INTERNET-DRAFT DS1/E1/DS2/E2 MIB March 1996
Definitions of Managed Objects
for the DS1, E1, DS2 and E2 Interface Types
Sat Mar 16 12:38:30 EST 1996
draft-ietf-trunkmib-ds1-mib-03.txt
David Fowler (editor)
Newbridge Networks
davef@newbridge.com
Status of this Memo
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Abstract
This memo defines an experimental portion of the Management
Information Base (MIB) for use with network management protocols in
the Internet community. In particular, it describes objects used for
managing DS1, E1, DS2 and E2 interfaces. This document is a
companion document with Definitions of Managed Objects for the DS0,
DS3/E3 and SONET/SDH Interface Types, rfcTBD [19], rfcTBD [17] and
rfcTBD [18].
This memo specifies a MIB module in a manner that is both compliant
to the SNMPv2 SMI, and semantically identical to the peer SNMPv1
definitions.
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This memo does not specify a standard for the Internet community.
This document entirely replaces RFC 1406.
1. The SNMPv2 Network Management Framework
The SNMP Network Management Framework presently consists of three
major components. They are:
o the SMI, described in RFC 1902 [1] - the mechanisms used for
describing and naming objects for the purpose of management.
o the MIB-II, STD 17, RFC 1213 [2] - the core set of managed
objects for the Internet suite of protocols.
o the protocol, RFC 1157 [3] and/or RFC 1905 [4], - the protocol
for accessing managed objects.
The Framework permits new objects to be defined for the purpose of
experimentation and evaluation.
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2. Object Definitions
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)
defined in the SMI. In particular, each object type is named by an
OBJECT IDENTIFIER, an administratively assigned name. The object
type together with an object instance serves to uniquely identify a
specific instantiation of the object. For human convenience, we
often use a textual string, termed the descriptor, to also refer to
the object type.
2.1. Changes from RFC1406
The changes from RFC1406 are the following:
(1) The Fractional Table has been deprecated
(2) This document uses SNMPv2 SMI
(3) Usage is given for ifTable and ifXTable
(4) Example usage of ifStackTable is included
(5) dsx1IfIndex has been deprecated
(6) Support for DS2 and E2 have been added
(7) An additional lineType for unframed E1 was added
(8) The definition of valid intervals has been clarified
for the case where the agent proxied for other
devices. In particular, the treatment of missing
intervals has been clarified.
(9) An inward loopback has been added.
(10) Additional lineStatus bits have been added for Near End
in Unavailable Signal State, Carrier Equipment Out of
Service, DS2 Payload AIS, and DS2 Performance Threshold
(11) A line Length object has been added.
(12) Signal mode of other has been added.
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(13) Added a lineStatus last change, trap and enabler.
(14) dsx1CircuitIdentifier has been deprecated since the
object ifPhysAddress is available for all levels
through interface stacking.
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3. Overview
These objects are used when the particular media being used to
realize an interface is a DS1/E1/DS2/E2 interface. At present, this
applies to these values of the ifType variable in the Internet-
standard MIB:
ds1 (18)
The definitions contained herein are based on the AT&T T-1 Superframe
(a.k.a., D4) and Extended Superframe (ESF) formats [6, 7], the latter
of which conforms to ANSI specifications [8], and the CCITT
Recommendations [9, 10], referred to as E1 for the rest of this memo.
The various DS1 and E1 line disciplines are similar enough that
separate MIBs are unwarranted, although there are some differences.
For example, Loss of Frame is defined more rigorously in the ESF
specification than in the D4 specification, but it is defined in
both.
Where it is necessary to distinguish between the flavors of E1 with
and without CRC, E1-CRC to denotes the "with CRC" form (G.704 Table
4b) and E1-noCRC denotes the "without CRC" form (G.704 Table 4a).
3.1. Use of ifTable for DS1 Layer
Only the ifGeneralGroup needs to be supported.
ifTable Object Use for DS1 Layer
======================================================================
ifIndex Interface index.
ifDescr See interfaces MIB [21]
ifType ds1(18)
ifSpeed Speed of line rate
DS1 - 1544000
E1 - 2048000
DS2 - 6312000
E2 - 8448000
ifPhysAddress The value of the Circuit Identifier.
If no Circuit Identifier has been assigned
this object should have an octet string
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with zero length.
ifAdminStatus See interfaces MIB [21]
ifOperStatus See interfaces MIB [21]
ifLastChange See interfaces MIB [21]
ifName See interfaces MIB [21].
ifLinkUpDownTrapEnable Set to enabled(1).
ifHighSpeed Speed of line in Mega-bits per second
(2, 6, or 8)
ifConnectorPresent Set to true(1) normally, except for
cases such as DS1/E1 over AAL1/ATM where
false(2) is appropriate
3.2. Using ifStackTable
The objects dsx1IfIndex has been deprecated. This object previously
allowed a very special proxy situation to exist for Routers and CSUs.
This section now describes how to use ifStackTable to represent this
relationship.
The paragraphs discussing dsx1IfIndex and dsx1LineIndex have been
preserved in Appendix A for informational purposes.
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External&Internal interface scenario: the SNMP Agents resides on an
host external from the device supporting DS1 interfaces (e.g., a
router). The Agent represents both the host and the DS1 device.
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:
+-----+
| | |
| | | +---------------------+
|E | | 1.544 MBPS | Line#A | DS1 Link
|t | R |---------------+ - - - - - - - - - +------>
|h | | | |
|e | O | 1.544 MBPS | Line#B | DS1 Link
|r | |---------------+ - - - - - - - - - - +------>
|n | U | | CSU Shelf |
|e | | 1.544 MBPS | Line#C | DS1 Link
|t | T |---------------+ - - - -- -- - - - - +------>
| | | | |
|-----| E | 1.544 MBPS | Line#D | DS1 Link
| | |---------------+ - - - - -- - - - - +------>
| | R | |_____________________|
| | |
| +-----+
The assignment of the index values could for example be:
ifIndex Description
1 Ethernet
2 Line#A Router
3 Line#B Router
4 Line#C Router
5 Line#D Router
6 Line#A CSU Router
7 Line#B CSU Router
8 Line#C CSU Router
9 Line#D CSU Router
10 Line#A CSU Network
11 Line#B CSU Network
12 Line#C CSU Network
13 Line#D CSU Network
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The ifStackTable is then used to show the relationships between the
various DS1 interfaces.
ifStackTable Entries
HigherLayer LowerLayer
2 6
3 7
4 8
5 9
6 10
7 11
8 12
9 13
If the CSU shelf is managed by itself by a local SNMP Agent, the
situation would be identical, except the Ethernet and the 4 router
interfaces are deleted. Interfaces would also be numbered from 1 to
8.
ifIndex Description
1 Line#A CSU Router
2 Line#B CSU Router
3 Line#C CSU Router
4 Line#D CSU Router
5 Line#A CSU Network
6 Line#B CSU Network
7 Line#C CSU Network
8 Line#D CSU Network
ifStackTable Entries
HigherLayer LowerLayer
1 5
2 6
3 7
4 8
3.3. Objectives of this MIB Module
There are numerous things that could be included in a MIB for DS1
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 DS1 interfaces. As such, a design decision was made
up front to very closely align the MIB with the set of objects that
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can generally be read from DS1 devices that are currently deployed.
3.4. DS1 Terminology
The terminology used in this document to describe error conditions on
a DS1 interface as monitored by a DS1 device are based on the late
but not final draft of what became the ANSI T1.231 standard [11]. If
the definition in this document does not match the definition in the
ANSI T1.231 document, the implementer should follow the definition
described in this document.
3.4.1. Error Events
Bipolar Violation (BPV) Error Event
A BPV error event for an AMI-coded signal is the occurrence of
a pulse of the same polarity as the previous pulse. (See
T1.231 Section 6.1.1.1.1) A BPV error event for a B8ZS- or
HDB3- coded signal is the occurrence of a pulse of the same
polarity as the previous pulse without being a part of the
zero substitution code.
Excessive Zeroes (EXZ) Error Event
An Excessive Zeroes error event for an AMI-coded signal is the
occurrence of more than fifteen contiguous zeroes. (See
T1.231 Section 6.1.1.1.2) For a B8ZS coded signal, the defect
occurs when more than seven contiguous zeroes are detected.
Line Coding Violation (LCV) Error Event
A Line Coding Violation (LCV) is the occurrence of either a
Bipolar Violation (BPV) or Excessive Zeroes (EXZ) Error Event.
(Also known as CV-L; See T1.231 Section 6.5.1.1)
Path Coding Violation (PCV) Error Event
A Path Coding Violation error event is a frame synchronization
bit error in the D4 and E1-noCRC formats, or a CRC or frame
synch. bit error in the ESF and E1-CRC formats. (Also known as
CV-P; See T1.231 Section 6.5.2.1)
Controlled Slip (CS) Error Event
A Controlled Slip is the replication or deletion of the
payload bits of a DS1 frame. (See T1.231 Section 6.1.1.2.3) A
Controlled Slip may be performed when there is a difference
between the timing of a synchronous receiving terminal and the
received signal. A Controlled Slip does not cause an Out of
Frame defect.
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3.4.2. Performance Defects
Out Of Frame (OOF) Defect
An OOF defect is the occurrence of a particular density of
Framing Error events. (See T1.231 Section 6.1.2.2.1)
For DS1 links, an Out of Frame defect is declared when the
receiver detects two or more framing errors within a 3 msec
period for ESF signals and 0.75 msec for D4 signals, or two or
more errors out of five or fewer consecutive framing-bits.
For E1 links, an Out Of Frame defect is declared when three
consecutive frame alignment signals have been received with an
error (see G.706 Section 4.1 [15]).
For DS2 links, an Out of Frame defect is declared when 7 or
more consecutive errored framing patterns (4 multiframe) are
received. The LOF is cleared when 3 or more consecutive
correct framing patterns are received.
Once an Out Of Frame Defect is declared, the framer starts
searching for a correct framing pattern. The Out of Frame
defect ends when the signal is in frame.
In-frame occurs when there are fewer than two frame bit errors
within 3 msec period for ESF signals and 0.75 msec for D4
signals.
For E1 links, in-frame occurs when a) in frame N the frame
alignment signal is correct and b) in frame N+1 the frame
alignment signal is absent (i.e., bit 2 in TS0 is a one) and
c) in frame N+2 the frame alignment signal is present and
correct. (See G.704 Section 4.1)
Alarm Indication Signal (AIS) Defect
For D4 and ESF links, the 'all ones' condition is detected at
a DS1 line interface upon observing an unframed signal with a
one's density of at least 99.9% present for a time equal to or
greater than T, where 3 ms <= T <= 75 ms. The AIS is
terminated upon observing a signal not meeting the one's
density or the unframed signal criteria for a period equal to
or greater than than T. (See G.775, Section 5.4)
For E1 links, the 'all-ones' condition is detected at the line
interface as a string of 512 bits containing fewer than three
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zero bits (see O.162 [12] Section 3.3.2).
