Network Working Group K. McCloghrie
Request for Comments: 1230 Hughes LAN Systems, Inc.
R. Fox
Synoptics, Inc.
May 1991
IEEE 802.4 Token Bus MIB
Status of this Memo
This memo defines a MIB for the IEEE 802.4 Token Bus for use with the
SNMP protocol. This memo is a product of the Transmission Working
Group of the Internet Engineering Task Force (IETF). This RFC
specifies an IAB standards track protocol for the Internet community,
and requests discussion and suggestions for improvements. Please
refer to the current edition of the "IAB Official Protocol Standards"
for the standardization state and status of this protocol.
Distribution of this memo is unlimited.
Table of Contents
1. Abstract .............................................. 1
2. The Network Management Framework....................... 2
3. Objects ............................................... 2
3.1 Format of Definitions ................................ 3
4. Overview .............................................. 3
4.1 Scope of Definitions ................................. 3
4.2 Textual Conventions .................................. 4
4.3 Optional Objects ..................................... 4
5. Definitions ........................................... 4
6. Acknowledgements ...................................... 22
7. References ............................................ 22
8. Security Considerations................................ 23
9. Authors' Addresses..................................... 23
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, this memo defines managed
objects used for managing subnetworks which use the IEEE 802.4 Token
Bus technology described in 802.4 Token-Passing Bus Access Method and
Physical Layer Specifications, IEEE Standard 802.4.
Transmission Working Group [Page 1]
RFC 1230 IEEE 802.4 MIB May 1991
2. The Network Management Framework
The Internet-standard Network Management Framework consists of three
components. They are:
RFC 1155 which defines the SMI, the mechanisms used for describing
and naming objects for the purpose of management. RFC 1212
defines a more concise description mechanism, which is wholly
consistent with the SMI.
RFC 1156 which defines MIB-I, the core set of managed objects for
the Internet suite of protocols. RFC 1213, defines MIB-II, an
evolution of MIB-I based on implementation experience and new
operational requirements.
RFC 1157 which defines the SNMP, the protocol used for network
access to managed objects.
The Framework permits new objects to be defined for the purpose of
experimentation and evaluation.
3. Objects
Managed objects are accessed via a virtual information store, termed
the Management Information Base or MIB. Objects in the MIB are
defined using the subset of Abstract Syntax Notation One (ASN.1) [7]
defined in the SMI. In particular, each object has a name, a syntax,
and an encoding. The name is an object identifier, an
administratively assigned name, which specifies an object type. 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 OBJECT
DESCRIPTOR, to also refer to the object type.
The syntax of an object type defines the abstract data structure
corresponding to that object type. The ASN.1 language is used for
this purpose. However, the SMI [3] purposely restricts the ASN.1
constructs which may be used. These restrictions are explicitly made
for simplicity.
The encoding of an object type is simply how that object type is
represented using the object type's syntax. Implicitly tied to the
notion of an object type's syntax and encoding is how the object type
is represented when being transmitted on the network.
The SMI specifies the use of the basic encoding rules of ASN.1 [8],
subject to the additional requirements imposed by the SNMP.
Transmission Working Group [Page 2]
RFC 1230 IEEE 802.4 MIB May 1991
3.1. Format of Definitions
Section 5 contains contains the specification of all object types
contained in this MIB module. The object types are defined using the
conventions defined in the SMI, as amended by the extensions
specified in [9,10].
4. Overview
This memo defines three tables:
- the 802.4 Operational Table containing state and
operational parameter information which is specific to
802.4 interfaces;
- the 802.4 Initialization Table containing the parameter
information used by an 802.4 interface as the values to
be assigned to its operational parameters upon
initialization; and
- the 802.4 Statistics Table containing 802.4 interface
statistics.
A managed system will have one entry in each of these tables for each
of its 802.4 interfaces.
