CCAMP Working Group I. Busi
Internet-Draft Huawei Technologies
Intended status: Standards Track A. Guo
Expires: 8 September 2022 Futurewei Technologies
S. Belotti
Nokia
7 March 2022
YANG Data Models for requesting Path Computation in Optical Networks
draft-gbb-ccamp-optical-path-computation-yang-01
Abstract
This document describes YANG data models for Remote Procedure Calls
(RPCs) to request Path Computation in Optical Networks (OTN, WSON and
Flexi-grid).
The YANG data models defined in this document conforms to the Network
Management Datastore Architecture (NMDA).
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 8 September 2022.
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Copyright (c) 2022 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
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license-info) in effect on the date of publication of this document.
Please review these documents carefully, as they describe your rights
and restrictions with respect to this document. Code Components
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extracted from this document must include Revised BSD License text as
described in Section 4.e of the Trust Legal Provisions and are
provided without warranty as described in the Revised BSD License.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1. Terminology and Notations . . . . . . . . . . . . . . . . 3
1.2. Tree Diagram . . . . . . . . . . . . . . . . . . . . . . 3
1.3. Prefix in Data Node Names . . . . . . . . . . . . . . . . 3
2. YANG Data Models for Optical Path Computation . . . . . . . . 4
2.1. YANG Models Overview . . . . . . . . . . . . . . . . . . 4
2.2. Attributes Augmentation . . . . . . . . . . . . . . . . . 5
2.3. Bandwidth Augmentation . . . . . . . . . . . . . . . . . 6
2.4. Label Augmentations . . . . . . . . . . . . . . . . . . . 6
3. Optical Path Computation Tree Diagrams . . . . . . . . . . . 6
3.1. WSON Path Computation Tree Diagrams . . . . . . . . . . . 6
3.2. Flexi-grid Path Computation Tree Diagrams . . . . . . . . 11
3.3. OTN Path Computation Tree Diagrams . . . . . . . . . . . 15
4. YANG Models for Optical Path Computation . . . . . . . . . . 19
4.1. YANG Model for WSON Path Computation . . . . . . . . . . 19
4.2. YANG Model for Flexi-grid Path Computation . . . . . . . 27
4.3. YANG Model for OTN Path Computation . . . . . . . . . . . 35
5. Manageability Considerations . . . . . . . . . . . . . . . . 41
6. Security Considerations . . . . . . . . . . . . . . . . . . . 42
7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 42
8. References . . . . . . . . . . . . . . . . . . . . . . . . . 42
8.1. Normative References . . . . . . . . . . . . . . . . . . 42
8.2. Informative References . . . . . . . . . . . . . . . . . 44
Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . . 45
Contributors . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 45
1. Introduction
[I-D.ietf-teas-yang-path-computation] describes key use cases, where
a client needs to request underlying SDN controllers for path
computation. In some of these use cases, the underlying SDN
controller can control a single-layer optical technologies, including
Optical Transport Network (OTN), Wavelength Switched Optical Networks
(WSON), Flexi-grid, and multi-layer Optical network.
This document defines YANG data models, which augment the generic
Path Computation RPC defined in
[I-D.ietf-teas-yang-path-computation], with technology-specific
augmentations required to request path computation to an underlying
Optical SDN controller. These models allow a client to delegate path
computation tasks to the underlying Optical SDN controller without
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having to obtain optical-layer information from the controller and
performing feasible path computation itself. This is especially
helpful in cases where computing optically-feasible paths require
knowledge of physical-layer states, such as optical impairments,
which are visible only to the Optical controller.
The YANG data model defined in this document conforms to the Network
Management Datastore Architecture [RFC8342].
1.1. Terminology and Notations
Refer to [RFC7446] and [RFC7581] for the key terms used in this
document. The following terms are defined in [RFC7950] and are not
redefined here:
* client
* server
* augment
* data model
* data node
The following terms are defined in [RFC6241] and are not redefined
here:
* configuration data
* state data
The terminology for describing YANG data models is found in
[RFC7950].
1.2. Tree Diagram
A simplified graphical representation of the data model is used in
Section 3 of this document. The meaning of the symbols in these
diagrams is defined in [RFC8340].
1.3. Prefix 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.
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+==============+==================================+===========+
| Prefix | YANG module | Reference |
+==============+==================================+===========+
| l0-types | ietf-layer0-types | [RFC9093] |
+--------------+----------------------------------+-----------+
| l0-types-ext | ietf-layer0-types-ext | [RFCYYYY] |
+--------------+----------------------------------+-----------+
| l0-types | ietf-layer0-types | [RFC8776] |
+--------------+----------------------------------+-----------+
| l1-types | ietf-layer1-types | [RFCZZZZ] |
+--------------+----------------------------------+-----------+
| te | ietf-te | [RFCKKKK] |
+--------------+----------------------------------+-----------+
| tep | ietf-te-path-computation | [RFCJJJJ] |
+--------------+----------------------------------+-----------+
| flexg-pc | ietf-flexi-grid-path-computation | RFCXXXX |
+--------------+----------------------------------+-----------+
| wson-pc | ietf-wson-path-computation | RFCXXXX |
+--------------+----------------------------------+-----------+
| otn-pc | ietf-otn-path-computation | RFCXXXX |
+--------------+----------------------------------+-----------+
Table 1: Prefixes and corresponding YANG modules
RFC Editor Note: Please replace XXXX with the RFC number assigned to
this document. Please replace YYYY with the RFC number assigned to
[I-D.ietf-ccamp-layer0-types-ext]. Please replace ZZZZ with the RFC
number assigned to [I-D.ietf-ccamp-layer1-types]. Please replace
KKKK with the RFC number assigned to [I-D.ietf-teas-yang-te]. Please
replace JJJJ with the RFC number assigned to
[I-D.ietf-teas-yang-path-computation]. Please remove this note.
2. YANG Data Models for Optical Path Computation
2.1. YANG Models Overview
The YANG data models for requesting WSON, Flexi-grid and OTN path
computation are defined as augmentations of the generic Path
Computation RPC defined in [I-D.ietf-teas-yang-path-computation], as
shown in Figure 1.
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+--------------------------+ o: augment
TE generic | ietf-te-path-computation |
+--------------------------+
o o o
| | |
| | |
+-----------+ | +-----------+
| | |
| | |
| | |
| +---------------------------+ |
| | ietf-otn-path-computation | |
| +---------------------------+ |
| OTN |
| |
| |
+----------------------------+ |
| ietf-wson-path-computation | |
+----------------------------+ |
WSON |
+----------------------------------+
| ietf-flexi-grid-path-computation |
+----------------------------------+
Flexi-grid
Figure 1: Relationship between WSON, Flexi-grid, OTN and TE path
computation models
The entities and Traffic Engineering (TE) attributes, such as
requested path and tunnel attributes, defined in
[I-D.ietf-teas-yang-path-computation], are still applicable when
requesting WSON, Flexi-grid and OTN path computation and the models
defined in this document only specifies the additional technology-
specific attributes/information, using the attributes defined in
[RFC9093], [I-D.ietf-ccamp-layer0-types-ext] and
[I-D.ietf-ccamp-layer1-types].
The YANG modules ietf-wson-path-computation, ietf-flexi-grid-path-
computation and ietf-otn-path-computation defined in this document
conforms to the Network Management Datastore Architecture (NMDA)
defined in [RFC8342].
2.2. Attributes Augmentation
The common characteristics for layer 0 (WSON and Flexi-grid) tunnels
are under definition in [I-D.ietf-ccamp-layer0-types-ext] and re-used
in the ietf-wson-path-computation and ietf-flexi-grid-path-
computation YANG models
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2.3. Bandwidth Augmentation
As described in Section 4.2 of [RFC7699], there is some overlap
between bandwidth and label in layer0.
The WSON and flexi-grid label resource information described in
Section 2.4, is sufficient to describe also the spectrum resources
within WSON and flexi-grid networks. Therefore, the model does not
define any augmentation for the te-bandwidth containers defined in
[I-D.ietf-teas-yang-path-computation].
The OTN path computation model augments all the occurrences of the
te-bandwidth container with the OTN technology-specific attributes
using the otn-link-bandwidth and otn-path-bandwidth groupings defined
in [I-D.ietf-ccamp-layer1-types].
2.4. Label Augmentations
The models augment all the occurrences of the label-restriction list
with WSON, Flexi-grid and OTN technology-specific attributes using
the l0-label-range-info and flexi-grid-label-range-info groupings
defined in [RFC9093] and the otn-label-range-info grouping defined in
[I-D.ietf-ccamp-layer1-types].
Moreover, the models augment all the occurrences of the te-label
container with the WSON, Flexi-grid and OTN technology-specific
attributes using the wson-label-start-end, wson-label-hop, wson-
label-step, flexi-grid-label-start-end, flexi-grid-label-hop and
flexi-grid-label-step defined in [RFC9093] and the otn-label-start-
end, otn-label-hop and otn-label-step groupings defined in
[I-D.ietf-ccamp-layer1-types].
