Hub MIB Working Group J. Flick
INTERNET DRAFT Hewlett-Packard Company
J. Johnson
RedBack Networks
F. Kastenholz
FTP Software, Inc.
November 1997
Definitions of Managed Objects for
the Ethernet-like Interface Types
<draft-ietf-hubmib-etherif-mib-02.txt>
Status of this Memo
This document is an Internet-Draft. 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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ftp.isi.edu (US West Coast).
Copyright Notice
Copyright (C) The Internet Society (1997). All Rights Reserved.
Abstract
This memo is an extension to the SNMP MIB. It specifies an IAB
standards track protocol for the Internet community, and requests
discussion and suggestions for improvements. The origin of this memo
is from RFC 1650 ''Definitions of Managed Objects for the Ethernet-
like Interface Types using SMIv2.'' This memo extends that
specification by including management information useful for the
management of 100BaseT ethernet interfaces.
Distribution of this memo is unlimited. Please forward comments to
hubmib@hprnd.rose.hp.com.
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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 objects for managing ethernet-like
interfaces.
This memo also includes a MIB module. This MIB module extends the
list of managed objects specified in the earlier version of this MIB:
RFC1650 [11].
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 [13].
2. The SNMP Network Management Framework
The SNMP Network Management Framework consists of several components.
For the purpose of this specification, the applicable components of
the Framework are the SMI and related documents [2, 3, 4], which
define the mechanisms used for describing and naming objects for the
purpose of management.
The Framework permits new objects to be defined for the purpose of
experimentation and evaluation.
2.1. Object Definitions
Managed objects are accessed via a virtual information store, termed
the Management Information Base or MIB. Objects in the MIB are
defined using the subset of Abstract Syntax Notation One (ASN.1) [1]
defined in the SMI [2]. In particular, each object object type is
named by an OBJECT IDENTIFIER, an administratively assigned name.
The object type together with an object instance serves to uniquely
identify a specific instantiation of the object. For human
convenience, we often use a textual string, termed the descriptor, to
refer to the object type.
3. Change Log
This section enumerates changes made to RFC 1650 to produce this
document.
(1) The MODULE-IDENTITY has been updated to reflect the changes
in the MIB.
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(2) A new object, dot3StatsSymbolErrors, has been added.
(3) The definition of the object dot3StatsIndex has been
converted to use the SMIv2 OBJECT-TYPE macro.
(4) A new conformance group, etherStats100MbsGroup, has been
added.
(5) A new compliance statement, ether100MbsCompliance, has
been added.
(6) The Acknowledgements were extended to provide a more
complete history of the origin of this document.
(7) The discussion of ifType has been expanded.
(8) A section on mapping of Interfaces MIB objects has
been added.
(9) A section defining the relationship of this MIB to
the MAU MIB has been added.
(10) A section on the mapping of IEEE 802.3 managed objects
to this MIB and the Interfaces MIB has been added.
(11) Comverted the dot3Tests, dot3Errors, and dot3ChipSets
OIDs to use the OBJECT-IDENTITY macro.
(12) An intellectual property notice and copyright notice
were added, as required by RFC 2026.
4. Overview
Instances of these object types represent attributes of an interface
to an ethernet-like communications medium. At present, ethernet-like
media are identified by the following values of the ifType object in
the Interfaces MIB [12]:
ethernetCsmacd(6)
iso88023Csmacd(7)
starLan(11)
The definitions presented here are based on the IEEE 802.3 Layer
Management Specification [5], as originally interpreted by Frank
Kastenholz then of Interlan in [7]. Implementors of these MIB
objects should note that the IEEE document explicitly describes (in
the form of Pascal pseudocode) when, where, and how various MAC
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attributes are measured. The IEEE document also describes the
effects of MAC actions that may be invoked by manipulating instances
of the MIB objects defined here.
To the extent that some of the attributes defined in [5] are
represented by previously defined objects in the Internet-standard
MIB or in the Interfaces Group Evolution MIB [12], such attributes
are not redundantly represented by objects defined in this memo.
Among the attributes represented by objects defined in other memos
are the number of octets transmitted or received on a particular
interface, the number of frames transmitted or received on a
particular interface, the promiscuous status of an interface, the MAC
address of an interface, and multicast information associated with an
interface.
4.1. Relation to MIB-2
This section applies only when this MIB is used in conjunction with
the "old" (RFC 1213) interface group.
The relationship between an ethernet-like interface and an interface
in the context of the Internet-standard MIB is one-to-one. As such,
the value of an ifIndex object instance can be directly used to
identify corresponding instances of the objects defined herein.
For agents which implement the (now deprecated) ifSpecific object, an
instance of that object that is associated with an ethernet-like
interface has the OBJECT IDENTIFIER value:
dot3 OBJECT IDENTIFER ::= { transmission 7 }
4.2. Relation to the Interfaces MIB
The Interface MIB [12] requires that any MIB which is an adjunct of
the Interface MIB clarify specific areas within the Interface MIB.
These areas were intentionally left vague in the Interface MIB to
avoid over constraining the MIB, thereby precluding management of
certain media-types.
Section 3.3 of [12] enumerates several areas which a media-specific
MIB must clarify. Each of these areas is addressed in a following
subsection. The implementor is referred to [12] in order to
understand the general intent of these areas.
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4.2.1. Layering Model
This MIB does not provide for layering. There are no sublayers.
EDITOR'S NOTE:
One could foresee the development of an 802.2 and enet-transceiver
MIB. They could be higher and lower sublayers, respectively. All
that THIS document should do is allude to the possibilities and urge
the implementor to be aware of the possibility and that they may have
requirements which supersede the requirements in this document.
4.2.2. Virtual Circuits
This medium does not support virtual circuits and this area is not
applicable to this MIB.
