Network Working Group B. Wu Internet-Draft D. Dhody Intended status: Standards Track Huawei Technologies Expires: 29 February 2024 V.P. Beeram Juniper Networks T. Saad Cisco Systems S. Peng ZTE Corporation 28 August 2023 A YANG Data Model for Network Resource Partitions (NRPs) draft-wdbsp-teas-nrp-yang-02 Abstract A Network Resource Partition (NRP) is a collection of resources identified in the underlay network to support services (like IETF Network Slices) that need logical network structures with required Service Level Objective (SLO) and Service Level Expectation (SLE) characteristics to be created. This document defines a YANG data model for Network Resource Partitions (NRPs). The model can be used, in particular, for the realization of the IETF Network Slice Services in IP/MPLS networks. 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 29 February 2024. Copyright Notice Copyright (c) 2023 IETF Trust and the persons identified as the document authors. All rights reserved. Wu, et al. Expires 29 February 2024 [Page 1] Internet-Draft NRPs YANG August 2023 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 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 Revised BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Revised BSD License. Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2 2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 3 3. NRPs Data Model . . . . . . . . . . . . . . . . . . . . . . . 3 3.1. NRPs Instantiation . . . . . . . . . . . . . . . . . . . 4 3.1.1. Resource Reservation . . . . . . . . . . . . . . . . 5 3.1.2. NRP Selector . . . . . . . . . . . . . . . . . . . . 6 3.1.3. NRP Topology . . . . . . . . . . . . . . . . . . . . 6 3.2. NRPs monitoring . . . . . . . . . . . . . . . . . . . . . 8 3.3. NRPs Device Model Description . . . . . . . . . . . . . . 9 4. NRPs Yang Module . . . . . . . . . . . . . . . . . . . . . . 10 5. NRPs Device YANG module . . . . . . . . . . . . . . . . . . . 25 6. Security Considerations . . . . . . . . . . . . . . . . . . . 28 7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 28 8. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 29 9. Contributor . . . . . . . . . . . . . . . . . . . . . . . . . 29 10. References . . . . . . . . . . . . . . . . . . . . . . . . . 30 10.1. Normative References . . . . . . . . . . . . . . . . . . 30 10.2. Informative References . . . . . . . . . . . . . . . . . 32 Appendix A. An Example . . . . . . . . . . . . . . . . . . . . . 34 Appendix B. NRPs YANG Module Tree . . . . . . . . . . . . . . . 37 Appendix C. NRPs Device YANG Module Tree . . . . . . . . . . . . 40 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 41 1. Introduction As specified in Section 7.4 [I-D.ietf-teas-ietf-network-slices], an NRP is a collection of resources identified in the underlay network to support the IETF Network Slice service (or any other service that needs logical network structures with required characteristics to be created). [I-D.ietf-teas-ietf-network-slices] defines a framework for IETF Network Slice Services, which provide connectivity coupled with network resources commitment between a number of Service Demarcation Points (SDPs) over a shared network infrastructure. The IETF Network Slice service is expressed in terms of one or more connectivity constructs, which can be of a connection type (point-to- point (P2P), point-to-multipoint (P2MP), or any-to-any (A2A)) and any combination of these types. One or more connectivity constructs from Wu, et al. Expires 29 February 2024 [Page 2] Internet-Draft NRPs YANG August 2023 one or more IETF Network Slices are mapped to an NRP for ensuring Service Level Objective (SLO) and Service Level Expectation (SLE) and network scalability. This document defines a YANG module of NRPs. An IETF Network Slice Controller (NSC) can use it to manage NRP instances in order to implement Network Slice Services. An NRP Policy [I-D.ietf-teas-ns-ip-mpls] is a policy construct that enables instantiation of mechanisms in support of service specific control and data plane behaviors on select topological elements associated with the NRP.Section 3.1 describes the detailed definition of NRP policy in NRP instantiation. According to the YANG model classification of [RFC8309], the NRPs model is a network configuration model. 2. Terminology The following terms are defined in [RFC6241] and are used in this specification: * configuration data * state data The following terms are defined in [RFC7950] and are used in this specification: * augment * data model * data node The terminology for describing YANG data models is found in [RFC7950]. The tree diagram used in this document follows the notation defined in [RFC8340]. 3. NRPs Data Model There are multiple modes of NRPs operations to be supported as follows: Wu, et al. Expires 29 February 2024 [Page 3] Internet-Draft NRPs YANG August 2023 * NRPs instantiation: Depending on the slice service types and also network status, there can be two types of approaches. One method is to create an NRP instance before the network controller processes the IETF Network Slice service request. Another one is that the network controller may start creating an NRP instance while configuring the IETF Network Slice service request. * NRPs modification: When the capacity of an existing NPR link is close to capacity, the bandwidth of the link could be increased. And when an NRP links or nodes resources are insufficient, new NRP links and nodes could be added. * NRPs Deletion: If the NSC determines that no slice service is using an NRP, the NSC can delete the NRP instance. * NRPs Monitoring: The NSC can use the NRPs model to track and monitor NRPs resource status and usage. 