Internet Draft IEEE 802.12 Interface MIB November 10 1995
Definitions of Managed Objects for IEEE 802.12 Interfaces
November 10, 1995
John Flick
Hewlett Packard Company
8000 Foothills Blvd. M/S 5556
Roseville, CA 95747-5556
johnf@hprnd.rose.hp.com
<draft-ietf-vgmib-interfaces-mib-04.txt>
Status of this Memo
This document is an Internet-Draft. Internet-Drafts are working
documents of the Internet Engineering Task Force (IETF), its areas,
and its working groups. Note that other groups may also distribute
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Internet-Drafts are draft documents valid for a maximum of six months
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To learn the current status of any Internet-Draft, please check the
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ftp.isi.edu (US West Coast).
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1. Abstract
This memo defines an experimental portion of the Management
Information Base (MIB) for use with network management protocols in
TCP/IP-based internets. In particular, it defines objects for
managing network interfaces based on IEEE 802.12.
2. Object Definitions
Management information is viewed as a collection of managed objects,
residing in a virtual information store, termed the Management
Information Base (MIB). Collections of related objects are defined
in MIB modules. MIB modules are written using a subset of Abstract
Syntax Notation One (ASN.1) [1] termed the Structure of Management
Information (SMI) [2]. In particular, each object type is named by
an OBJECT IDENTIFIER, an administratively assigned name. The object
type together with an object instance serves to uniquely identify a
specific instantiation of the object. For human convenience, we
often use a textual string, termed the descriptor, to refer to the
object type.
3. Overview
Instances of these object types represent attributes of an interface
to a 100VG-AnyLAN communications medium. At present, 100VG-AnyLAN
media are identified by one value of the ifType object in the
Internet-standard MIB:
ieee80212(55)
For this interface, the value of the ifSpecific variable in the MIB-
II [5] has the OBJECT IDENTIFIER value:
dot12MIB OBJECT IDENTIFIER ::= { experimental 63 }
The definitions presented here are based on the IEEE Standard 802.12,
[6] Clause 13 "Layer Management Functions And Services", and Annex E
"GDMO Specifications for Demand Priority Managed Objects".
Implementors of these MIB objects should note that the IEEE document
explicitly describes (in the form of Pascal pseudocode) when, where,
and how various MAC 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 [6] are
represented by previously defined objects in the Internet-standard
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MIB [5] or in the Evolution of the Interfaces Group of MIB-II [7],
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 MAC address of an interface, and multicast
information associated with an interface.
3.1. MAC Addresses
All representations of MAC addresses in this MIB module, and in other
related MIB modules (like RFC 1573), are in "canonical" order defined
by 802.1a, i.e., as if it were transmitted least significant bit
first. This is true even if the interface is operating in token ring
framing mode, which requires MAC addresses to be transmitted most
significant bit first.
3.2. Relation to RFC 1213
This section applies only when this MIB is used in conjunction with
the "old" (i.e., pre-RFC 1573) interface group.
The relationship between a 100VG-AnyLAN interface and an interface in
the context of the Internet-standard MIB is one-to-one. As such, the
value of an ifIndex object instance can be directly used to identify
corresponding instances of the objects defined herein.
3.3. Relation to RFC 1573
RFC 1573, the Interface MIB Evolution, requires that any MIB which is
an adjunct of the Interface MIB, clarify specific areas within the
Interface MIB. These areas are intentionally left vague in RFC 1573
to avoid over constraining the MIB, thereby precluding management of
certain media-types.
An agent which implements this MIB module must support the
ifGeneralGroup, ifStackGroup, ifHCPacketGroup, and ifRcvAddressGroup
of RFC 1573.
Section 3.3 of RFC 1573 enumerates several areas which a media-
specific MIB must clarify. In addition, there are some objects in
RFC 1573 for which additional clarification of how to apply them to a
100VG-AnyLAN interface would be helpful. Each of these areas is
addressed in a following subsection. The implementor is referred to
RFC 1573 in order to understand the general intent of these areas.
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3.3.1. Layering Model
For the typical usage of this MIB module, there will be no sub-layers
"above" or "below" the 802.12 Interface. However, this MIB module
does not preclude such layering.
3.3.2. Virtual Circuits
This medium does not support virtual circuits and this area is not
applicable to this MIB.
3.3.3. ifTestTable
This MIB does not define any tests for media instrumented by this
MIB. Implementation of the ifTestTable is not required. An
implementation may optionally implement the ifTestTable to execute
vendor specific tests.
3.3.4. ifRcvAddressTable
This table contains all IEEE addresses, unicast, multicast, and
broadcast, for which this interface will receive packets and forward
them up to a higher layer entity for consumption. In addition, when
the interface is using 802.5 framing mode, the ifRcvAddressTable will
contain the functional address mask.
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.
3.3.5. ifPhysAddress
This object contains the IEEE 802.12 address which is placed in the
source-address field of any 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 choose, use of the factory-provided ROM
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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. This is true even
when the interface is using token ring framing mode, which transmits
addresses high-order bit first.
3.3.6. Specific Interface MIB Objects
The following table provides specific implementation guidelines for
the interface group objects in the conformance groups listed above.
