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rfc:rfc3592

Network Working Group K. Tesink Request for Comments: 3592 Telcordia Technologies Obsoletes: 2558 September 2003 Category: Standards Track

              Definitions of Managed Objects for the
          Synchronous Optical Network/Synchronous Digital
                Hierarchy (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.

Copyright Notice

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

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) interfaces.  This
 document is a companion to the documents that define Managed Objects
 for the DS1/E1/DS2/E2 and DS3/E3 Interface Types.
 This memo replaces RFC 2558.  Changes relative to RFC 2558 are
 summarized in the MIB module's REVISION clause.

Table of Contents

 1.  Conventions ..................................................  2
 2.  The Internet-Standard Management Framework ...................  3
 3.  Overview .....................................................  3
     3.1.  Use of the ifTable .....................................  3
     3.2.  Use of ifTable for SONET/SDH
           Medium/Section/Line Layer ..............................  5
     3.3.  Use of ifTable for SONET/SDH Paths .....................  6
     3.4.  Use of ifTable for SONET/SDH VTs/VCs ...................  7
     3.5.  SONET/SDH Terminology ..................................  7
 4.  Object Definitions ........................................... 15
     4.1.  The SONET/SDH Medium Group ............................. 19
     4.2.  The SONET/SDH Section Group ............................ 23

Tesink Standards Track [Page 1] RFC 3592 SONET/SDH Objects September 2003

           4.2.1.  The SONET/SDH Section Current Group ............ 23
           4.2.2.  The SONET/SDH Section Interval Group ........... 25
     4.3.  The SONET/SDH Line Group ............................... 28
           4.3.1.  The SONET/SDH Line Current Group ............... 28
           4.3.2.  The SONET/SDH Line Interval Group .............. 30
     4.4.  The SONET/SDH Far End Line Group ....................... 32
           4.4.1.  The SONET/SDH Far End Line Current Group ....... 32
           4.4.2.  The SONET/SDH Far End Line Interval Group ...... 34
     4.5.  The SONET/SDH Path Group ............................... 37
           4.5.1.  The SONET/SDH Path Current Group ............... 37
           4.5.2.  The SONET/SDH Path Interval Group .............. 39
     4.6.  The SONET/SDH Far End Path Group ....................... 42
           4.6.1.  The SONET/SDH Far End Path Current Group ....... 42
           4.6.2.  The SONET/SDH Far End Path Interval Group ...... 44
     4.7.  The SONET/SDH Virtual Tributary Group .................. 46
           4.7.1.  The SONET/SDH VT Current Group ................. 46
           4.7.2.  The SONET/SDH VT Interval Group ................ 49
     4.8.  The SONET/SDH Far End VT Group ......................... 51
           4.8.1.  The SONET/SDH Far End VT Current Group ......... 51
           4.8.2.  The SONET/SDH Far End VT Interval Group......... 53
     4.9.  Conformance Information ................................ 56
     4.10. Compliance Statements .................................. 56
 5.  Acknowledgments .............................................. 65
 6.  Security Considerations ...................................... 65
 7.  References ................................................... 66
     7.1.  Normative References ................................... 66
     7.2.  Informative References ................................. 68
 8.  Intellectual Property Statement .............................. 68
 Appendix A: The delay-line approach to statistics collection ..... 69
 Appendix B: RFC 1595 SES interpretation .......................... 71
 Author's Address ................................................. 72
 Full Copyright Statement ......................................... 73

1. Conventions

 The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
 "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
 "OPTIONAL", when they appear in this document, are to be interpreted
 as described in BCP 14, RFC 2119 [RFC2119].

Tesink Standards Track [Page 2] RFC 3592 SONET/SDH Objects September 2003

2. The Internet-Standard Management Framework

 For a detailed overview of the documents that describe the current
 Internet-Standard Management Framework, please refer to section 7 of
 RFC 3410 [RFC3410].
 Managed objects are accessed via a virtual information store, termed
 the Management Information Base or MIB.  MIB objects are generally
 accessed through the Simple Network Management Protocol (SNMP).
 Objects in the MIB are defined using the mechanisms defined in the
 Structure of Management Information (SMI).  This memo specifies a MIB
 module that is compliant to the SMIv2, which is described in STD 58,
 RFC 2578 [RFC2578], STD 58, RFC 2579 [RFC2579] and STD 58, RFC 2580
 [RFC2580].
 Textual conventions used in this document are defined in RFC 2579
 [RFC2579] and RFC 3593 [RFC3593].

3. 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
 [T1.105a][T1.105b][T1.106] and CCITT G.707, 708, 709, and G.783
 [G.707][G.708][G.709][G.783].

3.1. Use of the ifTable

 This section specifies how the MIB II interfaces group, as defined in
 [RFC2863], 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.

Tesink Standards Track [Page 3] RFC 3592 SONET/SDH Objects September 2003

 Not all SONET/SDH equipment terminates all SONET/SDH layers. For
 example, a 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 [RFC1213], as extended by [RFC2863], 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
 [RFC2863], as follows:
  _____________________________
 |             |          |    |  >
 |             |          |    |  |
 |    VT 1     |..........|VT K|   > K ifEntries
 |             |          |    |  |
 |_____________|__________|____|  >
 |               |      |      |  >
 |               |      |      |  |
 |    Path 1     |......|Path L|   > L ifEntries
 |               |      |      |  |
 |_______________|______|______|  >
 |                             |  >
 |                             |  |
 |    Line                     |  |
 |                             |  |
 |_____________________________|  |
 |                             |  |
 |                             |  |
 |    Section Layer            |   > 1 ifEntry
 |                             |  |
 |_____________________________|  |
 |                             |  |
 |                             |  |
 |    Physical Medium Layer    |  |
 |                             |  |
 |_____________________________|  >
 Use of ifTable for a SONET/SDH port
 The exact configuration and multiplexing of the layers is maintained
 in the ifStackTable [RFC2863] and in the ifInvStackTable [RFC2864].

Tesink Standards Track [Page 4] RFC 3592 SONET/SDH Objects September 2003

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

 Only the ifGeneralInformationGroup needs to be supported.
 ifTable Object    Use for combined SONET/SDH
                   Medium/Section/Line Layer
 =====================================================================
  ifIndex           Interface index.
  ifDescr           SONET/SDH Medium/Section/Line
  ifType            sonet(39)
  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     May be implemented with 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   Default value is enabled(1).
                           May be implemented with read-only access.
  ifHighSpeed       Speed of line in Mega-bits per second
                    (e.g., 155 Mbps)
  ifConnectorPresent Set to true(1).
  ifAlias            The (non-volatile) alias name for this interface
                     as assigned by the network manager.

Tesink Standards Track [Page 5] RFC 3592 SONET/SDH Objects September 2003

3.3. Use of ifTable for SONET/SDH Paths

 Only the ifGeneralInformationGroup needs to be supported.
 ifTable Object    Use for SONET/SDH Paths
 =========================================
  ifIndex           Interface index.
  ifDescr           SONET/SDH Path
  ifType            sonetPath(50)
  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     May be implemented with 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).
                           May be implemented with read-only access.
  ifHighSpeed       Set to rate of SONET/SDH path
                    in Mega-bits per second.
  ifConnectorPresent Set to false(2).
  ifAlias            The (non-volatile) alias name for this interface
                     as assigned by the network manager.

Tesink Standards Track [Page 6] RFC 3592 SONET/SDH Objects September 2003

3.4. Use of ifTable for SONET/SDH VTs/VCs

 Only the ifGeneralInformationGroup needs to be supported.
 ifTable Object    Use for SONET/SDH VTs/VCs
 ===========================================
  ifIndex           Interface index.
  ifDescr           SONET/SDH VT/VC
  ifType            sonetVT(51)
  ifSpeed           Set to speed of VT/VC
                    (e.g., a VT1.5 has a rate of
                    1728000 bps.)
  ifPhysAddress     Circuit Identifier or OCTET STRING of zero length.
  ifAdminStatus     May be implemented with 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).
                           May be implemented with read-only access.
  ifHighSpeed       Set to rate of VT in Mega-bits per second.
  ifConnectorPresent Set to false(2).
  ifAlias            The (non-volatile) alias name for this interface
                     as assigned by the network manager.

3.5. SONET/SDH Terminology

 The terminology used in this document to describe error conditions on
 a SONET circuit as monitored by a SONET system are from the T1.231
 [T1M1.3][T1.231a][T1.231b].  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 [G.783].  Only the SONET Performance

Tesink Standards Track [Page 7] RFC 3592 SONET/SDH Objects September 2003

 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 [G.783].  If the definition in this document
 does not match the definition in the T1.231 document, the implementer
 should follow the definition described in this document.  In some
 cases other or additional references are used as compared with the
 ones cited above.  This will be indicated in the text.
 Section Loss Of Frame Failure (Out of Frame Event, Severely
    Errored Frame Defect) An Out of Frame (OOF) event (or Severely
    Errored Frame defect) is the occurrence of four contiguous errored
    frame alignment words.  A frame alignment word 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.
    A 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.
    A 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.

