Internet-Draft Energy Saving Management February 2024
Chen, et al. Expires 18 August 2024 [Page]
Workgroup:
Network Inventory YANG
Internet-Draft:
draft-cwbgp-ivy-energy-saving-management-00
Published:
Intended Status:
Standards Track
Expires:
Authors:
G. Chen
Huawei
Q. Wu
Huawei
M. Boucadair
Orange
O. G. D. Dios
Telefonica I+D
C. Pignataro
North Carolina State University

A YANG Data Model for Energy Saving Management

Abstract

This document defines a YANG module for power and energy management. The document covers both device and network levels.

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 18 August 2024.

▲

Table of Contents

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 and control power usage of different networking equipment under different network configuration and conditions. For example, in 'tidal network' in which traffic volume undergoes significant fluctuations at different times, various energy management methods might be envisaged to optimize the energy efficiency at the network scale, e.g., by selectively disabling ports or cards on specific network nodes based on (forecast) traffic patterns.

This document defines a YANG data model for use in energy management of network devices. Such model can be used for monitoring the energy consumption of network devices, such as (but are not limited to) routers, switches, security gateways, hosts, or servers. Where applicable, device monitoring extends to the individual components of the device.

The document augments both "ietf-network" [RFC8345] and "ietf-network-inventory" [I-D.ietf-ivy-network-inventory-yang] with the following rationale:

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 following terms are used in the document:

Network Inventory:

A collection of data for network devices and their components managed by a specific management system [I-D.ietf-ivy-network-inventory-yang].

Chassis:

A physical container that allows installation of power modules, fan modules, and various types of boards and cards [I-D.ietf-ivy-network-inventory-yang].

Network Element:

A manageable network entity that contains hardware and software units, e.g., a network device installed on one or several chassis [I-D.ietf-ivy-network-inventory-yang].

Board and Card:

A pluggable equipment can be inserted into one or several slots/ sub-slots and can afford a specific transmission function independently [I-D.ietf-ivy-network-inventory-yang]. The core modular units for processing data. Depending on functions, they can be classified into Main Processing Unit (MPU), Switch Fabric Unit (SFU), Line Processing Unit (LPU), and other types. MPU is responsible for system control, management, and monitoring. SFU is responsible for line-rate data switching on the data plane. LPU is responsible for data packet processing and traffic management.

Port and Interface:

A port is a physical entity that is used for connections. While an interface is a logical entity for connections.

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 Table 1.

Table 1: Prefixes and Corresponding YANG modules
Prefix YANG Module Reference
ianahw iana-hardware [IANA_YANG]
ni ietf-network-inventory RFC IIII

4. Energy Saving Management Data Model 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- energy-saving-management", which augments network element of the network Inventory base model with energy saving modes and augments the component of the network inventory base model with energy consumption and energy saving attributes.

At the network element level, the data model covers configuration of the energy saving mode and a set of related parameters to manage (e.g., retrieve, adjust) the status of power units, fans, boards, cards, ports, processors, and links. For example, the adjustment methods include frequency tuning, shutdown, or sleep mode. In addition, the methods also support the energy saving configuration for the 'tidal' traffic flow, where related components can be turned off, e.g., during "idle" hours to optimize the energy consumption and then woken up based on some triggered (e.g., busy hours or other scheduled events).

The data model defines energy saving modes representing some energy consumption levels, which are basic, standard, deep, optimal and custom. 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 monitoring statistics for energy consumption and energy saving operator state of each component within the network device.

