ietf-te-mpls-topology.yang

module ietf-te-mpls-topology {
  yang-version 1.1;
  namespace "urn:ietf:params:xml:ns:yang:ietf-te-mpls-topology";
  prefix tet-mpls;

  import ietf-network {
    prefix nw;
    reference
      "RFC 8345: A YANG Data Model for Network Topologies";
  }

  import ietf-network-topology {
    prefix nt;
    reference
      "RFC 8345: A YANG Data Model for Network Topologies";
  }

  import ietf-te-topology {
    prefix tet;
    reference
      "RFC 8795: YANG Data Model for Traffic Engineering
       (TE) Topologies";
  }

  import ietf-te-topology-packet {
    prefix tet-pkt;
    reference
      "RFC YYYY: YANG Data Model for Layer 3 TE Topologies";
  }
  // RFC Editor: replace YYYY with the actual RFC number assigned 
  // to the RFC once draft-ietf-teas-yang-l3-te-topo 
  // becomes an RFC and remove this note.

  import ietf-mpls-te-types {
    prefix mpls-te-types;
    reference
      "RFC XXXX: A YANG Data Model for MPLS-TE Topology";
  }
  // RFC Editor: replace XXXX with the actual RFC number assigned 
  // to the RFC once this draft 
  // becomes an RFC and remove this note.

  organization
    "Internet Engineering Task Force (IETF) TEAS WG";
  contact
    "WG Web:   <https://datatracker.ietf.org/wg/teas/>
     WG List:  <mailto:teas@ietf.org>

     Editor:   Italo Busi
               <mailto:italo.busi@huawei.com>

     Editor:   Aihua Guo
               <mailto:aihuaguo.ietf@gmail.com>

     Editor:   Xufeng Liu
               <mailto:xufeng.liu.ietf@gmail.com>

     Editor:   Tarek Saad
               <mailto:tsaad.net@gmail.com>

     Editor:   Rakesh Gandhi
               <mailto:rgandhi@cisco.com>";

  description
    "This module defines a YANG data model for representing, 
    retrieving, and manipulating MPLS-TE network topologies.

    This module defines MPLS-TE technology-specific augmentations 
    to the generic Packet TE topology module 
    (ietf-te-topology-packet).

    Copyright (c) 2022 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 Revised
    BSD License set forth in Section 4.c of the IETF Trust's
    Legal Provisions Relating to IETF Documents
    (https://trustee.ietf.org/license-info).
    
    This version of this YANG module is part of RFC XXXX; see
    the RFC itself for full legal notices.";

  revision 2023-10-13 {
    description
      "Initial Version";
    reference
      "RFC XXXX: A YANG Data Model for MPLS-TE Topology";
  }
  // RFC Editor: replace XXXX with the actual RFC number assigned 
  // to the RFC once this draft 
  // becomes an RFC, update date information and remove this note.

  /*
   * Augmentations
   */

  augment "/nw:networks/nw:network/nw:network-types/"
        + "tet:te-topology/tet-pkt:packet" {
    description
      "Augment network types to include MPLS-TE Topology Type";
    container mpls-topology {
      presence
        "Indicates an MPLS-TE Topology Type.";
      description
        "Its presence indicates an MPLS-TE Topology";
    }
  }

  augment "/nw:networks/nw:network/nt:link/tet:te" {
    when "../../nw:network-types/tet:te-topology/"
       + "tet-pkt:packet/tet-mpls:mpls-topology"  {
      description
        "Augment MPLS-TE Topology.";
    }
    description
      "Augment TE Link.";

    leaf load-balancing-type {
      type mpls-te-types:load-balancing-type;
      default 'per-flow';
      description
        "Indicates the type of load-balancing (per-flow or per-LSP)
         performed by the bundled TE Link.
         
         This leaf is not present when the TE Link is not bundled.";
    }  // leaf load-balancing-type
  }

  augment "/nw:networks/nw:network/nw:node/nt:termination-point/"
        + "tet:te" {
    when "../../../nw:network-types/tet:te-topology/"
       + "tet-pkt:packet/tet-mpls:mpls-topology" {
      description "Augment MPLS-TE Topology.";
    }
    description "Augment LTP.";
    
    leaf uhp-incapable {
      type empty;
      config false;
      description
        "When present, indicates that the LTP is not capable to
         support Ultimate Hop Popping (UHP).";
    }   // leaf uhp-incapable
  }
}