This memo also defines OBJECT IDENTIFIERs, some to identify 802.4
tests, for use with the ifExtnsTestTable defined in [11], and some to
identify Token Bus interface Chip Sets, for use with the
ifExtnsChipSet object defined in [11].
4.1. Scope of Definitions
All objects defined in this memo are registered in a single subtree
within the experimental namespace [3], and are for use with every
interface which conforms to the IEEE 802.4 Token Bus Access Method
[10]. At present, this applies to interfaces for which the ifType
variable in the Internet-standard MIB [4,6] has the value:
iso88024-tokenBus(8)
For these interfaces, the value of the ifSpecific variable in the
MIB-II [6] has the OBJECT IDENTIFIER value:
dot4 OBJECT IDENTIFIER ::= { experimental 7 }
as defined below.
Transmission Working Group [Page 3]
RFC 1230 IEEE 802.4 MIB May 1991
4.2. Textual Conventions
Two new datatypes, MacAddress and OctetTime, are introduced as
textual conventions in this document. These textual conventions have
NO effect on either the syntax nor the semantics of any managed
object. Objects defined using these conventions are always encoded by
means of the rules that define their primitive type. Hence, no
changes to the SMI or the SNMP are necessary to accommodate these
textual conventions which are adopted merely for the convenience of
readers and writers in pursuit of the elusive goal of a concise and
unambiguous specification.
4.3. Optional Objects
A few objects are defined in this memo with "optional" status for the
purpose of allowing experimentation to determine whether they are
useful or not. If sufficient consensus is reached in the Internet
community to result in a subsequent revision of this memo being
placed in the Internet-standard MIB, then these optional objects will
either be removed or become mandatory.
5. Definitions
RFC1230-MIB DEFINITIONS ::= BEGIN
-- IEEE 802.4 Token Bus MIB
IMPORTS
experimental
FROM RFC1155-SMI
OBJECT-TYPE
FROM RFC-1212;
-- This MIB Module uses the extended OBJECT-TYPE macro as
-- defined in [9].
dot4 OBJECT IDENTIFIER ::= { experimental 7 }
-- All representations of MAC addresses in this MIB Module
-- use, as a textual convention (i.e. this convention does
-- not affect their encoding), the data type:
MacAddress ::= OCTET STRING (SIZE (6)) -- a 6 octet
-- address in the
-- "canonical" order
Transmission Working Group [Page 4]
RFC 1230 IEEE 802.4 MIB May 1991
-- defined by IEEE
-- 802.1a.
-- 16-bit addresses, if needed, are represented by setting
-- their upper 4 octets to all 0's, i.e., AAFF would be
-- represented as 00000000AAFF.
-- This specification follows the 802.4 convention of
-- specifying time intervals, which are dependent on the
-- bandwidth of the media, in units of octet time. One
-- octet time is the time taken to transmit eight bits.
-- Representation of such time intervals in this MIB Module
-- use, as a textual convention (i.e., this convention does
-- not affect their encoding), the data type:
OctetTime ::= INTEGER -- the value of a time
-- interval in units of octet
-- time.
-- The 802.4 Operational Table
-- This table contains state and parameter information which
-- is specific to 802.4 interfaces. It is mandatory that
-- systems having 802.4 interfaces implement this table in
-- addition to the generic interfaces table [4,6] and its
-- generic extensions [11].
dot4Table OBJECT-TYPE
SYNTAX SEQUENCE OF Dot4Entry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"This table contains Token Bus interface
parameters and state variables, one entry
per 802.5 interface."
::= { dot4 1 }
dot4Entry OBJECT-TYPE
SYNTAX Dot4Entry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"A list of Token Bus status and operational
parameter values for an 802.4 interface."
