RFC3635

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Network Working Group J. Flick Request for Comments: 3635 Hewlett-Packard Company Obsoletes: 2665 September 2003 Category: Standards Track

               Definitions of Managed Objects for
               the Ethernet-like Interface Types

Status of this Memo

This document specifies an Internet standards track protocol for the Internet community, and requests discussion and suggestions for improvements. Please refer to the current edition of the "Internet Official Protocol Standards" (STD 1) for the standardization state and status of this protocol. Distribution of this memo is unlimited.

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. In particular, it defines objects for managing Ethernet-like interfaces. This memo obsoletes RFC 2665. It updates that specification by including management information useful for the management of 10 Gigabit per second (Gb/s) Ethernet interfaces.

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 updates the list of managed objects specified in the earlier version of this MIB, module, RFC 2665 RFC2665.

Ethernet technology, as defined by the 802.3 Working Group of the IEEE, continues to evolve, with scalable increases in speed, new types of cabling and interfaces, and new features. This evolution may require changes in the managed objects in order to reflect this new functionality. This document, as with other documents issued by this working group, reflects a certain stage in the evolution of Ethernet technology. In the future, this document might be revised, or new documents might be issued by the Ethernet Interfaces and Hub MIB Working Group, in order to reflect the evolution of Ethernet technology.

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.

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.

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 value ethernetCsmacd(6) of the ifType object in the Interfaces MIB RFC2863. Some older implementations may return the values iso88023Csmacd(7) or starLan(11) for ifType for ethernet-like media.

The definitions presented here are based on Section 30, "10 Mb/s, 100 Mb/s 1000 Mb/s and 10 Gb/s Management", and Annex 30A, "GDMO Specification for 802.3 managed object classes" of IEEE Std. 802.3, 2002 Edition [IEEE802.3], amended by IEEE Std. 802.3ae-2002 [IEEE802.3ae], as originally interpreted by Frank Kastenholz, then of Interlan in [KASTEN]. Implementors of these MIB objects should note that IEEE Std. 802.3 [IEEE802.3] explicitly describes (in the form of Pascal pseudocode) when, where, and how various MAC 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 [IEEE802.3] are represented by previously defined objects in MIB-2 RFC1213 or in the Interfaces MIB RFC2863, 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.

Relation to MIB-2

This section applies only when this MIB is used in conjunction with the "old" RFC1213 interface group.

The relationship between an ethernet-like interface and an interface in the context of MIB-2 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 IDENTIFIER ::= { transmission 7 }

Relation to the Interfaces MIB

The Interface MIB RFC2863 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 4 of RFC2863 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 RFC2863 in order to understand the general intent of these areas.

Layering Model

Ordinarily, there are no sublayers for an ethernet-like interface. However there may be implementation-specific requirements which require the use of sublayers. One example is the use of 802.3 link aggregation. In this case, Annex 30C of [IEEE802.3] describes the layering model and the use of the ifStackTable for representing aggregated links. Another example is the use of the 802.3 WAN Interface Sublayer. In this case, The 802.3 WIS MIB RFC3637 describes the layering model and the use of the ifStackTable for representing the WAN sublayer.

Virtual Circuits

This medium does not support virtual circuits and this area is not applicable to this MIB.

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 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.

ifType

This MIB applies to interfaces which have the ifType value ethernetCsmacd(6). It is REQUIRED 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. Use of the ifType values iso88023Csmacd(7) and starLan(11) are deprecated, however some older implementations may return these values. Management applications should be prepared to receive these deprecated ifType values from older implementations.

There are three other interface types defined in the IANAifType-MIB for Ethernet. They are fastEther(62), fastEtherFX(69), and gigabitEthernet(117). These interface types were registered by individual vendors, not by any IETF working group. A requirement for compliance with this document is that all ethernet-like interfaces MUST return ethernetCsmacd(6) for ifType, and MUST NOT return fastEther(62), fastEtherFX(69), or gigabitEthernet(117). However, as there are fielded implementations that do return these obsolete ifType values, management applications SHOULD be prepared to receive them from older implementations.

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 RFC3636. Note that implementation of the 802.3 MAU MIB RFC3636 is REQUIRED for all ethernet-like interfaces.

ifXxxOctets

The Interface MIB octet counters, ifInOctets, ifOutOctets, ifHCInOctets and ifHCOutOctets, MUST include all octets in valid frames sent or received on the interface, including the MAC header and FCS, but not the preamble, start of frame delimiter, or extension octets. This corresponds to the definition of frameSize/8 in section

4.2.7.1 of [IEEE802.3] (frameSize is defined in bits rather than octets, and is defined as 2 x addressSize + lengthOrTypeSize + dataSize + crcSize). They do not include the number of octets in collided or failed transmit attempts, since the MAC layer driver typically does not have visibility to count these octets. They also do not include octets in received invalid frames, since this information is normally not passed to the MAC layer, and since non-promiscuous MAC implementations cannot reliably determine whether an invalid frame was actually addressed to this station.

Note that these counters do include octets in valid MAC control frames sent or received on the interface, as well as octets in otherwise valid received MAC frames that are discarded by the MAC layer for some reason (insufficient buffer space, unknown protocol, etc.).

Note that the octet counters in IF-MIB do not exactly match the definition of the octet counters in IEEE 802.3. aOctetsTransmittedOK and aOctetsReceivedOK count only the octets in the clientData and Pad fields, whereas ifInOctets and ifOutOctets include the entire MAC frame, including MAC header and FCS. However, the IF-MIB counters can be derived from the IEEE 802.3 counters as follows:

 ifInOctets = aOctetsReceivedOK + (18 * aFramesReceivedOK)
 ifOutOctets = aOctetsTransmittedOK + (18 * aFramesTransmittedOK)

Another difference to keep in mind between the IF-MIB counters and IEEE 802.3 counters is that in the IEEE 802.3 document, the frame counters and octet counters are always incremented together. aOctetsTransmittedOK counts the number of octets in frames that were counted by aFramesTransmittedOK. aOctetsReceivedOK counts the number of octets in frames that were counted by aFramesReceivedOK. This is not the case with the IF-MIB counters. The IF-MIB octet counters count the number of octets sent to or received from the layer below this interface, whereas the packet counters count the number of packets sent to or received from the layer above. Therefore, received MAC Control frames, ifInDiscards, and ifInUnknownProtos are counted by ifInOctets, but not ifInXcastPkts. Transmitted MAC Control frames are counted by ifOutOctets, but not ifOutXcastPkts. ifOutDiscards and ifOutErrors are counted by ifOutXcastPkts, but not ifOutOctets.

ifXxxXcastPkts

The packet counters in the IF-MIB do not exactly match the definition of the frame counters in IEEE 802.3. aFramesTransmittedOK counts the number of frames successfully transmitted on the interface, whereas ifOutUcastPkts, ifOutMulticastPkts and ifOutBroadcastPkts count the

number of transmit requests made from a higher layer, whether or not the transmit attempt was successful. This means that packets counted by ifOutErrors or ifOutDiscards are also counted by ifOutXcastPkts, but are not counted by aFramesTransmittedOK. This also means that, since MAC Control frames are generated by a sublayer internal to the interface layer rather than by a higher layer, they are not counted by ifOutXcastPkts, but are counted by aFramesTransmittedOK. Roughly:

 aFramesTransmittedOK = ifOutUcastPkts + ifOutMulticastPkts +
                        ifOutBroadcastPkts + dot3OutPauseFrames -
                        (ifOutErrors + ifOutDiscards)

Similarly, aFramesReceivedOK counts the number of frames received successfully by the interface, whether or not they are passed to a higher layer, whereas ifInUcastPkts, ifInMulticastPkts and ifInBroadcastPkts count only the number of packets passed to a higher layer. This means that packets counted by ifInDiscards or ifInUnknownProtos are also counted by aFramesReceivedOK, but are not counted by ifInXcastPkts. This also means that, since MAC Control frames are consumed by a sublayer internal to the interface layer and not passed to a higher layer, they are not counted by ifInXcastPkts, but are counted by aFramesReceivedOK. Roughly:

 aFramesReceivedOK = ifInUcastPkts + ifInMulticastPkts +
                     ifInBroadcastPkts + dot3InPauseFrames +
                     ifInDiscards + ifInUnknownProtos

This specification chooses to treat MAC control frames as being originated and consumed within the interface and not counted by the IF-MIB packet counters. MAC control frames are normally sent as multicast packets. In many network environments, MAC control frames can greatly outnumber multicast frames carrying actual data. If MAC control frames were included in the ifInMulticastPkts and ifOutMulticastPkts, the count of data-carrying multicast packets would tend to be drowned out by the count of MAC control frames, rendering those counters considerably less useful.

To better understand the issues surrounding the mapping of the IF-MIB packet and octet counters to an Ethernet interface, it is useful to refer to a Case Diagram [CASE] for the IF-MIB counters, with modifications to show the proper interpretation for the Ethernet interface layer.

                           layer above

   ifInUcastPkts+         ^           |     ifOutUcastPkts+
   ifInBroadcastPkts+ ----|----   ----|---- ifOutBroadcastPkts+
   ifInMulticastPkts      |           |     ifOutMulticastPkts
                          |           |
    dot3InPauseFrames <---|           |<--- dot3OutPauseFrames
                          |           |
         ifInDiscards <---|           |
                          |           |
    ifInUnknownProtos <---|           |---> ifOutDiscards
                          |           |
           ifInOctets ----|----   ----|---- ifOutOctets
                          |           |
           ifInErrors <---|           |---> ifOutErrors
                          |           V

                           layer below

ifMtu

The defined standard MTU for ethernet-like interfaces is 1500 octets. However, many implementations today support larger packet sizes than the IEEE 802.3 standard. The value of this object MUST reflect the actual MTU in use on the interface, whether it matches the standard MTU or not.

