Internet Engineering Task Force (IETF) M. Chandramouli
Request for Comments: 7460 B. Claise
Category: Standards Track Cisco Systems, Inc.
ISSN: 2070-1721 B. Schoening
Independent Consultant
J. Quittek
T. Dietz
NEC Europe, Ltd.
March 2015
Monitoring and Control MIB for Power and Energy
Abstract
This document defines a subset of the Management Information Base
(MIB) for power and energy monitoring of devices.
Status of This Memo
This is an Internet Standards Track document.
This document is a product of the Internet Engineering Task Force
(IETF). It represents the consensus of the IETF community. It has
received public review and has been approved for publication by the
Internet Engineering Steering Group (IESG). Further information on
Internet Standards is available in Section 2 of RFC 5741.
Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
http://www.rfc-editor.org/info/rfc7460.
Copyright Notice
Copyright (c) 2015 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
(http://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 Simplified BSD License text as described in Section 4.e of
the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
Chandramouli, et al. Standards Track [Page 1]RFC 7460 Power/Energy Monitoring and Control MIB March 2015
Table of Contents
1. Introduction ....................................................3
1.1. Conventions Used in This Document ..........................3
2. The Internet-Standard Management Framework ......................3
3. Use Cases .......................................................4
4. Terminology .....................................................4
5. Architecture Concepts Applied to the MIB Modules ................5
5.1. Energy Object Tables .......................................5
5.1.1. ENERGY-OBJECT-MIB ...................................5
5.1.2. POWER-ATTRIBUTES-MIB ................................7
5.1.3. UML Diagram .........................................9
5.2. Energy Object Identity ....................................12
5.3. Power State ...............................................12
5.3.1. Power State Set ....................................13
5.4. Energy Object Usage Information ...........................13
5.5. Optional Power Usage Attributes ...........................14
5.6. Optional Energy Measurement ...............................14
5.7. Fault Management ..........................................18
6. Discovery ......................................................18
7. Link with the Other IETF MIBs ..................................19
7.1. Link with the ENTITY-MIB and the ENTITY-SENSOR MIB ........19
7.2. Link with the ENTITY-STATE MIB ............................20
7.3. Link with the POWER-OVER-ETHERNET MIB .....................21
7.4. Link with the UPS MIB .....................................21
7.5. Link with the LLDP and LLDP-MED MIBs ......................22
8. Structure of the MIB ...........................................23
9. MIB Definitions ................................................24
9.1. The IANAPowerStateSet-MIB Module ..........................24
9.2. The ENERGY-OBJECT-MIB MIB Module ..........................27
9.3. The POWER-ATTRIBUTES-MIB MIB Module .......................50
10. Security Considerations .......................................63
11. IANA Considerations ...........................................64
11.1. IANAPowerStateSet-MIB Module .............................65
12. References ....................................................65
12.1. Normative References .....................................65
12.2. Informative References ...................................66
Acknowledgments ...................................................68
Contributors ......................................................68
Authors' Addresses ................................................69
Chandramouli, et al. Standards Track [Page 2]RFC 7460 Power/Energy Monitoring and Control MIB March 2015
1. Introduction
This document defines a subset of the Management Information Base
(MIB) for use in energy management of devices within or connected to
communication networks. The MIB modules in this document are
designed to provide a model for energy management, which includes
monitoring for Power State and energy consumption of networked
elements. This MIB takes into account the "Energy Management
Framework" [RFC7326], which, in turn, is based on the "Requirements
for Energy Management" [RFC6988].
Energy management can be applied to devices in communication
networks. Target devices for this specification include (but are not
limited to) routers, switches, Power over Ethernet (PoE) endpoints,
protocol gateways for building management systems, intelligent
meters, home energy gateways, hosts and servers, sensor proxies, etc.
Target devices and the use cases for Energy Management are discussed
in Energy Management Applicability Statement [EMAN-AS].
Where applicable, device monitoring extends to the individual
components of the device and to any attached dependent devices. For
example, a device can contain components that are independent from a
Power State point of view, such as line cards, processor cards, hard
drives. A device can also have dependent attached devices, such as a
switch with PoE endpoints or a power distribution unit with attached
endpoints.
1.1. Conventions Used in This Document
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 RFC
2119 [RFC2119].
2. The Internet-Standard Management Framework
For a detailed overview of the documents that describe the current
Internet-Standard Management Framework, please refer to section 7 of
RFC 3410 [RFC3410].
Managed objects are accessed via a virtual information store, termed
the Management Information Base or MIB. MIB objects are generally
accessed through the Simple Network Management Protocol (SNMP).
Objects in the MIB are defined using the mechanisms defined in the
Structure of Management Information (SMI). This memo specifies MIB
modules that are compliant to SMIv2, which is described in STD 58,
RFC 2578 [RFC2578], STD 58, RFC 2579 [RFC2579] and STD 58, RFC 2580
[RFC2580].
Chandramouli, et al. Standards Track [Page 3]
RFC 7460 Power/Energy Monitoring and Control MIB March 2015
3. Use Cases
Requirements for power and energy monitoring for networking devices
are specified in [RFC6988]. The requirements in [RFC6988] cover
devices typically found in communications networks, such as switches,
routers, and various connected endpoints. For a power monitoring
architecture to be useful, it should also apply to facility meters,
power distribution units, gateway proxies for commercial building
control, home automation devices, and devices that interface with the
utility and/or smart grid. Accordingly, the scope of the MIB modules
in this document are broader than that specified in [RFC6988].
Several use cases for Energy Management have been identified in the
"Energy Management (EMAN) Applicability Statement" [EMAN-AS].
4. Terminology
Please refer to [RFC7326] for the definitions of the following
terminology used in this document.
Energy Management
Energy Management System (EnMS)
Energy Monitoring
Energy Control
electrical equipment
non-electrical equipment (mechanical equipment)
device
component
power inlet
power outlet
energy
power
demand
provide energy
receive energy
meter (energy meter)
battery
Power Interface
Nameplate Power
Power Attributes
Power Quality
Power State
Power State Set
Chandramouli, et al. Standards Track [Page 4]RFC 7460 Power/Energy Monitoring and Control MIB March 2015
5. Architecture Concepts Applied to the MIB Modules
This section describes the concepts specified in the Energy
Management Framework [RFC7326] that pertain to power usage, with
specific information related to the MIB module specified in this
document. This subsection maps concepts developed in the Energy
Management Framework [RFC7326].
The Energy Monitoring MIB has two independent MIB modules: ENERGY-
OBJECT-MIB and POWER-ATTRIBUTES-MIB. The first, ENERGY-OBJECT-MIB,
is focused on measurement of power and energy. The second, POWER-
ATTRIBUTES-MIB, is focused on power quality measurements for Energy
Objects.
Devices and their sub-components can be modeled using the containment
tree of the ENTITY-MIB [RFC6933].
5.1. Energy Object Tables
5.1.1. ENERGY-OBJECT-MIB
The ENERGY-OBJECT-MIB module consists of five tables.
The first table is the eoMeterCapabilitiesTable. It indicates the
instrumentation available for each Energy Object. Entries in this
table indicate which other tables from the ENERGY-OBJECT-MIB and
POWER-ATTRIBUTES-MIB are available for each Energy Object. The
eoMeterCapabilitiesTable is indexed by entPhysicalIndex [RFC6933].
The second table is the eoPowerTable. It reports the power
consumption of each Energy Object as well as the units, sign,
measurement accuracy, and related objects. The eoPowerTable is
indexed by entPhysicalIndex.
The third table is the eoPowerStateTable. For each Energy Object, it
reports information and statistics about the supported Power States.
The eoPowerStateTable is indexed by entPhysicalIndex and
eoPowerStateIndex.
The fourth table is the eoEnergyParametersTable. The entries in this
table configure the parameters of energy and demand measurement
collection. This table is indexed by eoEnergyParametersIndex.
The fifth table is the eoEnergyTable. The entries in this table
provide a log of the energy and demand information. This table is
indexed by eoEnergyParametersIndex.
Chandramouli, et al. Standards Track [Page 5]
RFC 7460 Power/Energy Monitoring and Control MIB March 2015
A "smidump-style" tree presentation of the MIB modules contained in
the document is presented. The meaning of the three symbols is a
compressed representation of the object's MAX-ACCESS clause, which
may have the following values:
"not-accessible" -> "---"
"accessible-for-notify" -> "--n"
"read-only" -> "r-n"
"read-write" -> "rwn"
eoMeterCapabilitiesTable(1)
|
+---eoMeterCapabilitiesEntry(1)[entPhysicalIndex]
| |
| +---r-n BITS eoMeterCapability
|
eoPowerTable(2)
|
+---eoPowerEntry(1) [entPhysicalIndex]
| |
| +---r-n Integer32 eoPower(1)
| +-- r-n Unsigned32 eoPowerNamePlate(2)
| +-- r-n UnitMultiplier eoPowerUnitMultiplier(3)
| +-- r-n Integer32 eoPowerAccuracy(4)
| +-- r-n INTEGER eoPowerMeasurementCaliber(5)
| +-- r-n INTEGER eoPowerCurrentType(6)
| +-- r-n TruthValue eoPowerMeasurementLocal(7)
| +-- rwn PowerStateSet eoPowerAdminState(8)
| +-- r-n PowerStateSet eoPowerOperState(9)
| +-- r-n OwnerString eoPowerStateEnterReason(10)
|
|
|
+---eoPowerStateTable(3)
|
| +--eoPowerStateEntry(1)
| | [entPhysicalIndex, eoPowerStateIndex]
| |
| +-- --n PowerStateSet eoPowerStateIndex(1)
| +-- r-n Integer32 eoPowerStateMaxPower(2)
| +-- r-n UnitMultiplier
| eoPowerStatePowerUnitMultiplier(3)
| +-- r-n TimeTicks eoPowerStateTotalTime(4)
| +-- r-n Counter32 eoPowerStateEnterCount(5)
|
+eoEnergyParametersTable(4)
|
Chandramouli, et al. Standards Track [Page 6]RFC 7460 Power/Energy Monitoring and Control MIB March 2015
+---eoEnergyParametersEntry(1) [eoEnergyParametersIndex]
|
| +-- --n PhysicalIndex eoEnergyObjectIndex(1)
| + r-n Integer32 eoEnergyParametersIndex(2)
| +-- rwn TimeInterval eoEnergyParametersIntervalLength(3)
| +-- rwn Unsigned32 eoEnergyParametersIntervalNumber(4)
| +-- rwn INTEGER eoEnergyParametersIntervalMode(5)
| +-- rwn TimeInterval eoEnergyParametersIntervalWindow(6)
| +-- rwn Unsigned32 eoEnergyParametersSampleRate(7)
| +-- rwn StorageType eoEnergyParametersStorageType(8)
| +-- rwn RowStatus eoEnergyParametersStatus(9)
|
+eoEnergyTable(5)
|
+---eoEnergyEntry(1)
| [eoEnergyParametersIndex,eoEnergyCollectionStartTime]
|
| +-- r-n TimeTicks eoEnergyCollectionStartTime(1)
| +-- r-n Unsigned32 eoEnergyConsumed(2)
| +-- r-n Unsigned32 eoEnergyProvided(3)
| +-- r-n Unsigned32 eoEnergyStored(4)
| +-- r-n UnitMultiplier eoEnergyUnitMultiplier(5)
| +-- r-n Integer32 eoEnergyAccuracy(6)
| +-- r-n Unsigned32 eoEnergyMaxConsumed(7)
| +-- r-n Unsigned32 eoEnergyMaxProduced(8)
| +-- r-n TimeTicks eoEnergyDiscontinuityTime(9)
5.1.2. POWER-ATTRIBUTES-MIB
The POWER-ATTRIBUTES-MIB module consists of three tables.
The first table is the eoACPwrAttributesTable. It indicates the
power quality available for each Energy Object. The
eoACPwrAttributesTable is indexed by entPhysicalIndex [RFC6933].
The second table is the eoACPwrAttributesDelPhaseTable. The entries
in this table configure the parameters of energy and demand
measurement collection. This table is indexed by
eoEnergyParametersIndex.
The third table is the eoACPwrAttributesWyePhaseTable. For each
Energy Object, it reports information and statistics about the
supported Power States. The eoPowerStateTable is indexed by
entPhysicalIndex and eoPowerStateIndex.
Chandramouli, et al. Standards Track [Page 7]RFC 7460 Power/Energy Monitoring and Control MIB March 2015
eoACPwrAttributesTable(1)
|
+---eoACPwrAttributesEntry(1) [ entPhysicalIndex]
| |
| +---r-n INTEGER eoACPwrAttributesConfiguration(1)
| +-- r-n Integer32 eoACPwrAttributesAvgVoltage(2)
| +-- r-n Unsigned32 eoACPwrAttributesAvgCurrent(3)
| +-- r-n Integer32 eoACPwrAttributesFrequency(4)
| +-- r-n UnitMultiplier
| eoACPwrAttributesPowerUnitMultiplier(5)
| +-- r-n Integer32 eoACPwrAttributesPowerAccuracy(6)
| +-- r-n Integer32
| eoACPwrAttributesTotalActivePower(7)
| +-- r-n Integer32
| eoACPwrAttributesTotalReactivePower(8)
| +-- r-n Integer32
| eoACPwrAttributesTotalApparentPower(9)
| +-- r-n Integer32
| eoACPwrAttributesTotalPowerFactor(10)
| +-- r-n Integer32 eoACPwrAttributesThdCurrent(11)
| +-- r-n Integer32 eoACPwrAttributesThdVoltage(12)
|
+eoACPwrAttributesDelPhaseTable(2)
|
+-- eoACPwrAttributesDelPhaseEntry(1)
| | [entPhysicalIndex, eoACPwrAttributesDelPhaseIndex]
| |
| +-- r-n Integer32
| | eoACPwrAttributesDelPhaseIndex(1)
| +-- r-n Integer32
| | eoACPwrAttributesDelPhaseToNextPhaseVoltage(2)
| +-- r-n Integer32
| | eoACPwrAttributesDelThdPhaseToNextPhaseVoltage(3)
| |
+eoACPwrAttributesWyePhaseTable(3)
|
+-- eoACPwrAttributesWyePhaseEntry(1)
| | [entPhysicalIndex, eoACPwrAttributesWyePhaseIndex]
| |
| +-- r-n Integer32
| | eoACPwrAttributesWyePhaseIndex(1)
| +-- r-n Integer32
| | eoACPwrAttributesWyePhaseToNeutralVoltage(2)
| +-- r-n Integer32
| | eoACPwrAttributesWyeCurrent(3)
| +-- r-n Integer32
| | eoACPwrAttributesWyeActivePower(4)
Chandramouli, et al. Standards Track [Page 8]RFC 7460 Power/Energy Monitoring and Control MIB March 2015
| +-- r-n Integer32
| | eoACPwrAttributesWyeReactivePower(5)
| +-- r-n Integer32
| | eoACPwrAttributesWyeApparentPower(6)
| +-- r-n Integer32
| | eoACPwrAttributesWyePowerFactor(7)
| +-- r-n Integer32
| | eoACPwrAttributesWyeThdCurrent(9)
| +-- r-n Integer32
| | eoACPwrAttributesWyeThdPhaseToNeutralVoltage(10)
5.1.3. UML Diagram
A Unified Modeling Language (UML) diagram representation of the MIB
objects in the two MIB modules, ENERGY-OBJECT-MIB and POWER-
ATTRIBUTES-MIB, is presented.
