Getting Ready for Energy-Efficient Networking G. Chen
Internet-Draft Q. Wu
Intended status: Standards Track Huawei
Expires: 3 September 2025 E. Stephan
Orange
O. G. D. Dios
Telefonica I+D
C. Pignataro
North Carolina State University
S. Han
China Unicom
2 March 2025
A Network Inventory Data Model for Energy Efficiency Management
draft-cwbgp-green-inventory-energy-management-00
Abstract
As a complement to the YANG Network Topology Data Model for Energy
Efficiency Management, which is used for monitoring the dynamic
energy consumption of network devices, this document defines YANG
Network Inventory Data Model for Energy Efficiency Management that
can be used for maintaining capability related energy efficiency
attributes. The model provides both network view and device view of
energy efficiency related inventory information.
Discussion Venues
This note is to be removed before publishing as an RFC.
Discussion of this document takes place on the Network Inventory YANG
Working Group mailing list (inventory-yang@ietf.org), which is
archived at https://mailarchive.ietf.org/arch/browse/inventory-yang/.
Source for this draft and an issue tracker can be found at
https://github.com/boucadair/draft-cwbgp-energy-saving-management.
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 3 September 2025.
Copyright Notice
Copyright (c) 2025 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
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provided without warranty as described in the Revised BSD License.
Table of Contents
1. Introduction
1.1. Notes to the RFC Editor
2. Conventions and Definitions
3. YANG Prefixes
4. Energy Saving Management Data Model Overview
4.1. Overview
4.2. ESM Inventory Model
5. Network Inventory Energy Saving YANG Module
6. Security Considerations
7. IANA Considerations
7.1. The "IETF XML" Registry
7.2. The "YANG Module Names" Registry
8. References
8.1. Normative References
8.2. Informative References
Acknowledgments
Authors' Addresses
1. Introduction
With the growth of networks and the increase of awareness about the
environmental impact, it is important to ensure energy efficiency in
the operation of network infrastructures. Operators are thus seeking
for more information to reflect the power consumption of a network
and the contribution of involved nodes.
However, there are no standard mechanisms to report either capability
related energy efficiency attributes or dynamic power consumption of
different networking equipment under different network configuration
and conditions. [I-D.cwbgp-green-energy-saving-management] defines
YANG module which is used for monitoring the dynamic energy
consumption of network devices at both network and device levels
(Section 3.5.1 of [I-D.ietf-netmod-rfc8407bis]).
As a complement to the YANG Network Topology Data Model for Energy
Efficiency Management [I-D.cwbgp-green-energy-saving-management],
this document defines YANG Network Inventory Data Model for Energy
Efficiency Management that can be used for maintaining capability
related energy efficiency attributes. The model provides both
network view and device view of energy efficiency related inventory
information.
The inventory model augments the "ietf-network-inventory" module
[I-D.ietf-ivy-network-inventory-yang] with the following rationale:
* Parameters that reflect the saving modes and methods are
considered as capabilities, and are thus maintained in the
inventory.
The document leverages types defined in [RFC3418] and [RFC6933].
1.1. Notes to the RFC Editor
Note to the RFC Editor: This section is to be removed prior to
publication.
This document contains placeholder values that need to be replaced
with finalized values at the time of publication. This note
summarizes all the substitutions that are needed.
Please apply the following replacements:
* XXXX --> the RFC number assigned to this I-D
* 2024-01-23 --> the actual date of the publication of this document
2. Conventions and Definitions
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 meanings of the symbols in the YANG tree diagrams are defined in
[RFC8340].
The document uses the terms defined in [I-D.bclp-green-terminology]
and [I-D.ietf-ivy-network-inventory-yang].
3. YANG Prefixes
Names of data nodes and other data model objects are prefixed using
the standard prefix associated with the corresponding YANG imported
modules, as shown in {{pref}}.
+======+======================+=====================================+
|Prefix|YANG Module |Reference |
+======+======================+=====================================+
|ianahw|iana-hardware |[IANA_YANG] |
+------+----------------------+-------------------------------------+
|ni |ietf-network-inventory|[I-D.ietf-ivy-network-inventory-yang]|
+------+----------------------+-------------------------------------+
|yang |ietf-yang-types |[RFC6991] |
+------+----------------------+-------------------------------------+
Table 1: Prefixes and Corresponding YANG modules
4. Energy Saving Management Data Model Overview
4.1. Overview
As described in [I-D.ietf-ivy-network-inventory-yang], the Network
Inventory YANG data model is used to maintain the base network
inventory information. This document defines the YANG module "ietf-
ni-energy-saving", which augments network element of the network
Inventory base model with energy saving modes, associated energy
saving methods and augments the component of the network inventory
base model with capability related power attributes.