INDEX { dot4IfIndex }
::= { dot4Table 1 }
Transmission Working Group [Page 5]
RFC 1230 IEEE 802.4 MIB May 1991
Dot4Entry ::= SEQUENCE {
dot4IfIndex
INTEGER,
dot4Options
INTEGER,
dot4State
INTEGER,
dot4Commands
INTEGER,
dot4MacAddrLen
INTEGER,
dot4NextStation
MacAddress,
dot4PreviousStation
MacAddress,
dot4SlotTime
OctetTime,
dot4LastTokenRotTime
OctetTime,
dot4HiPriTokenHoldTime
OctetTime,
dot4TargetRotTimeClass4
OctetTime,
dot4TargetRotTimeClass2
OctetTime,
dot4TargetRotTimeClass0
OctetTime,
dot4TargetRotTimeRingMaint
OctetTime,
dot4RingMaintTimerInitValue
OctetTime,
dot4MaxInterSolicitCount
INTEGER (16..255),
dot4MaxRetries
INTEGER (0..7),
dot4MinPostSilencePreambLen
INTEGER,
dot4StandardRevision
INTEGER
}
dot4IfIndex OBJECT-TYPE
SYNTAX INTEGER
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The value of this object identifies the
Transmission Working Group [Page 6]
RFC 1230 IEEE 802.4 MIB May 1991
802.4 interface for which this entry
contains management information. The
value of this object for a particular
interface has the same value as the
ifIndex object, defined in [4,6], for the
same interface."
::= { dot4Entry 1 }
dot4Options OBJECT-TYPE
SYNTAX INTEGER
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The optional parts of the 802.4
specification which are in use by this
station. The options of the 802.4
specification are represented by the
following values:
1 - Priority
2 - Request-With-Response
The value of this object is given by the
sum of the above representations for
those options in use on this interface.
The value zero indicates that no options
are in use."
::= { dot4Entry 2 }
dot4State OBJECT-TYPE
SYNTAX INTEGER {
other(1),
offline(2),
outOfRing(3),
enteringRing(4),
inRing(5)
}
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The current state of the 802.4
interface. The value of other(1) is
used if the state is unknown
(e.g., due to an error condition)."
::= { dot4Entry 3 }
dot4Commands OBJECT-TYPE
SYNTAX INTEGER {
no-op(1),
enterRing(2),
Transmission Working Group [Page 7]
RFC 1230 IEEE 802.4 MIB May 1991
exitRing(3),
reset(4),
initialize(5)
}
ACCESS read-write
STATUS mandatory
DESCRIPTION
"Setting this object causes the station
to change the state of the interface as
indicated by the specified value. An
initialize(5) command causes the
interfaceto load its operational
parameters from its initialization
parameters; the value of
dot4InitInRingDesired determines
whether the station tries to enter the
logical ring immediately.
Note that the 802.4 specification
suggests a station remain Offline after a
'remote Network Management' reset(4),
until a 'local Network Management'
initialize(5) is performed.
Setting this object to a value of
no-op(1) has no effect. When read,
this object always has the value no-op(1)."
::= { dot4Entry 4 }
dot4MacAddrLen OBJECT-TYPE
SYNTAX INTEGER {
sixteenBit(1),
forty-eightBit(2)
}
ACCESS read-only
STATUS mandatory
DESCRIPTION
"This object indicates the size of MAC
addresses interpreted by this station."
::= { dot4Entry 5 }
dot4NextStation OBJECT-TYPE
SYNTAX MacAddress
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The MAC address of this station's
successor in the logical ring."
::= { dot4Entry 6 }
Transmission Working Group [Page 8]
RFC 1230 IEEE 802.4 MIB May 1991
dot4PreviousStation OBJECT-TYPE
SYNTAX MacAddress
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The source MAC address of the last token
addressed to this station."
::= { dot4Entry 7 }
dot4SlotTime OBJECT-TYPE
SYNTAX OctetTime
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The maximum time any station need wait
for an immediate MAC-level response from
another station.
This value must the same in all stations on
the 802.4 network."
