Internet Draft SONET/SDH Objects August 26, 1996
Definitions of Managed Objects
for the SONET/SDH Interface Type
August 26, 1996
AToM MIB Working Group
Kaj Tesink
Bell Communications Research
331 Newman Springs Road
Red Bank, NJ 07701
kaj@cc.bellcore.com
<draft-ietf-atommib-sonetng-02.txt>
1. Status of this Memo
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Distribution of this document is unlimited.
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2. Abstract
This memo defines an experimental portion of the Management
Information Base (MIB) for use with network management
protocols in TCP/IP-based internets. In particular, it
defines objects for managing Synchronous Optical
Network/Synchronous Digital Hierarchy (SONET/SDH) objects.
This document is a companion document with Definitions of
Managed Objects for the DS1/E1 and DS3/E3 Interface Types,
RFC1406 [14] and RFC1407 [13].
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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3. The SNMP Network Management Framework
The SNMP Network Management Framework presently consists of
three major components. They are:
0 RFC 1902 which defines the SMI, the mechanisms used for
describing and naming objects for the purpose of
management.
0 RFC 1213 defines MIB-II, the core set of managed objects
for the Internet suite of protocols.
0 RFC 1157 and RFC 1905 which define two versions of the
protocol used for network access to managed objects.
The Framework permits new objects to be defined for the
purpose of experimentation and evaluation.
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4. Objects
Managed objects are accessed via a virtual information store,
termed the Management Information Base or MIB. Objects in the
MIB are defined using the subset of Abstract Syntax Notation
One (ASN.1) [7] defined in the SMI. In particular, each
object has a name, a syntax, and an encoding. The name is an
object identifier, an administratively assigned name, which
specifies an object type. The object type together with an
object instance serves to uniquely identify a specific
instantiation of the object. For human convenience, we often
use a textual string, termed the OBJECT DESCRIPTOR, to also
refer to the object type.
The syntax of an object type defines the abstract data
structure corresponding to that object type. The ASN.1
language is used for this purpose. However, the SMI RFC 1902
purposely restricts the ASN.1 constructs which may be used.
These restrictions are explicitly made for simplicity.
The encoding of an object type is simply how that object type
is represented using the object type's syntax. Implicitly
tied to the notion of an object type's syntax and encoding is
how the object type is represented when being transmitted on
the network. The SMI specifies the use of the basic encoding
rules of ASN.1 [8], subject to the additional requirements
imposed by the SNMP.
4.1. Format of Definitions
Section 6 contains contains the specification of all object
types contained in this MIB module. The object types are
defined using the conventions defined in the SMI, as amended
by the extensions specified in the SNMPv2 SMI.
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5. Overview
These objects are used when the particular media being used to
realize an interface is a SONET/SDH interface. At present,
this applies to these values of the ifType variable in the
Internet-standard MIB:
sonet (39), sonetPath (50), sonetVT (51)
The definitions contained herein are based on the SONET/SDH
specifications in ANSI T1.105 and T1.106-1988 [9, 9a, 10] and
CCITT G.707, 708, 709, and G.783 [15-18].
5.1. Use of the ifTable
This section specifies how the MIB II interfaces group, as
defined in [12], is used for SONET/SDH interfaces. The
SONET/SDH layers support several multiplexing possibilities.
For example in SONET, an Synchronous Transport Signal 3 (STS-
3) has 3 SONET Paths, and a STS-3c has 1 SONET Path. Another
example could be a STS-12 having 4 SONET STS-3c Paths.
Similarly, a SONET Synchronous Payload Envelope (SPE) can
carry many Virtual Tributaries (VTs), for example, one SONET
SPE can carry 28 VT1.5s. It is important to note that an SPE
and a VT in SONET is collectively referred to as a Virtual
Container (VC) in SDH. Also, an STS is called Synchronous
Transport Module (STM) in SDH.
Not all SONET/SDH equipment terminate all SONET/SDH layers.
For example, an SONET/SDH STE regenerator terminates SONET/SDH
Sections only, and is transparent for all layers above that.
SONET/SDH Add-Drop multiplexers and Digital Cross Connect
Systems terminate SONET/SDH Lines. SONET/SDH Terminal
Multiplexers may also terminate SONET/SDH Paths and VTs/VCs.
MIB II [6], as extended by [12], accommodates these cases by
appropriate use of the MIB II system group, and the interfaces
group. The system group can name and describe the type of
managed resource. The interfaces group defines which SONET/SDH
layers apply, how these layers are configured and multiplexed.
This is achieved by proper representation of SONET/SDH Layers
by ifEntries as defined in [12], as follows:
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_____________________________
| | | | >
| | | | |
| VT 1 |..........|VT K| > K ifEntries
| | | | |
|_____________|__________|____| >
| | | | >
| | | | |
| Path 1 |......|Path L| > L ifEntries
| | | | |
|_______________|______|______| >
| | >
| | |
| Line | |
| | |
|_____________________________| |
| | |
| | |
| Section Layer | > 1 ifEntry
| | |
|_____________________________| |
| | |
| | |
| Physical Medium Layer | |
| | |
|_____________________________| >
Use of ifTable for a SONET/SDH port
The exact configuration and multiplexing of the layers is
maintained in the ifStackTable [12].
5.2. Use of ifTable for SONET/SDH Medium/Section/Line Layer
Only the ifGeneralInformationGroup needs to be supported.
ifTable Object Use for combined SONET/SDH
Medium/Section/Line Layer
======================================================================
ifIndex Interface index.
ifDescr SONET/SDH Medium/Section/Line
ifType sonet(39)
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ifSpeed Speed of line rate for SONET/SDH,
(e.g., 155520000 bps).
ifPhysAddress The value of the Circuit Identifier.
If no Circuit Identifier has been assigned
this object should have an octet string with
zero length.
ifAdminStatus Supports read-only access.
The desired administrative status of the interface.
ifOperStatus The value testing(3) is not used.
This object assumes the value down(2),
if the objects sonetSectionCurrentStatus
and sonetLineCurrentStatus have
any other value than sonetSectionNoDefect(1)
and sonetLineNoDefect(1), respectively.
ifLastChange sysUpTime at the last change in ifOperStatus.
ifName Textual name of the interface or an OCTET STRING
of zero length.
ifLinkUpDownTrapEnable Set to enabled(1).
Supports read-only access.
ifHighSpeed Speed of line in Mega-bits per second
(e.g., 155 Mbps)
ifConnectorPresent Set to true(1).
ifAlias The (non-volatile) alias name for this interface
as assigned by the network manager.
5.3. Use of ifTable for SONET/SDH Paths
Only the ifGeneralInformationGroup needs to be supported.
ifTable Object Use for SONET/SDH Paths
=========================================
ifIndex Interface index.
ifDescr SONET/SDH Path
ifType sonetPath(50)
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ifSpeed set to speed of SONET/SDH path
(e.g., an STS-1 path has a
rate of 50112000 bps.)
ifPhysAddress Circuit Identifier or OCTET STRING of zero length.
ifAdminStatus Supports read-only access.
The desired administrative status of the interface.
ifOperStatus This object assumes the value down(2),
if the object sonetPathCurrentStatus has
any other value than sonetPathNoDefect(1).
ifLastChange sysUpTime at the last change in ifOperStatus.
ifName Textual name of the interface or an OCTET STRING
of zero length.
ifLinkUpDownTrapEnable Default value is disabled(2).
Just read-only access may be supported.
ifHighSpeed Set to rate of SONET/SDH path
in Mega-bits per second.
ifConnectorPresent Set to false(2).
ifAlias The (non-volatile) alias name for this interface
as assigned by the network manager.
5.4. Use of ifTable for SONET/SDH VTs/VCs
Only the ifGeneralInformationGroup needs to be supported.
ifTable Object Use for SONET/SDH VTs/VCs
===========================================
ifIndex Interface index.
ifDescr SONET/SDH VT/VC
ifType sonetVT(51)
ifSpeed Set to speed of VT/VC
(e.g., a VT1.5 has a rate of
1728000 bps.)
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ifPhysAddress Circuit Identifier or OCTET STRING of zero length.
ifAdminStatus Supports read-only access.
The desired administrative status of the interface.
ifOperStatus This object assumes the value down(2),
if the object sonetVTCurrentStatus has
any other value than sonetVTNoDefect(1).
ifLastChange sysUpTime at the last change in ifOperStatus.
ifName Textual name of the interface or an OCTET STRING
of zero length.
ifLinkUpDownTrapEnable Default value is disabled(2).
Just read-only access may be supported.
ifHighSpeed Set to rate of VT in Mega-bits per second.
ifConnectorPresent Set to false(2).
ifAlias The (non-volatile) alias name for this interface
as assigned by the network manager.
5.5. SONET/SDH Terminology
The terminology used in this document to describe error
conditions on a SONET circuit as monitored by a SONET system
are from the T1.231 [20]. The terminology used in this
document to describe error conditions on a SDH circuit as
monitored by a SDH system are from the CCITT G.783 [18]. Only
the SONET Performance Monitoring terminology is defined in
this document. The definitions for SDH Performance Monitoring
terms are similar but not identical, and they can be found in
[18]. If the definition in this document does not match the
definition in the T1.231 document, the implementer should
follow the definition described in this document. In some
cases other or additional references are used as compared with
the ones cited above. This will be indicated in the text.
Section Loss Of Frame Failure (Out of Frame Event, Severely
Errored Frame Defect)
An Out of Frame (OOF) event (or Severely Errored Frame
defect) is the occurrence of four contiguous errored
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frame alignment words. A frame alignment work occupies
the A1 and A2 bytes of an STS frame, and is defined in
T1.105. The SEF defect is terminated when two contiguous
error-free frame words are detected. Any implementation
of the frame recovery circuitry which achieves
realignment following an OOF within the 250 microsecond
(two frames) interval implied by this definition is
acceptable.
An Loss of Frame (LOF) defect is declared when an OOF/SEF
defect persists for a period of 3 milliseconds. The LOF
defect is terminated when the incoming signal remains
continuously in-frame for a period of 1 ms to 3 ms.
An LOF failure is declared when the LOF defect persists
for a period of 2.5 +/- 0.5 seconds, except when an LOS
defect or failure is present. The LOF failure is cleared
when the LOS failure is declared, or when the LOF defect
is absent for 10 +/- 0.5 seconds.
Loss of Signal
The Loss of Signal (LOS) defect is declared when no
transitions are detected on the incoming signal (before
descrambling). The LOS defect is detected upon
observing 2.3 to 100 microseconds of no transitions. The
LOS defect is cleared after a 125 microsecond interval
(one frame) during which no LOS defect is detected.
The LOS failure is declared when the LOS defect persists
for a period of 2.5 +/- 0.5 seconds, or if LOS defect is
present when the criteria for LOF failure declaration
have been met. The LOS failure is cleared when the LOS
defect is absent for a period of 10 +/- 0.5 seconds.
Declaration of LOS failure clears any existing LOF
failure. Clearing the LOS failure allows immediate
declaration of the LOF failure if conditions warrant.
STS-Path Loss of Pointer
An Loss of Pointer (LOP) defect is declared when either a
valid pointer is not detected in eight consecutive
frames, or when eight consecutive frames are detected
with the New Data Flag (NDF) set to "1001" without a
valid concatenation indicator (see ANSI T1.105). A LOP
defect is terminated when either a valid pointer with a
normal NDF set to "0110", or a valid concatenation
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indicator is detected for three contiguous frames.
Incoming STS-Path AIS shall not result in the declaration
of a LOP defect.
A STS-Path LOP failure is declared when the STS-Path LOP
defect persists for a period of 2.5 +/- 0.5 seconds. A
STS-Path LOP failure is cleared when the STS-Path LOP
defect is absent for 10 +/- 0.5 seconds.