Tesink Standards Track [Page 8] RFC 3592 SONET/SDH Objects September 2003

 STS-Path Loss of Pointer
    A 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.
    An 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:
  1. Line AIS defect is detected as a "111" pattern in bits 6, 7,

and 8 of the K2 byte in five consecutive frames.

  1. 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 2.5 +/- 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:

Tesink Standards Track [Page 9] RFC 3592 SONET/SDH Objects September 2003

  1. STS-Path AIS defect is detected as all ones in bytes H1 and H2

in three contiguous frames.

  1. 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.
    An STS-Path AIS failure is declared when the STS-Path AIS defect
    persists for 2.5 +/- 0.5 seconds.  An 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:
  1. VT-Path AIS defect is detected by a VT PTE as all ones in bytes

V1 and V2 in three contiguous VT superframes.

  1. 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:
  1. Line RDI defect is a "110" code in bits 6, 7, and 8 of the K2

byte of in STS-1 #1 in x consecutive frames, where x = 5

       [T1.231a][T1.231b] or 10 [T1.231b].

Tesink Standards Track [Page 10] RFC 3592 SONET/SDH Objects September 2003

  1. Line RDI defect is terminated when any code other than "110" is

detected in bits 6, 7, and 8 of the K2 byte in x consecutive

       frames, where x = 5 [T1.231a][T1.231b] or 10 [T1.231b].
    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:
  1. 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 x consecutive frames, where x = 5
       [T1.231a] or 10 [T1.231b].
  1. Removal of STS-Path Remote Defect Indication is detected by a

"0" in bit 5 of the G1 byte in x consecutive frames, where x =

       5 [T1.231a] or 10 [T1.231b].
    An 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:
  1. VT-Path RDI defect is the occurrence of a "1" in bit 4 of the

VT-Path Overhead byte (V5) in x consecutive frames, where x = 5

       [T1.231a] or 10 [T1.231b].

Tesink Standards Track [Page 11] RFC 3592 SONET/SDH Objects September 2003

  1. VT-Path RDI defect is terminated when a "0" is detected in bit

4 of the VT-Path Overhead byte (V5) for x consecutive frames,

       where x = 5 [T1.231a] or 10 [T1.231b].
    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
    According to [T1M1.3][T1.231a][TR253][GR253][T1.231b] at each
    layer, an Severely Errored Second (SES) is a second with x or more
    CVs at that layer, or a second during which at least one or more
    incoming defects at that layer has occurred.  The values of x in

Tesink Standards Track [Page 12] RFC 3592 SONET/SDH Objects September 2003

    RFC 1595 [RFC1595] were based on [T1M1.3] and [TR253] (see
    Appendix B).  These values have subsequently been relaxed in
    [T1.231a][GR253][T1.231b].  In addition, according to G.826
    [G.826] SESs are measured as a percentage of errored blocks.
    To deal with these sets of definitions this memo defines an object
    sonetSESthresholdSet that determines the correct interpretation of
    SES.  For backward compatibility, if this object is not
    implemented the interpretation of Appendix B shall apply.
    Otherwise, a more recent interpretation is suggested.  An agent is
    not required to support all sets of definitions.
    Note that CV counts should be frozen during SESs.
    Note that if a manager changes the value of this object all SES
    statistics collected prior to this change shall be invalidated.
 Severely Errored Framing Seconds
    A Severely Errored Framing Second (SEFS) is a second 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.
    Note that this definition implies that the agent cannot determine
    until after a ten second interval has passed whether a given one-
    second interval belongs to available or unavailable time.  If the
    agent chooses to update the various performance statistics in real
    time then it must be prepared to retroactively reduce the ES, SES,
    and SEFS counts by 10 and increase the UAS count by 10 when it
    determines that available time has been entered.  It must also be
    prepared to reduce the CV count by the number of violations
    counted since the onset of unavailable time.  The agent must be
    similarly prepared to retroactively decrease the UAS count by 10
    and increase the ES and CV counts as necessary upon entering
    available time.  A special case exists when the 10 second period

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    leading to available or unavailable time crosses a 900 second
    statistics window boundary, as the foregoing description implies
    that the CV, ES, SES, SEFS, and UAS counts the PREVIOUS interval
    must be adjusted.  In this case successive GETs of the affected
    sonetPathIntervalSES and sonetPathIntervalUAS objects (and the
    analogous Line and VT objects also) objects will return differing
    values if the first GET occurs during the first few seconds of the
    window.
    According to ANSI T1.231 unavailable time begins at the _onset_ of
    10 contiguous severely errored seconds -- that is, unavailable
    time starts with the _first_ of the 10 contiguous SESs.  Also,
    while an interface is deemed unavailable all counters for that
    interface are frozen except for the UAS count.  It follows that an
    implementation which strictly complies with this standard must
    _not_ increment any counters other than the UAS count -- even
    temporarily -- as a result of anything that happens during those
    10 seconds.  Since changes in the signal state lag the data to
    which they apply by 10 seconds, an ANSI-compliant implementation
    must pass the one-second statistics through a 10-second delay line
    prior to updating any counters.  That can be done by performing
    the following steps at the end of each one second interval.
    i)   Read near/far end CV counter and alarm status flags from the
         hardware.
    ii)  Accumulate the CV counts for the preceding second and compare
         them to the ES and SES threshold for the layer in question.
         Update the signal state and shift the one-second CV counts
         and ES/SES flags into the 10-element delay line.  Note that
         far-end one-second statistics are to be flagged as "absent"
         during any second in which there is an incoming defect at the
         layer in question or at any lower layer.
    iii) Update the current interval statistics using the signal state
         from the _previous_ update cycle and the one-second CV counts
         and ES/SES flags shifted out of the 10-element delay line.
    This approach is further described in Appendix A.  An agent may
    choose to use this approach in lieu of retroactive adjustments to
    the counters.
    In any case, a linkDown trap shall be sent only after the agent
    has determined for certain that the unavailable state has been
    entered, but the time on the trap will be that of the first UAS
    (i.e., 10 seconds earlier).  A linkUp trap shall be handled
    similarly.

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 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.  While a Path is unequipped or
    has mismatched signal labels ES/SES counts continue, but these
    conditions do not themselves contribute to ES/SES.
 Circuit Identifier
    This is a character string specified by the circuit vendor, and is
    useful when communicating with the vendor during the
    troubleshooting process.

4. Object Definitions

 SONET-MIB DEFINITIONS ::= BEGIN
 IMPORTS
     MODULE-IDENTITY, OBJECT-TYPE,
     Integer32, transmission
           FROM SNMPv2-SMI
     DisplayString, TruthValue
           FROM SNMPv2-TC
     MODULE-COMPLIANCE, OBJECT-GROUP
           FROM SNMPv2-CONF
     ifIndex
           FROM IF-MIB
     PerfCurrentCount, PerfIntervalCount
           FROM PerfHist-TC-MIB;
  1. - This is the MIB module for the SONET/SDH Interface objects.
 sonetMIB MODULE-IDENTITY
     LAST-UPDATED "200308110000Z"
     ORGANIZATION "IETF AToM MIB Working Group"

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     CONTACT-INFO
       "WG charter:
          http://www.ietf.org/html.charters/atommib-charter.html
        Mailing Lists:
          General Discussion: atommib@research.telcordia.com
          To Subscribe: atommib-request@research.telcordia.com
        Kaj Tesink
        Telcordia Technologies
        Tel: (732) 758-5254
        Fax: (732) 758-2269
        E-mail: kaj@research.telcordia.com."
     DESCRIPTION
       "The MIB module to describe SONET/SDH interface objects.
        Copyright (C) The Internet Society (2003).  This version
        of this MIB module is part of RFC 3592;  see the RFC
        itself for full legal notices."
     REVISION      "200308110000Z"
     DESCRIPTION
         "The key changes made to this MIB module
         since its publication in RFC 2558
         are as follows.
         (1) Corrected typographical error
             (bellcore1991(2) in sonetSESthresholdSet)
         (2) Added support for sts192cSTM64(6) and
             sts768cSTM256(7) in sonetPathCurrentWidth
         (3) Corrected description of the applicability
             of VTs for SDH for improved accuracy
         (4) Added clarification in the SES description that
             CV counts should be frozen during SESs
         (5) Corrected typographical errors:
             - Line Alarm Indication Signal description of the
               Terminology section (20.5 --> 2.5 seconds)
             - In the Terminology section
               sonetSESThresholdSet  --> sonetSESthresholdSet
             "
     REVISION      "199810190000Z"
     DESCRIPTION
         "The RFC 2558 version of this MIB module.