For DS2 links, the DS2 AIS shall be sent from the NT1 to the
user to indicate a loss of the 6,312 kbps frame capability on
the network side. The DS2 AIS is defined as a bit array of
6,312 kbps in which all binary bits are set to '1'.
The DS2 AIS detection and removal shall be implemented
according to ITU-T Draft Recommendation G.775[20] Section 5.5:
- a DS2 AIS defect is detected when the incoming signal has
two (2) or less ZEROs in a sequence of 3156 bits (0.5 ms).
- a DS2 AIS defect is cleared when the incoming signal has
three (3) or more ZEROs ina sequence of 3156 bits (0.5 ms).
3.4.3. 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.
Performance parameters are of type Gauge32 because it is possible for
these objects to decrease. Objects may decrease when Unavailable
Seconds occurs across a fifteen minutes interval boundary. See
Unavailable Seconds discussion later in this section.
Line Errored Seconds (LES)
A Line Errored Second is a second in which one or more Line
Code Violation error events were detected. (Also known as ES-
L; See T1.231 Section 6.5.1.2)
Controlled Slip Seconds (CSS)
A Controlled Slip Second is a one-second interval containing
one or more controlled slips. (See T1.231 Section 6.5.2.8)
This is not incremented during an Unavailable Second.
Errored Seconds (ES)
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For ESF and E1-CRC links an Errored Second is a second with
one or more Path Code Violation OR one or more Out of Frame
defects OR one or more Controlled Slip events OR a detected
AIS defect. (See T1.231 Section 6.5.2.2 and G.826[22] Section
B.1)
For D4 and E1-noCRC links, the presence of Bipolar Violations
also triggers an Errored Second.
This is not incremented during an Unavailable Second.
Bursty Errored Seconds (BES)
A Bursty Errored Second (also known as Errored Second type B
in T1.231 Section 6.5.2.4) is a second with fewer than 320 and
more than 1 Path Coding Violation error events, no Severely
Errored Frame defects and no detected incoming AIS defects.
Controlled slips are not included in this parameter.
This is not incremented during an Unavailable Second. It
applies to ESF signals only.
Severely Errored Seconds (SES)
A Severely Errored Second for ESF signals is a second with 320
or more Path Code Violation Error Events OR one or more Out of
Frame defects OR a detected AIS defect. (See T1.231 Section
6.5.2.5)
For E1-CRC signals, a Severely Errored Second is a second with
832 or more Path Code Violation error events OR one or more
Out of Frame defects.
For E1-noCRC signals, a Severely Errored Second is a 2048 LCVs
or more.
For D4 signals, a Severely Errored Second is a count of one-
second intervals with Framing Error events, or an OOF defect,
or 1544 LCVs or more.
Controlled slips are not included in this parameter.
This is not incremented during an Unavailable Second.
Severely Errored Framing Second (SEFS)
An Severely Errored Framing Second is a second with one or
more Out of Frame defects OR a detected AIS defect. (Also
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known as SAS-P (SEF/AIS second); See T1.231 Section 6.5.2.6)
Degraded Minutes
A Degraded Minute is one in which the estimated error rate
exceeds 1E-6 but does not exceed 1E-3 (see G.821[13]).
Degraded Minutes are determined by collecting all of the
Available Seconds, removing any Severely Errored Seconds
grouping the result in 60-second long groups and counting a
60-second long group (a.k.a., minute) as degraded if the
cumulative errors during the seconds present in the group
exceed 1E-6. Available seconds are merely those seconds which
are not Unavailable as described below.
Unavailable Seconds (UAS)
Unavailable Seconds (UAS) are calculated by counting the
number of seconds that the interface is unavailable. The DS1
interface is said to be unavailable from the onset of 10
contiguous SESs, 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
SESs, then the DS1 interface unavailability starts from the
onset of these SESs. Once unavailable, and if no failure is
present, the DS1 interface becomes available at the onset of
10 contiguous seconds with no SESs. Once unavailable, and if
a failure is present, the DS1 interface becomes available at
the onset of 10 contiguous seconds with no SESs, if the
failure clearing time is less than or equal to 10 seconds. If
the failure clearing time is more than 10 seconds, the DS1
interface becomes available at the onset of 10 contiguous
seconds with no SESs, or the onset period leading to the
successful clearing condition, whichever occurs later. With
respect to the DS1 error counts, all counters are incremented
while the DS1 interface is deemed available. While the
interface is deemed unavailable, the only count that is
incremented is UASs.
Note that this definition implies that the agent cannot
determine until after a ten second interval has passed whether
a given one-second interval belongs to available or
unavailable time. If the agent chooses to update the various
performance statistics in real time then it must be prepared
to retroactively reduce the ES, BES, SES, and SEFS counts by
10 and increase the UAS count by 10 when it determines that
available time has been entered. It must also be prepared to
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adjust the PCV count and the DM count as necessary since these
parameters are not accumulated during unavailable time. It
must be similarly prepared to retroactively decrease the UAS
count by 10 and increase the ES, BES, and DM counts as
necessary upon entering available time. A special case exists
when the 10 second period leading to available or unavailable
time crosses a 900 second statistics window boundary, as the
foregoing description implies that the ES, BES, SES, SEFS, DM,
and UAS counts the PREVIOUS interval must be adjusted. In
this case successive GETs of the affected dsx1IntervalSESs and
dsx1IntervalUASs objects will return differing values if the
first GET occurs during the first few seconds of the window.
The agent may instead choose to delay updates to the various
statistics by 10 seconds in order to avoid retroactive
adjustments to the counters. A way to do this is sketched in
Appendix B.
In any case, a linkDown trap shall be sent only after the
agent has determined for certain that the unavailable state
has been entered, but the time on the trap will be that of the
first UAS (i.e., 10 seconds earlier). A linkUp trap shall be
handled similarly.
According to ANSI T1.231 unavailable time begins at the
_onset_ of 10 contiguous severely errored seconds -- that is,
unavailable time starts with the _first_ of the 10 contiguous
SESs. Also, while an interface is deemed unavailable all
counters for that interface are frozen except for the UAS
count. It follows that an implementation which strictly
complies with this standard must _not_ increment any counters
other than the UAS count -- even temporarily -- as a result of
anything that happens during those 10 seconds. Since changes
in the signal state lag the data to which they apply by 10
seconds, an ANSI-compliant implementation must pass the the
one-second statistics through a 10-second delay line prior to
updating any counters. That can be done by performing the
following steps at the end of each one second interval.
i) Read near/far end CV counter and alarm status flags from the
hardware.
ii) Accumulate the CV counts for the preceding second and
compare them to the ES and SES threshold for the layer
in question. Update the signal state and shift the
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one-second CV counts and ES/SES flags into the 10-element
delay line. Note that far-end one-second statistics are
to be flagged as "absent" during any second in which there
is an incoming defect at the layer in question or at any
lower layer.
iii) Update the current interval statistics using the signal
state from the _previous_ update cycle and the one-second
CV counts and ES/SES flags shifted out of the 10-element
delay line.
This approach is further described in Appendix B.
3.4.4. Failure States
The following failure states are received, or detected failures, that
are reported in the dsx1LineStatus object. When a DS1 interface would,
if ever, produce the conditions leading to the failure state is
described in the appropriate specification.
Far End Alarm Failure
The Far End Alarm failure is also known as "Yellow Alarm" in
the DS1 case, "Distant Alarm" in the E1 case, and "Remote
Alarm" in the DS2 case.
For D4 links, the Far End Alarm failure is declared when bit 6
of all channels has been zero for at least 335 ms and is
cleared when bit 6 of at least one channel is non-zero for a
period T, where T is usually less than one second and always
less than 5 seconds. The Far End Alarm failure is not
declared for D4 links when a Loss of Signal is detected.
For ESF links, the Far End Alarm failure is declared if the
Yellow Alarm signal pattern occurs in at least seven out of
ten contiguous 16-bit pattern intervals and is cleared if the
Yellow Alarm signal pattern does not occur in ten contiguous
16-bit signal pattern intervals.
For E1 links, the Far End Alarm failure is declared when bit 3
of time-slot zero is received set to one on two consecutive
occasions. The Far End Alarm failure is cleared when bit 3 of
time-slot zero is received set to zero.
For DS2 links, if a loss of frame alignment (LOF or LOS)
and/or DS2 AIS condition, is detected, the RAI signal shall be
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generated and transmitted to the remote side.
The Remote Alarm Indication(RAI) signal is defined on m-bits
as a repetition of the 16bit sequence consisting of eight
binary '1s' and eight binary '0s' in m-bits(1111111100000000).
When the RAI signal is not sent (in normal operation),the HDLC
flag pattern (01111110) in the m-bit is sent.
The RAI failure is detected when 16 or more consecutive RAI-
patterns (1111111100000000) are received. The RAI failure is
cleared when 4 or more consecutive incorrect-RAI-patterns are
received.
Alarm Indication Signal (AIS) Failure
The Alarm Indication Signal failure is declared when an AIS
defect is detected at the input and the AIS defect still
exists after the Loss Of Frame failure (which is caused by the
unframed nature of the 'all-ones' signal) is declared. The AIS
failure is cleared when the Loss Of Frame failure is cleared.
(See T1.231 Section 6.2.1.2.1)
An AIS defect at a 6312 kbit/s (G.704) interface is detected
when the incoming signal has two {2} or less ZEROs in a
sequence of 3156 bits (0.5ms).
The AIS signal defect is cleared when the incoming signal has
three {3} or more ZEROs in a sequence of 3156 bits (0.5ms).
Loss Of Frame Failure
For DS1 links, the Loss Of Frame failure is declared when an
OOF or LOS defect has persisted for T seconds, where 2 <= T
<= 10. The Loss Of Frame failure is cleared when there have
been no OOF or LOS defects during a period T where 0 <= T <=
20. Many systems will perform "hit integration" within the
period T before declaring or clearing the failure e.g., see TR
62411 [14].
For E1 links, the Loss Of Frame Failure is declared when an
OOF defect is detected.
Loss Of Signal Failure
For DS1, the Loss Of Signal failure is declared upon observing
175 +/- 75 contiguous pulse positions with no pulses of either
positive or negative polarity. The LOS failure is cleared
upon observing an average pulse density of at least 12.5% over
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a period of 175 +/- 75 contiguous pulse positions starting
with the receipt of a pulse.
For E1 links, the Loss Of Signal failure is declared when
greater than 10 consecutive zeroes are detected (see O.162
Section 3.4`<.4).
A LOS defect at 6312kbit/s interfaces is detected when the
incoming signal has "no transitions", i.e. when the signal
level is less than or equal to a signal level of 35dB below
nominal, for N consecutive pulse intervals, where 10 <=N<=255.
The LOS defect is cleared when the incoming signal has
"transitions", i.e. when the signal level is greater than or
equal to a signal level of 9dB below nominal, for N
consecutive pulse intervals, where 10<=N<=255.
A signal with "transitions" corresponds to a G.703 compliant
signal.
Loopback Pseudo-Failure
The Loopback Pseudo-Failure is declared when the near end
equipment has placed a loopback (of any kind) on the DS1.
This allows a management entity to determine from one object
whether the DS1 can be considered to be in service or not
(from the point of view of the near end equipment).