3. Optical Path Computation Tree Diagrams
3.1. WSON Path Computation Tree Diagrams
Figure 2 below shows the tree diagram of the YANG data model defined
in module ietf-wson-path-computation.yang.
module: ietf-wson-path-computation
augment /te:tunnels-path-compute/te:input/te:path-compute-info
/tepc:path-request:
+-- fec-type? identityref
+-- termination-type? identityref
+-- bit-stuffing? boolean
+-- wavelength-assignment? identityref
+-- gsnr-margin? snr
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augment /te:tunnels-path-compute/te:output/te:path-compute-result
/tepc:response/tepc:computed-paths-properties
/tepc:computed-path-properties/tepc:path-properties:
+--ro estimated-gsnr? snr
augment /te:tunnels-path-compute/te:input/te:path-compute-info
/tepc:path-request/tepc:optimizations/tepc:algorithm
/tepc:metric/tepc:optimization-metric
/tepc:explicit-route-exclude-objects
/tepc:route-object-exclude-object/tepc:type:
+--:(oms-element)
+-- oms-element-uid? string
augment /te:tunnels-path-compute/te:input/te:path-compute-info
/tepc:path-request/tepc:optimizations/tepc:algorithm
/tepc:metric/tepc:optimization-metric
/tepc:explicit-route-include-objects
/tepc:route-object-include-object/tepc:type:
+--:(oms-element)
+-- oms-element-uid? string
augment /te:tunnels-path-compute/te:input/te:path-compute-info
/tepc:path-request/tepc:explicit-route-objects-always
/tepc:route-object-exclude-always/tepc:type:
+--:(oms-element)
+-- oms-element-uid? string
augment /te:tunnels-path-compute/te:input/te:path-compute-info
/tepc:path-request/tepc:explicit-route-objects-always
/tepc:route-object-include-exclude/tepc:type:
+--:(oms-element)
+-- oms-element-uid? string
augment /te:tunnels-path-compute/te:input/te:path-compute-info
/tepc:synchronization/tepc:exclude-objects/tepc:excludes
/tepc:type:
+--:(oms-element)
+-- oms-element-uid? string
augment /te:tunnels-path-compute/te:output/te:path-compute-result
/tepc:response/tepc:computed-paths-properties
/tepc:computed-path-properties/tepc:path-properties
/tepc:path-route-objects/tepc:path-route-object
/tepc:type:
+--:(oms-element)
+--ro oms-element-uid? string
augment /te:tunnels-path-compute/te:input/te:path-compute-info
/tepc:path-request/tepc:path-in-segment
/tepc:label-restrictions/tepc:label-restriction:
+-- grid-type? identityref
+-- priority? uint8
augment /te:tunnels-path-compute/te:input/te:path-compute-info
/tepc:path-request/tepc:path-out-segment
/tepc:label-restrictions/tepc:label-restriction:
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+-- grid-type? identityref
+-- priority? uint8
augment /te:tunnels-path-compute/te:input/te:path-compute-info
/tepc:path-request/tepc:optimizations/tepc:algorithm
/tepc:metric/tepc:optimization-metric
/tepc:explicit-route-exclude-objects
/tepc:route-object-exclude-object/tepc:type/tepc:label
/tepc:label-hop/tepc:te-label/tepc:technology:
+--:(wson)
+-- (grid-type)?
+--:(dwdm)
| +-- (single-or-super-channel)?
| +--:(single)
| | +-- dwdm-n? l0-types:dwdm-n
| +--:(super)
| +-- subcarrier-dwdm-n* l0-types:dwdm-n
+--:(cwdm)
+-- cwdm-n? l0-types:cwdm-n
augment /te:tunnels-path-compute/te:input/te:path-compute-info
/tepc:path-request/tepc:optimizations/tepc:algorithm
/tepc:metric/tepc:optimization-metric
/tepc:explicit-route-include-objects
/tepc:route-object-include-object/tepc:type/tepc:label
/tepc:label-hop/tepc:te-label/tepc:technology:
+--:(wson)
+-- (grid-type)?
+--:(dwdm)
| +-- (single-or-super-channel)?
| +--:(single)
| | +-- dwdm-n? l0-types:dwdm-n
| +--:(super)
| +-- subcarrier-dwdm-n* l0-types:dwdm-n
+--:(cwdm)
+-- cwdm-n? l0-types:cwdm-n
augment /te:tunnels-path-compute/te:input/te:path-compute-info
/tepc:path-request/tepc:explicit-route-objects-always
/tepc:route-object-exclude-always/tepc:type/tepc:label
/tepc:label-hop/tepc:te-label/tepc:technology:
+--:(wson)
+-- (grid-type)?
+--:(dwdm)
| +-- (single-or-super-channel)?
| +--:(single)
| | +-- dwdm-n? l0-types:dwdm-n
| +--:(super)
| +-- subcarrier-dwdm-n* l0-types:dwdm-n
+--:(cwdm)
+-- cwdm-n? l0-types:cwdm-n
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augment /te:tunnels-path-compute/te:input/te:path-compute-info
/tepc:path-request/tepc:explicit-route-objects-always
/tepc:route-object-include-exclude/tepc:type/tepc:label
/tepc:label-hop/tepc:te-label/tepc:technology:
+--:(wson)
+-- (grid-type)?
+--:(dwdm)
| +-- (single-or-super-channel)?
| +--:(single)
| | +-- dwdm-n? l0-types:dwdm-n
| +--:(super)
| +-- subcarrier-dwdm-n* l0-types:dwdm-n
+--:(cwdm)
+-- cwdm-n? l0-types:cwdm-n
augment /te:tunnels-path-compute/te:input/te:path-compute-info
/tepc:path-request/tepc:path-in-segment
/tepc:label-restrictions/tepc:label-restriction
/tepc:label-start/tepc:te-label/tepc:technology:
+--:(wson)
+-- (grid-type)?
+--:(dwdm)
| +-- dwdm-n? l0-types:dwdm-n
+--:(cwdm)
+-- cwdm-n? l0-types:cwdm-n
augment /te:tunnels-path-compute/te:input/te:path-compute-info
/tepc:path-request/tepc:path-in-segment
/tepc:label-restrictions/tepc:label-restriction
/tepc:label-end/tepc:te-label/tepc:technology:
+--:(wson)
+-- (grid-type)?
+--:(dwdm)
| +-- dwdm-n? l0-types:dwdm-n
+--:(cwdm)
+-- cwdm-n? l0-types:cwdm-n
augment /te:tunnels-path-compute/te:input/te:path-compute-info
/tepc:path-request/tepc:path-in-segment
/tepc:label-restrictions/tepc:label-restriction
/tepc:label-step/tepc:technology:
+--:(wson)
+-- (l0-grid-type)?
+--:(dwdm)
| +-- wson-dwdm-channel-spacing? identityref
+--:(cwdm)
+-- wson-cwdm-channel-spacing? identityref
augment /te:tunnels-path-compute/te:input/te:path-compute-info
/tepc:path-request/tepc:path-out-segment
/tepc:label-restrictions/tepc:label-restriction
/tepc:label-start/tepc:te-label/tepc:technology:
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+--:(wson)
+-- (grid-type)?
+--:(dwdm)
| +-- dwdm-n? l0-types:dwdm-n
+--:(cwdm)
+-- cwdm-n? l0-types:cwdm-n
augment /te:tunnels-path-compute/te:input/te:path-compute-info
/tepc:path-request/tepc:path-out-segment
/tepc:label-restrictions/tepc:label-restriction
/tepc:label-end/tepc:te-label/tepc:technology:
+--:(wson)
+-- (grid-type)?
+--:(dwdm)
| +-- dwdm-n? l0-types:dwdm-n
+--:(cwdm)
+-- cwdm-n? l0-types:cwdm-n
augment /te:tunnels-path-compute/te:input/te:path-compute-info
/tepc:path-request/tepc:path-out-segment
/tepc:label-restrictions/tepc:label-restriction
/tepc:label-step/tepc:technology:
+--:(wson)
+-- (l0-grid-type)?
+--:(dwdm)
| +-- wson-dwdm-channel-spacing? identityref
+--:(cwdm)
+-- wson-cwdm-channel-spacing? identityref
augment /te:tunnels-path-compute/te:input/te:path-compute-info
/tepc:synchronization/tepc:exclude-objects/tepc:excludes
/tepc:type/tepc:label/tepc:label-hop/tepc:te-label
/tepc:technology:
+--:(wson)
+-- (grid-type)?
+--:(dwdm)
| +-- (single-or-super-channel)?
| +--:(single)
| | +-- dwdm-n? l0-types:dwdm-n
| +--:(super)
| +-- subcarrier-dwdm-n* l0-types:dwdm-n
+--:(cwdm)
+-- cwdm-n? l0-types:cwdm-n
augment /te:tunnels-path-compute/te:output/te:path-compute-result
/tepc:response/tepc:computed-paths-properties
/tepc:computed-path-properties/tepc:path-properties
/tepc:path-route-objects/tepc:path-route-object/tepc:type
/tepc:label/tepc:label-hop/tepc:te-label/tepc:technology:
+--:(wson)
+--ro (grid-type)?