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         The key changes made to this MIB module
         since its initial publication in RFC 1595
         are as follows.
         (1) The MODULE-IDENTITY has been updated to reflect the
             changes to the MIB.
         (2) Where applicable, the textual conventions
             PerfCurrentCount and PerfIntervalCount from
             PerfHist-TC-MIB have been used in place of Gauge32.
         (3) An agent now has the option to delay updates to
             the various performance counts in lieu of performing
             retroactive adjustments upon entering into or exiting
             from unavailable time. This implementation option is
             described in Appendix A of this memo.
         (4) In order to make the SONET-MIB more useful for
             circuit provisioning, the formerly read-only objects
             sonetMediumType, sonetMediumLineCoding,
             sonetMediumLineType, and sonetMediumCircuitIdentifier
             have been given a MAX-ACCESS of read-write. The
             MIN-ACCESS remains read-only.
         (5) The DESCRIPTION clause for sonetMediumTimeElapsed has
             been updated to describe its behaviour if the duration
             of the current interval exceeds the maximum value.
         (6) The DESCRIPTION clause for sonetMediumValidIntervals
             has been updated to describe its behaviour when some
             intervals may be unavailable, and the object
             sonetMediumInvalidIntervals has been added to keep
             count of the number of missing intervals (if any).
         (7) The object sonetMediumLoopbackConfig has been added
             to enable or disable loopback configurations.
         (8) Because the error count thresholds for declaring
             severely errored seconds that are specified in ANSI
             T1.231-1993, ITU-T G.826-1995, and ANSI T1.231-1997
             are all different from each other and from the thresholds
             specified in RFC 1595, an enumerated INTEGER object
             sonetSESthresholdSet has been added to allow an agent
             to specify which threshold set is in use. Text has
             been added to Section 3 stating that if this object is
             not implemented the thresholds specified in RFC 1595
             should be assumed, and the table containing those
             thresholds has been moved to Appendix B of this memo.

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         (9) A column with SYNTAX TruthValue has been added to each
             interval table.  The purpose of the additional column
             is to indicate, for each interval, whether the data
             is valid in the sense intended by ANSI T1.231 clause
             9.1.2.2 [T1.231a][T1.231b]. The objects in question are:
                 sonetSectionIntervalValidData
                 sonetLineIntervalValidData
                 sonetFarEndLineIntervalValidData
                 sonetPathIntervalValidData
                 sonetFarEndPathIntervalValidData
                 sonetVTIntervalValidData
                 sonetFarEndVTIntervalValidData
        (10) The ranges for sonetPathCurrentStatus and
             sonetVTCurrentStatus have been made consistent
             with the DESCRIPTION clauses.
        (11) The conformance information has been updated. Previous
             conformance information from RFC 1595 has been
             deprecated. Some typographical errors in the deprecated
             section have been corrected in order to prevent
             MIB compilation errors."
     REVISION      "199401030000Z"
     DESCRIPTION
         "The RFC 1595 version of this MIB module."
     ::= { transmission 39 }
  1. - 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 }
  1. - 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 }

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 sonetPath          OBJECT IDENTIFIER ::= { sonetObjectsPath 1 }
 sonetFarEndPath    OBJECT IDENTIFIER ::= { sonetObjectsPath 2 }
 sonetVT            OBJECT IDENTIFIER ::= { sonetObjectsVT 1 }
 sonetFarEndVT      OBJECT IDENTIFIER ::= { sonetObjectsVT 2 }
  1. - the SONET/SDH Medium group
  1. - SONET/SDH interfaces for some applications may be electrical
  2. - interfaces and not optical interfaces. This group handles
  3. - the configuration information for both optical SONET/SDH
  4. - interfaces and electrical SONET/SDH interfaces.
 sonetMediumTable OBJECT-TYPE
     SYNTAX  SEQUENCE OF SonetMediumEntry
     MAX-ACCESS  not-accessible
     STATUS  current
     DESCRIPTION
        "The SONET/SDH Medium table."
      ::= { sonetMedium 1 }
 sonetMediumEntry OBJECT-TYPE
     SYNTAX  SonetMediumEntry
     MAX-ACCESS  not-accessible
     STATUS  current
     DESCRIPTION
        "An entry in the SONET/SDH Medium table."
     INDEX   { ifIndex }
      ::= { sonetMediumTable 1 }
 SonetMediumEntry ::=
     SEQUENCE {
          sonetMediumType               INTEGER,
          sonetMediumTimeElapsed        Integer32,
          sonetMediumValidIntervals     Integer32,
          sonetMediumLineCoding         INTEGER,
          sonetMediumLineType           INTEGER,
          sonetMediumCircuitIdentifier  DisplayString,
          sonetMediumInvalidIntervals   Integer32,
          sonetMediumLoopbackConfig     BITS
     }
 sonetMediumType OBJECT-TYPE
     SYNTAX  INTEGER  {
                sonet(1),
                sdh(2)

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             }
     MAX-ACCESS  read-write
     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
        measurement period. If, for some reason, such as an
        adjustment in the system's time-of-day clock, the
        current interval exceeds the maximum value, the
        agent will return the maximum value."
     ::= { sonetMediumEntry 2 }
 sonetMediumValidIntervals OBJECT-TYPE
     SYNTAX  Integer32 (0..96)
     MAX-ACCESS  read-only
     STATUS  current
     DESCRIPTION
        "The number of previous 15-minute intervals
        for which data was collected.
        A SONET/SDH interface must be capable
        of supporting at least n intervals.
        The minimum value of n is 4.
        The default of n is 32.
        The maximum value of n is 96.
        The value will be <n> unless the measurement was
        (re-)started within the last (<n>*15) minutes, in which
        case the value will be the number of complete 15
        minute intervals for which the agent has at least
        some data. In certain cases (e.g., in the case
        where the agent is a proxy) it is possible that some
        intervals are unavailable.  In this case, this
        interval is the maximum interval number for
        which data is available. "
     ::= { sonetMediumEntry 3 }
 sonetMediumLineCoding OBJECT-TYPE
     SYNTAX  INTEGER {
                 sonetMediumOther(1),
                 sonetMediumB3ZS(2),

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                 sonetMediumCMI(3),
                 sonetMediumNRZ(4),
                 sonetMediumRZ(5)
             }
     MAX-ACCESS  read-write
     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-write
     STATUS  current
     DESCRIPTION
        "This variable describes the line type for
        this interface. The line types are
        Short and Long Range
        Single Mode fiber or Multi-Mode fiber interfaces,
        and coax and UTP for electrical interfaces.  The
        value sonetOther should be used when the Line Type is
        not one of the listed values."
     ::= { sonetMediumEntry 5 }
 sonetMediumCircuitIdentifier OBJECT-TYPE
     SYNTAX  DisplayString (SIZE (0..255))
     MAX-ACCESS  read-write
     STATUS  current
     DESCRIPTION
        "This variable contains the transmission
        vendor's circuit identifier, for the
        purpose of facilitating troubleshooting.
        Note that the circuit identifier, if available,
        is also represented by ifPhysAddress."
     ::= { sonetMediumEntry 6 }

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 sonetMediumInvalidIntervals OBJECT-TYPE
     SYNTAX  Integer32 (0..96)
     MAX-ACCESS  read-only
     STATUS  current
     DESCRIPTION
         "The number of intervals in the range from
         0 to sonetMediumValidIntervals for which no
         data is available. This object will typically
         be zero except in cases where the data for some
         intervals are not available (e.g., in proxy
         situations)."
     ::= { sonetMediumEntry 7 }
 sonetMediumLoopbackConfig OBJECT-TYPE
     SYNTAX      BITS {
                   sonetNoLoop(0),
                   sonetFacilityLoop(1),
                   sonetTerminalLoop(2),
                   sonetOtherLoop(3) }
     MAX-ACCESS  read-write
     STATUS      current
     DESCRIPTION
        "The current loopback state of the SONET/SDH interface.  The
         values mean:
           sonetNoLoop
              Not in the loopback state. A device that is not
              capable of performing a loopback on this interface
              shall always return this value.
           sonetFacilityLoop
              The received signal at this interface is looped back
              out through the corresponding transmitter in the return
              direction.
           sonetTerminalLoop
              The signal that is about to be transmitted is connected
              to the associated incoming receiver.
           sonetOtherLoop
              Loopbacks that are not defined here."
     ::= { sonetMediumEntry 8 }
 sonetSESthresholdSet    OBJECT-TYPE
     SYNTAX   INTEGER {
                other(1),
                bellcore1991(2),

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                ansi1993(3),
                itu1995(4),
                ansi1997(5)
                       }
     MAX-ACCESS      read-write
     STATUS          current
     DESCRIPTION
       "An enumerated integer indicating which
        recognized set of SES thresholds that
        the agent uses for determining severely
        errored seconds and unavailable time.
        other(1)
          None of the following.
        bellcore1991(2)
          Bellcore TR-NWT-000253, 1991 [TR253], or
          ANSI T1M1.3/93-005R2, 1993 [T1M1.3].
          See also Appendix B.
        ansi1993(3)
          ANSI T1.231, 1993 [T1.231a], or
          Bellcore GR-253-CORE, Issue 2, 1995 [GR253]
        itu1995(4)
          ITU Recommendation G.826, 1995 [G.826]
        ansi1997(5)
          ANSI T1.231, 1997 [T1.231b]
        If a manager changes the value of this
        object then the SES statistics collected
        prior to this change must be invalidated."
      ::= { sonetMedium 2 }
  1. - the SONET/SDH Section group
  1. - this group consists of 2 tables:
  2. - - the SONET/SDH Section Current Table
  3. - - the SONET/SDH Section Interval Table
  1. - the SONET/SDH Section Current Table
  1. - The SONET/SDH Section
  2. - current table contains various statistics
  3. - being collected for the current 15 minute interval.

