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Versions: (draft-liu-teas-yang-l3-te-topo) 00 01 02

Network Working Group                                             X. Liu
Internet-Draft                                            Volta Networks
Intended status: Standards Track                              I. Bryskin
Expires: January 2, 2019                             Huawei Technologies
                                                               V. Beeram
                                                        Juniper Networks
                                                                 T. Saad
                                                       Cisco Systems Inc
                                                                 H. Shah
                                                                   Ciena
                                                     O. Gonzalez de Dios
                                                              Telefonica
                                                            July 1, 2018


               YANG Data Model for Layer 3 TE Topologies
                   draft-ietf-teas-yang-l3-te-topo-02

Abstract

   This document defines a YANG data model for layer 3 traffic
   engineering topologies.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at https://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on January 2, 2019.

Copyright Notice

   Copyright (c) 2018 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (https://trustee.ietf.org/license-info) in effect on the date of



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   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   3
     1.2.  Tree Diagrams . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Modeling Considerations for L3 TE Topologies  . . . . . . . .   3
     2.1.  Relationship Between Layer 3 Topology and TE topology . .   3
     2.2.  Relationship Modeling . . . . . . . . . . . . . . . . . .   4
       2.2.1.  Topology Referencing  . . . . . . . . . . . . . . . .   4
       2.2.2.  Node Referencing  . . . . . . . . . . . . . . . . . .   4
       2.2.3.  Link Termination Point Referencing  . . . . . . . . .   4
       2.2.4.  Link Referencing  . . . . . . . . . . . . . . . . . .   5
     2.3.  Topology Type Modeling  . . . . . . . . . . . . . . . . .   5
   3.  Packet Switching Technology Extensions  . . . . . . . . . . .   5
     3.1.  Technology Specific Link Attributes . . . . . . . . . . .   5
     3.2.  Performance Metric  . . . . . . . . . . . . . . . . . . .   6
   4.  Model Structure . . . . . . . . . . . . . . . . . . . . . . .   6
     4.1.  Layer 3 TE Topology Module  . . . . . . . . . . . . . . .   6
     4.2.  Packet Switching TE Topology Module . . . . . . . . . . .   7
   5.  YANG Modules  . . . . . . . . . . . . . . . . . . . . . . . .  21
     5.1.  Layer 3 TE Topology Module  . . . . . . . . . . . . . . .  21
     5.2.  Packet Switching TE Topology Module . . . . . . . . . . .  26
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  31
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .  33
   8.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  35
     8.1.  Normative References  . . . . . . . . . . . . . . . . . .  35
     8.2.  Informative References  . . . . . . . . . . . . . . . . .  37
   Appendix A.  Companion YANG Model for Non-NMDA Compliant
                Implementations  . . . . . . . . . . . . . . . . . .  38
     A.1.  Layer 3 TE Topology State Module  . . . . . . . . . . . .  38
     A.2.  Packet Switching TE Topology State Module . . . . . . . .  41
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  46

1.  Introduction

   This document defines a YANG [RFC7950] data model for describing the
   relationship between a layer 3 network topology [RFC8346] and a TE
   topology [I-D.ietf-teas-yang-te-topo].

   When traffic engineering is enabled on a layer 3 network topology,
   there will be a corresponding TE topology.  The TE topology may or



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   may not be congruent to the layer 3 network topology.  When such a
   congruent TE topology exists, there will be a one-to-one association
   between the one modeling element in the layer 3 topology to another
   element in the TE topology.  When such a congruent TE topology does
   not exist, the association will not be one-to-one.  This YANG data
   model allows both cases.

1.1.  Terminology

   The keywords "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
   "OPTIONAL" in this document are to be interpreted as described in BCP
   14, [RFC2119].

   The following terms are defined in [RFC7950] and are not redefined
   here:

   o  augment

   o  data model

   o  data node

1.2.  Tree Diagrams

   Tree diagrams used in this document follow the notation defined in
   [RFC8340].

2.  Modeling Considerations for L3 TE Topologies

2.1.  Relationship Between Layer 3 Topology and TE topology

   In general, layer 3 network topology model and TE topology model can
   be used independently.  When traffic engineering is enabled on a
   layer 3 network topology, there will be associations between objects
   in layer 3 network topologies and objects in TE topologies.  The
   properties of these relations are:

   o  The associations are between objects of the same class, i.e. node
      to node or link to link.

   o  The multiplicity of such an association is: 0..1 to 0..1.  An
      object in a layer 3 network may have zero or one associated object
      in the corresponding TE network.







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2.2.  Relationship Modeling

   YANG data type leafref is used to model the association relationship
   between a layer 3 network topology and a TE topology.  YANG must
   statements are used to enforce the referenced objects are in the
   topologies of proper type.

2.2.1.  Topology Referencing

   When TE is enabled on a layer 3 network topology, if the TE topology
   is not congruent to the layer 3 network topology, the layer 3 network
   topology will have a reference to the corresponding TE topology.
   Such a reference is modeled as follows:

   augment /nw:networks/nw:network/l3t:l3-topology-attributes:
     +--rw l3-te-topology-attributes
        +--rw network-ref?   -> /nw:networks/network/network-id

   If the TE topology is congruent to the layer 3 network topology, the
   above reference can still be used to specified TE paramenters defined
   in the TE topology model.

2.2.2.  Node Referencing

   When TE is enabled on a layer 3 network topology, if the TE topology
   is not congruent to the layer 3 network topology, a layer 3 network
   node may have a reference to the corresponding TE node.  Such a
   reference is modeled as follows:

   augment /nw:networks/nw:network/nw:node/l3t:l3-node-attributes:
     +--rw l3-te-node-attributes
        +--rw node-ref?      leafref
        +--rw network-ref?   -> /nw:networks/network/network-id

2.2.3.  Link Termination Point Referencing

   When TE is enabled on a layer 3 network topology, if the TE topology
   is not congruent to the layer 3 network topology, a layer 3 link
   termination point may have a reference to the corresponding TE link
   termination point.  Such a reference is modeled as follows:

   augment /nw:networks/nw:network/nw:node/nt:termination-point
             /l3t:l3-termination-point-attributes:
     +--rw l3-te-tp-attributes
        +--rw tp-ref?        leafref
        +--rw node-ref?      leafref
        +--rw network-ref?   -> /nw:networks/network/network-id




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2.2.4.  Link Referencing

   When TE is enabled on a layer 3 network topology, if the TE topology
   is not congruent to the layer 3 network topology, a layer 3 link may
   have a reference to the corresponding TE link.  Such a reference is
   modeled as follows:

   augment /nw:networks/nw:network/nt:link/l3t:l3-link-attributes:
     +--rw l3-te-link-attributes
        +--rw link-ref?      leafref
        +--rw network-ref?   -> /nw:networks/network/network-id

2.3.  Topology Type Modeling

   A new topology type is defined in this document, to indicate a
   topology that is a layer 3 topology with TE enabled.

   augment /nw:networks/nw:network/nw:network-types
             /l3t:l3-unicast-topology:
     +--rw l3-te!

3.  Packet Switching Technology Extensions

3.1.  Technology Specific Link Attributes

   The technology agnostic TE Topology model is augmented with packet
   switching specific link attributes:

   augment /nw:networks/tet:te/tet:templates/tet:link-template
             /tet:te-link-attributes
             /tet:interface-switching-capability:
     +--rw packet-switch-capable
        +--rw minimum-lsp-bandwidth?   rt-types:bandwidth-ieee-float32
        +--rw interface-mtu?           uint16
   augment /nw:networks/nw:network/nt:link/tet:te
             /tet:te-link-attributes
             /tet:interface-switching-capability:
     +--rw packet-switch-capable
        +--rw minimum-lsp-bandwidth?   rt-types:bandwidth-ieee-float32
        +--rw interface-mtu?           uint16
   augment /nw:networks/nw:network/nt:link/tet:te
             /tet:information-source-entry
             /tet:interface-switching-capability:
     +--ro packet-switch-capable
        +--ro minimum-lsp-bandwidth?   rt-types:bandwidth-ieee-float32
        +--ro interface-mtu?           uint16





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3.2.  Performance Metric

   [RFC7471], [RFC7810] and [RFC7823] specify TE performance metric
   parameters and their usage.  The packet switching augmentations
   specified in this moducment support such a capability, which can be
   conditional enabled by a YANG feature "te-performance-metric".

   augment /nw:networks/nw:network/nw:node/tet:te
             /tet:te-node-attributes/tet:connectivity-matrices:
     +--rw performance-metric
        +--rw measurement
        |     ......
        +--rw normality
        |     ......
        +--rw throttle
              ......

   Such an augmentation has been applied to:

   o  Connectivity matrices container

   o  Connectivity matrix entry

   o  Local ink connectivities container

   o  Local ink connectivity entry

   o  TE link attributes containr in a TE link template

   o  TE link attributes containr in a TE link

   o  TE link attributes containr in a TE link

   o  Information source entry in a TE link

4.  Model Structure

4.1.  Layer 3 TE Topology Module

   The model tree structure of the layer 3 TE topology module is as
   shown below:










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   module: ietf-l3-te-topology
     augment /nw:networks/nw:network/nw:network-types
               /l3t:l3-unicast-topology:
       +--rw l3-te!
     augment /nw:networks/nw:network/l3t:l3-topology-attributes:
       +--rw l3-te-topology-attributes
          +--rw network-ref?   -> /nw:networks/network/network-id
     augment /nw:networks/nw:network/nw:node/l3t:l3-node-attributes:
       +--rw l3-te-node-attributes
          +--rw node-ref?      leafref
          +--rw network-ref?   -> /nw:networks/network/network-id
     augment /nw:networks/nw:network/nw:node/nt:termination-point
               /l3t:l3-termination-point-attributes:
       +--rw l3-te-tp-attributes
          +--rw tp-ref?        leafref
          +--rw node-ref?      leafref
          +--rw network-ref?   -> /nw:networks/network/network-id
     augment /nw:networks/nw:network/nt:link/l3t:l3-link-attributes:
       +--rw l3-te-link-attributes
          +--rw link-ref?      leafref
          +--rw network-ref?   -> /nw:networks/network/network-id


4.2.  Packet Switching TE Topology Module

   This is an augmentation to base TE topology model.


   module: ietf-te-topology-packet
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:te-node-attributes/tet:connectivity-matrices:
       +--rw performance-metric
          +--rw measurement
          |  +--rw unidirectional-delay?                 uint32
          |  +--rw unidirectional-min-delay?             uint32
          |  +--rw unidirectional-max-delay?             uint32
          |  +--rw unidirectional-delay-variation?       uint32
          |  +--rw unidirectional-packet-loss?           decimal64
          |  +--rw unidirectional-residual-bandwidth?
          |  |       rt-types:bandwidth-ieee-float32
          |  +--rw unidirectional-available-bandwidth?
          |  |       rt-types:bandwidth-ieee-float32
          |  +--rw unidirectional-utilized-bandwidth?
          |          rt-types:bandwidth-ieee-float32
          +--rw normality
          |  +--rw unidirectional-delay?
          |  |       te-types:performance-metric-normality
          |  +--rw unidirectional-min-delay?



