Network Working Group
Request for Comments: 3591
Category: Standards Track
H-K. Lam
Lucent Technologies
M. Stewart
Dorado Software
A. Huynh
Cetus Networks
September 2003
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Definitions of Managed Objects for the Optical Interface Type

Status of this Memo

This document specifies an Internet standards track protocol for the Internet community, and requests discussion and suggestions for improvements. Please refer to the current edition of the "Internet Official Protocol Standards" (STD 1) for the standardization state and status of this protocol. Distribution of this memo is unlimited.

Copyright Notice

Copyright © The Internet Society (2003). All Rights Reserved.

Abstract

This memo defines a portion of the Management Information Base (MIB) for use with Simple Network Management Protocol (SNMP) in TCP/IP- based internets. In particular, it defines objects for managing Optical Interfaces associated with WavelengthDivision Multiplexing systems or characterized by the Optical Transport Network (OTN) in accordance with the OTN architecture defined in ITU-T Recommendation G.872.

The MIB module defined in this memo can be used for performance monitoring and/or configuration of such optical interface.


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Table of Contents

1. The Internet-Standard Management Framework
2. Overview
2.1. Use of the ifTable
2.2. Use of ifTable for OTN OTS/OMS Layer
2.3. Use of ifTable for OTN OChGroup Layer
2.4. Use of ifTable for OTN OCh Layer
2.5. Use of ifStackTable
2.6. Optical Network Terminology
2.7. Tandem Connection Monitoring (TCM)
3. Structure of the MIB
3.1. The optIfOTMn group
3.2. The optIfPerfMon group
3.3. The optIfOTSn groups
3.4. The optIfOMSn groups
3.5. The optIfOChGroup groups
3.6. The optIfOCh groups
3.7. The optIfOTUk groups
3.8. The optIfODUk groups
3.9. The optIfODUkT groups
4. Object Definitions
5. Security Considerations
6. Acknowledgments
7. References
7.1. Normative References
7.2. Informative References
8. Intellectual Property Statement
9. Authors' Addresses
10. Full Copyright Statement

1 The Internet-Standard Management Framework

For a detailed overview of the documents that describe the current Internet-Standard Management Framework, please refer to section 7 of RFC 3410 [RFC3410].

Managed objects are accessed via a virtual information store, termed the Management Information Base or MIB. MIB objects are generally accessed through the Simple Network Management Protocol (SNMP). Objects in the MIB are defined using the mechanisms defined in the Structure of Management Information (SMI). This memo specifies a MIB module that is compliant to the SMIv2, which is described in STD 58, RFC 2578 [RFC2578], STD 58, RFC 2579 [RFC2579] and STD 58, RFC 2580 [RFC2580].


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2 Overview

In this document, the term OTN (Optical Transport Network) system is used to describe devices that are compliant with the requirements specified in the ITU-T Recommendations G.872 [ITU-T G.872], G.709 [ITU-T G.709], G.798 [ITU-T G.798], G.874 [ITU-T G.874], and G.874.1 [ITU-T G.874.1].

The optical objects will be managed using the MIB II ifTable and ifStackTable. Additional tables will also be supported to monitor layer specific status and provide performance monitoring data. In the tables, some entries are required for OTN systems only. A Configuration (Config) table, Current Performance Monitoring (PM) table, and Interval PM table will be maintained for the OTSn, OMSn, OChGroup, and OCh layers on a source and sink trail termination basis. These tables will be linked to the ifTable by using the ifIndex that is associated with that layer.

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

opticalChannel (195), opticalChannelGroup (219), opticalTransport (196)

The definitions contained herein are based on the OTN specifications in ITU-T G.872[ITU-T G.872], G.709 [ITU-T G.709], G.798[ITU-T G.798], G.874[ITU-T G.874], and G.874.1 [ITU-T G.874.1].

2.1 Use of the ifTable

This section specifies how the MIB II interfaces group, as defined in RFC 2863 [RFC2863], is used for optical interfaces. Only the ifGeneralInformationGroup will be supported for the ifTable and the ifStackTable to maintain the relationship between the various layers. The OTN layers are managed in the ifTable using IfEntries that correlate to the layers depicted in Figure 1.

For example, a DWDM device with an Optical Network Node Interface (ONNI) will have an Optical Transmission Section (OTS) physical layer, an Optical Multiplex Section (OMS) layer (transports multiple optical channels), and an Optical Channel (OCh) layer. There is a one to one relationship between the OMS and OTS layers. The OMS layer has fixed connectivity via the OTS and thus no connectivity flexibility at the OMS layer is supported.


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A device with an ONNI that does not multiplex would consist of the OTS and OCh layers supporting a single channel.

MIB-II (RFC 1213) [RFC1213], as amended and extended by RFC 3418 [RFC3418], RFC 2863 [RFC2863], and RFC 2864 [RFC2864], accommodates these cases through appropriate use of the system and interfaces groups. The system group names and describes the type of managed resource. The interfaces group defines which OTN layers exist and how these layers are configured and multiplexed. This is achieved by proper representation of OTN Layers as IfEntries as defined in RFC 2863 [RFC2863], as follows.

In the following figures, opticalChannel and opticalTransport are abbreviated as och and otn respectively.

   _____________________
                        \
      Path Data Unit    |\
          (ODUk)        | \
   _____________________|  \ ______________________
                        |   |                      |  >
     Tandem Data Unit   |   |                      |  |
          (ODUkT)       |   |    OCh  Layer        |   > n och IfEntries
   _____________________|   |                      |  |
                        |   |______________________|  >
           Optical      |  /|                      |  >
       Transport Unit   | / |                      |  |
           (OTUk)       |/  |    OMSn Layer        |  |
   _____________________/   |                      |  |
                            |______________________|  |
      Sub-layers in         |                      |   > m otn IfEntries
      the OCh Layer         |                      |  |
                            |    OTSn Layer        |  |
                            |                      |  |
                            |______________________|  >

Figure 1: OTN Layers

Since the OMSn and OTSn layers have a one to one relationship, only one otn IfEntry is required to support these two layers. Therefore, each opticalChannel IfEntry may be mapped to m opticalTransport IfEntries, where m is greater than or equal to 1. Conversely, each opticalTransport entry may be mapped to n opticalChannel IfEntries, where n is greater than or equal to 1.

There are implementations that have banded amplifers that operate on a group of optical channels separately (e.g., C and L band channels) before finally muxing them together and transporting them over a


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physical layer. For such DWDM system implementations, it is important to have the ability to model each of the groups (or bands) with an ifIndex and measure the pre-OTN PM parameters for each band separately.

The OTN layering, as described in Figure 1, can be extended to accomodate such implementations by introducing another layer called the OChGroup Layer.

As an example, Figure 2 depicts the OTN layering of a DWDM system with 80 C-band and 80 L-band channels combined into their respective channel band groups before being muxed into the OMS and transported over the OTS.

                   _________    ____________
                  |O|O|  |O |  |O |O |  |O  | >
                  |C|C|  |C |  |C |C |  |C  | |
                  |h|h|..|h |  |h |h |..|h  |  > x och IfEntries
                  |1|2|  |80|  |81|82|  |160| |
                  |_|_|__|__|  |__|__|__|___| >
                  |         |  |            | >
                  |         |  |            | |
                  |OChGroup1|  | OChGroup2  |  > n ochgroup IfEntries
                  |         |  |            | |
                  |_________|__|____________| >
                  |                         | >
                  |                         | |
                  |        OMSn Layer       | |
                  |                         | |
                  |_________________________| |
                  |                         |  > m otn IfEntries
                  |                         | |
                  |        OTSn Layer       | |
                  |                         | |
                  |_________________________| >

Figure 2: OTN Layers for a Banded Configuration

If an implementation does not wish to model the banded configuration, the OChGroup layer is absent and the OTN layering model degenerates to the description in Figure 1. In other words, when there is an amplifier that covers the whole band, the optIfOMSn objects should be used, rather than using the optIfOChGroup objects with a degenerate group that covers all channels.

The design of the Optical Interface MIB provides the option to model an interface either as a single bidirectional object containing both sink and source functions or as a pair of unidirectional objects, one containing sink functions and the other containing source functions.


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If the sink and source for a given protocol layer are to be modelled as separate objects, then there need to be two ifTable entries, one that corresponds to the sink and one that corresponds to the source, where the directionality information is provided in the configuration tables for that layer via the xxxDirectionality objects. The agent is expected to maintain consistent directionality values between ifStackTable layers (e.g., a sink must not be stacked in a 1:1 manner on top of a source, or vice-versa), and all protocol layers that are represented by a given ifTable entry are expected to have the same directionality (i.e., instances of optIfOTSnDirectionality and optIfOMSnDirectionality that correspond to a given ifIndex value must have the same value, and instances of optIfOChDirectionality, optIfOTUkDirectionality, and optIfODUkDirectionality that correspond to a given ifIndex value must have the same value).

When separate ifTable entries are used for the source and sink functions of a given physical interface, association between the two uni-directional ifTable entries (one for the source function and the other for the sink functions) should be provided. It is recommended that identical ifName values are used for the two ifTable entries to indicate such association. An implementation shall explicitly state what mechanism is used to indicate the association, if ifName is not used.

Example 1: Management of unterminated opticalChannel (och) using passive optics

An OTN device connected with two adjacent nodes in a single fiber ring that supports 10 wavelengths per fiber would have 2 opticalTransport IfEntries and 20 opticalChannel IfEntries, as depicted in Figure 3. Thus 10 opticalChannel IfEntries are stacked above the first opticalTransport IfEntry, and the other 10 opticalChannel IfEntries are stacked above the second
opticalTransport IfEntry. Note that the optical channels in this example are un-terminated, and thus no OTUk objects will be instantiated for these optical channels. The opticalChannel IfEntries of one otn may be dropped/added from/to the OTN device or cross-connected with the opticalChannel IfEntries of the other otn. Cross-connection from a member of the first 10
opticalChannel IfEntries to a member of the second 10
opticalChannel IfEntries could be modelled by using a cross- connect object, which is not yet defined in this version of the MIB.


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    ______________________                      ______________________
   |       |      |       |                    |       |      |       |
   | och1  | ...  | och10 |                    | och11 | ...  | och20 |
   |_______|______|_______|                    |_______|______|_______|
   |                      |                    |                      |
   |         otn1         |                    |         otn2         |
   |______________________|                    |______________________|
                               ____________
                              |            |
          ___________________\|    OTN     |__________________\
                             /|   device   |                  /
                              |____________|

Figure 3: Interface stacks when channels are unterminated

Example 2: Management of terminated opticalChannel (och) interfaces

An OTN device connected with two adjacent nodes in a single fiber ring that supports 10 wavelengths per fiber would have 2 opticalTransport IfEntries and 20 opticalChannel IfEntries, as depicted in Figure 4. Thus 10 opticalChannel IfEntries are stacked above the first opticalTransport IfEntry, and the other 10 opticalChannel IfEntries are stacked above the second
opticalTransport IfEntry. As the optical channels in this example are terminated, OTUk objects and possibly ODUk objects will be instantiated for the terminated opticalChannel IfEntries.

    ______________________                      ______________________
   |       |      |       |                    |       |      |       |
   | och1  | ...  | och10 |                    | och11 | ...  | och20 |
   |_______|______|_______|                    |_______|______|_______|
   |                      |                    |                      |
   |         otn1         |                    |         otn2         |
   |______________________|                    |______________________|
                               ____________
                              |            |
          ___________________\|    OTN     |__________________\
                             /|   device   |                  /
                              |____________|

Figure 4: Interface stacks when channels are terminated

Note that the two examples described above depict the interface stacks when the banded configuration is not modeled.


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The exact configuration and multiplexing of the layers is maintained in the ifStackTable (RFC 2863) [RFC2863] and in the ifInvStackTable (RFC 2864) [RFC2864]; see section 2.5 for details.

2.2 Use of ifTable for OTN OTS/OMS Layer

Only the ifGeneralInformationGroup needs to be supported.

   ifTable Object      Use for combined OTN OTS/OMS Layer
   =====================================================================
    ifIndex             The interface index.

    ifDescr             Optical Transport Network (OTN) Optical
                        Transmission Section (OTS)/Optical Multiplex
                        Section (OMS)

    ifType              opticalTransport (196)

    ifSpeed             Actual bandwidth of the interface in bits per
                        second.  If the bandwidth of the interface is
                        greater than the maximum value of 4,294,967,295,
                        then the maximum value is reported and
                        ifHighSpeed must be used to report the
                        interface's speed.

    ifPhysAddress       An octet string with zero length.  (There is
                        no specific address associated with the
                        interface.)

    ifAdminStatus       The desired administrative status of the
                        interface.  Supports read-only access.

    ifOperStatus        The operational status of the interface.  The
                        value lowerLayerDown(7) is not used, since
                        there is no lower layer interface.  This object
                        is set to notPresent(6) if a component is
                        missing, otherwise it is set to down(2) if
                        either of the objects optIfOTSnCurrentStatus or
                        optIfOMSnCurrentStatus indicates that any
                        defect is present.

    ifLastChange        The value of sysUpTime at the last change in
                        ifOperStatus.