3.1. NRPs Instantiation An NRP policy specifies the rules for determining the topology associated with the NRP and dictates how an NRP can be realized in IP/MPLS networks using one of three partition modes. The NRP policy dictates if the partitioning of the shared network resources can be achieved in (a) just the data plane or in (b) just the control plane or in (c) both the control and data planes. The NRP policy modes (a) and (c) require the forwarding engine on each NRP capable node to identify the traffic belonging to a specific NRP and to apply the corresponding Per-Hop Behavior (PHB) or forwarding mechanism that determines the forwarding treatment of the packets belonging to the NRP. When catering to IETF Network Slices, this NRP identification is referred to as the NRP selector and may comprises of traffic streams from one or more connectivity constructs (belonging to one or more IETF network slices) mapped to a specific NRP. The NRP policy modes (b) and (c) require the distributed/ centralized resource reservation management. 'nrp-policy' is defined to enable NRP Stateful Traffic Engineering (NRP-TE) [I-D.ietf-teas-nrp-scalability][I-D.ietf-teas-ns-ip-mpls] and/or NRP IGP forwarding in IP/MPLS networks. The high-level model structure of NRP policy defined by this document is as shown in Figure 1: Wu, et al. Expires 29 February 2024 [Page 4] Internet-Draft NRPs YANG August 2023 module: ietf-nrp augment /nw:networks: +--rw nrp-policies +--rw nrp-policy* [name] +--rw name string +--rw nrp-id? uint32 +--rw mode? identityref +--rw resource-reservation | ... +--rw selector | ... +--rw phb-profile? string +--rw topology ... Figure 1: NRP Policy subtree high-level structure The 'networks' container from the 'ietf-network' module [RFC8345] provides a placeholder for an inventory of nodes in the network. This container is augmented to carry a set of NRP policies. The 'nrp-policies' container carries a list of NRP policies. Each 'nrp-policy' entry is identified by a name and holds the set of attributes needed to instantiate an NRP. Each entry also carries an 'nrp-id' leaf which uniquely identifies the NRP created by the enforcement of this policy. The description of the 'nrp-policies' data nodes are as follows, and the other key elements of each nrp-policy entry are discussed in the following sub-sections. * 'nrp-id': Is an identifier that is used to uniquely identify an NRP instance within an NSC network scope. * 'mode': Refers to control plane resource partition, data plane resource partition, or a combination of both types. 3.1.1. Resource Reservation The 'resource-reservation' container specifies the bandwidth resource allocated to an NRP instance, or can be overridden by the configuration of the link specific 'resource-reservation' nodes of 'nrp-topology'. Wu, et al. Expires 29 February 2024 [Page 5] Internet-Draft NRPs YANG August 2023 +--rw resource-reservation +--rw (max-bw-type)? +--:(bw-value) | +--rw maximum-bandwidth? uint64 +--:(bw-percentage) +--rw maximum-bandwidth-percent? rt-types:percentage Figure 2: NRP Resource Reservation YANG subtree structure 3.1.2. NRP Selector NRP selector defines the data plane encapsulation types and values that are used to identify NRP-specific network resources. [I-D.ietf-teas-nrp-scalability] discusses several candidate NRP selector encapsulation schemes, including IP, MPLS, or SRv6, for example, the IPv6 Hop-by-Hop extension header defined in [I-D.ietf-6man-enhanced-vpn-vtn-id], or the SRv6 SID defined in [I-D.ietf-spring-sr-for-enhanced-vpn]. Since the MPLS encapsulation schemes are still under discussion, the model only provides a place holder for future updates. Additionally, the use of NRP-specific IP addresses to identify NRP resources, or the use of specific ACLs, are optional NRP selector mechanisms. +--rw selector | +--rw ipv4 | | +--rw destination-prefix* inet:ipv4-prefix | +--rw ipv6 | | +--rw (selector-type)? | | +--:(dedicated) | | | +--rw ipv6-hbh-eh? uint32 | | +--:(srv6-sid-derived) | | | +--rw srv6-sid* inet:ipv6-prefix | | +--:(ipv6-destination-derived) | | +--rw destination-prefix* inet:ipv6-prefix | +--rw mpls | +--rw acl-ref* nrp-acl-ref Figure 3: NRP Selector YANG subtree structure 3.1.3. NRP Topology 'nrp-topology' defines a dedicated NRP topology. Wu, et al. Expires 29 February 2024 [Page 6] Internet-Draft NRPs YANG August 2023 When an NRP support IGP forwarding, the topology of the NRP must be congruent with an IGP instance.The topology used for IGP route computation and forwarding can be derived using Multi-Topology Routing (MTR) or Flex-algo. Multi-Topology Routing (MTR) is defined in [RFC4915], [RFC5120], and [I-D.ietf-lsr-isis-sr-vtn-mt] or Flex- algo is defined in [RFC9350]. Figure 4 shows an example of NRP-1 enabling "igp-congruent", which indicates that this NRP instance uses the same IGP topology with the specified 'multi-topology-id' or 'algo-id'. As illustrated, NRP-1 has different link resource attributes from those of the IGP, but shares the same the nodes and termination point (TPs) of the IGP topology. # O #### O #### O # # # # O # # # # # # # # O #### O #### O NRP-1 || vv O-----O-----O / | | | O | | | \ | | | O-----O-----O IGP Topology (MT or Flex-algo) Legend O Virtual node --- IGP links ### Virtual links with a set of reserved resources Figure 4: IGP Congruency Example The 'selection' container consists of a list of select subset of links of an underlay topology or a pre-built topology. The 'filter' container consists of a list of filters where each entry references a topology filter [I-D.bestbar-teas-yang-topology-filter]. The topological elements that satisfy the membership criteria can optionally override the default resource-reservation and nrp-selector specific leafs. Wu, et al. Expires 29 February 2024 [Page 7] Internet-Draft NRPs YANG August 2023 +--rw topology +--rw igp-congruent! | +--rw