module openconfig-if-types {

    yang-version 1;

    namespace
      "http://openconfig.net/yang/openconfig-if-types";

    prefix oc-ift;

    import openconfig-extensions {
      prefix oc-ext;
    }

    organization "OpenConfig working group";

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

    description
      "This module contains a set of interface type definitions that
are used across OpenConfig models. These are generally physical
or logical interfaces, distinct from hardware ports (which are
described by the OpenConfig platform model).";

    revision "2018-11-21" {
      description
        "Add OpenConfig module metadata extensions.";
      reference
        "0.2.1";

    }

    revision "2018-01-05" {
      description
        "Add tunnel types into the INTERFACE_TYPE identity.";
      reference
        "0.2.0";

    }

    revision "2016-11-14" {
      description "Initial version";
      reference
        "0.1.0";

    }

    oc-ext:openconfig-version "0.2.1";
    oc-ext:regexp-posix;
    oc-ext:catalog-organization "openconfig";
    oc-ext:origin "openconfig";

    identity INTERFACE_TYPE {
      description
        "Base identity from which interface types are derived.";
    }

    identity IF_ETHERNET {
      base INTERFACE_TYPE;
      description
        "Ethernet interfaces based on IEEE 802.3 standards, as well
as FlexEthernet";
      reference
        "IEEE 802.3-2015 - IEEE Standard for Ethernet
        OIF Flex Ethernet Implementation Agreement 1.0";

    }

    identity IF_AGGREGATE {
      base INTERFACE_TYPE;
      description
        "An aggregated, or bonded, interface forming a
Link Aggregation Group (LAG), or bundle, most often based on
the IEEE 802.1AX (or 802.3ad) standard.";
      reference
        "IEEE 802.1AX-2008";

    }

    identity IF_LOOPBACK {
      base INTERFACE_TYPE;
      description
        "A virtual interface designated as a loopback used for
various management and operations tasks.";
    }

    identity IF_ROUTED_VLAN {
      base INTERFACE_TYPE;
      description
        "A logical interface used for routing services on a VLAN.
Such interfaces are also known as switch virtual interfaces
(SVI) or integrated routing and bridging interfaces (IRBs).";
    }

    identity IF_SONET {
      base INTERFACE_TYPE;
      description "SONET/SDH interface";
    }

    identity IF_TUNNEL_GRE4 {
      base INTERFACE_TYPE;
      description
        "A GRE tunnel over IPv4 transport.";
    }

    identity IF_TUNNEL_GRE6 {
      base INTERFACE_TYPE;
      description
        "A GRE tunnel over IPv6 transport.";
    }
  }  // module openconfig-if-types