Network Working Group T. Cox

Network Working Group T. Cox
Request for Comments: 1407 K. Tesink
Obsoletes: 1233 Bell Communications Research
Editors
January 1993

Definitions of Managed Objects
for the DS3/E3 Interface Type

Status of this Memo

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.

Abstract

This memo defines an extension to the Management Information Base
(MIB) for use with network management protocols in TCP/IP-based
internets. In particular, it defines objects for managing DS3 and E3
Interfaces. This document is a companion document with Definitions
of Managed Objects for the DS1 Interface Type.

This document entirely replaces RFC 1233, which contains a
fundamental error: many objects are encoded as Counters that must be
encoded as INTEGERs or Gauges. The magnitude of the change required
is sufficient that virtually every object changed. Therefore, the
MIB documented in RFC 1233 should not be implemented.

Table of Contents

1. The Network Management Framework ...................... 2
2. Objects ............................................... 2
2.1 Format of Definitions ................................ 3
2.2 Changes from RFC 1233 ................................ 3
3. Overview .............................................. 5
3.1 Binding between ifIndex and DS3/E3 Interfaces ........ 5
3.2 Objectives of this MIB Module ........................ 7
3.3 DS3/E3 Terminology ................................... 7
3.3.1 Error Events ....................................... 7
3.3.2 Performance Parameters ............................. 8
3.3.3 Performance Defects ................................ 10
3.3.4 Other Terms ........................................ 11
4. Object Definitions .................................... 12
4.1 The DS3/E3 Near End Group ............................ 12

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4.1.1 The DS3/E3 Configuration ........................... 12
4.1.2 The DS3/E3 Current ................................. 18
4.1.3 The DS3/E3 Interval ................................ 21
4.1.4 The DS3/E3 Total ................................... 25
4.2 The DS3 Far End Group ................................ 29
4.2.1 The DS3 Far End Configuration ...................... 29
4.2.2 The DS3 Far End Current ............................ 31
4.2.3 The DS3 Far End Interval ........................... 34
4.2.4 The DS3 Far End Total .............................. 36
4.3 The DS3/E3 Fractional Group .......................... 38
5. Acknowledgments ....................................... 41
6. References ............................................ 41
7. Security Considerations ............................... 43
8. Authors' Addresses .................................... 43

1. The Network Management Framework

The Internet-standard Network Management Framework consists of three
components. They are:

STD 16/RFC 1155 which defines the SMI, the mechanisms used for
describing and naming objects for the purpose of management. STD
16/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. STD 17/RFC 1213, defines MIB-II,
an evolution of MIB-I based on implementation experience and new
operational requirements.

STD 15/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.

2. 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.

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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.

2.1. Format of Definitions

Section 4 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 STD 16, RFC 1212 [13].

2.2. Changes from RFC 1233

This MIB obsoletes RFC 1233. The changes from RFC 1233 are the
following:

-- This MIB module contains information to manage
an E3 interface, also.

-- This MIB module contains three groups:
DS3/E3 Near End Group which is mandatory,
DS3 Far End Group which is optional, and
DS3 Fractional Group which is optional.

-- The DS3 Far End Group is a new group and contains
configuration information and statistics
that are collected from the far end DS3/E3 interface.
Presently, the Far End Group may only be implemented by
DS3 systems that use C-bit Parity or SYNTRAN.

-- The DS3 Fractional Group is a new group and is
modeled after the DS1 Fractional Group.

-- ds3CSUIndex has been redefined and renamed
to dsx3LineIndex. This object
is the identifier of a DS3/E3 Interface on a device.
On a CSU, a single DS3/E3 data stream will cross two DS3/E3
interfaces, which have separate dsx3LineIndex values.

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-- ds3Index has been redefined and renamed to
dsx3IfIndex. This value for this
object is equal to the value of ifIndex from the Interfaces
table of MIB II (STD 17, RFC 1213).

-- The ACCESS for objects in the dsx3ConfigTable has
been set to read-write for items that are configurable.

-- The dsx3ZeroCoding has been renamed to dsx3LineCoding.

-- A new object has been added called dsx3LoopbackConfig,
which better describes the loopback capabilities of
a DS3/E3 interface on a device.

-- The dsx3SendCode object has been updated to reflect
different types of loopback messages.

-- A new object has been added called dsx3LineStatus.
This object better describes the status (e.g.,
failure state and loopback state) of a
DS3/E3 interface.

-- A new object has been added called dsx3TransmitClockSource.
This object identifies the source for the transmit clock.

-- All Counters have been changed to Gauges.

-- A Line Errored Seconds object has been added to
all near end tables.

-- Line Coding Violations are counted instead of Bipolar
Violations.

-- A new Coding Violation counter has been added to count
coding violations reported via the C-bits of SYNTRAN
and C-bit Parity DS3 applications.
The original Coding Violation counter has been renamed
to PCV to mean coding violations reported via the P-bits.
This count is also added for symmetry with the far end
statistics.

-- A new Errored Second counter and Severely Errored Second
counter has been added to count these performance events
via the C-bits of the SYNTRAN and C-bit Parity DS3
applications. The original ES and SES counters have been
renamed to PES and PSES to mean reported via the P-bits.
These counts are also added for symmetry with the far end
statistics.

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3. Overview

These objects are used when the particular media being used to
realize an interface is a DS3/E3 interface. At present, this applies
to these values of the ifType variable in the Internet-standard MIB:

ds3 (30)

The DS3 definitions contained herein are based on the DS3
specifications in ANSI T1.102-1987, ANSI T1.107-1988, ANSI T1.107a-
1990, and ANSI T1.404-1989 [9,10,10a,11]. The E3 definitions
contained herein are based on the E3 specifications in CCITT G.751
[14].

3.1. Binding between ifIndex and DS3/E3 Interfaces

Different physical configurations for the support of SNMP with DS3/E3
equipment exist. To accommodate these scenarios, two different
indices for DS3/E3 interfaces are introduced in this MIB. These
indices are dsx3IfIndex and dsx3LineIndex.

External interface scenario: the SNMP Agent represents all managed
DS3/E3 lines as external interfaces (for example, an Agent residing
on the device supporting DS3/E3 interfaces directly):

For this scenario, all interfaces are assigned an integer value equal
to ifIndex, and the following applies:

ifIndex=dsx3IfIndex=dsx3LineIndex for all interfaces.

The dsx3IfIndex column of the DS3/E3 Configuration table relates each
DS3/E3 interface to its corresponding interface (ifIndex) in the
Internet-standard MIB (MIB-II STD 17, RFC 1213).

External&Internal interface scenario: the SNMP Agents resides on an
host external from the device supporting DS3/E3 interfaces (e.g., a
router). The Agent represents both the host and the DS3/E3 device.
The index dsx3LineIndex is used to not only represent the DS3/E3
interfaces external from the host/DS3/E3-device combination, but also
the DS3/E3 interfaces connecting the host and the DS3/E3 device. The
index dsx3IfIndex is always equal to ifIndex.

