module org-openroadm-ospf {
  namespace "http://org/openroadm/ospf";
  prefix org-openroadm-ospf;

  import ietf-inet-types {
    prefix inet;
    revision-date 2013-07-15;
  }
  import ietf-yang-types {
    prefix yang;
    revision-date 2013-07-15;
  }
  import org-openroadm-device {
    prefix org-openroadm-device;
    revision-date 2020-05-29;
  }
  import org-openroadm-routing {
    prefix org-openroadm-routing;
    revision-date 2020-05-29;
  }
  import org-openroadm-key-chain {
    prefix org-openroadm-key-chain;
    revision-date 2019-11-29;
  }

  organization
    "Open ROADM MSA";
  contact
    "OpenROADM.org";
  description
    "This model defines the Yang model for ospf.

     This model reuses data items defined in the IETF YANG model for
     OSPF described by draft-ietf-ospf-yang-00.

     Some attributes which are not required in Open ROADM MSA are removed.
     Yang file included are changed to fit into Open ROADM MSA yang structure.

     IETF code is subject to the following copyright and license:
     Copyright (c) IETF Trust and the persons identified as authors of
     the code.
     All rights reserved.

     Redistribution and use in source and binary forms, with or without
     modification, is permitted pursuant to, and subject to the license
     terms contained in, the Simplified BSD License set forth in
     Section 4.c of the IETF Trust's Legal Provisions Relating
     to IETF Documents (http://trustee.ietf.org/license-info).";

  revision 2020-05-29 {
    description
      "Version 7.1.0";
  }
  revision 2020-03-27 {
    description
      "Version 7.0.0";
  }
  revision 2019-11-29 {
    description
      "Version 6.1.0";
  }
  revision 2019-09-27 {
    description
      "Version 6.0.0";
  }
  revision 2019-05-31 {
    description
      "Version 5.1.0";
  }
  revision 2019-03-29 {
    description
      "Version 5.0.0";
  }
  revision 2018-03-30 {
    description
      "Initial revision.";
  }

  feature multi-topology {
    description
      "Support MTR.";
  }

  feature multi-area-adj {
    description
      "OSPF multi-area adjacency support as in RFC 5185.";
  }

  feature router-id {
    description
      "Set router ID per instance.";
  }

  feature demand-circuit {
    description
      "OSPF demand circuit support as in RFC 1793.";
  }

  feature mtu-ignore {
    description
      "Disable OSPF MTU mismatch detection on receiving
       DBD packets.";
  }

  feature lls {
    description
      "OSPF link-local signaling (LLS) as in RFC 5613.";
  }

  feature prefix-suppression {
    description
      "OSPF prefix suppression support as in RFC 6860.";
  }

  feature bfd {
    description
      "OSPF BFD support.";
  }

  feature ttl-security {
    description
      "OSPF ttl security check.";
  }

  feature nsr {
    description
      "Non-Stop-Routing (NSR).";
  }

  feature graceful-restart {
    description
      "Graceful OSPF Restart as defined in RFC3623 and RFC5187.";
  }

  feature protocol-shutdown {
    description
      "Shutdown the protocol.";
  }

  feature auto-cost {
    description
      "Calculate OSPF interface cost according to
       reference bandwidth.";
  }

  feature max-ecmp {
    description
      "Setting maximum number of ECMP paths.";
  }

  feature max-lsa {
    description
      "Setting maximum number of LSAs OSPF will receive.";
  }

  feature te-rid {
    description
      "TE router-id.";
  }

  feature ldp-igp-sync {
    description
      "LDP IGP synchronization.";
  }

  feature ldp-igp-autoconfig {
    description
      "LDP IGP auto-config.";
  }

  feature protocol-if-shutdown {
    description
      "Shutdown the protocol over an interface.";
  }

  feature ospfv3-authentication-ipsec {
    description
      "Use IPsec for OSPFv3 authentication.";
  }

  feature instance-inheritance {
    description
      "Support instance inheritance";
  }

  feature area-inheritance {
    description
      "Support area inheritance";
  }

  feature interface-inheritance {
    description
      "Support interface inheritance";
  }

  identity ospf {
    base org-openroadm-routing:routing-protocol;
    description
      "OSPF Protocol";
  }

  identity ospfv2 {
    base ospf;
    description
      "OSPFv2";
  }

  identity ospfv3 {
    base ospf;
    description
      "OSPFv3";
  }

  identity operation-mode {
    description
      "OSPF operation mode.";
  }

  identity ships-in-the-night {
    base operation-mode;
    description
      "Ships-in-the-night operation mode in which
       each OSPF instance carries only one address family";
  }

  identity area-type {
    description
      "Base identity for OSPF area type.";
  }

  identity normal {
    base area-type;
    description
      "OSPF normal area.";
  }

  identity stub {
    base area-type;
    description
      "OSPF stub area.";
  }

  identity nssa {
    base area-type;
    description
      "OSPF NSSA area.";
  }

  identity if-link-type {
    description
      "Base identity for OSPF interface link type.";
  }

  identity if-link-type-normal {
    base if-link-type;
    description
      "OSPF interface link type normal.";
  }

  identity if-link-type-virtual-link {
    base if-link-type;
    description
      "OSPF interface link type virtual link.";
  }

  identity if-link-type-sham-link {
    base if-link-type;
    description
      "OSPF interface link type sham link.";
  }

  typedef uint24 {
    type uint32 {
      range "0 .. 16777215";
    }
    description
      "24-bit unsigned integer.";
  }

  typedef area-id-type {
    type union {
      type uint32;
      type yang:dotted-quad;
    }
    description
      "Area ID type.";
  }

  typedef if-state-type {
    type enumeration {
      enum Down {
        value 1;
        description
          "Interface down state";
      }
      enum Loopback {
        value 2;
        description
          "Interface loopback state";
      }
      enum Waiting {
        value 3;
        description
          "Interface waiting state";
      }
      enum Point-to-Point {
        value 4;
        description
          "Interface point-to-point state";
      }
      enum DR {
        value 5;
        description
          "Interface Designated Router (DR) state";
      }
      enum BDR {
        value 6;
        description
          "Interface Backup Designated Router (BDR) state";
      }
      enum DR-Other {
        value 7;
        description
          "Interface Other Designated Router state";
      }
    }
    description
      "OSPF interface state type.";
  }