This value should reflect the value seen by the MAC client interface. When a higher layer protocol, like IP, is running over Ethernet framing, this is the MTU that will be seen by that higher layer protocol. However, most ethernet-like interfaces today run multiple protocols that use a mix of different framing types. For example, an IEEE 802.2 LLC type 1 client protocol will see an MTU of 1497 octets on an interface using the IEEE standard maximum packet size, and a protocol running over SNAP will see an MTU of 1492 octets on an interface using the IEEE standard maximum packet size. However, since specification mandates using the MTU as seen at the MAC client interface, the value of ifMtu would be reported as 1500 octets in these cases.

ifSpeed and ifHighSpeed

For ethernet-like interfaces operating at 1000 Megabits per second (Mb/s) or less, ifSpeed will represent the current operational speed of the interface in bits per second. For current interface types, this will be equal to 1,000,000 (1 million), 10,000,000 (10 million), 100,000,000 (100 million), or 1,000,000,000 (1 billion). ifHighSpeed will represent the current operational speed in millions of bits per

second. For current ethernet-like interfaces, this will be equal to 1, 10, 100, or 1,000. If the interface implements auto-negotiation, auto-negotiation is enabled for this interface, and the interface has not yet negotiated to an operational speed, these objects SHOULD reflect the maximum speed supported by the interface.

For ethernet-like interfaces operating at greater than 1000 Mb/s, ifHighSpeed will represent the current operational speed of the interface in millions of bits per second. Note that for WAN implementations, this will be the payload data rate over the WAN interface sublayer. For current implementations, this will be equal to 10,000 for LAN implementations of 10 Gb/s, and 9,294 for WAN implementations of the 10 Gb/s MAC over an OC-192 PHY. For these speeds, ifSpeed should report a maximum unsigned 32-bit value of 4,294,967,295 as specified in RFC2863.

Note that these 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 duplex mode of the interface may be determined by examining either the dot3StatsDuplexStatus object in this MIB module, or the ifMauType object in the 802.3 MAU MIB RFC3636.

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.

3.2.10. Specific Interface MIB Objects

The following table provides specific implementation guidelines for applying the interface group objects to ethernet-like media.

 Object                     Guidelines
 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 RFC2863.
 ifType                     Refer to section 3.2.4.
 ifMtu                      Refer to section 3.2.7.
 ifSpeed                    Refer to section 3.2.8.
 ifPhysAddress              Refer to section 3.2.9.
 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 RFC2863.
 ifInOctets                 The number of octets in valid MAC frames
                            received on this interface, including
                            the MAC header and FCS.  This does
                            include the number of octets in valid
                            MAC Control frames received on this
                            interface.  See section 3.2.5.
 ifInUcastPkts              Refer to RFC2863.  Note that this does
                            not include MAC Control frames, since
                            MAC Control frames are consumed by the
                            interface layer and are not passed to
                            any higher layer protocol.  See
                            section 3.2.6.
 ifInDiscards               Refer to RFC2863.
 ifInErrors                 The sum for this interface of
                            dot3StatsAlignmentErrors,
                            dot3StatsFCSErrors,
                            dot3StatsFrameTooLongs,
                            and dot3StatsInternalMacReceiveErrors.
 ifInUnknownProtos          Refer to RFC2863.
 ifOutOctets                The number of octets transmitted in
                            valid MAC frames on this interface,
                            including the MAC header and FCS.  This
                            does include the number of octets in
                            valid MAC Control frames transmitted on
                            this interface.  See section 3.2.5.
 ifOutUcastPkts             Refer to RFC2863.  Note that this does
                            not include MAC Control frames, since
                            MAC Control frames are generated by the
                            interface layer, and are not passed from
                            any higher layer protocol.  See section
                            3.2.6.
 ifOutDiscards              Refer to RFC2863.
 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 RFC2863.  Note that this does
                            not include MAC Control frames, since
                            MAC Control frames are consumed by the
                            interface layer and are not passed to
                            any higher layer protocol.  See section
                            3.2.6.
 ifInBroadcastPkts          Refer to RFC2863.  Note that this does
                            not include MAC Control frames, since
                            MAC Control frames are consumed by the
                            interface layer, and are not passed to
                            any higher layer protocol.  See section
                            3.2.6.
 ifOutMulticastPkts         Refer to RFC2863.  Note that this does
                            not include MAC Control frames, since
                            MAC Control frames are generated by the
                            interface layer, and are not passed from
                            any higher layer protocol.  See section
                            3.2.6.
 ifOutBroadcastPkts         Refer to RFC2863.  Note that this does
                            not include MAC Control frames, since
                            MAC Control frames are generated by the
                            interface layer, and are not passed from
                            any higher layer protocol.  See section
                            3.2.6.
 ifHCInOctets               64-bit versions of counters.  Required
 ifHCOutOctets              for ethernet-like interfaces that are
                            capable of operating at 20 Mb/s or
                            faster, even if the interface is
                            currently operating at less than
                            20 Mb/s.
 ifHCInUcastPkts            64-bit versions of packet counters.
 ifHCInMulticastPkts        Required for ethernet-like interfaces
 ifHCInBroadcastPkts        that are capable of operating at
 ifHCOutUcastPkts           640 Mb/s or faster, even if the
 ifHCOutMulticastPkts       interface is currently operating at
 ifHCOutBroadcastPkts       less than 640 Mb/s.
 ifLinkUpDownTrapEnable     Refer to RFC2863.  Default is
                            'enabled'
 ifHighSpeed                Refer to section 3.2.8.
 ifPromiscuousMode          Refer to RFC2863.
 ifConnectorPresent         This will normally be 'true'. It will
                            be 'false' in the case where this
                            interface uses the WAN Interface
                            Sublayer.  See RFC3637 for details.
 ifAlias                    Refer to RFC2863.
 ifCounterDiscontinuityTime Refer to RFC2863.  Note that a
                            discontinuity in the Interface MIB
                            counters may also indicate a
                            discontinuity in some or all of the
                            counters in this MIB that are associated
                            with that interface.
 ifStackHigherLayer         Refer to section 3.2.1.
 ifStackLowerLayer
 ifStackStatus
 ifRcvAddressAddress        Refer to section 3.2.3.
 ifRcvAddressStatus
 ifRcvAddressType

Relation to the 802.3 MAU MIB

Support for the mauModIfCompl3 compliance statement of the MAU-MIB RFC3636 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, and to control autonegotiation and duplex mode for the interface. Implementing this MIB module without implementing the MAU-MIB would leave applications with no standard way to determine the media type in use, and no standard way to control the duplex mode of the interface.

dot3StatsEtherChipSet

This document defines an object called dot3StatsEtherChipSet, which is used to identify the MAC hardware used to communicate on an interface. Previous versions of this document contained a number of OID assignments for some existing Ethernet chipsets. Maintaining that list as part of this document has proven to be problematic, so the OID assignments contained in previous versions of this document have now been moved to a separate document RFC2666.

The dot3StatsEtherChipSet object has now been deprecated. Implementation feedback indicates that this object is much more useful in theory than in practice. The object's utility in debugging network problems in the field appears to be limited. In those cases where it may be useful, it is not sufficient, since it identifies only the MAC chip, and not the PHY, PMD, or driver. The administrative overhead involved in maintaining a central registry of chipset OIDs cannot be justified for an object whose usefulness is questionable at best.

Implementations which continue to support this object for the purpose of backwards compatibility may continue to use the values defined in RFC2666. For chipsets not listed in RFC2666, implementors that wish to support this object and return a valid OBJECT IDENTIFIER value may assign OBJECT IDENTIFIERS within that part of the registration tree delegated to individual enterprises.

Mapping of IEEE 802.3 Managed Objects

IEEE 802.3 Managed Object Corresponding SNMP Object

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
.aDuplexStatus                   dot3StatsDuplexStatus
.aRateControlAbility             dot3StatsRateControlAbility
.aRateControlStatus              dot3StatsRateControlStatus
.acAddGroupAddress               IF-MIB - ifRcvAddressTable
.acDeleteGroupAddress            IF-MIB - ifRcvAddressTable
.acExecuteSelfTest               dot3TestLoopBack

oPHYEntity

.aPHYID                          dot3StatsIndex or
                              IF-MIB - ifIndex
.aSQETestErrors                  dot3StatsSQETestErrors
.aSymbolErrorDuringCarrier       dot3StatsSymbolErrors

oMACControlEntity

.aMACControlID                   dot3StatsIndex or
                              IF-MIB - ifIndex
.aMACControlFunctionsSupported   dot3ControlFunctionsSupported and
                              dot3ControlFunctionsEnabled
.aUnsupportedOpcodesReceived     dot3ControlInUnknownOpcodes

oPAUSEEntity

.aPAUSEMACCtrlFramesTransmitted  dot3OutPauseFrames
.aPAUSEMACCtrlFramesReceived     dot3InPauseFrames
  • Note that the octet counters in IF-MIB do not exactly match the

definition of the octet counters in IEEE 802.3. See section 3.2.5 for details.

Also note that the packet counters in the IF-MIB do not exactly match the definition of the frame counters in IEEE 802.3. See section 3.2.6 for details.

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
 .aMulticastReceiveStatus
 .acInitializeMAC

Please see RFC1369 for the detailed reasoning on why these objects were removed.

In addition, the following IEEE 802.3 managed objects have not been included in this MIB for the following reasons.

IEEE 802.3 Managed Object Disposition

oMACEntity

.aMACCapabilities                Can be derived from
                                 MAU-MIB - ifMauTypeListBits
 .aStretchRatio                  Implementation constant.

oPHYEntity

.aPhyType                        Can be derived from
                                 MAU-MIB - ifMauType
.aPhyTypeList                    Can be derived from
                                 MAU-MIB - ifMauTypeListBits
.aMIIDetect                      Not considered useful.
.aPhyAdminState                  Can already obtain interface
                                 state from IF-MIB - ifAdminStatus
                                 and MAU state from MAU-MIB -
                                 ifMauStatus.  Providing an
                                 additional state for the PHY
                                 was not considered useful.
.acPhyAdminControl               Can already control interface
                                 state from IF-MIB - ifAdminStatus
                                 and MAU state from MAU-MIB -
                                 ifMauStatus.  Providing separate
                                 admin control of the PHY was not
                                 considered useful.

oMACControlEntity

.aMACControlFramesTransmitted    Can be determined by summing the
                                 OutFrames counters for the
                                 individual control functions
.aMACControlFramesReceived       Can be determined by summing the
                                 InFrames counters for the
                                 individual control functions

oPAUSEEntity

.aPAUSELinkDelayAllowance        Not considered useful.