Example:

A shelf full of CSUs connected to a Router. An SNMP Agent residing on
the router proxies for itself and the CSU. The router has also an
Ethernet interface:

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+-----+
| | |
| | | +---------------------+
|E | | 44.736 MBPS | ds3 M13 Line#A | ds3 C-bit Parity
|t | R |---------------+ - - - - - - - - - +------>
|h | | | |
|e | O | 44.736 MBPS | ds3 M13 Line#B | ds3 C-bit Parity
|r | |---------------+ - - - - - - - - - - +------>
|n | U | | |
|e | | 44.736 MBPS | ds3 M13 Line#C | ds3 C-bit Parity
|t | T |---------------+ - - - -- -- - - - - +------>
| | | | |
|-----| E | 44.736 MBPS | ds3 M13 Line#D | ds3 C-bit Parity
| | |---------------+ - - - - -- - - - - +------>
| | R | |_____________________|
| | |
| +-----+

The assignment of the index values could for example be:

ifIndex (= dsx3IfIndex) dsx3LineIndex

1 NA NA (Ethernet)
2 Line#A Router Side 6
2 Line#A Network Side 7
3 Line#B Router Side 8
3 Line#B Network Side 9
4 Line#C Router Side 10
4 Line#C Network Side 11
5 Line#D Router Side 12
5 Line#D Network Side 13

For this example, ifNumber is equal to 5. Note the following
description of dsx3LineIndex: the dsx3LineIndex identifies a DS3/E3
Interface on a managed device. If there is an ifEntry that is
directly associated with this and only this DS3/E3 interface, it
should have the same value as ifIndex. Otherwise, number the
dsx3LineIndices with an unique identifier following the rules of
choosing a number greater than ifNumber and numbering inside
interfaces (e.g., equipment side) with even numbers and outside
interfaces (e.g., network side) with odd numbers.

If the CSU shelf is managed by itself by a local SNMP Agent, the
situation would be:

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ifIndex (= dsx3IfIndex) dsx3LineIndex

1 Line#A Network Side 1
2 Line#A RouterSide 2
3 Line#B Network Side 3
4 Line#B RouterSide 4
5 Line#C Network Side 5
6 Line#C Router Side 6
7 Line#D Network Side 7
8 Line#D Router Side 8

3.2. Objectives of this MIB Module

There are numerous things that could be included in a MIB for DS3/E3
signals: the management of multiplexors, CSUs, DSUs, and the like.
The intent of this document is to facilitate the common management of
all devices with DS3/E3 interfaces. As such, a design decision was
made up front to very closely align the MIB with the set of objects
that can generally be read from DS3/E3 devices that are currently
deployed.

3.3. DS3/E3 Terminology

The terminology used in this document to describe error conditions on
a DS3 interface as monitored by a DS3 device are based on the
definitions from the ANSI T1M1.3/92-005R1 draft standard [12]. If
the definition in this document does not match the definition in the
ANSI T1M1.3/92-005R1 draft document, the implementer should follow
the definition described in this document.

3.3.1. Error Events

Bipolar Violation (BPV) Error Event
A bipolar violation error event, for B3ZS(HDB3)-coded
signals, is the occurrence of a pulse of the same polarity
as the previous pulse without being part of the zero
substitution code, B3ZS(HDB3). For B3ZS(HDB3)-coded
signals, a bipolar violation error event may also include
other error patterns such as: three(four) or more
consecutive zeros and incorrect polarity.

Excessive Zeros (EXZ) Error Event
An EXZ is the occurrence of any zero string length equal
to or greater than 3 for B3ZS, or greater than 4 for HDB3.

Line Coding Violation (LCV) Error Event
This parameter is a count of both BPVs and EXZs
occurring over the accumulation period. An EXZ

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increments the LCV by one regardless of the length
of the zero string.

P-bit Coding Violation (PCV) Error Event
For all DS3 applications, a coding violation error
event is a P-bit
Parity Error event. A P-bit Parity Error event is the
occurrence of a received P-bit code on the DS3 M-frame
that is not identical to the corresponding locally-
calculated code.

C-bit Coding Violation (CCV) Error Event
For C-bit Parity and SYNTRAN DS3 applications, this is
the count of coding violations reported via the C-bits.
For C-bit Parity, it is a count of CP-bit parity errors
occurring in the accumulation interval. For SYNTRAN, it
is a count of CRC-9 errors occurring in the accumulation
interval.

3.3.2. Performance Parameters

All performance parameters are accumulated in fifteen minute
intervals and up to 96 intervals (24 hours worth) are kept by an
agent. Fewer than 96 intervals of data will be available if the
agent has been restarted within the last 24 hours. In addition,
there is a rolling 24-hour total of each performance parameter.

There is no requirement for an agent to ensure fixed relationship
between the start of a fifteen minute interval and any wall clock;
however some agents may align the fifteen minute intervals with
quarter hours.

Line Errored Seconds (LES)
A Line Errored Second is a second in
which one or more CVs occurred OR one or more LOS defects.

P-bit Errored Seconds (PES)
An PES is a second with one or more PCVs OR
one or more Out of Frame defects OR a detected incoming AIS.
This gauge is not incremented when UASs are counted.

P-bit Severely Errored Seconds (PSES)
A PSES is a second with 44 or more PCVs OR
one or more Out of Frame defects OR a detected incoming AIS.
This gauge is not incremented when UASs are counted.

C-bit Errored Seconds (CES)
An CES is a second with one or more CCVs OR

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one or more Out of Frame defects OR a detected incoming AIS.
This count is only for the SYNTRAN and C-bit Parity DS3
applications. This gauge is not incremented when UASs are
counted.

C-bit Severely Errored Seconds (CSES)
A CSES is a second with 44 or more CCVs OR
one or more Out of Frame defects OR a detected incoming AIS.
This count is only for the SYNTRAN and C-bit Parity DS3
applications. This gauge is not incremented when UASs
are counted.

Severely Errored Framing Seconds (SEFS)
A SEFS is a second with one or more Out of Frame defects
OR a detected incoming AIS.

Unavailable Seconds (UAS)
UAS are calculated by counting the number of seconds that
the interface is unavailable. The DS3 interface is said
to be unavailable from the onset of 10 contiguous PSESs, or
the onset of the condition leading to a failure (see Failure
States). If the condition leading to the failure was
immediately preceded by one or more contiguous PSESs, then
the DS3 interface unavailability starts from the onset of
these PSESs. Once unavailable, and if no failure is
present, the DS3 interface becomes available at the onset
of 10 contiguous seconds with no PSESs. Once unavailable,
and if a failure is present, the DS3 interface becomes
available at the onset of 10 contiguous seconds with no
PSESs, if the failure clearing time is less than
or equal to 10 seconds. If the failure clearing time is
more than 10 seconds, the DS3 interface becomes available
at the onset of 10 contiguous seconds with no PSESs, or
the onset period leading to the successful clearing
condition, whichever occurs later. With respect to the
DS3 error counts, all counters are incremented
while the DS3 interface is deemed available. While the
interface is deemed unavailable, the only count that is
incremented is UASs.

A special case exists when the 10 or more second period
crosses the 900 second statistics window boundary, as the
foregoing description implies that the PSES and UAS
counters must be adjusted when the Unavailable Signal
State is entered. Clearly, successive GETs of the
affected dsx3IntervalPSESs and dsx3IntervalUASs objects
will return differing values if the first GET occurs
during the first few seconds of the window. This is

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viewed as an unavoidable side-effect of selecting the
presently defined managed objects as a basis for this
memo.