+--:(dwdm)
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| +--ro (single-or-super-channel)?
| +--:(single)
| | +--ro dwdm-n? l0-types:dwdm-n
| +--:(super)
| +--ro subcarrier-dwdm-n* l0-types:dwdm-n
+--:(cwdm)
+--ro cwdm-n? l0-types:cwdm-n
Figure 2: WSON path computation tree diagram
3.2. Flexi-grid Path Computation Tree Diagrams
Figure 3 below shows the tree diagram of the YANG data model defined
in module ietf-flexi-grid-path-computation.yang.
module: ietf-flexi-grid-path-computation
augment /te:tunnels-path-compute/te:input/te:path-compute-info
/tepc:path-request:
+-- fec-type? identityref
+-- termination-type? identityref
+-- bit-stuffing? boolean
+-- wavelength-assignment? identityref
+-- gsnr-margin? snr
augment /te:tunnels-path-compute/te:output/te:path-compute-result
/tepc:response/tepc:computed-paths-properties
/tepc:computed-path-properties/tepc:path-properties:
+--ro estimated-gsnr? snr
augment /te:tunnels-path-compute/te:input/te:path-compute-info
/tepc:path-request/tepc:optimizations/tepc:algorithm
/tepc:metric/tepc:optimization-metric
/tepc:explicit-route-exclude-objects
/tepc:route-object-exclude-object/tepc:type:
+--:(oms-element)
+-- oms-element-uid? string
augment /te:tunnels-path-compute/te:input/te:path-compute-info
/tepc:path-request/tepc:optimizations/tepc:algorithm
/tepc:metric/tepc:optimization-metric
/tepc:explicit-route-include-objects
/tepc:route-object-include-object/tepc:type:
+--:(oms-element)
+-- oms-element-uid? string
augment /te:tunnels-path-compute/te:input/te:path-compute-info
/tepc:path-request/tepc:explicit-route-objects-always
/tepc:route-object-exclude-always/tepc:type:
+--:(oms-element)
+-- oms-element-uid? string
augment /te:tunnels-path-compute/te:input/te:path-compute-info
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/tepc:path-request/tepc:explicit-route-objects-always
/tepc:route-object-include-exclude/tepc:type:
+--:(oms-element)
+-- oms-element-uid? string
augment /te:tunnels-path-compute/te:input/te:path-compute-info
/tepc:synchronization/tepc:exclude-objects/tepc:excludes
/tepc:type:
+--:(oms-element)
+-- oms-element-uid? string
augment /te:tunnels-path-compute/te:output/te:path-compute-result
/tepc:response/tepc:computed-paths-properties
/tepc:computed-path-properties/tepc:path-properties
/tepc:path-route-objects/tepc:path-route-object
/tepc:type:
+--:(oms-element)
+--ro oms-element-uid? string
augment /te:tunnels-path-compute/te:input/te:path-compute-info
/tepc:path-request/tepc:path-in-segment
/tepc:label-restrictions/tepc:label-restriction:
+-- grid-type? identityref
+-- priority? uint8
+-- flexi-grid
+-- slot-width-granularity? identityref
+-- min-slot-width-factor? uint16
+-- max-slot-width-factor? uint16
augment /te:tunnels-path-compute/te:input/te:path-compute-info
/tepc:path-request/tepc:path-out-segment
/tepc:label-restrictions/tepc:label-restriction:
+-- grid-type? identityref
+-- priority? uint8
+-- flexi-grid
+-- slot-width-granularity? identityref
+-- min-slot-width-factor? uint16
+-- max-slot-width-factor? uint16
augment /te:tunnels-path-compute/te:input/te:path-compute-info
/tepc:path-request/tepc:optimizations/tepc:algorithm
/tepc:metric/tepc:optimization-metric
/tepc:explicit-route-exclude-objects
/tepc:route-object-exclude-object/tepc:type/tepc:label
/tepc:label-hop/tepc:te-label/tepc:technology:
+--:(flexi-grid)
+-- (single-or-super-channel)?
+--:(single)
| +-- flexi-n? l0-types:flexi-n
| +-- flexi-m? l0-types:flexi-m
+--:(super)
+-- subcarrier-flexi-n* [flexi-n]
+-- flexi-n l0-types:flexi-n
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+-- flexi-m? l0-types:flexi-m
augment /te:tunnels-path-compute/te:input/te:path-compute-info
/tepc:path-request/tepc:optimizations/tepc:algorithm
/tepc:metric/tepc:optimization-metric
/tepc:explicit-route-include-objects
/tepc:route-object-include-object/tepc:type/tepc:label
/tepc:label-hop/tepc:te-label/tepc:technology:
+--:(flexi-grid)
+-- (single-or-super-channel)?
+--:(single)
| +-- flexi-n? l0-types:flexi-n
| +-- flexi-m? l0-types:flexi-m
+--:(super)
+-- subcarrier-flexi-n* [flexi-n]
+-- flexi-n l0-types:flexi-n
+-- flexi-m? l0-types:flexi-m
augment /te:tunnels-path-compute/te:input/te:path-compute-info
/tepc:path-request/tepc:explicit-route-objects-always
/tepc:route-object-exclude-always/tepc:type/tepc:label
/tepc:label-hop/tepc:te-label/tepc:technology:
+--:(flexi-grid)
+-- (single-or-super-channel)?
+--:(single)
| +-- flexi-n? l0-types:flexi-n
| +-- flexi-m? l0-types:flexi-m
+--:(super)
+-- subcarrier-flexi-n* [flexi-n]
+-- flexi-n l0-types:flexi-n
+-- flexi-m? l0-types:flexi-m
augment /te:tunnels-path-compute/te:input/te:path-compute-info
/tepc:path-request/tepc:explicit-route-objects-always
/tepc:route-object-include-exclude/tepc:type/tepc:label
/tepc:label-hop/tepc:te-label/tepc:technology:
+--:(flexi-grid)
+-- (single-or-super-channel)?
+--:(single)
| +-- flexi-n? l0-types:flexi-n
| +-- flexi-m? l0-types:flexi-m
+--:(super)
+-- subcarrier-flexi-n* [flexi-n]
+-- flexi-n l0-types:flexi-n
+-- flexi-m? l0-types:flexi-m
augment /te:tunnels-path-compute/te:input/te:path-compute-info
/tepc:path-request/tepc:path-in-segment
/tepc:label-restrictions/tepc:label-restriction
/tepc:label-start/tepc:te-label/tepc:technology:
+--:(flexi-grid)
+-- flexi-n? l0-types:flexi-n
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augment /te:tunnels-path-compute/te:input/te:path-compute-info
/tepc:path-request/tepc:path-in-segment
/tepc:label-restrictions/tepc:label-restriction
/tepc:label-end/tepc:te-label/tepc:technology:
+--:(flexi-grid)
+-- flexi-n? l0-types:flexi-n
augment /te:tunnels-path-compute/te:input/te:path-compute-info
/tepc:path-request/tepc:path-in-segment
/tepc:label-restrictions/tepc:label-restriction
/tepc:label-step/tepc:technology:
+--:(flexi-grid)
+-- flexi-grid-channel-spacing? identityref
+-- flexi-n-step? uint8
augment /te:tunnels-path-compute/te:input/te:path-compute-info
/tepc:path-request/tepc:path-out-segment
/tepc:label-restrictions/tepc:label-restriction
/tepc:label-start/tepc:te-label/tepc:technology:
+--:(flexi-grid)
+-- flexi-n? l0-types:flexi-n
augment /te:tunnels-path-compute/te:input/te:path-compute-info
/tepc:path-request/tepc:path-out-segment
/tepc:label-restrictions/tepc:label-restriction
/tepc:label-end/tepc:te-label/tepc:technology:
+--:(flexi-grid)
+-- flexi-n? l0-types:flexi-n
augment /te:tunnels-path-compute/te:input/te:path-compute-info
/tepc:path-request/tepc:path-out-segment
/tepc:label-restrictions/tepc:label-restriction
/tepc:label-step/tepc:technology:
+--:(flexi-grid)
+-- flexi-grid-channel-spacing? identityref
+-- flexi-n-step? uint8
augment /te:tunnels-path-compute/te:input/te:path-compute-info
/tepc:synchronization/tepc:exclude-objects/tepc:excludes
/tepc:type/tepc:label/tepc:label-hop/tepc:te-label
/tepc:technology:
+--:(flexi-grid)
+-- (single-or-super-channel)?
+--:(single)
| +-- flexi-n? l0-types:flexi-n
| +-- flexi-m? l0-types:flexi-m
+--:(super)
+-- subcarrier-flexi-n* [flexi-n]
+-- flexi-n l0-types:flexi-n
+-- flexi-m? l0-types:flexi-m
augment /te:tunnels-path-compute/te:output/te:path-compute-result
/tepc:response/tepc:computed-paths-properties
/tepc:computed-path-properties/tepc:path-properties
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/tepc:path-route-objects/tepc:path-route-object/tepc:type
/tepc:label/tepc:label-hop/tepc:te-label/tepc:technology:
+--:(flexi-grid)
+--ro (single-or-super-channel)?
+--:(single)
| +--ro flexi-n? l0-types:flexi-n
| +--ro flexi-m? l0-types:flexi-m
+--:(super)
+--ro subcarrier-flexi-n* [flexi-n]
+--ro flexi-n l0-types:flexi-n
+--ro flexi-m? l0-types:flexi-m
Figure 3: Flexi-grid path computation tree diagram
3.3. OTN Path Computation Tree Diagrams
Figure 4 below shows the tree diagram of the YANG data model defined
in module ietf-otn-path-computation.yang.
module: ietf-otn-path-computation
augment /te:tunnels-path-compute/te:input/te:path-compute-info
/tepc:path-request/tepc:te-bandwidth/tepc:technology:
+--:(otn)
+-- otn
+-- odu-type? identityref
+-- (oduflex-type)?
+--:(generic)
| +-- nominal-bit-rate uint64
+--:(cbr)
| +-- client-type identityref
+--:(gfp-n-k)
| +-- gfp-n uint8
| +-- gfp-k? gfp-k
+--:(flexe-client)
| +-- flexe-client flexe-client-rate
+--:(flexe-aware)
| +-- flexe-aware-n uint16
+--:(packet)
+-- opuflex-payload-rate uint64
augment /te:tunnels-path-compute/te:input/te:path-compute-info
/tepc:tunnel-attributes/tepc:te-bandwidth
/tepc:technology:
+--:(otn)
+-- otn
+-- odu-type? identityref
+-- (oduflex-type)?