VT Loss of Pointer
A VT LOP defect is declared when either a valid pointer
is not detected in eight consecutive VT superframes, or
when eight consecutive VT superframes are detected with
the NDF set to "1001" without a valid concatenation
indicator. A VT LOP defect is terminated when either a
valid pointer with a normal NDF set to "0110", or a valid
concatenation indicator is detected for three contiguous
VT superframes. Incoming VT-Path AIS shall not result in
declaring a VT LOP defect.
A VT LOP failure is declared when the VT LOP defect
persists for 2.5 +/- 0.5 seconds. A VT LOP failure is
cleared when the VT LOP defect is absent for 10 +/- 0.5
seconds.
Line Alarm Indication Signal
A Line Alarm Indication Signal (L-AIS) is defined in ANSI
T1.105. The following criteria are specific to the L-AIS
defect:
-- Line AIS defect is detected as a "111" pattern in
bits 6, 7, and 8 of the K2 byte in five consecutive
frames.
-- Line AIS defect is terminated when bits 6, 7, and 8
of the K2 byte do not contain the code "111" for five
consecutive frames.
A Line AIS failure is declared when the Line AIS defect
persists for a period of 20.5 +/- 0.5 seconds. A Line
AIS failure is cleared when the Line AIS defect is absent
for 10 +/- 0.5 seconds.
STS-Path Alarm Indication Signal
The STS-Path Alarm Indication Signal (AIS) is defined in
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ANSI T1.105 as all ones in bytes H1, H2, and H3 as well
as all ones in the entire STS SPE. The following
criteria are specific to the STS-Path AIS defect:
-- STS-Path AIS defect is detected as all ones in bytes
H1 and H2 in three contiguous frames.
-- The STS-Path AIS defect is terminated when a valid STS
Pointer is detected with the NDF set to "1001" (inverted)
for one frame, or "0110" (normal) for three contiguous
frames.
A STS-Path AIS failure is declared when the STS-Path AIS
defect persists for 2.5 +/- 0.5 seconds. A STS-Path AIS
failure is cleared when the STS-Path AIS defect is absent
for 10 +/- 0.5 seconds.
VT-Path Alarm Indication Signal
The VT-Path Alarm Indication Signal (AIS) is only
applicable for VTs in the floating mode of operation.
VT-Path AIS is used to alert the downstream VT Path
Terminating Entity (PTE) of an upstream failure. Upon
detection of a failure, Line AIS, or STS-Path AIS, an STS
PTE will generate downstream VT-Path AIS if the STS
Synchronous Payload Envelope (SPE) is carrying floating
VTs. VT-Path AIS is specified in ANSI T1.105 as all ones
in bytes V1, V2, V3, and V4, as well as all ones in the
entire VT SPE. The following criteria are specific to
VT-Path AIS defect:
-- VT-Path AIS defect is detected by a VT PTE as all
ones in bytes V1 and V2 in three contiguous VT
superframes.
-- VT-Path AIS defect is terminated when valid VT
pointer with a valid VT size is detected with the NDF set
to "1001" (inverted) for one VT superframe, or "0110"
(normal) for three contiguous VT superframes are
detected.
A VT-Path AIS failure is declared when the VT-Path AIS
defect persists for 2.5 +/- 0.5 seconds. A VT-Path AIS
failure is cleared when the VT-Path AIS defect is absent
for 10 +/- 0.5 seconds.
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Line Remote Defect Indication
Line Remote Defect Indication (RDI) (aka Line FERF)
signal is the occurrence of a "110" pattern in bit
positions 6, 7, and 8 of the K2 byte in STS-1 #1 of the
STS-N signal. Line RDI is defined in ANSI T1.105. The
following criteria are specific to Line RDI defect:
-- Line RDI defect is a "110" code in bits 6, 7, and 8
of the K2 byte of in STS-1 #1 in five consecutive frames.
-- Line RDI defect is terminated when any code other
than "110" is detected in bits 6, 7, and 8 of the K2 byte
in five consecutive frames.
A Line Remote Failure Indication (RFI) failure is
declared when the incoming Line RDI defects lasts for 2.5
+/- 0.5 seconds. The Line RFI failure is cleared when no
Line RDI defects are detected for 10 +/- 0.5 seconds.
STS-Path Remote Defect Indication
STS-Path RDI (aka STS-Path FERF) signal shall be
generated within 100 milliseconds by the STS PTE upon
detection of an AIS or LOP defect. Transmission of the
STS-Path RDI signal shall cease within 100 milliseconds
when the STS PTE no longer detects STS-Path AIS or STS-
Path LOP defect. The STS-Path RDI shall accurately
report the presence or absence of STS-Path AIS or STS-
Path LOP defects. STS-Path RDI defect is defined in ANSI
T1.105. The following requirements are specific to the
STS-Path RDI defect:
-- STS-Path RDI is detected by all STS PTEs. STS-Path
RDI is detected by the upstream STS PTE as a "1" in bit
five of the Path Status byte (G1) for five contiguous
frames.
-- Removal of STS-Path Remote Defect Indication is
detected by a "0" in bit 5 of the G1 byte in five
contiguous frames.
A STS-Path Remote Failure Indication (RFI) failure is
declared when the incoming STS-Path RDI defects lasts for
2.5 +/- 0.5 seconds. The STS-Path RFI failure is cleared
when no STS-Path RDI defects are detected for 10 +/- 0.5
seconds.
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VT-Path Remote Defect Indication
VT Path RDI (aka VT Path FERF) signal shall be generated
within 100 milliseconds by the VT PTE upon detection of a
VT-Path AIS or LOP defect. Transmission of the VT-Path
RDI signal shall cease within 100 milliseconds when the
VT PTE no longer detects VT-Path AIS or VT-Path LOP
defect. The VT-Path RDI shall accurately report the
presence or absence of VT-Path AIS or VT-Path LOP
defects. VT-Path RDI defect is defined in ANSI T1.105.
The following requirements are specific to VT-Path RDI
defect:
-- VT-Path RDI defect is the occurrence of a "1" in bit
4 of the VT-Path Overhead byte (V5) in five contiguous
frames.
-- VT-Path RDI defect is terminated when a "0" is
detected in bit 4 of the VT-Path Overhead byte (V5) for
five contiguous frames.
A VT-Path Remote Failure Indication (RFI) (derived)
failure is declared when the incoming VT-Path RDI defects
lasts for 2.5 +/- 0.5 seconds. The VT-Path RFI failure
is cleared when no VT-Path RDI defects are detected for
10 +/- 0.5 seconds.
VT-Path Remote Failure Indication
The VT-Path RFI signal is only required for the case of
byte synch mapped DS1s where the DS1 frame bit is not
mapped. The VT-Path RFI is specified in ANSI T1.105,
where it is currently called VT path yellow. When
provided, the VT-Path RFI signal is used to indicate the
occurrence of far-end failures. When the VT-Path RFI is
not provided, far-end failures are derived from local
timing of the VT-Path RDI defect. The VT-Path RFI
failure is declared within 5 ms of detecting the incoming
VT-Path RFI Signal. The VT-Path Remote Failure
Indication (RFI) failure is cleared within 50 ms of
detecting the removal of the incoming VT-Path RFI signal.
Coding Violation
Coding Violations (CV) are Bit Interleaved Parity (BIP)
errors that are detected in the incoming signal. CV
counters are incremented for each BIP error detected.
That is, each BIP-8 can detect up to eight errors per
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STS-N frame, with each error incrementing the CV counter.
Section CVs shall be collected using the BIP-8 in the B1
byte located in the Section Overhead of STS-1 #1. Line
CVs shall be collected using the BIP-8s in B2 bytes
located in the Line Overhead of each STS-1 (since all CVs
on an STS-N line are counted together, this is equivalent
to counting each error in the BIP-8*N contained in the B2
bytes of the STS-N Line Overhead). Thus, on an STS-N
signal, up to 8 x N CVs may occur in each frame. Path
CVs shall be collected using the BIP-8 in the B3 byte of
the STS-Path Overhead of the STS SPE. VT CVs shall be
collected using the BIP-2 in the V5 overhead byte of the
floating VT.
Errored Seconds
At each layer, an Errored Second (ES) is a second with
one or more Coding Violations at that layer OR one or
more incoming defects (e.g., SEF, LOS, AIS, LOP) at that
layer has occurred.
Severely Errored Seconds
According to [11, 20, 21, 23] at each layer, an Severely
Errored Second (SES) is a second with x or more CVs at
that layer, or a second during which at least one or more
incoming defects at that layer has occurred. The values
of x in RFC1595[19] were based on [11] and [21] (see
Appendix B). These values have subsequently been relaxed
in [20, 23]. In addition, according to G.826 [22] SESs
are measured as a percentage of errored blocks.
To deal with these sets of definitions this memo defines
an object sonetSESThresholdSet that determines the
correct interpretation of SES. For backward
compatibility, if this object is not implemented the
interpretation of Appendix B shall apply. Otherwise, a
more recent interpretation is suggested. An agent is not
required to support all sets of definitions.
Note that if a manager changes the value of this object
all SES statistics collected prior to this change shall
be invalidated.
Severely Errored Framing Seconds
A Severely Errored Framing Second (SEFS) is a seconds
with containing one or more SEF events. This counter is
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only counted at the Section Layer.
Unavailable Seconds
At the Line, Path, and VT layers, an unavailable second
is calculated by counting the number of seconds that the
interface is unavailable. At each layer, the SONET/SDH
interface is said to be unavailable at the onset of 10
contiguous SESs. The 10 SESs are included in unavailable
time. Once unavailable, the SONET/SDH interface becomes
available at the onset of 10 contiguous seconds with no
SESs. The 10 seconds with no SESs are excluded from
unavailable time. With respect to the SONET/SDH error
counts at each layer, all counters at that layer are
incremented while the SONET/SDH interface is deemed
available at that layer. While the interface is deemed
unavailable at that layer, the only count that is
incremented is UASs at that layer.
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, 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 reduce the CV count by the number of
violations counted since the onset of unavailable time.
The agent must be similarly prepared to retroactively
decrease the UAS count by 10 and increase the ES and CV
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 CV, ES, SES, SEFS, and UAS counts the
PREVIOUS interval must be adjusted. In this case
successive GETs of the affected sonetPathIntervalSES and
sonetPathIntervalUAS objects (and the analogous Line and
VT objects also) objects will return differing values if
the first GET occurs during the first few seconds of the
window.
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
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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
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 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 A. An
agent may choose to use this approach in lieu of
retroactive adjustments to the counters.
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.
Unequipped
If a Path or VT connection is not provisioned (idle) the
SONET equipment will signal this state by transmitting
the Path or VT Signal Label as follows:
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- byte C2 of the STS Path Overhead equal to 0 for an
unequipped Path,
- byte V5 of the VT Path Overhead equal to 0 for an
unequipped VT.
Signal Label Mismatch
A Path or VT connection is not correctly provisioned if a
received Path or VT Signal Label mismatch occurs. A
received Signal Label is considered mismatched if it does
not equal either the locally provisioned value or the
value 'equipped non-specific' (1 hex). Note that any
received non-zero Signal Label is considered a locally
provisioned value of 'equipped non-specific'. Only in-
service, provisioned Path Terminating equipment can
detect mismatched Signal labels. It is considered
provisioned if it has been configured for a mapping and
has been assigned signals to and from which the mapping
takes place. While a Path is unequipped or has
mismatched signal labels ES/SES counts continue, but
these conditions do not themselves contribute to ES/SES.
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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6. Object Definitions
SONET-MIB DEFINITIONS ::= BEGIN
IMPORTS
MODULE-IDENTITY, OBJECT-TYPE,
Integer32
FROM SNMPv2-SMI
DisplayString, TruthValue
FROM SNMPv2-TC
MODULE-COMPLIANCE, OBJECT-GROUP
FROM SNMPv2-CONF
ifIndex, transmission
FROM RFC1213-MIB
PerfCurrentCount, PerfIntervalCount
FROM PerfHist-TC-MIB;
-- This is the MIB module for the SONET/SDH Interface objects.
sonetMIB MODULE-IDENTITY
LAST-UPDATED "9608260000Z"
ORGANIZATION "IETF AToM MIB Working Group"
CONTACT-INFO
"Kaj Tesink
Bell Communications Research
Tel: (908) 758-5254
Fax: (908) 758-4196
E-mail: kaj@cc.bellcore.com."
