TEAS Working Group                                             V. Beeram
Internet-Draft                                          Juniper Networks
Intended status: Standards Track                                 T. Saad, Ed. Saad
Expires: August April 23, 2018 2019                                        R. Gandhi
                                                     Cisco Systems, Inc.
                                                                  X. Liu
                                                                   Jabil
                                                          Volta Networks
                                                              I. Bryskin
                                                     Huawei Technologies
                                                                 H. Shah
                                                                   Ciena
                                                       February 19,
                                                        October 20, 2018

                     A YANG Data Model for RSVP-TE
                    draft-ietf-teas-yang-rsvp-te-03
                    draft-ietf-teas-yang-rsvp-te-04

Abstract

   This document defines a YANG data model for the configuration and
   management of RSVP (Resource Reservation Protocol) to establish
   Traffic-Engineered (TE) Label-Switched Paths (LSPs) for MPLS (Multi-
   Protocol Label Switching) and other technologies.

   The model defines a generic RSVP-TE module for signaling LSPs that is
   technology agnostic.  The generic RSVP-TE module is to be augmented
   by technology specific RSVP-TE modules that define technology
   specific data.  This document also defines the augmentation for RSVP-TE RSVP-
   TE MPLS LSPs model.

   This model covers data for the configuration, operational state,
   remote procedural calls, and event notifications.

Status of This Memo

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   provisions of BCP 78 and BCP 79.

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   This Internet-Draft will expire on August April 23, 2018. 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
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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   3
     1.2.  Tree Diagram  . . . . . . . . . . . . . . . . . . . . . .   3
     1.3.  Prefixes in Data Node Names . . . . . . . . . . . . . . .   4   3
   2.  Design Considerations  Model Overview  . . . . . . . . . . . . . . . . . . . .   5 . . .   4
     2.1.  Module Hierarchy  . Relationship . . . . . . . . . . . . . . . . . . .   5   4
     2.2.  RSVP-TE Generic  Model Tree Diagrams . . . . . . . . . . . . . . . . . . .   6   5
       2.2.1.  RSVP-TE Model Tree Diagram  . . . . . . . . . . . . . . . . . . . .   6   5
       2.2.2.  YANG Module . . . . . . . . . .  RSVP-TE MPLS Model Tree Diagram . . . . . . . . . . .  14  13
     2.3.  RSVP-TE MPLS Model  YANG Modules  . . . . . . . . . . . . . . . . . . .  26
       2.3.1.  Tree Diagram . . .  16
       2.3.1.  RSVP-TE YANG Module . . . . . . . . . . . . . . . . .  26  16
       2.3.2.  RSVP-TE MPLS YANG Module  . . . . . . . . . . . . . . . . . . . . .  28  27
   3.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  41  40
   4.  Security Considerations . . . . . . . . . . . . . . . . . . .  41  40
   5.  Acknowledgement . . . . . . . . . . . . . . . . . . . . . . .  42  41
   6.  Contributors  . . . . . . . . . . . . . . . . . . . . . . . .  42  41
   7.  Normative References  . . . . . . . . . . . . . . . . . . . .  42
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  43  44

1.  Introduction

   YANG [RFC6020] [RFC7950] is a data definition modeling language that was introduced to
   define the contents of a conceptual data store that allows networked
   devices to be managed using NETCONF [RFC6241].  YANG is proving has proved
   relevant beyond its initial confines, as bindings to other interfaces
   (e.g.  ReST)  RESTCONF [RFC8040]) and encoding other than XML (e.g.  JSON)
   are being defined.  Furthermore, YANG data models can be used as the
   basis of implementation for other interfaces, such as CLI and
   programmatic APIs.

   This document defines a generic YANG data model for configuring and
   managing RSVP-TE LSP(s) [RFC3209].  The RSVP-TE generic model
   augments the RSVP base and extended models defined in
   [I-D.ietf-teas-yang-rsvp], and adds TE extensions to the RSVP
   protocol [RFC2205] model configuration and state data.  The
   technology specific RSVP-TE models augment the generic RSVP-TE model
   with additional technology specific parameters.  For example, this
   document also defines the MPLS RSVP-TE model for configuring and
   managing MPLS RSVP TE LSP(s).

   In addition to augmenting the RSVP YANG module, the modules defined
   in this document augment the TE Interfaces, Tunnels and LSP(s) YANG
   module defined in [I-D.ietf-teas-yang-te] to define additional
   parameters to enable signaling for RSVP-TE.

1.1.  Terminology

   In this document, the

   The key words "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, RFC 2119
   [RFC2119].

1.2.  Tree Diagram

   A simplified graphical representation of the data model is presented
   14 [RFC2119] [RFC8174] when, and only when, they appear in each section of the model. all
   capitals, as shown here.

   The following notations are used terminology for
   the describing YANG model data tree representation.

   <status> <flags> <name> <opts> <type>

    <status> is one of:
      +  for current
      x  for deprecated
      o  for obsolete

    <flags> is one of:
      rw  for read-write configuration data
      ro  for read-only non-configuration data
      -x  for execution rpcs
      -n  for notifications

    <name> is the name of the node

   If the node is augmented into the tree from another module, its name
   is printed as <prefix>:<name>

    <opts> is one of:
      ? for an optional leaf or node
      ! for a presence container
      * for a leaf-list or list
      Brackets [<keys>] for a list's keys
      Curly braces {<condition>} for optional feature that make node
   conditional
      Colon : for marking case nodes
      Ellipses ("...") subtree contents not shown

      Parentheses enclose choice and case nodes, and case nodes are also
      marked with a colon (":").

    <type> models is the name of the type for leafs and leaf-lists.

1.3. found in
   [RFC7950].

1.2.  Prefixes in Data Node Names

   In this document, names of data nodes and other data model objects
   are prefixed using the standard prefix associated with the
   corresponding YANG imported modules, as shown in Table 1.

           +---------------+--------------------+---------------+

  +---------------+--------------------+-------------------------------+
  | Prefix        | YANG module        | Reference                     |
           +---------------+--------------------+---------------+
  +---------------+--------------------+-------------------------------+
  | yang          | ietf-yang-types    | [RFC6991]                     |
  | inet          | ietf-inet-types    | [RFC6991]                     |
  | te            | ietf-te            | this document [I-D.ietf-teas-yang-te]       |
  | rsvp          | ietf-rsvp          | [I-D.ietf-teas-yang-rsvp]     |
  | te-dev        | ietf-te-device     | [I-D.ietf-teas-yang-te]       |
  | te-types      | ietf-te-types      | this document [I-D.ietf-teas-yang-te-types] |
  | te-mpls-types | ietf-te-mpls-types | this document [I-D.ietf-teas-yang-te-types] |
  | te-dev rsvp-te       | ietf-te-device ietf-rsvp-te       | this document                 |
  | te-mpls rsvp-te-mpls  | ietf-te-mpls ietf-rsvp-te-mpls  | this document                 |
           | te-sr-mpls    | ietf-te-sr-mpls    | this document |
           +---------------+--------------------+---------------+
  +---------------+--------------------+-------------------------------+

             Table 1: Prefixes and corresponding YANG modules

2.  Design Considerations  Model Overview

   The RSVP-TE generic model augments the RSVP base and extended YANG
   models defined in [I-D.ietf-teas-yang-rsvp].  It also augments the TE
   tunnels and interfaces module defined in [I-D.ietf-teas-yang-te] to
   cover parameters specific to the configuration and management of
   RSVP-TE interfaces, tunnels and LSP(s).

   The RSVP-TE MPLS YANG model augments the RSVP-TE generic model with
   parameters to configure and manage signaling of MPLS RSVP-TE LSPs.
   RSVP-TE model augmentation for other dataplane technologies (e.g.
   OTN or WDM) are outside the scope of this document.

   There are three types of configuration and state data nodes in
   module(s) defined in this document:

   o  those augmenting or extending the base RSVP module that is defined
      in [I-D.ietf-teas-yang-rsvp]

   o  those augmenting or extending the base TE module defined in
      [I-D.ietf-teas-yang-te]

   o  those that are specific to the RSVP-TE and RSVP-TE MPLS modules
      defined in this document.

2.1.  Module Hierarchy Relationship

   The data pertaining to RSVP-TE in this document is divided into two
   modules: a technology agnostic RSVP-TE module that holds generic
   parameters for RSVP-TE applicable to all technologies, and a MPLS
   technology specific RSVP-TE module (e.g. for MPLS RSVP-TE) that holds parameters specific to the
   MPLS technology.

   This document defines

   The RSVP-TE generic YANG data models for RSVP-TE, module "ietf-rsvp-te" imports the following
   modules:

   o  ietf-rsvp defined in [I-D.ietf-teas-yang-rsvp]

   o  ietf-routing-types defined in [RFC8294]

   o  ietf-te-types defined in [I-D.ietf-teas-yang-te-types]

   o  ietf-te and ietf-te-dev defined in [I-D.ietf-teas-yang-te]

   The RSVP-TE MPLS
   configuration, state, notification YANG module "ietf-te-device" imports the following
   module(s):

   o  ietf-rsvp defined in [I-D.ietf-teas-yang-rsvp]
   o  ietf-routing-types defined in [RFC8294]

   o  ietf-te-mpls-types defined in [I-D.ietf-teas-yang-te-types]

   o  ietf-te and RPCs. ietf-te-dev defined in [I-D.ietf-teas-yang-te]

   The relationship between the different modules is depicted shown in Figure 1.

     TE basic       +---------+        ^: import
     module         | ietf-te |        o: augment
                    +---------+
                       |
                         o
                         |
                         |
                       v   |
                    +--------------+
     RSVP-TE module | ietf-rsvp-te |o . . .
                    +--------------+         \
                       ^
                         |                    \
                       |
                         o               +-------------------+                 +--------------------+
                    +-----------+          | ietf-rsvp-otn-te ietf-rsvp-te-mpls  |
     RSVP module    | ietf-rsvp |          +-------------------+          +--------------------+
                    +-----------+             RSVP-TE with OTN MPLS
                         o                    extensions
                         |                   (shown for illustration
     RSVP extended       |                    not in this document)
       module       +--------------------+
                    | ietf-rsvp-extended |
                    +--------------------+

       Figure 1: Relationship of RSVP and RSVP-TE modules with other
                             protocol modules

2.2.  RSVP-TE Generic  Model

   The RSVP-TE generic module augments Tree Diagrams

   A full tree diagram of the RSVP base and extended YANG
   modules module(s) defined in [I-D.ietf-teas-yang-rsvp]  as well this document as per
   the TE
   tunnels and interfaces module [I-D.ietf-teas-yang-te] to cover
   parameters specific to the configuration and management of RSVP-TE
   interfaces, tunnels and LSP(s). syntax defined in [RFC8340] are given in subsequent sections.