::= { dot4Entry 8 }
dot4LastTokenRotTime OBJECT-TYPE
SYNTAX OctetTime
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The observed token rotation time for the
last token rotation, timed from token
arrival to token arrival. A value of
zero indicates that the token is not
rotating."
::= { dot4Entry 9 }
dot4HiPriTokenHoldTime OBJECT-TYPE
SYNTAX OctetTime
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The maximum duration for which a station
can hold the token to transmit frames of
access class 6 (if the priority option is
implemented), or of any access class (if
the priority option is not implemented)."
::= { dot4Entry 10 }
dot4TargetRotTimeClass4 OBJECT-TYPE
SYNTAX OctetTime
ACCESS read-only
Transmission Working Group [Page 9]
RFC 1230 IEEE 802.4 MIB May 1991
STATUS mandatory
DESCRIPTION
"If the priority scheme is being used,
this value specifies a limit on how long
a station can transmit frames at access
class 4. The limit is measured from the
time the station is able to start
transmitting frames at this access class
on one rotation, to the time it must stop
transmitting frames at this access class
on the next rotation. If the priority
scheme is not being used, this object has
the value 0."
::= { dot4Entry 11 }
dot4TargetRotTimeClass2 OBJECT-TYPE
SYNTAX OctetTime
ACCESS read-only
STATUS mandatory
DESCRIPTION
"If the priority scheme is being used,
this value specifies a limit on how long
a station can transmit frames at access
class 2. The limit is measured from the
time the station is able to start
transmitting frames at this access
class on one rotation, to the time it
must stop transmitting frames at this
access class on the next rotation. If
the priority scheme is not being used,
this object has the value 0."
::= { dot4Entry 12 }
dot4TargetRotTimeClass0 OBJECT-TYPE
SYNTAX OctetTime
ACCESS read-only
STATUS mandatory
DESCRIPTION
"If the priority scheme is being used,
this value specifies a limit on how long
a station can transmit frames at access
class 0. The limit is measured from the
time the station is able to start
transmitting frames at this access
class on one rotation, to the time it
must stop transmitting frames at this
access class on the next rotation. If
the priority scheme is not being used,
Transmission Working Group [Page 10]
RFC 1230 IEEE 802.4 MIB May 1991
this object has the value 0."
::= { dot4Entry 13 }
dot4TargetRotTimeRingMaint OBJECT-TYPE
SYNTAX OctetTime
ACCESS read-only
STATUS mandatory
DESCRIPTION
"A value used to limit the duration of a
token rotation. If the duration of a
token rotation exceeds this value, the
station will not open the response window
to solicit for a new successor."
::= { dot4Entry 14 }
dot4RingMaintTimerInitValue OBJECT-TYPE
SYNTAX OctetTime
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The value to which the
dot4TargetRotTimeRingMaint is set, each
time the station enters the ring.
A large value will cause the station to
solicit successors immediately upon entry
to the ring; a value of zero will cause
the station to defer this solicitation
for at least one token rotation."
::= { dot4Entry 15 }
dot4MaxInterSolicitCount OBJECT-TYPE
SYNTAX INTEGER (16..255)
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The maximum number of consecutive token
rotations without soliciting for a
successor. If this count expires, the
station opens the response window to
solicit for a successor (providing the
duration of the current token rotation
has not exceeded
dot4TargetRotTimeRingMaint). The least
significant two bits of the count are
determined randomly by the station on a
per-use basis."
::= { dot4Entry 16 }
Transmission Working Group [Page 11]
RFC 1230 IEEE 802.4 MIB May 1991
dot4MaxRetries OBJECT-TYPE
SYNTAX INTEGER (0..7)
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The maximum number of retries of a
Request-with-Response (RWR) frame. If
the RWR option is not in use, this object
has the value 0."
::= { dot4Entry 17 }
dot4MinPostSilencePreambLen OBJECT-TYPE
SYNTAX INTEGER
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The minimum number of octets of preamble
on the first frame transmitted by this
station after a period of 'transmitted'
silence."