+--:(generic)
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| +-- nominal-bit-rate uint64
+--:(cbr)
| +-- client-type identityref
+--:(gfp-n-k)
| +-- gfp-n uint8
| +-- gfp-k? gfp-k
+--:(flexe-client)
| +-- flexe-client flexe-client-rate
+--:(flexe-aware)
| +-- flexe-aware-n uint16
+--:(packet)
+-- opuflex-payload-rate uint64
augment /te:tunnels-path-compute/te:output/te:path-compute-result
/tepc:response/tepc:computed-paths-properties
/tepc:computed-path-properties/tepc:path-properties
/tepc:te-bandwidth/tepc:technology:
+--:(otn)
+--ro otn
+--ro odu-type? identityref
+--ro (oduflex-type)?
+--:(generic)
| +--ro nominal-bit-rate uint64
+--:(cbr)
| +--ro client-type identityref
+--:(gfp-n-k)
| +--ro gfp-n uint8
| +--ro gfp-k? gfp-k
+--:(flexe-client)
| +--ro flexe-client flexe-client-rate
+--:(flexe-aware)
| +--ro flexe-aware-n uint16
+--:(packet)
+--ro opuflex-payload-rate uint64
augment /te:tunnels-path-compute/te:input/te:path-compute-info
/tepc:path-request/tepc:path-in-segment
/tepc:label-restrictions/tepc:label-restriction:
+-- range-type? otn-label-range-type
+-- tsg? identityref
+-- odu-type-list* identityref
+-- priority? uint8
augment /te:tunnels-path-compute/te:input/te:path-compute-info
/tepc:path-request/tepc:path-out-segment
/tepc:label-restrictions/tepc:label-restriction:
+-- range-type? otn-label-range-type
+-- tsg? identityref
+-- odu-type-list* identityref
+-- priority? uint8
augment /te:tunnels-path-compute/te:input/te:path-compute-info
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/tepc:path-request/tepc:optimizations/tepc:algorithm
/tepc:metric/tepc:optimization-metric
/tepc:explicit-route-exclude-objects
/tepc:route-object-exclude-object/tepc:type/tepc:label
/tepc:label-hop/tepc:te-label/tepc:technology:
+--:(otn)
+-- otn-tpn? otn-tpn
+-- tsg? identityref
+-- ts-list? string
augment /te:tunnels-path-compute/te:input/te:path-compute-info
/tepc:path-request/tepc:optimizations/tepc:algorithm
/tepc:metric/tepc:optimization-metric
/tepc:explicit-route-include-objects
/tepc:route-object-include-object/tepc:type/tepc:label
/tepc:label-hop/tepc:te-label/tepc:technology:
+--:(otn)
+-- otn-tpn? otn-tpn
+-- tsg? identityref
+-- ts-list? string
augment /te:tunnels-path-compute/te:input/te:path-compute-info
/tepc:path-request/tepc:explicit-route-objects-always
/tepc:route-object-exclude-always/tepc:type/tepc:label
/tepc:label-hop/tepc:te-label/tepc:technology:
+--:(otn)
+-- otn-tpn? otn-tpn
+-- tsg? identityref
+-- ts-list? string
augment /te:tunnels-path-compute/te:input/te:path-compute-info
/tepc:path-request/tepc:explicit-route-objects-always
/tepc:route-object-include-exclude/tepc:type/tepc:label
/tepc:label-hop/tepc:te-label/tepc:technology:
+--:(otn)
+-- otn-tpn? otn-tpn
+-- tsg? identityref
+-- ts-list? string
augment /te:tunnels-path-compute/te:input/te:path-compute-info
/tepc:path-request/tepc:path-in-segment
/tepc:label-restrictions/tepc:label-restriction
/tepc:label-start/tepc:te-label/tepc:technology:
+--:(otn)
+-- (range-type)?
+--:(trib-port)
| +-- otn-tpn? otn-tpn
+--:(trib-slot)
+-- otn-ts? otn-ts
augment /te:tunnels-path-compute/te:input/te:path-compute-info
/tepc:path-request/tepc:path-in-segment
/tepc:label-restrictions/tepc:label-restriction
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/tepc:label-end/tepc:te-label/tepc:technology:
+--:(otn)
+-- (range-type)?
+--:(trib-port)
| +-- otn-tpn? otn-tpn
+--:(trib-slot)
+-- otn-ts? otn-ts
augment /te:tunnels-path-compute/te:input/te:path-compute-info
/tepc:path-request/tepc:path-in-segment
/tepc:label-restrictions/tepc:label-restriction
/tepc:label-step/tepc:technology:
+--:(otn)
+-- (range-type)?
+--:(trib-port)
| +-- otn-tpn? otn-tpn
+--:(trib-slot)
+-- otn-ts? otn-ts
augment /te:tunnels-path-compute/te:input/te:path-compute-info
/tepc:path-request/tepc:path-out-segment
/tepc:label-restrictions/tepc:label-restriction
/tepc:label-start/tepc:te-label/tepc:technology:
+--:(otn)
+-- (range-type)?
+--:(trib-port)
| +-- otn-tpn? otn-tpn
+--:(trib-slot)
+-- otn-ts? otn-ts
augment /te:tunnels-path-compute/te:input/te:path-compute-info
/tepc:path-request/tepc:path-out-segment
/tepc:label-restrictions/tepc:label-restriction
/tepc:label-end/tepc:te-label/tepc:technology:
+--:(otn)
+-- (range-type)?
+--:(trib-port)
| +-- otn-tpn? otn-tpn
+--:(trib-slot)
+-- otn-ts? otn-ts
augment /te:tunnels-path-compute/te:input/te:path-compute-info
/tepc:path-request/tepc:path-out-segment
/tepc:label-restrictions/tepc:label-restriction
/tepc:label-step/tepc:technology:
+--:(otn)
+-- (range-type)?
+--:(trib-port)
| +-- otn-tpn? otn-tpn
+--:(trib-slot)
+-- otn-ts? otn-ts
augment /te:tunnels-path-compute/te:input/te:path-compute-info
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/tepc:synchronization/tepc:exclude-objects/tepc:excludes
/tepc:type/tepc:label/tepc:label-hop/tepc:te-label
/tepc:technology:
+--:(otn)
+-- otn-tpn? otn-tpn
+-- tsg? identityref
+-- ts-list? string
augment /te:tunnels-path-compute/te:output/te:path-compute-result
/tepc:response/tepc:computed-paths-properties
/tepc:computed-path-properties/tepc:path-properties
/tepc:path-route-objects/tepc:path-route-object/tepc:type
/tepc:label/tepc:label-hop/tepc:te-label/tepc:technology:
+--:(otn)
+--ro otn-tpn? otn-tpn
+--ro tsg? identityref
+--ro ts-list? string
Figure 4: OTN path computation tree diagram
4. YANG Models for Optical Path Computation
4.1. YANG Model for WSON Path Computation
<CODE BEGINS> file "ietf-wson-path-computation@2022-03-07.yang"
module ietf-wson-path-computation {
yang-version 1.1;
namespace "urn:ietf:params:xml:ns:yang:ietf-wson-path-computation";
prefix "wson-pc";
import ietf-te-path-computation {
prefix "tepc";
revision-date "2021-09-06";
reference
"I-D.ietf-teas-yang-path-computation-14: Yang model
for requesting Path Computation.";
}
import ietf-te {
prefix "te";
revision-date "2021-02-20";
reference
"I-D.ietf-teas-yang-te-19: A YANG Data Model for Traffic
Engineering Tunnels and Interfaces. ";
}
import ietf-layer0-types {
prefix "l0-types";
}
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organization
"IETF CCAMP Working Group";
contact
"WG Web: <http://tools.ietf.org/wg/ccamp/>
WG List: <mailto:ccamp@ietf.org>
Editor: Aihua Guo
<mailto:aihuaguo.ietf@gmail.com>
Editor: Italo Busi
<mailto:italo.busi@huawei.com>
Editor: Sergio Belotti
<mailto:sergio.belotti@nokia.com>";
description
"This module defines a model for requesting
WSON Path Computation.
The model fully conforms to the Network Management
Datastore Architecture (NMDA).
Copyright (c) 2022 IETF Trust and the persons
identified as authors of the code. All rights reserved.
Redistribution and use in source and binary forms, with or
without modification, is permitted pursuant to, and subject
to the license terms contained in, the Simplified BSD License
set forth in Section 4.c of the IETF Trust's Legal Provisions
Relating to IETF Documents
(https://trustee.ietf.org/license-info).