+-----------------------+
| Meter Capabilities |
| --------------------- |
| eoMeterCapability |
+-----------------------+
+-----------------------+
|---> | Energy Object ID (*) |
| | --------------------- |
| | entPhysicalIndex |
| | entPhysicalClass |
| | entPhysicalName |
| | entPhysicalUUID |
| +-----------------------+
|
| +---------------------------+
|---- |_ Power Table |
| | ------------------------- |
| | eoPower |
| | eoPowerNamePlate |
| | eoPowerUnitMultiplier |
| | eoPowerAccuracy |
| | eoPowerMeasurementCaliber |
| | eoPowerCurrentType |
| | eoPowerMeasurementLocal |
| | eoPowerAdminState |
| | eoPowerOperState |
| | eoPowerStateEnterReason |
| +---------------------------+
Chandramouli, et al. Standards Track [Page 9]RFC 7460 Power/Energy Monitoring and Control MIB March 2015
| +---------------------------------+
|---- |_Energy Object State Statistics |
| |-------------------------------- |
| | eoPowerStateIndex |
| | eoPowerStateMaxPower |
| | eoPowerStatePowerUnitMultiplier |
| | eoPowerStateTotalTime |
| | eoPowerStateEnterCount |
| +---------------------------------+
|
| +----------------------------------+
|---- | Energy ParametersTable |
| | -------------------------------- |
| | eoEnergyObjectIndex |
| | eoEnergyParametersIndex |
| | eoEnergyParametersIntervalLength |
| | eoEnergyParametersIntervalNumber |
| | eoEnergyParametersIntervalMode |
| | eoEnergyParametersIntervalWindow |
| | eoEnergyParametersSampleRate |
| | eoEnergyParametersStorageType |
| | eoEnergyParametersStatus |
| +----------------------------------+
|
| +----------------------------------+
|---- | Energy Table |
| -------------------------------- |
| eoEnergyCollectionStartTime |
| eoEnergyConsumed |
| eoEnergyProvided |
| eoEnergyStored |
| eoEnergyUnitMultiplier |
| eoEnergyAccuracy |
| eoEnergyMaxConsumed |
| eoEnergyMaxProduced |
| eoDiscontinuityTime |
+----------------------------------+
Figure 1: UML Diagram for energyObjectMib
(*) Compliance with the ENERGY-OBJECT-CONTEXT-MIB
Chandramouli, et al. Standards Track [Page 10]RFC 7460 Power/Energy Monitoring and Control MIB March 2015
+-----------------------+
|---> | Energy Object ID (*) |
| | --------------------- |
| | entPhysicalIndex |
| | entPhysicalName |
| | entPhysicalUUID |
| +-----------------------+
| +--------------------------------------+
|---- | Power Attributes |
| | ------------------------------------ |
| | eoACPwrAttributesConfiguration |
| | eoACPwrAttributesAvgVoltage |
| | eoACPwrAttributesAvgCurrent |
| | eoACPwrAttributesFrequency |
| | eoACPwrAttributesPowerUnitMultiplier |
| | eoACPwrAttributesPowerAccuracy |
| | eoACPwrAttributesTotalActivePower |
| | eoACPwrAttributesTotalReactivePower |
| | eoACPwrAttributesTotalApparentPower |
| | eoACPwrAttributesTotalPowerFactor |
| | eoACPwrAttributesThdCurrent |
| | eoACPwrAttributesThdVoltage |
| +--------------------------------------+
| +------------------------------------------------+
|---- | AC Input DEL Configuration |
| | ---------------------------------------------- |
| | eoACPwrAttributesDelPhaseIndex |
| | eoACPwrAttributesDelPhaseToNextPhaseVoltage |
| | eoACPwrAttributesDelThdPhaseToNextPhaseVoltage |
| +------------------------------------------------+
|
| +----------------------------------------------+
|---- | AC Input WYE Configuration |
| -------------------------------------------- |
| eoACPwrAttributesWyePhaseIndex |
| eoACPwrAttributesWyePhaseToNeutralVoltage |
| eoACPwrAttributesWyeCurrent |
| eoACPwrAttributesWyeActivePower |
| eoACPwrAttributesWyeReactivePower |
| eoACPwrAttributesWyeApparentPower |
| eoACPwrAttributesWyePowerFactor |
| eoACPwrAttributesWyeThdCurrent |
| eoACPwrAttributesWyeThdPhaseToNeutralVoltage |
+----------------------------------------------+
Figure 2: UML Diagram for the POWER-ATTRIBUTES-MIB
(*) Compliance with the ENERGY-OBJECT-CONTEXT-MIB
Chandramouli, et al. Standards Track [Page 11]RFC 7460 Power/Energy Monitoring and Control MIB March 2015
5.2. Energy Object Identity
The Energy Object identity information is specified in the ENERGY-
OBJECT-CONTEXT-MIB module [RFC7461] primary table, i.e., the eoTable.
In this table, Energy Object context such as domain, role
description, and importance are specified. In addition, the ENERGY-
OBJECT-CONTEXT-MIB module specifies the relationship between Energy
Objects. There are several possible relationships between Energy
Objects, such as meteredBy, metering, poweredBy, powering,
aggregatedBy, and aggregating as defined in the IANA-ENERGY-RELATION-
MIB module [RFC7461].
5.3. Power State
An Energy Object may have energy-conservation modes called "Power
States". There may be several intermediate energy-saving modes
between the ON and OFF states of a device.
Power States, which represent universal states of power management of
an Energy Object, are specified by the eoPowerState MIB object. The
actual Power State is specified by the eoPowerOperState MIB object,
while the eoPowerAdminState MIB object specifies the Power State
requested for the Energy Object. The difference between the values
of eoPowerOperState and eoPowerAdminState indicates that the Energy
Object is busy transitioning from eoPowerAdminState into the
eoPowerOperState, at which point it will update the content of
eoPowerOperState. In addition, the possible reason for a change in
Power State is reported in eoPowerStateEnterReason. Regarding
eoPowerStateEnterReason, management stations and Energy Objects
should support any format of the owner string dictated by the local
policy of the organization. It is suggested that this name contain
at least the reason for the transition change, and one or more of the
following: IP address, management station name, network manager's
name, location, or phone number.
The MIB objects eoPowerOperState, eoPowerAdminState, and
eoPowerStateEnterReason are contained in the eoPowerTable.
eoPowerStateTable enumerates the maximum power usage in watts for
every single supported Power State of each Power State Set supported
by the Energy Object. In addition, eoPowerStateTable provides
additional statistics such as eoPowerStateEnterCount, i.e., the
number of times an entity has visited a particular Power State, and
eoPowerStateTotalTime, i.e., the total time spent in a particular
Power State of an Energy Object.
Chandramouli, et al. Standards Track [Page 12]
RFC 7460 Power/Energy Monitoring and Control MIB March 2015
5.3.1. Power State Set
There are several standards and implementations of Power State Sets.
An Energy Object can support one or multiple Power State Set
implementations concurrently.
There are currently three Power State Sets defined:
IEEE1621(256) - [IEEE1621]
DMTF(512) - [DMTF]
EMAN(768) - [RFC7326]
The Power State Sets are listed in [RFC7326] along with each Power
State within the Power Set. The Power State Sets are specified by
the PowerStateSet Textual Convention (TC) as an IANA-maintained MIB
module. The initial version of this MIB module is specified in this
document.
5.4. Energy Object Usage Information
For an Energy Object, power usage is reported using eoPower. The
magnitude of measurement is based on the eoPowerUnitMultiplier MIB
variable, based on the UnitMultiplier TC. Power measurement
magnitude should conform to the IEC 62053-21 [IEC.62053-21] and IEC
62053-22 [IEC.62053-22] definition of unit multiplier for the SI
units of measure (where SI is the International System of Units).
Measured values are represented in SI units obtained by BaseValue *
10 raised to the power of the unit multiplier.
For example, if current power usage of an Energy Object is 3, it
could be 3 W, 3 mW, 3 kW, or 3 MW, depending on the value of
eoPowerUnitMultiplier. Note that other measurements throughout the
two MIB modules in this document use the same mechanism, including
eoPowerStatePowerUnitMultiplier, eoEnergyUnitMultiplier, and
oACPwrAttributesPowerUnitMultiplier.
In addition to knowing the usage and magnitude, it is useful to know
how an eoPower measurement was obtained. A Network Management System
(NMS) can use this to account for the accuracy and nature of the
reading between different implementations. eoPowerMeasurementLocal
describes whether the measurements were made at the device itself or
from a remote source. The eoPowerMeasurementCaliber describes the
method that was used to measure the power and can distinguish actual
or estimated values. There may be devices in the network that may
not be able to measure or report power consumption. For those
devices, the object eoPowerMeasurementCaliber shall report that the
measurement mechanism is "unavailable" and the eoPower measurement
shall be "0".
Chandramouli, et al. Standards Track [Page 13]RFC 7460 Power/Energy Monitoring and Control MIB March 2015
The nameplate power rating of an Energy Object is specified in
eoPowerNameplate MIB object.
5.5. Optional Power Usage Attributes
The optional POWER-ATTRIBUTES-MIB module can be implemented to
further describe power attributes usage measurement. The POWER-
ATTRIBUTES-MIB module is aligned with the IEC 61850 7-2 standard to
describe alternating current (AC) measurements.
The POWER-ATTRIBUTES-MIB module contains a primary table,
eoACPwrAttributesTable, that defines power attributes measurements
for supported entPhysicalIndex entities, as a sparse extension of the
eoPowerTable (with entPhysicalIndex as primary index). This
eoACPwrAttributesTable table contains such information as the
configuration (single phase, DEL 3 phases, WYE 3 phases), frequency,
power accuracy, total active/reactive power/apparent power, amperage,
and voltage.
In case of three-phase power, an additional table is populated with
power attributes measurements per phase (hence, double indexed by the
entPhysicalIndex and a phase index). This table, describes
attributes specific to either WYE or DEL configurations.
In a DEL configuration, the eoACPwrAttributesDelPhaseTable describes
the phase-to-phase power attributes measurements, i.e., voltage. In
a DEL configuration, the current is equal in all three phases.
In a WYE configuration, the eoACPwrAttributesWyePhaseTable describes
the phase-to-neutral power attributes measurements, i.e., voltage,
current, active/reactive/apparent power, and power factor.
5.6. Optional Energy Measurement
It is only relevant to measure energy and demand when there are
actual power measurements obtained from measurement hardware. If the
eoPowerMeasurementCaliber MIB object has values of unavailable,
unknown, estimated, or presumed, then the energy and demand values
are not useful.
Two tables are introduced to characterize energy measurement of an
Energy Object: eoEnergyTable and eoEnergyParametersTable. Both
energy and demand information can be represented via the
eoEnergyTable. Demand information can be represented. The
eoEnergyParametersTable consists of the parameters defining
eoEnergyParametersIndex -- an index for the Energy Object,
eoEnergyObjectIndex -- linked to the entPhysicalIndex of the Energy
Object, the duration of measurement intervals in seconds,
Chandramouli, et al. Standards Track [Page 14]
RFC 7460 Power/Energy Monitoring and Control MIB March 2015
(eoEnergyParametersIntervalLength), the number of successive
intervals to be stored in the eoEnergyTable,
(eoEnergyParametersIntervalNumber), the type of measurement technique
(eoEnergyParametersIntervalMode), and a sample rate used to calculate
the average (eoEnergyParametersSampleRate). Judicious choice of the
sampling rate will ensure accurate measurement of energy while not
imposing an excessive polling burden.
There are three eoEnergyParametersIntervalMode types used for energy
measurement collection: period, sliding, and total. The choices of
the three different modes of collection are based on IEC standard
61850-7-4 [IEC.61850-7-4]. Note that multiple
eoEnergyParametersIntervalMode types MAY be configured
simultaneously. It is important to note that for a given Energy
Object, multiple modes (periodic, total, sliding window) of energy
measurement collection can be configured with the use of
eoEnergyParametersIndex. However, simultaneous measurement in
multiple modes for a given Energy Object depends on the Energy Object
capability.
These three eoEnergyParametersIntervalMode types are illustrated by
the following three figures, for which:
- The horizontal axis represents the current time, with the symbol
<--- L ---> expressing the eoEnergyParametersIntervalLength and
the eoEnergyCollectionStartTime is represented by S1, S2, S3,
S4, eoEnergyParametersIntervalNumber.
- The vertical axis represents the time interval of sampling and
the value of eoEnergyConsumed can be obtained at the end of the
sampling period. The symbol =========== denotes the duration of
the sampling period.
| | | =========== |
|============ | | |
| | | |
| |============ | |
| | | |
| <--- L ---> | <--- L ---> | <--- L ---> |
| | | |
S1 S2 S3 S4
Figure 3: Period eoEnergyParametersIntervalMode
Chandramouli, et al. Standards Track [Page 15]RFC 7460 Power/Energy Monitoring and Control MIB March 2015
A eoEnergyParametersIntervalMode type of 'period' specifies non-
overlapping periodic measurements. Therefore, the next
eoEnergyCollectionStartTime is equal to the previous
eoEnergyCollectionStartTime plus eoEnergyParametersIntervalLength.
S2=S1+L; S3=S2+L, ...
|============ |
| |
| <--- L ---> |
| |
| |============ |
| | |
| | <--- L ---> |
| | |
| | |============ |
| | | |
| | | <--- L ---> |
| | | |
| | | |============ |
| | | | |
| | | | <--- L ---> |
S1 | | | |
| | | |
| | | |
S2 | | |
| | |
| | |
S3 | |
| |
| |
S4
Figure 4: Sliding eoEnergyParametersIntervalMode
A eoEnergyParametersIntervalMode type of 'sliding' specifies
overlapping periodic measurements.
| |
|========================= |
| |
| |
| |
| <--- Total length ---> |
| |
S1
Figure 5: Total eoEnergyParametersIntervalMode
Chandramouli, et al. Standards Track [Page 16]RFC 7460 Power/Energy Monitoring and Control MIB March 2015
An eoEnergyParametersIntervalMode type of 'total' specifies a
continuous measurement since the last reset. The value of
eoEnergyParametersIntervalNumber should be (1) one and
eoEnergyParametersIntervalLength is ignored.
The eoEnergyParametersStatus is used to start and stop energy usage
logging. The status of this variable is "active" when all the
objects in eoEnergyParametersTable are appropriate, which, in turn,
indicates whether or not eoEnergyTable entries exist. Finally, the
eoEnergyParametersStorageType variable indicates the storage type for
this row, i.e., whether the persistence is maintained across a device
reload.