Definitions

EtherLike-MIB DEFINITIONS ::= BEGIN

   IMPORTS
       MODULE-IDENTITY, OBJECT-TYPE, OBJECT-IDENTITY,
       Integer32, Counter32, Counter64, mib-2, transmission
           FROM SNMPv2-SMI
       MODULE-COMPLIANCE, OBJECT-GROUP
           FROM SNMPv2-CONF
       TruthValue
           FROM SNMPv2-TC
       ifIndex, InterfaceIndex
           FROM IF-MIB;
   etherMIB MODULE-IDENTITY
       LAST-UPDATED "200309190000Z"  -- September 19, 2003
       ORGANIZATION "IETF Ethernet Interfaces and Hub MIB
                    Working Group"
       CONTACT-INFO
           "WG E-mail: [email protected]
         To subscribe: [email protected]
                Chair: Dan Romascanu
               Postal: Avaya Inc.
                       Atidum Technology Park, Bldg. 3
                       Tel Aviv 61131
                       Israel
                  Tel: +972 3 645 8414
               E-mail: [email protected]
              Editor: John Flick
              Postal: Hewlett-Packard Company
                      8000 Foothills Blvd. M/S 5557
                      Roseville, CA 95747-5557
                      USA
                 Tel: +1 916 785 4018
                 Fax: +1 916 785 1199
              E-mail: [email protected]"
       DESCRIPTION "The MIB module to describe generic objects for
                   ethernet-like network interfaces.
                   The following reference is used throughout this
                   MIB module:
                   [IEEE 802.3 Std] refers to:
                      IEEE Std 802.3, 2002 Edition: 'IEEE Standard
                      for Information technology -
                      Telecommunications and information exchange
                      between systems - Local and metropolitan
                      area networks - Specific requirements -
                      Part 3: Carrier sense multiple access with
                      collision detection (CSMA/CD) access method
                      and physical layer specifications', as
                      amended by IEEE Std 802.3ae-2002:
                      'Amendment: Media Access Control (MAC)
                      Parameters, Physical Layer, and Management
                      Parameters for 10 Gb/s Operation', August,
                      2002.
                   Of particular interest is Clause 30, '10 Mb/s,
                   100 Mb/s, 1000 Mb/s, and 10 Gb/s Management'.
                   Copyright (C) The Internet Society (2003).  This
                   version of this MIB module is part of RFC 3635;
                   see the RFC itself for full legal notices."
       REVISION    "200309190000Z"  -- September 19, 2003
       DESCRIPTION "Updated to include support for 10 Gb/sec
                    interfaces.  This resulted in the following
                    revisions:
                    - Updated dot3StatsAlignmentErrors and
                      dot3StatsSymbolErrors DESCRIPTIONs to
                      reflect behaviour at 10 Gb/s
                    - Added dot3StatsRateControlAbility and
                      dot3RateControlStatus for management
                      of the Rate Control function in 10 Gb/s
                      WAN applications
                    - Added 64-bit versions of all counters
                      that are used on high-speed ethernet
                      interfaces
                    - Added object groups to contain the new
                      objects
                    - Deprecated etherStatsBaseGroup and
                      split into etherStatsBaseGroup2 and
                      etherStatsHalfDuplexGroup, so that
                      interfaces which can only operate at
                      full-duplex do not need to implement
                      half-duplex-only statistics
                    - Deprecated dot3Compliance and replaced
                      it with dot3Compliance2, which includes
                      the compliance information for the new
                      object groups
                    In addition, the dot3Tests and dot3Errors
                    object identities have been deprecated,
                    since there is no longer a standard method
                    for using them.
                    This version published as RFC 3635."
       REVISION    "199908240400Z"  -- August 24, 1999
       DESCRIPTION "Updated to include support for 1000 Mb/sec
                    interfaces and full-duplex interfaces.
                    This version published as RFC 2665."
       REVISION    "199806032150Z"  -- June 3, 1998
       DESCRIPTION "Updated to include support for 100 Mb/sec
                    interfaces.
                    This version published as RFC 2358."
       REVISION    "199402030400Z"  -- February 3, 1994
       DESCRIPTION "Initial 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.
                   There will be one row in this table for each
                   ethernet-like interface in the 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,
           dot3StatsEtherChipSet               OBJECT IDENTIFIER,
           dot3StatsSymbolErrors               Counter32,
           dot3StatsDuplexStatus               INTEGER,
           dot3StatsRateControlAbility         TruthValue,
           dot3StatsRateControlStatus          INTEGER
       }
   dot3StatsIndex OBJECT-TYPE
       SYNTAX      InterfaceIndex
       MAX-ACCESS  read-only  -- read-only since originally an
                              -- SMIv1 index
       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."
       REFERENCE   "RFC 2863, 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 pertain are,
                   according to the conventions of IEEE 802.3
                   Layer Management, counted exclusively according
                   to the error status presented to the LLC.
                   This counter does not increment for group
                   encoding schemes greater than 4 bits per group.
                   For interfaces operating at 10 Gb/s, this
                   counter can roll over in less than 5 minutes if
                   it is incrementing at its maximum rate.  Since
                   that amount of time could be less than a
                   management station's poll cycle time, in order
                   to avoid a loss of information, a management
                   station is advised to poll the
                   dot3HCStatsAlignmentErrors object for 10 Gb/s
                   or faster interfaces.
                   Discontinuities in the value of this counter can
                   occur at re-initialization of the management
                   system, and at other times as indicated by the
                   value of ifCounterDiscontinuityTime."
       REFERENCE   "[IEEE 802.3 Std.], 30.3.1.1.7,
                   aAlignmentErrors"
       ::= { 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.  This
                   count does not include frames received with
                   frame-too-long or frame-too-short error.
                   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 pertain are,
                   according to the conventions of IEEE 802.3
                   Layer Management, counted exclusively according
                   to the error status presented to the LLC.
                   Note:  Coding errors detected by the physical
                   layer for speeds above 10 Mb/s will cause the
                   frame to fail the FCS check.
                   For interfaces operating at 10 Gb/s, this
                   counter can roll over in less than 5 minutes if
                   it is incrementing at its maximum rate.  Since
                   that amount of time could be less than a
                   management station's poll cycle time, in order
                   to avoid a loss of information, a management
                   station is advised to poll the
                   dot3HCStatsFCSErrors object for 10 Gb/s or
                   faster interfaces.
                   Discontinuities in the value of this counter can
                   occur at re-initialization of the management
                   system, and at other times as indicated by the
                   value of ifCounterDiscontinuityTime."
       REFERENCE   "[IEEE 802.3 Std.], 30.3.1.1.6,
                   aFrameCheckSequenceErrors."
       ::= { dot3StatsEntry 3 }
   dot3StatsSingleCollisionFrames OBJECT-TYPE
       SYNTAX      Counter32
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION "A count of frames that are involved in a single
                   collision, and are subsequently transmitted
                   successfully.
                   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.
                   This counter does not increment when the
                   interface is operating in full-duplex mode.
                   Discontinuities in the value of this counter can
                   occur at re-initialization of the management
                   system, and at other times as indicated by the
                   value of ifCounterDiscontinuityTime."
       REFERENCE   "[IEEE 802.3 Std.], 30.3.1.1.3,
                   aSingleCollisionFrames."
       ::= { dot3StatsEntry 4 }
   dot3StatsMultipleCollisionFrames OBJECT-TYPE
       SYNTAX      Counter32
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION "A count of frames that are involved in more
                   than one collision and are subsequently
                   transmitted successfully.
                   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.
                   This counter does not increment when the
                   interface is operating in full-duplex mode.
                   Discontinuities in the value of this counter can
                   occur at re-initialization of the management
                   system, and at other times as indicated by the
                   value of ifCounterDiscontinuityTime."
       REFERENCE   "[IEEE 802.3 Std.], 30.3.1.1.4,
                   aMultipleCollisionFrames."
       ::= { dot3StatsEntry 5 }
   dot3StatsSQETestErrors OBJECT-TYPE
       SYNTAX      Counter32
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION "A count of times that the SQE TEST ERROR
                   is received on a particular interface. The
                   SQE TEST ERROR is set in accordance with the
                   rules for verification of the SQE detection
                   mechanism in the PLS Carrier Sense Function as
                   described in IEEE Std. 802.3, 2000 Edition,
                   section 7.2.4.6.
                   This counter does not increment on interfaces
                   operating at speeds greater than 10 Mb/s, or on
                   interfaces operating in full-duplex mode.
                   Discontinuities in the value of this counter can
                   occur at re-initialization of the management
                   system, and at other times as indicated by the
                   value of ifCounterDiscontinuityTime."
       REFERENCE   "[IEEE 802.3 Std.], 7.2.4.6, also 30.3.2.1.4,
                   aSQETestErrors."
       ::= { 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.
                   This counter does not increment when the
                   interface is operating in full-duplex mode.
                   Discontinuities in the value of this counter can
                   occur at re-initialization of the management
                   system, and at other times as indicated by the
                   value of ifCounterDiscontinuityTime."
       REFERENCE   "[IEEE 802.3 Std.], 30.3.1.1.9,
                   aFramesWithDeferredXmissions."
       ::= { 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
                   one slotTime into the transmission of a packet.
                   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.
                   This counter does not increment when the
                   interface is operating in full-duplex mode.
                   Discontinuities in the value of this counter can
                   occur at re-initialization of the management
                   system, and at other times as indicated by the
                   value of ifCounterDiscontinuityTime."
       REFERENCE   "[IEEE 802.3 Std.], 30.3.1.1.10,
                   aLateCollisions."
       ::= { dot3StatsEntry 8 }
   dot3StatsExcessiveCollisions 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 excessive
                   collisions.
                   This counter does not increment when the
                   interface is operating in full-duplex mode.
                   Discontinuities in the value of this counter can
                   occur at re-initialization of the management
                   system, and at other times as indicated by the
                   value of ifCounterDiscontinuityTime."
       REFERENCE   "[IEEE 802.3 Std.], 30.3.1.1.11,
                   aFramesAbortedDueToXSColls."