This version of this YANG module is part of RFC XXXX; see
the RFC itself for full legal notices.";
revision "2022-03-07" {
description
"Initial version.";
reference
"RFC XXXX: YANG Model for OTN and Optical Path Computation";
// RFC Ed.: replace XXXX with actual RFC number, update date
// information and remove this note
}
/*
* Data nodes
*/
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augment "/te:tunnels-path-compute/te:input/te:path-compute-info/"
+ "tepc:path-request" {
description
"Augment with additional constraints for WSON paths.";
uses l0-types:l0-tunnel-attributes;
uses l0-types:l0-path-constraints;
}
augment "/te:tunnels-path-compute/te:output/"
+ "te:path-compute-result/tepc:response/"
+ "tepc:computed-paths-properties/"
+ "tepc:computed-path-properties/tepc:path-properties" {
description
"Augment with additional properties for WSON paths.";
uses l0-types:l0-path-properties;
}
/*
* Augment Route Hop
*/
augment "/te:tunnels-path-compute/te:input/te:path-compute-info/"
+ "tepc:path-request/tepc:optimizations/tepc:algorithm/"
+ "tepc:metric/tepc:optimization-metric/"
+ "tepc:explicit-route-exclude-objects/"
+ "tepc:route-object-exclude-object/tepc:type" {
description
"Augment the route hop for the optimization of the explicit
route objects excluded by the path computation of the requested
path.";
case oms-element {
leaf oms-element-uid {
type string;
description
"The unique id of the OMS element.";
}
description
"The OMS element route hop type";
}
}
augment "/te:tunnels-path-compute/te:input/te:path-compute-info/"
+ "tepc:path-request/tepc:optimizations/tepc:algorithm/"
+ "tepc:metric/tepc:optimization-metric/"
+ "tepc:explicit-route-include-objects/"
+ "tepc:route-object-include-object/tepc:type" {
description
"Augment the route hop for the optimization of the explicit
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route objects included by the path computation of the requested
path.";
case oms-element {
leaf oms-element-uid {
type string;
description
"The unique id of the OMS element.";
}
description
"The OMS element route hop type";
}
}
augment "/te:tunnels-path-compute/te:input/te:path-compute-info/"
+ "tepc:path-request/tepc:explicit-route-objects-always/"
+ "tepc:route-object-exclude-always/tepc:type" {
description
"Augment the route hop for the explicit route objects always
excluded by the path computation of the requested path.";
case oms-element {
leaf oms-element-uid {
type string;
description
"The unique id of the OMS element.";
}
description
"The OMS element route hop type";
}
}
augment "/te:tunnels-path-compute/te:input/te:path-compute-info/"
+ "tepc:path-request/tepc:explicit-route-objects-always/"
+ "tepc:route-object-include-exclude/tepc:type" {
description
"Augment the route hop for the explicit route objects included
or excluded by the path computation of the requested path.";
case oms-element {
leaf oms-element-uid {
type string;
description
"The unique id of the OMS element.";
}
description
"The OMS element route hop type";
}
}
augment "/te:tunnels-path-compute/te:input/te:path-compute-info/"
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+ "tepc:synchronization/tepc:exclude-objects/tepc:excludes/"
+ "tepc:type" {
description
"Augment the route hop for the explicit route objects to always
exclude from synchronized path computation.";
case oms-element {
leaf oms-element-uid {
type string;
description
"The unique id of the OMS element.";
}
description
"The OMS element route hop type";
}
}
augment "/te:tunnels-path-compute/te:output/"
+ "te:path-compute-result/tepc:response/"
+ "tepc:computed-paths-properties/"
+ "tepc:computed-path-properties/tepc:path-properties/"
+ "tepc:path-route-objects/tepc:path-route-object/"
+ "tepc:type" {
description
"Augment the route hop for the route object of the computed
path.";
case oms-element {
leaf oms-element-uid {
type string;
description
"The unique id of the OMS element.";
}
description
"The OMS element route hop type";
}
}
/*
* Augment TE label range information
*/
augment "/te:tunnels-path-compute/te:input/te:path-compute-info/"
+ "tepc:path-request/tepc:path-in-segment/"
+ "tepc:label-restrictions/tepc:label-restriction" {
description
"Augment TE label range information for the ingress segment
of the requested path.";
uses l0-types:l0-label-range-info;
}
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augment "/te:tunnels-path-compute/te:input/te:path-compute-info/"
+ "tepc:path-request/tepc:path-out-segment/"
+ "tepc:label-restrictions/tepc:label-restriction" {
description
"Augment TE label range information for the egress segment
of the requested path.";
uses l0-types:l0-label-range-info;
}
/*
* Augment TE label.
*/
augment "/te:tunnels-path-compute/te:input/te:path-compute-info/"
+ "tepc:path-request/tepc:optimizations/tepc:algorithm/"
+ "tepc:metric/tepc:optimization-metric/"
+ "tepc:explicit-route-exclude-objects/"
+ "tepc:route-object-exclude-object/tepc:type/tepc:label/"
+ "tepc:label-hop/tepc:te-label/tepc:technology" {
description
"Augment TE label hop for the optimization of the explicit
route objects excluded by the path computation of the requested
path.";
case wson {
uses l0-types:wson-label-hop;
}
}
augment "/te:tunnels-path-compute/te:input/te:path-compute-info/"
+ "tepc:path-request/tepc:optimizations/tepc:algorithm/"
+ "tepc:metric/tepc:optimization-metric/"
+ "tepc:explicit-route-include-objects/"
+ "tepc:route-object-include-object/tepc:type/tepc:label/"
+ "tepc:label-hop/tepc:te-label/tepc:technology" {
description
"Augment TE label hop for the optimization of the explicit
route objects included by the path computation of the requested
path.";
case wson {
uses l0-types:wson-label-hop;
}
}
augment "/te:tunnels-path-compute/te:input/te:path-compute-info/"
+ "tepc:path-request/tepc:explicit-route-objects-always/"
+ "tepc:route-object-exclude-always/tepc:type/tepc:label/"
+ "tepc:label-hop/tepc:te-label/tepc:technology" {
description
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"Augment TE label hop for the explicit route objects always
excluded by the path computation of the requested path.";
case wson {
uses l0-types:wson-label-hop;
}
}
augment "/te:tunnels-path-compute/te:input/te:path-compute-info/"
+ "tepc:path-request/tepc:explicit-route-objects-always/"
+ "tepc:route-object-include-exclude/tepc:type/tepc:label/"
+ "tepc:label-hop/tepc:te-label/tepc:technology" {
description
"Augment TE label hop for the explicit route objects included
or excluded by the path computation of the requested path.";
case wson {
uses l0-types:wson-label-hop;
}
}
augment "/te:tunnels-path-compute/te:input/te:path-compute-info/"
+ "tepc:path-request/tepc:path-in-segment/"
+ "tepc:label-restrictions/tepc:label-restriction/"
+ "tepc:label-start/tepc:te-label/tepc:technology" {
description
"Augment TE label range start for the ingress segment
of the requested path.";
case wson {
uses l0-types:wson-label-start-end;
}
}
augment "/te:tunnels-path-compute/te:input/te:path-compute-info/"
+ "tepc:path-request/tepc:path-in-segment/"
+ "tepc:label-restrictions/tepc:label-restriction/"
+ "tepc:label-end/tepc:te-label/tepc:technology" {
description
"Augment TE label range end for the ingress segment
of the requested path.";
case wson {
uses l0-types:wson-label-start-end;
}
}
augment "/te:tunnels-path-compute/te:input/te:path-compute-info/"
+ "tepc:path-request/tepc:path-in-segment/"
+ "tepc:label-restrictions/tepc:label-restriction/"
+ "tepc:label-step/tepc:technology" {
description
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"Augment TE label range step for the ingress segment
of the requested path.";
case wson {
uses l0-types:wson-label-step;
}
}
augment "/te:tunnels-path-compute/te:input/te:path-compute-info/"
+ "tepc:path-request/tepc:path-out-segment/"
+ "tepc:label-restrictions/tepc:label-restriction/"
+ "tepc:label-start/tepc:te-label/tepc:technology" {
description
"Augment TE label range start for the egress segment
of the requested path.";
case wson {
uses l0-types:wson-label-start-end;
}
}
augment "/te:tunnels-path-compute/te:input/te:path-compute-info/"
+ "tepc:path-request/tepc:path-out-segment/"
+ "tepc:label-restrictions/tepc:label-restriction/"
+ "tepc:label-end/tepc:te-label/tepc:technology" {
description
"Augment TE label range end for the egress segment
of the requested path.";
case wson {
uses l0-types:wson-label-start-end;
}
}
augment "/te:tunnels-path-compute/te:input/te:path-compute-info/"
+ "tepc:path-request/tepc:path-out-segment/"
+ "tepc:label-restrictions/tepc:label-restriction/"
+ "tepc:label-step/tepc:technology" {
description
"Augment TE label range end for the egress segment
of the requested path.";
case wson {
uses l0-types:wson-label-step;
}
}
augment "/te:tunnels-path-compute/te:input/te:path-compute-info/"
+ "tepc:synchronization/tepc:exclude-objects/tepc:excludes/"
+ "tepc:type/tepc:label/tepc:label-hop/"
+ "tepc:te-label/tepc:technology" {
description
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"Augment TE label hop for the explicit route objects to always
exclude from synchronized path computation.";
case wson {
uses l0-types:wson-label-hop;
}
}
augment "/te:tunnels-path-compute/te:output/"
+ "te:path-compute-result/tepc:response/"
+ "tepc:computed-paths-properties/"
+ "tepc:computed-path-properties/tepc:path-properties/"
+ "tepc:path-route-objects/tepc:path-route-object/"
+ "tepc:type/tepc:label/"
+ "tepc:label-hop/tepc:te-label/tepc:technology" {
description
"Augment TE label hop for the route object of the computed
path.";
case wson {
uses l0-types:wson-label-hop;
}
}
}
<CODE ENDS>
Figure 5: WSON path computation YANG module
4.2. YANG Model for Flexi-grid Path Computation
<CODE BEGINS> file "ietf-flexi-grid-path-computation@2022-03-07.yang"
module ietf-flexi-grid-path-computation {
yang-version 1.1;
namespace
"urn:ietf:params:xml:ns:yang:ietf-flexi-grid-path-computation";
prefix "flexg-pc";
import ietf-te-path-computation {
prefix "tepc";
revision-date "2021-09-06";
reference
"I-D.ietf-teas-yang-path-computation-14: Yang model
for requesting Path Computation.";
}
import ietf-te {
prefix "te";
revision-date "2021-02-20";
reference
"I-D.ietf-teas-yang-te-19: A YANG Data Model for Traffic
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Engineering Tunnels and Interfaces. ";
}
import ietf-layer0-types {
prefix "l0-types";
}
organization
"IETF CCAMP Working Group";
contact
"WG Web: <http://tools.ietf.org/wg/ccamp/>
WG List: <mailto:ccamp@ietf.org>
Editor: Aihua Guo
<mailto:aihuaguo.ietf@gmail.com>
Editor: Italo Busi
<mailto:italo.busi@huawei.com>
Editor: Sergio Belotti
<mailto:sergio.belotti@nokia.com>";
description
"This module defines a model for requesting
Flexi-grid Path Computation.
