Internet Draft Avi Berger
PowerDsine Inc.
Dan Romascanu
Avaya
22 June 2003
Power Ethernet MIB
<draft-ietf-hubmib-power-ethernet-mib-08.txt>
Status of this Memo
This document is an Internet-Draft and is in full conformance with
all provisions of Section 10 of RFC2026. Internet-Drafts are working
documents of the Internet Engineering Task Force (IETF), its areas,
and its working groups. Note that other groups may also distribute
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Internet-Drafts are draft documents valid for a maximum of six months
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material or to cite them other than as "work in progress."
To view the list Internet-Draft Shadow Directories, see
http://www.ietf.org/shadow.html.
Copyright Notice
Copyright (C) The Internet Society (2003). All Rights Reserved.
Abstract
This memo defines a portion of the Management Information Base (MIB)
for use with network management protocols in the Internet community.
The document proposes an extension to the Ethernet-like Interfaces
MIB with a set of objects for managing a Power Source Equipment
(PSE).
Distribution of this memo is unlimited.
Table of Contents
Status of this Memo 1
Abstract 1
1 Introduction 2
2 The Internet-Standard Management Framework 2
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3 Overview 2
4 MIB Structure 3
5 Definitions 3
6 Acknowledgements 17
7 Normative References 17
8 Informative References 18
9 Intellectual Property 18
10 Security Considerations 18
11 Authors Addresses 20
A Full Copyright Statement 20
1. Introduction
This memo defines a portion of the Management Information Base (MIB)
for use with network management protocols in the Internet community.
In particular, it defines a set of MIB objects to manage a Power
Ethernet [IEEE-802.3af] Source Equipment (PSE).
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in [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 a MIB
module that is compliant to the SMIv2, which is described in STD 58,
RFC 2578 [RFC2578], STD 58, RFC 2579 [RFC2579] and STD 58, RFC 2580
[RFC2580].
3. Overview
The emergence of IP telephony as an application that allows for voice
applications to be run over the same infrastructure as data
applications led to the emergence of Ethernet IP phones, with similar
functions and characteristics as the traditional phones. Powering a
phone is one of these functions that are being taken as granted. The
IEEE 802.3 Working Group initiated a standard work on this subject,
currently known as the IEEE 802.3af work [IEEE-802.3af].
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The IEEE 802.3af WG did not define a full management interface, but
only the hardware registers that will allow for a management
interfaces to be built for a powered Ethernet device. The MIB module
defined in this document extends the Ethernet-like Interfaces MIB
[RFC2665] with the management objects required for the management of
the powered Ethernet devices and ports.
The following abbreviations are defined in [IEEE-802.3af] and will be
used with the same significance in this document:
PSE - Power Sourcing Equipment;
PD - Powered Device
4. MIB Structure
This MIB objects are included in three MIB groups.
The pethPsePortTable defines the objects used for the configuration
and describing the status of ports on a PSE device. Examples of PSE
devices are Ethernet switches that support power Ethernet and mid-
span boxes.
The pethMainPseObjects MIB group defines the management objects for a
managed main power source in a PSE device. Ethernet switches are one
example of boxes that would support these objects.
The pethNotificationControlTable includes objects that control the
transmission of notifications by the agent to a management
application.
5. Definitions
POWER-ETHERNET-MIB DEFINITIONS ::= BEGIN
IMPORTS
MODULE-IDENTITY, mib-2, OBJECT-TYPE, Integer32,
Gauge32, Counter32, NOTIFICATION-TYPE
FROM SNMPv2-SMI
TruthValue
FROM SNMPv2-TC
MODULE-COMPLIANCE, OBJECT-GROUP, NOTIFICATION-GROUP
FROM SNMPv2-CONF
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SnmpAdminString
FROM SNMP-FRAMEWORK-MIB;
powerEthernetMIB MODULE-IDENTITY
LAST-UPDATED "200306220000Z" -- June 22, 2003
ORGANIZATION "IETF Ethernet Interfaces and Hub MIB
Working Group"
CONTACT-INFO
"
WG Charter:
http://www.ietf.org/html.charters/hubmib-charter.html
Mailing lists:
General Discussion: hubmib@ietf.org
To Subscribe: hubmib-requests@ietf.org
In Body: subscribe your_email_address
Chair: Dan Romascanu
Avaya
Tel: +972-3-645-8414
Email: dromasca@avaya.com
Editor: Avi Berger
PowerDsine Inc.