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    ifName              Enterprise-specific convention (e.g., TL-1 AID)
                        to identify the physical or data entity
                        associated with this interface or an
                        OCTET STRING of zero length.  The
                        enterprise-specific convention is intended to
                        provide the means to reference one or more
                        enterprise-specific tables.

ifLinkUpDownTrapEnable Default value is enabled(1). Supports read-only access.

    ifHighSpeed         Actual bandwidth of the interface in Mega-bits
                        per second.  A value of n represents a range of
                        'n-0.5' to 'n+0.499999'.

ifConnectorPresent Set to true(1).

    ifAlias             The (non-volatile) alias name for this interface
                        as assigned by the network manager.

2.3 Use of ifTable for OTN OChGroup Layer

Only the ifGeneralInformationGroup needs to be supported.

   ifTable Object      Use for OTN OChGroup Layer
   =====================================================================
    ifIndex             The interface index.

    ifDescr             Optical Transport Network (OTN) Optical
                        Channel Group (OChGroup)

    ifType              opticalChannelGroup(219)

    ifSpeed             Current bandwidth of the interface in bits per
                        second.  If the bandwidth of the interface is
                        greater than the maximum value of 4,294,967,295,
                        then the maximum value is reported and
                        ifHighSpeed must be used to report the
                        interface's speed.

    ifPhysAddress       A string that specifies the range of wavelengths
                        in the format of w1-w2, where w1 and w2 are the
                        lower and upper end of the wavelength range,
                        both in ASCII decimal digits expressed in
                        nanometers (e.g., 1350-1650)


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    ifAdminStatus       The desired administrative status of the
                        interface.  Supports read-only access.

    ifOperStatus        The operational status of the interface.  This
                        object is set to lowerLayerDown(7) if the
                        ifOperStatus of its otn interface is down(2).
                        Otherwise, it is set to down(2) if the
                        amplifier for this band is unable to carry
                        traffic.

    ifLastChange        The value of sysUpTime at the last change in
                        ifOperStatus.

    ifName              Enterprise-specific convention (e.g., TL-1 AID)
                        to identify the physical or data entity
                        associated with this interface or an
                        OCTET STRING of zero length.  The
                        enterprise-specific convention is
                        intended to provide the means to reference one
                        or more enterprise-specific tables.

ifLinkUpDownTrapEnable Default value is disabled(2). Supports read-only access.

    ifHighSpeed         Current bandwidth of the interface in Mega-bits
                        per second.  A value of n represents a range of
                        'n-0.5' to 'n+0.499999'.

ifConnectorPresent Set to false(2).

    ifAlias             The (non-volatile) alias name for this interface
                        as assigned by the network manager.

2.4 Use of ifTable for OTN OCh Layer

Only the ifGeneralInformationGroup needs to be supported.

   ifTable Object      Use for OTN OCh Layer
   =====================================================================
    ifIndex             The interface index.

    ifDescr             Optical Transport Network (OTN) Optical
                        Channel (OCh)

    ifType              opticalChannel(195)


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    ifSpeed             Current bandwidth of the interface in bits per
                        second.  If the bandwidth of the interface is
                        greater than the maximum value of 4,294,967,295,
                        then the maximum value is reported and
                        ifHighSpeed must be used to report the
                        interface's speed.

    ifPhysAddress       A string of ASCII decimal digits containing the
                        wavelength of the optical channel, expressed
                        in nanometers (e.g., 1550).

    ifAdminStatus       The desired administrative status of the
                        interface.  Supports read-only access.

    ifOperStatus        The operational status of the interface.  This
                        object is set to lowerLayerDown(7) if the
                        ifOperStatus of its otn interface or of its
                        OChGroup interface is down(2).
                        Otherwise, it is set to down(2) if one or more
                        of the objects optIfOChCurrentStatus,
                        optIfOTUkCurrentStatus, optIfODUkTCurrentStatus,
                        and optIfODUkTtpCurrentStatus indicates
                        that any defect is present.

    ifLastChange        The value of sysUpTime at the last change in
                        ifOperStatus.

    ifName              Enterprise-specific convention (e.g., TL-1 AID)
                        to identify the physical or data entity
                        associated with this interface or an
                        OCTET STRING of zero length.  The
                        enterprise-specific convention is
                        intended to provide the means to reference one
                        or more enterprise-specific tables.

ifLinkUpDownTrapEnable Default value is disabled(2). Supports read-only access.

    ifHighSpeed         Current bandwidth of the interface in Mega-bits
                        per second.  A value of n represents a range of
                        'n-0.5' to 'n+0.499999'.

ifConnectorPresent Set to false(2).

    ifAlias             The (non-volatile) alias name for this interface
                        as assigned by the network manager.


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2.5 Use of ifStackTable

Use of the ifStackTable and ifInvStackTable to associate the opticalTransport and opticalChannel interface entries is best illustrated by the example shown in Figure 5. The example assumes an otn interface with ifIndex i that carries two multiplexed och interfaces with ifIndex values of j and k, respectively. The example shows that j and k are stacked above (i.e., multiplexed into) i. Furthermore, it shows that there is no layer lower than i and no layer higher than j and/or k.

                     HigherLayer   LowerLayer
                    --------------------------
                         0             j
                         0             k
                         j             i
                         k             i
                         i             0

Figure 5: Use of ifStackTable for an OTN port

Figure 6 illustrates an example for a banded configuration. The example assumes an otn interface with ifIndex i that carries two multiplexed och groups with ifIndex values u and v. An och group with ifIndex value u combines two och interfaces with ifIndex values of a and b. An och group with ifIndex value v combines two och interfaces with ifIndex values of c and d. The example show that a and b are stacked above (i.e., multiplexed into) u. Likewise, c and d are stacked above v. u and v are multiplexed into i. Furthermore, it shows that there is no layer lower than i and no layer higher than a, b, c, and/or d. It also shows that u has a and b as its higher layers, and v has c and d as its higher layers.

                     HigherLayer   LowerLayer
                    --------------------------
                         0             a
                         0             b
                         0             c
                         0             d
                         a             u
                         b             u
                         c             v
                         d             v
                         u             i
                         v             i
                         i             0

Figure 6: Use of ifStackTable for an OTN port for a banded configuration


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For the inverse stack table, it provides the same information as the interface stack table, with the order of the Higher and Lower layer interfaces reversed.

2.6 Optical Network Terminology

The terminology used in this document to describe the layers of an optical network and the error conditions and performance monitoring parameters on an optical circuit as monitored by an optical system is listed below. These terms are defined in ITU-T Recommendations G.872 [ITU-T G.872], G.709 [ITU-T G.709], G.798 [ITU-T G.798], G.874 [ITU-T G.874], G.874.1 [ITU-T G.874.1], and G.806 [ITU-T G.806]. Brief definitions of some terms are also included here to facilitate the readability of this document.

Degraded Threshold (DEGTHR) - G.806
A threshold level for declaring a performance monitoring (PM) Second (a time period of one second) to be bad. A PM Second is declared bad if the percentage of detected errored blocks in that second or the number of errored blocks in that Second is greater than or equal to DEGTHR.

DEGM - G.806
A threshold level for declaring a Degraded Signal defect (dDEG). A dDEG shall be declared if DEGM consecutive bad PM Seconds are detected.

Expected Destination Access Point Identifier (ExDAPI) - G.798 The Expected Destination Access Point Identifier (ExDAPI), provisioned by the managing system, to be compared with the TTI accepted at the overhead position of the sink for the purpose of checking the integrity of connectivity.

Expected Source Access Point Identifier (ExSAPI) - G.798
The Expected Source Access Point Identifier (ExSAPI), provisioned by the managing system, to be compared with the TTI accepted at the overhead position of the sink for the purpose of checking the integrity of connectivity.

Inter-Domain Interface (IrDI) - G.872
A physical interface that represents the boundary between two administrative domains.

G.709 defines the requirements for the IrDI at the Network Node
Interface (NNI).

Intra-Domain Interface (IaDI) - G.872
A physical interface within an administrative domain.


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Optical Channel Layer Network (OCh) - G.872
This layer network provides end-to-end networking of optical channels for transparently conveying client information of varying format (e.g., SDH STM-N, PDH 565 Mbit/s, cell based ATM, etc.).

Optical Channel Data Unit Path Layer Network (ODUk) - G.709/Y.1331 This layer network provides functionality for the transport of information structure consisting of the information payload (OPUk) and the related overhead for management of an optical channel.

Optical Channel Data Unit Tandem Connection Sub-Layer Network (ODUkT)

   - G.709/Y.1331
         This layer network is a sub-layer of the optical data unit
         layer, which provides the capability for tandem connection
         monitoring.  One to six nested levels of monitoring are defined
         for OTN.

Optical Channel Payload Unit (OPUk) - G.709/Y.1331
The OPUk is the information structure used to adapt client information for transport over an optical channel. OPUk capacities for k=1, k=2, k=3 are defined in ITU-T. The index "k" is used to represent different versions of OPUk, ODUk and OTUk. k=1 represents an approximate bit rate of 2.5 Gbit/s, k=2 represents an approximate bit rate of 10 Gbit/s, and k=3 represents an approximate bit rate of 40 Gbit/s.

Optical Multiplex Section Layer Network (OMS) - G.872
This layer network provides functionality for networking of a multi-wavelength optical signal. Note that a "multi- wavelength" signal includes the case of just one optical channel.

Optical Transport Module (OTM-n[r].m) - G.872
The OTM is the information structure that is transported across an ONNI. The index n and m define the number of supported wavelengths and bit rates at the interface.

Two OTM structures are defined: OTM with full functionality (OTM-n.m) and OTM with reduced functionality (OTM-0.m & OTM- nr.m).

The OTM-n.m consists of up to n multiplexed optical channels and an OTM overhead signal to support the non-associated overhead. The OTM-0 consists of a single optical channel


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without a specific color assigned. The OTM-nr.m consists of up to n multiplexed optical channels. Non associated overhead is not supported.

Optical Transport Network (OTN) - G.872
A transport network bounded by optical channel access points. The optical transport network layered structure is comprised of the optical channel, optical multiplex section and optical transmission section layer networks.

According to G.872, an OTN-compliant interface is an interface of the optical transport network based on the architecture defined in G.872, while an OTN-non-compliant interface is an interface that does not comply with the interface
recommendations that will be defined for the optical transport network based on the architecture defined in G.872.

Optical Transmission Section Layer Network (OTS) - G.872
This layer network provides functionality for transmission of optical signals on optical media of various types.

Optical Channel Transport Unit Section Layer Network (OTUk) - G.709 The OTUk is the layer network that provides for the transport of an ODUk over one or more optical channel link connections. It consists of the optical channel data unit and OTUk related overhead (FEC and overhead for management of an optical channel link connection). It is characterized by its frame structure, bit rate, and bandwidth.

Payload Type Mismatch (PLM)
The detection of a mismatch of payload type is based on a comparison between the expected Payload Type signal, provisioned via the management interface, and the received Payload Type signal.

Trail Trace Identifier Transmitted (TxTI) - G.798
The Trail Trace Identifier (TTI) information, provisioned by the managing system, to be placed in the TTI overhead position of the source of a trail for transmission.

Trail Trace Identifier Accepted (AcTI) - G.798
The Trail Trace Identifier (TTI) information accepted from the TTI overhead position at the sink of a trail.

Trail Trace Identifier Accepted Status (AcTIStatus) - G.798 The Status of the Trail Trace Identifier (TTI) accepted from the TTI overhead position at the sink of a trail.


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Trace Identifier Mismatch (TIM) - G.798
The detection of TIM is based on a comparison between the expected Trial Trace Identifier (TTI), configured via the management interface, and the received TTI.

Trace Identifier Mismatch Consequent Action Enabled (TimActEnabled) - G.798
The Consequent Action function of TIM is disabled.

Trace Identifier Mismatch Detection Mode (TimDetMode) - G.798 The mode of detecting Trace Identifier Mismatch (TIM). Possible modes are:

(1) off - no checking,
(2) SAPI - checking the SAPI only,
(3) DAPI - checking the DAPI only, and
(4) Both - checking both the SAPI and DAPI.

