Definitions of Managed Objects for the Ethernet-like Interface Types
RFC 3635
| Document | Type |
RFC - Proposed Standard
(October 2003; No errata)
Obsoletes RFC 2665
|
|
|---|---|---|---|
| Author | John Flick | ||
| Last updated | 2015-10-14 | ||
| Stream | Internet Engineering Task Force (IETF) | ||
| Formats | plain text html pdf htmlized bibtex | ||
| Stream | WG state | WG Document | |
| Document shepherd | No shepherd assigned | ||
| IESG | IESG state | RFC 3635 (Proposed Standard) | |
| Action Holders |
(None)
|
||
| Consensus Boilerplate | Unknown | ||
| Telechat date | |||
| Responsible AD | Bert Wijnen | ||
| IESG note |
Requested to go on IESG agenda on June 12th Responsible: bwijnen/iesg |
||
| Send notices to | (None) | ||
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.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 2
2. The Internet-Standard Management Framework . . . . . . . . . . 3
3. Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
3.1. Relation to MIB-2. . . . . . . . . . . . . . . . . . . . 4
3.2. Relation to the Interfaces MIB . . . . . . . . . . . . . 4
3.2.1. Layering Model . . . . . . . . . . . . . . . . . 4
3.2.2. Virtual Circuits . . . . . . . . . . . . . . . . 4
3.2.3. ifRcvAddressTable. . . . . . . . . . . . . . . . 5
3.2.4. ifType . . . . . . . . . . . . . . . . . . . . . 5
3.2.5. ifXxxOctets. . . . . . . . . . . . . . . . . . . 5
3.2.6. ifXxxXcastPkts . . . . . . . . . . . . . . . . . 6
3.2.7. ifMtu. . . . . . . . . . . . . . . . . . . . . . 8
3.2.8. ifSpeed and ifHighSpeed. . . . . . . . . . . . . 8
3.2.9. ifPhysAddress. . . . . . . . . . . . . . . . . . 9
3.2.10. Specific Interface MIB Objects. . . . . . . . . 10
3.3. Relation to the 802.3 MAU MIB. . . . . . . . . . . . . . 13
Flick Standards Track [Page 1]
RFC 3635 Ethernet-Like MIB September 2003
3.4. dot3StatsEtherChipSet. . . . . . . . . . . . . . . . . . 13
3.5. Mapping of IEEE 802.3 Managed Objects. . . . . . . . . . 14
4. Definitions. . . . . . . . . . . . . . . . . . . . . . . . . . 17
5. Intellectual Property Statement. . . . . . . . . . . . . . . . 55
6. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 56
7. Normative References . . . . . . . . . . . . . . . . . . . . . 57
8. Informative References . . . . . . . . . . . . . . . . . . . . 58
9. Security Considerations. . . . . . . . . . . . . . . . . . . . 59
10. IANA Considerations. . . . . . . . . . . . . . . . . . . . . . 60
A. Change Log . . . . . . . . . . . . . . . . . . . . . . . . . . 61
A.1. Changes since RFC 2665 . . . . . . . . . . . . . . . . . 61
A.2. Changes between RFC 2358 and RFC 2665 . . . . . . . . . 62
A.3. Changes between RFC 1650 and RFC 2358. . . . . . . . . . 62
Author's Address . . . . . . . . . . . . . . . . . . . . . . . . . 63
Full Copyright Statement . . . . . . . . . . . . . . . . . . . . .64
1. Introduction
This memo defines a portion of the Management Information Base (MIB)
for use with network management protocols in the Internet community.
In particular, it defines objects for managing Ethernet-like
interfaces.
This memo also includes a MIB module. This MIB module 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].
Flick Standards Track [Page 2]
RFC 3635 Ethernet-Like MIB September 2003
2. The Internet-Standard Management Framework
For a detailed overview of the documents that describe the current
Internet-Standard Management Framework, please refer to section 7 of
RFC 3410 [RFC3410].
Managed objects are accessed via a virtual information store, termed
the Management Information Base or MIB. MIB objects are generally
accessed through the Simple Network Management Protocol (SNMP).
