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IETF RFC 1231
IEEE 802.5 Token Ring MIB
Last modified on Friday, May 24th, 1991
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Network Working Group K. McCloghrie
Request for Comments: 1231 Hughes LAN Systems, Inc.
R. Fox
Synoptics, Inc.
E. Decker
cisco Systems, Inc.
May 1991
IEEE 802.5 Token Ring MIB
 Status of this Memo
This memo defines a MIB for 805.5 networks 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 ................................. 3
5. Definitions ........................................... 4
6. Acknowledgements ...................................... 21
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 802.5 Token
Ring technology described in 802.5 Token Ring Access Method and
Physical Layer Specifications, IEEE Standard 802.5-1989.
Transmission Working Group PAGE 1 
RFC 1231 IEEE 802.5 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 1231 IEEE 802.5 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 802.5 Interface Table, which
contains state and parameter information which is specific to 802.5
interfaces, the 802.5 Statistics Table, which contains 802.5
interface statistics, and the 802.5 Timer Table, which contains the
values of 802.5-defined timers. A managed system will have one entry
in the 802.5 Interface Table and one entry in the 802.5 Statistics
Table for each of its 802.5 interfaces. Implementation of the 802.5
Timer Table is optional.
This memo also defines OBJECT IDENTIFIERs, some to identify 802.5
tests, for use with the ifExtnsTestTable defined in [11], and some to
identify Token Ring 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 802.5 Token Ring Access Method
and Physical Layer Specifications [10]. At present, this applies to
interfaces for which the ifType variable in the Internet-standard MIB
[4,6] has the value:
iso88025-tokenRing(9)
For these interfaces, the value of the ifSpecific variable in the
MIB-II [6] has the OBJECT IDENTIFIER value:
dot5 OBJECT IDENTIFIER ::= { experimental 4 }
as defined below.
4.2. Textual Conventions
A new datatype, MacAddress, is introduced as a textual convention in
this document. This textual convention has NO effect on either the
syntax nor the semantics of any managed object. Objects defined using
this convention are always encoded by means of the rules that define
their primitive type. Hence, no changes to the SMI or the SNMP are
Transmission Working Group PAGE 3
RFC 1231 IEEE 802.5 MIB May 1991
necessary to accommodate this textual convention which is adopted
merely for the convenience of readers.
5. Definitions
RFC 1231-MIB DEFINITIONS ::= BEGIN
-- IEEE 802.5 Token Ring MIB
IMPORTS
experimental
FROM RFC 1155-SMI
OBJECT-TYPE
FROM RFC 1212;
-- This MIB Module uses the extended OBJECT-TYPE macro as
-- defined in [9].
dot5 OBJECT IDENTIFIER ::= { experimental 4 }
-- 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
-- defined by IEEE 802.1a, i.e., as if it were transmitted
-- least significant bit first, even though 802.5 (in
-- contrast to other 802.x protocols) requires MAC addresses
-- to be transmitted most significant bit first.
--
-- 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.
-- The Interface Table
-- This table contains state and parameter information which
-- is specific to 802.5 interfaces. It is mandatory that
-- systems having 802.5 interfaces implement this table in
-- addition to the generic interfaces table [4,6] and its
-- generic extensions [11].
Transmission Working Group PAGE 4
RFC 1231 IEEE 802.5 MIB May 1991
dot5Table OBJECT-TYPE
SYNTAX SEQUENCE OF Dot5Entry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"This table contains Token Ring interface
parameters and state variables, one entry
per 802.5 interface."
::= { dot5 1 }
dot5Entry OBJECT-TYPE
SYNTAX Dot5Entry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"A list of Token Ring status and parameter
values for an 802.5 interface."
INDEX { dot5IfIndex }
::= { dot5Table 1 }
Dot5Entry
::= SEQUENCE {
dot5IfIndex
INTEGER,
dot5Commands
INTEGER,
dot5RingStatus
INTEGER,
dot5RingState
INTEGER,
dot5RingOpenStatus
INTEGER,
dot5RingSpeed
INTEGER,
dot5UpStream
MacAddress,
dot5ActMonParticipate
INTEGER,
dot5Functional
MacAddress
}
dot5IfIndex OBJECT-TYPE
SYNTAX INTEGER
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The value of this object identifies the
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RFC 1231 IEEE 802.5 MIB May 1991
802.5 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."
::= { dot5Entry 1 }
dot5Commands OBJECT-TYPE
SYNTAX INTEGER {
no-op(1),
open(2),
reset(3),
close(4)
}
ACCESS read-write
STATUS mandatory
DESCRIPTION
"When this object is set to the value of
open(2), the station should go into the
open state. The progress and success of
the open is given by the values of the
objects dot5RingState and
dot5RingOpenStatus.