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          |  |       te-types:performance-metric-normality
          |  +--rw unidirectional-max-delay?
          |  |       te-types:performance-metric-normality
          |  +--rw unidirectional-delay-variation?
          |  |       te-types:performance-metric-normality
          |  +--rw unidirectional-packet-loss?
          |  |       te-types:performance-metric-normality
          |  +--rw unidirectional-residual-bandwidth?
          |  |       te-types:performance-metric-normality
          |  +--rw unidirectional-available-bandwidth?
          |  |       te-types:performance-metric-normality
          |  +--rw unidirectional-utilized-bandwidth?
          |          te-types:performance-metric-normality
          +--rw throttle
             +--rw unidirectional-delay-offset?           uint32
             +--rw measure-interval?                      uint32
             +--rw advertisement-interval?                uint32
             +--rw suppression-interval?                  uint32
             +--rw threshold-out
             |  +--rw unidirectional-delay?                 uint32
             |  +--rw unidirectional-min-delay?             uint32
             |  +--rw unidirectional-max-delay?             uint32
             |  +--rw unidirectional-delay-variation?       uint32
             |  +--rw unidirectional-packet-loss?           decimal64
             |  +--rw unidirectional-residual-bandwidth?
             |  |       rt-types:bandwidth-ieee-float32
             |  +--rw unidirectional-available-bandwidth?
             |  |       rt-types:bandwidth-ieee-float32
             |  +--rw unidirectional-utilized-bandwidth?
             |          rt-types:bandwidth-ieee-float32
             +--rw threshold-in
             |  +--rw unidirectional-delay?                 uint32
             |  +--rw unidirectional-min-delay?             uint32
             |  +--rw unidirectional-max-delay?             uint32
             |  +--rw unidirectional-delay-variation?       uint32
             |  +--rw unidirectional-packet-loss?           decimal64
             |  +--rw unidirectional-residual-bandwidth?
             |  |       rt-types:bandwidth-ieee-float32
             |  +--rw unidirectional-available-bandwidth?
             |  |       rt-types:bandwidth-ieee-float32
             |  +--rw unidirectional-utilized-bandwidth?
             |          rt-types:bandwidth-ieee-float32
             +--rw threshold-accelerated-advertisement
                +--rw unidirectional-delay?                 uint32
                +--rw unidirectional-min-delay?             uint32
                +--rw unidirectional-max-delay?             uint32
                +--rw unidirectional-delay-variation?       uint32
                +--rw unidirectional-packet-loss?           decimal64



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                +--rw unidirectional-residual-bandwidth?
                |       rt-types:bandwidth-ieee-float32
                +--rw unidirectional-available-bandwidth?
                |       rt-types:bandwidth-ieee-float32
                +--rw unidirectional-utilized-bandwidth?
                        rt-types:bandwidth-ieee-float32
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:te-node-attributes/tet:connectivity-matrices
               /tet:connectivity-matrix:
       +--rw performance-metric
          +--rw measurement
          |  +--rw unidirectional-delay?                 uint32
          |  +--rw unidirectional-min-delay?             uint32
          |  +--rw unidirectional-max-delay?             uint32
          |  +--rw unidirectional-delay-variation?       uint32
          |  +--rw unidirectional-packet-loss?           decimal64
          |  +--rw unidirectional-residual-bandwidth?
          |  |       rt-types:bandwidth-ieee-float32
          |  +--rw unidirectional-available-bandwidth?
          |  |       rt-types:bandwidth-ieee-float32
          |  +--rw unidirectional-utilized-bandwidth?
          |          rt-types:bandwidth-ieee-float32
          +--rw normality
          |  +--rw unidirectional-delay?
          |  |       te-types:performance-metric-normality
          |  +--rw unidirectional-min-delay?
          |  |       te-types:performance-metric-normality
          |  +--rw unidirectional-max-delay?
          |  |       te-types:performance-metric-normality
          |  +--rw unidirectional-delay-variation?
          |  |       te-types:performance-metric-normality
          |  +--rw unidirectional-packet-loss?
          |  |       te-types:performance-metric-normality
          |  +--rw unidirectional-residual-bandwidth?
          |  |       te-types:performance-metric-normality
          |  +--rw unidirectional-available-bandwidth?
          |  |       te-types:performance-metric-normality
          |  +--rw unidirectional-utilized-bandwidth?
          |          te-types:performance-metric-normality
          +--rw throttle
             +--rw unidirectional-delay-offset?           uint32
             +--rw measure-interval?                      uint32
             +--rw advertisement-interval?                uint32
             +--rw suppression-interval?                  uint32
             +--rw threshold-out
             |  +--rw unidirectional-delay?                 uint32
             |  +--rw unidirectional-min-delay?             uint32
             |  +--rw unidirectional-max-delay?             uint32



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             |  +--rw unidirectional-delay-variation?       uint32
             |  +--rw unidirectional-packet-loss?           decimal64
             |  +--rw unidirectional-residual-bandwidth?
             |  |       rt-types:bandwidth-ieee-float32
             |  +--rw unidirectional-available-bandwidth?
             |  |       rt-types:bandwidth-ieee-float32
             |  +--rw unidirectional-utilized-bandwidth?
             |          rt-types:bandwidth-ieee-float32
             +--rw threshold-in
             |  +--rw unidirectional-delay?                 uint32
             |  +--rw unidirectional-min-delay?             uint32
             |  +--rw unidirectional-max-delay?             uint32
             |  +--rw unidirectional-delay-variation?       uint32
             |  +--rw unidirectional-packet-loss?           decimal64
             |  +--rw unidirectional-residual-bandwidth?
             |  |       rt-types:bandwidth-ieee-float32
             |  +--rw unidirectional-available-bandwidth?
             |  |       rt-types:bandwidth-ieee-float32
             |  +--rw unidirectional-utilized-bandwidth?
             |          rt-types:bandwidth-ieee-float32
             +--rw threshold-accelerated-advertisement
                +--rw unidirectional-delay?                 uint32
                +--rw unidirectional-min-delay?             uint32
                +--rw unidirectional-max-delay?             uint32
                +--rw unidirectional-delay-variation?       uint32
                +--rw unidirectional-packet-loss?           decimal64
                +--rw unidirectional-residual-bandwidth?
                |       rt-types:bandwidth-ieee-float32
                +--rw unidirectional-available-bandwidth?
                |       rt-types:bandwidth-ieee-float32
                +--rw unidirectional-utilized-bandwidth?
                        rt-types:bandwidth-ieee-float32
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:information-source-entry/tet:connectivity-matrices:
       +--ro performance-metric
          +--ro measurement
          |  +--ro unidirectional-delay?                 uint32
          |  +--ro unidirectional-min-delay?             uint32
          |  +--ro unidirectional-max-delay?             uint32
          |  +--ro unidirectional-delay-variation?       uint32
          |  +--ro unidirectional-packet-loss?           decimal64
          |  +--ro unidirectional-residual-bandwidth?
          |  |       rt-types:bandwidth-ieee-float32
          |  +--ro unidirectional-available-bandwidth?
          |  |       rt-types:bandwidth-ieee-float32
          |  +--ro unidirectional-utilized-bandwidth?
          |          rt-types:bandwidth-ieee-float32
          +--ro normality



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          |  +--ro unidirectional-delay?
          |  |       te-types:performance-metric-normality
          |  +--ro unidirectional-min-delay?
          |  |       te-types:performance-metric-normality
          |  +--ro unidirectional-max-delay?
          |  |       te-types:performance-metric-normality
          |  +--ro unidirectional-delay-variation?
          |  |       te-types:performance-metric-normality
          |  +--ro unidirectional-packet-loss?
          |  |       te-types:performance-metric-normality
          |  +--ro unidirectional-residual-bandwidth?
          |  |       te-types:performance-metric-normality
          |  +--ro unidirectional-available-bandwidth?
          |  |       te-types:performance-metric-normality
          |  +--ro unidirectional-utilized-bandwidth?
          |          te-types:performance-metric-normality
          +--ro throttle
             +--ro unidirectional-delay-offset?           uint32
             +--ro measure-interval?                      uint32
             +--ro advertisement-interval?                uint32
             +--ro suppression-interval?                  uint32
             +--ro threshold-out
             |  +--ro unidirectional-delay?                 uint32
             |  +--ro unidirectional-min-delay?             uint32
             |  +--ro unidirectional-max-delay?             uint32
             |  +--ro unidirectional-delay-variation?       uint32
             |  +--ro unidirectional-packet-loss?           decimal64
             |  +--ro unidirectional-residual-bandwidth?
             |  |       rt-types:bandwidth-ieee-float32
             |  +--ro unidirectional-available-bandwidth?
             |  |       rt-types:bandwidth-ieee-float32
             |  +--ro unidirectional-utilized-bandwidth?
             |          rt-types:bandwidth-ieee-float32
             +--ro threshold-in
             |  +--ro unidirectional-delay?                 uint32
             |  +--ro unidirectional-min-delay?             uint32
             |  +--ro unidirectional-max-delay?             uint32
             |  +--ro unidirectional-delay-variation?       uint32
             |  +--ro unidirectional-packet-loss?           decimal64
             |  +--ro unidirectional-residual-bandwidth?
             |  |       rt-types:bandwidth-ieee-float32
             |  +--ro unidirectional-available-bandwidth?
             |  |       rt-types:bandwidth-ieee-float32
             |  +--ro unidirectional-utilized-bandwidth?
             |          rt-types:bandwidth-ieee-float32
             +--ro threshold-accelerated-advertisement
                +--ro unidirectional-delay?                 uint32
                +--ro unidirectional-min-delay?             uint32



