module openconfig-if-ip {

    yang-version 1;

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

    prefix oc-ip;

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

    organization "OpenConfig working group";

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

    description
      "This model defines data for managing configuration and
    operational state on IP (IPv4 and IPv6) interfaces.

    This model reuses data items defined in the IETF YANG model for
    interfaces described by RFC 7277 with an alternate structure
    (particularly for operational state data) and with
    additional configuration items.

    Portions of this code were derived from IETF RFC 7277.
    Please reproduce this note if possible.

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

    }

    revision "2017-12-21" {
      description
        "Added IPv6 router advertisement configuration.";
      reference
        "2.1.0";

    }

    revision "2017-07-14" {
      description
        "Added Ethernet/IP state data; Add dhcp-client;
      migrate to OpenConfig types modules; Removed or
      renamed opstate values";
      reference
        "2.0.0";

    }

    revision "2017-04-03" {
      description "Update copyright notice.";
      reference
        "1.1.1";

    }

    revision "2016-12-22" {
      description
        "Fixes to Ethernet interfaces model";
      reference
        "1.1.0";

    }

    oc-ext:openconfig-version "2.3.0";

    typedef ip-address-origin {
      type enumeration {
        enum "OTHER" {
          value 0;
          description
            "None of the following.";
        }
        enum "STATIC" {
          value 1;
          description
            "Indicates that the address has been statically
          configured - for example, using NETCONF or a Command Line
          Interface.";
        }
        enum "DHCP" {
          value 2;
          description
            "Indicates an address that has been assigned to this
          system by a DHCP server.";
        }
        enum "LINK_LAYER" {
          value 3;
          description
            "Indicates an address created by IPv6 stateless
          autoconfiguration that embeds a link-layer address in its
          interface identifier.";
        }
        enum "RANDOM" {
          value 4;
          description
            "Indicates an address chosen by the system at
          random, e.g., an IPv4 address within 169.254/16, an
          RFC 4941 temporary address, or an RFC 7217 semantically
          opaque address.";
          reference
            "RFC 4941: Privacy Extensions for Stateless Address
            	 Autoconfiguration in IPv6
             RFC 7217: A Method for Generating Semantically Opaque
            	 Interface Identifiers with IPv6 Stateless
            	 Address Autoconfiguration (SLAAC)";

        }
      }
      description
        "The origin of an address.";
    }

    typedef neighbor-origin {
      type enumeration {
        enum "OTHER" {
          value 0;
          description
            "None of the following.";
        }
        enum "STATIC" {
          value 1;
          description
            "Indicates that the mapping has been statically
          configured - for example, using NETCONF or a Command Line
          Interface.";
        }
        enum "DYNAMIC" {
          value 2;
          description
            "Indicates that the mapping has been dynamically resolved
        using, e.g., IPv4 ARP or the IPv6 Neighbor Discovery
        protocol.";
        }
      }
      description
        "The origin of a neighbor entry.";
    }
  }  // module openconfig-if-ip