The eoEnergyTable consists of energy measurements of
eoEnergyConsumed, eoEnergyProvided and eoEnergyStored, unit scale of
measured energy with eoEnergyUnitMultiplier, percentage accuracy with
eoEnergyAccuracy, and the maximum observed energy within a window in
eoEnergyMaxConsumed, eoEnergyMaxProduced, and
eoEnergyDiscontinuityTime.
Measurements of the total energy consumed by an Energy Object may
suffer from interruptions in the continuous measurement of energy
consumption. In order to indicate such interruptions, the object
eoEnergyDiscontinuityTime is provided for indicating the time of the
last interruption of total energy measurement.
eoEnergyDiscontinuityTime shall indicate the sysUpTime [RFC3418] when
the device was reset.
The following example illustrates the eoEnergyTable and
eoEnergyParametersTable:
First, in order to estimate energy, a time interval to sample energy
should be specified, i.e., eoEnergyParametersIntervalLength can be
set to "900 seconds" or 15 minutes and the number of consecutive
intervals over which the maximum energy is calculated
(eoEnergyParametersIntervalNumber) as "10". The sampling rate
internal to the Energy Object for measurement of power usage
(eoEnergyParametersSampleRate) can be "1000 milliseconds", as set by
the Energy Object as a reasonable value. Then, the
eoEnergyParametersStatus is set to active to indicate that the Energy
Object should start monitoring the usage per the eoEnergyTable.
The indices for the eoEnergyTable are eoEnergyParametersIndex, which
identifies the index for the setting of energy measurement collection
Energy Object, and eoEnergyCollectionStartTime, which denotes the
start time of the energy measurement interval based on sysUpTime
[RFC3418]. The value of eoEnergyComsumed is the measured energy
consumption over the time interval specified
Chandramouli, et al. Standards Track [Page 17]
RFC 7460 Power/Energy Monitoring and Control MIB March 2015
(eoEnergyParametersIntervalLength) based on the Energy Object
internal sampling rate (eoEnergyParametersSampleRate). While
choosing the values for the eoEnergyParametersIntervalLength and
eoEnergyParametersSampleRate, it is recommended to take into
consideration both the network element resources adequate to process
and store the sample values and the mechanism used to calculate the
eoEnergyConsumed. The units are derived from eoEnergyUnitMultiplier.
For example, eoEnergyConsumed can be "100" with
eoEnergyUnitMultiplier equal to 0, the measured energy consumption of
the Energy Object is 100 watt-hours. The eoEnergyMaxConsumed is the
maximum energy observed and that can be "150 watt-hours".
The eoEnergyTable has a buffer to retain a certain number of
intervals, as defined by eoEnergyParametersIntervalNumber. If the
default value of "10" is kept, then the eoEnergyTable contains 10
energy measurements, including the maximum.
Here is a brief explanation of how the maximum energy can be
calculated. The first observed energy measurement value is taken to
be the initial maximum. With each subsequent measurement, based on
numerical comparison, maximum energy may be updated. The maximum
value is retained as long as the measurements are taking place.
Based on periodic polling of this table, an NMS could compute the
maximum over a longer period, e.g., a month, 3 months, or a year.
5.7. Fault Management
[RFC6988] specifies requirements about Power States such as "the
current Power State", "the time of the last state change", "the total
time spent in each state", "the number of transitions to each state",
etc. Some of these requirements are fulfilled explicitly by MIB
objects such as eoPowerOperState, eoPowerStateTotalTime, and
eoPowerStateEnterCount. Some of the other requirements are met via
the SNMP NOTIFICATION mechanism. eoPowerStateChange SNMP
notification which is generated when the value of oPowerStateIndex,
eoPowerOperState, or eoPowerAdminState have changed.
6. Discovery
It is probable that most Energy Objects will require the
implementation of the ENERGY-OBJECT-CONTEXT-MIB [RFC7461] as a
prerequisite for this MIB module. In such a case, the eoPowerTable
of the EMAN-ENERGY-OBJECT-MIB is cross-referenced with the eoTable of
ENERGY-OBJECT-CONTEXT-MIB via entPhysicalIndex. Every Energy Object
MUST implement entPhysicalIndex, entPhysicalClass, entPhysicalName,
and entPhysicalUUID from the ENTITY-MIB [RFC6933]. As the primary
Chandramouli, et al. Standards Track [Page 18]
RFC 7460 Power/Energy Monitoring and Control MIB March 2015
index for the Energy Object, entPhysicalIndex is used: it
characterizes the Energy Object in the ENERGY-OBJECT-MIB and the
POWER-ATTRIBUTES-MIB MIB modules (this document).
The NMS must first poll the ENERGY-OBJECT-CONTEXT-MIB MIB module
[RFC7461], if available, in order to discover all the Energy Objects
and the relationships between those Energy Objects. In the ENERGY-
OBJECT-CONTEXT-MIB module tables, the Energy Objects are indexed by
the entPhysicalIndex.
From there, the NMS must poll the eoPowerStateTable (specified in the
ENERGY-OBJECT-MIB module in this document), which enumerates, amongst
other things, the maximum power usage. As the entries in
eoPowerStateTable table are indexed by the Energy Object
(entPhysicalIndex) and by the Power State Set (eoPowerStateIndex),
the maximum power usage is discovered per Energy Object, and the
power usage per Power State of the Power State Set. In other words,
reading the eoPowerStateTable allows the discovery of each Power
State within every Power State Set supported by the Energy Object.
The MIB module may be populated with the Energy Object relationship
information, which have its own Energy Object index value
(entPhysicalIndex). However, the Energy Object relationship must be
discovered via the ENERGY-OBJECT-CONTEXT-MIB module.
Finally, the NMS can monitor the power attributes with the POWER-
ATTRIBUTES-MIB MIB module, which reuses the entPhysicalIndex to index
the Energy Object.
7. Link with the Other IETF MIBs
7.1. Link with the ENTITY-MIB and the ENTITY-SENSOR MIB
[RFC6933] defines the ENTITY-MIB module that lists the physical
entities of a networking device (router, switch, etc.) and those
physical entities indexed by entPhysicalIndex. From an energy-
management standpoint, the physical entities that consume or produce
energy are of interest.
[RFC3433] defines the ENTITY-SENSOR MIB module that provides a
standardized way of obtaining information (current value of the
sensor, operational status of the sensor, and the data-unit
precision) from sensors embedded in networking devices. Sensors are
associated with each index of the entPhysicalIndex of the ENTITY-MIB
[RFC6933]. While the focus of the Monitoring and Control MIB for
Power and Energy is on measurement of power usage of networking
equipment indexed by the ENTITY-MIB, this MIB supports a customized
Chandramouli, et al. Standards Track [Page 19]
RFC 7460 Power/Energy Monitoring and Control MIB March 2015
power scale for power measurement and different Power States of
networking equipment and the functionality to configure the Power
States.
The Energy Objects are modeled by the entPhysicalIndex through the
entPhysicalEntity MIB object specified in the eoTable in the ENERGY-
OBJECT-CONTEXT-MIB MIB module [RFC7461].
The ENTITY-SENSOR MIB [RFC3433] does not have the ANSI C12.x accuracy
classes required for electricity (e.g., 1%, 2%, and 0.5% accuracy
classes). Indeed, entPhySensorPrecision [RFC3433] represents "The
number of decimal places of precision in fixed-point sensor values
returned by the associated entPhySensorValue object". The ANSI and
IEC standards are used for power measurement and these standards
require that we use an accuracy class, not the scientific-number
precision model specified in RFC3433. The eoPowerAccuracy MIB object
models this accuracy. Note that eoPowerUnitMultipler represents the
scale factor per IEC 62053-21 [IEC.62053-21] and IEC 62053-22
[IEC.62053-22], which is a more logical representation for power
measurements (compared to entPhySensorScale), with the mantissa and
the exponent values X * 10 ^ Y.
Power measurements specifying the qualifier 'UNITS' for each measured
value in watts are used in the LLDP-EXT-MED-MIB, Power Ethernet
[RFC3621], and UPS [RFC1628] MIBs. The same 'UNITS' qualifier is
used for the power measurement values.
One cannot assume that the ENTITY-MIB and ENTITY-SENSOR MIBs are
implemented for all Energy Objects that need to be monitored. A
typical example is a converged building gateway, which can monitor
other devices in a building and provides a proxy between SNMP and a
protocol like BACnet. Another example is the home energy controller.
In such cases, the eoPhysicalEntity value contains the zero value,
using the PhysicalIndexOrZero Textual Convention.
The eoPower is similar to entPhySensorValue [RFC3433] and the
eoPowerUnitMultipler is similar to entPhySensorScale.
7.2. Link with the ENTITY-STATE MIB
For each entity in the ENTITY-MIB [RFC6933], the ENTITY-STATE MIB
[RFC4268] specifies the operational states (entStateOper: unknown,
enabled, disabled, testing), the alarm (entStateAlarm: unknown,
underRepair, critical, major, minor, warning, indeterminate), and the
possible values of standby states (entStateStandby: unknown,
hotStandby, coldStandby, providingService).
Chandramouli, et al. Standards Track [Page 20]
RFC 7460 Power/Energy Monitoring and Control MIB March 2015
From a power-monitoring point of view, in contrast to the entity
operational states of entities, Power States are required, as
proposed in the Monitoring and Control MIB for Power and Energy.
Those Power States can be mapped to the different operational states
in the ENTITY-STATE MIB, if a formal mapping is required. For
example, the entStateStandby "unknown", "hotStandby", and
"coldStandby" states could map to the Power State "unknown", "ready",
"standby", respectively, while the entStateStandby "providingService"
could map to any "low" to "high" Power State.
7.3. Link with the POWER-OVER-ETHERNET MIB
The Power-over-Ethernet MIB [RFC3621] provides an energy monitoring
and configuration framework for power over Ethernet devices. RFC
3621 defines a port group entity on a switch for power monitoring and
management policy and does not use the entPhysicalIndex index.
Indeed, pethMainPseConsumptionPower is indexed by the
pethMainPseGroupIndex, which has no mapping with the
entPhysicalIndex.
If the Power-over-Ethernet MIB [RFC3621] is supported, the Energy
Object eoethPortIndex and eoethPortGrpIndex contain the
pethPsePortIndex and pethPsePortGroupIndex, respectively. However,
one cannot assume that the Power-over-Ethernet MIB is implemented for
most or all Energy Objects. In such cases, the eoethPortIndex and
eoethPortGrpIndex values contain the zero value, via the new
PethPsePortIndexOrZero and PethPsePortGroupIndexOrZero TCs.
In either case, the entPhysicalIndex MIB object is used as the unique
Energy Object index.
Note that, even though the Power-over-Ethernet MIB [RFC3621] was
created after the ENTITY-SENSOR MIB [RFC3433], it does not reuse the
precision notion from the ENTITY-SENSOR MIB, i.e., the
entPhySensorPrecision MIB object.
7.4. Link with the UPS MIB
To protect against unexpected power disruption, data centers and
buildings make use of Uninterruptible Power Supplies (UPS). To
protect critical assets, a UPS can be restricted to a particular
subset or domain of the network. UPS usage typically lasts only for
a finite period of time, until normal power supply is restored.
Planning is required to decide on the capacity of the UPS based on
output power and duration of probable power outage. To properly
provision UPS power in a data center or building, it is important to
Chandramouli, et al. Standards Track [Page 21]
RFC 7460 Power/Energy Monitoring and Control MIB March 2015
first understand the total demand required to support all the
entities in the site. This demand can be assessed and monitored via
the Monitoring and Control MIB for Power and Energy.
The UPS MIB [RFC1628] provides information on the state of the UPS
network. Implementation of the UPS MIB is useful at the aggregate
level of a data center or a building. The MIB module contains
several groups of variables:
- upsIdent: Identifies the UPS entity (name, model, etc.).
- upsBattery group: Indicates the battery state (upsbatteryStatus,
upsEstimatedMinutesRemaining, etc.)
- upsInput group: Characterizes the input load to the UPS (number
of input lines, voltage, current, etc.).
- upsOutput: Characterizes the output from the UPS (number of
output lines, voltage, current, etc.)
- upsAlarms: Indicates the various alarm events.
The measurement of power in the UPS MIB is in volts, amperes, and
watts. The units of power measurement are root mean square (RMS)
volts and RMS amperes. They are not based on the
EntitySensorDataScale and EntitySensorDataPrecision of ENTITY-SENSOR-
MIB.
Both the Monitoring and Control MIB for Power and Energy and the UPS
MIB may be implemented on the same UPS SNMP agent, without conflict.
In this case, the UPS device itself is the Energy Object and any of
the UPS meters or submeters are the Energy Objects with a possible
relationship as defined in [RFC7326].
7.5. Link with the LLDP and LLDP-MED MIBs
The Link Layer Discovery Protocol (LLDP) is a Data Link Layer
protocol used by network devices to advertise their identities,
capabilities, and interconnections on a LAN network.
The Media Endpoint Discovery is an enhancement of LLDP, known as
LLDP-MED. The LLDP-MED enhancements specifically address voice
applications. LLDP-MED covers six basic areas: capability discovery,
LAN speed and duplex discovery, network policy discovery, location
identification discovery, inventory discovery, and power discovery.
Chandramouli, et al. Standards Track [Page 22]RFC 7460 Power/Energy Monitoring and Control MIB March 2015
Of particular interest to the current MIB module is the power
discovery, which allows the endpoint device (such as a PoE phone) to
convey power requirements to the switch. In power discovery,
LLDP-MED has four Type-Length-Values (TLVs): power type, power
source, power priority, and power value. Respectively, those TLVs
provide information related to the type of power (power sourcing
entity versus powered device), how the device is powered (from the
line, from a backup source, from external power source, etc.), the
power priority (how important is it that this device has power?), and
how much power the device needs.
The power priority specified in the LLDP-MED MIB [LLDP-MED-MIB]
actually comes from the Power-over-Ethernet MIB [RFC3621]. If the
Power-over-Ethernet MIB [RFC3621] is supported, the exact value from
the pethPsePortPowerPriority [RFC3621] is copied over into the
lldpXMedRemXPoEPDPowerPriority [LLDP-MED-MIB]; otherwise, the value
in lldpXMedRemXPoEPDPowerPriority is "unknown". From the Monitoring
and Control MIB for Power and Energy, it is possible to identify the
pethPsePortPowerPriority [RFC3621], via the eoethPortIndex and
eoethPortGrpIndex.
The lldpXMedLocXPoEPDPowerSource [LLDP-MED-MIB] is similar to
eoPowerMeasurementLocal in indicating if the power for an attached
device is local or from a remote device. If the LLDP-MED MIB is
supported, the following mapping can be applied to the
eoPowerMeasurementLocal: lldpXMedLocXPoEPDPowerSource fromPSE(2) and
local(3) can be mapped to false and true, respectively.