4.2.3. ifTestTable
This MIB defines two tests for media which are instrumented with this
MIB; TDR and Loopback. Implementation of these tests is not
required. Many common interface chips do not support one or both of
these tests.
These two tests are provided as a convenience, allowing a common
method to invoke the test.
Standard MIBs do not include objects in which to return the results
of the TDR test. Any needed objects MUST be provided in the vendor
specific MIB.
Note that the ifTestTable is now deprecated. Work is underway to
define a replacement MIB for system and interface testing. It is
expected that the tests defined in this document will be usable in
this replacement MIB.
4.2.4. ifRcvAddressTable
This table contains all IEEE 802.3 addresses, unicast, multicast, and
broadcast, for which this interface will receive packets and forward
them up to a higher layer entity for local consumption. The format
of the address, contained in ifRcvAddressAddress, is the same as for
ifPhysAddress.
In the event that the interface is part of a MAC bridge, this table
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does not include unicast addresses which are accepted for possible
forwarding out some other port. This table is explicitly not
intended to provide a bridge address filtering mechanism.
4.2.5. ifPhysAddress
This object contains the IEEE 802.3 address which is placed in the
source-address field of any Ethernet, Starlan, or IEEE 802.3 frames
that originate at this interface. Usually this will be kept in ROM
on the interface hardware. Some systems may set this address via
software.
In a system where there are several such addresses the designer has a
tougher choice. The address chosen should be the one most likely to
be of use to network management (e.g. the address placed in ARP
responses for systems which are primarily IP systems).
If the designer truly can not chose, use of the factory- provided ROM
address is suggested.
If the address can not be determined, an octet string of zero length
should be returned.
The address is stored in binary in this object. The address is
stored in "canonical" bit order, that is, the Group Bit is positioned
as the low-order bit of the first octet. Thus, the first byte of a
multicast address would have the bit 0x01 set.
4.2.6. ifType
This MIB applies to interfaces which have any of the following ifType
values:
ethernetCsmacd(6)
iso88023Csmacd(7)
starLan(11)
It is RECOMMENDED that all Ethernet-like interfaces use an ifType of
ethernetCsmacd(6) regardless of the speed that the interface is
running or the link-layer encapsulation in use. iso88023Csmacd(7)
and starLan(11) are supported for backwards compatability.
There are two other interface types defined in the IANAifType-MIB for
100 Mbit Ethernet. They are fastEther(62), and fastEtherFX(69).
This document takes the position that an Ethernet is an Ethernet, and
Ethernet interfaces SHOULD always have the same value of ifType.
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Information on the particular flavor of Ethernet that an interface is
running is available from ifSpeed in the Interfaces MIB, and
ifMauType in the 802.3 MAU MIB. An Ethernet-like interface SHOULD
NOT use the fastEther(62) or fastEtherFX(69) ifTypes.
Interfaces with any of the supported ifType values map to the
EtherLike-MIB in the same manner. Which compliance statement an
interface should implement is dependent on the maximum speed
supported on the interface. The EtherLike-MIB etherCompliance
compliance statement applies to all Ethernet-like interfaces whose
maximum supported speed is 10 Mbit/sec or less. There are no
implementation differences. Similarly, the EtherLike-MIB
ether100MbsCompliance compliance statement applies to all Ethernet-
like interfaces whose maximum supported speed of 100Mbit/sec.
An interface that is capable of operating at 100Mbit/sec MUST
implement the ether100MbsCompliance compliance statement, even if it
is currently operating at a lower speed. Counters in the
ether100MbsCompliance compliance statement that only apply to 100
Mbit interfaces would simply not increment when the interface is
operating at a lower speed.
4.2.7. Specific Interface MIB Objects
The following table provides specific implementation guidelines for
applying the interface group objects to ethernet-like media.
Object
ifIndex Each ethernet-like interface is
represented by an ifEntry. The
dot3StatsTable in this MIB module is
indexed by dot3StatsIndex. The interface
identified by a particular value of
dot3StatsIndex is the same interface as
identified by the same value of ifIndex.
ifDescr Refer to [12].
ifType Refer to section 4.2.6.
ifMtu 1500 octets.
ifSpeed The current operational speed of the
interface in bits per second. For
current ethernet-like interfaces, this
will be equal to 1,000,000 (1 million),
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10,000,000 (10 million), or 100,000,000
(100 million). If the interface
implements auto-negotiation,
auto-negotiation is enabled for this
interface, and the interface has not yet
negotiated to an operational speed, this
object SHOULD reflect the maximum speed
supported by the interface. Note that
this object MUST NOT indicate a doubled
value when operating in full-duplex
mode. It MUST indicate the correct
line speed regardless of the current
duplex mode. The correct object to use
to determine the duplex mode of the
interface is the ifMauType object in the
802.3 MAU MIB.
ifPhysAddress Refer to section 4.2.5.
ifAdminStatus Write access is not required. Support
for 'testing' is not required.
ifOperStatus The operational state of the interface.
Support for 'testing' is not required.