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 sonetSectionCurrentTable OBJECT-TYPE
     SYNTAX  SEQUENCE OF SonetSectionCurrentEntry
     MAX-ACCESS  not-accessible
     STATUS  current
     DESCRIPTION
        "The SONET/SDH Section Current table."
      ::= { sonetSection 1 }
 sonetSectionCurrentEntry OBJECT-TYPE
     SYNTAX  SonetSectionCurrentEntry
     MAX-ACCESS  not-accessible
     STATUS  current
     DESCRIPTION
        "An entry in the SONET/SDH Section Current table."
     INDEX   { ifIndex }
      ::= { sonetSectionCurrentTable 1 }
 SonetSectionCurrentEntry ::=
     SEQUENCE {
         sonetSectionCurrentStatus   Integer32,
         sonetSectionCurrentESs      PerfCurrentCount,
         sonetSectionCurrentSESs     PerfCurrentCount,
         sonetSectionCurrentSEFSs    PerfCurrentCount,
         sonetSectionCurrentCVs      PerfCurrentCount
     }
 sonetSectionCurrentStatus OBJECT-TYPE
     SYNTAX  Integer32 (1..6)
     MAX-ACCESS  read-only
     STATUS  current
     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 }

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 sonetSectionCurrentESs OBJECT-TYPE
     SYNTAX  PerfCurrentCount
     MAX-ACCESS  read-only
     STATUS  current
     DESCRIPTION
        "The counter associated with the number of Errored
        Seconds encountered by a SONET/SDH
        Section in the current 15 minute interval."
      ::= { sonetSectionCurrentEntry 2 }
 sonetSectionCurrentSESs OBJECT-TYPE
     SYNTAX  PerfCurrentCount
     MAX-ACCESS  read-only
     STATUS  current
     DESCRIPTION
        "The counter associated with the number of
        Severely Errored Seconds
        encountered by a SONET/SDH Section in the current 15
        minute interval."
      ::= { sonetSectionCurrentEntry 3 }
 sonetSectionCurrentSEFSs OBJECT-TYPE
     SYNTAX  PerfCurrentCount
     MAX-ACCESS  read-only
     STATUS  current
     DESCRIPTION
        "The counter associated with the number of
        Severely Errored Framing Seconds
        encountered by a SONET/SDH Section in the current
        15 minute interval."
     ::= { sonetSectionCurrentEntry 4 }
 sonetSectionCurrentCVs OBJECT-TYPE
     SYNTAX  PerfCurrentCount
     MAX-ACCESS  read-only
     STATUS  current
     DESCRIPTION
        "The counter associated with the number of Coding
        Violations encountered by a
        SONET/SDH Section in the current 15 minute interval."
      ::= { sonetSectionCurrentEntry 5 }
  1. - the SONET/SDH Section Interval Table
  1. - The SONET/SDH Section Interval Table
  2. - contains various statistics
  3. - collected by each system over a maximum
  4. - of the previous 24 hours of

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  1. - operation. The past 24 hours may be broken into 96
  2. - completed 15 minute intervals.
  3. - A system is required to store at
  4. - least 4 completed 15 minute interval.
  5. - The default value is 32 intervals.
 sonetSectionIntervalTable OBJECT-TYPE
     SYNTAX  SEQUENCE OF SonetSectionIntervalEntry
     MAX-ACCESS  not-accessible
     STATUS  current
     DESCRIPTION
        "The SONET/SDH Section Interval table."
      ::= { sonetSection 2 }
 sonetSectionIntervalEntry OBJECT-TYPE
     SYNTAX  SonetSectionIntervalEntry
     MAX-ACCESS  not-accessible
     STATUS  current
     DESCRIPTION
        "An entry in the SONET/SDH Section Interval table."
     INDEX   { ifIndex,
               sonetSectionIntervalNumber }
      ::= { sonetSectionIntervalTable 1 }
 SonetSectionIntervalEntry ::=
     SEQUENCE {
          sonetSectionIntervalNumber  Integer32,
          sonetSectionIntervalESs     PerfIntervalCount,
          sonetSectionIntervalSESs    PerfIntervalCount,
          sonetSectionIntervalSEFSs   PerfIntervalCount,
          sonetSectionIntervalCVs     PerfIntervalCount,
          sonetSectionIntervalValidData  TruthValue
     }
 sonetSectionIntervalNumber OBJECT-TYPE
     SYNTAX  Integer32 (1..96)
     MAX-ACCESS  not-accessible
     STATUS  current
     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 }

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 sonetSectionIntervalESs OBJECT-TYPE
     SYNTAX  PerfIntervalCount
     MAX-ACCESS  read-only
     STATUS  current
     DESCRIPTION
        "The counter associated with the number of
        Errored Seconds encountered
        by a SONET/SDH Section in a
        particular 15-minute interval
        in the past 24 hours."
      ::= { sonetSectionIntervalEntry 2 }
 sonetSectionIntervalSESs OBJECT-TYPE
     SYNTAX  PerfIntervalCount
     MAX-ACCESS  read-only
     STATUS  current
     DESCRIPTION
        "The counter associated with the number of
        Severely Errored Seconds
        encountered by a SONET/SDH Section in a
        particular 15-minute interval
        in the past 24 hours."
     ::= { sonetSectionIntervalEntry 3 }
 sonetSectionIntervalSEFSs OBJECT-TYPE
     SYNTAX  PerfIntervalCount
     MAX-ACCESS  read-only
     STATUS  current
     DESCRIPTION
        "The counter associated with the number of
        Severely Errored Framing Seconds
        encountered by a SONET/SDH Section in a
        particular 15-minute interval
        in the past 24 hours."
     ::= { sonetSectionIntervalEntry 4 }
 sonetSectionIntervalCVs OBJECT-TYPE
     SYNTAX  PerfIntervalCount
     MAX-ACCESS  read-only
     STATUS  current
     DESCRIPTION
        "The counter associated with the number of Coding
        Violations encountered by a
        SONET/SDH Section in a particular 15-minute interval
        in the past 24 hours."
     ::= { sonetSectionIntervalEntry 5 }

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 sonetSectionIntervalValidData OBJECT-TYPE
     SYNTAX  TruthValue
     MAX-ACCESS  read-only
     STATUS  current
     DESCRIPTION
        "This variable indicates if the data for this
         interval is valid."
     ::= { sonetSectionIntervalEntry 6 }
  1. - the SONET/SDH Line group
  1. - this group consists of 2 tables:
  2. - - the SONET/SDH Line Current Table
  3. - - the SONET/SDH Line Interval Table
  1. - the SONET/SDH Line Current Table
  1. - The SONET/SDH Line
  2. - current table contains various statistics
  3. - being collected for the current 15 minute interval.
 sonetLineCurrentTable OBJECT-TYPE
     SYNTAX  SEQUENCE OF SonetLineCurrentEntry
     MAX-ACCESS  not-accessible
     STATUS  current
     DESCRIPTION
       "The SONET/SDH Line Current table."
     ::= { sonetLine 1 }
 sonetLineCurrentEntry OBJECT-TYPE
     SYNTAX  SonetLineCurrentEntry
     MAX-ACCESS  not-accessible
     STATUS  current
     DESCRIPTION
       "An entry in the SONET/SDH Line Current table."
     INDEX   { ifIndex }
     ::= { sonetLineCurrentTable 1 }
 SonetLineCurrentEntry ::=
     SEQUENCE {
          sonetLineCurrentStatus    Integer32,
          sonetLineCurrentESs       PerfCurrentCount,
          sonetLineCurrentSESs      PerfCurrentCount,
          sonetLineCurrentCVs       PerfCurrentCount,
          sonetLineCurrentUASs      PerfCurrentCount
      }

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 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  PerfCurrentCount
     MAX-ACCESS  read-only
     STATUS  current
     DESCRIPTION
      "The counter associated with the number of Errored
      Seconds encountered by a SONET/SDH
      Line in the current 15 minute interval."
     ::= { sonetLineCurrentEntry 2 }
 sonetLineCurrentSESs OBJECT-TYPE
     SYNTAX  PerfCurrentCount
     MAX-ACCESS  read-only
     STATUS  current
     DESCRIPTION
      "The counter associated with the number of
      Severely Errored Seconds
      encountered by a SONET/SDH Line in the current 15
      minute
      interval."
     ::= { sonetLineCurrentEntry 3 }
 sonetLineCurrentCVs OBJECT-TYPE
     SYNTAX  PerfCurrentCount
     MAX-ACCESS  read-only
     STATUS  current