8. Structure of the MIB
The primary MIB object in the energyObjectMib MIB module is the
energyObjectMibObjects root. The eoPowerTable table of
energyObjectMibObjects describes the power measurement attributes of
an Energy Object entity. The identity of a device in terms of
uniquely identification of the Energy Object and its relationship to
other entities in the network are addressed in [RFC7461].
Logically, this MIB module is a sparse extension of the ENERGY-
OBJECT-CONTEXT-MIB module [RFC7461]. Thus, the following
requirements that are applied to [RFC7461] are also applicable. As a
requirement for this MIB module, [RFC7461] SHOULD be implemented and
as Module Compliance of ENTITY-MIB V4 [RFC6933] with respect to
entity4CRCompliance MUST be supported, which requires four MIB
objects: entPhysicalIndex, entPhysicalClass, entPhysicalName, and
entPhysicalUUID MUST be implemented.
Chandramouli, et al. Standards Track [Page 23]
RFC 7460 Power/Energy Monitoring and Control MIB March 2015
The eoMeterCapabilitiesTable is useful to enable applications to
determine the capabilities supported by the local management agent.
This table indicates the energy-monitoring MIB groups that are
supported by the local management system. By reading the value of
this object, it is possible for applications to know which tables
contain the information and are usable without walking through the
table and querying every element that involves a trial-and-error
process.
The power measurement of an Energy Object contains information
describing its power usage (eoPower) and its current Power State
(eoPowerOperState). In addition to power usage, additional
information describing the units of measurement (eoPowerAccuracy,
eoPowerUnitMultiplier), how power usage measurement was obtained
(eoPowerMeasurementCaliber), the source of power measurement
(eoPowerMeasurementLocal), and the type of power (eoPowerCurrentType)
are described.
An Energy Object may contain an optional eoEnergyTable to describe
energy measurement information over time.
An Energy Object may contain an optional eoACPwrAttributesTable table
(specified in the POWER-ATTRIBUTES-MIB module) that describes the
electrical characteristics associated with the current Power State
and usage.
An Energy Object may also contain optional battery information
associated with this entity.
9. MIB Definitions
9.1. The IANAPowerStateSet-MIB Module
-- ************************************************************
--
--
-- This MIB, maintained by IANA, contains a single Textual
-- Convention: PowerStateSet
--
-- ************************************************************
IANAPowerStateSet-MIB DEFINITIONS ::= BEGIN
IMPORTS
MODULE-IDENTITY, mib-2 FROM SNMPv2-SMI
TEXTUAL-CONVENTION FROM SNMPv2-TC;
ianaPowerStateSet MODULE-IDENTITY
Chandramouli, et al. Standards Track [Page 24]RFC 7460 Power/Energy Monitoring and Control MIB March 2015
LAST-UPDATED "201502090000Z" -- 9 February 2015
ORGANIZATION "IANA"
CONTACT-INFO "
Internet Assigned Numbers Authority
Postal: ICANN
12025 Waterfront Drive, Suite 300
Los Angeles, CA 90094
United States
Tel: +1-310-301 5800
EMail: iana@iana.org"
DESCRIPTION
"Copyright (c) 2015 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 Simplified BSD License
set forth in Section 4.c of the IETF Trust's Legal Provisions
Relating to IETF Documents
(http://trustee.ietf.org/license-info).
This MIB module defines the PowerStateSet Textual
Convention, which specifies the Power State Sets and
Power State Set Values an Energy Object supports.
The initial version of this MIB module was published in
RFC 7460; for full legal notices see the RFC itself."
-- revision history
REVISION "201502090000Z" -- 9 February 2015
DESCRIPTION
"Initial version of this MIB module, as published as RFC
7460."
::= { mib-2 228 }
PowerStateSet ::= TEXTUAL-CONVENTION
STATUS current
DESCRIPTION
"IANAPowerState is a textual convention that describes
Power State Sets and Power State Set Values an Energy
Object supports. IANA has created a registry of Power
State supported by an Energy Object and IANA shall
administer the list of Power State Sets and Power
States.
Chandramouli, et al. Standards Track [Page 25]RFC 7460 Power/Energy Monitoring and Control MIB March 2015
The Textual Convention assumes that Power States in a
Power State Set are limited to 255 distinct values. For
a Power State Set S, the named number with the value S *
256 is allocated to indicate the Power State Set. For a
Power State X in the Power State Set S, the named number
with the value S * 256 + X + 1 is allocated to represent
the Power State.
Requests for new values should be made to IANA via email
(iana@iana.org)."
REFERENCE
"http://www.iana.org/assignments/power-state-sets"
SYNTAX INTEGER {
other(0), -- indicates other set
unknown(255), -- unknown
ieee1621(256), -- indicates IEEE1621 set
ieee1621Off(257),
ieee1621Sleep(258),
ieee1621On(259),
dmtf(512), -- indicates DMTF set
dmtfOn(513),
dmtfSleepLight(514),
dmtfSleepDeep(515),
dmtfOffHard(516),
dmtfOffSoft(517),
dmtfHibernate(518),
dmtfPowerOffSoft(519),
dmtfPowerOffHard(520),
dmtfMasterBusReset(521),
dmtfDiagnosticInterrapt(522),
dmtfOffSoftGraceful(523),
dmtfOffHardGraceful(524),
dmtfMasterBusResetGraceful(525),
dmtfPowerCycleOffSoftGraceful(526),
dmtfPowerCycleHardGraceful(527),
eman(1024), -- indicates EMAN set
emanMechOff(1025),
emanSoftOff(1026),
emanHibernate(1027),
emanSleep(1028),
emanStandby(1029),
emanReady(1030),
emanLowMinus(1031),
emanLow(1032),
Chandramouli, et al. Standards Track [Page 26]RFC 7460 Power/Energy Monitoring and Control MIB March 2015
emanMediumMinus(1033),
emanMedium(1034),
emanHighMinus(1035),
emanHigh(1036)
}
END
9.2. The ENERGY-OBJECT-MIB MIB Module
-- ************************************************************
--
--
-- This MIB is used to monitor power usage of network
-- devices
--
-- *************************************************************
ENERGY-OBJECT-MIB DEFINITIONS ::= BEGIN
IMPORTS
MODULE-IDENTITY,
OBJECT-TYPE,
NOTIFICATION-TYPE,
mib-2,
Integer32, Counter32, Unsigned32, TimeTicks
FROM SNMPv2-SMI
TEXTUAL-CONVENTION, RowStatus, TimeInterval,
TimeStamp, TruthValue, StorageType
FROM SNMPv2-TC
MODULE-COMPLIANCE, NOTIFICATION-GROUP, OBJECT-GROUP
FROM SNMPv2-CONF
OwnerString
FROM RMON-MIB
entPhysicalIndex
FROM ENTITY-MIB
PowerStateSet
FROM IANAPowerStateSet-MIB;
energyObjectMib MODULE-IDENTITY
LAST-UPDATED "201502090000Z" -- 9 February 2015
ORGANIZATION "IETF EMAN Working Group"
CONTACT-INFO
"WG charter:
http://datatracker.ietf.org/wg/eman/charter/
Mailing Lists:
General Discussion: eman@ietf.org
Chandramouli, et al. Standards Track [Page 27]RFC 7460 Power/Energy Monitoring and Control MIB March 2015
To Subscribe:
https://www.ietf.org/mailman/listinfo/eman
Archive:
http://www.ietf.org/mail-archive/web/eman
Editors:
Mouli Chandramouli
Cisco Systems, Inc.
Sarjapur Outer Ring Road
Bangalore 560103
India
Phone: +91 80 4429 2409
Email: moulchan@cisco.com
Brad Schoening
44 Rivers Edge Drive
Little Silver, NJ 07739
United States
Email: brad.schoening@verizon.net
Juergen Quittek
NEC Europe, Ltd.
NEC Laboratories Europe
Network Research Division
Kurfuersten-Anlage 36
Heidelberg 69115
Germany
Phone: +49 6221 4342-115
Email: quittek@neclab.eu
Thomas Dietz
NEC Europe, Ltd.
NEC Laboratories Europe
Network Research Division
Kurfuersten-Anlage 36
69115 Heidelberg
Germany
Phone: +49 6221 4342-128
Email: Thomas.Dietz@nw.neclab.eu
Benoit Claise
Cisco Systems, Inc.
De Kleetlaan 6a b1
Degem 1831
Belgium
Phone: +32 2 704 5622
Email: bclaise@cisco.com"
Chandramouli, et al. Standards Track [Page 28]RFC 7460 Power/Energy Monitoring and Control MIB March 2015
DESCRIPTION
"Copyright (c) 2015 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 Simplified BSD License
set forth in Section 4.c of the IETF Trust's Legal Provisions
Relating to IETF Documents
(http://trustee.ietf.org/license-info).
This MIB is used to monitor power and energy in
devices.
The tables eoMeterCapabilitiesTable and eoPowerTable
are a sparse extension of the eoTable from the
ENERGY-OBJECT-CONTEXT-MIB. As a requirement,
[RFC7461] SHOULD be implemented.
Module Compliance of ENTITY-MIB v4 with respect to
entity4CRCompliance MUST be supported which requires
implementation of 4 MIB objects: entPhysicalIndex,
entPhysicalClass, entPhysicalName and entPhysicalUUID."
REVISION "201502090000Z" -- 9 February 2015
DESCRIPTION
"Initial version, published as RFC 7460."
::= { mib-2 229 }
energyObjectMibNotifs OBJECT IDENTIFIER
::= { energyObjectMib 0 }
energyObjectMibObjects OBJECT IDENTIFIER
::= { energyObjectMib 1 }
energyObjectMibConform OBJECT IDENTIFIER
::= { energyObjectMib 2 }
-- Textual Conventions
UnitMultiplier ::= TEXTUAL-CONVENTION
STATUS current
DESCRIPTION
"The Unit Multiplier is an integer value that represents
the IEEE 61850 Annex A units multiplier associated with
the integer units used to measure the power or energy.
Chandramouli, et al. Standards Track [Page 29]RFC 7460 Power/Energy Monitoring and Control MIB March 2015
For example, when used with eoPowerUnitMultiplier, -3
represents 10^-3 or milliwatts."
REFERENCE
"The International System of Units (SI), National
Institute of Standards and Technology, Spec. Publ. 330,
August 1991."
SYNTAX INTEGER {
yocto(-24), -- 10^-24
zepto(-21), -- 10^-21
atto(-18), -- 10^-18
femto(-15), -- 10^-15
pico(-12), -- 10^-12
nano(-9), -- 10^-9
micro(-6), -- 10^-6
milli(-3), -- 10^-3
units(0), -- 10^0
kilo(3), -- 10^3
mega(6), -- 10^6
giga(9), -- 10^9
tera(12), -- 10^12
peta(15), -- 10^15
exa(18), -- 10^18
zetta(21), -- 10^21
yotta(24) -- 10^24
}
-- Objects
eoMeterCapabilitiesTable OBJECT-TYPE
SYNTAX SEQUENCE OF EoMeterCapabilitiesEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This table is useful for helping applications determine
the monitoring capabilities supported by the local
management agents. It is possible for applications to
know which tables are usable without going through a
trial-and-error process."
::= { energyObjectMibObjects 1 }
eoMeterCapabilitiesEntry OBJECT-TYPE
SYNTAX EoMeterCapabilitiesEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry describes the metering capability of an Energy
Object."
INDEX { entPhysicalIndex }
Chandramouli, et al. Standards Track [Page 30]RFC 7460 Power/Energy Monitoring and Control MIB March 2015
::= { eoMeterCapabilitiesTable 1 }
EoMeterCapabilitiesEntry ::= SEQUENCE {
eoMeterCapability BITS
}
eoMeterCapability OBJECT-TYPE
SYNTAX BITS {
none(0),
powermetering(1), -- power measurement
energymetering(2), -- energy measurement
powerattributes(3) -- power attributes
}
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"An indication of the energy-monitoring capabilities
supported by this agent. This object use a BITS syntax
and indicates the MIB groups supported by the probe. By
reading the value of this object, it is possible to
determine the MIB tables supported."
::= { eoMeterCapabilitiesEntry 1 }
eoPowerTable OBJECT-TYPE
SYNTAX SEQUENCE OF EoPowerEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This table lists Energy Objects."
::= { energyObjectMibObjects 2 }
eoPowerEntry OBJECT-TYPE
SYNTAX EoPowerEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry describes the power usage of an Energy Object."
INDEX { entPhysicalIndex }
::= { eoPowerTable 1 }
EoPowerEntry ::= SEQUENCE {
eoPower Integer32,
eoPowerNameplate Unsigned32,
eoPowerUnitMultiplier UnitMultiplier,
eoPowerAccuracy Integer32,
eoPowerMeasurementCaliber INTEGER,
eoPowerCurrentType INTEGER,
eoPowerMeasurementLocal TruthValue,
Chandramouli, et al. Standards Track [Page 31]RFC 7460 Power/Energy Monitoring and Control MIB March 2015
eoPowerAdminState PowerStateSet,
eoPowerOperState PowerStateSet,
eoPowerStateEnterReason OwnerString
}
eoPower OBJECT-TYPE
SYNTAX Integer32
UNITS "watts"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object indicates the power measured for the Energy
Object. For alternating current, this value is obtained
as an average over fixed number of AC cycles. This value
is specified in SI units of watts with the magnitude of
watts (milliwatts, kilowatts, etc.) indicated separately
in eoPowerUnitMultiplier. The accuracy of the measurement
is specified in eoPowerAccuracy. The direction of power
flow is indicated by the sign on eoPower. If the Energy
Object is consuming power, the eoPower value will be
positive. If the Energy Object is producing power, the
eoPower value will be negative.
The eoPower MUST be less than or equal to the maximum
power that can be consumed at the Power State specified
by eoPowerState.
The eoPowerMeasurementCaliber object specifies how the
usage value reported by eoPower was obtained. The eoPower
value must report 0 if the eoPowerMeasurementCaliber is
'unavailable'. For devices that cannot measure or
report power, this option can be used."
::= { eoPowerEntry 1 }
eoPowerNameplate OBJECT-TYPE
SYNTAX Unsigned32
UNITS "watts"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object indicates the rated maximum consumption for
the fully populated Energy Object. The nameplate power
requirements are the maximum power numbers given in SI
watts and, in almost all cases, are well above the
expected operational consumption. Nameplate power is
widely used for power provisioning. This value is
specified in either units of watts or voltage and
current. The units are therefore SI watts or equivalent
Chandramouli, et al. Standards Track [Page 32]RFC 7460 Power/Energy Monitoring and Control MIB March 2015
Volt-Amperes with the magnitude (milliwatts, kilowatts,
etc.) indicated separately in eoPowerUnitMultiplier."
::= { eoPowerEntry 2 }
eoPowerUnitMultiplier OBJECT-TYPE
SYNTAX UnitMultiplier
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The magnitude of watts for the usage value in eoPower
and eoPowerNameplate."