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                +--ro unidirectional-max-delay?             uint32
                +--ro unidirectional-delay-variation?       uint32
                +--ro unidirectional-packet-loss?           decimal64
                +--ro unidirectional-residual-bandwidth?
                |       rt-types:bandwidth-ieee-float32
                +--ro unidirectional-available-bandwidth?
                |       rt-types:bandwidth-ieee-float32
                +--ro unidirectional-utilized-bandwidth?
                        rt-types:bandwidth-ieee-float32
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:information-source-entry/tet:connectivity-matrices
               /tet:connectivity-matrix:
       +--ro performance-metric
          +--ro measurement
          |  +--ro unidirectional-delay?                 uint32
          |  +--ro unidirectional-min-delay?             uint32
          |  +--ro unidirectional-max-delay?             uint32
          |  +--ro unidirectional-delay-variation?       uint32
          |  +--ro unidirectional-packet-loss?           decimal64
          |  +--ro unidirectional-residual-bandwidth?
          |  |       rt-types:bandwidth-ieee-float32
          |  +--ro unidirectional-available-bandwidth?
          |  |       rt-types:bandwidth-ieee-float32
          |  +--ro unidirectional-utilized-bandwidth?
          |          rt-types:bandwidth-ieee-float32
          +--ro normality
          |  +--ro unidirectional-delay?
          |  |       te-types:performance-metric-normality
          |  +--ro unidirectional-min-delay?
          |  |       te-types:performance-metric-normality
          |  +--ro unidirectional-max-delay?
          |  |       te-types:performance-metric-normality
          |  +--ro unidirectional-delay-variation?
          |  |       te-types:performance-metric-normality
          |  +--ro unidirectional-packet-loss?
          |  |       te-types:performance-metric-normality
          |  +--ro unidirectional-residual-bandwidth?
          |  |       te-types:performance-metric-normality
          |  +--ro unidirectional-available-bandwidth?
          |  |       te-types:performance-metric-normality
          |  +--ro unidirectional-utilized-bandwidth?
          |          te-types:performance-metric-normality
          +--ro throttle
             +--ro unidirectional-delay-offset?           uint32
             +--ro measure-interval?                      uint32
             +--ro advertisement-interval?                uint32
             +--ro suppression-interval?                  uint32
             +--ro threshold-out



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             |  +--ro unidirectional-delay?                 uint32
             |  +--ro unidirectional-min-delay?             uint32
             |  +--ro unidirectional-max-delay?             uint32
             |  +--ro unidirectional-delay-variation?       uint32
             |  +--ro unidirectional-packet-loss?           decimal64
             |  +--ro unidirectional-residual-bandwidth?
             |  |       rt-types:bandwidth-ieee-float32
             |  +--ro unidirectional-available-bandwidth?
             |  |       rt-types:bandwidth-ieee-float32
             |  +--ro unidirectional-utilized-bandwidth?
             |          rt-types:bandwidth-ieee-float32
             +--ro threshold-in
             |  +--ro unidirectional-delay?                 uint32
             |  +--ro unidirectional-min-delay?             uint32
             |  +--ro unidirectional-max-delay?             uint32
             |  +--ro unidirectional-delay-variation?       uint32
             |  +--ro unidirectional-packet-loss?           decimal64
             |  +--ro unidirectional-residual-bandwidth?
             |  |       rt-types:bandwidth-ieee-float32
             |  +--ro unidirectional-available-bandwidth?
             |  |       rt-types:bandwidth-ieee-float32
             |  +--ro unidirectional-utilized-bandwidth?
             |          rt-types:bandwidth-ieee-float32
             +--ro threshold-accelerated-advertisement
                +--ro unidirectional-delay?                 uint32
                +--ro unidirectional-min-delay?             uint32
                +--ro unidirectional-max-delay?             uint32
                +--ro unidirectional-delay-variation?       uint32
                +--ro unidirectional-packet-loss?           decimal64
                +--ro unidirectional-residual-bandwidth?
                |       rt-types:bandwidth-ieee-float32
                +--ro unidirectional-available-bandwidth?
                |       rt-types:bandwidth-ieee-float32
                +--ro unidirectional-utilized-bandwidth?
                        rt-types:bandwidth-ieee-float32
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:tunnel-termination-point
               /tet:local-link-connectivities:
       +--rw performance-metric
          +--rw measurement
          |  +--rw unidirectional-delay?                 uint32
          |  +--rw unidirectional-min-delay?             uint32
          |  +--rw unidirectional-max-delay?             uint32
          |  +--rw unidirectional-delay-variation?       uint32
          |  +--rw unidirectional-packet-loss?           decimal64
          |  +--rw unidirectional-residual-bandwidth?
          |  |       rt-types:bandwidth-ieee-float32
          |  +--rw unidirectional-available-bandwidth?



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          |  |       rt-types:bandwidth-ieee-float32
          |  +--rw unidirectional-utilized-bandwidth?
          |          rt-types:bandwidth-ieee-float32
          +--rw normality
          |  +--rw unidirectional-delay?
          |  |       te-types:performance-metric-normality
          |  +--rw unidirectional-min-delay?
          |  |       te-types:performance-metric-normality
          |  +--rw unidirectional-max-delay?
          |  |       te-types:performance-metric-normality
          |  +--rw unidirectional-delay-variation?
          |  |       te-types:performance-metric-normality
          |  +--rw unidirectional-packet-loss?
          |  |       te-types:performance-metric-normality
          |  +--rw unidirectional-residual-bandwidth?
          |  |       te-types:performance-metric-normality
          |  +--rw unidirectional-available-bandwidth?
          |  |       te-types:performance-metric-normality
          |  +--rw unidirectional-utilized-bandwidth?
          |          te-types:performance-metric-normality
          +--rw throttle
             +--rw unidirectional-delay-offset?           uint32
             +--rw measure-interval?                      uint32
             +--rw advertisement-interval?                uint32
             +--rw suppression-interval?                  uint32
             +--rw threshold-out
             |  +--rw unidirectional-delay?                 uint32
             |  +--rw unidirectional-min-delay?             uint32
             |  +--rw unidirectional-max-delay?             uint32
             |  +--rw unidirectional-delay-variation?       uint32
             |  +--rw unidirectional-packet-loss?           decimal64
             |  +--rw unidirectional-residual-bandwidth?
             |  |       rt-types:bandwidth-ieee-float32
             |  +--rw unidirectional-available-bandwidth?
             |  |       rt-types:bandwidth-ieee-float32
             |  +--rw unidirectional-utilized-bandwidth?
             |          rt-types:bandwidth-ieee-float32
             +--rw threshold-in
             |  +--rw unidirectional-delay?                 uint32
             |  +--rw unidirectional-min-delay?             uint32
             |  +--rw unidirectional-max-delay?             uint32
             |  +--rw unidirectional-delay-variation?       uint32
             |  +--rw unidirectional-packet-loss?           decimal64
             |  +--rw unidirectional-residual-bandwidth?
             |  |       rt-types:bandwidth-ieee-float32
             |  +--rw unidirectional-available-bandwidth?
             |  |       rt-types:bandwidth-ieee-float32
             |  +--rw unidirectional-utilized-bandwidth?



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             |          rt-types:bandwidth-ieee-float32
             +--rw threshold-accelerated-advertisement
                +--rw unidirectional-delay?                 uint32
                +--rw unidirectional-min-delay?             uint32
                +--rw unidirectional-max-delay?             uint32
                +--rw unidirectional-delay-variation?       uint32
                +--rw unidirectional-packet-loss?           decimal64
                +--rw unidirectional-residual-bandwidth?
                |       rt-types:bandwidth-ieee-float32
                +--rw unidirectional-available-bandwidth?
                |       rt-types:bandwidth-ieee-float32
                +--rw unidirectional-utilized-bandwidth?
                        rt-types:bandwidth-ieee-float32
     augment /nw:networks/nw:network/nw:node/tet:te
               /tet:tunnel-termination-point
               /tet:local-link-connectivities
               /tet:local-link-connectivity:
       +--rw performance-metric
          +--rw measurement
          |  +--rw unidirectional-delay?                 uint32
          |  +--rw unidirectional-min-delay?             uint32
          |  +--rw unidirectional-max-delay?             uint32
          |  +--rw unidirectional-delay-variation?       uint32
          |  +--rw unidirectional-packet-loss?           decimal64
          |  +--rw unidirectional-residual-bandwidth?
          |  |       rt-types:bandwidth-ieee-float32
          |  +--rw unidirectional-available-bandwidth?
          |  |       rt-types:bandwidth-ieee-float32
          |  +--rw unidirectional-utilized-bandwidth?
          |          rt-types:bandwidth-ieee-float32
          +--rw normality
          |  +--rw unidirectional-delay?
          |  |       te-types:performance-metric-normality
          |  +--rw unidirectional-min-delay?
          |  |       te-types:performance-metric-normality
          |  +--rw unidirectional-max-delay?
          |  |       te-types:performance-metric-normality
          |  +--rw unidirectional-delay-variation?
          |  |       te-types:performance-metric-normality
          |  +--rw unidirectional-packet-loss?
          |  |       te-types:performance-metric-normality
          |  +--rw unidirectional-residual-bandwidth?
          |  |       te-types:performance-metric-normality
          |  +--rw unidirectional-available-bandwidth?
          |  |       te-types:performance-metric-normality
          |  +--rw unidirectional-utilized-bandwidth?
          |          te-types:performance-metric-normality
          +--rw throttle