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     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  PerfCurrentCount
     MAX-ACCESS  read-only
     STATUS  current
     DESCRIPTION
      "The counter associated with the number of
      Unavailable Seconds
      encountered by a SONET/SDH Line in the current 15
      minute
      interval."
     ::= { sonetLineCurrentEntry 5 }
  1. - the SONET/SDH Line Interval Table
  1. - The SONET/SDH Line Interval Table
  2. - contains various statistics
  3. - collected by each system over a maximum
  4. - of the previous 24 hours of
  5. - operation. The past 24 hours may be broken into 96
  6. - completed 15 minute intervals.
  7. - A system is required to store at
  8. - least 4 completed 15 minute interval.
  9. - 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 }

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 SonetLineIntervalEntry ::=
     SEQUENCE {
         sonetLineIntervalNumber    Integer32,
         sonetLineIntervalESs       PerfIntervalCount,
         sonetLineIntervalSESs      PerfIntervalCount,
         sonetLineIntervalCVs       PerfIntervalCount,
         sonetLineIntervalUASs      PerfIntervalCount,
         sonetLineIntervalValidData TruthValue
     }
 sonetLineIntervalNumber OBJECT-TYPE
     SYNTAX  Integer32 (1..96)
     MAX-ACCESS  not-accessible
     STATUS  current
     DESCRIPTION
         "A number between 1 and 96, which identifies the
         interval for which the set of statistics is available.
         The interval identified by 1 is the most recently
         completed 15 minute interval,
         and the interval identified
         by N is the interval immediately preceding the
         one identified
         by N-1."
      ::= { sonetLineIntervalEntry 1 }
 sonetLineIntervalESs OBJECT-TYPE
     SYNTAX  PerfIntervalCount
     MAX-ACCESS  read-only
     STATUS  current
     DESCRIPTION
        "The counter associated with the number of
        Errored Seconds encountered
        by a SONET/SDH Line in a
        particular 15-minute interval
        in the past 24 hours."
      ::= { sonetLineIntervalEntry 2 }
 sonetLineIntervalSESs OBJECT-TYPE
     SYNTAX  PerfIntervalCount
     MAX-ACCESS  read-only
     STATUS  current
     DESCRIPTION
        "The counter associated with the number of
        Severely Errored Seconds
        encountered by a SONET/SDH Line in a
        particular 15-minute interval
        in the past 24 hours."
       ::= { sonetLineIntervalEntry 3 }

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 sonetLineIntervalCVs OBJECT-TYPE
     SYNTAX  PerfIntervalCount
     MAX-ACCESS  read-only
     STATUS  current
     DESCRIPTION
       "The counter associated with the number of Coding
       Violations encountered by a
       SONET/SDH Line in a
       particular 15-minute interval
       in the past 24 hours."
     ::= { sonetLineIntervalEntry 4 }
 sonetLineIntervalUASs OBJECT-TYPE
     SYNTAX  PerfIntervalCount
     MAX-ACCESS  read-only
     STATUS  current
     DESCRIPTION
       "The counter associated with the
       number of Unavailable Seconds
       encountered by a SONET/SDH Line in
       a particular 15-minute interval
       in the past 24 hours."
     ::= { sonetLineIntervalEntry 5 }
 sonetLineIntervalValidData OBJECT-TYPE
     SYNTAX  TruthValue
     MAX-ACCESS  read-only
     STATUS  current
     DESCRIPTION
        "This variable indicates if the data for this
         interval is valid."
     ::= { sonetLineIntervalEntry 6 }
  1. - The SONET/SDH Far End Line group.
  2. - This group may only be implemented by SONET/SDH (LTEs)
  3. - systems that provide for a far end block error (FEBE)
  4. - information at the SONET/SDH Line Layer.
  1. - This group consists of two tables:
  2. - SONET/SDH Far End Line Current Table
  3. - SONET/SDH Far End Line Interval Table
  1. - The SONET/SDH Far End Line Current Table
  1. - The SONET/SDH Far End Line Current table contains
  2. - various statistics being
  3. - collected for the current 15 minute interval.
  4. - The statistics are collected from the far end

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  1. - block error code (FEBE)
  2. - within the third Z2 byte of the Line Overhead
  3. - in Broadband ISDN applications.
  4. - The definitions are the same as described for
  5. - the near-end information.
 sonetFarEndLineCurrentTable OBJECT-TYPE
     SYNTAX  SEQUENCE OF SonetFarEndLineCurrentEntry
     MAX-ACCESS  not-accessible
     STATUS  current
     DESCRIPTION
       "The SONET/SDH Far End Line Current table."
     ::= { sonetFarEndLine 1 }
 sonetFarEndLineCurrentEntry OBJECT-TYPE
     SYNTAX  SonetFarEndLineCurrentEntry
     MAX-ACCESS  not-accessible
     STATUS  current
     DESCRIPTION
       "An entry in the SONET/SDH Far End Line Current table."
     INDEX   { ifIndex }
     ::= { sonetFarEndLineCurrentTable 1 }
 SonetFarEndLineCurrentEntry ::=
     SEQUENCE {
         sonetFarEndLineCurrentESs       PerfCurrentCount,
         sonetFarEndLineCurrentSESs      PerfCurrentCount,
         sonetFarEndLineCurrentCVs       PerfCurrentCount,
         sonetFarEndLineCurrentUASs      PerfCurrentCount
        }
 sonetFarEndLineCurrentESs OBJECT-TYPE
    SYNTAX  PerfCurrentCount
    MAX-ACCESS  read-only
    STATUS  current
    DESCRIPTION
        "The counter associated with the number of Far
        End Errored Seconds encountered by a SONET/SDH
        interface in the current 15 minute interval."
    ::= { sonetFarEndLineCurrentEntry 1 }
 sonetFarEndLineCurrentSESs OBJECT-TYPE
    SYNTAX  PerfCurrentCount
    MAX-ACCESS  read-only
    STATUS  current
    DESCRIPTION
        "The counter associated with the number of
        Far End Severely Errored Seconds

Tesink Standards Track [Page 33] RFC 3592 SONET/SDH Objects September 2003

        encountered by a SONET/SDH Medium/Section/Line
        interface in the current 15 minute
        interval."
    ::= { sonetFarEndLineCurrentEntry 2 }
 sonetFarEndLineCurrentCVs OBJECT-TYPE
    SYNTAX  PerfCurrentCount
    MAX-ACCESS  read-only
    STATUS  current
    DESCRIPTION
        "The counter associated with the number of
        Far End Coding Violations reported via
        the far end block error count
        encountered by a
        SONET/SDH Medium/Section/Line
        interface in the current 15 minute interval."
    ::= { sonetFarEndLineCurrentEntry 3 }
 sonetFarEndLineCurrentUASs OBJECT-TYPE
    SYNTAX  PerfCurrentCount
    MAX-ACCESS  read-only
    STATUS  current
    DESCRIPTION
        "The counter associated with the number of
        Far End Unavailable Seconds
        encountered by a
        SONET/SDH Medium/Section/Line
        interface in the current 15 minute interval."
    ::= { sonetFarEndLineCurrentEntry 4 }
  1. - The SONET/SDH Far End Line Interval Table
  1. - The SONET/SDH Far End Line Interval Table
  2. - contains various statistics
  3. - collected by each system over a maximum
  4. - of the previous 24 hours of
  5. - operation. The past 24 hours may be broken into 96
  6. - completed 15 minute intervals.
  7. - A system is required to store at
  8. - least 4 completed 15 minute interval.
  9. - 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."

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    ::= { sonetFarEndLine 2 }
 sonetFarEndLineIntervalEntry OBJECT-TYPE
    SYNTAX  SonetFarEndLineIntervalEntry
    MAX-ACCESS  not-accessible
    STATUS  current
    DESCRIPTION
      "An entry in the SONET/SDH Far
      End Line Interval table."
    INDEX   { ifIndex,
              sonetFarEndLineIntervalNumber }
    ::= { sonetFarEndLineIntervalTable 1 }
 SonetFarEndLineIntervalEntry ::=
     SEQUENCE {
          sonetFarEndLineIntervalNumber    Integer32,
          sonetFarEndLineIntervalESs       PerfIntervalCount,
          sonetFarEndLineIntervalSESs      PerfIntervalCount,
          sonetFarEndLineIntervalCVs       PerfIntervalCount,
          sonetFarEndLineIntervalUASs      PerfIntervalCount,
          sonetFarEndLineIntervalValidData TruthValue
     }
 sonetFarEndLineIntervalNumber OBJECT-TYPE
    SYNTAX  Integer32 (1..96)
    MAX-ACCESS  not-accessible
    STATUS  current
    DESCRIPTION
          "A number between 1 and 96, which identifies the
          interval for which the set of statistics is available.
          The interval identified by 1 is the most recently
          completed 15 minute interval,
          and the interval identified
          by N is the interval immediately preceding the
          one identified
          by N-1."
    ::= { sonetFarEndLineIntervalEntry 1 }
 sonetFarEndLineIntervalESs OBJECT-TYPE
    SYNTAX  PerfIntervalCount
    MAX-ACCESS  read-only
    STATUS  current
    DESCRIPTION
         "The counter associated with the number of
         Far End Errored Seconds encountered
         by a SONET/SDH Line
         interface in a particular 15-minute interval
         in the past 24 hours."