DESCRIPTION
"The MIB module to describe
SONET/SDH interfaces objects."
::= { transmission 39 }
-- This is the MIB module for the SONET/SDH objects
sonetObjects OBJECT IDENTIFIER ::= { sonetMIB 1 }
sonetObjectsPath OBJECT IDENTIFIER ::= { sonetMIB 2 }
sonetObjectsVT OBJECT IDENTIFIER ::= { sonetMIB 3 }
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-- groups in the SONET/SDH MIB module
sonetMedium OBJECT IDENTIFIER ::= { sonetObjects 1 }
sonetSection OBJECT IDENTIFIER ::= { sonetObjects 2 }
sonetLine OBJECT IDENTIFIER ::= { sonetObjects 3 }
sonetFarEndLine OBJECT IDENTIFIER ::= { sonetObjects 4 }
sonetPath OBJECT IDENTIFIER ::= { sonetObjectsPath 1 }
sonetFarEndPath OBJECT IDENTIFIER ::= { sonetObjectsPath 2 }
sonetVT OBJECT IDENTIFIER ::= { sonetObjectsVT 1 }
sonetFarEndVT OBJECT IDENTIFIER ::= { sonetObjectsVT 2 }
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-- the SONET/SDH Medium group
-- SONET/SDH interfaces for some applications may be electrical
-- interfaces and not optical interfaces. This group handles
-- the configuration information for both optical SONET/SDH
-- interfaces
-- and electrical SONET/SDH interfaces.
sonetMediumTable OBJECT-TYPE
SYNTAX SEQUENCE OF SonetMediumEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The SONET/SDH Medium table."
::= { sonetMedium 1 }
sonetMediumEntry OBJECT-TYPE
SYNTAX SonetMediumEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry in the SONET/SDH Medium table."
INDEX { ifIndex }
::= { sonetMediumTable 1 }
SonetMediumEntry ::=
SEQUENCE {
sonetMediumType INTEGER,
sonetMediumTimeElapsed Integer32,
sonetMediumValidIntervals Integer32,
sonetMediumLineCoding INTEGER,
sonetMediumLineType INTEGER,
sonetMediumCircuitIdentifier DisplayString,
sonetMediumInvalidIntervals Integer32,
sonetMediumLoopbackConfig BITS
}
sonetMediumType OBJECT-TYPE
SYNTAX INTEGER {
sonet(1),
sdh(2)
}
MAX-ACCESS read-only
STATUS current
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DESCRIPTION
"This variable identifies whether a SONET
or a SDH signal is used across this interface."
::= { sonetMediumEntry 1 }
sonetMediumTimeElapsed OBJECT-TYPE
SYNTAX Integer32 (1..900)
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of seconds, including partial
seconds, that have elapsed since the beginning of
the current error-measurement period."
::= { sonetMediumEntry 2 }
sonetMediumValidIntervals OBJECT-TYPE
SYNTAX Integer32 (0..96)
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of previous intervals for which valid
data has been stored. A SONET interface must be
capable of supporting at least n intervals.
The minimum value of n is 4.
The default of n is 32.
The maximum value of n is 96.
The value of this object will be n unless
the device was brought online within the last
(nx15) minutes, in which case the value will be the
number of complete 15 minute intervals the device 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."
::= { sonetMediumEntry 3 }
sonetMediumLineCoding OBJECT-TYPE
SYNTAX INTEGER {
sonetMediumOther(1),
sonetMediumB3ZS(2),
sonetMediumCMI(3),
sonetMediumNRZ(4),
sonetMediumRZ(5)
}
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MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This variable describes the line coding for
this interface. The B3ZS and CMI are used for
electrical SONET/SDH signals (STS-1 and STS-3).
The Non-Return to Zero (NRZ) and the Return
to Zero are used for optical SONET/SDH signals."
::= { sonetMediumEntry 4 }
sonetMediumLineType OBJECT-TYPE
SYNTAX INTEGER {
sonetOther(1),
sonetShortSingleMode(2),
sonetLongSingleMode(3),
sonetMultiMode(4),
sonetCoax(5),
sonetUTP(6)
}
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This variable describes the line type for
this interface. The line types are
Short and Long Range
Single Mode fiber or Multi-Mode fiber interfaces,
and coax and UTP for electrical interfaces. The
value sonetOther should be used when the Line Type is
not one of the listed values."
::= { sonetMediumEntry 5 }
sonetMediumCircuitIdentifier OBJECT-TYPE
SYNTAX DisplayString (SIZE (0..255))
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"This variable contains the transmission
vendor's circuit identifier, for the
purpose of facilitating troubleshooting.
Note that the circuit identifier, if available,
is also represented by ifPhysAddress."
::= { sonetMediumEntry 6 }
sonetMediumInvalidIntervals OBJECT-TYPE
SYNTAX Integer32 (0..96)
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MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of intervals for which no valid
data is available. This includes intervals
of which valid data has been lost, e.g., due
to restart of the agent."
::= { sonetMediumEntry 7 }
sonetMediumLoopbackConfig OBJECT-TYPE
SYNTAX BITS {
sonetNoLoop(0),
sonetFacilityLoop(1),
sonetTerminalLoop(2),
sonetOtherLoop(3) }
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"The current loopback state of the SONET/SDH interface. The
values mean:
sonetNoLoop
Not in the loopback state. A device that is not
capable of performing a loopback on this interface
shall always return this value.
sonetFacilityLoop
The received signal at this interface is looped back
out through the corresponding transmitter in the return
direction.
sonetTerminalLoop
The signal that is about to be transmitted is connected
to the associated incoming receiver.
sonetOtherLoop
Loopbacks that are not defined here."
::= { sonetMediumEntry 8 }
sonetSESthresholdSet OBJECT-TYPE
SYNTAX INTEGER {
other(1),
bellcore1991(2),
ansi1993(3),
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itu1995(4)
}
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"An enumerated integer indicating which
recognized set of SES thresholds that
the agent uses for determining severely
errored seconds and unavailable time.
other(1)
None of the following.
bellcore1991(2)
Bellcore TR-NWT-000253, 1991 [21], or
ANSI T1M1.3/93-005R2, 1993 [11].
See also Appendix B.
ansi1993(3)
ANSI T1.231, 1993 [20], or
Bellcore GR-253-CORE, Issue 2, 1995 [23]
itu1995(4)
ITU Recommendation G.826, 1995 [22].
If a manager changes the value of this
object then the SES statistics collected
prior to this change must be invalidated."
::= { sonetMedium 2 }
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-- the SONET/SDH Section group
-- this group consists of 2 tables:
-- - the SONET/SDH Section Current Table
-- - the SONET/SDH Section Interval Table
-- the SONET/SDH Section Current Table
-- The SONET/SDH Section
-- current table contains various statistics
-- being collected for the current 15 minute interval.
sonetSectionCurrentTable OBJECT-TYPE
SYNTAX SEQUENCE OF SonetSectionCurrentEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The SONET/SDH Section Current table."
::= { sonetSection 1 }
sonetSectionCurrentEntry OBJECT-TYPE
SYNTAX SonetSectionCurrentEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry in the SONET/SDH Section Current table."
INDEX { ifIndex }
::= { sonetSectionCurrentTable 1 }
SonetSectionCurrentEntry ::=
SEQUENCE {
sonetSectionCurrentStatus Integer32,
sonetSectionCurrentESs PerfCurrentCount,
sonetSectionCurrentSESs PerfCurrentCount,
sonetSectionCurrentSEFSs PerfCurrentCount,
sonetSectionCurrentCVs PerfCurrentCount
}
sonetSectionCurrentStatus OBJECT-TYPE
SYNTAX Integer32 (1..6)
MAX-ACCESS read-only
STATUS current
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DESCRIPTION
"This variable indicates the
status of the interface.
The sonetSectionCurrentStatus
is a bit map represented
as a sum, therefore,
it can represent multiple defects
simultaneously.
The sonetSectionNoDefect should be
set if and only if
no other flag is set.
The various bit positions are:
1 sonetSectionNoDefect
2 sonetSectionLOS
4 sonetSectionLOF"
::= { sonetSectionCurrentEntry 1 }
sonetSectionCurrentESs OBJECT-TYPE
SYNTAX PerfCurrentCount
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The counter associated with the number of Errored
Seconds encountered by a SONET/SDH
Section in the current 15 minute interval."
::= { sonetSectionCurrentEntry 2 }
sonetSectionCurrentSESs OBJECT-TYPE
SYNTAX PerfCurrentCount
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The counter associated with the number of
Severely Errored Seconds
encountered by a SONET/SDH Section in the current 15
minute interval."
::= { sonetSectionCurrentEntry 3 }
sonetSectionCurrentSEFSs OBJECT-TYPE
SYNTAX PerfCurrentCount
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The counter associated with the number of
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Severely Errored Framing Seconds
encountered by a SONET/SDH Section in the current
15 minute interval."
::= { sonetSectionCurrentEntry 4 }
sonetSectionCurrentCVs OBJECT-TYPE
SYNTAX PerfCurrentCount
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The counter associated with the number of Coding
Violations encountered by a
SONET/SDH Section in the current 15 minute interval."
::= { sonetSectionCurrentEntry 5 }
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-- the SONET/SDH Section Interval Table
-- The SONET/SDH Section Interval Table
-- contains various statistics
-- collected by each system over a maximum
-- of the previous 24 hours of
-- operation. The past 24 hours may be broken into 96
-- completed 15 minute intervals.
-- A system is required to store at
-- least 4 completed 15 minute interval.
-- The default value is 32 intervals.
sonetSectionIntervalTable OBJECT-TYPE
SYNTAX SEQUENCE OF SonetSectionIntervalEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The SONET/SDH Section Interval table."
::= { sonetSection 2 }
sonetSectionIntervalEntry OBJECT-TYPE
SYNTAX SonetSectionIntervalEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry in the SONET/SDH Section Interval table."
INDEX { ifIndex,
sonetSectionIntervalNumber }
::= { sonetSectionIntervalTable 1 }
SonetSectionIntervalEntry ::=
SEQUENCE {
sonetSectionIntervalNumber Integer32,
sonetSectionIntervalESs PerfIntervalCount,
sonetSectionIntervalSESs PerfIntervalCount,
sonetSectionIntervalSEFSs PerfIntervalCount,
sonetSectionIntervalCVs PerfIntervalCount,
sonetSectionIntervalValidData TruthValue
}
sonetSectionIntervalNumber OBJECT-TYPE
SYNTAX Integer32 (1..96)
MAX-ACCESS not-accessible
STATUS current
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DESCRIPTION
"A number between 1 and 96, which identifies the
interval for which the set of statistics is available.
The interval identified by 1 is the most recently
completed 15 minute interval,
and the interval identified
by N is the interval immediately preceding the
one identified
by N-1."
::= { sonetSectionIntervalEntry 1 }
sonetSectionIntervalESs OBJECT-TYPE
SYNTAX PerfIntervalCount
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The counter associated with the number of
Errored Seconds encountered
by a SONET/SDH Section in a
particular 15-minute interval
in the past 24 hours."
::= { sonetSectionIntervalEntry 2 }
sonetSectionIntervalSESs OBJECT-TYPE
SYNTAX PerfIntervalCount
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The counter associated with the number of
Severely Errored Seconds
encountered by a SONET/SDH Section in a
particular 15-minute interval
in the past 24 hours."
::= { sonetSectionIntervalEntry 3 }
sonetSectionIntervalSEFSs OBJECT-TYPE
SYNTAX PerfIntervalCount
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The counter associated with the number of
Severely Errored Framing Seconds
encountered by a SONET/SDH Section in a
particular 15-minute interval
in the past 24 hours."
