IVY B. Wu Internet-Draft Huawei Intended status: Standards Track S. Belotti Expires: 20 February 2025 Nokia J.-F. Bouquier Vodafone F. Peruzzini TIM P. Bedard Cisco 19 August 2024 A YANG Data Model for Network Inventory Location draft-wbbpb-ivy-network-inventory-location-02 Abstract This document defines a YANG data model for Network Inventory location (e.g., site, room, rack, geo-location data), which provides location information with different granularity levels for inventoried network elements. Accurate location information is useful for network planning, deployment, and maintenance. However, such information cannot be obtained or verified from the Network Elements themselves. This document defines a location model for network inventory that extends the base inventory with comprehensive location data. 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 20 February 2025. Wu, et al. Expires 20 February 2025 [Page 1] Internet-Draft Network Inventory Location August 2024 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 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 1.1. Terminology and Notations . . . . . . . . . . . . . . . . 3 1.2. Requirements Language . . . . . . . . . . . . . . . . . . 3 2. Hierarchical Locations of Network Inventory . . . . . . . . . 4 3. Rack . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 4. Network Inventory Location Tree . . . . . . . . . . . . . . . 6 5. YANG Data model for Network Inventory Location . . . . . . . 7 6. Security Considerations . . . . . . . . . . . . . . . . . . . 14 7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 15 8. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 15 9. Contributors . . . . . . . . . . . . . . . . . . . . . . . . 16 10. References . . . . . . . . . . . . . . . . . . . . . . . . . 16 10.1. Normative References . . . . . . . . . . . . . . . . . . 16 10.2. Informative References . . . . . . . . . . . . . . . . . 17 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 17 1. Introduction NEs can be grouped by location to provide more information for network planning, deployment, and maintenance (e.g., easily locate problematic NEs, optimize network resources, or help planning forecasts). The location can reflect outdoor or indoor information. An indoor location may be represented as a building, room, or other similar organizational structures. Outdoor locations can be walls, poles, or other mount places. The information about sites, equipment rooms, and other more precise locations is critical, but it cannot be automatically populated and retrieved from network elements (NEs). Instead, it is usually configured manually. Wu, et al. Expires 20 February 2025 [Page 2] Internet-Draft Network Inventory Location August 2024 The Network Inventory location model is to record physical locations, such as sites, building, equipment rooms, racks, and so on. Additionally, it includes provisions for physical addresses or geo- location data (geographic coordinates). The location model can extend the base network inventory [I-D.ietf-ivy-network-inventory-yang] to enrich NEs with location information. The Network Inventory location model is classified as a network configuration model (Section 4 of [RFC8309]). The Network Inventory location YANG model conforms to the Network Management Datastore Architecture (NMDA) [RFC8342]. 1.1. Terminology and Notations The following terms are defined in [RFC7950] and are not redefined here: * client * server * augment * data model * data node The following terms are defined in [RFC6241] and are not redefined here: * configuration data * state data The tree diagram used in this document follows the notation defined in [RFC8340]. 1.2. Requirements Language 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. Wu, et al. Expires 20 February 2025 [Page 3] Internet-Draft Network Inventory Location August 2024 2. Hierarchical Locations of Network Inventory The "location" list is generalized to support a variety of geographic location, such as sites, rooms, buildings. A site represents a general geographic location to group a set of NEs and corresponding inventory components. NEs, racks, equipment rooms, and buildings can be grouped within a site. A room is a facility, a space for network elements and other equipment (such as servers, storage) with power supply systems, air conditioning system, etc. Locations can be nested to form a hierarchy. For example, buildings may be within a site, and a room may be within a building. The "location-type" is defined as a YANG identity to identify the type of an inventory location, which may be site, equipment room, building, etc. +--rw locations +--rw location* [id] | +--rw id string | +--ro uuid? yang:uuid | +--rw name? string | +--rw description? string | +--rw alias? string | +--rw type? identityref | +--rw parent? -> ../../location/id | +--rw child* -> ../../location/id | +--rw physical-address | | ... | +--rw geo-location | ... Figure 1: YANG Subtree of Location 3. Rack "racks" represent physical equipment racks in which NEs can be installed, which