When this object is set to the value
of reset(3), then the station should do
a reset. On a reset, all MIB counters
should retain their values, if possible.
Other side affects are dependent on the
hardware chip set.
When this object is set to the value
of close(4), the station should go into
the stopped state by removing itself
from the ring.
Setting this object to a value of
no-op(1) has no effect.
When read, this object always has a
value of no-op(1)."
::= { dot5Entry 2 }
dot5RingStatus OBJECT-TYPE
SYNTAX INTEGER
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The current interface status which can
be used to diagnose fluctuating problems
that can occur on token rings, after a
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RFC 1231 IEEE 802.5 MIB May 1991
station has successfully been added to
the ring.
Before an open is completed, this
object has the value for the 'no status'
condition. The dot5RingState and
dot5RingOpenStatus objects provide for
debugging problems when the station
can not even enter the ring.
The object's value is a sum of
values, one for each currently applicable
condition. The following values are
defined for various conditions:
0 = No Problems detected
32 = Ring Recovery
64 = Single Station
256 = Remove Received
512 = reserved
1024 = Auto-Removal Error
2048 = Lobe Wire Fault
4096 = Transmit Beacon
8192 = Soft Error
16384 = Hard Error
32768 = Signal Loss
131072 = no status, open not completed."
::= { dot5Entry 3 }
dot5RingState OBJECT-TYPE
SYNTAX INTEGER {
opened(1),
closed(2),
opening(3),
closing(4),
openFailure(5),
ringFailure(6)
}
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The current interface state with respect
to entering or leaving the ring."
::= { dot5Entry 4 }
dot5RingOpenStatus OBJECT-TYPE
SYNTAX INTEGER {
noOpen(1), -- no open attempted
badParam(2),
lobeFailed(3),
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RFC 1231 IEEE 802.5 MIB May 1991
signalLoss(4),
insertionTimeout(5),
ringFailed(6),
beaconing(7),
duplicateMAC(8),
requestFailed(9),
removeReceived(10),
open(11) -- last open successful
}
ACCESS read-only
STATUS mandatory
DESCRIPTION
"This object indicates the success, or the
reason for failure, of the station's most
recent attempt to enter the ring."
::= { dot5Entry 5 }
dot5RingSpeed OBJECT-TYPE
SYNTAX INTEGER {
unknown(1),
oneMegabit(2),
fourMegabit(3),
sixteenMegabit(4)
}
ACCESS read-write
STATUS mandatory
DESCRIPTION
"The ring's bandwidth."
::= { dot5Entry 6 }
dot5UpStream OBJECT-TYPE
SYNTAX MacAddress
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The MAC-address of the up stream neighbor
station in the ring."
::= { dot5Entry 7 }
dot5ActMonParticipate OBJECT-TYPE
SYNTAX INTEGER {
true(1),
false(2)
}
ACCESS read-write
STATUS mandatory
DESCRIPTION
"If this object has a value of true(1) then
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RFC 1231 IEEE 802.5 MIB May 1991
this interface will participate in the
active monitor selection process. If the
value is false(2) then it will not.
Setting this object might not have an
effect until the next time the interface
is opened."
::= { dot5Entry 8 }
dot5Functional OBJECT-TYPE
SYNTAX MacAddress
ACCESS read-write
STATUS mandatory
DESCRIPTION
"The bit mask of all Token Ring functional
addresses for which this interface will
accept frames."
::= { dot5Entry 9 }
-- The Statistics Table
-- This table contains statistics and error counter which are
-- specific to 802.5 interfaces. It is mandatory that systems
-- having 802.5 interfaces implement this table.
dot5StatsTable OBJECT-TYPE
SYNTAX SEQUENCE OF Dot5StatsEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"A table containing Token Ring statistics,
one entry per 802.5 interface.
All the statistics are defined using
the syntax Counter as 32-bit wrap around
counters. Thus, if an interface's
hardware 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 32-bit counters in software."
::= { dot5 2 }
dot5StatsEntry OBJECT-TYPE
SYNTAX Dot5StatsEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
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RFC 1231 IEEE 802.5 MIB May 1991
"An entry contains the 802.5 statistics
for a particular interface."