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::= { sonetSectionIntervalEntry 4 }
sonetSectionIntervalCVs OBJECT-TYPE
SYNTAX PerfIntervalCount
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The counter associated with the number of Coding
Violations encountered by a
SONET/SDH Section in a particular 15-minute interval
in the past 24 hours."
::= { sonetSectionIntervalEntry 5 }
sonetSectionIntervalValidData OBJECT-TYPE
SYNTAX TruthValue
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This variable indicates if there is valid data for
this interval."
::= { sonetSectionIntervalEntry 6 }
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-- the SONET/SDH Line group
-- this group consists of 2 tables:
-- - the SONET/SDH Line Current Table
-- - the SONET/SDH Line Interval Table
-- the SONET/SDH Line Current Table
-- The SONET/SDH Line
-- current table contains various statistics
-- being collected for the current 15 minute interval.
sonetLineCurrentTable OBJECT-TYPE
SYNTAX SEQUENCE OF SonetLineCurrentEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The SONET/SDH Line Current table."
::= { sonetLine 1 }
sonetLineCurrentEntry OBJECT-TYPE
SYNTAX SonetLineCurrentEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry in the SONET/SDH Line Current table."
INDEX { ifIndex }
::= { sonetLineCurrentTable 1 }
SonetLineCurrentEntry ::=
SEQUENCE {
sonetLineCurrentStatus Integer32,
sonetLineCurrentESs PerfCurrentCount,
sonetLineCurrentSESs PerfCurrentCount,
sonetLineCurrentCVs PerfCurrentCount,
sonetLineCurrentUASs PerfCurrentCount
}
sonetLineCurrentStatus OBJECT-TYPE
SYNTAX Integer32 (1..6)
MAX-ACCESS read-only
STATUS current
DESCRIPTION
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"This variable indicates the
status of the interface.
The sonetLineCurrentStatus
is a bit map represented
as a sum, therefore,
it can represent multiple defects
simultaneously.
The sonetLineNoDefect should be
set if and only if
no other flag is set.
The various bit positions are:
1 sonetLineNoDefect
2 sonetLineAIS
4 sonetLineRDI"
::= { sonetLineCurrentEntry 1 }
sonetLineCurrentESs OBJECT-TYPE
SYNTAX PerfCurrentCount
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The counter associated with the number of Errored
Seconds encountered by a SONET/SDH
Line in the current 15 minute interval."
::= { sonetLineCurrentEntry 2 }
sonetLineCurrentSESs OBJECT-TYPE
SYNTAX PerfCurrentCount
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The counter associated with the number of
Severely Errored Seconds
encountered by a SONET/SDH Line in the current 15
minute
interval."
::= { sonetLineCurrentEntry 3 }
sonetLineCurrentCVs OBJECT-TYPE
SYNTAX PerfCurrentCount
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The counter associated with the number of Coding
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Violations encountered by a
SONET/SDH Line in the current 15 minute interval."
::= { sonetLineCurrentEntry 4 }
sonetLineCurrentUASs OBJECT-TYPE
SYNTAX PerfCurrentCount
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The counter associated with the number of
Unavailable Seconds
encountered by a SONET/SDH Line in the current 15
minute
interval."
::= { sonetLineCurrentEntry 5 }
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-- the SONET/SDH Line Interval Table
-- The SONET/SDH Line Interval Table
-- contains various statistics
-- collected by each system over a maximum
-- of the previous 24 hours of
-- operation. The past 24 hours may be broken into 96
-- completed 15 minute intervals.
-- A system is required to store at
-- least 4 completed 15 minute interval.
-- The default value is 32 intervals.
sonetLineIntervalTable OBJECT-TYPE
SYNTAX SEQUENCE OF SonetLineIntervalEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The SONET/SDH Line Interval table."
::= { sonetLine 2 }
sonetLineIntervalEntry OBJECT-TYPE
SYNTAX SonetLineIntervalEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry in the SONET/SDH Line Interval table."
INDEX { ifIndex,
sonetLineIntervalNumber }
::= { sonetLineIntervalTable 1 }
SonetLineIntervalEntry ::=
SEQUENCE {
sonetLineIntervalNumber Integer32,
sonetLineIntervalESs PerfIntervalCount,
sonetLineIntervalSESs PerfIntervalCount,
sonetLineIntervalCVs PerfIntervalCount,
sonetLineIntervalUASs PerfIntervalCount,
sonetLineIntervalValidData TruthValue
}
sonetLineIntervalNumber OBJECT-TYPE
SYNTAX Integer32 (1..96)
MAX-ACCESS not-accessible
STATUS current
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DESCRIPTION
"A number between 1 and 96, which identifies the
interval for which the set of statistics is available.
The interval identified by 1 is the most recently
completed 15 minute interval,
and the interval identified
by N is the interval immediately preceding the
one identified
by N-1."
::= { sonetLineIntervalEntry 1 }
sonetLineIntervalESs OBJECT-TYPE
SYNTAX PerfIntervalCount
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The counter associated with the number of
Errored Seconds encountered
by a SONET/SDH Line in a
particular 15-minute interval
in the past 24 hours."
::= { sonetLineIntervalEntry 2 }
sonetLineIntervalSESs OBJECT-TYPE
SYNTAX PerfIntervalCount
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The counter associated with the number of
Severely Errored Seconds
encountered by a SONET/SDH Line in a
particular 15-minute interval
in the past 24 hours."
::= { sonetLineIntervalEntry 3 }
sonetLineIntervalCVs OBJECT-TYPE
SYNTAX PerfIntervalCount
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The counter associated with the number of Coding
Violations encountered by a
SONET/SDH Line in a
particular 15-minute interval
in the past 24 hours."
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::= { sonetLineIntervalEntry 4 }
sonetLineIntervalUASs OBJECT-TYPE
SYNTAX PerfIntervalCount
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The counter associated with the
number of Unavailable Seconds
encountered by a SONET/SDH Line in
a particular 15-minute interval
in the past 24 hours."
::= { sonetLineIntervalEntry 5 }
sonetLineIntervalValidData OBJECT-TYPE
SYNTAX TruthValue
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This variable indicates if there is valid data for
this interval."
::= { sonetLineIntervalEntry 6 }
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-- The SONET/SDH Far End Line group.
-- This group may only be implemented by SONET/SDH (LTEs)
-- systems that provide for a far end block error (FEBE)
-- information at the SONET/SDH Line Layer.
-- This group consists of two tables:
-- SONET/SDH Far End Line Current Table
-- SONET/SDH Far End Line Interval Table
-- The SONET/SDH Far End Line Current Table
-- The SONET/SDH Far End Line Current table contains
-- various statistics being
-- collected for the current 15 minute interval.
-- The statistics are collected from the far end
-- block error code (FEBE)
-- within the third Z2 byte of the Line Overhead
-- in Broadband ISDN applications.
-- The definitions are the same as described for
-- the near-end information.
sonetFarEndLineCurrentTable OBJECT-TYPE
SYNTAX SEQUENCE OF SonetFarEndLineCurrentEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The SONET/SDH Far End Line Current table."
::= { sonetFarEndLine 1 }
sonetFarEndLineCurrentEntry OBJECT-TYPE
SYNTAX SonetFarEndLineCurrentEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry in the SONET/SDH Far End Line Current table."
INDEX { ifIndex }
::= { sonetFarEndLineCurrentTable 1 }
SonetFarEndLineCurrentEntry ::=
SEQUENCE {
sonetFarEndLineCurrentESs PerfCurrentCount,
sonetFarEndLineCurrentSESs PerfCurrentCount,
sonetFarEndLineCurrentCVs PerfCurrentCount,
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sonetFarEndLineCurrentUASs PerfCurrentCount
}
sonetFarEndLineCurrentESs OBJECT-TYPE
SYNTAX PerfCurrentCount
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The counter associated with the number of Far
End Errored Seconds encountered by a SONET/SDH
interface in the current 15 minute interval."
::= { sonetFarEndLineCurrentEntry 1 }
sonetFarEndLineCurrentSESs OBJECT-TYPE
SYNTAX PerfCurrentCount
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The counter associated with the number of
Far End Severely Errored Seconds
encountered by a SONET/SDH Medium/Section/Line
interface in the current 15 minute
interval."
::= { sonetFarEndLineCurrentEntry 2 }
sonetFarEndLineCurrentCVs OBJECT-TYPE
SYNTAX PerfCurrentCount
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The counter associated with the number of
Far End Coding Violations reported via
the far end block error count
encountered by a
SONET/SDH Medium/Section/Line
interface in the current 15 minute interval."
::= { sonetFarEndLineCurrentEntry 3 }
sonetFarEndLineCurrentUASs OBJECT-TYPE
SYNTAX PerfCurrentCount
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The counter associated with the number of
Far End Unavailable Seconds
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encountered by a
SONET/SDH Medium/Section/Line
interface in the current 15 minute interval."
::= { sonetFarEndLineCurrentEntry 4 }
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-- The SONET/SDH Far End Line Interval Table
-- The SONET/SDH Far End Line Interval Table
-- contains various statistics
-- collected by each system over a maximum
-- of the previous 24 hours of
-- operation. The past 24 hours may be broken into 96
-- completed 15 minute intervals.
-- A system is required to store at
-- least 4 completed 15 minute interval.
-- The default value is 32 intervals.
sonetFarEndLineIntervalTable OBJECT-TYPE
SYNTAX SEQUENCE OF SonetFarEndLineIntervalEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The SONET/SDH Far End Line Interval table."
::= { sonetFarEndLine 2 }
sonetFarEndLineIntervalEntry OBJECT-TYPE
SYNTAX SonetFarEndLineIntervalEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry in the SONET/SDH Far
End Line Interval table."
INDEX { ifIndex,
sonetFarEndLineIntervalNumber }
::= { sonetFarEndLineIntervalTable 1 }
SonetFarEndLineIntervalEntry ::=
SEQUENCE {
sonetFarEndLineIntervalNumber Integer32,
sonetFarEndLineIntervalESs PerfIntervalCount,
sonetFarEndLineIntervalSESs PerfIntervalCount,
sonetFarEndLineIntervalCVs PerfIntervalCount,
sonetFarEndLineIntervalUASs PerfIntervalCount,
sonetFarEndLineIntervalValidData TruthValue
}
sonetFarEndLineIntervalNumber OBJECT-TYPE
SYNTAX Integer32 (1..96)
MAX-ACCESS not-accessible
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STATUS current
DESCRIPTION
"A number between 1 and 96, which identifies the
interval for which the set of statistics is available.
The interval identified by 1 is the most recently
completed 15 minute interval,
and the interval identified
by N is the interval immediately preceding the
one identified
by N-1."
::= { sonetFarEndLineIntervalEntry 1 }
sonetFarEndLineIntervalESs OBJECT-TYPE
SYNTAX PerfIntervalCount
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The counter associated with the number of
Far End Errored Seconds encountered
by a SONET/SDH Line
interface in a particular 15-minute interval
in the past 24 hours."
::= { sonetFarEndLineIntervalEntry 2 }
sonetFarEndLineIntervalSESs OBJECT-TYPE
SYNTAX PerfIntervalCount
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The counter associated with the number of
Far End Severely Errored Seconds
encountered by a SONET/SDH Line
interface in a particular 15-minute interval
in the past 24 hours."
::= { sonetFarEndLineIntervalEntry 3 }
sonetFarEndLineIntervalCVs OBJECT-TYPE
SYNTAX PerfIntervalCount
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The counter associated with the number of
Far End Coding Violations reported via
the far end block error count
encountered by a
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SONET/SDH Line
interface in a particular 15-minute interval
in the past 24 hours."
::= { sonetFarEndLineIntervalEntry 4 }
sonetFarEndLineIntervalUASs OBJECT-TYPE
SYNTAX PerfIntervalCount
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The counter associated with the number of
Far End Unavailable Seconds
encountered by a
SONET/SDH Line
interface in a particular 15-minute interval
in the past 24 hours."