multi-topology-id? uint32 | +--rw algo-id? uint32 | +--rw sharing? boolean +--rw (topology-type)? +--:(selection) | +--rw select | +--rw topology-group* [group-id] | +--rw group-id string | +--rw base-topology-ref | | ... | +--rw links* [link-ref] | | ... | +--rw resource-reservation | | ... | +--rw link-partition-type? | | identityref | +--rw phb-profile? string +--:(filter) +--rw filters +--rw filter* [filter-ref] +--rw filter-ref | nrp-topo-filter-ref +--rw resource-reservation | ... +--rw selector | ... +--rw phb-profile? string Figure 5: NRP Topology YANG subtree structure 3.2. NRPs monitoring The NRPs model can be used to track and monitor operational status and resource usage of NRPs. Wu, et al. Expires 29 February 2024 [Page 8] Internet-Draft NRPs YANG August 2023 augment /nw:networks/nw:network/nw:network-types: +--rw nrp! augment /nw:networks/nw:network/nw:node: +--ro nrp +--ro nrp-aware-dp-id ... augment /nw:networks/nw:network/nt:link: +--ro nrp +--ro link-partition-type? identityref +--ro bandwidth-value? uint64 +--ro nrp-aware-dp-id | ... +--ro statistics ... augment /nw:networks/nw:network/nw:node: +--ro nrps* [nrp-id] +--ro nrp-id uint32 +--ro nrp ... augment /nw:networks/nw:network/nt:link: +--ro nrps* [nrp-id] +--ro nrp-id uint32 +--ro link-partition-type? identityref +--ro bandwidth-value? uint64 +--ro nrp-aware-dp-id ... Figure 6: NRPs Monitoring YANG subtree structure 3.3. NRPs Device Model Description The device-specific NRPs model is defined in module 'ietf-nrp-device' as shown in Figure 9, which augments NRPs YANG data model in Figure 8 and adds interface attributes, including resource reservation, NRP selector, and PHB profile, that are specific to an NRP device. Figure below shows the tree diagram of the device NRPs YANG model defined in modules 'ietf-nrp-device.yang'. Wu, et al. Expires 29 February 2024 [Page 9] Internet-Draft NRPs YANG August 2023 module: ietf-nrp-device augment /nw:networks/nrp:nrp-policies/nrp:nrp-policy: +--rw interfaces +--rw interface* [interface] +--rw interface if:interface-ref +--rw resource-reservation | +--rw (max-bw-type)? | +--:(bw-value) | | ... | +--:(bw-percentage) | ... +--rw selector | +--rw ipv4 | | +--rw destination-prefix* inet:ipv4-prefix | +--rw ipv6 | | +--rw (selector-type)? | | ... | +--rw mpls | | +--rw (selector-type)? | | ... | +--rw acl-ref* nrp-acl-ref +--rw phb-profile? string Figure 7: NRPs Device YANG subtree high-level structure 4. NRPs Yang Module The 'ietf-nrp' module uses types defined in [RFC8345], [RFC8294],[RFC8776], [RFC6991], [RFC8519], [I-D.ietf-spring-srv6-yang], and [I-D.bestbar-teas-yang-topology-filter]. file "ietf-nrp@2023-08-28.yang" module ietf-nrp { yang-version 1.1; namespace "urn:ietf:params:xml:ns:yang:ietf-nrp"; prefix nrp; 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"; } Wu, et al. Expires 29 February 2024 [Page 10] Internet-Draft NRPs YANG August 2023 import ietf-routing-types { prefix rt-types; reference "RFC 8294: Common YANG Data Types for the Routing Area"; } import ietf-te-types { prefix te-types; reference "RFC 8776: Traffic Engineering Common YANG Types"; } import ietf-te-packet-types { prefix te-packet-types; reference "RFC 8776: Traffic Engineering Common YANG Types"; } import ietf-inet-types { prefix inet; reference "RFC 6991: Common YANG Data Types"; } import ietf-access-control-list { prefix acl; reference "RFC 8519: YANG Data Model for Network Access Control Lists (ACLs)"; } import ietf-srv6-types { prefix srv6-types; reference "draft-ietf-spring-srv6-yang: YANG Data Model for SRv6 Base and Static"; } import ietf-topology-filter { prefix topo-filt; reference "draft-bestbar-teas-yang-topology-filter: YANG Data Model for Topology Filter"; } organization "IETF Traffic Engineering Architecture and Signaling (TEAS) Working Group"; contact "WG Web: WG List: Editor: Bo Wu Wu, et al. Expires 29 February 2024 [Page 11] Internet-Draft NRPs YANG August 2023 Editor: Dhruv Dhody Editor: Vishnu Pavan Beeram Editor: Tarek Saad Editor: Shaofu Peng "; description "This YANG module defines a data model for Network Resource Partitions (NRPs) managment. Copyright (c) 2023 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 2023-08-28 { description "Initial revision."; reference "RFC XXXX: A YANG Data Model for Network Resource Partitions (NRPs)"; } /* * I D E N T I T I E S */ identity nrp-partition-mode { description "Base identity for NRP partition type."; } identity nrp-control-plane-partition { base nrp-partition-mode; Wu, et al. Expires 29 February 2024 [Page 12] Internet-Draft NRPs YANG August 2023 description "Identity for NRP control plane partition."; } identity nrp-data-plane-partition { base nrp-partition-mode; description "Identity for NRP data plane partition."; } identity nrp-hybrid-plane-partition { base nrp-partition-mode; description "Identity for both control and data planes partitions of NRP."; } identity nrp-link-partition-type { description "Base identity for NRP interface partition type."; } identity virtual-sub-interface-partition { base nrp-link-partition-type; description "Identity for NRP virtual interface or sub-interface partition, e.g. FlexE."; } identity queue-partition { base nrp-link-partition-type; description "Identity for NRP queue partition type."; } /* * T Y P E D E F S */ typedef nrp-acl-ref { type leafref { path "/acl:acls/acl:acl/acl:name"; } description "This type is used to reference an ACL."; } typedef nrp-topo-filter-ref { type leafref { Wu, et al. Expires 29 February 2024 [Page 13] Internet-Draft NRPs YANG August 2023 path "/nw:networks/topo-filt:topology-filters/" + "topo-filt:topology-filter/topo-filt:name"; } description "This type is used to reference a Topology Filter."; reference "draft-bestbar-teas-yang-topology-filter: YANG Data Model