TS16 Alarm Indication Signal Failure
For E1 links, the TS16 Alarm Indication Signal failure is
declared when time-slot 16 is received as all ones for all
frames of two consecutive multiframes (see G.732 Section
4.2.6). This condition is never declared for DS1.
Loss Of MultiFrame Failure
The Loss Of MultiFrame failure is declared when two
consecutive multiframe alignment signals (bits 4 through 7 of
TS16 of frame 0) have been received with an error. The Loss
Of Multiframe failure is cleared when the first correct
multiframe alignment signal is received. The Loss Of
Multiframe failure can only be declared for E1 links operating
with G.732 [16] framing (sometimes called "Channel Associated
Signalling" mode).
Far End Loss Of Multiframe Failure
The Far End Loss Of Multiframe failure is declared when bit 2
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of TS16 of frame 0 is received set to one on two consecutive
occasions. The Far End Loss Of Multiframe failure is cleared
when bit 2 of TS16 of frame 0 is received set to zero. The
Far End Loss Of Multiframe failure can only be declared for E1
links operating in "Channel Associated Signalling" mode. (See
G.732)
DS2 Payload AIS Failure
The DS2 Payload AIS is detected when the incoming signal of
the 6,312 kbps frame payload [TS1-TS96] has 2 or less 0's in a
sequence of 3072 bits (0.5ms). The DS2 Payload AIS is cleared
when the incoming signal of the 6,312 kbps frame payload
[TS1-TS96] has 3 or more 0's in a sequence of 3072 bits (0.5
ms).
DS2 Performance Threshold
DS2 Performance Threshold Failure monitors equipment
performance and is based on the CRC (Cyclic Redundancy Check)
Procedure defined in G.704.
The DS2 Performance Threshold Failure is detected when the bit
error ratio exceeds 10^-4 (Performance Threshold), and the DS2
Performance Threshold Failure shall be cleared when the bit
error ratio decreased to less than 10^-6."
3.4.5. 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
DS1-MIB DEFINITIONS ::= BEGIN
IMPORTS
MODULE-IDENTITY, OBJECT-TYPE, Gauge32,
NOTIFICATION-TYPE FROM SNMPv2-SMI
DisplayString, TimeStamp, TruthValue FROM SNMPv2-TC
MODULE-COMPLIANCE, OBJECT-GROUP FROM SNMPv2-CONF
InterfaceIndex FROM IF-MIB
transmission FROM RFC1213-MIB;
ds1 MODULE-IDENTITY
LAST-UPDATED "9602032200Z"
ORGANIZATION "IETF Trunk MIB Working Group"
CONTACT-INFO
" David Fowler
Postal: Newbridge Networks Corporation
600 March Road
Kanata, Ontario, Canada K2K 2E6
Tel: +1 613 591 3600
Fax: +1 613 591 3680
E-mail: davef@newbridge.com"
DESCRIPTION
"The MIB module to describe DS1, E1, DS2, and
E2 interfaces objects."
::= { transmission 18 }
-- note that this subsumes cept (19);
-- there is no separate CEPT MIB
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-- The DS1 Near End Group
-- The DS1 Near End Group consists of four tables:
-- DS1 Configuration
-- DS1 Current
-- DS1 Interval
-- DS1 Total
-- The DS1 Configuration Table
dsx1ConfigTable OBJECT-TYPE
SYNTAX SEQUENCE OF Dsx1ConfigEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The DS1 Configuration table."
::= { ds1 6 }
dsx1ConfigEntry OBJECT-TYPE
SYNTAX Dsx1ConfigEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry in the DS1 Configuration table."
INDEX { dsx1LineIndex }
::= { dsx1ConfigTable 1 }
Dsx1ConfigEntry ::=
SEQUENCE {
dsx1LineIndex InterfaceIndex,
dsx1IfIndex InterfaceIndex,
dsx1TimeElapsed INTEGER,
dsx1ValidIntervals INTEGER,
dsx1LineType INTEGER,
dsx1LineCoding INTEGER,
dsx1SendCode INTEGER,
dsx1CircuitIdentifier DisplayString,
dsx1LoopbackConfig INTEGER,
dsx1LineStatus INTEGER,
dsx1SignalMode INTEGER,
dsx1TransmitClockSource INTEGER,
dsx1Fdl INTEGER,
dsx1InvalidIntervals INTEGER,
dsx1LineLength INTEGER,
dsx1LineStatusLastChange TimeStamp,
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dsx1LineStatusChangeTrapEnable INTEGER
}
dsx1LineIndex OBJECT-TYPE
SYNTAX InterfaceIndex
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object should be made equal to ifIndex. The
next paragraph describes its previous usage.
Making the object equal to ifIndex allows proper
use of ifStackTable and ds0/ds0bundle mibs.
Previously, this object is the identifier of a DS1
Interface on a managed device. If there is an
ifEntry that is directly associated with this and
only this DS1 interface, it should have the same
value as ifIndex. Otherwise, number the
dsx1LineIndices 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."
::= { dsx1ConfigEntry 1 }
dsx1IfIndex OBJECT-TYPE
SYNTAX InterfaceIndex
MAX-ACCESS read-only
STATUS deprecated
DESCRIPTION
"This value for this object is equal to the value
of ifIndex from the Interfaces table of MIB II
(RFC 1213)."
::= { dsx1ConfigEntry 2 }
dsx1TimeElapsed OBJECT-TYPE
SYNTAX INTEGER (0..899)
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of seconds that have elapsed since the
beginning of the near end current error-
measurement period."
::= { dsx1ConfigEntry 3 }
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dsx1ValidIntervals OBJECT-TYPE
SYNTAX INTEGER (0..96)
MAX-ACCESS read-only
STATUS current
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. In
the case where the agent is a proxy, it is
possible that some intervals are unavailable. In
this case, this interval is the maximum interval
number for which valid data is available."
::= { dsx1ConfigEntry 4 }
dsx1LineType OBJECT-TYPE
SYNTAX INTEGER {
other(1),
dsx1ESF(2),
dsx1D4(3),
dsx1E1(4),
dsx1E1CRC(5),
dsx1E1MF(6),
dsx1E1CRCMF(7),
dsx1Unframed(8),
dsx1E1Unframed(9)
}
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"This variable indicates the variety of DS1
Line implementing this circuit. The type of
circuit affects the number of bits per second
that the circuit can reasonably carry, as well
as the interpretation of the usage and error
statistics. The values, in sequence, describe:
TITLE: SPECIFICATION:
dsx1ESF Extended SuperFrame DS1
dsx1D4 AT&T D4 format DS1
dsx1E1 CCITT Recommendation G.704
(Table 4a)
dsx1E1-CRC CCITT Recommendation G.704
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(Table 4b)
dsxE1-MF G.704 (Table 4a) with TS16
multiframing enabled
dsx1E1-CRC-MF G.704 (Table 4b) with TS16
multiframing enabled
dsx1Unframed No Framing performed
dsx1E1Unframed E1 with No Framing
dsx1E1Unframed - E1, no framing = 32 x 64k = 2048k
dsx1E1 or dsx1E1CRC - E1, with framing,
no signalling = 31 x 64k = 1984k
dsx1E1MF or dsx1E1CRCMF - E1, with framing,
signalling = 30 x 64k = 1920k
For further information See CCITT Recomm G.704"
::= { dsx1ConfigEntry 5 }
dsx1LineCoding OBJECT-TYPE
SYNTAX INTEGER {
dsx1JBZS (1),
dsx1B8ZS (2),
dsx1HDB3 (3),
dsx1ZBTSI (4),
dsx1AMI (5),
other(6)
}
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"This variable describes the variety of Zero Code
Suppression used on this interface, which in turn
affects a number of its characteristics.
dsx1JBZS refers the Jammed Bit Zero Suppression,
in which the AT&T specification of at least one
pulse every 8 bit periods is literally implemented
by forcing a pulse in bit 8 of each channel.
Thus, only seven bits per channel, or 1.344 Mbps,
is available for data.
dsx1B8ZS refers to the use of a specified pattern
of normal bits and bipolar violations which
are used to replace a sequence of eight zero
bits.
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ANSI Clear Channels may use dsx1ZBTSI, or Zero
Byte Time Slot Interchange.
E1 links, with or without CRC, use dsx1HDB3 or
dsx1AMI.
dsx1AMI refers to a mode wherein no zero code
suppression is present and the line encoding
does not solve the problem directly. In this
application, the higher layer must provide data
which meets or exceeds the pulse density
requirements, such as inverting HDLC data."
::= { dsx1ConfigEntry 6 }
dsx1SendCode OBJECT-TYPE
SYNTAX INTEGER {
dsx1SendNoCode(1),
dsx1SendLineCode(2),
dsx1SendPayloadCode(3),
dsx1SendResetCode(4),
dsx1SendQRS(5),
dsx1Send511Pattern(6),
dsx1Send3in24Pattern(7),
dsx1SendOtherTestPattern(8)
}
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"This variable indicates what type of code is
being sent across the DS1 interface by the device.
Setting this variable causes the interface to send
the code requested. The values mean:
dsx1SendNoCode
sending looped or normal data
dsx1SendLineCode
sending a request for a line loopback
dsx1SendPayloadCode
sending a request for a payload loopback
dsx1SendResetCode
sending a loopback termination request
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dsx1SendQRS
sending a Quasi-Random Signal (QRS) test
pattern
dsx1Send511Pattern
sending a 511 bit fixed test pattern
dsx1Send3in24Pattern
sending a fixed test pattern of 3 bits set
in 24
dsx1SendOtherTestPattern
sending a test pattern other than those
described by this object"
::= { dsx1ConfigEntry 7 }
dsx1CircuitIdentifier OBJECT-TYPE
SYNTAX DisplayString (SIZE (0..255))
MAX-ACCESS read-write
STATUS deprecated
DESCRIPTION
"This variable contains the transmission vendor's
circuit identifier, for the purpose of
facilitating troubleshooting. In the presence of
interface layering, ifPhysAddress is now
sufficient for all previous usages of
dsx1CircuitIndentifier."
::= { dsx1ConfigEntry 8 }
dsx1LoopbackConfig OBJECT-TYPE
SYNTAX INTEGER {
dsx1NoLoop(1),
dsx1PayloadLoop(2),
dsx1LineLoop(3),
dsx1OtherLoop(4),
dsxInwardLoop(5)
}
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"This variable represents the loopback configuration
of the DS1 interface. Agents supporting read/write
access should return badValue in response to a
requested loopback state that the interface does not
support. The values mean:
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dsx1NoLoop
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.
dsx1PayloadLoop
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.
dsx1LineLoop
The received signal at this interface does not
go through the device (minimum penetration) but
is looped back out.
dsx1OtherLoop
Loopbacks that are not defined here.
dsx1InwardLoop
The transmitted signal at this interface is looped
back and received by the same interface. What is
transmitted onto the line is product dependent."
::= { dsx1ConfigEntry 9 }
dsx1LineStatus OBJECT-TYPE
SYNTAX INTEGER (1..131071)
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This variable indicates the Line Status of the
interface. It contains loopback, failure,
received 'alarm' and transmitted 'alarms
information.