4.1. Energy Saving Management Tree Diagram

Figure 1 shows the tree diagram of the YANG data model defined in Section 5.

module: ietf-energy-saving-mgt
  +--rw component-energy-monitoring
     +--rw energy-consumption
     |  +--rw average-power?     yang:gauge64
     |  +--rw saved-power?       yang:gauge64
     |  +--rw current-power?     yang:gauge64
     |  +--rw current-volts?     int32
     |  +--rw current-amperes?   int32
     |  +--rw temperature?       int32
     +--rw energy-saving
     |  +--rw enabled?      boolean
     |  +--rw oper-state?   identityref
     +--rw inventory-component-ref
        +--rw node-ref?   leafref
        +--rw ne-ref?
                -> /ni:network-elements/network-element/ne-id

  augment /nw:networks/nw:network/nw:node:
    +--ro energy-power-consumption {energy-saving}?
    |  +--ro total-energy-consumption?   yang:gauge64
    |  +--ro saved-energy?               yang:gauge64
    |  +--ro eer?                        decimal64
    +--rw energy-saving-modes {energy-saving}?
       +--rw energy-saving-mode*     identityref
       +--rw energy-saving-method*   identityref
  augment /ni:network-elements/ni:network-element:
    +--ro energy-management {energy-saving}?
       +--ro energy-monitoring-capability?   boolean
       +--ro energy-saving-modes
          +--ro energy-saving-mode*     identityref
          +--ro energy-saving-method*   identityref
  augment /ni:network-elements/ni:network-element/ni:components
            /ni:component:
    +--ro energy-parameters {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: Energy Saving Management Tree Structure

4.2. Network Element Specific Information

Network element specific attributes can be defined in the network element list node as shown inFigure 2.

4.3. Component Specific Information

Component-specific attributes can be defined under the component list node as shown in Figure 3.

5. Energy Saving YANG Module

The module imports XXX and uses types defined in XXX.

<CODE BEGINS> file "ietf-energy-saving-mgt@2024-01-23.yang"
module ietf-energy-saving-mgt {
  yang-version 1.1;
  namespace "urn:ietf:params:xml:ns:yang:ietf-energy-saving-mgt";
  prefix em;

  import ietf-network-inventory {
    prefix ni;
    reference
      "RFC IIII: A YANG Data Model for Network Inventory";
  }
  import ietf-yang-types {
    prefix yang;
    reference
      "RFC 6021: Common YANG Types";
  }
  import ietf-network {
    prefix nw;
    reference
      "RFC 8345: A YANG Data Model for Network Topologies";
  }

  organization
    "IETF IVY Working Group.";
  contact
    "WG Web:   <https://datatracker.ietf.org/wg/opsawg/>;
     WG List:  <mailto:opsawg@ietf.org>

     Author:   Gen Chen
               <mailto:chengen@huawei.com>
     Author:   Qin Wu
               <mailto:bill.wu@huawei.com>
     Author:   Mohamed Boucadair
               <mailto:mohamed.boucadair@orange.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: A YANG Data Model for Energy Saving Management";
  }

  feature energy-saving {
    description
      "Specifies support of energy saving management.";
  }

  identity energy-saving-mode {
    description
      "Base identity for energy saving mode.";
  }

  identity basic {
    base energy-saving-mode;
    description
      "Basic energy saving mode.

       In this mode, the system will shut down idle modules
       and put them in a sleep mode.";
  }

  identity standard {
    base energy-saving-mode;
    description
      "Standard energy saving mode.

       In this mode, the system extends basic energy saving
       mode with more advanced Lossless energy saving features,
       e.g., power module schedule.";
  }

  identity deep {
    base energy-saving-mode;
    description
      "Deep energy saving mode.

       In this mode, the system extends standard energy saving
       mode with more advanced system level energy saving features,
       e.g., board scheduling.";
  }

  identity energy-saving-method {
    description
      "Base identity for energy saving method.";
  }

  identity zone-based-fan-speed-adjustment {
    base energy-saving-method;
    description
      "The system collects information about the
       temperatures of the service boards in the chassis
       and the zones where the service boards reside.

       According to the current temperature and target
       temperature of each board, the system implements
       stepless speed adjustment in different zones.";
  }

  identity unused-high-speed-interface-shutdown {
    base energy-saving-method;
    description
      "When detecting an unused high-speed interface, the
       system shuts down the interface to reduce power consumption
       of the interface circuits.