::= { dot4Entry 18 }
dot4StandardRevision OBJECT-TYPE
SYNTAX INTEGER {
rev2(2)
}
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The Revision number of the 802.4 standard
implemented by this station."
::= { dot4Entry 19 }
-- 802.4 Initialization Table
-- This table contains the parameter information used by an
-- 802.4 interface as the values to be assigned to its
-- operational parameters upon initialization. It is
-- mandatory that systems having 802.4 interfaces implement
-- this table.
dot4InitTable OBJECT-TYPE
SYNTAX SEQUENCE OF Dot4InitEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"This table contains Token Bus
Transmission Working Group [Page 12]
RFC 1230 IEEE 802.4 MIB May 1991
initialization parameters, one entry per
802.4 interface."
::= { dot4 2 }
dot4InitEntry OBJECT-TYPE
SYNTAX Dot4InitEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"A list of Token Bus initialization
parameters for an 802.4 interface."
INDEX { dot4InitIfIndex }
::= { dot4InitTable 1 }
Dot4InitEntry ::= SEQUENCE {
dot4InitIfIndex
INTEGER,
dot4InitSlotTime
OctetTime,
dot4InitMaxInterSolicitCount
INTEGER (16..255),
dot4InitMaxRetries
INTEGER (0..7),
dot4InitHiPriTokenHoldTime
OctetTime,
dot4InitTargetRotTimeClass4
OctetTime,
dot4InitTargetRotTimeClass2
OctetTime,
dot4InitTargetRotTimeClass0
OctetTime,
dot4InitTargetRotTimeRingMaint
OctetTime,
dot4InitRingMaintTimerInitValue
OctetTime,
dot4InitMinPostSilencePreambLen
INTEGER,
dot4InitInRingDesired
INTEGER
}
dot4InitIfIndex OBJECT-TYPE
SYNTAX INTEGER
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The value of this object identifies the
802.4 interface for which this entry
Transmission Working Group [Page 13]
RFC 1230 IEEE 802.4 MIB May 1991
contains management information. The
value of this object for a particular
interface has the same value as the
ifIndex object, defined in [4,6], for
the same interface."
::= { dot4InitEntry 1 }
dot4InitSlotTime OBJECT-TYPE
SYNTAX OctetTime
ACCESS read-write
STATUS mandatory
DESCRIPTION
"The value assigned to the object
dot4SlotTime when the station is
initialized."
::= { dot4InitEntry 2 }
dot4InitMaxInterSolicitCount OBJECT-TYPE
SYNTAX INTEGER (16..255)
ACCESS read-write
STATUS mandatory
DESCRIPTION
"The value assigned to the object
dot4MaxInterSolicitCount when the station
is initialized."
::= { dot4InitEntry 3 }
dot4InitMaxRetries OBJECT-TYPE
SYNTAX INTEGER (0..7)
ACCESS read-write
STATUS mandatory
DESCRIPTION
"The value assigned to the object
dot4MaxRetries when the station is
initialized."
::= { dot4InitEntry 4 }
dot4InitHiPriTokenHoldTime OBJECT-TYPE
SYNTAX OctetTime
ACCESS read-write
STATUS mandatory
DESCRIPTION
"The value assigned to the object
dot4HiPriTokenHoldTime when the station
is initialized."
::= { dot4InitEntry 5 }
Transmission Working Group [Page 14]
RFC 1230 IEEE 802.4 MIB May 1991
dot4InitTargetRotTimeClass4 OBJECT-TYPE
SYNTAX OctetTime
ACCESS read-write
STATUS mandatory
DESCRIPTION
"The value assigned to the object
dot4TargetRotTimeClass4 when the station
is initialized."
::= { dot4InitEntry 6 }
dot4InitTargetRotTimeClass2 OBJECT-TYPE
SYNTAX OctetTime
ACCESS read-write
STATUS mandatory
DESCRIPTION
"The value assigned to the object
dot4TargetRotTimeClass2 when the station
is initialized."