Tesink Standards Track [Page 35] RFC 3592 SONET/SDH Objects September 2003

   ::= { sonetFarEndLineIntervalEntry 2 }
 sonetFarEndLineIntervalSESs OBJECT-TYPE
    SYNTAX  PerfIntervalCount
    MAX-ACCESS  read-only
    STATUS  current
    DESCRIPTION
         "The counter associated with the number of
         Far End Severely Errored Seconds
         encountered by a SONET/SDH Line
         interface in a particular 15-minute interval
         in the past 24 hours."
   ::= { sonetFarEndLineIntervalEntry 3 }
 sonetFarEndLineIntervalCVs OBJECT-TYPE
     SYNTAX  PerfIntervalCount
     MAX-ACCESS  read-only
     STATUS  current
     DESCRIPTION
          "The counter associated with the number of
          Far End Coding Violations reported via
          the far end block error count
          encountered by a
          SONET/SDH Line
          interface in a particular 15-minute interval
          in the past 24 hours."
     ::= { sonetFarEndLineIntervalEntry 4 }
 sonetFarEndLineIntervalUASs OBJECT-TYPE
    SYNTAX  PerfIntervalCount
    MAX-ACCESS  read-only
    STATUS  current
    DESCRIPTION
        "The counter associated with the number of
        Far End Unavailable Seconds
        encountered by a
        SONET/SDH Line
        interface in a particular 15-minute interval
        in the past 24 hours."
    ::= { sonetFarEndLineIntervalEntry 5 }
 sonetFarEndLineIntervalValidData OBJECT-TYPE
     SYNTAX  TruthValue
     MAX-ACCESS  read-only
     STATUS  current
     DESCRIPTION
        "This variable indicates if the data for this
         interval is valid."

Tesink Standards Track [Page 36] RFC 3592 SONET/SDH Objects September 2003

     ::= { sonetFarEndLineIntervalEntry 6 }
  1. - the SONET/SDH Path group
  1. - this group consists of 2 tables:
  2. - - the SONET/SDH Path Current Table
  3. - - the SONET/SDH Path Interval Table
  1. - the SONET/SDH Path Current Table
  1. - The SONET/SDH Path
  2. - current table contains various statistics
  3. - being collected for the current 15 minute interval.
 sonetPathCurrentTable OBJECT-TYPE
     SYNTAX  SEQUENCE OF SonetPathCurrentEntry
     MAX-ACCESS  not-accessible
     STATUS  current
     DESCRIPTION
      "The SONET/SDH Path Current table."
 ::= { sonetPath 1 }
 sonetPathCurrentEntry OBJECT-TYPE
     SYNTAX  SonetPathCurrentEntry
     MAX-ACCESS  not-accessible
     STATUS  current
     DESCRIPTION
      "An entry in the SONET/SDH Path Current table."
     INDEX   { ifIndex }
 ::= { sonetPathCurrentTable 1 }
 SonetPathCurrentEntry ::=
     SEQUENCE {
         sonetPathCurrentWidth      INTEGER,
         sonetPathCurrentStatus     Integer32,
         sonetPathCurrentESs        PerfCurrentCount,
         sonetPathCurrentSESs       PerfCurrentCount,
         sonetPathCurrentCVs        PerfCurrentCount,
         sonetPathCurrentUASs       PerfCurrentCount
     }
 sonetPathCurrentWidth OBJECT-TYPE
     SYNTAX  INTEGER  {
             sts1(1),
             sts3cSTM1(2),
             sts12cSTM4(3),
             sts24c(4),
             sts48cSTM16(5),

Tesink Standards Track [Page 37] RFC 3592 SONET/SDH Objects September 2003

             sts192cSTM64(6),
             sts768cSTM256(7)
      }
     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, 48, 192 and 768.
      STS-1 is equal to 51.84 Mbps.  For SDH, the assigned
      types are the STM-Nc VCs, where N = 1, 4, 16, 64 and 256."
 ::= { sonetPathCurrentEntry 1 }
 sonetPathCurrentStatus OBJECT-TYPE
     SYNTAX  Integer32 (1..62)
     MAX-ACCESS  read-only
     STATUS  current
     DESCRIPTION
       "This variable indicates the
       status of the interface.
       The sonetPathCurrentStatus
       is a bit map represented
       as a sum, therefore,
       it can represent multiple defects
       simultaneously.
       The sonetPathNoDefect should be
       set if and only if
       no other flag is set.
       The various bit positions are:
          1   sonetPathNoDefect
          2   sonetPathSTSLOP
          4   sonetPathSTSAIS
          8   sonetPathSTSRDI
         16   sonetPathUnequipped
         32   sonetPathSignalLabelMismatch"
 ::= { sonetPathCurrentEntry 2 }
 sonetPathCurrentESs OBJECT-TYPE
     SYNTAX  PerfCurrentCount
     MAX-ACCESS  read-only
     STATUS  current
     DESCRIPTION
      "The counter associated with the number of Errored
      Seconds encountered by a SONET/SDH
      Path in the current 15 minute interval."
 ::= { sonetPathCurrentEntry 3 }

Tesink Standards Track [Page 38] RFC 3592 SONET/SDH Objects September 2003

 sonetPathCurrentSESs OBJECT-TYPE
     SYNTAX  PerfCurrentCount
     MAX-ACCESS  read-only
     STATUS  current
     DESCRIPTION
      "The counter associated with the number of
      Severely Errored Seconds
      encountered by a SONET/SDH Path in the current 15
      minute
      interval."
 ::= { sonetPathCurrentEntry 4 }
 sonetPathCurrentCVs OBJECT-TYPE
     SYNTAX  PerfCurrentCount
     MAX-ACCESS  read-only
     STATUS  current
     DESCRIPTION
      "The counter associated with the number of Coding
      Violations encountered by a
      SONET/SDH Path in the current 15 minute interval."
 ::= { sonetPathCurrentEntry 5 }
 sonetPathCurrentUASs OBJECT-TYPE
     SYNTAX  PerfCurrentCount
     MAX-ACCESS  read-only
     STATUS  current
     DESCRIPTION
      "The counter associated with the number of
      Unavailable Seconds
      encountered by a Path in the current
      15 minute interval."
 ::= { sonetPathCurrentEntry 6 }
  1. - the SONET/SDH Path Interval Table
  1. - The SONET/SDH Path Interval Table
  2. - contains various statistics
  3. - collected by each system over a maximum
  4. - of the previous 24 hours of
  5. - operation. The past 24 hours may be broken into 96
  6. - completed 15 minute intervals.
  7. - A system is required to store at
  8. - least 4 completed 15 minute interval.
  9. - The default value is 32 intervals.

Tesink Standards Track [Page 39] RFC 3592 SONET/SDH Objects September 2003

 sonetPathIntervalTable OBJECT-TYPE
     SYNTAX  SEQUENCE OF SonetPathIntervalEntry
     MAX-ACCESS  not-accessible
     STATUS  current
     DESCRIPTION
      "The SONET/SDH Path Interval table."
 ::= { sonetPath 2 }
 sonetPathIntervalEntry OBJECT-TYPE
     SYNTAX  SonetPathIntervalEntry
     MAX-ACCESS  not-accessible
     STATUS  current
     DESCRIPTION
      "An entry in the SONET/SDH Path Interval table."
     INDEX   { ifIndex,
               sonetPathIntervalNumber }
 ::= { sonetPathIntervalTable 1 }
 SonetPathIntervalEntry ::=
     SEQUENCE {
          sonetPathIntervalNumber     Integer32,
          sonetPathIntervalESs        PerfIntervalCount,
          sonetPathIntervalSESs       PerfIntervalCount,
          sonetPathIntervalCVs        PerfIntervalCount,
          sonetPathIntervalUASs       PerfIntervalCount,
          sonetPathIntervalValidData  TruthValue
     }
 sonetPathIntervalNumber OBJECT-TYPE
     SYNTAX  Integer32 (1..96)
     MAX-ACCESS  not-accessible
     STATUS  current
     DESCRIPTION
        "A number between 1 and 96, which identifies the
        interval for which the set of statistics is available.
        The interval identified by 1 is the most recently
        completed 15 minute interval,
        and the interval identified
        by N is the interval immediately preceding the
        one identified
        by N-1."
 ::= { sonetPathIntervalEntry 1 }
 sonetPathIntervalESs OBJECT-TYPE
     SYNTAX  PerfIntervalCount
     MAX-ACCESS  read-only
     STATUS  current
     DESCRIPTION

