RFC1595

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Network Working Group T. Brown Request for Comments: 1595 K. Tesink Category: Standards Track Editors

                                        Bell Communications Research
                                                          March 1994
                 Definitions of Managed Objects
                for the SONET/SDH 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.

Abstract

This memo defines a portion of the Management Information Base (MIB) for use with network management protocols in TCP/IP-based internets. In particular, it defines objects for managing Synchronous Optical Network/Synchronous Digital Hierarchy (SONET/SDH) objects. This document is a companion document with Definitions of Managed Objects for the DS1/E1 and DS3/E3 Interface Types, RFC1406 [14] and RFC1407 [13].

This memo specifies a MIB module in a manner that is both compliant to the SNMPv2 SMI, and semantically identical to the peer SNMPv1 definitions.

3.2 Use of ifTable for SONET/SDH Medium/Section/Line

3.6 Values for x for the Section, Line, Path, and VT

The SNMPv2 Network Management Framework

The SNMPv2 Network Management Framework consists of four major components. They are:

  RFC 1442 [1] which defines the SMI, the mechanisms used for
  describing and naming objects for the purpose of management.
  STD 17, RFC 1213 [6] defines MIB-II, the core set of managed
  objects for the Internet suite of protocols. Reference [12]
  defines the evolution of the Interfaces Group of MIB II in terms
  of extensions and precise applications of the objects.
  RFC 1445 [4] which defines the administrative and other
  architectural aspects of the framework.
  RFC 1448 [5] which defines the protocol used for network access to
  managed objects.

The Framework permits new objects to be defined for the purpose of experimentation and evaluation.

This specification makes also use of:

  RFC 1443 [2] which defines textual conventions for the
  specification of managed objects.
  RFC 1444 [3] which defines conformance statements for the
  specification of managed objects.

Objects

Managed objects are accessed via a virtual information store, termed the Management Information Base or MIB. Objects in the MIB are defined using the subset of Abstract Syntax Notation One (ASN.1) [7] defined in the SMI. In particular, each object has a name, a syntax, and an encoding. The name is an object identifier, an administratively assigned name, which specifies an object type. The object type together with an object instance serves to uniquely identify a specific instantiation of the object. For human convenience, we often use a textual string, termed the OBJECT DESCRIPTOR, to also refer to the object type.

The syntax of an object type defines the abstract data structure corresponding to that object type. The ASN.1 language is used for this purpose. However, the SMI RFC 1442 purposely restricts the ASN.1 constructs which may be used. These restrictions are explicitly made for simplicity.

The encoding of an object type is simply how that object type is represented using the object type's syntax. Implicitly tied to the notion of an object type's syntax and encoding is how the object type is represented when being transmitted on the network. The SMI specifies the use of the basic encoding rules of ASN.1 [8], subject to the additional requirements imposed by the SNMP.

Format of Definitions

Section 4 contains contains the specification of all object types contained in this MIB module. The object types are defined using the conventions defined in the SMI, as amended by the extensions specified in the SNMPv2 SMI.

Overview

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

           sonet (39), sonetPath (50), sonetVT (51)

The definitions contained herein are based on the SONET/SDH specifications in ANSI T1.105 and T1.106-1988 [9, 9a, 10] and CCITT G.707, 708, 709, and G.783 [15-18].

Use of the ifTable

This section specifies how the MIB II interfaces group, as defined in [12], is used for SONET/SDH interfaces. The SONET/SDH layers support several multiplexing possibilities.

For example in SONET, an Synchronous Transport Signal 3 (STS-3) has 3 SONET Paths, and a STS-3c has 1 SONET Path. Another example could be a STS-12 having 4 SONET STS-3c Paths. Similarly, a SONET Synchronous Payload Envelope (SPE) can carry many Virtual Tributaries (VTs), for example, one SONET SPE can carry 28 VT1.5s. It is important to note that an SPE and a VT in SONET is collectively referred to as a Virtual Container (VC) in SDH. Also, an STS is called Synchronous Transport Module (STM) in SDH.

Not all SONET/SDH equipment terminate all SONET/SDH layers. For example, an SONET/SDH STE regenerator terminates SONET/SDH Sections only, and is transparent for all layers above that. SONET/SDH Add- Drop multiplexers and Digital Cross Connect Systems terminate SONET/SDH Lines. SONET/SDH Terminal Multiplexers may also terminate SONET/SDH Paths and VTs/VCs.

MIB II [6], as extended by [12], accommodates these cases by appropriate use of the MIB II system group, and the interfaces group. The system group can name and describe the type of managed resource. The interfaces group defines which SONET/SDH layers apply, how these layers are configured and multiplexed. This is achieved by proper representation of SONET/SDH Layers by ifEntries as defined in [12], as follows:

                    _____________________________
                   |             |          |    |  >
                   |             |          |    |  |
                   |             |          |    |  |
                   |_____________|__________|____|  >
                   |               |      |      |  >
                   |               |      |      |  |
                   |               |      |      |  |
                   |_______________|______|______|  >
                   |                             |  >
                   |                             |  |
                   |    Line                     |  |
                   |                             |  |
                   |_____________________________|  |
                   |                             |  |
                   |                             |  |
                   |    Section Layer            |   > 1 ifEntry
                   |                             |  |
                   |_____________________________|  |
                   |                             |  |
                   |                             |  |
                   |    Physical Medium Layer    |  |
                   |                             |  |
                   |_____________________________|  >
                   Use of ifTable for a SONET/SDH port

The exact configuration and multiplexing of the layers is maintained in the ifStackTable [12].

Use of ifTable for SONET/SDH Medium/Section/Line Layer

Only the ifGeneralGroup needs to be supported.

ifTable Object Use for combined SONET/SDH Medium/Section/Line Layer

==========================================================
       ifIndex           Interface index.
       ifDescr           SONET/SDH Medium/Section/Line
       ifType            sonet(39)
       ifSpeed           Speed of line rate for SONET/SDH,
                         (e.g., 155520000 bps).
       ifPhysAddress     The value of the Circuit Identifier.
                         If no Circuit Identifier has been assigned
                         this object should have an octet string with
                         zero length.
       ifAdminStatus     Supports read-only access.
                         The desired administrative status of the
                         interface.
       ifOperStatus      The value testing(3) is not used.
                         This object assumes the value down(2),
                         if the objects sonetSectionCurrentStatus
                         and sonetLineCurrentStatus have
                         any other value than sonetSectionNoDefect(1)
                         and sonetLineNoDefect(1), respectively.
       ifLastChange      sysUpTime at the last change in
                         ifOperStatus.
       ifName            Textual name of the interface or an
                         OCTET STRING of zero length.
       ifLinkUpDownTrapEnable   Set to enabled(1).
                                Supports read-only access.
       ifHighSpeed       Speed of line in Mega-bits per second
                         (e.g., 155 Mbps)
       ifConnectorPresent Set to true(1).

Use of ifTable for SONET/SDH Paths

Only the ifGeneralGroup needs to be supported.

      ifTable Object    Use for SONET/SDH Paths
      =========================================
       ifIndex           Interface index.
       ifDescr           SONET/SDH Path
       ifType            sonetPath(50)
       ifSpeed           set to speed of SONET/SDH path
                         (e.g., an STS-1 path has a
                         rate of 50112000 bps.)
       ifPhysAddress     Circuit Identifier or OCTET STRING of
                         zero length.
       ifAdminStatus     Supports read-only access.
                         The desired administrative status of the
                         interface.
       ifOperStatus      This object assumes the value down(2),
                         if the object sonetPathCurrentStatus has
                         any other value than sonetPathNoDefect(1).
       ifLastChange      sysUpTime at the last change in ifOperStatus.
       ifName            Textual name of the interface or an
                         OCTET STRING of zero length.
       ifLinkUpDownTrapEnable   Default value is disabled(2).
                                Just read-only access may be
                                supported.
       ifHighSpeed       Set to rate of SONET/SDH path
                         in Mega-bits per second.
       ifConnectorPresent Set to false(2).

Use of ifTable for SONET/SDH VTs/VCs

Only the ifGeneralGroup needs to be supported.

      ifTable Object    Use for SONET/SDH VTs/VCs
      ===========================================
       ifIndex           Interface index.
       ifDescr           SONET/SDH VT/VC
       ifType            sonetVT(51)
       ifSpeed           Set to speed of VT/VC
                         (e.g., a VT1.5 has a rate of
                         1728000 bps.)
       ifPhysAddress     Circuit Identifier or OCTET STRING of
                         zero length.
       ifAdminStatus     Supports read-only access.
                         The desired administrative status of the
                         interface.
       ifOperStatus      This object assumes the value down(2),
                         if the object sonetVTCurrentStatus has
                         any other value than sonetVTNoDefect(1).
       ifLastChange      sysUpTime at the last change in
                         ifOperStatus.
       ifName            Textual name of the interface or an
                         OCTET STRING of zero length.
       ifLinkUpDownTrapEnable   Default value is disabled(2).
                                Just read-only access may be
                                supported.
       ifHighSpeed       Set to rate of VT in Mega-bits per second.
       ifConnectorPresent Set to false(2).

SONET/SDH Terminology

The terminology used in this document to describe error conditions on a SONET circuit as monitored by a SONET system are from the ANSI T1M1.3/93-005R2 [11]. The terminology used in this document to describe error conditions on a SDH circuit as monitored by a SDH system are from the CCITT G.783 [18]. Only the SONET Performance Monitoring terminology is defined in this document. The definitions for SDH Performance Monitoring terms are similar but not identical, and they can be found in [18]. If the definition in this document does not match the definition in the ANSI T1M1.3/93-005R2 draft document, the implementer should follow the definition described in this document.

