]> Naudit HPCN

jorge.lopez_vergara@uam.es

Universidad Autonoma de Madrid

daniel.perdices@uam.es

Old Dog Consulting

daniel@olddog.co.uk

Nokia

victor.lopez@nokia.com

Huawei Technologies

Italo.Busi@huawei.com

Nokia

sergio.belotti@nokia.com

Cisco

ggalimbe@cisco.com

CCAMP Working Group Flexi-Grid This document defines a YANG model for managing flexi-grid optical tunnels (media-channels), complementing the information provided by the flexi-grid topology model. The YANG data model defined in this document conforms to the Network Management Datastore Architecture (NMDA).

Transport networks are evolving from current DWDM systems towards elastic optical networks, based on flexi-grid transmission and switching technologies . Such technology aims at increasing both transport network scalability and flexibility, allowing the optimization of bandwidth usage. While focuses on flexi-grid objects such as nodes, transponders and links, this document presents a YANG model for the flexi-grid tunnel (media-channel). This YANG module defines the whole path from a source transponder or node to the destination through a number of intermediate nodes in the flexi-grid network. This document identifies the flexi-grid tunne components, parameters and their values, characterizes the features and the performances of the flexi-grid elements. An application example is provided towards the end of the document to better understand their utility.

Refer to and for the key terms used in this document. The following terms are defined in and are not redefined here: client server augment data model data node The following terms are defined in and are not redefined here: configuration data state data The terminology for describing YANG data models is found in .

The present model defines a flexi-grid tunnel mainly composed of: source address source flexi-grid port source flexi-grid transponder destination address destination flexi-grid port destination flexi-grid transponder list of links that defines the path other optical attributes Each path can be a tunnel (only defined by source and destination node) or a network tunnel (additionally needs source and destination transponders). Therefore, all the attributes are optional to support both situations. This is achieved by a combination of the traffic engineering tunnel attributes explained in and augments when necessary. For instance, source address, source flexi-grid transponder, destination address and destination flexi-grid transponder attributes are directly taken from tunnel, whereas other attributes such as source flexi-grid port, destination flexi-grid port are defined, as they are specific for flexi-grid.

In order to explain how this model is used, the following example is provided. An optical network usually has multiple transponders, switches (nodes) and links. Figure 1 shows a simple topology, where two physical paths interconnect two optical transponders.

Flexi-grid Tunnel Group x <~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~> +------------+ +------------+ | Flexi- | | Flexi- | | grid | | grid | | node A | | node E | | | +------+ +------+ | | | | Link 1 |Flexi-| Link 2 |Flexi-| Link 3 | | | |<------>| grid |<------>| grid |<------>| | |......... | |node B| |node C| | .........| | Trans- : | +------+ +------+ | : Trans- | | ponder : | | : ponder | | A : | +----------+ | : E | |........: | Link 4 |Flexi-grid| Link 5 | :........| | | | D | | | | |<------------>| node |<------------>| | | | +----------+ | | +------------+ +------------+ <~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~> Flexi-grid Tunnel Group y ]]>

To configure a network tunnel to interconnect transponders A and E, first of all we have to populate the flexi-grid topology YANG model with all elements in the network: We define the transponders within nodes A and E as tunnel termination points (TTPs) and provide their internal local link connectivity towards the node interfaces. We also provide nodes A and B identifiers, addresses and interfaces. We do the same for the nodes B, C and D, providing their identifiers, addresses and interfaces, as well as the internal connectivity matrix between interfaces. Then, we also define the links 1 to 5 that interconnect nodes, indicating which flexi-grid labels are available. Other information, such as the slot frequency and granularity are also provided. After the nodes, links and transponders have been defined using we can configure the tunnel from the information we have stored in the flexi-grid topology, by querying which elements are available, and planning the resources that have to be provided on each situation. Note that every element in the flexi-grid topology has a reference, and this is the way in which they are called in the tunnel. Depending on the case, it is possible to define either the source and destination node ports, or the source and destination node and transponder. In our case, we would define a network tunnel, with source transponder A and source node B, and destination transponder E and destination node C. Thus, we are going to follow path x. Then, for each link in the path x, we indicate which channel we are going to use, providing information about the slots, and what nodes are connected. Finally, the flexi-grid topology has to be updated with each element usage status each time a tunnel is created or torn down.