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             +--rw unidirectional-delay-offset?           uint32
             +--rw measure-interval?                      uint32
             +--rw advertisement-interval?                uint32
             +--rw suppression-interval?                  uint32
             +--rw threshold-out
             |  +--rw unidirectional-delay?                 uint32
             |  +--rw unidirectional-min-delay?             uint32
             |  +--rw unidirectional-max-delay?             uint32
             |  +--rw unidirectional-delay-variation?       uint32
             |  +--rw unidirectional-packet-loss?           decimal64
             |  +--rw unidirectional-residual-bandwidth?
             |  |       rt-types:bandwidth-ieee-float32
             |  +--rw unidirectional-available-bandwidth?
             |  |       rt-types:bandwidth-ieee-float32
             |  +--rw unidirectional-utilized-bandwidth?
             |          rt-types:bandwidth-ieee-float32
             +--rw threshold-in
             |  +--rw unidirectional-delay?                 uint32
             |  +--rw unidirectional-min-delay?             uint32
             |  +--rw unidirectional-max-delay?             uint32
             |  +--rw unidirectional-delay-variation?       uint32
             |  +--rw unidirectional-packet-loss?           decimal64
             |  +--rw unidirectional-residual-bandwidth?
             |  |       rt-types:bandwidth-ieee-float32
             |  +--rw unidirectional-available-bandwidth?
             |  |       rt-types:bandwidth-ieee-float32
             |  +--rw unidirectional-utilized-bandwidth?
             |          rt-types:bandwidth-ieee-float32
             +--rw threshold-accelerated-advertisement
                +--rw unidirectional-delay?                 uint32
                +--rw unidirectional-min-delay?             uint32
                +--rw unidirectional-max-delay?             uint32
                +--rw unidirectional-delay-variation?       uint32
                +--rw unidirectional-packet-loss?           decimal64
                +--rw unidirectional-residual-bandwidth?
                |       rt-types:bandwidth-ieee-float32
                +--rw unidirectional-available-bandwidth?
                |       rt-types:bandwidth-ieee-float32
                +--rw unidirectional-utilized-bandwidth?
                        rt-types:bandwidth-ieee-float32
     augment /nw:networks/tet:te/tet:templates/tet:link-template
               /tet:te-link-attributes:
       +--rw performance-metric
          +--rw measurement
          |  +--rw unidirectional-delay?                 uint32
          |  +--rw unidirectional-min-delay?             uint32
          |  +--rw unidirectional-max-delay?             uint32
          |  +--rw unidirectional-delay-variation?       uint32



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          |  +--rw unidirectional-packet-loss?           decimal64
          |  +--rw unidirectional-residual-bandwidth?
          |  |       rt-types:bandwidth-ieee-float32
          |  +--rw unidirectional-available-bandwidth?
          |  |       rt-types:bandwidth-ieee-float32
          |  +--rw unidirectional-utilized-bandwidth?
          |          rt-types:bandwidth-ieee-float32
          +--rw normality
          |  +--rw unidirectional-delay?
          |  |       te-types:performance-metric-normality
          |  +--rw unidirectional-min-delay?
          |  |       te-types:performance-metric-normality
          |  +--rw unidirectional-max-delay?
          |  |       te-types:performance-metric-normality
          |  +--rw unidirectional-delay-variation?
          |  |       te-types:performance-metric-normality
          |  +--rw unidirectional-packet-loss?
          |  |       te-types:performance-metric-normality
          |  +--rw unidirectional-residual-bandwidth?
          |  |       te-types:performance-metric-normality
          |  +--rw unidirectional-available-bandwidth?
          |  |       te-types:performance-metric-normality
          |  +--rw unidirectional-utilized-bandwidth?
          |          te-types:performance-metric-normality
          +--rw throttle
             +--rw unidirectional-delay-offset?           uint32
             +--rw measure-interval?                      uint32
             +--rw advertisement-interval?                uint32
             +--rw suppression-interval?                  uint32
             +--rw threshold-out
             |  +--rw unidirectional-delay?                 uint32
             |  +--rw unidirectional-min-delay?             uint32
             |  +--rw unidirectional-max-delay?             uint32
             |  +--rw unidirectional-delay-variation?       uint32
             |  +--rw unidirectional-packet-loss?           decimal64
             |  +--rw unidirectional-residual-bandwidth?
             |  |       rt-types:bandwidth-ieee-float32
             |  +--rw unidirectional-available-bandwidth?
             |  |       rt-types:bandwidth-ieee-float32
             |  +--rw unidirectional-utilized-bandwidth?
             |          rt-types:bandwidth-ieee-float32
             +--rw threshold-in
             |  +--rw unidirectional-delay?                 uint32
             |  +--rw unidirectional-min-delay?             uint32
             |  +--rw unidirectional-max-delay?             uint32
             |  +--rw unidirectional-delay-variation?       uint32
             |  +--rw unidirectional-packet-loss?           decimal64
             |  +--rw unidirectional-residual-bandwidth?



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             |  |       rt-types:bandwidth-ieee-float32
             |  +--rw unidirectional-available-bandwidth?
             |  |       rt-types:bandwidth-ieee-float32
             |  +--rw unidirectional-utilized-bandwidth?
             |          rt-types:bandwidth-ieee-float32
             +--rw threshold-accelerated-advertisement
                +--rw unidirectional-delay?                 uint32
                +--rw unidirectional-min-delay?             uint32
                +--rw unidirectional-max-delay?             uint32
                +--rw unidirectional-delay-variation?       uint32
                +--rw unidirectional-packet-loss?           decimal64
                +--rw unidirectional-residual-bandwidth?
                |       rt-types:bandwidth-ieee-float32
                +--rw unidirectional-available-bandwidth?
                |       rt-types:bandwidth-ieee-float32
                +--rw unidirectional-utilized-bandwidth?
                        rt-types:bandwidth-ieee-float32
     augment /nw:networks/nw:network/nt:link/tet:te
               /tet:te-link-attributes:
       +--rw performance-metric
          +--rw measurement
          |  +--rw unidirectional-delay?                 uint32
          |  +--rw unidirectional-min-delay?             uint32
          |  +--rw unidirectional-max-delay?             uint32
          |  +--rw unidirectional-delay-variation?       uint32
          |  +--rw unidirectional-packet-loss?           decimal64
          |  +--rw unidirectional-residual-bandwidth?
          |  |       rt-types:bandwidth-ieee-float32
          |  +--rw unidirectional-available-bandwidth?
          |  |       rt-types:bandwidth-ieee-float32
          |  +--rw unidirectional-utilized-bandwidth?
          |          rt-types:bandwidth-ieee-float32
          +--rw normality
          |  +--rw unidirectional-delay?
          |  |       te-types:performance-metric-normality
          |  +--rw unidirectional-min-delay?
          |  |       te-types:performance-metric-normality
          |  +--rw unidirectional-max-delay?
          |  |       te-types:performance-metric-normality
          |  +--rw unidirectional-delay-variation?
          |  |       te-types:performance-metric-normality
          |  +--rw unidirectional-packet-loss?
          |  |       te-types:performance-metric-normality
          |  +--rw unidirectional-residual-bandwidth?
          |  |       te-types:performance-metric-normality
          |  +--rw unidirectional-available-bandwidth?
          |  |       te-types:performance-metric-normality
          |  +--rw unidirectional-utilized-bandwidth?



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          |          te-types:performance-metric-normality
          +--rw throttle
             +--rw unidirectional-delay-offset?           uint32
             +--rw measure-interval?                      uint32
             +--rw advertisement-interval?                uint32
             +--rw suppression-interval?                  uint32
             +--rw threshold-out
             |  +--rw unidirectional-delay?                 uint32
             |  +--rw unidirectional-min-delay?             uint32
             |  +--rw unidirectional-max-delay?             uint32
             |  +--rw unidirectional-delay-variation?       uint32
             |  +--rw unidirectional-packet-loss?           decimal64
             |  +--rw unidirectional-residual-bandwidth?
             |  |       rt-types:bandwidth-ieee-float32
             |  +--rw unidirectional-available-bandwidth?
             |  |       rt-types:bandwidth-ieee-float32
             |  +--rw unidirectional-utilized-bandwidth?
             |          rt-types:bandwidth-ieee-float32
             +--rw threshold-in
             |  +--rw unidirectional-delay?                 uint32
             |  +--rw unidirectional-min-delay?             uint32
             |  +--rw unidirectional-max-delay?             uint32
             |  +--rw unidirectional-delay-variation?       uint32
             |  +--rw unidirectional-packet-loss?           decimal64
             |  +--rw unidirectional-residual-bandwidth?
             |  |       rt-types:bandwidth-ieee-float32
             |  +--rw unidirectional-available-bandwidth?
             |  |       rt-types:bandwidth-ieee-float32
             |  +--rw unidirectional-utilized-bandwidth?
             |          rt-types:bandwidth-ieee-float32
             +--rw threshold-accelerated-advertisement
                +--rw unidirectional-delay?                 uint32
                +--rw unidirectional-min-delay?             uint32
                +--rw unidirectional-max-delay?             uint32
                +--rw unidirectional-delay-variation?       uint32
                +--rw unidirectional-packet-loss?           decimal64
                +--rw unidirectional-residual-bandwidth?
                |       rt-types:bandwidth-ieee-float32
                +--rw unidirectional-available-bandwidth?
                |       rt-types:bandwidth-ieee-float32
                +--rw unidirectional-utilized-bandwidth?
                        rt-types:bandwidth-ieee-float32
     augment /nw:networks/nw:network/nt:link/tet:te
               /tet:information-source-entry:
       +--ro performance-metric
          +--ro measurement
          |  +--ro unidirectional-delay?                 uint32
          |  +--ro unidirectional-min-delay?             uint32