::= { dot4InitEntry 7 }
dot4InitTargetRotTimeClass0 OBJECT-TYPE
SYNTAX OctetTime
ACCESS read-write
STATUS mandatory
DESCRIPTION
"The value assigned to the object
dot4TargetRotTimeClass0 when the station
is initialized."
::= { dot4InitEntry 8 }
dot4InitTargetRotTimeRingMaint OBJECT-TYPE
SYNTAX OctetTime
ACCESS read-write
STATUS mandatory
DESCRIPTION
"The value assigned to the object
dot4TargetRotTimeRingMaint when the station
is initialized."
::= { dot4InitEntry 9 }
dot4InitRingMaintTimerInitValue OBJECT-TYPE
SYNTAX OctetTime
ACCESS read-write
STATUS mandatory
DESCRIPTION
"The value assigned to the object
dot4RingMaintTimerInitValue when the
station is initialized."
Transmission Working Group [Page 15]
RFC 1230 IEEE 802.4 MIB May 1991
::= { dot4InitEntry 10 }
dot4InitMinPostSilencePreambLen OBJECT-TYPE
SYNTAX INTEGER
ACCESS read-write
STATUS mandatory
DESCRIPTION
"The value assigned to the object
dot4MinPostSilencePreambLen when the
station is initialized."
::= { dot4InitEntry 11 }
dot4InitInRingDesired OBJECT-TYPE
SYNTAX INTEGER {
inRing(1),
outOfRing(2)
}
ACCESS read-write
STATUS mandatory
DESCRIPTION
"This object determines whether the
station will attempt to enter the logical
ring immediately after initialization."
::= { dot4InitEntry 12 }
-- 802.4 Statistics Table
-- This table contains Token Bus statistics, one entry per
-- 802.4 interface. It is mandatory that systems having
-- 802.4 interfaces implement this table.
dot4StatsTable OBJECT-TYPE
SYNTAX SEQUENCE OF Dot4StatsEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"A table containing Token Bus statistics.
All the statistics are defined using the
syntax Counter as 32 bit wrap around
counters. Thus, if an interface's
hardware chip set maintains these
statistics in 16-bit counters, then the
agent must read the hardware's counters
frequently enough to prevent loss of
significance, in order to maintain
a 32-bit counter in software."
::= { dot4 3 }
Transmission Working Group [Page 16]
RFC 1230 IEEE 802.4 MIB May 1991
dot4StatsEntry OBJECT-TYPE
SYNTAX Dot4StatsEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"An entry containing the 802.4 statistics
for a particular interface."
INDEX { dot4StatsIfIndex }
::= { dot4StatsTable 1 }
Dot4StatsEntry ::= SEQUENCE {
dot4StatsIfIndex
INTEGER,
dot4StatsTokenPasses
Counter,
dot4StatsTokenHeards
Counter,
dot4StatsNoSuccessors
Counter,
dot4StatsWhoFollows
Counter,
dot4StatsTokenPassFails
Counter,
dot4StatsNonSilences
Counter,
dot4StatsFcsErrors
Counter,
dot4StatsEbitErrors
Counter,
dot4StatsFrameFrags
Counter,
dot4StatsFrameTooLongs
Counter,
dot4StatsOverRuns
Counter,
dot4StatsDupAddresses
Counter
}
dot4StatsIfIndex OBJECT-TYPE
SYNTAX INTEGER
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The value of this object identifies the
802.4 interface for which this entry
contains management information. The
value of this object for a particular
Transmission Working Group [Page 17]
RFC 1230 IEEE 802.4 MIB May 1991
interface has the same value as the
ifIndex object, defined in [4,6], for the
same interface."
::= { dot4StatsEntry 1 }
dot4StatsTokenPasses OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS optional
DESCRIPTION
"The number of times this station has
passed the token."