3.3.3. Performance Defects

Failure States:
The Remote Alarm Indication (RAI) failure, in SYNTRAN
applications, is declared after detecting
the Yellow Alarm Signal on the alarm channel. See ANSI
T1.107a-1990 [10]. The Remote Alarm Indication failure,
in C-bit Parity DS3 applications, is declared
as soon as the preqsence of either one or two alarm signals
are detected on then Far End Alarm Channel. See [10].
The Remote Alarm Indication failure may also be declared
after detecting the far-end SEF/AIS defect (aka yellow).
The Remote Alarm Indication failure is cleared as soon as
the presence of the any of the above alarms are removed.

Also, the incoming failure state is declared when a defect
persists for at least 2-10 seconds. The defects are
the following: Loss of Signal (LOS), an Out of Frame (OOF)
or an incoming Alarm Indication Signal (AIS).
The Failure State is cleared when the defect is absent
for less than or equal to 20 seconds.

Far End SEF/AIS defect (aka yellow)
A Far End SEF/AIS defect is the occurrence of the two X-bits
in a M-frame set to zero. The Far End SEF/AIS defect is
terminated when the two X-bits in a M-frame are set to
one.

Out of Frame (OOF) defect
A DS3 OOF defect is detected when any three or more errors
in sixteen or fewer consecutive F-bits occur within a DS3
M-frame. An OOF defect may also be called a Severely
Errored Frame (SEF) defect. An OOF defect is cleared when
reframe occurs. A DS3 Loss of Frame (LOF) failure is
declared when the DS3 OOF defect is consistent for 2 to 10
seconds. The DS3 OOF defect ends when reframe occurs.
The DS3 LOF failure is cleared when the DS3 OOF
defect is absent for 10 to 20 seconds.

An E3 OOF defect is detected when four consecutive frame
alignment signals have been incorrectly received in there
predicted positions in an E3 signal. E3 frame alignment
occurs when the presence of three consecutive frame
alignment signals have been detected.

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Loss of Signal (LOS) defect
The DS3 LOS defect is declared upon observing 175 +/- 75
contiguous pulse positions with no pulses of either
positive or negative polarity.
The DS3 LOS defect is terminated upon observing an average
pulse density of at least 33% over a period of 175 +/- 75
contiguous pulse positions starting with the receipt of a
pulse.

Alarm Indication Signal (AIS) defect
The DS3 AIS is framed with "stuck stuffing." This implies
that it has a valid M-subframe alignments bits, M-frame
alignment bits, and P bits. The information bits are set
to a 1010... sequence, starting with a one (1) after each
M-subframe alignment bit, M-frame alignment bit, X bit, P
bit, and C bit. The C bits are all set to zero giving
what is called "stuck stuffing." The X bits are set to
one. The DS3 AIS defect is declared after DS3 AIS is
present in contiguous M-frames for a time equal to or
greater than T, where 0.2 ms <= T <= 100 ms.
The DS3 AIS defect is terminated after AIS is absent in
contiguous M-frames for a time equal to or greater than T.

The E3 binary content of the AIS is nominally a continuous
stream of ones. AIS detection and the application of
consequent actions, should be completed within a time
limit of 1 ms.

3.3.4. Other Terms

Circuit Identifier
This is a character string specified by the circuit
vendor, and is useful when communicating with the vendor
during the troubleshooting process.

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4. Object Definitions

RFC1407-MIB DEFINITIONS ::= BEGIN

IMPORTS
Gauge
FROM RFC1155-SMI
DisplayString, transmission
FROM RFC1213-MIB
OBJECT-TYPE
FROM RFC-1212;

-- This MIB module uses the extended OBJECT-TYPE macro
-- as defined in RFC 1212.

ds3 OBJECT IDENTIFIER ::= { transmission 30 }

-- The DS3/E3 Near End Group

-- Implementation of this group is mandatory for all
-- systems that attach to a DS3/E3 Interface.

-- The DS3/E3 Near End Group consists of four tables:
-- DS3/E3 Configuration
-- DS3/E3 Current
-- DS3/E3 Interval
-- DS3/E3 Total

-- the DS3/E3 Configuration

dsx3ConfigTable OBJECT-TYPE
SYNTAX SEQUENCE OF Dsx3ConfigEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"The DS3/E3 Configuration table."
::= { ds3 5 }

dsx3ConfigEntry OBJECT-TYPE
SYNTAX Dsx3ConfigEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"An entry in the DS3/E3 Configuration table."
INDEX { dsx3LineIndex }
::= { dsx3ConfigTable 1 }

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Dsx3ConfigEntry ::=
SEQUENCE {
dsx3LineIndex
INTEGER,
dsx3IfIndex
INTEGER,
dsx3TimeElapsed
INTEGER,
dsx3ValidIntervals
INTEGER,
dsx3LineType
INTEGER,
dsx3LineCoding
INTEGER,
dsx3SendCode
INTEGER,
dsx3CircuitIdentifier
DisplayString,
dsx3LoopbackConfig
INTEGER,
dsx3LineStatus
INTEGER,
dsx3TransmitClockSource
INTEGER
}

dsx3LineIndex OBJECT-TYPE
SYNTAX INTEGER (1..65535)
ACCESS read-only
STATUS mandatory
DESCRIPTION
"This object is the identifier of a DS3/E3
Interface on a managed device. If there is an
ifEntry that is directly associated with this
and only this DS3/E3 interface, it should have
the same value as ifIndex. Otherwise, number
the dsx3LineIndices with an unique identifier
following the rules of choosing a number that
is greater than ifNumber and numbering the
inside interfaces (e.g., equipment side) with
even numbers and outside interfaces (e.g,
network side) with odd numbers."
::= { dsx3ConfigEntry 1 }

dsx3IfIndex OBJECT-TYPE
SYNTAX INTEGER (1..65535)
ACCESS read-only
STATUS mandatory

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DESCRIPTION
"This value for this object is equal to the
value of ifIndex from the Interfaces table of
MIB II (RFC 1213)."
::= { dsx3ConfigEntry 2 }

dsx3TimeElapsed OBJECT-TYPE
SYNTAX INTEGER (0..899)
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of seconds that have elapsed since
the beginning of the near end current error-
measurement period."
::= { dsx3ConfigEntry 3 }

dsx3ValidIntervals OBJECT-TYPE
SYNTAX INTEGER (0..96)
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of previous near end intervals for
which valid data was collected. The value will be
96 unless the interface was brought online within
the last 24 hours, in which case the value will be
the number of complete 15 minute near end
intervals since the interface has been online."
::= { dsx3ConfigEntry 4 }

dsx3LineType OBJECT-TYPE
SYNTAX INTEGER {
dsx3other(1),
dsx3M23(2),
dsx3SYNTRAN(3),
dsx3CbitParity(4),
dsx3ClearChannel(5),
e3other(6),
e3Framed(7),
e3Plcp(8)
}
ACCESS read-write
STATUS mandatory
DESCRIPTION
"This variable indicates the variety of DS3 C-bit
or E3 application
implementing this interface. The type of
interface affects the interpretation of the
usage and error statistics.