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          |  +--ro unidirectional-max-delay?             uint32
          |  +--ro unidirectional-delay-variation?       uint32
          |  +--ro unidirectional-packet-loss?           decimal64
          |  +--ro unidirectional-residual-bandwidth?
          |  |       rt-types:bandwidth-ieee-float32
          |  +--ro unidirectional-available-bandwidth?
          |  |       rt-types:bandwidth-ieee-float32
          |  +--ro unidirectional-utilized-bandwidth?
          |          rt-types:bandwidth-ieee-float32
          +--ro normality
          |  +--ro unidirectional-delay?
          |  |       te-types:performance-metric-normality
          |  +--ro unidirectional-min-delay?
          |  |       te-types:performance-metric-normality
          |  +--ro unidirectional-max-delay?
          |  |       te-types:performance-metric-normality
          |  +--ro unidirectional-delay-variation?
          |  |       te-types:performance-metric-normality
          |  +--ro unidirectional-packet-loss?
          |  |       te-types:performance-metric-normality
          |  +--ro unidirectional-residual-bandwidth?
          |  |       te-types:performance-metric-normality
          |  +--ro unidirectional-available-bandwidth?
          |  |       te-types:performance-metric-normality
          |  +--ro unidirectional-utilized-bandwidth?
          |          te-types:performance-metric-normality
          +--ro throttle
             +--ro unidirectional-delay-offset?           uint32
             +--ro measure-interval?                      uint32
             +--ro advertisement-interval?                uint32
             +--ro suppression-interval?                  uint32
             +--ro threshold-out
             |  +--ro unidirectional-delay?                 uint32
             |  +--ro unidirectional-min-delay?             uint32
             |  +--ro unidirectional-max-delay?             uint32
             |  +--ro unidirectional-delay-variation?       uint32
             |  +--ro unidirectional-packet-loss?           decimal64
             |  +--ro unidirectional-residual-bandwidth?
             |  |       rt-types:bandwidth-ieee-float32
             |  +--ro unidirectional-available-bandwidth?
             |  |       rt-types:bandwidth-ieee-float32
             |  +--ro unidirectional-utilized-bandwidth?
             |          rt-types:bandwidth-ieee-float32
             +--ro threshold-in
             |  +--ro unidirectional-delay?                 uint32
             |  +--ro unidirectional-min-delay?             uint32
             |  +--ro unidirectional-max-delay?             uint32
             |  +--ro unidirectional-delay-variation?       uint32



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             |  +--ro unidirectional-packet-loss?           decimal64
             |  +--ro unidirectional-residual-bandwidth?
             |  |       rt-types:bandwidth-ieee-float32
             |  +--ro unidirectional-available-bandwidth?
             |  |       rt-types:bandwidth-ieee-float32
             |  +--ro unidirectional-utilized-bandwidth?
             |          rt-types:bandwidth-ieee-float32
             +--ro threshold-accelerated-advertisement
                +--ro unidirectional-delay?                 uint32
                +--ro unidirectional-min-delay?             uint32
                +--ro unidirectional-max-delay?             uint32
                +--ro unidirectional-delay-variation?       uint32
                +--ro unidirectional-packet-loss?           decimal64
                +--ro unidirectional-residual-bandwidth?
                |       rt-types:bandwidth-ieee-float32
                +--ro unidirectional-available-bandwidth?
                |       rt-types:bandwidth-ieee-float32
                +--ro unidirectional-utilized-bandwidth?
                        rt-types:bandwidth-ieee-float32
     augment /nw:networks/tet:te/tet:templates/tet:link-template
               /tet:te-link-attributes
               /tet:interface-switching-capability:
       +--rw packet-switch-capable
          +--rw minimum-lsp-bandwidth?   rt-types:bandwidth-ieee-float32
          +--rw interface-mtu?           uint16
     augment /nw:networks/nw:network/nt:link/tet:te
               /tet:te-link-attributes
               /tet:interface-switching-capability:
       +--rw packet-switch-capable
          +--rw minimum-lsp-bandwidth?   rt-types:bandwidth-ieee-float32
          +--rw interface-mtu?           uint16
     augment /nw:networks/nw:network/nt:link/tet:te
               /tet:information-source-entry
               /tet:interface-switching-capability:
       +--ro packet-switch-capable
          +--ro minimum-lsp-bandwidth?   rt-types:bandwidth-ieee-float32
          +--ro interface-mtu?           uint16


5.  YANG Modules

5.1.  Layer 3 TE Topology Module

   This module references [RFC8345], [RFC8346], and
   [I-D.ietf-teas-yang-te-topo].


   <CODE BEGINS> file "ietf-l3-te-topology@2018-06-22.yang"



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   module ietf-l3-te-topology {
     yang-version 1.1;
     namespace "urn:ietf:params:xml:ns:yang:ietf-l3-te-topology";
     prefix "l3tet";

     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-l3-unicast-topology {
       prefix "l3t";
       reference "RFC 8346: A YANG Data Model for Layer 3 Topologies";
     }
     import ietf-te-topology {
       prefix "tet";
       reference
         "I-D.ietf-teas-yang-te-topo: YANG Data Model for Traffic
          Engineering (TE) Topologies";
     }

     organization
       "IETF Traffic Engineering Architecture and Signaling (TEAS)
        Working Group";

     contact
       "WG Web:   <http://tools.ietf.org/wg/teas/>
        WG List:  <mailto:teas@ietf.org>

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

        Editor:   Igor Bryskin
                  <mailto:Igor.Bryskin@huawei.com>

        Editor:   Vishnu Pavan Beeram
                  <mailto:vbeeram@juniper.net>

        Editor:   Tarek Saad
                  <mailto:tsaad@cisco.com>

        Editor:   Himanshu Shah
                  <mailto:hshah@ciena.com>

        Editor:   Oscar Gonzalez De Dios



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                  <mailto:oscar.gonzalezdedios@telefonica.com>";

     description
       "YANG data model for representing and manipulating Layer 3 TE
        Topologies.

        Copyright (c) 2018 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).

        This version of this YANG module is part of RFC XXXX; see the
        RFC itself for full legal notices.";

     revision 2018-06-22 {

       description "Initial revision";
       reference "RFC XXXX: YANG Data Model for Layer 3 TE Topologies";
     }

     grouping l3-te-topology-type {
       description
         "Identifies the L3 TE topology type.";
       container l3-te {
         presence "indiates L3 TE Topology";
         description
           "Its presence identifies the L3 TE topology type.";
       }
     }

     augment "/nw:networks/nw:network/nw:network-types/"
       + "l3t:l3-unicast-topology" {
       description
         "Defines the L3 TE topology type.";
       uses l3-te-topology-type;
     }

     augment "/nw:networks/nw:network/l3t:l3-topology-attributes" {
       when "../nw:network-types/l3t:l3-unicast-topology/l3tet:l3-te" {
         description "Augment only for L3 TE topology";
       }
       description "Augment topology configuration";
       uses l3-te-topology-attributes;



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     }

     augment "/nw:networks/nw:network/nw:node/l3t:l3-node-attributes" {
       when "../../nw:network-types/l3t:l3-unicast-topology/"
         + "l3tet:l3-te" {
         description "Augment only for L3 TE topology";
       }
       description "Augment node configuration";
       uses l3-te-node-attributes;
     }

     augment "/nw:networks/nw:network/nw:node/nt:termination-point/"
       + "l3t:l3-termination-point-attributes" {
       when "../../../nw:network-types/l3t:l3-unicast-topology/"
         + "l3tet:l3-te" {
         description "Augment only for L3 TE topology";
       }
       description "Augment termination point configuration";
       uses l3-te-tp-attributes;
     }

     augment "/nw:networks/nw:network/nt:link/l3t:l3-link-attributes" {
       when "../../nw:network-types/l3t:l3-unicast-topology/"
         + "l3tet:l3-te" {
         description "Augment only for L3 TE topology";
       }
       description "Augment link configuration";
       uses l3-te-link-attributes;
     }

     grouping l3-te-topology-attributes {
       description "L3 TE topology scope attributes";
       container l3-te-topology-attributes {
         must "/nw:networks/nw:network"
           + "[nw:network-id = current()/network-ref]/nw:network-types/"
           + "tet:te-topology" {
           error-message
             "The referenced network must be a TE topology.";
           description
             "The referenced network must be a TE topology.";
         }
         description "Containing TE topology references";
         uses nw:network-ref;
       } // l3-te-topology-attributes
     } // l3-te-topology-attributes

     grouping l3-te-node-attributes {
       description "L3 TE node scope attributes";



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       container l3-te-node-attributes {
         must "/nw:networks/nw:network"
           + "[nw:network-id = current()/network-ref]/nw:network-types/"
           + "tet:te-topology" {
           error-message
             "The referenced network must be a TE topology.";
           description
             "The referenced network must be a TE topology.";
         }
         description "Containing TE node references";
         uses nw:node-ref;
       } // l3-te
     } // l3-te-node-attributes

     grouping l3-te-tp-attributes {
       description "L3 TE termination point scope attributes";
       container l3-te-tp-attributes {
         must "/nw:networks/nw:network"
           + "[nw:network-id = current()/network-ref]/nw:network-types/"
           + "tet:te-topology" {
           error-message
             "The referenced network must be a TE topology.";
           description
             "The referenced network must be a TE topology.";
         }
         description "Containing TE termination point references";
         uses nt:tp-ref;
       } // l3-te
     } // l3-te-tp-attributes

     grouping l3-te-link-attributes {
       description "L3 TE link scope attributes";
       container l3-te-link-attributes {
         must "/nw:networks/nw:network"
           + "[nw:network-id = current()/network-ref]/nw:network-types/"
           + "tet:te-topology" {
           error-message
             "The referenced network must be a TE topology.";
           description
             "The referenced network must be a TE topology.";
         }
         description "Containing TE link references";
         uses nt:link-ref;
       }
     } // l3-te-link-attributes
   }
   <CODE ENDS>




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5.2.  Packet Switching TE Topology Module

   This module references [RFC7471], [RFC7810], [RFC7823], [RFC8294],
   [RFC8345], [RFC8346].  [I-D.ietf-teas-yang-te], and
   [I-D.ietf-teas-yang-te-topo].