Object Use for an 802.12 Interface
ifIndex Each 802.12 interface is represented by an
ifEntry. Interface tables in this MIB
module are indexed by ifIndex.
ifDescr Interface description.
ifType The IANA reserved value for 802.12 - 55.
ifMtu The value of ifMtu on an 802.12 interface
will depend on the type of framing that is
in use on that interface. Changing the
dot12DesiredFramingType may have the effect
of changing ifMtu after the next time that
the interface trains. When
dot12CurrentFramingType is equal to
frameType88023, ifMtu will be equal to
1500. When dot12CurrentFramingType is
equal to frameType88025, ifMtu will be
4464.
ifSpeed The speed of the interface in bits per
second. For current 802.12
implementations, this will be equal to
100,000,000 (100 million).
ifPhysAddress See Section 3.3.5.
ifAdminStatus Write access is not required. Support for
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'testing' is not required. Setting this
object to 'up' will cause dot12Commands to
be set to 'open'. Setting this object to
'down' will cause dot12Commands to be set
to 'close'. Setting dot12Commands to
'open' will set this object to 'up'.
Setting dot12Commands to 'close' will set
this object to 'down'. Setting
dot12Commands to 'reset' will have no
effect on this object.
ifOperStatus When dot12Status is equal to 'opened', this
object will be equal to 'up'. When
dot12Status is equal to 'closed', 'opening',
'openFailure' or 'linkFailure', this object
will be equal to 'down'. Support for
'testing' is not required, but may be used
to indicate that a vendor specific test is
in progress. The value 'dormant' has no
meaning for an IEEE 802.12 interface.
ifLastChange Refer to [7].
ifInOctets The number of octets in valid MAC frames
received on this interface, including the
MAC header and FCS.
ifInUcastPkts Refer to [7].
ifInDiscards Refer to [7].
ifInErrors The sum for this interface of
dot12InIPMErrors,
dot12InOversizeFrameErrors,
dot12InDataErrors, and any additional
internal errors that may occur in an
implementation.
ifInUnknownProtos Refer to [7].
ifOutOctets The number of octets transmitted in MAC
frames on this interface, including the MAC
header and FCS.
ifOutUcastPkts Refer to [7].
ifOutDiscards Refer to [7].
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ifOutErrors The number of implementation-specific
internal transmit errors on this interface.
ifName Locally-significant textual name for the
interface (e.g. vg0).
ifInMulticastPkts Refer to [7]. When dot12CurrentFramingType
is frameType88025, this count includes
packets addressed to functional addresses.
ifInBroadcastPkts Refer to [7].
ifOutMulticastPkts Refer to [7]. When dot12CurrentFramingType
is frameType88025, this count includes
packets addressed to functional addresses.
ifOutBroadcastPkts Refer to [7].
ifHCInOctets 64-bit version of ifInOctets.
ifHCOutOctets 64-bit version of ifOutOctets
ifHC*Pkts Not required for 100 MBit interfaces.
Future IEEE 802.12 interfaces which operate
at higher speeds may require implemenation
of these counters, but such interfaces are
beyond the scope of this memo.
ifLinkUpDownTrapEnable Refer to [7]. Default is 'enabled'.
ifHighSpeed The speed of the interface in millions of
bits per second. For current 802.12
implementations, this will be equal to 100.
ifPromiscuousMode Reflects whether the interface has
successfully trained and is currently
operating in promiscuous mode.
dot12DesiredPromiscStatus is used to select
the promiscuous mode to be requested in the
next training attempt. Setting
ifPromiscuousMode will update
dot12DesiredPromiscStatus and cause the
interface to attempt to retrain using the
new promiscuous mode. After the interface
has retrained, ifPromiscuousMode will
reflect the mode that is in use, not the
mode that was requested.
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ifConnectorPresent This will normally be 'true'.
ifStackHigherLayer Refer to section 3.3.1
ifStackLowerLayer
ifStackStatus
ifRcvAddressAddress Refer to section 3.3.4.
ifRcvAddressStatus
ifRcvAddressType
3.4. Relation to RFC 1749
When an IEEE 802.12 interface is operating in token ring framing
mode, and the end node supports token ring source routing, the agent
should implement RFC 1749, the IEEE 802.5 Station Source Routing MIB
[8] for those interfaces.
3.5. Master Mode Operation
In a 100VG-AnyLAN network, "master" devices act as network
controllers to decide when to grant requesting end-nodes permission
to transmit. These master devices may be repeaters, or other active
controller devices such as switches.
Devices which do not act as network controllers, such as end-nodes or
passive switches, are considered to be operating in "slave" mode.
The dot12ControlMode object indicates if the interface is operating
in master mode or slave mode.