The dsx1LineStatus is a bit map represented as a
sum, therefore, it can represent multiple failures
(alarms) and a LoopbackState simultaneously.
dsx1NoAlarm must be set if and only if no other
flag is set.
If the dsx1loopbackState bit is set, the loopback
in effect can be determined from the
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dsx1loopbackConfig object.
The various bit positions are:
1 dsx1NoAlarm No alarm present
2 dsx1RcvFarEndLOF Far end LOF (a.k.a., Yellow Alarm)
4 dsx1XmtFarEndLOF Near end sending LOF Indication
8 dsx1RcvAIS Far end sending AIS
16 dsx1XmtAIS Near end sending AIS
32 dsx1LossOfFrame Near end LOF (a.k.a., Red Alarm)
64 dsx1LossOfSignal Near end Loss Of Signal
128 dsx1LoopbackState Near end is looped
256 dsx1T16AIS E1 TS16 AIS
512 dsx1RcvFarEndLOMF Far End Sending TS16 LOMF
1024 dsx1XmtFarEndLOMF Near End Sending TS16 LOMF
2048 dsx1RcvTestCode Near End detects a test code
4096 dsx1OtherFailure any line status not defined here
8192 dsx1UnavailSigState Near End in Unavailable Signal
State
16384 dsx1NetEquipOOS Carrier Equipment Out of Service
32768 dsx1RcvPayloadAIS DS2 Payload AIS
65536 dsx1Ds2PerfThreshold DS2 Performance Threshold
Exceeded"
::= { dsx1ConfigEntry 10 }
dsx1SignalMode OBJECT-TYPE
SYNTAX INTEGER {
none (1),
robbedBit (2),
bitOriented (3),
messageOriented (4),
other (5)
}
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"'none' indicates that no bits are reserved for
signaling on this channel.
'robbedBit' indicates that DS1 Robbed Bit Sig-
naling is in use.
'bitOriented' indicates that E1 Channel Asso-
ciated Signaling is in use.
'messageOriented' indicates that Common Chan-
nel Signaling is in use either on channel 16 of
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an E1 link or channel 24 of a DS1."
::= { dsx1ConfigEntry 11 }
dsx1TransmitClockSource OBJECT-TYPE
SYNTAX INTEGER {
loopTiming(1),
localTiming(2),
throughTiming(3)
}
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"The source of Transmit Clock.
'loopTiming' indicates that the recovered re-
ceive clock is used as the transmit clock.
'localTiming' indicates that a local clock
source is used.
'throughTiming' indicates that recovered re-
ceive clock from another interface is used as
the transmit clock."
::= { dsx1ConfigEntry 12 }
dsx1Fdl OBJECT-TYPE
SYNTAX INTEGER (1..15)
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"This bitmap describes the use of the facili-
ties data link, and is the sum of the capabili-
ties. Set any bits that are appropriate:
other(1),
dsx1AnsiT1403(2),
dsx1Att54016(4),
dsx1FdlNone(8)
'other' indicates that a protocol other than
one following is used.
'dsx1AnsiT1403' refers to the FDL exchange
recommended by ANSI.
'dsx1Att54016' refers to ESF FDL exchanges.
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'dsx1FdlNone' indicates that the device does
not use the FDL."
::= { dsx1ConfigEntry 13 }
dsx1InvalidIntervals OBJECT-TYPE
SYNTAX INTEGER (0..96)
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of intervals for which no valid data
is available."
::= { dsx1ConfigEntry 14 }
dsx1LineLength OBJECT-TYPE
SYNTAX INTEGER (0..64000)
UNITS "meters"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The length of the ds1 line in meters. This
objects provides information for line build out
circuitry if it exists and can profitably use the
information."
::= { dsx1ConfigEntry 15 }
dsx1LineStatusLastChange OBJECT-TYPE
SYNTAX TimeStamp
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of MIB II's sysUpTime object at the
time this DS1 entered its current line status
state. If the current state was entered prior to
the last re-initialization of the proxy-agent,
then this object contains a zero value."
::= { dsx1ConfigEntry 16 }
dsx1LineStatusChangeTrapEnable OBJECT-TYPE
SYNTAX INTEGER {
enabled(1),
disabled(2)
}
MAX-ACCESS read-write
STATUS current
DESCRIPTION
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"Indicates whether dsx1LineStatusChange traps
should be generated for this interface."
DEFVAL { disabled }
::= { dsx1ConfigEntry 17 }
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-- The DS1 Current Table
dsx1CurrentTable OBJECT-TYPE
SYNTAX SEQUENCE OF Dsx1CurrentEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The DS1 current table contains various statistics
being collected for the current 15 minute
interval."
::= { ds1 7 }
dsx1CurrentEntry OBJECT-TYPE
SYNTAX Dsx1CurrentEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry in the DS1 Current table."
INDEX { dsx1CurrentIndex }
::= { dsx1CurrentTable 1 }
Dsx1CurrentEntry ::=
SEQUENCE {
dsx1CurrentIndex InterfaceIndex,
dsx1CurrentESs Gauge32,
dsx1CurrentSESs Gauge32,
dsx1CurrentSEFSs Gauge32,
dsx1CurrentUASs Gauge32,
dsx1CurrentCSSs Gauge32,
dsx1CurrentPCVs Gauge32,
dsx1CurrentLESs Gauge32,
dsx1CurrentBESs Gauge32,
dsx1CurrentDMs Gauge32,
dsx1CurrentLCVs Gauge32
}
dsx1CurrentIndex OBJECT-TYPE
SYNTAX InterfaceIndex
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The index value which uniquely identifies the
DS1 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 as a dsx1LineIndex
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object instance."
::= { dsx1CurrentEntry 1 }
dsx1CurrentESs OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of Errored Seconds, encountered by a
DS1 interface in the current 15 minute interval.
noSuchInstance will be returned if no data is
available."
::= { dsx1CurrentEntry 2 }
dsx1CurrentSESs OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of Severely Errored Seconds
encountered by a DS1 interface in the current
15 minute interval. noSuchInstance will be
returned if no data is available."
::= { dsx1CurrentEntry 3 }
dsx1CurrentSEFSs OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of Severely Errored Framing Seconds
encountered by a DS1 interface in the current 15
minute interval. noSuchInstance will be returned
if no data is available."
::= { dsx1CurrentEntry 4 }
dsx1CurrentUASs OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of Unavailable Seconds encountered by
a DS1 interface in the current 15 minute interval.
noSuchInstance will be returned if no data is
available."
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::= { dsx1CurrentEntry 5 }
dsx1CurrentCSSs OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of Controlled Slip Seconds
encountered by a DS1 interface in the current
15 minute interval. noSuchInstance will be
returned if no data is available."
::= { dsx1CurrentEntry 6 }
dsx1CurrentPCVs OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of Path Coding Violations
encountered by a DS1 interface in the current
15 minute interval. noSuchInstance will be
returned if no data is available."
::= { dsx1CurrentEntry 7 }
dsx1CurrentLESs OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of Line Errored Seconds encountered by
a DS1 interface in the current 15 minute interval.
noSuchInstance will be returned if no data is
available."
::= { dsx1CurrentEntry 8 }
dsx1CurrentBESs OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of Bursty Errored Seconds (BESs)
encountered by a DS1 interface in the current 15
minute interval. noSuchInstance will be returned
if no data is available."
::= { dsx1CurrentEntry 9 }
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dsx1CurrentDMs OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of Degraded Minutes (DMs)
encountered by a DS1 interface in the current
15 minute interval. noSuchInstance will be
returned if no data is available."
::= { dsx1CurrentEntry 10 }
dsx1CurrentLCVs OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of Line Code Violations (LCVs)
encountered by a DS1 interface in the current 15
minute interval. noSuchInstance will be returned
if no data is available."
::= { dsx1CurrentEntry 11 }
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-- The DS1 Interval Table
dsx1IntervalTable OBJECT-TYPE
SYNTAX SEQUENCE OF Dsx1IntervalEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The DS1 Interval Table contains various
statistics collected by each DS1 Interface over
the previous 24 hours of operation. The past 24
hours are broken into 96 completed 15 minute
intervals."
::= { ds1 8 }
dsx1IntervalEntry OBJECT-TYPE
SYNTAX Dsx1IntervalEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry in the DS1 Interval table."
INDEX { dsx1IntervalIndex, dsx1IntervalNumber }
::= { dsx1IntervalTable 1 }
Dsx1IntervalEntry ::=
SEQUENCE {
dsx1IntervalIndex InterfaceIndex,
dsx1IntervalNumber INTEGER,
dsx1IntervalESs Gauge32,
dsx1IntervalSESs Gauge32,
dsx1IntervalSEFSs Gauge32,
dsx1IntervalUASs Gauge32,
dsx1IntervalCSSs Gauge32,
dsx1IntervalPCVs Gauge32,
dsx1IntervalLESs Gauge32,
dsx1IntervalBESs Gauge32,
dsx1IntervalDMs Gauge32,
dsx1IntervalLCVs Gauge32,
dsx1IntervalValidData TruthValue
}
dsx1IntervalIndex OBJECT-TYPE
SYNTAX InterfaceIndex
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The index value which uniquely identifies the
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DS1 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 as a dsx1LineIndex
object instance."
::= { dsx1IntervalEntry 1 }
dsx1IntervalNumber OBJECT-TYPE
SYNTAX INTEGER (1..96)
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"A number between 1 and 96, where 1 is the most
recently completed 15 minute interval and 96 is
the 15 minutes interval completed 23 hours and 45
minutes prior to interval 1."
::= { dsx1IntervalEntry 2 }
dsx1IntervalESs OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of Errored Seconds encountered by a
DS1 interface in one of the previous 96,
individual 15 minute, intervals. In the case where
the agent is a proxy and valid data is not
available, return noSuchInstance."
::= { dsx1IntervalEntry 3 }
dsx1IntervalSESs OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of Severely Errored Seconds
encountered by a DS1 interface in one of the
previous 96, individual 15 minute, intervals. In
the case where the agent is a proxy and valid data
is not available, return noSuchInstance."
::= { dsx1IntervalEntry 4 }
dsx1IntervalSEFSs OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
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STATUS current
DESCRIPTION
"The number of Severely Errored Framing Seconds
encountered by a DS1 interface in one of the
previous 96, individual 15 minute, intervals. In
the case where the agent is a proxy and valid data
is not available, return noSuchInstance."
::= { dsx1IntervalEntry 5 }
dsx1IntervalUASs OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of Unavailable Seconds encountered by
a DS1 interface in one of the previous 96,
individual 15 minute, intervals. In the case where
the agent is a proxy and valid data is not
available, return noSuchInstance. This object may
decrease if the occurance of unavailable seconds
occurs across an inteval boundary."
::= { dsx1IntervalEntry 6 }
dsx1IntervalCSSs OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of Controlled Slip Seconds
encountered by a DS1 interface in one of the
previous 96, individual 15 minute, intervals. In
the case where the agent is a proxy and valid data
is not available, return noSuchInstance."