The value 'dormant' has no meaning for
an ethernet-like interface.
ifLastChange Refer to [12].
ifInOctets The number of octets in valid MAC frames
received on this interface, including
the MAC header and FCS.
ifInUcastPkts Refer to [12].
ifInDiscards Refer to [12].
ifInErrors The sum for this interface of
dot3StatsAlignmentErrors,
dot3StatsFCSErrors,
dot3StatsFrameTooLongs,
dot3StatsInternalMacReceiveErrors and
dot3StatsSymbolErrors.
ifInUnknownProtos Refer to [12].
ifOutOctets The number of octets transmitted in
valid MAC frames on this interface,
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including the MAC header and FCS.
ifOutUcastPkts Refer to [12].
ifOutDiscards Refer to [12].
ifOutErrors The sum for this interface of:
dot3StatsSQETestErrors,
dot3StatsLateCollisions,
dot3StatsExcessiveCollisions,
dot3StatsInternalMacTransmitErrors and
dot3StatsCarrierSenseErrors.
ifName Locally-significant textual name for the
interface (e.g. lan0).
ifInMulticastPkts Refer to [12].
ifInBroadcastPkts Refer to [12].
ifOutMulticastPkts Refer to [12].
ifOutBroadcastPkts Refer to [12].
ifHCInOctets 64-bit versions of counters. Required
ifHCOutOctets for ethernet-like interfaces that are
capable of operating at 20Mbit/sec or
faster, even if the interface is
currently operating at less than
20Mbit/sec.
ifHCInUcastPkts 64-bit versions of packet counters.
ifHCInMulticastPkts Support for these counters is not
ifHCInBroadcastPkts required for the interface types
ifHCOutUcastPkts supported by this MIB. They are only
ifHCOutMulticastPkts required for interfaces capable of
ifHCOutBroadcastPkts operating at 640Mbit/sec or faster.
Note that a future revision of this
document may support faster interfaces,
and therefore may require support for
these counters.
ifLinkUpDownTrapEnable Refer to [12]. Default is 'enabled'
ifHighSpeed The current operational speed of the
interface in millions of bits per
second. For current ethernet-like
interfaces, this will be equal to 1, 10,
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or 100. If the interface implements
auto-negotiation, auto-negotiation is
enabled for this interface, and the
interface has not yet negotiated to an
operational speed, this object SHOULD
reflect the maximum speed supported by
the interface. Note that this object
MUST NOT indicate a doubled value when
operating in full-duplex mode. It MUST
indicate the correct line speed
regardless of the current duplex mode.
The correct object to use to determine
the duplex mode of the interface is the
ifMauType object in the 802.3 MAU MIB.
ifPromiscuousMode Refer to [12].
ifConnectorPresent This will normally be 'true'.
ifAlias Refer to [12].
ifCounterDiscontinuityTime Refer to [12].
ifStackHigherLayer Refer to section 4.2.1.
ifStackLowerLayer
ifStackStatus
ifRcvAddressAddress Refer to section 4.2.4.
ifRcvAddressStatus
ifRcvAddressType
4.3. Relation to the 802.3 MAU MIB
Support for the mauModIfCompl compliance statement of the MAU-MIB
[14] is REQUIRED for Ethernet-like interfaces. This MIB is needed in
order to allow applications to determine the current MAU type in use
by the interface. The MAU type indicates not only the media type in
use, but also indicates whether the interface is operating in half-
duplex or full-duplex mode. Implementing this MIB module without
implementing the MAU-MIB would leave applications with no standard
way to determine the duplex mode of the interface.
4.4. Mapping of IEEE 802.3 Managed Objects
IEEE 802.3 Managed Object Corresponding SNMP Object
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oMacEntity
.aMACID dot3StatsIndex or
IF-MIB - ifIndex
.aFramesTransmittedOK IF-MIB - ifOutUCastPkts +
ifOutMulticastPkts +
ifOutBroadcastPkts
.aSingleCollisionFrames dot3StatsSingleCollisionFrames
.aMultipleCollisionFrames dot3StatsMultipleCollisionFrames
.aFramesReceivedOK IF-MIB - ifInUcastPkts +
ifInMulticastPkts +
ifInBroadcastPkts
.aFrameCheckSequenceErrors dot3StatsFCSErrors
.aAlignmentErrors dot3StatsAlignmentErrors
.aOctetsTransmittedOK IF-MIB - ifOutOctets
.aFramesWithDeferredXmissions dot3StatsDeferredTransmissions
.aLateCollisions dot3StatsLateCollisions
.aFramesAbortedDueToXSColls dot3StatsExcessiveCollisions
.aFramesLostDueToIntMACXmitError dot3StatsInternalMacTransmitErrors
.aCarrierSenseErrors dot3StatsCarrierSenseErrors
.aOctetsReceivedOK IF-MIB - ifInOctets
.aFramesLostDueToIntMACRcvError dot3StatsInternalMacReceiveErrors
.aPromiscuousStatus IF-MIB - ifPromiscuousMode
.aReadMulticastAddressList IF-MIB - ifRcvAddressTable
.aMulticastFramesXmittedOK IF-MIB - ifOutMulticastPkts
.aBroadcastFramesXmittedOK IF-MIB - ifOutBroadcastPkts
.aMulticastFramesReceivedOK IF-MIB - ifInMulticastPkts
.aBroadcastFramesReceivedOK IF-MIB - ifInBroadcastPkts
.aFrameTooLongErrors dot3StatsFrameTooLongs
.aReadWriteMACAddress IF-MIB - ifPhysAddress
.aCollisionFrames dot3CollFrequencies
.acAddGroupAddress IF-MIB - ifRcvAddressTable
.acDeleteGroupAddress IF-MIB - ifRcvAddressTable
.acExecuteSelfTest dot3TestLoopBack
oPHYEntity
.aSQETestErrors dot3StatsSQETestErrors
.aSymbolErrorDuringCarrier dot3StatsSymbolErrors
The following IEEE 802.3 managed objects have been removed from this
MIB module as a result of implementation feedback:
oMacEntity
.aFramesWithExcessiveDeferral
.aInRangeLengthErrors
.aOutOfRangeLengthField
.aMACEnableStatus
.aTransmitEnableStatus
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.aMulticastReceiveStatus
.acInitializeMAC
Please see [15] for the detailed reasoning on why these objects were
removed.