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The rate of DS3 is 44.736 Mbps and E3 is
34.368 Mbps.
The dsx3ClearChannel value means that the C-bits
are not used except for sending/receiving
AIS.

The values, in sequence, describe:

TITLE: SPECIFICATION:
dsx3M23 ANSI T1.107-1988
dsx3SYNTRAN ANSI T1.107-1988
dsx3CbitParity ANSI T1.107a-1989
dsx3ClearChannel ANSI T1.102-1987
e3Framed CCITT G.751
e3Plcp ETSI T/NA(91)18."
::= { dsx3ConfigEntry 5 }

dsx3LineCoding OBJECT-TYPE
SYNTAX INTEGER {
dsx3Other(1),
dsx3B3ZS(2),
e3HDB3(3)
}
ACCESS read-write
STATUS mandatory
DESCRIPTION
"This variable describes the variety of Zero Code
Suppression used on this interface, which in turn
affects a number of its characteristics.

dsx3B3ZS and e3HDB3 refer to the use of specified
patterns of normal bits and bipolar violations
which are used to replace sequences of zero bits
of a specified length."
::= { dsx3ConfigEntry 6 }

dsx3SendCode OBJECT-TYPE
SYNTAX INTEGER {
dsx3SendNoCode(1),
dsx3SendLineCode(2),
dsx3SendPayloadCode(3),
dsx3SendResetCode(4),
dsx3SendDS1LoopCode(5),
dsx3SendTestPattern(6)
}
ACCESS read-write
STATUS mandatory
DESCRIPTION

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"This variable indicates what type of code is
being sent across the DS3/E3 interface by the
device. (These are optional for E3 interfaces.)
The values mean:

dsx3SendNoCode
sending looped or normal data

dsx3SendLineCode
sending a request for a line loopback

dsx3SendPayloadCode
sending a request for a payload loopback
(i.e., all DS1/E1s in a DS3/E3 frame)

dsx3SendResetCode
sending a loopback deactivation request

dsx3SendDS1LoopCode
requesting to loopback a particular DS1/E1
within a DS3/E3 frame

dsx3SendTestPattern
sending a test pattern."
::= { dsx3ConfigEntry 7 }

dsx3CircuitIdentifier OBJECT-TYPE
SYNTAX DisplayString (SIZE (0..255))
ACCESS read-write
STATUS mandatory
DESCRIPTION
"This variable contains the transmission vendor's
circuit identifier, for the purpose of
facilitating troubleshooting."
::= { dsx3ConfigEntry 8 }

dsx3LoopbackConfig OBJECT-TYPE
SYNTAX INTEGER {
dsx3NoLoop(1),
dsx3PayloadLoop(2),
dsx3LineLoop(3),
dsx3OtherLoop(4)
}
ACCESS read-write
STATUS mandatory
DESCRIPTION
"This variable represents the loopback configuration
of the DS3/E3 interface.

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RFC 1407 DS3/E3 MIB January 1993

The values mean:

dsx3NoLoop
Not in the loopback state. A device that is
not capable of performing a loopback on
the interface shall always return this as
it's value.

dsx3PayloadLoop
The received signal at this interface is looped
through the device.
Typically the received signal
is looped back for retransmission after it has
passed through the device's framing function.

dsx3LineLoop
The received signal at this interface does not
go through the device (minimum penetration) but
is looped back out.

dsx3OtherLoop
Loopbacks that are not defined here."
::= { dsx3ConfigEntry 9 }

dsx3LineStatus OBJECT-TYPE
SYNTAX INTEGER (1..1023)
ACCESS read-only
STATUS mandatory
DESCRIPTION
"This variable indicates the
Line Status of the interface.
It contains loopback state information
and failure state information.
The dsx3LineStatus is a bit map represented
as a sum, therefore,
it can represent multiple failures
and a loopback (see dsx3LoopbackConfig object
for the type of loopback)
simultaneously.
The dsx3NoAlarm should be set if and only if
no other flag is set.

The various bit positions are:
1 dsx3NoAlarm No alarm present
2 dsx3RcvRAIFailure Receiving Yellow/Remote
Alarm Indication
4 dsx3XmitRAIAlarm Transmitting Yellow/Remote
Alarm Indication

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RFC 1407 DS3/E3 MIB January 1993

8 dsx3RcvAIS Receiving AIS failure state
16 dsx3XmitAIS Transmitting AIS
32 dsx3LOF Receiving LOF failure state
64 dsx3LOS Receiving LOS failure state
128 dsx3LoopbackState Looping the received signal
256 dsx3RcvTestCode Receiving a Test Pattern
512 dsx3OtherFailure any line status not defined
here"
::= { dsx3ConfigEntry 10 }

dsx3TransmitClockSource OBJECT-TYPE
SYNTAX INTEGER {
loopTiming(1),
localTiming(2),
throughTiming(3)
}
ACCESS read-write
STATUS mandatory
DESCRIPTION
"The source of Transmit Clock.
is derived from the recovered receive clock of
another DS3 interface."
::= { dsx3ConfigEntry 11 }

-- the DS3/E3 Current

-- The DS3/E3 current table contains various statistics being
-- collected for the current 15 minute interval.

dsx3CurrentTable OBJECT-TYPE
SYNTAX SEQUENCE OF Dsx3CurrentEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"The DS3/E3 Current table."
::= { ds3 6 }

dsx3CurrentEntry OBJECT-TYPE
SYNTAX Dsx3CurrentEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"An entry in the DS3/E3 Current table."
INDEX { dsx3CurrentIndex }
::= { dsx3CurrentTable 1 }

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RFC 1407 DS3/E3 MIB January 1993

Dsx3CurrentEntry ::=
SEQUENCE {
dsx3CurrentIndex
INTEGER,
dsx3CurrentPESs
Gauge,
dsx3CurrentPSESs
Gauge,
dsx3CurrentSEFSs
Gauge,
dsx3CurrentUASs
Gauge,
dsx3CurrentLCVs
Gauge,
dsx3CurrentPCVs
Gauge,
dsx3CurrentLESs
Gauge,
dsx3CurrentCCVs
Gauge,
dsx3CurrentCESs
Gauge,
dsx3CurrentCSESs
Gauge
}

dsx3CurrentIndex OBJECT-TYPE
SYNTAX INTEGER (1..65535)
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The index value which uniquely identifies the
DS3/E3 interface to which this entry is
applicable. The interface identified by a
particular value of this index is the same
interface as identified by the same value an
dsx3LineIndex object instance."
::= { dsx3CurrentEntry 1 }

dsx3CurrentPESs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The counter associated with the number of P-bit
Errored Seconds, encountered by a DS3 interface in
the current 15 minute interval."
::= { dsx3CurrentEntry 2 }