  typedef nbr-state-type {
    type enumeration {
      enum Down {
        value 1;
        description
          "Neighbor down state";
      }
      enum Attempt {
        value 2;
        description
          "Neighbor attempt state";
      }
      enum Init {
        value 3;
        description
          "Neighbor init state";
      }
      enum 2-Way {
        value 4;
        description
          "Neighbor 2-Way state";
      }
      enum ExStart {
        value 5;
        description
          "Neighbor exchange start state";
      }
      enum Exchange {
        value 6;
        description
          "Neighbor exchange state";
      }
      enum Loading {
        value 7;
        description
          "Neighbor loading state";
      }
      enum Full {
        value 8;
        description
          "Neighbor full state";
      }
    }
    description
      "OSPF neighbor state type.";
  }

  typedef restart-helper-status-type {
    type enumeration {
      enum Not-Helping {
        value 1;
        description
          "Restart helper status not helping.";
      }
      enum Helping {
        value 2;
        description
          "Restart helper status helping.";
      }
    }
    description
      "Restart helper status type.";
  }

  typedef restart-exit-reason-type {
    type enumeration {
      enum None {
        value 1;
        description
          "Not attempted.";
      }
      enum InProgress {
        value 2;
        description
          "Restart in progress.";
      }
      enum Completed {
        value 3;
        description
          "Successfully completed.";
      }
      enum TimedOut {
        value 4;
        description
          "Timed out.";
      }
      enum TopologyChanged {
        value 5;
        description
          "Aborted due to topology change.";
      }
    }
    description
      "Describes the outcome of the last attempt at a
       graceful restart, either by itself or acting
       as a helper.";
  }

  typedef packet-type {
    type enumeration {
      enum Hello {
        value 1;
        description
          "OSPF hello packet.";
      }
      enum Database-Descripton {
        value 2;
        description
          "OSPF database description packet.";
      }
      enum Link-State-Request {
        value 3;
        description
          "OSPF link state request packet.";
      }
      enum Link-State-Update {
        value 4;
        description
          "OSPF link state update packet.";
      }
      enum Link-State-Ack {
        value 5;
        description
          "OSPF link state acknowlegement packet.";
      }
    }
    description
      "OSPF packet type.";
  }

  typedef nssa-translator-state-type {
    type enumeration {
      enum Enabled {
        value 1;
        description
          "NSSA translator enabled state.";
      }
      enum Elected {
        description
          "NSSA translator elected state.";
      }
      enum Disabled {
        value 3;
        description
          "NSSA translator disabled state.";
      }
    }
    description
      "OSPF NSSA translator state type.";
  }

  typedef restart-status-type {
    type enumeration {
      enum Not-Restarting {
        value 1;
        description
          "Router is not restarting.";
      }
      enum Planned-Restart {
        description
          "Router is going through planned restart.";
      }
      enum Unplanned-Restart {
        value 3;
        description
          "Router is going through unplanned restart.";
      }
    }
    description
      "OSPF graceful restart status type.";
  }

  grouping interface-common-config {
    description
      "Common configuration for all types of interfaces,
       including virtual link and sham link";
    leaf cost {
      type uint16 {
        range "1..65535" {
          error-message "Configured value is out of range";
        }
      }
      description
        "Interface cost.";
    }
    leaf hello-interval {
      type uint16 {
        range "1..65535" {
          error-message "Configured value is out of range";
        }
      }
      units "seconds";
      description
        "Time between hello packets.";
    }
    leaf dead-interval {
      type uint16 {
        range "1..65535" {
          error-message "Configured value is out of range";
        }
      }
      units "seconds";
      must '../dead-interval > ../hello-interval' {
        error-message "The dead interval must be larger than the hello interval";
        description
          "The value MUST be greater than 'hello-internval'.";
      }
      description
        "Interval after which a neighbor is declared dead.";
    }
    leaf rtrPriority {
      type uint8 {
        range "0..255";
      }
      description
        "Router priority for DR election.";
    }
    leaf retransmit-interval {
      type uint16 {
        range "1..65535" {
          error-message "Configured value is out of range";
        }
      }
      units "seconds";
      description
        "Time between retransmitting unacknowledged Link State
         Advertisements (LSAs).";
    }
    leaf transmit-delay {
      type uint16 {
        range "1..65535" {
          error-message "Configured value is out of range";
        }
      }
      units "seconds";
      description
        "Estimated time needed to send link-state update.";
    }
    leaf mtu-ignore {
      if-feature "mtu-ignore";
      type boolean;
      description
        "Enable/Disable ignoring of MTU in DBD packets.";
    }
    container authentication {
      description
        "Authentication configuration.";
      choice auth-type-selection {
        description
          "Options for expressing authentication setting";
        case auth-ipsec {
          when "../../../../../org-openroadm-routing:type = 'ospfv3'" {
            description
              "Applied to OSPFv3 only";
          }
          if-feature "ospfv3-authentication-ipsec";
          leaf sa {
            type string;
            description
              "SA name";
          }
        }
        case auth-trailer-key-chain {
          leaf key-chain {
            type org-openroadm-key-chain:key-chain-ref;
            description
              "key-chain name";
          }
        }
        case auth-trailer-key {
          leaf key {
            type string {
              length "1..8" {
                error-message "Configured string exceeds the maximum length";
              }
            }
            description
              "Key string in ASCII format.";
          }
        }
      }
    }
  }

  grouping interface-config {
    description
      "Configuration for real interfaces.";
    leaf network-type {
      type enumeration {
        enum broadcast {
          description
            "Specify OSPF broadcast multi-access network.";
        }
        enum non-broadcast {
          description
            "Specify OSPF Non-Broadcast Multi-Access
             (NBMA) network.";
        }
        enum point-to-multipoint {
          description
            "Specify OSPF point-to-multipoint network.";
        }
        enum point-to-point {
          description
            "Specify OSPF point-to-point network.";
        }
      }
      description
        "Network type.";
    }
    leaf passive {
      type boolean;
      description
        "Enable/Disable passive.";
    }
    uses interface-common-config;
  }

  grouping tlv {
    description
      "TLV";
    leaf type {
      type uint16;
      description
        "TLV type.";
    }
    leaf length {
      type uint16;
      description
        "TLV length.";
    }
    leaf value {
      type yang:hex-string;
      description
        "TLV value.";
    }
  }