::= { sonetFarEndLineIntervalEntry 5 }
sonetFarEndLineIntervalValidData OBJECT-TYPE
SYNTAX TruthValue
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This variable indicates if there is valid data for
this interval."
::= { sonetFarEndLineIntervalEntry 6 }
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-- the SONET/SDH Path group
-- this group consists of 2 tables:
-- - the SONET/SDH Path Current Table
-- - the SONET/SDH Path Interval Table
-- the SONET/SDH Path Current Table
-- The SONET/SDH Path
-- current table contains various statistics
-- being collected for the current 15 minute interval.
sonetPathCurrentTable OBJECT-TYPE
SYNTAX SEQUENCE OF SonetPathCurrentEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The SONET/SDH Path Current table."
::= { sonetPath 1 }
sonetPathCurrentEntry OBJECT-TYPE
SYNTAX SonetPathCurrentEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry in the SONET/SDH Path Current table."
INDEX { ifIndex }
::= { sonetPathCurrentTable 1 }
SonetPathCurrentEntry ::=
SEQUENCE {
sonetPathCurrentWidth INTEGER,
sonetPathCurrentStatus Integer32,
sonetPathCurrentESs PerfCurrentCount,
sonetPathCurrentSESs PerfCurrentCount,
sonetPathCurrentCVs PerfCurrentCount,
sonetPathCurrentUASs PerfCurrentCount
}
sonetPathCurrentWidth OBJECT-TYPE
SYNTAX INTEGER {
sts1(1),
sts3cSTM1(2),
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sts12cSTM4(3),
sts24c(4),
sts48cSTM16(5)
}
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"A value that indicates the type of the SONET/SDH
Path. For SONET, the assigned types are
the STS-Nc SPEs, where N = 1, 3, 12, 24, and 48.
STS-1 is equal to 51.84 Mbps. For SDH, the assigned
types are the STM-Nc VCs, where N = 1, 4, and 16."
::= { sonetPathCurrentEntry 1 }
sonetPathCurrentStatus OBJECT-TYPE
SYNTAX Integer32 (1..62)
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This variable indicates the
status of the interface.
The sonetPathCurrentStatus
is a bit map represented
as a sum, therefore,
it can represent multiple defects
simultaneously.
The sonetPathNoDefect should be
set if and only if
no other flag is set.
The various bit positions are:
1 sonetPathNoDefect
2 sonetPathSTSLOP
4 sonetPathSTSAIS
8 sonetPathSTSRDI
16 sonetPathUnequipped
32 sonetPathSignalLabelMismatch"
::= { sonetPathCurrentEntry 2 }
sonetPathCurrentESs OBJECT-TYPE
SYNTAX PerfCurrentCount
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The counter associated with the number of Errored
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Seconds encountered by a SONET/SDH
Path in the current 15 minute interval."
::= { sonetPathCurrentEntry 3 }
sonetPathCurrentSESs OBJECT-TYPE
SYNTAX PerfCurrentCount
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The counter associated with the number of
Severely Errored Seconds
encountered by a SONET/SDH Path in the current 15
minute
interval."
::= { sonetPathCurrentEntry 4 }
sonetPathCurrentCVs OBJECT-TYPE
SYNTAX PerfCurrentCount
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The counter associated with the number of Coding
Violations encountered by a
SONET/SDH Path in the current 15 minute interval."
::= { sonetPathCurrentEntry 5 }
sonetPathCurrentUASs OBJECT-TYPE
SYNTAX PerfCurrentCount
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The counter associated with the number of
Unavailable Seconds
encountered by a Path in the current
15 minute interval."
::= { sonetPathCurrentEntry 6 }
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-- the SONET/SDH Path Interval Table
-- The SONET/SDH Path Interval Table
-- contains various statistics
-- collected by each system over a maximum
-- of the previous 24 hours of
-- operation. The past 24 hours may be broken into 96
-- completed 15 minute intervals.
-- A system is required to store at
-- least 4 completed 15 minute interval.
-- The default value is 32 intervals.
sonetPathIntervalTable OBJECT-TYPE
SYNTAX SEQUENCE OF SonetPathIntervalEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The SONET/SDH Path Interval table."
::= { sonetPath 2 }
sonetPathIntervalEntry OBJECT-TYPE
SYNTAX SonetPathIntervalEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry in the SONET/SDH Path Interval table."
INDEX { ifIndex,
sonetPathIntervalNumber }
::= { sonetPathIntervalTable 1 }
SonetPathIntervalEntry ::=
SEQUENCE {
sonetPathIntervalNumber Integer32,
sonetPathIntervalESs PerfIntervalCount,
sonetPathIntervalSESs PerfIntervalCount,
sonetPathIntervalCVs PerfIntervalCount,
sonetPathIntervalUASs PerfIntervalCount,
sonetPathIntervalValidData TruthValue
}
sonetPathIntervalNumber OBJECT-TYPE
SYNTAX Integer32 (1..96)
MAX-ACCESS not-accessible
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STATUS current
DESCRIPTION
"A number between 1 and 96, which identifies the
interval for which the set of statistics is available.
The interval identified by 1 is the most recently
completed 15 minute interval,
and the interval identified
by N is the interval immediately preceding the
one identified
by N-1."
::= { sonetPathIntervalEntry 1 }
sonetPathIntervalESs OBJECT-TYPE
SYNTAX PerfIntervalCount
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The counter associated with the number of
Errored Seconds encountered
by a SONET/SDH Path in a
particular 15-minute interval
in the past 24 hours."
::= { sonetPathIntervalEntry 2 }
sonetPathIntervalSESs OBJECT-TYPE
SYNTAX PerfIntervalCount
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The counter associated with the number of
Severely Errored Seconds
encountered by a SONET/SDH Path in
a particular 15-minute interval
in the past 24 hours."
::= { sonetPathIntervalEntry 3 }
sonetPathIntervalCVs OBJECT-TYPE
SYNTAX PerfIntervalCount
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The counter associated with the number of Coding
Violations encountered by a
SONET/SDH Path in a particular 15-minute interval
in the past 24 hours."
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::= { sonetPathIntervalEntry 4 }
sonetPathIntervalUASs OBJECT-TYPE
SYNTAX PerfIntervalCount
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The counter associated with the number of
Unavailable Seconds
encountered by a Path in a
particular 15-minute interval
in the past 24 hours."
::= { sonetPathIntervalEntry 5 }
sonetPathIntervalValidData OBJECT-TYPE
SYNTAX TruthValue
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This variable indicates if there is valid data for
this interval."
::= { sonetPathIntervalEntry 6 }
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-- The SONET/SDH Far End Path group
-- This group consists of two tables:
-- - SONET/SDH Far End Path Current Table
-- - SONET/SDH Far End Path Interval Table
-- The SONET/SDH Far End Path Current Table
-- The SONET/SDH Far End Path Current table
-- contains various statistics
-- being collected for the current 15 minute interval.
-- The statistics are collected from
-- the far end block error code
-- (FEBE) within the G1 byte of the Path Overhead.
-- The definitions are the same as described for
-- the near-end information.
sonetFarEndPathCurrentTable OBJECT-TYPE
SYNTAX SEQUENCE OF SonetFarEndPathCurrentEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The SONET/SDH Far End Path Current table."
::= { sonetFarEndPath 1 }
sonetFarEndPathCurrentEntry OBJECT-TYPE
SYNTAX SonetFarEndPathCurrentEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry in the SONET/SDH Far End Path Current table."
INDEX { ifIndex }
::= { sonetFarEndPathCurrentTable 1 }
SonetFarEndPathCurrentEntry ::=
SEQUENCE {
sonetFarEndPathCurrentESs PerfCurrentCount,
sonetFarEndPathCurrentSESs PerfCurrentCount,
sonetFarEndPathCurrentCVs PerfCurrentCount,
sonetFarEndPathCurrentUASs PerfCurrentCount
}
sonetFarEndPathCurrentESs OBJECT-TYPE
SYNTAX PerfCurrentCount
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MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The counter associated with the number of Far
End Errored Seconds encountered by a SONET/SDH
interface in the current 15 minute interval."
::= { sonetFarEndPathCurrentEntry 1 }
sonetFarEndPathCurrentSESs OBJECT-TYPE
SYNTAX PerfCurrentCount
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The counter associated with the number of
Far End Severely Errored Seconds
encountered by a SONET/SDH Path
interface in the current 15 minute
interval."
::= { sonetFarEndPathCurrentEntry 2 }
sonetFarEndPathCurrentCVs OBJECT-TYPE
SYNTAX PerfCurrentCount
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The counter associated with the number of
Far End Coding Violations reported via
the far end block error count
encountered by a
SONET/SDH Path interface in
the current 15 minute interval."
::= { sonetFarEndPathCurrentEntry 3 }
sonetFarEndPathCurrentUASs OBJECT-TYPE
SYNTAX PerfCurrentCount
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The counter associated with the number of
Far End Unavailable Seconds
encountered by a
SONET/SDH Path interface in
the current 15 minute interval."
::= { sonetFarEndPathCurrentEntry 4 }
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-- The SONET/SDH Far End Path Interval Table
-- The SONET/SDH Far End Path Interval Table
-- contains various statistics
-- collected by each system over a maximum
-- of the previous 24 hours of
-- operation. The past 24 hours may be broken into 96
-- completed 15 minute intervals.
-- A system is required to store at
-- least 4 completed 15 minute interval.
-- The default value is 32 intervals.
sonetFarEndPathIntervalTable OBJECT-TYPE
SYNTAX SEQUENCE OF SonetFarEndPathIntervalEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The SONET/SDH Far End Path Interval table."
::= { sonetFarEndPath 2 }
sonetFarEndPathIntervalEntry OBJECT-TYPE
SYNTAX SonetFarEndPathIntervalEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry in the SONET/SDH Far
End Path Interval table."
INDEX { ifIndex,
sonetFarEndPathIntervalNumber }
::= { sonetFarEndPathIntervalTable 1 }
SonetFarEndPathIntervalEntry ::=
SEQUENCE {
sonetFarEndPathIntervalNumber Integer32,
sonetFarEndPathIntervalESs PerfIntervalCount,
sonetFarEndPathIntervalSESs PerfIntervalCount,
sonetFarEndPathIntervalCVs PerfIntervalCount,
sonetFarEndPathIntervalUASs PerfIntervalCount,
sonetFarEndPathIntervalValidData TruthValue
}
sonetFarEndPathIntervalNumber OBJECT-TYPE
SYNTAX Integer32 (1..96)
MAX-ACCESS not-accessible
STATUS current
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DESCRIPTION
"A number between 1 and 96, which identifies the
interval for which the set of statistics is available.
The interval identified by 1 is the most recently
completed 15 minute interval,
and the interval identified
by N is the interval immediately preceding the
one identified
by N-1."
::= { sonetFarEndPathIntervalEntry 1 }
sonetFarEndPathIntervalESs OBJECT-TYPE
SYNTAX PerfIntervalCount
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The counter associated with the number of
Far End Errored Seconds encountered
by a SONET/SDH Path interface in a
particular 15-minute interval
in the past 24 hours."
::= { sonetFarEndPathIntervalEntry 2 }
sonetFarEndPathIntervalSESs OBJECT-TYPE
SYNTAX PerfIntervalCount
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The counter associated with the number of
Far End Severely Errored Seconds
encountered by a SONET/SDH Path interface
in a particular 15-minute interval
in the past 24 hours."
::= { sonetFarEndPathIntervalEntry 3 }
sonetFarEndPathIntervalCVs OBJECT-TYPE
SYNTAX PerfIntervalCount
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The counter associated with the number of
Far End Coding Violations reported via
the far end block error count
encountered by a
SONET/SDH Path interface
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in a particular 15-minute interval
in the past 24 hours."