       ::= { 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.
                   For interfaces operating at 10 Gb/s, this
                   counter can roll over in less than 5 minutes if
                   it is incrementing at its maximum rate.  Since
                   that amount of time could be less than a
                   management station's poll cycle time, in order
                   to avoid a loss of information, a management
                   station is advised to poll the
                   dot3HCStatsInternalMacTransmitErrors object for
                   10 Gb/s or faster interfaces.
                   Discontinuities in the value of this counter can
                   occur at re-initialization of the management
                   system, and at other times as indicated by the
                   value of ifCounterDiscontinuityTime."
       REFERENCE   "[IEEE 802.3 Std.], 30.3.1.1.12,
                   aFramesLostDueToIntMACXmitError."
       ::= { 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.
                   This counter does not increment when the
                   interface is operating in full-duplex mode.
                   Discontinuities in the value of this counter can
                   occur at re-initialization of the management
                   system, and at other times as indicated by the
                   value of ifCounterDiscontinuityTime."
       REFERENCE   "[IEEE 802.3 Std.], 30.3.1.1.13,
                   aCarrierSenseErrors."
       ::= { dot3StatsEntry 11 }
   -- { dot3StatsEntry 12 } is not assigned
   dot3StatsFrameTooLongs OBJECT-TYPE
       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 pertain are,
                   according to the conventions of IEEE 802.3
                   Layer Management, counted exclusively according
                   to the error status presented to the LLC.
                   For interfaces operating at 10 Gb/s, this
                   counter can roll over in less than 80 minutes if
                   it is incrementing at its maximum rate.  Since
                   that amount of time could be less than a
                   management station's poll cycle time, in order
                   to avoid a loss of information, a management
                   station is advised to poll the
                   dot3HCStatsFrameTooLongs object for 10 Gb/s
                   or faster interfaces.
                   Discontinuities in the value of this counter can
                   occur at re-initialization of the management
                   system, and at other times as indicated by the
                   value of ifCounterDiscontinuityTime."
       REFERENCE   "[IEEE 802.3 Std.], 30.3.1.1.25,
                   aFrameTooLongErrors."
       ::= { 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.
                   For interfaces operating at 10 Gb/s, this
                   counter can roll over in less than 5 minutes if
                   it is incrementing at its maximum rate.  Since
                   that amount of time could be less than a
                   management station's poll cycle time, in order
                   to avoid a loss of information, a management
                   station is advised to poll the
                   dot3HCStatsInternalMacReceiveErrors object for
                   10 Gb/s or faster interfaces.
                   Discontinuities in the value of this counter can
                   occur at re-initialization of the management
                   system, and at other times as indicated by the
                   value of ifCounterDiscontinuityTime."
       REFERENCE   "[IEEE 802.3 Std.], 30.3.1.1.15,
                   aFramesLostDueToIntMACRcvError."
       ::= { dot3StatsEntry 16 }
   dot3StatsEtherChipSet OBJECT-TYPE
       SYNTAX      OBJECT IDENTIFIER
       MAX-ACCESS  read-only
       STATUS      deprecated
       DESCRIPTION "******** THIS OBJECT IS DEPRECATED ********
                   This object contains an OBJECT IDENTIFIER
                   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.
                   This object has been deprecated.  Implementation
                   feedback indicates that it is of limited use for
                   debugging network problems in the field, and
                   the administrative overhead involved in
                   maintaining a registry of chipset OIDs is not
                   justified."
       ::= { dot3StatsEntry 17 }
   dot3StatsSymbolErrors OBJECT-TYPE
       SYNTAX      Counter32
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION "For an interface operating at 100 Mb/s, the
                   number of times there was an invalid data symbol
                   when a valid carrier was present.
                   For an interface operating in half-duplex mode
                   at 1000 Mb/s, the number of times the receiving
                   media is non-idle (a carrier event) for a period
                   of time equal to or greater than slotTime, and
                   during which there was at least one occurrence
                   of an event that causes the PHY to indicate
                   'Data reception error' or 'carrier extend error'
                   on the GMII.
                   For an interface operating in full-duplex mode
                   at 1000 Mb/s, the number of times the receiving
                   media is non-idle (a carrier event) for a period
                   of time equal to or greater than minFrameSize,
                   and during which there was at least one
                   occurrence of an event that causes the PHY to
                   indicate 'Data reception error' on the GMII.
                   For an interface operating at 10 Gb/s, the
                   number of times the receiving media is non-idle
                   (a carrier event) for a period of time equal to
                   or greater than minFrameSize, and during which
                   there was at least one occurrence of an event
                   that causes the PHY to indicate 'Receive Error'
                   on the XGMII.
                   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.  This count does
                   not increment if a collision is present.
                   This counter does not increment when the
                   interface is operating at 10 Mb/s.
                   For interfaces operating at 10 Gb/s, this
                   counter can roll over in less than 5 minutes if
                   it is incrementing at its maximum rate.  Since
                   that amount of time could be less than a
                   management station's poll cycle time, in order
                   to avoid a loss of information, a management
                   station is advised to poll the
                   dot3HCStatsSymbolErrors object for 10 Gb/s
                   or faster interfaces.
                   Discontinuities in the value of this counter can
                   occur at re-initialization of the management
                   system, and at other times as indicated by the
                   value of ifCounterDiscontinuityTime."
       REFERENCE   "[IEEE 802.3 Std.], 30.3.2.1.5,
                   aSymbolErrorDuringCarrier."
       ::= { dot3StatsEntry 18 }
   dot3StatsDuplexStatus OBJECT-TYPE
       SYNTAX      INTEGER {
                       unknown(1),
                       halfDuplex(2),
                       fullDuplex(3)
                   }
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION "The current mode of operation of the MAC
                   entity.  'unknown' indicates that the current
                   duplex mode could not be determined.
                   Management control of the duplex mode is
                   accomplished through the MAU MIB.  When
                   an interface does not support autonegotiation,
                   or when autonegotiation is not enabled, the
                   duplex mode is controlled using
                   ifMauDefaultType.  When autonegotiation is
                   supported and enabled, duplex mode is controlled
                   using ifMauAutoNegAdvertisedBits.  In either
                   case, the currently operating duplex mode is
                   reflected both in this object and in ifMauType.
                   Note that this object provides redundant
                   information with ifMauType.  Normally, redundant
                   objects are discouraged.  However, in this
                   instance, it allows a management application to
                   determine the duplex status of an interface
                   without having to know every possible value of
                   ifMauType.  This was felt to be sufficiently
                   valuable to justify the redundancy."
       REFERENCE   "[IEEE 802.3 Std.], 30.3.1.1.32,
                   aDuplexStatus."
       ::= { dot3StatsEntry 19 }
   dot3StatsRateControlAbility OBJECT-TYPE
       SYNTAX      TruthValue
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION "'true' for interfaces operating at speeds above
                   1000 Mb/s that support Rate Control through
                   lowering the average data rate of the MAC
                   sublayer, with frame granularity, and 'false'
                   otherwise."
       REFERENCE   "[IEEE 802.3 Std.], 30.3.1.1.33,
                   aRateControlAbility."
       ::= { dot3StatsEntry 20 }
   dot3StatsRateControlStatus OBJECT-TYPE
       SYNTAX      INTEGER {
                       rateControlOff(1),
                       rateControlOn(2),
                       unknown(3)
                   }
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION "The current Rate Control mode of operation of
                   the MAC sublayer of this interface."
       REFERENCE   "[IEEE 802.3 Std.], 30.3.1.1.34,
                   aRateControlStatus."
       ::= { dot3StatsEntry 21 }
   -- 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."
       REFERENCE   "[IEEE 802.3 Std.], 30.3.1.1.30,
                   aCollisionFrames."
       ::= { dot3 5 }
   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        Integer32,
           dot3CollFrequencies  Counter32
       }
   -- { dot3CollEntry 1 } is no longer in use
   dot3CollCount OBJECT-TYPE
       SYNTAX      Integer32 (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.
                   No other instance of dot3CollFrequencies would
                   be incremented in this example.
                   This counter does not increment when the
                   interface is operating in full-duplex mode.
                   Discontinuities in the value of this counter can
                   occur at re-initialization of the management
                   system, and at other times as indicated by the
                   value of ifCounterDiscontinuityTime."
       ::= { dot3CollEntry 3 }
   dot3ControlTable OBJECT-TYPE
       SYNTAX      SEQUENCE OF Dot3ControlEntry
       MAX-ACCESS  not-accessible
       STATUS      current
       DESCRIPTION "A table of descriptive and status information
                   about the MAC Control sublayer on the
                   ethernet-like interfaces attached to a
                   particular system.  There will be one row in
                   this table for each ethernet-like interface in
                   the system which implements the MAC Control
                   sublayer.  If some, but not all, of the
                   ethernet-like interfaces in the system implement
                   the MAC Control sublayer, there will be fewer
                   rows in this table than in the dot3StatsTable."
       ::= { dot3 9 }
   dot3ControlEntry OBJECT-TYPE
       SYNTAX      Dot3ControlEntry
       MAX-ACCESS  not-accessible
       STATUS      current
       DESCRIPTION "An entry in the table, containing information
                   about the MAC Control sublayer on a single
                   ethernet-like interface."
       INDEX       { dot3StatsIndex }
       ::= { dot3ControlTable 1 }
   Dot3ControlEntry ::=
       SEQUENCE {
           dot3ControlFunctionsSupported       BITS,
           dot3ControlInUnknownOpcodes         Counter32,
           dot3HCControlInUnknownOpcodes       Counter64
       }
   dot3ControlFunctionsSupported OBJECT-TYPE
       SYNTAX      BITS {
                       pause(0)   -- 802.3 flow control
                   }
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION "A list of the possible MAC Control functions
                   implemented for this interface."
       REFERENCE   "[IEEE 802.3 Std.], 30.3.3.2,
                   aMACControlFunctionsSupported."
       ::= { dot3ControlEntry 1 }
   dot3ControlInUnknownOpcodes OBJECT-TYPE
       SYNTAX      Counter32
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION "A count of MAC Control frames received on this
                   interface that contain an opcode that is not