  grouping ospfv2-lsa-body {
    description
      "OSPFv2 LSA body.";
    container router {
      when '../../header/type = 1' {
        description
          "Only apply to Router-LSA.";
      }
      description
        "Router LSA.";
      leaf flags {
        type bits {
          bit V {
            description
              "When set, the router is an endpoint of one or
               more virtual links.";
          }
          bit E {
            description
              "When set, the router is an AS Boundary Router
               (ASBR).";
          }
          bit B {
            description
              "When set, the router is an Area Border Router (ABR).";
          }
        }
        description
          "Flags";
      }
      leaf num-of-links {
        type uint16;
        description
          "Number of links.";
      }
      list link {
        key "link-id link-data";
        description
          "Router LSA link.";
        leaf link-id {
          type union {
            type inet:ipv4-address;
            type yang:dotted-quad;
          }
          description
            "Link ID";
        }
        leaf link-data {
          type union {
            type inet:ipv4-address;
            type uint32;
          }
          description
            "Link data.";
        }
        leaf type {
          type uint8;
          description
            "Link type.";
        }
        list topology {
          key "mt-id";
          description
            "Topology specific information.";
          leaf mt-id {
            type uint8;
            description
              "The MT-ID for topology enabled on the link.";
          }
          leaf metric {
            type uint16;
            description
              "Metric for the topology.";
          }
        }
      }
    }
    container network {
      when '../../header/type = 2' {
        description
          "Only apply to network LSA.";
      }
      description
        "Network LSA.";
      leaf network-mask {
        type inet:ipv4-address;
        description
          "The IP address mask for the network";
      }
      leaf-list attached-router {
        type yang:dotted-quad;
        description
          "List of the routers attached to the network.";
      }
    }
    container summary {
      when '../../header/type = 3 or ../../header/type = 4' {
        description
          "Only apply to Summary-LSA.";
      }
      description
        "Summary LSA.";
      leaf network-mask {
        type inet:ipv4-address;
        description
          "The IP address mask for the network";
      }
      list topology {
        key "mt-id";
        description
          "Topology specific information.";
        leaf mt-id {
          type uint8;
          description
            "The MT-ID for topology enabled on the link.";
        }
        leaf metric {
          type uint24;
          description
            "Metric for the topology.";
        }
      }
    }
    container external {
      when '../../header/type = 5 or ../../header/type = 7' {
        description
          "Only apply to AS-external-LSA and NSSA-LSA.";
      }
      description
        "External LSA.";
      leaf network-mask {
        type inet:ipv4-address;
        description
          "The IP address mask for the network";
      }
      list topology {
        key "mt-id";
        description
          "Topology specific information.";
        leaf mt-id {
          type uint8;
          description
            "The MT-ID for topology enabled on the link.";
        }
        leaf flags {
          type bits {
            bit E {
              description
                "When set, the metric specified is a Type 2
                 external metric.";
            }
          }
          description
            "Flags.";
        }
        leaf metric {
          type uint24;
          description
            "Metric for the topology.";
        }
        leaf forwarding-address {
          type inet:ipv4-address;
          description
            "Forwarding address.";
        }
        leaf external-route-tag {
          type uint32;
          description
            "Route tag.";
        }
      }
    }
  }

  grouping ospfv3-lsa-options {
    description
      "OSPFv3 LSA options";
    leaf options {
      type bits {
        bit DC {
          description
            "When set, the router support demand circuits.";
        }
        bit R {
          description
            "When set, the originator is an active router.";
        }
        bit N {
          description
            "If set, the router is attached to an NSSA";
        }
        bit E {
          description
            "This bit describes the way AS-external-LSAs
             are flooded";
        }
        bit V6 {
          description
            "If clear, the router/link should be excluded
             from IPv6 routing calculaton";
        }
      }
      mandatory true;
      description
        "OSPFv3 LSA options.";
    }
  }

  grouping ospfv3-lsa-prefix {
    description
      "OSPFv3 LSA prefix.";
    leaf prefix {
      type inet:ip-prefix;
      description
        "Prefix";
    }
    leaf prefix-options {
      type bits {
        bit NU {
          description
            "When set, the prefix should be excluded
             from IPv6 unicast calculations.";
        }
        bit LA {
          description
            "When set, the prefix is actually an IPv6 interface
             address of the Advertising Router.";
        }
        bit P {
          description
            "When set, the NSSA area prefix should be
             readvertised by the translating NSSA area border.";
        }
        bit DN {
          description
            "When set, the inter-area-prefix-LSA or
             AS-external-LSA prefix has been advertised in a VPN
             environment.";
        }
      }
      mandatory true;
      description
        "Prefix options.";
    }
  }

  grouping ospfv3-lsa-external {
    description
      "AS-External and NSSA LSA.";
    leaf metric {
      type uint24;
      description
        "Metric";
    }
    leaf flags {
      type bits {
        bit E {
          description
            "When set, the metric specified is a Type 2
             external metric.";
        }
      }
      description
        "Flags.";
    }
    leaf referenced-ls-type {
      type uint16;
      description
        "Referenced Link State type.";
    }
    uses ospfv3-lsa-prefix;
    leaf forwarding-address {
      type inet:ipv6-address;
      description
        "Forwarding address.";
    }
    leaf external-route-tag {
      type uint32;
      description
        "Route tag.";
    }
    leaf referenced-link-state-id {
      type uint32;
      description
        "Referenced Link State ID.";
    }
  }