::= { eoPowerEntry 3 }
eoPowerAccuracy OBJECT-TYPE
SYNTAX Integer32 (0..10000)
UNITS "hundredths of percent"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object indicates a percentage value, in hundredths of a
percent, representing the assumed accuracy of the usage
reported by eoPower. For example, the value 1010 means
the reported usage is accurate to +/- 10.1 percent. This
value is zero if the accuracy is unknown or not
applicable based upon the measurement method.
ANSI and IEC define the following accuracy classes for
power measurement:
IEC 62053-22 60044-1 class 0.1, 0.2, 0.5, 1 3.
ANSI C12.20 class 0.2, 0.5"
::= { eoPowerEntry 4 }
eoPowerMeasurementCaliber OBJECT-TYPE
SYNTAX INTEGER {
unavailable(1) ,
unknown(2),
actual(3) ,
estimated(4),
static(5) }
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object specifies how the usage value reported by
eoPower was obtained:
- unavailable(1): Indicates that the usage is not
available. In such a case, the eoPower value must be 0
for devices that cannot measure or report power this
Chandramouli, et al. Standards Track [Page 33]RFC 7460 Power/Energy Monitoring and Control MIB March 2015
option can be used.
- unknown(2): Indicates that the way the usage was
determined is unknown. In some cases, entities report
aggregate power on behalf of another device. In such
cases it is not known whether the usage reported is
actual, estimated, or static.
- actual(3): Indicates that the reported usage was
measured by the entity through some hardware or direct
physical means. The usage data reported is not estimated
or static but is the measured consumption rate.
- estimated(4): Indicates that the usage was not
determined by physical measurement. The value is a
derivation based upon the device type, state, and/or
current utilization using some algorithm or heuristic. It
is presumed that the entity's state and current
configuration were used to compute the value.
- static(5): Indicates that the usage was not determined
by physical measurement, algorithm, or derivation. The
usage was reported based upon external tables,
specifications, and/or model information. For example, a
PC Model X draws 200W, while a PC Model Y draws 210W."
::= { eoPowerEntry 5 }
eoPowerCurrentType OBJECT-TYPE
SYNTAX INTEGER {
ac(1),
dc(2),
unknown(3)
}
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object indicates whether the eoPower for the
Energy Object reports alternating current 'ac', direct
current 'dc', or that the current type is unknown."
::= { eoPowerEntry 6 }
eoPowerMeasurementLocal OBJECT-TYPE
SYNTAX TruthValue
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object indicates the source of power measurement
and can be useful when modeling the power usage of
Chandramouli, et al. Standards Track [Page 34]RFC 7460 Power/Energy Monitoring and Control MIB March 2015
attached devices. The power measurement can be performed
by the entity itself or the power measurement of the
entity can be reported by another trusted entity using a
protocol extension. A value of true indicates the
measurement is performed by the entity, whereas false
indicates that the measurement was performed by another
entity."
::= { eoPowerEntry 7 }
eoPowerAdminState OBJECT-TYPE
SYNTAX PowerStateSet
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"This object specifies the desired Power State and the
Power State Set for the Energy Object. Note that other(0)
is not a Power State Set and unknown(255) is not a Power
State as such, but simply an indication that the Power
State of the Energy Object is unknown.
Possible values of eoPowerAdminState within the Power
State Set are registered at IANA.
A current list of assignments can be found at
<http://www.iana.org/assignments/power-state-sets>"
::= { eoPowerEntry 8 }
eoPowerOperState OBJECT-TYPE
SYNTAX PowerStateSet
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object specifies the current operational Power
State and the Power State Set for the Energy Object.
other(0) is not a Power State Set and unknown(255) is not
a Power State as such, but simply an indication that the
Power State of the Energy Object is unknown.
Possible values of eoPowerOperState within the Power
State Set are registered at IANA. A current list of
assignments can be found at
<http://www.iana.org/assignments/power-state-sets>"
::= { eoPowerEntry 9 }
eoPowerStateEnterReason OBJECT-TYPE
SYNTAX OwnerString
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"This string object describes the reason for the
Chandramouli, et al. Standards Track [Page 35]RFC 7460 Power/Energy Monitoring and Control MIB March 2015
eoPowerAdminState transition. Alternatively, this string
may contain with the entity that configured this Energy
Object to this Power State."
DEFVAL { "" }
::= { eoPowerEntry 10 }
eoPowerStateTable OBJECT-TYPE
SYNTAX SEQUENCE OF EoPowerStateEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This table enumerates the maximum power usage, in watts,
for every single supported Power State of each Energy
Object.
This table has cross-reference with the eoPowerTable,
containing rows describing each Power State for the
corresponding Energy Object. For every Energy Object in
the eoPowerTable, there is a corresponding entry in this
table."
::= { energyObjectMibObjects 3 }
eoPowerStateEntry OBJECT-TYPE
SYNTAX EoPowerStateEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A eoPowerStateEntry extends a corresponding
eoPowerEntry. This entry displays max usage values at
every single possible Power State supported by the Energy
Object.
For example, given the values of a Energy Object
corresponding to a maximum usage of 0 W at the
state emanmechoff, 8 W at state 6 (ready), 11 W at state
emanmediumMinus, and 11 W at state emanhigh:
State MaxUsage Units
emanmechoff 0 W
emansoftoff 0 W
emanhibernate 0 W
emansleep 0 W
emanstandby 0 W
emanready 8 W
emanlowMinus 8 W
emanlow 11 W
emanmediumMinus 11 W
emanmedium 11 W
emanhighMinus 11 W
Chandramouli, et al. Standards Track [Page 36]RFC 7460 Power/Energy Monitoring and Control MIB March 2015
emnanhigh 11 W
Furthermore, this table also includes the total time in
each Power State, along with the number of times a
particular Power State was entered."
INDEX { entPhysicalIndex, eoPowerStateIndex }
::= { eoPowerStateTable 1 }
EoPowerStateEntry ::= SEQUENCE {
eoPowerStateIndex PowerStateSet,
eoPowerStateMaxPower Integer32,
eoPowerStatePowerUnitMultiplier UnitMultiplier,
eoPowerStateTotalTime TimeTicks,
eoPowerStateEnterCount Counter32
}
eoPowerStateIndex OBJECT-TYPE
SYNTAX PowerStateSet
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This object specifies the index of the Power State of
the Energy Object within a Power State Set. The semantics
of the specific Power State can be obtained from the
Power State Set definition."
::= { eoPowerStateEntry 1 }
eoPowerStateMaxPower OBJECT-TYPE
SYNTAX Integer32
UNITS "watts"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object indicates the maximum power for the Energy
Object at the particular Power State. This value is
specified in SI units of watts with the magnitude of the
units (milliwatts, kilowatts, etc.) indicated separately
in eoPowerStatePowerUnitMultiplier. If the maximum power
is not known for a certain Power State, then the value is
encoded as 0xFFFFFFFF.
For Power States not enumerated, the value of
eoPowerStateMaxPower might be interpolated by using the
next highest supported Power State."
::= { eoPowerStateEntry 2 }
Chandramouli, et al. Standards Track [Page 37]RFC 7460 Power/Energy Monitoring and Control MIB March 2015
eoPowerStatePowerUnitMultiplier OBJECT-TYPE
SYNTAX UnitMultiplier
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The magnitude of watts for the usage value in
eoPowerStateMaxPower."
::= { eoPowerStateEntry 3 }
eoPowerStateTotalTime OBJECT-TYPE
SYNTAX TimeTicks
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object indicates the total time in hundredths
of a second that the Energy Object has been in this power
state since the last reset, as specified in the
sysUpTime."
::= { eoPowerStateEntry 4 }
eoPowerStateEnterCount OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object indicates how often the Energy Object has
entered this power state, since the last reset of the
device as specified in the sysUpTime."
::= { eoPowerStateEntry 5 }
eoEnergyParametersTable OBJECT-TYPE
SYNTAX SEQUENCE OF EoEnergyParametersEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This table is used to configure the parameters for
energy measurement collection in the table eoEnergyTable.
This table allows the configuration of different
measurement settings on the same Energy Object.
Implementation of this table only makes sense for Energy
Objects that an eoPowerMeasurementCaliber of actual."
::= { energyObjectMibObjects 4 }
eoEnergyParametersEntry OBJECT-TYPE
SYNTAX EoEnergyParametersEntry
MAX-ACCESS not-accessible
STATUS current
Chandramouli, et al. Standards Track [Page 38]RFC 7460 Power/Energy Monitoring and Control MIB March 2015
DESCRIPTION
"An entry controls an energy measurement in
eoEnergyTable."
INDEX { entPhysicalIndex, eoEnergyParametersIndex }
::= { eoEnergyParametersTable 1 }
EoEnergyParametersEntry ::= SEQUENCE {
eoEnergyParametersIndex Integer32,
eoEnergyParametersIntervalLength TimeInterval,
eoEnergyParametersIntervalNumber Unsigned32,
eoEnergyParametersIntervalMode INTEGER,
eoEnergyParametersIntervalWindow TimeInterval,
eoEnergyParametersSampleRate Unsigned32,
eoEnergyParametersStorageType StorageType,
eoEnergyParametersStatus RowStatus
}
eoEnergyParametersIndex OBJECT-TYPE
SYNTAX Integer32 (1..2147483647)
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This object specifies the index of the Energy Parameters
setting for collection of energy measurements for an
Energy Object. An Energy Object can have multiple
eoEnergyParametersIndex, depending on the capabilities of
the Energy Object"
::= { eoEnergyParametersEntry 2 }
eoEnergyParametersIntervalLength OBJECT-TYPE
SYNTAX TimeInterval
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This object indicates the length of time in hundredths
of a second over which to compute the average
eoEnergyConsumed measurement in the eoEnergyTable table.
The computation is based on the Energy Object's internal
sampling rate of power consumed or produced by the Energy
Object. The sampling rate is the rate at which the Energy
Object can read the power usage and may differ based on
device capabilities. The average energy consumption is
then computed over the length of the interval. The
default value of 15 minutes is a common interval used in
industry."
DEFVAL { 90000 }
::= { eoEnergyParametersEntry 3 }
Chandramouli, et al. Standards Track [Page 39]RFC 7460 Power/Energy Monitoring and Control MIB March 2015
eoEnergyParametersIntervalNumber OBJECT-TYPE
SYNTAX Unsigned32
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The number of intervals maintained in the eoEnergyTable.
Each interval is characterized by a specific
eoEnergyCollectionStartTime, used as an index to the
table eoEnergyTable. Whenever the maximum number of
entries is reached, the measurement over the new interval
replaces the oldest measurement. There is one exception
to this rule: when the eoEnergyMaxConsumed and/or
eoEnergyMaxProduced are in (one of) the two oldest
measurement(s), they are left untouched and the next
oldest measurement is replaced."
DEFVAL { 10 }
::= { eoEnergyParametersEntry 4 }
eoEnergyParametersIntervalMode OBJECT-TYPE
SYNTAX INTEGER {
period(1),
sliding(2),
total(3)
}
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"A control object to define the mode of interval
calculation for the computation of the average
eoEnergyConsumed or eoEnergyProvided measurement in the
eoEnergyTable table.
A mode of period(1) specifies non-overlapping periodic
measurements.
A mode of sliding(2) specifies overlapping sliding
windows where the interval between the start of one
interval and the next is defined in
eoEnergyParametersIntervalWindow.
A mode of total(3) specifies non-periodic measurement.
In this mode only one interval is used as this is a
continuous measurement since the last reset. The value of
eoEnergyParametersIntervalNumber should be (1) one and
eoEnergyParametersIntervalLength is ignored."
::= { eoEnergyParametersEntry 5 }
Chandramouli, et al. Standards Track [Page 40]RFC 7460 Power/Energy Monitoring and Control MIB March 2015
eoEnergyParametersIntervalWindow OBJECT-TYPE
SYNTAX TimeInterval
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The length of the duration window between the starting
time of one sliding window and the next starting time in
hundredths of seconds, used to compute the average of
eoEnergyConsumed, eoEnergyProvided measurements in the
eoEnergyTable table. This is valid only when the
eoEnergyParametersIntervalMode is sliding(2). The
eoEnergyParametersIntervalWindow value should be a
multiple of eoEnergyParametersSampleRate."
::= { eoEnergyParametersEntry 6 }
eoEnergyParametersSampleRate OBJECT-TYPE
SYNTAX Unsigned32
UNITS "Milliseconds"
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The sampling rate, in milliseconds, at which the Energy
Object should poll power usage in order to compute the
average eoEnergyConsumed, eoEnergyProvided measurements
in the table eoEnergyTable. The Energy Object should
initially set this sampling rate to a reasonable value,
i.e., a compromise between intervals that will provide
good accuracy by not being too long, but not so short
that they affect the Energy Object performance by
requesting continuous polling. If the sampling rate is
unknown, the value 0 is reported. The sampling rate
should be selected so that
eoEnergyParametersIntervalWindow is a multiple of
eoEnergyParametersSampleRate. The default value is one
second."
DEFVAL { 1000 }
::= { eoEnergyParametersEntry 7 }
eoEnergyParametersStorageType OBJECT-TYPE
SYNTAX StorageType
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This variable indicates the storage type for this row."
DEFVAL { nonVolatile }
::= {eoEnergyParametersEntry 8 }
Chandramouli, et al. Standards Track [Page 41]RFC 7460 Power/Energy Monitoring and Control MIB March 2015
eoEnergyParametersStatus OBJECT-TYPE
SYNTAX RowStatus
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The status of this row. The eoEnergyParametersStatus is
used to start or stop energy usage logging. An entry
status may not be active(1) unless all objects in the
entry have an appropriate value. If this object is not
equal to active, all associated usage-data logged into
the eoEnergyTable will be deleted. The data can be
destroyed by setting up the eoEnergyParametersStatus to
destroy."
::= {eoEnergyParametersEntry 9 }
eoEnergyTable OBJECT-TYPE
SYNTAX SEQUENCE OF EoEnergyEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This table lists Energy Object energy measurements.
Entries in this table are only created if the
corresponding value of object eoPowerMeasurementCaliber
is active(3), i.e., if the power is actually metered."
::= { energyObjectMibObjects 5 }
eoEnergyEntry OBJECT-TYPE
SYNTAX EoEnergyEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry describing energy measurements."
INDEX { eoEnergyParametersIndex,
eoEnergyCollectionStartTime }
::= { eoEnergyTable 1 }
EoEnergyEntry ::= SEQUENCE {
eoEnergyCollectionStartTime TimeTicks,
eoEnergyConsumed Unsigned32,
eoEnergyProvided Unsigned32,
eoEnergyStored Unsigned32,
eoEnergyUnitMultiplier UnitMultiplier,
eoEnergyAccuracy Integer32,
eoEnergyMaxConsumed Unsigned32,
eoEnergyMaxProduced Unsigned32,
eoEnergyDiscontinuityTime TimeStamp
}
Chandramouli, et al. Standards Track [Page 42]RFC 7460 Power/Energy Monitoring and Control MIB March 2015
eoEnergyCollectionStartTime OBJECT-TYPE
SYNTAX TimeTicks
UNITS "hundredths of a second"
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The time (in hundredths of a second) since the
network management portion of the system was last
re-initialized, as specified in the sysUpTime RFC 3418.