Tel: 972-9-7755100 Ext 307
Fax: 972-9-7755120
E-mail: avib@PowerDsine.com
"
DESCRIPTION
"The MIB module for managing Power Source Equipment
(PSE) working according to the IEEE 802.af Powered
Ethernet (DTE Power via MDI) standard.
The following terms are used throughout this
MIB module. For complete formal definitions,
the IEEE 802.3 standards should be consulted
wherever possible:
Group - A recommended, but optional, entity
defined by the IEEE 802.3 management standard,
in order to support a modular numbering scheme.
The classical example allows an implementor to
represent field-replaceable units as groups of
ports, with the port numbering matching the
modular hardware implementation.
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Port - This entity identifies the port within the group
for which this entry contains information. The numbering
scheme for ports is implementation specific.
Copyright (c) The Internet Society (2003). This version of
this MIB module is part of RFC yyyy; See the RFC itself
for full legal notices.
-- RFC Ed.: replace yyyy with the actual RFC number & remove this notice.
"
REVISION "200306220000Z" -- June 22, 2003
DESCRIPTION "Initial version, published as RFC yyyy."
-- RFC Ed.: replace yyyy with actual RFC number & remove this notice
::= { mib-2 XXX }
-- RFC Ed.: replace XXX with IANA-assigned number & remove this notice
pethNotifications OBJECT IDENTIFIER ::= { powerEthernetMIB 0 }
pethObjects OBJECT IDENTIFIER ::= { powerEthernetMIB 1 }
pethConformance OBJECT IDENTIFIER ::= { powerEthernetMIB 2 }
-- PSE Objects
pethPsePortTable OBJECT-TYPE
SYNTAX SEQUENCE OF PethPsePortEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A table of objects that display and control the power
characteristics power Ethernet ports on a Power Source
Entity (PSE) device. This group will be implemented in
managed power Ethernet switches and mid-span devices.
Values of all read-write objects in this table are
persistent at restart/reboot."
::= { pethObjects 1 }
pethPsePortEntry OBJECT-TYPE
SYNTAX PethPsePortEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A set of objects that display and control the power
characteristics of a power Ethernet PSE port."
INDEX { pethPsePortGroupIndex , pethPsePortIndex }
::= { pethPsePortTable 1 }
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PethPsePortEntry ::= SEQUENCE {
pethPsePortGroupIndex
Integer32,
pethPsePortIndex
Integer32,
pethPsePortAdminEnable
TruthValue,
pethPsePortPowerPairsControlAbility
TruthValue,
pethPsePortPowerPairs
INTEGER,
pethPsePortDetectionStatus
INTEGER,
pethPsePortPowerPriority
INTEGER,
pethPsePortMPSAbsentCounter
Counter32,
pethPsePortInvalidSignatureCounter
Counter32,
pethPsePortPowerDeniedCounter
Counter32,
pethPsePortOverLoadCounter
Counter32,
pethPsePortShortCounter
Counter32,
pethPsePortType
SnmpAdminString,
pethPsePortPowerClassifications
INTEGER
}
pethPsePortGroupIndex OBJECT-TYPE
SYNTAX Integer32 (1..2147483647)
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This variable uniquely identifies the group
containing the port to which a power Ethernet PSE is
connected. Group means box in the stack, module in a
rack and the value 1 MUST be used for non-modular devices.
Furthermore, the same value MUST be used in this variable,
pethMainPseGroupIndex, and pethNotificationControlGroupIndex
to refer to a given box in a stack or module in the rack."
::= { pethPsePortEntry 1 }
pethPsePortIndex OBJECT-TYPE
SYNTAX Integer32 (1..2147483647)
MAX-ACCESS not-accessible
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STATUS current
DESCRIPTION
"This variable uniquely identifies the power Ethernet PSE
port within group pethPsePortGroupIndex to which the
power Ethernet PSE entry is connected."
::= { pethPsePortEntry 2 }
pethPsePortAdminEnable OBJECT-TYPE
SYNTAX TruthValue
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"true (1) An interface which can provide the PSE functions.
false(2) The interface will act as it would if it had no PSE
function."
REFERENCE
"IEEE Std 802.3af Section 30.9.1.1.2 aPSEAdminState"
::= { pethPsePortEntry 3 }
pethPsePortPowerPairsControlAbility OBJECT-TYPE
SYNTAX TruthValue
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Describes the capability of controlling the power pairs
functionality to switch pins for sourcing power.