3.6. Normal and High Priority Counters
The 100VG-AnyLAN interface MIB does not provide normal priority
transmit counters. Standardization of normal priority transmit
counters could not be justified -- ifOutUcastPkts,
ifOutMulticastPkts, ifOutBroadcastPkts, ifOutOctets,
dot12OutHighPriorityFrames, and dot12OutHighPriorityOctets should
suffice. More precisely, the number of normal priority frames
transmitted can be calculated as:
outNormPriorityFrames = ifOutUcastPkts +
ifOutMulticastPkts +
ifOutBroadcastPkts -
dot12OutHighPriorityFrames
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The number of normal priority octets transmitted can be calculated
as:
outNormPriorityOctets = ifOutOctets -
dot12OutHighPriorityOctets
On the other hand, normal priority receive counters are provided.
The main reason for this is that the normal priority and high
priority counters include errored frames, whereas the ifIn*Pkts and
ifInOctets do not include errored frames. dot12InNormPriorityFrames
could be calculated, but the calculation is tedious:
inNormPriorityFrames = ifInUcastPkts +
ifInMulticastPkts +
ifInBroadcastPkts +
dot12InNullAddressedFrames +
ifInErrors +
ifInDiscards +
ifInUnknownProtos -
dot12InHighPriorityFrames
dot12InNormPriorityOctets includes octets in unreadable frames, which
is not available elsewhere. The number of octets in unreadable
frames can be calculated as:
octetsInUnreadableFrames = dot12InNormPriorityOctets +
dot12InHighPriorityOctets -
ifInOctets
Also, the total bandwidth utilization by this interface can be
calculated as:
utilization = dot12InNormPriorityOctets +
dot12InHighPriorityOctets +
ifOutOctets
In other words, the normal priority receive counters were deemed
useful, whereas the normal priority transmit counters can be easily
calculated from other available counters.
3.7. Mapping of IEEE 802.12 Managed Objects
The following table lists all the managed objects defined for
oEndNode in the IEEE 802.12 Standard, and the corresponding SNMP
objects.
IEEE 802.12 Managed Object Corresponding SNMP Object
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oEndNode
.aBroadcastFramesReceived IF-MIB - ifInBroadcastPkts
.aBroadcastFramesTransmitted IF-MIB - ifOutBroadcastPkts
.aDataErrorFramesReceived dot12InDataErrors
.aDesiredFramingType dot12DesiredFramingType
.aDesiredPromiscuousStatus dot12DesiredPromiscStatus
.aFramesTransmitted IF-MIB - ifOutUCastPkts +
ifOutMulticastPkts +
ifOutBroadcastPkts
.aFramingCapability dot12FramingCapability
.aFunctionalAddresses IF-MIB - ifRcvAddressTable
.aHighPriorityFramesReceived dot12InHighPriorityFrames
.aHighPriorityFramesTransmitted dot12OutHighPriorityFrames
.aHighPriorityOctetsReceived dot12InHighPriorityOctets or
dot12InHCHighPriorityOctets
.aHighPriorityOctetsTransmitted dot12OutHighPriorityOctets or
dot12OutHCHighPriorityOctets
.aIPMFramesReceived dot12InIPMErrors
.aLastTrainingConfig dot12LastTrainingConfig
.aMACID IF-MIB - ifIndex
.aMACStatus dot12Status
.aMACVersion dot12TrainingVersion
.aMediaType <not yet mapped>
Tranceiver MIB issue
.aMulticastFramesReceived IF-MIB - ifInMulticastPkts
.aMulticastFramesTransmitted IF-MIB - ifOutMulticastPkts
.aMulticastReceiveStatus IF-MIB - ifRcvAddressTable
.aNormalPriorityFramesReceived dot12InNormPriorityFrames
.aNormalPriorityOctetsReceived dot12InNormPriorityOctets or
dot12InHCNormPriorityOctets
.aNullAddressedFramesReceived dot12InNullAddressedFrames
.aOctetsTransmitted IF-MIB - ifOutOctets or
ifHCOutOctets
.aOversizeFramesReceived dot12InOversizeFrameErrors
.aReadableFramesReceived IF-MIB - ifInUcastPkts +
ifInMulticastPkts +
ifInBroadcastPkts
.aReadableOctetsReceived IF-MIB - ifInOctets or
ifHCInOctets
.aReadMulticastList IF-MIB - ifRcvAddressTable
.aReadWriteMACAddress IF-MIB - ifPhysAddress
.aTransitionsIntoTraining dot12TransitionIntoTrainings
.acAddGroupAddress IF-MIB - ifRcvAddressTable
.acClose dot12Commands: 'close'
.acDeleteGroupAddress IF-MIB - ifRcvAddressTable
.acExecuteSelftest IF-MIB - ifAdminStatus
.acInitializeMAC dot12Commands: 'reset'
.acOpen dot12Commands: 'open'
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4. Definitions
DOT12-IF-MIB DEFINITIONS ::= BEGIN
IMPORTS
experimental, Counter32, Counter64, OBJECT-TYPE,
MODULE-IDENTITY
FROM SNMPv2-SMI
MODULE-COMPLIANCE, OBJECT-GROUP
FROM SNMPv2-CONF
ifIndex
FROM IF-MIB;
dot12MIB MODULE-IDENTITY
LAST-UPDATED "9511072032Z"
ORGANIZATION "IETF 100VG-AnyLAN MIB Working Group"
CONTACT-INFO
" John Flick
Postal: Hewlett Packard Company
8000 Foothills Blvd. M/S 5556
Roseville, CA 95747-5556
Tel: +1 916 785 4018
Fax: +1 916 785 3583
E-mail: johnf@hprnd.rose.hp.com"
DESCRIPTION
"This MIB module describes objects for
managing 100VG-AnyLAN interfaces."