INDEX { dot5StatsIfIndex }
::= { dot5StatsTable 1 }
Dot5StatsEntry
::= SEQUENCE {
dot5StatsIfIndex
INTEGER,
dot5StatsLineErrors
Counter,
dot5StatsBurstErrors
Counter,
dot5StatsACErrors
Counter,
dot5StatsAbortTransErrors
Counter,
dot5StatsInternalErrors
Counter,
dot5StatsLostFrameErrors
Counter,
dot5StatsReceiveCongestions
Counter,
dot5StatsFrameCopiedErrors
Counter,
dot5StatsTokenErrors
Counter,
dot5StatsSoftErrors
Counter,
dot5StatsHardErrors
Counter,
dot5StatsSignalLoss
Counter,
dot5StatsTransmitBeacons
Counter,
dot5StatsRecoverys
Counter,
dot5StatsLobeWires
Counter,
dot5StatsRemoves
Counter,
dot5StatsSingles
Counter,
dot5StatsFreqErrors
Counter
}
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RFC 1231 IEEE 802.5 MIB May 1991
dot5StatsIfIndex OBJECT-TYPE
SYNTAX INTEGER
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The value of this object identifies the
802.5 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."
::= { dot5StatsEntry 1 }
dot5StatsLineErrors OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"This counter is incremented when a frame
or token is copied or repeated by a
station, the E bit is zero in the frame
or token and one of the following
conditions exists: 1) there is a
non-data bit (J or K bit) between the SD
and the ED of the frame or token, or
2) there is an FCS error in the frame."
::= { dot5StatsEntry 2 }
dot5StatsBurstErrors OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"This counter is incremented when a station
detects the absence of transitions for five
half-bit timers (burst-five error)."
::= { dot5StatsEntry 3 }
dot5StatsACErrors OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"This counter is incremented when a station
receives an AMP or SMP frame in which A is
equal to C is equal to 0, and then receives
another SMP frame with A is equal to C is
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RFC 1231 IEEE 802.5 MIB May 1991
equal to 0 without first receiving an AMP
frame. It denotes a station that cannot set
the AC bits properly."
::= { dot5StatsEntry 4 }
dot5StatsAbortTransErrors OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"This counter is incremented when a station
transmits an abort delimiter while
transmitting."
::= { dot5StatsEntry 5 }
dot5StatsInternalErrors OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"This counter is incremented when a station
recognizes an internal error."
::= { dot5StatsEntry 6 }
dot5StatsLostFrameErrors OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"This counter is incremented when a station
is transmitting and its TRR timer expires.
This condition denotes a condition where a
transmitting station in strip mode does not
receive the trailer of the frame before the
TRR timer goes off."
::= { dot5StatsEntry 7 }
dot5StatsReceiveCongestions OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"This counter is incremented when a station
recognizes a frame addressed to its
specific address, but has no available
buffer space indicating that the station
is congested."
::= { dot5StatsEntry 8 }
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RFC 1231 IEEE 802.5 MIB May 1991
dot5StatsFrameCopiedErrors OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"This counter is incremented when a station
recognizes a frame addressed to its
specific address and detects that the FS
field A bits are set to 1 indicating a
possible line hit or duplicate address."
::= { dot5StatsEntry 9 }
dot5StatsTokenErrors OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"This counter is incremented when a station
acting as the active monitor recognizes an
error condition that needs a token
transmitted."
::= { dot5StatsEntry 10 }
dot5StatsSoftErrors OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of Soft Errors the interface
has detected. It directly corresponds to
the number of Report Error MAC frames
that this interface has transmitted.
Soft Errors are those which are
recoverable by the MAC layer protocols."
::= { dot5StatsEntry 11 }
dot5StatsHardErrors OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of times this interface has
detected an immediately recoverable
fatal error. It denotes the number of
times this interface is either
transmitting or receiving beacon MAC
frames."
::= { dot5StatsEntry 12 }
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RFC 1231 IEEE 802.5 MIB May 1991
dot5StatsSignalLoss OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of times this interface has
detected the loss of signal condition from
the ring."
::= { dot5StatsEntry 13 }
dot5StatsTransmitBeacons OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of times this interface has
transmitted a beacon frame."
::= { dot5StatsEntry 14 }
dot5StatsRecoverys OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of Claim Token MAC frames
received or transmitted after the interface
has received a Ring Purge MAC frame. This
counter signifies the number of times the
ring has been purged and is being recovered
back into a normal operating state."
::= { dot5StatsEntry 15 }
dot5StatsLobeWires OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of times the interface has
detected an open or short circuit in the
lobe data path. The adapter will be closed
and dot5RingState will signify this
condition."
::= { dot5StatsEntry 16 }
dot5StatsRemoves OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
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RFC 1231 IEEE 802.5 MIB May 1991
DESCRIPTION
"The number of times the interface has
received a Remove Ring Station MAC frame
request. When this frame is received
the interface will enter the close state
and dot5RingState will signify this
condition."