The model fully conforms to the Network Management
Datastore Architecture (NMDA).
Copyright (c) 2022 IETF Trust and the persons
identified as authors of the code. All rights reserved.
Redistribution and use in source and binary forms, with or
without modification, is permitted pursuant to, and subject
to the license terms contained in, the Simplified BSD License
set forth in Section 4.c of the IETF Trust's Legal Provisions
Relating to IETF Documents
(https://trustee.ietf.org/license-info).
This version of this YANG module is part of RFC XXXX; see
the RFC itself for full legal notices.";
revision "2022-03-07" {
description
"Initial version.";
reference
"RFC XXXX: YANG Model for OTN and Optical Path Computation";
// RFC Ed.: replace XXXX with actual RFC number, update date
Busi, et al. Expires 8 September 2022 [Page 28]
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// information and remove this note
}
/*
* Data nodes
*/
augment "/te:tunnels-path-compute/te:input/te:path-compute-info/"
+ "tepc:path-request" {
description
"Augment with additional constraints flexi-grid
media channel.";
uses l0-types:l0-tunnel-attributes;
uses l0-types:l0-path-constraints;
}
augment "/te:tunnels-path-compute/te:output/"
+ "te:path-compute-result/tepc:response/"
+ "tepc:computed-paths-properties/"
+ "tepc:computed-path-properties/tepc:path-properties" {
description
"Augment with additional properties for Flexi-grid paths.";
uses l0-types:l0-path-properties;
}
/*
* Augment Route Hop
*/
augment "/te:tunnels-path-compute/te:input/te:path-compute-info/"
+ "tepc:path-request/tepc:optimizations/tepc:algorithm/"
+ "tepc:metric/tepc:optimization-metric/"
+ "tepc:explicit-route-exclude-objects/"
+ "tepc:route-object-exclude-object/tepc:type" {
description
"Augment the route hop for the optimization of the explicit
route objects excluded by the path computation of the requested
path.";
case oms-element {
leaf oms-element-uid {
type string;
description
"The unique id of the OMS element.";
}
description
"The OMS element route hop type";
}
}
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augment "/te:tunnels-path-compute/te:input/te:path-compute-info/"
+ "tepc:path-request/tepc:optimizations/tepc:algorithm/"
+ "tepc:metric/tepc:optimization-metric/"
+ "tepc:explicit-route-include-objects/"
+ "tepc:route-object-include-object/tepc:type" {
description
"Augment the route hop for the optimization of the explicit
route objects included by the path computation of the requested
path.";
case oms-element {
leaf oms-element-uid {
type string;
description
"The unique id of the OMS element.";
}
description
"The OMS element route hop type";
}
}
augment "/te:tunnels-path-compute/te:input/te:path-compute-info/"
+ "tepc:path-request/tepc:explicit-route-objects-always/"
+ "tepc:route-object-exclude-always/tepc:type" {
description
"Augment the route hop for the explicit route objects always
excluded by the path computation of the requested path.";
case oms-element {
leaf oms-element-uid {
type string;
description
"The unique id of the OMS element.";
}
description
"The OMS element route hop type";
}
}
augment "/te:tunnels-path-compute/te:input/te:path-compute-info/"
+ "tepc:path-request/tepc:explicit-route-objects-always/"
+ "tepc:route-object-include-exclude/tepc:type" {
description
"Augment the route hop for the explicit route objects included
or excluded by the path computation of the requested path.";
case oms-element {
leaf oms-element-uid {
type string;
description
"The unique id of the OMS element.";
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}
description
"The OMS element route hop type";
}
}
augment "/te:tunnels-path-compute/te:input/te:path-compute-info/"
+ "tepc:synchronization/tepc:exclude-objects/tepc:excludes/"
+ "tepc:type" {
description
"Augment the route hop for the explicit route objects to always
exclude from synchronized path computation.";
case oms-element {
leaf oms-element-uid {
type string;
description
"The unique id of the OMS element.";
}
description
"The OMS element route hop type";
}
}
augment "/te:tunnels-path-compute/te:output/"
+ "te:path-compute-result/tepc:response/"
+ "tepc:computed-paths-properties/"
+ "tepc:computed-path-properties/tepc:path-properties/"
+ "tepc:path-route-objects/tepc:path-route-object/"
+ "tepc:type" {
description
"Augment the route hop for the route object of the computed
path.";
case oms-element {
leaf oms-element-uid {
type string;
description
"The unique id of the OMS element.";
}
description
"The OMS element route hop type";
}
}
/*
* Augment TE label range information
*/
augment "/te:tunnels-path-compute/te:input/te:path-compute-info/"
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+ "tepc:path-request/tepc:path-in-segment/"
+ "tepc:label-restrictions/tepc:label-restriction" {
description
"Augment TE label range information for the ingress segment
of the requested path.";
uses l0-types:flexi-grid-label-range-info;
}
augment "/te:tunnels-path-compute/te:input/te:path-compute-info/"
+ "tepc:path-request/tepc:path-out-segment/"
+ "tepc:label-restrictions/tepc:label-restriction" {
description
"Augment TE label range information for the egress segment
of the requested path.";
uses l0-types:flexi-grid-label-range-info;
}
/*
* Augment TE label.
*/
augment "/te:tunnels-path-compute/te:input/te:path-compute-info/"
+ "tepc:path-request/tepc:optimizations/tepc:algorithm/"
+ "tepc:metric/tepc:optimization-metric/"
+ "tepc:explicit-route-exclude-objects/"
+ "tepc:route-object-exclude-object/tepc:type/tepc:label/"
+ "tepc:label-hop/tepc:te-label/tepc:technology" {
description
"Augment TE label hop for the optimization of the explicit
route objects excluded by the path computation of the requested
path.";
case flexi-grid {
uses l0-types:flexi-grid-label-hop;
}
}
augment "/te:tunnels-path-compute/te:input/te:path-compute-info/"
+ "tepc:path-request/tepc:optimizations/tepc:algorithm/"
+ "tepc:metric/tepc:optimization-metric/"
+ "tepc:explicit-route-include-objects/"
+ "tepc:route-object-include-object/tepc:type/tepc:label/"
+ "tepc:label-hop/tepc:te-label/tepc:technology" {
description
"Augment TE label hop for the optimization of the explicit
route objects included by the path computation of the requested
path.";
case flexi-grid {
uses l0-types:flexi-grid-label-hop;
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}
}
augment "/te:tunnels-path-compute/te:input/te:path-compute-info/"
+ "tepc:path-request/tepc:explicit-route-objects-always/"
+ "tepc:route-object-exclude-always/tepc:type/tepc:label/"
+ "tepc:label-hop/tepc:te-label/tepc:technology" {
description
"Augment TE label hop for the explicit route objects always
excluded by the path computation of the requested path.";
case flexi-grid {
uses l0-types:flexi-grid-label-hop;
}
}
augment "/te:tunnels-path-compute/te:input/te:path-compute-info/"
+ "tepc:path-request/tepc:explicit-route-objects-always/"
+ "tepc:route-object-include-exclude/tepc:type/tepc:label/"
+ "tepc:label-hop/tepc:te-label/tepc:technology" {
description
"Augment TE label hop for the explicit route objects included
or excluded by the path computation of the requested path.";
case flexi-grid {
uses l0-types:flexi-grid-label-hop;
}
}
augment "/te:tunnels-path-compute/te:input/te:path-compute-info/"
+ "tepc:path-request/tepc:path-in-segment/"
+ "tepc:label-restrictions/tepc:label-restriction/"
+ "tepc:label-start/tepc:te-label/tepc:technology" {
description
"Augment TE label range start for the ingress segment
of the requested path.";
case flexi-grid {
uses l0-types:flexi-grid-label-start-end;
}
}
augment "/te:tunnels-path-compute/te:input/te:path-compute-info/"
+ "tepc:path-request/tepc:path-in-segment/"
+ "tepc:label-restrictions/tepc:label-restriction/"
+ "tepc:label-end/tepc:te-label/tepc:technology" {
description
"Augment TE label range end for the ingress segment
of the requested path.";
case flexi-grid {
uses l0-types:flexi-grid-label-start-end;
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}
}
augment "/te:tunnels-path-compute/te:input/te:path-compute-info/"
+ "tepc:path-request/tepc:path-in-segment/"
+ "tepc:label-restrictions/tepc:label-restriction/"
+ "tepc:label-step/tepc:technology" {
description
"Augment TE label range step for the ingress segment
of the requested path.";
case flexi-grid {
uses l0-types:flexi-grid-label-step;
}
}
augment "/te:tunnels-path-compute/te:input/te:path-compute-info/"
+ "tepc:path-request/tepc:path-out-segment/"
+ "tepc:label-restrictions/tepc:label-restriction/"
+ "tepc:label-start/tepc:te-label/tepc:technology" {
description
"Augment TE label range start for the egress segment
of the requested path.";
case flexi-grid {
uses l0-types:flexi-grid-label-start-end;
}
}
augment "/te:tunnels-path-compute/te:input/te:path-compute-info/"
+ "tepc:path-request/tepc:path-out-segment/"
+ "tepc:label-restrictions/tepc:label-restriction/"
+ "tepc:label-end/tepc:te-label/tepc:technology" {
description
"Augment TE label range end for the egress segment
of the requested path.";
case flexi-grid {
uses l0-types:flexi-grid-label-start-end;
}
}
augment "/te:tunnels-path-compute/te:input/te:path-compute-info/"
+ "tepc:path-request/tepc:path-out-segment/"
+ "tepc:label-restrictions/tepc:label-restriction/"
+ "tepc:label-step/tepc:technology" {
description
"Augment TE label range end for the egress segment
of the requested path.";