2.2.1.  RSVP-TE Model Tree Diagram

   There are three types of configuration and state data nodes in this
   module:

   o  those augmenting or extending the base RSVP module

   o  those augmenting or extending the base TE module

   o  those that are specific to

   Figure 2 shows the RSVP-TE module

   Below is a YANG tree representation for data items defined in diagram of the RSVP-TE generic module: YANG
   model defined in module ietf-rsvp-te.yang.

 module: ietf-rsvp-te
   augment
   /rt:routing/rt:control-plane-protocols/rt:control-plane-protocol/
   rsvp:rsvp/rsvp:globals:
     +--rw global-soft-preemption!
        +--rw soft-preemption-timeout?   uint16

   augment
   /rt:routing/rt:control-plane-protocols/rt:control-plane-protocol/
   rsvp:rsvp/rsvp:interfaces:
     +--rw rsvp-te-interface-attributes
        +--ro state
   augment
   /rt:routing/rt:control-plane-protocols/rt:control-plane-protocol/
   rsvp:rsvp/rsvp:interfaces/rsvp:interface:
     +--rw rsvp-te-interface-attributes
        +--ro state
   augment
   /rt:routing/rt:control-plane-protocols/rt:control-plane-protocol/
   rsvp:rsvp/rsvp:globals/rsvp:sessions/rsvp:session/rsvp:state/
   rsvp:psbs/rsvp:psb:
     +--ro tspec-average-rate?   rt-types:bandwidth-ieee-float32
     +--ro tspec-size?           rt-types:bandwidth-ieee-float32
     +--ro tspec-peak-rate?      rt-types:bandwidth-ieee-float32
     +--ro min-policed-unit?     uint32
     +--ro max-packet-size?      uint32
   augment
   /rt:routing/rt:control-plane-protocols/rt:control-plane-protocol/
   rsvp:rsvp/rsvp:globals/rsvp:sessions/rsvp:session/rsvp:state/
   rsvp:rsbs/rsvp:rsb:
     +--ro fspec-average-rate?   rt-types:bandwidth-ieee-float32
     +--ro fspec-size?           rt-types:bandwidth-ieee-float32
     +--ro fspec-peak-rate?      rt-types:bandwidth-ieee-float32
     +--ro min-policed-unit?     uint32
     +--ro max-packet-size?      uint32
   augment
   /rt:routing/rt:control-plane-protocols/rt:control-plane-protocol/
   rsvp:rsvp/rsvp:neighbors:
   augment /te:te/te:tunnels/te:tunnel:
     +--rw lsp-signaled-name?           string
     +--rw local-recording-desired?     boolean
     +--rw se-style-desired?            boolean
     +--rw path-reevaluation-request?   boolean
     +--rw soft-preemption-desired?     boolean
     +--rw lsp-rerouting?               enumeration
     +--rw lsp-integrity-required?      boolean
     +--rw lsp-contiguous?              boolean
     +--rw lsp-stitching-desired?       boolean
     +--rw lsp-preplanned?              boolean
     +--rw lsp-oob-mapping?             boolean
     +--rw retry-timer?                 uint16
   augment /te:te/te:tunnels/te:tunnel/te:state:
     +--ro lsp-signaled-name?           string
     +--ro local-recording-desired?     boolean
     +--ro se-style-desired?            boolean
     +--ro path-reevaluation-request?   boolean
     +--ro soft-preemption-desired?     boolean
     +--ro lsp-rerouting?               enumeration
     +--ro lsp-integrity-required?      boolean
     +--ro lsp-contiguous?              boolean
     +--ro lsp-stitching-desired?       boolean
     +--ro lsp-preplanned?              boolean
     +--ro lsp-oob-mapping?             boolean
     +--ro retry-timer?                 uint16
   augment /te:te/te:lsps-state/te:lsp:
     +--ro associated-rsvp-session?            ->
     /rt:routing/control-plane-protocols/control-plane-protocol/
     rsvp:rsvp/globals/sessions/session/local-index
     +--ro lsp-signaled-name?                  string
     +--ro local-recording-desired?            boolean
     +--ro se-style-desired?                   boolean
     +--ro path-reevaluation-request?          boolean
     +--ro soft-preemption-desired?            boolean
     +--ro lsp-rerouting?                      enumeration
     +--ro lsp-integrity-required?             boolean
     +--ro lsp-contiguous?                     boolean
     +--ro lsp-stitching-desired?              boolean
     +--ro lsp-preplanned?                     boolean
     +--ro lsp-oob-mapping?                    boolean
     +--ro explicit-route-objects
     |  +--ro incoming-explicit-route-hop* [index]
     |  |  +--ro index    -> ../state/index
     |  |  +--ro state
     |  |     +--ro index?            uint32
     |  |     +--ro (type)?
     |  |        +--:(numbered)
     |  |        |  +--ro numbered-hop
     |  |        |     +--ro address?     te-types:te-tp-id
     |  |        |     +--ro hop-type?    te-hop-type
     |  |        |     +--ro direction?   te-link-direction
     |  |        +--:(as-number)
     |  |        |  +--ro as-number-hop
     |  |        |     +--ro as-number?   binary
     |  |        |     +--ro hop-type?    te-hop-type
     |  |        +--:(unnumbered)
     |  |        |  +--ro unnumbered-hop
     |  |        |     +--ro node-id?      te-types:te-node-id
     |  |        |     +--ro link-tp-id?   te-types:te-tp-id
     |  |        |     +--ro hop-type?     te-hop-type
     |  |        |     +--ro direction?    te-link-direction
     |  |        +--:(label)
     |  |           +--ro label-hop
     |  |              +--ro te-label
     |  |                 +--ro (technology)?
     |  |                 |  +--:(generic)
     |  |                 |     +--ro generic?
     rt-types:generalized-label
     |  |                 +--ro direction?   te-label-direction
     |  +--ro outgoing-explicit-route-hop* [index]
     |     +--ro index    -> ../state/index
     |     +--ro state
     |        +--ro index?            uint32
     |        +--ro (type)?
     |           +--:(numbered)
     |           |  +--ro numbered-hop
     |           |     +--ro address?     te-types:te-tp-id
     |           |     +--ro hop-type?    te-hop-type
     |           |     +--ro direction?   te-link-direction
     |           +--:(as-number)
     |           |  +--ro as-number-hop
     |           |     +--ro as-number?   binary
     |           |     +--ro hop-type?    te-hop-type
     |           +--:(unnumbered)
     |           |  +--ro unnumbered-hop
     |           |     +--ro node-id?      te-types:te-node-id
     |           |     +--ro link-tp-id?   te-types:te-tp-id
     |           |     +--ro hop-type?     te-hop-type
     |           |     +--ro direction?    te-link-direction
     |           +--:(label)
     |              +--ro label-hop
     |                 +--ro te-label
     |                    +--ro (technology)?
     |                    |  +--:(generic)
     |                    |     +--ro generic?
     rt-types:generalized-label
     |                    +--ro direction?   te-label-direction
     +--ro incoming-record-route-subobjects
     |  +--ro incoming-record-route-subobject* [index]
     |     +--ro index    -> ../state/index
     |     +--ro state
     |        +--ro index?         uint32
     |        +--ro (type)?
     |           +--:(numbered)
     |           |  +--ro address?       te-types:te-tp-id
     |           |  +--ro ip-flags?      binary
     |           +--:(unnumbered)
     |           |  +--ro node-id?       te-types:te-node-id
     |           |  +--ro link-tp-id?    te-types:te-tp-id
     |           +--:(label)
     |              +--ro value?         rt-types:generalized-label
     |              +--ro label-flags?   binary
     +--ro outgoing-record-route-subobjects
        +--ro outgoing-record-route-subobject* [index]
           +--ro index    -> ../state/index
           +--ro state
              +--ro index?         uint32
              +--ro (type)?
                 +--:(numbered)
                 |  +--ro address?       te-types:te-tp-id
                 |  +--ro ip-flags?      binary
                 +--:(unnumbered)
                 |  +--ro node-id?       te-types:te-node-id
                 |  +--ro link-tp-id?    te-types:te-tp-id
                 +--:(label)
                    +--ro value?         rt-types:generalized-label
                    +--ro label-flags?   binary
   augment
   /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths/te:p2p-primary-path/
   te:state/te:lsps/te:lsp:
     +--ro associated-rsvp-session?            ->
     /rt:routing/control-plane-protocols/control-plane-protocol/
     rsvp:rsvp/globals/sessions/session/local-index
     +--ro lsp-signaled-name?                  string
     +--ro local-recording-desired?            boolean
     +--ro se-style-desired?                   boolean
     +--ro path-reevaluation-request?          boolean
     +--ro soft-preemption-desired?            boolean
     +--ro lsp-rerouting?                      enumeration
     +--ro lsp-integrity-required?             boolean
     +--ro lsp-contiguous?                     boolean
     +--ro lsp-stitching-desired?              boolean
     +--ro lsp-preplanned?                     boolean
     +--ro lsp-oob-mapping?                    boolean
     +--ro explicit-route-objects
     |  +--ro incoming-explicit-route-hop* [index]
     |  |  +--ro index    -> ../state/index
     |  |  +--ro state
     |  |     +--ro index?            uint32
     |  |     +--ro (type)?
     |  |        +--:(numbered)
     |  |        |  +--ro numbered-hop
     |  |        |     +--ro address?     te-types:te-tp-id
     |  |        |     +--ro hop-type?    te-hop-type
     |  |        |     +--ro direction?   te-link-direction
     |  |        +--:(as-number)
     |  |        |  +--ro as-number-hop
     |  |        |     +--ro as-number?   binary
     |  |        |     +--ro hop-type?    te-hop-type
     |  |        +--:(unnumbered)
     |  |        |  +--ro unnumbered-hop
     |  |        |     +--ro node-id?      te-types:te-node-id
     |  |        |     +--ro link-tp-id?   te-types:te-tp-id
     |  |        |     +--ro hop-type?     te-hop-type
     |  |        |     +--ro direction?    te-link-direction
     |  |        +--:(label)
     |  |           +--ro label-hop
     |  |              +--ro te-label
     |  |                 +--ro (technology)?
     |  |                 |  +--:(generic)
     |  |                 |     +--ro generic?
     rt-types:generalized-label
     |  |                 +--ro direction?   te-label-direction
     |  +--ro outgoing-explicit-route-hop* [index]
     |     +--ro index    -> ../state/index
     |     +--ro state
     |        +--ro index?            uint32
     |        +--ro (type)?
     |           +--:(numbered)
     |           |  +--ro numbered-hop
     |           |     +--ro address?     te-types:te-tp-id
     |           |     +--ro hop-type?    te-hop-type
     |           |     +--ro direction?   te-link-direction
     |           +--:(as-number)
     |           |  +--ro as-number-hop
     |           |     +--ro as-number?   binary
     |           |     +--ro hop-type?    te-hop-type
     |           +--:(unnumbered)
     |           |  +--ro unnumbered-hop
     |           |     +--ro node-id?      te-types:te-node-id
     |           |     +--ro link-tp-id?   te-types:te-tp-id
     |           |     +--ro hop-type?     te-hop-type
     |           |     +--ro direction?    te-link-direction
     |           +--:(label)
     |              +--ro label-hop
     |                 +--ro te-label
     |                    +--ro (technology)?
     |                    |  +--:(generic)
     |                    |     +--ro generic?
     rt-types:generalized-label
     |                    +--ro direction?   te-label-direction
     +--ro incoming-record-route-subobjects
     |  +--ro incoming-record-route-subobject* [index]
     |     +--ro index    -> ../state/index
     |     +--ro state
     |        +--ro index?         uint32
     |        +--ro (type)?
     |           +--:(numbered)
     |           |  +--ro address?       te-types:te-tp-id
     |           |  +--ro ip-flags?      binary
     |           +--:(unnumbered)
     |           |  +--ro node-id?       te-types:te-node-id
     |           |  +--ro link-tp-id?    te-types:te-tp-id
     |           +--:(label)
     |              +--ro value?         rt-types:generalized-label
     |              +--ro label-flags?   binary
     +--ro outgoing-record-route-subobjects
        +--ro outgoing-record-route-subobject* [index]
           +--ro index    -> ../state/index
           +--ro state
              +--ro index?         uint32
              +--ro (type)?
                 +--:(numbered)
                 |  +--ro address?       te-types:te-tp-id
                 |  +--ro ip-flags?      binary
                 +--:(unnumbered)
                 |  +--ro node-id?       te-types:te-node-id
                 |  +--ro link-tp-id?    te-types:te-tp-id
                 +--:(label)
                    +--ro value?         rt-types:generalized-label
                    +--ro label-flags?   binary
   augment
   /te:te/te:tunnels/te:tunnel/te:p2p-secondary-paths/
   te:p2p-secondary-path/te:state/te:lsps/te:lsp:
     +--ro associated-rsvp-session?            ->
     /rt:routing/control-plane-protocols/control-plane-protocol/
     rsvp:rsvp/globals/sessions/session/local-index
     +--ro lsp-signaled-name?                  string
     +--ro local-recording-desired?            boolean
     +--ro se-style-desired?                   boolean
     +--ro path-reevaluation-request?          boolean
     +--ro soft-preemption-desired?            boolean
     +--ro lsp-rerouting?                      enumeration
     +--ro lsp-integrity-required?             boolean
     +--ro lsp-contiguous?                     boolean
     +--ro lsp-stitching-desired?              boolean
     +--ro lsp-preplanned?                     boolean
     +--ro lsp-oob-mapping?                    boolean
     +--ro explicit-route-objects
     |  +--ro incoming-explicit-route-hop* [index]
     |  |  +--ro index    -> ../state/index
     |  |  +--ro state
     |  |     +--ro index?            uint32
     |  |     +--ro (type)?
     |  |        +--:(numbered)
     |  |        |  +--ro numbered-hop
     |  |        |     +--ro address?     te-types:te-tp-id
     |  |        |     +--ro hop-type?    te-hop-type
     |  |        |     +--ro direction?   te-link-direction
     |  |        +--:(as-number)
     |  |        |  +--ro as-number-hop
     |  |        |     +--ro as-number?   binary
     |  |        |     +--ro hop-type?    te-hop-type
     |  |        +--:(unnumbered)
     |  |        |  +--ro unnumbered-hop
     |  |        |     +--ro node-id?      te-types:te-node-id
     |  |        |     +--ro link-tp-id?   te-types:te-tp-id
     |  |        |     +--ro hop-type?     te-hop-type
     |  |        |     +--ro direction?    te-link-direction
     |  |        +--:(label)
     |  |           +--ro label-hop
     |  |              +--ro te-label
     |  |                 +--ro (technology)?
     |  |                 |  +--:(generic)
     |  |                 |     +--ro generic?
     rt-types:generalized-label
     |  |                 +--ro direction?   te-label-direction
     |  +--ro outgoing-explicit-route-hop* [index]
     |     +--ro index    -> ../state/index
     |     +--ro state
     |        +--ro index?            uint32
     |        +--ro (type)?
     |           +--:(numbered)
     |           |  +--ro numbered-hop
     |           |     +--ro address?     te-types:te-tp-id
     |           |     +--ro hop-type?    te-hop-type
     |           |     +--ro direction?   te-link-direction
     |           +--:(as-number)
     |           |  +--ro as-number-hop
     |           |     +--ro as-number?   binary
     |           |     +--ro hop-type?    te-hop-type
     |           +--:(unnumbered)
     |           |  +--ro unnumbered-hop
     |           |     +--ro node-id?      te-types:te-node-id
     |           |     +--ro link-tp-id?   te-types:te-tp-id
     |           |     +--ro hop-type?     te-hop-type
     |           |     +--ro direction?    te-link-direction
     |           +--:(label)
     |              +--ro label-hop
     |                 +--ro te-label
     |                    +--ro (technology)?
     |                    |  +--:(generic)
     |                    |     +--ro generic?
     rt-types:generalized-label
     |                    +--ro direction?   te-label-direction
     +--ro incoming-record-route-subobjects
     |  +--ro incoming-record-route-subobject* [index]
     |     +--ro index    -> ../state/index
     |     +--ro state
     |        +--ro index?         uint32
     |        +--ro (type)?
     |           +--:(numbered)
     |           |  +--ro address?       te-types:te-tp-id
     |           |  +--ro ip-flags?      binary
     |           +--:(unnumbered)
     |           |  +--ro node-id?       te-types:te-node-id
     |           |  +--ro link-tp-id?    te-types:te-tp-id
     |           +--:(label)
     |              +--ro value?         rt-types:generalized-label
     |              +--ro label-flags?   binary
     +--ro outgoing-record-route-subobjects
        +--ro outgoing-record-route-subobject* [index]
           +--ro index    -> ../state/index
           +--ro state
              +--ro index?         uint32
              +--ro (type)?
                 +--:(numbered)
                 |  +--ro address?       te-types:te-tp-id
                 |  +--ro ip-flags?      binary
                 +--:(unnumbered)
                 |  +--ro node-id?       te-types:te-node-id
                 |  +--ro link-tp-id?    te-types:te-tp-id
                 +--:(label)
                    +--ro value?         rt-types:generalized-label
                    +--ro label-flags?   binary
   augment /te:te/te-dev:interfaces/te-dev:interface:

                   Figure 2: RSVP-TE model Tree diagram

2.2.2.  RSVP-TE MPLS Model Tree Diagram

   Figure 5 shows the YANG Module

   <CODE BEGINS> file "ietf-rsvp-te@2018-02-19.yang"
   module ietf-rsvp-te {

     namespace "urn:ietf:params:xml:ns:yang:ietf-rsvp-te";

     prefix "rsvp-te";
     import ietf-rsvp {
       prefix rsvp;
     }

     import ietf-routing {
       prefix "rt";
     }

     import ietf-routing-types {
       prefix rt-types;
     }

     import ietf-te {
       prefix te;
     }

     import ietf-te-device {
       prefix te-dev;
     }

     /* Import TE generic types */
     import ietf-te-types {
       prefix te-types;
     }

     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>

        WG Chair: Lou Berger
                  <mailto:lberger@labn.net>

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

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

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

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

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

        Editor:   Xufeng Liu
                  <mailto:xliu@kuatrotech.com>

        Editor:   Xia Chen
                  <mailto:jescia.chenxia@huawei.com>

        Editor:   Raqib Jones
                  <mailto:raqib@Brocade.com>

        Editor:   Bin Wen
                  <mailto:Bin_Wen@cable.comcast.com>";

     description
       "This module contains tree diagram of the RSVP-TE MPLS YANG generic data model.";

     revision "2018-02-19" {
       description "Latest revision to model
   defined in module ietf-rsvp-te-mpls.yang and that augments RSVP-TE generic
   module as well as RSVP and TE YANG module";
       reference "RFC2205, RFC3209, etc.";
     }

     /**
      * RSVP-TE LSPs groupings.
      */

     grouping lsp-record-route-information_state {
       description "recorded route information grouping";
       container incoming-record-route-subobjects {
         description "RSVP recorded route object incoming information";
         list modules.