   <CODE BEGINS> file "ietf-te-topology-packet@2018-06-22.yang"
   module ietf-te-topology-packet {
     yang-version 1.1;
     namespace "urn:ietf:params:xml:ns:yang:ietf-te-topology-packet";

     prefix "tet-pkt";

     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-routing-types {
       prefix "rt-types";
       reference
         "RFC 8294: Common YANG Data Types for the Routing Area";
     }

     import ietf-te-topology {
       prefix "tet";
       reference
         "I-D.ietf-teas-yang-te-topo: YANG Data Model for Traffic
          Engineering (TE) Topologies";
     }

     import ietf-te-types {
       prefix "te-types";
       reference
         "I-D.ietf-teas-yang-te: A YANG Data Model for Traffic
          Engineering Tunnels and Interfaces";
     }

     organization
       "Traffic Engineering Architecture and Signaling (TEAS)
        Working Group";




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     contact
       "WG Web:   <http://tools.ietf.org/wg/teas/>
        WG List:  <mailto:teas@ietf.org>

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

        Editor:   Igor Bryskin
                  <mailto:Igor.Bryskin@huawei.com>

        Editor:   Vishnu Pavan Beeram
                  <mailto:vbeeram@juniper.net>

        Editor:   Tarek Saad
                  <mailto:tsaad@cisco.com>

        Editor:   Himanshu Shah
                  <mailto:hshah@ciena.com>

        Editor:   Oscar Gonzalez De Dios
                  <mailto:oscar.gonzalezdedios@telefonica.com>";

     description
       "YANG data model for representing and manipulating PSC (Packet
        Switching) TE Topologies.

        Copyright (c) 2018 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).

        This version of this YANG module is part of RFC XXXX; see the
        RFC itself for full legal notices.";

     revision 2018-06-22 {
       description "Initial revision";
       reference "RFC XXXX: YANG Data Model for Layer 3 TE Topologies";
     }

     /*
      * Features
      */




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     feature te-performance-metric {
       description
         "This feature indicates that the system supports
          TE performance metric.";
       reference
         "RFC7471: OSPF Traffic Engineering (TE) Metric Extensions.
          RFC7810: IS-IS Traffic Engineering (TE) Metric Extensions.
          RFC7823: Performance-Based Path Selection for Explicitly
          Routed Label Switched Paths (LSPs) Using TE Metric
          Extensions";
     }

     /*
      * Groupings
      */
     grouping packet-switch-capable-container {
       description
         "The container of packet switch capable attributes.";
       container packet-switch-capable {
         description
           "Interface has packet-switching capabilities.";
         leaf minimum-lsp-bandwidth {
           type rt-types:bandwidth-ieee-float32;
           description
             "Minimum LSP Bandwidth. Units in bytes per second";
         }
         leaf interface-mtu {
           type uint16;
           description
             "Interface MTU.";
         }
       }
     }

     /*
      * Augmentations
      */
     /* Augmentations to connectivity-matrix */
     augment "/nw:networks/nw:network/nw:node/tet:te/"
       + "tet:te-node-attributes/tet:connectivity-matrices" {
       description
         "Parameters for PSC TE topology.";
       uses te-types:performance-metric-container {
         if-feature te-performance-metric;
       }
     }

     augment "/nw:networks/nw:network/nw:node/tet:te/"



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           + "tet:te-node-attributes/tet:connectivity-matrices/"
           + "tet:connectivity-matrix" {
       description
         "Parameters for PSC TE topology.";
       uses te-types:performance-metric-container {
         if-feature te-performance-metric;
       }
     }

     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:information-source-entry/tet:connectivity-matrices" {
       description
         "Parameters for PSC TE topology.";
       uses te-types:performance-metric-container {
         if-feature te-performance-metric;
       }
     }

     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:information-source-entry/tet:connectivity-matrices/"
           + "tet:connectivity-matrix" {
       description
         "Parameters for PSC TE topology.";
       uses te-types:performance-metric-container {
         if-feature te-performance-metric;
       }
     }

     /* Augmentations to tunnel-termination-point */
     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:tunnel-termination-point/"
           + "tet:local-link-connectivities" {
       description
         "Parameters for PSC TE topology.";
       uses te-types:performance-metric-container {
         if-feature te-performance-metric;
       }
     }

     augment "/nw:networks/nw:network/nw:node/tet:te/"
           + "tet:tunnel-termination-point/"
           + "tet:local-link-connectivities/"
           + "tet:local-link-connectivity" {
       description
         "Parameters for PSC TE topology.";
       uses te-types:performance-metric-container {
         if-feature te-performance-metric;
       }



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     }

     /* Augmentations to te-link-attributes */
     augment "/nw:networks/tet:te/tet:templates/"
           + "tet:link-template/tet:te-link-attributes" {
       when "tet:interface-switching-capability "
         + "[tet:switching-capability = 'te-types:switching-psc1']" {
         description "Valid only for PSC";
       }
       description
         "Parameters for PSC TE topology.";
       uses te-types:performance-metric-container {
         if-feature te-performance-metric;
       }
     }

     augment "/nw:networks/nw:network/nt:link/tet:te/"
           + "tet:te-link-attributes" {
       when "tet:interface-switching-capability "
         + "[tet:switching-capability = 'te-types:switching-psc1']" {
         description "Valid only for PSC";
       }
       description
         "Parameters for PSC TE topology.";
       uses te-types:performance-metric-container {
         if-feature te-performance-metric;
       }
     }

     augment "/nw:networks/nw:network/nt:link/tet:te/"
           + "tet:information-source-entry" {
       when "tet:interface-switching-capability "
         + "[tet:switching-capability = 'te-types:switching-psc1']" {
         description "Valid only for PSC";
       }
       description
         "Parameters for PSC TE topology.";
       uses te-types:performance-metric-container {
         if-feature te-performance-metric;
       }
     }

     /* Augmentations to interface-switching-capability */
     augment "/nw:networks/tet:te/tet:templates/"
           + "tet:link-template/tet:te-link-attributes/"
           + "tet:interface-switching-capability" {
       when "tet:switching-capability = 'te-types:switching-psc1' " {
         description "Valid only for PSC";



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       }
       description
         "Parameters for PSC TE topology.";
       uses packet-switch-capable-container;
     }

     augment "/nw:networks/nw:network/nt:link/tet:te/"
           + "tet:te-link-attributes/"
           + "tet:interface-switching-capability" {
       when "tet:switching-capability = 'te-types:switching-psc1' " {
         description "Valid only for PSC";
       }
       description
         "Parameters for PSC TE topology.";
       uses packet-switch-capable-container;
     }

     augment "/nw:networks/nw:network/nt:link/tet:te/"
           + "tet:information-source-entry/"
           + "tet:interface-switching-capability" {
       when "tet:switching-capability = 'te-types:switching-psc1' " {
         description "Valid only for PSC";
       }
       description
         "Parameters for PSC TE topology.";
       uses packet-switch-capable-container;
     }
   }
   <CODE ENDS>



6.  IANA Considerations

   RFC Ed.: In this section, replace all occurrences of 'XXXX' with the
   actual RFC number (and remove this note).

   This document registers the following namespace URIs in the IETF XML
   registry [RFC3688]:

   --------------------------------------------------------------------
   URI: urn:ietf:params:xml:ns:yang:ietf-l3-te-topology
   Registrant Contact: The IESG.
   XML: N/A, the requested URI is an XML namespace.
   --------------------------------------------------------------------






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   --------------------------------------------------------------------
   URI: urn:ietf:params:xml:ns:yang:ietf-l3-te-topology-state
   Registrant Contact: The IESG.
   XML: N/A, the requested URI is an XML namespace.
   --------------------------------------------------------------------

   --------------------------------------------------------------------
   URI: urn:ietf:params:xml:ns:yang:ietf-te-topology-packet
   Registrant Contact: The IESG.
   XML: N/A, the requested URI is an XML namespace.
   --------------------------------------------------------------------

   --------------------------------------------------------------------
   URI: urn:ietf:params:xml:ns:yang:ietf-te-topology-packet-state
   Registrant Contact: The IESG.
   XML: N/A, the requested URI is an XML namespace.
   --------------------------------------------------------------------

   This document registers the following YANG modules in the YANG Module
   Names registry [RFC6020]:

   --------------------------------------------------------------------
   name:         ietf-l3-te-topology
   namespace:    urn:ietf:params:xml:ns:yang:ietf-l3-te-topology
   prefix:       l3te
   reference:    RFC XXXX
   --------------------------------------------------------------------

   --------------------------------------------------------------------
   name:         ietf-l3-te-topology-state
   namespace:    urn:ietf:params:xml:ns:yang:ietf-l3-te-topology-state
   prefix:       l3te-s
   reference:    RFC XXXX
   --------------------------------------------------------------------

   --------------------------------------------------------------------
   name:         ietf-te-topology-packet
   namespace:    urn:ietf:params:xml:ns:yang:ietf-te-topology-packet
   prefix:       tet-pkt
   reference:    RFC XXXX
   --------------------------------------------------------------------

   --------------------------------------------------------------------
   name:         ietf-te-topology-packet-state
   namespace:  urn:ietf:params:xml:ns:yang:ietf-te-topology-packet-state
   prefix:       tet-pkt-s
   reference:    RFC XXXX
   --------------------------------------------------------------------



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7.  Security Considerations

   The YANG module specified in this document defines a schema for data
   that is designed to be accessed via network management protocols such
   as NETCONF [RFC6241] or RESTCONF [RFC8040].  The lowest NETCONF layer
   is the secure transport layer, and the mandatory-to-implement secure
   transport is Secure Shell (SSH) [RFC6242].  The lowest RESTCONF layer
   is HTTPS, and the mandatory-to-implement secure transport is TLS
   [RFC5246].

   The NETCONF access control model [RFC6536] provides the means to
   restrict access for particular NETCONF or RESTCONF users to a
   preconfigured subset of all available NETCONF or RESTCONF protocol
   operations and content.

   There are a number of data nodes defined in this YANG module that are
   writable/creatable/deletable (i.e., config true, which is the
   default).  These data nodes may be considered sensitive or vulnerable
   in some network environments.  Write operations (e.g., edit-config)
   to these data nodes without proper protection can have a negative
   effect on network operations.  These are the subtrees and data nodes
   and their sensitivity/vulnerability:

   /nw:networks/nw:network/nw:network-types/l3t:l3-unicast-topology/
   l3-te
      This subtree specifies the layer 3 TE topology type.  Modifying
      the configurations can make layer 3 TE topology type invalid and
      cause interruption to all layer 3 TE networks.

   /nw:networks/nw:network/l3t:l3-topology-attributes/l3-te-topology-
   attributes
      This subtree specifies the topology-wide configurations, including
      the reference to a TE topology from a layer 3 network topolopy.
      Modifying the configurations here can cause traffic disabled or
      rerouted in this topology and the connected topologies.