The data model defines energy saving modes representing some energy
consumption levels, which are basic, standard, or deep. For each
consumption level, there is a combination of methods to reach the
energy saving target level.
At the component level, the data model includes a set of threshold
related power parameters such as rated power, expected volts.
4.2. ESM Inventory Model
The structure of the ESM Network Inventory Model is depicted in
Figure 1.
module: ietf-ni-energy-saving
grouping network-element-ref:
+-- ne-ref? leafref
grouping component-ref:
+-- node-ref? leafref
+-- ne-ref? leafref
augment /ni:network-inventory/ni:network-elements
/ni:network-element:
+--ro energy-management {esm-common:energy-saving}?
+--ro energy-monitoring-capability? boolean
+--ro energy-saving-modes
+--ro energy-saving-mode* [mode]
+--ro mode identityref
+--ro energy-saving-method* identityref
augment /ni:network-inventory/ni:network-elements
/ni:network-element/ni:components/ni:component:
+--ro power-parameters {esm-common:energy-saving}?
+--ro temperature-upper-bound? int32
+--ro temperature-middle-bound? int32
+--ro temperature-lower-bound? int32
+--ro rated-power? yang:gauge64
+--ro expected-volts? int32
+--ro low-volts-bound? int32
+--ro low-volts-fatal? int32
+--ro high-volts-bound? int32
+--ro high-volts-fatal? int32
Figure 1: ESM Inventory Model Tree Structure
5. Network Inventory Energy Saving YANG Module
The module imports "ietf-network-inventory"
[I-D.ietf-ivy-network-inventory-yang] and "ietf-energy-saving-
common".
<CODE BEGINS> file "ietf-ni-energy-saving@2024-01-23.yang"
module ietf-ni-energy-saving {
yang-version 1.1;
namespace "urn:ietf:params:xml:ns:yang:ietf-ni-energy-saving";
prefix esm-ni;
import ietf-energy-efficiency-common {
prefix esm-common;
reference
"RFC XXXX: YANG Data Models for Energy Saving Management";
}
import ietf-network-inventory {
prefix ni;
reference
"RFC IIII: A YANG Data Model for Network Inventory";
}
organization
"IETF xxx Working Group.";
contact
"WG Web: <https://datatracker.ietf.org/wg/xxx/>;
WG List: <mailto:xxxx@ietf.org>
Author: Gen Chen
<mailto:chengen@huawei.com>
Editor: Qin Wu
<mailto:bill.wu@huawei.com>
Editor: XXX XXXX
<mailto:xxx.xxx@orange.com>
Author: Carlos Pignataro
<mailto:cpignata@gmail.com>";
description
"This module contains a collection of YANG definitions for power
and energy management of devices. It also augments both the
network topology and inventory models.
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 2024-01-23 {
description
"Initial revision.";
reference
"RFC XXXX: YANG Data Models for Energy Saving Management";
}
grouping network-element-ref {
description
"Contains the information necessary to reference a network
element.";
leaf ne-ref {
type leafref {
path "/ni:network-inventory/ni:network-elements"
+ "/ni:network-element/ni:ne-id";
require-instance false;
}
description
"Used to reference a network element.";
}
}
grouping component-ref {
description
"Contains the information necessary to reference a component.";
leaf node-ref {
type leafref {
path "/ni:network-inventory/ni:network-elements"
+ "/ni:network-element[ni:ne-id="
+ "current()/../ne-ref]/ni:components/ni:component"
+ "/ni:component-id";
require-instance false;
}
description
"Used to reference a component.";
}
uses network-element-ref;
}
augment "/ni:network-inventory/ni:network-elements"
+ "/ni:network-element" {
if-feature "esm-common:energy-saving";
description
"Energy management static data for network element.";
container energy-management {
config false;
description
"Statistics of the energy management.";
leaf energy-monitoring-capability {
type boolean;
description
"Indicates whether monitoring can be performed.";
}
container energy-saving-modes {
description
"List of supported energy saving modes.";
uses esm-common:energy-saving-modes;
}
}
}
augment "/ni:network-inventory/ni:network-elements"
+ "/ni:network-element/ni:components/ni:component" {
if-feature "esm-common:energy-saving";
description
"Energy management static data for component.";
container power-parameters {
config false;
description
"Power parameter monitoring.";
uses esm-common:power-parameters;
}
}
}
<CODE ENDS>
6. Security Considerations
This section is modeled after the template described in Section 3.7
of [I-D.ietf-netmod-rfc8407bis].