::= { dot5StatsEntry 17 }
dot5StatsSingles OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of times the interface has
sensed that it is the only station on the
ring. This will happen if the interface
is the first one up on a ring, or if
there is a hardware problem."
::= { dot5StatsEntry 18 }
dot5StatsFreqErrors OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS optional
DESCRIPTION
"The number of times the interface has
detected that the frequency of the
incoming signal differs from the expected
frequency by more than that specified by
the IEEE 802.5 standard, see chapter 7
in [10]."
::= { dot5StatsEntry 19 }
-- The Timer Table
-- This group contains the values of the timers defined in
-- [10] for 802.5 interfaces. It is optional that systems
-- having 802.5 interfaces implement this group.
dot5TimerTable OBJECT-TYPE
SYNTAX SEQUENCE OF Dot5TimerEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"This table contains Token Ring interface
timer values, one entry per 802.5
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RFC 1231 IEEE 802.5 MIB May 1991
interface."
::= { dot5 5 }
dot5TimerEntry OBJECT-TYPE
SYNTAX Dot5TimerEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"A list of Token Ring timer values for an
802.5 interface."
INDEX { dot5TimerIfIndex }
::= { dot5TimerTable 1 }
Dot5TimerEntry
::= SEQUENCE {
dot5TimerIfIndex
INTEGER,
dot5TimerReturnRepeat
INTEGER,
dot5TimerHolding
INTEGER,
dot5TimerQueuePDU
INTEGER,
dot5TimerValidTransmit
INTEGER,
dot5TimerNoToken
INTEGER,
dot5TimerActiveMon
INTEGER,
dot5TimerStandbyMon
INTEGER,
dot5TimerErrorReport
INTEGER,
dot5TimerBeaconTransmit
INTEGER,
dot5TimerBeaconReceive
INTEGER
}
dot5TimerIfIndex OBJECT-TYPE
SYNTAX INTEGER
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The value of this object identifies the
802.5 interface for which this entry
contains timer values. The value of
this object for a particular interface
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RFC 1231 IEEE 802.5 MIB May 1991
has the same value as the ifIndex
object, defined in [4,6], for the same
interface."
::= { dot5TimerEntry 1 }
dot5TimerReturnRepeat OBJECT-TYPE
SYNTAX INTEGER
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The time-out value used to ensure the
interface will return to Repeat State, in
units of 100 micro-seconds. The value
should be greater than the maximum ring
latency.
Implementors are encouraged to provide
read-write access to this object if that is
possible/useful in their system, but giving
due consideration to the dangers of
write-able timers."
::= { dot5TimerEntry 2 }
dot5TimerHolding OBJECT-TYPE
SYNTAX INTEGER
ACCESS read-only
STATUS mandatory
DESCRIPTION
"Maximum period of time a station is
permitted to transmit frames after capturing
a token, in units of 100 micro-seconds.
Implementors are encouraged to provide
read-write access to this object if that is
possible/useful in their system, but giving
due consideration to the dangers of
write-able timers."
::= { dot5TimerEntry 3 }
dot5TimerQueuePDU OBJECT-TYPE
SYNTAX INTEGER
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The time-out value for enqueuing of an SMP
PDU after reception of an AMP or SMP
frame in which the A and C bits were
equal to 0, in units of 100
micro-seconds.
Implementors are encouraged to provide
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RFC 1231 IEEE 802.5 MIB May 1991
read-write access to this object if that is
possible/useful in their system, but giving
due consideration to the dangers of
write-able timers."
::= { dot5TimerEntry 4 }
dot5TimerValidTransmit OBJECT-TYPE
SYNTAX INTEGER
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The time-out value used by the active
monitor to detect the absence of valid
transmissions, in units of 100
micro-seconds.
Implementors are encouraged to provide
read-write access to this object if that is
possible/useful in their system, but giving
due consideration to the dangers of
write-able timers."
::= { dot5TimerEntry 5 }
dot5TimerNoToken OBJECT-TYPE
SYNTAX INTEGER
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The time-out value used to recover from
various-related error situations [9].
If N is the maximum number of stations on
the ring, the value of this timer is
normally:
dot5TimerReturnRepeat + N*dot5TimerHolding.
Implementors are encouraged to provide
read-write access to this object if that is
possible/useful in their system, but giving
due consideration to the dangers of
write-able timers."