      Section Loss Of Frame Failure (Out of Frame Event, Severely
           Errored Frame Defect)
           An Out of Frame (OOF) event (or Severely Errored Frame
           defect) is the occurrence of four contiguous errored
           frame alignment words.  A frame alignment work occupies
           the A1 and A2 bytes of an STS frame, and is defined in
           T1.105.  The SEF defect is terminated when two contiguous
           error-free frame words are detected.  Any implementation
           of the frame recovery circuitry which achieves
           realignment following an OOF within the 250 microsecond
           (two frames) interval implied by this definition is
           acceptable.
           An Loss of Frame (LOF) defect is declared when an OOF/SEF
           defect persists for a period of 3 milliseconds.  The LOF
           defect is terminated when the incoming signal remains
           continuously in-frame for a period of 1 ms to 3 ms.
           An LOF failure is declared when the LOF defect persists
           for a period of 2.5 +/- 0.5 seconds, except when an LOS
           defect or failure is present.  The LOF failure is cleared
           when the LOS failure is declared, or when the LOF defect
           is absent for 10 +/- 0.5 seconds.
      Loss of Signal
           The Loss of Signal (LOS) defect is declared when no
           transitions are detected on the incoming signal (before
           descrambling).  The LOS defect is detected  upon
           observing 2.3 to 100 microseconds of no transitions.  The
           LOS defect is cleared after a 125 microsecond interval
           (one frame) during which no LOS defect is detected.
           The LOS failure is declared when the LOS defect persists
           for a period of 2.5 +/- 0.5 seconds, or if LOS defect is
           present when the criteria for LOF failure declaration
           have been met.  The LOS failure is cleared when the LOS
           defect is absent for a period of 10 +/- 0.5 seconds.
           Declaration of LOS failure clears any existing LOF
           failure.  Clearing the LOS failure allows immediate
           declaration of the LOF failure if conditions warrant.
      STS-Path Loss of Pointer
           An Loss of Pointer (LOP) defect is declared when either a
           valid pointer is not detected in eight consecutive
           frames, or when eight consecutive frames are detected
           with the New Data Flag (NDF) set to "1001" without a
           valid concatenation indicator (see ANSI T1.105).  A LOP
           defect is terminated when either a valid pointer with a
           normal NDF set to "0110", or a valid concatenation
           indicator is detected for three contiguous frames.
           Incoming STS-Path AIS shall not result in the declaration
           of a LOP defect.
           A STS-Path LOP failure is declared when the STS-Path LOP
           defect persists for a period of 2.5 +/- 0.5 seconds.  A
           STS-Path LOP failure is cleared when the STS-Path LOP
           defect is absent for 10 +/- 0.5 seconds.
      VT Loss of Pointer
           A VT LOP defect is declared when either a valid pointer
           is not detected in eight consecutive VT superframes, or
           when eight consecutive VT superframes are detected with
           the NDF set to "1001" without a valid concatenation
           indicator.  A VT LOP defect is terminated when either a
           valid pointer with a normal NDF set to "0110", or a valid
           concatenation indicator is detected for three contiguous
           VT superframes.  Incoming VT-Path AIS shall not result in
           declaring a VT LOP defect.
           A VT LOP failure is declared when the VT LOP defect
           persists for 2.5 +/- 0.5 seconds.  A VT LOP failure is
           cleared when the VT LOP defect is absent for 10 +/- 0.5
           seconds.
      Line Alarm Indication Signal
           A Line Alarm Indication Signal (L-AIS) is defined in ANSI
           T1.105.  The following criteria are specific to the L-AIS
           defect:
           --  Line AIS defect is detected as a "111" pattern in
           bits 6, 7, and 8 of the K2 byte in five consecutive
           frames.
           --  Line AIS defect is terminated when bits 6, 7, and 8
           of the K2 byte do not contain the code "111" for five
           consecutive frames.
           A Line AIS failure is declared when the Line AIS defect
           persists for a period of 20.5 +/- 0.5 seconds.  A Line
           AIS failure is cleared when the Line AIS defect is absent
           for 10 +/- 0.5 seconds.
      STS-Path Alarm Indication Signal
           The STS-Path Alarm Indication Signal (AIS) is defined in
           ANSI T1.105 as all ones in bytes H1, H2, and H3 as well
           as all ones in the entire STS SPE.  The following
           criteria are specific to the STS-Path AIS defect:
           -- STS-Path AIS defect is detected as all ones in bytes
           H1 and H2 in three contiguous frames.
           -- The STS-Path AIS defect is terminated when a valid STS
           Pointer is detected with the NDF set to "1001" (inverted)
           for one frame, or  "0110" (normal) for three contiguous
           frames.
           A STS-Path AIS failure is declared when the STS-Path AIS
           defect persists for 2.5 +/- 0.5 seconds.  A STS-Path AIS
           failure is cleared when the STS-Path AIS defect is absent
           for 10 +/- 0.5 seconds.
      VT-Path Alarm Indication Signal
           The VT-Path Alarm Indication Signal (AIS) is only
           applicable for VTs in the floating mode of operation.
           VT-Path AIS is used to alert the downstream VT Path
           Terminating Entity (PTE) of an upstream failure.  Upon
           detection of a failure, Line AIS, or STS-Path AIS, an STS
           PTE will generate downstream VT-Path AIS if the STS
           Synchronous Payload Envelope (SPE) is carrying floating
           VTs.  VT-Path AIS is specified in ANSI T1.105 as all ones
           in bytes V1, V2, V3, and V4, as well as all ones in the
           entire VT SPE.  The following criteria are specific to
           VT-Path AIS defect:
           --  VT-Path AIS defect is detected by a VT PTE as all
           ones in bytes V1 and V2 in three contiguous VT
           superframes.
           --  VT-Path AIS defect is terminated when valid VT
           pointer with a valid VT size is detected with the NDF set
           to "1001" (inverted) for one VT superframe, or "0110"
           (normal) for three contiguous VT superframes are
           detected.
           A VT-Path AIS failure is declared when the VT-Path AIS
           defect persists for 2.5 +/- 0.5 seconds.  A VT-Path AIS
           failure is cleared when the VT-Path AIS defect is absent
           for 10 +/- 0.5 seconds.
      Line Remote Defect Indication
           Line Remote Defect Indication (RDI) (aka Line FERF)
           signal is the occurrence of a "110" pattern in bit
           positions 6, 7, and 8 of the K2 byte in STS-1 #1 of the
           STS-N signal.  Line RDI is defined in ANSI T1.105.  The
           following criteria are specific to Line RDI defect:
           --  Line RDI defect is a "110" code in bits 6, 7, and 8
           of the K2 byte of in STS-1 #1 in five consecutive frames.
           --  Line RDI defect is terminated when any code other
           than "110" is detected in bits 6, 7, and 8 of the K2 byte
           in five consecutive frames.
           A Line Remote Failure Indication (RFI) failure is
           declared when the incoming Line RDI defects lasts for 2.5
           +/- 0.5 seconds.  The Line RFI failure is cleared when no
           Line RDI defects are detected for 10 +/- 0.5 seconds.
      STS-Path Remote Defect Indication
           STS-Path RDI (aka STS-Path FERF) signal shall be
           generated within 100 milliseconds by the STS PTE upon
           detection of an AIS or LOP defect.  Transmission of the
           STS-Path RDI signal shall cease within 100 milliseconds
           when the STS PTE no longer detects STS-Path AIS or STS-
           Path LOP defect.  The STS-Path RDI  shall accurately
           report the presence or absence of STS-Path AIS or STS-
           Path LOP defects.  STS-Path RDI defect is defined in ANSI
           T1.105.  The following requirements are specific to the
           STS-Path RDI defect:
           --  STS-Path RDI is detected by all STS PTEs.  STS-Path
           RDI is detected by the upstream STS PTE as a "1" in bit
           five of the Path Status byte (G1) for five contiguous
           frames.
           --  Removal of STS-Path Remote Defect Indication is
           detected by a "0" in bit 5 of the G1 byte in five
           contiguous frames.
           A STS-Path Remote Failure Indication (RFI) failure is
           declared when the incoming STS-Path RDI defects lasts for
           2.5 +/- 0.5 seconds.  The STS-Path RFI failure is cleared
           when no STS-Path RDI defects are detected for 10 +/- 0.5
           seconds.
      VT-Path Remote Defect Indication
           VT Path RDI (aka VT Path FERF) signal shall be generated
           within 100 milliseconds by the VT PTE upon detection of a
           VT-Path AIS or LOP defect.  Transmission of the VT-Path
           RDI signal shall cease within 100 milliseconds when the
           VT PTE no longer detects VT-Path AIS or VT-Path LOP
           defect.  The VT-Path RDI  shall accurately report the
           presence or absence of VT-Path AIS or VT-Path LOP
           defects.  VT-Path RDI defect is defined in ANSI T1.105.
           The following requirements are specific to VT-Path RDI
           defect:
           --  VT-Path RDI defect is the occurrence of a "1" in bit
           4 of the VT-Path Overhead byte (V5) in five contiguous
           frames.
           --  VT-Path RDI defect is terminated when a "0" is
           detected in bit 4 of the VT-Path Overhead byte (V5) for
           five contiguous frames.
           A VT-Path Remote Failure Indication (RFI) (derived)
           failure is declared when the incoming VT-Path RDI defects
           lasts for 2.5 +/- 0.5 seconds.  The VT-Path RFI failure
           is cleared when no VT-Path RDI defects are detected for
           10 +/- 0.5 seconds.
      VT-Path Remote Failure Indication
           The VT-Path RFI signal is only required for the case of
           byte synch mapped DS1s where the DS1 frame bit is not
           mapped.  The VT-Path RFI is specified in ANSI T1.105,
           where it is currently called VT path yellow.  When
           provided, the VT-Path RFI signal is used to indicate the
           occurrence of far-end failures.  When the VT-Path RFI is
           not provided, far-end failures are derived from local
           timing of the VT-Path RDI defect.  The VT-Path RFI
           failure is declared within 5 ms of detecting the incoming
           VT-Path RFI Signal.  The VT-Path Remote Failure
           Indication (RFI) failure is cleared within 50 ms of
           detecting the removal of the incoming VT-Path RFI signal.
      Coding Violation
           Coding Violations (CV) are Bit Interleaved Parity (BIP)
           errors that are detected in the incoming signal.  CV
           counters are incremented for each BIP error detected.
           That is, each BIP-8 can detect up to eight errors per
           STS-N frame, with each error incrementing the CV counter.
           Section CVs shall be collected using the BIP-8 in the B1
           byte located in the Section Overhead of STS-1 #1.  Line
           CVs shall be collected using the BIP-8s in B2 bytes
           located in the Line Overhead of each STS-1 (since all CVs
           on an STS-N line are counted together, this is equivalent
           to counting each error in the BIP-8*N contained in the B2
           bytes of the STS-N Line Overhead).  Thus, on an STS-N
           signal, up to 8 x N CVs may occur in each frame.  Path
           CVs shall be collected using the BIP-8 in the B3 byte of
           the STS-Path Overhead of the STS SPE.  VT CVs shall be
           collected using the BIP-2 in the V5 overhead byte of the
           floating VT.
      Errored Seconds
           At each layer, an Errored Second (ES) is a second with
           one or more Coding Violations at that layer OR one or
           more incoming defects (e.g., SEF, LOS, AIS, LOP) at that
           layer has occurred.
      Severely Errored Seconds
           At each layer, an Severely Errored Second (SES) is a
           second with x or more CVs at that layer, or a second
           during which at least one or more incoming defects at
           that layer has occurred.  Values of x vary depending on
           the line rate and the Bit Error Rate.  See Section 3.4
           for values for x.
      Severely Errored Framing Seconds
           A Severely Errored Framing Second (SEFS) is a seconds
           with containing one or more SEF events.  This counter is
           only counted at the Section Layer.
      Unavailable Seconds
           At the Line, Path, and VT layers, an unavailable second
           is calculated by counting the number of seconds that the
           interface is unavailable.  At each layer, the SONET/SDH
           interface is said to be unavailable at the onset of 10
           contiguous SESs.  The 10 SESs are included in unavailable
           time.  Once unavailable, the SONET/SDH interface becomes
           available at the onset of 10 contiguous seconds with no
           SESs.  The 10 seconds with no SESs are excluded from
           unavailable time.  With respect to the SONET/SDH error
           counts at each layer, all counters at that layer are
           incremented while the SONET/SDH interface is deemed
           available at that layer.  While the interface is deemed
           unavailable at that layer, the only count that is
           incremented is UASs at that layer.
           A special case exists when the 10 or more second period
           crosses the 900 second statistics window boundary, as the
           foregoing description implies that the SES and UAS
           counters must be adjusted when the Unavailable Signal
           State is entered. Clearly, successive GETs of the
           affected sonetPathIntervalSES and sonetPathIntervalUAS
           (for the Line and VT also) objects will return differing
           values if the first GET occurs during the first few
           seconds of the window.  This is viewed as an unavoidable
           side-effect of selecting the presently defined managed
           objects as a basis for this memo.
      Unequipped
           If a Path or VT connection is not provisioned (idle) the
           SONET equipment will signal this state by transmitting
           the Path or VT Signal Label as follows:
           - byte C2 of the STS Path Overhead equal to 0 for an
           unequipped Path,
           - byte V5 of the VT Path Overhead equal to 0 for an
           unequipped VT.
      Signal Label Mismatch
           A Path or VT connection is not correctly provisioned if a
           received Path or VT Signal Label mismatch occurs.  A
           received Signal Label is considered mismatched if it does
           not equal either the locally provisioned value or the
           value 'equipped non-specific' (1 hex). Note that any
           received non-zero Signal Label is considered a locally
           provisioned value of 'equipped non-specific'.  Only in-
           service, provisioned Path Terminating equipment can
           detect mismatched Signal labels. It is considered
           provisioned if it has been configured for a mapping and
           has been assigned signals to and from which the mapping
           takes place.
      Circuit Identifier
           This is a character string specified by the circuit
           vendor, and is useful when communicating with the vendor
           during the troubleshooting process.