Tesink Standards Track [Page 40] RFC 3592 SONET/SDH Objects September 2003

      "The counter associated with the number of
      Errored Seconds encountered
      by a SONET/SDH Path in a
      particular 15-minute interval
      in the past 24 hours."
 ::= { sonetPathIntervalEntry 2 }
 sonetPathIntervalSESs OBJECT-TYPE
     SYNTAX  PerfIntervalCount
     MAX-ACCESS  read-only
     STATUS  current
     DESCRIPTION
      "The counter associated with the number of
      Severely Errored Seconds
      encountered by a SONET/SDH Path in
      a particular 15-minute interval
      in the past 24 hours."
 ::= { sonetPathIntervalEntry 3 }
 sonetPathIntervalCVs OBJECT-TYPE
     SYNTAX  PerfIntervalCount
     MAX-ACCESS  read-only
     STATUS  current
     DESCRIPTION
      "The counter associated with the number of Coding
      Violations encountered by a
      SONET/SDH Path in a particular 15-minute interval
      in the past 24 hours."
 ::= { sonetPathIntervalEntry 4 }
 sonetPathIntervalUASs OBJECT-TYPE
     SYNTAX  PerfIntervalCount
     MAX-ACCESS  read-only
     STATUS  current
     DESCRIPTION
      "The counter associated with the number of
      Unavailable Seconds
      encountered by a Path in a
      particular 15-minute interval
      in the past 24 hours."
 ::= { sonetPathIntervalEntry 5 }
 sonetPathIntervalValidData OBJECT-TYPE
     SYNTAX  TruthValue
     MAX-ACCESS  read-only
     STATUS  current
     DESCRIPTION
        "This variable indicates if the data for this

Tesink Standards Track [Page 41] RFC 3592 SONET/SDH Objects September 2003

         interval is valid."
     ::= { sonetPathIntervalEntry 6 }
  1. - The SONET/SDH Far End Path group
  1. - This group consists of two tables:
  2. - - SONET/SDH Far End Path Current Table
  3. - - SONET/SDH Far End Path Interval Table
  1. - The SONET/SDH Far End Path Current Table
  1. - The SONET/SDH Far End Path Current table
  2. - contains various statistics
  3. - being collected for the current 15 minute interval.
  4. - The statistics are collected from
  5. - the far end block error code
  6. - (FEBE) within the G1 byte of the Path Overhead.
  7. - The definitions are the same as described for
  8. - the near-end information.
 sonetFarEndPathCurrentTable OBJECT-TYPE
     SYNTAX  SEQUENCE OF SonetFarEndPathCurrentEntry
     MAX-ACCESS  not-accessible
     STATUS  current
     DESCRIPTION
          "The SONET/SDH Far End Path Current table."
     ::= { sonetFarEndPath 1 }
 sonetFarEndPathCurrentEntry OBJECT-TYPE
     SYNTAX  SonetFarEndPathCurrentEntry
     MAX-ACCESS  not-accessible
     STATUS  current
     DESCRIPTION
          "An entry in the SONET/SDH Far End Path Current table."
     INDEX   { ifIndex }
     ::= { sonetFarEndPathCurrentTable 1 }
 SonetFarEndPathCurrentEntry ::=
     SEQUENCE {
         sonetFarEndPathCurrentESs       PerfCurrentCount,
         sonetFarEndPathCurrentSESs      PerfCurrentCount,
         sonetFarEndPathCurrentCVs       PerfCurrentCount,
         sonetFarEndPathCurrentUASs      PerfCurrentCount
     }

Tesink Standards Track [Page 42] RFC 3592 SONET/SDH Objects September 2003

 sonetFarEndPathCurrentESs OBJECT-TYPE
     SYNTAX  PerfCurrentCount
     MAX-ACCESS  read-only
     STATUS  current
     DESCRIPTION
          "The counter associated with the number of Far
          End Errored Seconds encountered by a SONET/SDH
          interface in the current 15 minute interval."
     ::= { sonetFarEndPathCurrentEntry 1 }
 sonetFarEndPathCurrentSESs OBJECT-TYPE
     SYNTAX  PerfCurrentCount
     MAX-ACCESS  read-only
     STATUS  current
     DESCRIPTION
          "The counter associated with the number of
          Far End Severely Errored Seconds
          encountered by a SONET/SDH Path
          interface in the current 15 minute
          interval."
     ::= { sonetFarEndPathCurrentEntry 2 }
 sonetFarEndPathCurrentCVs OBJECT-TYPE
     SYNTAX  PerfCurrentCount
     MAX-ACCESS  read-only
     STATUS  current
     DESCRIPTION
          "The counter associated with the number of
          Far End Coding Violations reported via
          the far end block error count
          encountered by a
          SONET/SDH Path interface in
          the current 15 minute interval."
     ::= { sonetFarEndPathCurrentEntry 3 }
 sonetFarEndPathCurrentUASs OBJECT-TYPE
    SYNTAX  PerfCurrentCount
    MAX-ACCESS  read-only
    STATUS  current
    DESCRIPTION
        "The counter associated with the number of
        Far End Unavailable Seconds
        encountered by a
        SONET/SDH Path interface in
        the current 15 minute interval."
    ::= { sonetFarEndPathCurrentEntry 4 }

Tesink Standards Track [Page 43] RFC 3592 SONET/SDH Objects September 2003

  1. - The SONET/SDH Far End Path Interval Table
  1. - The SONET/SDH Far End Path Interval Table
  2. - contains various statistics
  3. - collected by each system over a maximum
  4. - of the previous 24 hours of
  5. - operation. The past 24 hours may be broken into 96
  6. - completed 15 minute intervals.
  7. - A system is required to store at
  8. - least 4 completed 15 minute interval.
  9. - The default value is 32 intervals.
 sonetFarEndPathIntervalTable OBJECT-TYPE
     SYNTAX  SEQUENCE OF SonetFarEndPathIntervalEntry
     MAX-ACCESS  not-accessible
     STATUS  current
     DESCRIPTION
         "The SONET/SDH Far End Path Interval table."
     ::= { sonetFarEndPath 2 }
 sonetFarEndPathIntervalEntry OBJECT-TYPE
     SYNTAX  SonetFarEndPathIntervalEntry
     MAX-ACCESS  not-accessible
     STATUS  current
     DESCRIPTION
        "An entry in the SONET/SDH Far
        End Path Interval table."
     INDEX   { ifIndex,
               sonetFarEndPathIntervalNumber }
     ::= { sonetFarEndPathIntervalTable 1 }
 SonetFarEndPathIntervalEntry ::=
     SEQUENCE {
          sonetFarEndPathIntervalNumber     Integer32,
          sonetFarEndPathIntervalESs        PerfIntervalCount,
          sonetFarEndPathIntervalSESs       PerfIntervalCount,
          sonetFarEndPathIntervalCVs        PerfIntervalCount,
          sonetFarEndPathIntervalUASs       PerfIntervalCount,
          sonetFarEndPathIntervalValidData  TruthValue
     }
 sonetFarEndPathIntervalNumber OBJECT-TYPE
    SYNTAX  Integer32 (1..96)
    MAX-ACCESS  not-accessible
    STATUS  current
    DESCRIPTION
         "A number between 1 and 96, which identifies the
         interval for which the set of statistics is available.

Tesink Standards Track [Page 44] RFC 3592 SONET/SDH Objects September 2003

         The interval identified by 1 is the most recently
         completed 15 minute interval,
         and the interval identified
         by N is the interval immediately preceding the
         one identified
         by N-1."
    ::= { sonetFarEndPathIntervalEntry 1 }
 sonetFarEndPathIntervalESs OBJECT-TYPE
    SYNTAX  PerfIntervalCount
    MAX-ACCESS  read-only
    STATUS  current
    DESCRIPTION
         "The counter associated with the number of
         Far End Errored Seconds encountered
         by a SONET/SDH Path interface in a
         particular 15-minute interval
         in the past 24 hours."
    ::= { sonetFarEndPathIntervalEntry 2 }
 sonetFarEndPathIntervalSESs OBJECT-TYPE
    SYNTAX  PerfIntervalCount
    MAX-ACCESS  read-only
    STATUS  current
    DESCRIPTION
         "The counter associated with the number of
         Far End Severely Errored Seconds
         encountered by a SONET/SDH Path interface
         in a particular 15-minute interval
         in the past 24 hours."
    ::= { sonetFarEndPathIntervalEntry 3 }
 sonetFarEndPathIntervalCVs OBJECT-TYPE
     SYNTAX  PerfIntervalCount
     MAX-ACCESS  read-only
     STATUS  current
     DESCRIPTION
          "The counter associated with the number of
          Far End Coding Violations reported via
          the far end block error count
          encountered by a
          SONET/SDH Path interface
          in a particular 15-minute interval
          in the past 24 hours."
     ::= { sonetFarEndPathIntervalEntry 4 }

Tesink Standards Track [Page 45] RFC 3592 SONET/SDH Objects September 2003

 sonetFarEndPathIntervalUASs OBJECT-TYPE
    SYNTAX  PerfIntervalCount
    MAX-ACCESS  read-only
    STATUS  current
    DESCRIPTION
        "The counter associated with the number of
        Far End Unavailable Seconds
        encountered by a
        SONET/SDH Path interface in
        a particular 15-minute interval
        in the past 24 hours."
    ::= { sonetFarEndPathIntervalEntry 5 }
 sonetFarEndPathIntervalValidData OBJECT-TYPE
     SYNTAX  TruthValue
     MAX-ACCESS  read-only
     STATUS  current
     DESCRIPTION
        "This variable indicates if the data for this
         interval is valid."
     ::= { sonetFarEndPathIntervalEntry 6 }
  1. - the SONET/SDH Virtual Tributary group
  1. - this group consists of 2 tables:
  2. - - the SONET/SDH VT Current Table
  3. - - the SONET/SDH VT Interval Table
  1. - Corresponding SDH signals for SONET VTs are
  2. - as follows:
  1. - A VT1.5 = TU11
  2. - A VT2 = TU12
  3. - A VT3 = none
  4. - none = TU3
  5. - A VT6 = TU2
  1. - the SONET/SDH VT Current Table
  1. - The SONET/SDH VT current table
  2. - contains various statistics
  3. - being collected for the
  4. - current 15 minute interval.