2.6.1 Defect Conditions

The following Defect conditions are defined in G.798 (as fault cause) for OTN monitoring.

   ais          Alarm Indication Signal (AIS)
   bdi          Backward Defect Indication (BDI)
   bdiO         Backward Defect Indication - Overhead (BDI-O)
   bdiP         Backward Defect Indication - Payload (BDI-P)
   deg          Degraded (DEG)
   lck          Locked (LCK)
   lof          Loss of Frame (LOF)
   lom          Loss of Multi Frame
   los          Loss of Signal (LOS)
   losO         Loss of Signal - Overhead (LOS-O)
   losP         Loss of Signal - Payload (LOS-P)
   oci          Open Connection Indication (OCI)
   plm          Payload Mismatch (PLM)
   ssf          Server Signal Failure (SSF)
   ssfO         Server Signal Failure - Overhead (SSF-O)
   ssfP         Server Signal Failure - Payload (SSF-P)
   tim          Trace Identifier Mismatch (TIM)

The relationship of these conditions within a network layer and between layers are described in G.798 [ITU-T G.798].


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2.6.2 Performance Parameters

To facilitate identification of equipment and facilities that may require maintenance, it is necessary to monitor parameters such as optical power at each layer. The measurements are taken
periodically, and a snapshot of the current value is also made available. More specifically, performance parameters at each layer are maintained for the current 15-minute interval, the current 24- hour interval, N previous 15-minute intervals where 4 <= N <= 96, and one previous 24-hour interval.

Note that some of the previous interval data will be unavailable if the agent has restarted within the last 24 hours.

There is no requirement for an agent to ensure a fixed relationship between the start of a 15-minute or 24-hour interval and any wall clock; however, some agents may align the 15-minute intervals with quarter hours and may align the 24-hour intervals with a particular hour of the day (e.g., 00:00 UTC).

Note that some DWDM systems may also monitor the laser temperature of the equipment in addition to monitoring the optical power. However, industry opinions vary widely with respect to laser temperature monitoring, in particular regarding the benefit of the monitoring and which temperatures are to be monitored (i.e., all or only some of the pump lasers). Similarly, there are varying opinions regarding mid- stage power monitoring. Since no consensus was reached, it was decided that the laser temperature monitoring and mid-stage monitoring would not be standardized in the MIB. If an
implementation would like to monitor these parameters, one could use a proprietary MIB or the ENTITY-SENSOR-MIB [RFC3433] to capture this information.


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The sink-side monitoring points for the various layers are shown in Figure 7 below.

OCh sink pre-OTN PM params

         |
         |    OChGroup sink pre-OTN params
         |        |
         |        |               OMSn sink pre-OTN PM params
         |        |                    |
         |        |                    |     OTSn sink pre-OTN PM params
         |        |                    |                   |
         V        V                    V                   V
                                                          /|
    ____/|_______/|                   /|                 / |
        \| .    / |__________________/ |________________/  |_____
           .    \ |              ____\ |                \  |
    ____/|_______\|             |     \|              ___\ |
        \|      C-Band          |   Demux            |    \|
                                |                    |
                                |                    |
    ____/|_______/|             |                   OSC
        \| .    / |_____________|
           .    \ |
    ____/|_______\|
        \|     L-Band

   optical     optical              optical       OSC Drop Filter
   rcvr (O/E)  demux                demux

       OCh      OChGroup             OMSn               OTSn

Figure 7: Sink-side pre-OTN monitoring points


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The source-side monitoring points for the various layers are shown in Figure 8 below.

OCh src pre-OTN PM params

        |
        |    OChGroup src pre-OTN PM params
        |       |
        |       |            OMSn src pre-OTN PM params
        |       |                  |
        |       |                  |          OTSn src pre-OTN PM params
        |       |                  |                |
        V       V                  V                V
                                                    |\
    ___|\______|\                  |\               | \
       |/    . | \_________________| \______________|  \______
             . | /              ___| /              |  /
           ----|/              |   |/             __| /
          C-Band MUX           |   Mux           |  |/
                               |                 |
                               |                OSC
    ___|\______|\              |
       |/    . | \_____________|
             . | /
           ----|/
          L-Band MUX

    optical  optical             optical      OSC Add Filter
    xmtr     mux                 mux
    (E/O)

     OCh     OChGroup              OMSn             OTSn

Figure 8: Source-side pre-OTN monitoring points

Note that optical performance parameters are of type Integer32, rather than Counter32 or Gauge32, because it is possible for these objects to increase or decrease and to assume negative or positive values.


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2.7 Tandem Connection Monitoring (TCM)

An ODUk termination can be provisioned to support (0..6) TCM levels. Each TCM field contains the following subfields:

      -  Trail Trace Identifier (TTI)
      -  Bit Interleaved Parity 8 (BIP8)
      -  Backward Defect Indication (BDI)
      -  Backward Error Indication (BEI)
      -  Status bits indicating the presence of TCM overhead, Incoming
         AlignmentError, or a maintenance signal (STAT).

The insertion of these subfields is controlled by:

      -  optIfODUkTSourceMode or otnODUkTsinkMode

The detection and corresponding action of these subfields are controlled by:

      -  optIfODUkTTimDetMode
      -  optIfODUkTTimActEnabled

The TCM connection is used for monitoring the quality of an end to end connection or any segment, as illustrated in the example:

TCM1 used for the end-to-end connection from A1 to A2. TCM2 used for segment B1-B2, then used again for segment B3-B4. TCM3-TCM6 these bytes are not in used in this example.


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The TCM connection can be nested (B1-B2 is nested in A1-A2) or cascaded (B1-B2 and B3-B4).

          ______     ______     ______     ______     ______
          |TCM6|     |TCM6|     |TCM6|     |TCM6|     |TCM6|
          |----|     |----|     |----|     |----|     |----|
          |TCM5|     |TCM5|     |TCM5|     |TCM5|     |TCM5|
          |----|     |----|     |----|     |----|     |----|
          |TCM4|     |TCM4|     |TCM4|     |TCM4|     |TCM4|
          |----|     |----|     |----|     |----|     |----|
          |TCM3|     |TCM3|     |TCM3|     |TCM3|     |TCM3|
          |----|     |----|     |----|     |----|     |----|
          |TCM2|     |TCM2|     |TCM2|     |TCM2|     |TCM2|
          |----|     |----|     |----|     |----|     |----|
          |TCM1|     |TCM1|     |TCM1|     |TCM1|     |TCM1|
          |----|     |----|     |----|     |----|     |----|
             |         |          |          |           |
             |         |          |          |           |
             |         |          |          |           |
             |         |          |          |           |
             |         |          |          |           |
         |\         |\         /|         |\         /|        /|
   ----> | \________| \_______/ |_________| \_____  / |______ / | ---->
         | /        | /       \ |         | /       \ |       \ |
         |/         |/         \|         |/         \|        \|

TCM1: A1 <------------------------------------------------> A2

   TCM2:            B1 <-----> B2         B3 <-----> B4

3 Structure of the MIB

The managed Optical Networking interface objects are arranged into the following groups of tables:

The optIfOTMn group handles the OTM information structure of an optical interface.

optIfOTMnTable

The optIfPerfMon group handles the current 15-minute and 24-hour interval elapsed time, as well as the number of 15-minute intervals for all layers.

optIfPerfMonIntervalTable


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The optIfOTSn groups handle the configuration and performance monitoring information for OTS layers.

optIfOTSnConfigTable
optIfOTSnSinkCurrentTable
optIfOTSnSinkIntervalTable
optIfOTSnSinkCurDayTable
optIfOTSnSinkPrevDayTable
optIfOTSnSrcCurrentTable
optIfOTSnSrcIntervalTable
optIfOTSnSrcCurDayTable
optIfOTSnSrcPrevDayTable

The optIfOMSn groups handle the configuration and performance information for OMS layers.

optIfOMSnConfigTable
optIfOMSnSinkCurrentTable
optIfOMSnSinkIntervalTable
optIfOMSnSinkCurDayTable
optIfOMSnSinkPrevDayTable
optIfOMSnSrcCurrentTable
optIfOMSnSrcIntervalTable
optIfOMSnSrcCurDayTable
optIfOMSnSrcPrevDayTable

The optIfOChGroup groups handle the configuration and performance information for OChGroup layers.

optIfOChGroupConfigTable
optIfOChGroupSinkCurrentTable
optIfOChGroupSinkIntervalTable
optIfOChGroupSinkCurDayTable
optIfOChGroupSinkPrevDayTable
optIfOChGroupSrcCurrentTable
optIfOChGroupSrcIntervalTable
optIfOChGroupSrcCurDayTable
optIfOChGroupSrcPrevDayTable


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The optIfOCh groups handle the configuration and performance monitoring information for OCh layers.

optIfOChConfigTable
optIfOChSinkCurrentTable
optIfOChSinkIntervalTable
optIfOChSinkCurDayTable
optIfOChSinkPrevDayTable
optIfOChSrcCurrentTable
optIfOChSrcIntervalTable
optIfOChSrcCurDayTable
optIfOChSrcPrevDayTable

The optIfOTUk groups handle configuration information for OTUk.

optIfOTUkConfigTable
optIfGCC0ConfigTable

The optIfODUk groups handle configuration information for ODUk.

optIfODUkConfigTable
optIfODUkTtpConfigTable
optIfODUkPositionSeqTable
optIfODUkNimConfigTable
optIfGCC12ConfigTable

The optIfODUkT groups handle configuration information for ODUkT.

optIfODUkTConfigTable
optIfODUkTNimConfigTable

This memo does not define MIB objects for optical system cross- connects. After a consensus is reached on definitions of the interface MIB objects for optical systems (resulting from resolution of discussions on the objects proposed in this memo), work can progress on the definitions of tables to represent cross-connects (e.g., OCh optical cross-connects and ODUk electrical cross- connects).

3.1 The optIfOTMn group

3.1.1 optIfOTMnTable

This table contains the OTM structure information of an optical interface.


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3.2 The optIfPerfMon group

3.2.1 optIf Performance Monitoring Interval Table

This table applies to all performance monitoring on an NE. It records on a per-interface basis the elapsed time in the current 15- minute and 24-hour interval, as well as the total number of 15-minute intervals and the number of invalid 15-minute intervals.

3.3 The optIfOTSn groups

3.3.1 optIfOTSn Configuration group

3.3.1.1 optIfOTSn Configuration Table

This table contains information on configuration of optIfOTSn interfaces, in addition to the information on such interfaces contained in the ifTable.

3.3.2 optIfOTSn Pre-OTN PM group

3.3.2.1 optIfOTSn Source Current Table

This table contains information on current performance of optIfOTSn interfaces contained in the ifTable.

3.3.2.2 optIfOTSn Source Interval Table

This table contains information on historic performance of optIfOTSn interfaces contained in the ifTable.

3.3.2.3 optIfOTSn Source Current Day Table

This table contains a snapshot of information for the current 24-hour period for optIfOTSn interfaces contained in the ifTable.

3.3.2.4 optIfOTSn Source Previous Day Table

This table contains a snapshot of information for the previous 24- hour period for optIfOTSn interfaces contained in the ifTable.

3.3.2.5 optIfOTSn Sink Current Table

This table contains information on current performance of optIfOTSn interfaces contained in the ifTable.


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3.3.2.6 optIfOTSn Sink Interval Table

This table contains information on historic performance of optIfOTSn interfaces contained in the ifTable.

3.3.2.7 optIfOTSn Sink Current Day Table

This table contains a snapshot of information for the current 24-hour period for optIfOTSn interfaces contained in the ifTable.

3.3.2.8 optIfOTSn Sink Previous Day Table

This table contains a snapshot of information for the previous 24- hour period for optIfOTSn interfaces contained in the ifTable.

3.4 The optIfOMSn groups

3.4.1 optIfOMSn Configuration group

3.4.1.1 optIfOMSn Configuration Table

This table contains information on configuration of optIfOMSn interfaces, in addition to the information on such interfaces contained in the ifTable.

3.4.2 optIfOMSn Pre-OTN PM group

3.4.2.1 optIfOMSn Source Current Table

This table contains information on current performance of optIfOMSn interfaces contained in the ifTable.

3.4.2.2 optIfOMSn Source Interval Table

This table contains information on historic performance of optIfOMSn interfaces contained in the ifTable.

3.4.2.3 optIfOMSn Source Current Day Table

This table contains a snapshot of information for the current 24-hour period for optIfOMSn interfaces contained in the ifTable.

3.4.2.4 optIfOMSn Source Previous Day Table

This table contains a snapshot of information for the previous 24- hour period for optIfOMSn interfaces contained in the ifTable.


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3.4.2.5 optIfOMSn Sink Current Table

This table contains information on current performance of optIfOMSn interfaces contained in the ifTable.