                   supported by this device.
                   For interfaces operating at 10 Gb/s, this
                   counter can roll over in less than 5 minutes if
                   it is incrementing at its maximum rate.  Since
                   that amount of time could be less than a
                   management station's poll cycle time, in order
                   to avoid a loss of information, a management
                   station is advised to poll the
                   dot3HCControlInUnknownOpcodes object for 10 Gb/s
                   or faster interfaces.
                   Discontinuities in the value of this counter can
                   occur at re-initialization of the management
                   system, and at other times as indicated by the
                   value of ifCounterDiscontinuityTime."
       REFERENCE   "[IEEE 802.3 Std.], 30.3.3.5,
                   aUnsupportedOpcodesReceived"
       ::= { dot3ControlEntry 2 }
   dot3HCControlInUnknownOpcodes OBJECT-TYPE
       SYNTAX      Counter64
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION "A count of MAC Control frames received on this
                   interface that contain an opcode that is not
                   supported by this device.
                   This counter is a 64 bit version of
                   dot3ControlInUnknownOpcodes.  It should be used
                   on interfaces operating at 10 Gb/s or faster.
                   Discontinuities in the value of this counter can
                   occur at re-initialization of the management
                   system, and at other times as indicated by the
                   value of ifCounterDiscontinuityTime."
       REFERENCE   "[IEEE 802.3 Std.], 30.3.3.5,
                   aUnsupportedOpcodesReceived"
       ::= { dot3ControlEntry 3 }
   dot3PauseTable OBJECT-TYPE
       SYNTAX      SEQUENCE OF Dot3PauseEntry
       MAX-ACCESS  not-accessible
       STATUS      current
       DESCRIPTION "A table of descriptive and status information
                   about the MAC Control PAUSE function on the
                   ethernet-like interfaces attached to a
                   particular system. There will be one row in
                   this table for each ethernet-like interface in
                   the system which supports the MAC Control PAUSE
                   function (i.e., the 'pause' bit in the
                   corresponding instance of
                   dot3ControlFunctionsSupported is set).  If some,
                   but not all, of the ethernet-like interfaces in
                   the system implement the MAC Control PAUSE
                   function (for example, if some interfaces only
                   support half-duplex), there will be fewer rows
                   in this table than in the dot3StatsTable."
       ::= { dot3 10 }
   dot3PauseEntry OBJECT-TYPE
       SYNTAX      Dot3PauseEntry
       MAX-ACCESS  not-accessible
       STATUS      current
       DESCRIPTION "An entry in the table, containing information
                   about the MAC Control PAUSE function on a single
                   ethernet-like interface."
       INDEX       { dot3StatsIndex }
       ::= { dot3PauseTable 1 }
   Dot3PauseEntry ::=
       SEQUENCE {
           dot3PauseAdminMode                  INTEGER,
           dot3PauseOperMode                   INTEGER,
           dot3InPauseFrames                   Counter32,
           dot3OutPauseFrames                  Counter32,
           dot3HCInPauseFrames                 Counter64,
           dot3HCOutPauseFrames                Counter64
       }
   dot3PauseAdminMode OBJECT-TYPE
       SYNTAX      INTEGER {
                       disabled(1),
                       enabledXmit(2),
                       enabledRcv(3),
                       enabledXmitAndRcv(4)
                   }
       MAX-ACCESS  read-write
       STATUS      current
       DESCRIPTION "This object is used to configure the default
                   administrative PAUSE mode for this interface.
                   This object represents the
                   administratively-configured PAUSE mode for this
                   interface.  If auto-negotiation is not enabled
                   or is not implemented for the active MAU
                   attached to this interface, the value of this
                   object determines the operational PAUSE mode
                   of the interface whenever it is operating in
                   full-duplex mode.  In this case, a set to this
                   object will force the interface into the
                   specified mode.
                   If auto-negotiation is implemented and enabled
                   for the MAU attached to this interface, the
                   PAUSE mode for this interface is determined by
                   auto-negotiation, and the value of this object
                   denotes the mode to which the interface will
                   automatically revert if/when auto-negotiation is
                   later disabled.  Note that when auto-negotiation
                   is running, administrative control of the PAUSE
                   mode may be accomplished using the
                   ifMauAutoNegCapAdvertisedBits object in the
                   MAU-MIB.
                   Note that the value of this object is ignored
                   when the interface is not operating in
                   full-duplex mode.
                   An attempt to set this object to
                   'enabledXmit(2)' or 'enabledRcv(3)' will fail
                   on interfaces that do not support operation
                   at greater than 100 Mb/s."
       ::= { dot3PauseEntry 1 }
   dot3PauseOperMode OBJECT-TYPE
       SYNTAX      INTEGER {
                       disabled(1),
                       enabledXmit(2),
                       enabledRcv(3),
                       enabledXmitAndRcv(4)
                   }
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION "This object reflects the PAUSE mode currently
                   in use on this interface, as determined by
                   either (1) the result of the auto-negotiation
                   function or (2) if auto-negotiation is not
                   enabled or is not implemented for the active MAU
                   attached to this interface, by the value of
                   dot3PauseAdminMode.  Interfaces operating at
                   100 Mb/s or less will never return
                   'enabledXmit(2)' or 'enabledRcv(3)'.  Interfaces
                   operating in half-duplex mode will always return
                   'disabled(1)'.  Interfaces on which
                   auto-negotiation is enabled but not yet
                   completed should return the value
                   'disabled(1)'."
       ::= { dot3PauseEntry 2 }
   dot3InPauseFrames OBJECT-TYPE
       SYNTAX      Counter32
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION "A count of MAC Control frames received on this
                   interface with an opcode indicating the PAUSE
                   operation.
                   This counter does not increment when the
                   interface is operating in half-duplex mode.
                   For interfaces operating at 10 Gb/s, this
                   counter can roll over in less than 5 minutes if
                   it is incrementing at its maximum rate.  Since
                   that amount of time could be less than a
                   management station's poll cycle time, in order
                   to avoid a loss of information, a management
                   station is advised to poll the
                   dot3HCInPauseFrames object for 10 Gb/s or
                   faster interfaces.
                   Discontinuities in the value of this counter can
                   occur at re-initialization of the management
                   system, and at other times as indicated by the
                   value of ifCounterDiscontinuityTime."
       REFERENCE   "[IEEE 802.3 Std.], 30.3.4.3,
                   aPAUSEMACCtrlFramesReceived."
       ::= { dot3PauseEntry 3 }
   dot3OutPauseFrames OBJECT-TYPE
       SYNTAX      Counter32
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION "A count of MAC Control frames transmitted on
                   this interface with an opcode indicating the
                   PAUSE operation.
                   This counter does not increment when the
                   interface is operating in half-duplex mode.
                   For interfaces operating at 10 Gb/s, this
                   counter can roll over in less than 5 minutes if
                   it is incrementing at its maximum rate.  Since
                   that amount of time could be less than a
                   management station's poll cycle time, in order
                   to avoid a loss of information, a management
                   station is advised to poll the
                   dot3HCOutPauseFrames object for 10 Gb/s or
                   faster interfaces.
                   Discontinuities in the value of this counter can
                   occur at re-initialization of the management
                   system, and at other times as indicated by the
                   value of ifCounterDiscontinuityTime."
       REFERENCE   "[IEEE 802.3 Std.], 30.3.4.2,
                   aPAUSEMACCtrlFramesTransmitted."
       ::= { dot3PauseEntry 4 }
   dot3HCInPauseFrames OBJECT-TYPE
       SYNTAX      Counter64
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION "A count of MAC Control frames received on this
                   interface with an opcode indicating the PAUSE
                   operation.
                   This counter does not increment when the
                   interface is operating in half-duplex mode.
                   This counter is a 64 bit version of
                   dot3InPauseFrames.  It should be used on
                   interfaces operating at 10 Gb/s or faster.
                   Discontinuities in the value of this counter can
                   occur at re-initialization of the management
                   system, and at other times as indicated by the
                   value of ifCounterDiscontinuityTime."
       REFERENCE   "[IEEE 802.3 Std.], 30.3.4.3,
                   aPAUSEMACCtrlFramesReceived."
       ::= { dot3PauseEntry 5 }
   dot3HCOutPauseFrames OBJECT-TYPE
       SYNTAX      Counter64
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION "A count of MAC Control frames transmitted on
                   this interface with an opcode indicating the
                   PAUSE operation.
                   This counter does not increment when the
                   interface is operating in half-duplex mode.
                   This counter is a 64 bit version of
                   dot3OutPauseFrames.  It should be used on
                   interfaces operating at 10 Gb/s or faster.
                   Discontinuities in the value of this counter can
                   occur at re-initialization of the management
                   system, and at other times as indicated by the
                   value of ifCounterDiscontinuityTime."
       REFERENCE   "[IEEE 802.3 Std.], 30.3.4.2,
                   aPAUSEMACCtrlFramesTransmitted."
       ::= { dot3PauseEntry 6 }
   dot3HCStatsTable OBJECT-TYPE
       SYNTAX      SEQUENCE OF Dot3HCStatsEntry
       MAX-ACCESS  not-accessible
       STATUS      current
       DESCRIPTION "A table containing 64-bit versions of error
                   counters from the dot3StatsTable.  The 32-bit
                   versions of these counters may roll over quite
                   quickly on higher speed ethernet interfaces.
                   The counters that have 64-bit versions in this
                   table are the counters that apply to full-duplex
                   interfaces, since 10 Gb/s and faster
                   ethernet-like interfaces do not support
                   half-duplex, and very few 1000 Mb/s
                   ethernet-like interfaces support half-duplex.
                   Entries in this table are recommended for
                   interfaces capable of operating at 1000 Mb/s or
                   faster, and are required for interfaces capable
                   of operating at 10 Gb/s or faster.  Lower speed
                   ethernet-like interfaces do not need entries in
                   this table, in which case there may be fewer
                   entries in this table than in the
                   dot3StatsTable. However, implementations
                   containing interfaces with a mix of speeds may
                   choose to implement entries in this table for
                   all ethernet-like interfaces."
       ::= { dot3 11 }
   dot3HCStatsEntry OBJECT-TYPE
       SYNTAX      Dot3HCStatsEntry
       MAX-ACCESS  not-accessible
       STATUS      current
       DESCRIPTION "An entry containing 64-bit statistics for a