::= { dot4StatsEntry 2 }
dot4StatsTokenHeards OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS optional
DESCRIPTION
"The number of tokens heard by this
station."
::= { dot4StatsEntry 3 }
dot4StatsNoSuccessors OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of times the station could
not find a successor while believing
itself not the only station in the ring.
This can signify a faulty transmitter
condition in this station."
::= { dot4StatsEntry 4 }
dot4StatsWhoFollows OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of times the station has had
to look for a new next station."
::= { dot4StatsEntry 5 }
dot4StatsTokenPassFails OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
Transmission Working Group [Page 18]
RFC 1230 IEEE 802.4 MIB May 1991
DESCRIPTION
"The number of times the station failed in
passing the token to the next station."
::= { dot4StatsEntry 6 }
dot4StatsNonSilences OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of occurrences of non-silence
followed by silence in which a start
delimiter was not detected."
::= { dot4StatsEntry 7 }
dot4StatsFcsErrors OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of frames received with an
incorrect FCS and the E-bit reset."
::= { dot4StatsEntry 8 }
dot4StatsEbitErrors OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of frames the station
received with the E-bit set in the
end delimiter."
::= { dot4StatsEntry 9 }
dot4StatsFrameFrags OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of occurrences of receiving a
start delimiter followed by another start
delimiter, an invalid symbol sequence or
silence, without an intervening end
delimiter."
::= { dot4StatsEntry 10 }
dot4StatsFrameTooLongs OBJECT-TYPE
SYNTAX Counter
Transmission Working Group [Page 19]
RFC 1230 IEEE 802.4 MIB May 1991
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of frames that were received
that were larger than the media's MTU."
::= { dot4StatsEntry 11 }
dot4StatsOverRuns OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of times a FIFO overrun was
detected in the station."
::= { dot4StatsEntry 12 }
dot4StatsDupAddresses OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of times this station
detected another station using the same
MAC address."
::= { dot4StatsEntry 13 }
-- 802.4 Interface Tests
dot4Tests OBJECT IDENTIFIER ::= { dot4 5 }
-- The extensions to the interfaces table proposed in [11]
-- define a table object, ifExtnsTestTable, through which a
-- network manager can instruct an agent to test an interface
-- for various faults. A test to be performed is identified
-- (as the value of ifExtnsTestType) via an OBJECT IDENTIFIER.
-- When a test fails, the object ifExtnsTestCode, defined in
-- [11], may contain a media-specific error-code. For 802.4
-- interfaces, the following is defined as the value of
-- ifExtnsTestCode when a test fails because the modem could
-- not be initialized:
dot4Errors OBJECT IDENTIFIER ::= { dot4 4 }
dot4ModemInitFailed OBJECT IDENTIFIER ::= { dot4Errors 1 }
-- The Full-Duplex Loop Back Test is a common test, defined
-- in [11] as:
Transmission Working Group [Page 20]
RFC 1230 IEEE 802.4 MIB May 1991
--
-- testFullDuplexLoopBack
--
-- Invoking this test on a 802.4 interface causes the
-- interface to check the path from memory through the chip
-- set's serial interface back to memory, thus checking the
-- proper functioning of the transmit and receive machines
-- of the token bus hardware.
-- This test may only be invoked when the interface is
-- the Offline state.
-- The FIFO Path test is defined by:
testFifoPath OBJECT IDENTIFIER ::= { dot4Tests 1 }
-- Invoking this test causes the interface to check the path
-- from memory to the chip set's FIFO and back to memory.
-- This test checks the hosts interface to the token bus
-- hardware. This test may only be invoked when the
-- interface is the Offline state.
-- The External Loopback test is defined by:
testExternalLoopback OBJECT IDENTIFIER ::= { dot4Tests 2 }
-- Invoking this test causes the interface to check the path
-- from memory through the chip set and out onto the network
-- for external (e.g., at the head-end) loopback through the
-- chip set to memory. This test checks the host's interface
-- to the 802.4 network. This test is liable to cause
-- serious disruption if invoked on an operational network.