   module: ietf-rsvp-te-mpls
     augment /rt:routing/rt:control-plane-protocols/
     rt:control-plane-protocol/rsvp:rsvp:
       +--rw fast-reroute-local-revertive
          +--rw rsvp-frr-local-revert-delay?   uint32
     augment /rt:routing/rt:control-plane-protocols/
     rt:control-plane-protocol/rsvp:rsvp/rsvp:interfaces:

     augment /rt:routing/rt:control-plane-protocols/
     rt:control-plane-protocol/rsvp:rsvp/rsvp:interfaces/rsvp:interface:
     augment /rt:routing/rt:control-plane-protocols/
     rt:control-plane-protocol/rsvp:rsvp/rsvp:globals/
     rsvp:sessions/rsvp:session/rsvp:state:
     augment /rt:routing/rt:control-plane-protocols/
     rt:control-plane-protocol/rsvp:rsvp/rsvp:neighbors:
     augment /te:te/te:tunnels/te:tunnel:
       +--rw local-protection-desired?       empty
       +--rw bandwidth-protection-desired?   empty
       +--rw node-protection-desired?        empty
       +--rw non-php-desired?                empty
       +--rw entropy-label-cap?              empty
       +--rw oam-mep-entities-desired?       empty
       +--rw oam-mip-entities-desired?       empty
     augment /te:te/te:lsps-state/te:lsp:
       +--ro state
       |  +--ro local-protection-desired?       empty
       |  +--ro bandwidth-protection-desired?   empty
       |  +--ro node-protection-desired?        empty
       |  +--ro non-php-desired?                empty
       |  +--ro entropy-label-cap?              empty
       |  +--ro oam-mep-entities-desired?       empty
       |  +--ro oam-mip-entities-desired?       empty
       +--ro backup-info
          +--ro state
             +--ro backup-tunnel-name?         string
             +--ro backup-frr-on?              uint8
             +--ro backup-protected-lsp-num?   uint32
     augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths/
     te:p2p-primary-path/te:state/te:lsps/te:lsp:
       +--ro state
       |  +--ro local-protection-desired?       empty
       |  +--ro bandwidth-protection-desired?   empty
       |  +--ro node-protection-desired?        empty
       |  +--ro non-php-desired?                empty
       |  +--ro entropy-label-cap?              empty
       |  +--ro oam-mep-entities-desired?       empty
       |  +--ro oam-mip-entities-desired?       empty
       +--ro backup-info
          +--ro state
             +--ro backup-tunnel-name?         string
             +--ro backup-frr-on?              uint8
             +--ro backup-protected-lsp-num?   uint32
     augment /te:te/te:tunnels/te:tunnel/te:p2p-secondary-paths/
     te:p2p-secondary-path/te:state/te:lsps/te:lsp:
       +--ro state
       |  +--ro local-protection-desired?       empty
       |  +--ro bandwidth-protection-desired?   empty
       |  +--ro node-protection-desired?        empty
       |  +--ro non-php-desired?                empty
       |  +--ro entropy-label-cap?              empty
       |  +--ro oam-mep-entities-desired?       empty
       |  +--ro oam-mip-entities-desired?       empty
       +--ro backup-info
          +--ro state
             +--ro backup-tunnel-name?         string
             +--ro backup-frr-on?              uint8
             +--ro backup-protected-lsp-num?   uint32
     augment /te:te/te-dev:interfaces/te-dev:interface:
       +--rw bandwidth-mpls-reservable
          +--rw (bandwidth-value)?
          |  +--:(absolute)
          |  |  +--rw absolute-value?   uint32
          |  +--:(percentage)
          |     +--rw percent-value?    uint32
          +--rw (bc-model-type)?
             +--:(bc-model-rdm)
             |  +--rw bc-model-rdm
             |     +--rw bandwidth-mpls-constraints
             |        +--rw maximum-reservable?   uint32
             |        +--rw bc-value*             uint32
             +--:(bc-model-mam)
             |  +--rw bc-model-mam
             |     +--rw bandwidth-mpls-constraints
             |        +--rw maximum-reservable?   uint32
             |        +--rw bc-value*             uint32
             +--:(bc-model-mar)
                +--rw bc-model-mar
                   +--rw bandwidth-mpls-constraints
                      +--rw maximum-reservable?   uint32
                      +--rw bc-value*             uint32
     augment /te:te/te-dev:interfaces/te-dev:interface:
       +--rw rsvp-te-frr-backups
          +--rw (type)?
             +--:(static-tunnel)
             |  +--rw static-backups
             |     +--rw static-backup* [backup-tunnel-name]
             |        +--rw backup-tunnel-name ->
             /te:te/tunnels/tunnel/name
             +--:(auto-tunnel)
                +--rw auto-tunnel-backups
                   +--rw auto-backup-protection?         identityref
                   +--rw auto-backup-path-computation?   identityref

                    Figure 3: RSVP-TE MPLS Tree diagram

2.3.  YANG Modules

2.3.1.  RSVP-TE YANG Module

   <CODE BEGINS> file "ietf-rsvp-te@2018-10-20.yang"
   module ietf-rsvp-te {
     yang-version 1.1;

     namespace "urn:ietf:params:xml:ns:yang:ietf-rsvp-te";

     prefix "rsvp-te";

     import ietf-rsvp {
       prefix rsvp;
       reference "draft-ietf-teas-yang-rsvp: A YANG Data Model for
                  Resource Reservation Protocol (RSVP)";
     }

     import ietf-routing {
       prefix "rt";
       reference "RFC8349: A YANG Data Model for Routing Management";
     }

     import ietf-routing-types {
       prefix rt-types;
       reference "RFC8294: Common YANG Data Types for the Routing Area";
     }

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

     import ietf-te-device {
       prefix te-dev;
       reference "draft-ietf-teas-yang-te: A YANG Data Model for Traffic
                  Engineering Tunnels and Interfaces";
     }

     /* Import TE generic types */
     import ietf-te-types {
       prefix te-types;
       reference "draft-ietf-teas-yang-te-types: A YANG Data Model for
                  Common Traffic Engineering Types";
     }

     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>

        WG Chair: Lou Berger
                  <mailto:lberger@labn.net>

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

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

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

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

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

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

        Editor:   Xia Chen
                  <mailto:jescia.chenxia@huawei.com>

        Editor:   Raqib Jones
                  <mailto:raqib@Brocade.com>

        Editor:   Bin Wen
                  <mailto:Bin_Wen@cable.comcast.com>";

     description
       "This module contains the RSVP-TE YANG generic data model.";

     revision "2018-10-20" {
       description "Latest revision to RSVP-TE generic YANG module";
       reference "RFC2205, RFC3209, etc.";
     }

     /**
      * RSVP-TE LSPs groupings.

      */

     grouping lsp-record-route-information_state {
       description "recorded route information grouping";
       container incoming-record-route-subobjects {
         description "RSVP recorded route object incoming information";
         list incoming-record-route-subobject {
           when "../../te:origin-type != 'ingress'" {
             description "Applicable on non-ingress LSPs only";
           }
           key "index";
           description
             "List of RSVP Path record-route objects";
           leaf index {
             type leafref {
               path "../state/index";
             }
             description "RRO subobject index";
           }
           container state {
             config false;
             description
               "State parameters for the record route hop";
             uses te-types:record-route-subobject_state;
           }
         }
       }
       container outgoing-record-route-subobjects {
         description "RSVP recorded route object outgoing information";
         list outgoing-record-route-subobject {
           when "../../te:origin-type != 'egress'" {
             description "Applicable on non-egress LSPs only";
           }
           key "index";
           description
             "List of RSVP Resv record-route objects";
           leaf index {
             type leafref {
               path "../state/index";
             }
             description "RRO subobject index";
           }
           container state {
             config false;
             description
               "State parameters for the record route hop";
             uses te-types:record-route-subobject_state;
           }

         }
       }
     }

     grouping lsp-explicit-route-information_state {
       description "RSVP-TE LSP explicit-route information";
       container explicit-route-objects {
         description "Explicit route object information";
         list incoming-explicit-route-hop {
           when "../../te:origin-type != 'ingress'" {
             description "Applicable on non-ingress LSPs only";
           }
           key "index";
           description
             "List of incoming RSVP Path explicit-route objects";
           leaf index {
             type leafref {
               path "../state/index";
             }
             description "ERO subobject index";
           }
           container state {
             config false;
             description
               "State parameters for the explicit route hop";
             leaf index {
               type uint32;
               description "ERO subobject index";
             }
             uses te-types:explicit-route-hop;
           }
         }
         list outgoing-explicit-route-hop {
           when "../../te:origin-type != 'egress'" {
             description "Applicable on non-egress LSPs only";
           }
           key "index";
           description
             "List of outgoing RSVP Path explicit-route objects";
           leaf index {
             type leafref {
               path "../state/index";
             }
             description "ERO subobject index";
           }
           container state {
             config false;
             description
               "State parameters for the explicit route hop";
             leaf index {
               type uint32;
               description "ERO subobject index";
             }
             uses te-types:explicit-route-hop;
           }
         }
       }
     }

     grouping lsp-attributes-flags_config {
       description
         "Configuration parameters relating to RSVP-TE LSP
         attribute flags";
       leaf lsp-rerouting {
         type enumeration {
           enum end-to-end-routing {
             description
               "End-to-end routing desired";
             reference "RFC4920, RFC5420";
           }
           enum boundary-rerouting {
             description
               "Boundary rerouting desired";
             reference "RFC4920, RFC5420";
           }
           enum segment-based-rerouting {
             description
               "Segment-based rerouting desired";
             reference "RFC4920, RFC5420";
           }
         }
         description "LSP rerouting types";
       }
       leaf lsp-integrity-required {
         type boolean;
         description "LSP integrity desired";
         reference "RFC4875";
       }
       leaf lsp-contiguous {
         type boolean;
         description "Contiguous LSP";
         reference "RFC5151";
       }
       leaf lsp-stitching-desired {
         type boolean;
         description "Stitched LSP";
         reference "RFC5150";
       }
       leaf lsp-preplanned {
         type boolean;
         description "Preplanned LSP";
         reference "RFC6001";
       }
       leaf lsp-oob-mapping {
         type boolean;
         description
           "Mapping is done out-of-band";
         reference "RFC6511";
       }
     }

     grouping lsp-session-attributes-obj-flags_config {
       description
         "Configuration parameters relating to RSVP-TE LSP
         session attribute flags";
       reference
         "RFC4859: Registry for RSVP-TE Session Flags";
       leaf local-recording-desired {
         type boolean;
         description "Path recording is desired.";
         reference "RFC3209";
       }
       leaf se-style-desired {
         type boolean;
         description "SE Style desired";
         reference "RFC3209";
       }
       leaf path-reevaluation-request {
         type boolean;
         description "Path re-evaluation request";
         reference "RFC4736";
       }
       leaf soft-preemption-desired {
         type boolean;
         description "Soft-preemption is desired";
         reference "RFC5712";
       }
     }

     grouping lsp-properties_config {
       description
         "Configuration parameters relating to RSVP-TE LSP
         session attribute flags";
       leaf lsp-signaled-name {
         type string;
         description
           "Sets the session name to use in the session
           attribute object.";
       }
       uses lsp-session-attributes-obj-flags_config;
       uses lsp-attributes-flags_config;
     }

     grouping tunnel-properties_config {
       description "RSVP-TE Tunnel properties grouping";
       leaf retry-timer {
         type uint16 {
           range 1..600;
         }
         units seconds;
         description
           "sets the time between attempts to establish the
            LSP";
       }
     }