This object specifies the start time of the energy
measurement sample."
REFERENCE
"RFC 3418: Management Information Base (MIB) for the
Simple Network Management Protocol (SNMP)"
::= { eoEnergyEntry 1 }
eoEnergyConsumed OBJECT-TYPE
SYNTAX Unsigned32
UNITS "Watt-hours"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object indicates the energy consumed in units of
watt-hours for the Energy Object over the defined
interval. This value is specified in the common billing
units of watt-hours with the magnitude of watt-hours
kWh, MWh, etc.) indicated separately in
eoEnergyUnitMultiplier."
::= { eoEnergyEntry 2 }
eoEnergyProvided OBJECT-TYPE
SYNTAX Unsigned32
UNITS "Watt-hours"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object indicates the energy produced in units of
watt-hours for the Energy Object over the defined
interval.
This value is specified in the common billing units of
watt-hours with the magnitude of watt-hours (kWh, MWh,
etc.) indicated separately in
eoEnergyUnitMultiplier."
::= { eoEnergyEntry 3 }
Chandramouli, et al. Standards Track [Page 43]RFC 7460 Power/Energy Monitoring and Control MIB March 2015
eoEnergyStored OBJECT-TYPE
SYNTAX Unsigned32
UNITS "Watt-hours"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object indicates the difference of the energy
consumed and energy produced for an Energy Object in
units of watt-hours for the Energy Object over the
defined interval. This value is specified in the common
billing units of watt-hours with the magnitude of
watt-hours (kWh, MWh, etc.) indicated separately in
eoEnergyUnitMultiplier."
::= { eoEnergyEntry 4 }
eoEnergyUnitMultiplier OBJECT-TYPE
SYNTAX UnitMultiplier
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object is the magnitude of watt-hours for the
energy field in eoEnergyConsumed, eoEnergyProvided,
eoEnergyStored, eoEnergyMaxConsumed, and
eoEnergyMaxProduced."
::= { eoEnergyEntry 5 }
eoEnergyAccuracy OBJECT-TYPE
SYNTAX Integer32 (0..10000)
UNITS "hundredths of percent"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object indicates a percentage accuracy, in hundredths
of a percent, of Energy usage reporting. eoEnergyAccuracy
is applicable to all Energy measurements in the
eoEnergyTable.
For example, 1010 means the reported usage is accurate to
+/- 10.1 percent.
This value is zero if the accuracy is unknown."
::= { eoEnergyEntry 6 }
eoEnergyMaxConsumed OBJECT-TYPE
SYNTAX Unsigned32
UNITS "Watt-hours"
MAX-ACCESS read-only
STATUS current
Chandramouli, et al. Standards Track [Page 44]RFC 7460 Power/Energy Monitoring and Control MIB March 2015
DESCRIPTION
"This object is the maximum energy observed in
eoEnergyConsumed since the monitoring started or was
reinitialized. This value is specified in the common
billing units of watt-hours with the magnitude of
watt-hours (kWh, MWh, etc.) indicated separately in
eoEnergyUnitMultiplier."
::= { eoEnergyEntry 7 }
eoEnergyMaxProduced OBJECT-TYPE
SYNTAX Unsigned32
UNITS "Watt-hours"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object is the maximum energy ever observed in
eoEnergyEnergyProduced since the monitoring started. This
value is specified in the units of watt-hours with the
magnitude of watt-hours (kWh, MWh, etc.) indicated
separately in eoEnergyEnergyUnitMultiplier."
::= { eoEnergyEntry 8 }
eoEnergyDiscontinuityTime OBJECT-TYPE
SYNTAX TimeStamp
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of sysUpTime RFC 3418 on the most recent
occasion at which any one or more of this entity's energy
counters in this table suffered a discontinuity:
eoEnergyConsumed, eoEnergyProvided or eoEnergyStored. If
no such discontinuities have occurred since the last
re-initialization of the local management subsystem, then
this object contains a zero value."
REFERENCE
"RFC 3418: Management Information Base (MIB) for the
Simple Network Management Protocol (SNMP)"
::= { eoEnergyEntry 9 }
-- Notifications
eoPowerEnableStatusNotification
OBJECT-TYPE
SYNTAX TruthValue
MAX-ACCESS read-write
STATUS current
Chandramouli, et al. Standards Track [Page 45]RFC 7460 Power/Energy Monitoring and Control MIB March 2015
DESCRIPTION
"This object controls whether the system produces
notifications for eoPowerStateChange. A false value will
prevent these notifications from being generated."
DEFVAL { false }
::= { energyObjectMibNotifs 1 }
eoPowerStateChange NOTIFICATION-TYPE
OBJECTS {eoPowerAdminState, eoPowerOperState,
eoPowerStateEnterReason}
STATUS current
DESCRIPTION
"The SNMP entity generates the eoPowerStateChange when
the values of eoPowerAdminState or eoPowerOperState,
in the context of the Power State Set, have changed for
the Energy Object represented by the entPhysicalIndex."
::= { energyObjectMibNotifs 2 }
-- Conformance
energyObjectMibCompliances OBJECT IDENTIFIER
::= { energyObjectMibConform 1 }
energyObjectMibGroups OBJECT IDENTIFIER
::= { energyObjectMibConform 2 }
energyObjectMibFullCompliance MODULE-COMPLIANCE
STATUS current
DESCRIPTION
"When this MIB is implemented with support for
read-create, then such an implementation can
claim full compliance. Such devices can then
be both monitored and configured with this MIB.
Module Compliance of RFC 6933
with respect to entity4CRCompliance MUST
be supported, which requires implementation
of four MIB objects: entPhysicalIndex, entPhysicalClass,
entPhysicalName and entPhysicalUUID."
REFERENCE
"RFC 6933: Entity MIB (Version 4)"
MODULE -- this module
MANDATORY-GROUPS {
energyObjectMibTableGroup,
energyObjectMibStateTableGroup,
eoPowerEnableStatusNotificationGroup,
energyObjectMibNotifGroup
}
Chandramouli, et al. Standards Track [Page 46]RFC 7460 Power/Energy Monitoring and Control MIB March 2015
GROUP energyObjectMibEnergyTableGroup
DESCRIPTION
"A compliant implementation does not
have to implement."
GROUP energyObjectMibEnergyParametersTableGroup
DESCRIPTION
"A compliant implementation does not
have to implement."
GROUP energyObjectMibMeterCapabilitiesTableGroup
DESCRIPTION
"A compliant implementation does not
have to implement."
::= { energyObjectMibCompliances 1 }
energyObjectMibReadOnlyCompliance MODULE-COMPLIANCE
STATUS current
DESCRIPTION
"When this MIB is implemented without support for
read-create (i.e., in read-only mode), then such an
implementation can claim read-only compliance. Such a
device can then be monitored but cannot be
configured with this MIB.
Module Compliance of [RFC6933] with respect to
entity4CRCompliance MUST be supported which requires
implementation of 4 MIB objects: entPhysicalIndex,
entPhysicalClass, entPhysicalName and entPhysicalUUID."
REFERENCE
"RFC 6933: Entity MIB (Version 4)"
MODULE -- this module
MANDATORY-GROUPS {
energyObjectMibTableGroup,
energyObjectMibStateTableGroup,
energyObjectMibNotifGroup
}
::= { energyObjectMibCompliances 2 }
-- Units of Conformance
energyObjectMibTableGroup OBJECT-GROUP
OBJECTS {
eoPower,
eoPowerNameplate,
eoPowerUnitMultiplier,
eoPowerAccuracy,
Chandramouli, et al. Standards Track [Page 47]RFC 7460 Power/Energy Monitoring and Control MIB March 2015
eoPowerMeasurementCaliber,
eoPowerCurrentType,
eoPowerMeasurementLocal,
eoPowerAdminState,
eoPowerOperState,
eoPowerStateEnterReason
}
STATUS current
DESCRIPTION
"This group contains the collection of all the objects
related to the Energy Object."
::= { energyObjectMibGroups 1 }
energyObjectMibStateTableGroup OBJECT-GROUP
OBJECTS {
eoPowerStateMaxPower,
eoPowerStatePowerUnitMultiplier,
eoPowerStateTotalTime,
eoPowerStateEnterCount
}
STATUS current
DESCRIPTION
"This group contains the collection of all the objects
related to the Power State."
::= { energyObjectMibGroups 2 }
energyObjectMibEnergyParametersTableGroup OBJECT-GROUP
OBJECTS {
eoEnergyParametersIntervalLength,
eoEnergyParametersIntervalNumber,
eoEnergyParametersIntervalMode,
eoEnergyParametersIntervalWindow,
eoEnergyParametersSampleRate,
eoEnergyParametersStorageType,
eoEnergyParametersStatus
}
STATUS current
DESCRIPTION
"This group contains the collection of all the objects
related to the configuration of the Energy Table."
::= { energyObjectMibGroups 3 }
energyObjectMibEnergyTableGroup OBJECT-GROUP
OBJECTS {
-- Note that object
-- eoEnergyCollectionStartTime is not
-- included since it is not-accessible
Chandramouli, et al. Standards Track [Page 48]RFC 7460 Power/Energy Monitoring and Control MIB March 2015
eoEnergyConsumed,
eoEnergyProvided,
eoEnergyStored,
eoEnergyUnitMultiplier,
eoEnergyAccuracy,
eoEnergyMaxConsumed,
eoEnergyMaxProduced,
eoEnergyDiscontinuityTime
}
STATUS current
DESCRIPTION
"This group contains the collection of all the objects
related to the Energy Table."
::= { energyObjectMibGroups 4 }
energyObjectMibMeterCapabilitiesTableGroup OBJECT-GROUP
OBJECTS {
eoMeterCapability
}
STATUS current
DESCRIPTION
"This group contains the object indicating the capability
of the Energy Object"
::= { energyObjectMibGroups 5 }
eoPowerEnableStatusNotificationGroup OBJECT-GROUP
OBJECTS { eoPowerEnableStatusNotification }
STATUS current
DESCRIPTION
"The collection of objects that are used to enable
notification."
::= { energyObjectMibGroups 6 }
energyObjectMibNotifGroup NOTIFICATION-GROUP
NOTIFICATIONS {
eoPowerStateChange
}
STATUS current
DESCRIPTION
"This group contains the notifications for
the Monitoring and Control MIB for Power and Energy."
::= { energyObjectMibGroups 7 }
END
Chandramouli, et al. Standards Track [Page 49]RFC 7460 Power/Energy Monitoring and Control MIB March 2015
9.3. The POWER-ATTRIBUTES-MIB MIB Module
-- ************************************************************
--
-- This MIB module is used to monitor power attributes of
-- networked devices with measurements.
--
-- This MIB module is an extension of energyObjectMib module.
--
-- *************************************************************
POWER-ATTRIBUTES-MIB DEFINITIONS ::= BEGIN
IMPORTS
MODULE-IDENTITY,
OBJECT-TYPE,
mib-2,
Integer32, Unsigned32
FROM SNMPv2-SMI
MODULE-COMPLIANCE,
OBJECT-GROUP
FROM SNMPv2-CONF
UnitMultiplier
FROM ENERGY-OBJECT-MIB
entPhysicalIndex
FROM ENTITY-MIB;
powerAttributesMIB MODULE-IDENTITY
LAST-UPDATED "201502090000Z" -- 9 February 2015
ORGANIZATION "IETF EMAN Working Group"
CONTACT-INFO
"WG charter:
http://datatracker.ietf.org/wg/eman/charter/
Mailing Lists:
General Discussion: eman@ietf.org
To Subscribe:
https://www.ietf.org/mailman/listinfo/eman
Archive:
http://www.ietf.org/mail-archive/web/eman
Chandramouli, et al. Standards Track [Page 50]RFC 7460 Power/Energy Monitoring and Control MIB March 2015
Editors:
Mouli Chandramouli
Cisco Systems, Inc.
Sarjapur Outer Ring Road
Bangalore 560103
India
Phone: +91 80 4429 2409
Email: moulchan@cisco.com
Brad Schoening
44 Rivers Edge Drive
Little Silver, NJ 07739
United States
Email: brad.schoening@verizon.net
Juergen Quittek
NEC Europe Ltd.
NEC Laboratories Europe
Network Research Division
Kurfuersten-Anlage 36
Heidelberg 69115
Germany
Phone: +49 6221 4342-115
Email: quittek@neclab.eu
Thomas Dietz
NEC Europe Ltd.
NEC Laboratories Europe
Network Research Division
Kurfuersten-Anlage 36
69115 Heidelberg
Germany
Phone: +49 6221 4342-128
Email: Thomas.Dietz@nw.neclab.eu
Benoit Claise
Cisco Systems, Inc.
De Kleetlaan 6a b1
Degem 1831
Belgium
Phone: +32 2 704 5622
Email: bclaise@cisco.com"
Chandramouli, et al. Standards Track [Page 51]RFC 7460 Power/Energy Monitoring and Control MIB March 2015
DESCRIPTION
"Copyright (c) 2015 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 Simplified BSD License
set forth in Section 4.c of the IETF Trust's Legal Provisions
Relating to IETF Documents
(http://trustee.ietf.org/license-info).
This MIB is used to report AC power attributes in devices.
The table is a sparse augmentation of the eoPowerTable table
from the energyObjectMib module. Both three-phase and
single-phase power configurations are supported.
As a requirement for this MIB module, RFC 7461 SHOULD be
implemented.
Module Compliance of ENTITY-MIB v4 with respect to
entity4CRCompliance MUST be supported which requires
implementation of four MIB objects: entPhysicalIndex,
entPhysicalClass, entPhysicalName, and entPhysicalUUID."
REVISION "201502090000Z" -- 9 February 2015
DESCRIPTION
"Initial version, published as RFC 7460"
::= { mib-2 230 }
powerAttributesMIBConform OBJECT IDENTIFIER
::= { powerAttributesMIB 0 }
powerAttributesMIBObjects OBJECT IDENTIFIER
::= { powerAttributesMIB 1 }
-- Objects
eoACPwrAttributesTable OBJECT-TYPE
SYNTAX SEQUENCE OF EoACPwrAttributesEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This table contains power attributes measurements for
supported entPhysicalIndex entities. It is a sparse
extension of the eoPowerTable."
::= { powerAttributesMIBObjects 1 }
eoACPwrAttributesEntry OBJECT-TYPE
Chandramouli, et al. Standards Track [Page 52]RFC 7460 Power/Energy Monitoring and Control MIB March 2015
SYNTAX EoACPwrAttributesEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This is a sparse extension of the eoPowerTable with
entries for power attributes measurements or
configuration. Each measured value corresponds to an
attribute in IEC 61850-7-4 for non-phase measurements
within the object MMXN."
