module bbf-xpon-if-type {

    yang-version 1.1;

    namespace
      "urn:bbf:yang:bbf-xpon-if-type";

    prefix bbf-xponift;

    import bbf-if-type {
      prefix bbfift;
    }

    organization
      "Broadband Forum <https://www.broadband-forum.org>
Fiber Access Networks Work Area";

    contact
      "Comments or questions about this Broadband Forum YANG module
should be directed to <mailto:info@broadband-forum.org>.

Editor:      Joey Boyd, ADTRAN

Editor:      Igor Ternovsky, Broadcom

Editor:      Robert Peschi, Nokia

WA Director: Marta Seda, Calix

WA Director: Samuel Chen, Broadcom";

    description
      "This module contains a collection of YANG definitions for
supporting the Broadband Forum requirements on management of
ITU-T Passive Optical Network (PON) interfaces as defined in
ITU-T G.984.x, G.987.x, ITU-T G.989.x and ITU-T G.9807.x. As
such, this module is specific to access network equipment (e.g.,
BBF-specified Access Nodes and FTTdp DPUs).

Specifically, this module defines xPON interface types that are
needed for Broadband Forum aplications, but are not defined by
IANA.

Copyright (c) 2018-2020, Broadband Forum

Redistribution and use in source and binary forms, with or
without modification, are permitted provided that the following
conditions are met:

1. Redistributions of source code must retain the above copyright
   notice, this list of conditions and the following disclaimer.

2. Redistributions in binary form must reproduce the above
   copyright notice, this list of conditions and the following
   disclaimer in the documentation and/or other materials
   provided with the distribution.

3. Neither the name of the copyright holder nor the names of its
   contributors may be used to endorse or promote products
   derived from this software without specific prior written
   permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

The above license is used as a license under copyright only.
Please reference the Forum IPR Policy for patent licensing terms
<https://www.broadband-forum.org/ipr-policy>.

Any moral rights which are necessary to exercise under the above
license grant are also deemed granted under this license.

This version of this YANG module is part of TR-385i2; see
the TR itself for full legal notices.";

    revision "2020-10-13" {
      description
        "Issue 2.
* Approval Date:    2020-10-13.
* Publication Date: 2020-10-13.";
      reference
        "TR-385i2: ITU-T PON YANG Modules
        	<https://www.broadband-forum.org/technical/download/
        		 TR-385_Issue-2.pdf>";

    }

    revision "2019-02-25" {
      description
        "Initial revision.
* Approval Date:    2019-02-25.
* Publication Date: 2019-02-25.";
      reference
        "TR-385: ITU-T PON YANG Modules
        	<https://www.broadband-forum.org/technical/download/
        		 TR-385.pdf>";

    }


    identity bbf-xpon-interface-type {
      base bbfift:bbf-interface-type;
      description
        "This identity is used as a base for all xPON interface types
defined by the BBF that are not in the 'ifType definitions'
registry maintained by IANA.";
    }

    identity channel-group {
      base bbf-xpon-interface-type;
      description
        "A set of channel-pairs carried over a common fiber.";
    }

    identity channel-partition {
      base bbf-xpon-interface-type;
      description
        "Any of the operator-specified non-overlapping subsets of Time
Wavelength Division Multiplexing (TWDM) or Point-to-Point (PtP)
Wavelength Division Multiplexing (WDM) channels in an NG-PON2
system.";
    }

    identity channel-pair {
      base bbf-xpon-interface-type;
      description
        "A set of one downstream wavelength channel and one upstream
wavelength channel that provides connectivity between an
Optical Line Termination (OLT) and one or more Optical Network
Units (ONU).";
    }

    identity channel-termination {
      base bbf-xpon-interface-type;
      description
        "A logical function that resides at the Optical Line Termination
(OLT) network element and terminates a single Point-to-Point
(PtP) Wavelength Division Multiplexing (WDM) channel in a PtP
WDM system or a single Time Wavelength Division Multiplexing
(TWDM) channel in a TWDM system.";
    }

    identity ani {
      base bbf-xpon-interface-type;
      description
        "The Access Network Interface (ANI) located on the Optical
Network Unit (ONU).";
    }

    identity v-ani {
      base bbf-xpon-interface-type;
      description
        "A virtual representation of the Access Network Interface (vANI)
on the Optical Line Termination (OLT).";
    }

    identity onu-v-enet {
      base bbf-xpon-interface-type;bbfift:ethernet-like;
      description
        "Base type for ONU-vENET interfaces. The ONU-vENET interfaces
are virtual interfaces which carry Ethernet frames, which
belong to the Optical Network Unit (ONU) and which are facing
the xPON side of the ONU i.e. facing the Optical Line
Termination (OLT).

ONU-vENET are virtual interfaces in the sense that they do not
directly refer to a physical port of an ONU. Instead, ONU-vENET
interfaces have the Access Network Interfaces (ANI) of the ONU
as underlying interface. ONU-vENET are NOT facing the user side
of the ONU.

An ONU-vENET can be used as the xPON side Ethernet
aggregation interface of an ONU which performs Ethernet
traffic aggregation from several user-facing interfaces.

An ONU-vENET can also be used to support an IP host in the
ONU.";
    }

    identity olt-v-enet {
      base bbf-xpon-interface-type;bbfift:ethernet-like;
      description
        "Base type for olt-v-enet interfaces. The OLT-vENET interfaces
are virtual interfaces which carry Ethernet frames, which
belong to the Optical Line Termination (OLT) and which are
facing the xPON side of the OLT i.e. facing the Optical Network
Unit (ONU).

OLT-vENET are virtual interfaces in the sense that they do not
directly refer to a physical port of an OLT. Instead, OLT-vENET
interfaces have the virtual Access Network Interface (vANI)
corresponding to a specific ONU as underlying interface.
In the general case, an OLT-vENET 1-1 corresponds to a
counter-part ONU-vENET interface on the ONU.

In the specific case of a TR-156 deployment scheme, there is
typically no need for the ONU to instanciate ONU-vENET
interfaces for subscriber traffic: in that case OLT-vENET
interfaces can directly 1-1 correspond to individual user
facing interface of the ONU, being physical (per TR-156) or
virtual (per TR-167).";
      reference
        "BBF TR-156; BBF TR-167";

    }

    identity onu-v-vrefpoint {
      base bbf-xpon-interface-type;bbfift:ethernet-like;
      description
        "Base type for ONU-vUNI interfaces. The ONU-vUNI interface is a
virtual interface which carry Ethernet frames, which belong to
the Optical Network Unit (ONU) and which is facing the user.

It is intended for use as ONU 'Virtual V reference point'
defined in TR-167 (ref TR-167, Section 4 and 4.1). ONU-vUNI are
virtual interfaces in the sense that they do not refer to a
physical port of an ONU.

ONU-vUNI are virtual equivalents of the physical interfaces at
the ONU U reference point defined in TR-156 (ref. TR-156,
Section 4).";
      reference
        "BBF TR-156; BBF TR-167";

    }
  }  // module bbf-xpon-if-type