                   single ethernet-like interface."
       INDEX       { dot3StatsIndex }
       ::= { dot3HCStatsTable 1 }
   Dot3HCStatsEntry ::=
       SEQUENCE {
           dot3HCStatsAlignmentErrors           Counter64,
           dot3HCStatsFCSErrors                 Counter64,
           dot3HCStatsInternalMacTransmitErrors Counter64,
           dot3HCStatsFrameTooLongs             Counter64,
           dot3HCStatsInternalMacReceiveErrors  Counter64,
           dot3HCStatsSymbolErrors              Counter64
       }
   dot3HCStatsAlignmentErrors OBJECT-TYPE
       SYNTAX      Counter64
       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 pertain are,
                   according to the conventions of IEEE 802.3
                   Layer Management, counted exclusively according
                   to the error status presented to the LLC.
                   This counter does not increment for group
                   encoding schemes greater than 4 bits per group.
                   This counter is a 64 bit version of
                   dot3StatsAlignmentErrors.  It should be used
                   on interfaces operating at 10 Gb/s or faster.
                   Discontinuities in the value of this counter can
                   occur at re-initialization of the management
                   system, and at other times as indicated by the
                   value of ifCounterDiscontinuityTime."
       REFERENCE   "[IEEE 802.3 Std.], 30.3.1.1.7,
                   aAlignmentErrors"
       ::= { dot3HCStatsEntry 1 }
   dot3HCStatsFCSErrors OBJECT-TYPE
       SYNTAX      Counter64
       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.  This
                   count does not include frames received with
                   frame-too-long or frame-too-short error.
                   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 pertain are,
                   according to the conventions of IEEE 802.3
                   Layer Management, counted exclusively according
                   to the error status presented to the LLC.
                   Note:  Coding errors detected by the physical
                   layer for speeds above 10 Mb/s will cause the
                   frame to fail the FCS check.
                   This counter is a 64 bit version of
                   dot3StatsFCSErrors.  It should be used on
                   interfaces operating at 10 Gb/s or faster.
                   Discontinuities in the value of this counter can
                   occur at re-initialization of the management
                   system, and at other times as indicated by the
                   value of ifCounterDiscontinuityTime."
       REFERENCE   "[IEEE 802.3 Std.], 30.3.1.1.6,
                   aFrameCheckSequenceErrors."
       ::= { dot3HCStatsEntry 2 }
   dot3HCStatsInternalMacTransmitErrors OBJECT-TYPE
       SYNTAX      Counter64
       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.
                   This counter is a 64 bit version of
                   dot3StatsInternalMacTransmitErrors.  It should
                   be used on interfaces operating at 10 Gb/s or
                   faster.
                   Discontinuities in the value of this counter can
                   occur at re-initialization of the management
                   system, and at other times as indicated by the
                   value of ifCounterDiscontinuityTime."
       REFERENCE   "[IEEE 802.3 Std.], 30.3.1.1.12,
                   aFramesLostDueToIntMACXmitError."
       ::= { dot3HCStatsEntry 3 }
   dot3HCStatsFrameTooLongs OBJECT-TYPE
       SYNTAX      Counter64
       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 pertain are,
                   according to the conventions of IEEE 802.3
                   Layer Management, counted exclusively according
                   to the error status presented to the LLC.
                   This counter is a 64 bit version of
                   dot3StatsFrameTooLongs.  It should be used on
                   interfaces operating at 10 Gb/s or faster.
                   Discontinuities in the value of this counter can
                   occur at re-initialization of the management
                   system, and at other times as indicated by the
                   value of ifCounterDiscontinuityTime."
       REFERENCE   "[IEEE 802.3 Std.], 30.3.1.1.25,
                   aFrameTooLongErrors."
       ::= { dot3HCStatsEntry 4 }
   dot3HCStatsInternalMacReceiveErrors OBJECT-TYPE
       SYNTAX      Counter64
       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.
                   This counter is a 64 bit version of
                   dot3StatsInternalMacReceiveErrors.  It should be
                   used on interfaces operating at 10 Gb/s or
                   faster.
                   Discontinuities in the value of this counter can
                   occur at re-initialization of the management
                   system, and at other times as indicated by the
                   value of ifCounterDiscontinuityTime."
       REFERENCE   "[IEEE 802.3 Std.], 30.3.1.1.15,
                   aFramesLostDueToIntMACRcvError."
       ::= { dot3HCStatsEntry 5 }
   dot3HCStatsSymbolErrors OBJECT-TYPE
       SYNTAX      Counter64
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION "For an interface operating at 100 Mb/s, the
                   number of times there was an invalid data symbol
                   when a valid carrier was present.
                   For an interface operating in half-duplex mode
                   at 1000 Mb/s, the number of times the receiving
                   media is non-idle (a carrier event) for a period
                   of time equal to or greater than slotTime, and
                   during which there was at least one occurrence
                   of an event that causes the PHY to indicate
                   'Data reception error' or 'carrier extend error'
                   on the GMII.
                   For an interface operating in full-duplex mode
                   at 1000 Mb/s, the number of times the receiving
                   media is non-idle (a carrier event) for a period
                   of time equal to or greater than minFrameSize,
                   and during which there was at least one
                   occurrence of an event that causes the PHY to
                   indicate 'Data reception error' on the GMII.
                   For an interface operating at 10 Gb/s, the
                   number of times the receiving media is non-idle
                   (a carrier event) for a period of time equal to
                   or greater than minFrameSize, and during which
                   there was at least one occurrence of an event
                   that causes the PHY to indicate 'Receive Error'
                   on the XGMII.
                   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.  This count does
                   not increment if a collision is present.
                   This counter is a 64 bit version of
                   dot3StatsSymbolErrors.  It should be used on
                   interfaces operating at 10 Gb/s or faster.
                   Discontinuities in the value of this counter can
                   occur at re-initialization of the management
                   system, and at other times as indicated by the
                   value of ifCounterDiscontinuityTime."
       REFERENCE   "[IEEE 802.3 Std.], 30.3.2.1.5,
                   aSymbolErrorDuringCarrier."
       ::= { dot3HCStatsEntry 6 }
   --  802.3 Tests
   dot3Tests   OBJECT IDENTIFIER ::= { dot3 6 }
   dot3Errors  OBJECT IDENTIFIER ::= { dot3 7 }
   --  TDR Test
   dot3TestTdr OBJECT-IDENTITY
       STATUS      deprecated
       DESCRIPTION "******** THIS IDENTITY IS DEPRECATED *******
                   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).
                   This object identity has been deprecated, since
                   the ifTestTable in the IF-MIB was deprecated,
                   and there is no longer a standard mechanism for
                   initiating an interface test.  This left no
                   standard way of using this object identity."
       ::= { dot3Tests 1 }
   -- Loopback Test
   dot3TestLoopBack OBJECT-IDENTITY
       STATUS      deprecated
       DESCRIPTION "******** THIS IDENTITY IS DEPRECATED *******
                   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
                   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.
                   This object identity has been deprecated, since
                   the ifTestTable in the IF-MIB was deprecated,
                   and there is no longer a standard mechanism for
                   initiating an interface test.  This left no
                   standard way of using this object identity."
       ::= { dot3Tests 2 }
   dot3ErrorInitError OBJECT-IDENTITY
       STATUS      deprecated
       DESCRIPTION "******** THIS IDENTITY IS DEPRECATED *******
                   Couldn't initialize MAC chip for test.
                   This object identity has been deprecated, since
                   the ifTestTable in the IF-MIB was deprecated,
                   and there is no longer a standard mechanism for
                   initiating an interface test.  This left no
                   standard way of using this object identity."
       ::= { dot3Errors 1 }
   dot3ErrorLoopbackError OBJECT-IDENTITY
       STATUS      deprecated
       DESCRIPTION "******** THIS IDENTITY IS DEPRECATED *******
                   Expected data not received (or not received
                   correctly) in loopback test.
                   This object identity has been deprecated, since
                   the ifTestTable in the IF-MIB was deprecated,
                   and there is no longer a standard mechanism for
                   initiating an interface test.  This left no
                   standard way of using this object identity."
       ::= { dot3Errors 2 }
   -- { dot3 8 }, the dot3ChipSets tree, is defined in RFC2666
   -- conformance information
   etherConformance OBJECT IDENTIFIER ::= { etherMIB 2 }
   etherGroups      OBJECT IDENTIFIER ::= { etherConformance 1 }
   etherCompliances OBJECT IDENTIFIER ::= { etherConformance 2 }
   -- compliance statements
   etherCompliance MODULE-COMPLIANCE
       STATUS      deprecated
       DESCRIPTION "******** THIS COMPLIANCE IS DEPRECATED ********
                   The compliance statement for managed network
                   entities which have ethernet-like network
                   interfaces.
                   This compliance is deprecated and replaced by
                   dot3Compliance."
       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      deprecated
       DESCRIPTION "******** THIS COMPLIANCE IS DEPRECATED ********
                   The compliance statement for managed network
                   entities which have 100 Mb/sec ethernet-like
                   network interfaces.
                   This compliance is deprecated and replaced by
                   dot3Compliance."
       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 }
   dot3Compliance MODULE-COMPLIANCE
       STATUS      deprecated
       DESCRIPTION "******** THIS COMPLIANCE IS DEPRECATED ********
                   The compliance statement for managed network
                   entities which have ethernet-like network
                   interfaces.
                   This compliance is deprecated and replaced by
                   dot3Compliance2."
       MODULE  -- this module
           MANDATORY-GROUPS { etherStatsBaseGroup }
           GROUP       etherDuplexGroup
           DESCRIPTION "This group is mandatory for all
                       ethernet-like network interfaces which are
                       capable of operating in full-duplex mode.
                       It is highly recommended for all
                       ethernet-like network interfaces."
           GROUP       etherStatsLowSpeedGroup
           DESCRIPTION "This group is mandatory for all
                       ethernet-like network interfaces which are
                       capable of operating at 10 Mb/s or slower in
                       half-duplex mode."
           GROUP       etherStatsHighSpeedGroup
           DESCRIPTION "This group is mandatory for all
                       ethernet-like network interfaces which are
                       capable of operating at 100 Mb/s or faster."
           GROUP       etherControlGroup
           DESCRIPTION "This group is mandatory for all
                       ethernet-like network interfaces that
                       support the MAC Control sublayer."
           GROUP       etherControlPauseGroup
           DESCRIPTION "This group is mandatory for all
                       ethernet-like network interfaces that
                       support the MAC Control PAUSE function."
           GROUP       etherCollisionTableGroup
