib-common-next-hop-group-state {
      description
        "L2RIB Common Next Hop Group Attributes Operational State Data Grouping";
      container next-hop-groups {
        description
          "Surrounding container for groups of L2RIB next-hops.";
        list next-hop-group {
          key "id";
          description
            "An individual set of next-hops grouped into a common group.
           Each entry within an L2RIB can optionally point to a
           next-hop-group.";
          leaf id {
            type leafref {
              path "../state/id";
            }
            description
              "A reference to a unique identifier for the next-hop-group.";
          }

          container state {
            config false;
            description
              "State container for common next-hop-group attributes";
            leaf id {
              type uint64;
              description
                "A unique identifier for the next-hop-group. This index is not
               expected to be consistent across reboots, or reprogramming of
               the next-hop-group. When updating a next-hop-group, if the group
               is removed by the system or assigned an alternate identifier, the
               system should send telemetry notifications deleting the previous
               identifier. If the identifier of the next-hop-group is changed,
               all L2RIB entries that reference it must also be updated.";
            }

            leaf esi {
              type oc-evpn-types:esi;
              description
                "Ethernet Segment Identifier (ESI)";
              reference
                "RFC7432: BGP MPLS-Based Ethernet VPN";

            }

            leaf type {
              type enumeration {
                enum "ESI" {
                  value 0;
                  description
                    "Per ESI pathlist next-hop-group used for evpn mass withdraw procedures as defined in RFC 7432";
                }
                enum "ESI_EVI" {
                  value 1;
                  description
                    "Per ESI,EVI pathlist next-hop-group used for evpn aliasing procedures as defined in RFC 7432";
                }
                enum "BASE_ECMP" {
                  value 2;
                  description
                    "Base ECMP next-hop-group used in absence of evpn aliasing";
                }
              }
              description
                "Type of next-hop-group";
            }
          }  // container state

          container next-hops {
            description
              "Surrounding container for the list of next-hops within the next-hop-group.";
            list next-hop {
              key "index";
              description
                "An individual next-hop within the next-hop-group. Each next-hop is a
               reference to an entry within the next-hop list.";
              leaf index {
                type leafref {
                  path "../state/index";
                }
                description
                  "A reference to the index for the next-hop within the the next-hop-group.";
              }

              container state {
                config false;
                description
                  "Operational state parameters related to a next-hop within the next-hop-group.";
                leaf index {
                  type leafref {
                    path
                      "../../../../../../next-hops/next-hop/index";
                  }
                  description
                    "A reference to the identifier for the next-hop to which the entry in the
                   next-hop group corresponds.";
                }
              }  // container state
            }  // list next-hop
          }  // container next-hops
        }  // list next-hop-group
      }  // container next-hop-groups
    }  // grouping l2ni-l2rib-common-next-hop-group-state

    grouping l2ni-l2rib-mac-table-producer-state {
      description
        "L2RIB MAC Table Operational State Data Grouping";
      leaf derived-from-mac-ip {
        type boolean;
        description
          "Derived from BGP MAC-IP route-type 2";
      }

      leaf directly-received {
        type boolean;
        description
          "BGP learned MAC route-type 2";
      }
    }  // grouping l2ni-l2rib-mac-table-producer-state
  }  // submodule openconfig-network-instance-l2