The "ietf-ni-energy-saving" YANG module defines a data model that is
designed to be accessed via YANG-based management protocols, such as
NETCONF [RFC6241] and RESTCONF [RFC8040]. These protocols have to
use a secure transport layer (e.g., SSH [RFC4252], TLS [RFC8446], and
QUIC [RFC9000]) and have to use mutual authentication.
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.
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. Specifically, the following
subtrees and data nodes have particular sensitivities/
vulnerabilities:
'TBC': ....
7. IANA Considerations
7.1. The "IETF XML" Registry
This document requests IANA to register the following URIs in the
"ns" sub-registry within the "IETF XML Registry" [RFC3688]:
URI: urn:ietf:params:xml:ns:yang:ietf-ni-energy-saving
Registrant Contact: The IESG.
XML: N/A, the requested URIs are XML namespaces.
7.2. The "YANG Module Names" Registry
This document requests IANA to register the following YANG modules in
the "YANG Module Names" registry [RFC6020] within the "YANG
Parameters" registry group.
name: ietf-ni-energy-saving
prefix: esm-ni
namespace: urn:ietf:params:xml:ns:yang:ietf-ni-energy-saving
Maintained by IANA? N
Reference: RFC XXXX
8. References
8.1. Normative References
[I-D.bclp-green-terminology]
Liu, P. C., Boucadair, M., Wu, Q., Contreras, L. M., and
M. Palmero, "Terminology for Energy Efficiency Network
Management", Work in Progress, Internet-Draft, draft-bclp-
green-terminology-00, 10 October 2024,
<https://datatracker.ietf.org/doc/html/draft-bclp-green-
terminology-00>.
[I-D.ietf-ivy-network-inventory-yang]
Yu, C., Belotti, S., Bouquier, J., Peruzzini, F., and P.
Bedard, "A Base YANG Data Model for Network Inventory",
Work in Progress, Internet-Draft, draft-ietf-ivy-network-
inventory-yang-05, 28 February 2025,
<https://datatracker.ietf.org/doc/html/draft-ietf-ivy-
network-inventory-yang-05>.
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119,
DOI 10.17487/RFC2119, March 1997,
<https://www.rfc-editor.org/rfc/rfc2119>.
[RFC3418] Presuhn, R., Ed., "Management Information Base (MIB) for
the Simple Network Management Protocol (SNMP)", STD 62,
RFC 3418, DOI 10.17487/RFC3418, December 2002,
<https://www.rfc-editor.org/rfc/rfc3418>.
[RFC3688] Mealling, M., "The IETF XML Registry", BCP 81, RFC 3688,
DOI 10.17487/RFC3688, January 2004,
<https://www.rfc-editor.org/rfc/rfc3688>.
[RFC6020] Bjorklund, M., Ed., "YANG - A Data Modeling Language for
the Network Configuration Protocol (NETCONF)", RFC 6020,
DOI 10.17487/RFC6020, October 2010,
<https://www.rfc-editor.org/rfc/rfc6020>.
[RFC6933] Bierman, A., Romascanu, D., Quittek, J., and M.
Chandramouli, "Entity MIB (Version 4)", RFC 6933,
DOI 10.17487/RFC6933, May 2013,
<https://www.rfc-editor.org/rfc/rfc6933>.
[RFC6991] Schoenwaelder, J., Ed., "Common YANG Data Types",
RFC 6991, DOI 10.17487/RFC6991, July 2013,
<https://www.rfc-editor.org/rfc/rfc6991>.
[RFC8174] Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC
2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174,
May 2017, <https://www.rfc-editor.org/rfc/rfc8174>.
[RFC8341] Bierman, A. and M. Bjorklund, "Network Configuration
Access Control Model", STD 91, RFC 8341,
DOI 10.17487/RFC8341, March 2018,
<https://www.rfc-editor.org/rfc/rfc8341>.
8.2. Informative References
[I-D.cprjgf-bmwg-powerbench]
Pignataro, C., Jacob, R., Fioccola, G., and Q. Wu,
"Characterization and Benchmarking Methodology for Power
in Networking Devices", Work in Progress, Internet-Draft,
draft-cprjgf-bmwg-powerbench-04, 30 January 2025,
<https://datatracker.ietf.org/doc/html/draft-cprjgf-bmwg-
powerbench-04>.