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RFC 1407 DS3/E3 MIB January 1993

dsx3CurrentPSESs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The counter associated with the number of P-bit
Severely Errored Seconds, encountered by a DS3
interface in the current 15 minute interval."
::= { dsx3CurrentEntry 3 }

dsx3CurrentSEFSs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The counter associated with the number of
Severely Errored Framing Seconds, encountered by a
DS3/E3 interface in the current 15 minute
interval."
::= { dsx3CurrentEntry 4 }

dsx3CurrentUASs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The counter associated with the number of
Unavailable Seconds, encountered by a DS3
interface in the current 15 minute interval."
::= { dsx3CurrentEntry 5 }

dsx3CurrentLCVs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The counter associated with the number of Line
Coding Violations encountered by a DS3/E3
interface in the current 15 minute interval."
::= { dsx3CurrentEntry 6 }

dsx3CurrentPCVs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The counter associated with the number of P-bit
Coding Violations, encountered by a DS3 interface

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RFC 1407 DS3/E3 MIB January 1993

in the current 15 minute interval."
::= { dsx3CurrentEntry 7 }

dsx3CurrentLESs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of Line Errored Seconds encountered by
a DS3/E3 interface in the current 15 minute
interval."
::= { dsx3CurrentEntry 8 }

dsx3CurrentCCVs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of C-bit Coding Violations encountered
by a DS3 interface in the current 15 minute
interval."
::= { dsx3CurrentEntry 9 }

dsx3CurrentCESs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of C-bit Errored Seconds encountered
by a DS3 interface in the current 15 minute
interval."
::= { dsx3CurrentEntry 10 }

dsx3CurrentCSESs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of C-bit Severely Errored Seconds
encountered by a DS3 interface in the current 15
minute interval."
::= { dsx3CurrentEntry 11 }

-- the DS3/E3 Interval

-- The DS3/E3 Interval Table contains various statistics
-- collected by each DS3/E3 Interface over the previous 24

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RFC 1407 DS3/E3 MIB January 1993

-- hours of operation. The past 24 hours are broken into 96
-- completed 15 minute intervals.

dsx3IntervalTable OBJECT-TYPE
SYNTAX SEQUENCE OF Dsx3IntervalEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"The DS3/E3 Interval table."
::= { ds3 7 }

dsx3IntervalEntry OBJECT-TYPE
SYNTAX Dsx3IntervalEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"An entry in the DS3/E3 Interval table."
INDEX { dsx3IntervalIndex, dsx3IntervalNumber }
::= { dsx3IntervalTable 1 }

Dsx3IntervalEntry ::=
SEQUENCE {
dsx3IntervalIndex
INTEGER,
dsx3IntervalNumber
INTEGER,
dsx3IntervalPESs
Gauge,
dsx3IntervalPSESs
Gauge,
dsx3IntervalSEFSs
Gauge,
dsx3IntervalUASs
Gauge,
dsx3IntervalLCVs
Gauge,
dsx3IntervalPCVs
Gauge,
dsx3IntervalLESs
Gauge,
dsx3IntervalCCVs
Gauge,
dsx3IntervalCESs
Gauge,
dsx3IntervalCSESs
Gauge
}

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RFC 1407 DS3/E3 MIB January 1993

dsx3IntervalIndex OBJECT-TYPE
SYNTAX INTEGER (1..65535)
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The index value which uniquely identifies the
DS3/E3 interface to which this entry is
applicable. The interface identified by a
particular value of this index is the same
interface as identified by the same value an
dsx3LineIndex object instance."
::= { dsx3IntervalEntry 1 }

dsx3IntervalNumber OBJECT-TYPE
SYNTAX INTEGER (1..96)
ACCESS read-only
STATUS mandatory
DESCRIPTION
"A number between 1 and 96, where 1 is the most
recently completed 15 minute interval and 96 is
the least recently completed 15 minutes interval
(assuming that all 96 intervals are valid)."
::= { dsx3IntervalEntry 2 }

dsx3IntervalPESs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The counter associated with the number of P-bit
Errored Seconds, encountered by a DS3 interface in
one of the previous 96, individual 15 minute,
intervals."
::= { dsx3IntervalEntry 3 }

dsx3IntervalPSESs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The counter associated with the number of P-bit
Severely Errored Seconds, encountered by a DS3
interface in one of the previous 96, individual 15
minute, intervals."
::= { dsx3IntervalEntry 4 }

dsx3IntervalSEFSs OBJECT-TYPE
SYNTAX Gauge

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RFC 1407 DS3/E3 MIB January 1993

ACCESS read-only
STATUS mandatory
DESCRIPTION
"The counter associated with the number of
Severely Errored Framing Seconds, encountered by a
DS3/E3 interface in one of the previous 96,
individual 15 minute, intervals."
::= { dsx3IntervalEntry 5 }

dsx3IntervalUASs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The counter associated with the number of
Unavailable Seconds, encountered by a DS3
interface in one of the previous 96, individual 15
minute, intervals."
::= { dsx3IntervalEntry 6 }

dsx3IntervalLCVs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The counter associated with the number of Line
Coding Violations encountered by a DS3/E3
interface in one of the previous 96, individual 15
minute, intervals."
::= { dsx3IntervalEntry 7 }

dsx3IntervalPCVs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The counter associated with the number of P-bit
Coding Violations, encountered by a DS3 interface
in one of the previous 96, individual 15 minute,
intervals."
::= { dsx3IntervalEntry 8 }

dsx3IntervalLESs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of Line Errored Seconds (BPVs or

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RFC 1407 DS3/E3 MIB January 1993

illegal zero sequences) encountered by a DS3/E3
interface in one of the previous 96, individual
15 minute, intervals."
::= { dsx3IntervalEntry 9 }

dsx3IntervalCCVs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of C-bit Coding Violations encountered
by a DS3 interface in one of the previous 96,
individual 15 minute, intervals."
::= { dsx3IntervalEntry 10 }

dsx3IntervalCESs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of C-bit Errored Seconds encountered
by a DS3 interface in one of the previous 96,
individual 15 minute, intervals."
::= { dsx3IntervalEntry 11 }

dsx3IntervalCSESs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of C-bit Severely Errored Seconds
encountered by a DS3 interface in one of the
previous 96, individual 15 minute, intervals."
::= { dsx3IntervalEntry 12 }

-- the DS3/E3 Total

-- The DS3/E3 Total Table contains the cumulative sum of the
-- various statistics for the 24 hour period preceding the
-- current interval.

dsx3TotalTable OBJECT-TYPE
SYNTAX SEQUENCE OF Dsx3TotalEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"The DS3/E3 Total table. 24 hour interval."

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RFC 1407 DS3/E3 MIB January 1993

::= { ds3 8 }

dsx3TotalEntry OBJECT-TYPE
SYNTAX Dsx3TotalEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"An entry in the DS3/E3 Total table."
INDEX { dsx3TotalIndex }
::= { dsx3TotalTable 1 }

Dsx3TotalEntry ::=
SEQUENCE {
dsx3TotalIndex
INTEGER,
dsx3TotalPESs
Gauge,
dsx3TotalPSESs
Gauge,
dsx3TotalSEFSs
Gauge,
dsx3TotalUASs
Gauge,
dsx3TotalLCVs
Gauge,
dsx3TotalPCVs
Gauge,
dsx3TotalLESs
Gauge,
dsx3TotalCCVs
Gauge,
dsx3TotalCESs
Gauge,
dsx3TotalCSESs
Gauge
}

dsx3TotalIndex OBJECT-TYPE
SYNTAX INTEGER (1..65535)
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The index value which uniquely identifies the
DS3/E3 interface to which this entry is
applicable. The interface identified by a
particular value of this index is the same
interface as identified by the same value an
dsx3LineIndex object instance."