The value true indicate that the device has the capability
to control the power pairs. When false the PSE Pinout
Alternative used cannot be controlled through the
PethPsePortAdminEnabe attribute."
REFERENCE
"IEEE Std 802.3af Section 30.9.1.1.3
aPSEPowerPairsControlAbility"
::= { pethPsePortEntry 4 }
pethPsePortPowerPairs OBJECT-TYPE
SYNTAX INTEGER {
signal(1),
spare(2)
}
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"Describes or controls the pairs in use. If the value of
pethPsePortPowerPairsControl is true, this object is
writable.
A value of signal(1) menas that the signal pairs
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only are in use.
A value of spare(2) means that the spare pairs
only are in use."
REFERENCE
"IEEE Std 802.3af Section 30.9.1.1.4 aPSEPowerPairs"
::= { pethPsePortEntry 5 }
pethPsePortDetectionStatus OBJECT-TYPE
SYNTAX INTEGER {
disabled(1),
searching(2),
deliveringPower(3),
fault(4),
test(5),
otherFault(6)
}
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Describes the operational status of the port PD detection.
A value of disabled(1)- indicates that the PSE State diagram
is in the state DISABLED.
A value of deliveringPower(3) - indicates that the PSE State
diagram is in the state POWER_ON for a duration greater than
tlim max (see IEEE Std 802.3af Table 33-5 tlim).
A value of fault(4) - indicates that the PSE State diagram is
in the state TEST_ERROR.
A value of test(5) - indicates that the PSE State diagram is
in the state TEST_MODE.
A value of otherFault(6) - indicates that the PSE State
diagram is in the state IDLE due to the variable
error_conditions.
A value of searching(2)- indicates the PSE State diagram is
in a state other than those listed above."
REFERENCE
"IEEE Std 802.3af Section 30.9.1.1.5
aPSEPowerDetectionStatus"
::= { pethPsePortEntry 6 }
pethPsePortPowerPriority OBJECT-TYPE
SYNTAX INTEGER {
critical(1),
high(2),
low(3)
}
MAX-ACCESS read-write
STATUS current
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DESCRIPTION
"This object controls the priority of the port from the point
of view of a power management algorithm. The priority that
is set by this variable could be used by a control mechanism
that prevents over current situations by disconnecting first
ports with lower power priority. Ports that connect devices
critical to the operation of the network - like the E911
telephones ports - should be set to higher priority."
::= { pethPsePortEntry 7 }
pethPsePortMPSAbsentCounter OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This counter is incremented when the PSE state diagram
transitions directly from the state POWER_ON to the
state IDLE due to tmpdo_timer_done being asserted."
REFERENCE
"IEEE Std 802.3af Section 30.9.1.1.11
aPSEMPSAbsentCounter"
::= { pethPsePortEntry 8 }
pethPsePortType OBJECT-TYPE
SYNTAX SnmpAdminString
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"A manager will set the value of this variable to indicate
the type of powered device that is connected to the port.
The default value supplied by the agent if no value has
ever been set should be a zero-length octet string."
::= { pethPsePortEntry 9 }
pethPsePortPowerClassifications OBJECT-TYPE
SYNTAX INTEGER {
class0(1),
class1(2),
class2(3),
class3(4),
class4(5)
}
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Classification is a way to tag different terminals on the
Power over LAN network according to their power consumption.
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Devices such as IP telephones, WLAN access points and others,
will be classified according to their power requirements.
The meaning of the classification labels is defined in the
IEEE specification.
This variable is valid only while a PD is being powered,
that is, while the attribute pethPsePortDetectionStatus
is reporting the enumeration deliveringPower."
REFERENCE
"IEEE Std 802.3af Section 30.9.1.1.6
aPSEPowerClassification"
::= { pethPsePortEntry 10 }
pethPsePortInvalidSignatureCounter OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This counter is incremented when the PSE state diagram
enters the state SIGNATURE_INVALID."
REFERENCE
"IEEE Std 802.3af Section 30.9.1.1.7
aPSEInvalidSignatureCounter"
::= { pethPsePortEntry 11 }
pethPsePortPowerDeniedCounter OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This counter is incremented when the PSE state diagram
enters the state POWER_DENIED."