     /*** End of RSVP-TE LSP groupings ***/

     /**
      * RSVP-TE generic global properties.
      */

     grouping global-soft-preemption_config {
       description
         "Configuration for global RSVP-TE soft preemption";
       leaf soft-preemption-timeout {
         type uint16 {
           range 0..300;
         }
         default 0;
         description
           "Timeout value for soft preemption to revert
           to hard preemption";
       }
     }

     grouping global-soft-preemption {
       description
         "Top level group for RSVP-TE soft-preemption";
       container global-soft-preemption {
         presence "Enables soft preemption on a node.";
         description
           "Top level container for RSVP-TE soft-preemption";
         uses global-soft-preemption_config;
       }
     }
     /*** End of RSVP-TE generic global properties. ***/

     /**
      * RSVP-TE interface generic groupings.
      */

     grouping rsvp-te-interface-attributes {
       description
         "Top level grouping for RSVP-TE interface properties.";
       container rsvp-te-interface-attributes {
         description
           "Top level container for RSVP-TE interface
           properties";
         container state {
           config false;
           description
             "State information associated with RSVP-TE
             bandwidth";
         }
       }
     }
     /*** End of RSVP-TE generic groupings ***/

     /* RSVP-TE global properties */
     augment "/rt:routing/rt:control-plane-protocols/"
     + "rt:control-plane-protocol/rsvp:rsvp/rsvp:globals" {
       description
         "RSVP-TE augmentation to RSVP globals";
         uses global-soft-preemption;
     }

     /* Linkage to the base RSVP all links */
     augment "/rt:routing/rt:control-plane-protocols/"
     + "rt:control-plane-protocol/rsvp:rsvp/rsvp:interfaces" {
       description
         "RSVP-TE generic data augmentation pertaining to interfaces";
       uses rsvp-te-interface-attributes;
     }

     /* Linkage to per RSVP interface */
     augment "/rt:routing/rt:control-plane-protocols/"
       + "rt:control-plane-protocol/rsvp:rsvp/rsvp:interfaces/" +
       "rsvp:interface" {
       description
         "RSVP-TE generic data augmentation pertaining to specific
          interface";
       uses rsvp-te-interface-attributes;
     }

     /* add augmentation for sessions and neighbors */
     augment "/rt:routing/rt:control-plane-protocols/"
     + "rt:control-plane-protocol/rsvp:rsvp/rsvp:globals/"
     + "rsvp:sessions/rsvp:session/rsvp:state/rsvp:psbs/rsvp:psb" {
       description
         "RSVP-TE generic data augmentation pertaining to session";
       /* To be added */
       leaf tspec-average-rate {
         type rt-types:bandwidth-ieee-float32;
         units "Bytes per second";
         description "Tspec Token Bucket Average Rate";
         reference "RFC2210: RSVP with INTSERV";
       }
       leaf tspec-size {
         type rt-types:bandwidth-ieee-float32;
         units "Bytes per second";
         description "Tspec Token Bucket Burst Rate";
         reference "RFC2210";
       }
       leaf tspec-peak-rate {
         type rt-types:bandwidth-ieee-float32;
         units "Bytes per second";
         description "Tspec Token Bucket Peak Data Rate";
         reference "RFC2210";
       }
       leaf min-policed-unit {
         type uint32;
         description "Tspec Minimum Policed Unit";
         reference "RFC2210";
       }
       leaf max-packet-size {
         type uint32;
         description "Tspec Maximum Packet Size";
         reference "RFC2210";
       }
     }
     augment "/rt:routing/rt:control-plane-protocols/"
     + "rt:control-plane-protocol/rsvp:rsvp/rsvp:globals/"
     + "rsvp:sessions/rsvp:session/rsvp:state/rsvp:rsbs/rsvp:rsb" {
       description
         "RSVP-TE generic data augmentation pertaining to session";
       leaf fspec-average-rate {
         type rt-types:bandwidth-ieee-float32;
         units "Bytes per second";
         description "Fspec Token Bucket Average Rate";
         reference "RFC2210";
       }
       leaf fspec-size {
         type rt-types:bandwidth-ieee-float32;
         units "Bytes per second";
         description "Fspec Token Bucket Burst Rate";
         reference "RFC2210";
       }
       leaf fspec-peak-rate {
         type rt-types:bandwidth-ieee-float32;
         units "Bytes per second";
         description "Fspec Token Bucket Peak Data Rate";
         reference "RFC2210";
       }
       leaf min-policed-unit {
         type uint32;
         description "Fspec Minimum Policed Unit";
         reference "RFC2210";
       }
       leaf max-packet-size {
         type uint32;
         description "Fspec Maximum Packet Size";
         reference "RFC2210";
       }
     }

     augment "/rt:routing/rt:control-plane-protocols/"
     + "rt:control-plane-protocol/rsvp:rsvp/rsvp:neighbors" {
       description
         "RSVP-TE generic data augmentation pertaining to neighbors";
       /* To be added */
     }

     /**
      * RSVP-TE generic augmentations of generic TE model.
      */

     /* TE tunnel augmentation */
     augment "/te:te/te:tunnels/te:tunnel" {
       when "/te:te/te:tunnels/te:tunnel" +
         "/te:p2p-primary-paths/te:p2p-primary-path" +
         "/te:path-setup-protocol = 'te-types:path-setup-rsvp'" {
         description
         "When the path signaling protocol is RSVP-TE ";
       }
       description
         "RSVP-TE generic data augmentation pertaining to TE tunnels";
       uses lsp-properties_config;
       uses tunnel-properties_config;
     }

     augment "/te:te/te:tunnels/te:tunnel/te:state" {
       when "/te:te/te:tunnels/te:tunnel" +
         "/te:p2p-primary-paths/te:p2p-primary-path" +
         "/te:path-setup-protocol = 'te-types:path-setup-rsvp'" {
         description
         "When the path signaling protocol is RSVP-TE ";
       }
       description
         "RSVP-TE generic data augmentation pertaining to TE tunnels";
       uses lsp-properties_config;
       uses tunnel-properties_config;
     }

     /* TE LSP augmentation */
     grouping rsvp-te-lsp-properties {
       description "RSVP-TE LSP properties grouping";
       }
       leaf associated-rsvp-session min-policed-unit {
         type leafref {
           path "/rt:routing/rt:control-plane-protocols/"
              + "rt:control-plane-protocol/rsvp:rsvp/rsvp:globals/"
              + "rsvp:sessions/rsvp:session/rsvp:local-index";
         } uint32;
         description
           "If the signalling protocol specified for this path is
           RSVP-TE, this "Fspec Minimum Policed Unit";
         reference "RFC2210";
       }
       leaf provides a max-packet-size {
         type uint32;
         description "Fspec Maximum Packet Size";
         reference to the associated
           session within the RSVP-TE protocol sessions list, such
           that details of the signaling can be retrieved."; "RFC2210";
       }

       uses lsp-properties_config;
       uses lsp-explicit-route-information_state;
       uses lsp-record-route-information_state;
     }

     augment "/te:te/te:lsps-state/te:lsp" {
       when "/te:te/te:lsps-state/te:lsp" "/rt:routing/rt:control-plane-protocols/"
     +
         "/te:path-setup-protocol = 'te-types:path-setup-rsvp'" "rt:control-plane-protocol/rsvp:rsvp/rsvp:neighbors" {
       description
         "When the signaling protocol is RSVP-TE ";
       }
       description
         "RSVP-TE generic data augmentation pertaining to specific TE
          LSP";
       uses rsvp-te-lsp-properties; neighbors";
       /* To be added */
     }

     augment "/te:te/te:tunnels/te:tunnel/te:p2p-primary-paths" +
             "/te:p2p-primary-path/te:state/te:lsps/te:lsp" {
       when "/te:te/te:tunnels/te:tunnel/te:p2p-primary-paths" +
             "/te:p2p-primary-path/te:state/te:lsps/te:lsp" +
             "/te:path-setup-protocol = 'te-types:path-setup-rsvp'" {
           description
           "When the signaling protocol is

     /**
      * RSVP-TE ";
       }
       description
         "RSVP-TE generic data augmentation pertaining to specific augmentations of generic TE
          LSP";
       uses rsvp-te-lsp-properties;
     } model.
      */

     /* TE tunnel augmentation */
     augment "/te:te/te:tunnels/te:tunnel/te:p2p-secondary-paths" +
       "/te:p2p-secondary-path/te:state/te:lsps/te:lsp" "/te:te/te:tunnels/te:tunnel" {
       when "/te:te/te:tunnels/te:tunnel/te:p2p-primary-paths" "/te:te/te:tunnels/te:tunnel" +
             "/te:p2p-primary-path/te:state/te:lsps/te:lsp"
         "/te:p2p-primary-paths/te:p2p-primary-path" +
         "/te:path-setup-protocol = 'te-types:path-setup-rsvp'" {
         description
         "When the path signaling protocol is RSVP-TE ";
       }
       description
         "RSVP-TE generic data augmentation pertaining to specific TE
          LSP"; tunnels";
       uses rsvp-te-lsp-properties; lsp-properties_config;
       uses tunnel-properties_config;
     }

     /* TE interface augmentation */

     augment "/te:te/te-dev:interfaces/te-dev:interface" "/te:te/te:tunnels/te:tunnel/te:state" {
       description
         "RSVP-TE generic data augmentation pertaining to specific TE
          interface";
     }
   }
   <CODE ENDS>

                   Figure 3: RSVP TE generic YANG module

2.3.  RSVP-TE MPLS Model

   The MPLS RSVP-TE YANG module augments the RSVP-TE generic module with
   parameters to configure and manage signaling of MPLS RSVP-TE LSPs.
   RSVP-TE YANG modules for other dataplane technologies (e.g.  OTN or
   WDM) are outside the scope of this document and are defined in other
   documents.