file "ietf-flexi-grid-tunnel@2022-07-11.yang" module ietf-flexi-grid-tunnel { yang-version 1.1; namespace "urn:ietf:params:xml:ns:yang:ietf-flexi-grid-tunnel"; prefix "flexg-tnl"; import ietf-te { prefix "te"; revision-date "2022-07-11"; 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"; } import ietf-layer0-types-ext { prefix "l0-types-ext"; } organization "IETF CCAMP Working Group"; contact "WG Web: WG List: Editor: Jorge E. Lopez de Vergara Editor: Daniel Perdices Editor: Victor Lopez Editor: Young Lee "; description "This module defines a model for Flex-grid Tunnel Services. 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 "2022-07-11" { description "Initial Revision"; reference "RFC XXXX: YANG data model for Flexi-Grid tunnels"; // RFC Ed.: replace XXXX with actual RFC number, update date // information and remove this note } /* * Data nodes */ augment "/te:te/te:tunnels/te:tunnel" { description "Augment with additional parameters required for flexi-grid tunnels."; uses l0-types-ext:l0-tunnel-attributes; } /* * Augment TE label range information */ augment "/te:te/te:globals/te:named-path-constraints/" + "te:named-path-constraint/te:path-in-segment/" + "te:label-restrictions/te:label-restriction" { description "Augment TE label range information for the ingress segment of the named path constraint."; uses l0-types:flexi-grid-label-range-info; } augment "/te:te/te:globals/te:named-path-constraints/" + "te:named-path-constraint/te:path-out-segment/" + "te:label-restrictions/" + "te:label-restriction" { description "Augment TE label range information for the egress segment of the named path constraint."; uses l0-types:flexi-grid-label-range-info; } augment "/te:te/te:tunnels/te:tunnel/" + "te:primary-paths/te:primary-path/" + "te:path-in-segment/te:label-restrictions/" + "te:label-restriction" { description "Augment TE label range information for the ingress segment of the primay path."; uses l0-types:flexi-grid-label-range-info; } augment "/te:te/te:tunnels/te:tunnel/" + "te:primary-paths/te:primary-path/" + "te:path-out-segment/te:label-restrictions/" + "te:label-restriction" { description "Augment TE label range information for the egress segment of the primay path."; uses l0-types:flexi-grid-label-range-info; } augment "/te:te/te:tunnels/te:tunnel/" + "te:primary-paths/te:primary-path/" + "te:primary-reverse-path/" + "te:path-in-segment/te:label-restrictions/" + "te:label-restriction" { description "Augment TE label range information for the ingress segment of the primay reverse path."; uses l0-types:flexi-grid-label-range-info; } augment "/te:te/te:tunnels/te:tunnel/" + "te:primary-paths/te:primary-path/" + "te:primary-reverse-path/" + "te:path-out-segment/te:label-restrictions/" + "te:label-restriction" { description "Augment TE label range information for the egress segment of the primay reverse path."; uses l0-types:flexi-grid-label-range-info; } augment "/te:te/te:tunnels/te:tunnel/" + "te:secondary-paths/te:secondary-path/" + "te:path-in-segment/te:label-restrictions/" + "te:label-restriction" { description "Augment TE label range information for the ingress segment of the secondary path."; uses l0-types:flexi-grid-label-range-info; } augment "/te:te/te:tunnels/te:tunnel/" + "te:secondary-paths/te:secondary-path/" + "te:path-out-segment/te:label-restrictions/" + "te:label-restriction" { description "Augment TE label range information for the egress segment of the secondary path."; uses l0-types:flexi-grid-label-range-info; } augment "/te:te/te:tunnels/te:tunnel/" + "te:secondary-reverse-paths/te:secondary-reverse-path/" + "te:path-in-segment/te:label-restrictions/" + "te:label-restriction" { description "Augment TE label range information for the ingress segment of the secondary reverse path."; uses l0-types:flexi-grid-label-range-info; } augment "/te:te/te:tunnels/te:tunnel/" + "te:secondary-reverse-paths/te:secondary-reverse-path/" + "te:path-out-segment/te:label-restrictions/" + "te:label-restriction" { description "Augment TE label range information for the egress segment of the secondary reverse path."; uses l0-types:flexi-grid-label-range-info; } /* * Augment TE label. */ augment "/te:te/te:globals/te:named-path-constraints/" + "te:named-path-constraint/" + "te:explicit-route-objects-always/" + "te:route-object-exclude-always/te:type/te:label/" + "te:label-hop/te:te-label/te:technology" { description "Augment TE label hop for the explicit route objects always excluded by the path computation with the named path constraint."; case flexi-grid { uses l0-types:flexi-grid-label-hop; } } augment "/te:te/te:globals/te:named-path-constraints/" + "te:named-path-constraint/" + "te:explicit-route-objects-always/" + "te:route-object-include-exclude/te:type/te:label/" + "te:label-hop/te:te-label/te:technology" { description "Augment TE label hop for the explicit route objects included or excluded by the path computation with the named path constraint."; case flexi-grid { uses l0-types:flexi-grid-label-hop; } } augment "/te:te/te:globals/te:named-path-constraints/" + "te:named-path-constraint/te:path-in-segment/" + "te:label-restrictions/" + "te:label-restriction/te:label-start/" + "te:te-label/te:technology" { description "Augment TE label range start for the ingress segment of the named path constraint."; case flexi-grid { uses l0-types:flexi-grid-label-start-end; } } augment "/te:te/te:globals/te:named-path-constraints/" + "te:named-path-constraint/te:path-in-segment/" + "te:label-restrictions/" + "te:label-restriction/te:label-end/" + "te:te-label/te:technology" { description "Augment TE label range end for the ingress segment of the named path constraint."; case flexi-grid { uses l0-types:flexi-grid-label-start-end; } } augment "/te:te/te:globals/te:named-path-constraints/" + "te:named-path-constraint/te:path-in-segment/" + "te:label-restrictions/te:label-restriction/" + "te:label-step/te:technology" { description "Augment TE label range step for the ingress segment of the named path constraint."; case flexi-grid { uses l0-types:flexi-grid-label-step; } } augment "/te:te/te:globals/te:named-path-constraints/" + "te:named-path-constraint/te:path-out-segment/" + "te:label-restrictions/" + "te:label-restriction/te:label-start/" + "te:te-label/te:technology" { description "Augment TE label range start for the egress segment of the named path constraint."; case flexi-grid { uses l0-types:flexi-grid-label-start-end; } } augment "/te:te/te:globals/te:named-path-constraints/" + "te:named-path-constraint/te:path-out-segment/" + "te:label-restrictions/" + "te:label-restriction/te:label-end/" + "te:te-label/te:technology" { description "Augment TE label range end for the egress segment of the named path constraint."; case flexi-grid { uses l0-types:flexi-grid-label-start-end; } } augment "/te:te/te:globals/te:named-path-constraints/" + "te:named-path-constraint/te:path-out-segment/" + "te:label-restrictions/te:label-restriction/" + "te:label-step/te:technology" { description "Augment TE label range step for the egress segment of the named path constraint."; case flexi-grid { uses l0-types:flexi-grid-label-step; } } augment "/te:te/te:tunnels/te:tunnel/" + "te:primary-paths/te:primary-path/" + "te:optimizations/te:algorithm/te:metric/" + "te:optimization-metric/te:explicit-route-exclude-objects/" + "te:route-object-exclude-object/te:type/te:label/" + "te:label-hop/te:te-label/te:technology" { description "Augment TE label hop for the optimization of the explicit route objects excluded by the path computation of the primary path."; case flexi-grid { uses l0-types:flexi-grid-label-hop; } } augment "/te:te/te:tunnels/te:tunnel/" + "te:primary-paths/te:primary-path/" + "te:optimizations/te:algorithm/te:metric/" + "te:optimization-metric/te:explicit-route-include-objects/" + "te:route-object-include-object/te:type/te:label/" + "te:label-hop/te:te-label/te:technology" { description "Augment TE label hop for the optimization of the explicit route objects included by the path computation of the primary path."; case flexi-grid { uses l0-types:flexi-grid-label-hop; } } augment "/te:te/te:tunnels/te:tunnel/" + "te:primary-paths/te:primary-path/" + "te:explicit-route-objects-always/" + "te:route-object-exclude-always/te:type/te:label/" + "te:label-hop/te:te-label/te:technology" { description "Augment TE label hop for the explicit route