REFERENCE
"IEEE Std 802.3af Section 30.9.1.1.8
aPSEPowerDeniedCounter"
::= { pethPsePortEntry 12 }
pethPsePortOverLoadCounter OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This counter is incremented when the PSE state diagram
enters the state ERROR_DELAY_OVER."
REFERENCE
"IEEE Std 802.3af Section 30.9.1.1.9
aPSEOverLoadCounter"
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::= { pethPsePortEntry 13 }
pethPsePortShortCounter OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This counter is incremented when the PSE state diagram
enters the state ERROR_DELAY_SHORT."
REFERENCE
"IEEE Std 802.3af Section 30.9.1.1.10
aPSEShortCounter"
::= { pethPsePortEntry 14 }
-- Main PSE Objects
pethMainPseObjects OBJECT IDENTIFIER ::= { pethObjects 3 }
pethMainPseTable OBJECT-TYPE
SYNTAX SEQUENCE OF PethMainPseEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A table of objects that display and control attributes
of the main power source in a PSE device. Ethernet
switches are one example of boxes that would support
these objects.
Values of all read-write objects in this table are
persistent at restart/reboot."
::= { pethMainPseObjects 1 }
pethMainPseEntry OBJECT-TYPE
SYNTAX PethMainPseEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A set of objects that display and control the Main
power of a PSE. "
INDEX { pethMainPseGroupIndex }
::= { pethMainPseTable 1 }
PethMainPseEntry ::= SEQUENCE {
pethMainPseGroupIndex
Integer32,
pethMainPsePower
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Gauge32 ,
pethMainPseOperStatus
INTEGER,
pethMainPseConsumptionPower
Gauge32,
pethMainPseUsageThreshold
Integer32
}
pethMainPseGroupIndex OBJECT-TYPE
SYNTAX Integer32 (1..2147483647)
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This variable uniquely identifies the group to which
power Ethernet PSE is connected. Group means (box in
the stack, module in a rack) and the value 1 MUST be
used for non-modular devices. Furthermore, the same
value MUST be used in this variable, pethPsePortGroupIndex,
and pethNotificationControlGroupIndex to refer to a
given box in a stack or module in a rack."
::= { pethMainPseEntry 1 }
pethMainPsePower OBJECT-TYPE
SYNTAX Gauge32 (1..65535)
UNITS "Watts"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The nominal power of the PSE expressed in Watts."
::= { pethMainPseEntry 2 }
pethMainPseOperStatus OBJECT-TYPE
SYNTAX INTEGER {
on(1),
off(2),
faulty(3)
}
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The operational status of the main PSE."
::= { pethMainPseEntry 3 }
pethMainPseConsumptionPower OBJECT-TYPE
SYNTAX Gauge32
UNITS "Watts"
MAX-ACCESS read-only
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STATUS current
DESCRIPTION
"Measured usage power expressed in Watts."
::= { pethMainPseEntry 4 }
pethMainPseUsageThreshold OBJECT-TYPE
SYNTAX Integer32 (1..99)
UNITS "%"
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"The usage threshold expressed in percents for
comparing the measured power and initiating
an alarm if the threshold is exceeded."
::= { pethMainPseEntry 5 }
-- Notification Control Objects
pethNotificationControl OBJECT IDENTIFIER ::= { pethObjects 4 }
pethNotificationControlTable OBJECT-TYPE
SYNTAX SEQUENCE OF PethNotificationControlEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A table of objects that display and control the
Notification on a PSE device.
Values of all read-write objects in this table are
persistent at restart/reboot."
::= { pethNotificationControl 1 }
pethNotificationControlEntry OBJECT-TYPE
SYNTAX PethNotificationControlEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A set of objects that control the Notification events."
INDEX { pethNotificationControlGroupIndex }
::= { pethNotificationControlTable 1 }
PethNotificationControlEntry ::= SEQUENCE {
pethNotificationControlGroupIndex
Integer32,
pethNotificationControlEnable
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TruthValue
}
pethNotificationControlGroupIndex OBJECT-TYPE
SYNTAX Integer32 (1..2147483647)
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This variable uniquely identifies the group. Group
means box in the stack, module in a rack and the value
1 MUST be used for non-modular devices. Furthermore,
the same value MUST be used in this variable,
pethPsePortGroupIndex, and
pethMainPseGroupIndex to refer to a given box in a
stack or module in a rack. "
::= { pethNotificationControlEntry 1 }
pethNotificationControlEnable OBJECT-TYPE
SYNTAX TruthValue
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"This object controls, on a per-group basis, whether
or not notifications from the agent are enabled. The
value true(1) means that notifications are enabled; the
value false(2) means that they are not."