::= { sonetFarEndPathIntervalEntry 4 }
sonetFarEndPathIntervalUASs OBJECT-TYPE
SYNTAX PerfIntervalCount
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The counter associated with the number of
Far End Unavailable Seconds
encountered by a
SONET/SDH Path interface in
a particular 15-minute interval
in the past 24 hours."
::= { sonetFarEndPathIntervalEntry 5 }
sonetFarEndPathIntervalValidData OBJECT-TYPE
SYNTAX TruthValue
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This variable indicates if there is valid data for
this interval."
::= { sonetFarEndPathIntervalEntry 6 }
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-- the SONET/SDH Virtual Tributary group
-- this group consists of 2 tables:
-- - the SONET/SDH VT Current Table
-- - the SONET/SDH VT Interval Table
-- For SDH signals, virtual tributaries are
-- called VCs instead of VTs
-- A VT1.5 = VC11
-- A VT2 = VC12
-- A VT3 = none
-- A VT6 = VC3
-- the SONET/SDH VT Current Table
-- The SONET/SDH VT current table
-- contains various statistics
-- being collected for the
-- current 15 minute interval.
sonetVTCurrentTable OBJECT-TYPE
SYNTAX SEQUENCE OF SonetVTCurrentEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The SONET/SDH VT Current table."
::= { sonetVT 1 }
sonetVTCurrentEntry OBJECT-TYPE
SYNTAX SonetVTCurrentEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry in the SONET/SDH VT Current table."
INDEX { ifIndex }
::= { sonetVTCurrentTable 1 }
SonetVTCurrentEntry ::=
SEQUENCE {
sonetVTCurrentWidth INTEGER,
sonetVTCurrentStatus Integer32,
sonetVTCurrentESs PerfCurrentCount,
sonetVTCurrentSESs PerfCurrentCount,
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sonetVTCurrentCVs PerfCurrentCount,
sonetVTCurrentUASs PerfCurrentCount
}
sonetVTCurrentWidth OBJECT-TYPE
SYNTAX INTEGER {
vtWidth15VC11(1),
vtWidth2VC12(2),
vtWidth3(3),
vtWidth6VC2(4),
vtWidth6c(5)
}
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"A value that indicates the type of the SONET
VT and SDH VC. Assigned widths are
VT1.5/VC11, VT2/VC12, VT3, VT6/VC2, and VT6c."
::= { sonetVTCurrentEntry 1 }
sonetVTCurrentStatus OBJECT-TYPE
SYNTAX Integer32 (1..126)
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This variable indicates the
status of the interface.
The sonetVTCurrentStatus
is a bit map represented
as a sum, therefore,
it can represent multiple defects
and failures
simultaneously.
The sonetVTNoDefect should be
set if and only if
no other flag is set.
The various bit positions are:
1 sonetVTNoDefect
2 sonetVTLOP
4 sonetVTPathAIS
8 sonetVTPathRDI
16 sonetVTPathRFI
32 sonetVTUnequipped
64 sonetVTSignalLabelMismatch"
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::= { sonetVTCurrentEntry 2 }
sonetVTCurrentESs OBJECT-TYPE
SYNTAX PerfCurrentCount
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The counter associated with the number of Errored
Seconds encountered by a SONET/SDH
VT in the current 15 minute interval."
::= { sonetVTCurrentEntry 3 }
sonetVTCurrentSESs OBJECT-TYPE
SYNTAX PerfCurrentCount
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The counter associated with the number of
Severely Errored Seconds
encountered by a SONET/SDH VT in the current 15 minute
interval."
::= { sonetVTCurrentEntry 4 }
sonetVTCurrentCVs OBJECT-TYPE
SYNTAX PerfCurrentCount
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The counter associated with the number of Coding
Violations encountered by a
SONET/SDH VT in the current 15 minute interval."
::= { sonetVTCurrentEntry 5 }
sonetVTCurrentUASs OBJECT-TYPE
SYNTAX PerfCurrentCount
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The counter associated with the number of
Unavailable Seconds
encountered by a VT in the current
15 minute interval."
::= { sonetVTCurrentEntry 6 }
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-- the SONET/SDH VT Interval Table
-- The SONET/SDH VT Interval Table
-- contains various statistics
-- collected by each system over a maximum
-- of the previous 24 hours of
-- operation. The past 24 hours may be broken into 96
-- completed 15 minute intervals.
-- A system is required to store at
-- least 4 completed 15 minute interval.
-- The default value is 32 intervals.
sonetVTIntervalTable OBJECT-TYPE
SYNTAX SEQUENCE OF SonetVTIntervalEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The SONET/SDH VT Interval table."
::= { sonetVT 2 }
sonetVTIntervalEntry OBJECT-TYPE
SYNTAX SonetVTIntervalEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry in the SONET/SDH VT Interval table."
INDEX { ifIndex,
sonetVTIntervalNumber }
::= { sonetVTIntervalTable 1 }
SonetVTIntervalEntry ::=
SEQUENCE {
sonetVTIntervalNumber Integer32,
sonetVTIntervalESs PerfIntervalCount,
sonetVTIntervalSESs PerfIntervalCount,
sonetVTIntervalCVs PerfIntervalCount,
sonetVTIntervalUASs PerfIntervalCount,
sonetVTIntervalValidData TruthValue
}
sonetVTIntervalNumber OBJECT-TYPE
SYNTAX Integer32 (1..96)
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
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"A number between 1 and 96, which identifies the
interval for which the set of statistics is available.
The interval identified by 1 is the most recently
completed 15 minute interval,
and the interval identified
by N is the interval immediately preceding the
one identified
by N-1."
::= { sonetVTIntervalEntry 1 }
sonetVTIntervalESs OBJECT-TYPE
SYNTAX PerfIntervalCount
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The counter associated with the number of
Errored Seconds encountered
by a SONET/SDH VT in a particular 15-minute interval
in the past 24 hours."
::= { sonetVTIntervalEntry 2 }
sonetVTIntervalSESs OBJECT-TYPE
SYNTAX PerfIntervalCount
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The counter associated with the number of
Severely Errored Seconds
encountered by a SONET/SDH VT
in a particular 15-minute interval
in the past 24 hours."
::= { sonetVTIntervalEntry 3 }
sonetVTIntervalCVs OBJECT-TYPE
SYNTAX PerfIntervalCount
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The counter associated with the number of Coding
Violations encountered by a
SONET/SDH VT in a particular 15-minute interval
in the past 24 hours."
::= { sonetVTIntervalEntry 4 }
sonetVTIntervalUASs OBJECT-TYPE
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SYNTAX PerfIntervalCount
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The counter associated with the number of
Unavailable Seconds
encountered by a VT in a particular 15-minute interval
in the past 24 hours."
::= { sonetVTIntervalEntry 5 }
sonetVTIntervalValidData OBJECT-TYPE
SYNTAX TruthValue
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This variable indicates if there is valid data for
this interval."
::= { sonetVTIntervalEntry 6 }
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-- The SONET/SDH Far End VT group
-- This group consists of two tables:
-- SONET/SDH Far End VT Current Table
-- SONET/SDH Far End VT Interval Table
-- The SONET/SDH Far End VT Current
-- The SONET/SDH Far End VT Current table
-- contains various statistics
-- being collected for the current 15 minute interval.
-- The statistics are collected from
-- the far end block error code
-- (FEBE) within the G1 byte of the VT Overhead.
-- The definitions are the same as described for
-- the near-end information.
sonetFarEndVTCurrentTable OBJECT-TYPE
SYNTAX SEQUENCE OF SonetFarEndVTCurrentEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The SONET/SDH Far End VT Current table."
::= { sonetFarEndVT 1 }
sonetFarEndVTCurrentEntry OBJECT-TYPE
SYNTAX SonetFarEndVTCurrentEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry in the SONET/SDH Far End VT Current table."
INDEX { ifIndex }
::= { sonetFarEndVTCurrentTable 1 }
SonetFarEndVTCurrentEntry ::=
SEQUENCE {
sonetFarEndVTCurrentESs PerfCurrentCount,
sonetFarEndVTCurrentSESs PerfCurrentCount,
sonetFarEndVTCurrentCVs PerfCurrentCount,
sonetFarEndVTCurrentUASs PerfCurrentCount
}
sonetFarEndVTCurrentESs OBJECT-TYPE
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SYNTAX PerfCurrentCount
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The counter associated with the number of Far
End Errored Seconds encountered by a SONET/SDH
interface in the current 15 minute interval."
::= { sonetFarEndVTCurrentEntry 1 }
sonetFarEndVTCurrentSESs OBJECT-TYPE
SYNTAX PerfCurrentCount
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The counter associated with the number of
Far End Severely Errored Seconds
encountered by a SONET/SDH VT interface
in the current 15 minute
interval."
::= { sonetFarEndVTCurrentEntry 2 }
sonetFarEndVTCurrentCVs OBJECT-TYPE
SYNTAX PerfCurrentCount
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The counter associated with the number of
Far End Coding Violations reported via
the far end block error count
encountered by a
SONET/SDH VT interface
in the current 15 minute interval."
::= { sonetFarEndVTCurrentEntry 3 }
sonetFarEndVTCurrentUASs OBJECT-TYPE
SYNTAX PerfCurrentCount
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The counter associated with the number of
Far End Unavailable Seconds
encountered by a
SONET/SDH VT interface
in the current 15 minute interval."
::= { sonetFarEndVTCurrentEntry 4 }
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-- The SONET/SDH Far End VT Interval Table
-- The SONET/SDH Far End VT Interval Table
-- contains various statistics
-- collected by each system over a maximum
-- of the previous 24 hours of
-- operation. The past 24 hours may be broken into 96
-- completed 15 minute intervals.
-- A system is required to store at
-- least 4 completed 15 minute interval.
-- The default value is 32 intervals.
sonetFarEndVTIntervalTable OBJECT-TYPE
SYNTAX SEQUENCE OF SonetFarEndVTIntervalEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The SONET/SDH Far End VT Interval table."
::= { sonetFarEndVT 2 }
sonetFarEndVTIntervalEntry OBJECT-TYPE
SYNTAX SonetFarEndVTIntervalEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry in the SONET/SDH Far
End VT Interval table."
INDEX { ifIndex,
sonetFarEndVTIntervalNumber }
::= { sonetFarEndVTIntervalTable 1 }
SonetFarEndVTIntervalEntry ::=
SEQUENCE {
sonetFarEndVTIntervalNumber Integer32,
sonetFarEndVTIntervalESs PerfIntervalCount,
sonetFarEndVTIntervalSESs PerfIntervalCount,
sonetFarEndVTIntervalCVs PerfIntervalCount,
sonetFarEndVTIntervalUASs PerfIntervalCount,
sonetFarEndVTIntervalValidData TruthValue
}
sonetFarEndVTIntervalNumber OBJECT-TYPE
SYNTAX Integer32 (1..96)
MAX-ACCESS not-accessible
STATUS current
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DESCRIPTION
"A number between 1 and 96, which identifies the
interval for which the set of statistics is available.
The interval identified by 1 is the most recently
completed 15 minute interval,
and the interval identified
by N is the interval immediately preceding the
one identified
by N-1."
::= { sonetFarEndVTIntervalEntry 1 }
sonetFarEndVTIntervalESs OBJECT-TYPE
SYNTAX PerfIntervalCount
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The counter associated with the number of
Far End Errored Seconds encountered
by a SONET/SDH VT interface
in a particular 15-minute interval
in the past 24 hours."
::= { sonetFarEndVTIntervalEntry 2 }
sonetFarEndVTIntervalSESs OBJECT-TYPE
SYNTAX PerfIntervalCount
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The counter associated with the number of
Far End Severely Errored Seconds
encountered by a SONET/SDH VT interface
in a particular 15-minute interval
in the past 24 hours."
::= { sonetFarEndVTIntervalEntry 3 }
sonetFarEndVTIntervalCVs OBJECT-TYPE
SYNTAX PerfIntervalCount
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The counter associated with the number of
Far End Coding Violations reported via
the far end block error count
encountered by a
SONET/SDH VT interface in a
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particular 15-minute interval
in the past 24 hours."
