| Internet-Draft | Network Inventory Location | October 2024 |
| Wu, et al. | Expires 12 April 2025 | [Page] |
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.¶
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 12 April 2025.¶
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.¶
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.¶
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].¶
The following terms are defined in [RFC7950] and are not redefined here:¶
The following terms are defined in [RFC6241] and are not redefined here:¶
The tree diagram used in this document follows the notation defined in [RFC8340].¶
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 "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
| ...
"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.¶
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____|
| |
The rack attributes include:¶
+--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]
...
Max-voltage: the maximum voltage supported by the rack.¶
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)?
| | +--:(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
The "ietf-ni-location" module uses types defined in [RFC9179], [I-D.ietf-ivy-network-inventory-yang].¶
<CODE BEGINS> file="[email protected]" 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: <https://datatracker.ietf.org/wg/ivy> WG List: <mailto:[email protected]> Editor: Bo Wu <[email protected]> Editor: Sergio Belotti <[email protected]> Editor: Jean-Francois Bouquier <[email protected]> Editor: Fabio Peruzzini <[email protected]> Editor: Phil Bedard <[email protected]>"; 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). 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."; } /* 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."; 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 "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"; 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 { 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; } } <CODE ENDS>¶
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.¶
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:¶
<<<to be completed>>>¶
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
¶
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.¶
The following authors contributed significantly to this document:¶
Italo Busi Huawei Technologies Email: [email protected] Chaode Yu Huawei Technologies Email: [email protected]¶