2.3.1.  Tree Diagram

   The following are possible types of configuration and state data
   nodes in this module:

   o  those augmenting or extending
       when "/te:te/te:tunnels/te:tunnel" +
         "/te:p2p-primary-paths/te:p2p-primary-path" +
         "/te:path-setup-protocol = 'te-types:path-setup-rsvp'" {
         description
         "When the generic path signaling protocol is RSVP-TE module

   o  those augmenting or extending the TE module

   o  those that are specific ";
       }
       description
         "RSVP-TE generic data augmentation pertaining to TE tunnels";
       uses lsp-properties_config;
       uses tunnel-properties_config;
     }

     /* TE LSP augmentation */
     grouping rsvp-te-lsp-properties {
       description "RSVP-TE LSP properties grouping";
       leaf associated-rsvp-session {
         type leafref {
           path "/rt:routing/rt:control-plane-protocols/"
              + "rt:control-plane-protocol/rsvp:rsvp/rsvp:globals/"
              + "rsvp:sessions/rsvp:session/rsvp:local-index";
         }
         description
           "If the RSVP-TE MPLS module

   Below signalling protocol specified for this path is
           RSVP-TE, this leaf provides a YANG tree representation for data items defined in reference to the associated
           session within the RSVP-TE MPLS module:

   module: ietf-rsvp-te-mpls
     augment /rt:routing/rt:control-plane-protocols/
     rt:control-plane-protocol/rsvp:rsvp:
       +--rw fast-reroute-local-revertive
          +--rw rsvp-frr-local-revert-delay?   uint32
     augment /rt:routing/rt:control-plane-protocols/
     rt:control-plane-protocol/rsvp:rsvp/rsvp:interfaces:
     augment /rt:routing/rt:control-plane-protocols/
     rt:control-plane-protocol/rsvp:rsvp/rsvp:interfaces/rsvp:interface:
     augment /rt:routing/rt:control-plane-protocols/
     rt:control-plane-protocol/rsvp:rsvp/rsvp:globals/
     rsvp:sessions/rsvp:session/rsvp:state:
     augment /rt:routing/rt:control-plane-protocols/
     rt:control-plane-protocol/rsvp:rsvp/rsvp:neighbors:
     augment /te:te/te:tunnels/te:tunnel:
       +--rw local-protection-desired?       empty
       +--rw bandwidth-protection-desired?   empty
       +--rw node-protection-desired?        empty
       +--rw non-php-desired?                empty
       +--rw entropy-label-cap?              empty
       +--rw oam-mep-entities-desired?       empty
       +--rw oam-mip-entities-desired?       empty
     augment /te:te/te:lsps-state/te:lsp:
       +--ro state
       |  +--ro local-protection-desired?       empty
       |  +--ro bandwidth-protection-desired?   empty
       |  +--ro node-protection-desired?        empty
       |  +--ro non-php-desired?                empty
       |  +--ro entropy-label-cap?              empty
       |  +--ro oam-mep-entities-desired?       empty
       |  +--ro oam-mip-entities-desired?       empty
       +--ro backup-info
          +--ro state
             +--ro backup-tunnel-name?         string
             +--ro backup-frr-on?              uint8
             +--ro backup-protected-lsp-num?   uint32
     augment /te:te/te:tunnels/te:tunnel/te:p2p-primary-paths/
     te:p2p-primary-path/te:state/te:lsps/te:lsp:
       +--ro state
       |  +--ro local-protection-desired?       empty
       |  +--ro bandwidth-protection-desired?   empty
       |  +--ro node-protection-desired?        empty
       |  +--ro non-php-desired?                empty
       |  +--ro entropy-label-cap?              empty
       |  +--ro oam-mep-entities-desired?       empty
       |  +--ro oam-mip-entities-desired?       empty
       +--ro backup-info
          +--ro state
             +--ro backup-tunnel-name?         string
             +--ro backup-frr-on?              uint8
             +--ro backup-protected-lsp-num?   uint32 protocol sessions list, such
           that details of the signaling can be retrieved.";
       }

       uses lsp-properties_config;
       uses lsp-explicit-route-information_state;
       uses lsp-record-route-information_state;
     }

     augment /te:te/te:tunnels/te:tunnel/te:p2p-secondary-paths/
     te:p2p-secondary-path/te:state/te:lsps/te:lsp:
       +--ro state
       |  +--ro local-protection-desired?       empty
       |  +--ro bandwidth-protection-desired?   empty
       |  +--ro node-protection-desired?        empty
       |  +--ro non-php-desired?                empty
       |  +--ro entropy-label-cap?              empty
       |  +--ro oam-mep-entities-desired?       empty
       |  +--ro oam-mip-entities-desired?       empty
       +--ro backup-info
          +--ro state
             +--ro backup-tunnel-name?         string
             +--ro backup-frr-on?              uint8
             +--ro backup-protected-lsp-num?   uint32 "/te:te/te:lsps-state/te:lsp" {
       when "/te:te/te:lsps-state/te:lsp" +
         "/te:path-setup-protocol = 'te-types:path-setup-rsvp'" {
         description
         "When the signaling protocol is RSVP-TE ";
       }
       description
         "RSVP-TE generic data augmentation pertaining to specific TE
          LSP";
       uses rsvp-te-lsp-properties;
     }

     augment /te:te/te-dev:interfaces/te-dev:interface:
       +--rw bandwidth-mpls-reservable
          +--rw (bandwidth-value)?
          |  +--:(absolute)
          |  |  +--rw absolute-value?   uint32
          |  +--:(percentage)
          |     +--rw percent-value?    uint32
          +--rw (bc-model-type)?
             +--:(bc-model-rdm)
             |  +--rw bc-model-rdm
             |     +--rw bandwidth-mpls-constraints
             |        +--rw maximum-reservable?   uint32
             |        +--rw bc-value*             uint32
             +--:(bc-model-mam)
             |  +--rw bc-model-mam
             |     +--rw bandwidth-mpls-constraints
             |        +--rw maximum-reservable?   uint32
             |        +--rw bc-value*             uint32
             +--:(bc-model-mar)
                +--rw bc-model-mar
                   +--rw bandwidth-mpls-constraints
                      +--rw maximum-reservable?   uint32
                      +--rw bc-value*             uint32 "/te:te/te:tunnels/te:tunnel/te:p2p-primary-paths" +
             "/te:p2p-primary-path/te:state/te:lsps/te:lsp" {
       when "/te:te/te:tunnels/te:tunnel/te:p2p-primary-paths" +
             "/te:p2p-primary-path/te:state/te:lsps/te:lsp" +
             "/te:path-setup-protocol = 'te-types:path-setup-rsvp'" {
           description
           "When the signaling protocol is RSVP-TE ";
       }
       description
         "RSVP-TE generic data augmentation pertaining to specific TE
          LSP";
       uses rsvp-te-lsp-properties;
     }

     augment /te:te/te-dev:interfaces/te-dev:interface:
       +--rw rsvp-te-frr-backups
          +--rw (type)?
             +--:(static-tunnel)
             |  +--rw static-backups
             |     +--rw static-backup* [backup-tunnel-name]
             |        +--rw backup-tunnel-name ->
             /te:te/tunnels/tunnel/name
             +--:(auto-tunnel)
                +--rw auto-tunnel-backups
                   +--rw auto-backup-protection?         identityref
                   +--rw auto-backup-path-computation?   identityref "/te:te/te:tunnels/te:tunnel/te:p2p-secondary-paths" +
       "/te:p2p-secondary-path/te:state/te:lsps/te:lsp" {
       when "/te:te/te:tunnels/te:tunnel/te:p2p-primary-paths" +
             "/te:p2p-primary-path/te:state/te:lsps/te:lsp" +
             "/te:path-setup-protocol = 'te-types:path-setup-rsvp'" {
           description
           "When the signaling protocol is RSVP-TE ";
       }
       description
         "RSVP-TE generic data augmentation pertaining to specific TE
          LSP";
       uses rsvp-te-lsp-properties;
     }

     /* TE interface augmentation */
     augment "/te:te/te-dev:interfaces/te-dev:interface" {
       description
         "RSVP-TE generic data augmentation pertaining to specific TE
          interface";
     }
   }
   <CODE ENDS>

                   Figure 4: RSVP TE generic YANG module

2.3.2.  RSVP-TE MPLS Tree diagram

2.3.2. YANG Module

   <CODE BEGINS> file "ietf-rsvp-te-mpls@2018-02-19.yang" "ietf-rsvp-te-mpls@2018-10-20.yang"
   module ietf-rsvp-te-mpls {
     yang-version 1.1;
     namespace "urn:ietf:params:xml:ns:yang:ietf-rsvp-te-mpls";

     prefix "rsvp-te-mpls";

     import ietf-rsvp {
       prefix "rsvp";
       reference "draft-ietf-teas-yang-rsvp: A YANG Data Model for
                  Resource Reservation Protocol (RSVP)";
     }

     import ietf-routing {
       prefix "rt";
       reference "RFC8349: A YANG Data Model for Routing Management";
     }

     import ietf-te-mpls-types {
       prefix "te-mpls-types";
       reference "draft-ietf-teas-yang-te-types: A YANG Data Model for
                  Common Traffic Engineering Types";
     }

     import ietf-te-types {
       prefix "te-types";
       reference "draft-ietf-teas-yang-te-types: A YANG Data Model for
                  Common Traffic Engineering Types";
     }

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

     import ietf-te-device {
       prefix "te-dev";
       reference "draft-ietf-teas-yang-te: A YANG Data Model for Traffic
                  Engineering Tunnels and Interfaces";
     }