Values for x for the Section, Line, Path, and VT Layers

                Value for x for SONET/SDH Section SES Definition
           Rate            x               Minimum Bit Error Rate
           =======================================================
           OC-1             9                      1.5 x 10^-7
           0C-3            16                        1 x 10^-7
           OC-9            47                        1 x 10^-7
           OC-12           63                        1 x 10^-7
           OC-18           94                        1 x 10^-7
           OC-24          125                        1 x 10^-7
           OC-36          187                        1 x 10^-7
           OC-48          249                        1 x 10^-7
                Value for x for SONET/SDH Line SES Definition
           Rate            x               Minimum Bit Error Rate
           =======================================================
           OC-1            12                       2 x 10^-7
           0C-3            32                       2 x 10^-7
           OC-9            94                       2 x 10^-7
           OC-12          124                       2 x 10^-7
           OC-18          186                       2 x 10^-7
           OC-24          248                       2 x 10^-7
           OC-36          370                       2 x 10^-7
           OC-48          494                       2 x 10^-7
                Value for x for SONET/SDH STS-Path SES Definition
           Rate            x               Minimum Bit Error Rate
           =======================================================
           STS-1            9                       1.5 x 10^-7
           STS-3           16                         1 x 10^-7
                Value for x for SONET/SDH VT-Path SES Definition
           Rate            x               Minimum Bit Error Rate
           =======================================================
           VT1.5            4                       2 x 10^-6
           VT2              6                       2 x 10^-6
           VT3              8                       2 x 10^-6
           VT6             14                       2 x 10^-6