facilitate device maintenance. Through "rack- location", each rack can be assigned to a site or a specific location within a site, such as an equipment room. Wu, et al. Expires 20 February 2025 [Page 4] Internet-Draft Network Inventory Location August 2024 Each rack is assigned a unique ID and a name in the context of a facility, e.g. a site. A rack may have some specific attributes, such as appearance-related attributes and electricity-related attributes. The height, depth and width are described by Figure 2 (please consider that the door of the rack is facing the user). Note: Further discussion is needed to decide whether to separate "racks" from the list of "location". ---------------- --- /| /| | / | / | | / | / | | ----|-----------| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | height | | | | | | | | | | | | | | | | | Door Q | | | | | Q | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | /-----------|---- --- | / | / / | / | / depth |/ | / / ----------------- --- |______width____| | | Figure 2: Height, Width and Depth of Rack The rack attributes include: Wu, et al. Expires 20 February 2025 [Page 5] Internet-Draft Network Inventory Location August 2024 +--rw racks +--rw rack* [id] +--rw id string | ... +--rw height? uint16 +--rw width? uint16 +--rw depth? uint16 +--rw max-voltage? uint16 +--rw max-allocated-power? uint16 +--rw contained-chassis* [relative-position] ... Figure 3: YANG Subtree of Rack Max-voltage: the maximum voltage supported by the rack. 4. Network Inventory Location Tree Figure 4 provides an overview of the data model for "ietf-ni- location" module. module: ietf-ni-location +--rw locations +--rw location* [id] | +--rw id string | +--ro uuid? yang:uuid | +--rw name? string | +--rw description? string | +--rw alias? string | +--rw type? identityref | +--rw parent? -> ../../location/id | +--rw child* -> ../../location/id | +--rw physical-address | | +--rw address? string | | +--rw postal-code? string | | +--rw state? string | | +--rw city? string | | +--rw country-code? string | +--rw geo-location | +--rw reference-frame | | +--rw alternate-system? string | | | {alternate-systems}? | | +--rw astronomical-body? string | | +--rw geodetic-system | | +--rw geodetic-datum? string | | +--rw coord-accuracy? decimal64 | | +--rw height-accuracy? decimal64 | +--rw (location)? Wu, et al. Expires 20 February 2025 [Page 6] Internet-Draft Network Inventory Location August 2024 | | +--:(ellipsoid) | | | +--rw latitude? decimal64 | | | +--rw longitude? decimal64 | | | +--rw height? decimal64 | | +--:(cartesian) | | +--rw x? decimal64 | | +--rw y? decimal64 | | +--rw z? decimal64 | +--rw velocity | | +--rw v-north? decimal64 | | +--rw v-east? decimal64 | | +--rw v-up? decimal64 | +--rw timestamp? yang:date-and-time | +--rw valid-until? yang:date-and-time +--rw racks +--rw rack* [id] +--rw id string +--ro uuid? yang:uuid +--rw name? string +--rw description? string +--rw alias? string +--rw rack-location | +--rw location-ref? ni-location-ref | +--rw row-number? uint32 | +--rw column-number? uint32 +--rw height? uint16 +--rw width? uint16 +--rw depth? uint16 +--rw max-voltage? uint16 +--rw max-allocated-power? uint16 +--rw contained-chassis* [relative-position] +--rw relative-position uint8 +--rw ne-ref? leafref +--rw component-ref? leafref augment /nwi:network-inventory/nwi:network-elements /nwi:network-element: +--rw locations +--rw location* ni-location-ref +--rw rack? -> /locations/racks/rack/id Figure 4: Network Inventory Location Tree Structure 5. YANG Data model for Network Inventory Location The "ietf-ni-location" module uses types defined in [RFC9179], [I-D.ietf-ivy-network-inventory-yang]. Wu, et al. Expires 20 February 2025 [Page 7] Internet-Draft Network Inventory Location August 2024 file="ietf-ni-location@2024-08-19.yang" module ietf-ni-location { yang-version 1.1; namespace "urn:ietf:params:xml:ns:yang:ietf-ni-location"; prefix nil; import ietf-network-inventory { prefix nwi; reference "RFCAAAA: A YANG Data Model for Network Inventory"; } import ietf-geo-location { prefix geo; reference "RFC 9179: A YANG Grouping for Geographic Locations"; } organization "IETF Network Inventory YANG (ivy) Working Group"; contact "WG Web: WG List: Editor: Bo Wu Editor: Sergio Belotti Editor: Jean-Francois Bouquier Editor: Fabio Peruzzini Editor: Phil Bedard "; description "This YANG module defines a model for Network Inventory location. 