     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>

        WG Chair: Lou Berger
                  <mailto:lberger@labn.net>

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

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

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

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

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

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

        Editor:   Xia Chen
                  <mailto:jescia.chenxia@huawei.com>

        Editor:   Raqib Jones
                  <mailto:raqib@Brocade.com>

        Editor:   Bin Wen
                  <mailto:Bin_Wen@cable.comcast.com>";

     description
       "Latest update to MPLS RSVP-TE YANG data model.";

     revision "2018-02-19" "2018-10-20" {
       description "Update to MPLS RSVP-TE YANG initial revision.";
       reference "RFC3209, RFC6511, RFC6790, RFC7260, RFC4859, RFC4090";
     }

     /* RSVP-TE MPLS LSPs groupings */
     grouping lsp-attributes-flags-mpls_config {
       description
         "Configuration parameters relating to RSVP-TE MPLS LSP
         attribute flags";
       leaf non-php-desired {
         type empty;
         description
           "Non-PHP is desired";
         reference "RFC6511";
       }
       leaf entropy-label-cap {
         type empty;
         description "Entropy label capability";
         reference "RFC6790";
       }
       leaf oam-mep-entities-desired {
         type empty;
         description "OAM MEP entities desired";
         reference "RFC7260";
       }
       leaf oam-mip-entities-desired {
         type empty;
         description "OAM MIP entities desired";
         reference "RFC7260";
       }
     }

     grouping lsp-session-attributes-obj-flags-mpls_config {
       description
         "Configuration parameters relating to RSVP-TE MPLS LSP
          session attribute flags";
       reference
         "RFC4859: Registry for RSVP-TE Session Flags";
       leaf local-protection-desired {
         type empty;
         description "Fastreroute local protection is desired.";
         reference
           "RFC4859: Registry for RSVP-TE Session Flags";
       }
       leaf bandwidth-protection-desired {
         type empty;
         description
           "Request FRR bandwidth protection on LSRs if
           present.";
         reference "RFC4090";
       }
       leaf node-protection-desired {
         type empty;
         description
           "Request FRR node protection on LSRs if
           present.";
         reference "RFC4090";
       }
     }

     grouping tunnel-properties-mpls_config {
       description
         "Top level grouping for LSP properties.";

       uses lsp-session-attributes-obj-flags-mpls_config;
       uses lsp-attributes-flags-mpls_config;
     }

     grouping lsp-properties-mpls {
       description
         "Top level grouping for LSP properties.";
       container state {
         config false;
         description
           "Configuration applied parameters and state";
         uses lsp-session-attributes-obj-flags-mpls_config;
         uses lsp-attributes-flags-mpls_config;
       }
     }
     /* End of RSVP-TE MPLS LSPs groupings */

     /* MPLS RSVP-TE interface groupings */
     grouping rsvp-te-interface_state {
       description
         "The RSVP-TE interface state grouping";
       leaf over-subscribed-bandwidth {
         type uint32;
         description
           "The amount of over-subscribed bandwidth on
           the interface";
       }
     }

     grouping rsvp-te-interface-softpreemption_state {
       description
         "The RSVP-TE interface preeemptions state grouping";
       container interface-softpreemption-state {
         description
           "The RSVP-TE interface preeemptions state grouping";
         leaf soft-preempted-bandwidth {
           type uint32;
           description
             "The amount of soft-preempted bandwidth on
             this interface";
         }
         list lsps {
           key
             "source destination tunnel-id lsp-id "+
             "extended-tunnel-id";
           description
             "List of LSPs that are soft-preempted";
           leaf source {
             type leafref {
               path "/te:te/te:lsps-state/te:lsp/"+
                    "te:source";
             }
             description
               "Tunnel sender address extracted from
               SENDER_TEMPLATE  object";
             reference "RFC3209";
           }
           leaf destination {
             type leafref {
               path "/te:te/te:lsps-state/te:lsp/"+
                    "te:destination";
             }
             description
               "Tunnel endpoint address extracted from
               SESSION object";
             reference "RFC3209";
           }
           leaf tunnel-id {
             type leafref {
               path "/te:te/te:lsps-state/te:lsp/"+
                 "te:tunnel-id";
             }
             description
               "Tunnel identifier used in the SESSION
               that remains constant over the life
               of the tunnel.";
             reference "RFC3209";
           }
           leaf lsp-id {
             type leafref {
               path "/te:te/te:lsps-state/te:lsp/"+
                    "te:lsp-id";
             }
             description
               "Identifier used in the SENDER_TEMPLATE
               and the FILTER_SPEC that can be changed
               to allow a sender to share resources with
               itself.";
             reference "RFC3209";
           }
           leaf extended-tunnel-id {
             type leafref {
               path "/te:te/te:lsps-state/te:lsp/"+
                 "te:extended-tunnel-id";
             }
             description
               "Extended Tunnel ID of the LSP.";
             reference "RFC3209";
           }
           leaf type {
             type leafref {
               path "/te:te/te:lsps-state/te:lsp/"+
                 "te:type";
             }
             description "LSP type P2P or P2MP";
           }
         }
       }
     }

     grouping bandwidth-mpls-constraints {
       description "Bandwidth constraints.";
       container bandwidth-mpls-constraints {
         description
           "Holds the bandwidth constraints properties";
         leaf maximum-reservable {
           type uint32 {
             range "0..4294967295";
           }
           description
             "The maximum reservable bandwidth on the
             interface";
         }
         leaf-list bc-value {
           type uint32 {
             range "0..4294967295";
           }
           max-elements 8;
           description
             "The bandwidth constraint type";
         }
       }
     }

     grouping bandwidth-constraint-values {
       description
         "Packet bandwidth contraints values";
       choice value-type {
         description
           "Value representation";
         case percentages {
           container perc-values {
             uses bandwidth-mpls-constraints;
             description
               "Percentage values";
           }
         }
         case absolutes {
           container abs-values {
             uses bandwidth-mpls-constraints;
             description
               "Absolute values";
           }
         }
       }
     }

     grouping bandwidth-mpls-reservable_config {
       description
         "Interface bandwidth reservable configuration grouping";
       choice bandwidth-value {
         description "Reservable bandwidth configuration choice";
         case absolute {
           leaf absolute-value {
             type uint32;
             description "Absolute value of the bandwidth";
           }
         }
         case percentage {
           leaf percent-value {
             type uint32 {
               range "0..4294967295";
             }
             description "Percentage reservable bandwidth";
           }
           description
             "The maximum reservable bandwidth on the
             interface";
         }
       }
       choice bc-model-type {
         description
           "Reservable bandwidth percentage capacity
           values.";
         case bc-model-rdm {
           container bc-model-rdm {
             description
               "Russian Doll Model Bandwidth Constraints.";
             uses bandwidth-mpls-constraints;
           }
         }
         case bc-model-mam {
           container bc-model-mam {
             uses bandwidth-mpls-constraints;
             description
               "Maximum Allocation Model Bandwidth
               Constraints.";
           }
         }
         case bc-model-mar {
           container bc-model-mar {
             uses bandwidth-mpls-constraints;
             description
               "Maximum Allocation with Reservation Model
               Bandwidth Constraints.";
           }
         }
       }
     }

     grouping bandwidth-mpls-reservable {
       description
         "Packet reservable bandwidth";
       container bandwidth-mpls-reservable {
         description
           "Interface bandwidth reservable container";
         uses bandwidth-mpls-reservable_config;
       }
     }
     /* End of RSVP-TE interface groupings */

     /* RSVP-TE FRR groupings */
     grouping rsvp-te-frr-auto-tunnel-backup_config {
       description
         "Auto-tunnel backup configuration grouping";
       leaf auto-backup-protection {
         type identityref {
           base te-mpls-types:backup-protection-type;
         }
         default
           te-mpls-types:backup-protection-node-link;
         description
           "Describes whether the backup should offer
           protection against link, node, or either";
       }
       leaf auto-backup-path-computation {
         type identityref {
           base
             te-types:path-computation-srlg-type;
         }
         description
           "FRR backup computation type";
       }
     }

     grouping rsvp-te-frr-backups_config {
       description
         "Top level container for RSVP-TE FRR backup parameters";
       choice type {
         description
           "FRR backup tunnel type";
         case static-tunnel {
           container static-backups {
             description "List of static backups";
             list static-backup {
               key "backup-tunnel-name";
               description
                 "List of static backup tunnels that
                 protect the RSVP-TE interface.";
               leaf backup-tunnel-name {
                 type leafref {
                   path "/te:te/te:tunnels/te:tunnel/te:name";
                 }
                 description "FRR Backup tunnel name";
               }
             }
           }
         }
         case auto-tunnel {
           container auto-tunnel-backups {
             description "Auto-tunnel choice";
             uses rsvp-te-frr-auto-tunnel-backup_config;
           }
         }
       }
     }

     grouping rsvp-te-frr-backups {
         description
           "RSVP-TE facility backup grouping";
       container rsvp-te-frr-backups {
         description
           "RSVP-TE facility backup properties";
         uses rsvp-te-frr-backups_config;
       }
     }

     grouping lsp-backup-info_state {
       description "LSP backup information grouping";
       leaf backup-tunnel-name {
         type string;
         description
           "If an LSP has an FRR backup LSP that can protect it,
           this field identifies the tunnel name of the backup LSP.
           Otherwise, this field is empty.";
       }
       leaf backup-frr-on {
         type uint8;
         description
           "Whether currently this backup is carrying traffic";
       }
       leaf backup-protected-lsp-num {
         type uint32;
         description
           "Number of LSPs protected by this backup";
       }
     }

     grouping lsp-backup-info {
       description "Backup/bypass LSP related information";
       container backup-info {
         description
           "backup information";
         container state {
           config false;
           description
             "Configuration applied parameters and state";
           uses lsp-backup-info_state;
         }
       }
     }

     grouping fast-reroute-local-revertive_config {
       description "RSVP-TE FRR local revertive grouping";
       leaf rsvp-frr-local-revert-delay {
         type uint32;
         description
           "Time to wait after primary link is restored
           before node attempts local revertive
           procedures.";
       }
     }