  grouping ospfv3-lsa-body {
    description
      "OSPFv3 LSA body.";
    container router {
      when '../../header/type = 8193' {
        description
          "Only apply to Router-LSA.";
      }
      description
        "Router LSA.";
      leaf flags {
        type bits {
          bit V {
            description
              "When set, the router is an endpoint of one or
               more virtual links.";
          }
          bit E {
            description
              "When set, the router is an AS Boundary Router
               (ASBR).";
          }
          bit B {
            description
              "When set, the router is an Area Border Router (ABR).";
          }
          bit Nt {
            description
              "When set, the router is an NSSA border router
               that is unconditionally translating NSSA-LSAs
               into AS-external-LSAs.";
          }
        }
        mandatory true;
        description
          "LSA option.";
      }
      uses ospfv3-lsa-options;
      list link {
        key "interface-id neighbor-interface-id neighbor-router-id";
        description
          "Router LSA link.";
        leaf interface-id {
          type uint32;
          description
            "Interface ID.";
        }
        leaf neighbor-interface-id {
          type uint32;
          description
            "Neighbor Interface ID.";
        }
        leaf neighbor-router-id {
          type yang:dotted-quad;
          description
            "Neighbor Router ID";
        }
        leaf type {
          type uint8;
          description
            "Link type.";
        }
        leaf metric {
          type uint16;
          description
            "Metric.";
        }
      }
    }
    container network {
      when '../../header/type = 8194' {
        description
          "Only apply to network LSA.";
      }
      description
        "Network LSA.";
      uses ospfv3-lsa-options;
      leaf-list attached-router {
        type yang:dotted-quad;
        description
          "List of the routers attached to the network.";
      }
    }
    container inter-area-prefix {
      when '../../header/type = 8195' {
        description
          "Only apply to inter-area-prefix LSA.";
      }
      description
        "Inter-Area-Prefix LSA.";
      leaf metric {
        type uint24;
        description
          "Metric";
      }
      uses ospfv3-lsa-prefix;
    }
    container inter-area-router {
      when '../../header/type = 8196' {
        description
          "Only apply to inter-area-router LSA.";
      }
      description
        "Inter-Area-Router LSA.";
      uses ospfv3-lsa-options;
      leaf metric {
        type uint24;
        description
          "Metric";
      }
      leaf destination-router-id {
        type yang:dotted-quad;
        description
          "The Router ID of the router being described by the LSA.";
      }
    }
    container as-external {
      when '../../header/type = 16389' {
        description
          "Only apply to as-external LSA.";
      }
      description
        "AS-External LSA.";
      uses ospfv3-lsa-external;
    }
    container nssa {
      when '../../header/type = 8199' {
        description
          "Only apply to nssa LSA.";
      }
      description
        "NSSA LSA.";
      uses ospfv3-lsa-external;
    }
    container link {
      when '../../header/type = 8' {
        description
          "Only apply to link LSA.";
      }
      description
        "Link LSA.";
      leaf rtr-priority {
        type uint8;
        description
          "Router Priority of the interface.";
      }
      uses ospfv3-lsa-options;
      leaf link-local-interface-address {
        type inet:ipv6-address;
        description
          "The originating router's link-local
           interface address on the link.";
      }
      leaf num-of-prefixes {
        type uint32;
        description
          "Number of prefixes.";
      }
      list prefix {
        key "prefix";
        description
          "List of prefixes associated with the link.";
        uses ospfv3-lsa-prefix;
      }
    }
    container intra-area-prefix {
      when '../../header/type = 8201' {
        description
          "Only apply to intra-area-prefix LSA.";
      }
      description
        "Intra-Area-Prefix LSA.";
      leaf referenced-ls-type {
        type uint16;
        description
          "Referenced Link State type.";
      }
      leaf referenced-link-state-id {
        type uint32;
        description
          "Referenced Link State ID.";
      }
      leaf referenced-adv-router {
        type inet:ipv4-address;
        description
          "Referenced Advertising Router.";
      }
      leaf num-of-prefixes {
        type uint16;
        description
          "Number of prefixes.";
      }
      list prefix {
        key "prefix";
        description
          "List of prefixes associated with the link.";
        uses ospfv3-lsa-prefix;
        leaf metric {
          type uint24;
          description
            "Metric";
        }
      }
    }
  }

  grouping lsa-header {
    description
      "Common LSA for OSPFv2 and OSPFv3";
    leaf age {
      type uint16;
      mandatory true;
      description
        "LSA age.";
    }
    leaf type {
      type uint16;
      mandatory true;
      description
        "LSA type.";
    }
    leaf adv-router {
      type yang:dotted-quad;
      mandatory true;
      description
        "LSA advertising router.";
    }
    leaf seq-num {
      type uint32;
      mandatory true;
      description
        "LSA sequence number.";
    }
    leaf checksum {
      type uint16;
      mandatory true;
      description
        "LSA checksum.";
    }
    leaf length {
      type uint16;
      mandatory true;
      description
        "LSA length.";
    }
  }

  grouping ospfv2-lsa {
    description
      "OSPFv2 LSA.";
    container header {
      description
        "Decoded OSPFv2 LSA header data.";
      leaf option {
        type bits {
          bit DC {
            description
              "When set, the router support demand circuits.";
          }
          bit P {
            description
              "Only used in type-7 LSA. When set, the NSSA
               border router should translate the type-7 LSA
               to type-5 LSA.";
          }
          bit MC {
            description
              "When set, the router support MOSPF.";
          }
          bit E {
            description
              "This bit describes the way AS-external-LSAs
               are flooded";
          }
        }
        mandatory true;
        description
          "LSA option.";
      }
      leaf lsa-id {
        type inet:ipv4-address;
        mandatory true;
        description
          "LSA ID.";
      }
      leaf opaque-type {
        when '../../header/type = 9 or ../../header/type = 10 or ../../header/type = 11' {
          description
            "Only apply to opaque LSA.";
        }
        type uint8;
        mandatory true;
        description
          "Opaque type.";
      }
      leaf opaque-id {
        when '../../header/type = 9 or ../../header/type = 10 or ../../header/type = 11' {
          description
            "Only apply to opaque LSA.";
        }
        type uint24;
        mandatory true;
        description
          "Opaque id.";
      }
      uses lsa-header;
    }
    container body {
      description
        "Decoded OSPFv2 LSA body data.";
      uses ospfv2-lsa-body;
    }
  }

  grouping ospfv3-lsa {
    description
      "Decoded OSPFv3 LSA.";
    container header {
      description
        "Decoded OSPFv3 LSA header data.";
      leaf lsa-id {
        type uint32;
        mandatory true;
        description
          "LSA ID.";
      }
      uses lsa-header;
    }
    container body {
      description
        "Decoded OSPF LSA body data.";
      uses ospfv3-lsa-body;
    }
  }

  grouping lsa-common {
    description
      "Common field for OSPF LSA represenation.";
    leaf decoded-completed {
      type boolean;
      description
        "The OSPF LSA body is fully decoded.";
    }
  }

  grouping link-scope-lsa {
    description
      "OSPF link-scope LSA.";
    uses lsa-common;
    choice version {
      description
        "OSPFv2 or OSPFv3 LSA body.";
      container ospfv2 {
        when "../../../../../../../org-openroadm-routing:type = 'org-openroadm-ospf:ospfv2'" {
          description
            "Applied to OSPFv2 only";
        }
        description
          "OSPFv2 LSA";
        uses ospfv2-lsa;
      }
      container ospfv3 {
        when "../../../../../../../org-openroadm-routing:type = 'ospfv3'" {
          description
            "Applied to OSPFv3 only";
        }
        description
          "OSPFv3 LSA";
        uses ospfv3-lsa;
      }
    }
  }

  grouping area-scope-lsa {
    description
      "OSPF area-scope LSA.";
    uses lsa-common;
    choice version {
      description
        "OSPFv2 or OSPFv3 LSA body.";
      container ospfv2 {
        when "../../../../../../org-openroadm-routing:type = 'org-openroadm-ospf:ospfv2'" {
          description
            "Applied to OSPFv2 only";
        }
        description
          "OSPFv2 LSA";
        uses ospfv2-lsa;
      }
      container ospfv3 {
        when "../../../../../../org-openroadm-routing:type = 'ospfv3'" {
          description
            "Applied to OSPFv3 only";
        }
        description
          "OSPFv3 LSA";
        uses ospfv3-lsa;
      }
    }
  }