::= { sonetFarEndVTIntervalEntry 4 }
sonetFarEndVTIntervalUASs OBJECT-TYPE
SYNTAX PerfIntervalCount
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The counter associated with the number of
Far End Unavailable Seconds
encountered by a
SONET/SDH VT interface in a
particular 15-minute interval
in the past 24 hours."
::= { sonetFarEndVTIntervalEntry 5 }
sonetFarEndVTIntervalValidData OBJECT-TYPE
SYNTAX TruthValue
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This variable indicates if there is valid data for
this interval."
::= { sonetFarEndVTIntervalEntry 6 }
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-- conformance information
sonetConformance OBJECT IDENTIFIER ::= { sonetMIB 4 }
sonetGroups OBJECT IDENTIFIER ::= { sonetConformance 1 }
sonetCompliances OBJECT IDENTIFIER ::= { sonetConformance 2 }
-- deprecated compliance statement
sonetCompliance MODULE-COMPLIANCE
STATUS deprecated
DESCRIPTION
"The compliance statement for SONET/SDH interfaces."
MODULE -- this module
MANDATORY-GROUPS { sonetMediumStuff, sonetSectionStuff }
GROUP sonetLineStuff
DESCRIPTION
"Implementation of this group is mandatory for all
SONET/SDH systems that terminate SONET/SDH Lines,
Paths or Virtual Tributaries."
GROUP sonetFarEndLineStuff
DESCRIPTION
"Implementation of this group is optional for all
SONET/SDH systems that terminate SONET/SDH Lines,
Paths or Virtual Tributaries, and that
provide for a far end block error (FEBE)
information at the SONET/SDH Line Layer."
GROUP sonetPathStuff
DESCRIPTION
"Implementation of this group is mandatory for all
SONET/SDH systems that terminate SONET/SDH
Paths or Virtual
Tributaries."
OBJECT sonetPathCurrentWidth
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."
GROUP sonetFarEndPathStuff
DESCRIPTION
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"Implementation of this group is optional for all
SONET/SDH systems that terminate SONET/SDH
Paths or Virtual
Tributaries, and that process
Far End information."
GROUP sonetVTStuff
DESCRIPTION
"Implementation of this group is mandatory for all
SONET/SDH systems that terminate SONET/SDH Virtual
Tributaries."
OBJECT sonetVTCurrentWidth
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."
GROUP sonetFarEndVTStuff
DESCRIPTION
"Implementation of this group is optional for all
SONET/SDH systems that terminate the SONET/SDH
floating Virtual
Tributaries, and that process Far End information."
::= { sonetCompliances 1 }
-- current compliance statements
sonetCompliance2 MODULE-COMPLIANCE
STATUS current
DESCRIPTION
"The compliance statement for SONET/SDH interfaces."
MODULE -- this module
MANDATORY-GROUPS { sonetMediumStuff2, sonetSectionStuff2 }
OBJECT sonetMediumCircuitIdentifier
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."
OBJECT sonetMediumLoopbackConfig
MIN-ACCESS read-only
DESCRIPTION
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"Write access is not required."
OBJECT sonetSESthresholdSet
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required, and only one
of the enumerated values need be supported."
GROUP sonetLineStuff2
DESCRIPTION
"Implementation of this group is mandatory for all
SONET/SDH systems that terminate SONET/SDH Lines,
Paths or Virtual Tributaries."
GROUP sonetFarEndLineStuff2
DESCRIPTION
"Implementation of this group is optional for all
SONET/SDH systems that terminate SONET/SDH Lines,
Paths or Virtual Tributaries, and that
provide for a far end block error (FEBE)
information at the SONET/SDH Line Layer."
GROUP sonetPathStuff2
DESCRIPTION
"Implementation of this group is mandatory for all
SONET/SDH systems that terminate SONET/SDH
Paths or Virtual
Tributaries."
OBJECT sonetPathCurrentWidth
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."
GROUP sonetFarEndPathStuff2
DESCRIPTION
"Implementation of this group is optional for all
SONET/SDH systems that terminate SONET/SDH
Paths or Virtual
Tributaries, and that process
Far End information."
GROUP sonetVTStuff2
DESCRIPTION
"Implementation of this group is mandatory for all
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SONET/SDH systems that terminate SONET/SDH Virtual
Tributaries."
OBJECT sonetVTCurrentWidth
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."
GROUP sonetFarEndVTStuff2
DESCRIPTION
"Implementation of this group is optional for all
SONET/SDH systems that terminate the SONET/SDH
floating Virtual
Tributaries, and that process Far End information."
::= { sonetCompliances 2 }
-- units of conformance
-- deprecated groups
sonetMediumStuff OBJECT-GROUP
OBJECTS { sonetMediumType,
sonetMediumTimeElapsed,
sonetMediumValidIntervals,
sonetMediumLineCoding,
sonetMediumLineType,
sonetMediumCircuitIdentifier }
STATUS deprecated
DESCRIPTION
"A collection of objects providing configuration
information applicable to all SONET/SDH interfaces."
::= { sonetGroups 1 }
sonetSectionStuff OBJECT-GROUP
OBJECTS { sonetSectionCurrentStatus,
sonetSectionCurrentESs,
sonetSectionCurrentSESs,
sonetSectionCurrentSEFSs,
sonetSectionCurrentCVs,
sonetSectionIntervalESs,
sonetSectionIntervalSESs,
sonetSectionIntervalSEFSs,
sonetSectionIntervalCVs
}
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STATUS deprecated
DESCRIPTION
"A collection of objects providing information
specific to SONET/SDH Section interfaces."
::= { sonetGroups 2 }
sonetLineStuff OBJECT-GROUP
OBJECTS { sonetLineCurrentStatus,
sonetLineCurrentESs,
sonetLineCurrentSESs,
sonetLineCurrentCVs,
sonetLineCurrentUASs,
sonetLineIntervalESs,
sonetLineIntervalSESs,
sonetLineIntervalCVs,
sonetLineIntervalUASs }
STATUS deprecated
DESCRIPTION
"A collection of objects providing information
specific to SONET/SDH Line interfaces."
::= { sonetGroups 3 }
sonetFarEndLineStuff OBJECT-GROUP
OBJECTS { sonetFarEndLineCurrentESs,
sonetFarEndLineCurrentSESs,
sonetFarEndLineCurrentCVs,
sonetFarEndLineCurrentUASs,
sonetFarEndLineIntervalESs,
sonetFarEndLineIntervalSESs,
sonetFarEndLineIntervalCVs,
sonetFarEndLineIntervalUASs }
STATUS deprecated
DESCRIPTION
"A collection of objects providing information
specific to SONET/SDH Line interfaces,
and maintaining Line Far End information."
::= { sonetGroups 4 }
sonetPathStuff OBJECT-GROUP
OBJECTS { sonetPathCurrentWidth,
sonetPathCurrentStatus,
sonetPathCurrentESs,
sonetPathCurrentSESs,
sonetPathCurrentCVs,
sonetPathCurrentUASs,
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sonetPathIntervalESs,
sonetPathIntervalSESs,
sonetPathIntervalCVs,
sonetPathIntervalUASs }
STATUS deprecated
DESCRIPTION
"A collection of objects providing information
specific to SONET/SDH Path interfaces."
::= { sonetGroups 5 }
sonetFarEndPathStuff OBJECT-GROUP
OBJECTS { sonetFarEndPathCurrentESs,
sonetFarEndPathCurrentSESs,
sonetFarEndPathCurrentCVs,
sonetFarEndPathCurrentUASs,
sonetFarEndPathIntervalESs,
sonetFarEndPathIntervalSESs,
sonetFarEndPathIntervalCVs,
sonetFarEndPathIntervalUASs }
STATUS deprecated
DESCRIPTION
"A collection of objects providing information
specific to SONET/SDH Path interfaces,
and maintaining Path Far End information."
::= { sonetGroups 6 }
sonetVTStuff OBJECT-GROUP
OBJECTS { sonetVTCurrentWidth,
sonetVTCurrentStatus,
sonetVTCurrentESs,
sonetVTCurrentSESs,
sonetVTCurrentCVs,
sonetVTCurrentUASs,
sonetVTIntervalESs,
sonetVTIntervalSESs,
sonetVTIntervalCVs,
sonetVTIntervalUASs }
STATUS deprecated
DESCRIPTION
"A collection of objects providing information
specific to SONET/SDH VT interfaces."
::= { sonetGroups 7 }
sonetFarEndVTStuff OBJECT-GROUP
OBJECTS { sonetFarEndVTCurrentESs,
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sonetFarEndVTCurrentSESs,
sonetFarEndVTCurrentCVs,
sonetFarEndVTCurrentUASs,
sonetFarEndVTIntervalESs,
sonetFarEndVTIntervalSESs,
sonetFarEndVTIntervalCVs,
sonetFarEndVTIntervalUASs }
STATUS deprecated
DESCRIPTION
"A collection of objects providing information
specific to SONET/SDH VT interfaces,
and maintaining VT Far End information."
::= { sonetGroups 8 }
-- current groups
sonetMediumStuff2 OBJECT-GROUP
OBJECTS { sonetMediumType,
sonetMediumTimeElapsed,
sonetMediumValidIntervals,
sonetMediumLineCoding,
sonetMediumLineType,
sonetMediumCircuitIdentifier,
sonetMediumInvalidIntervals,
sonetMediumLoopbackConfig,
sonetSESthresholdSet }
STATUS current
DESCRIPTION
"A collection of objects providing configuration
information applicable to all SONET/SDH interfaces."
::= { sonetGroups 9 }
sonetSectionStuff2 OBJECT-GROUP
OBJECTS { sonetSectionCurrentStatus,
sonetSectionCurrentESs,
sonetSectionCurrentSESs,
sonetSectionCurrentSEFSs,
sonetSectionCurrentCVs,
sonetSectionIntervalESs,
sonetSectionIntervalSESs,
sonetSectionIntervalSEFSs,
sonetSectionIntervalCVs,
sonetSectionIntervalValidData }
STATUS current
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DESCRIPTION
"A collection of objects providing information
specific to SONET/SDH Section interfaces."
::= { sonetGroups 10 }
sonetLineStuff2 OBJECT-GROUP
OBJECTS { sonetLineCurrentStatus,
sonetLineCurrentESs,
sonetLineCurrentSESs,
sonetLineCurrentCVs,
sonetLineCurrentUASs,
sonetLineIntervalESs,
sonetLineIntervalSESs,
sonetLineIntervalCVs,
sonetLineIntervalUASs,
sonetLineIntervalValidData }
STATUS current
DESCRIPTION
"A collection of objects providing information
specific to SONET/SDH Line interfaces."
::= { sonetGroups 11 }
sonetPathStuff2 OBJECT-GROUP
OBJECTS { sonetPathCurrentWidth,
sonetPathCurrentStatus,
sonetPathCurrentESs,
sonetPathCurrentSESs,
sonetPathCurrentCVs,
sonetPathCurrentUASs,
sonetPathIntervalESs,
sonetPathIntervalSESs,
sonetPathIntervalCVs,
sonetPathIntervalUASs,
sonetPathIntervalValidData }
STATUS current
DESCRIPTION
"A collection of objects providing information
specific to SONET/SDH Path interfaces."
::= { sonetGroups 12 }
sonetVTStuff2 OBJECT-GROUP
OBJECTS { sonetVTCurrentWidth,
sonetVTCurrentStatus,
sonetVTCurrentESs,
sonetVTCurrentSESs,
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sonetVTCurrentCVs,
sonetVTCurrentUASs,
sonetVTIntervalESs,
sonetVTIntervalSESs,
sonetVTIntervalCVs,
sonetVTIntervalUASs,
sonetVTIntervalValidData }
STATUS current
DESCRIPTION
"A collection of objects providing information
specific to SONET/SDH VT interfaces."