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RFC 1407 DS3/E3 MIB January 1993

::= { dsx3TotalEntry 1 }

dsx3TotalPESs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The counter associated with the number of P-bit
Errored Seconds, encountered by a DS3 interface in
the previous 24 hour interval"
::= { dsx3TotalEntry 2 }

dsx3TotalPSESs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The counter associated with the number of P-bit
Severely Errored Seconds, encountered by a DS3
interface in the previous 24 hour interval."
::= { dsx3TotalEntry 3 }

dsx3TotalSEFSs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The counter associated with the number of
Severely Errored Framing Seconds, encountered by a
DS3/E3 interface in the previous 24 hour
interval."
::= { dsx3TotalEntry 4 }

dsx3TotalUASs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The counter associated with the number of
Unavailable Seconds, encountered by a DS3
interface in the previous 24 hour interval."
::= { dsx3TotalEntry 5 }

dsx3TotalLCVs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION

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RFC 1407 DS3/E3 MIB January 1993

"The counter associated with the number of Line
Coding Violations encountered by a DS3/E3
interface in the previous 24 hour interval."
::= { dsx3TotalEntry 6 }

dsx3TotalPCVs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The counter associated with the number of P-bit
Coding Violations, encountered by a DS3 interface
in the previous 24 hour interval."
::= { dsx3TotalEntry 7 }

dsx3TotalLESs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of Line Errored Seconds (BPVs or
illegal zero sequences) encountered by a DS3/E3
interface in the previous 24 hour interval."
::= { dsx3TotalEntry 8 }

dsx3TotalCCVs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of C-bit Coding Violations encountered
by a DS3 interface in the previous 24 hour
interval."
::= { dsx3TotalEntry 9 }

dsx3TotalCESs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of C-bit Errored Seconds encountered
by a DS3 interface in the previous 24 hour
interval."
::= { dsx3TotalEntry 10 }

dsx3TotalCSESs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only

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RFC 1407 DS3/E3 MIB January 1993

STATUS mandatory
DESCRIPTION
"The number of C-bit Severely Errored Seconds
encountered by a DS3 interface in the previous 24
hour interval."
::= { dsx3TotalEntry 11 }

-- The DS3 Far End Group

-- Implementation of this group is optional for all systems
-- that attach to a DS3 Interface.
-- However, only C-bit Parity and SYNTRAN DS3 applications
-- have the capability (option) of providing this information.

-- The DS3 Far End Group consists of four tables:
-- DS3 Far End Configuration
-- DS3 Far End Current
-- DS3 Far End Interval
-- DS3 Far End Total

-- The DS3 Far End Configuration Table contains
-- configuration information
-- reported in the C-bits from the remote end.

dsx3FarEndConfigTable OBJECT-TYPE
SYNTAX SEQUENCE OF Dsx3FarEndConfigEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"The DS3 Far End Configuration table."
::= { ds3 9 }

dsx3FarEndConfigEntry OBJECT-TYPE
SYNTAX Dsx3FarEndConfigEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"An entry in the DS3 Far End Configuration table."
INDEX { dsx3FarEndLineIndex }
::= { dsx3FarEndConfigTable 1 }

Dsx3FarEndConfigEntry ::=
SEQUENCE {
dsx3FarEndLineIndex
INTEGER,
dsx3FarEndEquipCode

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RFC 1407 DS3/E3 MIB January 1993

DisplayString,
dsx3FarEndLocationIDCode
DisplayString,
dsx3FarEndFrameIDCode
DisplayString,
dsx3FarEndUnitCode
DisplayString,
dsx3FarEndFacilityIDCode
DisplayString
}

dsx3FarEndLineIndex OBJECT-TYPE
SYNTAX INTEGER (1..65535)
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The index value which uniquely identifies the
DS3 interface
to which this entry is applicable. The
interface identified by a particular value of
this index is the same interface as identified
by the same value an dsx3LineIndex object
instance."
::= { dsx3FarEndConfigEntry 1 }

dsx3FarEndEquipCode OBJECT-TYPE
SYNTAX DisplayString (SIZE (0..10))
ACCESS read-write
STATUS mandatory
DESCRIPTION
"This is the Far End Equipment Identification code
that describes the specific piece of equipment.
It is sent within the Path
Identification Message."
::= { dsx3FarEndConfigEntry 2 }

dsx3FarEndLocationIDCode OBJECT-TYPE
SYNTAX DisplayString (SIZE (0..11))
ACCESS read-write
STATUS mandatory
DESCRIPTION
"This is the Far End Location Identification code
that describes the specific location of the
equipment.
It is sent within the Path
Identification Message."
::= { dsx3FarEndConfigEntry 3 }

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RFC 1407 DS3/E3 MIB January 1993

dsx3FarEndFrameIDCode OBJECT-TYPE
SYNTAX DisplayString (SIZE (0..10))
ACCESS read-write
STATUS mandatory
DESCRIPTION
"This is the Far End Frame Identification code
that identifies where the equipment is located
within a building at a given location.
It is sent within the Path
Identification Message."
::= { dsx3FarEndConfigEntry 4 }

dsx3FarEndUnitCode OBJECT-TYPE
SYNTAX DisplayString (SIZE (0..6))
ACCESS read-write
STATUS mandatory
DESCRIPTION
"This is the Far End code
that identifies the equipment location within a bay.
It is sent within the Path
Identification Message."
::= { dsx3FarEndConfigEntry 5 }

dsx3FarEndFacilityIDCode OBJECT-TYPE
SYNTAX DisplayString (SIZE (0..38))
ACCESS read-write
STATUS mandatory
DESCRIPTION
"This code identifies a specific Far End DS3 path.
It is sent within the Path
Identification Message."
::= { dsx3FarEndConfigEntry 6 }

-- The DS3 Far End Current

-- The DS3 Far End Current table contains various statistics
-- being collected for the current 15 minute interval.
-- The statistics are collected from the far end block error
-- code within the C-bits.

dsx3FarEndCurrentTable OBJECT-TYPE
SYNTAX SEQUENCE OF Dsx3FarEndCurrentEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"The DS3 Far End Current table."
::= { ds3 10 }

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RFC 1407 DS3/E3 MIB January 1993

dsx3FarEndCurrentEntry OBJECT-TYPE
SYNTAX Dsx3FarEndCurrentEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"An entry in the DS3 Far End Current table."
INDEX { dsx3FarEndCurrentIndex }
::= { dsx3FarEndCurrentTable 1 }

Dsx3FarEndCurrentEntry ::=
SEQUENCE {
dsx3FarEndCurrentIndex
INTEGER,
dsx3FarEndTimeElapsed
INTEGER,
dsx3FarEndValidIntervals
INTEGER,
dsx3FarEndCurrentCESs
Gauge,
dsx3FarEndCurrentCSESs
Gauge,
dsx3FarEndCurrentCCVs
Gauge,
dsx3FarEndCurrentUASs
Gauge
}

dsx3FarEndCurrentIndex OBJECT-TYPE
SYNTAX INTEGER (1..65535)
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The index value which uniquely identifies the
DS3 interface
to which this entry is applicable. The interface
identified by a particular value of this index is
the same interface as identified by the same value
an dsx3LineIndex object instance."
::= { dsx3FarEndCurrentEntry 1 }

dsx3FarEndTimeElapsed OBJECT-TYPE
SYNTAX INTEGER (0..899)
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of seconds that have elapsed since the
beginning of the far end current error-measurement
period."