       When the interface needs to run service, the
       system will automatically wake up the interface and
       restore the interface to the normal working state.";
  }

  identity unused-port-shutdown {
    base energy-saving-method;
    description
      "When detecting an unused user port, the system automatically
       or manually shuts down the interface circuits and optical
       module of the port to reduce port power consumption. When
       detecting that the port needs to run service, the system
       automatically enables the port and restores the port to the
       normal running state, without affecting application of the
       board.";
  }

  identity unused-board-shutdown {
    base energy-saving-method;
    description
      "When detecting an unused board, the system automatically
       shuts down the power supply of the board, ensuring zero
       power consumption of an unused board.

       When detecting that the board needs to run service, the system
       automatically powers on the board and restores the board
       to the normalrunning state, without affecting application of
       the whole device.";
  }

  identity dynamic-frequency-adjustment {
    base energy-saving-method;
    description
      "When detecting that a service board is carrying a small
       service load, the system automatically reduces the working
       frequency of the service processing module of the board
       while maintaining the service quality. In doing so, power
       consumption of the service processing module is reduced.
       When the service load of the board increases, the system
       automatically increases the working frequency of the service
       processing module to meet service needs.";
  }

  identity unused-channel-shutdown {
    base energy-saving-method;
    description
      "When an unused channel is detected, the unused channel is
       closed. Dynamically open the channel when detecting that
       there are services on the channel.";
  }

  identity load-based-power-module-scheduling {
    base energy-saving-method;
    description
      "Power modules intelligently schedule internal power supply
       based on the power load. When the power load decreases,
       some power supplies are automatically disabled.

       When the power load increases, the disabled power supplies
       are enabled again. ";
  }

  identity load-based-board-scheduling {
    base energy-saving-method;
    description
      "Boards intelligently schedule internal forwarding resources
       based on the service load. When the service load decreases,
       some forwarding resources are automatically disabled or the
       working frequency of the forwarding resources is reduced.

       When the service load increases, the disabled forwarding
       resources are enabled again or the working frequency of
       forwarding resources is improved. In the case of burst
       traffic, packet forwarding may be delayed, but packets
       will not be lost.";
  }

  identity energy-saving-oper-state {
    description
      "Base identity for energy-saving-oper-state.";
  }

  identity energy-saving {
    base energy-saving-oper-state;
    description
      "Identity to indicate support of energy-saving mode.";
  }

  identity unsupported {
    base energy-saving-oper-state;
    description
      "Indicates that the device does not support energy-saving
       mode or does not have enough resources.";
  }

  identity deactivated {
    base energy-saving-oper-state;
    description
      "Indicates teh saving mode is deactivated.";
  }

  identity activated {
    base energy-saving-oper-state;
    description
      "Indicates that the energy saving is running.";
  }

  typedef energy-saving-operator {
    type enumeration {
      enum on {
        value 1;
        description
          "Power-on for energy saving.";
      }
      enum off {
        value 2;
        description
          "Power-off for energy saving.";
      }
    }
    description
      "Energy saving operator.";
  }

  grouping network-element-ref {
    description
      "Contains the information necessary to reference a network
       element.";
    leaf ne-ref {
      type leafref {
        path "/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-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;
  }

  grouping energy-consumption-data {
    description
      "Grouping for energy monitoring.";
    leaf average-power {
      type yang:gauge64;
      units "mW";
      description
        "The average consumed power.";
    }
    leaf saved-power {
      type yang:gauge64;
      units "mW";
      description
        "The saved power.";
    }
    leaf current-power {
      type yang:gauge64;
      units "mW";
      description
        "The current observed consumed power.";
    }
    leaf current-volts {
      type int32;
      units "mV";
      description
        "The current volts.";
    }
    leaf current-amperes {
      type int32;
      units "mA";
      description
        "The current amperes.";
    }
    leaf temperature {
      type int32;
      units "0.01 C";
      description
        "The current temperature of the component.";
    }
  }

  grouping energy-saving-modes {
    description
      "Grouping for energy saving mode and methods.";
    leaf-list energy-saving-mode {
      type identityref {
        base energy-saving-mode;
      }
      description
        "The energy saving mode.";
    }
    leaf-list energy-saving-method {
      type identityref {
        base energy-saving-method;
      }
      description
        "The energy saving method.";
    }
  }

  grouping energy-parameters {
    description
      "Grouping for energy paramters.";
    leaf temperature-upper-bound {
      type int32;
      units "0.01 C";
      description
        "The upper bound overheat temperature of the component.