Objects in the MIB are defined using the mechanisms defined in the
Structure of Management Information (SMI). This memo specifies a MIB
module that is compliant to the SMIv2, which is described in STD 58,
RFC 2578 [RFC2578], STD 58, RFC 2579 [RFC2579] and STD 58, RFC 2580
[RFC2580].
3. Overview
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.
Flick Standards Track [Page 3]
RFC 3635 Ethernet-Like MIB September 2003
3.1. 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 }
3.2. 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.
3.2.1. 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.
3.2.2. Virtual Circuits
This medium does not support virtual circuits and this area is not
applicable to this MIB.
Flick Standards Track [Page 4]
RFC 3635 Ethernet-Like MIB September 2003
3.2.3. 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.
3.2.4. 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.
3.2.5. 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
Flick Standards Track [Page 5]
RFC 3635 Ethernet-Like MIB September 2003
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.
3.2.6. 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
Flick Standards Track [Page 6]
RFC 3635 Ethernet-Like MIB September 2003
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.
Flick Standards Track [Page 7]
RFC 3635 Ethernet-Like MIB September 2003
layer above
--------------------------------------------------------------------
ifInUcastPkts+ ^ | ifOutUcastPkts+
ifInBroadcastPkts+ ----|---- ----|---- ifOutBroadcastPkts+
ifInMulticastPkts | | ifOutMulticastPkts
| |
dot3InPauseFrames <---| |<--- dot3OutPauseFrames
| |
ifInDiscards <---| |
| |
ifInUnknownProtos <---| |---> ifOutDiscards
| |
ifInOctets ----|---- ----|---- ifOutOctets
| |
ifInErrors <---| |---> ifOutErrors
| V
--------------------------------------------------------------------
layer below
3.2.7. 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.
3.2.8. 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
Flick Standards Track [Page 8]
RFC 3635 Ethernet-Like MIB September 2003
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].
3.2.9. 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.
Flick Standards Track [Page 9]
RFC 3635 Ethernet-Like MIB September 2003
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.
Flick Standards Track [Page 10]
RFC 3635 Ethernet-Like MIB September 2003
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.
Flick Standards Track [Page 11]
RFC 3635 Ethernet-Like MIB September 2003
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].
Flick Standards Track [Page 12]
RFC 3635 Ethernet-Like MIB September 2003
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
3.3. 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.
3.4. 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.
Flick Standards Track [Page 13]
RFC 3635 Ethernet-Like MIB September 2003
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.
3.5. 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
Flick Standards Track [Page 14]
RFC 3635 Ethernet-Like MIB September 2003
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.
Flick Standards Track [Page 15]
RFC 3635 Ethernet-Like MIB September 2003
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.
Flick Standards Track [Page 16]
RFC 3635 Ethernet-Like MIB September 2003
4. 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: hubmib@ietf.org
To subscribe: hubmib-request@ietf.org
Chair: Dan Romascanu
Postal: Avaya Inc.
Atidum Technology Park, Bldg. 3
Tel Aviv 61131
Israel
Tel: +972 3 645 8414
E-mail: dromasca@avaya.com
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: johnf@rose.hp.com"
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
Flick Standards Track [Page 17]
RFC 3635 Ethernet-Like MIB September 2003
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
Flick Standards Track [Page 18]
RFC 3635 Ethernet-Like MIB September 2003
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 {
Flick Standards Track [Page 19]
RFC 3635 Ethernet-Like MIB September 2003
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
Flick Standards Track [Page 20]
RFC 3635 Ethernet-Like MIB September 2003
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
Flick Standards Track [Page 21]
RFC 3635 Ethernet-Like MIB September 2003
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
Flick Standards Track [Page 22]
RFC 3635 Ethernet-Like MIB September 2003
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
Flick Standards Track [Page 23]
RFC 3635 Ethernet-Like MIB September 2003
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
Flick Standards Track [Page 24]
RFC 3635 Ethernet-Like MIB September 2003
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
Flick Standards Track [Page 25]
RFC 3635 Ethernet-Like MIB September 2003
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,
Flick Standards Track [Page 26]
RFC 3635 Ethernet-Like MIB September 2003
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
Flick Standards Track [Page 27]
RFC 3635 Ethernet-Like MIB September 2003
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."