  grouping as-scope-lsa {
    description
      "OSPF AS-scope LSA.";
    uses lsa-common;
    choice version {
      description
        "OSPFv2 or OSPFv3 LSA body.";
      container ospfv2 {
        when "../../../../../org-openroadm-routing:type = 'org-openroadm-ospf:ospfv2'" {
          description
            "Applied to OSPFv2 only";
        }
        description
          "OSPFv2 LSA";
        uses ospfv2-lsa;
      }
      container ospfv3 {
        when "../../../../../org-openroadm-routing:type = 'ospfv3'" {
          description
            "Applied to OSPFv3 only";
        }
        description
          "OSPFv3 LSA";
        uses ospfv3-lsa;
      }
    }
  }

  grouping lsa-key {
    description
      "OSPF LSA key.";
    leaf lsa-id {
      type union {
        type inet:ipv4-address;
        type uint32;
      }
      description
        "LSA ID.";
    }
    leaf adv-router {
      type inet:ipv4-address;
      description
        "Advertising router.";
    }
  }

  grouping af-area-config {
    description
      "OSPF address-family specific area config state.";
    list range {
      key "prefix";
      description
        "Summarize routes matching address/mask (border
         routers only)";
      leaf prefix {
        type inet:ip-prefix;
        description
          "IPv4 or IPv6 prefix";
      }
      leaf advertise {
        type boolean;
        description
          "Advertise or hide.";
      }
      leaf cost {
        type uint24 {
          range "0..16777214";
        }
        description
          "Cost of summary route.";
      }
    }
  }

  grouping area-config {
    description
      "OSPF area config state.";
    leaf area-type {
      type identityref {
        base area-type;
      }
      default "normal";
      description
        "Area type.";
    }
    leaf summary {
      when "../area-type = 'stub' or ../area-type = 'nssa'" {
        description
          "Summary generation valid for stub/NSSA area.";
      }
      type boolean;
      description
        "Enable/Disable summary generation to the stub or
         NSSA area.";
    }
    leaf default-cost {
      when "../area-type = 'stub' or ../area-type = 'nssa'" {
        description
          "Default cost for LSA advertised into stub or
           NSSA area.";
      }
      type uint32 {
        range "1..16777215";
      }
      description
        "Set the summary default-cost for a stub or NSSA area.";
    }
    uses af-area-config {
      when "/org-openroadm-device:org-openroadm-device/org-openroadm-routing:routing/org-openroadm-routing:routing-instance/org-openroadm-routing:routing-protocols/org-openroadm-routing:routing-protocol/org-openroadm-ospf:ospf/org-openroadm-ospf:operation-mode = 'org-openroadm-ospf:ships-in-the-night'" {
        description
          "Ships in the night configuration.";
      }
    }
  }

  grouping instance-config {
    description
      "OSPF instance config state.";
    leaf router-id {
      if-feature "router-id";
      type yang:dotted-quad;
      mandatory true;
      description
        "Defined in RFC 2328. A 32-bit number
         that uniquely identifies the router.";
    }
    container admin-distance {
      description
        "Admin distance config state.";
      choice granularity {
        description
          "Options for expressing admin distance
           for intra-area and inter-area route";
        case detail {
          leaf intra-area {
            type uint8 {
              range "1..255" {
                error-message "Configured value is out of range";
              }
            }
            description
              "Admin distance for intra-area route.";
          }
          leaf inter-area {
            type uint8 {
              range "1..255" {
                error-message "Configured value is out of range";
              }
            }
            description
              "Admin distance for inter-area route.";
          }
        }
      }
      leaf external {
        type uint8 {
          range "1..255" {
            error-message "Configured value is out of range";
          }
        }
        description
          "Admin distance for both external route.";
      }
    }
    container graceful-restart {
      if-feature "graceful-restart";
      description
        "Graceful restart config state.";
      leaf enable {
        type boolean;
        description
          "Enable/Disable graceful restart as defined in RFC 3623.";
      }
      leaf helper-enable {
        type boolean;
        default "true";
        description
          "Enable RestartHelperSupport in RFC 3623 Section B.2.";
      }
      leaf restart-interval {
        type uint16 {
          range "1..1800";
        }
        units "seconds";
        default "120";
        description
          "RestartInterval option in RFC 3623 Section B.1.";
      }
      leaf helper-strict-lsa-checking {
        type boolean;
        description
          "RestartHelperStrictLSAChecking option in RFC 3623
           Section B.2.";
      }
    }
    container auto-cost {
      if-feature "auto-cost";
      description
        "Auto cost config state.";
      leaf enable {
        type boolean;
        description
          "Enable/Disable auto cost.";
      }
      leaf reference-bandwidth {
        type uint32 {
          range "1..4294967";
        }
        units "Mbits";
        description
          "Configure reference bandwidth in term of Mbits";
      }
    }
  }

  grouping interface-operation {
    description
      "OSPF interface operation state.";
    reference
      "RFC2328 Section 9";
    uses interface-config;
    leaf state {
      type if-state-type;
      description
        "Interface state.";
    }
    leaf hello-timer {
      type uint32;
      units "milliseconds";
      description
        "Hello timer.";
    }
    leaf wait-timer {
      type uint32;
      units "milliseconds";
      description
        "Wait timer.";
    }
    leaf dr {
      type inet:ipv4-address;
      description
        "DR.";
    }
    leaf bdr {
      type inet:ipv4-address;
      description
        "BDR.";
    }
  }

  grouping neighbor-operation {
    description
      "OSPF neighbor operation data.";
    leaf address {
      type inet:ip-address;
      description
        "Neighbor address.";
    }
    leaf dr {
      type inet:ipv4-address;
      description
        "Designated Router.";
    }
    leaf bdr {
      type inet:ipv4-address;
      description
        "Backup Designated Router.";
    }
    leaf state {
      type nbr-state-type;
      description
        "OSPF neighbor state.";
    }
  }

  grouping instance-operation {
    description
      "OSPF Address Family operation state.";
    leaf router-id {
      type yang:dotted-quad;
      description
        "Defined in RFC 2328. A 32-bit number
         that uniquely identifies the router.";
    }
  }

  grouping route-content {
    description
      "This grouping defines OSPF-specific route attributes.";
    leaf metric {
      type uint32;
      description
        "OSPF route metric.";
    }
    leaf tag {
      type uint32;
      default "0";
      description
        "OSPF route tag.";
    }
    leaf route-type {
      type enumeration {
        enum intra-area {
          description
            "OSPF intra-area route";
        }
        enum inter-area {
          description
            "OSPF inter-area route";
        }
        enum external-1 {
          description
            "OSPF external route type 1";
        }
        enum external-2 {
          description
            "OSPF External route type 2";
        }
        enum nssa-1 {
          description
            "OSPF NSSA external route type 1";
        }
        enum nssa-2 {
          description
            "OSPF NSSA external route type 2";
        }
      }
      description
        "OSPF route type";
    }
  }