Object Definitions

      SONET-MIB DEFINITIONS ::= BEGIN
      IMPORTS
          MODULE-IDENTITY, OBJECT-TYPE, Counter32, Gauge32,
          Integer32,
                FROM SNMPv2-SMI
          TEXTUAL-CONVENTION, DisplayString
                FROM SNMPv2-TC
          MODULE-COMPLIANCE, OBJECT-GROUP
                FROM SNMPv2-CONF
          ifIndex, transmission
                FROM RFC-1213;
      --  This is the MIB module for the SMDS Interface objects.
      sonetMIB MODULE-IDENTITY
          LAST-UPDATED "9401030000Z"
          ORGANIZATION "IETF AToM MIB Working Group"
          CONTACT-INFO
            "        Tracy Brown
             Postal: Bell Communications Research
                     331 Newman Springs Road
                     P.O. Box 7020
                     Red Bank, NJ  07701-7020
                     US
                Tel: +1 908 758 2107
                Fax: +1 908 758 4177
             E-mail: [email protected]
                     Kaj Tesink
             Postal: Bell Communications Research
                     331 Newman Springs Road
                     P.O. Box 7020
                     Red Bank, NJ  07701-7020
                     US
                Tel: +1 908 758 5254
                Fax: +1 908 758 4196
             E-mail: [email protected]"
          DESCRIPTION
               "The MIB module to describe
               SONET/SDH interfaces objects."
          ::= { transmission 39 }
      --  This is the MIB module for the SONET/SDH objects
      sonetObjects      OBJECT IDENTIFIER ::= { sonetMIB 1 }
      sonetObjectsPath  OBJECT IDENTIFIER ::= { sonetMIB 2 }
      sonetObjectsVT    OBJECT IDENTIFIER ::= { sonetMIB 3 }
      -- groups in the SONET/SDH MIB module
      sonetMedium       OBJECT IDENTIFIER ::= { sonetObjects 1 }
      sonetSection      OBJECT IDENTIFIER ::= { sonetObjects 2 }
      sonetLine         OBJECT IDENTIFIER ::= { sonetObjects 3 }
      sonetFarEndLine   OBJECT IDENTIFIER ::= { sonetObjects 4 }
      sonetPath         OBJECT IDENTIFIER ::= { sonetObjectsPath 1 }
      sonetFarEndPath   OBJECT IDENTIFIER ::= { sonetObjectsPath 2 }
      sonetVT           OBJECT IDENTIFIER ::= { sonetObjectsVT 1 }
      sonetFarEndVT     OBJECT IDENTIFIER ::= { sonetObjectsVT 2 }
      -- the SONET/SDH Medium group
      -- SONET/SDH interfaces for some applications may be
      -- electrical interfaces and not optical interfaces.
      -- This group handles the configuration information for
      -- both optical SONET/SDH interfaces and electrical
      -- SONET/SDH interfaces.
      sonetMediumTable OBJECT-TYPE
          SYNTAX  SEQUENCE OF SonetMediumEntry
          MAX-ACCESS  not-accessible
          STATUS  current
          DESCRIPTION
             "The SONET/SDH Medium table."
           ::= { sonetMedium 1 }
      sonetMediumEntry OBJECT-TYPE
          SYNTAX  SonetMediumEntry
          MAX-ACCESS  not-accessible
          STATUS  current
          DESCRIPTION
             "An entry in the SONET/SDH Medium table."
          INDEX   { ifIndex }
           ::= { sonetMediumTable 1 }
      SonetMediumEntry ::=
          SEQUENCE {
               sonetMediumType               INTEGER,
               sonetMediumTimeElapsed        Integer32,
               sonetMediumValidIntervals     Integer32,
               sonetMediumLineCoding         INTEGER,
               sonetMediumLineType           INTEGER,
               sonetMediumCircuitIdentifier  DisplayString
          }
      sonetMediumType OBJECT-TYPE
          SYNTAX  INTEGER  {
                     sonet(1),
                     sdh(2)
                  }
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
             "This variable identifies whether a SONET
             or a SDH signal is used across this interface."
          ::= { sonetMediumEntry 1 }
      sonetMediumTimeElapsed OBJECT-TYPE
          SYNTAX  Integer32 (1..900)
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
             "The number of seconds, including partial
             seconds, that have elapsed since the beginning of
             the current error-measurement period."
          ::= { sonetMediumEntry 2 }
      sonetMediumValidIntervals OBJECT-TYPE
          SYNTAX  Integer32 (0..96)
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
             "The number of previous intervals for which valid
             data has been stored.  A SONET device must support
             at least n intervals.
             The minimum value of n is 4.
             The default of n is 32.
             The maximum value of n is 96.
             The value of this object will be n unless
             the device was brought online within the last
             (nx15) minutes, in which case the value will be the
             number of complete 15 minute intervals the device has
             been online."
          ::= { sonetMediumEntry 3 }
      sonetMediumLineCoding OBJECT-TYPE
          SYNTAX  INTEGER {
                      sonetMediumOther(1),
                      sonetMediumB3ZS(2),
                      sonetMediumCMI(3),
                      sonetMediumNRZ(4),
                      sonetMediumRZ(5)
                  }
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
             "This variable describes the line coding for
             this interface. The B3ZS and CMI are used for
             electrical SONET/SDH signals (STS-1 and STS-3).
             The Non-Return to Zero (NRZ) and the Return
             to Zero are used for optical SONET/SDH signals."
          ::= { sonetMediumEntry 4 }
      sonetMediumLineType OBJECT-TYPE
          SYNTAX  INTEGER {
                      sonetOther(1),
                      sonetShortSingleMode(2),
                      sonetLongSingleMode(3),
                      sonetMultiMode(4),
                      sonetCoax(5),
                      sonetUTP(6)
                  }
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
             "This variable describes the line type for
             this interface. The line types are
             Short and Long Range
             Single Mode fiber or Multi-Mode fiber interfaces,
             and coax and UTP for electrical interfaces.  The
             value sonetOther should be used when the Line Type is
             not one of the listed values."
          ::= { sonetMediumEntry 5 }
      sonetMediumCircuitIdentifier OBJECT-TYPE
          SYNTAX  DisplayString (SIZE (0..255))
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
             "This variable contains the transmission
             vendor's circuit identifier, for the
             purpose of facilitating troubleshooting."
          ::= { sonetMediumEntry 6 }
      -- the SONET/SDH Section group
      -- this group consists of 2 tables:
      -- - the SONET/SDH Section Current Table
      -- - the SONET/SDH Section Interval Table
      -- the SONET/SDH Section Current Table
      -- The SONET/SDH Section
      -- current table contains various statistics
      -- being collected for the current 15 minute interval.
      sonetSectionCurrentTable OBJECT-TYPE
          SYNTAX  SEQUENCE OF SonetSectionCurrentEntry
          MAX-ACCESS  not-accessible
          STATUS  current
          DESCRIPTION
             "The SONET/SDH Section Current table."
           ::= { sonetSection 1 }
      sonetSectionCurrentEntry OBJECT-TYPE
          SYNTAX  SonetSectionCurrentEntry
          MAX-ACCESS  not-accessible
          STATUS  current
          DESCRIPTION
             "An entry in the SONET/SDH Section Current table."
          INDEX   { ifIndex }
           ::= { sonetSectionCurrentTable 1 }
      SonetSectionCurrentEntry ::=
          SEQUENCE {
              sonetSectionCurrentStatus   Integer32,
              sonetSectionCurrentESs      Gauge32,
              sonetSectionCurrentSESs     Gauge32,
              sonetSectionCurrentSEFSs    Gauge32,
              sonetSectionCurrentCVs      Gauge32
          }
      sonetSectionCurrentStatus OBJECT-TYPE
          SYNTAX  Integer32 (1..6)
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
             "This variable indicates the
             status of the interface.
             The sonetSectionCurrentStatus
             is a bit map represented
             as a sum, therefore,
             it can represent multiple defects
             simultaneously.
             The sonetSectionNoDefect should be
             set if and only if
             no other flag is set.
             The various bit positions are:
                   1   sonetSectionNoDefect
                   2   sonetSectionLOS
                   4   sonetSectionLOF"
           ::= { sonetSectionCurrentEntry 1 }
      sonetSectionCurrentESs OBJECT-TYPE
          SYNTAX  Gauge32
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
             "The counter associated with the number of Errored
             Seconds encountered by a SONET/SDH
             Section in the current 15 minute interval."
           ::= { sonetSectionCurrentEntry 2 }
      sonetSectionCurrentSESs OBJECT-TYPE
          SYNTAX  Gauge32
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
             "The counter associated with the number of
             Severely Errored Seconds
             encountered by a SONET/SDH Section in the current 15
             minute interval."
           ::= { sonetSectionCurrentEntry 3 }
      sonetSectionCurrentSEFSs OBJECT-TYPE
          SYNTAX  Gauge32
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
             "The counter associated with the number of
             Severely Errored Framing Seconds
             encountered by a SONET/SDH Section in the current
             15 minute interval."
          ::= { sonetSectionCurrentEntry 4 }
      sonetSectionCurrentCVs OBJECT-TYPE
          SYNTAX  Gauge32
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
             "The counter associated with the number of Coding
             Violations encountered by a
             SONET/SDH Section in the current 15 minute interval."
           ::= { sonetSectionCurrentEntry 5 }
      -- the SONET/SDH Section Interval Table
      -- The SONET/SDH Section Interval Table
      -- contains various statistics
      -- collected by each system over a maximum
      -- of the previous 24 hours of
      -- operation.  The past 24 hours may be broken into 96
      -- completed 15 minute intervals.
      -- A system is required to store at
      -- least 4 completed 15 minute interval.
      -- The default value is 32 intervals.
      sonetSectionIntervalTable OBJECT-TYPE
          SYNTAX  SEQUENCE OF SonetSectionIntervalEntry
          MAX-ACCESS  not-accessible
          STATUS  current
          DESCRIPTION
             "The SONET/SDH Section Interval table."
           ::= { sonetSection 2 }
      sonetSectionIntervalEntry OBJECT-TYPE
          SYNTAX  SonetSectionIntervalEntry
          MAX-ACCESS  not-accessible
          STATUS  current
          DESCRIPTION
             "An entry in the SONET/SDH Section Interval table."
          INDEX   { ifIndex,
                    sonetSectionIntervalNumber }
           ::= { sonetSectionIntervalTable 1 }
      SonetSectionIntervalEntry ::=
          SEQUENCE {
               sonetSectionIntervalNumber  Integer32,
               sonetSectionIntervalESs     Gauge32,
               sonetSectionIntervalSESs    Gauge32,
               sonetSectionIntervalSEFSs   Gauge32,
               sonetSectionIntervalCVs     Gauge32
          }
      sonetSectionIntervalNumber OBJECT-TYPE
          SYNTAX  Integer32 (1..96)
          MAX-ACCESS  not-accessible
          STATUS  current
          DESCRIPTION
            "A number between 1 and 96, which identifies the
            interval for which the set of statistics is available.
            The interval identified by 1 is the most recently
            completed 15 minute interval,
            and the interval identified
            by N is the interval immediately preceding the
            one identified
            by N-1."
           ::= { sonetSectionIntervalEntry 1 }
      sonetSectionIntervalESs OBJECT-TYPE
          SYNTAX  Gauge32
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
             "The counter associated with the number of
             Errored Seconds encountered
             by a SONET/SDH Section in a
             particular 15-minute interval
             in the past 24 hours."
           ::= { sonetSectionIntervalEntry 2 }
      sonetSectionIntervalSESs OBJECT-TYPE
          SYNTAX  Gauge32
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
             "The counter associated with the number of
             Severely Errored Seconds
             encountered by a SONET/SDH Section in a
             particular 15-minute interval
             in the past 24 hours."
          ::= { sonetSectionIntervalEntry 3 }
      sonetSectionIntervalSEFSs OBJECT-TYPE
          SYNTAX  Gauge32
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
             "The counter associated with the number of
             Severely Errored Framing Seconds
             encountered by a SONET/SDH Section in a
             particular 15-minute interval
             in the past 24 hours."
          ::= { sonetSectionIntervalEntry 4 }
      sonetSectionIntervalCVs OBJECT-TYPE
          SYNTAX  Gauge32
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
             "The counter associated with the number of Coding
             Violations encountered by a
             SONET/SDH Section in a particular 15-minute interval
             in the past 24 hours."
          ::= { sonetSectionIntervalEntry 5 }
      -- the SONET/SDH Line group
      -- this group consists of 2 tables:
      -- - the SONET/SDH Line Current Table
      -- - the SONET/SDH Line Interval Table
      -- the SONET/SDH Line Current Table
      -- The SONET/SDH Line
      -- current table contains various statistics
      -- being collected for the current 15 minute interval.
      sonetLineCurrentTable OBJECT-TYPE
          SYNTAX  SEQUENCE OF SonetLineCurrentEntry
          MAX-ACCESS  not-accessible
          STATUS  current
          DESCRIPTION
            "The SONET/SDH Line Current table."
          ::= { sonetLine 1 }
      sonetLineCurrentEntry OBJECT-TYPE
          SYNTAX  SonetLineCurrentEntry
          MAX-ACCESS  not-accessible
          STATUS  current
          DESCRIPTION
            "An entry in the SONET/SDH Line Current table."
          INDEX   { ifIndex }
          ::= { sonetLineCurrentTable 1 }
      SonetLineCurrentEntry ::=
          SEQUENCE {
               sonetLineCurrentStatus    Integer32,
               sonetLineCurrentESs       Gauge32,
               sonetLineCurrentSESs      Gauge32,
               sonetLineCurrentCVs       Gauge32,
               sonetLineCurrentUASs      Gauge32
           }
      sonetLineCurrentStatus OBJECT-TYPE
          SYNTAX  Integer32 (1..6)
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
             "This variable indicates the
             status of the interface.
             The sonetLineCurrentStatus
             is a bit map represented
             as a sum, therefore,
             it can represent multiple defects
             simultaneously.
             The sonetLineNoDefect should be
             set if and only if
             no other flag is set.
             The various bit positions are:
              1   sonetLineNoDefect
              2   sonetLineAIS
              4   sonetLineRDI"
           ::= { sonetLineCurrentEntry 1 }
      sonetLineCurrentESs OBJECT-TYPE
          SYNTAX  Gauge32
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
           "The counter associated with the number of Errored
           Seconds encountered by a SONET/SDH
           Line in the current 15 minute interval."
          ::= { sonetLineCurrentEntry 2 }
      sonetLineCurrentSESs OBJECT-TYPE
          SYNTAX  Gauge32
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
           "The counter associated with the number of