for Topology Filter"; } /* * Grouping - NRP Resource Reservation */ grouping nrp-resource-reservation { description "Grouping for NRP resource reservation."; container resource-reservation { description "Container for NRP resource reservation."; choice max-bw-type { description "Choice of maximum bandwidth specification."; case bw-value { leaf maximum-bandwidth { type uint64; units "bits/second"; description "The maximum bandwidth allocated to an NRP - specified as absolute value."; } } case bw-percentage { leaf maximum-bandwidth-percent { type rt-types:percentage; description "The maximum bandwidth allocated to an NRP - specified as percentage of link capacity."; } } } } } /* * Grouping - NRP Selector Configuration */ Wu, et al. Expires 29 February 2024 [Page 14] Internet-Draft NRPs YANG August 2023 grouping nrp-selector-config { description "Grouping for NRP selector configuration."; container selector { description "Container for NRP selector."; container ipv4 { description "Container for IPv4 NRP selector."; leaf-list destination-prefix { type inet:ipv4-prefix; description "Any prefix from the specified set of IPv4 destination prefixes can be the selector."; } } container ipv6 { description "Container for IPv6 NRP selector."; choice selector-type { description "Choices for IPv6 selector type."; case dedicated { leaf ipv6-hbh-eh { type uint32; description "The selector value carried in Hop-by-Hop Option of IPv6 extension header."; reference "draft-ietf-6man-enhanced-vpn-vtn-id: Carrying Virtual Transport Network (VTN) Information in IPv6 Extension Header"; } } case srv6-sid-derived { leaf-list srv6-sid { type srv6-types:srv6-sid; description "Any SID from the specified set of SRv6 SID can be the selector."; reference "draft-ietf-spring-sr-for-enhanced-vpn: Segment Routing based Virtual Transport Network (VTN) for Enhanced VPN"; } } case ipv6-destination-derived { leaf-list destination-prefix { type inet:ipv6-prefix; Wu, et al. Expires 29 February 2024 [Page 15] Internet-Draft NRPs YANG August 2023 description "Any prefix from the specified set of IPv6 destination prefixes can be the selector."; } } } } container mpls { description "Container for MPLS NRP selector. This is a placeholder for future updates based on the MPLS solutions."; } leaf-list acl-ref { type nrp-acl-ref; description "Selection is done based on the specified list of ACLs."; reference "RFC 8519: YANG Data Model for Network Access Control Lists (ACLs)"; } } } /* * Grouping - NRP QoS PHB profile */ grouping nrp-qos-phb-profile { description "Grouping for NRP QoS PHB profile."; leaf phb-profile { type string; description "PHB profile identifier."; } } /* * Grouping - NRP IGP congruent */ grouping nrp-igp-congruent { description "Grouping for NRP IGP congruent attributes."; container igp-congruent { presence "Indicates NRP IGP congruency."; description "The presence of the container node describes NRP IGP Wu, et al. Expires 29 February 2024 [Page 16] Internet-Draft NRPs YANG August 2023 congruent, which indicates that the NRP instance uses the same IGP topology with the specified 'multi-topology-id' and 'algo-id'. That is, the nodes and termination point of the NRP topology and the IGP topology are the same, while the link attributes of the NRP are different from those of the IGP."; leaf multi-topology-id { type uint32; description "Indicates the MT-id of the NRP IGP instance."; reference "RFC 5120: M-ISIS: Multi Topology (MT) Routing in Intermediate System to Intermediate Systems (IS-ISs) RFC 4915: Multi-Topology (MT) Routing in OSPF"; } leaf algo-id { type uint32; description "Indicates the algo-id of the NRP IGP instance."; reference "RFC 9350: IGP Flexible Algorithm"; } leaf sharing { type boolean; default "true"; description "'true' if the the NRP IGP instance can be shared with other NRPs; 'false' if the the NRP IGP instance is dedicated to this NRP."; } } } /* * Grouping - NRP Topology Filter */ grouping nrp-topology-filter { description "Grouping for NRP filter topology."; container filters { description "Container for filters."; list filter { key "filter-ref"; description "List of filters."; leaf filter-ref { Wu, et al. Expires 29 February 2024 [Page 17] Internet-Draft NRPs YANG August 2023 type nrp-topo-filter-ref; description "Reference to a specific topology filter from the list of global topology filters."; } uses nrp-resource-reservation; uses nrp-selector-config; uses nrp-qos-phb-profile; } } } /* * Grouping - NRP Select Topology */ grouping nrp-select-topology { description "NRP topology specified by selection."; container select { description "The container of NRP select topology."; list topology-group { key "group-id"; description "List of groups for NRP topology elements (node or links) that share common attributes."; leaf group-id { type string; description "The NRP topology group identifier."; } container base-topology-ref { description "Container for the base topology reference."; uses nw:network-ref; } list links { key "link-ref"; description "A list of links with common attributes"; leaf link-ref { type leafref { path "/nw:networks/nw:network[nw:network-id=current()" + "/../../base-topology-ref/network-ref]" + "/nt:link/nt:link-id"; } Wu, et al. Expires 29 February 2024 [Page 18] Internet-Draft NRPs YANG August 2023 description "A reference to a link in the base topology."; } } uses nrp-resource-reservation; leaf link-partition-type { type identityref { base nrp-link-partition-type; } description "Indicates the resource reservation type of an NRP link."; } uses nrp-qos-phb-profile; } } } /* * Grouping - NRP Topology */ grouping nrp-topology { description "Grouping for NRP topology."; container topology { description "Container for NRP topology."; uses nrp-igp-congruent; choice topology-type { description "Choice of NRP topology type."; case selection { uses nrp-select-topology; } case filter { uses nrp-topology-filter; } } } } /* * Grouping - NRP Policy */ grouping nrp-pol { description "Grouping for NRP policies."; Wu, et al. Expires 29 February 2024 [Page 19] Internet-Draft NRPs YANG August 2023 container nrp-policies { description "Container for nrp policies."; list nrp-policy { key "name"; unique "nrp-id"; description "List of NRP policies."; leaf name { type string; description "A string that uniquely identifies the NRP policy."; } leaf nrp-id { type uint32; description "A 32-bit ID that uniquely identifies the NRP created by the enforcement of this NRP policy."; } leaf mode { type identityref { base nrp-partition-mode; } default "nrp-hybrid-plane-partition"; description "Indicates the resource partition mode of the NRP, such as control plane partition, data plane partition, or hybrid partition."; } uses nrp-resource-reservation; uses nrp-selector-config; uses nrp-qos-phb-profile; uses nrp-topology; } } } /* * Grouping - NRP Selector State */ grouping nrp-selector-state { description "The grouping of NRP selector."; container selector { config false; description "The container of NRP selector."; Wu, et al. Expires 29 February 2024 [Page 20] Internet-Draft NRPs YANG August 2023 leaf srv6 { type srv6-types:srv6-sid; description "Indicates the SRv6 SID value as the NRP selector."; } } } /* * Grouping - NRP node attributes */ grouping nrp-node-attributes { description "NRP node scope attributes."; container nrp { config false; description "Containing NRP attributes."; uses nrp-selector-state; } } /* * Grouping - NRP Link Attributes */ grouping nrp-link-attributes { description "NRP link scope attributes."; leaf link-partition-type { type identityref { base nrp-link-partition-type; } config false; description "Indicates the resource partition type of an NRP link."; } leaf bandwidth-value { type uint64; units "bits/second"; config false; description "Bandwidth allocation for the NRP as absolute value."; } uses nrp-selector-state; } Wu, et al. Expires 29 February 2024 [Page 21] Internet-Draft NRPs YANG August 2023 /* * Grouping - NRP Bandwidth Metrics */ grouping nrp-bandwidth-metrics { description "Grouping for NRP bandwidth metrics."; leaf one-way-available-bandwidth { type uint64; units "bits/second"; description "Available bandwidth that is defined to be NRP link bandwidth minus bandwidth utilization.."; } leaf one-way-utilized-bandwidth { type uint64; units "bits/second"; description "Bandwidth utilization that represents the actual utilization of the link (i.e. as measured in the router)."; } } // nrp-link-statistics grouping nrp-statistics-per-link { description "Statistics attributes per NRP link."; container statistics { config false; description "Statistics for NRP link."; leaf admin-status { type te-types:te-admin-status; description "The administrative state of the link."; } leaf oper-status { type te-types:te-oper-status; description "The current operational state of the link."; } uses nrp-bandwidth-metrics; uses te-packet-types:one-way-performance-metrics-packet; } } // nrp-network-type Wu, et al. Expires 29 February 2024 [Page 22] Internet-Draft NRPs YANG August 2023 grouping nrp-network-type { description "Identifies the network type to be NRP."; container nrp { presence "Indicates NRP network topology."; description "The presence of the container node indicates NRP network."; } } /* * Augment - Network Resource Partition Policies. */ augment "/nw:networks" { description "Augment networks with NRP policies."; uses nrp-pol; } /* * Augment - NRP type. */ augment "/nw:networks/nw:network/nw:network-types" { description "Indicates the network type of NRP"; uses nrp-network-type; } /* * Augment - NRP node operational status. */ augment "/nw:networks/nw:network/nw:node" { when '../nw:network-types/nrp:nrp' { description "Augment only for NRP network topology."; } description "Augment node configuration and state."; uses nrp-node-attributes; } /* * Augment - NRP link operational status. */ Wu, et al. Expires 29 February 2024 [Page 23] Internet-Draft NRPs YANG August 2023 augment "/nw:networks/nw:network/nt:link" { when '../nw:network-types/nrp:nrp' { description "Augment only for NRP network topology."; } description "Augment link configuration and state."; container nrp { config false; description "Containing NRP attributes."; uses nrp-link-attributes; uses nrp-statistics-per-link; } } /* * Augment - Native topology with NRPs node operational status. */ augment "/nw:networks/nw:network/nw:node" { description "Augment node with NRPs aware attributes."; list nrps { key "nrp-id"; config false; description "List of NRPs."; leaf nrp-id { type uint32; description "NRP identifier"; } uses nrp-node-attributes; } } /* * Augment - Native topology with NRPs link operational status. */ augment "/nw:networks/nw:network/nt:link" { description "Augment link with NRPs aware attributes."; list nrps { key "nrp-id"; config false; description Wu, et al. Expires 29 February 2024 [Page 24] Internet-Draft NRPs YANG August 2023 "List of NRPs."; leaf nrp-id { type uint32; description "NRP identifier"; } uses nrp-link-attributes; } } } Figure 8: NRPs data model YANG module 5. NRPs Device YANG module The device NRPs YANG module ('ietf-nrp-device') models augments the NRPs YANG module ('ietf-nrp') and adds the attributes of NRP interfaces that are local to an NRP device. The device NRPs YANG module imports the following module(s): ietf- interfaces defined in [RFC8343], ietf-network defined in [RFC8345], and grouping defined in this document. file "ietf-nrp-device@2023-08-28.yang" module ietf-nrp-device { yang-version 1.1; namespace "urn:ietf:params:xml:ns:yang:ietf-nrp-device"; prefix nrp-dev; /* Import IETF