::= { dsx1IntervalEntry 7 }
dsx1IntervalPCVs OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of Path Coding Violations
encountered by a DS1 interface in one of the
previous 96, individual 15 minute, intervals. In
the case where the agent is a proxy and valid data
is not available, return noSuchInstance."
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::= { dsx1IntervalEntry 8 }
dsx1IntervalLESs OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of Line Errored Seconds encountered by
a DS1 interface in one of the previous 96,
individual 15 minute, intervals. In the case where
the agent is a proxy and valid data is not
available, return noSuchInstance."
::= { dsx1IntervalEntry 9 }
dsx1IntervalBESs OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of Bursty Errored Seconds (BESs)
encountered by a DS1 interface in one of the
previous 96, individual 15 minute, intervals. In
the case where the agent is a proxy and valid data
is not available, return noSuchInstance."
::= { dsx1IntervalEntry 10 }
dsx1IntervalDMs OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of Degraded Minutes (DMs)
encountered by a DS1 interface in one of the
previous 96, individual 15 minute, intervals. In
the case where the agent is a proxy and valid data
is not available, return noSuchInstance."
::= { dsx1IntervalEntry 11 }
dsx1IntervalLCVs OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of Line Code Violations (LCVs)
encountered by a DS1 interface in one of the
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previous 96, individual 15 minute, intervals. In
the case where the agent is a proxy and valid data
is not available, return noSuchInstance."
::= { dsx1IntervalEntry 12 }
dsx1IntervalValidData OBJECT-TYPE
SYNTAX TruthValue
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This variable indicates if there is valid data
for this interval."
::= { dsx1IntervalEntry 13 }
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-- The DS1 Total Table
dsx1TotalTable OBJECT-TYPE
SYNTAX SEQUENCE OF Dsx1TotalEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The DS1 Total Table contains the cumulative sum
of the various statistics for the 24 hour period
preceding the current interval."
::= { ds1 9 }
dsx1TotalEntry OBJECT-TYPE
SYNTAX Dsx1TotalEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry in the DS1 Total table."
INDEX { dsx1TotalIndex }
::= { dsx1TotalTable 1 }
Dsx1TotalEntry ::=
SEQUENCE {
dsx1TotalIndex InterfaceIndex,
dsx1TotalESs Gauge32,
dsx1TotalSESs Gauge32,
dsx1TotalSEFSs Gauge32,
dsx1TotalUASs Gauge32,
dsx1TotalCSSs Gauge32,
dsx1TotalPCVs Gauge32,
dsx1TotalLESs Gauge32,
dsx1TotalBESs Gauge32,
dsx1TotalDMs Gauge32,
dsx1TotalLCVs Gauge32
}
dsx1TotalIndex OBJECT-TYPE
SYNTAX InterfaceIndex
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The index value which uniquely identifies the
DS1 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 as a dsx1LineIndex
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object instance."
::= { dsx1TotalEntry 1 }
dsx1TotalESs OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The sum of Errored Seconds encountered by a DS1
interface in the previous 24 hour interval.
Invalid 15 minute intervals count as 0."
::= { dsx1TotalEntry 2 }
dsx1TotalSESs OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of Severely Errored Seconds
encountered by a DS1 interface in the previous
24 hour interval. Invalid 15 minute intervals
count as 0."
::= { dsx1TotalEntry 3 }
dsx1TotalSEFSs OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of Severely Errored Framing Seconds
encountered by a DS1 interface in the previous 24
hour interval. Invalid 15 minute intervals count
as 0."
::= { dsx1TotalEntry 4 }
dsx1TotalUASs OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of Unavailable Seconds encountered by
a DS1 interface in the previous 24 hour interval.
Invalid 15 minute intervals count as 0."
::= { dsx1TotalEntry 5 }
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dsx1TotalCSSs OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of Controlled Slip Seconds
encountered by a DS1 interface in the previous
24 hour interval. Invalid 15 minute intervals
count as 0."
::= { dsx1TotalEntry 6 }
dsx1TotalPCVs OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of Path Coding Violations
encountered by a DS1 interface in the previous
24 hour interval. Invalid 15 minute intervals
count as 0."
::= { dsx1TotalEntry 7 }
dsx1TotalLESs OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of Line Errored Seconds encountered by
a DS1 interface in the previous 24 hour interval.
Invalid 15 minute intervals count as 0."
::= { dsx1TotalEntry 8 }
dsx1TotalBESs OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of Bursty Errored Seconds (BESs)
encountered by a DS1 interface in the previous 24
hour interval. Invalid 15 minute intervals count
as 0."
::= { dsx1TotalEntry 9 }
dsx1TotalDMs OBJECT-TYPE
SYNTAX Gauge32
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MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of Degraded Minutes (DMs)
encountered by a DS1 interface in the previous
24 hour interval. Invalid 15 minute intervals
count as 0."
::= { dsx1TotalEntry 10 }
dsx1TotalLCVs OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of Line Code Violations (LCVs)
encountered by a DS1 interface in the current 15
minute interval. Invalid 15 minute intervals
count as 0."
::= { dsx1TotalEntry 11 }
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-- The DS1 Far End Current Table
dsx1FarEndCurrentTable OBJECT-TYPE
SYNTAX SEQUENCE OF Dsx1FarEndCurrentEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The DS1 Far End Current table contains various
statistics being collected for the current 15
minute interval. The statistics are collected
from the far end messages on the Facilities Data
Link. The definitions are the same as described
for the near-end information."
::= { ds1 10 }
dsx1FarEndCurrentEntry OBJECT-TYPE
SYNTAX Dsx1FarEndCurrentEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry in the DS1 Far End Current table."
INDEX { dsx1FarEndCurrentIndex }
::= { dsx1FarEndCurrentTable 1 }
Dsx1FarEndCurrentEntry ::=
SEQUENCE {
dsx1FarEndCurrentIndex InterfaceIndex,
dsx1FarEndTimeElapsed INTEGER,
dsx1FarEndValidIntervals INTEGER,
dsx1FarEndCurrentESs Gauge32,
dsx1FarEndCurrentSESs Gauge32,
dsx1FarEndCurrentSEFSs Gauge32,
dsx1FarEndCurrentUASs Gauge32,
dsx1FarEndCurrentCSSs Gauge32,
dsx1FarEndCurrentLESs Gauge32,
dsx1FarEndCurrentPCVs Gauge32,
dsx1FarEndCurrentBESs Gauge32,
dsx1FarEndCurrentDMs Gauge32,
dsx1FarEndInvalidIntervals INTEGER
}
dsx1FarEndCurrentIndex OBJECT-TYPE
SYNTAX InterfaceIndex
MAX-ACCESS read-only
STATUS current
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DESCRIPTION
"The index value which uniquely identifies the
DS1 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 dsx1LineIndex
object instance."
::= { dsx1FarEndCurrentEntry 1 }
dsx1FarEndTimeElapsed OBJECT-TYPE
SYNTAX INTEGER (0..899)
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of seconds that have elapsed since
the beginning of the far end current error-
measurement period."
::= { dsx1FarEndCurrentEntry 2 }
dsx1FarEndValidIntervals OBJECT-TYPE
SYNTAX INTEGER (0..96)
MAX-ACCESS read-only
STATUS current
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."
::= { dsx1FarEndCurrentEntry 3 }
dsx1FarEndCurrentESs OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of Far Far End Errored Seconds
encountered by a DS1 interface in the current 15
minute interval. noSuchInstance will be returned
if no data is available."
::= { dsx1FarEndCurrentEntry 4 }
dsx1FarEndCurrentSESs OBJECT-TYPE
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SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of Far End Severely Errored Seconds
encountered by a DS1 interface in the current 15
minute interval. noSuchInstance will be returned
if no data is available."
::= { dsx1FarEndCurrentEntry 5 }
dsx1FarEndCurrentSEFSs OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of Far End Severely Errored Framing
Seconds encountered by a DS1 interface in the
current 15 minute interval. noSuchInstance will be
returned if no data is available."
::= { dsx1FarEndCurrentEntry 6 }
dsx1FarEndCurrentUASs OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of Unavailable Seconds encountered by
a DS1 interface in the current 15 minute interval.
noSuchInstance will be returned if no data is
available."
::= { dsx1FarEndCurrentEntry 7 }
dsx1FarEndCurrentCSSs OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of Far End Controlled Slip Seconds
encountered by a DS1 interface in the current 15
minute interval. noSuchInstance will be returned
if no data is available."
::= { dsx1FarEndCurrentEntry 8 }
dsx1FarEndCurrentLESs OBJECT-TYPE
SYNTAX Gauge32
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MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of Far End Line Errored Seconds
encountered by a DS1 interface in the current 15
minute interval. noSuchInstance will be returned
if no data is available."
::= { dsx1FarEndCurrentEntry 9 }
dsx1FarEndCurrentPCVs OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of Far End Path Coding Violations
reported via the far end block error count
encountered by a DS1 interface in the current 15
minute interval. noSuchInstance will be returned
if no data is available."
::= { dsx1FarEndCurrentEntry 10 }
dsx1FarEndCurrentBESs OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of Bursty Errored Seconds (BESs)
encountered by a DS1 interface in the current 15
minute interval. noSuchInstance will be returned
if no data is available."
::= { dsx1FarEndCurrentEntry 11 }
dsx1FarEndCurrentDMs OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of Degraded Minutes (DMs)
encountered by a DS1 interface in the current
15 minute interval. noSuchInstance will be
returned if no data is available."
::= { dsx1FarEndCurrentEntry 12 }
dsx1FarEndInvalidIntervals OBJECT-TYPE
SYNTAX INTEGER (0..96)
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MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of intervals for which no valid data
is available."
::= { dsx1FarEndCurrentEntry 13 }
-- The DS1 Far End Interval Table
dsx1FarEndIntervalTable OBJECT-TYPE
SYNTAX SEQUENCE OF Dsx1FarEndIntervalEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The DS1 Far End Interval Table contains various
statistics collected by each DS1 interface over
the previous 24 hours of operation. The past 24
hours are broken into 96 completed 15 minute
intervals."
::= { ds1 11 }
dsx1FarEndIntervalEntry OBJECT-TYPE
SYNTAX Dsx1FarEndIntervalEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry in the DS1 Far End Interval table."
INDEX { dsx1FarEndIntervalIndex,
dsx1FarEndIntervalNumber }
::= { dsx1FarEndIntervalTable 1 }
Dsx1FarEndIntervalEntry ::=
SEQUENCE {
dsx1FarEndIntervalIndex InterfaceIndex,
dsx1FarEndIntervalNumber INTEGER,
dsx1FarEndIntervalESs Gauge32,
dsx1FarEndIntervalSESs Gauge32,
dsx1FarEndIntervalSEFSs Gauge32,
dsx1FarEndIntervalUASs Gauge32,
dsx1FarEndIntervalCSSs Gauge32,
dsx1FarEndIntervalLESs Gauge32,
dsx1FarEndIntervalPCVs Gauge32,
dsx1FarEndIntervalBESs Gauge32,
dsx1FarEndIntervalDMs Gauge32
}
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dsx1FarEndIntervalIndex OBJECT-TYPE
SYNTAX InterfaceIndex
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The index value which uniquely identifies the
DS1 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 as a dsx1LineIndex
object instance."