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5. Definitions
EtherLike-MIB DEFINITIONS ::= BEGIN
IMPORTS
MODULE-IDENTITY, OBJECT-TYPE, OBJECT-IDENTITY,
Counter32, mib-2, transmission
FROM SNMPv2-SMI
MODULE-COMPLIANCE, OBJECT-GROUP
FROM SNMPv2-CONF
ifIndex, InterfaceIndex
FROM IF-MIB;
etherMIB MODULE-IDENTITY
LAST-UPDATED "9711102157Z" -- November 10, 1997
ORGANIZATION "IETF 802.3 Hub MIB Working Group"
CONTACT-INFO
"WG E-mail: hubmib@hprnd.rose.hp.com
Chair: Dan Romascanu
Postal: Madge Networks
Atidum Technology Park, Bldg. 3
Tel Aviv 61131
Israel
Tel: +972 3 645 8414
E-mail: dromasca@madge.com
Editor: John Flick
Postal: Hewlett-Packard Company
8000 Foothills Blvd. M/S 5556
Roseville, CA 95747-5556
USA
Tel: +1 916 785 4018
Fax: +1 916 785 3583
E-mail: johnf@hprnd.rose.hp.com
Editor: Jeffrey Johnson
Postal: RedBack Networks
2570 North First Street, Suite 410
San Jose, CA, 95131
USA
Tel: +1 408 571 2699
Fax: +1 408 571 2698
E-Mail: jeff@redbacknetworks.com"
DESCRIPTION "The MIB module to describe generic objects for
Ethernet-like network interfaces. This MIB is an
updated version of the Ethernet-like MIB in RFC
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1650."
REVISION "9711102157Z"
DESCRIPTION "Updated to include support for 100 Mb/sec
interfaces."
REVISION "9402030400Z"
DESCRIPTION "Version published as RFC 1650."
::= { mib-2 35 }
etherMIBObjects OBJECT IDENTIFIER ::= { etherMIB 1 }
dot3 OBJECT IDENTIFIER ::= { transmission 7 }
-- the Ethernet-like Statistics group
dot3StatsTable OBJECT-TYPE
SYNTAX SEQUENCE OF Dot3StatsEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION "Statistics for a collection of ethernet-like
interfaces attached to a particular system."
::= { dot3 2 }
dot3StatsEntry OBJECT-TYPE
SYNTAX Dot3StatsEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION "Statistics for a particular interface to an
ethernet-like medium."
INDEX { dot3StatsIndex }
::= { dot3StatsTable 1 }
Dot3StatsEntry ::=
SEQUENCE {
dot3StatsIndex InterfaceIndex,
dot3StatsAlignmentErrors Counter32,
dot3StatsFCSErrors Counter32,
dot3StatsSingleCollisionFrames Counter32,
dot3StatsMultipleCollisionFrames Counter32,
dot3StatsSQETestErrors Counter32,
dot3StatsDeferredTransmissions Counter32,
dot3StatsLateCollisions Counter32,
dot3StatsExcessiveCollisions Counter32,
dot3StatsInternalMacTransmitErrors Counter32,
dot3StatsCarrierSenseErrors Counter32,
dot3StatsFrameTooLongs Counter32,
dot3StatsInternalMacReceiveErrors Counter32,
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dot3StatsEtherChipSet OBJECT IDENTIFIER,
dot3StatsSymbolErrors Counter32
}
dot3StatsIndex OBJECT-TYPE
SYNTAX InterfaceIndex
MAX-ACCESS read-only
STATUS current
DESCRIPTION "An index value that uniquely identifies an
interface to an ethernet-like medium. The
interface identified by a particular value of
this index is the same interface as identified
by the same value of ifIndex."
::= { dot3StatsEntry 1 }
dot3StatsAlignmentErrors OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION "A count of frames received on a particular
interface that are not an integral number of
octets in length and do not pass the FCS check.
The count represented by an instance of this
object is incremented when the alignmentError
status is returned by the MAC service to the
LLC (or other MAC user). Received frames for
which multiple error conditions obtain are,
according to the conventions of IEEE 802.3
Layer Management, counted exclusively according
to the error status presented to the LLC."
REFERENCE "IEEE 802.3 Layer Management"
::= { dot3StatsEntry 2 }
dot3StatsFCSErrors OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION "A count of frames received on a particular
interface that are an integral number of octets
in length but do not pass the FCS check.
The count represented by an instance of this
object is incremented when the frameCheckError
status is returned by the MAC service to the
LLC (or other MAC user). Received frames for
which multiple error conditions obtain are,
according to the conventions of IEEE 802.3
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Layer Management, counted exclusively according
to the error status presented to the LLC."
REFERENCE "IEEE 802.3 Layer Management"
::= { dot3StatsEntry 3 }
dot3StatsSingleCollisionFrames OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION "A count of successfully transmitted frames on
a particular interface for which transmission
is inhibited by exactly one collision.
A frame that is counted by an instance of this
object is also counted by the corresponding
instance of either the ifOutUcastPkts,
ifOutMulticastPkts, or ifOutBroadcastPkts,
and is not counted by the corresponding
instance of the dot3StatsMultipleCollisionFrames
object."
REFERENCE "IEEE 802.3 Layer Management"
::= { dot3StatsEntry 4 }
dot3StatsMultipleCollisionFrames OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION "A count of successfully transmitted frames on
a particular interface for which transmission
is inhibited by more than one collision.
A frame that is counted by an instance of this
object is also counted by the corresponding
instance of either the ifOutUcastPkts,
ifOutMulticastPkts, or ifOutBroadcastPkts,
and is not counted by the corresponding
instance of the dot3StatsSingleCollisionFrames
object."
