Network Working Group X. Liu Internet-Draft Alef Edge Intended status: Standards Track I. Bryskin Expires: January 8, 2025 Individual V. Beeram Juniper Networks T. Saad Cisco Systems Inc H. Shah Ciena O. Gonzalez de Dios Telefonica July 7, 2024 YANG Data Model for Layer 3 TE Topologies draft-ietf-teas-yang-l3-te-topo-18 Abstract This document defines a YANG data model for layer 3 traffic engineering topologies. Status of This Memo This Internet-Draft is submitted in full conformance with the provisions of BCP 78 and BCP 79. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF). Note that other groups may also distribute working documents as Internet-Drafts. The list of current Internet- Drafts is at https://datatracker.ietf.org/drafts/current/. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress." This Internet-Draft will expire on January 8, 2025. Copyright Notice Copyright (c) 2024 IETF Trust and the persons identified as the document authors. All rights reserved. This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (https://trustee.ietf.org/license-info) in effect on the date of Liu, et al. Expires January 8, 2025 [Page 1] Internet-Draft YANG L3 TE Topology July 2024 publication of this document. Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must include Simplified BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License. Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3 1.1. Terminology . . . . . . . . . . . . . . . . . . . . . . . 3 1.2. Tree Diagrams . . . . . . . . . . . . . . . . . . . . . . 4 1.3. Prefixes in Data Node Names . . . . . . . . . . . . . . . 4 2. Modeling Considerations for L3 TE Topologies . . . . . . . . 4 2.1. Relationship Between Layer 3 Unicast Topology and TE topology . . . . . . . . . . . . . . . . . . . . . . . . 6 2.2. Relationship Modeling . . . . . . . . . . . . . . . . . . 7 2.2.1. Topology Referencing . . . . . . . . . . . . . . . . 7 2.2.2. Node Referencing . . . . . . . . . . . . . . . . . . 8 2.2.3. Link Termination Point Referencing . . . . . . . . . 9 2.2.4. Link Referencing . . . . . . . . . . . . . . . . . . 9 2.3. Topology Type Modeling . . . . . . . . . . . . . . . . . 9 3. Packet Switching Technology Extensions to TE Topologies . . . 9 3.1. Technology Specific Link Attributes . . . . . . . . . . . 10 3.2. Performance Metric . . . . . . . . . . . . . . . . . . . 10 4. Complete Model Tree Structure . . . . . . . . . . . . . . . . 11 4.1. Layer 3 TE Topology Module . . . . . . . . . . . . . . . 11 4.2. Packet Switching TE Topology Module . . . . . . . . . . . 12 4.2.1. Network Types . . . . . . . . . . . . . . . . . . . . 12 4.2.2. Augmentation Groupings . . . . . . . . . . . . . . . 12 4.2.3. Node Connectivity Matrix Attributes . . . . . . . . . 15 4.2.4. Node Information Source . . . . . . . . . . . . . . . 16 4.2.5. Node Local Link Connectivity . . . . . . . . . . . . 16 4.2.6. Link Template for Performance Metrics . . . . . . . . 17 4.2.7. Link for Performance Metrics . . . . . . . . . . . . 17 4.2.8. Link Information Source for Performance Metrics . . . 18 4.2.9. Link Template for Packet-specific Attributes . . . . 18 4.2.10. Link for Packet-specific Attributes . . . . . . . . . 18 4.2.11. Link Information Source for Packet-specific Attributes . . . . . . . . . . . . . . . . . . . . . 19 4.2.12. TE Bandwidth for Packet-specific Technologies . . . . 19 5. YANG Modules . . . . . . . . . . . . . . . . . . . . . . . . 22 5.1. Layer 3 TE Topology Module . . . . . . . . . . . . . . . 22 5.2. Packet Switching TE Topology Module . . . . . . . . . . . 27 6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 42 7. Security Considerations . . . . . . . . . . . . . . . . . . . 43 8. References . . . . . . . . . . . . . . . . . . . . . . . . . 46 8.1. Normative References . . . . . . . . . . . . . . . . . . 46 Liu, et al. Expires January 8, 2025 [Page 2] Internet-Draft YANG L3 TE Topology July 2024 8.2. Informative References . . . . . . . . . . . . . . . . . 48 Appendix A. Companion YANG Model for Non-NMDA Compliant Implementations . . . . . . . . . . . . . . . . . . 50 A.1. Layer 3 TE Topology State Module . . . . . . . . . . . . 50 A.2. Packet Switching TE Topology State Module . . . . . . . . 53 Appendix B. Data Tree Example . . . . . . . . . . . . . . . . . 67 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 78 1. Introduction This document defines a YANG [RFC7950] data model for describing the relationship between a layer 3 unicast topology [RFC8346] and a Traffic Engineering (TE) topology [RFC8795]. When traffic engineering is enabled on a layer 3 unicast topology, there will be a corresponding TE topology. The TE topology may or may not be congruent with the layer 3 unicast topology. When such a congruent TE topology exists, there will be a one-to-one association between the one modeling element in the layer 3 unicast topology and another element in the TE topology. When such a congruent TE topology does not exist, the association will not be one-to-one. This YANG data model supports both cases. This document defines a data model to manage and control layer 3 topologies with the TE capability, without describing specific technologies to achieve the TE capability. There are other related YANG data models defined for specific technologies. For example, a YANG data model for SR (Segment Routing) and SR TE topologies is defined in [I-D.ietf-teas-yang-sr-te-topo]. A YANG data model for MPLS-TE topology is defined in [I-D.ietf-teas-yang-te-mpls-topology]. 1.1. Terminology The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in BCP 14, [RFC2119] [RFC8174] when, and only when, they appear in all capitals, as shown here. The following terms are defined in [RFC7950] and are not redefined here: o augment o data model o data node Liu, et al. Expires January 8, 2025 [Page 3] Internet-Draft YANG L3 TE Topology July 2024 1.2. Tree Diagrams Tree diagrams used in this document follow the notation defined in [RFC8340]. 1.3. Prefixes in Data Node Names In this document, names of data nodes, actions, and other data model objects are often used without a prefix, as long as it is clear from the context in which YANG module each name is defined. Otherwise, names are prefixed using the standard prefix associated with the corresponding YANG module, as shown in Table 1. +--------------+-----------------------+----------------------------+ | Prefix | YANG module | Reference | +--------------+-----------------------+----------------------------+ | l3t | ietf-l3-unicast- | [RFC8346] | | | topology | | | nw | ietf-network | [RFC8345] | | nt | ietf-network-topology | [RFC8345] | | rt-types | ietf-routing-types | [RFC8294] | | te-packet- | ietf-te-packet-types | [I-D.ietf-teas-rfc8776-upd | | types | | ate] | | te-types | ietf-te-types | [I-D.ietf-teas-rfc8776-upd | | | | ate] | | tet | ietf-te-topology | [RFC8795] | +--------------+-----------------------+----------------------------+ Table 1: Prefixes and Corresponding YANG Modules 2. Modeling Considerations for L3 TE Topologies A layer 3 TE topology is a layer 3 unicast topology with additional TE capabilities enabled. [RFC8346] defines a YANG data model for layer 3 unicast topologies, consisting of two modules: ietf-l3- unicast-topology and ietf-l3-unicast-topology-state. The YANG data model defined in this document augments the YANG data model defined in [RFC8346]. This document specifies two YANG modules ietf-l3-te- topology and ietf-l3-te-topology-state, augmenting ietf-l3-unicast- topology and ietf-l3-unicast-topology-state respectively, to add additional TE capabilities. Such an augmentation relationship is shown in Figure 1 below. Liu, et al. Expires January 8, 2025 [Page 4] Internet-Draft YANG L3 TE Topology July 2024 +-------------------------+ | Network Topology | | ietf-network-topology | Defined in RFC 8345 +------------^------------+ | | augments | (An "inheritance" relation) | +-------------^-------------+ | Layer 3 Unicast Topology | | ietf-l3-unicast-topology | Defined in RFC 8346 +-------------^-------------+ | | augments | (An "inheritance" relation) | +------------^------------+ | Layer 3 TE Topology | | ietf-l3-te-topology | Defined in this document +-------------------------+ Figure 1: L3 TE Model Augmentation Additionally, this document specifies two more YANG modules ietf-te- topology-packet and ietf-te-topology-packet-state, augmenting ietf- te-topology and ietf-te-topology-state respectively, to add additional attributes for TE packet data networks, as shown in Figure 2. Section 3 of this document describes these additional attributes in further details. Liu, et al. Expires January 8, 2025 [Page 5] Internet-Draft YANG L3 TE Topology July 2024 +-------------------------+ | Network Topology | | ietf-network-topology | Defined in RFC 8345 +------------^------------+ | | augments | (An "inheritance" relation) | +------------^------------+ | TE Topology | | ietf-te-topology | Defined in RFC 8795 +------------^------------+ | | augments | (An "inheritance" relation) | +------------^------------+ | TE Packet Topology | | ietf-te-topology-packet | Defined in this document +-------------------------+ Figure 2: TE Packet Model Augmentation 2.1. Relationship Between Layer 3 Unicast Topology and TE topology In general, the layer 3 unicast topology model specified in [RFC8346] and the TE topology model specified in [RFC8795] can be used independently. This document provides a method to use both together. When traffic engineering is enabled on a layer 3 unicast topology, there will be a resulting layer 3 TE topology, which is modeled by the YANG modules defined in this document. A layer 3 TE topology augments a layer 3 unicast topology, so it inherits all the objects and properties of the base layer 3 unicast topology. In addition, in such a layer 3 TE topology, the objects that are inherited from the base layer 3 unicast topology to this layer 3 TE topology may be associated with the objects in one corresponding TE topology. Such associations are supported by the module ietf-l3-te-topology defined in this document. Liu, et al. Expires January 8, 2025 [Page 6] Internet-Draft YANG L3 TE Topology July 2024 +----------------------------+ +----------------------+ | Layer 3 Topology | | TE Topology | | ietf-l3-unicast-topology | | ietf-te-topology | +--------------^-------------+ +----------------------+ | A | augments | | / | / references by "leafref" +------------^-----------+ / (An "association" relation) | Layer 3 TE Topology |__/ | ietf-l3-te-topology | +------------------------+ Figure 3: Model References The properties of the relations between the objects in a layer 3 TE topology and the objects in the corresponding TE topology are: o The associations are between objects of the same class, i.e. node to node or link to link. o The multiplicity of such an association is: 0..1 to 0..1. An object in a layer 3 TE topology modeled by ietf-l3-te-topology may be associated with zero or one object in the corresponding TE topology. The module ietf-l3-te-topology defined in this document requires both ietf-l3-unicast-topology defined in [RFC8346] and ietf-te-topology defined in [RFC8795]. 2.2. Relationship Modeling YANG data type leafref is used to model the association relationship between a layer 3 TE topology and a TE topology. YANG "must" statements are used to enforce that the referenced objects are in a topology of the proper type. 2.2.1. Topology Referencing When TE is enabled on a layer 3 unicast topology, if the TE topology is not congruent with the layer 3 unicast topology, the layer 3 TE topology will have a reference to the corresponding TE topology. Such a reference is modeled as follows: augment /nw:networks/nw:network/l3t:l3-topology-attributes: +--rw l3-te-topology-attributes +--rw network-ref? -> /nw:networks/network/network-id Liu, et al. Expires January 8, 2025 [Page 7] Internet-Draft YANG L3 TE Topology July 2024 The above network-ref is a YANG data node of type leafref, used to indicate the network-id of the corresponding TE topology. The leafref relationship is illustrated by the simplified data instances in the following diagram. +-------------------------------+ +--------------------------+ | ietf-l3-te-topology: | | ietf-te-topology: | |+-----------------------------+| |+------------------------+| || ietf-l3-unicast-topology: || || ietf-network-topology: || ||+---------------------------+|| +-->|| network-id (key) || ||| ietf-network-topology: ||| | || network-types: { || ||| network-id (key) ||| | || te-topology || ||| network-types: { ||| | || } || ||| l3-unicast-topology: {||| | || || ||| l3-te ||| | |+------------------------+| ||| } ||| | | | ||| } ||| | +--------------------------+ ||| ||| | ||+---------------------------+|| | || || | |+-----------------------------+| | | network-ref |--+ +-------------------------------+ Figure 4: Topology Referencing network-id defined in in [RFC8345] uniquely identifies a network topology instance of any type. As shown in the above diagram, the value of network-ref in the ietf-l3-te-topology instance matches the value of network-id in the ietf-te-topology instance. To ensure that the topology instance identified by this network-id is of type "te- topology", a "must" statement is defined in module ietf-l3-te- topology. Such "must" statements are also used in all the following leafref nodes in this section. If the TE topology is congruent with the layer 3 unicast topology, the above reference can still be used to specify TE parameters defined in the TE topology model. 