objects always excluded by the path computation of the primary path."; case flexi-grid { uses l0-types:flexi-grid-label-hop; } } augment "/te:te/te:tunnels/te:tunnel/" + "te:primary-paths/te:primary-path/" + "te:explicit-route-objects-always/" + "te:route-object-include-exclude/te:type/te:label/" + "te:label-hop/te:te-label/te:technology" { description "Augment TE label hop for the explicit route objects included or excluded by the path computation of the primary path."; case flexi-grid { uses l0-types:flexi-grid-label-hop; } } augment "/te:te/te:tunnels/te:tunnel/" + "te:primary-paths/te:primary-path/" + "te:path-in-segment/te:label-restrictions/" + "te:label-restriction/te:label-start/" + "te:te-label/te:technology" { description "Augment TE label range start for the ingress segment of the primay path."; case flexi-grid { uses l0-types:flexi-grid-label-start-end; } } augment "/te:te/te:tunnels/te:tunnel/" + "te:primary-paths/te:primary-path/" + "te:path-in-segment/te:label-restrictions/" + "te:label-restriction/te:label-end/" + "te:te-label/te:technology" { description "Augment TE label range end for the ingress segment of the primay path."; case flexi-grid { uses l0-types:flexi-grid-label-start-end; } } augment "/te:te/te:tunnels/te:tunnel/" + "te:primary-paths/te:primary-path/" + "te:path-in-segment/te:label-restrictions/" + "te:label-restriction/te:label-step/te:technology" { description "Augment TE label range step for the ingress segment of the primay path."; case flexi-grid { uses l0-types:flexi-grid-label-step; } } augment "/te:te/te:tunnels/te:tunnel/" + "te:primary-paths/te:primary-path/" + "te:path-out-segment/te:label-restrictions/" + "te:label-restriction/te:label-start/" + "te:te-label/te:technology" { description "Augment TE label range start for the egress segment of the primay path."; case flexi-grid { uses l0-types:flexi-grid-label-start-end; } } augment "/te:te/te:tunnels/te:tunnel/" + "te:primary-paths/te:primary-path/" + "te:path-out-segment/te:label-restrictions/" + "te:label-restriction/te:label-end/" + "te:te-label/te:technology" { description "Augment TE label range end for the egress segment of the primay path."; case flexi-grid { uses l0-types:flexi-grid-label-start-end; } } augment "/te:te/te:tunnels/te:tunnel/" + "te:primary-paths/te:primary-path/" + "te:path-out-segment/te:label-restrictions/" + "te:label-restriction/te:label-step/te:technology" { description "Augment TE label range end for the egress segment of the primay path."; case flexi-grid { uses l0-types:flexi-grid-label-step; } } augment "/te:te/te:tunnels/te:tunnel/" + "te:primary-paths/te:primary-path/" + "te:computed-paths-properties/" + "te:computed-path-properties/te:path-properties/" + "te:path-route-objects/te:path-route-object/" + "te:type/te:label/" + "te:label-hop/te:te-label/te:technology" { description "Augment TE label hop for the route object of the computed primary path."; case flexi-grid { uses l0-types:flexi-grid-label-hop; } } augment "/te:te/te:tunnels/te:tunnel/" + "te:primary-paths/te:primary-path/" + "te:primary-reverse-path/" + "te:optimizations/te:algorithm/te:metric/" + "te:optimization-metric/te:explicit-route-exclude-objects/" + "te:route-object-exclude-object/te:type/te:label/" + "te:label-hop/te:te-label/te:technology" { description "Augment TE label hop for the optimization of the explicit route objects excluded by the path computation of the primary reverse path."; case flexi-grid { uses l0-types:flexi-grid-label-hop; } } augment "/te:te/te:tunnels/te:tunnel/" + "te:primary-paths/te:primary-path/" + "te:primary-reverse-path/" + "te:optimizations/te:algorithm/te:metric/" + "te:optimization-metric/te:explicit-route-include-objects/" + "te:route-object-include-object/te:type/te:label/" + "te:label-hop/te:te-label/te:technology" { description "Augment TE label hop for the optimization of the explicit route objects included by the path computation of the primary reverse path."; case flexi-grid { uses l0-types:flexi-grid-label-hop; } } augment "/te:te/te:tunnels/te:tunnel/" + "te:primary-paths/te:primary-path/" + "te:primary-reverse-path/" + "te:explicit-route-objects-always/" + "te:route-object-exclude-always/" + "te:type/te:label/" + "te:label-hop/te:te-label/te:technology" { description "Augment TE label hop for the explicit route objects always excluded by the path computation of the primary reverse path."; case flexi-grid { uses l0-types:flexi-grid-label-hop; } } augment "/te:te/te:tunnels/te:tunnel/" + "te:primary-paths/te:primary-path/" + "te:primary-reverse-path/" + "te:explicit-route-objects-always/" + "te:route-object-include-exclude/" + "te:type/te:label/" + "te:label-hop/te:te-label/te:technology" { description "Augment TE label hop for the explicit route objects included or excluded by the path computation of the primary reverse path."; case flexi-grid { uses l0-types:flexi-grid-label-hop; } } augment "/te:te/te:tunnels/te:tunnel/" + "te:primary-paths/te:primary-path/" + "te:primary-reverse-path/" + "te:path-in-segment/te:label-restrictions/" + "te:label-restriction/te:label-start/" + "te:te-label/te:technology" { description "Augment TE label range start for the ingress segment of the primay reverse path."; case flexi-grid { uses l0-types:flexi-grid-label-start-end; } } augment "/te:te/te:tunnels/te:tunnel/" + "te:primary-paths/te:primary-path/" + "te:primary-reverse-path/" + "te:path-in-segment/te:label-restrictions/" + "te:label-restriction/te:label-end/" + "te:te-label/te:technology" { description "Augment TE label range end for the ingress segment of the primay reverse path."; case flexi-grid { uses l0-types:flexi-grid-label-start-end; } } augment "/te:te/te:tunnels/te:tunnel/" + "te:primary-paths/te:primary-path/" + "te:primary-reverse-path/" + "te:path-in-segment/te:label-restrictions/" + "te:label-restriction/te:label-step/te:technology" { description "Augment TE label range step for the ingress segment of the primay reverse path."; case flexi-grid { uses l0-types:flexi-grid-label-step; } } augment "/te:te/te:tunnels/te:tunnel/" + "te:primary-paths/te:primary-path/" + "te:primary-reverse-path/" + "te:path-out-segment/te:label-restrictions/" + "te:label-restriction/te:label-start/" + "te:te-label/te:technology" { description "Augment TE label range start for the egress segment of the primay reverse path."; case flexi-grid { uses l0-types:flexi-grid-label-start-end; } } augment "/te:te/te:tunnels/te:tunnel/" + "te:primary-paths/te:primary-path/" + "te:primary-reverse-path/" + "te:path-out-segment/te:label-restrictions/" + "te:label-restriction/te:label-end/" + "te:te-label/te:technology" { description "Augment TE label range end for the egress segment of the primay reverse path."; case flexi-grid { uses l0-types:flexi-grid-label-start-end; } } augment "/te:te/te:tunnels/te:tunnel/" + "te:primary-paths/te:primary-path/" + "te:primary-reverse-path/" + "te:path-out-segment/te:label-restrictions/" + "te:label-restriction/te:label-step/te:technology" { description "Augment TE label range step for the egress segment of the primay reverse path."; case flexi-grid { uses l0-types:flexi-grid-label-step; } } augment "/te:te/te:tunnels/te:tunnel/" + "te:primary-paths/te:primary-path/" + "te:primary-reverse-path/" + "te:computed-paths-properties/te:computed-path-properties/" + "te:path-properties/te:path-route-objects/" + "te:path-route-object/te:type/te:label/" + "te:label-hop/te:te-label/te:technology" { description "Augment TE label hop for the route object of the computed primary reverse path."; case flexi-grid { uses l0-types:flexi-grid-label-hop; } } augment "/te:te/te:tunnels/te:tunnel/" + "te:secondary-paths/te:secondary-path/" + "te:optimizations/te:algorithm/te:metric/" + "te:optimization-metric/te:explicit-route-exclude-objects/" + "te:route-object-exclude-object/te:type/te:label/" + "te:label-hop/te:te-label/te:technology" { description "Augment TE label hop for the optimization of the explicit route objects excluded by the path computation of the secondary path."; case flexi-grid { uses l0-types:flexi-grid-label-hop; } } augment "/te:te/te:tunnels/te:tunnel/" + "te:secondary-paths/te:secondary-path/" + "te:optimizations/te:algorithm/te:metric/" + "te:optimization-metric/te:explicit-route-include-objects/" + "te:route-object-include-object/te:type/te:label/" + "te:label-hop/te:te-label/te:technology" { description "Augment TE label hop for the optimization of the explicit route objects included by the path computation of the secondary path."; case flexi-grid { uses l0-types:flexi-grid-label-hop; } } augment "/te:te/te:tunnels/te:tunnel/" + "te:secondary-paths/te:secondary-path/" + "te:explicit-route-objects-always/" + "te:route-object-exclude-always/te:type/te:label/" + "te:label-hop/te:te-label/te:technology" { description "Augment TE label hop for the explicit route objects always excluded by the path computation of the secondary path."; case flexi-grid { uses l0-types:flexi-grid-label-hop; } } augment "/te:te/te:tunnels/te:tunnel/" + "te:secondary-paths/te:secondary-path/" + "te:explicit-route-objects-always/" + "te:route-object-include-exclude/te:type/te:label/" + "te:label-hop/te:te-label/te:technology" { description "Augment TE label hop for the explicit route objects included or excluded by the path computation of the secondary path."; case flexi-grid { uses l0-types:flexi-grid-label-hop; } } augment "/te:te/te:tunnels/te:tunnel/" + "te:secondary-paths/te:secondary-path/" + "te:path-in-segment/te:label-restrictions/" + "te:label-restriction/te:label-start/" + "te:te-label/te:technology" { description "Augment TE label range start for the ingress segment of the secondary path."; case flexi-grid { uses l0-types:flexi-grid-label-start-end; } } augment "/te:te/te:tunnels/te:tunnel/" + "te:secondary-paths/te:secondary-path/" + "te:path-in-segment/te:label-restrictions/" + "te:label-restriction/te:label-end/" + "te:te-label/te:technology" { description "Augment TE label range end for the ingress segment of the secondary path."; case flexi-grid { uses l0-types:flexi-grid-label-start-end; } } augment "/te:te/te:tunnels/te:tunnel/" + "te:secondary-paths/te:secondary-path/" + "te:path-in-segment/te:label-restrictions/" + "te:label-restriction/te:label-step/te:technology" { description "Augment TE label range step for the ingress segment of the secondary path."; case flexi-grid { uses l0-types:flexi-grid-label-step; } } augment "/te:te/te:tunnels/te:tunnel/" + "te:secondary-paths/te:secondary-path/" + "te:path-out-segment/te:label-restrictions/" + "te:label-restriction/te:label-start/" + "te:te-label/te:technology" { description "Augment TE label range start for the egress segment of the secondary path."; case flexi-grid { uses l0-types:flexi-grid-label-start-end; } } augment "/te:te/te:tunnels/te:tunnel/" + "te:secondary-paths/te:secondary-path/" + "te:path-out-segment/te:label-restrictions/" + "te:label-restriction/te:label-end/" + "te:te-label/te:technology" { description "Augment TE label range end for the egress segment of the secondary path."; case flexi-grid { uses l0-types:flexi-grid-label-start-end; } } augment "/te:te/te:tunnels/te:tunnel/" + "te:secondary-paths/te:secondary-path/" + "te:path-out-segment/te:label-restrictions/" + "te:label-restriction/te:label-step/te:technology" { description "Augment TE label range step for the egress segment of the secondary path."; case flexi-grid { uses l0-types:flexi-grid-label-step; } } augment "/te:te/te:tunnels/te:tunnel/" + "te:secondary-paths/te:secondary-path/" + "te:computed-paths-properties/" + "te:computed-path-properties/" + "te:path-properties/te:path-route-objects/" + "te:path-route-object/te:type/te:label/" + "te:label-hop/te:te-label/te:technology" { description "Augment TE label hop for the route object of the computed secondary path."; case flexi-grid { uses l0-types:flexi-grid-label-hop; } } augment "/te:te/te:tunnels/te:tunnel/" + "te:secondary-reverse-paths/te:secondary-reverse-path/" + "te:optimizations/te:algorithm/te:metric/" + "te:optimization-metric/te:explicit-route-exclude-objects/" + "te:route-object-exclude-object/te:type/te:label/" + "te:label-hop/te:te-label/te:technology" { description "Augment TE label hop for the optimization of the explicit route objects excluded by the path computation of the secondary reverse path."; case flexi-grid { uses l0-types:flexi-grid-label-hop; } } augment "/te:te/te:tunnels/te:tunnel/" + "te:secondary-reverse-paths/te:secondary-reverse-path/" + "te:optimizations/te:algorithm/te:metric/" + "te:optimization-metric/te:explicit-route-include-objects/" + "te:route-object-include-object/te:type/te:label/" + "te:label-hop/te:te-label/te:technology" { description "Augment TE label hop for the optimization of the explicit route objects included by the path computation of the secondary reverse path."; case flexi-grid { uses l0-types:flexi-grid-label-hop; } } augment "/te:te/te:tunnels/te:tunnel/" + "te:secondary-reverse-paths/te:secondary-reverse-path/" + "te:explicit-route-objects-always/" + "te:route-object-exclude-always/te:type/te:label/" + "te:label-hop/te:te-label/te:technology" { description "Augment TE label hop for the explicit route objects always excluded by the path computation of the secondary reverse path."; case flexi-grid { uses l0-types:flexi-grid-label-hop; } } augment "/te:te/te:tunnels/te:tunnel/" + "te:secondary-reverse-paths/te:secondary-reverse-path/" + "te:explicit-route-objects-always/" + "te:route-object-include-exclude/te:type/te:label/" + "te:label-hop/te:te-label/te:technology" { description "Augment TE label hop for the explicit route objects included or excluded by the path computation of the secondary reverse path."; case flexi-grid { uses l0-types:flexi-grid-label-hop; } } augment "/te:te/te:tunnels/te:tunnel/" + "te:secondary-reverse-paths/te:secondary-reverse-path/" + "te:path-in-segment/te:label-restrictions/" + "te:label-restriction/te:label-start/" + "te:te-label/te:technology" { description "Augment TE label range start for the ingress segment of the secondary reverse path."; case flexi-grid { uses l0-types:flexi-grid-label-start-end; } } augment "/te:te/te:tunnels/te:tunnel/" + "te:secondary-reverse-paths/te:secondary-reverse-path/" + "te:path-in-segment/te:label-restrictions/" + "te:label-restriction/te:label-end/" + "te:te-label/te:technology" { description "Augment TE label range end for the ingress segment of the secondary reverse path."; case flexi-grid { uses l0-types:flexi-grid-label-start-end; } } augment "/te:te/te:tunnels/te:tunnel/" + "te:secondary-reverse-paths/te:secondary-reverse-path/" + "te:path-in-segment/te:label-restrictions/" + "te:label-restriction/te:label-step/te:technology" { description "Augment TE label range step for the ingress segment of the secondary reverse path."; case flexi-grid { uses l0-types:flexi-grid-label-step; } } augment "/te:te/te:tunnels/te:tunnel/" + "te:secondary-reverse-paths/te:secondary-reverse-path/" + "te:path-out-segment/te:label-restrictions/" + "te:label-restriction/te:label-start/" + "te:te-label/te:technology" { description "Augment TE label range start for the egress segment of the secondary reverse path."; case flexi-grid { uses l0-types:flexi-grid-label-start-end; } } augment "/te:te/te:tunnels/te:tunnel/" + "te:secondary-reverse-paths/te:secondary-reverse-path/" + "te:path-out-segment/te:label-restrictions/" + "te:label-restriction/te:label-end/" + "te:te-label/te:technology" { description "Augment TE label range end for the egress segment of the secondary reverse path."; case flexi-grid { uses l0-types:flexi-grid-label-start-end; } } augment "/te:te/te:tunnels/te:tunnel/" + "te:secondary-reverse-paths/te:secondary-reverse-path/" + "te:path-out-segment/te:label-restrictions/" + "te:label-restriction/te:label-step/te:technology" { description "Augment TE label range step for the egress segment of the secondary reverse path."; case flexi-grid { uses l0-types:flexi-grid-label-step; } } augment "/te:te/te:tunnels/te:tunnel/" + "te:secondary-reverse-paths/te:secondary-reverse-path/" + "te:computed-paths-properties/" + "te:computed-path-properties/" + "te:path-properties/te:path-route-objects/" + "te:path-route-object/te:type/te:label/" + "te:label-hop/te:te-label/te:technology" { description "Augment TE label hop for the route object of the computed secondary reverse path."; case flexi-grid { uses l0-types:flexi-grid-label-hop; } } augment "/te:te/te:lsps/" + "te:lsp/te:lsp-record-route-information/" + "te:lsp-record-route-information/te:type/te:label/" + "te:label-hop/te:te-label/te:technology" { description "Augment TE label hop for the record route of the LSP."; case flexi-grid { uses l0-types:flexi-grid-label-hop; } } } ]]>