case flexi-grid {
uses l0-types:flexi-grid-label-step;
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}
}
augment "/te:tunnels-path-compute/te:input/te:path-compute-info/"
+ "tepc:synchronization/tepc:exclude-objects/tepc:excludes/"
+ "tepc:type/tepc:label/tepc:label-hop/"
+ "tepc:te-label/tepc:technology" {
description
"Augment TE label hop for the explicit route objects to always
exclude from synchronized path computation.";
case flexi-grid {
uses l0-types:flexi-grid-label-hop;
}
}
augment "/te:tunnels-path-compute/te:output/"
+ "te:path-compute-result/tepc:response/"
+ "tepc:computed-paths-properties/"
+ "tepc:computed-path-properties/tepc:path-properties/"
+ "tepc:path-route-objects/tepc:path-route-object/"
+ "tepc:type/tepc:label/"
+ "tepc:label-hop/tepc:te-label/tepc:technology" {
description
"Augment TE label hop for the route object of the computed
path.";
case flexi-grid {
uses l0-types:flexi-grid-label-hop;
}
}
}
<CODE ENDS>
Figure 6: Flexi-grid path computation YANG module
4.3. YANG Model for OTN Path Computation
<CODE BEGINS> file "ietf-otn-path-computation@2021-10-07.yang"
module ietf-otn-path-computation {
yang-version 1.1;
namespace "urn:ietf:params:xml:ns:yang:ietf-otn-path-computation";
prefix "otn-pc";
import ietf-te-path-computation {
prefix "tepc";
revision-date "2021-09-06";
reference
"I-D.ietf-teas-yang-path-computation-14: Yang model
for requesting Path Computation.";
Busi, et al. Expires 8 September 2022 [Page 35]
Internet-Draft Yang for Optical Path Computation March 2022
}
import ietf-te {
prefix "te";
revision-date "2021-02-20";
reference
"I-D.ietf-teas-yang-te-19: A YANG Data Model for Traffic
Engineering Tunnels and Interfaces. ";
}
import ietf-layer1-types {
prefix "l1-types";
reference
"I-D.ietf-ccamp-layer1-types:
A YANG Data Model for Layer 1 Types. ";
}
organization
"IETF CCAMP Working Group";
contact
"WG Web: <http://tools.ietf.org/wg/ccamp/>
WG List: <mailto:ccamp@ietf.org>
Editor: Aihua Guo
<mailto:aihuaguo.ietf@gmail.com>
Editor: Italo Busi
<mailto:italo.busi@huawei.com>
Editor: Sergio Belotti
<mailto:sergio.belotti@nokia.com>";
description
"This module defines a model for requesting
OTN Path Computation.
The model fully conforms to the Network Management
Datastore Architecture (NMDA).
Copyright (c) 2021 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
(https://trustee.ietf.org/license-info).
Busi, et al. Expires 8 September 2022 [Page 36]
Internet-Draft Yang for Optical Path Computation March 2022
This version of this YANG module is part of RFC XXXX; see
the RFC itself for full legal notices.";
revision "2021-10-07" {
description
"Initial version.";
reference
"RFC XXXX: YANG Model for OTN and Optical Path Computation";
// RFC Ed.: replace XXXX with actual RFC number, update date
// information and remove this note
}
/*
* Data nodes
*/
/*
* Augment TE bandwidth
*/
augment "/te:tunnels-path-compute/te:input/te:path-compute-info/"
+ "tepc:path-request/tepc:te-bandwidth/tepc:technology" {
description
"Augment TE bandwidth of the requested path.";
case otn {
uses l1-types:otn-path-bandwidth;
}
}
augment "/te:tunnels-path-compute/te:input/te:path-compute-info/"
+ "tepc:tunnel-attributes/tepc:te-bandwidth/"
+ "tepc:technology" {
description
"Augment TE bandwidth of the requested tunnel attributes.";
case otn {
uses l1-types:otn-path-bandwidth;
}
}
augment "/te:tunnels-path-compute/te:output/"
+ "te:path-compute-result/tepc:response/"
+ "tepc:computed-paths-properties/"
+ "tepc:computed-path-properties/tepc:path-properties/"
+ "tepc:te-bandwidth/tepc:technology" {
description
"Augment TE bandwidth of the computed path properties.";
case otn {
uses l1-types:otn-path-bandwidth;
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}
}
/*
* Augment TE label range information
*/
augment "/te:tunnels-path-compute/te:input/te:path-compute-info/"
+ "tepc:path-request/tepc:path-in-segment/"
+ "tepc:label-restrictions/tepc:label-restriction" {
description
"Augment TE label range information for the ingress segment
of the requested path.";
uses l1-types:otn-label-range-info;
}
augment "/te:tunnels-path-compute/te:input/te:path-compute-info/"
+ "tepc:path-request/tepc:path-out-segment/"
+ "tepc:label-restrictions/tepc:label-restriction" {
description
"Augment TE label range information for the egress segment
of the requested path.";
uses l1-types:otn-label-range-info;
}
/*
* Augment TE label.
*/
augment "/te:tunnels-path-compute/te:input/te:path-compute-info/"
+ "tepc:path-request/tepc:optimizations/tepc:algorithm/"
+ "tepc:metric/tepc:optimization-metric/"
+ "tepc:explicit-route-exclude-objects/"
+ "tepc:route-object-exclude-object/tepc:type/tepc:label/"
+ "tepc:label-hop/tepc:te-label/tepc:technology" {
description
"Augment TE label hop for the optimization of the explicit
route objects excluded by the path computation of the requested
path.";
case otn {
uses l1-types:otn-label-hop;
}
}
augment "/te:tunnels-path-compute/te:input/te:path-compute-info/"
+ "tepc:path-request/tepc:optimizations/tepc:algorithm/"
+ "tepc:metric/tepc:optimization-metric/"
+ "tepc:explicit-route-include-objects/"
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+ "tepc:route-object-include-object/tepc:type/tepc:label/"
+ "tepc:label-hop/tepc:te-label/tepc:technology" {
description
"Augment TE label hop for the optimization of the explicit
route objects included by the path computation of the requested
path.";
case otn {
uses l1-types:otn-label-hop;
}
}
augment "/te:tunnels-path-compute/te:input/te:path-compute-info/"
+ "tepc:path-request/tepc:explicit-route-objects-always/"
+ "tepc:route-object-exclude-always/tepc:type/tepc:label/"
+ "tepc:label-hop/tepc:te-label/tepc:technology" {
description
"Augment TE label hop for the explicit route objects always
excluded by the path computation of the requested path.";
case otn {
uses l1-types:otn-label-hop;
}
}
augment "/te:tunnels-path-compute/te:input/te:path-compute-info/"
+ "tepc:path-request/tepc:explicit-route-objects-always/"
+ "tepc:route-object-include-exclude/tepc:type/tepc:label/"
+ "tepc:label-hop/tepc:te-label/tepc:technology" {
description
"Augment TE label hop for the explicit route objects included
or excluded by the path computation of the requested path.";
case otn {
uses l1-types:otn-label-hop;
}
}
augment "/te:tunnels-path-compute/te:input/te:path-compute-info/"
+ "tepc:path-request/tepc:path-in-segment/"
+ "tepc:label-restrictions/tepc:label-restriction/"
+ "tepc:label-start/tepc:te-label/tepc:technology" {
description
"Augment TE label range start for the ingress segment
of the requested path.";
case otn {
uses l1-types:otn-label-start-end;
}
}
augment "/te:tunnels-path-compute/te:input/te:path-compute-info/"
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+ "tepc:path-request/tepc:path-in-segment/"
+ "tepc:label-restrictions/tepc:label-restriction/"
+ "tepc:label-end/tepc:te-label/tepc:technology" {
description
"Augment TE label range end for the ingress segment
of the requested path.";
case otn {
uses l1-types:otn-label-start-end;
}
}
augment "/te:tunnels-path-compute/te:input/te:path-compute-info/"
+ "tepc:path-request/tepc:path-in-segment/"
+ "tepc:label-restrictions/tepc:label-restriction/"
+ "tepc:label-step/tepc:technology" {
description
"Augment TE label range step for the ingress segment
of the requested path.";
case otn {
uses l1-types:otn-label-step;
}
}
augment "/te:tunnels-path-compute/te:input/te:path-compute-info/"
+ "tepc:path-request/tepc:path-out-segment/"
+ "tepc:label-restrictions/tepc:label-restriction/"
+ "tepc:label-start/tepc:te-label/tepc:technology" {
description
"Augment TE label range start for the egress segment
of the requested path.";
case otn {
uses l1-types:otn-label-start-end;
}
}
augment "/te:tunnels-path-compute/te:input/te:path-compute-info/"
+ "tepc:path-request/tepc:path-out-segment/"
+ "tepc:label-restrictions/tepc:label-restriction/"
+ "tepc:label-end/tepc:te-label/tepc:technology" {
description
"Augment TE label range end for the egress segment
of the requested path.";
case otn {
uses l1-types:otn-label-start-end;
}
}
augment "/te:tunnels-path-compute/te:input/te:path-compute-info/"
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+ "tepc:path-request/tepc:path-out-segment/"
+ "tepc:label-restrictions/tepc:label-restriction/"
+ "tepc:label-step/tepc:technology" {
description
"Augment TE label range end for the egress segment
of the requested path.";
case otn {
uses l1-types:otn-label-step;
}
}
augment "/te:tunnels-path-compute/te:input/te:path-compute-info/"
+ "tepc:synchronization/tepc:exclude-objects/tepc:excludes/"
+ "tepc:type/tepc:label/tepc:label-hop/"
+ "tepc:te-label/tepc:technology" {
description
"Augment TE label hop for the explicit route objects to always
exclude from synchronized path computation.";
case otn {
uses l1-types:otn-label-hop;
}
}
augment "/te:tunnels-path-compute/te:output/"
+ "te:path-compute-result/tepc:response/"
+ "tepc:computed-paths-properties/"
+ "tepc:computed-path-properties/tepc:path-properties/"
+ "tepc:path-route-objects/tepc:path-route-object/"
+ "tepc:type/tepc:label/"
+ "tepc:label-hop/tepc:te-label/tepc:technology" {
description
"Augment TE label hop for the route object of the computed
path.";
case otn {
uses l1-types:otn-label-hop;
}
}
}
<CODE ENDS>
Figure 7: OTN path computation YANG module
5. Manageability Considerations
TBD.