2.2.2. Node Referencing When TE is enabled on a layer 3 unicast topology, if the TE topology is not congruent with the layer 3 unicast topology, a node in the layer 3 TE topology may have a reference to the corresponding node in the TE Topology. Such a reference is modeled as follows: Liu, et al. Expires January 8, 2025 [Page 8] Internet-Draft YANG L3 TE Topology July 2024 augment /nw:networks/nw:network/nw:node/l3t:l3-node-attributes: +--rw l3-te-node-attributes +--rw node-ref? leafref +--rw network-ref? -> /nw:networks/network/network-id 2.2.3. Link Termination Point Referencing When TE is enabled on a layer 3 unicast topology, if the TE topology is not congruent with the layer 3 unicast topology, a link termination point in the layer 3 TE topology may have a reference to the corresponding link termination point in the TE Topology. Such a reference is modeled as follows: augment /nw:networks/nw:network/nw:node/nt:termination-point /l3t:l3-termination-point-attributes: +--rw l3-te-tp-attributes +--rw tp-ref? leafref +--rw node-ref? leafref +--rw network-ref? -> /nw:networks/network/network-id 2.2.4. Link Referencing When TE is enabled on a layer 3 unicast topology, if the TE topology is not congruent with the layer 3 unicast topology, a link in the layer 3 topology may have a reference to the corresponding link in the TE Topology. Such a reference is modeled as follows: augment /nw:networks/nw:network/nt:link/l3t:l3-link-attributes: +--rw l3-te-link-attributes +--rw link-ref? leafref +--rw network-ref? -> /nw:networks/network/network-id 2.3. Topology Type Modeling A new topology type is defined in this document, to indicate a topology that is a layer 3 TE topology, which both inherits l3 unicast topology properties and is capable of TE. augment /nw:networks/nw:network/nw:network-types /l3t:l3-unicast-topology: +--rw l3-te! 3. Packet Switching Technology Extensions to TE Topologies The technology agnostic TE Topology model is defined in [RFC8795], which is extended by this document to cover the Packet Switch Capable (PSC) technology [RFC3471] [RFC7074]. Liu, et al. Expires January 8, 2025 [Page 9] Internet-Draft YANG L3 TE Topology July 2024 3.1. Technology Specific Link Attributes The technology agnostic TE Topology model is augmented with packet switching specific link attributes: augment /nw:networks/tet:te/tet:templates/tet:link-template /tet:te-link-attributes /tet:interface-switching-capability: +--rw packet-switch-capable +--rw minimum-lsp-bandwidth? rt-types:bandwidth-ieee-float32 +--rw interface-mtu? uint16 augment /nw:networks/nw:network/nt:link/tet:te /tet:te-link-attributes /tet:interface-switching-capability: +--rw packet-switch-capable +--rw minimum-lsp-bandwidth? rt-types:bandwidth-ieee-float32 +--rw interface-mtu? uint16 augment /nw:networks/nw:network/nt:link/tet:te /tet:information-source-entry /tet:interface-switching-capability: +--ro packet-switch-capable +--ro minimum-lsp-bandwidth? rt-types:bandwidth-ieee-float32 +--ro interface-mtu? uint16 3.2. Performance Metric [RFC7471], [RFC8570] and [RFC7823] specify TE performance metric parameters and their usage. The packet switching augmentations specified in this document support such a capability, which can be conditional enabled by a YANG feature "te-performance-metric". augment /nw:networks/nw:network/nw:node/tet:te /tet:te-node-attributes/tet:connectivity-matrices: +--rw performance-metric +--rw measurement | ...... +--rw normality | ...... +--rw throttle ...... Such an augmentation has been applied to: o Connectivity matrices container o Connectivity matrix entry o Local link connectivities container Liu, et al. Expires January 8, 2025 [Page 10] Internet-Draft YANG L3 TE Topology July 2024 o Local link connectivity entry o TE link attributes container in a TE link template o TE link attributes container in a TE link o Information source entry in a TE link These performance metric parameters defined in this document are for the purpose of traffic engineering. They can be used to make traffic engineering decisions. The usage is different and compliment to other performance monitoring machinimas such as the VPN service performance monitoring defined in [RFC9375]. 4. Complete Model Tree Structure 4.1. Layer 3 TE Topology Module The model tree structure of the layer 3 TE topology module is as shown below: module: ietf-l3-te-topology augment /nw:networks/nw:network/nw:network-types /l3t:l3-unicast-topology: +--rw l3-te! augment /nw:networks/nw:network/l3t:l3-topology-attributes: +--rw l3-te-topology-attributes +--rw network-ref? -> /nw:networks/network/network-id augment /nw:networks/nw:network/nw:node/l3t:l3-node-attributes: +--rw l3-te-node-attributes +--rw node-ref? leafref +--rw network-ref? -> /nw:networks/network/network-id augment /nw:networks/nw:network/nw:node/nt:termination-point /l3t:l3-termination-point-attributes: +--rw l3-te-tp-attributes +--rw tp-ref? leafref +--rw node-ref? leafref +--rw network-ref? -> /nw:networks/network/network-id augment /nw:networks/nw:network/nt:link/l3t:l3-link-attributes: +--rw l3-te-link-attributes +--rw link-ref? leafref +--rw network-ref? -> /nw:networks/network/network-id Liu, et al. Expires January 8, 2025 [Page 11] Internet-Draft YANG L3 TE Topology July 2024 4.2. Packet Switching TE Topology Module This module consists of augmentations to the base TE topology model. 4.2.1. Network Types This module augments the network types with a new network type for TE packet topologies. module: ietf-te-topology-packet augment /nw:networks/nw:network/nw:network-types/tet:te-topology: +--rw packet! 4.2.2. Augmentation Groupings The two groupings described in this section specify the performance measurement attributes specific to the packet switching topologies. They are repeatedly used in the module ietf-te-topology-packet to augment various parts of the base TE topology model, as shown in the following sections. 4.2.2.1. Performance Metrics The grouping performance-metrics-attributes-packet is used to specify the performance metrics. This grouping is defined in the module ietf-te-packet-types [I-D.ietf-teas-rfc8776-update]. Liu, et al. Expires January 8, 2025 [Page 12] Internet-Draft YANG L3 TE Topology July 2024 module: ietf-te-packet-types grouping performance-metrics-attributes-packet: +-- performance-metrics-one-way | +-- one-way-delay? uint32 | +-- one-way-delay-normality? | | te-types:performance-metrics-normality | +-- one-way-residual-bandwidth? | | rt-types:bandwidth-ieee-float32 | +-- one-way-residual-bandwidth-normality? | | te-types:performance-metrics-normality | +-- one-way-available-bandwidth? | | rt-types:bandwidth-ieee-float32 | +-- one-way-available-bandwidth-normality? | | te-types:performance-metrics-normality | +-- one-way-utilized-bandwidth? | | rt-types:bandwidth-ieee-float32 | +-- one-way-utilized-bandwidth-normality? | | te-types:performance-metrics-normality | +-- one-way-min-delay? uint32 | +-- one-way-min-delay-normality? | | te-types:performance-metrics-normality | +-- one-way-max-delay? uint32 | +-- one-way-max-delay-normality? | | te-types:performance-metrics-normality | +-- one-way-delay-variation? uint32 | +-- one-way-delay-variation-normality? | | te-types:performance-metrics-normality | +-- one-way-packet-loss? decimal64 | +-- one-way-packet-loss-normality? | te-types:performance-metrics-normality +-- performance-metrics-two-way +-- two-way-delay? uint32 +-- two-way-delay-normality? | te-types:performance-metrics-normality +-- two-way-min-delay? uint32 +-- two-way-min-delay-normality? | te-types:performance-metrics-normality +-- two-way-max-delay? uint32 +-- two-way-max-delay-normality? | te-types:performance-metrics-normality +-- two-way-delay-variation? uint32 +-- two-way-delay-variation-normality? | te-types:performance-metrics-normality +-- two-way-packet-loss? decimal64 +-- two-way-packet-loss-normality? te-types:performance-metrics-normality Liu, et al. Expires January 8, 2025 [Page 13] Internet-Draft YANG L3 TE Topology July 2024 4.2.2.2. Performance Metrics Throttle The grouping performance-metrics-throttle-container-packet is used to specify the throttling parameters. This grouping is defined in the module ietf-te-packet-types [I-D.ietf-teas-rfc8776-update]. module: ietf-te-packet-types grouping performance-metrics-throttle-container-packet: +-- throttle +-- one-way-delay-offset? uint32 +-- measure-interval? uint32 +-- advertisement-interval? uint32 +-- suppression-interval? uint32 +-- threshold-out | +-- one-way-delay? uint32 | +-- one-way-residual-bandwidth? | | rt-types:bandwidth-ieee-float32 | +-- one-way-available-bandwidth? | | rt-types:bandwidth-ieee-float32 | +-- one-way-utilized-bandwidth? | | rt-types:bandwidth-ieee-float32 | +-- two-way-delay? uint32 | +-- one-way-min-delay? uint32 | +-- one-way-max-delay? uint32 | +-- one-way-delay-variation? uint32 | +-- one-way-packet-loss? decimal64 | +-- two-way-min-delay? uint32 | +-- two-way-max-delay? uint32 | +-- two-way-delay-variation? uint32 | +-- two-way-packet-loss? decimal64 +-- threshold-in | +-- one-way-delay? uint32 | +-- one-way-residual-bandwidth? | | rt-types:bandwidth-ieee-float32 | +-- one-way-available-bandwidth? | | rt-types:bandwidth-ieee-float32 | +-- one-way-utilized-bandwidth? | | rt-types:bandwidth-ieee-float32 | +-- two-way-delay? uint32 | +-- one-way-min-delay? uint32 | +-- one-way-max-delay? uint32 | +-- one-way-delay-variation? uint32 | +-- one-way-packet-loss? decimal64 | +-- two-way-min-delay? uint32 | +-- two-way-max-delay? uint32 | +-- two-way-delay-variation? uint32 Liu, et al. Expires January 8, 2025 [Page 14] Internet-Draft YANG L3 TE Topology July 2024 | +-- two-way-packet-loss? decimal64 +-- threshold-accelerated-advertisement +-- one-way-delay? uint32 +-- one-way-residual-bandwidth? | rt-types:bandwidth-ieee-float32 +-- one-way-available-bandwidth? | rt-types:bandwidth-ieee-float32 +-- one-way-utilized-bandwidth? | rt-types:bandwidth-ieee-float32 +-- two-way-delay? uint32 +-- one-way-min-delay? uint32 +-- one-way-max-delay? uint32 +-- one-way-delay-variation? uint32 +-- one-way-packet-loss? decimal64 +-- two-way-min-delay? uint32 +-- two-way-max-delay? uint32 +-- two-way-delay-variation? uint32 +-- two-way-packet-loss? decimal64 4.2.3. Node Connectivity Matrix Attributes The node connectivity matrix attributes are augmented with performance metrics and their throttling parameters when the network type is packet. The grouping performance-metrics-attributes-packet is used as "config false" to specify operattional states. The grouping performance-metrics-throttle-container-packet is kept as "config true" to specify both configurtions and operattional states. augment /nw:networks/nw:network/nw:node/tet:te /tet:te-node-attributes/tet:connectivity-matrices: +---u te-packet-types:performance-metrics-attributes-packet | {te-performance-metric}? +---u te-packet-types:performance-metrics-throttle-container-packet {te-performance-metric}? augment /nw:networks/nw:network/nw:node/tet:te /tet:te-node-attributes/tet:connectivity-matrices /tet:connectivity-matrix: +---u te-packet-types:performance-metrics-attributes-packet | {te-performance-metric}? +---u te-packet-types:performance-metrics-throttle-container-packet {te-performance-metric}? Liu, et al. Expires January 8, 2025 [Page 15] Internet-Draft YANG L3 TE Topology July 2024 4.2.4. Node Information Source The node information source constructs are augmented with states of performance metrics and their throttling parameters when the network type is packet. As the attributes related to the information source are not configurable, both grouping performance-metrics-attributes-packet and performance-metrics-throttle-container-packet are used as "config false" to specify operattional states. augment /nw:networks/nw:network/nw:node/tet:te /tet:information-source-entry/tet:connectivity-matrices: +---u te-packet-types:performance-metrics-attributes-packet | {te-performance-metric}? +---u te-packet-types:performance-metrics-throttle-container-packet {te-performance-metric}? augment /nw:networks/nw:network/nw:node/tet:te /tet:information-source-entry/tet:connectivity-matrices /tet:connectivity-matrix: +---u te-packet-types:performance-metrics-attributes-packet | {te-performance-metric}? +---u te-packet-types:performance-metrics-throttle-container-packet {te-performance-metric}? 4.2.5. Node Local Link Connectivity The node local link connectivity attributes are augmented with performance metrics and their throttling parameters when the network type is packet. The grouping performance-metrics-attributes-packet is used as "config false" to specify operattional states. The grouping performance-metrics-throttle-container-packet is kept as "config true" to specify both configurtions and operattional states. Liu, et al. Expires January 8, 2025 [Page 16] Internet-Draft YANG L3 TE Topology July 2024 augment /nw:networks/nw:network/nw:node/tet:te /tet:tunnel-termination-point /tet:local-link-connectivities: +---u te-packet-types:performance-metrics-attributes-packet | {te-performance-metric}? +---u te-packet-types:performance-metrics-throttle-container-packet {te-performance-metric}? augment /nw:networks/nw:network/nw:node/tet:te /tet:tunnel-termination-point /tet:local-link-connectivities /tet:local-link-connectivity: +---u te-packet-types:performance-metrics-attributes-packet | {te-performance-metric}? +---u te-packet-types:performance-metrics-throttle-container-packet {te-performance-metric}? 