           Severely Errored Seconds
           encountered by a SONET/SDH Line in the current 15
           minute
           interval."
          ::= { sonetLineCurrentEntry 3 }
      sonetLineCurrentCVs OBJECT-TYPE
          SYNTAX  Gauge32
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
           "The counter associated with the number of Coding
           Violations encountered by a
           SONET/SDH Line in the current 15 minute interval."
          ::= { sonetLineCurrentEntry 4 }
      sonetLineCurrentUASs OBJECT-TYPE
          SYNTAX  Gauge32
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
           "The counter associated with the number of
           Unavailable Seconds
           encountered by a SONET/SDH Line in the current 15
           minute
           interval."
          ::= { sonetLineCurrentEntry 5 }
      -- the SONET/SDH Line Interval Table
      -- The SONET/SDH Line Interval Table
      -- contains various statistics
      -- collected by each system over a maximum
      -- of the previous 24 hours of
      -- operation.  The past 24 hours may be broken into 96
      -- completed 15 minute intervals.
      -- A system is required to store at
      -- least 4 completed 15 minute interval.
      -- The default value is 32 intervals.
      sonetLineIntervalTable OBJECT-TYPE
          SYNTAX  SEQUENCE OF SonetLineIntervalEntry
          MAX-ACCESS  not-accessible
          STATUS  current
          DESCRIPTION
             "The SONET/SDH Line Interval table."
           ::= { sonetLine 2 }
      sonetLineIntervalEntry OBJECT-TYPE
          SYNTAX  SonetLineIntervalEntry
          MAX-ACCESS  not-accessible
          STATUS  current
          DESCRIPTION
             "An entry in the SONET/SDH Line Interval table."
         INDEX   { ifIndex,
                   sonetLineIntervalNumber }
         ::= { sonetLineIntervalTable 1 }
      SonetLineIntervalEntry ::=
          SEQUENCE {
              sonetLineIntervalNumber    Integer32,
              sonetLineIntervalESs       Gauge32,
              sonetLineIntervalSESs      Gauge32,
              sonetLineIntervalCVs       Gauge32,
              sonetLineIntervalUASs      Gauge32
          }
      sonetLineIntervalNumber OBJECT-TYPE
          SYNTAX  Integer32 (1..96)
          MAX-ACCESS  not-accessible
          STATUS  current
          DESCRIPTION
              "A number between 1 and 96, which identifies the
              interval for which the set of statistics is available.
              The interval identified by 1 is the most recently
              completed 15 minute interval,
              and the interval identified
              by N is the interval immediately preceding the
              one identified
              by N-1."
           ::= { sonetLineIntervalEntry 1 }
      sonetLineIntervalESs OBJECT-TYPE
          SYNTAX  Gauge32
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
             "The counter associated with the number of
             Errored Seconds encountered
             by a SONET/SDH Line in a
             particular 15-minute interval
             in the past 24 hours."
           ::= { sonetLineIntervalEntry 2 }
      sonetLineIntervalSESs OBJECT-TYPE
          SYNTAX  Gauge32
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
             "The counter associated with the number of
             Severely Errored Seconds
             encountered by a SONET/SDH Line in a
             particular 15-minute interval
             in the past 24 hours."
            ::= { sonetLineIntervalEntry 3 }
      sonetLineIntervalCVs OBJECT-TYPE
          SYNTAX  Gauge32
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
            "The counter associated with the number of Coding
            Violations encountered by a
            SONET/SDH Line in a
            particular 15-minute interval
            in the past 24 hours."
          ::= { sonetLineIntervalEntry 4 }
      sonetLineIntervalUASs OBJECT-TYPE
          SYNTAX  Gauge32
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
            "The counter associated with the
            number of Unavailable Seconds
            encountered by a SONET/SDH Line in
            a particular 15-minute interval
            in the past 24 hours."
          ::= { sonetLineIntervalEntry 5 }
      -- The SONET/SDH Far End Line group.
      -- This group may only be implemented by SONET/SDH (LTEs)
      -- systems that provide for a far end block error (FEBE)
      -- information at the SONET/SDH Line Layer.
      -- This group consists of two tables:
      --    SONET/SDH Far End Line Current Table
      --    SONET/SDH Far End Line Interval Table
      -- The SONET/SDH Far End Line Current Table
      -- The SONET/SDH Far End Line Current table contains
      -- various statistics being
      -- collected for the current 15 minute interval.
      -- The statistics are collected from the far end
      -- block error code (FEBE)
      -- within the third Z2 byte of the Line Overhead
      -- in Broadband ISDN applications.
      -- The definitions are the same as described for
      -- the near-end information.
      sonetFarEndLineCurrentTable OBJECT-TYPE
          SYNTAX  SEQUENCE OF SonetFarEndLineCurrentEntry
          MAX-ACCESS  not-accessible
          STATUS  current
          DESCRIPTION
            "The SONET/SDH Far End Line Current table."
          ::= { sonetFarEndLine 1 }
      sonetFarEndLineCurrentEntry OBJECT-TYPE
          SYNTAX  SonetFarEndLineCurrentEntry
          MAX-ACCESS  not-accessible
          STATUS  current
          DESCRIPTION
            "An entry in the SONET/SDH Far End Line Current table."
          INDEX   { ifIndex }
          ::= { sonetFarEndLineCurrentTable 1 }
      SonetFarEndLineCurrentEntry ::=
          SEQUENCE {
              sonetFarEndLineCurrentESs       Gauge32,
              sonetFarEndLineCurrentSESs      Gauge32,
              sonetFarEndLineCurrentCVs       Gauge32,
              sonetFarEndLineCurrentUASs      Gauge32
             }
      sonetFarEndLineCurrentESs OBJECT-TYPE
         SYNTAX  Gauge32
         MAX-ACCESS  read-only
         STATUS  current
         DESCRIPTION
             "The counter associated with the number of Far
             Far End Errored Seconds encountered by a SONET/SDH
             interface in the current 15 minute interval."
         ::= { sonetFarEndLineCurrentEntry 1 }
      sonetFarEndLineCurrentSESs OBJECT-TYPE
         SYNTAX  Gauge32
         MAX-ACCESS  read-only
         STATUS  current
         DESCRIPTION
             "The counter associated with the number of
             Far End Severely Errored Seconds
             encountered by a SONET/SDH Medium/Section/Line
             interface in the current 15 minute
             interval."
         ::= { sonetFarEndLineCurrentEntry 2 }
      sonetFarEndLineCurrentCVs OBJECT-TYPE
         SYNTAX  Gauge32
         MAX-ACCESS  read-only
         STATUS  current
         DESCRIPTION
             "The counter associated with the number of
             Far End Coding Violations reported via
             the far end block error count
             encountered by a
             SONET/SDH Medium/Section/Line
             interface in the current 15 minute interval."
         ::= { sonetFarEndLineCurrentEntry 3 }
      sonetFarEndLineCurrentUASs OBJECT-TYPE
         SYNTAX  Gauge32
         MAX-ACCESS  read-only
         STATUS  current
         DESCRIPTION
             "The counter associated with the number of
             Far End Unavailable Seconds
             encountered by a
             SONET/SDH Medium/Section/Line
             interface in the current 15 minute interval."
         ::= { sonetFarEndLineCurrentEntry 4 }
      -- The SONET/SDH Far End Line Interval Table
      -- The SONET/SDH Far End Line Interval Table
      -- contains various statistics
      -- collected by each system over a maximum
      -- of the previous 24 hours of
      -- operation.  The past 24 hours may be broken into 96
      -- completed 15 minute intervals.
      -- A system is required to store at
      -- least 4 completed 15 minute interval.
      -- The default value is 32 intervals.
      sonetFarEndLineIntervalTable OBJECT-TYPE
         SYNTAX  SEQUENCE OF SonetFarEndLineIntervalEntry
         MAX-ACCESS  not-accessible
         STATUS  current
         DESCRIPTION
            "The SONET/SDH Far End Line Interval table."
         ::= { sonetFarEndLine 2 }
      sonetFarEndLineIntervalEntry OBJECT-TYPE
         SYNTAX  SonetFarEndLineIntervalEntry
         MAX-ACCESS  not-accessible
         STATUS  current
         DESCRIPTION
           "An entry in the SONET/SDH Far
           End Line Interval table."
         INDEX   { ifIndex,
                   sonetFarEndLineIntervalNumber }
         ::= { sonetFarEndLineIntervalTable 1 }
      SonetFarEndLineIntervalEntry ::=
          SEQUENCE {
               sonetFarEndLineIntervalNumber    Integer32,
               sonetFarEndLineIntervalESs       Gauge32,
               sonetFarEndLineIntervalSESs      Gauge32,
               sonetFarEndLineIntervalCVs       Gauge32,
               sonetFarEndLineIntervalUASs      Gauge32
          }
      sonetFarEndLineIntervalNumber OBJECT-TYPE
         SYNTAX  Integer32 (1..96)
         MAX-ACCESS  not-accessible
         STATUS  current
         DESCRIPTION
               "A number between 1 and 96, which identifies the
               interval for which the set of statistics is available.
               The interval identified by 1 is the most recently
               completed 15 minute interval,
               and the interval identified
               by N is the interval immediately preceding the
               one identified
               by N-1."
         ::= { sonetFarEndLineIntervalEntry 1 }
      sonetFarEndLineIntervalESs OBJECT-TYPE
         SYNTAX  Gauge32
         MAX-ACCESS  read-only
         STATUS  current
         DESCRIPTION
              "The counter associated with the number of
              Far End Errored Seconds encountered
              by a SONET/SDH Line
              interface in a particular 15-minute interval
              in the past 24 hours."
        ::= { sonetFarEndLineIntervalEntry 2 }
      sonetFarEndLineIntervalSESs OBJECT-TYPE
         SYNTAX  Gauge32
         MAX-ACCESS  read-only
         STATUS  current
         DESCRIPTION
              "The counter associated with the number of
              Far End Severely Errored Seconds
              encountered by a SONET/SDH Line
              interface in a particular 15-minute interval
              in the past 24 hours."
        ::= { sonetFarEndLineIntervalEntry 3 }
      sonetFarEndLineIntervalCVs OBJECT-TYPE
          SYNTAX  Gauge32
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
               "The counter associated with the number of
               Far End Coding Violations reported via
               the far end block error count
               encountered by a
               SONET/SDH Line
               interface in a particular 15-minute interval
               in the past 24 hours."
          ::= { sonetFarEndLineIntervalEntry 4 }
      sonetFarEndLineIntervalUASs OBJECT-TYPE
         SYNTAX  Gauge32
         MAX-ACCESS  read-only
         STATUS  current
         DESCRIPTION
             "The counter associated with the number of
             Far End Unavailable Seconds
             encountered by a
             SONET/SDH Line
             interface in a particular 15-minute interval
             in the past 24 hours."
         ::= { sonetFarEndLineIntervalEntry 5 }
      -- the SONET/SDH Path group
      -- this group consists of 2 tables:
      -- - the SONET/SDH Path Current Table
      -- - the SONET/SDH Path Interval Table
      -- the SONET/SDH Path Current Table
      -- The SONET/SDH Path
      -- current table contains various statistics
      -- being collected for the current 15 minute interval.
      sonetPathCurrentTable OBJECT-TYPE
          SYNTAX  SEQUENCE OF SonetPathCurrentEntry
          MAX-ACCESS  not-accessible
          STATUS  current
          DESCRIPTION
           "The SONET/SDH Path Current table."
      ::= { sonetPath 1 }
      sonetPathCurrentEntry OBJECT-TYPE
          SYNTAX  SonetPathCurrentEntry
          MAX-ACCESS  not-accessible
          STATUS  current
          DESCRIPTION
           "An entry in the SONET/SDH Path Current table."
          INDEX   { ifIndex }
      ::= { sonetPathCurrentTable 1 }
      SonetPathCurrentEntry ::=
          SEQUENCE {
              sonetPathCurrentWidth      INTEGER,
              sonetPathCurrentStatus     Integer32,
              sonetPathCurrentESs        Gauge32,
              sonetPathCurrentSESs       Gauge32,
              sonetPathCurrentCVs        Gauge32,
              sonetPathCurrentUASs       Gauge32
          }
      sonetPathCurrentWidth OBJECT-TYPE
          SYNTAX  INTEGER  {
                  sts1(1),
                  sts3cSTM1(2),
                  sts12cSTM4(3),
                  sts24c(4),
                  sts48cSTM16(5)
           }
          MAX-ACCESS  read-write
          STATUS  current
          DESCRIPTION
           "A value that indicates the type of the SONET/SDH
           Path.  For SONET, the assigned types are
           the STS-Nc SPEs, where N = 1, 3, 12, 24, and 48.
           STS-1 is equal to 51.84 Mbps.  For SDH, the assigned
           types are the STM-Nc VCs, where N = 1, 4, and 16."
      ::= { sonetPathCurrentEntry 1 }
      sonetPathCurrentStatus OBJECT-TYPE
          SYNTAX  Integer32 (1..14)
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
            "This variable indicates the
            status of the interface.
            The sonetPathCurrentStatus
            is a bit map represented
            as a sum, therefore,
            it can represent multiple defects
            simultaneously.
            The sonetPathNoDefect should be
            set if and only if
            no other flag is set.
            The various bit positions are:
               1   sonetPathNoDefect
               2   sonetPathSTSLOP
               4   sonetPathSTSAIS
               8   sonetPathSTSRDI
              16   sonetPathUnequipped
              32   sonetPathSignalLabelMismatch"
      ::= { sonetPathCurrentEntry 2 }
      sonetPathCurrentESs OBJECT-TYPE
          SYNTAX  Gauge32
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
           "The counter associated with the number of Errored
           Seconds encountered by a SONET/SDH
           Path in the current 15 minute interval."
      ::= { sonetPathCurrentEntry 3 }
      sonetPathCurrentSESs OBJECT-TYPE
          SYNTAX  Gauge32
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
           "The counter associated with the number of
           Severely Errored Seconds
           encountered by a SONET/SDH Path in the current 15
           minute
           interval."
      ::= { sonetPathCurrentEntry 4 }
      sonetPathCurrentCVs OBJECT-TYPE
          SYNTAX  Gauge32
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
           "The counter associated with the number of Coding
           Violations encountered by a
           SONET/SDH Path in the current 15 minute interval."
      ::= { sonetPathCurrentEntry 5 }
      sonetPathCurrentUASs OBJECT-TYPE
          SYNTAX  Gauge32
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
           "The counter associated with the number of
           Unavailable Seconds
           encountered by a Path in the current
           15 minute, interval."
      ::= { sonetPathCurrentEntry 6 }
      -- the SONET/SDH Path Interval Table
      -- The SONET/SDH Path Interval Table
      -- contains various statistics
      -- collected by each system over a maximum
      -- of the previous 24 hours of
      -- operation.  The past 24 hours may be broken into 96
      -- completed 15 minute intervals.
      -- A system is required to store at
      -- least 4 completed 15 minute interval.