Network module */ import ietf-network { prefix nw; reference "RFC 8345: RFC 8345: A YANG Data Model for Network Topologies"; } /* Import IETF interface module */ import ietf-interfaces { prefix if; reference "RFC8343: A YANG Data Model for Interface Management"; } /* Import NRPs module */ Wu, et al. Expires 29 February 2024 [Page 25] Internet-Draft NRPs YANG August 2023 import ietf-nrp { prefix nrp; reference "RFCXXXX: A YANG Data Model for Network Resource Partitions (NRPs)"; } organization "IETF Traffic Engineering Architecture and Signaling (TEAS) Working Group"; contact "WG Web: WG List: Editor: Bo Wu Editor: Dhruv Dhody Editor: Vishnu Pavan Beeram Editor: Tarek Saad Editor: Shaofu Peng "; description "This YANG module defines a data model for Network Resource Partitions (NRPs) device configurations and states. The model fully conforms to the Network Management Datastore Architecture (NMDA). Copyright (c) 2023 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."; Wu, et al. Expires 29 February 2024 [Page 26] Internet-Draft NRPs YANG August 2023 // RFC Ed.: replace XXXX with actual RFC number and remove this // note. // RFC Ed.: update the date below with the date of RFC publication // and remove this note. revision 2023-08-28 { description "Initial revision."; reference "RFCXXXX: A YANG Data Model for Network Resource Partitions (NRPs) Device"; } /* NRP device configuraiton */ augment "/nw:networks/nrp:nrp-policies/nrp:nrp-policy" { description "NRP policy list."; /* NRP Interface Configuration Data */ container interfaces { description "Configuration data model for NRP interfaces."; list interface { key "interface"; description "NRP interfaces."; leaf interface { type if:interface-ref; description "NRP interface name."; } uses nrp:nrp-resource-reservation; uses nrp:nrp-selector-config; uses nrp:nrp-qos-phb-profile; } } } } Figure 9: NRPs Device data model YANG module Wu, et al. Expires 29 February 2024 [Page 27] Internet-Draft NRPs YANG August 2023 6. Security Considerations The YANG model defined in this document is designed to be accessed via network management protocols such as NETCONF [RFC6241] or RESTCONF [RFC8040]. The lowest NETCONF layer is the secure transport layer, and the mandatory-to-implement secure transport is Secure Shell (SSH) [RFC6242]. The lowest RESTCONF layer is HTTPS, and the mandatory-to-implement secure transport is TLS [RFC8446]. The NETCONF access control model [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 model 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. nrp-link: A malicious client could attempt to remove a link from a topology, add a new link. In each case, the structure of the topology would be sabotaged, and this scenario could, for example, result in an NRP topology that is less than optimal. The entries in the nodes above include the whole network configurations corresponding with the NRP, and indirectly create or modify the PE or P device configurations. Unexpected changes to these entries could lead to service disruption and/or network misbehavior. 7. IANA Considerations This document registers a URI in the IETF XML registry [RFC3688]. Following the format in [RFC3688], the following registration is requested to be made: URI: urn:ietf:params:xml:ns:yang:ietf-nrp Registrant Contact: The IESG. XML: N/A, the requested URI is an XML namespace. URI: urn:ietf:params:xml:ns:yang:ietf-nrp-device Registrant Contact: The IESG. XML: N/A, the requested URI is an XML namespace. This document requests to register a YANG module in the YANG Module Names registry [RFC7950]. Wu, et al. Expires 29 February 2024 [Page 28] Internet-Draft NRPs YANG August 2023 Name: ietf-nrp Namespace: urn:ietf:params:xml:ns:yang:ietf-nrp Maintained by IANA: N Prefix: nrp Reference: RFC XXXX Name: ietf-nrp-device Namespace: urn:ietf:params:xml:ns:yang:ietf-nrp-device Maintained by IANA: N Prefix: nrp-dev Reference: RFC XXXX 8. Acknowledgments The authors would like to thank Krzysztof Szarkowicz, Jie Dong, Qin Wu, Yao Zhao, Zhenbing Li, Ying Cheng, Liyan Gong, and many others for their helpful comments and suggestions. 9. Contributor The following individuals, authors of [I-D.bestbar-teas-yang-nrp-policy] and [I-D.wd-teas-nrp-yang], contributed to this consolidated document: Wu, et al. Expires 29 February 2024 [Page 29] Internet-Draft NRPs YANG August 2023 Xufeng Liu IBM Corporation Email: xufeng.liu.ietf@gmail.com Mohamed Boucadair Orange Email: mohamed.boucadair@orange.com Daniele Ceccarelli Bin Wen Comcast Email: Bin_Wen@cable.comcast.com Ran Chen ZTE Corporation Email: chen.ran@zte.com.cn Luis M. Contreras Telefonica Email: luismiguel.contrerasmurillo@telefonica.com Ying Cheng China Unicom Email: chengying10@chinaunicom.cn Liyan Gong China Mobile Email: gongliyan@chinamobile.com 10. References 10.1. Normative References [I-D.bestbar-teas-yang-topology-filter] Beeram, V. P., Saad, T., Gandhi, R., and X. Liu, "YANG Data Model for Topology Filter", Work in Progress, Internet-Draft, draft-bestbar-teas-yang-topology-filter- 04, 24 October 2022, . Wu, et al. Expires 29 February 2024 [Page 30] Internet-Draft NRPs YANG August 2023 [I-D.ietf-6man-enhanced-vpn-vtn-id] Dong, J., Li, Z., Xie, C., Ma, C., and G. S. Mishra, "Carrying Virtual Transport Network (VTN) Information in IPv6 Extension Header", Work in Progress, Internet-Draft, draft-ietf-6man-enhanced-vpn-vtn-id-05, 6 July 2023, . [I-D.ietf-spring-srv6-yang] Raza, S., Agarwal, S., Liu, X., Hu, Z., Hussain, I., Shah, H. C., Voyer, D., Matsushima, S., Horiba, K., Rajamanickam, J., and A. Abdelsalam, "YANG Data Model for SRv6 Base and Static", Work in Progress, Internet-Draft, draft-ietf-spring-srv6-yang-02, 23 September 2022, . [RFC3688] Mealling, M., "The IETF XML Registry", BCP 81, RFC 3688, DOI 10.17487/RFC3688, January 