   /nw:networks/nw:network/nw:node/l3t:l3-node-attributes/l3-te-node-
   attributes
      This subtree specifies the configurations of layer 3 TE nodes.
      Modifying the configurations in this subtree can change the
      relationship between a TE node and a layer 3 node, causing traffic
      disabled or rerouted in the specified nodes and the related layer
      3 topologies.

   /nw:networks/nw:network/nw:node/nt:termination-point//l3t:l3-
   termination-point-attributes/l3-te-tp-attributes
      This subtree specifies the configurations of layer 3 TE link
      termination points.  Modifying the configurations in this subtree



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      can change the relationship between a TE link termination point
      and a layer 3 link termination point, causing traffic disabled or
      rerouted on the related layer 3 links and the related layer 3
      topologies.

   /nw:networks/nw:network/nt:link/l3t:l3-link-attributes/l3-te-link-
   attributes
      This subtree specifies the configurations of layer 3 TE links.
      Modifying the configurations in this subtree can change the
      relationship between a TE link and a layer 3 link, causing traffic
      disabled or rerouted on the specified layer 3 link and the related
      layer 3 topologies.

   performance-metric containers
      The container "performance-metric" is augmented to multiple
      locations of the base TE topology model, as specified in
      Section 3.2.  Modifying the configuration in such a container can
      change the behavours of performance metric monitoring, causing
      traffic disabled or rerouted on the related layer 3 links, nodes,
      or topologies.

   Some of the readable data nodes in this YANG module may be considered
   sensitive or vulnerable in some network environments.  It is thus
   important to control read access (e.g., via get, get-config, or
   notification) to these data nodes.  These are the subtrees and data
   nodes and their sensitivity/vulnerability:

   /nw:networks/nw:network/nw:network-types/l3t:l3-unicast-topology/
   l3-te
      Unauthorized access to this subtree can disclose the layer 3 TE
      topology type.

   /nw:networks/nw:network/l3t:l3-topology-attributes/l3-te-topology-
   attributes
      Unauthorized access to this subtree can disclose the topology-wide
      configurations, including the reference to a TE topology from a
      layer 3 network topolopy.

   /nw:networks/nw:network/nw:node/l3t:l3-node-attributes/l3-te-node-
   attributes
      Unauthorized access to this subtree can disclose the operational
      state information of layer 3 TE nodes.

   /nw:networks/nw:network/nw:node/nt:termination-point//l3t:l3-
   termination-point-attributes/l3-te-tp-attributes
      Unauthorized access to this subtree can disclose the operational
      state information of layer 3 TE link termination points.




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   /nw:networks/nw:network/nt:link/l3t:l3-link-attributes/l3-te-link-
   attributes
      Unauthorized access to this subtree can disclose the operational
      state information of layer 3 TE links.

   performance-metric containers
      The container "performance-metric" is augmented to multiple
      locations of the base TE topology model, as specified in
      Section 3.2.  Unauthorized access to this subtree can disclose the
      operational state information of performance metric monitoring.

8.  References

8.1.  Normative References

   [RFC2119]  Bradner, S., "Key words for use in RFCs to Indicate
              Requirement Levels", BCP 14, RFC 2119,
              DOI 10.17487/RFC2119, March 1997,
              <https://www.rfc-editor.org/info/rfc2119>.

   [RFC5246]  Dierks, T. and E. Rescorla, "The Transport Layer Security
              (TLS) Protocol Version 1.2", RFC 5246,
              DOI 10.17487/RFC5246, August 2008,
              <https://www.rfc-editor.org/info/rfc5246>.

   [RFC6241]  Enns, R., Ed., Bjorklund, M., Ed., Schoenwaelder, J., Ed.,
              and A. Bierman, Ed., "Network Configuration Protocol
              (NETCONF)", RFC 6241, DOI 10.17487/RFC6241, June 2011,
              <https://www.rfc-editor.org/info/rfc6241>.

   [RFC6242]  Wasserman, M., "Using the NETCONF Protocol over Secure
              Shell (SSH)", RFC 6242, DOI 10.17487/RFC6242, June 2011,
              <https://www.rfc-editor.org/info/rfc6242>.

   [RFC6536]  Bierman, A. and M. Bjorklund, "Network Configuration
              Protocol (NETCONF) Access Control Model", RFC 6536,
              DOI 10.17487/RFC6536, March 2012,
              <https://www.rfc-editor.org/info/rfc6536>.

   [RFC7471]  Giacalone, S., Ward, D., Drake, J., Atlas, A., and S.
              Previdi, "OSPF Traffic Engineering (TE) Metric
              Extensions", RFC 7471, DOI 10.17487/RFC7471, March 2015,
              <https://www.rfc-editor.org/info/rfc7471>.

   [RFC7810]  Previdi, S., Ed., Giacalone, S., Ward, D., Drake, J., and
              Q. Wu, "IS-IS Traffic Engineering (TE) Metric Extensions",
              RFC 7810, DOI 10.17487/RFC7810, May 2016,
              <https://www.rfc-editor.org/info/rfc7810>.



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   [RFC7823]  Atlas, A., Drake, J., Giacalone, S., and S. Previdi,
              "Performance-Based Path Selection for Explicitly Routed
              Label Switched Paths (LSPs) Using TE Metric Extensions",
              RFC 7823, DOI 10.17487/RFC7823, May 2016,
              <https://www.rfc-editor.org/info/rfc7823>.

   [RFC7950]  Bjorklund, M., Ed., "The YANG 1.1 Data Modeling Language",
              RFC 7950, DOI 10.17487/RFC7950, August 2016,
              <https://www.rfc-editor.org/info/rfc7950>.

   [RFC8040]  Bierman, A., Bjorklund, M., and K. Watsen, "RESTCONF
              Protocol", RFC 8040, DOI 10.17487/RFC8040, January 2017,
              <https://www.rfc-editor.org/info/rfc8040>.

   [RFC8294]  Liu, X., Qu, Y., Lindem, A., Hopps, C., and L. Berger,
              "Common YANG Data Types for the Routing Area", RFC 8294,
              DOI 10.17487/RFC8294, December 2017,
              <https://www.rfc-editor.org/info/rfc8294>.

   [RFC8342]  Bjorklund, M., Schoenwaelder, J., Shafer, P., Watsen, K.,
              and R. Wilton, "Network Management Datastore Architecture
              (NMDA)", RFC 8342, DOI 10.17487/RFC8342, March 2018,
              <https://www.rfc-editor.org/info/rfc8342>.

   [RFC8345]  Clemm, A., Medved, J., Varga, R., Bahadur, N.,
              Ananthakrishnan, H., and X. Liu, "A YANG Data Model for
              Network Topologies", RFC 8345, DOI 10.17487/RFC8345, March
              2018, <https://www.rfc-editor.org/info/rfc8345>.

   [RFC8346]  Clemm, A., Medved, J., Varga, R., Liu, X.,
              Ananthakrishnan, H., and N. Bahadur, "A YANG Data Model
              for Layer 3 Topologies", RFC 8346, DOI 10.17487/RFC8346,
              March 2018, <https://www.rfc-editor.org/info/rfc8346>.

   [I-D.ietf-teas-yang-te]
              Saad, T., Gandhi, R., Liu, X., Beeram, V., Shah, H., and
              I. Bryskin, "A YANG Data Model for Traffic Engineering
              Tunnels and Interfaces", draft-ietf-teas-yang-te-15 (work
              in progress), June 2018.

   [I-D.ietf-teas-yang-te-topo]
              Liu, X., Bryskin, I., Beeram, V., Saad, T., Shah, H., and
              O. Dios, "YANG Data Model for Traffic Engineering (TE)
              Topologies", draft-ietf-teas-yang-te-topo-18 (work in
              progress), June 2018.






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8.2.  Informative References

   [RFC8340]  Bjorklund, M. and L. Berger, Ed., "YANG Tree Diagrams",
              BCP 215, RFC 8340, DOI 10.17487/RFC8340, March 2018,
              <https://www.rfc-editor.org/info/rfc8340>.














































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Appendix A.  Companion YANG Model for Non-NMDA Compliant Implementations

   The YANG modules ietf-l3-te-topology and ietf-te-topology-packet
   defined in this document are designed to be used in conjunction with
   implementations that support the Network Management Datastore
   Architecture (NMDA) defined in [RFC8342].  In order to allow
   implementations to use the model even in cases when NMDA is not
   supported, the following companion modules, ietf-l3-te-topology-state
   and ietf-te-topology-packet-state, are defined as state models, which
   mirror the modules ietf-l3-te-topology and ietf-te-topology-packet
   defined earlier in this document.  However, all data nodes in the
   companion module are non-configurable, to represent the applied
   configuration or the derived operational states.

   The companion modules, ietf-l3-te-topology-state and ietf-te-
   topology-packet-state, are redundant and SHOULD NOT be supported by
   implementations that support NMDA.

   As the structure of the companion modules mirrors that of the
   coorespinding NMDA models, the YANG trees of the companion modules
   are not depicted separately.

A.1.  Layer 3 TE Topology State Module

   This module references [RFC8345], and [RFC8346].


   <CODE BEGINS> file "ietf-l3-te-topology-state@2018-06-22.yang"
   module ietf-l3-te-topology-state {
     yang-version 1.1;
     namespace "urn:ietf:params:xml:ns:yang:ietf-l3-te-topology-state";
     prefix "l3tet-s";

     import ietf-l3-te-topology {
       prefix "l3tet";
     }
     import ietf-network-state {
       prefix "nw-s";
       reference "RFC 8345: A YANG Data Model for Network Topologies";
     }
     import ietf-network-topology-state {
       prefix "nt-s";
       reference "RFC 8345: A YANG Data Model for Network Topologies";
     }
     import ietf-l3-unicast-topology-state {
       prefix "l3t-s";
       reference "RFC 8346: A YANG Data Model for Layer 3 Topologies";
     }



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     organization
       "IETF Traffic Engineering Architecture and Signaling (TEAS)
        Working Group";

     contact
       "WG Web:   <http://tools.ietf.org/wg/teas/>
        WG List:  <mailto:teas@ietf.org>

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

        Editor:   Igor Bryskin
                  <mailto:Igor.Bryskin@huawei.com>

        Editor:   Vishnu Pavan Beeram
                  <mailto:vbeeram@juniper.net>

        Editor:   Tarek Saad
                  <mailto:tsaad@cisco.com>

        Editor:   Himanshu Shah
                  <mailto:hshah@ciena.com>

        Editor:   Oscar Gonzalez De Dios
                  <mailto:oscar.gonzalezdedios@telefonica.com>";

     description
       "YANG data model for representing operational state information
        of Layer 3 TE Topologies, when NMDA is not supported.