3.4.2.6 optIfOMSn Sink Interval Table

This table contains information on historic performance of optIfOMSn interfaces contained in the ifTable.

3.4.2.7 optIfOMSn Sink Current Day Table

This table contains a snapshot of information for the current 24-hour period for optIfOMSn interfaces contained in the ifTable.

3.4.2.8 optIfOMSn Sink Previous Day Table

This table contains a snapshot of information for the previous 24- hour period for optIfOMSn interfaces contained in the ifTable.

3.5 The optIfOChGroup groups

3.5.1 optIfOChGroup Configuration group

3.5.1.1 optIfOChGroup Configuration Table

This table contains information on configuration of optIfOChGroup interfaces, in addition to the information on such interfaces contained in the ifTable.

3.5.2 optIfOChGroup Pre-OTN PM group

3.5.2.1 optIfOChGroup Source Current Table

This table contains information on current performance of optIfOChGroup interfaces contained in the ifTable.

3.5.2.2 optIfOChGroup Source Interval Table

This table contains information on historic performance of optIfOChGroup interfaces contained in the ifTable.

3.5.2.3 optIfOChGroup Source Current Day Table

This table contains a snapshot of information for the current 24-hour period for optIfOChGroup interfaces contained in the ifTable.


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3.5.2.4 optIfOChGroup Source Previous Day Table

This table contains a snapshot of information for the previous 24- hour period for optIfOChGroup interfaces contained in the ifTable.

3.5.2.5 optIfOChGroup Sink Current Table

This table contains information on current performance of optIfOChGroup interfaces contained in the ifTable.

3.5.2.6 optIfOChGroup Sink Interval Table

This table contains information on historic performance of optIfOChGroup interfaces contained in the ifTable.

3.5.2.7 optIfOChGroup Sink Current Day Table

This table contains a snapshot of information for the current 24-hour period for optIfOChGroup interfaces contained in the ifTable.

3.5.2.8 optIfOChGroup Sink Previous Day Table

This table contains a snapshot of information for the previous 24- hour period for optIfOChGroup interfaces contained in the ifTable.

3.6 The optIfOCh groups

3.6.1 optIfOCh Configuration group

3.6.1.1 optIfOCh Configuration Table

This table contains information on configuration of optIfOCh interfaces, in addition to the information on such interfaces contained in the ifTable.

3.6.2 optIfOCh Pre-OTN PM group

3.6.2.1 optIfOCh Source Current Table

This table contains information on current performance of optIfOCh interfaces contained in the ifTable.

3.6.2.2 optIfOCh Source Interval Table

This table contains information on historic performance of optIfOCh interfaces contained in the ifTable.


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3.6.2.3 optIfOCh Source Current Day Table

This table contains a snapshot of information for the current 24-hour period for optIfOCh interfaces contained in the ifTable.

3.6.2.4 optIfOCh Source Previous Day Table

This table contains a snapshot of information for the previous 24- hour period for optIfOCh interfaces contained in the ifTable.

3.6.2.5 optIfOCh Sink Current Table

This table contains information on current performance of optIfOCh interfaces contained in the ifTable.

3.6.2.6 optIfOCh Sink Interval Table

This table contains information on historic performance of optIfOCh interfaces contained in the ifTable.

3.6.2.7 optIfOCh Sink Current Day Table

This table contains a snapshot of information for the current 24-hour period for optIfOCh interfaces contained in the ifTable.

3.6.2.8 optIfOCh Sink Previous Day Table

This table contains a snapshot of information for the previous 24- hour period for optIfOCh interfaces contained in the ifTable.

3.7 The optIfOTUk groups

3.7.1 optIfOTUk Configuration group

3.7.1.1 optIfOTUk Configuration Table

This table contains information on configuration of optIfOTUk interfaces, in addition to the information on such interfaces contained in the ifTable.

3.7.2 optIfGCC0 Configuration group

3.7.2.1 optIfGCC0 Configuration Table

This table contains information on configuration of the GCC0 communication channel.


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3.8 The optIfODUk groups

3.8.1 optIfODUk Configuration group

3.8.1.1 optIfODUk Configuration Table

This table contains all the objects that are common to endpoints (called trail termination points or TTPs) and connection termination points (CTPs), and also includes a flag stating whether TTP functions are present.

3.8.2 optIfODUkTtp Configuration group

3.8.2.1 optIfODUkTtp Configuration Table

This table contains TTP-specific information on configuration of optIfODUk interfaces, in addition to the information on such interfaces contained in the ifTable.

3.8.3 optIfODUk Position Seq group

3.8.3.1 optIfODUk Position Seq Table

This table contains information on the position sequence of the TCM function and/or GCC12 access that have been created within the optIfODUk interfaces, in addition to the information on such interfaces contained in the ifTable.

3.8.4 optIfODUk Nim Configuration group

3.8.4.1 optIfODUk Nim Configuration Table

This table contains information on configuration of optIfODUk Non- intrusive monitoring.

3.8.5 optIfGCC12 Configuration group

3.8.5.1 optIfGCC12 Configuration Table

This table contains information on configuration of the GCC1 and GCC2 communication channels.


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3.9 The optIfODUkT groups

3.9.1 optIfODUkT Configuration group

3.9.1.1 optIfODUkT Configuration Table

This table contains information on configuration of optIfODUkT interfaces, in addition to the information on such interfaces contained in the ifTable.

3.9.2 optIfODUkT Nim Configuration group

3.9.2.1 optIfODUkT Nim Configuration Table

This table contains information on configuration of optIfODUkT Non- intrusive monitoring.

4 Object Definitions

OPT-IF-MIB DEFINITIONS ::= BEGIN

IMPORTS
MODULE-IDENTITY, OBJECT-TYPE, Gauge32, Integer32,
Unsigned32, transmission
FROM SNMPv2-SMI
TEXTUAL-CONVENTION, RowPointer, RowStatus, TruthValue
FROM SNMPv2-TC
SnmpAdminString
FROM SNMP-FRAMEWORK-MIB
MODULE-COMPLIANCE, OBJECT-GROUP
FROM SNMPv2-CONF
ifIndex
FROM IF-MIB;

--  This is the MIB module for the OTN Interface objects.

optIfMibModule MODULE-IDENTITY
LAST-UPDATED "200308130000Z"
ORGANIZATION "IETF AToM MIB Working Group"
CONTACT-INFO
"WG charter:
http://www.ietf.org/html.charters/atommib-charter.html

Mailing Lists:
General Discussion: atommib@research.telcordia.com To Subscribe: atommib-request@research.telcordia.com


Page 31

Editor: Hing-Kam Lam
Postal: Lucent Technologies, Room 4C-616
101 Crawfords Corner Road
Holmdel, NJ 07733
Tel: +1 732 949 8338
Email: hklam@lucent.com"
DESCRIPTION
"The MIB module to describe pre-OTN and OTN interfaces.

Copyright © The Internet Society (2003). This version of this MIB module is part of RFC 3591; see the RFC itself for full legal notices."
REVISION "200308130000Z"
DESCRIPTION
"Initial version, published as RFC 3591."

    ::={ transmission 133 }

-- textual conventions

OptIfAcTI ::= TEXTUAL-CONVENTION
  STATUS  current
  DESCRIPTION
    "The trace identifier (TI) accepted at the receiver."
  SYNTAX  OCTET STRING (SIZE(64))

OptIfBitRateK ::= TEXTUAL-CONVENTION
  STATUS  current
  DESCRIPTION
    "Indicates the index 'k' that is used to
     represent a supported bit rate and the different
     versions of OPUk, ODUk and OTUk.
     Allowed values of k are defined in ITU-T G.709.
     Currently allowed values in G.709 are:
        k=1 represents an approximate bit rate of 2.5 Gbit/s,
        k=2 represents an approximate bit rate of 10 Gbit/s,
        k=3 represents an approximate bit rate of 40 Gbit/s."
  SYNTAX  Integer32

OptIfDEGM ::= TEXTUAL-CONVENTION
  STATUS  current
  DESCRIPTION
    "Indicates the threshold level for declaring a Degraded Signal
     defect (dDEG).  A dDEG shall be declared if OptIfDEGM
     consecutive bad PM Seconds are detected."
  SYNTAX  Unsigned32 (2..10)


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OptIfDEGThr ::= TEXTUAL-CONVENTION
  STATUS  current
  DESCRIPTION
    "Indicates the threshold level for declaring a performance
     monitoring (PM) Second to be bad.  A PM Second is declared bad if
     the percentage of detected errored blocks in that second is
     greater than or equal to OptIfDEGThr."
  SYNTAX  Unsigned32 (1..100)

OptIfDirectionality ::= TEXTUAL-CONVENTION
  STATUS  current
  DESCRIPTION
    "Indicates the directionality of an entity."
  SYNTAX  INTEGER {
    sink(1),
    source(2),
    bidirectional(3)
    }

OptIfSinkOrSource ::= TEXTUAL-CONVENTION
  STATUS  current
  DESCRIPTION
    "Indicates the directionality of an entity
     that is allowed only to be a source or sink."
  SYNTAX  INTEGER {
    sink(1),
    source(2)
    }

OptIfExDAPI ::= TEXTUAL-CONVENTION
  STATUS  current
  DESCRIPTION
    "The Destination Access Point Identifier (DAPI)
     expected by the receiver."
  SYNTAX  OCTET STRING (SIZE(16))

OptIfExSAPI ::= TEXTUAL-CONVENTION
  STATUS  current
  DESCRIPTION
    "The Source Access Point Identifier (SAPI)
     expected by the receiver."
  SYNTAX  OCTET STRING (SIZE(16))

OptIfIntervalNumber ::= TEXTUAL-CONVENTION
  STATUS  current
  DESCRIPTION
    "Uniquely identifies a 15-minute interval.  The interval
     identified by 1 is the most recently completed interval, and


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the interval identified by n is the interval immediately preceding the one identified by n-1."
SYNTAX Unsigned32 (1..96)

OptIfTIMDetMode ::= TEXTUAL-CONVENTION
  STATUS  current
  DESCRIPTION
    "Indicates the mode of the Trace Identifier Mismatch (TIM)
     Detection function."
  SYNTAX  INTEGER {
    off(1),
    dapi(2),
    sapi(3),
    both(4)
    }

OptIfTxTI ::= TEXTUAL-CONVENTION
  STATUS  current
  DESCRIPTION
    "The trace identifier (TI) transmitted."
  SYNTAX  OCTET STRING (SIZE(64))

-- object groups

optIfObjects OBJECT IDENTIFIER ::= { optIfMibModule 1 }
optIfConfs OBJECT IDENTIFIER ::= { optIfMibModule 2 }

optIfOTMn OBJECT IDENTIFIER ::= { optIfObjects 1 }
optIfPerfMon OBJECT IDENTIFIER ::= { optIfObjects 2 }
optIfOTSn OBJECT IDENTIFIER ::= { optIfObjects 3 }
optIfOMSn OBJECT IDENTIFIER ::= { optIfObjects 4 }
optIfOChGroup OBJECT IDENTIFIER ::= { optIfObjects 5 }
optIfOCh OBJECT IDENTIFIER ::= { optIfObjects 6 }

optIfOTUk OBJECT IDENTIFIER ::= { optIfObjects 7 }
optIfODUk OBJECT IDENTIFIER ::= { optIfObjects 8 }
optIfODUkT OBJECT IDENTIFIER ::= { optIfObjects 9 }

optIfGroups OBJECT IDENTIFIER ::= { optIfConfs 1 }
optIfCompl OBJECT IDENTIFIER ::= { optIfConfs 2 }

-- the optIfOTMn group
-- This group defines the OTM structure information of an
-- optical interface.

-- OTMn Table

optIfOTMnTable OBJECT-TYPE


Page 34

SYNTAX SEQUENCE OF OptIfOTMnEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A table of OTMn structure information."