2004, . [RFC4915] Psenak, P., Mirtorabi, S., Roy, A., Nguyen, L., and P. Pillay-Esnault, "Multi-Topology (MT) Routing in OSPF", RFC 4915, DOI 10.17487/RFC4915, June 2007, . [RFC5120] Przygienda, T., Shen, N., and N. Sheth, "M-ISIS: Multi Topology (MT) Routing in Intermediate System to Intermediate Systems (IS-ISs)", RFC 5120, DOI 10.17487/RFC5120, February 2008, . [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, . [RFC6991] Schoenwaelder, J., Ed., "Common YANG Data Types", RFC 6991, DOI 10.17487/RFC6991, July 2013, . [RFC7950] Bjorklund, M., Ed., "The YANG 1.1 Data Modeling Language", RFC 7950, DOI 10.17487/RFC7950, August 2016, . Wu, et al. Expires 29 February 2024 [Page 31] Internet-Draft NRPs YANG August 2023 [RFC7951] Lhotka, L., "JSON Encoding of Data Modeled with YANG", RFC 7951, DOI 10.17487/RFC7951, August 2016, . [RFC8040] Bierman, A., Bjorklund, M., and K. Watsen, "RESTCONF Protocol", RFC 8040, DOI 10.17487/RFC8040, January 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, . [RFC8340] Bjorklund, M. and L. Berger, Ed., "YANG Tree Diagrams", BCP 215, RFC 8340, DOI 10.17487/RFC8340, March 2018, . [RFC8341] Bierman, A. and M. Bjorklund, "Network Configuration Access Control Model", STD 91, RFC 8341, DOI 10.17487/RFC8341, March 2018, . [RFC8343] Bjorklund, M., "A YANG Data Model for Interface Management", RFC 8343, DOI 10.17487/RFC8343, 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, . [RFC8446] Rescorla, E., "The Transport Layer Security (TLS) Protocol Version 1.3", RFC 8446, DOI 10.17487/RFC8446, August 2018, . [RFC8519] Jethanandani, M., Agarwal, S., Huang, L., and D. Blair, "YANG Data Model for Network Access Control Lists (ACLs)", RFC 8519, DOI 10.17487/RFC8519, March 2019, . [RFC8776] Saad, T., Gandhi, R., Liu, X., Beeram, V., and I. Bryskin, "Common YANG Data Types for Traffic Engineering", RFC 8776, DOI 10.17487/RFC8776, June 2020, . 10.2. Informative References Wu, et al. Expires 29 February 2024 [Page 32] Internet-Draft NRPs YANG August 2023 [I-D.bestbar-teas-yang-nrp-policy] Beeram, V. P., Saad, T., Wen, B., Ceccarelli, D., Peng, S., Chen, R., Contreras, L. M., and X. Liu, "YANG Data Model for Network Resource Partition Policy", Work in Progress, Internet-Draft, draft-bestbar-teas-yang-nrp- policy-03, 24 October 2022, . [I-D.ietf-lsr-isis-sr-vtn-mt] Xie, C., Ma, C., Dong, J., and Z. Li, "Using IS-IS Multi- Topology (MT) for Segment Routing based Virtual Transport Network", Work in Progress, Internet-Draft, draft-ietf- lsr-isis-sr-vtn-mt-05, 10 July 2023, . [I-D.ietf-spring-sr-for-enhanced-vpn] Dong, J., Bryant, S., Miyasaka, T., Zhu, Y., Qin, F., Li, Z., and F. Clad, "Segment Routing based Virtual Transport Network (VTN) for Enhanced VPN", Work in Progress, Internet-Draft, draft-ietf-spring-sr-for-enhanced-vpn-05, 31 May 2023, . [I-D.ietf-teas-ietf-network-slices] Farrel, A., Drake, J., Rokui, R., Homma, S., Makhijani, K., Contreras, L. M., and J. Tantsura, "A Framework for Network Slices in Networks Built from IETF Technologies", Work in Progress, Internet-Draft, draft-ietf-teas-ietf- network-slices-24, 25 August 2023, . [I-D.ietf-teas-nrp-scalability] Dong, J., Li, Z., Gong, L., Yang, G., Guichard, J., Mishra, G. S., Qin, F., Saad, T., and V. P. Beeram, "Scalability Considerations for Network Resource Partition", Work in Progress, Internet-Draft, draft-ietf- teas-nrp-scalability-02, 2 June 2023, . [I-D.ietf-teas-ns-ip-mpls] Saad, T., Beeram, V. P., Dong, J., Wen, B., Ceccarelli, D., Halpern, J. M., Peng, S., Chen, R., Liu, X., Contreras, L. M., Rokui, R., and L. Jalil, "Realizing Network Slices in IP/MPLS Networks", Work in Progress, Wu, et al. Expires 29 February 2024 [Page 33] Internet-Draft NRPs YANG August 2023 Internet-Draft, draft-ietf-teas-ns-ip-mpls-02, 13 March 2023, . [I-D.wd-teas-nrp-yang] Wu, B., Dhody, D., Boucadair, M., Cheng, Y., and L. Gong, "A YANG Data Model for Network Resource Partitions (NRPs)", Work in Progress, Internet-Draft, draft-wd-teas- nrp-yang-02, 25 September 2022, . [RFC8309] Wu, Q., Liu, W., and A. Farrel, "Service Models Explained", RFC 8309, DOI 10.17487/RFC8309, January 2018, . [RFC9350] Psenak, P., Ed., Hegde, S., Filsfils, C., Talaulikar, K., and A. Gulko, "IGP Flexible Algorithm", RFC 9350, DOI 10.17487/RFC9350, February 2023, . Appendix A. An Example This section contains an example of an instance data tree in JSON encoding [RFC7951]. The example below instantiates an NRP for the topology that is depicted in the following diagram. There are three nodes, D1, D2, and D3. D1 has three termination points, 1-0-1, 1-2-1, and 1-3-1. D2 has three termination points as well, 2-1-1, 2-0-1, and 2-3-1. D3 has two termination points, 3-1-1 and 3-2-1. In addition there are six links, two between each pair of nodes with one going in each direction. Wu, et al. Expires 29 February 2024 [Page 34] Internet-Draft NRPs YANG August 2023 +------------+ +------------+ | D1 | | D2 | /-\ /-\ /-\ /-\ | | 1-0-1 | |---------------->| | 2-1-1 | | | | 1-2-1 | |<----------------| | 2-0-1 | | \-/ 1-3-1 \-/ \-/ 2-3-1 \-/ | /----\ | | /----\ | +---| |---+ +---| |---+ \----/ \----/ | | | | | | | | | | | | | | +------------+ | | | | | D3 | | | | | /-\ /-\ | | | +----->| | 3-1-1 | |-------+ | +---------| | 3-2-1 | |<---------+ \-/ \-/ | | +------------+ Figure 10: An NRP Instance Example An corresponding IGP congruent NRP instance data tree is depicted below: { "ietf-network:networks": { "nrp-policies": { "nrp-policy": [ { "name": "NRP1", "nrp-id": "foo:nrp-example1", "mode": "nrp-hybrid-plane-partition", "resource-reservation": { "bw-value": "10000" }, "selector": { "ipv6": { " ipv6-hbh-eh:": "100" } }, "topology": { "igp-congruent": { "multi-topology-id": "2" }, "select": { "topology-group": [ Wu, et al. Expires 29 February 2024 [Page 35] Internet-Draft