      -- The default value is 32 intervals.
      sonetPathIntervalTable OBJECT-TYPE
          SYNTAX  SEQUENCE OF SonetPathIntervalEntry
          MAX-ACCESS  not-accessible
          STATUS  current
          DESCRIPTION
           "The SONET/SDH Path Interval table."
      ::= { sonetPath 2 }
      sonetPathIntervalEntry OBJECT-TYPE
          SYNTAX  SonetPathIntervalEntry
          MAX-ACCESS  not-accessible
          STATUS  current
          DESCRIPTION
           "An entry in the SONET/SDH Path Interval table."
          INDEX   { ifIndex,
                    sonetPathIntervalNumber }
      ::= { sonetPathIntervalTable 1 }
      SonetPathIntervalEntry ::=
          SEQUENCE {
               sonetPathIntervalNumber     Integer32,
               sonetPathIntervalESs        Gauge32,
               sonetPathIntervalSESs       Gauge32,
               sonetPathIntervalCVs        Gauge32,
               sonetPathIntervalUASs       Gauge32
          }
      sonetPathIntervalNumber OBJECT-TYPE
          SYNTAX  Integer32 (1..96)
          MAX-ACCESS  not-accessible
          STATUS  current
          DESCRIPTION
             "A number between 1 and 96, which identifies the
             interval for which the set of statistics is available.
             The interval identified by 1 is the most recently
             completed 15 minute interval,
             and the interval identified
             by N is the interval immediately preceding the
             one identified
             by N-1."
      ::= { sonetPathIntervalEntry 1 }
      sonetPathIntervalESs OBJECT-TYPE
          SYNTAX  Gauge32
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
           "The counter associated with the number of
           Errored Seconds encountered
           by a SONET/SDH Path in a
           particular 15-minute interval
           in the past 24 hours."
      ::= { sonetPathIntervalEntry 2 }
      sonetPathIntervalSESs OBJECT-TYPE
          SYNTAX  Gauge32
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
           "The counter associated with the number of
           Severely Errored Seconds
           encountered by a SONET/SDH Path in
           a particular 15-minute interval
           in the past 24 hours."
      ::= { sonetPathIntervalEntry 3 }
      sonetPathIntervalCVs OBJECT-TYPE
          SYNTAX  Gauge32
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
           "The counter associated with the number of Coding
           Violations encountered by a
           SONET/SDH Path in a particular 15-minute interval
           in the past 24 hours."
      ::= { sonetPathIntervalEntry 4 }
      sonetPathIntervalUASs OBJECT-TYPE
          SYNTAX  Gauge32
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
           "The counter associated with the number of
           Unavailable Seconds
           encountered by a Path in a
           particular 15-minute interval
           in the past 24 hours."
      ::= { sonetPathIntervalEntry 5 }
      -- The SONET/SDH Far End Path group
      -- This group consists of two tables:
      --  - SONET/SDH Far End Path Current Table
      --  - SONET/SDH Far End Path Interval Table
      -- The SONET/SDH Far End Path Current Table
      -- The SONET/SDH Far End Path Current table
      -- contains various statistics
      -- being collected for the current 15 minute interval.
      -- The statistics are collected from
      -- the far end block error code
      -- (FEBE) within the G1 byte of the Path Overhead.
      -- The definitions are the same as described for
      -- the near-end information.
      sonetFarEndPathCurrentTable OBJECT-TYPE
          SYNTAX  SEQUENCE OF SonetFarEndPathCurrentEntry
          MAX-ACCESS  not-accessible
          STATUS  current
          DESCRIPTION
               "The SONET/SDH Far End Path Current table."
          ::= { sonetFarEndPath 1 }
      sonetFarEndPathCurrentEntry OBJECT-TYPE
          SYNTAX  SonetFarEndPathCurrentEntry
          MAX-ACCESS  not-accessible
          STATUS  current
          DESCRIPTION
               "An entry in the SONET/SDH Far End Path Current table."
          INDEX   { ifIndex }
          ::= { sonetFarEndPathCurrentTable 1 }
      SonetFarEndPathCurrentEntry ::=
          SEQUENCE {
              sonetFarEndPathCurrentESs       Gauge32,
              sonetFarEndPathCurrentSESs      Gauge32,
              sonetFarEndPathCurrentCVs       Gauge32,
              sonetFarEndPathCurrentUASs      Gauge32
          }
      sonetFarEndPathCurrentESs OBJECT-TYPE
          SYNTAX  Gauge32
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
               "The counter associated with the number of Far
               Far End Errored Seconds encountered by a SONET/SDH
               interface in the current 15 minute interval."
          ::= { sonetFarEndPathCurrentEntry 1 }
      sonetFarEndPathCurrentSESs OBJECT-TYPE
          SYNTAX  Gauge32
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
               "The counter associated with the number of
               Far End Severely Errored Seconds
               encountered by a SONET/SDH Path
               interface in the current 15 minute
               interval."
          ::= { sonetFarEndPathCurrentEntry 2 }
      sonetFarEndPathCurrentCVs OBJECT-TYPE
          SYNTAX  Gauge32
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
               "The counter associated with the number of
               Far End Coding Violations reported via
               the far end block error count
               encountered by a
               SONET/SDH Path interface in
               the current 15 minute interval."
          ::= { sonetFarEndPathCurrentEntry 3 }
      sonetFarEndPathCurrentUASs OBJECT-TYPE
         SYNTAX  Gauge32
         MAX-ACCESS  read-only
         STATUS  current
         DESCRIPTION
             "The counter associated with the number of
             Far End Unavailable Seconds
             encountered by a
             SONET/SDH Path interface in
             the current 15 minute interval."
         ::= { sonetFarEndPathCurrentEntry 4 }
      -- The SONET/SDH Far End Path Interval Table
      -- The SONET/SDH Far End Path Interval Table
      -- contains various statistics
      -- collected by each system over a maximum
      -- of the previous 24 hours of
      -- operation.  The past 24 hours may be broken into 96
      -- completed 15 minute intervals.
      -- A system is required to store at
      -- least 4 completed 15 minute interval.
      -- The default value is 32 intervals.
      sonetFarEndPathIntervalTable OBJECT-TYPE
          SYNTAX  SEQUENCE OF SonetFarEndPathIntervalEntry
          MAX-ACCESS  not-accessible
          STATUS  current
          DESCRIPTION
              "The SONET/SDH Far End Path Interval table."
          ::= { sonetFarEndPath 2 }
      sonetFarEndPathIntervalEntry OBJECT-TYPE
          SYNTAX  SonetFarEndPathIntervalEntry
          MAX-ACCESS  not-accessible
          STATUS  current
          DESCRIPTION
             "An entry in the SONET/SDH Far
             End Path Interval table."
          INDEX   { ifIndex,
                    sonetFarEndPathIntervalNumber }
          ::= { sonetFarEndPathIntervalTable 1 }
      SonetFarEndPathIntervalEntry ::=
          SEQUENCE {
               sonetFarEndPathIntervalNumber     Integer32,
               sonetFarEndPathIntervalESs        Gauge32,
               sonetFarEndPathIntervalSESs       Gauge32,
               sonetFarEndPathIntervalCVs        Gauge32,
               sonetFarEndPathIntervalUASs       Gauge32
          }
      sonetFarEndPathIntervalNumber OBJECT-TYPE
         SYNTAX  Integer32 (1..96)
         MAX-ACCESS  not-accessible
         STATUS  current
         DESCRIPTION
              "A number between 1 and 96, which identifies the
              interval for which the set of statistics is available.
              The interval identified by 1 is the most recently
              completed 15 minute interval,
              and the interval identified
              by N is the interval immediately preceding the
              one identified
              by N-1."
         ::= { sonetFarEndPathIntervalEntry 1 }
      sonetFarEndPathIntervalESs OBJECT-TYPE
         SYNTAX  Gauge32
         MAX-ACCESS  read-only
         STATUS  current
         DESCRIPTION
              "The counter associated with the number of
              Far End Errored Seconds encountered
              by a SONET/SDH Path interface in a
              particular 15-minute interval
              in the past 24 hours."
         ::= { sonetFarEndPathIntervalEntry 2 }
      sonetFarEndPathIntervalSESs OBJECT-TYPE
         SYNTAX  Gauge32
         MAX-ACCESS  read-only
         STATUS  current
         DESCRIPTION
              "The counter associated with the number of
              Far End Severely Errored Seconds
              encountered by a SONET/SDH Path interface
              in a particular 15-minute interval
              in the past 24 hours."
         ::= { sonetFarEndPathIntervalEntry 3 }
      sonetFarEndPathIntervalCVs OBJECT-TYPE
          SYNTAX  Gauge32
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
               "The counter associated with the number of
               Far End Coding Violations reported via
               the far end block error count
               encountered by a
               SONET/SDH Path interface
               in a particular 15-minute interval
               in the past 24 hours."
          ::= { sonetFarEndPathIntervalEntry 4 }
      sonetFarEndPathIntervalUASs OBJECT-TYPE
         SYNTAX  Gauge32
         MAX-ACCESS  read-only
         STATUS  current
         DESCRIPTION
             "The counter associated with the number of
             Far End Unavailable Seconds
             encountered by a
             SONET/SDH Path interface in
             a particular 15-minute interval
             in the past 24 hours."
         ::= { sonetFarEndPathIntervalEntry 5 }
      -- the SONET/SDH Virtual Tributary group
      -- this group consists of 2 tables:
      -- - the SONET/SDH VT Current Table
      -- - the SONET/SDH VT Interval Table
      -- For SDH signals, virtual tributaries are
      -- called VCs instead of VTs
      -- A VT1.5 = VC11
      -- A VT2 = VC12
      -- A VT3 = none
      -- A VT6 = VC3
      -- the SONET/SDH VT Current Table
      -- The SONET/SDH VT current table
      -- contains various statistics
      -- being collected for the
      -- current 15 minute interval.
      sonetVTCurrentTable OBJECT-TYPE
          SYNTAX  SEQUENCE OF SonetVTCurrentEntry
          MAX-ACCESS  not-accessible
          STATUS  current
          DESCRIPTION
           "The SONET/SDH VT Current table."
      ::= { sonetVT 1 }
      sonetVTCurrentEntry OBJECT-TYPE
          SYNTAX  SonetVTCurrentEntry
          MAX-ACCESS  not-accessible
          STATUS  current
          DESCRIPTION
           "An entry in the SONET/SDH VT Current table."
          INDEX   { ifIndex }
      ::= { sonetVTCurrentTable 1 }
      SonetVTCurrentEntry ::=
          SEQUENCE {
              sonetVTCurrentWidth      INTEGER,
              sonetVTCurrentStatus     Integer32,
              sonetVTCurrentESs        Gauge32,
              sonetVTCurrentSESs       Gauge32,
              sonetVTCurrentCVs        Gauge32,
              sonetVTCurrentUASs       Gauge32
          }
      sonetVTCurrentWidth OBJECT-TYPE
          SYNTAX  INTEGER {
                  vtWidth15VC11(1),
                  vtWidth2VC12(2),
                  vtWidth3(3),
                  vtWidth6VC2(4),
                  vtWidth6c(5)
               }
          MAX-ACCESS  read-write
          STATUS  current
          DESCRIPTION
          "A value that indicates the type of the SONET
           VT and SDH VC.  Assigned widths are
           VT1.5/VC11, VT2/VC12, VT3, VT6/VC2, and VT6c."
      ::= { sonetVTCurrentEntry 1 }
      sonetVTCurrentStatus OBJECT-TYPE
          SYNTAX  Integer32 (1..30)
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
            "This variable indicates the
            status of the interface.
            The sonetVTCurrentStatus
            is a bit map represented
            as a sum, therefore,
            it can represent multiple defects
            and failures
            simultaneously.
            The sonetVTNoDefect should be
            set if and only if
            no other flag is set.
            The various bit positions are:
               1   sonetVTNoDefect
               2   sonetVTLOP
               4   sonetVTPathAIS
               8   sonetVTPathRDI
              16   sonetVTPathRFI
              32   sonetVTUnequipped
              64   sonetVTSignalLabelMismatch"
      ::= { sonetVTCurrentEntry 2 }
      sonetVTCurrentESs OBJECT-TYPE
          SYNTAX  Gauge32
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
           "The counter associated with the number of Errored
           Seconds encountered by a SONET/SDH
           VT in the current 15 minute interval."
      ::= { sonetVTCurrentEntry 3 }
      sonetVTCurrentSESs OBJECT-TYPE
          SYNTAX  Gauge32
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
           "The counter associated with the number of
           Severely Errored Seconds
           encountered by a SONET/SDH VT in the current 15 minute
           interval."
      ::= { sonetVTCurrentEntry 4 }
      sonetVTCurrentCVs OBJECT-TYPE
          SYNTAX  Gauge32
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
           "The counter associated with the number of Coding
           Violations encountered by a
           SONET/SDH VT in the current 15 minute interval."
      ::= { sonetVTCurrentEntry 5 }
      sonetVTCurrentUASs OBJECT-TYPE
          SYNTAX  Gauge32
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
           "The counter associated with the number of
           Unavailable Seconds
           encountered by a VT in the current
           15 minute, interval."
      ::= { sonetVTCurrentEntry 6 }
      -- the SONET/SDH VT Interval Table
      -- The SONET/SDH VT Interval Table
      -- contains various statistics
      -- collected by each system over a maximum
      -- of the previous 24 hours of
      -- operation.  The past 24 hours may be broken into 96
      -- completed 15 minute intervals.
      -- A system is required to store at
      -- least 4 completed 15 minute interval.
      -- The default value is 32 intervals.
      sonetVTIntervalTable OBJECT-TYPE
          SYNTAX  SEQUENCE OF SonetVTIntervalEntry
          MAX-ACCESS  not-accessible
          STATUS  current
          DESCRIPTION
           "The SONET/SDH VT Interval table."
      ::= { sonetVT 2 }
      sonetVTIntervalEntry OBJECT-TYPE
          SYNTAX  SonetVTIntervalEntry
          MAX-ACCESS  not-accessible
          STATUS  current
          DESCRIPTION
           "An entry in the SONET/SDH VT Interval table."
          INDEX   { ifIndex,
                    sonetVTIntervalNumber }
      ::= { sonetVTIntervalTable 1 }
      SonetVTIntervalEntry ::=
          SEQUENCE {
              sonetVTIntervalNumber     Integer32,
              sonetVTIntervalESs        Gauge32,
              sonetVTIntervalSESs       Gauge32,
              sonetVTIntervalCVs        Gauge32,
              sonetVTIntervalUASs       Gauge32
          }
      sonetVTIntervalNumber OBJECT-TYPE
          SYNTAX  Integer32 (1..96)
          MAX-ACCESS  not-accessible
          STATUS  current
          DESCRIPTION
            "A number between 1 and 96, which identifies the
            interval for which the set of statistics is available.
            The interval identified by 1 is the most recently
            completed 15 minute interval,
            and the interval identified
            by N is the interval immediately preceding the
            one identified
            by N-1."
      ::= { sonetVTIntervalEntry 1 }
      sonetVTIntervalESs OBJECT-TYPE
          SYNTAX  Gauge32