::= { experimental 63 }
-- move to { transmission 55 }
dot12MIBObjects OBJECT IDENTIFIER ::= { dot12MIB 1 }
dot12ConfigTable OBJECT-TYPE
SYNTAX SEQUENCE OF Dot12ConfigEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"Configuration information for a collection of
802.12 interfaces attached to a particular
system."
::= { dot12MIBObjects 1 }
dot12ConfigEntry OBJECT-TYPE
SYNTAX Dot12ConfigEntry
MAX-ACCESS not-accessible
STATUS current
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DESCRIPTION
"Configuration for a particular interface to an
802.12 medium."
INDEX { ifIndex }
::= { dot12ConfigTable 1 }
Dot12ConfigEntry ::=
SEQUENCE {
dot12DesiredFramingType INTEGER,
dot12FramingCapability INTEGER,
dot12DesiredPromiscStatus INTEGER,
dot12TrainingVersion INTEGER,
dot12LastTrainingConfig OCTET STRING,
dot12Commands INTEGER,
dot12Status INTEGER,
dot12CurrentFramingType INTEGER,
dot12ControlMode INTEGER
}
dot12DesiredFramingType OBJECT-TYPE
SYNTAX INTEGER {
frameType88023(1),
frameType88025(2),
frameTypeEither(3)
}
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"The type of framing which will be requested by
the interface during the next interface MAC
initialization or open action.
In master mode, this is the framing mode which
will be granted by the interface. Note that
for a master mode interface, this object must be
equal to 'frameType88023' or 'frameType88025',
since a master mode interface cannot grant
'frameTypeEither'."
REFERENCE
"IEEE 802.12, Layer Management, 13.2.5.2.1,
aDesiredFramingType."
::= { dot12ConfigEntry 1 }
dot12FramingCapability OBJECT-TYPE
SYNTAX INTEGER {
frameType88023(1),
frameType88025(2),
frameTypeEither(3)
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}
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The type of framing this interface is capable of
supporting."
REFERENCE
"IEEE 802.12, Layer Management, 13.2.5.2.1,
aFramingCapability."
::= { dot12ConfigEntry 2 }
dot12DesiredPromiscStatus OBJECT-TYPE
SYNTAX INTEGER {
singleAddressMode(1),
promiscuousMode(2)
}
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"This object is used to select the promiscuous
mode that this interface will request in the next
training packet issued on this interface.
Whether the repeater grants the requested mode
must be verified by examining the state of the PP
bits in the corresponding instance of
dot12LastTrainingConfig.
In master mode, this object controls whether or
not promiscuous mode will be granted by the
interface when requested by the lower level
device.
Note that this object indicates the desired mode
for the next time the interface trains. The
currently active mode will be reflected in
dot12LastTrainingConfig and in ifPromiscuousMode."
REFERENCE
"IEEE 802.12, Layer Management, 13.2.5.2.1,
aDesiredPromiscuousStatus."
::= { dot12ConfigEntry 3 }
dot12TrainingVersion OBJECT-TYPE
SYNTAX INTEGER (0..7)
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value that will be used in the version bits
(vvv bits) in training frames on this interface.
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This is the highest version number supported by
this MAC."
REFERENCE
"IEEE 802.12, Layer Management, 13.2.5.2.1,
aMACVersion."
::= { dot12ConfigEntry 4 }
dot12LastTrainingConfig OBJECT-TYPE
SYNTAX OCTET STRING (SIZE(2))
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This 16 bit field contains the configuration
bits from the most recent error-free training
frame received during training on this interface.
Training request frames are received when in
master mode, while training response frames are
received in slave mode.
First Octet: Second Octet:
7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0
+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+
|v|v|v|D|C|N|0|0| |0|0|0|F|F|P|P|R|
+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+
vvv: The version of the 802.12 training
protocol with which the device at the
other end of the link is compliant
D: 0 = No duplicate address has been
detected. This bit is always zero
in training request frames.
1 = Duplicate address has been detected
C: 0 = The requested configuration is
compatible with the port. This bit
is always zero in training request
frames.
1 = The requested configuration is not
compatible with the port.
N: 0 = Access will be allowed, providing
the configuration is compatible (C
= 0). This bit is always zero in
training request frames.
1 = Access is not granted because of
security restrictions
FF: 00 = frameType88023
01 = frameType88025
10 = reserved
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11 = frameTypeEither (this value is seen
only when in master mode)
PP: 00 = singleAddressMode
01 = promiscuousMode
10 = reserved
11 = reserved
R: 0 = Access as an end node
1 = Access as a repeater (this value is
seen only when in master mode and
the other end of the link connects
to a repeater)
Note that dot12Status must be examined to see if
any error-free training frames have been
received."
REFERENCE
"IEEE 802.12, Layer Management, 13.2.5.2.1,
aLastTrainingConfig."