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). Wu, et al. Expires 20 February 2025 [Page 8] Internet-Draft Network Inventory Location August 2024 This version of this YANG module is part of RFC XXXX; see the RFC itself for full legal notices."; revision 2024-08-19 { description "Initial version"; reference "RFC XXXX: A YANG Data Model for Network Inventory location."; //RFC Editor: Please replace XXXX with actual RFC number, //update date information and remove this note } /* Identities */ identity inventory-location-type { description "Base identity for network inventory location types, e.g. site, room, building, and floor."; } identity site { base inventory-location-type; description "Indicates site as location type."; } identity room { base inventory-location-type; description "Indicates equipment room as location type."; } identity building { base inventory-location-type; description "Indicates building as location type."; } /* Typedef */ typedef ni-location-ref { type leafref { path "/nil:locations/nil:location/nil:id"; } description "This type is used by data models that need to reference network inventory location."; } Wu, et al. Expires 20 February 2025 [Page 9] Internet-Draft Network Inventory Location August 2024 /* Grouping */ grouping physical-address-grouping { description "The grouping of the physical address."; container physical-address { description "Top level container for the physical address."; leaf address { type string; description "Specifies an address (number and street)."; } leaf postal-code { type string; description "Specifies a postal code."; } leaf state { type string; description "Specifies a state. This leaf can also be used to describe a region for a country that does not have states."; } leaf city { type string; description "Specifies a city."; } leaf country-code { type string { pattern '[A-Z]{2}'; } description "Specifies a country. Expressed as ISO ALPHA-2 code."; } } } grouping locations-grouping { description "The grouping of the locations."; list location { key "id"; description "The list of locations within the network."; Wu, et al. Expires 20 February 2025 [Page 10] Internet-Draft Network Inventory Location August 2024 leaf id { type string; description "An identifier of the location."; } uses nwi:common-entity-attributes; leaf type { type identityref { base inventory-location-type; } description "The type of network inventory location, e.g. equipment room, building, or site."; } leaf parent { type leafref { path "../../location/id"; } description "The name of the location that physically contains this location."; } leaf-list child { type leafref { path "../../location/id"; } description "The name of the contained child locations."; } uses physical-address-grouping; uses geo:geo-location; } } grouping rack-grouping { description "The attributes of the rack."; container racks { description "Top level container for the list of racks."; list rack { key "id"; description "The list of racks within a location, e.g. equipment room."; leaf id { type string; description Wu, et al. Expires 20 February 2025 [Page 11] Internet-Draft Network Inventory Location August 2024 "An identifier that uniquely identifies the rack within a location, e.g. equipment room."; } uses nwi:common-entity-attributes; container rack-location { description "The location information of the rack, which comprises the name of the location, row number, and column number."; leaf location-ref { type ni-location-ref; description "Name of location where this rack is located."; } leaf row-number { type uint32; description "Identifies the row within the equipment room where the rack is located."; } leaf column-number { type uint32; description "Identifies the physical location of the rack within the column."; } } leaf height { type uint16; units "millimeter"; description "Rack height."; } leaf width { type uint16; units "millimeter"; description "Rack width."; } leaf depth { type uint16; units "millimeter"; description "Rack depth."; } leaf max-voltage { type uint16; units "volt"; Wu, et al. Expires 20 February 2025 [Page 12] Internet-Draft Network Inventory Location August 2024 description "The maximum voltage could be supported by the rack."; } leaf max-allocated-power { type uint16; units "watts"; description "The maximum allocated power to the rack."; } list contained-chassis { key "relative-position"; description "The list of chassis within a rack."; leaf relative-position { type uint8; description "A relative position of chassis within the rack"; } leaf ne-ref { type leafref { path "/nwi:network-inventory/nwi:network-elements" + "/nwi:network-element/nwi:ne-id"; } description "The reference to the network element containing the chassis component."; } leaf component-ref { type leafref { path "/nwi:network-inventory/nwi:network-elements" + "/nwi:network-element[nwi:ne-id=current()/.." + "/ne-ref]/nwi:components/nwi:component" + "/nwi:component-id"; } description "The reference to the chassis component within the network element and contained by the rack."; } } } } } grouping locations-ref-grouping { description "The attributes of the locations."; container locations { Wu, et al. Expires 20 February 2025 [Page 13] Internet-Draft Network Inventory Location August 2024 description "The container for the location."; leaf-list location { type ni-location-ref; description "The reference of the location."; } leaf rack { type leafref { path "/nil:locations/nil:racks" + "/nil:rack/nil:id"; } description "The reference to the rack."; } } } container locations { description "The top-level container for the NE location information."; uses locations-grouping; uses rack-grouping; } augment "/nwi:network-inventory/nwi:network-elements/nwi:network-element" { description "Provides location information for network inventory."; uses locations-ref-grouping; } } 6. Security Considerations The YANG module specified in this document defines a data schema designed to be accessed through network management protocols such as NETCONF [RFC6241]or RESTCONF [RFC8040]. The lowest NETCONF layer is the secure transport layer, and the required secure transport is Secure Shell (SSH) [RFC6242]. The lowest RESTCONF layer is HTTPS, and the required secure transport is TLS [RFC8446]. The Network Configuration Access Control Model (NACM) [RFC8341] provides a means of restricting access to specific NETCONF or RESTCONF users to a preconfigured subset of all available NETCONF or RESTCONF protocol operations and contents. Thus, NACM SHOULD be used to restrict the NSF registration from unauthorized users. Wu, et al. Expires 20 February 2025 [Page 14] Internet-Draft Network Inventory Location August 2024 There are a number of data nodes defined in this YANG module that are writable, creatable, and deletable (i.e., config true, which is the default). These data nodes may be considered sensitive or vulnerable in some network environments. Write operations to these data nodes could have a negative effect on network and security operations. 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: <<>> 7. IANA Considerations This document registers a URI in the "IETF XML Registry" [RFC3688]. Following the format in [RFC3688], the following registration has been made. URI: urn:ietf:params:xml:ns:yang:ietf-ni-location Registrant Contact: The IESG. XML: N/A, the requested URI is an XML namespace. This document registers a YANG module in the "YANG Module Names" registry[RFC7950] . name: ietf-ni-location namespace: urn:ietf:params:xml:ns:yang:ietf-ni-location prefix: nil maintained by IANA: N reference: RFC xxxx 8. Acknowledgements The authors would like to thank the authors and contributors of [I-D.ietf-ccamp-network-inventory-yang] to trigger this work. During the discussion of base Network Inventory (NI) model, it is agreed that the definition of the equipment room and rack can be a separate location model and support manual configuration, while the NI model aggregates the inventory data of the Network Elements (NEs) on the network. Usually the information about sites or equipment rooms is not detectable by network controller and configured manually. The authors wish to thank Mohamed Boucadair and many others for their helpful comments and suggestions. Wu, et al. Expires 20 February 2025 [Page 15] Internet-Draft Network Inventory Location August 2024 9. Contributors The following authors contributed significantly to this document: Italo Busi Huawei Technologies Email: italo.busi@huawei.com Chaode Yu Huawei Technologies Email: yuchaode@huawei.com 10. References 10.1. Normative References [I-D.ietf-ivy-network-inventory-yang] Yu, C., Belotti, S., Bouquier, J., Peruzzini, F., and P. Bedard, "A YANG Data Model for Network Inventory", Work in Progress, Internet-Draft, draft-ietf-ivy-network- inventory-yang-03, 7 July 2024, . [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, DOI 10.17487/RFC2119, March 1997, . [RFC3688] Mealling, M., "The IETF XML Registry", BCP 81, RFC 3688, DOI 10.17487/RFC3688, January 2004, . [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, . [RFC7950] Bjorklund, M., Ed., "The YANG 1.1 Data Modeling Language", RFC 7950, DOI 10.17487/RFC7950, August 2016, . Wu, et al. Expires 20 February 2025 [Page 16] Internet-Draft Network Inventory Location August 2024 [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, . [RFC8341] Bierman, A. and M. Bjorklund, "Network Configuration Access Control Model", STD 91, RFC 8341, DOI 10.17487/RFC8341, March 2018, . [RFC8446] Rescorla, E., "The Transport Layer Security (TLS) Protocol Version 1.3", RFC 8446, DOI 10.17487/RFC8446, August 2018, . [RFC9179] Hopps, C., "A YANG Grouping for Geographic Locations", RFC 9179, DOI 10.17487/RFC9179, February 2022, . 10.2. Informative References [I-D.ietf-ccamp-network-inventory-yang] Yu, C., Belotti, S., Bouquier, J., Peruzzini, F., and P. Bedard, "A YANG Data Model for Network Hardware Inventory", Work in Progress, Internet-Draft, draft-ietf- ccamp-network-inventory-yang-02, 9 July 2023, . [RFC8309] Wu, Q., Liu, W., and A. Farrel, "Service Models Explained", RFC 8309, DOI 10.17487/RFC8309, January 2018, . [RFC8340] Bjorklund, M. and L. Berger, Ed., "YANG Tree Diagrams", BCP 215, RFC 8340, DOI 10.17487/RFC8340, 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, . Authors' Addresses Wu, et al. Expires 20 February 2025 [Page 17] Internet-Draft Network Inventory Location August 2024 Bo Wu Huawei 101 Software Avenue, Yuhua District Nanjing Jiangsu, 210012 China Email: lana.wubo@huawei.com Sergio Belotti Nokia Email: sergio.belotti@nokia.com Jean-Francois Bouquier Vodafone Email: jeff.bouquier@vodafone.com Fabio Peruzzini TIM Email: fabio.peruzzini@telecomitalia.it Phil Bedard Cisco Email: phbedard@cisco.com Wu, et al. Expires 20 February 2025 [Page 18]