4.2.6. Link Template for Performance Metrics The link template attributes are augmented with performance metrics and their throttling parameters when the network type is packet. The grouping performance-metrics-attributes-packet is used as "config false" to specify operattional states. The grouping performance-metrics-throttle-container-packet is kept as "config true" to specify both configurtions and operattional states. augment /nw:networks/tet:te/tet:templates/tet:link-template /tet:te-link-attributes: +---u te-packet-types:performance-metrics-attributes-packet | {te-performance-metric}? +---u te-packet-types:performance-metrics-throttle-container-packet {te-performance-metric}? 4.2.7. Link for Performance Metrics The link attributes are augmented with performance metrics and their throttling parameters when the network type is packet. The grouping performance-metrics-attributes-packet is used as "config false" to specify operattional states. The grouping performance-metrics-throttle-container-packet is kept as "config true" to specify both configurtions and operattional states. Liu, et al. Expires January 8, 2025 [Page 17] Internet-Draft YANG L3 TE Topology July 2024 augment /nw:networks/nw:network/nt:link/tet:te /tet:te-link-attributes: +---u te-packet-types:performance-metrics-attributes-packet | {te-performance-metric}? +---u te-packet-types:performance-metrics-throttle-container-packet {te-performance-metric}? 4.2.8. Link Information Source for Performance Metrics The link information source constructs are augmented with states of performance metrics and their throttling parameters when the network type is packet. As the attributes related to the information source are not configurable, both grouping performance-metrics-attributes-packet and performance-metrics-throttle-container-packet are used as "config false" to specify operattional states. augment /nw:networks/nw:network/nt:link/tet:te /tet:information-source-entry: +---u te-packet-types:performance-metrics-attributes-packet | {te-performance-metric}? +---u te-packet-types:performance-metrics-throttle-container-packet {te-performance-metric}? 4.2.9. Link Template for Packet-specific Attributes The link template attributes are augmented with configurations and states of packet-specific attributes when the network type is packet. augment /nw:networks/tet:te/tet:templates/tet:link-template /tet:te-link-attributes /tet:interface-switching-capability: +--rw packet-switch-capable +--rw minimum-lsp-bandwidth? rt-types:bandwidth-ieee-float32 +--rw interface-mtu? uint16 4.2.10. Link for Packet-specific Attributes The link attributes are augmented with configuration and states of packet-specific attributes when the network type is packet. Liu, et al. Expires January 8, 2025 [Page 18] Internet-Draft YANG L3 TE Topology July 2024 augment /nw:networks/nw:network/nt:link/tet:te /tet:te-link-attributes /tet:interface-switching-capability: +--rw packet-switch-capable +--rw minimum-lsp-bandwidth? rt-types:bandwidth-ieee-float32 +--rw interface-mtu? uint16 4.2.11. Link Information Source for Packet-specific Attributes The link information source constructs are augmented with states of packet-specific attributes when the network type is packet. augment /nw:networks/nw:network/nt:link/tet:te /tet:information-source-entry /tet:interface-switching-capability: +--ro packet-switch-capable +--ro minimum-lsp-bandwidth? rt-types:bandwidth-ieee-float32 +--ro interface-mtu? uint16 4.2.12. TE Bandwidth for Packet-specific Technologies These augmentations specify TE bandwidth for packet-specific technologies. augment /nw:networks/nw:network/nw:node/nt:termination-point/tet:te /tet:interface-switching-capability/tet:max-lsp-bandwidth /tet:te-bandwidth/tet:technology: +--:(packet) +--rw bandwidth-profile-name? string +--rw bandwidth-profile-type? identityref +--rw cir uint64 +--rw cbs uint64 +--rw eir? uint64 +--rw ebs? uint64 +--rw pir? uint64 +--rw pbs? uint64 augment /nw:networks/nw:network/nw:node/tet:te /tet:te-node-attributes/tet:connectivity-matrices /tet:path-constraints/tet:te-bandwidth/tet:technology: +--:(packet) +--rw packet-bandwidth? uint64 augment /nw:networks/nw:network/nw:node/tet:te /tet:te-node-attributes/tet:connectivity-matrices /tet:connectivity-matrix/tet:path-constraints Liu, et al. Expires January 8, 2025 [Page 19] Internet-Draft YANG L3 TE Topology July 2024 /tet:te-bandwidth/tet:technology: +--:(packet) +--rw packet-bandwidth? uint64 augment /nw:networks/nw:network/nw:node/tet:te /tet:information-source-entry/tet:connectivity-matrices /tet:path-constraints/tet:te-bandwidth/tet:technology: +--:(packet) +--ro packet-bandwidth? uint64 augment /nw:networks/nw:network/nw:node/tet:te /tet:information-source-entry/tet:connectivity-matrices /tet:connectivity-matrix/tet:path-constraints /tet:te-bandwidth/tet:technology: +--:(packet) +--ro packet-bandwidth? uint64 augment /nw:networks/nw:network/nw:node/tet:te /tet:tunnel-termination-point/tet:client-layer-adaptation /tet:switching-capability/tet:te-bandwidth /tet:technology: +--:(packet) +--rw packet-bandwidth? uint64 augment /nw:networks/nw:network/nw:node/tet:te /tet:tunnel-termination-point /tet:local-link-connectivities/tet:path-constraints /tet:te-bandwidth/tet:technology: +--:(packet) +--rw packet-bandwidth? uint64 augment /nw:networks/nw:network/nw:node/tet:te /tet:tunnel-termination-point /tet:local-link-connectivities /tet:local-link-connectivity/tet:path-constraints /tet:te-bandwidth/tet:technology: +--:(packet) +--rw packet-bandwidth? uint64 augment /nw:networks/nw:network/nt:link/tet:te /tet:te-link-attributes /tet:interface-switching-capability/tet:max-lsp-bandwidth /tet:te-bandwidth/tet:technology: +--:(packet) +--rw bandwidth-profile-name? string +--rw bandwidth-profile-type? identityref +--rw cir uint64 +--rw cbs uint64 +--rw eir? uint64 +--rw ebs? uint64 +--rw pir? uint64 +--rw pbs? uint64 augment /nw:networks/nw:network/nt:link/tet:te /tet:te-link-attributes/tet:max-link-bandwidth Liu, et al. Expires January 8, 2025 [Page 20] Internet-Draft YANG L3 TE Topology July 2024 /tet:te-bandwidth/tet:technology: +--:(packet) +--rw packet-bandwidth? uint64 augment /nw:networks/nw:network/nt:link/tet:te /tet:te-link-attributes/tet:max-resv-link-bandwidth /tet:te-bandwidth/tet:technology: +--:(packet) +--rw packet-bandwidth? uint64 augment /nw:networks/nw:network/nt:link/tet:te /tet:te-link-attributes/tet:unreserved-bandwidth /tet:te-bandwidth/tet:technology: +--:(packet) +--rw packet-bandwidth? uint64 augment /nw:networks/nw:network/nt:link/tet:te /tet:information-source-entry /tet:interface-switching-capability/tet:max-lsp-bandwidth /tet:te-bandwidth/tet:technology: +--:(packet) +--ro bandwidth-profile-name? string +--ro bandwidth-profile-type? identityref +--ro cir uint64 +--ro cbs uint64 +--ro eir? uint64 +--ro ebs? uint64 +--ro pir? uint64 +--ro pbs? uint64 augment /nw:networks/nw:network/nt:link/tet:te /tet:information-source-entry/tet:max-link-bandwidth /tet:te-bandwidth/tet:technology: +--:(packet) +--ro packet-bandwidth? uint64 augment /nw:networks/nw:network/nt:link/tet:te /tet:information-source-entry/tet:max-resv-link-bandwidth /tet:te-bandwidth/tet:technology: +--:(packet) +--ro packet-bandwidth? uint64 augment /nw:networks/nw:network/nt:link/tet:te /tet:information-source-entry/tet:unreserved-bandwidth /tet:te-bandwidth/tet:technology: +--:(packet) +--ro packet-bandwidth? uint64 augment /nw:networks/tet:te/tet:templates/tet:link-template /tet:te-link-attributes /tet:interface-switching-capability/tet:max-lsp-bandwidth /tet:te-bandwidth/tet:technology: +--:(packet) +--rw bandwidth-profile-name? string +--rw bandwidth-profile-type? identityref Liu, et al. Expires January 8, 2025 [Page 21] Internet-Draft YANG L3 TE Topology July 2024 +--rw cir uint64 +--rw cbs uint64 +--rw eir? uint64 +--rw ebs? uint64 +--rw pir? uint64 +--rw pbs? uint64 augment /nw:networks/tet:te/tet:templates/tet:link-template /tet:te-link-attributes/tet:max-link-bandwidth /tet:te-bandwidth/tet:technology: +--:(packet) +--rw packet-bandwidth? uint64 augment /nw:networks/tet:te/tet:templates/tet:link-template /tet:te-link-attributes/tet:max-resv-link-bandwidth /tet:te-bandwidth/tet:technology: +--:(packet) +--rw packet-bandwidth? uint64 augment /nw:networks/tet:te/tet:templates/tet:link-template /tet:te-link-attributes/tet:unreserved-bandwidth /tet:te-bandwidth/tet:technology: +--:(packet) +--rw packet-bandwidth? uint64 5. YANG Modules 5.1. Layer 3 TE Topology Module This module references [RFC8345], [RFC8346], and [RFC8795]. file "ietf-l3-te-topology@2024-06-08.yang" module ietf-l3-te-topology { yang-version 1.1; namespace "urn:ietf:params:xml:ns:yang:ietf-l3-te-topology"; prefix "l3tet"; import ietf-network { prefix "nw"; reference "RFC 8345: A YANG Data Model for Network Topologies"; } import ietf-network-topology { prefix "nt"; reference "RFC 8345: A YANG Data Model for Network Topologies"; } import ietf-l3-unicast-topology { prefix "l3t"; reference "RFC 8346: A YANG Data Model for Layer 3 Topologies"; } Liu, et al. Expires January 8, 2025 [Page 22] Internet-Draft YANG L3 TE Topology July 2024 import ietf-te-topology { prefix "tet"; reference "RFC 8795: YANG Data Model for Traffic Engineering (TE) Topologies"; } organization "IETF Traffic Engineering Architecture and Signaling (TEAS) Working Group"; contact "WG Web: WG List: Editor: Xufeng Liu Editor: Igor Bryskin Editor: Vishnu Pavan Beeram Editor: Tarek Saad Editor: Himanshu Shah Editor: Oscar Gonzalez De Dios "; description "YANG data model for representing and manipulating Layer 3 TE Topologies. Copyright (c) 2024 IETF Trust and the persons identified as authors of the code. All rights reserved. Redistribution and use in source and binary forms, with or without modification, is permitted pursuant to, and subject to the license terms contained in, the Revised BSD License set forth in Section 4.c of the IETF Trust's Legal Provisions Relating to IETF Documents (https://trustee.ietf.org/license-info). This version of this YANG module is part of RFC XXXX Liu, et al. Expires January 8, 2025 [Page 23] Internet-Draft YANG L3 TE Topology July 2024 (https://www.rfc-editor.org/info/rfcXXXX); see the RFC itself for full legal notices."; revision 2024-06-08 { description "Initial revision"; reference "RFC XXXX: YANG Data Model for Layer 3 TE Topologies"; } grouping l3-te-topology-type { description "Identifies the L3 TE topology type."; container l3-te { presence "Indicates L3 TE Topology"; description "Its presence identifies the L3 TE topology type."; } } augment "/nw:networks/nw:network/nw:network-types/" + "l3t:l3-unicast-topology" { description "Defines the L3 TE topology type."; uses l3-te-topology-type; } augment "/nw:networks/nw:network/l3t:l3-topology-attributes" { when "../nw:network-types/l3t:l3-unicast-topology/l3tet:l3-te" { description "Augment only for L3 TE topology"; } description "Augment topology configuration"; uses l3-te-topology-attributes; } augment "/nw:networks/nw:network/nw:node/l3t:l3-node-attributes" { when "../../nw:network-types/l3t:l3-unicast-topology/" + "l3tet:l3-te" { description "Augment only for L3 TE topology"; } description "Augment node configuration"; uses l3-te-node-attributes; } Liu, et al. Expires January 8, 2025 [Page 24] Internet-Draft YANG L3 TE Topology July 2024 augment "/nw:networks/nw:network/nw:node/nt:termination-point/" + "l3t:l3-termination-point-attributes" { when "../../../nw:network-types/l3t:l3-unicast-topology/" + "l3tet:l3-te" { description "Augment only for L3 TE topology"; } description "Augment termination point configuration"; uses l3-te-tp-attributes; } augment "/nw:networks/nw:network/nt:link/l3t:l3-link-attributes" { when "../../nw:network-types/l3t:l3-unicast-topology/" + "l3tet:l3-te" { description "Augment only for L3 TE topology"; } description "Augment link configuration"; uses l3-te-link-attributes; } grouping l3-te-topology-attributes { description "L3 TE topology scope attributes"; container l3-te-topology-attributes { must "/nw:networks/nw:network" + "[nw:network-id = current()/network-ref]/" + "nw:network-types/tet:te-topology" { error-message "The referenced network must be a TE topology."; description "The referenced network must be a TE topology."; } description "Containing TE topology references"; uses nw:network-ref; } // l3-te-topology-attributes } // l3-te-topology-attributes grouping l3-te-node-attributes { description "L3 TE node scope attributes"; container l3-te-node-attributes { must "/nw:networks/nw:network" + "[nw:network-id = current()/network-ref]/" + "nw:network-types/tet:te-topology" { Liu, et al. Expires January 8, 2025 [Page 25] Internet-Draft YANG L3 TE Topology July 2024 error-message "The referenced network must be a TE topology."; description "The referenced network must be a TE topology."; } description "Containing TE node references"; uses nw:node-ref; } // l3-te } // l3-te-node-attributes grouping l3-te-tp-attributes { description "L3 TE termination point scope attributes"; container l3-te-tp-attributes { must "/nw:networks/nw:network" + "[nw:network-id = current()/network-ref]/" + "nw:network-types/tet:te-topology" { error-message "The referenced network must be a TE topology."; description "The referenced network must be a