REFERENCE "IEEE 802.3 Layer Management"
::= { dot3StatsEntry 5 }
dot3StatsSQETestErrors OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION "A count of times that the SQE TEST ERROR
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message is generated by the PLS sublayer for a
particular interface. The SQE TEST ERROR
message is defined in section 7.2.2.2.4 of
ANSI/IEEE 802.3-1985 and its generation is
described in section 7.2.4.6 of the same
document."
REFERENCE "ANSI/IEEE Std 802.3-1985 Carrier Sense
Multiple Access with Collision Detection Access
Method and Physical Layer Specifications"
::= { dot3StatsEntry 6 }
dot3StatsDeferredTransmissions OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION "A count of frames for which the first
transmission attempt on a particular interface
is delayed because the medium is busy.
The count represented by an instance of this
object does not include frames involved in
collisions."
REFERENCE "IEEE 802.3 Layer Management"
::= { dot3StatsEntry 7 }
dot3StatsLateCollisions OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION "The number of times that a collision is
detected on a particular interface later than
512 bit-times into the transmission of a
packet.
Five hundred and twelve bit-times corresponds
to 51.2 microseconds on a 10 Mbit/s system. A
(late) collision included in a count
represented by an instance of this object is
also considered as a (generic) collision for
purposes of other collision-related
statistics."
REFERENCE "IEEE 802.3 Layer Management"
::= { dot3StatsEntry 8 }
dot3StatsExcessiveCollisions OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
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DESCRIPTION "A count of frames for which transmission on a
particular interface fails due to excessive
collisions."
REFERENCE "IEEE 802.3 Layer Management"
::= { dot3StatsEntry 9 }
dot3StatsInternalMacTransmitErrors OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION "A count of frames for which transmission on a
particular interface fails due to an internal
MAC sublayer transmit error. A frame is only
counted by an instance of this object if it is
not counted by the corresponding instance of
either the dot3StatsLateCollisions object, the
dot3StatsExcessiveCollisions object, or the
dot3StatsCarrierSenseErrors object.
The precise meaning of the count represented by
an instance of this object is implementation-
specific. In particular, an instance of this
object may represent a count of transmission
errors on a particular interface that are not
otherwise counted."
REFERENCE "IEEE 802.3 Layer Management"
::= { dot3StatsEntry 10 }
dot3StatsCarrierSenseErrors OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION "The number of times that the carrier sense
condition was lost or never asserted when
attempting to transmit a frame on a particular
interface.
The count represented by an instance of this
object is incremented at most once per
transmission attempt, even if the carrier sense
condition fluctuates during a transmission
attempt."
REFERENCE "IEEE 802.3 Layer Management"
::= { dot3StatsEntry 11 }
-- { dot3StatsEntry 12 } is not assigned
dot3StatsFrameTooLongs OBJECT-TYPE
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SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION "A count of frames received on a particular
interface that exceed the maximum permitted
frame size.
The count represented by an instance of this
object is incremented when the frameTooLong
status is returned by the MAC service to the
LLC (or other MAC user). Received frames for
which multiple error conditions obtain are,
according to the conventions of IEEE 802.3
Layer Management, counted exclusively according
to the error status presented to the LLC."
REFERENCE "IEEE 802.3 Layer Management"
::= { dot3StatsEntry 13 }
-- { dot3StatsEntry 14 } is not assigned
-- { dot3StatsEntry 15 } is not assigned
dot3StatsInternalMacReceiveErrors OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION "A count of frames for which reception on a
particular interface fails due to an internal
MAC sublayer receive error. A frame is only
counted by an instance of this object if it is
not counted by the corresponding instance of
either the dot3StatsFrameTooLongs object, the
dot3StatsAlignmentErrors object, or the
dot3StatsFCSErrors object.
The precise meaning of the count represented by
an instance of this object is implementation-
specific. In particular, an instance of this
object may represent a count of receive errors
on a particular interface that are not
otherwise counted."
REFERENCE "IEEE 802.3 Layer Management"
::= { dot3StatsEntry 16 }
dot3StatsEtherChipSet OBJECT-TYPE
SYNTAX OBJECT IDENTIFIER
MAX-ACCESS read-only
STATUS current
DESCRIPTION "This object contains an OBJECT IDENTIFIER
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which identifies the chipset used to
realize the interface. Ethernet-like
interfaces are typically built out of
several different chips. The MIB implementor
is presented with a decision of which chip
to identify via this object. The implementor
should identify the chip which is usually
called the Medium Access Control chip.
If no such chip is easily identifiable,
the implementor should identify the chip
which actually gathers the transmit
and receive statistics and error
indications. This would allow a
manager station to correlate the
statistics and the chip generating
them, giving it the ability to take
into account any known anomalies
in the chip."
::= { dot3StatsEntry 17 }
dot3StatsSymbolErrors OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION "The number of times there was an invalid data
symbol when a valid carrier was present on a
particular interface.
The count represented by an instance of this
object is incremented at most once per carrier
event, even if multiple symbol errors occur
during the carrier event."
REFERENCE "IEEE 802.3u-1995 10 & 100 Mb/s Management"
::= { dot3StatsEntry 18 }
-- the Ethernet-like Collision Statistics group
-- Implementation of this group is optional; it is appropriate
-- for all systems which have the necessary metering
dot3CollTable OBJECT-TYPE
SYNTAX SEQUENCE OF Dot3CollEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION "A collection of collision histograms for a
particular set of interfaces."
::= { dot3 5 }
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dot3CollEntry OBJECT-TYPE
SYNTAX Dot3CollEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION "A cell in the histogram of per-frame
collisions for a particular interface. An
instance of this object represents the
frequency of individual MAC frames for which
the transmission (successful or otherwise) on a
particular interface is accompanied by a
particular number of media collisions."