::= { dot5TimerEntry 6 }
dot5TimerActiveMon OBJECT-TYPE
SYNTAX INTEGER
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The time-out value used by the active
monitor to stimulate the enqueuing of an
AMP PDU for transmission, in units of
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RFC 1231 IEEE 802.5 MIB May 1991
100 micro-seconds.
Implementors are encouraged to provide
read-write access to this object if that is
possible/useful in their system, but giving
due consideration to the dangers of
write-able timers."
::= { dot5TimerEntry 7 }
dot5TimerStandbyMon OBJECT-TYPE
SYNTAX INTEGER
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The time-out value used by the stand-by
monitors to ensure that there is an active
monitor on the ring and to detect a
continuous stream of tokens, in units of
100 micro-seconds.
Implementors are encouraged to provide
read-write access to this object if that is
possible/useful in their system, but giving
due consideration to the dangers of
write-able timers."
::= { dot5TimerEntry 8 }
dot5TimerErrorReport OBJECT-TYPE
SYNTAX INTEGER
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The time-out value which determines how
often a station shall send a Report Error
MAC frame to report its error counters,
in units of 100 micro-seconds.
Implementors are encouraged to provide
read-write access to this object if that is
possible/useful in their system, but giving
due consideration to the dangers of
write-able timers."
::= { dot5TimerEntry 9 }
dot5TimerBeaconTransmit OBJECT-TYPE
SYNTAX INTEGER
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The time-out value which determines how
long a station shall remain in the state
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RFC 1231 IEEE 802.5 MIB May 1991
of transmitting Beacon frames before
entering the Bypass state, in units of
100 micro-seconds.
Implementors are encouraged to provide
read-write access to this object if that is
possible/useful in their system, but giving
due consideration to the dangers of
write-able timers."
::= { dot5TimerEntry 10 }
dot5TimerBeaconReceive OBJECT-TYPE
SYNTAX INTEGER
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The time-out value which determines how
long a station shall receive Beacon
frames from its downstream neighbor
before entering the Bypass state, in
units of 100 micro-seconds.
Implementors are encouraged to provide
read-write access to this object if that is
possible/useful in their system, but giving
due consideration to the dangers of
write-able timers."
::= { dot5TimerEntry 11 }
-- 802.5 Interface Tests
dot5Tests OBJECT IDENTIFIER ::= { dot5 3 }
-- 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.
--
-- The Full-Duplex Loop Back Test is a common test, defined
-- in [11] as:
--
-- testFullDuplexLoopBack
--
-- Invoking this test on a 802.5 interface causes the
-- interface to check the path from memory through the
-- chip set's internal logic and back to memory, thus
-- checking the proper functioning of the systems's
-- interface to the chip set.
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RFC 1231 IEEE 802.5 MIB May 1991
-- The Insert Function test is defined by:
testInsertFunc OBJECT IDENTIFIER ::= { dot5Tests 1 }
-- Invoking this test causes the station to test the insert
-- ring logic of the hardware if the station's lobe media
-- cable is connected to a wiring concentrator. Note that
-- this command inserts the station into the network, and
-- thus, could cause problems if the station is connected
-- to a operational network.
-- 802.5 Hardware Chip Sets
dot5ChipSets OBJECT IDENTIFIER ::= { dot5 4 }
-- 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.
--
-- This MIB defines the following for use as values of
-- ifExtnsChipSet:
-- IBM 16/4 Mb/s
chipSetIBM16 OBJECT IDENTIFIER ::= { dot5ChipSets 1 }
-- TI 4Mb/s
chipSetTItms380 OBJECT IDENTIFIER ::= { dot5ChipSets 2 }
-- TI 16/4 Mb/s
chipSetTItms380c16 OBJECT IDENTIFIER ::= { dot5ChipSets 3 }
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:
Transmission Working Group PAGE 21
RFC 1231 IEEE 802.5 MIB May 1991
Tom Benkart, Advanced Computer Communications
Stan Froyd, Advanced Computer Communications
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
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 Ring Access Method and Physical Layer Specifications,
Institute of Electrical and Electronic Engineers, IEEE Standard
802.5-1989, 1989.
Transmission Working Group PAGE 22
RFC 1231 IEEE 802.5 MIB May 1991
[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
Eric Decker
cisco Systems, Inc.
1525 O'Brien Dr.
Menlo Park, CA 94025
Phone: (415) 688-8241
EMail: cire@cisco.com
Transmission Working Group PAGE 23
IEEE 802.5 Token Ring MIB
RFC TOTAL SIZE: 52252 bytes
PUBLICATION DATE: Friday, May 24th, 1991
LEGAL RIGHTS: The IETF Trust (see BCP 78)
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