           DESCRIPTION "This group is optional. It is appropriate
                       for all ethernet-like network interfaces
                       which are capable of operating in
                       half-duplex mode and have the necessary
                       metering. Implementation in systems with
                       such interfaces is highly recommended."
       ::= { etherCompliances 3 }
       dot3Compliance2 MODULE-COMPLIANCE
           STATUS      current
           DESCRIPTION "The compliance statement for managed network
                       entities which have ethernet-like network
                       interfaces.
                       Note that compliance with this MIB module
                       requires compliance with the ifCompliance3
                       MODULE-COMPLIANCE statement of the IF-MIB
                       (RFC2863).  In addition, compliance with this
                       MIB module requires compliance  with the
                       mauModIfCompl3 MODULE-COMPLIANCE statement of
                       the MAU-MIB (RFC3636)."
       MODULE  -- this module
           MANDATORY-GROUPS { etherStatsBaseGroup2 }
           GROUP       etherDuplexGroup
           DESCRIPTION "This group is mandatory for all
                       ethernet-like network interfaces which are
                       capable of operating in full-duplex mode.
                       It is highly recommended for all
                       ethernet-like network interfaces."
           GROUP       etherRateControlGroup
           DESCRIPTION "This group is mandatory for all
                       ethernet-like network interfaces which are
                       capable of operating at speeds faster than
                       1000 Mb/s. It is highly recommended for all
                       ethernet-like network interfaces."
           GROUP       etherStatsLowSpeedGroup
           DESCRIPTION "This group is mandatory for all
                       ethernet-like network interfaces which are
                       capable of operating at 10 Mb/s or slower in
                       half-duplex mode."
           GROUP       etherStatsHighSpeedGroup
           DESCRIPTION "This group is mandatory for all
                       ethernet-like network interfaces which are
                       capable of operating at 100 Mb/s or faster."
           GROUP       etherStatsHalfDuplexGroup
           DESCRIPTION "This group is mandatory for all
                       ethernet-like network interfaces which are
                       capable of operating in half-duplex mode."
           GROUP       etherHCStatsGroup
           DESCRIPTION "This group is mandatory for all
                       ethernet-like network interfaces which are
                       capable of operating at 10 Gb/s or faster.
                       It is recommended for all ethernet-like
                       network interfaces which are capable of
                       operating at 1000 Mb/s or faster."
           GROUP       etherControlGroup
           DESCRIPTION "This group is mandatory for all
                       ethernet-like network interfaces that
                       support the MAC Control sublayer."
           GROUP       etherHCControlGroup
           DESCRIPTION "This group is mandatory for all
                       ethernet-like network interfaces that
                       support the MAC Control sublayer and are
                       capable of operating at 10 Gb/s or faster."
           GROUP       etherControlPauseGroup
           DESCRIPTION "This group is mandatory for all
                       ethernet-like network interfaces that
                       support the MAC Control PAUSE function."
           GROUP       etherHCControlPauseGroup
           DESCRIPTION "This group is mandatory for all
                       ethernet-like network interfaces that
                       support the MAC Control PAUSE function and
                       are capable of operating at 10 Gb/s or
                       faster."
           GROUP       etherCollisionTableGroup
           DESCRIPTION "This group is optional. It is appropriate
                       for all ethernet-like network interfaces
                       which are capable of operating in
                       half-duplex mode and have the necessary
                       metering. Implementation in systems with
                       such interfaces is highly recommended."
       ::= { etherCompliances 4 }
   -- units of conformance
   etherStatsGroup OBJECT-GROUP
       OBJECTS     { dot3StatsIndex,
                     dot3StatsAlignmentErrors,
                     dot3StatsFCSErrors,
                     dot3StatsSingleCollisionFrames,
                     dot3StatsMultipleCollisionFrames,
                     dot3StatsSQETestErrors,
                     dot3StatsDeferredTransmissions,
                     dot3StatsLateCollisions,
                     dot3StatsExcessiveCollisions,
                     dot3StatsInternalMacTransmitErrors,
                     dot3StatsCarrierSenseErrors,
                     dot3StatsFrameTooLongs,
                     dot3StatsInternalMacReceiveErrors,
                     dot3StatsEtherChipSet
                   }
       STATUS      deprecated
       DESCRIPTION "********* THIS GROUP IS DEPRECATED **********
                   A collection of objects providing information
                   applicable to all ethernet-like network
                   interfaces.
                   This object group has been deprecated and
                   replaced by etherStatsBaseGroup and
                   etherStatsLowSpeedGroup."
       ::= { 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
       OBJECTS     { dot3StatsIndex,
                     dot3StatsAlignmentErrors,
                     dot3StatsFCSErrors,
                     dot3StatsSingleCollisionFrames,
                     dot3StatsMultipleCollisionFrames,
                     dot3StatsDeferredTransmissions,
                     dot3StatsLateCollisions,
                     dot3StatsExcessiveCollisions,
                     dot3StatsInternalMacTransmitErrors,
                     dot3StatsCarrierSenseErrors,
                     dot3StatsFrameTooLongs,
                     dot3StatsInternalMacReceiveErrors,
                     dot3StatsEtherChipSet,
                     dot3StatsSymbolErrors
                   }
       STATUS      deprecated
       DESCRIPTION "********* THIS GROUP IS DEPRECATED **********
                   A collection of objects providing information
                   applicable to 100 Mb/sec ethernet-like network
                   interfaces.
                   This object group has been deprecated and
                   replaced by etherStatsBaseGroup and
                   etherStatsHighSpeedGroup."
       ::= { etherGroups 3 }
   etherStatsBaseGroup OBJECT-GROUP
       OBJECTS     { dot3StatsIndex,
                     dot3StatsAlignmentErrors,
                     dot3StatsFCSErrors,
                     dot3StatsSingleCollisionFrames,
                     dot3StatsMultipleCollisionFrames,
                     dot3StatsDeferredTransmissions,
                     dot3StatsLateCollisions,
                     dot3StatsExcessiveCollisions,
                     dot3StatsInternalMacTransmitErrors,
                     dot3StatsCarrierSenseErrors,
                     dot3StatsFrameTooLongs,
                     dot3StatsInternalMacReceiveErrors
                   }
       STATUS      deprecated
       DESCRIPTION "********* THIS GROUP IS DEPRECATED **********
                   A collection of objects providing information
                   applicable to all ethernet-like network
                   interfaces.
                   This object group has been deprecated and
                   replaced by etherStatsBaseGroup2 and
                   etherStatsHalfDuplexGroup, to separate
                   objects which must be implemented by all
                   ethernet-like network interfaces from
                   objects that need only be implemented on
                   ethernet-like network interfaces that are
                   capable of half-duplex operation."
       ::= { etherGroups 4 }
   etherStatsLowSpeedGroup OBJECT-GROUP
       OBJECTS     { dot3StatsSQETestErrors }
       STATUS      current
       DESCRIPTION "A collection of objects providing information
                   applicable to ethernet-like network interfaces
                   capable of operating at 10 Mb/s or slower in
                   half-duplex mode."
       ::= { etherGroups 5 }
   etherStatsHighSpeedGroup OBJECT-GROUP
       OBJECTS     { dot3StatsSymbolErrors }
       STATUS      current
       DESCRIPTION "A collection of objects providing information
                   applicable to ethernet-like network interfaces
                   capable of operating at 100 Mb/s or faster."
       ::= { etherGroups 6 }
   etherDuplexGroup OBJECT-GROUP
       OBJECTS     { dot3StatsDuplexStatus }
       STATUS      current
       DESCRIPTION "A collection of objects providing information
                   about the duplex mode of an ethernet-like
                   network interface."
       ::= { etherGroups 7 }
   etherControlGroup OBJECT-GROUP
       OBJECTS     { dot3ControlFunctionsSupported,
                     dot3ControlInUnknownOpcodes
                   }
       STATUS      current
       DESCRIPTION "A collection of objects providing information
                   about the MAC Control sublayer on ethernet-like
                   network interfaces."
       ::= { etherGroups 8 }
   etherControlPauseGroup OBJECT-GROUP
       OBJECTS     { dot3PauseAdminMode,
                     dot3PauseOperMode,
                     dot3InPauseFrames,
                     dot3OutPauseFrames
                   }
       STATUS      current
       DESCRIPTION "A collection of objects providing information
                   about and control of the MAC Control PAUSE
                   function on ethernet-like network interfaces."
       ::= { etherGroups 9 }
   etherStatsBaseGroup2 OBJECT-GROUP
       OBJECTS     { dot3StatsIndex,
                     dot3StatsAlignmentErrors,
                     dot3StatsFCSErrors,
                     dot3StatsInternalMacTransmitErrors,
                     dot3StatsFrameTooLongs,
                     dot3StatsInternalMacReceiveErrors
                   }
       STATUS      current
       DESCRIPTION "A collection of objects providing information
                   applicable to all ethernet-like network
                   interfaces."
       ::= { etherGroups 10 }
   etherStatsHalfDuplexGroup OBJECT-GROUP
       OBJECTS     { dot3StatsSingleCollisionFrames,
                     dot3StatsMultipleCollisionFrames,
                     dot3StatsDeferredTransmissions,
                     dot3StatsLateCollisions,
                     dot3StatsExcessiveCollisions,
                     dot3StatsCarrierSenseErrors
                   }
       STATUS      current
       DESCRIPTION "A collection of objects providing information
                   applicable only to half-duplex ethernet-like
                   network interfaces."
       ::= { etherGroups 11 }
   etherHCStatsGroup OBJECT-GROUP
       OBJECTS     { dot3HCStatsAlignmentErrors,
                     dot3HCStatsFCSErrors,
                     dot3HCStatsInternalMacTransmitErrors,
                     dot3HCStatsFrameTooLongs,
                     dot3HCStatsInternalMacReceiveErrors,
                     dot3HCStatsSymbolErrors
                   }
       STATUS      current
       DESCRIPTION "A collection of objects providing high-capacity
                   statistics applicable to higher-speed
                   ethernet-like network interfaces."
       ::= { etherGroups 12 }
   etherHCControlGroup OBJECT-GROUP
       OBJECTS     { dot3HCControlInUnknownOpcodes }
       STATUS      current
       DESCRIPTION "A collection of objects providing high-capacity
                   statistics for the MAC Control sublayer on
                   higher-speed ethernet-like network interfaces."
       ::= { etherGroups 13 }
   etherHCControlPauseGroup OBJECT-GROUP
       OBJECTS     { dot3HCInPauseFrames,
                     dot3HCOutPauseFrames
                   }
       STATUS      current
       DESCRIPTION "A collection of objects providing high-capacity
                   statistics for the MAC Control PAUSE function on
                   higher-speed ethernet-like network interfaces."
       ::= { etherGroups 14 }
   etherRateControlGroup OBJECT-GROUP
       OBJECTS     { dot3StatsRateControlAbility,
                     dot3StatsRateControlStatus
                   }
       STATUS      current
       DESCRIPTION "A collection of objects providing information
                   about the Rate Control function on ethernet-like
                   interfaces."
       ::= { etherGroups 15 }