INDEX { ifIndex, dot3CollCount }
::= { dot3CollTable 1 }
Dot3CollEntry ::=
SEQUENCE {
dot3CollCount INTEGER,
dot3CollFrequencies Counter32
}
-- { dot3CollEntry 1 } is no longer in use
dot3CollCount OBJECT-TYPE
SYNTAX INTEGER (1..16)
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION "The number of per-frame media collisions for
which a particular collision histogram cell
represents the frequency on a particular
interface."
::= { dot3CollEntry 2 }
dot3CollFrequencies OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION "A count of individual MAC frames for which the
transmission (successful or otherwise) on a
particular interface occurs after the
frame has experienced exactly the number
of collisions in the associated
dot3CollCount object.
For example, a frame which is transmitted
on interface 77 after experiencing
exactly 4 collisions would be indicated
by incrementing only dot3CollFrequencies.77.4.
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No other instance of dot3CollFrequencies would
be incremented in this example."
::= { dot3CollEntry 3 }
-- 802.3 Tests
dot3Tests OBJECT IDENTIFIER ::= { dot3 6 }
dot3Errors OBJECT IDENTIFIER ::= { dot3 7 }
-- TDR Test
dot3TestTdr OBJECT-IDENTITY
STATUS current
DESCRIPTION "The Time-Domain Reflectometry (TDR) test is
specific to ethernet-like interfaces of type
10Base5 and 10Base2. The TDR value may be
useful in determining the approximate distance
to a cable fault. It is advisable to repeat
this test to check for a consistent resulting
TDR value, to verify that there is a fault.
A TDR test returns as its result the time
interval, measured in 10 MHz ticks or 100 nsec
units, between the start of TDR test
transmission and the subsequent detection of a
collision or deassertion of carrier. On
successful completion of a TDR test, the result
is stored as the value of an appropriate
instance of an appropriate vendor specific MIB
object, and the OBJECT IDENTIFIER of that
instance is stored in the appropriate instance
of the appropriate test result code object
(thereby indicating where the result has been
stored).
::= { dot3Tests 1 }
-- Loopback Test
dot3TestLoopBack OBJECT-IDENTITY
STATUS current
DESCRIPTION "This test configures the MAC chip and executes
an internal loopback test of memory, data paths,
and the MAC chip logic. This loopback test can
only be executed if the interface is offline.
Once the test has completed, the MAC chip should
be reinitialized for network operation, but it
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should remain offline.
If an error occurs during a test, the
appropriate test result object will be set
to indicate a failure. The two OBJECT
IDENTIFIER values dot3ErrorInitError and
dot3ErrorLoopbackError may be used to provided
more information as values for an appropriate
test result code object."
::= { dot3Tests 2 }
dot3ErrorInitError OBJECT-IDENTITY
STATUS current
DESCRIPTION "Couldn't initialize MAC chip for test."
::= { dot3Errors 1 }
dot3ErrorLoopbackError OBJECT-IDENTITY
STATUS current
DESCRIPTION "Expected data not received (or not received
correctly) in loopback test."
::= { dot3Errors 2 }
-- 802.3 Hardware Chipsets
-- The object dot3StatsEtherChipSet is provided to
-- identify the MAC hardware used to communicate on an
-- interface. The following hardware chipsets are
-- provided:
dot3ChipSets OBJECT IDENTIFIER ::= { dot3 8 }
dot3ChipSetAMD OBJECT IDENTIFIER ::= { dot3ChipSets 1 }
dot3ChipSetAMD7990 OBJECT-IDENTITY
STATUS current
DESCRIPTION "The authoritative identifier for the Advanced
Micro Devices Am7990 Local Area Network
Controller for Ethernet (LANCE)."
::= { dot3ChipSetAMD 1 }
dot3ChipSetAMD79900 OBJECT-IDENTITY
STATUS current
DESCRIPTION "The authoritative identifier for the Advanced
Micro Devices Am79900 chip."
::= { dot3ChipSetAMD 2 }
dot3ChipSetAMD79C940 OBJECT-IDENTITY
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STATUS current
DESCRIPTION "The authoritative identifier for the Advanced
Micro Devices am79C940 Media Access Controller
for Ethernet (MACE)."
::= { dot3ChipSetAMD 3 }
dot3ChipSetIntel OBJECT IDENTIFIER ::= { dot3ChipSets 2 }
dot3ChipSetIntel82586 OBJECT-IDENTITY
STATUS current
DESCRIPTION "The authoritative identifier for the Intel
82586 IEEE 802.3 Ethernet LAN Coprocessor."
::= { dot3ChipSetIntel 1 }
dot3ChipSetIntel82596 OBJECT-IDENTITY
STATUS current
DESCRIPTION "The authoritative identifier for the Intel
82596 High-Performance 32-Bit Local Area Network
Coprocessor."
::= { dot3ChipSetIntel 2 }
dot3ChipSetSeeq OBJECT IDENTIFIER ::= { dot3ChipSets 3 }
dot3ChipSetSeeq8003 OBJECT-IDENTITY
STATUS current
DESCRIPTION "The authoritative identifier for the SEEQ
8003 chip set."
::= { dot3ChipSetSeeq 1 }
dot3ChipSetNational OBJECT IDENTIFIER ::= { dot3ChipSets 4 }
dot3ChipSetNational8390 OBJECT-IDENTITY
STATUS current
DESCRIPTION "The authoritative identifier for the National
Semiconductor DP8390 Network Interface
Controller."
::= { dot3ChipSetNational 1 }
dot3ChipSetNationalSonic OBJECT-IDENTITY
STATUS current
DESCRIPTION "The authoritative identifier for the National
Semiconductor DP83932 Systems-Oriented Network
Interface Controller (SONIC)."