[I-D.cwbgp-green-energy-saving-management]
Chen, G., Wu, Q., Boucadair, M., de Dios, O. G., and C.
Pignataro, "YANG Data Models for Energy Saving
Management", Work in Progress, Internet-Draft, draft-
cwbgp-green-energy-saving-management-01, 24 October 2024,
<https://datatracker.ietf.org/doc/html/draft-cwbgp-green-
energy-saving-management-01>.
[I-D.cx-opsawg-green-metrics]
Clemm, A., Dong, L., Mirsky, G., Ciavaglia, L., Tantsura,
J., Odini, M., Schooler, E., Rezaki, A., and C. Pignataro,
"Green Networking Metrics", Work in Progress, Internet-
Draft, draft-cx-opsawg-green-metrics-02, 4 March 2024,
<https://datatracker.ietf.org/doc/html/draft-cx-opsawg-
green-metrics-02>.
[I-D.ietf-netmod-rfc8407bis]
Bierman, A., Boucadair, M., and Q. Wu, "Guidelines for
Authors and Reviewers of Documents Containing YANG Data
Models", Work in Progress, Internet-Draft, draft-ietf-
netmod-rfc8407bis-22, 14 January 2025,
<https://datatracker.ietf.org/doc/html/draft-ietf-netmod-
rfc8407bis-22>.
[I-D.manral-bmwg-power-usage]
Manral, V., Sharma, P., Banerjee, S., and Y. Ping,
"Benchmarking Power usage of networking devices", Work in
Progress, Internet-Draft, draft-manral-bmwg-power-usage-
04, 12 March 2013, <https://datatracker.ietf.org/doc/html/
draft-manral-bmwg-power-usage-04>.
[RFC4252] Ylonen, T. and C. Lonvick, Ed., "The Secure Shell (SSH)
Authentication Protocol", RFC 4252, DOI 10.17487/RFC4252,
January 2006, <https://www.rfc-editor.org/rfc/rfc4252>.
[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,
<https://www.rfc-editor.org/rfc/rfc6241>.
[RFC8040] Bierman, A., Bjorklund, M., and K. Watsen, "RESTCONF
Protocol", RFC 8040, DOI 10.17487/RFC8040, January 2017,
<https://www.rfc-editor.org/rfc/rfc8040>.
[RFC8340] Bjorklund, M. and L. Berger, Ed., "YANG Tree Diagrams",
BCP 215, RFC 8340, DOI 10.17487/RFC8340, March 2018,
<https://www.rfc-editor.org/rfc/rfc8340>.
[RFC8446] Rescorla, E., "The Transport Layer Security (TLS) Protocol
Version 1.3", RFC 8446, DOI 10.17487/RFC8446, August 2018,
<https://www.rfc-editor.org/rfc/rfc8446>.
[RFC9000] Iyengar, J., Ed. and M. Thomson, Ed., "QUIC: A UDP-Based
Multiplexed and Secure Transport", RFC 9000,
DOI 10.17487/RFC9000, May 2021,
<https://www.rfc-editor.org/rfc/rfc9000>.
Acknowledgments
This work has benefited from the discussions that occurred during the
Sustainable Networking Side Meeting in IETF#117 and the "e-impact"
IAB workshop. In particular, [I-D.cx-opsawg-green-metrics] assess
several sustainability-related attributes such as power consumption,
energy efficiency, and carbon footprint associated with a network,
its equipment, and the services that are provided over it and suggest
a set of metrics that provide network observability and can be used
to optimize a network's "greenness". [I-D.manral-bmwg-power-usage]
and [I-D.cprjgf-bmwg-powerbench] provide suggestions for measuring
power usage of live networks under different traffic loads and
various switch router configuration settings.
Authors' Addresses
Gen Chen
Huawei
China
Email: chengen@huawei.com
Qin Wu (editor)
Huawei
China
Email: bill.wu@huawei.com
Emile Stephan (editor)
Orange
France
Email: emile.stephan@orange.com
Oscar Gonzales de Dios
Telefonica I+D
Spain
Email: oscar.gonzalezdedios@telefonica.com
Carlos Pignataro
North Carolina State University
United States of America
Email: cpignata@gmail.com
Sai Han
China Unicom
China
Email: hans29@chinaunicom.cn