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6. Security Considerations
<Add any security considerations>
7. IANA Considerations
This document registers the following URIs in the "ns" subregistry
within the "IETF XML registry" [RFC3688].
URI: urn:ietf:params:xml:ns:yang:ietf-otn-path-computation
Registrant Contact: The IESG.
XML: N/A, the requested URI is an XML namespace.
URI: urn:ietf:params:xml:ns:yang:ietf-wson-path-computation
Registrant Contact: The IESG.
XML: N/A, the requested URI is an XML namespace.
URI: urn:ietf:params:xml:ns:yang:ietf-flexi-grid-path-computation
Registrant Contact: The IESG.
XML: N/A, the requested URI is an XML namespace.
This document registers the following YANG module in the "YANG Module
Names" registry [RFC7950].
name: ietf-otn-path-computation
namespace: urn:ietf:params:xml:ns:yang:ietf-otn-path-computation
prefix: otn-pc
reference: this document
name: ietf-wson-path-computation
namespace: urn:ietf:params:xml:ns:yang:ietf-wson-path-computation
prefix: wson-pc
reference: this document
name: ietf-flexi-grid-path-computation
namespace: ietf:params:xml:ns:yang:ietf-flexi-grid-path-computation
prefix: flexg-pc
reference: this document
8. References
8.1. Normative References
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[I-D.ietf-ccamp-layer0-types-ext]
Beller, D., Belotti, S., Zheng, H., Busi, I., and E. L.
Rouzic, "A YANG Data Model for Layer 0 Types - Revision
2", Work in Progress, Internet-Draft, draft-ietf-ccamp-
layer0-types-ext-01, 25 October 2021,
<https://www.ietf.org/archive/id/draft-ietf-ccamp-layer0-
types-ext-01.txt>.
[I-D.ietf-ccamp-layer1-types]
Zheng, H. and I. Busi, "A YANG Data Model for Layer 1
Types", Work in Progress, Internet-Draft, draft-ietf-
ccamp-layer1-types-11, 7 September 2021,
<https://www.ietf.org/archive/id/draft-ietf-ccamp-layer1-
types-11.txt>.
[I-D.ietf-teas-yang-path-computation]
Busi, I., Belotti, S., Dios, O. G. D., Sharma, A., Shi,
Y., and D. Ceccarelli, "A YANG Data Model for requesting
path computation", Work in Progress, Internet-Draft,
draft-ietf-teas-yang-path-computation-17, 7 March 2022,
<https://www.ietf.org/archive/id/draft-ietf-teas-yang-
path-computation-17.txt>.
[I-D.ietf-teas-yang-te]
Saad, T., Gandhi, R., Liu, X., Beeram, V. P., Bryskin, I.,
and O. G. D. Dios, "A YANG Data Model for Traffic
Engineering Tunnels, Label Switched Paths and Interfaces",
Work in Progress, Internet-Draft, draft-ietf-teas-yang-te-
29, 7 February 2022, <https://www.ietf.org/archive/id/
draft-ietf-teas-yang-te-29.txt>.
[RFC3688] Mealling, M., "The IETF XML Registry", BCP 81, RFC 3688,
DOI 10.17487/RFC3688, January 2004,
<https://www.rfc-editor.org/info/rfc3688>.
[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>.
[RFC7699] Farrel, A., King, D., Li, Y., and F. Zhang, "Generalized
Labels for the Flexi-Grid in Lambda Switch Capable (LSC)
Label Switching Routers", RFC 7699, DOI 10.17487/RFC7699,
November 2015, <https://www.rfc-editor.org/info/rfc7699>.
[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>.
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[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>.
[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>.
[RFC8776] Saad, T., Gandhi, R., Liu, X., Beeram, V., and I. Bryskin,
"Common YANG Data Types for Traffic Engineering",
RFC 8776, DOI 10.17487/RFC8776, June 2020,
<https://www.rfc-editor.org/info/rfc8776>.
[RFC9093] Zheng, H., Lee, Y., Guo, A., Lopez, V., and D. King, "A
YANG Data Model for Layer 0 Types", RFC 9093,
DOI 10.17487/RFC9093, August 2021,
<https://www.rfc-editor.org/info/rfc9093>.
8.2. Informative References
[I-D.ietf-ccamp-flexigrid-tunnel-yang]
Mendez, J. E. L. D. V., Burrero, D. P., King, D., Lopez,
V., Busi, I., Dios, O. G. D., Lee, Y., and G. Galimberti,
"A YANG Data Model for Flexi-Grid Tunnels", Work in
Progress, Internet-Draft, draft-ietf-ccamp-flexigrid-
tunnel-yang-00, 9 November 2021,
<https://www.ietf.org/archive/id/draft-ietf-ccamp-
flexigrid-tunnel-yang-00.txt>.
[I-D.ietf-ccamp-wson-tunnel-model]
Lee, Y., Zheng, H., Guo, A., Lopez, V., King, D., Yoon, B.
Y., and R. Vilalta, "A Yang Data Model for WSON Tunnel",
Work in Progress, Internet-Draft, draft-ietf-ccamp-wson-
tunnel-model-06, 22 October 2021,
<https://www.ietf.org/archive/id/draft-ietf-ccamp-wson-
tunnel-model-06.txt>.
[I-D.ietf-teas-actn-poi-applicability]
Peruzzini, F., Bouquier, J., Busi, I., King, D., and D.
Ceccarelli, "Applicability of Abstraction and Control of
Traffic Engineered Networks (ACTN) to Packet Optical
Integration (POI)", Work in Progress, Internet-Draft,
draft-ietf-teas-actn-poi-applicability-06, 7 March 2022,
<https://www.ietf.org/archive/id/draft-ietf-teas-actn-poi-
applicability-06.txt>.
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[RFC7446] Lee, Y., Ed., Bernstein, G., Ed., Li, D., and W. Imajuku,
"Routing and Wavelength Assignment Information Model for
Wavelength Switched Optical Networks", RFC 7446,
DOI 10.17487/RFC7446, February 2015,
<https://www.rfc-editor.org/info/rfc7446>.
[RFC7581] Bernstein, G., Ed., Lee, Y., Ed., Li, D., Imajuku, W., and
J. Han, "Routing and Wavelength Assignment Information
Encoding for Wavelength Switched Optical Networks",
RFC 7581, DOI 10.17487/RFC7581, June 2015,
<https://www.rfc-editor.org/info/rfc7581>.
Acknowledgments
The authors of this document would like to thank the authors of
[I-D.ietf-teas-actn-poi-applicability] for having identified the gap
and requirements to trigger this work.
The authors of this document would also like to thank Young Lee,
Haomian Zheng, Victor Lopex, Ricard Vilalta, Bin Yeong Yoon, Jorge E.
Lopez de Vergara Mendez, Daniel Perdices Burrero, Oscar Gonzalez de
Dios, Gabriele Galimberti, Zafar Ali, Daniel Michaud Vallinoto and
Dhruv Dhody who have contributed to the development of path
computation augmentations for WSON and Flexi-grid topology in earlier
versions of [I-D.ietf-ccamp-wson-tunnel-model] and of
[I-D.ietf-ccamp-flexigrid-tunnel-yang].
This document was prepared using kramdown.
Contributors
Daniel King
Old Dog Consulting
Email: daniel@olddog.co.uk
Authors' Addresses
Italo Busi
Huawei Technologies
Email: italo.busi@huawei.com
Aihua Guo
Futurewei Technologies
Email: aihuaguo.ietf@gmail.com
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Sergio Belotti
Nokia
Email: sergio.belotti@nokia.com
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