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
           "The counter associated with the number of
           Errored Seconds encountered
           by a SONET/SDH VT in a particular 15-minute interval
           in the past 24 hours."
      ::= { sonetVTIntervalEntry 2 }
      sonetVTIntervalSESs OBJECT-TYPE
          SYNTAX  Gauge32
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
           "The counter associated with the number of
           Severely Errored Seconds
           encountered by a SONET/SDH VT
           in a particular 15-minute interval
           in the past 24 hours."
      ::= { sonetVTIntervalEntry 3 }
      sonetVTIntervalCVs OBJECT-TYPE
          SYNTAX  Gauge32
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
           "The counter associated with the number of Coding
           Violations encountered by a
           SONET/SDH VT in a particular 15-minute interval
           in the past 24 hours."
      ::= { sonetVTIntervalEntry 4 }
      sonetVTIntervalUASs OBJECT-TYPE
          SYNTAX  Gauge32
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
           "The counter associated with the number of
           Unavailable Seconds
           encountered by a VT in a particular 15-minute interval
           in the past 24 hours."
      ::= { sonetVTIntervalEntry 5 }
      -- The SONET/SDH Far End VT group
      -- This group consists of two tables:
      --    SONET/SDH Far End VT Current Table
      --    SONET/SDH Far End VT Interval Table
      -- The SONET/SDH Far End VT Current
      -- The SONET/SDH Far End VT Current table
      -- contains various statistics
      -- being collected for the current 15 minute interval.
      -- The statistics are collected from
      -- the far end block error code
      -- (FEBE) within the G1 byte of the VT Overhead.
      -- The definitions are the same as described for
      -- the near-end information.
      sonetFarEndVTCurrentTable OBJECT-TYPE
          SYNTAX  SEQUENCE OF SonetFarEndVTCurrentEntry
          MAX-ACCESS  not-accessible
          STATUS  current
          DESCRIPTION
              "The SONET/SDH Far End VT Current table."
          ::= { sonetFarEndVT 1 }
      sonetFarEndVTCurrentEntry OBJECT-TYPE
          SYNTAX  SonetFarEndVTCurrentEntry
          MAX-ACCESS  not-accessible
          STATUS  current
          DESCRIPTION
              "An entry in the SONET/SDH Far End VT Current table."
          INDEX   { ifIndex }
          ::= { sonetFarEndVTCurrentTable 1 }
      SonetFarEndVTCurrentEntry ::=
          SEQUENCE {
              sonetFarEndVTCurrentESs       Gauge32,
              sonetFarEndVTCurrentSESs      Gauge32,
              sonetFarEndVTCurrentCVs       Gauge32,
              sonetFarEndVTCurrentUASs      Gauge32
          }
      sonetFarEndVTCurrentESs OBJECT-TYPE
          SYNTAX  Gauge32
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
              "The counter associated with the number of Far
              Far End Errored Seconds encountered by a SONET/SDH
              interface in the current 15 minute interval."
      ::= { sonetFarEndVTCurrentEntry 1 }
      sonetFarEndVTCurrentSESs OBJECT-TYPE
          SYNTAX  Gauge32
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
              "The counter associated with the number of
              Far End Severely Errored Seconds
              encountered by a SONET/SDH VT interface
              in the current 15 minute
              interval."
          ::= { sonetFarEndVTCurrentEntry 2 }
      sonetFarEndVTCurrentCVs OBJECT-TYPE
          SYNTAX  Gauge32
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
              "The counter associated with the number of
              Far End Coding Violations reported via
              the far end block error count
              encountered by a
              SONET/SDH VT interface
              in the current 15 minute interval."
          ::= { sonetFarEndVTCurrentEntry 3 }
      sonetFarEndVTCurrentUASs OBJECT-TYPE
         SYNTAX  Gauge32
         MAX-ACCESS  read-only
         STATUS  current
         DESCRIPTION
            "The counter associated with the number of
            Far End Unavailable Seconds
            encountered by a
            SONET/SDH VT interface
            in the current 15 minute interval."
         ::= { sonetFarEndVTCurrentEntry 4 }
      -- The SONET/SDH Far End VT Interval Table
      -- The SONET/SDH Far End VT Interval Table
      -- contains various statistics
      -- collected by each system over a maximum
      -- of the previous 24 hours of
      -- operation.  The past 24 hours may be broken into 96
      -- completed 15 minute intervals.
      -- A system is required to store at
      -- least 4 completed 15 minute interval.
      -- The default value is 32 intervals.
      sonetFarEndVTIntervalTable OBJECT-TYPE
          SYNTAX  SEQUENCE OF SonetFarEndVTIntervalEntry
          MAX-ACCESS  not-accessible
          STATUS  current
          DESCRIPTION
             "The SONET/SDH Far End VT Interval table."
          ::= { sonetFarEndVT 2 }
      sonetFarEndVTIntervalEntry OBJECT-TYPE
          SYNTAX  SonetFarEndVTIntervalEntry
          MAX-ACCESS  not-accessible
          STATUS  current
          DESCRIPTION
            "An entry in the SONET/SDH Far
            End VT Interval table."
          INDEX   { ifIndex,
                    sonetFarEndVTIntervalNumber }
          ::= { sonetFarEndVTIntervalTable 1 }
      SonetFarEndVTIntervalEntry ::=
         SEQUENCE {
               sonetFarEndVTIntervalNumber     Integer32,
               sonetFarEndVTIntervalESs        Gauge32,
               sonetFarEndVTIntervalSESs       Gauge32,
               sonetFarEndVTIntervalCVs        Gauge32,
               sonetFarEndVTIntervalUASs       Gauge32
          }
      sonetFarEndVTIntervalNumber OBJECT-TYPE
          SYNTAX  Integer32 (1..96)
          MAX-ACCESS  not-accessible
          STATUS  current
          DESCRIPTION
             "A number between 1 and 96, which identifies the
             interval for which the set of statistics is available.
             The interval identified by 1 is the most recently
             completed 15 minute interval,
             and the interval identified
             by N is the interval immediately preceding the
             one identified
             by N-1."
          ::= { sonetFarEndVTIntervalEntry 1 }
      sonetFarEndVTIntervalESs OBJECT-TYPE
          SYNTAX  Gauge32
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
                "The counter associated with the number of
                Far End Errored Seconds encountered
                by a SONET/SDH VT interface
                in a particular 15-minute interval
                in the past 24 hours."
         ::= { sonetFarEndVTIntervalEntry 2 }
      sonetFarEndVTIntervalSESs OBJECT-TYPE
          SYNTAX  Gauge32
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
                "The counter associated with the number of
                Far End Severely Errored Seconds
                encountered by a SONET/SDH VT interface
                in a particular 15-minute interval
                in the past 24 hours."
          ::= { sonetFarEndVTIntervalEntry 3 }
      sonetFarEndVTIntervalCVs OBJECT-TYPE
          SYNTAX  Gauge32
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
               "The counter associated with the number of
               Far End Coding Violations reported via
               the far end block error count
               encountered by a
               SONET/SDH VT interface in a
               particular 15-minute interval
               in the past 24 hours."
          ::= { sonetFarEndVTIntervalEntry 4 }
      sonetFarEndVTIntervalUASs OBJECT-TYPE
         SYNTAX  Gauge32
         MAX-ACCESS  read-only
         STATUS  current
         DESCRIPTION
             "The counter associated with the number of
             Far End Unavailable Seconds
             encountered by a
             SONET/SDH VT interface in a
             particular 15-minute interval
             in the past 24 hours."
         ::= { sonetFarEndVTIntervalEntry 5 }
      -- conformance information
      sonetConformance OBJECT IDENTIFIER ::= { sonetMIB 4 }
      sonetGroups      OBJECT IDENTIFIER ::= { sonetConformance 1 }
      sonetCompliances OBJECT IDENTIFIER ::= { sonetConformance 2 }
      -- compliance statements
      sonetCompliance MODULE-COMPLIANCE
          STATUS  current
          DESCRIPTION
                  "The compliance statement for SONET/SDH
                   interfaces."
          MODULE  -- this module
              MANDATORY-GROUPS { sonetMediumStuff, sonetSectionStuff }
              GROUP       sonetLineStuff
              DESCRIPTION
                  "Implementation of this group is mandatory for all
                   SONET/SDH systems that terminate SONET/SDH Lines,
                   Paths or Virtual Tributaries."
              GROUP       sonetFarEndLineStuff
              DESCRIPTION
                  "Implementation of this group is optional for all
                   SONET/SDH systems that terminate SONET/SDH Lines,
                   Paths or Virtual Tributaries, and that
                   provide for a far end block error (FEBE)
                   information at the SONET/SDH Line Layer."
              GROUP       sonetPathStuff
              DESCRIPTION
                  "Implementation of this group is mandatory for all
                   SONET/SDH systems that terminate SONET/SDH
                   Paths or Virtual
                   Tributaries."
              OBJECT      sonetPathWidth
              MIN-ACCESS  read-only
              DESCRIPTION
                  "Write access is not required."
              GROUP       sonetFarEndPathStuff
              DESCRIPTION
                  "Implementation of this group is optional for all
                   SONET/SDH systems that terminate SONET/SDH
                   Paths or Virtual
                   Tributaries, and that process
                   Far End information."
              GROUP       sonetVTStuff
              DESCRIPTION
                  "Implementation of this group is mandatory for all
                   SONET/SDH systems that terminate SONET/SDH
                   Virtual Tributaries."
              OBJECT      sonetVTWidth
              MIN-ACCESS  read-only
              DESCRIPTION
                  "Write access is not required."
              GROUP       sonetFarEndVTStuff
              DESCRIPTION
                  "Implementation of this group is optional for
                   all SONET/SDH systems that terminate the
                   SONET/SDH floating Virtual Tributaries, and
                   that process Far End information."
          ::= { sonetCompliances 1 }
      -- units of conformance
      sonetMediumStuff    OBJECT-GROUP
          OBJECTS { sonetMediumType,
                    sonetMediumTimeElapsed,
                    sonetMediumValidIntervals,
                    sonetMediumLineCoding,
                    sonetMediumLineType,
                    sonetMediumCircuitIdentifier }
          STATUS  current
          DESCRIPTION
                  "A collection of objects providing configuration
                  information applicable to all SONET/SDH
                  interfaces."
          ::= { sonetGroups 1 }
      sonetSectionStuff    OBJECT-GROUP
          OBJECTS { sonetSectionCurrentStatus,
                    sonetSectionCurrentESs,
                    sonetSectionCurrentSESs,
                    sonetSectionCurrentSEFSs,
                    sonetSectionCurrentCVs,
                    sonetSectionIntervalESs,
                    sonetSectionIntervalSESs,
                    sonetSectionIntervalSEFSs,
                    sonetSectionIntervalCVs
       }
          STATUS  current
          DESCRIPTION
                  "A collection of objects providing information
                  specific to SONET/SDH Section interfaces."
          ::= { sonetGroups 2 }
      sonetLineStuff    OBJECT-GROUP
          OBJECTS { sonetLineCurrentStatus,
                    sonetLineCurrentESs,
                    sonetLineCurrentSESs,
                    sonetLineCurrentCVs,
                    sonetLineCurrentUASs,
                    sonetLineIntervalESs,
                    sonetLineIntervalSESs,
                    sonetLineIntervalCVs,
                    sonetLineIntervalUASs }
          STATUS  current
          DESCRIPTION
                  "A collection of objects providing information
                  specific to SONET/SDH Line interfaces."
          ::= { sonetGroups 3 }
      sonetFarEndLineStuff    OBJECT-GROUP
          OBJECTS { sonetFarEndLineCurrentESs,
                    sonetFarEndLineCurrentSESs,
                    sonetFarEndLineCurrentCVs,
                    sonetFarEndLineCurrentUASs,
                    sonetFarEndLineIntervalESs,
                    sonetFarEndLineIntervalSESs,
                    sonetFarEndLineIntervalCVs,
                    sonetFarEndLineIntervalUASs }
          STATUS  current
          DESCRIPTION
                  "A collection of objects providing information
                  specific to SONET/SDH Line interfaces,
                  and maintaining Line Far End information."
          ::= { sonetGroups 4 }
      sonetPathStuff    OBJECT-GROUP
          OBJECTS { sonetPathCurrentWidth,
                    sonetPathCurrentStatus,
                    sonetPathCurrentESs,
                    sonetPathCurrentSESs,
                    sonetPathCurrentCVs,
                    sonetPathCurrentUASs,
                    sonetPathIntervalESs,
                    sonetPathIntervalSESs,
                    sonetPathIntervalCVs,
                    sonetPathIntervalUASs }
          STATUS  current
          DESCRIPTION
                  "A collection of objects providing information
                  specific to SONET/SDH Path interfaces."
          ::= { sonetGroups 5 }
      sonetFarEndPathStuff    OBJECT-GROUP
          OBJECTS { sonetFarEndPathCurrentESs,
                    sonetFarEndPathCurrentSESs,
                    sonetFarEndPathCurrentCVs,
                    sonetFarEndPathCurrentUASs,
                    sonetFarEndPathIntervalESs,
                    sonetFarEndPathIntervalSESs,
                    sonetFarEndPathIntervalCVs,
                    sonetFarEndPathIntervalUASs }
          STATUS  current
          DESCRIPTION
                  "A collection of objects providing information
                  specific to SONET/SDH Path interfaces,
                  and maintaining Path Far End information."
          ::= { sonetGroups 6 }
      sonetVTStuff    OBJECT-GROUP
          OBJECTS { sonetVTCurrentWidth,
                    sonetVTCurrentStatus,
                    sonetVTCurrentESs,
                    sonetVTCurrentSESs,
                    sonetVTCurrentCVs,
                    sonetVTCurrentUASs,
                    sonetVTIntervalESs,
                    sonetVTIntervalSESs,
                    sonetVTIntervalCVs,
                    sonetVTIntervalUASs }
          STATUS  current
          DESCRIPTION
                  "A collection of objects providing information
                  specific to SONET/SDH VT interfaces."
          ::= { sonetGroups 7 }
      sonetFarEndVTStuff    OBJECT-GROUP
          OBJECTS { sonetFarEndVTCurrentESs,
                    sonetFarEndVTCurrentSESs,
                    sonetFarEndVTCurrentCVs,
                    sonetFarEndVTCurrentUASs,
                    sonetFarEndVTIntervalESs,
                    sonetFarEndVTIntervalSESs,
                    sonetFarEndVTIntervalCVs,
                    sonetFarEndVTIntervalUASs }
          STATUS  current
          DESCRIPTION
                  "A collection of objects providing information
                  specific to SONET/SDH VT interfaces,
                  and maintaining VT Far End information."
          ::= { sonetGroups 8 }
      END