::= { dot12ConfigEntry 5 }
-- { dot12ConfigEntry 6 } is unassigned
dot12Commands OBJECT-TYPE
SYNTAX INTEGER {
noOp(1),
open(2),
reset(3),
close(4)
}
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"If the current value of dot12Status is 'closed',
setting the value of this object to 'open' will
change the corresponding instance of MIB-II's
ifAdminStatus to 'up', cause this interface to
enter the 'opening' state, and will cause training
to be initiated on this interface. The progress
and success of the open is given by the values of
the dot12Status object. Setting this object to
'open' when dot12Status has a value other than
'closed' has no effect.
Setting the corresponding instance of ifAdminStatus
to 'up' when the current value of dot12Status is
'closed' will have the same effect as setting this
object to 'open'. Setting ifAdminStatus to 'up'
when dot12Status has a value other than 'closed'
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has no effect.
Setting the value of this object to 'close' will
move this interface into the 'closed' state and
cause all transmit and receive actions to stop.
This object will then have to be set to 'open' in
order to reinitiate training.
Setting the corresponding instance of ifAdminStatus
to 'down' will have the same effect as setting this
object to 'close'.
Setting the value of this object to 'reset' when
the current value of dot12Status has a value other
than 'closed' will reset the interface. On a
reset, all MIB counters should retain their values.
This will cause the MAC to initiate an
acInitializeMAC action as specified in IEEE 802.12.
This will cause training to be reinitiated on this
interface. Setting this object to 'reset' when
dot12Status has a value of 'closed' has no effect.
Setting this object to 'reset' has no effect on the
corresponding instance of ifAdminStatus.
Setting the value of this object to 'noOp' has no
effect.
When read, this object will always have a value
of 'noOp'."
REFERENCE
"IEEE 802.12, Layer Management, 13.2.5.2.2,
acOpen, acClose, acInitializeMAC.
Also, RFC1231 IEEE802.5 Token Ring MIB,
dot5Commands."
::= { dot12ConfigEntry 7 }
dot12Status OBJECT-TYPE
SYNTAX INTEGER {
opened(1),
closed(2),
opening(3),
openFailure(5),
linkFailure(6)
}
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The current interface status with respect to
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training. One of the following values:
opened - Training has completed
successfully.
closed - MAC has been disabled by
setting dot12Commands to
'close'.
opening - MAC is in training. Training
signals have been received.
openFailure - Passed 24 error-free packets,
but there is a problem, noted
in the training configuration
bits (dot12LastTrainingConfig).
linkFailure - Training signals not received,
or could not pass 24 error-free
packets.
Whenever the dot12Commands object is set to
'close' or ifAdminStatus is set to 'down', the MAC
will go silent, dot12Status will be 'closed', and
ifOperStatus will be 'down'.
When the value of this object is equal to 'closed'
and the dot12Commands object is set to 'open' or
the ifAdminStatus object is set to 'up', training
will be initiated on this interface. When the
value of this object is not equal to 'closed' and
the dot12Commands object is set to 'reset',
training will be reinitiated on this interface.
Note that sets of some other objects (e.g.
dot12ControlMode) or external events (e.g. MAC
protocol violations) may also cause training to be
reinitiated on this interface.
When training is initiated or reinitiated on an
interface, the end node will send Training_Up to
the master and initially go to the 'linkFailure'
state and ifOperStatus will go to 'down'.
When the master sends back Training_Down,
dot12Status will change to the 'opening' state,
and training packets will be transferred.
After all of the training packets have been
passed, dot12Status will change to 'linkFailure'
if 24 consecutive error-free packets were not
passed, 'opened' if 24 consecutive error-free
packets were passed and the training
configuration bits were OK, or 'openFailure' if
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there were 24 consecutive error-free packets, but
there was a problem with the training
configuration bits.
When in the 'openFailure' state, the
dot12LastTrainingConfig object will contain the
configuration bits from the last training
packet which can be examined to determine the
exact reason for the training configuration
failure.
If training did not succeed (dot12Status is
'linkFailure' or 'openFailure), the entire
process will be restarted after
MAC_Retraining_Delay_Timer seconds.
If training does succeed (dot12Status changes to
'opened'), ifOperStatus will change to 'up'. If
training does not succeed (dot12Status changes to
'linkFailure' or 'openFailure'), ifOperStatus will
remain 'down'."
REFERENCE
"IEEE 802.12, Layer Management, 13.2.5.2.1,
aMACStatus."
::= { dot12ConfigEntry 8 }
dot12CurrentFramingType OBJECT-TYPE
SYNTAX INTEGER {
frameType88023(1),
frameType88025(2),
frameTypeUnknown(3)
}
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"When dot12DesiredFramingType is one of
'frameType88023' or 'frameType88025', this is the
type of framing asserted by the interface.
When dot12DesiredFramingType is 'frameTypeEither',
dot12CurrentFramingType shall be one of
'frameType88023' or 'frameType88025' when the
dot12Status is 'opened'. When the dot12Status is
anything other than 'opened',
dot12CurrentFramingType shall take the value of
'frameTypeUnknown'."