The configuration, state, and action data defined in this document are designed to be accessed via a management protocol with a secure transport layer, such as NETCONF or RESTCONF . The NETCONF access control model provides the means to restrict access for particular NETCONF users to a preconfigured subset of all available NETCONF protocol operations and content. There are a number of data nodes defined in this YANG module that are writable/creatable/deletable (i.e., config true, which is the default). These data nodes may be considered sensitive or vulnerable in some network environments. Write operations (e.g., edit-config) to these data nodes without proper protection can have a negative effect on network operations. These are the subtrees and data nodes and their sensitivity/vulnerability: /te:te/te:tunnels/te:tunnel /te:te/.../te:te-bandwidth/te:technology /te:te/.../te:type/te:label/te:label-hop/te:te-label/te:technology /te:te/.../te:label-restrictions/te:label-restriction/te:label-start/te:te-label/te:technology /te:te/.../te:label-restrictions/te:label-restriction/te:label-end/te:te-label/te:technology /te:te/.../te:label-restrictions/te:label-restriction/ Editors note: we are using simplified description by folding similar branches to avoid repetition.

To be discussed.

This work was developed by several additional people, who due to frontpage author restrictions, are listed below: Zafar Ali Cisco Email: zali@cisco.com Daniel Michaud Vallinoto Universidad Autonoma de Madrid Email: daniel.michaud@estudiante.uam.es Young Lee Samsung Email: younglee.tx@gmail.com Oscar Gonzalez de Dios Telefonica I+D/GCTO Email: oscar.gonzalezdedios@telefonica.com

This work is also partially funded by the Spanish State Research Agency under the project AgileMon (AEI PID2019-104451RB-C21) and by the Spanish Ministry of Science, Innovation and Universities under the program for the training of university lecturers (Grant number: FPU19/05678).

&RFC6241; &RFC7699; &RFC7950; &RFC8341; &RFC8040; &RFC7446; &RFC7698;