Acknowledgments

This specification is a product of the AToM MIB Working Group.

References

[1] Case, J., McCloghrie, K., Rose, M., and S. Waldbusser, "Structure

   of Management Information for version 2 of the Simple Network
   Management Protocol (SNMPv2)", RFC 1442, SNMP Research, Inc.,
   Hughes LAN Systems, Dover Beach Consulting, Inc., Carnegie Mellon
   University, April 1993.

[2] Case, J., McCloghrie, K., Rose, M., and S. Waldbusser, "Textual

   Conventions for version 2 of the the Simple Network Management
   Protocol (SNMPv2)", RFC 1443, SNMP Research, Inc., Hughes LAN
   Systems, Dover Beach Consulting, Inc., Carnegie Mellon
   University, April 1993.

[3] Case, J., McCloghrie, K., Rose, M., and S. Waldbusser,

   "Conformance Statements for version 2 of the the Simple Network
   Management Protocol (SNMPv2)", RFC 1444, SNMP Research, Inc.,
   Hughes LAN Systems, Dover Beach Consulting, Inc., Carnegie Mellon
   University, April 1993.

[4] Galvin, J., and K. McCloghrie, "Administrative Model for version

   2 of the Simple Network Management Protocol (SNMPv2)", RFC 1445,
   Trusted Information Systems, Hughes LAN Systems, April 1993.

[5] Case, J., McCloghrie, K., Rose, M., and S. Waldbusser, "Protocol

   Operations for version 2 of the Simple Network Management
   Protocol (SNMPv2)", RFC 1448, SNMP Research, Inc., Hughes LAN
   Systems, Dover Beach Consulting, Inc., Carnegie Mellon
   University, April 1993.

[6] McCloghrie, K., and M. Rose, "Management Information Base for

   Network Management of TCP/IP-based internets: MIB-II", STD 17,
   RFC 1213, Hughes LAN Systems, Inc., Performance Systems
   International, March 1991.

[7] Information processing systems - Open Systems Interconnection -

   Specification of Abstract Syntax Notation One (ASN.1),
   International Organization for Standardization.  International
   Standard 8824, (December, 1987).

[8] Information processing systems - Open Systems Interconnection -

   Specification of Basic Encoding Rules for Abstract Notation One
   (ASN.1), International Organization for Standardization.
   International Standard 8825, (December, 1987).

[9] American National Standard for Telecommunications - Digital

   Hierarchy - Optical Interface Rates and Formats Specification,
   ANSI T1.105-1988.
 [9a] ANSI T1.105-1991.
 [10] American National Standard for Telecommunications - Digital
   Hierarchy - Optical Interface Specification (Single-Mode), ANSI
   T1.106-1988.
 [11] American National Standard for Telecommunications -- Layer 1 In-
   Service Digital Transmission Performance Monitoring T1M1.3/93-
   005R2, July 1993.
 [12] McCloghrie, K.,  and F. Kastenholz, "Evolution of Interfaces
   Group of MIB-II", RFC 1573, Hughes LAN Systems, FTP Software,
   January 1994.
 [13] Cox, T., and K. Tesink, Editors, "Definitions of Managed Objects
   for the DS3/E3 Interface Type", RFC 1407, Bellcore, January 1993.
 [14] Baker, F.,  and J. Watt, Editors, "Definitions of Managed Objects
   for the DS1/E1 Interface Type", RFC 1406, Advanced Computer
   Communications, Newbridge Networks Corporation, January 1993.
 [15] CCITT Recommendation G.707, "Synchronous Digital Hierarchy Bit
   Rates", June 1992.
 [16] CCITT Recommendation G.708, "Network Node Interface for the
   Synchronous Digital Hierarchy", June 1992.
 [17] CCITT Recommendation G.709, "Synchronous Multiplexing Structure",
   June 1992.
 [18] CCITT Recommendation G.783, "Characteristics of Synchronous
   Digital Hierarchy (SDH) Multiplexing Equipment Functional
   Blocks", November 1992.

Security Considerations

Security issues are not discussed in this memo.

Authors' Addresses

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

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

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

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