  grouping notification-instance-hdr {
    description
      "This group describes common instance specific
       data for notifications.";
    leaf routing-instance {
      type org-openroadm-routing:routing-instance-ref;
      description
        "Describe the routing instance.";
    }
    leaf routing-protocol-name {
      type string;
      description
        "Describes the name of the OSPF routing protocol.";
    }
    container instance-af {
      description
        "Describes the address family of the OSPF instance.";
      leaf af {
        type identityref {
          base org-openroadm-routing:address-family;
        }
        description
          "Address-family of the instance.";
      }
    }
  }

  notification if-state-change {
    description
      "This notification is sent when interface
       state change is detected.";
    uses notification-instance-hdr;
    leaf link-type {
      type identityref {
        base if-link-type;
      }
      description
        "Type of OSPF interface.";
    }
    container interface {
      description
        "Normal interface.";
      leaf interface {
        type org-openroadm-device:interface-ref;
        description
          "Interface.";
      }
    }
    container virtual-link {
      description
        "virtual-link.";
      leaf area-id {
        type uint32;
        description
          "Area ID.";
      }
      leaf neighbor-router-id {
        type yang:dotted-quad;
        description
          "Neighbor router id.";
      }
    }
    container sham-link {
      description
        "sham-link.";
      leaf area-id {
        type uint32;
        description
          "Area ID.";
      }
      leaf local-ip-addr {
        type inet:ip-address;
        description
          "Sham link local address.";
      }
      leaf remote-ip-addr {
        type inet:ip-address;
        description
          "Sham link remote address.";
      }
    }
    leaf state {
      type if-state-type;
      description
        "Interface state.";
    }
  }

  notification if-config-error {
    description
      "This notification is sent when interface
       config error is detected.";
    uses notification-instance-hdr;
    leaf link-type {
      type identityref {
        base if-link-type;
      }
      description
        "Type of OSPF interface.";
    }
    container interface {
      description
        "Normal interface.";
      leaf interface {
        type org-openroadm-device:interface-ref;
        description
          "Interface.";
      }
      leaf packet-source {
        type yang:dotted-quad;
        description
          "Source address.";
      }
    }
    container virtual-link {
      description
        "virtual-link.";
      leaf area-id {
        type uint32;
        description
          "Area ID.";
      }
      leaf neighbor-router-id {
        type yang:dotted-quad;
        description
          "Neighbor router id.";
      }
    }
    container sham-link {
      description
        "sham-link.";
      leaf area-id {
        type uint32;
        description
          "Area ID.";
      }
      leaf local-ip-addr {
        type inet:ip-address;
        description
          "Sham link local address.";
      }
      leaf remote-ip-addr {
        type inet:ip-address;
        description
          "Sham link remote address.";
      }
    }
    leaf packet-type {
      type packet-type;
      description
        "OSPF packet type.";
    }
    leaf error {
      type enumeration {
        enum badVersion {
          description
            "Bad version";
        }
        enum areaMismatch {
          description
            "Area mistmatch";
        }
        enum unknownNbmaNbr {
          description
            "Unknown NBMA neighbor";
        }
        enum unknownVirtualNbr {
          description
            "Unknown virtual link neighbor";
        }
        enum authTypeMismatch {
          description
            "Auth type mismatch";
        }
        enum authFailure {
          description
            "Auth failure";
        }
        enum netMaskMismatch {
          description
            "Network mask mismatch";
        }
        enum helloIntervalMismatch {
          description
            "Hello interval mismatch";
        }
        enum deadIntervalMismatch {
          description
            "Dead interval mismatch";
        }
        enum optionMismatch {
          description
            "Option mismatch";
        }
        enum mtuMismatch {
          description
            "MTU mismatch";
        }
        enum duplicateRouterId {
          description
            "Duplicate router ID";
        }
        enum noError {
          description
            "No error";
        }
      }
      description
        "Error code.";
    }
  }

  notification nbr-state-change {
    description
      "This notification is sent when neighbor
       state change is detected.";
    uses notification-instance-hdr;
    leaf link-type {
      type identityref {
        base if-link-type;
      }
      description
        "Type of OSPF interface.";
    }
    container interface {
      description
        "Normal interface.";
      leaf interface {
        type org-openroadm-device:interface-ref;
        description
          "Interface.";
      }
      leaf neighbor-router-id {
        type yang:dotted-quad;
        description
          "Neighbor router id.";
      }
      leaf neighbor-ip-addr {
        type yang:dotted-quad;
        description
          "Neighbor address.";
      }
    }
    container virtual-link {
      description
        "virtual-link.";
      leaf area-id {
        type uint32;
        description
          "Area ID.";
      }
      leaf neighbor-router-id {
        type yang:dotted-quad;
        description
          "Neighbor router id.";
      }
    }
    container sham-link {
      description
        "sham-link.";
      leaf area-id {
        type uint32;
        description
          "Area ID.";
      }
      leaf local-ip-addr {
        type inet:ip-address;
        description
          "Sham link local address.";
      }
      leaf neighbor-router-id {
        type yang:dotted-quad;
        description
          "Neighbor router id.";
      }
      leaf neighbor-ip-addr {
        type yang:dotted-quad;
        description
          "Neighbor address.";
      }
    }
    leaf state {
      type nbr-state-type;
      description
        "Neighbor state.";
    }
  }

  notification nbr-restart-helper-status-change {
    description
      "This notification is sent when neighbor restart
       helper status change is detected.";
    uses notification-instance-hdr;
    leaf link-type {
      type identityref {
        base if-link-type;
      }
      description
        "Type of OSPF interface.";
    }
    container interface {
      description
        "Normal interface.";
      leaf interface {
        type org-openroadm-device:interface-ref;
        description
          "Interface.";
      }
      leaf neighbor-router-id {
        type yang:dotted-quad;
        description
          "Neighbor router id.";
      }
      leaf neighbor-ip-addr {
        type yang:dotted-quad;
        description
          "Neighbor address.";
      }
    }
    container virtual-link {
      description
        "virtual-link.";
      leaf area-id {
        type uint32;
        description
          "Area ID.";
      }
      leaf neighbor-router-id {
        type yang:dotted-quad;
        description
          "Neighbor router id.";
      }
    }
    leaf status {
      type restart-helper-status-type;
      description
        "Restart helper status.";
    }
    leaf age {
      type uint32;
      units "seconds";
      description
        "Remaining time in current OSPF graceful restart
         interval, if the router is acting as a restart
         helper for the neighbor.";
    }
    leaf exit-reason {
      type restart-exit-reason-type;
      description
        "Restart helper exit reason.";
    }
  }