TE topology."; } description "Containing TE termination point references"; uses nt:tp-ref; } // l3-te } // l3-te-tp-attributes grouping l3-te-link-attributes { description "L3 TE link scope attributes"; container l3-te-link-attributes { must "/nw:networks/nw:network" + "[nw:network-id = current()/network-ref]/" + "nw:network-types/tet:te-topology" { error-message "The referenced network must be a TE topology."; description "The referenced network must be a TE topology."; } description "Containing TE link references"; uses nt:link-ref; } } // l3-te-link-attributes } Liu, et al. Expires January 8, 2025 [Page 26] Internet-Draft YANG L3 TE Topology July 2024 5.2. Packet Switching TE Topology Module This module references [RFC7471], [RFC7823], [RFC8294], [RFC8345], [RFC8570], [RFC8795], and [I-D.ietf-teas-rfc8776-update]. file "ietf-te-topology-packet@2024-06-08.yang" module ietf-te-topology-packet { yang-version 1.1; namespace "urn:ietf:params:xml:ns:yang:ietf-te-topology-packet"; prefix "tet-pkt"; import ietf-network { prefix "nw"; reference "RFC 8345: A YANG Data Model for Network Topologies"; } import ietf-network-topology { prefix "nt"; reference "RFC 8345: A YANG Data Model for Network Topologies"; } import ietf-routing-types { prefix "rt-types"; reference "RFC 8294: Common YANG Data Types for the Routing Area"; } import ietf-te-topology { prefix "tet"; reference "RFC 8795: YANG Data Model for Traffic Engineering (TE) Topologies"; } import ietf-te-types { prefix "te-types"; reference "I-D.ietf-teas-rfc8776-update: Common YANG Data Types for Traffic Engineering"; } import ietf-te-packet-types { prefix "te-packet-types"; reference Liu, et al. Expires January 8, 2025 [Page 27] Internet-Draft YANG L3 TE Topology July 2024 "I-D.ietf-teas-rfc8776-update: Common YANG Data Types for Traffic Engineering"; } organization "Traffic Engineering Architecture and Signaling (TEAS) Working Group"; contact "WG Web: WG List: Editor: Xufeng Liu Editor: Igor Bryskin Editor: Vishnu Pavan Beeram Editor: Tarek Saad Editor: Himanshu Shah Editor: Oscar Gonzalez De Dios "; description "YANG data model for representing and manipulating PSC (Packet Switching) TE Topologies. Copyright (c) 2024 IETF Trust and the persons identified as authors of the code. All rights reserved. Redistribution and use in source and binary forms, with or without modification, is permitted pursuant to, and subject to the license terms contained in, the Revised BSD License set forth in Section 4.c of the IETF Trust's Legal Provisions Relating to IETF Documents (https://trustee.ietf.org/license-info). This version of this YANG module is part of RFC XXXX (https://www.rfc-editor.org/info/rfcXXXX); see the RFC itself for full legal notices."; Liu, et al. Expires January 8, 2025 [Page 28] Internet-Draft YANG L3 TE Topology July 2024 revision 2024-06-08 { description "Initial revision"; reference "RFC XXXX: YANG Data Model for Layer 3 TE Topologies"; } /* * Features */ feature te-performance-metric { description "This feature indicates that the system supports TE performance metric."; reference "RFC7471: OSPF Traffic Engineering (TE) Metric Extensions. RFC8570: IS-IS Traffic Engineering (TE) Metric Extensions. RFC7823: Performance-Based Path Selection for Explicitly Routed Label Switched Paths (LSPs) Using TE Metric Extensions"; } /* * Groupings */ grouping packet-switch-capable-container { description "The container of packet switch capable attributes."; container packet-switch-capable { description "Interface has packet-switching capabilities."; leaf minimum-lsp-bandwidth { type rt-types:bandwidth-ieee-float32; description "Minimum LSP Bandwidth. Units in bytes per second"; } leaf interface-mtu { type uint16; description "Interface MTU."; } } } /* * Augmentations */ Liu, et al. Expires January 8, 2025 [Page 29] Internet-Draft YANG L3 TE Topology July 2024 /* Augmentations to network-types */ augment "/nw:networks/nw:network/nw:network-types/" + "tet:te-topology" { description "Defines the packet TE topology type."; container packet { presence "Indicates packet TE topology."; description "Its presence identifies the packet TE topology type."; } } /* Augmentations to connectivity-matrix */ augment "/nw:networks/nw:network/nw:node/tet:te/" + "tet:te-node-attributes/tet:connectivity-matrices" { when "../../../../nw:network-types/tet:te-topology/" + "tet-pkt:packet" { description "Augment only for packet TE topology"; } description "Parameters for PSC TE topology."; uses te-packet-types:performance-metrics-attributes-packet { if-feature te-performance-metric; refine performance-metrics-one-way { config false; } refine performance-metrics-two-way { config false; } } uses te-packet-types:performance-metrics-throttle-container-packet { if-feature te-performance-metric; } } augment "/nw:networks/nw:network/nw:node/tet:te/" + "tet:te-node-attributes/tet:connectivity-matrices/" + "tet:connectivity-matrix" { when "../../../../../nw:network-types/tet:te-topology/" + "tet-pkt:packet" { description "Augment only for packet TE topology"; } description "Parameters for PSC TE topology."; Liu, et al. Expires January 8, 2025 [Page 30] Internet-Draft YANG L3 TE Topology July 2024 uses te-packet-types:performance-metrics-attributes-packet { if-feature te-performance-metric; refine performance-metrics-one-way { config false; } refine performance-metrics-two-way { config false; } } uses te-packet-types:performance-metrics-throttle-container-packet { if-feature te-performance-metric; } } augment "/nw:networks/nw:network/nw:node/tet:te/" + "tet:information-source-entry/tet:connectivity-matrices" { when "../../../../nw:network-types/tet:te-topology/" + "tet-pkt:packet" { description "Augment only for packet TE topology"; } description "Parameters for PSC TE topology."; uses te-packet-types:performance-metrics-attributes-packet { if-feature te-performance-metric; } uses te-packet-types:performance-metrics-throttle-container-packet { if-feature te-performance-metric; } } augment "/nw:networks/nw:network/nw:node/tet:te/" + "tet:information-source-entry/tet:connectivity-matrices/" + "tet:connectivity-matrix" { when "../../../../../nw:network-types/tet:te-topology/" + "tet-pkt:packet" { description "Augment only for packet TE topology"; } description "Parameters for PSC TE topology."; uses te-packet-types:performance-metrics-attributes-packet { if-feature te-performance-metric; } uses te-packet-types:performance-metrics-throttle-container-packet { Liu, et al. Expires January 8, 2025 [Page 31] Internet-Draft YANG L3 TE Topology July 2024 if-feature te-performance-metric; } } /* Augmentations to tunnel-termination-point */ augment "/nw:networks/nw:network/nw:node/tet:te/" + "tet:tunnel-termination-point/" + "tet:local-link-connectivities" { when "../../../../nw:network-types/tet:te-topology/" + "tet-pkt:packet" { description "Augment only for packet TE topology"; } description "Parameters for PSC TE topology."; uses te-packet-types:performance-metrics-attributes-packet { if-feature te-performance-metric; refine performance-metrics-one-way { config false; } refine performance-metrics-two-way { config false; } } uses te-packet-types:performance-metrics-throttle-container-packet { if-feature te-performance-metric; } } augment "/nw:networks/nw:network/nw:node/tet:te/" + "tet:tunnel-termination-point/" + "tet:local-link-connectivities/" + "tet:local-link-connectivity" { when "../../../../../nw:network-types/tet:te-topology/" + "tet-pkt:packet" { description "Augment only for packet TE topology"; } description "Parameters for PSC TE topology."; uses te-packet-types:performance-metrics-attributes-packet { if-feature te-performance-metric; refine performance-metrics-one-way { config false; } refine performance-metrics-two-way { config false; Liu, et al. Expires January 8, 2025 [Page 32] Internet-Draft YANG L3 TE Topology July 2024 } } uses te-packet-types:performance-metrics-throttle-container-packet { if-feature te-performance-metric; } } /* Augmentations to te-link-attributes */ augment "/nw:networks/tet:te/tet:templates/" + "tet:link-template/tet:te-link-attributes" { when "tet:interface-switching-capability " + "[tet:switching-capability = 'te-types:switching-psc1']" { description "Valid only for PSC"; } description "Parameters for PSC TE topology."; uses te-packet-types:performance-metrics-attributes-packet { if-feature te-performance-metric; refine performance-metrics-one-way { config false; } refine performance-metrics-two-way { config false; } } uses te-packet-types:performance-metrics-throttle-container-packet { if-feature te-performance-metric; } } augment "/nw:networks/nw:network/nt:link/tet:te/" + "tet:te-link-attributes" { when "(../../../nw:network-types/tet:te-topology/tet-pkt:packet)" + " and (tet:interface-switching-capability " + "[tet:switching-capability = 'te-types:switching-psc1'])" { description "Valid only for PSC"; } description "Parameters for PSC TE topology."; uses te-packet-types:performance-metrics-attributes-packet { if-feature te-performance-metric; refine performance-metrics-one-way { config false; } Liu, et al. Expires January 8, 2025 [Page 33] Internet-Draft YANG L3 TE Topology July 2024 refine performance-metrics-two-way { config false; } } uses te-packet-types:performance-metrics-throttle-container-packet { if-feature te-performance-metric; } } augment "/nw:networks/nw:network/nt:link/tet:te/" + "tet:information-source-entry" { when "(../../../nw:network-types/tet:te-topology/tet-pkt:packet)" + " and (tet:interface-switching-capability " + "[tet:switching-capability = 'te-types:switching-psc1'])" { description "Valid only for PSC"; } description "Parameters for PSC TE topology."; uses te-packet-types:performance-metrics-attributes-packet { if-feature te-performance-metric; } uses te-packet-types:performance-metrics-throttle-container-packet { if-feature te-performance-metric; } } /* Augmentations to interface-switching-capability */ augment "/nw:networks/tet:te/tet:templates/" + "tet:link-template/tet:te-link-attributes/" + "tet:interface-switching-capability" { when "tet:switching-capability = 'te-types:switching-psc1' " { description "Valid only for PSC"; } description "Parameters for PSC TE topology."; uses packet-switch-capable-container; } augment "/nw:networks/nw:network/nt:link/tet:te/" + "tet:te-link-attributes/" + "tet:interface-switching-capability" { when "(../../../../nw:network-types/tet:te-topology/" + "tet-pkt:packet) and " + "(tet:switching-capability = 'te-types:switching-psc1')" { Liu, et al. Expires January 8, 2025 [Page 34] Internet-Draft YANG L3 TE Topology July 2024 description "Valid only for PSC"; } description "Parameters for PSC TE topology."; uses packet-switch-capable-container; } augment "/nw:networks/nw:network/nt:link/tet:te/" + "tet:information-source-entry/" + "tet:interface-switching-capability" { when "(../../../../nw:network-types/tet:te-topology/" + "tet-pkt:packet) and " + "(tet:switching-capability = 'te-types:switching-psc1')" { description "Valid only for PSC"; } description "Parameters for PSC TE topology."; uses packet-switch-capable-container; } /* * Augment TE bandwidth */ augment "/nw:networks/nw:network/nw:node/nt:termination-point/" + "tet:te/" + "tet:interface-switching-capability/tet:max-lsp-bandwidth/" + "tet:te-bandwidth/tet:technology" { when "../../../../../../nw:network-types/tet:te-topology/" + "tet-pkt:packet" { description "Augmentation parameters apply only for networks with Packet TE topology type."; } description "Augment maximum LSP TE bandwidth for the link termination point (LTP)."; case packet { uses te-packet-types:te-packet-path-bandwidth; } } augment "/nw:networks/nw:network/nw:node/tet:te/" + "tet:te-node-attributes/tet:connectivity-matrices/" + "tet:path-constraints/tet:te-bandwidth/tet:technology" { when "../../../../../../nw:network-types/tet:te-topology/" Liu, et al. Expires January 8, 2025 [Page 35] Internet-Draft YANG L3 TE Topology July 2024 + "tet-pkt:packet" { description "Augmentation parameters apply only for networks with Packet TE topology type."; } description "Augment TE bandwidth path constraints of the TE node connectivity matrices."; case packet { uses te-packet-types:te-packet-link-bandwidth; } } augment "/nw:networks/nw:network/nw:node/tet:te/" + "tet:te-node-attributes/tet:connectivity-matrices/" + "tet:connectivity-matrix/" + "tet:path-constraints/tet:te-bandwidth/tet:technology" { when "../../../../../../../nw:network-types/tet:te-topology/" + "tet-pkt:packet" { description "Augmentation parameters apply only for networks with Packet TE topology type."; } description "Augment TE bandwidth path constraints of the connectivity matrix entry."; case packet { uses te-packet-types:te-packet-link-bandwidth; } } augment "/nw:networks/nw:network/nw:node/tet:te/" + "tet:information-source-entry/tet:connectivity-matrices/" + "tet:path-constraints/tet:te-bandwidth/tet:technology" { when "../../../../../../nw:network-types/tet:te-topology/" + "tet-pkt:packet" { description "Augmentation parameters apply only for networks with Packet TE topology type."; } description "Augment TE bandwidth path constraints of the TE node connectivity matrices information source."; case packet { uses te-packet-types:te-packet-link-bandwidth; } } Liu, et al. Expires January 8, 2025 [Page 36] Internet-Draft YANG L3 TE Topology July 2024 augment "/nw:networks/nw:network/nw:node/tet:te/" + "tet:information-source-entry/tet:connectivity-matrices/" + "tet:connectivity-matrix/" + "tet:path-constraints/tet:te-bandwidth/tet:technology" { when "../../../../../../../nw:network-types/tet:te-topology/" + "tet-pkt:packet" { description "Augmentation parameters apply only for networks with Packet TE topology type."; } description "Augment TE bandwidth path constraints of the connectivity matrix entry information source"; case packet { uses te-packet-types:te-packet-link-bandwidth; } } augment "/nw:networks/nw:network/nw:node/tet:te/" + "tet:tunnel-termination-point/" + "tet:client-layer-adaptation/tet:switching-capability/" + "tet:te-bandwidth/tet:technology" { when "../../../../../../nw:network-types/tet:te-topology/" + "tet-pkt:packet" { description "Augmentation parameters apply only for networks with Packet TE topology type."; } description "Augment client TE bandwidth of the tunnel termination point (TTP)"; case packet { uses te-packet-types:te-packet-link-bandwidth; } } augment "/nw:networks/nw:network/nw:node/tet:te/" + "tet:tunnel-termination-point/" + "tet:local-link-connectivities/tet:path-constraints/" + "tet:te-bandwidth/tet:technology" { when "../../../../../../nw:network-types/tet:te-topology/" + "tet-pkt:packet" { description "Augmentation parameters apply only for networks with Packet TE topology type."; } description "Augment TE bandwidth path constraints for the TTP Liu, et al. Expires January 8, 2025 [Page 37] Internet-Draft YANG L3 TE Topology July 2024 Local Link Connectivities."; case packet { uses te-packet-types:te-packet-link-bandwidth; } } augment "/nw:networks/nw:network/nw:node/tet:te/" + "tet:tunnel-termination-point/" + "tet:local-link-connectivities/" + "tet:local-link-connectivity/tet:path-constraints/" + "tet:te-bandwidth/tet:technology" { when "../../../../../../../nw:network-types/tet:te-topology/" + "tet-pkt:packet" { description "Augmentation parameters apply only for networks with Packet TE topology type."; } description "Augment TE bandwidth path constraints for the TTP Local Link Connectivity entry."; case packet { uses te-packet-types:te-packet-link-bandwidth; } } augment "/nw:networks/nw:network/nt:link/tet:te/" + "tet:te-link-attributes/" + "tet:interface-switching-capability/tet:max-lsp-bandwidth/" + "tet:te-bandwidth/tet:technology" { when "../../../../../../nw:network-types/tet:te-topology/" + "tet-pkt:packet" { description "Augmentation parameters apply only for networks with Packet TE topology type."; } description "Augment maximum LSP TE bandwidth for the TE link."; case packet { uses te-packet-types:te-packet-path-bandwidth; } } augment "/nw:networks/nw:network/nt:link/tet:te/" + "tet:te-link-attributes/" + "tet:max-link-bandwidth/" + "tet:te-bandwidth/tet:technology" { when "../../../../../nw:network-types/tet:te-topology/" + "tet-pkt:packet" { Liu, et al. Expires January 8, 2025 [Page 38] Internet-Draft YANG L3 TE Topology July 2024 description "Augmentation parameters apply only for networks with Packet TE topology type."; } description "Augment maximum TE bandwidth for the TE link"; case packet { uses te-packet-types:te-packet-link-bandwidth; } } augment "/nw:networks/nw:network/nt:link/tet:te/" + "tet:te-link-attributes/" + "tet:max-resv-link-bandwidth/" + "tet:te-bandwidth/tet:technology" { when "../../../../../nw:network-types/tet:te-topology/" + "tet-pkt:packet" { description "Augmentation parameters apply only for networks with Packet TE topology type."; } description "Augment maximum reservable TE bandwidth for the TE link"; case packet { uses te-packet-types:te-packet-link-bandwidth; } } augment "/nw:networks/nw:network/nt:link/tet:te/" + "tet:te-link-attributes/" + "tet:unreserved-bandwidth/" + "tet:te-bandwidth/tet:technology" { when "../../../../../nw:network-types/tet:te-topology/" + "tet-pkt:packet" { description "Augmentation parameters apply only for networks with Packet TE topology type."; } description "Augment unreserved TE bandwidth for the TE Link"; case packet { uses te-packet-types:te-packet-link-bandwidth; } } augment "/nw:networks/nw:network/nt:link/tet:te/" + "tet:information-source-entry/" + "tet:interface-switching-capability/" Liu, et al. Expires January 8, 2025 [Page 39] Internet-Draft YANG L3 TE Topology July 2024 + "tet:max-lsp-bandwidth/" + "tet:te-bandwidth/tet:technology" { when "../../../../../../nw:network-types/tet:te-topology/" + "tet-pkt:packet" { description "Augmentation parameters apply only for networks with Packet TE topology type."; } description "Augment maximum LSP TE bandwidth for the TE link information source"; case packet { uses te-packet-types:te-packet-path-bandwidth; } } augment "/nw:networks/nw:network/nt:link/tet:te/" + "tet:information-source-entry/" + "tet:max-link-bandwidth/" + "tet:te-bandwidth/tet:technology" { when "../../../../../nw:network-types/tet:te-topology/" + "tet-pkt:packet" { description "Augmentation parameters apply only for networks with Packet TE topology type."; } description "Augment maximum TE bandwidth for the TE link information source"; case packet { uses te-packet-types:te-packet-link-bandwidth; } } augment "/nw:networks/nw:network/nt:link/tet:te/" + "tet:information-source-entry/" + "tet:max-resv-link-bandwidth/" + "tet:te-bandwidth/tet:technology" { when "../../../../../nw:network-types/tet:te-topology/" + "tet-pkt:packet" { description "Augmentation parameters apply only for networks with Packet TE topology type."; } description "Augment maximum reservable TE bandwidth for the TE link information-source"; case packet { Liu, et al. Expires January 8, 2025 [Page 40] Internet-Draft YANG L3 TE Topology July 2024 uses te-packet-types:te-packet-link-bandwidth; } } augment "/nw:networks/nw:network/nt:link/tet:te/" + "tet:information-source-entry/" + "tet:unreserved-bandwidth/" + "tet:te-bandwidth/tet:technology" { when "../../../../../nw:network-types/tet:te-topology/" + "tet-pkt:packet" { description "Augmentation parameters apply only for networks with Packet TE topology type."; } description "Augment unreserved TE bandwidth of the TE link information source"; case packet { uses te-packet-types:te-packet-link-bandwidth; } } augment "/nw:networks/tet:te/tet:templates/" + "tet:link-template/tet:te-link-attributes/" + "tet:interface-switching-capability/" + "tet:max-lsp-bandwidth/" + "tet:te-bandwidth/tet:technology" { description "Augment maximum LSP TE bandwidth of the TE link template"; case packet { uses te-packet-types:te-packet-path-bandwidth; } } augment "/nw:networks/tet:te/tet:templates/" + "tet:link-template/tet:te-link-attributes/" + "tet:max-link-bandwidth/" + "tet:te-bandwidth/tet:technology" { description "Augment maximum TE bandwidth the TE link template"; case packet { uses te-packet-types:te-packet-link-bandwidth; } } augment "/nw:networks/tet:te/tet:templates/" + "tet:link-template/tet:te-link-attributes/" Liu, et al. Expires January 8, 2025 [Page 41] Internet-Draft YANG L3 TE Topology July 2024 + "tet:max-resv-link-bandwidth/" + "tet:te-bandwidth/tet:technology" { description "Augment maximum reservable TE bandwidth for the TE link template."; case packet { uses te-packet-types:te-packet-link-bandwidth; } } augment "/nw:networks/tet:te/tet:templates/" + "tet:link-template/tet:te-link-attributes/" + "tet:unreserved-bandwidth/" + "tet:te-bandwidth/tet:technology" { description "Augment unreserved TE bandwidth the TE link template"; case packet { uses te-packet-types:te-packet-link-bandwidth; } } } 6. IANA Considerations RFC Ed.: In this section, replace all occurrences of 'XXXX' with the actual RFC number (and remove this note). This document registers the following namespace URIs in the IETF XML registry [RFC3688]: -------------------------------------------------------------------- URI: urn:ietf:params:xml:ns:yang:ietf-l3-te-topology Registrant Contact: The IESG. XML: N/A, the requested URI is an XML namespace. -------------------------------------------------------------------- -------------------------------------------------------------------- URI: urn:ietf:params:xml:ns:yang:ietf-l3-te-topology-state Registrant Contact: The IESG. XML: N/A, the requested URI is an XML namespace. -------------------------------------------------------------------- Liu, et al. Expires January 8, 2025 [Page 42] Internet-Draft YANG L3 TE Topology July 2024 -------------------------------------------------------------------- URI: urn:ietf:params:xml:ns:yang:ietf-te-topology-packet Registrant Contact: The IESG. XML: N/A, the requested URI is an XML namespace. -------------------------------------------------------------------- -------------------------------------------------------------------- URI: urn:ietf:params:xml:ns:yang:ietf-te-topology-packet-state Registrant Contact: The IESG. XML: N/A, the requested URI is an XML namespace. -------------------------------------------------------------------- This document registers the following YANG modules in the YANG Module Names registry [RFC6020]: -------------------------------------------------------------------- name: ietf-l3-te-topology namespace: urn:ietf:params:xml:ns:yang:ietf-l3-te-topology prefix: l3tet reference: RFC XXXX -------------------------------------------------------------------- -------------------------------------------------------------------- name: ietf-l3-te-topology-state namespace: urn:ietf:params:xml:ns:yang:ietf-l3-te-topology-state prefix: l3tet-s reference: RFC XXXX -------------------------------------------------------------------- -------------------------------------------------------------------- name: ietf-te-topology-packet namespace: urn:ietf:params:xml:ns:yang:ietf-te-topology-packet prefix: tet-pkt reference: RFC XXXX -------------------------------------------------------------------- -------------------------------------------------------------------- name: ietf-te-topology-packet-state namespace: urn:ietf:params:xml:ns:yang:ietf-te-topology-packet-state prefix: tet-pkt-s reference: RFC XXXX -------------------------------------------------------------------- 7. Security Considerations The YANG module specified in this document defines a schema for data that is designed to be accessed via network management protocols such as NETCONF [RFC6241] or RESTCONF [RFC8040]. The lowest NETCONF layer Liu, et al. Expires January 8, 2025 [Page 43] Internet-Draft YANG L3 TE Topology July 2024 is the secure transport layer, and the mandatory-to-implement secure transport is Secure Shell (SSH) [RFC6242]. The lowest RESTCONF layer is HTTPS, and the mandatory-to-implement secure transport is TLS [RFC8446]. The Network Configuration Access Control Model (NACM) [RFC8341] provides the means to restrict access for particular NETCONF or RESTCONF users to a preconfigured subset of all available NETCONF or RESTCONF protocol operations and content. There are a number of data nodes defined in this YANG module that are writable/creatable/deletable (i.e., config true, which is the default). These data nodes may be considered sensitive or vulnerable in some network environments. Write operations (e.g., edit-config) to these data nodes without proper protection can have a negative effect on network operations. These are the subtrees and data nodes and their sensitivity/vulnerability: /nw:networks/nw:network/nw:network-types/l3t:l3-unicast-topology/ l3-te This subtree specifies the layer 3 TE topology type. Modifying the configurations can make layer 3 TE topology type invalid and cause interruption to all layer 3 TE networks. /nw:networks/nw:network/l3t:l3-topology-attributes/l3-te-topology- attributes This subtree specifies the topology-wide configurations, including the reference to a TE topology from a layer 3 TE topology. Modifying the configurations here can cause traffic disabled or rerouted in this topology and the connected topologies. /nw:networks/nw:network/nw:node/l3t:l3-node-attributes/l3-te-node- attributes This subtree specifies the configurations of layer 3 TE nodes. Modifying the configurations in this subtree can change the relationship between a TE node and a node in a layer 3 TE topology, causing traffic disabled or rerouted in the specified nodes and the related layer 3 topologies. /nw:networks/nw:network/nw:node/nt:termination-point//l3t:l3- termination-point-attributes/l3-te-tp-attributes This subtree specifies the configurations of layer 3 TE link termination points. Modifying the configurations in this subtree can change the relationship between a TE link termination point and a link termination point in a layer 3 TE topology, causing traffic disabled or rerouted on the related layer 3 links and the related layer 3 topologies. Liu, et al. Expires January 8, 2025 [Page 44] Internet-Draft YANG L3 TE Topology July 2024 /nw:networks/nw:network/nt:link/l3t:l3-link-attributes/l3-te-link- attributes This subtree specifies the configurations of layer 3 TE links. Modifying the configurations in this subtree can change the relationship between a TE link and a link in a layer 3 TE topology, causing traffic disabled or rerouted on the specified layer 3 link and the related layer 3 topologies. performance-metric containers The container "performance-metric" is augmented to multiple locations of the base TE topology model, as specified in Section 3.2. Modifying the configuration in such a container can change the behaviors of performance metric monitoring, causing traffic disabled or rerouted on the related layer 3 links, nodes, or topologies. Some of the readable data nodes in this YANG module may be considered sensitive or vulnerable in some network environments. It is thus important to control read access (e.g., via get, get-config, or notification) to these data nodes. These are the subtrees and data nodes and their sensitivity/vulnerability: /nw:networks/nw:network/nw:network-types/l3t:l3-unicast-topology/ l3-te Unauthorized access to this subtree can disclose the layer 3 TE topology type. /nw:networks/nw:network/l3t:l3-topology-attributes/l3-te-topology- attributes Unauthorized access to this subtree can disclose the topology-wide configurations, including the reference to a TE topology from a layer 3 topology. /nw:networks/nw:network/nw:node/l3t:l3-node-attributes/l3-te-node- attributes Unauthorized access to this subtree can disclose the operational state information of layer 3 TE nodes. /nw:networks/nw:network/nw:node/nt:termination-point//l3t:l3- termination-point-attributes/l3-te-tp-attributes Unauthorized access to this subtree can disclose the operational state information of layer 3 TE link termination points. /nw:networks/nw:network/nt:link/l3t:l3-link-attributes/l3-te-link- attributes Unauthorized access to this subtree can disclose the operational state information of layer 3 TE links. Liu, et al. Expires January 8, 2025 [Page 45] Internet-Draft YANG L3 TE Topology July 2024 performance-metric containers The container "performance-metric" is augmented to multiple locations of the base TE topology model, as specified in Section 3.2. Unauthorized access to this subtree can disclose the operational state information of performance metric monitoring. 