module openconfig-if-ip-ext {

    yang-version 1;

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

    prefix oc-ip-ext;

    import openconfig-interfaces {
      prefix oc-if;
    }
    import openconfig-if-ip {
      prefix oc-ip;
    }
    import openconfig-extensions {
      prefix oc-ext;
    }

    organization "OpenConfig working group";

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

    description
      "This module adds extensions to the base IP configuration and
    operational state model to support additional use cases.";

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

    }

    oc-ext:openconfig-version "2.3.0";
  }  // module openconfig-if-ip-ext