-- 802.4 Hardware Chip Sets
dot4ChipSets OBJECT IDENTIFIER ::= { dot4 6 }
-- The extensions to the interfaces table proposed in [11]
-- define an object, ifExtnsChipSet, with the syntax of
-- OBJECT IDENTIFIER, to identify the hardware chip set in
-- use by an interface. That definition specifies just
-- one applicable object identifier:
--
-- unknownChipSet
--
-- for use as the value of ifExtnsChipSet when the specific
-- chip set is unknown.
Transmission Working Group [Page 21]
RFC 1230 IEEE 802.4 MIB May 1991
--
-- This MIB defines the following for use as values of
-- ifExtnsChipSet:
-- for use as values of ifExtnsChipSet
-- Motorola 68824 Token Bus Controller
chipSetMc68824 OBJECT IDENTIFIER ::= { dot4ChipSets 1 }
END
6. Acknowledgements
This document was produced under the auspices of the IETF's
Transmission Working Group. The comments of the following
individuals are acknowledged:
Brian Kline, Hughes LAN Systems, Inc.
Bruce Lieberman, Hughes LAN Systems, Inc.
Marshall T. Rose, Performance Systems International, Inc.
7. References
[1] Cerf, V., "IAB Recommendations for the Development of Internet
Network Management Standards", RFC 1052, NRI, April 1988.
[2] Cerf, V., "Report of the Second Ad Hoc Network Management Review
Group", RFC 1109, NRI, August 1989.
[3] Rose M., and K. McCloghrie, "Structure and Identification of
Management Information for TCP/IP-based internets", RFC 1155,
Performance Systems International, Hughes LAN Systems, May 1990.
[4] McCloghrie K., and M. Rose, "Management Information Base for
Network Management of TCP/IP-based internets", RFC 1156, Hughes
LAN Systems, Performance Systems International, May 1990.
[5] Case, J., Fedor, M., Schoffstall, M., and J. Davin, "Simple
Network Management Protocol (SNMP), RFC 1157, SNMP Research,
Performance Systems International, Performance Systems
International, MIT Laboratory for Computer Science, May 1990.
[6] McCloghrie K., and M. Rose, Editors, "Management Information Base
for Network Management of TCP/IP-based internets", RFC 1213,
Performance Systems International, March 1991.
[7] Information processing systems - Open Systems Interconnection -
Specification of Abstract Syntax Notation One (ASN.1),
International Organization for Standardization, International
Transmission Working Group [Page 22]
RFC 1230 IEEE 802.4 MIB May 1991
Standard 8824, December 1987.
[8] Information processing systems - Open Systems Interconnection -
Specification of Basic Encoding Rules for Abstract Notation One
(ASN.1), International Organization for Standardization,
International Standard 8825, December 1987.
[9] Rose, M., and K. McCloghrie, Editors, "Concise MIB Definitions",
RFC 1212, Performance Systems International, Hughes LAN Systems,
March 1991.
[10] Token-Passing Bus Access Method and Physical Layer
Specifications, Institute of Electrical and Electronic Engineers,
IEEE Standard 802.4, May 1988.
[11] McCloghrie, K., Editor, "Extensions to the Generic-Interface
MIB", RFC 1229, Hughes LAN Systems, May 1991.
8. Security Considerations
Security issues are not discussed in this memo.
9. Authors' Addresses
Keith McCloghrie
Hughes LAN Systems, Inc.
1225 Charleston Road
Mountain View, CA 94043
Phone: (415) 966-7934
EMail: kzm@hls.com
Richard Fox
Synoptics, Inc.
4401 Great America Pkwy
PO Box 58185
Santa Clara, Cal. 95052
Phone: (408) 764-1372
EMail: rfox@synoptics.com
Transmission Working Group [Page 23]
RFC, FYI, BCP