END

Intellectual Property Statement

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.

Acknowledgements

This document was produced by the IETF Ethernet Interfaces and Hub MIB Working Group, whose efforts were greatly advanced by the contributions of the following people:

   Ran Atkinson
   Mike Ayers
   Mike Heard
   Jeffrey Johnson
   Lynn Kubinec
   Kam Lam
   Kerry McDonald
   Steve McRobert
   K.C. Norseth
   Dan Romascanu
   Randy Presuhn
   Andrew Smith
   Kaj Tesink
   Geoff Thompson

This document is based on the Proposed Standard Ethernet MIB, RFC 2665 RFC2665, edited by John Flick of Hewlett-Packard and Jeffrey Johnson of RedBack Networks and produced by the Ethernet Interfaces and Hub MIB Working Group. It extends that document by providing support for 10 Gb/s Ethernet interfaces as defined in [IEEE802.3ae].

RFC 2665, in turn, is based on the Proposed Standard Ethernet MIB, RFC 2358 RFC2358, edited by John Flick of Hewlett-Packard and Jeffrey Johnson of RedBack Networks and produced by the 802.3 Hub MIB Working Group. It extends that document by providing support for full-duplex Ethernet interfaces and 1000 Mb/sec Ethernet interfaces as outlined in [IEEE802.3].

RFC 2358, in turn, is almost completely based on both the Standard Ethernet MIB, RFC 1643 RFC1643, and the Proposed Standard Ethernet MIB using the SNMPv2 SMI, RFC 1650 RFC1650, both of which were edited by Frank Kastenholz of FTP Software and produced by the Interfaces MIB Working Group. RFC 2358 extends those documents by providing support for 100 Mb/sec ethernet interfaces.

RFC 1643 and RFC 1650, in turn, are based on the Draft Standard Ethernet MIB, RFC 1398 RFC1398, 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 RFC1284, 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, documented that experience in RFC 1369 RFC1369, 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 [KASTEN]. This document was modestly reworked, initially by the SNMP Working Group, and then 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 RFC 1212 RFC1212 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.

Normative References

RFC2119 Bradner, S., "Key words for use in RFCs to Indicate

             Requirements Levels", BCP 14, RFC 2119, March 1997.

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.

RFC2863 McCloghrie, K. and F. Kastenholz, "The Interfaces Group

             MIB using SMIv2", RFC 2863, June 2000.

[IEEE802.3] IEEE, IEEE Std 802.3, 2002 Edition: "Carrier Sense

             Multiple Access with Collision Detection (CSMA/CD)
             Access Method and Physical Layer Specifications", March
             2002.

[IEEE802.3ae] IEEE, IEEE Std 802.3ae-2002, "Amendment: Media Access

             Control (MAC) Parameters, Physical Layers, and
             Management Parameters for 10 Gb/s Operation", August,
             2002.

RFC3636 Flick, J., "Definitions of Managed Objects for IEEE

             802.3 Medium Attachment Units (MAUs) using SMIv2", RFC
             3636, September 2003.

Informative References

RFC1212 Rose, M. and K. McCloghrie, Editors, "Concise MIB

             Definitions", STD 16, RFC 1212, March 1991.

RFC1213 McCloghrie, K. and M. Rose, Editors, "Management

             Information Base for Network Management of TCP/IP-based
             internets: MIB-II", STD 17, RFC 1213, March 1991.

RFC1284 Cook, J., "Definitions of Managed Objects for

             Ethernet-Like Interface Types", RFC 1284, December
             1991.

RFC1369 Kastenholz, F., "Implementation Notes and Experience

             for The Internet Ethernet MIB", RFC 1369, October 1992.

RFC1398 Kastenholz, F., "Definitions of Managed Objects for the

             Ethernet-like Interface Types", RFC 1398, January 1993.

RFC1643 Kastenholz, F., "Definitions of Managed Objects for the

             Ethernet-like Interface Types", STD 50, RFC 1643, July
             1994.

RFC1650 Kastenholz, F., "Definitions of Managed Objects for the

             Ethernet-like Interface Types using SMIv2", RFC 1650,
             August 1994.

RFC2358 Flick, J. and J. Johnson, "Definitions of Managed

             Objects for the Ethernet-like Interface Types", RFC
             2358, June 1998.

RFC2665 Flick, J. and J. Johnson, "Definitions of Managed

             Objects for the Ethernet-like Interface Types", RFC
             2665, August 1999.

RFC2666 Flick, J., "Definitions of Object Identifiers for

             Identifying Ethernet Chip Sets", RFC 2666, August 1999.

RFC3410 Case, J., Mundy, R., Partain, D. and B. Stewart,

             "Introduction and Applicability Statements for
             Internet-Standard Network Management Framework", RFC
             3410, December 2002.

[CASE] Case, J., and C. Partridge, "Case Diagrams: A First

             Step to Diagrammed Management Information Bases",
             Computer Communications Review, 19(1):13-16, January
             1989.

RFC3637 Heard, C., "Definitions of Managed Objects for the

             Ethernet WAN Interface Sublayer", RFC 3637, September
             2003.

[KASTEN] Kastenholz, F., "IEEE 802.3 Layer Management Draft

             compatible MIB for TCP/IP Networks", electronic mail
             message to [email protected], 9 June 1989.

Security Considerations

There is one management object defined in this MIB that has a MAX- ACCESS clause of read-write. That object, dot3PauseAdminMode, may be used to change the flow control configuration on a network interface, which may result in dropped packets, or sending flow control packets on links where the link partner will not understand them. Either action could be detrimental to network performance.

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 can have a negative effect on network operations.

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. In particular, the dot3StatsEtherChipSet object may be considered sensitive in many environments, since it would allow an intruder to obtain information about which vendor's equipment is in use on the network. Note that this object has been deprecated. However, some implementors may still choose to implement it for backwards compatability.

Most of the objects in this MIB module contain statistical information about particular network links. In some network environments, this information may be considered sensitive.

It is thus important to control even GET and/or NOTIFY access to these objects and possibly to even encrypt the values of these objects 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 the implementors 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).

Furthermore, 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.

10. IANA Considerations

This document does not define any new name space to be administered by IANA. However, section 3.2.4 does specify that some of the defined values in a current IANA-maintained name space are to be marked as deprecated or obsolete. In particular, the following enumerated values in the IANAifType TEXTUAL-CONVENTION in the IANAifType-MIB module have had an ASN.1 comment added by IANA stating that they have been deprecated:

   - iso88032Csmacd(7)
   - starLan(11)

In addition, the following enumerated values have had an ASN.1 comment added by IANA stating that they are obsolete:

   - fastEther(62)
   - fastEtherFX(69)
   - gigabitEthernet(117)

In all of the above cases, the ASN.1 comment indicates that ethernetCsmacd(6) should be used instead of these values.

A. Change Log

A.1. Changes since RFC 2665

This section enumerates changes made to RFC 2665 to produce this document.

  (1)   Updated references to the IEEE 802.3 standard to
        refer to the 2002 edition.
  (2)   Added reference to IEEE 802.3ae-2002.
  (3)   Updated WG e-mail address.
  (4)   The following DESCRIPTION clauses have been updated
        to reflect behaviour on 10 Gb/s interfaces:
        dot3StatsAlignmentErrors and dot3StatsSymbolErrors.
  (5)   The following objects have been added for management
        of the Rate Control function in WAN applications of
        ethernet:  dot3StatsRateControlAbility and
        dot3StatsRateControlStatus.
  (6)   The following 64-bit counters have been added to
        support operation on high-speed ethernet interfaces:
        dot3HCControlInUnknownOpcodes, dot3HCInPauseFrames,
        dot3HCOutPauseFrames, dot3HCStatsAlignmentErrors,
        dot3HCStatsFCSErrors, dot3HCStatsFrameTooLongs,
        dot3HCStatsInternalMacTransmitErrors,
        dot3HCStatsInternalMacReceiveErrors,
        dot3HCStatsSymbolErrors
  (7)   Object groups and compliances have been added to
        contain the new objects.
  (8)   The MODULE-IDENTITY clause has been updated to
        reflect the changes in the MIB module.
  (9)   Use of the various ifType values for ethernet has
        been clarified to emphasize that all ethernet-like
        interfaces must use the ethernetCsmacd ifType.
  (10)  Several clarifications were made to the section on
        the mapping of the Interface MIB objects to ethernet.
  (11)  MIB boilerplate in section 2 has been updated to the
        latest approved text.

A.2. Changes between RFC 2358 and RFC 2665

This section enumerates changes made to RFC 2358 to produce RFC 2665.

  (1)   Section 2 has been replaced with the current SNMP
        Management Framework boilerplate.
  (2)   The ifMtu mapping has been clarified.
  (3)   The relationship between the IEEE 802.3 octet counters
        and the IF-MIB octet counters has been clarified.
  (4)   REFERENCE clauses have been updated to reflect the
        actual IEEE 802.3 managed object that each MIB object
        is based on.
  (5)   The following object DESCRIPTION clauses have been
        updated to reflect that they do not increment in
        full-duplex mode: dot3StatsSingleCollisionFrames,
        dot3StatsMultipleCollisionFrames, dot3StatsSQETestErrors,
        dot3StatsDeferredTransmissions, dot3StatsLateCollisions,
        dot3StatsExcessiveCollisions, dot3StatsCarrierSenseErrors,
        dot3CollFrequencies.
  (6)   The following object DESCRIPTION clauses have been
        updated to reflect behaviour on full-duplex and
        1000 Mb/s interfaces: dot3StatsAlignmentErrors,
        dot3StatsFCSErrors, dot3StatsSQETestErrors,
        dot3StatsLateCollisions, dot3StatsSymbolErrors.
  (7)   Two new tables, dot3ControlTable and dot3PauseTable,
        have been added.
  (8)   A new object, dot3StatsDuplexStatus, has been added.
  (9)   The object groups and compliances have been restructured.
  (10)  The dot3StatsEtherChipSet object has been deprecated.
  (11)  The dot3ChipSets have been moved to a separate document.

A.3. Changes between RFC 1650 and RFC 2358

This section enumerates changes made to RFC 1650 to produce RFC 2358.

  (1)   The MODULE-IDENTITY has been updated to reflect the changes
        in the MIB.
  (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)  Converted the dot3Tests, dot3Errors, and dot3ChipSets
        OIDs to use the OBJECT-IDENTITY macro.
  (12)  Added to the list of registered dot3ChipSets.
  (13)  An intellectual property notice and copyright notice
        were added, as required by RFC 2026.

Author's Address

John Flick Hewlett-Packard Company 8000 Foothills Blvd. M/S 5557 Roseville, CA 95747-5557

Phone: +1 916 785 4018 EMail: [email protected]

Full Copyright Statement

Copyright (C) The Internet Society (2003). All Rights Reserved.

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 assignees.

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.

Acknowledgement

Funding for the RFC Editor function is currently provided by the Internet Society.