INDEX { entPhysicalIndex }
::= { eoACPwrAttributesTable 1 }
EoACPwrAttributesEntry ::= SEQUENCE {
eoACPwrAttributesConfiguration INTEGER,
eoACPwrAttributesAvgVoltage Integer32,
eoACPwrAttributesAvgCurrent Unsigned32,
eoACPwrAttributesFrequency Integer32,
eoACPwrAttributesPowerUnitMultiplier UnitMultiplier,
eoACPwrAttributesPowerAccuracy Integer32,
eoACPwrAttributesTotalActivePower Integer32,
eoACPwrAttributesTotalReactivePower Integer32,
eoACPwrAttributesTotalApparentPower Integer32,
eoACPwrAttributesTotalPowerFactor Integer32,
eoACPwrAttributesThdCurrent Integer32,
eoACPwrAttributesThdVoltage Integer32
}
eoACPwrAttributesConfiguration OBJECT-TYPE
SYNTAX INTEGER {
sngl(1),
del(2),
wye(3)
}
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Configuration describes the physical configurations of
the power supply lines:
* alternating current, single phase (SNGL)
* alternating current, three-phase delta (DEL)
* alternating current, three-phase Y (WYE)
Three-phase configurations can be either connected in a
triangular delta (DEL) or star Y (WYE) system. WYE
systems have a shared neutral voltage, while DEL systems
do not. Each phase is offset 120 degrees to each other."
::= { eoACPwrAttributesEntry 1 }
Chandramouli, et al. Standards Track [Page 53]RFC 7460 Power/Energy Monitoring and Control MIB March 2015
eoACPwrAttributesAvgVoltage OBJECT-TYPE
SYNTAX Integer32
UNITS "0.1 Volt AC"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"A measured value for average of the voltage measured
over an integral number of AC cycles. For a three-phase
system, this is the average voltage (V1+V2+V3)/3. IEC
61850-7-4 measured value attribute 'Vol'."
::= { eoACPwrAttributesEntry 2 }
eoACPwrAttributesAvgCurrent OBJECT-TYPE
SYNTAX Unsigned32
UNITS "amperes"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"A measured value for average of the current measured
over an integral number of AC cycles. For a three-phase
system, this is the average current (I1+I2+I3)/3. IEC
61850-7-4 attribute 'Amp'."
::= { eoACPwrAttributesEntry 3 }
eoACPwrAttributesFrequency OBJECT-TYPE
SYNTAX Integer32 (4500..6500)
UNITS "0.01 hertz"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"A measured value for the basic frequency of the AC
circuit. IEC 61850-7-4 attribute 'Hz'."
::= { eoACPwrAttributesEntry 4 }
eoACPwrAttributesPowerUnitMultiplier OBJECT-TYPE
SYNTAX UnitMultiplier
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The magnitude of watts for the usage value in
eoACPwrAttributesTotalActivePower,
eoACPwrAttributesTotalReactivePower,
and eoACPwrAttributesTotalApparentPower measurements.
For three-phase power systems, this will also include
eoACPwrAttributesWyeActivePower,
eoACPwrAttributesWyeReactivePower, and
eoACPwrAttributesWyeApparentPower."
::= { eoACPwrAttributesEntry 5 }
Chandramouli, et al. Standards Track [Page 54]RFC 7460 Power/Energy Monitoring and Control MIB March 2015
eoACPwrAttributesPowerAccuracy OBJECT-TYPE
SYNTAX Integer32 (0..10000)
UNITS "hundredths of percent"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object indicates a percentage value, in hundredths of a
percent, representing the presumed accuracy of active,
reactive, and apparent power usage reporting. For
example, 1010 means the reported usage is accurate to +/-
10.1 percent. This value is zero if the accuracy is
unknown.
ANSI and IEC define the following accuracy classes for
power measurement: IEC 62053-22 & 60044-1 class 0.1, 0.2,
0.5, 1, & 3.
ANSI C12.20 class 0.2 & 0.5"
::= { eoACPwrAttributesEntry 6 }
eoACPwrAttributesTotalActivePower OBJECT-TYPE
SYNTAX Integer32
UNITS "watts"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"A measured value of the actual power delivered to or
consumed by the load. IEC 61850-7-4 attribute 'TotW'."
::= { eoACPwrAttributesEntry 7 }
eoACPwrAttributesTotalReactivePower OBJECT-TYPE
SYNTAX Integer32
UNITS "volt-amperes reactive"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"A measured value of the reactive portion of the apparent
power. IEC 61850-7-4 attribute 'TotVAr'."
::= { eoACPwrAttributesEntry 8 }
eoACPwrAttributesTotalApparentPower OBJECT-TYPE
SYNTAX Integer32
UNITS "volt-amperes"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"A measured value of the voltage and current that
determines the apparent power. The apparent power is the
vector sum of real and reactive power.
Chandramouli, et al. Standards Track [Page 55]RFC 7460 Power/Energy Monitoring and Control MIB March 2015
Note: watts and volt-amperes are equivalent units and may
be combined. IEC 61850-7-4 attribute 'TotVA'."
::= { eoACPwrAttributesEntry 9 }
eoACPwrAttributesTotalPowerFactor OBJECT-TYPE
SYNTAX Integer32 (-10000..10000)
UNITS "hundredths"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"A measured value ratio of the real power flowing to the
load versus the apparent power. It is dimensionless and
expressed here as a percentage value in hundredths. A power
factor of 100% indicates there is no inductance load and
thus no reactive power. A Power Factor can be positive or
negative, where the sign should be in lead/lag (IEEE)
form. IEC 61850-7-4 attribute 'TotPF'."
::= { eoACPwrAttributesEntry 10 }
eoACPwrAttributesThdCurrent OBJECT-TYPE
SYNTAX Integer32 (0..10000)
UNITS "hundredths of percent"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"A calculated value for the current total harmonic
distortion (THD). Method of calculation is not
specified. IEC 61850-7-4 attribute 'ThdAmp'."
::= { eoACPwrAttributesEntry 11 }
eoACPwrAttributesThdVoltage OBJECT-TYPE
SYNTAX Integer32 (0..10000)
UNITS "hundredths of percent"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"A calculated value for the voltage total harmonic
distortion (THD). The method of calculation is not
specified. IEC 61850-7-4 attribute 'ThdVol'."
::= { eoACPwrAttributesEntry 12 }
eoACPwrAttributesDelPhaseTable OBJECT-TYPE
SYNTAX SEQUENCE OF EoACPwrAttributesDelPhaseEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This optional table describes three-phase power attributes
measurements in a DEL configuration with phase-to-phase
Chandramouli, et al. Standards Track [Page 56]RFC 7460 Power/Energy Monitoring and Control MIB March 2015
power attributes measurements. Entities having single
phase power shall not have any entities. This is a
sparse extension of the eoACPwrAttributesTable.
These attributes correspond to measurements related to
the IEC 61850-7.4 MMXU phase and measured harmonic or
interharmonics related to the MHAI phase."
::= { powerAttributesMIBObjects 2 }
eoACPwrAttributesDelPhaseEntry OBJECT-TYPE
SYNTAX EoACPwrAttributesDelPhaseEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry describes power measurements of a phase in a
DEL three-phase power. Three entries are required for each
supported entPhysicalIndex entry. Voltage measurements
are provided relative to each other.
For phase-to-phase measurements, the
eoACPwrAttributesDelPhaseIndex is compared against the
following phase at +120 degrees. Thus, the possible
values are:
eoACPwrAttributesDelPhaseIndex Next Phase Angle
0 120
120 240
240 0
"
INDEX { entPhysicalIndex, eoACPwrAttributesDelPhaseIndex }
::= { eoACPwrAttributesDelPhaseTable 1}
EoACPwrAttributesDelPhaseEntry ::= SEQUENCE {
eoACPwrAttributesDelPhaseIndex Integer32,
eoACPwrAttributesDelPhaseToNextPhaseVoltage Integer32,
eoACPwrAttributesDelThdPhaseToNextPhaseVoltage Integer32
}
eoACPwrAttributesDelPhaseIndex OBJECT-TYPE
SYNTAX Integer32 (0..359)
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A phase angle typically corresponding to 0, 120, 240."
::= { eoACPwrAttributesDelPhaseEntry 1 }
eoACPwrAttributesDelPhaseToNextPhaseVoltage OBJECT-TYPE
SYNTAX Integer32
Chandramouli, et al. Standards Track [Page 57]RFC 7460 Power/Energy Monitoring and Control MIB March 2015
UNITS "0.1 Volt AC"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"A measured value of phase to next phase voltages, where
the next phase is IEC 61850-7-4 attribute 'PPV'."
::= { eoACPwrAttributesDelPhaseEntry 2 }
eoACPwrAttributesDelThdPhaseToNextPhaseVoltage OBJECT-TYPE
SYNTAX Integer32 (0..10000)
UNITS "hundredths of percent"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"A calculated value for the voltage total harmonic
distortion for phase to next phase. Method of calculation
is not specified. IEC 61850-7-4 attribute 'ThdPPV'."
::= { eoACPwrAttributesDelPhaseEntry 3 }
eoACPwrAttributesWyePhaseTable OBJECT-TYPE
SYNTAX SEQUENCE OF EoACPwrAttributesWyePhaseEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This optional table describes three-phase power attributes
measurements in a WYE configuration with phase-to-neutral
power attributes measurements. Entities having single
phase power shall not have any entities. This is a sparse
extension of the eoACPwrAttributesTable.
These attributes correspond to measurements related to
the IEC 61850-7.4 MMXU phase and measured harmonic or
interharmonics related to the MHAI phase."
::= { powerAttributesMIBObjects 3 }
eoACPwrAttributesWyePhaseEntry OBJECT-TYPE
SYNTAX EoACPwrAttributesWyePhaseEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This table describes measurements of a phase in a WYE
three-phase power system. Three entries are required for
each supported entPhysicalIndex entry. Voltage
measurements are relative to neutral.
Each entry describes power attributes of one phase of a
WYE three-phase power system."
INDEX { entPhysicalIndex, eoACPwrAttributesWyePhaseIndex }
Chandramouli, et al. Standards Track [Page 58]RFC 7460 Power/Energy Monitoring and Control MIB March 2015
::= { eoACPwrAttributesWyePhaseTable 1}
EoACPwrAttributesWyePhaseEntry ::= SEQUENCE {
eoACPwrAttributesWyePhaseIndex Integer32,
eoACPwrAttributesWyePhaseToNeutralVoltage Integer32,
eoACPwrAttributesWyeCurrent Integer32,
eoACPwrAttributesWyeActivePower Integer32,
eoACPwrAttributesWyeReactivePower Integer32,
eoACPwrAttributesWyeApparentPower Integer32,
eoACPwrAttributesWyePowerFactor Integer32,
eoACPwrAttributesWyeThdCurrent Integer32,
eoACPwrAttributesWyeThdPhaseToNeutralVoltage Integer32
}
eoACPwrAttributesWyePhaseIndex OBJECT-TYPE
SYNTAX Integer32 (0..359)
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A phase angle typically corresponding to 0, 120, 240."
::= { eoACPwrAttributesWyePhaseEntry 1 }
eoACPwrAttributesWyePhaseToNeutralVoltage OBJECT-TYPE
SYNTAX Integer32
UNITS "0.1 Volt AC"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"A measured value of phase to neutral voltage. IEC
61850-7-4 attribute 'PNV'."
::= { eoACPwrAttributesWyePhaseEntry 2 }
eoACPwrAttributesWyeCurrent OBJECT-TYPE
SYNTAX Integer32
UNITS "0.1 amperes AC"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"A measured value of phase currents. IEC 61850-7-4
attribute 'A'."
::= { eoACPwrAttributesWyePhaseEntry 3 }
eoACPwrAttributesWyeActivePower OBJECT-TYPE
SYNTAX Integer32
UNITS "watts"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
Chandramouli, et al. Standards Track [Page 59]RFC 7460 Power/Energy Monitoring and Control MIB March 2015
"A measured value of the actual power delivered to or
consumed by the load with the magnitude indicated
separately in eoPowerUnitMultiplier. IEC 61850-7-4
attribute 'W'."
::= { eoACPwrAttributesWyePhaseEntry 4 }
eoACPwrAttributesWyeReactivePower OBJECT-TYPE
SYNTAX Integer32
UNITS "volt-amperes reactive"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"A measured value of the reactive portion of the apparent
power with the magnitude of indicated separately in
eoPowerUnitMultiplier. IEC 61850-7-4 attribute 'VAr'."
::= { eoACPwrAttributesWyePhaseEntry 5 }
eoACPwrAttributesWyeApparentPower OBJECT-TYPE
SYNTAX Integer32
UNITS "volt-amperes"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"A measured value of the voltage and current determines
the apparent power with the indicated separately in
eoPowerUnitMultiplier. Active plus reactive power equals
the total apparent power.
Note: Watts and volt-amperes are equivalent units and may
be combined. IEC 61850-7-4 attribute 'VA'."
::= { eoACPwrAttributesWyePhaseEntry 6 }
eoACPwrAttributesWyePowerFactor OBJECT-TYPE
SYNTAX Integer32 (-10000..10000)
UNITS "hundredths"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"A measured value ratio of the real power flowing to the
load versus the apparent power for this phase. IEC
61850-7-4 attribute 'PF'. Power Factor can be positive or
negative where the sign should be in lead/lag (IEEE)
form."
::= { eoACPwrAttributesWyePhaseEntry 7 }
eoACPwrAttributesWyeThdCurrent OBJECT-TYPE
SYNTAX Integer32 (0..10000)
UNITS "hundredths of percent"
Chandramouli, et al. Standards Track [Page 60]RFC 7460 Power/Energy Monitoring and Control MIB March 2015
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"A calculated value for the voltage total harmonic
distortion (THD) for phase to phase. Method of
calculation is not specified.
IEC 61850-7-4 attribute 'ThdA'."
::= { eoACPwrAttributesWyePhaseEntry 8 }
eoACPwrAttributesWyeThdPhaseToNeutralVoltage OBJECT-TYPE
SYNTAX Integer32 (0..10000)
UNITS "hundredths of percent"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"A calculated value of the voltage total harmonic
distortion (THD) for phase to neutral. IEC 61850-7-4
attribute 'ThdPhV'."
::= { eoACPwrAttributesWyePhaseEntry 9 }
-- Conformance
powerAttributesMIBCompliances OBJECT IDENTIFIER
::= { powerAttributesMIB 2 }
powerAttributesMIBGroups OBJECT IDENTIFIER
::= { powerAttributesMIB 3 }
powerAttributesMIBFullCompliance MODULE-COMPLIANCE
STATUS current
DESCRIPTION
"When this MIB is implemented with support for read-
create, then such an implementation can claim full
compliance. Such devices can then be both monitored and
configured with this MIB.