::= { dot12ConfigEntry 9 }
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dot12ControlMode OBJECT-TYPE
SYNTAX INTEGER {
masterMode(1),
slaveMode(2),
learn(3)
}
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"This object is used to configure and report
whether or not this interface is operating in
master mode. In a Demand Priority network, end
node interfaces typically operate in slave mode,
while switch interfaces may control the Demand
Priority protocol and operate in master mode.
This object may be implemented as a read-only
object by those agents and interfaces that do not
implement software control of master mode. In
particular, interfaces that cannot operate in
master mode, and interfaces on which master mode
is controlled by a pushbutton on the device,
should implement this object read-only.
Some interfaces do not require network management
configuration of this feature and can autosense
whether to use master mode or slave mode. The
value 'learn' is used for that purpose. While
autosense is taking place, the value 'learn' is
returned.
A network management operation which modifies the
value of dot12ControlMode causes the interface
to retrain."
::= { dot12ConfigEntry 10 }
dot12StatTable OBJECT-TYPE
SYNTAX SEQUENCE OF Dot12StatEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"Statistics for a collection of 802.12 interfaces
attached to a particular system."
::= { dot12MIBObjects 2 }
dot12StatEntry OBJECT-TYPE
SYNTAX Dot12StatEntry
MAX-ACCESS not-accessible
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STATUS current
DESCRIPTION
"Statistics for a particular interface to an
802.12 medium. The receive statistics in this
table apply only to packets received by this
station (i.e., packets whose destination address
is either the local station address, the
broadcast address, or a multicast address that
this station is receiving, unless the station is
in promiscuous mode)."
INDEX { ifIndex }
::= { dot12StatTable 1 }
Dot12StatEntry ::=
SEQUENCE {
dot12InHighPriorityFrames Counter32,
dot12InHighPriorityOctets Counter32,
dot12InNormPriorityFrames Counter32,
dot12InNormPriorityOctets Counter32,
dot12InIPMErrors Counter32,
dot12InOversizeFrameErrors Counter32,
dot12InDataErrors Counter32,
dot12InNullAddressedFrames Counter32,
dot12OutHighPriorityFrames Counter32,
dot12OutHighPriorityOctets Counter32,
dot12TransitionIntoTrainings Counter32,
dot12HCInHighPriorityOctets Counter64,
dot12HCInNormPriorityOctets Counter64,
dot12HCOutHighPriorityOctets Counter64
}
dot12InHighPriorityFrames OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object is a count of high priority frames
that have been received on this interface.
Includes both good and bad high priority frames,
as well as high priority training frames. Does
not include normal priority frames which were
priority promoted."
REFERENCE
"IEEE 802.12, Layer Management, 13.2.5.2.1,
aHighPriorityFramesReceived."
::= { dot12StatEntry 1 }
dot12InHighPriorityOctets OBJECT-TYPE
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SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object is a count of the number of octets
contained in high priority frames that have been
received on this interface. This counter is
incremented by OctetCount for each frame received
on this interface which is counted by
dot12InHighPriorityFrames.
Note that this counter will roll over very
quickly. It is provided for backward
compatibility for Network Management protocols
that do not support 64 bit counters (e.g. SNMP
version 1)."
REFERENCE
"IEEE 802.12, Layer Management, 13.2.5.2.1,
aHighPriorityOctetsReceived."
::= { dot12StatEntry 2 }
dot12InNormPriorityFrames OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object is a count of normal priority frames
that have been received on this interface.
Includes both good and bad normal priority
frames, as well as normal priority training
frames and normal priority frames which were
priority promoted."
REFERENCE
"IEEE 802.12, Layer Management, 13.2.5.2.1,
aNormalPriorityFramesReceived."
::= { dot12StatEntry 3 }
dot12InNormPriorityOctets OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object is a count of the number of octets
contained in normal priority frames that have
been received on this interface. This counter is
incremented by OctetCount for each frame received
on this interface which is counted by
dot12InNormPriorityFrames.
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Note that this counter will roll over very
quickly. It is provided for backward
compatibility for Network Management protocols
that do not support 64 bit counters (e.g. SNMP
version 1)."
REFERENCE
"IEEE 802.12, Layer Management, 13.2.5.2.1,
aNormalPriorityOctetsReceived."
::= { dot12StatEntry 4 }
dot12InIPMErrors OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object is a count of the number of frames
that have been received on this interface with an
invalid packet marker and no PMI errors. A
repeater will write an invalid packet marker to
the end of a frame containing errors as it is
forwarded through the repeater to the other
ports. This counter is incremented by one for
each frame received on this interface which has
had an invalid packet marker added to the end of
the frame."
REFERENCE
"IEEE 802.12, Layer Management, 13.2.5.2.1,
aIPMFramesReceived."
::= { dot12StatEntry 5 }
dot12InOversizeFrameErrors OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object is a count of oversize frames
received on this interface. This counter is
incremented by one for each frame received on
this interface whose OctetCount is larger than
the maximum legal frame size. The frame size
which causes this counter to increment is
dependent on the current framing type."
REFERENCE
"IEEE 802.12, Layer Management, 13.2.5.2.1,
aOversizeFramesReceived."