  notification rx-bad-packet {
    description
      "This notification is sent when an OSPF packet
       has been received on a interface that cannot be parsed.";
    uses notification-instance-hdr;
    leaf link-type {
      type identityref {
        base if-link-type;
      }
      description
        "Type of OSPF interface.";
    }
    container interface {
      description
        "Normal interface.";
      leaf interface {
        type org-openroadm-device:interface-ref;
        description
          "Interface.";
      }
      leaf packet-source {
        type yang:dotted-quad;
        description
          "Source address.";
      }
    }
    container virtual-link {
      description
        "virtual-link.";
      leaf area-id {
        type uint32;
        description
          "Area ID.";
      }
      leaf neighbor-router-id {
        type yang:dotted-quad;
        description
          "Neighbor router id.";
      }
    }
    container sham-link {
      description
        "sham-link.";
      leaf area-id {
        type uint32;
        description
          "Area ID.";
      }
      leaf local-ip-addr {
        type inet:ip-address;
        description
          "Sham link local address.";
      }
      leaf remote-ip-addr {
        type inet:ip-address;
        description
          "Sham link remote address.";
      }
    }
    leaf packet-type {
      type packet-type;
      description
        "OSPF packet type.";
    }
  }

  notification lsdb-approaching-overflow {
    description
      "This notification is sent when the number of LSAs
       in the router's link state database has exceeded
       ninety percent of the ext-lsdb-limit.";
    uses notification-instance-hdr;
    leaf ext-lsdb-limit {
      type uint32;
      description
        "The maximum number of non-default AS-external LSAs
         entries that can be stored in the link state database.";
    }
  }

  notification lsdb-overflow {
    description
      "This notification is sent when the number of LSAs
       in the router's link state database has exceeded
       ext-lsdb-limit.";
    uses notification-instance-hdr;
    leaf ext-lsdb-limit {
      type uint32;
      description
        "The maximum number of non-default AS-external LSAs
         entries that can be stored in the link state database.";
    }
  }

  notification nssa-translator-status-change {
    description
      "This notification is sent when there is a change
       in the router's ability to translate OSPF NSSA LSAs
       OSPF AS-External LSAs.";
    uses notification-instance-hdr;
    leaf area-id {
      type uint32;
      description
        "Area ID.";
    }
    leaf status {
      type nssa-translator-state-type;
      description
        "NSSA translator status.";
    }
  }

  notification restart-status-change {
    description
      "This notification is sent when the graceful restart
       state for the router has changed.";
    uses notification-instance-hdr;
    leaf status {
      type restart-status-type;
      description
        "Restart status.";
    }
    leaf restart-interval {
      type uint16 {
        range "1..1800";
      }
      units "seconds";
      default "120";
      description
        "Restart interval.";
    }
    leaf exit-reason {
      type restart-exit-reason-type;
      description
        "Restart exit reason.";
    }
  }

  grouping ospf-grp {
    container ospf {
      description
        "OSPF.";
      container all-instances-inherit {
        if-feature "instance-inheritance";
        description
          "Inheritance support to all instances.";
        container area {
          description
            "Area config to be inherited by all areas in
             all instances.";
        }
        container interface {
          description
            "Interface config to be inherited by all interfaces
             in all instances.";
        }
      }
      leaf operation-mode {
        type identityref {
          base operation-mode;
        }
        default "org-openroadm-ospf:ships-in-the-night";
        description
          "OSPF operation mode.";
      }
      list instance {
        key "routing-instance af";
        description
          "An OSPF routing protocol instance.";
        leaf routing-instance {
          type org-openroadm-routing:routing-instance-ref;
          description
            "For protocol centric model, which is supported in
             default-instance only, this could reference any layer 3
             routing-instance.
             For routing-instance centric model, must reference the
             enclosing routing-instance.";
        }
        leaf af {
          type identityref {
            base org-openroadm-routing:address-family;
          }
          description
            "Address-family of the instance.";
        }
        uses instance-config;
        container all-areas-inherit {
          if-feature "area-inheritance";
          description
            "Inheritance for all areas.";
          container area {
            description
              "Area config to be inherited by all areas.";
          }
          container interface {
            description
              "Interface config to be inherited by all interfaces
               in all areas.";
          }
        }
        list area {
          key "area-id";
          description
            "List of ospf areas";
          leaf area-id {
            type yang:dotted-quad;
            description
              "Area ID.";
          }
          uses area-config;
          container all-interfaces-inherit {
            if-feature "interface-inheritance";
            description
              "Inheritance for all interfaces";
            container interface {
              description
                "Interface config to be inherited by all
                 interfaces.";
            }
          }
          list virtual-link {
            when "../area-id != '0' and ../area-type = 'normal'" {
              description
                "Transit area must be non-backbone normal area.";
            }
            key "router-id";
            description
              "OSPF virtual link";
            leaf router-id {
              type yang:dotted-quad;
              description
                "Virtual link router ID.";
            }
            uses interface-common-config;
          }
          list interface {
            key "interface";
            description
              "List of OSPF interfaces.";
            leaf interface {
              type org-openroadm-device:interface-ref;
              description
                "Interface.";
            }
            uses interface-config;
          }
        }
      }
    }
    description
      "Grouping for OSPF";
  }

  augment "/org-openroadm-device:org-openroadm-device/org-openroadm-routing:routing/org-openroadm-routing:routing-instance/org-openroadm-routing:routing-protocols/org-openroadm-routing:routing-protocol" {
    when "org-openroadm-routing:type = 'org-openroadm-ospf:ospfv2' or org-openroadm-routing:type = 'org-openroadm-ospf:ospfv3'" {
      description
        "This augment is only valid for a routing protocol instance
         of OSPF (type 'ospfv2' or 'ospfv3').";
    }
    description
      "OSPF augmentation.";
    uses ospf-grp;
  }

  augment "/org-openroadm-device:org-openroadm-device/org-openroadm-routing:routing/org-openroadm-routing:routing-instance/org-openroadm-routing:routing-protocols/org-openroadm-routing:routing-protocol/org-openroadm-ospf:ospf/org-openroadm-ospf:instance" {
    when "../../org-openroadm-routing:type = 'org-openroadm-ospf:ospfv2' or
          ../../org-openroadm-routing:type = 'org-openroadm-ospf:ospfv3'" {
        description
          "This augment is only valid for OSPF
           (type 'ospfv2' or 'ospfv3').";
    }
    if-feature "multi-topology";
    description
      "OSPF multi-topology routing-protocol augmentation.";
  }