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RFC 1407 DS3/E3 MIB January 1993

::= { dsx3FarEndCurrentEntry 2 }

dsx3FarEndValidIntervals OBJECT-TYPE
SYNTAX INTEGER (0..96)
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of previous far end intervals for
which valid data was collected. The value will be
96 unless the interface was brought online within
the last 24 hours, in which case the value will be
the number of complete 15 minute far end intervals
since the interface has been online."
::= { dsx3FarEndCurrentEntry 3 }

dsx3FarEndCurrentCESs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The counter associated with the number of Far
Far End C-bit Errored Seconds encountered by a DS3
interface in the current 15 minute interval."
::= { dsx3FarEndCurrentEntry 4 }

dsx3FarEndCurrentCSESs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The counter associated with the number of
Far End C-bit Severely Errored Seconds
encountered by a DS3 interface in the current 15
minute interval."
::= { dsx3FarEndCurrentEntry 5 }

dsx3FarEndCurrentCCVs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The counter associated with the number of
Far End C-bit Coding Violations reported via
the far end block error count
encountered by a
DS3 interface in the current 15 minute interval."
::= { dsx3FarEndCurrentEntry 6 }

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RFC 1407 DS3/E3 MIB January 1993

dsx3FarEndCurrentUASs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The counter associated with the number of
Far End unavailable seconds
encountered by a
DS3 interface in the current 15 minute interval."
::= { dsx3FarEndCurrentEntry 7 }

-- The DS3 Far End Interval

-- The DS3 Far End Interval Table contains various statistics
-- collected by each DS3 interface over the previous 24
-- hours of operation. The past 24 hours are broken into 96
-- completed 15 minute intervals.

dsx3FarEndIntervalTable OBJECT-TYPE
SYNTAX SEQUENCE OF Dsx3FarEndIntervalEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"The DS3 Far End Interval table."
::= { ds3 11 }

dsx3FarEndIntervalEntry OBJECT-TYPE
SYNTAX Dsx3FarEndIntervalEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"An entry in the DS3 Far
End Interval table."
INDEX { dsx3FarEndIntervalIndex,
dsx3FarEndIntervalNumber }
::= { dsx3FarEndIntervalTable 1 }

Dsx3FarEndIntervalEntry ::=
SEQUENCE {
dsx3FarEndIntervalIndex
INTEGER,
dsx3FarEndIntervalNumber
INTEGER,
dsx3FarEndIntervalCESs
Gauge,
dsx3FarEndIntervalCSESs
Gauge,

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RFC 1407 DS3/E3 MIB January 1993

dsx3FarEndIntervalCCVs
Gauge,
dsx3FarEndIntervalUASs
Gauge
}

dsx3FarEndIntervalIndex OBJECT-TYPE
SYNTAX INTEGER (1..65535)
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The index value which uniquely identifies the
DS3 interface
to which this entry is applicable. The
interface identified by a particular value of
this index is the same interface as identified
by the same value an dsx3LineIndex object
instance."
::= { dsx3FarEndIntervalEntry 1 }

dsx3FarEndIntervalNumber OBJECT-TYPE
SYNTAX INTEGER (1..96)
ACCESS read-only
STATUS mandatory
DESCRIPTION
"A number between 1 and 96, where 1 is the most
recently completed 15 minute interval and 96 is
the least recently completed 15 minutes
interval (assuming that all 96 intervals are
valid)."
::= { dsx3FarEndIntervalEntry 2 }

dsx3FarEndIntervalCESs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The counter associated with the number of
Far End C-bit Errored Seconds encountered
by a DS3 interface in one of the previous 96,
individual 15 minute, intervals."
::= { dsx3FarEndIntervalEntry 3 }

dsx3FarEndIntervalCSESs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION

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RFC 1407 DS3/E3 MIB January 1993

"The counter associated with the number of
Far End C-bit Severely Errored Seconds
encountered by a DS3 interface in one of the
previous 96, individual 15 minute, intervals."
::= { dsx3FarEndIntervalEntry 4 }

dsx3FarEndIntervalCCVs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The counter associated with the number of
Far End C-bit Coding Violations reported via
the far end block error count
encountered by a
DS3 interface in one of the previous 96,
individual 15 minute, intervals."
::= { dsx3FarEndIntervalEntry 5 }

dsx3FarEndIntervalUASs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The counter associated with the number of
Far End unavailable seconds
encountered by a
DS3 interface in one of the previous 96,
individual 15 minute, intervals."
::= { dsx3FarEndIntervalEntry 6 }

-- The DS3 Far End Total

-- The DS3 Far End Total Table contains the cumulative sum
-- of the various statistics for the 24 hour period preceding
-- the current interval.

dsx3FarEndTotalTable OBJECT-TYPE
SYNTAX SEQUENCE OF Dsx3FarEndTotalEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"The DS3 Far End Total table. 24 hour interval."
::= { ds3 12 }

dsx3FarEndTotalEntry OBJECT-TYPE
SYNTAX Dsx3FarEndTotalEntry

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RFC 1407 DS3/E3 MIB January 1993

ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"An entry in the DS3 Far End Total table."
INDEX { dsx3FarEndTotalIndex }
::= { dsx3FarEndTotalTable 1 }

Dsx3FarEndTotalEntry ::=
SEQUENCE {
dsx3FarEndTotalIndex
INTEGER,
dsx3FarEndTotalCESs
Gauge,
dsx3FarEndTotalCSESs
Gauge,
dsx3FarEndTotalCCVs
Gauge,
dsx3FarEndTotalUASs
Gauge
}

dsx3FarEndTotalIndex OBJECT-TYPE
SYNTAX INTEGER (1..65535)
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The index value which uniquely identifies the
DS3 interface
to which this entry is applicable. The interface
identified by a particular value of this index is
the same interface as identified by the same value
an dsx3LineIndex object instance."
::= { dsx3FarEndTotalEntry 1 }

dsx3FarEndTotalCESs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The counter associated with the number of Far
End C-bit Errored Seconds encountered by a DS3
interface in the previous 24 hour interval."
::= { dsx3FarEndTotalEntry 2 }

dsx3FarEndTotalCSESs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory

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RFC 1407 DS3/E3 MIB January 1993

DESCRIPTION
"The counter associated with the number of
Far End C-bit Severely Errored Seconds
encountered by a DS3 interface in the previous 24
hour interval."
::= { dsx3FarEndTotalEntry 3 }

dsx3FarEndTotalCCVs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The counter associated with the number of
Far End C-bit Coding Violations reported via the
far end block error count
encountered by a
DS3 interface in the previous 24 hour interval."
::= { dsx3FarEndTotalEntry 4 }

dsx3FarEndTotalUASs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The counter associated with the number of
Far End unavailable seconds
encountered by a
DS3 interface in the previous 24 hour interval."
::= { dsx3FarEndTotalEntry 5 }

-- the DS3/E3 Fractional Group

-- Implementation of this group is optional. It is designed
-- for those systems dividing a DS3/E3 into channels
-- containing different data streams that are of local
-- interest.