::= { dsx1FarEndIntervalEntry 1 }
dsx1FarEndIntervalNumber OBJECT-TYPE
SYNTAX INTEGER (1..96)
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"A number between 1 and 96, where 1 is the most
recently completed 15 minute interval and 96 is
the 15 minutes interval completed 23 hours and 45
minutes prior to interval 1."
::= { dsx1FarEndIntervalEntry 2 }
dsx1FarEndIntervalESs OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of Far End Errored Seconds
encountered by a DS1 interface in one of the
previous 96, individual 15 minute, intervals. In
the case where the agent is a proxy and valid data
is not available, return noSuchInstance."
::= { dsx1FarEndIntervalEntry 3 }
dsx1FarEndIntervalSESs OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of Far End Severely Errored Seconds
encountered by a DS1 interface in one of the
previous 96, individual 15 minute, intervals. In
the case where the agent is a proxy and valid data
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is not available, return noSuchInstance."
::= { dsx1FarEndIntervalEntry 4 }
dsx1FarEndIntervalSEFSs OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of Far End Severely Errored Framing
Seconds encountered by a DS1 interface in one of
the previous 96, individual 15 minute,
intervals. In the case where the agent is a proxy
and valid data is not available, return
noSuchInstance."
::= { dsx1FarEndIntervalEntry 5 }
dsx1FarEndIntervalUASs OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of Unavailable Seconds encountered by
a DS1 interface in one of the previous 96,
individual 15 minute, intervals. In the case where
the agent is a proxy and valid data is not
available, return noSuchInstance."
::= { dsx1FarEndIntervalEntry 6 }
dsx1FarEndIntervalCSSs OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of Far End Controlled Slip Seconds
encountered by a DS1 interface in one of the
previous 96, individual 15 minute, intervals. In
the case where the agent is a proxy and valid data
is not available, return noSuchInstance."
::= { dsx1FarEndIntervalEntry 7 }
dsx1FarEndIntervalLESs OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
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"The number of Far End Line Errored Seconds
encountered by a DS1 interface in one of the
previous 96, individual 15 minute, intervals. In
the case where the agent is a proxy and valid data
is not available, return noSuchInstance."
::= { dsx1FarEndIntervalEntry 8 }
dsx1FarEndIntervalPCVs OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of Far End Path Coding Violations
reported via the far end block error count
encountered by a DS1 interface in one of the
previous 96, individual 15 minute, intervals. In
the case where the agent is a proxy and valid data
is not available, return noSuchInstance."
::= { dsx1FarEndIntervalEntry 9 }
dsx1FarEndIntervalBESs OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of Bursty Errored Seconds (BESs)
encountered by a DS1 interface in one of the
previous 96, individual 15 minute, intervals. In
the case where the agent is a proxy and valid data
is not available, return noSuchInstance."
::= { dsx1FarEndIntervalEntry 10 }
dsx1FarEndIntervalDMs OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of Degraded Minutes (DMs)
encountered by a DS1 interface in one of the
previous 96, individual 15 minute, intervals. In
the case where the agent is a proxy and valid data
is not available, return noSuchInstance."
::= { dsx1FarEndIntervalEntry 11 }
-- The DS1 Far End Total Table
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dsx1FarEndTotalTable OBJECT-TYPE
SYNTAX SEQUENCE OF Dsx1FarEndTotalEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The DS1 Far End Total Table contains the
cumulative sum of the various statistics for the
24 hour period preceding the current interval."
::= { ds1 12 }
dsx1FarEndTotalEntry OBJECT-TYPE
SYNTAX Dsx1FarEndTotalEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry in the DS1 Far End Total table."
INDEX { dsx1FarEndTotalIndex }
::= { dsx1FarEndTotalTable 1 }
Dsx1FarEndTotalEntry ::=
SEQUENCE {
dsx1FarEndTotalIndex InterfaceIndex,
dsx1FarEndTotalESs Gauge32,
dsx1FarEndTotalSESs Gauge32,
dsx1FarEndTotalSEFSs Gauge32,
dsx1FarEndTotalUASs Gauge32,
dsx1FarEndTotalCSSs Gauge32,
dsx1FarEndTotalLESs Gauge32,
dsx1FarEndTotalPCVs Gauge32,
dsx1FarEndTotalBESs Gauge32,
dsx1FarEndTotalDMs Gauge32
}
dsx1FarEndTotalIndex OBJECT-TYPE
SYNTAX InterfaceIndex
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The index value which uniquely identifies the
DS1 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 dsx1LineIndex
object instance."
::= { dsx1FarEndTotalEntry 1 }
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dsx1FarEndTotalESs OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of Far End Errored Seconds
encountered by a DS1 interface in the previous
24 hour interval. Invalid 15 minute intervals
count as 0."
::= { dsx1FarEndTotalEntry 2 }
dsx1FarEndTotalSESs OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of Far End Severely Errored Seconds
encountered by a DS1 interface in the previous 24
hour interval. Invalid 15 minute intervals count
as 0."
::= { dsx1FarEndTotalEntry 3 }
dsx1FarEndTotalSEFSs OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of Far End Severely Errored Framing
Seconds encountered by a DS1 interface in the
previous 24 hour interval. Invalid 15 minute
intervals count as 0."
::= { dsx1FarEndTotalEntry 4 }
dsx1FarEndTotalUASs OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of Unavailable Seconds encountered by
a DS1 interface in the previous 24 hour interval.
Invalid 15 minute intervals count as 0."
::= { dsx1FarEndTotalEntry 5 }
dsx1FarEndTotalCSSs OBJECT-TYPE
SYNTAX Gauge32
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MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of Far End Controlled Slip Seconds
encountered by a DS1 interface in the previous 24
hour interval. Invalid 15 minute intervals count
as 0."
::= { dsx1FarEndTotalEntry 6 }
dsx1FarEndTotalLESs OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of Far End Line Errored Seconds
encountered by a DS1 interface in the previous 24
hour interval. Invalid 15 minute intervals count
as 0."
::= { dsx1FarEndTotalEntry 7 }
dsx1FarEndTotalPCVs OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of Far End Path Coding Violations
reported via the far end block error count
encountered by a DS1 interface in the previous 24
hour interval. Invalid 15 minute intervals count
as 0."
::= { dsx1FarEndTotalEntry 8 }
dsx1FarEndTotalBESs OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of Bursty Errored Seconds (BESs)
encountered by a DS1 interface in the previous 24
hour interval. Invalid 15 minute intervals count
as 0."
::= { dsx1FarEndTotalEntry 9 }
dsx1FarEndTotalDMs OBJECT-TYPE
SYNTAX Gauge32
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MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of Degraded Minutes (DMs)
encountered by a DS1 interface in the previous
24 hour interval. Invalid 15 minute intervals
count as 0."
::= { dsx1FarEndTotalEntry 10 }
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-- The DS1 Fractional Table
dsx1FracTable OBJECT-TYPE
SYNTAX SEQUENCE OF Dsx1FracEntry
MAX-ACCESS not-accessible
STATUS deprecated
DESCRIPTION
"This table is deprecated.
It was mandatory for systems dividing a DS1 into
channels containing different data streams that
are of local interest. Systems which are
indifferent to data content, such as CSUs, need
not implement it.
The DS1 fractional table identifies which DS1
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 an application managing a
North American ISDN Primary Rate link whose
division is a 384 kbit/s H1 _B_ Channel for Video,
a second H1 for data to a primary routing peer,
and 12 64 kbit/s H0 _B_ Channels. Consider that
some subset of the H0 channels are used for voice
and the remainder are available for dynamic data
calls.
We count a total of 14 interfaces multiplexed onto
the DS1 interface. Six DS1 channels (for the sake
of the example, channels 1..6) are used for Video,
six more (7..11 and 13) are used for data, and the
remaining 12 are are in channels 12 and 14..24.
Let us further imagine that ifIndex 2 is of type
DS1 and refers to the DS1 interface, and that the
interfaces layered onto it are numbered 3..16.
We might describe the allocation of channels, in
the dsx1FracTable, as follows:
dsx1FracIfIndex.2. 1 = 3 dsx1FracIfIndex.2.13 = 4
dsx1FracIfIndex.2. 2 = 3 dsx1FracIfIndex.2.14 = 6
dsx1FracIfIndex.2. 3 = 3 dsx1FracIfIndex.2.15 = 7
dsx1FracIfIndex.2. 4 = 3 dsx1FracIfIndex.2.16 = 8
dsx1FracIfIndex.2. 5 = 3 dsx1FracIfIndex.2.17 = 9
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dsx1FracIfIndex.2. 6 = 3 dsx1FracIfIndex.2.18 = 10
dsx1FracIfIndex.2. 7 = 4 dsx1FracIfIndex.2.19 = 11
dsx1FracIfIndex.2. 8 = 4 dsx1FracIfIndex.2.20 = 12
dsx1FracIfIndex.2. 9 = 4 dsx1FracIfIndex.2.21 = 13
dsx1FracIfIndex.2.10 = 4 dsx1FracIfIndex.2.22 = 14
dsx1FracIfIndex.2.11 = 4 dsx1FracIfIndex.2.23 = 15
dsx1FracIfIndex.2.12 = 5 dsx1FracIfIndex.2.24 = 16
For North American (DS1) interfaces, there are 24
legal channels, numbered 1 through 24.
For G.704 interfaces, there are 31 legal channels,
numbered 1 through 31. The channels (1..31)
correspond directly to the equivalently numbered
time-slots."
::= { ds1 13 }
dsx1FracEntry OBJECT-TYPE
SYNTAX Dsx1FracEntry
MAX-ACCESS not-accessible
STATUS deprecated
DESCRIPTION
"An entry in the DS1 Fractional table."
INDEX { dsx1FracIndex, dsx1FracNumber }
::= { dsx1FracTable 1 }
Dsx1FracEntry ::=
SEQUENCE {
dsx1FracIndex INTEGER,
dsx1FracNumber INTEGER,
dsx1FracIfIndex INTEGER
}
dsx1FracIndex OBJECT-TYPE
SYNTAX INTEGER (1..'7fffffff'h)
MAX-ACCESS read-only
STATUS deprecated
DESCRIPTION
"The index value which uniquely identifies the
DS1 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 dsx1LineIndex
object instance."
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::= { dsx1FracEntry 1 }
dsx1FracNumber OBJECT-TYPE
SYNTAX INTEGER (1..31)
MAX-ACCESS read-only
STATUS deprecated
DESCRIPTION
"The channel number for this entry."
::= { dsx1FracEntry 2 }
dsx1FracIfIndex OBJECT-TYPE
SYNTAX INTEGER (1..'7fffffff'h)
MAX-ACCESS read-write
STATUS deprecated
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."