::= { pethNotificationControlEntry 2 }
--
-- Notifications Section
--
--
pethPsePortOnOffNotification NOTIFICATION-TYPE
OBJECTS { pethPsePortDetectionStatus }
STATUS current
DESCRIPTION
" This Notification indicates if Pse Port is delivering or
not power to the PD. This Notification SHOULD be sent on
every status change except in the searching mode.
At least 500 msec must elapse between notifications
being emitted by the same object instance."
::= { pethNotifications 1 }
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pethMainPowerUsageOnNotification NOTIFICATION-TYPE
OBJECTS { pethMainPseConsumptionPower }
STATUS current
DESCRIPTION
" This Notification indicate PSE Threshold usage
indication is on, the usage power is above the
threshold. At least 500 msec must elapse between
notifications being emitted by the same object
instance."
::= { pethNotifications 2 }
pethMainPowerUsageOffNotification NOTIFICATION-TYPE
OBJECTS { pethMainPseConsumptionPower }
STATUS current
DESCRIPTION
" This Notification indicates PSE Threshold usage indication
off, the usage power is below the threshold.
At least 500 msec must elapse between notifications being
emitted by the same object instance."
::= { pethNotifications 3 }
--
-- Conformance Section
--
pethCompliances OBJECT IDENTIFIER ::= { pethConformance 1 }
pethGroups OBJECT IDENTIFIER ::= { pethConformance 2 }
pethCompliance MODULE-COMPLIANCE
STATUS current
DESCRIPTION
"Describes the requirements for conformance to the
Power Ethernet MIB."
MODULE -- this module
MANDATORY-GROUPS { pethPsePortGroup,
pethPsePortNotificationGroup,
pethNotificationControlGroup
}
GROUP pethMainPseGroup
DESCRIPTION
"The pethMainPseGroup is mandatory for PSE systems
that implement a main power supply."
GROUP pethMainPowerNotificationGroup
DESCRIPTION
"The pethMainPowerNotificationGroup is mandatory for
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PSE systems that implement a main power supply."
::= { pethCompliances 1 }
pethPsePortGroup OBJECT-GROUP
OBJECTS {
pethPsePortAdminEnable,
pethPsePortPowerPairsControlAbility,
pethPsePortPowerPairs,
pethPsePortDetectionStatus,
pethPsePortPowerPriority,
pethPsePortMPSAbsentCounter,
pethPsePortInvalidSignatureCounter,
pethPsePortPowerDeniedCounter,
pethPsePortOverLoadCounter,
pethPsePortShortCounter,
pethPsePortType,
pethPsePortPowerClassifications
}
STATUS current
DESCRIPTION
"PSE Port objects."
::= { pethGroups 1 }
pethMainPseGroup OBJECT-GROUP
OBJECTS {
pethMainPsePower,
pethMainPseOperStatus,
pethMainPseConsumptionPower,
pethMainPseUsageThreshold
}
STATUS current
DESCRIPTION
"Main PSE Objects. "
::= { pethGroups 2 }
pethNotificationControlGroup OBJECT-GROUP
OBJECTS {
pethNotificationControlEnable
}
STATUS current
DESCRIPTION
"Notification Control Objects. "
::= { pethGroups 3 }
pethPsePortNotificationGroup NOTIFICATION-GROUP
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NOTIFICATIONS { pethPsePortOnOffNotification}
STATUS current
DESCRIPTION "Pse Port Notifications."
::= { pethGroups 4 }
pethMainPowerNotificationGroup NOTIFICATION-GROUP
NOTIFICATIONS { pethMainPowerUsageOnNotification,
pethMainPowerUsageOffNotification}
STATUS current
DESCRIPTION "Main PSE Notifications."
::= { pethGroups 5 }
END
6. Acknowledgements
This document is the product of the Ethernet Interfaces
and Hub MIB WG. The authors would like to recognize the
special contributions of C.M. Heard and David Law.
7. Normative References
[RFC2026] Bradner, S., "The Internet Standards Process - Revision
3", BCP 9, RFC 2026, October 1996.
[RFC2578] McCloghrie, K., Perkins, D., Schoenwaelder, J., Case, J.,
Rose, M. and S. Waldbusser, "Structure of Management
Information Version 2 (SMIv2)", STD 58, RFC 2578, April
1999.