-- The DS3/E3 fractional table identifies which DS3/E3
-- channels associated with a CSU are being used to
-- support a logical interface, i.e., an entry in the
-- interfaces table from the Internet-standard MIB.

-- For example, consider a DS3 device with 4 high speed links
-- carrying router traffic, a feed for voice, a feed for
-- video, and a synchronous channel for a non-routed
-- protocol.
-- We might describe the allocation of channels, in the

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RFC 1407 DS3/E3 MIB January 1993

-- dsx3FracTable, as follows:

-- dsx3FracIfIndex.2. 1 = 3 dsx3FracIfIndex.2.15 = 4
-- dsx3FracIfIndex.2. 2 = 3 dsx3FracIfIndex.2.16 = 6
-- dsx3FracIfIndex.2. 3 = 3 dsx3FracIfIndex.2.17 = 6
-- dsx3FracIfIndex.2. 4 = 3 dsx3FracIfIndex.2.18 = 6
-- dsx3FracIfIndex.2. 5 = 3 dsx3FracIfIndex.2.19 = 6
-- dsx3FracIfIndex.2. 6 = 3 dsx3FracIfIndex.2.20 = 6
-- dsx3FracIfIndex.2. 7 = 4 dsx3FracIfIndex.2.21 = 6
-- dsx3FracIfIndex.2. 8 = 4 dsx3FracIfIndex.2.22 = 6
-- dsx3FracIfIndex.2. 9 = 4 dsx3FracIfIndex.2.23 = 6
-- dsx3FracIfIndex.2.10 = 4 dsx3FracIfIndex.2.24 = 6
-- dsx3FracIfIndex.2.11 = 4 dsx3FracIfIndex.2.25 = 6
-- dsx3FracIfIndex.2.12 = 5 dsx3FracIfIndex.2.26 = 6
-- dsx3FracIfIndex.2.13 = 5 dsx3FracIfIndex.2.27 = 6
-- dsx3FracIfIndex.2.14 = 5 dsx3FracIfIndex.2.28 = 6

-- For dsx3M23, dsx3SYNTRAN, dsx3CbitParity, and
-- dsx3ClearChannel there are 28 legal channels, numbered 1
-- through 28.

-- For e3Framed there are 16 legal channels,
-- numbered 1 through 16. The channels (1..16) correspond
-- directly to the equivalently numbered time-slots.

dsx3FracTable OBJECT-TYPE
SYNTAX SEQUENCE OF Dsx3FracEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"The DS3 Fractional table."
::= { ds3 13 }

dsx3FracEntry OBJECT-TYPE
SYNTAX Dsx3FracEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"An entry in the DS3 Fractional table."
INDEX { dsx3FracIndex, dsx3FracNumber }
::= { dsx3FracTable 1 }

Dsx3FracEntry ::=
SEQUENCE {
dsx3FracIndex
INTEGER,
dsx3FracNumber
INTEGER,

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RFC 1407 DS3/E3 MIB January 1993

dsx3FracIfIndex
INTEGER
}

dsx3FracIndex OBJECT-TYPE
SYNTAX INTEGER (1..'7fffffff'h)
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The index value which uniquely identifies the
DS3 interface to which this entry is applicable
The interface identified by a particular
value of this index is the same interface as
identified by the same value an dsx3LineIndex
object instance."
::= { dsx3FracEntry 1 }

dsx3FracNumber OBJECT-TYPE
SYNTAX INTEGER (1..31)
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The channel number for this entry."
::= { dsx3FracEntry 2 }

dsx3FracIfIndex OBJECT-TYPE
SYNTAX INTEGER (1..'7fffffff'h)
ACCESS read-write
STATUS mandatory
DESCRIPTION
"An index value that uniquely identifies an
interface. The interface identified by a particular
value of this index is the same interface
as identified by the same value an ifIndex
object instance. If no interface is currently using
a channel, the value should be zero. If a
single interface occupies more than one time
slot, that ifIndex value will be found in multiple
time slots."
::= { dsx3FracEntry 3 }

END

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RFC 1407 DS3/E3 MIB January 1993

5. Acknowledgments

This document was produced by the Trunk MIB Working Groups:

Tracy Cox Bellcore
Fred Baker Advanced Computer Communications
James Watt Newbridge
Bill Versteeg Versteeg Codeworks
Steve Buchko Newbridge
Greg Calmainis Newbridge
Kaj Tesink Bellcore
Al Bryenton Bell Northern Research
Tom Easterday CIC
John Labbe Merit Corporation
Chris Sullivan Gandalf Ltd
Grant Hall Gandalf Ltd
John Guerrero Digital Link
Rich Bradford BBN
Kurt Luoto Digital Link
Myron Hattig Kentrox
Ed Pring IBM
Larry Marks IBM
Kurt Hall Clear Communications Corp.
Jason Perreault Coral Network Corp.
Paul Farah T3plus
George Kajos Coral Network Corp.

6. 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", STD 16, 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", STD 15, RFC 1157, SNMP Research,
Performance Systems International, Performance Systems
International, MIT Laboratory for Computer Science, May 1990.

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RFC 1407 DS3/E3 MIB January 1993

[6] McCloghrie K., and M. Rose, Editors, "Management Information Base
for Network Management of TCP/IP-based internets", STD 17, 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] American National Standard for Telecommunications - Digital
Hierarchy - Electrical Interfaces, ANSI T1.102- 1987.

[10] American National Standard for Telecommunications - Digital
Hierarchy - Formats Specification, ANSI T1.107- 1988.

[10a] ANSI T1.107a-1990.

[11] American National Standard for Telecommunications - Carrier-to-
Customer Installation - DS3 Metallic Interface, ANSI T1.404-1989.

[12] American National Standard for Telecommunications -- Layer 1 In-
Service Digital Transmission Performance Monitoring T1M1/92-0xx,
T1M1.3/92-005R1, April 1992.

[13] Rose, M., and K. McCloghrie, Editors, "Concise MIB Definitions",
STD 16, RFC 1212, Performance Systems International, Hughes LAN
Systems, March 1991.

[14] CCITT - Digital Multiplex Equipment Operating at the Third Order
Bit Rate of 34 368 Kbit/s and the Forth Order Bit Rate of 139 264
Kbit/s and Using Positive Justification, G.751.

[15] European Telecommunications Standards Institute -- ETS "34M" --
Metropolitan Area Network Physical Convergence Layer Procedure
for 34.368 Megabits per Second, T/NA(91)18, May 1991.

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RFC 1407 DS3/E3 MIB January 1993

7. Security Considerations

Security issues are not discussed in this memo.

8. Authors' Addresses

Tracy A. Cox
Bell Communications Research
331 Newman Springs Road
P.O. Box 7020
Red Bank, NJ 07701-7020

Phone: (908) 758-2107
EMail: [email protected]

Kaj Tesink
Bell Communications Research
331 Newman Springs Road
P.O. Box 7020
Red Bank, NJ 07701-7020

Phone: (908) 758-5254
EMail: [email protected]

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