  ::= { optIfOTMn 1 }

optIfOTMnEntry OBJECT-TYPE
SYNTAX OptIfOTMnEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A conceptual row that contains the OTMn structure
information of an optical interface."
INDEX { ifIndex }
  ::= { optIfOTMnTable 1 }

OptIfOTMnEntry ::=
  SEQUENCE {
    optIfOTMnOrder         Unsigned32,
    optIfOTMnReduced       TruthValue,
    optIfOTMnBitRates      BITS,
    optIfOTMnInterfaceType SnmpAdminString,
    optIfOTMnTcmMax        Unsigned32,
    optIfOTMnOpticalReach  INTEGER
    }

optIfOTMnOrder OBJECT-TYPE
SYNTAX Unsigned32 (1..900)
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object indicates the order of the OTM, which
represents the maximum number of wavelengths that can be supported at the bit rate(s) supported on the interface."
  ::= { optIfOTMnEntry 1 }

optIfOTMnReduced OBJECT-TYPE
SYNTAX TruthValue
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object indicates whether a reduced or full
functionality is supported at the interface. A value of true means reduced. A value of false means full."
  ::= { optIfOTMnEntry 2 }

optIfOTMnBitRates OBJECT-TYPE


Page 35

SYNTAX BITS { bitRateK1(0), bitRateK2(1), bitRateK3(2) }
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This attribute is a bit map representing the bit
rate or set of bit rates supported on the interface.
The meaning of each bit position is as follows:
bitRateK1(0) is set if the 2.5 Gbit/s rate is supported bitRateK2(1) is set if the 10 Gbit/s rate is supported bitRateK3(2) is set if the 40 Gbit/s rate is supported Note that each bit position corresponds to one possible value of the type OptIfBitRateK.
The default value of this attribute is system specific."

  ::= { optIfOTMnEntry 3 }

optIfOTMnInterfaceType OBJECT-TYPE
SYNTAX SnmpAdminString
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object identifies the type of interface. The value of this attribute will affect the behavior of the OTM with respect to presence/absence of OTM Overhead Signal (OOS) processing and TCM activation. For an IrDI interface,
there is no OOS processing and TCM activation is limited to n levels as specified by a TCM level threshold.

This object contains two fields that are separated by
whitespace. The possible values are:
field 1: one of the 4-character ASCII strings
'IrDI' or 'IaDI'
field 2: free-form text consisting of printable
UTF-8 encoded characters

Note that field 2 is optional. If it is not present then there is no requirement for trailing whitespace after field 1.

The default values are as follows:
field 1: 'IaDI'
field 2: an empty string."

  ::= { optIfOTMnEntry 4 }

optIfOTMnTcmMax OBJECT-TYPE
SYNTAX Unsigned32 (0..6)
MAX-ACCESS read-write
STATUS current
DESCRIPTION


Page 36

"This object identifies the maximum number of TCM
levels allowed for any Optical Channel contained
in this OTM. A new TCM activation will be rejected
if the requested level is greater than the threshold.
If InterfaceType object specifies a type of 'IaDI'
for this OTM, then this attribute is irrelevant.

Possible values: unsigned integers in the range
from 0 to 6 inclusive.

     Default value:    3."

  ::= { optIfOTMnEntry 5 }

optIfOTMnOpticalReach OBJECT-TYPE
SYNTAX INTEGER { intraOffice(1), shortHaul(2), longHaul(3), veryLongHaul(4), ultraLongHaul(5) }
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object indicates the length the optical signal
may travel before requiring termination or regeneration. The meaning of the enumeration are:
intraOffice(1) - intra-office (as defined in ITU-T G.957)
       shortHaul(2)    - short haul (as defined in ITU-T G.957)
       longHaul(3)     - long haul (as defined in ITU-T G.957)
       veryLongHaul(4) - very long haul (as defined in ITU-T G.691)
       ultraLongHaul(5)- ultra long haul (as defined in ITU-T G.691)"
  ::= { optIfOTMnEntry 6 }

-- the optIfPerfMon group
-- This group defines performance monitoring objects for all
-- layers.

-- PM interval table

optIfPerfMonIntervalTable OBJECT-TYPE
SYNTAX SEQUENCE OF OptIfPerfMonIntervalEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A table of 15-minute performance monitoring interval
information."
  ::= { optIfPerfMon 1 }

optIfPerfMonIntervalEntry OBJECT-TYPE
SYNTAX OptIfPerfMonIntervalEntry
MAX-ACCESS not-accessible
STATUS current


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DESCRIPTION
"A conceptual row that contains 15-minute performance
monitoring interval information of an interface."
INDEX { ifIndex }

  ::= { optIfPerfMonIntervalTable 1 }

OptIfPerfMonIntervalEntry ::=
  SEQUENCE {
    optIfPerfMonCurrentTimeElapsed   Gauge32,
    optIfPerfMonCurDayTimeElapsed    Gauge32,
    optIfPerfMonIntervalNumIntervals         Unsigned32,
    optIfPerfMonIntervalNumInvalidIntervals  Unsigned32
    }

optIfPerfMonCurrentTimeElapsed OBJECT-TYPE
SYNTAX Gauge32 (0..900)
UNITS "seconds"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Number of seconds elapsed in the current 15-minute
performance monitoring interval.
If, for some reason, such as an adjustment in the NE's
time-of-day clock, the number of seconds elapsed exceeds the maximum value, then the maximum value will be returned."
  ::= { optIfPerfMonIntervalEntry 1 }

optIfPerfMonCurDayTimeElapsed OBJECT-TYPE
SYNTAX Gauge32 (0..86400)
UNITS "seconds"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Number of seconds elapsed in the current 24-hour interval performance monitoring period.
If, for some reason, such as an adjustment in the NE's
time-of-day clock, the number of seconds elapsed exceeds the maximum value, then the maximum value will be returned."
  ::= { optIfPerfMonIntervalEntry 2 }

optIfPerfMonIntervalNumIntervals OBJECT-TYPE
SYNTAX Unsigned32 (0..96)
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of 15-minute intervals for which performance monitoring data is available. The number is the same for all the associated sub layers of the interface.


Page 38

An optical interface must be capable of supporting at least n intervals, where n is defined as follows:
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 performance
monitoring was (re-)started for the interface within the last (n*15) minutes, in which case the value will be the number of complete 15-minute intervals since measurement was
(re-)started."

  ::= { optIfPerfMonIntervalEntry 3 }

optIfPerfMonIntervalNumInvalidIntervals OBJECT-TYPE
SYNTAX Unsigned32 (0..96)
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of intervals in the range from 0 to
optIfPerfMonIntervalNumIntervals for which no performance monitoring data is available and/or the data is invalid."
  ::= { optIfPerfMonIntervalEntry 4 }

-- the optIfOTSn group
-- This group handles the configuration and performance
-- monitoring objects for OTS layers.

-- OTSn config table

optIfOTSnConfigTable OBJECT-TYPE
SYNTAX SEQUENCE OF OptIfOTSnConfigEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A table of OTSn configuration information."
  ::= { optIfOTSn 1 }

optIfOTSnConfigEntry OBJECT-TYPE
SYNTAX OptIfOTSnConfigEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A conceptual row that contains OTSn configuration
information of an interface."
INDEX { ifIndex }
  ::= { optIfOTSnConfigTable 1 }

OptIfOTSnConfigEntry ::=


Page 39

  SEQUENCE {
    optIfOTSnDirectionality              OptIfDirectionality,
    optIfOTSnAprStatus                   SnmpAdminString,
    optIfOTSnAprControl                  SnmpAdminString,
    optIfOTSnTraceIdentifierTransmitted  OptIfTxTI,
    optIfOTSnDAPIExpected                OptIfExDAPI,
    optIfOTSnSAPIExpected                OptIfExSAPI,
    optIfOTSnTraceIdentifierAccepted     OptIfAcTI,
    optIfOTSnTIMDetMode                  OptIfTIMDetMode,
    optIfOTSnTIMActEnabled               TruthValue,
    optIfOTSnCurrentStatus               BITS
    }

optIfOTSnDirectionality OBJECT-TYPE
SYNTAX OptIfDirectionality
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Indicates the directionality of the entity."
  ::= { optIfOTSnConfigEntry 1 }

optIfOTSnAprStatus OBJECT-TYPE
SYNTAX SnmpAdminString
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This attribute indicates the status of the Automatic
Power Reduction (APR) function of the entity. Valid
values are 'on' and 'off'."
  ::= { optIfOTSnConfigEntry 2 }

optIfOTSnAprControl OBJECT-TYPE
SYNTAX SnmpAdminString
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"This object is a UTF-8 encoded string that specifies Automatic Power Reduction (APR) control actions requested of this entity (when written) and that returns the current APR control state of this entity (when read). The values are implementation-defined. Any implementation that instantiates this object must document the set of values that it allows to be written, the set of values that it will return, and what each of those values means."
  ::= { optIfOTSnConfigEntry 3 }

optIfOTSnTraceIdentifierTransmitted OBJECT-TYPE
SYNTAX OptIfTxTI
MAX-ACCESS read-write


Page 40

STATUS current
DESCRIPTION
"The trace identifier transmitted.
This object is applicable when optIfOTSnDirectionality has the value source(2) or bidirectional(3).
This object does not apply to reduced-capability systems (i.e., those for which optIfOTMnReduced has the value true(1)) or at IrDI interfaces (i.e., when optIfOTMnInterfaceType field 1 has the value 'IrDI').
If no value is ever set by a management entity for the object optIfOTSnTraceIdentifierTransmitted, system-specific default value will be used. Any implementation that instantiates this object must document the system-specific default value or how it is derived."

  ::= { optIfOTSnConfigEntry 4 }

optIfOTSnDAPIExpected OBJECT-TYPE
SYNTAX OptIfExDAPI
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"The DAPI expected by the receiver.
This object is applicable when optIfOTSnDirectionality has the value sink(1) or bidirectional(3). It has no effect if optIfOTSnTIMDetMode has the value off(1) or sapi(3).
This object does not apply to reduced-capability systems (i.e., those for which optIfOTMnReduced has the value true(1)) or at IrDI interfaces (i.e., when optIfOTMnInterfaceType field 1 has the value 'IrDI')."
  ::= { optIfOTSnConfigEntry 5 }

optIfOTSnSAPIExpected OBJECT-TYPE
SYNTAX OptIfExSAPI
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"The SAPI expected by the receiver.
This object is applicable when optIfOTSnDirectionality has the value sink(1) or bidirectional(3). It has no effect if optIfOTSnTIMDetMode has the value off(1) or dapi(2).
This object does not apply to reduced-capability systems (i.e., those for which optIfOTMnReduced has the value true(1)) or at IrDI interfaces (i.e., when optIfOTMnInterfaceType field 1 has the value 'IrDI')."
  ::= { optIfOTSnConfigEntry 6 }

optIfOTSnTraceIdentifierAccepted OBJECT-TYPE
SYNTAX OptIfAcTI


Page 41

MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The actual trace identifier received.
This object is applicable when optIfOTSnDirectionality has the value sink(1) or bidirectional(3). Its value is unspecified if optIfOTSnCurrentStatus has either or both of the
losO(5) and los(6) bits set.
This object does not apply to reduced-capability systems (i.e., those for which optIfOTMnReduced has the value true(1)) or at IrDI interfaces (i.e., when optIfOTMnInterfaceType field 1 has the value 'IrDI')."

  ::= { optIfOTSnConfigEntry 7 }

optIfOTSnTIMDetMode OBJECT-TYPE
SYNTAX OptIfTIMDetMode
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"Indicates the mode of the Trace Identifier Mismatch (TIM) Detection function. This object is applicable
when optIfOTSnDirectionality has the value sink(1)
or bidirectional(3). The default value is off(1).
This object does not apply to reduced-capability systems (i.e., those for which optIfOTMnReduced has the value true(1)) or at IrDI interfaces (i.e., when optIfOTMnInterfaceType field 1 has the value 'IrDI').
The default value of this object is off(1)."
  ::= { optIfOTSnConfigEntry 8 }

optIfOTSnTIMActEnabled OBJECT-TYPE
SYNTAX TruthValue
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"Indicates whether the Trace Identifier Mismatch (TIM)
Consequent Action function is enabled. This object
is applicable when optIfOTSnDirectionality has the
value sink(1) or bidirectional(3). It has no effect
when the value of optIfOTSnTIMDetMode is off(1).
This object does not apply to reduced-capability systems (i.e., those for which optIfOTMnReduced has the value true(1)) or at IrDI interfaces (i.e., when optIfOTMnInterfaceType field 1 has the value 'IrDI').
The default value of this object is false(2)."
  ::= { optIfOTSnConfigEntry 9 }

optIfOTSnCurrentStatus OBJECT-TYPE


Page 42

  SYNTAX  BITS {
    bdiP(0),
    bdiO(1),
    bdi(2),
    tim(3),
    losP(4),
    losO(5),
    los(6)
    }
  MAX-ACCESS  read-only
  STATUS  current
  DESCRIPTION
    "Indicates the defect condition of the entity, if any.
     This object is applicable when optIfOTSnDirectionality
     has the value sink(1) or bidirectional(3).  In
     reduced-capability systems or at IrDI interfaces
     the only bit position that may be set is los(6)."
  ::= { optIfOTSnConfigEntry 10 }

-- OTSn sink current table
-- Contains data for the current 15-minute performance monitoring
-- interval.