Flick Standards Track [Page 28]
RFC 3635 Ethernet-Like MIB September 2003
::= { 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
Flick Standards Track [Page 29]
RFC 3635 Ethernet-Like MIB September 2003
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 }
Flick Standards Track [Page 30]
RFC 3635 Ethernet-Like MIB September 2003
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
Flick Standards Track [Page 31]
RFC 3635 Ethernet-Like MIB September 2003
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
Flick Standards Track [Page 32]
RFC 3635 Ethernet-Like MIB September 2003
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."
Flick Standards Track [Page 33]
RFC 3635 Ethernet-Like MIB September 2003
::= { 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 }
Flick Standards Track [Page 34]
RFC 3635 Ethernet-Like MIB September 2003
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)
}
Flick Standards Track [Page 35]
RFC 3635 Ethernet-Like MIB September 2003
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
Flick Standards Track [Page 36]
RFC 3635 Ethernet-Like MIB September 2003
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
Flick Standards Track [Page 37]
RFC 3635 Ethernet-Like MIB September 2003
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 }
Flick Standards Track [Page 38]
RFC 3635 Ethernet-Like MIB September 2003
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
Flick Standards Track [Page 39]
RFC 3635 Ethernet-Like MIB September 2003
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
Flick Standards Track [Page 40]
RFC 3635 Ethernet-Like MIB September 2003
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
Flick Standards Track [Page 41]
RFC 3635 Ethernet-Like MIB September 2003
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
Flick Standards Track [Page 42]
RFC 3635 Ethernet-Like MIB September 2003
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.
Flick Standards Track [Page 43]
RFC 3635 Ethernet-Like MIB September 2003
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 }
Flick Standards Track [Page 44]
RFC 3635 Ethernet-Like MIB September 2003
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
Flick Standards Track [Page 45]
RFC 3635 Ethernet-Like MIB September 2003
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
Flick Standards Track [Page 46]
RFC 3635 Ethernet-Like MIB September 2003
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 }
Flick Standards Track [Page 47]
RFC 3635 Ethernet-Like MIB September 2003
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
Flick Standards Track [Page 48]
RFC 3635 Ethernet-Like MIB September 2003
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
Flick Standards Track [Page 49]
RFC 3635 Ethernet-Like MIB September 2003
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,
Flick Standards Track [Page 50]
RFC 3635 Ethernet-Like MIB September 2003
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
Flick Standards Track [Page 51]
RFC 3635 Ethernet-Like MIB September 2003
}
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
Flick Standards Track [Page 52]
RFC 3635 Ethernet-Like MIB September 2003
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,
Flick Standards Track [Page 53]
RFC 3635 Ethernet-Like MIB September 2003
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
Flick Standards Track [Page 54]
RFC 3635 Ethernet-Like MIB September 2003
}
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
5. 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.
Flick Standards Track [Page 55]
RFC 3635 Ethernet-Like MIB September 2003
6. 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.
Flick Standards Track [Page 56]
RFC 3635 Ethernet-Like MIB September 2003
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.
7. 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.
Flick Standards Track [Page 57]
RFC 3635 Ethernet-Like MIB September 2003
[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.
8. 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.
Flick Standards Track [Page 58]
RFC 3635 Ethernet-Like MIB September 2003
[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 mib-wg@nnsc.nsf.net, 9 June 1989.
9. 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.
Flick Standards Track [Page 59]
RFC 3635 Ethernet-Like MIB September 2003
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.
Flick Standards Track [Page 60]
RFC 3635 Ethernet-Like MIB September 2003
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.
Flick Standards Track [Page 61]
RFC 3635 Ethernet-Like MIB September 2003
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.
Flick Standards Track [Page 62]
RFC 3635 Ethernet-Like MIB September 2003
(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: johnf@rose.hp.com
Flick Standards Track [Page 63]
RFC 3635 Ethernet-Like MIB September 2003
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.
Flick Standards Track [Page 64]