[RFC2579] McCloghrie, K., Perkins, D., Schoenwaelder, J., Case, J.,
Rose, M. and S. Waldbusser, "Textual Conventions for
SMIv2", STD 58, RFC 2579, April 1999.
[RFC2580] McCloghrie, K., Perkins, D., Schoenwaelder, J., Case, J.,
Rose, M. and S. Waldbusser, "Conformance Statements for
SMIv2", STD 58, RFC 2580, April 1999.
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119, March 1997.
[RFC2665] Flick, J., and J. Johnson, "Definitions of Managed
Objects for the Ethernet-like Interface Types", RFC
2665, August 1999.
NOTE - This RFC is under revision by the WG, and may be obsolete by
the time of the publication. The RFC editor should replace it with
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the revised version, if available.
[RFC3411] Harrington, D., Presuhn, R. and B. Wijnen, "An
Architecture for Describing Simple Network Management
Protocol (SNMP) Management Frameworks", RFC 3411,
December 2002.
[IEEE-802.3af] IEEE 802.3 Working Group, "Data Terminal Equipment
(DTE)Power via Media Dependent Interface (MDI)", publication
date TBD
NOTE - This normative reference will be replaced with the IEEE 802.3af
Standard as soon as the IEEE will ratify it (expected date - July 2003)
8. Informative References
[RFC3410] Case, J., Mundy, R., Partain, D. and B. Stewart,
"Introduction and Applicability Statements for Internet-
Standard Management Framework", RFC 3410, December 2002
9.Intellectual Property
The IETF takes no position regarding the validity or scope of any
intellectual property or other rights that might be claimed to
pertain to the implementation or use of the technology described in
this document or the extent to which any license under such rights
might or might not be available; neither does it represent that it
has made any effort to identify any such rights. Information on the
IETF's procedures with respect to rights in standards-track and
standards-related documentation can be found in BCP-11. Copies of
claims of rights made available for publication and any assurances of
licenses to be made available, or the result of an attempt made to
obtain a general license or permission for the use of such
proprietary rights by implementors or users of this specification can
be obtained from the IETF Secretariat.
The IETF invites any interested party to bring to its attention any
copyrights, patents or patent applications, or other proprietary
rights which may cover technology that may be required to practice
this standard. Please address the information to the IETF Executive
Director.
10. Security Considerations
There are a number of management objects defined in this MIB module
with a MAX-ACCESS clause of read-write. Such objects may be
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considered sensitive or vulnerable in some network environments.
The support for SET operations in a non-secure environment without
proper protection can have a negative effect on network operations.
Setting the following object to incorrect values can result in
improper operation of the PSE, including the possibility that the
PD does not receive power from the PSE port:
pethPsePortAdminEnable
pethPsePortPowerPairs
pethPsePortPowerPriority
pethPsePortType
Setting the following objects to incorrect values can result in an
excessive number of traps being sent to network management stations:
pethMainPseUsageThreshold
pethNotificationControlEnable
Some of the readable objects in this MIB module (i.e., objects with a
MAX-ACCESS other than not-accessible) may be considered sensitive or
vulnerable in some network environments. These are:
pethPsePortPowerPairsControlAbility
pethPsePortPowerPriority
pethPsePortPowerClassifications
It is thus important to control even GET and/or NOTIFY access to
these objects and possibly to even encrypt their values when sending
them over the network via SNMP.
SNMP versions prior to SNMPv3 did not include adequate security.
Even if the network itself is secure (for example by using IPSec),
even then, 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.
It is RECOMMENDED that implementers consider the security features as
provided by the SNMPv3 framework (see [RFC3410], section 8),
including full support for the SNMPv3 cryptographic mechanisms (for
authentication and privacy).
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
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rights to indeed GET or SET (change/create/delete) them.
11. Authors Addresses
Avi Berger
PowerDsine Inc.
1, Hanagar St., P.O. Box 7220
Hod Hasharon 45421,
Israel
Tel: +972-9-7755100 Ext 307
Fax: +972-9-7755120
E-mail: avib@PowerDsine.com
Dan Romascanu
Avaya
Atidim Technology Park, Bldg. #3
Tel Aviv, 61131
Israel
Tel: +972-3-645-8414
Email: dromasca@avaya.com
A. Full Copyright Statement
Copyright (c) The Internet Society (2003). All Rights Reserved
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TASK FORCE DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING
BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION
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HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
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