  grouping topology-cost-grp {
    list topology {
      key "name";
      description
        "OSPF interface topology.";
      leaf name {
        type leafref {
          path "/org-openroadm-device:org-openroadm-device/org-openroadm-routing:routing/org-openroadm-routing:routing-instance/org-openroadm-routing:ribs/org-openroadm-routing:rib/org-openroadm-routing:name";
        }
        description
          "One of the topology enabled on this interface";
      }
      leaf cost {
        type uint32;
        description
          "Interface cost for this topology";
      }
    }
    description
      "Grouping for topology cost";
  }

  augment "/org-openroadm-device:org-openroadm-device/org-openroadm-routing:routing/org-openroadm-routing:routing-instance/org-openroadm-routing:routing-protocols/org-openroadm-routing:routing-protocol/org-openroadm-ospf:ospf/org-openroadm-ospf:instance/org-openroadm-ospf:area/org-openroadm-ospf:interface" {
    when "../../../../org-openroadm-routing:type = 'org-openroadm-ospf:ospfv2'" {
      description
        "This augment is only valid for OSPFv2.";
    }
    if-feature "org-openroadm-ospf:multi-topology";
    description
      "OSPF multi-topology interface augmentation.";
    uses topology-cost-grp;
  }

  grouping ospf-lsa-grp {
    container ospf {
      description
        "OSPF";
      list instance {
        key "routing-instance af";
        description
          "An OSPF routing protocol instance.";
        leaf routing-instance {
          type org-openroadm-routing:routing-instance-ref;
          description
            "For protocol centric model, which is supported in
             default-instance only, this could reference any layer 3
             routing-instance.
             For routing-instance centric model, must reference the
             enclosing routing-instance.";
        }
        leaf af {
          type identityref {
            base org-openroadm-routing:address-family;
          }
          description
            "Address-family of the instance.";
        }
        uses instance-operation;
        list area {
          key "area-id";
          description
            "List of OSPF areas";
          leaf area-id {
            type area-id-type;
            description
              "Area ID.";
          }
          list interface {
            key "interface";
            description
              "List of OSPF interfaces.";
            leaf interface {
              type org-openroadm-device:interface-ref;
              description
                "Interface.";
            }
            uses interface-operation;
            list neighbor {
              key "neighbor-id";
              description
                "List of OSPF neighbors.";
              leaf neighbor-id {
                type inet:ipv4-address;
                description
                  "Neighbor ID.";
              }
              uses neighbor-operation;
            }
            list link-scope-lsas {
              when "../../../../../org-openroadm-routing:type = 'ospfv3'" {
                description
                  "Link scope LSA only exists in OSPFv3.";
              }
              key "lsa-type";
              description
                "List OSPF link scope LSA databases";
              leaf lsa-type {
                type uint8;
                description
                  "OSPF link scope LSA type.";
              }
              list link-scope-lsa {
                key "lsa-id adv-router";
                description
                  "List of OSPF link scope LSAs";
                uses lsa-key;
                uses link-scope-lsa;
              }
            }
          }
          list area-scope-lsas {
            key "lsa-type";
            description
              "List OSPF area scope LSA databases";
            leaf lsa-type {
              type uint8;
              description
                "OSPF area scope LSA type.";
            }
            list area-scope-lsa {
              key "lsa-id adv-router";
              description
                "List of OSPF area scope LSAs";
              uses lsa-key;
              uses area-scope-lsa;
            }
          }
        }
        list as-scope-lsas {
          key "lsa-type";
          description
            "List OSPF AS scope LSA databases";
          leaf lsa-type {
            type uint8;
            description
              "OSPF AS scope LSA type.";
          }
          list as-scope-lsa {
            key "lsa-id adv-router";
            description
              "List of OSPF AS scope LSAs";
            uses lsa-key;
            uses as-scope-lsa;
          }
        }
      }
    }
    description
      "Grouping for ospf lsa";
  }

  augment "/org-openroadm-device:org-openroadm-device/org-openroadm-routing:routing-state/org-openroadm-routing:routing-instance/org-openroadm-routing:routing-protocols/org-openroadm-routing:routing-protocol" {
    when "org-openroadm-routing:type = 'org-openroadm-ospf:ospfv2' or org-openroadm-routing:type = 'org-openroadm-ospf:ospfv3'" {
      description
        "This augment is only valid for a routing protocol instance
         of type 'ospfv2' or 'ospfv3'.";
    }
    description
      "OSPF configuration.";
    uses ospf-lsa-grp;
  }

  grouping topology-area-grp {
    list topology {
      key "name";
      description
        "OSPF topology.";
      leaf name {
        type leafref {
          path "/org-openroadm-device:org-openroadm-device/org-openroadm-routing:routing/org-openroadm-routing:routing-instance/org-openroadm-routing:ribs/org-openroadm-routing:rib/org-openroadm-routing:name";
        }
        description
          "RIB";
      }
      list area {
        key "area-id";
        description
          "List of ospf areas";
        leaf area-id {
          type area-id-type;
          description
            "Area ID.";
        }
      }
    }
    description
      "Grouping for topology area";
  }

  augment "/org-openroadm-device:org-openroadm-device/org-openroadm-routing:routing-state/org-openroadm-routing:routing-instance/org-openroadm-routing:routing-protocols/org-openroadm-routing:routing-protocol/org-openroadm-ospf:ospf/org-openroadm-ospf:instance" {
    when "../../org-openroadm-routing:type = 'org-openroadm-ospf:ospfv2'" {
      description
        "This augment is only valid for OSPFv2.";
    }
    if-feature "multi-topology";
    description
      "OSPF multi-topology routing-protocol augmentation.";
    uses topology-area-grp;
  }

  grouping topology-grp {
    list topology {
      key "name";
      description
        "OSPF interface topology.";
      leaf name {
        type leafref {
          path "/org-openroadm-device:org-openroadm-device/org-openroadm-routing:routing/org-openroadm-routing:routing-instance/org-openroadm-routing:ribs/org-openroadm-routing:rib/org-openroadm-routing:name";
        }
        description
          "One of the topology enabled on this interface";
      }
    }
    description
      "Grouping for topology";
  }

  augment "/org-openroadm-device:org-openroadm-device/org-openroadm-routing:routing-state/org-openroadm-routing:routing-instance/org-openroadm-routing:routing-protocols/org-openroadm-routing:routing-protocol/org-openroadm-ospf:ospf/org-openroadm-ospf:instance/org-openroadm-ospf:area/org-openroadm-ospf:interface" {
    when "../../../../org-openroadm-routing:type = 'org-openroadm-ospf:ospfv2'" {
      description
        "This augment is only valid for OSPFv2.";
    }
    if-feature "org-openroadm-ospf:multi-topology";
    description
      "OSPF multi-topology interface augmentation.";
    uses topology-grp;
  }
}