optIfOTSnSinkCurrentTable OBJECT-TYPE
SYNTAX SEQUENCE OF OptIfOTSnSinkCurrentEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A table of OTSn sink performance monitoring information for the current 15-minute interval."
  ::= { optIfOTSn 2 }

optIfOTSnSinkCurrentEntry OBJECT-TYPE
SYNTAX OptIfOTSnSinkCurrentEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A conceptual row that contains OTSn sink performance
monitoring information of an interface for the current
15-minute interval."
INDEX { ifIndex }
  ::= { optIfOTSnSinkCurrentTable 1 }

OptIfOTSnSinkCurrentEntry ::=
  SEQUENCE {
    optIfOTSnSinkCurrentSuspectedFlag             TruthValue,
    optIfOTSnSinkCurrentInputPower                Integer32,
    optIfOTSnSinkCurrentLowInputPower             Integer32,


Page 43

    optIfOTSnSinkCurrentHighInputPower            Integer32,
    optIfOTSnSinkCurrentLowerInputPowerThreshold  Integer32,
    optIfOTSnSinkCurrentUpperInputPowerThreshold  Integer32,
    optIfOTSnSinkCurrentOutputPower               Integer32,
    optIfOTSnSinkCurrentLowOutputPower            Integer32,
    optIfOTSnSinkCurrentHighOutputPower           Integer32,
    optIfOTSnSinkCurrentLowerOutputPowerThreshold Integer32,
    optIfOTSnSinkCurrentUpperOutputPowerThreshold Integer32
    }

optIfOTSnSinkCurrentSuspectedFlag OBJECT-TYPE
SYNTAX TruthValue
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"If true, the data in this entry may be unreliable."
  ::= { optIfOTSnSinkCurrentEntry 1 }

optIfOTSnSinkCurrentInputPower OBJECT-TYPE
SYNTAX Integer32
UNITS "0.1 dbm"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The optical power monitored at the input."
  ::= { optIfOTSnSinkCurrentEntry 2 }

optIfOTSnSinkCurrentLowInputPower OBJECT-TYPE
SYNTAX Integer32
UNITS "0.1 dbm"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The lowest optical power monitored at the input during the current 15-minute interval."
  ::= { optIfOTSnSinkCurrentEntry 3 }

optIfOTSnSinkCurrentHighInputPower OBJECT-TYPE
SYNTAX Integer32
UNITS "0.1 dbm"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The highest optical power monitored at the input during the current 15-minute interval."
  ::= { optIfOTSnSinkCurrentEntry 4 }

optIfOTSnSinkCurrentLowerInputPowerThreshold OBJECT-TYPE


Page 44

SYNTAX Integer32
UNITS "0.1 dbm"
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"The lower limit threshold on input power. If
optIfOTSnSinkCurrentInputPower drops to this value or below, a Threshold Crossing Alert (TCA) should be sent."

  ::= { optIfOTSnSinkCurrentEntry 5 }

optIfOTSnSinkCurrentUpperInputPowerThreshold OBJECT-TYPE
SYNTAX Integer32
UNITS "0.1 dbm"
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"The upper limit threshold on input power. If
optIfOTSnSinkCurrentInputPower reaches or exceeds this value, a Threshold Crossing Alert (TCA) should be sent."
  ::= { optIfOTSnSinkCurrentEntry 6 }

optIfOTSnSinkCurrentOutputPower OBJECT-TYPE
SYNTAX Integer32
UNITS "0.1 dbm"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The optical power monitored at the output."
  ::= { optIfOTSnSinkCurrentEntry 7 }

optIfOTSnSinkCurrentLowOutputPower OBJECT-TYPE
SYNTAX Integer32
UNITS "0.1 dbm"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The lowest optical power monitored at the output during the current 15-minute interval."
  ::= { optIfOTSnSinkCurrentEntry 8 }

optIfOTSnSinkCurrentHighOutputPower OBJECT-TYPE
SYNTAX Integer32
UNITS "0.1 dbm"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The highest optical power monitored at the output during the current 15-minute interval."


Page 45

  ::= { optIfOTSnSinkCurrentEntry 9 }

optIfOTSnSinkCurrentLowerOutputPowerThreshold OBJECT-TYPE
SYNTAX Integer32
UNITS "0.1 dbm"
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"The lower limit threshold on output power. If
optIfOTSnSinkCurrentOutputPower drops to this value or below, a Threshold Crossing Alert (TCA) should be sent."
  ::= { optIfOTSnSinkCurrentEntry 10 }

optIfOTSnSinkCurrentUpperOutputPowerThreshold OBJECT-TYPE
SYNTAX Integer32
UNITS "0.1 dbm"
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"The upper limit threshold on output power. If
optIfOTSnSinkCurrentOutputPower reaches or exceeds this value, a Threshold Crossing Alert (TCA) should be sent."
  ::= { optIfOTSnSinkCurrentEntry 11 }

-- OTSn sink interval table
-- Contains data for previous 15-minute performance monitoring
-- intervals.

optIfOTSnSinkIntervalTable OBJECT-TYPE
SYNTAX SEQUENCE OF OptIfOTSnSinkIntervalEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A table of historical OTSn sink performance monitoring
information."
  ::= { optIfOTSn 3 }

optIfOTSnSinkIntervalEntry OBJECT-TYPE
SYNTAX OptIfOTSnSinkIntervalEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A conceptual row that contains OTSn sink performance
monitoring information of an interface during a particular historical interval."
INDEX { ifIndex, optIfOTSnSinkIntervalNumber }
  ::= { optIfOTSnSinkIntervalTable 1 }


Page 46

OptIfOTSnSinkIntervalEntry ::=
  SEQUENCE {
    optIfOTSnSinkIntervalNumber           OptIfIntervalNumber,
    optIfOTSnSinkIntervalSuspectedFlag    TruthValue,
    optIfOTSnSinkIntervalLastInputPower   Integer32,
    optIfOTSnSinkIntervalLowInputPower    Integer32,
    optIfOTSnSinkIntervalHighInputPower   Integer32,
    optIfOTSnSinkIntervalLastOutputPower  Integer32,
    optIfOTSnSinkIntervalLowOutputPower   Integer32,
    optIfOTSnSinkIntervalHighOutputPower  Integer32

}

optIfOTSnSinkIntervalNumber OBJECT-TYPE
SYNTAX OptIfIntervalNumber
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"Uniquely identifies the interval."
  ::= { optIfOTSnSinkIntervalEntry 1 }

optIfOTSnSinkIntervalSuspectedFlag OBJECT-TYPE
SYNTAX TruthValue
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"If true, the data in this entry may be unreliable."
  ::= { optIfOTSnSinkIntervalEntry 2 }

optIfOTSnSinkIntervalLastInputPower OBJECT-TYPE
SYNTAX Integer32
UNITS "0.1 dbm"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The last optical power monitored at the input during the interval."
  ::= { optIfOTSnSinkIntervalEntry 3 }

optIfOTSnSinkIntervalLowInputPower OBJECT-TYPE
SYNTAX Integer32
UNITS "0.1 dbm"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The lowest optical power monitored at the input during the interval."
  ::= { optIfOTSnSinkIntervalEntry 4 }


Page 47

optIfOTSnSinkIntervalHighInputPower OBJECT-TYPE
SYNTAX Integer32
UNITS "0.1 dbm"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The highest optical power monitored at the input during the interval."
  ::= { optIfOTSnSinkIntervalEntry 5 }

optIfOTSnSinkIntervalLastOutputPower OBJECT-TYPE
SYNTAX Integer32
UNITS "0.1 dbm"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The last optical power monitored at the output during the interval."
  ::= { optIfOTSnSinkIntervalEntry 6 }

optIfOTSnSinkIntervalLowOutputPower OBJECT-TYPE
SYNTAX Integer32
UNITS "0.1 dbm"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The lowest optical power monitored at the output during the interval."
  ::= { optIfOTSnSinkIntervalEntry 7 }

optIfOTSnSinkIntervalHighOutputPower OBJECT-TYPE
SYNTAX Integer32
UNITS "0.1 dbm"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The highest optical power monitored at the output during the interval."
  ::= { optIfOTSnSinkIntervalEntry 8 }

-- OTSn sink current day table
-- Contains data for the current 24-hour performance
-- monitoring interval.

optIfOTSnSinkCurDayTable OBJECT-TYPE
SYNTAX SEQUENCE OF OptIfOTSnSinkCurDayEntry
MAX-ACCESS not-accessible
STATUS current


Page 48

DESCRIPTION
"A table of OTSn sink performance monitoring information for the current 24-hour interval."

  ::= { optIfOTSn 4 }

optIfOTSnSinkCurDayEntry OBJECT-TYPE
SYNTAX OptIfOTSnSinkCurDayEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A conceptual row that contains OTSn sink performance
monitoring information of an interface for the current
24-hour interval."
INDEX { ifIndex }
  ::= { optIfOTSnSinkCurDayTable 1 }

OptIfOTSnSinkCurDayEntry ::=
  SEQUENCE {
    optIfOTSnSinkCurDaySuspectedFlag    TruthValue,
    optIfOTSnSinkCurDayLowInputPower    Integer32,
    optIfOTSnSinkCurDayHighInputPower   Integer32,
    optIfOTSnSinkCurDayLowOutputPower   Integer32,
    optIfOTSnSinkCurDayHighOutputPower  Integer32
    }

optIfOTSnSinkCurDaySuspectedFlag OBJECT-TYPE
SYNTAX TruthValue
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"If true, the data in this entry may be unreliable."
  ::= { optIfOTSnSinkCurDayEntry 1 }

optIfOTSnSinkCurDayLowInputPower OBJECT-TYPE
SYNTAX Integer32
UNITS "0.1 dbm"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The lowest optical power monitored at the input during the current 24-hour interval."
  ::= { optIfOTSnSinkCurDayEntry 2 }

optIfOTSnSinkCurDayHighInputPower OBJECT-TYPE
SYNTAX Integer32
UNITS "0.1 dbm"
MAX-ACCESS read-only
STATUS current


Page 49

DESCRIPTION
"The highest optical power monitored at the input during the current 24-hour interval."

  ::= { optIfOTSnSinkCurDayEntry 3 }

optIfOTSnSinkCurDayLowOutputPower OBJECT-TYPE
SYNTAX Integer32
UNITS "0.1 dbm"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The lowest optical power monitored at the output during the current 24-hour interval."
  ::= { optIfOTSnSinkCurDayEntry 4 }

optIfOTSnSinkCurDayHighOutputPower OBJECT-TYPE
SYNTAX Integer32
UNITS "0.1 dbm"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The highest optical power monitored at the output during the current 24-hour interval."
  ::= { optIfOTSnSinkCurDayEntry 5 }

-- OTSn sink previous day table
-- Contains data for the previous 24-hour performance
-- monitoring interval.

optIfOTSnSinkPrevDayTable OBJECT-TYPE
SYNTAX SEQUENCE OF OptIfOTSnSinkPrevDayEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A table of OTSn sink performance monitoring information for the previous 24-hour interval."
  ::= { optIfOTSn 5 }

optIfOTSnSinkPrevDayEntry OBJECT-TYPE
SYNTAX OptIfOTSnSinkPrevDayEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A conceptual row that contains OTSn sink performance
monitoring information of an interface for the previous 24-hour interval."
INDEX { ifIndex }
  ::= { optIfOTSnSinkPrevDayTable 1 }


Page 50

OptIfOTSnSinkPrevDayEntry ::=
  SEQUENCE {
    optIfOTSnSinkPrevDaySuspectedFlag    TruthValue,
    optIfOTSnSinkPrevDayLastInputPower   Integer32,
    optIfOTSnSinkPrevDayLowInputPower    Integer32,
    optIfOTSnSinkPrevDayHighInputPower   Integer32,
    optIfOTSnSinkPrevDayLastOutputPower  Integer32,
    optIfOTSnSinkPrevDayLowOutputPower   Integer32,
    optIfOTSnSinkPrevDayHighOutputPower  Integer32
    }

optIfOTSnSinkPrevDaySuspectedFlag OBJECT-TYPE
SYNTAX TruthValue
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"If true, the data in this entry may be unreliable."
  ::= { optIfOTSnSinkPrevDayEntry 1 }

optIfOTSnSinkPrevDayLastInputPower OBJECT-TYPE
SYNTAX Integer32
UNITS "0.1 dbm"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The last optical power monitored at the input during the previous 24-hour interval."
  ::= { optIfOTSnSinkPrevDayEntry 2 }

optIfOTSnSinkPrevDayLowInputPower OBJECT-TYPE
SYNTAX Integer32
UNITS "0.1 dbm"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The lowest optical power monitored at the input during the previous 24-hour interval."
  ::= { optIfOTSnSinkPrevDayEntry 3 }

optIfOTSnSinkPrevDayHighInputPower OBJECT-TYPE
SYNTAX Integer32
UNITS "0.1 dbm"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The highest optical power monitored at the input during the previous 24-hour interval."
  ::= { optIfOTSnSinkPrevDayEntry 4 }