::= { sonetGroups 13 }
sonetFarEndLineStuff2 OBJECT-GROUP
OBJECTS { sonetFarEndLineCurrentESs,
sonetFarEndLineCurrentSESs,
sonetFarEndLineCurrentCVs,
sonetFarEndLineCurrentUASs,
sonetFarEndLineIntervalESs,
sonetFarEndLineIntervalSESs,
sonetFarEndLineIntervalCVs,
sonetFarEndLineIntervalUASs,
sonetFarEndLineIntervalValidData }
STATUS current
DESCRIPTION
"A collection of objects providing information
specific to SONET/SDH Line interfaces,
and maintaining Line Far End information."
::= { sonetGroups 14 }
sonetFarEndPathStuff2 OBJECT-GROUP
OBJECTS { sonetFarEndPathCurrentESs,
sonetFarEndPathCurrentSESs,
sonetFarEndPathCurrentCVs,
sonetFarEndPathCurrentUASs,
sonetFarEndPathIntervalESs,
sonetFarEndPathIntervalSESs,
sonetFarEndPathIntervalCVs,
sonetFarEndPathIntervalUASs,
sonetFarEndPathIntervalValidData }
STATUS current
DESCRIPTION
"A collection of objects providing information
specific to SONET/SDH Path interfaces,
and maintaining Path Far End information."
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::= { sonetGroups 15 }
sonetFarEndVTStuff2 OBJECT-GROUP
OBJECTS { sonetFarEndVTCurrentESs,
sonetFarEndVTCurrentSESs,
sonetFarEndVTCurrentCVs,
sonetFarEndVTCurrentUASs,
sonetFarEndVTIntervalESs,
sonetFarEndVTIntervalSESs,
sonetFarEndVTIntervalCVs,
sonetFarEndVTIntervalUASs,
sonetFarEndVTIntervalValidData }
STATUS current
DESCRIPTION
"A collection of objects providing information
specific to SONET/SDH VT interfaces,
and maintaining VT Far End information."
::= { sonetGroups 16 }
END
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7. Acknowledgments
This specification is a product of the AToM MIB Working Group.
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8. Security Considerations
Security issues are not discussed in this memo.
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9. 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] SNMPv2 Working Group, Case, J., McCloghrie, K., Rose, M.,
and S. Waldbusser, "Textual Conventions for version 2 of
the Simple Network Management Protocol (SNMPv2)", RFC
1903, January 1996.
[3] SNMPv2 Working Group, Case, J., McCloghrie, K., Rose, M.,
and S. Waldbusser, "Conformance Statements for Version 2
of the Simple Network Management Protocol (SNMPv2)", RFC
1904, January 1996.
[4] Case, J., Fedor, M., Schoffstall, M., and J. Davin,
"Simple Network Management Protocol", RFC 1157, SNMP
Research, Performance Systems International, Performance
Systems International, MIT Laboratory for Computer
Science, May 1990.
[5] 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.
[6] McCloghrie, K., and M. Rose, "Management Information Base
for Network Management of TCP/IP-based internets - MIB-
II", RFC 1213, Hughes LAN Systems, Performance Systems
International, March 1991.
[7] Information processing systems - Open Systems
Interconnection - Specification of Abstract Syntax
Notation One (ASN.1), International Organization for
Standardization. International Standard 8824, (December,
1987).
[8] Information processing systems - Open Systems
Interconnection - Specification of Basic Encoding Rules
for Abstract Notation One (ASN.1), International
Organization for Standardization. International Standard
8825, (December, 1987).
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[9] American National Standard for Telecommunications -
Digital Hierarchy - Optical Interface Rates and Formats
Specification, ANSI T1.105-1988.
[9a] ANSI T1.105-1991.
[10] American National Standard for Telecommunications -
Digital Hierarchy - Optical Interface Specification
(Single-Mode), ANSI T1.106-1988.
[11] American National Standard for Telecommunications --
Layer 1 In-Service Digital Transmission Performance
Monitoring T1.231, September 1993.
[12] K. McCloghrie and F. Kastenholz, Evolution of Interfaces
Group of MIB-II, Internet Draft, November 29, 1993.
[13] Fowler, D., "Definitions of Managed Objects for the
DS3/E3 Interface Type", RFCxxxx, Newbridge Networks, ????
1996.
[14] Fowler, D., "Definitions of Managed Objects for the DS1,
E1, DS2 and E2 Interface Types", RFCxxxx, Newbridge
Networks, ????? 1996.
[15] CCITT Recommendation G.707, "Synchronous Digital
Hierarchy Bit Rates", June 1992.
[16] CCITT Recommendation G.708, "Network Node Interface for
the Synchronous Digital Hierarchy", June 1992.
[17] CCITT Recommendation G.709, "Synchronous Multiplexing
Structure", June 1992.
[18] CCITT Recommendation G.783, "Characteristics of
Synchronous Digital Hierarchy (SDH) Multiplexing
Equipment Functional Blocks", November 1992.
[19] Brown, T., and K. Tesink, "Definitions of Managed Objects
for the SONET/SDH Interface Type", RFC1595, Bellcore,
March 1994.
[20] ANSI T1.231 1993
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[21] Bellcore TR-NWT-000253, 1991
[22] ITU Recommendation G.826, "Error Performance Parameters
and Objectives for International Constant Bit Rate
Digital Paths at or above Primary Rate", September 1995
(COM 13-R57E).
[23] Bellcore GR-253-CORE, Issue 2, Synchronous Optical
Network (SONET) Transport SystemsL Common Generic
Criteria", December 1995.
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10. Author's Address
Kaj Tesink
Bell Communications Research
331 Newman Springs Road
P.O. Box 7020
Red Bank, NJ 07701-7020
Phone: (908) 758-5254
EMail: kaj@cc.bellcore.com
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Appendix A: The delay-line approach to statistics collection.
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 -- and while an interface is deemed unavailable all
counters for that interface are frozen except for the UAS
count. Since changes in the signal state lag the data to
which they apply by 10 seconds, an implementation which wishes
to avoid making retroactive adjustments to the counts 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 line and path CV counts 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 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 procedure guarantees that the statistical counters will
be correctly updated at all times, although they lag real time
by 10 seconds. It is illustrated in the figure below. 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 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 anew at each
interval boundary; rather, signal state information is
retained across interval boundaries.
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+--------------------------------------------------------------+
| READ COUNTERS & STATUS INFO FROM HARDWARE |
| |
|LOS OOF/ SECT LINE LINE LINE LINE PATH PATH PATH PATH PATH |
| LOF CV AIS CV RDI FEBE AIS LOP CV RDI CV |
+--------------------------------------------------------------+
| | | | | | | | | | | |
| | | | | | | | | | | |
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 NEAR END/FAR END |
|SECT SECT SECT LINE LINE LINE LINE PATH PATH PATH PATH |
|CV ES SES CV ES SES AVA/UNA CV ES SES AVA/UNA |
+--------------------------------------------------------------+
| | | | | | | | | | |
| | | | | | | | | | |
V V V V V V | V V V |
+-------------+ +-------------+ | +-------------+ |
|ONE-SEC DELAY| |ONE-SEC DELAY| | |ONE-SEC DELAY| |
| (1 OF 10) | | (1 OF 10) | | | (1 OF 10) | |
|CV ES SES| |CV ES SES| | |CV ES SES| |
+-------------+ +-------------+ | +-------------+ |
| | | | | | | | | | |
/ / / / / / / / / / /
/ / / / / / / / / / /
| | | | | | | | | | |
V V V V V V | V V V |
+-------------+ +-------------+ | +-------------+ |
|ONE-SEC DELAY| |ONE-SEC DELAY| | |ONE-SEC DELAY| |
| (10 OF 10) | | (10 OF 10) | | | (10 OF 10) | |
|CV ES SES| |CV ES SES| | |CV ES SES| |
+-------------+ +-------------+ | +-------------+ |
| | | | | | | | | | |
| | | | | | | | | | |
V V V V V V V V V V V
+--------------------------------------------------------------+
| UPDATE STATISTICS COUNTERS |
| |
| NEAR END/FAR END NEAR END/FAR END |
| SECTION LINE PATH |
| CV ES EFS SES CV ES EFS SES AS UAS CV ES EFS SES AS UAS |
+--------------------------------------------------------------+
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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.
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Appendix B - RFC1595 SES interpretation
This appendix contains the values for x for the Section, Line,
Path, and VT Layers as used in [11, 19, 21].
Value for x for SONET/SDH Section SES Definition
Rate x Minimum Bit Error Rate
=======================================================
OC-1 9 1.5 x 10^-7
OC-3 16 1 x 10^-7
OC-9 47 1 x 10^-7
OC-12 63 1 x 10^-7
OC-18 94 1 x 10^-7
OC-24 125 1 x 10^-7
OC-36 187 1 x 10^-7
OC-48 249 1 x 10^-7
Value for x for SONET/SDH Line SES Definition
Rate x Minimum Bit Error Rate
=======================================================
OC-1 12 2 x 10^-7
OC-3 32 2 x 10^-7
OC-9 47 2 x 10^-7
OC-12 124 2 x 10^-7
OC-18 186 2 x 10^-7
OC-24 248 2 x 10^-7
OC-36 370 2 x 10^-7
OC-48 494 2 x 10^-7
Value for x for SONET/SDH STS-Path SES Definition
Rate x Minimum Bit Error Rate
=======================================================
STS-1 9 1.5 x 10^-7
STS-3 16 1 x 10^-7
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Value for x for SONET/SDH VT-Path SES Definition
Rate x Minimum Bit Error Rate
=======================================================
VT1.5 4 2 x 10^-6
VT2 6 2 x 10^-6
VT3 8 2 x 10^-6
VT6 14 2 x 10^-6
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Table of Contents
1 Status of this Memo ................................... 1
2 Abstract .............................................. 2
3 The SNMP Network Management Framework ................. 3
4 Objects ............................................... 4
4.1 Format of Definitions ............................... 4
5 Overview .............................................. 5
5.1 Use of the ifTable .................................. 5
5.2 Use of ifTable for SONET/SDH Medium/Section/Line
Layer .............................................. 6
5.3 Use of ifTable for SONET/SDH Paths .................. 7
5.4 Use of ifTable for SONET/SDH VTs/VCs ................ 8
5.5 SONET/SDH Terminology ............................... 9
6 Object Definitions .................................... 19
6.1 The SONET/SDH Medium Group .......................... 21
6.2 The SONET/SDH Section Group ......................... 26
6.2.1 The SONET/SDH Section Current Group ............... 26
6.2.2 The SONET/SDH Section Interval Group .............. 29
6.3 The SONET/SDH Line Group ............................ 32
6.3.1 The SONET/SDH Line Current Group .................. 32
6.3.2 The SONET/SDH Line Interval Group ................. 35
6.4 The SONET/SDH Far End Line Group .................... 38
6.4.1 The SONET/SDH Far End Line Current Group .......... 38
6.4.2 The SONET/SDH Far End Line Interval Group ......... 41
6.5 The SONET/SDH Path Group ............................ 44
6.5.1 The SONET/SDH Path Current Group .................. 44
6.5.2 The SONET/SDH Path Interval Group ................. 47
6.6 The SONET/SDH Far End Path Group .................... 50
6.6.1 The SONET/SDH Far End Path Current Group .......... 50
6.6.2 The SONET/SDH Far End Path Interval Group ......... 52
6.7 The SONET/SDH Virtual Tributary Group ............... 55
6.7.1 The SONET/SDH VT Current Group .................... 55
6.7.2 The SONET/SDH VT Interval Group ................... 58
6.8 The SONET/SDH Far End VT Group ...................... 61
6.8.1 The SONET/SDH Far End VT Current Group ............ 61
6.8.2 The SONET/SDH Far End VT Interval Group ........... 63
6.9 Conformance Information ............................. 66
6.10 Compliance Statements .............................. 66
7 Acknowledgments ....................................... 76
8 Security Considerations ............................... 77
9 References ............................................ 78
10 Author's Address ..................................... 81
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