         Upon the upper bound is exceeded, an alarm will be
         triggered to indicate fatal failure.";
    }
    leaf temperature-middle-bound {
      type int32;
      units "0.01 C";
      description
        "The middle bound overheat temperature of the component.

         Upon the middle bound is exceeded, an alarm will be
         triggered.";
    }
    leaf temperature-lower-bound {
      type int32;
      units "0.01 C";
      description
        "The lower bound overheat temperature of the component.

         Upon the lower bound is exceeded, the alarm will be
         triggered.";
    }
    leaf rated-power {
      type yang:gauge64;
      units "mW";
      description
        "The rated power.";
    }
    leaf expected-volts {
      type int32;
      units "mV";
      description
        "The expected volts.";
    }
    leaf low-volts-bound {
      type int32;
      units "mV";
      description
        "The lower volts bound which might cause equipment
         misbehavior or even damage.";
    }
    leaf low-volts-fatal {
      type int32;
      units "mV";
      description
        "The lowest volts bound which might cause equipment fatal
         damage.";
    }
    leaf high-volts-bound {
      type int32;
      units "mV";
      description
        "The higher volts bound which should trigger an alarm.";
    }
    leaf high-volts-fatal {
      type int32;
      units "mV";
      description
        "The highest volts bound of monitoring class which
         will cause fatal failure.";
    }
  }

  augment "/nw:networks/nw:network/nw:node" {
    if-feature "energy-saving";
    description
      "Energy monitoring data for network element.";
    container energy-power-consumption {
      config false;
      description
        "Statistics data about energy and power monitoring.";
      leaf total-energy-consumption {
        type yang:gauge64;
        units "Wh";
        description
          "Accumulated energy consumption of equipment.";
      }
      leaf saved-energy {
        type yang:gauge64;
        units "Wh";
        description
          "Saved energy consumption of equipment.";
      }
      leaf eer {
        type decimal64 {
          fraction-digits 18;
        }
        units "Gbps/Watt";
        description
          "The energy efficiency rating (EER) is a metric
           generally defined as a functional unit divided by
           the energy used.";
      }
    }
    container energy-saving-modes {
      description
        "List of the energy saving mode.";
      uses energy-saving-modes;
    }
  }

  augment "/ni:network-elements/ni:network-element" {
    if-feature "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 energy-saving-modes;
      }
    }
  }

  augment "/ni:network-elements/ni:network-element/ni:components"
        + "/ni:component" {
    if-feature "energy-saving";
    description
      "Energy management static data for component.";
    container energy-parameters {
      config false;
      description
        "Energy parameter monitoring.";
      uses energy-parameters;
    }
  }

  container component-energy-monitoring {
    description
      "Energy monitoring data for components.";
    container energy-consumption {
      description
        "Statistics of component about energy monitoring.";
      uses energy-consumption-data;
    }
    container energy-saving {
      description
        "Controls energy saving parameters of a component.";
      leaf enabled {
        type boolean;
        default "true";
        description
          "Controls whether the energy-saving
           of the component is enabled (when set to true)
           or disabled (set to false).";
      }
      leaf oper-state {
        type identityref {
          base energy-saving-oper-state;
        }
        description
          "The device energy saving operator state.";
      }
    }
    container inventory-component-ref {
      description
        "The reference of the component from which this
         termination point is abstracted.";
      uses component-ref;
    }
  }
}
<CODE ENDS>

5.1. Security Considerations

This section uses the template described in Section 3.7 of [I-D.ietf-netmod-rfc8407bis].

The YANG modules specified in this document define a schema for data that is designed to be accessed via network management protocol 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 Network Configuration Access Control Model (NACM) [RFC8341] provides the means to restrict access for particular NETCONF or RESTCONF users to a preconfigured subset of all available NETCONF or RESTCONF protocol operations and content.