NRPs YANG August 2023 { "group-id": "access-group", "base-topology-ref": { "network-ref": "native-topology" }, "link": [ { "link-ref": "D1,1-2-1,D2,2-1-1" }, { "link-ref": "D2,2-1-1,D1,1-2-1" }, { "link-ref": "D1,1-3-1,D3,3-1-1" }, { "link-ref": "D3,3-1-1,D1,1-3-1" }, { "link-ref": "D2,2-3-1,D3,3-2-1" }, { "link-ref": "D3,3-2-1,D2,2-3-1" } ], "link-partition-type": "virtual-sub-interface-partition" } ] } } } ] } } } Figure 11: Instance data tree In addition, an exampe of an NRP that supports the control plane partition mode is shown in the following figure. Wu, et al. Expires 29 February 2024 [Page 36] Internet-Draft NRPs YANG August 2023 { "ietf-network:networks": { "nrp-policies": { "nrp-policy": [ { "name": "NRP2", "nrp-id": "foo:nrp-example2", "mode": "nrp-control-plane-partition", "resource-reservation": { "bw-value": "10000" }, "topology": { "filters": { "filter": [ { "filter-ref": "te-topology-filter1" } ] } } } ] } } } Appendix B. NRPs YANG Module Tree Figure 12 shows the full tree diagram of the NRPs YANG model defined in module 'ietf-nrp.yang'. module: ietf-nrp augment /nw:networks: +--rw nrp-policies +--rw nrp-policy* [name] +--rw name string +--rw nrp-id? uint32 +--rw mode? identityref +--rw resource-reservation | +--rw (max-bw-type)? | +--:(bw-value) | | +--rw maximum-bandwidth? uint64 | +--:(bw-percentage) | +--rw maximum-bandwidth-percent? | rt-types:percentage +--rw selector | +--rw ipv4 | | +--rw destination-prefix* inet:ipv4-prefix Wu, et al. Expires 29 February 2024 [Page 37] Internet-Draft NRPs YANG August 2023 | +--rw ipv6 | | +--rw (selector-type)? | | +--:(dedicated) | | | +--rw ipv6-hbh-eh? uint32 | | +--:(srv6-sid-derived) | | | +--rw srv6-sid* | | | inet:ipv6-prefix | | +--:(ipv6-destination-derived) | | +--rw destination-prefix* | | inet:ipv6-prefix | +--rw mpls | +--rw acl-ref* nrp-acl-ref +--rw phb-profile? string +--rw topology +--rw igp-congruent! | +--rw multi-topology-id? uint32 | +--rw algo-id? uint32 | +--rw sharing? boolean +--rw (topology-type)? +--:(selection) | +--rw select | +--rw topology-group* [group-id] | +--rw group-id string | +--rw base-topology-ref | | +--rw network-ref? leafref | +--rw links* [link-ref] | | +--rw link-ref leafref | +--rw resource-reservation | | +--rw (max-bw-type)? | | +--:(bw-value) | | | +--rw maximum-bandwidth? | | | uint64 | | +--:(bw-percentage) | | +--rw maximum-bandwidth-percent? | | rt-types:percentage | +--rw link-partition-type? | | identityref | +--rw phb-profile? string +--:(filter) +--rw filters +--rw filter* [filter-ref] +--rw filter-ref | nrp-topo-filter-ref +--rw resource-reservation | +--rw (max-bw-type)? | +--:(bw-value) | | +--rw maximum-bandwidth? | | uint64 Wu, et al. Expires 29 February 2024 [Page 38] Internet-Draft NRPs YANG August 2023 | +--:(bw-percentage) | +--rw maximum-bandwidth-percent? | rt-types:percentage +--rw selector | +--rw ipv4 | | +--rw destination-prefix* | | inet:ipv4-prefix | +--rw ipv6 | | +--rw (selector-type)? | | +--:(dedicated) | | | +--rw ipv6-hbh-eh? | | | uint32 | | +--:(srv6-sid-derived) | | | +--rw srv6-sid* | | | inet:ipv6-prefix | | +--:(ipv6-destination-derived) | | +--rw destination-prefix* | | inet:ipv6-prefix | +--rw mpls | +--rw acl-ref* nrp-acl-ref +--rw phb-profile? string augment /nw:networks/nw:network/nw:network-types: +--rw nrp! augment /nw:networks/nw:network/nw:node: +--ro nrp +--ro selector +--ro srv6? srv6-types:srv6-sid augment /nw:networks/nw:network/nt:link: +--ro nrp +--ro link-partition-type? identityref +--ro bandwidth-value? uint64 +--ro selector | +--ro srv6? srv6-types:srv6-sid +--ro statistics +--ro admin-status? | te-types:te-admin-status +--ro oper-status? | te-types:te-oper-status +--ro one-way-available-bandwidth? uint64 +--ro one-way-utilized-bandwidth? uint64 +--ro one-way-min-delay? uint32 +--ro one-way-max-delay? uint32 +--ro one-way-delay-variation? uint32 +--ro one-way-packet-loss? decimal64 augment /nw:networks/nw:network/nw:node: +--ro nrps* [nrp-id] +--ro nrp-id uint32 +--ro nrp Wu, et al. Expires 29 February 2024 [Page 39] Internet-Draft NRPs YANG August 2023 +--ro selector +--ro srv6? srv6-types:srv6-sid augment /nw:networks/nw:network/nt:link: +--ro nrps* [nrp-id] +--ro nrp-id uint32 +--ro link-partition-type? identityref +--ro bandwidth-value? uint64 +--ro selector +--ro srv6? srv6-types:srv6-sid Figure 12 Appendix C. NRPs Device YANG Module Tree Figure 13 shows the full tree diagram of the NRPs device YANG model defined in module 'ietf-nrp-device.yang'. module: ietf-nrp-device augment /nw:networks/nrp:nrp-policies/nrp:nrp-policy: +--rw interfaces +--rw interface* [interface] +--rw interface if:interface-ref +--rw resource-reservation | +--rw (max-bw-type)? | +--:(bw-value) | | +--rw maximum-bandwidth? uint64 | +--:(bw-percentage) | +--rw maximum-bandwidth-percent? | rt-types:percentage +--rw selector | +--rw ipv4 | | +--rw destination-prefix* inet:ipv4-prefix | +--rw ipv6 | | +--rw (selector-type)? | | +--:(dedicated) | | | +--rw ipv6-hbh-eh? uint32 | | +--:(srv6-sid-derived) | | | +--rw srv6-sid* | | | srv6-types:srv6-sid | | +--:(ipv6-destination-derived) | | +--rw destination-prefix* | | inet:ipv6-prefix | +--rw mpls | +--rw acl-ref* nrp-acl-ref +--rw phb-profile? string Figure 13 Wu, et al. Expires 29 February 2024 [Page 40] Internet-Draft NRPs YANG August 2023 Authors' Addresses Bo Wu Huawei Technologies 101 Software Avenue, Yuhua District Nanjing Jiangsu, 210012 China Email: lana.wubo@huawei.com Dhruv Dhody Huawei Technologies Divyashree Techno Park Bangalore 560066 Karnataka India Email: dhruv.ietf@gmail.com Vishnu Pavan Beeram Juniper Networks Email: vbeeram@juniper.net Tarek Saad Cisco Systems Email: tsaad.net@gmail.com Shaofu Peng ZTE Corporation Email: peng.shaofu@zte.com.cn Wu, et al. Expires 29 February 2024 [Page 41]