Page 51

optIfOTSnSinkPrevDayLastOutputPower OBJECT-TYPE
SYNTAX Integer32
UNITS "0.1 dbm"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The last optical power monitored at the output during the previous 24-hour interval."
  ::= { optIfOTSnSinkPrevDayEntry 5 }

optIfOTSnSinkPrevDayLowOutputPower OBJECT-TYPE
SYNTAX Integer32
UNITS "0.1 dbm"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The lowest optical power monitored at the output during the previous 24-hour interval."
  ::= { optIfOTSnSinkPrevDayEntry 6 }

optIfOTSnSinkPrevDayHighOutputPower OBJECT-TYPE
SYNTAX Integer32
UNITS "0.1 dbm"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The highest optical power monitored at the output during the previous 24-hour interval."
  ::= { optIfOTSnSinkPrevDayEntry 7 }

-- OTSn source current table
-- Contains data for the current 15-minute performance monitoring
-- interval.

optIfOTSnSrcCurrentTable OBJECT-TYPE
SYNTAX SEQUENCE OF OptIfOTSnSrcCurrentEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A table of OTSn source performance monitoring information for the current 15-minute interval."
  ::= { optIfOTSn 6 }

optIfOTSnSrcCurrentEntry OBJECT-TYPE
SYNTAX OptIfOTSnSrcCurrentEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION


Page 52

"A conceptual row that contains OTSn source performance
monitoring information of an interface for the current
15-minute interval."
INDEX { ifIndex }

  ::= { optIfOTSnSrcCurrentTable 1 }

OptIfOTSnSrcCurrentEntry ::=
  SEQUENCE {
    optIfOTSnSrcCurrentSuspectedFlag              TruthValue,
    optIfOTSnSrcCurrentOutputPower                Integer32,
    optIfOTSnSrcCurrentLowOutputPower             Integer32,
    optIfOTSnSrcCurrentHighOutputPower            Integer32,
    optIfOTSnSrcCurrentLowerOutputPowerThreshold  Integer32,
    optIfOTSnSrcCurrentUpperOutputPowerThreshold  Integer32,
    optIfOTSnSrcCurrentInputPower                 Integer32,
    optIfOTSnSrcCurrentLowInputPower              Integer32,
    optIfOTSnSrcCurrentHighInputPower             Integer32,
    optIfOTSnSrcCurrentLowerInputPowerThreshold   Integer32,
    optIfOTSnSrcCurrentUpperInputPowerThreshold   Integer32
    }

optIfOTSnSrcCurrentSuspectedFlag OBJECT-TYPE
SYNTAX TruthValue
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"If true, the data in this entry may be unreliable."
  ::= { optIfOTSnSrcCurrentEntry 1 }

optIfOTSnSrcCurrentOutputPower OBJECT-TYPE
SYNTAX Integer32
UNITS "0.1 dbm"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The optical power monitored at the output."
  ::= { optIfOTSnSrcCurrentEntry 2 }

optIfOTSnSrcCurrentLowOutputPower OBJECT-TYPE
SYNTAX Integer32
UNITS "0.1 dbm"
MAX-ACCESS read-only
STATUS current

DESCRIPTION
"The lowest optical power monitored at the output during the current 15-minute interval."

  ::= { optIfOTSnSrcCurrentEntry 3 }


Page 53

optIfOTSnSrcCurrentHighOutputPower OBJECT-TYPE
SYNTAX Integer32
UNITS "0.1 dbm"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The highest optical power monitored at the output during the current 15-minute interval."
  ::= { optIfOTSnSrcCurrentEntry 4 }

optIfOTSnSrcCurrentLowerOutputPowerThreshold OBJECT-TYPE
SYNTAX Integer32
UNITS "0.1 dbm"
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"The lower limit threshold on output power. If
optIfOTSnSrcCurrentOutputPower drops to this value or below, a Threshold Crossing Alert (TCA) should be sent."
  ::= { optIfOTSnSrcCurrentEntry 5 }

optIfOTSnSrcCurrentUpperOutputPowerThreshold OBJECT-TYPE
SYNTAX Integer32
UNITS "0.1 dbm"
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"The upper limit threshold on output power. If
optIfOTSnSrcCurrentOutputPower reaches or exceeds this value, a Threshold Crossing Alert (TCA) should be sent."
  ::= { optIfOTSnSrcCurrentEntry 6 }

optIfOTSnSrcCurrentInputPower OBJECT-TYPE
SYNTAX Integer32
UNITS "0.1 dbm"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The optical power monitored at the input."
  ::= { optIfOTSnSrcCurrentEntry 7 }

optIfOTSnSrcCurrentLowInputPower OBJECT-TYPE
SYNTAX Integer32
UNITS "0.1 dbm"
MAX-ACCESS read-only
STATUS current

DESCRIPTION


Page 54

"The lowest optical power monitored at the input during the current 15-minute interval."

  ::= { optIfOTSnSrcCurrentEntry 8 }

optIfOTSnSrcCurrentHighInputPower OBJECT-TYPE
SYNTAX Integer32
UNITS "0.1 dbm"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The highest optical power monitored at the input during the current 15-minute interval."
  ::= { optIfOTSnSrcCurrentEntry 9 }

optIfOTSnSrcCurrentLowerInputPowerThreshold OBJECT-TYPE
SYNTAX Integer32
UNITS "0.1 dbm"
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"The lower limit threshold on input power. If
optIfOTSnSrcCurrentInputPower drops to this value or below, a Threshold Crossing Alert (TCA) should be sent."
  ::= { optIfOTSnSrcCurrentEntry 10 }

optIfOTSnSrcCurrentUpperInputPowerThreshold OBJECT-TYPE
SYNTAX Integer32
UNITS "0.1 dbm"
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"The upper limit threshold on input power. If
optIfOTSnSrcCurrentInputPower reaches or exceeds this value, a Threshold Crossing Alert (TCA) should be sent."
  ::= { optIfOTSnSrcCurrentEntry 11 }

-- OTSn source interval table
-- Contains data for previous 15-minute performance monitoring
-- intervals.

optIfOTSnSrcIntervalTable OBJECT-TYPE
SYNTAX SEQUENCE OF OptIfOTSnSrcIntervalEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A table of historical OTSn source performance monitoring information."
  ::= { optIfOTSn 7 }


Page 55

optIfOTSnSrcIntervalEntry OBJECT-TYPE
SYNTAX OptIfOTSnSrcIntervalEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A conceptual row that contains OTSn source performance
monitoring information of an interface during a particular historical interval."
INDEX { ifIndex, optIfOTSnSrcIntervalNumber }
  ::= { optIfOTSnSrcIntervalTable 1 }

OptIfOTSnSrcIntervalEntry ::=
  SEQUENCE {
    optIfOTSnSrcIntervalNumber           OptIfIntervalNumber,
    optIfOTSnSrcIntervalSuspectedFlag    TruthValue,
    optIfOTSnSrcIntervalLastOutputPower  Integer32,
    optIfOTSnSrcIntervalLowOutputPower   Integer32,
    optIfOTSnSrcIntervalHighOutputPower  Integer32,
    optIfOTSnSrcIntervalLastInputPower   Integer32,
    optIfOTSnSrcIntervalLowInputPower    Integer32,
    optIfOTSnSrcIntervalHighInputPower   Integer32
    }

optIfOTSnSrcIntervalNumber OBJECT-TYPE
SYNTAX OptIfIntervalNumber
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"Uniquely identifies the interval."
  ::= { optIfOTSnSrcIntervalEntry 1 }

optIfOTSnSrcIntervalSuspectedFlag OBJECT-TYPE
SYNTAX TruthValue
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"If true, the data in this entry may be unreliable."
  ::= { optIfOTSnSrcIntervalEntry 2 }

optIfOTSnSrcIntervalLastOutputPower OBJECT-TYPE
SYNTAX Integer32
UNITS "0.1 dbm"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The last optical power monitored at the output during the interval."
  ::= { optIfOTSnSrcIntervalEntry 3 }


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optIfOTSnSrcIntervalLowOutputPower OBJECT-TYPE
SYNTAX Integer32
UNITS "0.1 dbm"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The lowest optical power monitored at the output during the interval."
  ::= { optIfOTSnSrcIntervalEntry 4 }

optIfOTSnSrcIntervalHighOutputPower OBJECT-TYPE
SYNTAX Integer32
UNITS "0.1 dbm"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The highest optical power monitored at the output during the interval."
  ::= { optIfOTSnSrcIntervalEntry 5 }

optIfOTSnSrcIntervalLastInputPower OBJECT-TYPE
SYNTAX Integer32
UNITS "0.1 dbm"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The last optical power monitored at the input during the interval."
  ::= { optIfOTSnSrcIntervalEntry 6 }

optIfOTSnSrcIntervalLowInputPower OBJECT-TYPE
SYNTAX Integer32
UNITS "0.1 dbm"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The lowest optical power monitored at the input during the interval."
  ::= { optIfOTSnSrcIntervalEntry 7 }

optIfOTSnSrcIntervalHighInputPower OBJECT-TYPE
SYNTAX Integer32
UNITS "0.1 dbm"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The highest optical power monitored at the input during the interval."


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  ::= { optIfOTSnSrcIntervalEntry 8 }

-- OTSn source current day table
-- Contains data for the current 24-hour performance
-- monitoring interval.

optIfOTSnSrcCurDayTable OBJECT-TYPE
SYNTAX SEQUENCE OF OptIfOTSnSrcCurDayEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A table of OTSn source performance monitoring information for the current 24-hour interval."
  ::= { optIfOTSn 8 }

optIfOTSnSrcCurDayEntry OBJECT-TYPE
SYNTAX OptIfOTSnSrcCurDayEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A conceptual row that contains OTSn source performance
monitoring information of an interface for the current
24-hour interval."
INDEX { ifIndex }
  ::= { optIfOTSnSrcCurDayTable 1 }

OptIfOTSnSrcCurDayEntry ::=
  SEQUENCE {
    optIfOTSnSrcCurDaySuspectedFlag    TruthValue,
    optIfOTSnSrcCurDayLowOutputPower   Integer32,
    optIfOTSnSrcCurDayHighOutputPower  Integer32,
    optIfOTSnSrcCurDayLowInputPower    Integer32,
    optIfOTSnSrcCurDayHighInputPower   Integer32
    }

optIfOTSnSrcCurDaySuspectedFlag OBJECT-TYPE
SYNTAX TruthValue
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"If true, the data in this entry may be unreliable."
  ::= { optIfOTSnSrcCurDayEntry 1 }

optIfOTSnSrcCurDayLowOutputPower OBJECT-TYPE
SYNTAX Integer32
UNITS "0.1 dbm"
MAX-ACCESS read-only


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STATUS current
DESCRIPTION
"The lowest optical power monitored at the output during the current 24-hour interval."

  ::= { optIfOTSnSrcCurDayEntry 2 }

optIfOTSnSrcCurDayHighOutputPower OBJECT-TYPE
SYNTAX Integer32
UNITS "0.1 dbm"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The highest optical power monitored at the output during the current 24-hour interval."
  ::= { optIfOTSnSrcCurDayEntry 3 }

optIfOTSnSrcCurDayLowInputPower OBJECT-TYPE
SYNTAX Integer32
UNITS "0.1 dbm"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The lowest optical power monitored at the input during the current 24-hour interval."
  ::= { optIfOTSnSrcCurDayEntry 4 }

optIfOTSnSrcCurDayHighInputPower OBJECT-TYPE
SYNTAX Integer32
UNITS "0.1 dbm"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The highest optical power monitored at the input during the current 24-hour interval."
  ::= { optIfOTSnSrcCurDayEntry 5 }

-- OTSn source previous day table
-- Contains data for the previous 24-hour performance
-- monitoring interval.

optIfOTSnSrcPrevDayTable OBJECT-TYPE
SYNTAX SEQUENCE OF OptIfOTSnSrcPrevDayEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A table of OTSn source performance monitoring information for the previous 24-hour interval."
  ::= { optIfOTSn 9 }


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optIfOTSnSrcPrevDayEntry OBJECT-TYPE
SYNTAX OptIfOTSnSrcPrevDayEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A conceptual row that contains OTSn source performance
monitoring information of an interface for the previous 24-hour interval."
INDEX { ifIndex }
  ::= { optIfOTSnSrcPrevDayTable 1 }

OptIfOTSnSrcPrevDayEntry ::=
  SEQUENCE {
    optIfOTSnSrcPrevDaySuspectedFlag    TruthValue,
    optIfOTSnSrcPrevDayLastOutputPower  Integer32,
    optIfOTSnSrcPrevDayLowOutputPower   Integer32,
    optIfOTSnSrcPrevDayHighOutputPower  Integer32,
    optIfOTSnSrcPrevDayLastInputPower   Integer32,
    optIfOTSnSrcPrevDayLowInputPower    Integer32,
    optIfOTSnSrcPrevDayHighInputPower   Integer32
    }

optIfOTSnSrcPrevDaySuspectedFlag OBJECT-TYPE
SYNTAX TruthValue
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"If true, the data in this entry may be unreliable."
  ::= { optIfOTSnSrcPrevDayEntry 1 }

optIfOTSnSrcPrevDayLastOutputPower OBJECT-TYPE
SYNTAX Integer32
UNITS "0.1 dbm"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The last optical power monitored at the output during the previous 24-hour interval."
  ::= { optIfOTSnSrcPrevDayEntry 2 }

optIfOTSnSrcPrevDayLowOutputPower OBJECT-TYPE
SYNTAX Integer32
UNITS "0.1 dbm"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The lowest optical power monitored at the output during the previous 24-hour interval."