8. References 8.1. Normative References [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, DOI 10.17487/RFC2119, March 1997, . [RFC3471] Berger, L., Ed., "Generalized Multi-Protocol Label Switching (GMPLS) Signaling Functional Description", RFC 3471, DOI 10.17487/RFC3471, January 2003, . [RFC3688] Mealling, M., "The IETF XML Registry", BCP 81, RFC 3688, DOI 10.17487/RFC3688, January 2004, . [RFC6020] Bjorklund, M., Ed., "YANG - A Data Modeling Language for the Network Configuration Protocol (NETCONF)", RFC 6020, DOI 10.17487/RFC6020, October 2010, . [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, . [RFC6242] Wasserman, M., "Using the NETCONF Protocol over Secure Shell (SSH)", RFC 6242, DOI 10.17487/RFC6242, June 2011, . [RFC7074] Berger, L. and J. Meuric, "Revised Definition of the GMPLS Switching Capability and Type Fields", RFC 7074, DOI 10.17487/RFC7074, November 2013, . [RFC7471] Giacalone, S., Ward, D., Drake, J., Atlas, A., and S. Previdi, "OSPF Traffic Engineering (TE) Metric Extensions", RFC 7471, DOI 10.17487/RFC7471, March 2015, . Liu, et al. Expires January 8, 2025 [Page 46] Internet-Draft YANG L3 TE Topology July 2024 [RFC7950] Bjorklund, M., Ed., "The YANG 1.1 Data Modeling Language", RFC 7950, DOI 10.17487/RFC7950, August 2016, . [RFC8040] Bierman, A., Bjorklund, M., and K. Watsen, "RESTCONF Protocol", RFC 8040, DOI 10.17487/RFC8040, January 2017, . [RFC8174] Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC 2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174, May 2017, . [RFC8294] Liu, X., Qu, Y., Lindem, A., Hopps, C., and L. Berger, "Common YANG Data Types for the Routing Area", RFC 8294, DOI 10.17487/RFC8294, December 2017, . [RFC8341] Bierman, A. and M. Bjorklund, "Network Configuration Access Control Model", STD 91, RFC 8341, DOI 10.17487/RFC8341, March 2018, . [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, . [RFC8345] Clemm, A., Medved, J., Varga, R., Bahadur, N., Ananthakrishnan, H., and X. Liu, "A YANG Data Model for Network Topologies", RFC 8345, DOI 10.17487/RFC8345, March 2018, . [RFC8346] Clemm, A., Medved, J., Varga, R., Liu, X., Ananthakrishnan, H., and N. Bahadur, "A YANG Data Model for Layer 3 Topologies", RFC 8346, DOI 10.17487/RFC8346, March 2018, . [RFC8446] Rescorla, E., "The Transport Layer Security (TLS) Protocol Version 1.3", RFC 8446, DOI 10.17487/RFC8446, August 2018, . [RFC8570] Ginsberg, L., Ed., Previdi, S., Ed., Giacalone, S., Ward, D., Drake, J., and Q. Wu, "IS-IS Traffic Engineering (TE) Metric Extensions", RFC 8570, DOI 10.17487/RFC8570, March 2019, . Liu, et al. Expires January 8, 2025 [Page 47] Internet-Draft YANG L3 TE Topology July 2024 [RFC8795] Liu, X., Bryskin, I., Beeram, V., Saad, T., Shah, H., and O. Gonzalez de Dios, "YANG Data Model for Traffic Engineering (TE) Topologies", RFC 8795, DOI 10.17487/RFC8795, August 2020, . [I-D.ietf-teas-rfc8776-update] Busi, I., Guo, A., Liu, X., Saad, T., and I. Bryskin, "Common YANG Data Types for Traffic Engineering", draft- ietf-teas-rfc8776-update-11 (work in progress), May 2024, . 8.2. Informative References [RFC7823] Atlas, A., Drake, J., Giacalone, S., and S. Previdi, "Performance-Based Path Selection for Explicitly Routed Label Switched Paths (LSPs) Using TE Metric Extensions", RFC 7823, DOI 10.17487/RFC7823, May 2016, . [RFC7951] Lhotka, L., "JSON Encoding of Data Modeled with YANG", RFC 7951, DOI 10.17487/RFC7951, August 2016, . [RFC8340] Bjorklund, M. and L. Berger, Ed., "YANG Tree Diagrams", BCP 215, RFC 8340, DOI 10.17487/RFC8340, March 2018, . [RFC9375] Wu, B., Ed., Wu, Q., Ed., Boucadair, M., Ed., Gonzalez de Dios, O., and B. Wen, "A YANG Data Model for Network and VPN Service Performance Monitoring", RFC 9375, DOI 10.17487/RFC9375, April 2023, . [I-D.ietf-teas-yang-sr-te-topo] Liu, X., Bryskin, I., Beeram, V., Saad, T., Shah, H., and S. Litkowski, "YANG Data Model for SR and SR TE Topologies on MPLS Data Plane", draft-ietf-teas-yang-sr-te-topo-18 (work in progress), October 2023, . Liu, et al. Expires January 8, 2025 [Page 48] Internet-Draft YANG L3 TE Topology July 2024 [I-D.ietf-teas-yang-te-mpls-topology] Busi, I., Guo, A., Liu, X., Saad, T., and R. Gandhi, "A YANG Data Model for MPLS-TE Topology", draft-ietf-teas- yang-te-mpls-topology-00 (work in progress), March 2024, . Liu, et al. Expires January 8, 2025 [Page 49] Internet-Draft YANG L3 TE Topology July 2024 Appendix A. Companion YANG Model for Non-NMDA Compliant Implementations The YANG modules ietf-l3-te-topology and ietf-te-topology-packet defined in this document are designed to be used in conjunction with implementations that support the Network Management Datastore Architecture (NMDA) defined in [RFC8342]. In order to allow implementations to use the model even in cases when NMDA is not supported, the following companion modules, ietf-l3-te-topology-state and ietf-te-topology-packet-state, are defined as state models, which mirror the modules ietf-l3-te-topology and ietf-te-topology-packet defined earlier in this document. However, all data nodes in the companion module are non-configurable, to represent the applied configuration or the derived operational states. The companion modules, ietf-l3-te-topology-state and ietf-te- topology-packet-state, are redundant and SHOULD NOT be supported by implementations that support NMDA. As the structure of the companion modules mirrors that of the coorespinding NMDA models, the YANG trees of the companion modules are not depicted separately. A.1. Layer 3 TE Topology State Module This module references [RFC8345], and [RFC8346]. file "ietf-l3-te-topology-state@2024-06-08.yang" module ietf-l3-te-topology-state { yang-version 1.1; namespace "urn:ietf:params:xml:ns:yang:ietf-l3-te-topology-state"; prefix "l3tet-s"; import ietf-l3-te-topology { prefix "l3tet"; reference "RFC XXXX: YANG Data Model for Layer 3 TE Topologies"; } import ietf-network-state { prefix "nw-s"; reference "RFC 8345: A YANG Data Model for Network Topologies"; } import ietf-network-topology-state { prefix "nt-s"; reference "RFC 8345: A YANG Data Model for Network Topologies"; } import ietf-l3-unicast-topology-state { prefix "l3t-s"; Liu, et al. Expires January 8, 2025 [Page 50] Internet-Draft YANG L3 TE Topology July 2024 reference "RFC 8346: A YANG Data Model for Layer 3 Topologies"; } organization "IETF Traffic Engineering Architecture and Signaling (TEAS) Working Group"; contact "WG Web: WG List: Editor: Xufeng Liu Editor: Igor Bryskin Editor: Vishnu Pavan Beeram Editor: Tarek Saad Editor: Himanshu Shah Editor: Oscar Gonzalez De Dios "; description "YANG data model for representing operational state information of Layer 3 TE Topologies, when NMDA is not supported. Copyright (c) 2024 IETF Trust and the persons identified as authors of the code. All rights reserved. Redistribution and use in source and binary forms, with or without modification, is permitted pursuant to, and subject to the license terms contained in, the Revised BSD License set forth in Section 4.c of the IETF Trust's Legal Provisions Relating to IETF Documents (https://trustee.ietf.org/license-info). This version of this YANG module is part of RFC XXXX (https://www.rfc-editor.org/info/rfcXXXX); see the RFC itself for full legal notices."; revision 2024-06-08 { Liu, et al. Expires January 8, 2025 [Page 51] Internet-Draft YANG L3 TE Topology July 2024 description "Initial revision"; reference "RFC XXXX: YANG Data Model for Layer 3 TE Topologies"; } augment "/nw-s:networks/nw-s:network/nw-s:network-types/" + "l3t-s:l3-unicast-topology" { description "Defines the L3 TE topology type."; uses l3tet:l3-te-topology-type; } augment "/nw-s:networks/nw-s:network/" + "l3t-s:l3-topology-attributes" { when "../nw-s:network-types/l3t-s:l3-unicast-topology/" + "l3tet-s:l3-te" { description "Augment only for L3 TE topology"; } description "Augment topology configuration"; uses l3tet:l3-te-topology-attributes; } augment "/nw-s:networks/nw-s:network/nw-s:node/" + "l3t-s:l3-node-attributes" { when "../../nw-s:network-types/l3t-s:l3-unicast-topology/" + "l3tet-s:l3-te" { description "Augment only for L3 TE topology"; } description "Augment node configuration"; uses l3tet:l3-te-node-attributes; } augment "/nw-s:networks/nw-s:network/nw-s:node/" + "nt-s:termination-point/" + "l3t-s:l3-termination-point-attributes" { when "../../../nw-s:network-types/l3t-s:l3-unicast-topology/" + "l3tet-s:l3-te" { description "Augment only for L3 TE topology"; } description "Augment termination point configuration"; uses l3tet:l3-te-tp-attributes; } Liu, et al. Expires January 8, 2025 [Page 52] Internet-Draft YANG L3 TE Topology July 2024 augment "/nw-s:networks/nw-s:network/nt-s:link/" + "l3t-s:l3-link-attributes" { when "../../nw-s:network-types/l3t-s:l3-unicast-topology/" + "l3tet-s:l3-te" { description "Augment only for L3 TE topology"; } description "Augment link configuration"; uses l3tet:l3-te-link-attributes; } } A.2. Packet Switching TE Topology State Module This module references [RFC8345], [RFC8795], and [I-D.ietf-teas-rfc8776-update]. file "ietf-te-topology-packet-state@2024-06-08.yang" module ietf-te-topology-packet-state { yang-version 1.1; namespace "urn:ietf:params:xml:ns:yang:ietf-te-topology-packet-state"; prefix "tet-pkt-s"; import ietf-te-topology-packet { prefix "tet-pkt"; reference "RFC XXXX: YANG Data Model for Layer 3 TE Topologies"; } import ietf-network-state { prefix "nw-s"; reference "RFC 8345: A YANG Data Model for Network Topologies"; } import ietf-network-topology-state { prefix "nt-s"; reference "RFC 8345: A YANG Data Model for Network Topologies"; } Liu, et al. Expires January 8, 2025 [Page 53] Internet-Draft YANG L3 TE Topology July 2024 import ietf-te-topology-state { prefix "tet-s"; reference "RFC 8795: YANG Data Model for Traffic Engineering (TE) Topologies"; } import ietf-te-types { prefix "te-types"; reference "I-D.ietf-teas-rfc8776-update: Common YANG Data Types for Traffic Engineering"; } import ietf-te-packet-types { prefix "te-packet-types"; reference "I-D.ietf-teas-rfc8776-update: Common YANG Data Types for Traffic Engineering"; } organization "Traffic Engineering Architecture and Signaling (TEAS) Working Group"; contact "WG Web: WG List: Editor: Xufeng Liu Editor: Igor Bryskin Editor: Vishnu Pavan Beeram Editor: Tarek Saad Editor: Himanshu Shah Editor: Oscar Gonzalez De Dios "; description Liu, et al. Expires January 8, 2025 [Page 54] Internet-Draft YANG L3 TE Topology July 2024 "YANG data model for representing operational state information of PSC (Packet Switching) TE Topologies, when NMDA is not supported. Copyright (c) 2024 IETF Trust and the persons identified as authors of the code. All rights reserved. Redistribution and use in source and binary forms, with or without modification, is permitted pursuant to, and subject to the license terms contained in, the Revised BSD License set forth in Section 4.c of the IETF Trust's Legal Provisions Relating to IETF Documents (https://trustee.ietf.org/license-info). This version of this YANG module is part of RFC XXXX (https://www.rfc-editor.org/info/rfcXXXX); see the RFC itself for full legal notices."; revision 2024-06-08 { description "Initial revision"; reference "RFC XXXX: YANG Data Model for Layer 3 TE Topologies"; } /* * Augmentations */ /* Augmentations to network-types */ augment "/nw-s:networks/nw-s:network/nw-s:network-types/" + "tet-s:te-topology" { description "Defines the packet TE topology type."; container packet { presence "Indicates packet TE topology."; description "Its presence identifies the packet TE topology type."; } } /* Augmentations to connectivity-matrix */ augment "/nw-s:networks/nw-s:network/nw-s:node/tet-s:te/" + "tet-s:te-node-attributes/tet-s:connectivity-matrices" { when "../../../../nw-s:network-types/tet-s:te-topology/" + "tet-pkt-s:packet" { description "Augment only for packet TE topology"; Liu, et al. Expires January 8, 2025 [Page 55] Internet-Draft YANG L3 TE Topology July 2024 } description "Parameters for PSC (Packet Switching) TE topology."; uses te-packet-types:performance-metrics-attributes-packet { if-feature tet-pkt:te-performance-metric; } uses te-packet-types:performance-metrics-throttle-container-packet { if-feature tet-pkt:te-performance-metric; } } augment "/nw-s:networks/nw-s:network/nw-s:node/tet-s:te/" + "tet-s:te-node-attributes/tet-s:connectivity-matrices/" + "tet-s:connectivity-matrix" { when "../../../../../nw-s:network-types/tet-s:te-topology/" + "tet-pkt-s:packet" { description "Augment only for packet TE topology"; } description "Parameters for PSC TE topology."; uses te-packet-types:performance-metrics-attributes-packet { if-feature tet-pkt:te-performance-metric; } uses te-packet-types:performance-metrics-throttle-container-packet { if-feature tet-pkt:te-performance-metric; } } augment "/nw-s:networks/nw-s:network/nw-s:node/tet-s:te/" + "tet-s:information-source-entry/" + "tet-s:connectivity-matrices" { when "../../../../nw-s:network-types/tet-s:te-topology/" + "tet-pkt-s:packet" { description "Augment only for packet TE topology"; } description "Parameters for PSC TE topology."; uses te-packet-types:performance-metrics-attributes-packet { if-feature tet-pkt:te-performance-metric; } uses te-packet-types:performance-metrics-throttle-container-packet { if-feature tet-pkt:te-performance-metric; } Liu, et al. Expires January 8, 2025 [Page 56] Internet-Draft YANG L3 TE Topology July 2024 } augment "/nw-s:networks/nw-s:network/nw-s:node/tet-s:te/" + "tet-s:information-source-entry/" + "tet-s:connectivity-matrices/" + "tet-s:connectivity-matrix" { when "../../../../../nw-s:network-types/tet-s:te-topology/" + "tet-pkt-s:packet" { description "Augment only for packet TE topology"; } description "Parameters for PSC TE topology."; uses te-packet-types:performance-metrics-attributes-packet { if-feature tet-pkt:te-performance-metric; } uses te-packet-types:performance-metrics-throttle-container-packet { if-feature tet-pkt:te-performance-metric; } } /* Augmentations to tunnel-termination-point */ augment "/nw-s:networks/nw-s:network/nw-s:node/tet-s:te/" + "tet-s:tunnel-termination-point/" + "tet-s:local-link-connectivities" { when "../../../../nw-s:network-types/tet-s:te-topology/" + "tet-pkt-s:packet" { description "Augment only for packet TE topology"; } description "Parameters for PSC TE topology."; uses te-packet-types:performance-metrics-attributes-packet { if-feature tet-pkt:te-performance-metric; } uses te-packet-types:performance-metrics-throttle-container-packet { if-feature tet-pkt:te-performance-metric; } } augment "/nw-s:networks/nw-s:network/nw-s:node/tet-s:te/" + "tet-s:tunnel-termination-point/" + "tet-s:local-link-connectivities/" + "tet-s:local-link-connectivity" { when "../../../../../nw-s:network-types/tet-s:te-topology/" + "tet-pkt-s:packet" { Liu, et al. Expires January 8, 2025 [Page 57] Internet-Draft YANG L3 TE Topology July 2024 description "Augment only for packet TE topology"; } description "Parameters for PSC TE topology."; uses te-packet-types:performance-metrics-attributes-packet { if-feature tet-pkt:te-performance-metric; } uses te-packet-types:performance-metrics-throttle-container-packet { if-feature tet-pkt:te-performance-metric; } } /* Augmentations to te-link-attributes */ augment "/nw-s:networks/tet-s:te/tet-s:templates/" + "tet-s:link-template/tet-s:te-link-attributes" { when "tet-s:interface-switching-capability " + "[tet-s:switching-capability = 'te-types:switching-psc1']" { description "Valid only for PSC"; } description "Parameters for PSC TE topology."; uses te-packet-types:performance-metrics-attributes-packet { if-feature tet-pkt:te-performance-metric; } uses te-packet-types:performance-metrics-throttle-container-packet { if-feature tet-pkt:te-performance-metric; } } augment "/nw-s:networks/nw-s:network/nt-s:link/tet-s:te/" + "tet-s:te-link-attributes" { when "(../../../nw-s:network-types/tet-s:te-topology/" + "tet-pkt-s:packet) and " + "(tet-s:interface-switching-capability " + "[tet-s:switching-capability = " + "'te-types:switching-psc1'])" { description "Valid only for PSC"; } description "Parameters for PSC TE topology."; uses te-packet-types:performance-metrics-attributes-packet { if-feature tet-pkt:te-performance-metric; } Liu, et al. Expires January 8, 2025 [Page 58] Internet-Draft YANG L3 TE Topology July 2024 uses te-packet-types:performance-metrics-throttle-container-packet { if-feature tet-pkt:te-performance-metric; } } augment "/nw-s:networks/nw-s:network/nt-s:link/tet-s:te/" + "tet-s:information-source-entry" { when "(../../../nw-s:network-types/tet-s:te-topology/" + "tet-pkt-s:packet) and " + "(tet-s:interface-switching-capability " + "[tet-s:switching-capability = " + "'te-types:switching-psc1'])" { description "Valid only for PSC"; } description "Parameters for PSC TE topology."; uses te-packet-types:performance-metrics-attributes-packet { if-feature tet-pkt:te-performance-metric; } uses te-packet-types:performance-metrics-throttle-container-packet { if-feature tet-pkt:te-performance-metric; } } /* Augmentations to interface-switching-capability */ augment "/nw-s:networks/tet-s:te/tet-s:templates/" + "tet-s:link-template/tet-s:te-link-attributes/" + "tet-s:interface-switching-capability" { when "tet-s:switching-capability = 'te-types:switching-psc1' " { description "Valid only for PSC"; } description "Parameters for PSC TE topology."; uses tet-pkt:packet-switch-capable-container; } augment "/nw-s:networks/nw-s:network/nt-s:link/tet-s:te/" + "tet-s:te-link-attributes/" + "tet-s:interface-switching-capability" { when "(../../../../nw-s:network-types/tet-s:te-topology/" + "tet-pkt-s:packet) and " + "(tet-s:switching-capability = 'te-types:switching-psc1')" { description "Valid only for PSC"; Liu, et al. Expires January 8, 2025 [Page 59] Internet-Draft YANG L3 TE Topology July 2024 } description "Parameters for PSC TE topology."; uses tet-pkt:packet-switch-capable-container; } augment "/nw-s:networks/nw-s:network/nt-s:link/tet-s:te/" + "tet-s:information-source-entry/" + "tet-s:interface-switching-capability" { when "(../../../../nw-s:network-types/tet-s:te-topology/" + "tet-pkt-s:packet) and " + "(tet-s:switching-capability = 'te-types:switching-psc1')" { description "Valid only for PSC"; } description "Parameters for PSC TE topology."; uses tet-pkt:packet-switch-capable-container; } /* * Augment TE bandwidth */ augment "/nw-s:networks/nw-s:network/nw-s:node/" + "nt-s:termination-point/tet-s:te/" + "tet-s:interface-switching-capability/" + "tet-s:max-lsp-bandwidth/" + "tet-s:te-bandwidth/tet-s:technology" { when "../../../../../../nw-s:network-types/tet-s:te-topology/" + "tet-pkt-s:packet" { description "Augmentation parameters apply only for networks with Packet TE topology type."; } description "Augment maximum LSP TE bandwidth for the link termination point (LTP)."; case packet { uses te-packet-types:te-packet-path-bandwidth; } } augment "/nw-s:networks/nw-s:network/nw-s:node/tet-s:te/" + "tet-s:te-node-attributes/tet-s:connectivity-matrices/" + "tet-s:path-constraints/tet-s:te-bandwidth/" + "tet-s:technology" { when "../../../../../../nw-s:network-types/tet-s:te-topology/" Liu, et al. Expires January 8, 2025 [Page 60] Internet-Draft YANG L3 TE Topology July 2024 + "tet-pkt-s:packet" { description "Augmentation parameters apply only for networks with Packet TE topology type."; } description "Augment TE bandwidth path constraints of the TE node connectivity matrices."; case packet { uses te-packet-types:te-packet-link-bandwidth; } } augment "/nw-s:networks/nw-s:network/nw-s:node/tet-s:te/" + "tet-s:te-node-attributes/tet-s:connectivity-matrices/" + "tet-s:connectivity-matrix/" + "tet-s:path-constraints/tet-s:te-bandwidth/" + "tet-s:technology" { when "../../../../../../../nw-s:network-types/tet-s:te-topology/" + "tet-pkt-s:packet" { description "Augmentation parameters apply only for networks with Packet TE topology type."; } description "Augment TE bandwidth path constraints of the connectivity matrix entry."; case packet { uses te-packet-types:te-packet-link-bandwidth; } } augment "/nw-s:networks/nw-s:network/nw-s:node/tet-s:te/" + "tet-s:information-source-entry/" + "tet-s:connectivity-matrices/tet-s:path-constraints/" + "tet-s:te-bandwidth/tet-s:technology" { when "../../../../../../nw-s:network-types/tet-s:te-topology/" + "tet-pkt-s:packet" { description "Augmentation parameters apply only for networks with Packet TE topology type."; } description "Augment TE bandwidth path constraints of the TE node connectivity matrices information source."; case packet { uses te-packet-types:te-packet-link-bandwidth; } Liu, et al. Expires January 8, 2025 [Page 61] Internet-Draft YANG L3 TE Topology July 2024 } augment "/nw-s:networks/nw-s:network/nw-s:node/tet-s:te/" + "tet-s:information-source-entry/" + "tet-s:connectivity-matrices/tet-s:connectivity-matrix/" + "tet-s:path-constraints/tet-s:te-bandwidth/" + "tet-s:technology" { when "../../../../../../../nw-s:network-types/tet-s:te-topology/" + "tet-pkt-s:packet" { description "Augmentation parameters apply only for networks with Packet TE topology type."; } description "Augment TE bandwidth path constraints of the connectivity matrix entry information source"; case packet { uses te-packet-types:te-packet-link-bandwidth; } } augment "/nw-s:networks/nw-s:network/nw-s:node/tet-s:te/" + "tet-s:tunnel-termination-point/" + "tet-s:client-layer-adaptation/tet-s:switching-capability/" + "tet-s:te-bandwidth/tet-s:technology" { when "../../../../../../nw-s:network-types/tet-s:te-topology/" + "tet-pkt-s:packet" { description "Augmentation parameters apply only for networks with Packet TE topology type."; } description "Augment client TE bandwidth of the tunnel termination point (TTP)"; case packet { uses te-packet-types:te-packet-link-bandwidth; } } augment "/nw-s:networks/nw-s:network/nw-s:node/tet-s:te/" + "tet-s:tunnel-termination-point/" + "tet-s:local-link-connectivities/tet-s:path-constraints/" + "tet-s:te-bandwidth/tet-s:technology" { when "../../../../../../nw-s:network-types/tet-s:te-topology/" + "tet-pkt-s:packet" { description "Augmentation parameters apply only for networks with Packet TE topology type."; Liu, et al. Expires January 8, 2025 [Page 62] Internet-Draft YANG L3 TE Topology July 2024 } description "Augment TE bandwidth path constraints for the TTP Local Link Connectivities."; case packet { uses te-packet-types:te-packet-link-bandwidth; } } augment "/nw-s:networks/nw-s:network/nw-s:node/tet-s:te/" + "tet-s:tunnel-termination-point/" + "tet-s:local-link-connectivities/" + "tet-s:local-link-connectivity/tet-s:path-constraints/" + "tet-s:te-bandwidth/tet-s:technology" { when "../../../../../../../nw-s:network-types/tet-s:te-topology/" + "tet-pkt-s:packet" { description "Augmentation parameters apply only for networks with Packet TE topology type."; } description "Augment TE bandwidth path constraints for the TTP Local Link Connectivity entry."; case packet { uses te-packet-types:te-packet-link-bandwidth; } } augment "/nw-s:networks/nw-s:network/nt-s:link/tet-s:te/" + "tet-s:te-link-attributes/" + "tet-s:interface-switching-capability/" + "tet-s:max-lsp-bandwidth/" + "tet-s:te-bandwidth/tet-s:technology" { when "../../../../../../nw-s:network-types/tet-s:te-topology/" + "tet-pkt-s:packet" { description "Augmentation parameters apply only for networks with Packet TE topology type."; } description "Augment maximum LSP TE bandwidth for the TE link."; case packet { uses te-packet-types:te-packet-path-bandwidth; } } augment "/nw-s:networks/nw-s:network/nt-s:link/tet-s:te/" + "tet-s:te-link-attributes/" Liu, et al. Expires January 8, 2025 [Page 63] Internet-Draft YANG L3 TE Topology July 2024 + "tet-s:max-link-bandwidth/" + "tet-s:te-bandwidth/tet-s:technology" { when "../../../../../nw-s:network-types/tet-s:te-topology/" + "tet-pkt-s:packet" { description "Augmentation parameters apply only for networks with Packet TE topology type."; } description "Augment maximum TE bandwidth for the TE link"; case packet { uses te-packet-types:te-packet-link-bandwidth; } } augment "/nw-s:networks/nw-s:network/nt-s:link/tet-s:te/" + "tet-s:te-link-attributes/" + "tet-s:max-resv-link-bandwidth/" + "tet-s:te-bandwidth/tet-s:technology" { when "../../../../../nw-s:network-types/tet-s:te-topology/" + "tet-pkt-s:packet" { description "Augmentation parameters apply only for networks with Packet TE topology type."; } description "Augment maximum reservable TE bandwidth for the TE link"; case packet { uses te-packet-types:te-packet-link-bandwidth; } } augment "/nw-s:networks/nw-s:network/nt-s:link/tet-s:te/" + "tet-s:te-link-attributes/" + "tet-s:unreserved-bandwidth/" + "tet-s:te-bandwidth/tet-s:technology" { when "../../../../../nw-s:network-types/tet-s:te-topology/" + "tet-pkt-s:packet" { description "Augmentation parameters apply only for networks with Packet TE topology type."; } description "Augment unreserved TE bandwidth for the TE Link"; case packet { uses te-packet-types:te-packet-link-bandwidth; } } Liu, et al. Expires January 8, 2025 [Page 64] Internet-Draft YANG L3 TE Topology July 2024 augment "/nw-s:networks/nw-s:network/nt-s:link/tet-s:te/" + "tet-s:information-source-entry/" + "tet-s:interface-switching-capability/" + "tet-s:max-lsp-bandwidth/" + "tet-s:te-bandwidth/tet-s:technology" { when "../../../../../../nw-s:network-types/tet-s:te-topology/" + "tet-pkt-s:packet" { description "Augmentation parameters apply only for networks with Packet TE topology type."; } description "Augment maximum LSP TE bandwidth for the TE link information source"; case packet { uses te-packet-types:te-packet-path-bandwidth; } } augment "/nw-s:networks/nw-s:network/nt-s:link/tet-s:te/" + "tet-s:information-source-entry/" + "tet-s:max-link-bandwidth/" + "tet-s:te-bandwidth/tet-s:technology" { when "../../../../../nw-s:network-types/tet-s:te-topology/" + "tet-pkt-s:packet" { description "Augmentation parameters apply only for networks with Packet TE topology type."; } description "Augment maximum TE bandwidth for the TE link information source"; case packet { uses te-packet-types:te-packet-link-bandwidth; } } augment "/nw-s:networks/nw-s:network/nt-s:link/tet-s:te/" + "tet-s:information-source-entry/" + "tet-s:max-resv-link-bandwidth/" + "tet-s:te-bandwidth/tet-s:technology" { when "../../../../../nw-s:network-types/tet-s:te-topology/" + "tet-pkt-s:packet" { description "Augmentation parameters apply only for networks with Packet TE topology type."; } description Liu, et al. Expires January 8, 2025 [Page 65] Internet-Draft YANG L3 TE Topology July 2024 "Augment maximum reservable TE bandwidth for the TE link information-source"; case packet { uses te-packet-types:te-packet-link-bandwidth; } } augment "/nw-s:networks/nw-s:network/nt-s:link/tet-s:te/" + "tet-s:information-source-entry/" + "tet-s:unreserved-bandwidth/" + "tet-s:te-bandwidth/tet-s:technology" { when "../../../../../nw-s:network-types/tet-s:te-topology/" + "tet-pkt-s:packet" { description "Augmentation parameters apply only for networks with Packet TE topology type."; } description "Augment unreserved TE bandwidth of the TE link information source"; case packet { uses te-packet-types:te-packet-link-bandwidth; } } augment "/nw-s:networks/tet-s:te/tet-s:templates/" + "tet-s:link-template/tet-s:te-link-attributes/" + "tet-s:interface-switching-capability/" + "tet-s:max-lsp-bandwidth/" + "tet-s:te-bandwidth/tet-s:technology" { description "Augment maximum LSP TE bandwidth of the TE link template"; case packet { uses te-packet-types:te-packet-path-bandwidth; } } augment "/nw-s:networks/tet-s:te/tet-s:templates/" + "tet-s:link-template/tet-s:te-link-attributes/" + "tet-s:max-link-bandwidth/" + "tet-s:te-bandwidth/tet-s:technology" { description "Augment maximum TE bandwidth the TE link template"; case packet { uses te-packet-types:te-packet-link-bandwidth; } } Liu, et al. Expires January 8, 2025 [Page 66] Internet-Draft YANG L3 TE Topology July 2024 augment "/nw-s:networks/tet-s:te/tet-s:templates/" + "tet-s:link-template/tet-s:te-link-attributes/" + "tet-s:max-resv-link-bandwidth/" + "tet-s:te-bandwidth/tet-s:technology" { description "Augment maximum reservable TE bandwidth for the TE link template."; case packet { uses te-packet-types:te-packet-link-bandwidth; } } augment "/nw-s:networks/tet-s:te/tet-s:templates/" + "tet-s:link-template/tet-s:te-link-attributes/" + "tet-s:unreserved-bandwidth/" + "tet-s:te-bandwidth/tet-s:technology" { description "Augment unreserved TE bandwidth the TE link template"; case packet { uses te-packet-types:te-packet-link-bandwidth; } } } Appendix B. Data Tree Example This section contains an example of an instance data tree in the JSON encoding [RFC7951]. The example instantiates "ietf-l3-te-topology" for the topology that is depicted in the following diagram. Liu, et al. Expires January 8, 2025 [Page 67] Internet-Draft YANG L3 TE Topology July 2024 +------------+ +------------+ | D1 | | D2 | /-\ /-\ (TE) /-\ /-\ | | 1-0-1 | |---------------->| | 2-1-1 | | | | 1-2-1 | |<----------------| | 2-0-1 | | \-/ 1-3-1 \-/ (TE) \-/ 2-3-1 \-/ | /----\ | | /----\ | +---| |---+ +---| |---+ \----/ \----/ A | A | (TE)| |(TE) (Non-TE)| |(Non-TE) | | | | | | +------------+ | | | | | D3 | | | | | /-\ /-\ | | | +----->| | 3-1-1 | |-------+ | +---------| | 3-2-1 | |<---------+ \-/ \-/ | | +------------+ The corresponding instance data tree is depicted below. Note that some lines have been wrapped to adhere to the 72-character line limitation of RFCs. { "ietf-network:networks": { "network": [ { "network-id":"example-topo-te", "network-types": { "ietf-te-topology:te-topology": { } }, "ietf-te-topology:te-topology-identifier": { "provider-id":200, "client-id":300, "topology-id":"example-topo-te" }, "ietf-te-topology:te": { }, "node": [ { "node-id":"D1", "ietf-te-topology:te-node-id":"2.0.1.1", "ietf-te-topology:te": { "te-node-attributes": { Liu, et al. Expires January 8, 2025 [Page 68] Internet-Draft YANG L3 TE Topology July 2024 } }, "ietf-network-topology:termination-point": [ { "tp-id":"1-2-1", "ietf-te-topology:te-tp-id":10201, "ietf-te-topology:te": { "interface-switching-capability": [ { "switching-capability": "ietf-te-types:switching-psc1", "encoding": "ietf-te-types:lsp-encoding-ethernet" } ] } }, { "tp-id": "1-3-1", "ietf-te-topology:te-tp-id":10301, "ietf-te-topology:te": { "interface-switching-capability": [ { "switching-capability": "ietf-te-types:switching-psc1", "encoding": "ietf-te-types:lsp-encoding-ethernet" } ] } } ] }, { "node-id":"D2", "ietf-te-topology:te-node-id":"2.0.2.1", "ietf-te-topology:te": { "te-node-attributes": { } }, "ietf-network-topology:termination-point": [ { "tp-id":"2-1-1", "ietf-te-topology:te-tp-id":20101, "ietf-te-topology:te": { "interface-switching-capability": [ { "switching-capability": Liu, et al. Expires January 8, 2025 [Page 69] Internet-Draft YANG L3 TE Topology July 2024 "ietf-te-types:switching-psc1", "encoding": "ietf-te-types:lsp-encoding-ethernet" } ] } } ] }, { "node-id":"D3", "ietf-te-topology:te-node-id":"2.0.3.1", "ietf-te-topology:te": { "te-node-attributes": { } }, "ietf-network-topology:termination-point": [ { "tp-id":"3-1-1", "ietf-te-topology:te-tp-id":30101, "ietf-te-topology:te": { "interface-switching-capability": [ { "switching-capability": "ietf-te-types:switching-psc1", "encoding": "ietf-te-types:lsp-encoding-ethernet" } ] } } ] } ], "ietf-network-topology:link": [ { "link-id":"D1,1-2-1,D2,2-1-1", "source": { "source-node":"D1", "source-tp":"1-2-1" }, "destination": { "dest-node":"D2", "dest-tp":"2-1-1" }, "ietf-te-topology:te": { "te-link-attributes": { "interface-switching-capability": [ Liu, et al. Expires January 8, 2025 [Page 70] Internet-Draft YANG L3 TE Topology July 2024 { "switching-capability": "ietf-te-types:switching-psc1", "encoding":"ietf-te-types:lsp-encoding-ethernet" } ], "max-link-bandwidth": { "te-bandwidth": { "generic":"0x1p+18" } }, "te-default-metric":100 } } }, { "link-id":"D2,2-1-1,D1,1-2-1", "source": { "source-node":"D2", "source-tp":"2-1-1" }, "destination": { "dest-node":"D1", "dest-tp":"1-2-1" }, "ietf-te-topology:te": { "te-link-attributes": { "interface-switching-capability": [ { "switching-capability": "ietf-te-types:switching-psc1", "encoding":"ietf-te-types:lsp-encoding-ethernet" } ], "max-link-bandwidth": { "te-bandwidth": { "generic":"0x1p+18" } }, "te-default-metric":100 } } }, { "link-id":"D1,1-3-1,D3,3-1-1", "source": { "source-node":"D1", "source-tp":"1-3-1" Liu, et al. Expires January 8, 2025 [Page 71] Internet-Draft YANG L3 TE Topology July 2024 }, "destination": { "dest-node":"D3", "dest-tp":"3-1-1" }, "ietf-te-topology:te": { "te-link-attributes": { "interface-switching-capability": [ { "switching-capability": "ietf-te-types:switching-psc1", "encoding":"ietf-te-types:lsp-encoding-ethernet" } ], "max-link-bandwidth": { "te-bandwidth": { "generic":"0x1p+18" } }, "te-default-metric":100 } } }, { "link-id":"D3,3-1-1,D1,1-3-1", "source": { "source-node":"D3", "source-tp":"3-1-1" }, "destination": { "dest-node":"D1", "dest-tp":"1-3-1" }, "ietf-te-topology:te": { "te-link-attributes": { "interface-switching-capability": [ { "switching-capability": "ietf-te-types:switching-psc1", "encoding":"ietf-te-types:lsp-encoding-ethernet" } ], "max-link-bandwidth": { "te-bandwidth": { "generic":"0x1p+18" } }, "te-default-metric":100 Liu, et al. Expires January 8, 2025 [Page 72] Internet-Draft YANG L3 TE Topology July 2024 } } } ] }, { "network-id":"example-topo-l3-te", "network-types": { "ietf-l3-unicast-topology:l3-unicast-topology": { "ietf-l3-te-topology:l3-te": { } } }, "ietf-l3-unicast-topology:l3-topology-attributes": { "ietf-l3-te-topology:l3-te-topology-attributes": { "network-ref":"example-topo-te" } }, "node": [ { "node-id":"D1", "ietf-l3-unicast-topology:l3-node-attributes": { "router-id": [ "203.0.113.1" ], "prefix": [ { "prefix":"203.0.113.1/32" } ], "ietf-l3-te-topology:l3-te-node-attributes": { "node-ref":"D1", "network-ref":"example-topo-te" } }, "ietf-network-topology:termination-point": [ { "tp-id":"1-0-1", "ietf-l3-unicast-topology:l3-termination-point-attributes": { "unnumbered-id":101 } }, { "tp-id":"1-2-1", "ietf-l3-unicast-topology:l3-termination-point-attributes": { "unnumbered-id":121, "ietf-l3-te-topology:l3-te-tp-attributes": { "network-ref":"example-topo-te", Liu, et al. Expires January 8, 2025 [Page 73] Internet-Draft YANG L3 TE Topology July 2024 "tp-ref":"1-2-1" } } }, { "tp-id":"1-3-1", "ietf-l3-unicast-topology:l3-termination-point-attributes": { "unnumbered-id":131, "ietf-l3-te-topology:l3-te-tp-attributes": { "network-ref":"example-topo-te", "tp-ref":"1-3-1" } } } ] }, { "node-id":"D2", "ietf-l3-unicast-topology:l3-node-attributes": { "router-id": [ "203.0.113.2" ], "prefix": [ { "prefix":"203.0.113.2/32" } ], "ietf-l3-te-topology:l3-te-node-attributes": { "node-ref":"D2", "network-ref":"example-topo-te" } }, "ietf-network-topology:termination-point": [ { "tp-id":"2-0-1", "ietf-l3-unicast-topology:l3-termination-point-attributes": { "unnumbered-id":201 } }, { "tp-id":"2-1-1", "ietf-l3-unicast-topology:l3-termination-point-attributes": { "unnumbered-id":211, "ietf-l3-te-topology:l3-te-tp-attributes": { "tp-ref":"2-1-1", "network-ref":"example-topo-te" } } Liu, et al. Expires January 8, 2025 [Page 74] Internet-Draft YANG L3 TE Topology July 2024 }, { "tp-id":"2-3-1", "ietf-l3-unicast-topology:l3-termination-point-attributes": { "unnumbered-id":231 } } ] }, { "node-id":"D3", "ietf-l3-unicast-topology:l3-node-attributes": { "router-id": [ "203.0.113.3" ], "prefix": [ { "prefix":"203.0.113.3/32" } ], "ietf-l3-te-topology:l3-te-node-attributes": { "node-ref":"D3", "network-ref":"example-topo-te" } }, "ietf-network-topology:termination-point": [ { "tp-id":"3-0-1", "ietf-l3-unicast-topology:l3-termination-point-attributes": { "unnumbered-id":301 } }, { "tp-id":"3-1-1", "ietf-l3-unicast-topology:l3-termination-point-attributes": { "unnumbered-id":311, "ietf-l3-te-topology:l3-te-tp-attributes": { "tp-ref":"3-1-1", "network-ref":"example-topo-te" } } }, { "tp-id":"3-2-1", "ietf-l3-unicast-topology:l3-termination-point-attributes": { "unnumbered-id":321 } } Liu, et al. Expires January 8, 2025 [Page 75] Internet-Draft YANG L3 TE Topology July 2024 ] } ], "ietf-network-topology:link": [ { "link-id":"D1,1-2-1,D2,2-1-1", "source": { "source-node":"D1", "source-tp":"1-2-1" }, "destination": { "dest-node":"D2", "dest-tp":"2-1-1" }, "ietf-l3-unicast-topology:l3-link-attributes": { "metric1":"100", "ietf-l3-te-topology:l3-te-link-attributes": { "link-ref":"D1,1-2-1,D2,2-1-1", "network-ref":"example-topo-te" } } }, { "link-id":"D2,2-1-1,D1,1-2-1", "source": { "source-node":"D2", "source-tp":"2-1-1" }, "destination": { "dest-node":"D1", "dest-tp":"1-2-1" }, "ietf-l3-unicast-topology:l3-link-attributes": { "metric1":"100", "ietf-l3-te-topology:l3-te-link-attributes": { "link-ref":"D2,2-1-1,D1,1-2-1", "network-ref":"example-topo-te" } } }, { "link-id":"D1,1-3-1,D3,3-1-1", "source": { "source-node":"D1", "source-tp":"1-3-1" }, "destination": { "dest-node":"D3", Liu, et al. Expires January 8, 2025 [Page 76] Internet-Draft YANG L3 TE Topology July 2024 "dest-tp":"3-1-1" }, "ietf-l3-unicast-topology:l3-link-attributes": { "metric1":"100", "ietf-l3-te-topology:l3-te-link-attributes": { "link-ref":"D1,1-3-1,D3,3-1-1", "network-ref":"example-topo-te" } } }, { "link-id":"D3,3-1-1,D1,1-3-1", "source": { "source-node":"D3", "source-tp":"3-1-1" }, "destination": { "dest-node":"D1", "dest-tp":"1-3-1" }, "ietf-l3-unicast-topology:l3-link-attributes": { "metric1":"100", "ietf-l3-te-topology:l3-te-link-attributes": { "link-ref":"D3,3-1-1,D1,1-3-1", "network-ref":"example-topo-te" } } }, { "link-id":"D2,2-3-1,D3,3-2-1", "source": { "source-node":"D2", "source-tp":"2-3-1" }, "destination": { "dest-node":"D3", "dest-tp":"3-2-1" }, "ietf-l3-unicast-topology:l3-link-attributes": { "metric1":"100" } }, { "link-id":"D3,3-2-1,D2,2-3-1", "source": { "source-node":"D3", "source-tp":"3-2-1" }, Liu, et al. Expires January 8, 2025 [Page 77] Internet-Draft YANG L3 TE Topology July 2024 "destination": { "dest-node":"D2", "dest-tp":"2-3-1" }, "ietf-l3-unicast-topology:l3-link-attributes": { "metric1":"100" } } ] } ] } } Authors' Addresses Xufeng Liu Alef Edge EMail: xufeng.liu.ietf@gmail.com Igor Bryskin Individual EMail: i_bryskin@yahoo.com Vishnu Pavan Beeram Juniper Networks EMail: vbeeram@juniper.net Tarek Saad Cisco Systems Inc EMail: tsaad.net@gmail.com Himanshu Shah Ciena EMail: hshah@ciena.com Liu, et al. Expires January 8, 2025 [Page 78] Internet-Draft YANG L3 TE Topology July 2024 Oscar Gonzalez de Dios Telefonica EMail: oscar.gonzalezdedios@telefonica.com Liu, et al. Expires January 8, 2025 [Page 79]