There are several data nodes defined in this YANG module that are writable/creatable/deletable (i.e., config true, which is the default). These data nodes may be considered sensitive or vulnerable in some network environments. Write operations (e.g., edit-config) to these data nodes without proper protection can have a negative effect on network operations. Specifically, the following subtrees and data nodes have particular sensitivities/vulnerabilities:

/em:energy-management/em:energy-saving-mode:

This leaf specifies the energy saving mode set globally on a device.

/em:energy-saving/em:enable:

This leaf enable/disables energy saving state of specific component.

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':

....

6. IANA Considerations

6.1. The "IETF XML" Registry

This document requests IANA to register the following URI in the "ns" subregistry within the "IETF XML Registry" [RFC3688]:

   URI: urn:ietf:params:xml:ns:yang:ietf-energy-saving-mgt
   Registrant Contact: The IESG.
   XML: N/A, the requested URIs are XML namespaces.

6.2. The "YANG Module Names" Registry

This document requests IANA to register the following YANG module in the "YANG Module Names" registry [RFC6020] within the "YANG Parameters" registry group.

   name: ietf-energy-saving-management
   prefix: em
   namespace: urn:ietf:params:xml:ns:yang:ietf-energy-saving-mgt
   Maintained by IANA? N
   Reference: RFC XXXX

7. References

7.1. 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-00, , <https://datatracker.ietf.org/doc/html/draft-ietf-ivy-network-inventory-yang-00>.
[RFC2119]
Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, DOI 10.17487/RFC2119, , <https://www.rfc-editor.org/rfc/rfc2119>.
[RFC3688]
Mealling, M., "The IETF XML Registry", BCP 81, RFC 3688, DOI 10.17487/RFC3688, , <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, , <https://www.rfc-editor.org/rfc/rfc6020>.
[RFC6241]
Enns, R., Ed., Bjorklund, M., Ed., Schoenwaelder, J., Ed., and A. Bierman, Ed., "Network Configuration Protocol (NETCONF)", RFC 6241, DOI 10.17487/RFC6241, , <https://www.rfc-editor.org/rfc/rfc6241>.
[RFC6242]
Wasserman, M., "Using the NETCONF Protocol over Secure Shell (SSH)", RFC 6242, DOI 10.17487/RFC6242, , <https://www.rfc-editor.org/rfc/rfc6242>.
[RFC8040]
Bierman, A., Bjorklund, M., and K. Watsen, "RESTCONF Protocol", RFC 8040, DOI 10.17487/RFC8040, , <https://www.rfc-editor.org/rfc/rfc8040>.
[RFC8174]
Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC 2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174, , <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, , <https://www.rfc-editor.org/rfc/rfc8341>.
[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, , <https://www.rfc-editor.org/rfc/rfc8345>.
[RFC8446]
Rescorla, E., "The Transport Layer Security (TLS) Protocol Version 1.3", RFC 8446, DOI 10.17487/RFC8446, , <https://www.rfc-editor.org/rfc/rfc8446>.

7.2. Informative References

[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-01, , <https://datatracker.ietf.org/doc/html/draft-cx-opsawg-green-metrics-01>.
[I-D.ietf-netmod-rfc8407bis]
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-07, , <https://datatracker.ietf.org/doc/html/draft-ietf-netmod-rfc8407bis-07>.
[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, , <https://datatracker.ietf.org/doc/html/draft-manral-bmwg-power-usage-04>.
[RFC8340]
Bjorklund, M. and L. Berger, Ed., "YANG Tree Diagrams", BCP 215, RFC 8340, DOI 10.17487/RFC8340, , <https://www.rfc-editor.org/rfc/rfc8340>.

Acknowledgments

This work has benefited from the discussions that occured 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] provides suggestions for measuring power usage of live networks under different traffic loads and various switch router configuration settings.

Authors' Addresses

Gen Chen
Huawei
China
Qin Wu
Huawei
China
Mohamed Boucadair
Orange
France
Oscar Gonzales de Dios
Telefonica I+D
Spain
Carlos Pignataro
North Carolina State University
United States of America