::= { dot12StatEntry 6 }
dot12InDataErrors OBJECT-TYPE
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SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object is a count of errored frames
received on this interface. This counter is
incremented by one for each frame received on
this interface with any of the following errors:
bad FCS (with no IPM), PMI errors (excluding
frames with an IPM as the only PMI error),
undersize, bad start of frame delimiter, or bad
end of packet marker. Does not include frames
counted by dot12InIPMErrors,
dot12InNullAddressedFrames, or
dot12InOversizeFrameErrors.
This counter indicates problems with the cable
directly attached to this interface, while
dot12InIPMErrors indicates problems with remote
cables."
REFERENCE
"IEEE 802.12, Layer Management, 13.2.5.2.1,
aDataErrorFramesReceived."
::= { dot12StatEntry 7 }
dot12InNullAddressedFrames OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object is a count of null addressed frames
received on this interface. This counter is
incremented by one for each frame received on
this interface with a destination MAC address
consisting of all zero bits. Both void and
training frames are included in this counter.
Note that since this station would normally not
receive null addressed frames, this counter is
only incremented when this station is operating
in promiscuous mode."
REFERENCE
"IEEE 802.12, Layer Management, 13.2.5.2.1,
aNullAddressedFramesReceived."
::= { dot12StatEntry 8 }
dot12OutHighPriorityFrames OBJECT-TYPE
SYNTAX Counter32
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MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This counter is incremented by one for each high
priority frame successfully transmitted out this
interface."
REFERENCE
"IEEE 802.12, Layer Management, 13.2.5.2.1,
aHighPriorityFramesTransmitted."
::= { dot12StatEntry 9 }
dot12OutHighPriorityOctets OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This counter is incremented by OctetCount for
each frame counted by dot12OutHighPriorityFrames.
Note that this counter will roll over very
quickly. It is provided for backward
compatibility for Network Management protocols
that do not support 64 bit counters (e.g. SNMP
version 1)."
REFERENCE
"IEEE 802.12, Layer Management, 13.2.5.2.1,
aHighPriorityOctetsTransmitted."
::= { dot12StatEntry 10 }
dot12TransitionIntoTrainings OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object is a count of the number of times
this interface has entered the training state.
This counter is incremented by one each time
dot12Status transitions to 'linkFailure' from any
state other than 'opening' or 'openFailure'."
REFERENCE
"IEEE 802.12, Layer Management, 13.2.5.2.1,
aTransitionsIntoTraining."
::= { dot12StatEntry 11 }
dot12HCInHighPriorityOctets OBJECT-TYPE
SYNTAX Counter64
MAX-ACCESS read-only
STATUS current
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DESCRIPTION
"This object is a count of the number of octets
contained in high priority frames that have been
received on this interface. This counter is
incremented by OctetCount for each frame received
on this interface which is counted by
dot12InHighPriorityFrames.
This counter is a 64 bit version of
dot12InHighPriorityOctets. It should be used by
Network Management protocols which support 64 bit
counters (e.g. SNMPv2)."
REFERENCE
"IEEE 802.12, Layer Management, 13.2.5.2.1,
aHighPriorityOctetsReceived."
::= { dot12StatEntry 12 }
dot12HCInNormPriorityOctets OBJECT-TYPE
SYNTAX Counter64
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object is a count of the number of octets
contained in normal priority frames that have
been received on this interface. This counter is
incremented by OctetCount for each frame received
on this interface which is counted by
dot12InNormPriorityFrames.
This counter is a 64 bit version of
dot12InNormPriorityOctets. It should be used by
Network Management protocols which support 64 bit
counters (e.g. SNMPv2)."
REFERENCE
"IEEE 802.12, Layer Management, 13.2.5.2.1,
aNormalPriorityOctetsReceived."
::= { dot12StatEntry 13 }
dot12HCOutHighPriorityOctets OBJECT-TYPE
SYNTAX Counter64
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This counter is incremented by OctetCount for
each frame counted by dot12OutHighPriorityFrames.
This counter is a 64 bit version of
dot12OutHighPriorityOctets. It should be used by
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Network Management protocols which support 64 bit
counters (e.g. SNMPv2)."
REFERENCE
"IEEE 802.12, Layer Management, 13.2.5.2.1,
aHighPriorityOctetsTransmitted."
::= { dot12StatEntry 14 }
-- conformance information
dot12Conformance OBJECT IDENTIFIER ::= { dot12MIB 2 }
dot12Compliances OBJECT IDENTIFIER ::= { dot12Conformance 1 }
dot12Groups OBJECT IDENTIFIER ::= { dot12Conformance 2 }
-- compliance statements
dot12Compliance MODULE-COMPLIANCE
STATUS current
DESCRIPTION
"The compliance statement for managed network
entities that have 802.12 interfaces."
MODULE -- this module
MANDATORY-GROUPS { dot12ConfigGroup, dot12StatsGroup }
OBJECT dot12DesiredFramingType
MIN-ACCESS read-only
DESCRIPTION
"Write access to this object is not required."
OBJECT dot12DesiredPromiscStatus
MIN-ACCESS read-only
DESCRIPTION
"Write access to this object is not required."