        Copyright (c) 2018 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).

        This version of this YANG module is part of RFC XXXX; see the
        RFC itself for full legal notices.";

     revision 2018-06-22 {

       description "Initial revision";
       reference "RFC XXXX: YANG Data Model for Layer 3 TE Topologies";
     }



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     augment "/nw-s:networks/nw-s:network/nw-s:network-types/"
       + "l3t-s:l3-unicast-topology" {
       description
         "Defines the L3 TE topology type.";
       uses l3tet:l3-te-topology-type;
     }

     augment "/nw-s:networks/nw-s:network/"
       + "l3t-s:l3-topology-attributes" {
       when "../nw-s:network-types/l3t-s:l3-unicast-topology/"
         + "l3tet-s:l3-te" {
         description "Augment only for L3 TE topology";
       }
       description "Augment topology configuration";
       uses l3tet:l3-te-topology-attributes;
     }

     augment "/nw-s:networks/nw-s:network/nw-s:node/"
       + "l3t-s:l3-node-attributes" {
       when "../../nw-s:network-types/l3t-s:l3-unicast-topology/"
         + "l3tet-s:l3-te" {
         description "Augment only for L3 TE topology";
       }
       description "Augment node configuration";
       uses l3tet:l3-te-node-attributes;
     }

     augment "/nw-s:networks/nw-s:network/nw-s:node/"
       + "nt-s:termination-point/"
       + "l3t-s:l3-termination-point-attributes" {
       when "../../../nw-s:network-types/l3t-s:l3-unicast-topology/"
         + "l3tet-s:l3-te" {
         description "Augment only for L3 TE topology";
       }
       description "Augment termination point configuration";
       uses l3tet:l3-te-tp-attributes;
     }

     augment "/nw-s:networks/nw-s:network/nt-s:link/"
       + "l3t-s:l3-link-attributes" {
       when "../../nw-s:network-types/l3t-s:l3-unicast-topology/"
         + "l3tet-s:l3-te" {
         description "Augment only for L3 TE topology";
       }
       description "Augment link configuration";
       uses l3tet:l3-te-link-attributes;
     }
   }



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   <CODE ENDS>



A.2.  Packet Switching TE Topology State Module


   <CODE BEGINS> file "ietf-te-topology-packet-state@2018-06-22.yang"
   module ietf-te-topology-packet-state {
     yang-version 1.1;
     namespace
       "urn:ietf:params:xml:ns:yang:ietf-te-topology-packet-state";

     prefix "tet-pkt-s";

     import ietf-te-topology-packet {
       prefix "tet-pkt";
     }

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

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

     import ietf-te-topology-state {
       prefix "tet-s";
       reference
         "I-D.ietf-teas-yang-te-topo: YANG Data Model for Traffic
          Engineering (TE) Topologies";
     }

     import ietf-te-types {
       prefix "te-types";
       reference
         "I-D.ietf-teas-yang-te: A YANG Data Model for Traffic
          Engineering Tunnels and Interfaces";
     }

     organization
       "Traffic Engineering Architecture and Signaling (TEAS)
        Working Group";

     contact



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       "WG Web:   <http://tools.ietf.org/wg/teas/>
        WG List:  <mailto:teas@ietf.org>

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

        Editor:   Igor Bryskin
                  <mailto:Igor.Bryskin@huawei.com>

        Editor:   Vishnu Pavan Beeram
                  <mailto:vbeeram@juniper.net>

        Editor:   Tarek Saad
                  <mailto:tsaad@cisco.com>

        Editor:   Himanshu Shah
                  <mailto:hshah@ciena.com>

        Editor:   Oscar Gonzalez De Dios
                  <mailto:oscar.gonzalezdedios@telefonica.com>";

     description
       "YANG data model for representing operational state information
        of PSC (Packet Switching) TE Topologies, when NMDA is not
         supported.

        Copyright (c) 2018 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).

        This version of this YANG module is part of RFC XXXX; see the
        RFC itself for full legal notices.";

     revision 2018-06-22 {
       description "Initial revision";
       reference "RFC XXXX: YANG Data Model for Layer 3 TE Topologies";
     }

     /*
      * Augmentations
      */
     /* Augmentations to connectivity-matrix */



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     augment "/nw-s:networks/nw-s:network/nw-s:node/tet-s:te/"
       + "tet-s:te-node-attributes/tet-s:connectivity-matrices" {
       description
         "Parameters for PSC (Packet Switching) TE topology.";
       uses te-types:performance-metric-container {
         if-feature tet-pkt:te-performance-metric;
       }
     }

     augment "/nw-s:networks/nw-s:network/nw-s:node/tet-s:te/"
           + "tet-s:te-node-attributes/tet-s:connectivity-matrices/"
           + "tet-s:connectivity-matrix" {
       description
         "Parameters for PSC TE topology.";
       uses te-types:performance-metric-container {
         if-feature tet-pkt:te-performance-metric;
       }
     }

     augment "/nw-s:networks/nw-s:network/nw-s:node/tet-s:te/"
           + "tet-s:information-source-entry/"
           + "tet-s:connectivity-matrices" {
       description
         "Parameters for PSC TE topology.";
       uses te-types:performance-metric-container {
         if-feature tet-pkt:te-performance-metric;
       }
     }

     augment "/nw-s:networks/nw-s:network/nw-s:node/tet-s:te/"
           + "tet-s:information-source-entry/"
           + "tet-s:connectivity-matrices/"
           + "tet-s:connectivity-matrix" {
       description
         "Parameters for PSC TE topology.";
       uses te-types:performance-metric-container {
         if-feature tet-pkt:te-performance-metric;
       }
     }

     /* Augmentations to tunnel-termination-point */
     augment "/nw-s:networks/nw-s:network/nw-s:node/tet-s:te/"
           + "tet-s:tunnel-termination-point/"
           + "tet-s:local-link-connectivities" {
       description
         "Parameters for PSC TE topology.";
       uses te-types:performance-metric-container {
         if-feature tet-pkt:te-performance-metric;



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       }
     }

     augment "/nw-s:networks/nw-s:network/nw-s:node/tet-s:te/"
           + "tet-s:tunnel-termination-point/"
           + "tet-s:local-link-connectivities/"
           + "tet-s:local-link-connectivity" {
       description
         "Parameters for PSC TE topology.";
       uses te-types:performance-metric-container {
         if-feature tet-pkt:te-performance-metric;
       }
     }

     /* Augmentations to te-link-attributes */
     augment "/nw-s:networks/tet-s:te/tet-s:templates/"
           + "tet-s:link-template/tet-s:te-link-attributes" {
       when "tet-s:interface-switching-capability "
         + "[tet-s:switching-capability = 'te-types:switching-psc1']" {
         description "Valid only for PSC";
       }
       description
         "Parameters for PSC TE topology.";
       uses te-types:performance-metric-container {
         if-feature tet-pkt:te-performance-metric;
       }
     }

     augment "/nw-s:networks/nw-s:network/nt-s:link/tet-s:te/"
           + "tet-s:te-link-attributes" {
       when "tet-s:interface-switching-capability "
         + "[tet-s:switching-capability = 'te-types:switching-psc1']" {
         description "Valid only for PSC";
       }
       description
         "Parameters for PSC TE topology.";
       uses te-types:performance-metric-container {
         if-feature tet-pkt:te-performance-metric;
       }
     }

     augment "/nw-s:networks/nw-s:network/nt-s:link/tet-s:te/"
           + "tet-s:information-source-entry" {
       when "tet-s:interface-switching-capability "
         + "[tet-s:switching-capability = 'te-types:switching-psc1']" {
         description "Valid only for PSC";
       }
       description



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         "Parameters for PSC TE topology.";
       uses te-types:performance-metric-container {
         if-feature tet-pkt:te-performance-metric;
       }
     }

     /* Augmentations to interface-switching-capability */
     augment "/nw-s:networks/tet-s:te/tet-s:templates/"
           + "tet-s:link-template/tet-s:te-link-attributes/"
           + "tet-s:interface-switching-capability" {
       when "tet-s:switching-capability = 'te-types:switching-psc1' " {
         description "Valid only for PSC";
       }
       description
         "Parameters for PSC TE topology.";
       uses tet-pkt:packet-switch-capable-container;
     }

     augment "/nw-s:networks/nw-s:network/nt-s:link/tet-s:te/"
           + "tet-s:te-link-attributes/"
           + "tet-s:interface-switching-capability" {
       when "tet-s:switching-capability = 'te-types:switching-psc1' " {
         description "Valid only for PSC";
       }
       description
         "Parameters for PSC TE topology.";
       uses tet-pkt:packet-switch-capable-container;
     }

     augment "/nw-s:networks/nw-s:network/nt-s:link/tet-s:te/"
           + "tet-s:information-source-entry/"
           + "tet-s:interface-switching-capability" {
       when "tet-s:switching-capability = 'te-types:switching-psc1' " {
         description "Valid only for PSC";
       }
       description
         "Parameters for PSC TE topology.";
       uses tet-pkt:packet-switch-capable-container;
     }
   }
   <CODE ENDS>










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Authors' Addresses

   Xufeng Liu
   Volta Networks

   EMail: xufeng.liu.ietf@gmail.com


   Igor Bryskin
   Huawei Technologies

   EMail: Igor.Bryskin@huawei.com


   Vishnu Pavan Beeram
   Juniper Networks

   EMail: vbeeram@juniper.net


   Tarek Saad
   Cisco Systems Inc

   EMail: tsaad@cisco.com


   Himanshu Shah
   Ciena

   EMail: hshah@ciena.com


   Oscar Gonzalez de Dios
   Telefonica

   EMail: oscar.gonzalezdedios@telefonica.com















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