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  ::= { optIfOTSnSrcPrevDayEntry 3 }

optIfOTSnSrcPrevDayHighOutputPower OBJECT-TYPE
SYNTAX Integer32
UNITS "0.1 dbm"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The highest optical power monitored at the output during the previous 24-hour interval."
  ::= { optIfOTSnSrcPrevDayEntry 4 }

optIfOTSnSrcPrevDayLastInputPower OBJECT-TYPE
SYNTAX Integer32
UNITS "0.1 dbm"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The last optical power monitored at the input during the previous 24-hour interval."
  ::= { optIfOTSnSrcPrevDayEntry 5 }

optIfOTSnSrcPrevDayLowInputPower OBJECT-TYPE
SYNTAX Integer32
UNITS "0.1 dbm"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The lowest optical power monitored at the input during the previous 24-hour interval."
  ::= { optIfOTSnSrcPrevDayEntry 6 }

optIfOTSnSrcPrevDayHighInputPower OBJECT-TYPE
SYNTAX Integer32
UNITS "0.1 dbm"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The highest optical power monitored at the input during the previous 24-hour interval."
  ::= { optIfOTSnSrcPrevDayEntry 7 }

-- the optIfOMSn group
-- This group handles the configuration and performance monitoring
-- information for OMS layers.

-- OMSn config table


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optIfOMSnConfigTable OBJECT-TYPE
SYNTAX SEQUENCE OF OptIfOMSnConfigEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A table of OMSn configuration information."
  ::= { optIfOMSn 1 }

optIfOMSnConfigEntry OBJECT-TYPE
SYNTAX OptIfOMSnConfigEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A conceptual row that contains OMSn configuration
information of an interface."
INDEX { ifIndex }
  ::= { optIfOMSnConfigTable 1 }

OptIfOMSnConfigEntry ::=
  SEQUENCE {
    optIfOMSnDirectionality OptIfDirectionality,
    optIfOMSnCurrentStatus  BITS
    }

optIfOMSnDirectionality OBJECT-TYPE
SYNTAX OptIfDirectionality
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Indicates the directionality of the entity."
  ::= { optIfOMSnConfigEntry 1 }

optIfOMSnCurrentStatus OBJECT-TYPE
  SYNTAX  BITS {
    ssfP(0),
    ssfO(1),
    ssf(2),
    bdiP(3),
    bdiO(4),
    bdi(5),
    losP(6)
    }
  MAX-ACCESS  read-only
  STATUS  current
  DESCRIPTION
    "Indicates the defect condition of the entity, if any.
     This object is applicable only to full capability
     systems whose interface type is IaDI and for which


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optIfOMSnDirectionality has the value sink(1) or
bidirectional(3)."

  ::= { optIfOMSnConfigEntry 2 }

-- OMSn sink current table
-- Contains data for the current 15-minute performance monitoring
-- interval.

optIfOMSnSinkCurrentTable OBJECT-TYPE
SYNTAX SEQUENCE OF OptIfOMSnSinkCurrentEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A table of OMSn sink performance monitoring information for the current 15-minute interval."
  ::= { optIfOMSn 2 }

optIfOMSnSinkCurrentEntry OBJECT-TYPE
SYNTAX OptIfOMSnSinkCurrentEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A conceptual row that contains OMSn sink performance
monitoring information of an interface for the current
15-minute interval."
INDEX { ifIndex }
  ::= { optIfOMSnSinkCurrentTable 1 }

OptIfOMSnSinkCurrentEntry ::=
  SEQUENCE {
    optIfOMSnSinkCurrentSuspectedFlag              TruthValue,
    optIfOMSnSinkCurrentAggregatedInputPower       Integer32,
    optIfOMSnSinkCurrentLowAggregatedInputPower    Integer32,
    optIfOMSnSinkCurrentHighAggregatedInputPower   Integer32,
    optIfOMSnSinkCurrentLowerInputPowerThreshold   Integer32,
    optIfOMSnSinkCurrentUpperInputPowerThreshold   Integer32,
    optIfOMSnSinkCurrentOutputPower                Integer32,
    optIfOMSnSinkCurrentLowOutputPower             Integer32,
    optIfOMSnSinkCurrentHighOutputPower            Integer32,
    optIfOMSnSinkCurrentLowerOutputPowerThreshold  Integer32,
    optIfOMSnSinkCurrentUpperOutputPowerThreshold  Integer32
    }

optIfOMSnSinkCurrentSuspectedFlag OBJECT-TYPE
SYNTAX TruthValue
MAX-ACCESS read-only
STATUS current
DESCRIPTION


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"If true, the data in this entry may be unreliable."

  ::= { optIfOMSnSinkCurrentEntry 1 }

optIfOMSnSinkCurrentAggregatedInputPower OBJECT-TYPE
SYNTAX Integer32
UNITS "0.1 dbm"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The aggregated optical power of all the DWDM input
channels."
  ::= { optIfOMSnSinkCurrentEntry 2 }

optIfOMSnSinkCurrentLowAggregatedInputPower OBJECT-TYPE
SYNTAX Integer32
UNITS "0.1 dbm"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The lowest aggregated optical power of all the DWDM input channels during the current 15-minute interval."
  ::= { optIfOMSnSinkCurrentEntry 3 }

optIfOMSnSinkCurrentHighAggregatedInputPower OBJECT-TYPE
SYNTAX Integer32
UNITS "0.1 dbm"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The highest aggregated optical power of all the DWDM input channels during the current 15-minute interval."
  ::= { optIfOMSnSinkCurrentEntry 4 }

optIfOMSnSinkCurrentLowerInputPowerThreshold OBJECT-TYPE
SYNTAX Integer32
UNITS "0.1 dbm"
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"The lower limit threshold on aggregated input power. If optIfOMSnSinkCurrentAggregatedInputPower drops to this value or below, a Threshold Crossing Alert (TCA) should be sent."
  ::= { optIfOMSnSinkCurrentEntry 5 }

optIfOMSnSinkCurrentUpperInputPowerThreshold OBJECT-TYPE
SYNTAX Integer32
UNITS "0.1 dbm"
MAX-ACCESS read-write


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STATUS current
DESCRIPTION
"The upper limit threshold on aggregated input power. If optIfOMSnSinkCurrentAggregatedInputPower reaches or exceeds this value, a Threshold Crossing Alert (TCA) should be sent."

  ::= { optIfOMSnSinkCurrentEntry 6 }

optIfOMSnSinkCurrentOutputPower OBJECT-TYPE
SYNTAX Integer32
UNITS "0.1 dbm"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The optical power monitored at the output."
  ::= { optIfOMSnSinkCurrentEntry 7 }

optIfOMSnSinkCurrentLowOutputPower OBJECT-TYPE
SYNTAX Integer32
UNITS "0.1 dbm"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The lowest optical power monitored at the output
during the current 15-minute interval."
  ::= { optIfOMSnSinkCurrentEntry 8 }

optIfOMSnSinkCurrentHighOutputPower OBJECT-TYPE
SYNTAX Integer32
UNITS "0.1 dbm"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The highest optical power monitored at the output
during the current 15-minute interval."
  ::= { optIfOMSnSinkCurrentEntry 9 }

optIfOMSnSinkCurrentLowerOutputPowerThreshold OBJECT-TYPE
SYNTAX Integer32
UNITS "0.1 dbm"
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"The lower limit threshold on output power. If
optIfOMSnSinkCurrentOutputPower drops to this value
or below, a Threshold Crossing Alert (TCA) should be sent."
  ::= { optIfOMSnSinkCurrentEntry 10 }

optIfOMSnSinkCurrentUpperOutputPowerThreshold OBJECT-TYPE


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SYNTAX Integer32
UNITS "0.1 dbm"
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"The upper limit threshold on output power. If
optIfOMSnSinkCurrentOutputPower reaches or exceeds
this value, a Threshold Crossing Alert (TCA) should be sent."

  ::= { optIfOMSnSinkCurrentEntry 11 }

-- OMSn sink interval table
-- Contains data for previous 15-minute performance monitoring
-- intervals.

optIfOMSnSinkIntervalTable OBJECT-TYPE
SYNTAX SEQUENCE OF OptIfOMSnSinkIntervalEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A table of historical OMSn sink performance monitoring
information."
  ::= { optIfOMSn 3 }

optIfOMSnSinkIntervalEntry OBJECT-TYPE
SYNTAX OptIfOMSnSinkIntervalEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A conceptual row that contains OMSn sink performance
monitoring information of an interface during a particular historical interval."
INDEX { ifIndex, optIfOMSnSinkIntervalNumber }
  ::= { optIfOMSnSinkIntervalTable 1 }

OptIfOMSnSinkIntervalEntry ::=
  SEQUENCE {
    optIfOMSnSinkIntervalNumber                    OptIfIntervalNumber,
    optIfOMSnSinkIntervalSuspectedFlag             TruthValue,
    optIfOMSnSinkIntervalLastAggregatedInputPower  Integer32,
    optIfOMSnSinkIntervalLowAggregatedInputPower   Integer32,
    optIfOMSnSinkIntervalHighAggregatedInputPower  Integer32,
    optIfOMSnSinkIntervalLastOutputPower           Integer32,
    optIfOMSnSinkIntervalLowOutputPower            Integer32,
    optIfOMSnSinkIntervalHighOutputPower           Integer32
    }

optIfOMSnSinkIntervalNumber OBJECT-TYPE
SYNTAX OptIfIntervalNumber


Page 66

MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"Uniquely identifies the interval."

  ::= { optIfOMSnSinkIntervalEntry 1 }

optIfOMSnSinkIntervalSuspectedFlag OBJECT-TYPE
SYNTAX TruthValue
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"If true, the data in this entry may be unreliable."
  ::= { optIfOMSnSinkIntervalEntry 2 }

optIfOMSnSinkIntervalLastAggregatedInputPower OBJECT-TYPE
SYNTAX Integer32
UNITS "0.1 dbm"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The last aggregated optical power of all the DWDM input channels during the interval."
  ::= { optIfOMSnSinkIntervalEntry 3 }

optIfOMSnSinkIntervalLowAggregatedInputPower OBJECT-TYPE
SYNTAX Integer32
UNITS "0.1 dbm"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The lowest aggregated optical power of all the DWDM input channels during the interval."
  ::= { optIfOMSnSinkIntervalEntry 4 }

optIfOMSnSinkIntervalHighAggregatedInputPower OBJECT-TYPE
SYNTAX Integer32
UNITS "0.1 dbm"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The highest aggregated optical power of all the DWDM input channels during the interval."
  ::= { optIfOMSnSinkIntervalEntry 5 }

optIfOMSnSinkIntervalLastOutputPower OBJECT-TYPE
SYNTAX Integer32
UNITS "0.1 dbm"
MAX-ACCESS read-only


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STATUS current
DESCRIPTION
"The last optical power at the output
during the interval."

  ::= { optIfOMSnSinkIntervalEntry 6 }

optIfOMSnSinkIntervalLowOutputPower OBJECT-TYPE
SYNTAX Integer32
UNITS "0.1 dbm"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The lowest optical power at the output
during the interval."
  ::= { optIfOMSnSinkIntervalEntry 7 }

optIfOMSnSinkIntervalHighOutputPower OBJECT-TYPE
SYNTAX Integer32
UNITS "0.1 dbm"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The highest optical power at the output
during the interval."
  ::= { optIfOMSnSinkIntervalEntry 8 }

-- OMSn sink current day table
-- Contains data for the current 24-hour performance
-- monitoring interval.

optIfOMSnSin