Module Compliance of RFC 6933 with respect to
entity4CRCompliance MUST be supported which requires
implementation of four MIB objects: entPhysicalIndex,
entPhysicalClass, entPhysicalName, and entPhysicalUUID."
REFERENCE
"RFC 6933: Entity MIB (Version 4)"
MODULE -- this module
MANDATORY-GROUPS {
powerACPwrAttributesMIBTableGroup
}
GROUP powerACPwrAttributesOptionalMIBTableGroup
Chandramouli, et al. Standards Track [Page 61]RFC 7460 Power/Energy Monitoring and Control MIB March 2015
DESCRIPTION
"A compliant implementation does not have
to implement."
GROUP powerACPwrAttributesDelPhaseMIBTableGroup
DESCRIPTION
"A compliant implementation does not have to implement."
GROUP powerACPwrAttributesWyePhaseMIBTableGroup
DESCRIPTION
"A compliant implementation does not have to implement."
::= { powerAttributesMIBCompliances 1 }
-- Units of Conformance
powerACPwrAttributesMIBTableGroup OBJECT-GROUP
OBJECTS {
-- Note that object entPhysicalIndex is NOT
-- included since it is not-accessible
eoACPwrAttributesAvgVoltage,
eoACPwrAttributesAvgCurrent,
eoACPwrAttributesFrequency,
eoACPwrAttributesPowerUnitMultiplier,
eoACPwrAttributesPowerAccuracy,
eoACPwrAttributesTotalActivePower,
eoACPwrAttributesTotalReactivePower,
eoACPwrAttributesTotalApparentPower,
eoACPwrAttributesTotalPowerFactor
}
STATUS current
DESCRIPTION
"This group contains the collection of all the power
attributes objects related to the Energy Object."
::= { powerAttributesMIBGroups 1 }
powerACPwrAttributesOptionalMIBTableGroup OBJECT-GROUP
OBJECTS {
eoACPwrAttributesConfiguration,
eoACPwrAttributesThdCurrent,
eoACPwrAttributesThdVoltage
}
STATUS current
DESCRIPTION
"This group contains the collection of all the power
attributes objects related to the Energy Object."
::= { powerAttributesMIBGroups 2 }
powerACPwrAttributesDelPhaseMIBTableGroup OBJECT-GROUP
Chandramouli, et al. Standards Track [Page 62]RFC 7460 Power/Energy Monitoring and Control MIB March 2015
OBJECTS {
-- Note that object entPhysicalIndex and
-- eoACPwrAttributesDelPhaseIndex are NOT
-- included since they are not-accessible
eoACPwrAttributesDelPhaseToNextPhaseVoltage,
eoACPwrAttributesDelThdPhaseToNextPhaseVoltage
}
STATUS current
DESCRIPTION
"This group contains the collection of all power
attributes of a phase in a DEL three-phase power system."
::= { powerAttributesMIBGroups 3 }
powerACPwrAttributesWyePhaseMIBTableGroup OBJECT-GROUP
OBJECTS {
-- Note that object entPhysicalIndex and
-- eoACPwrAttributesWyePhaseIndex are NOT
-- included since they are not-accessible
eoACPwrAttributesWyePhaseToNeutralVoltage,
eoACPwrAttributesWyeCurrent,
eoACPwrAttributesWyeActivePower,
eoACPwrAttributesWyeReactivePower,
eoACPwrAttributesWyeApparentPower,
eoACPwrAttributesWyePowerFactor,
eoACPwrAttributesWyeThdPhaseToNeutralVoltage,
eoACPwrAttributesWyeThdCurrent
}
STATUS current
DESCRIPTION
"This group contains the collection of all power
attributes of a phase in a WYE three-phase power system."
::= { powerAttributesMIBGroups 4 }
END
10. Security Considerations
There are a number of management objects defined in this MIB module
with a MAX-ACCESS clause of read-write and/or read-create. Such
objects may be considered sensitive or vulnerable in some network
environments. The support for SET operations in a non-secure
environment without proper protection opens devices to attack. These
are the tables and objects and their sensitivity/vulnerability:
- Unauthorized changes to the eoPowerOperState (via the
eoPowerAdminState ) MAY disrupt the power settings of the
differentEnergy Objects and, therefore, the state of
functionality of the respective Energy Objects.
Chandramouli, et al. Standards Track [Page 63]RFC 7460 Power/Energy Monitoring and Control MIB March 2015
- Unauthorized changes to the eoEnergyParametersTable MAY disrupt
energy measurement in the eoEnergyTable table.
SNMP versions prior to SNMPv3 did not include adequate security.
Even if the network itself is secure (for example by using IPsec),
there is no control as to who on the secure network is allowed to
access and GET/SET (read/change/create/delete) the objects in this
MIB module.
Implementations SHOULD provide the security features described by the
SNMPv3 framework (see [RFC3410]), and implementations claiming
compliance to the SNMPv3 standard MUST include full support for
authentication and privacy via the User-based Security Model (USM)
[RFC3414] with the AES cipher algorithm [RFC3826]. Implementations
MAY also provide support for the Transport Security Model (TSM)
[RFC5591] in combination with a secure transport such as SSH
[RFC5592] or TLS/DTLS [RFC6353].
Further, deployment of SNMP versions prior to SNMPv3 is NOT
RECOMMENDED. Instead, it is RECOMMENDED to deploy SNMPv3 and to
enable cryptographic security. It is then a customer/operator
responsibility to ensure that the SNMP entity giving access to an
instance of this MIB module is properly configured to give access to
the objects only to those principals (users) that have legitimate
rights to indeed GET or SET (change/create/delete) them.
In certain situations, energy and power monitoring can reveal
sensitive information about individuals' activities and habits.
Implementors of this specification should use appropriate privacy
protections as discussed in Section 9 of RFC 6988 and monitoring of
individuals and homes should only occur with proper authorization.
11. IANA Considerations
The MIB modules in this document use the following IANA-assigned
OBJECT IDENTIFIER values recorded in the SMI Numbers registry:
Descriptor OBJECT IDENTIFIER value
---------- -----------------------
IANAPowerStateSet-MIB { mib-2 228 }
energyObjectMIB { mib-2 229 }
powerAttributesMIB { mib-2 230 }
Chandramouli, et al. Standards Track [Page 64]RFC 7460 Power/Energy Monitoring and Control MIB March 2015
11.1. IANAPowerStateSet-MIB Module
The initial set of Power State Sets are specified in [RFC7326]. IANA
maintains a Textual Convention PowerStateSet in the
IANAPowerStateSet-MIB module (see Section 9.1), with the initial set
of Power State Sets and the Power States within those Power State
Sets as proposed in the [RFC7326]. The current version of
PowerStateSet Textual Convention can be accessed
<http://www.iana.org/assignments/power-state-sets>.
New assignments (and potential deprecation) to Power State Sets shall
be administered by IANA and the guidelines and procedures are
specified in [RFC7326], and will, as a consequence, update the
PowerStateSet Textual Convention.
12. References
12.1. Normative References
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119, March 1997,
<http://www.rfc-editor.org/info/rfc2119>.
[RFC2578] McCloghrie, K., Ed., Perkins, D., Ed., and J.
Schoenwaelder, Ed., "Structure of Management
Information Version 2 (SMIv2)", STD 58, RFC 2578,
April 1999, <http://www.rfc-editor.org/info/rfc2578>.
[RFC2579] McCloghrie, K., Ed., Perkins, D., Ed., and J.
Schoenwaelder, Ed., "Textual Conventions for SMIv2",
STD 58, RFC 2579, April 1999,
<http://www.rfc-editor.org/info/rfc2579>.
[RFC2580] McCloghrie, K., Ed., Perkins, D., Ed., and J.
Schoenwaelder, Ed., "Conformance Statements for
SMIv2", STD 58, RFC 2580, April 1999,
<http://www.rfc-editor.org/info/rfc2580>.
[RFC3414] Blumenthal, U. and B. Wijnen, "User-based Security
Model (USM) for version 3 of the Simple Network
Management Protocol (SNMPv3)", STD 62, RFC 3414,
December 2002,
<http://www.rfc-editor.org/info/rfc3414>.
[RFC3621] Berger, A. and D. Romascanu, "Power Ethernet MIB",
RFC 3621, December 2003,
<http://www.rfc-editor.org/info/rfc3621>.
Chandramouli, et al. Standards Track [Page 65]RFC 7460 Power/Energy Monitoring and Control MIB March 2015
[RFC3826] Blumenthal, U., Maino, F., and K. McCloghrie, "The
Advanced Encryption Standard (AES) Cipher Algorithm
in the SNMP User-based Security Model", RFC 3826,
June 2004, <http://www.rfc-editor.org/info/rfc3826>.
[RFC5591] Harrington, D. and W. Hardaker, "Transport Security
Model for the Simple Network Management Protocol
(SNMP)", STD 78, RFC 5591, June 2009,
<http://www.rfc-editor.org/info/rfc5591>.
[RFC5592] Harrington, D., Salowey, J., and W. Hardaker, "Secure
Shell Transport Model for the Simple Network
Management Protocol (SNMP)", RFC 5592, June 2009,
<http://www.rfc-editor.org/info/rfc5592>.
[RFC6353] Hardaker, W., "Transport Layer Security (TLS)
Transport Model for the Simple Network Management
Protocol (SNMP)", STD 78, RFC 6353, July 2011,
<http://www.rfc-editor.org/info/rfc6353>.
[RFC6933] Bierman, A., Romascanu, D., Quittek, J., and M.
Chandramouli, "Entity MIB (Version 4)", RFC 6933, May
2013, <http://www.rfc-editor.org/info/rfc6933>.
[RFC7461] Parello, J., Claise, B., and M. Chandramouli, "Energy
Object Context MIB", RFC 7461, March 2015,
<http://www.rfc-editor.org/info/rfc7461>.
[LLDP-MED-MIB] ANSI/TIA-1057, "The LLDP Management Information Base
extension module for TIA-TR41.4 media endpoint
discovery information", July 2005.
12.2. Informative References
[RFC1628] Case, J., Ed., "UPS Management Information Base", RFC
1628, May 1994,
<http://www.rfc-editor.org/info/rfc1628>.
[RFC3410] Case, J., Mundy, R., Partain, D., and B. Stewart,
"Introduction and Applicability Statements for
Internet-Standard Management Framework", RFC 3410,
December 2002,
<http://www.rfc-editor.org/info/rfc3410>.
[RFC3418] Presuhn, R., Ed., "Management Information Base (MIB)
for the Simple Network Management Protocol (SNMP)",
STD 62, RFC 3418, December 2002,
<http://www.rfc-editor.org/info/rfc3418>.
Chandramouli, et al. Standards Track [Page 66]RFC 7460 Power/Energy Monitoring and Control MIB March 2015
[RFC3433] Bierman, A., Romascanu, D., and K. Norseth, "Entity
Sensor Management Information Base", RFC 3433,
December 2002,
<http://www.rfc-editor.org/info/rfc3433>.
[RFC4268] Chisholm, S. and D. Perkins, "Entity State MIB", RFC
4268, November 2005,
<http://www.rfc-editor.org/info/rfc4268>.
[RFC6988] Quittek, J., Ed., Chandramouli, M., Winter, R.,
Dietz, T., and B. Claise, "Requirements for Energy
Management", RFC 6988, September 2013,
<http://www.rfc-editor.org/info/rfc6988>.
[RFC7326] Parello, J., Claise, B., Schoening, B., and J.
Quittek, "Energy Management Framework", RFC 7326,
September 2014,
<http://www.rfc-editor.org/info/rfc7326>.
[DMTF] DMTF, "Power State Management Profile", DSP1027,
Version 2.0, December 2009,
http://www.dmtf.org/sites/default/files/standards
/documents/DSP1027_2.0.0.pdf
[EMAN-AS] Schoening, B., Chandramouli, M., and B. Nordman,
"Energy Management (EMAN) Applicability Statement",
Work in Progress, draft-ietf-eman-applicability-
statement-08, December 2014.
[IEC.61850-7-4] International Electrotechnical Commission,
"Communication networks and systems for power utility
automation -- Part 7-4: Basic communication
structure -- Compatible logical node classes and
data object classes", March 2010.
[IEC.62053-21] International Electrotechnical Commission,
"Electricity metering equipment (a.c.) -- Particular
requirements -- Part 21: Static meters for active
energy (classes 1 and 2)", January 2003.
[IEC.62053-22] International Electrotechnical Commission,
"Electricity metering equipment (a.c.) -- Particular
requirements -- Part 22: Static meters for active
energy (classes 0,2 S and 0,5 S)", January 2003.
Chandramouli, et al. Standards Track [Page 67]RFC 7460 Power/Energy Monitoring and Control MIB March 2015
[IEEE1621] "Standard for User Interface Elements in Power
Control of Electronic Devices Employed in
Office/Consumer Environments", IEEE 1621, December
2004.
Acknowledgments
The authors would like to thank Shamita Pisal for her prototype of
this MIB module and her valuable feedback. The authors would like to
Michael Brown for improving the text dramatically.
The authors would like to thank Juergen Schoenwalder for proposing
the design of the Textual Convention for PowerStateSet and Ira
McDonald for his feedback. Special appreciation to Laurent Guise for
his review and input on power quality measurements. Thanks for the
many comments on the design of the EnergyTable from Minoru Teraoka
and Hiroto Ogaki.
Many thanks to Alan Luchuk for the detailed review of the MIB and his
comments.
And finally, thanks to the EMAN chairs: Nevil Brownlee and Tom
Nadeau.
Contributors
This document results from the merger of two initial proposals. The
following persons made significant contributions either in one of the
initial proposals or in this document:
John Parello
Rolf Winter
Dominique Dudkowski
Chandramouli, et al. Standards Track [Page 68]RFC 7460 Power/Energy Monitoring and Control MIB March 2015
Authors' Addresses
Mouli Chandramouli
Cisco Systems, Inc.
Sarjapur Outer Ring Road
Bangalore 560103
India
Phone: +91 80 4429 2409
EMail: moulchan@cisco.com
Benoit Claise
Cisco Systems, Inc.
De Kleetlaan 6a b1
Diegem 1813
Belgium
Phone: +32 2 704 5622
EMail: bclaise@cisco.com
Brad Schoening
44 Rivers Edge Drive
Little Silver, NJ 07739
United States
EMail: brad.schoening@verizon.net
Juergen Quittek
NEC Europe, Ltd.
NEC Laboratories Europe
Network Research Division
Kurfuersten-Anlage 36
Heidelberg 69115
Germany
Phone: +49 6221 4342-115
EMail: quittek@neclab.eu
Thomas Dietz
NEC Europe, Ltd.
NEC Laboratories Europe
Network Research Division
Kurfuersten-Anlage 36
Heidelberg 69115
Germany
Phone: +49 6221 4342-128
EMail: Thomas.Dietz@neclab.eu
Chandramouli, et al. Standards Track [Page 69]