::= { dsx1FracEntry 3 }
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-- Ds1 TRAPS
ds1Traps OBJECT IDENTIFIER ::= { ds1 15 }
dsx1LineStatusChange NOTIFICATION-TYPE
OBJECTS { dsx1LineStatus,
dsx1LineStatusLastChange }
STATUS current
DESCRIPTION
"A dsx1LineStatusChange trap is sent when the
value of an instance dsx1LineStatus changes. It
can be utilized by an NMS to trigger polls. When
the line status change results from a higher level
line status change (i.e. ds3), then no traps for
the ds1 are sent."
::= { ds1Traps 1 }
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-- conformance information
ds1Conformance OBJECT IDENTIFIER ::= { ds1 14 }
ds1Groups OBJECT IDENTIFIER ::= { ds1Conformance 1 }
ds1Compliances OBJECT IDENTIFIER ::= { ds1Conformance 2 }
-- compliance statements
ds1Compliance MODULE-COMPLIANCE
STATUS current
DESCRIPTION
"The compliance statement for T1 and E1
interfaces."
MODULE -- this module
MANDATORY-GROUPS { ds1NearEndConfigGroup,
ds1NearEndCurrentGroup,
ds1NearEndIntervalGroup,
ds1NearEndTotalGroup }
GROUP ds1FarEndGroup
DESCRIPTION
"Implementation of this group is optional for all
systems that attach to a DS1 Interface."
GROUP ds1NearEndOptionalConfigGroup
DESCRIPTION
"Implementation of this group is optional for all
systems that attach to a DS1 Interface."
GROUP ds1DS2Group
DESCRIPTION
"Implementation of this group is mandatory for all
systems that attach to a DS2 Interface."
GROUP ds1TransStatsGroup
DESCRIPTION
"This group is the set of statistics appropriate
for all systems which attach to a DS1 Interface
running transparent or unFramed lineType."
::= { ds1Compliances 1 }
ds1MibT1PriCompliance MODULE-COMPLIANCE
STATUS current
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DESCRIPTION
"Compliance statement for using this MIB for ISDN
Primary Rate interfaces on T1 lines."
MODULE
MANDATORY-GROUPS { ds1NearEndConfigGroup,
ds1NearEndCurrentGroup,
ds1NearEndIntervalGroup,
ds1NearEndTotalGroup }
OBJECT dsx1LineType
SYNTAX INTEGER {
dsx1ESF(2) -- Intl Spec would be G704(2)
-- or I.431(4)
}
MIN-ACCESS read-only
DESCRIPTION
"Line type for T1 ISDN Primary Rate
interfaces."
OBJECT dsx1LineCoding
SYNTAX INTEGER {
dsx1B8ZS(2)
}
MIN-ACCESS read-only
DESCRIPTION
"Type of Zero Code Suppression for
T1 ISDN Primary Rate interfaces."
OBJECT dsx1SignalMode
SYNTAX INTEGER {
none(1), -- if there is no signaling channel
messageOriented(4)
}
MIN-ACCESS read-only
DESCRIPTION
"Possible signaling modes for
T1 ISDN Primary Rate interfaces."
OBJECT dsx1TransmitClockSource
SYNTAX INTEGER {
loopTiming(1)
}
MIN-ACCESS read-only
DESCRIPTION
"The transmit clock is derived from
received clock on ISDN Primary Rate
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interfaces."
OBJECT dsx1Fdl
MIN-ACCESS read-only
DESCRIPTION
"Facilities Data Link usage on T1 ISDN
Primary Rate interfaces.
Note: Eventually dsx1Att-54016(4) is to be
used here since the line type is ESF."
::= { ds1Compliances 2 }
ds1MibE1PriCompliance MODULE-COMPLIANCE
STATUS current
DESCRIPTION
"Compliance statement for using this MIB for ISDN
Primary Rate interfaces on E1 lines."
MODULE
MANDATORY-GROUPS { ds1NearEndConfigGroup,
ds1NearEndCurrentGroup,
ds1NearEndIntervalGroup,
ds1NearEndTotalGroup }
OBJECT dsx1LineType
SYNTAX INTEGER {
dsx1E1CRC(5)
}
MIN-ACCESS read-only
DESCRIPTION
"Line type for E1 ISDN Primary Rate
interfaces."
OBJECT dsx1LineCoding
SYNTAX INTEGER {
dsx1HDB3(3)
}
MIN-ACCESS read-only
DESCRIPTION
"Type of Zero Code Suppression for
E1 ISDN Primary Rate interfaces."
OBJECT dsx1SignalMode
SYNTAX INTEGER {
messageOriented(4)
}
MIN-ACCESS read-only
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DESCRIPTION
"Signaling on E1 ISDN Primary Rate interfaces
is always message oriented."
OBJECT dsx1TransmitClockSource
SYNTAX INTEGER {
loopTiming(1)
}
MIN-ACCESS read-only
DESCRIPTION
"The transmit clock is derived from received
clock on ISDN Primary Rate interfaces."
OBJECT dsx1Fdl
MIN-ACCESS read-only
DESCRIPTION
"Facilities Data Link usage on E1 ISDN
Primary Rate interfaces.
Note: There is a 'M-Channel' in E1,
using National Bit Sa4 (G704,
Table 4a). It is used to implement
management features between ET
and NT. This is different to
FDL in T1, which is used to carry
control signals and performance
data. In E1, control and status
signals are carried using National
Bits Sa5, Sa6 and A (RAI Ind.).
This indicates that only the other(1) or
eventually the dsx1Fdl-none(8) bits should
be set in this object for E1 PRI."
::= { ds1Compliances 3 }
-- units of conformance
ds1NearEndConfigGroup OBJECT-GROUP
OBJECTS { dsx1TimeElapsed,
dsx1ValidIntervals,
dsx1LineType,
dsx1LineCoding,
dsx1SendCode,
dsx1LoopbackConfig,
dsx1LineStatus,
dsx1SignalMode,
dsx1TransmitClockSource,
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dsx1Fdl,
dsx1InvalidIntervals,
dsx1LineLength }
STATUS current
DESCRIPTION
"A collection of objects providing configuration
information applicable to all DS1 interfaces."
::= { ds1Groups 1 }
ds1NearEndCurrentGroup OBJECT-GROUP
OBJECTS { dsx1CurrentIndex,
dsx1CurrentESs,
dsx1CurrentSESs,
dsx1CurrentSEFSs,
dsx1CurrentUASs,
dsx1CurrentCSSs,
dsx1CurrentPCVs,
dsx1CurrentLESs,
dsx1CurrentBESs,
dsx1CurrentDMs,
dsx1CurrentLCVs }
STATUS current
DESCRIPTION
"A collection of objects providing statistics
information for the current interval applicable to
all DS1 interfaces."
::= { ds1Groups 2 }
ds1NearEndIntervalGroup OBJECT-GROUP
OBJECTS { dsx1IntervalIndex,
dsx1IntervalNumber,
dsx1IntervalESs,
dsx1IntervalSESs,
dsx1IntervalSEFSs,
dsx1IntervalUASs,
dsx1IntervalCSSs,
dsx1IntervalPCVs,
dsx1IntervalLESs,
dsx1IntervalBESs,
dsx1IntervalDMs,
dsx1IntervalLCVs,
dsx1IntervalValidData }
STATUS current
DESCRIPTION
"A collection of objects providing statistics
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information for the last 96 intervals applicable
to all DS1 interfaces."
::= { ds1Groups 3 }
ds1NearEndTotalGroup OBJECT-GROUP
OBJECTS { dsx1TotalIndex,
dsx1TotalESs,
dsx1TotalSESs,
dsx1TotalSEFSs,
dsx1TotalUASs,
dsx1TotalCSSs,
dsx1TotalPCVs,
dsx1TotalLESs,
dsx1TotalBESs,
dsx1TotalDMs,
dsx1TotalLCVs }
STATUS current
DESCRIPTION
"A collection of objects providing statistics
information for the total of the last 96 intervals
applicable to all DS1 interfaces."
::= { ds1Groups 4 }
ds1FarEndGroup OBJECT-GROUP
OBJECTS { dsx1FarEndCurrentIndex,
dsx1FarEndTimeElapsed,
dsx1FarEndValidIntervals,
dsx1FarEndCurrentESs,
dsx1FarEndCurrentSESs,
dsx1FarEndCurrentSEFSs,
dsx1FarEndCurrentUASs,
dsx1FarEndCurrentCSSs,
dsx1FarEndCurrentLESs,
dsx1FarEndCurrentPCVs,
dsx1FarEndCurrentBESs,
dsx1FarEndCurrentDMs,
dsx1FarEndInvalidIntervals,
dsx1FarEndIntervalIndex,
dsx1FarEndIntervalNumber,
dsx1FarEndIntervalESs,
dsx1FarEndIntervalSESs,
dsx1FarEndIntervalSEFSs,
dsx1FarEndIntervalUASs,
dsx1FarEndIntervalCSSs,
dsx1FarEndIntervalLESs,
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dsx1FarEndIntervalPCVs,
dsx1FarEndIntervalBESs,
dsx1FarEndIntervalDMs,
dsx1FarEndTotalIndex,
dsx1FarEndTotalESs,
dsx1FarEndTotalSESs,
dsx1FarEndTotalSEFSs,
dsx1FarEndTotalUASs,
dsx1FarEndTotalCSSs,
dsx1FarEndTotalLESs,
dsx1FarEndTotalPCVs,
dsx1FarEndTotalBESs,
dsx1FarEndTotalDMs }
STATUS current
DESCRIPTION
"A collection of objects providing remote
configuration and statistics information."
::= { ds1Groups 5 }
ds1DeprecatedGroup OBJECT-GROUP
OBJECTS { dsx1IfIndex,
dsx1CircuitIdentifier,
dsx1FracIndex,
dsx1FracNumber,
dsx1FracIfIndex }
STATUS deprecated
DESCRIPTION
"A collection of obsolete objects that may be
implemented for backwards compatibility."
::= { ds1Groups 6 }
ds1NearEndOptionalConfigGroup OBJECT-GROUP
OBJECTS { dsx1LineStatusLastChange,
dsx1LineStatusChangeTrapEnable }
STATUS current
DESCRIPTION
"A collection of objects that may be implemented
on DS1 and DS2 interfaces."
::= { ds1Groups 7 }
ds1DS2Group OBJECT-GROUP
OBJECTS { dsx1LineIndex,
dsx1LineType,
dsx1LineCoding,
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dsx1SendCode,
dsx1LineStatus,
dsx1SignalMode,
dsx1TransmitClockSource }
STATUS current
DESCRIPTION
"A collection of objects providing
information about DS2 (6,312 kbps)
systems."
::= { ds1Groups 8 }
ds1TransStatsGroup OBJECT-GROUP
OBJECTS { dsx1CurrentESs,
dsx1CurrentSESs,
dsx1CurrentUASs,
dsx1IntervalESs,
dsx1IntervalSESs,
dsx1IntervalUASs,
dsx1TotalESs,
dsx1TotalSESs,
dsx1TotalUASs }
STATUS current
DESCRIPTION
"A collection of objects which are the
statistics which can be collected from a ds1
interface that is running transparent or unframed
lineType. Statistics not in this list should
return noSuchInstance."