     /*** End of RSVP-TE FRR backup information ***/

     grouping fast-reroute-local-revertive {
       description
         "Top level grouping for globals properties";
       container fast-reroute-local-revertive {
         description "RSVP-TE FRR local revertive container";
         uses fast-reroute-local-revertive_config;
       }
     }

     /* RSVP-TE global properties */
     augment "/rt:routing/rt:control-plane-protocols/"
     + "rt:control-plane-protocol/rsvp:rsvp" {
       description
         "RSVP-TE augmentation to RSVP globals";
       uses fast-reroute-local-revertive;
     }

     /* Linkage to the base RSVP all interfaces */
     augment "/rt:routing/rt:control-plane-protocols/"
     + "rt:control-plane-protocol/rsvp:rsvp/rsvp:interfaces" {
       description
         "Augmentations for RSVP-TE MPLS all interfaces properties";
       /* To be added */
     }

     /* Linkage to per RSVP interface */
     augment "/rt:routing/rt:control-plane-protocols/"
     + "rt:control-plane-protocol/rsvp:rsvp/rsvp:interfaces/" +
     "rsvp:interface" {
       description
         "Augmentations for RSVP-TE MPLS per interface properties";
       /* To be added */
     }

     /* add augmentation for sessions neighbors */
     augment "/rt:routing/rt:control-plane-protocols/"
     + "rt:control-plane-protocol/rsvp:rsvp/rsvp:globals/"
     + "rsvp:sessions/rsvp:session/rsvp:state" {
       description
         "Augmentations for RSVP-TE MPLS sessions";
       /* To be added */
     }

     augment "/rt:routing/rt:control-plane-protocols/"
     + "rt:control-plane-protocol/rsvp:rsvp/rsvp:neighbors" {
       description
         "Augmentations for RSVP-TE MPLS neighbors properties";
       /* To be added */
     }
     /**
      * Augmentation to TE generic module
      */
     augment "/te:te/te:tunnels/te:tunnel" {
       description
         "Augmentations for RSVP-TE MPLS TE tunnel properties";
       uses tunnel-properties-mpls_config;
     }

     augment "/te:te/te:lsps-state/te:lsp" {
       when "/te:te/te:lsps-state/te:lsp" +
       "/te:path-setup-protocol = 'te-types:path-setup-rsvp'" {
         description
         "When the signaling protocol is RSVP-TE ";
       }
       description
         "RSVP-TE MPLS LSP state properties";
       uses lsp-properties-mpls;
       uses lsp-backup-info;
     }

     augment "/te:te/te:tunnels/te:tunnel/te:p2p-primary-paths" +
       "/te:p2p-primary-path/te:state/te:lsps/te:lsp" {
       when "/te:te/te:tunnels/te:tunnel" +
         "/te:p2p-secondary-paths/te:p2p-secondary-path/" +
         "te:path-setup-protocol = 'te-types:path-setup-rsvp'" {
         description
         "When the signaling protocol is RSVP-TE ";
       }
       description
         "RSVP-TE MPLS LSP state properties";
       uses lsp-properties-mpls;
       uses lsp-backup-info;
     }

     augment "/te:te/te:tunnels/te:tunnel/te:p2p-secondary-paths" +
       "/te:p2p-secondary-path/te:state/te:lsps/te:lsp" {
       when "/te:te/te:tunnels/te:tunnel" +
         "/te:p2p-secondary-paths/te:p2p-secondary-path/" +
         "te:path-setup-protocol = 'te-types:path-setup-rsvp'" {
         description
         "When the signaling protocol is RSVP-TE ";
       }
       description
         "RSVP-TE MPLS LSP state properties";
       uses lsp-properties-mpls;
       uses lsp-backup-info;
     }
     augment "/te:te/te-dev:interfaces/te-dev:interface" {
       description
         "RSVP reservable bandwidth configuration properties";
       uses bandwidth-mpls-reservable;
     }

     augment "/te:te/te-dev:interfaces/te-dev:interface" {
       description
         "RSVP reservable bandwidth configuration properties";
       uses rsvp-te-frr-backups;
     }
   }
   <CODE ENDS>

                    Figure 5: RSVP TE MPLS YANG module

   Figure 5 shows the YANG tree representation of the RSVP TE MPLS
   module that augments RSVP-TE module as well as RSVP and TE YANG
   modules.

3.  IANA Considerations

   This document registers the following URIs in the IETF XML registry
   [RFC3688].  Following the format in [RFC3688], the following
   registration is requested to be made.

   URI: urn:ietf:params:xml:ns:yang:ietf-rsvp-te XML: N/A, the requested
   URI is an XML namespace.

   URI: urn:ietf:params:xml:ns:yang:ietf-rsvp-te-mpls XML: N/A, the
   requested URI is an XML namespace.

   This document registers a YANG module in the YANG Module Names
   registry [RFC6020].

   name: ietf-rsvp namespace: urn:ietf:params:xml:ns:yang:ietf-rsvp-te
   prefix: ietf-rsvp reference: RFC3209

   name: ietf-rsvp-te namespace: urn:ietf:params:xml:ns:yang:ietf-rsvp-
   te-mpls prefix: ietf-rsvp-te reference: RFC3209

4.  Security Considerations

   The YANG module defined in this memo is designed to be accessed via
   the NETCONF protocol [RFC6241].  The lowest NETCONF layer is the
   secure transport layer and the mandatory-to-implement secure
   transport is SSH [RFC6242].  The NETCONF access control model
   [RFC6536]
   [RFC8341] provides means to restrict access for particular NETCONF
   users to a pre-configured subset of all available NETCONF protocol
   operations and content.

   There are a number of data nodes defined in the YANG module module(s)
   defined in this document which 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.

   /rt:routing/rt:control-plane-protocols/rt:control-plane-
   protocol/rsvp:rsvp/globals: The data nodes defined defined in this
   document and under this branch are applicable device-wide and can
   affect all RSVP established sessions.  Unauthorized access to this
   container can potentially cause disruptive event(s) on all
   established sessions.

   /rt:routing/rt:control-plane-protocols/rt:control-plane-protocol/
   rsvp:rsvp/rsvp:globals/rsvp:sessions: The data nodes defined in this
   document and under this branch are applicable to one or all RSVP-TE
   session(s).  Unauthorized access to this container can potentially
   affect the impacted RSVP session(s).

   /rt:routing/rt:control-plane-protocols/rt:control-plane-
   protocol/rsvp:rsvp/rsvp:interfaces: The data nodes defined defined in
   this document and under this branch are applicable to one or all RSVP
   interfaces.  Unauthorized access to this container can potentially
   affect established session(s) over impacted interface(s).

5.  Acknowledgement

   The authors would like to thank Lou Berger for reviewing and
   providing valuable feedback on this document.

6.  Contributors
      Xia Chen
      Huawei Technologies

      Email: jescia.chenxia@huawei.com

      Raqib Jones
      Brocade

      Email: raqib@Brocade.com

      Bin Wen
      Comcast

      Email: Bin_Wen@cable.comcast.com

7.  Normative References

   [I-D.ietf-teas-yang-rsvp]
              Beeram, V., Saad, T., Gandhi, R., Liu, X., Bryskin, I.,
              and H. Shah, "A YANG Data Model for Resource Reservation
              Protocol (RSVP)", draft-ietf-teas-yang-rsvp-08 draft-ietf-teas-yang-rsvp-09 (work in
              progress), October 2017. May 2018.

   [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-11 draft-ietf-teas-yang-te-17 (work
              in progress), October 2018.

   [I-D.ietf-teas-yang-te-types]
              Saad, T., Gandhi, R., Liu, X., Beeram, V., and I. Bryskin,
              "Traffic Engineering Common YANG Types", draft-ietf-teas-
              yang-te-types-01 (work in progress), February October 2018.

   [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>.

   [RFC2205]  Braden, R., Ed., Zhang, L., Berson, S., Herzog, S., and S.
              Jamin, "Resource ReSerVation Protocol (RSVP) -- Version 1
              Functional Specification", RFC 2205, DOI 10.17487/RFC2205,
              September 1997, <https://www.rfc-editor.org/info/rfc2205>.

   [RFC3209]  Awduche, D., Berger, L., Gan, D., Li, T., Srinivasan, V.,
              and G. Swallow, "RSVP-TE: Extensions to RSVP for LSP
              Tunnels", RFC 3209, DOI 10.17487/RFC3209, December 2001,
              <https://www.rfc-editor.org/info/rfc3209>.

   [RFC3688]  Mealling, M., "The IETF XML Registry", BCP 81, RFC 3688,
              DOI 10.17487/RFC3688, January 2004,
              <https://www.rfc-editor.org/info/rfc3688>.

   [RFC6020]  Bjorklund, M., Ed., "YANG - A Data Modeling Language for
              the Network Configuration Protocol (NETCONF)", RFC 6020,
              DOI 10.17487/RFC6020, October 2010,
              <https://www.rfc-editor.org/info/rfc6020>.

   [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>.

   [RFC6991]  Schoenwaelder, J., Ed., "Common YANG Data Types",
              RFC 6991, DOI 10.17487/RFC6991, July 2013,
              <https://www.rfc-editor.org/info/rfc6991>.

   [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>.

   [RFC8174]  Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC
              2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174,
              May 2017, <https://www.rfc-editor.org/info/rfc8174>.

   [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>.

   [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>.

   [RFC8341]  Bierman, A. and M. Bjorklund, "Network Configuration
              Access Control Model", STD 91, RFC 8341,
              DOI 10.17487/RFC8341, March 2018,
              <https://www.rfc-editor.org/info/rfc8341>.

Authors' Addresses

   Vishnu Pavan Beeram
   Juniper Networks

   Email: vbeeram@juniper.net

   Tarek Saad (editor)
   Cisco Systems, Inc.

   Email: tsaad@cisco.com

   Rakesh Gandhi
   Cisco Systems, Inc.

   Email: rgandhi@cisco.com

   Xufeng Liu
   Jabil
   Volta Networks

   Email: Xufeng_Liu@jabil.com xufeng.liu.ietf@gmail.com

   Igor Bryskin
   Huawei Technologies

   Email: Igor.Bryskin@huawei.com

   Himanshu Shah
   Ciena

   Email: hshah@ciena.com