::= { dot3ChipSetNational 2 }
dot3ChipSetFujitsu OBJECT IDENTIFIER ::= { dot3ChipSets 5 }
dot3ChipSetFujitsu86950 OBJECT-IDENTITY
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STATUS current
DESCRIPTION "The authoritative identifier for the Fujitsu
86950 chip."
::= { dot3ChipSetFujitsu 1 }
dot3ChipSetDigital OBJECT IDENTIFIER ::= { dot3ChipSets 6 }
dot3ChipSetDigitalDC21040 OBJECT-IDENTITY
STATUS current
DESCRIPTION "The authoritative identifier for the Digital
DC21040 chip."
::= { dot3ChipSetDigital 1 }
-- For those chipsets not represented above, OBJECT IDENTIFIER
-- assignment is required in other documentation, e.g.,
-- assignment within that part of the registration tree
-- deletaged to individual enterprises (see RFC1155).
-- conformance information
etherConformance OBJECT IDENTIFIER ::= { etherMIB 2 }
etherGroups OBJECT IDENTIFIER ::= { etherConformance 1 }
etherCompliances OBJECT IDENTIFIER ::= { etherConformance 2 }
-- compliance statements
etherCompliance MODULE-COMPLIANCE
STATUS current
DESCRIPTION "The compliance statement for managed network
entities which have ethernet-like network
interfaces."
MODULE -- this module
MANDATORY-GROUPS { etherStatsGroup }
GROUP etherCollisionTableGroup
DESCRIPTION "This group is optional. It is appropriate
for all systems which have the necessary
metering Implementation in such systems is
highly recommended."
::= { etherCompliances 1 }
ether100MbsCompliance MODULE-COMPLIANCE
STATUS current
DESCRIPTION "The compliance statement for managed network
entities which have 100 Mb/sec ethernet-like
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network interfaces."
MODULE -- this module
MANDATORY-GROUPS { etherStats100MbsGroup }
GROUP etherCollisionTableGroup
DESCRIPTION "This group is optional. It is appropriate
for all systems which have the necessary
metering Implementation in such systems is
highly recommended."
::= { etherCompliances 2 }
-- units of conformance
etherStatsGroup OBJECT-GROUP
OBJECTS { dot3StatsIndex,
dot3StatsAlignmentErrors,
dot3StatsFCSErrors,
dot3StatsSingleCollisionFrames,
dot3StatsMultipleCollisionFrames,
dot3StatsSQETestErrors,
dot3StatsDeferredTransmissions,
dot3StatsLateCollisions,
dot3StatsExcessiveCollisions,
dot3StatsInternalMacTransmitErrors,
dot3StatsCarrierSenseErrors,
dot3StatsFrameTooLongs,
dot3StatsInternalMacReceiveErrors,
dot3StatsEtherChipSet
}
STATUS current
DESCRIPTION "A collection of objects providing information
applicable to all ethernet-like network
interfaces."
::= { etherGroups 1 }
etherCollisionTableGroup OBJECT-GROUP
OBJECTS { dot3CollFrequencies
}
STATUS current
DESCRIPTION "A collection of objects providing a histogram
of packets successfully transmitted after
experiencing exactly N collisions."
::= { etherGroups 2 }
etherStats100MbsGroup OBJECT-GROUP
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OBJECTS { dot3StatsIndex,
dot3StatsAlignmentErrors,
dot3StatsFCSErrors,
dot3StatsSingleCollisionFrames,
dot3StatsMultipleCollisionFrames,
dot3StatsDeferredTransmissions,
dot3StatsLateCollisions,
dot3StatsExcessiveCollisions,
dot3StatsInternalMacTransmitErrors,
dot3StatsCarrierSenseErrors,
dot3StatsFrameTooLongs,
dot3StatsInternalMacReceiveErrors,
dot3StatsEtherChipSet,
dot3StatsSymbolErrors
}
STATUS current
DESCRIPTION "A collection of objects providing information
applicable to 100 Mb/sec ethernet-like network
interfaces."
::= { etherGroups 3 }
END
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6. 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.
7. Acknowledgements
This document was produced by the 802.3 Hub MIB Working Group.
This document is almost completely based on both the Standard
Ethernet MIB, RFC 1623 [10], and the Proposed Standard Ethernet MIB
using the SNMPv2 SMI, RFC 1650 [11], both of which were edited by
Frank Kastenholz of FTP Software and produced by the Ethernet MIB
Working Group. This document extends those documents by providing
support for 100 Mb/sec ethernet interfaces as outlined in [6].
RFC 1623 and RFC 1650, in turn, are based on the Draft Standard
Ethernet MIB, RFC 1398 [9], also edited by Frank Kastenholz and
produced by the Ethernet MIB Working Group.
RFC 1398, in turn, is based on the Proposed Standard Ethernet MIB,
RFC 1284 [8], which was edited by John Cook of Chipcom and produced
by the Transmission MIB Working Group. The Ethernet MIB Working
Group gathered implementation experience of the variables specified
in RFC 1284 and used that information to develop this revised MIB.
RFC 1284, in turn, is based on a document written by Frank
Kastenholz, then of Interlan, entitled IEEE 802.3 Layer Management
Draft M compatible MIB for TCP/IP Networks [7]. This document has
been modestly reworked, initially by the SNMP Working Group, and then
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by the Transmission Working Group, to reflect the current conventions
for defining objects for MIB interfaces. James Davin, of the MIT
Laboratory for Computer Science, and Keith McCloghrie of Hughes LAN
Systems, contributed to later drafts of this memo. Marshall Rose of
Performance Systems International, Inc. converted the document into
its current concise format. Anil Rijsinghani of DEC contributed text
that more adequately describes the TDR test. Thanks to Frank
Kastenholz of Interlan and Louis Steinberg of IBM for their
experimentation.