::= { ds1Groups 9 }
END
5. Appendix A - Use of dsx1IfIndex and dsx1LineIndex
This Appendix was formerly section 3.1 of rfc1406. It is placed here
for reference purposes after it was decided that using dsx1IfIndex
and dsx1LineIndex was not required once ifStackTable was made
available.
Different physical configurations for the support of SNMP with DS1
equipment exist. To accommodate these scenarios, two different
indices for DS1 interfaces are introduced in this MIB. These indices
are dsx1IfIndex and dsx1LineIndex.
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External interface scenario: the SNMP Agent represents all managed
DS1 lines as external interfaces (for example, an Agent residing on
the device supporting DS1 interfaces directly):
For this scenario, all interfaces are assigned an integer value equal
to ifIndex, and the following applies:
ifIndex=dsx1IfIndex=dsx1LineIndex for all interfaces.
The dsx1IfIndex column of the DS1 Configuration table relates each
DS1 interface to its corresponding interface (ifIndex) in the
Internet-standard MIB (MIB-II STD 17, RFC1213).
External&Internal interface scenario: the SNMP Agents resides on an
host external from the device supporting DS1 interfaces (e.g., a
router). The Agent represents both the host and the DS1 device. The
index dsx1LineIndex is used to not only represent the DS1 interfaces
external from the host/DS1-device combination, but also the DS1
interfaces connecting the host and the DS1 device. The index
dsx1IfIndex 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:
+-----+
| | |
| | | +---------------------+
|E | | 1.544 MBPS | Line#A | DS1 Link
|t | R |---------------+ - - - - - - - - - +------>
|h | | | |
|e | O | 1.544 MBPS | Line#B | DS1 Link
|r | |---------------+ - - - - - - - - - - +------>
|n | U | | CSU Shelf |
|e | | 1.544 MBPS | Line#C | DS1 Link
|t | T |---------------+ - - - -- -- - - - - +------>
| | | | |
|-----| E | 1.544 MBPS | Line#D | DS1 Link
| | |---------------+ - - - - -- - - - - +------>
| | R | |_____________________|
| | |
| +-----+
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The assignment of the index values could for example be:
ifIndex (= dsx1IfIndex) dsx1LineIndex
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 dsx1LineIndex: the dsx1LineIndex identifies a DS1
Interface on a managed device. If there is an ifEntry that is
directly associated with this and only this DS1 interface, it should
have the same value as ifIndex. Otherwise, number the
dsx1LineIndices 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:
ifIndex (= dsx1IfIndex) dsx1LineIndex
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
6. Appendix B - The delay approach to Unavialable Seconds.
This procedure is illustrated below for a DS1 ESF interface. Similar
rules would apply for other DS1, DS2, and E1 interface variants. The
procedure guarantees that the statistical counters are correctly
updated at all times, although they lag real time by 10 seconds. At
the end of each 15 minutes interval the current interval counts are
transferred to the most recent interval entry and each interval is
shifted up by one position, with the oldest being discarded if
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necessary in order to make room. The current interval counts then
start over from zero. Note, however, that the signal state
calculation does not start afresh at each interval boundary; rather,
signal state information is retained across interval boundaries.
+---------------------------------------------------------------------+
| READ COUNTERS & STATUS INFO FROM HARDWARE |
| |
| BPV EXZ LOS FE CRC CS AIS SEF OOF LOF RAI G1-G6 SE FE LV SL |
+---------------------------------------------------------------------+
| | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | |
V V V V V V V V V V V V V V V V
+---------------------------------------------------------------------+
| ACCUM ONE-SEC STATS, CHK ERR THRESHOLDS, & UPDT SIGNAL STATE |
| |
| |<---------- NEAR END ----------->| |<-------- FAR END ------>| |
| |
| LCV LES PCV ES CSS BES SES SEFS A/U PCV ES CSS BES SES SEFS A/U |
+---------------------------------------------------------------------+
| | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | |
V V V V V V V V | V V V V V V |
+------------------------------+ | +----------------------+ |
| ONE-SEC DELAY | | | ONE-SEC DELAY | |
| (1 OF 10) | | | (1 OF 10) | |
+------------------------------+ | +----------------------+ |
| | | | | | | | | | | | | | | |
/ / / / / / / / / / / / / / / /
| | | | | | | | | | | | | | | |
V V V V V V V V | V V V V V V |
+------------------------------+ | +----------------------+ |
| ONE-SEC DELAY | | | ONE-SEC DELAY | |
| (10 OF 10) | | | (10 OF 10) | |
+------------------------------+ | +----------------------+ |
| | | | | | | | | | | | | | | |
V V V V V V V V V V V V V V V V
+---------------------------------------------------------------------+
| UPDATE STATISTICS COUNTERS |
| |
|<-------------- NEAR END ----------->| |<--------- FAR END --------->|
| |
|LCV LES PCV ES CSS BES SES SEFS UAS DM PCV ES CSS BES SES SEFS UAS DM|
+---------------------------------------------------------------------+
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Note that if such a procedure is adopted there is no current interval
data for the first ten seconds after a system comes up.
noSuchInstance must be returned if a management station attempts to
access the current interval counters during this time.
It is an implementation-specific matter whether an agent assumes that
the initial state of the interface is available or unavailable.
7. Acknowledgments
This document was produced by the Trunk MIB Working Group:
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8. References
[1] SNMPv2 Working Group, Case, J., McCloghrie, K., Rose, M., and
S. Waldbusser, "Structure of Management Information for Version 2
of the Simple Network Management Protocol (SNMPv2)", RFC 1902,
January 1996.
[2] McCloghrie, K., and M. Rose, Editors, "Management
Information Base for Network Management of TCP/IP-based
internets: MIB-II", STD 17, RFC 1213, Hughes LAN Systems,
Performance Systems International, March 1991.
[3] Case, J., Fedor, M., Schoffstall, M., and J. Davin. " A Simple
Network Management Protocol (SNMP)", STD 15, RFC 1157, SNMP
Research, Performance Systems International, MIT Lab for
Computer Science, May 1990.
[4] SNMPv2 Working Group, Case, J., McCloghrie, K., Rose, M., and
S. Waldbusser, "Protocol Operations for Version 2 of the Simple
Network Management Protocol (SNMPv2)", RFC 1905, January 1996.
[5] McCloghrie, K. and F. Kastenholz, "Evolution of the
Interfaces Group of MIB-II", RFC 1573, Hughes LAN
Systems, FTP Software, January 1994.
[6] AT&T Information Systems, AT&T ESF DS1 Channel Service Unit
User's Manual, 999-100-305, February 1988.
[7] AT&T Technical Reference, Requirements for Interfacing Digital
Terminal Equipment to Services Employing the Extended Superframe
Format, Publication 54016, May 1988.
[8] American National Standard for Telecommunications -- Carrier-to-
Customer Installation - DS1 Metallic Interface, T1.403, February
1989.
[9] CCITT Specifications Volume III, Recommendation G.703,
Physical/Electrical Characteristics of Hierarchical Digital
Interfaces, July 1988.
[10] CCITT Specifications Volume III, Recommendation G.704,
Synchronous frame structures used at primary and secondary
hierarchical levels, July 1988.
[11] American National Standard for Telecommunications -- Digital
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Hierarchy -- Layer 1 In-Service Digital Transmission
Performace Monitoring, T1.231, Sept 1993.
[12] CCITT Specifications Volume IV, Recommendation O.162, Equipment
To Perform In Service Monitoring On 2048 kbit/s Signals, July
1988
[13] CCITT Specifications Volume III, Recommendation G.821, Error
Performance Of An International Digital Connection Forming Part
Of An Integrated Services Digital Network, July 1988.
[14] AT&T Technical Reference, Technical Reference 62411, ACCUNET T1.5
Service Description And Interface Specification, December 1990.
[15] CCITT Specifications Volume III, Recommendation G.706, Frame
Alignment and Cyclic Redundancy Check (CRC) Procedures Relating
to Basic Frame Structures Defined in Recommendation G.704, July
1988.
[16] CCITT Specifications Volume III, Recommendation G.732,
Characteristics Of Primary PCM Multiplex Equipment Operating at
2048 kbit/s, July 1988.
[17] Fowler, D., "Definitions of Managed Objects for the DS3/E3
Interface Types", draft-ietf-trunkmib-ds3-mib-02.txt,
Newbridge Networks, February 1996
[18] Brown, T., and Tesink, K., "Definitions of Managed Objects
for the SONET/SDH Interface Type", RFC1595, Bell Communications
Research, March 1994.
[19] Fowler, D., "Definitions of Managed Objects for the Ds0 and
DS0Bundle Interface Types", draft-ietf-trunkmib-ds0-mib-02.txt,
Newbridge Networks, March 1996.
[20] ITU-T G.775: Loss of signal (LOS) and alarm indication
signal (AIS) defect detection and clearance criteria, May 1995.
[21] McCloghrie, K. and F. Kastenholz, "Evolution of the
Interfaces Group of MIB-II", draft-ietf-ifmib-mib-03.txt,
Cisco, FTP Software, January 1994.
[22] ITU-T G.826: Error performance parameters and objectives for
international, constant bit rate digital paths at or above
the primary rate, November 1993.
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9. Security Considerations
Security issues are not discussed in this memo.
10. Authors' Addresses
David Fowler
Newbridge Networks
600 March Road
Kanata, Ontario, Canada K2K 2E6
Phone: (613) 599-3600, ext 3538
EMail: davef@newbridge.com
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Table of Contents
1 The SNMPv2 Network Management Framework ...................... 2
2 Object Definitions ........................................... 3
2.1 Changes from RFC1406 ....................................... 3
3 Overview ..................................................... 5
3.1 Use of ifTable for DS1 Layer ............................... 5
3.2 Using ifStackTable ......................................... 6
3.3 Objectives of this MIB Module .............................. 8
3.4 DS1 Terminology ............................................ 9
3.4.1 Error Events ............................................. 9
3.4.2 Performance Defects ...................................... 10
3.4.3 Performance Parameters ................................... 11
3.4.4 Failure States ........................................... 15
3.4.5 Other Terms .............................................. 18
4 Object Definitions ........................................... 19
5.1 The DS1 Near End Group ..................................... 20
5.1.1 The DS1 Configuration Table .............................. 20
5.1.2 The DS1 Current Table .................................... 31
5.1.3 The DS1 Interval Table ................................... 35
5.1.4 The DS1 Total Table ...................................... 40
5.2 The DS1 Far End Group ...................................... 44
5.2.1 The DS1 Far End Current Table ............................ 44
5.2.2 The DS1 Far End Interval Table ........................... 48
5.2.3 The DS1 Far End Total Table .............................. 51
5.3 The DS1 Fractional Table ................................... 56
5.5 The DS1 Trap Group ......................................... 59
5.4 Conformance Groups ......................................... 60
5 Appendix A - Use of dsx1IfIndex and dsx1LineIndex ............ 67
6 Appendix B - The delay approach to Unavialable Seconds. ..... 69
7 Acknowledgments .............................................. 71
8 References ................................................... 72
9 Security Considerations ...................................... 74
10 Authors' Addresses .......................................... 74
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