OBJECT dot12Commands
MIN-ACCESS read-only
DESCRIPTION
"Write access to this object is not required."
OBJECT dot12ControlMode
MIN-ACCESS read-only
DESCRIPTION
"Write access to this object is not required."
::= { dot12Compliances 1 }
-- units of conformance
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dot12ConfigGroup OBJECT-GROUP
OBJECTS { dot12DesiredFramingType,
dot12FramingCapability,
dot12DesiredPromiscStatus,
dot12TrainingVersion,
dot12LastTrainingConfig,
dot12Commands, dot12Status,
dot12CurrentFramingType,
dot12ControlMode }
STATUS current
DESCRIPTION
"A collection of objects for managing the status
and configuration of IEEE 802.12 interfaces."
::= { dot12Groups 1 }
dot12StatsGroup OBJECT-GROUP
OBJECTS { dot12InHighPriorityFrames,
dot12InHighPriorityOctets,
dot12InNormPriorityFrames,
dot12InNormPriorityOctets,
dot12InIPMErrors,
dot12InOversizeFrameErrors,
dot12InDataErrors,
dot12InNullAddressedFrames,
dot12OutHighPriorityFrames,
dot12OutHighPriorityOctets,
dot12TransitionIntoTrainings,
dot12HCInHighPriorityOctets,
dot12HCInNormPriorityOctets,
dot12HCOutHighPriorityOctets }
STATUS current
DESCRIPTION
"A collection of objects providing statistics for
IEEE 802.12 interfaces."
::= { dot12Groups 2 }
END
5. Acknowledgements
This document was produced by the IETF 100VG-AnyLAN Working Group.
It is based on the work of IEEE 802.12.
6. References
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[1] Information processing systems - Open Systems Interconnection -
Specification of Abstract Syntax Notation One (ASN.1),
International Organization for Standardization. International
Standard 8824 (December, 1987).
[2] Case, J., McCloghrie, K., Rose, M., and S. Waldbusser, "Structure
of Management Information for version 2 of the Simple Network
Management Protocol (SNMPv2)", RFC 1442, SNMP Research, Inc.,
Hughes LAN Systems, Dover Beach Consulting, Inc., Carnegie Mellon
University, April 1993.
[3] Case, J., McCloghrie, K., Rose, M., and S. Waldbusser, "Textual
Conventions for version 2 of the Simple Network Management
Protocol (SNMPv2)", RFC 1443, SNMP Research, Inc., Hughes LAN
Systems, Dover Beach Consulting, Inc., Carnegie Mellon
University, April 1993.
[4] Case, J., McCloghrie, K., Rose, M., and S. Waldbusser,
"Conformance Statements for version 2 of the Simple Network
Management Protocol (SNMPv2)", RFC 1444, SNMP Research, Inc.,
Hughes LAN Systems, Dover Beach Consulting, Inc., Carnegie Mellon
University, April 1993.
[5] McCloghrie, K., and M. Rose, "Management Information Base for
Network Management of TCP/IP-based internets - MIB-II", STD 17,
RFC 1213, Hughes LAN Systems, Performance Systems International,
March 1991.
[6] IEEE, "Demand Priority Access Method, Physical Layer and Repeater
Specifications for 100 Mb/s Operation", IEEE Standard 802.12"
[7] McCloghrie, K., and Kastenholz, F., "Evolution of the Interfaces
Group of MIB-II", RFC 1573, Hughes LAN Systems, FTP Software,
January 1994.
[8] McCloghrie, K., Baker, F., and Decker, E., "IEEE 802.5 Station
Source Routing MIB using SMIv2", RFC 1749, cisco Systems, Inc.,
December, 1994.
7. Security Considerations
Security issues are not discussed in this memo.
8. Author's Address
John Flick
John Flick Expires May 10, 1995 [Page 28]
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Hewlett Packard Company
8000 Foothills Blvd. M/S 5556
Roseville, CA 95747-5556
Phone: +1 916 785 4018
Email: johnf@hprnd.rose.hp.com
John Flick Expires May 10, 1995 [Page 29]
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Table of Contents
1. Abstract ................................................... 2
2. Object Definitions ......................................... 2
3. Overview ................................................... 2
3.1. MAC Addresses ............................................ 3
3.2. Relation to RFC 1213 ..................................... 3
3.3. Relation to RFC 1573 ..................................... 3
3.3.1. Layering Model ......................................... 4
3.3.2. Virtual Circuits ....................................... 4
3.3.3. ifTestTable ............................................ 4
3.3.4. ifRcvAddressTable ...................................... 4
3.3.5. ifPhysAddress .......................................... 4
3.3.6. Specific Interface MIB Objects ......................... 5
3.4. Relation to RFC 1749 ..................................... 8
3.5. Master Mode Operation .................................... 8
3.6. Normal and High Priority Counters ........................ 8
3.7. Mapping of IEEE 802.12 Managed Objects ................... 9
4. Definitions ................................................ 11
5. Acknowledgements ........................................... 27
6. References ................................................. 27
7. Security Considerations .................................... 28
8. Author's Address ........................................... 28
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