8. References
[1] Information processing systems - Open Systems Interconnection -
Specification of Abstract Syntax Notation One (ASN.1),
International Organization for Standardization, International
Standard 8824, December 1987.
[2] SNMPv2 Working Group, Case, J., McCloghrie, K., Rose, M., and
S. Waldbusser, "Structure of Management Information for Version
2 of the Simple Network Management Protocol (SNMPv2)", RFC 1902,
January 1996.
[3] SNMPv2 Working Group, Case, J., McCloghrie, K., Rose, M., and
S. Waldbusser, "Textual Conventions for Version 2 of the Simple
Network Management Protocol (SNMPv2)", RFC 1903, January 1996.
[4] SNMPv2 Working Group, Case, J., McCloghrie, K., Rose, M., and
S. Waldbusser, "Conformance Statements for Version 2 of the
Simple Network Management Protocol (SNMPv2)", RFC 1904,
January 1996.
[5] IEEE, IEEE 802.3 Layer Management, November 1988.
[6] IEEE, IEEE 802.3u-1995, "10 & 100 Mb/s Management," Section 30,
Supplement to IEEE Std 802.3, October 26, 1995.
[7] Kastenholz, F., "IEEE 802.3 Layer Management Draft compatible
MIB for TCP/IP Networks", electronic mail message to mib-
wg@nnsc.nsf.net, 9 June 1989.
[8] Cook, J., "Definitions of Managed Objects for Ethernet-Like
Interface Types", RFC 1284, Chipcom Corporation, December 1991.
[9] Kastenholz, F., "Definitions of Managed Objects for the
Ethernet-like Interface Types", RFC 1398, FTP Software, Inc.,
January 1993.
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[10] Kastenholz, F., "Definitions of Managed Objects for the
Ethernet-like Interface Types", RFC 1623, FTP Software, Inc.,
May 1994.
[11] Kastenholz, F., "Definitions of Managed Objects for the
Ethernet-like Interface Types using SMIv2", RFC 1650,
FTP Software, Inc., August 1994.
[12] McCloghrie, K., and F. Kastenholz, "Evolution of the Interfaces
Group of MIB-II", RFC 1573, Hughes LAN Systems, FTP Software,
January 1994.
[13] Bradner, S., "Key words for use in RFCs to Indicate
Requirements Levels", BCP 14, RFC 2119, March 1997.
[14] deGraaf, K., Romascanu, D., McMaster, D., McCloghrie, K., and
S. Roberts, "Definitions of Managed Objects for IEEE 802.3
Medium Attachment Units (MAUs) using SMIv2", RFCXXXX,
3Com Corporation, Madge Networks (Israel) Ltd., Cisco Systems
Inc., Cisco Systems Inc., Farallon Computing Inc., October 1997.
[15] Kastenholz, F., "Implementation Notes and Experience for The
Internet Ethernet MIB", RFC 1369, FTP Software, October 1992.
9. Security Considerations
Certain management information defined in this MIB may be considered
sensitive in some network environments. Therefore, authentication of
received SNMP requests and controlled access to management
information should be employed in such environments. The method for
this authentication is a function of the SNMP Administrative
Framework, and has not been expanded by this MIB.
10. Author's Addresses
John Flick
Hewlett-Packard Company
8000 Foothills Blvd. M/S 5556
Roseville, CA 95747-5556
Phone: +1 916 785 4018
Email: johnf@hprnd.rose.hp.com
Jeffrey Johnson
RedBack Networks
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2570 North First Street, Suite 410
San Jose, CA, 95131, USA
Phone: +1 408 571 2699
EMail: jeff@redbacknetworks.com
Frank Kastenholz
FTP Software, Inc.
2 High Street
North Andover, Mass, USA 01845
Phone: +1 508 685 4000
EMail: kasten@ftp.com
11. Full Copyright Statement
This document and translations of it may be copied and furnished to
others, and derivative works that comment on or otherwise explain it
or assist in its implementation may be prepared, copied, published
and distributed, in whole or in part, without restriction of any
kind, provided that the above copyright notice and this paragraph are
included on all such copies and derivative works. However, this
document itself may not be modified in any way, such as by removing
the copyright notice or references to the Internet Society or other
Internet organizations, except as needed for the purpose of
developing Internet standards in which case the procedures for
copyrights defined in the Internet Standards process must be
followed, or as required to translate it into languages other than
English.
The limited permissions granted above are perpetual and will not be
revoked by the Internet Society or its successors or assigns.
This document and the information contained herein is provided on an
"AS IS" basis and THE INTERNET SOCIETY AND THE INTERNET ENGINEERING
TASK FORCE DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING
BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION
HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
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Table of Contents
1. Introduction ................................................ 2
2. The SNMP Network Management Framework ...................... 2
2.1. Object Definitions ....................................... 2
3. Change Log ................................................. 2
4. Overview ................................................... 3
4.1. Relation to MIB-2 ........................................ 4
4.2. Relation to the Interfaces MIB ........................... 4
4.2.1. Layering Model ......................................... 5
4.2.2. Virtual Circuits ....................................... 5
4.2.3. ifTestTable ............................................ 5
4.2.4. ifRcvAddressTable ...................................... 5
4.2.5. ifPhysAddress .......................................... 6
4.2.6. ifType ................................................. 6
4.2.7. Specific Interface MIB Objects ......................... 7
4.3. Relation to the 802.3 MAU MIB ............................ 10
4.4. Mapping of IEEE 802.3 Managed Objects .................... 10
5. Definitions ................................................ 13
6. Intellectual Property ...................................... 28
7. Acknowledgements ........................................... 28
8. References ................................................. 29
9. Security Considerations .................................... 30
10. Author's Addresses ........................................ 30
11. Full Copyright Statement .................................. 31
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