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 sonetVTCurrentTable OBJECT-TYPE
     SYNTAX  SEQUENCE OF SonetVTCurrentEntry
     MAX-ACCESS  not-accessible
     STATUS  current
     DESCRIPTION
      "The SONET/SDH VT Current table."
 ::= { sonetVT 1 }
 sonetVTCurrentEntry OBJECT-TYPE
     SYNTAX  SonetVTCurrentEntry
     MAX-ACCESS  not-accessible
     STATUS  current
     DESCRIPTION
      "An entry in the SONET/SDH VT Current table."
     INDEX   { ifIndex }
 ::= { sonetVTCurrentTable 1 }
 SonetVTCurrentEntry ::=
     SEQUENCE {
         sonetVTCurrentWidth      INTEGER,
         sonetVTCurrentStatus     Integer32,
         sonetVTCurrentESs        PerfCurrentCount,
         sonetVTCurrentSESs       PerfCurrentCount,
         sonetVTCurrentCVs        PerfCurrentCount,
         sonetVTCurrentUASs       PerfCurrentCount
     }
 sonetVTCurrentWidth OBJECT-TYPE
     SYNTAX  INTEGER {
             vtWidth15VC11(1),
             vtWidth2VC12(2),
             vtWidth3(3),
             vtWidth6VC2(4),
             vtWidth6c(5)
          }
     MAX-ACCESS  read-write
     STATUS  current
     DESCRIPTION
     "A value that indicates the type of the SONET
      VT and SDH VC.  Assigned widths are
      VT1.5/VC11, VT2/VC12, VT3, VT6/VC2, and VT6c."
 ::= { sonetVTCurrentEntry 1 }

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 sonetVTCurrentStatus OBJECT-TYPE
     SYNTAX  Integer32 (1..126)
     MAX-ACCESS  read-only
     STATUS  current
     DESCRIPTION
       "This variable indicates the
       status of the interface.
       The sonetVTCurrentStatus
       is a bit map represented
       as a sum, therefore,
       it can represent multiple defects
       and failures
       simultaneously.
       The sonetVTNoDefect should be
       set if and only if
       no other flag is set.
       The various bit positions are:
          1   sonetVTNoDefect
          2   sonetVTLOP
          4   sonetVTPathAIS
          8   sonetVTPathRDI
         16   sonetVTPathRFI
         32   sonetVTUnequipped
         64   sonetVTSignalLabelMismatch"
 ::= { sonetVTCurrentEntry 2 }
 sonetVTCurrentESs OBJECT-TYPE
     SYNTAX  PerfCurrentCount
     MAX-ACCESS  read-only
     STATUS  current
     DESCRIPTION
      "The counter associated with the number of Errored
      Seconds encountered by a SONET/SDH
      VT in the current 15 minute interval."
 ::= { sonetVTCurrentEntry 3 }
 sonetVTCurrentSESs OBJECT-TYPE
     SYNTAX  PerfCurrentCount
     MAX-ACCESS  read-only
     STATUS  current
     DESCRIPTION
      "The counter associated with the number of
      Severely Errored Seconds
      encountered by a SONET/SDH VT in the current 15 minute
      interval."
 ::= { sonetVTCurrentEntry 4 }

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 sonetVTCurrentCVs OBJECT-TYPE
     SYNTAX  PerfCurrentCount
     MAX-ACCESS  read-only
     STATUS  current
     DESCRIPTION
      "The counter associated with the number of Coding
      Violations encountered by a
      SONET/SDH VT in the current 15 minute interval."
 ::= { sonetVTCurrentEntry 5 }
 sonetVTCurrentUASs OBJECT-TYPE
     SYNTAX  PerfCurrentCount
     MAX-ACCESS  read-only
     STATUS  current
     DESCRIPTION
      "The counter associated with the number of
      Unavailable Seconds
      encountered by a VT in the current
      15 minute interval."
 ::= { sonetVTCurrentEntry 6 }
  1. - the SONET/SDH VT Interval Table
  1. - The SONET/SDH VT Interval Table
  2. - contains various statistics
  3. - collected by each system over a maximum
  4. - of the previous 24 hours of
  5. - operation. The past 24 hours may be broken into 96
  6. - completed 15 minute intervals.
  7. - A system is required to store at
  8. - least 4 completed 15 minute interval.
  9. - 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,

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               sonetVTIntervalNumber }
 ::= { sonetVTIntervalTable 1 }
 SonetVTIntervalEntry ::=
     SEQUENCE {
         sonetVTIntervalNumber     Integer32,
         sonetVTIntervalESs        PerfIntervalCount,
         sonetVTIntervalSESs       PerfIntervalCount,
         sonetVTIntervalCVs        PerfIntervalCount,
         sonetVTIntervalUASs       PerfIntervalCount,
         sonetVTIntervalValidData  TruthValue
     }
 sonetVTIntervalNumber OBJECT-TYPE
     SYNTAX  Integer32 (1..96)
     MAX-ACCESS  not-accessible
     STATUS  current
     DESCRIPTION
       "A number between 1 and 96, which identifies the
       interval for which the set of statistics is available.
       The interval identified by 1 is the most recently
       completed 15 minute interval,
       and the interval identified
       by N is the interval immediately preceding the
       one identified
       by N-1."
 ::= { sonetVTIntervalEntry 1 }
 sonetVTIntervalESs OBJECT-TYPE
     SYNTAX  PerfIntervalCount
     MAX-ACCESS  read-only
     STATUS  current
     DESCRIPTION
      "The counter associated with the number of
      Errored Seconds encountered
      by a SONET/SDH VT in a particular 15-minute interval
      in the past 24 hours."
 ::= { sonetVTIntervalEntry 2 }
 sonetVTIntervalSESs OBJECT-TYPE
     SYNTAX  PerfIntervalCount
     MAX-ACCESS  read-only
     STATUS  current
     DESCRIPTION
      "The counter associated with the number of
      Severely Errored Seconds
      encountered by a SONET/SDH VT
      in a particular 15-minute interval

Tesink Standards Track [Page 50] RFC 3592 SONET/SDH Objects September 2003

      in the past 24 hours."
 ::= { sonetVTIntervalEntry 3 }
 sonetVTIntervalCVs OBJECT-TYPE
     SYNTAX  PerfIntervalCount
     MAX-ACCESS  read-only
     STATUS  current
     DESCRIPTION
      "The counter associated with the number of Coding
      Violations encountered by a
      SONET/SDH VT in a particular 15-minute interval
      in the past 24 hours."
 ::= { sonetVTIntervalEntry 4 }
 sonetVTIntervalUASs OBJECT-TYPE
     SYNTAX  PerfIntervalCount
     MAX-ACCESS  read-only
     STATUS  current
     DESCRIPTION
      "The counter associated with the number of
      Unavailable Seconds
      encountered by a VT in a particular 15-minute interval
      in the past 24 hours."
 ::= { sonetVTIntervalEntry 5 }
 sonetVTIntervalValidData OBJECT-TYPE
     SYNTAX  TruthValue
     MAX-ACCESS  read-only
     STATUS  current
     DESCRIPTION
        "This variable indicates if the data for this
         interval is valid."
     ::= { sonetVTIntervalEntry 6 }
  1. - The SONET/SDH Far End VT group
  1. - This group consists of two tables:
  2. - SONET/SDH Far End VT Current Table
  3. - SONET/SDH Far End VT Interval Table
  1. - The SONET/SDH Far End VT Current
  1. - The SONET/SDH Far End VT Current table
  2. - contains various statistics
  3. - being collected for the current 15 minute interval.
  4. - The statistics are collected from
  5. - the far end block error code
  6. - (FEBE) within the G1 byte of the VT Overhead.

Tesink Standards Track [Page 51] RFC 3592 SONET/SDH Objects September 2003

  1. - The definitions are the same as described for
  2. - the near-end information.
 sonetFarEndVTCurrentTable OBJECT-TYPE
     SYNTAX  SEQUENCE OF SonetFarEndVTCurrentEntry
     MAX-ACCESS  not-accessible
     STATUS  current
     DESCRIPTION
         "The SONET/SDH Far End VT Current table."
     ::= { sonetFarEndVT 1 }
 sonetFarEndVTCurrentEntry OBJECT-TYPE
     SYNTAX  SonetFarEndVTCurrentEntry
     MAX-ACCESS  not-accessible
     STATUS  current
     DESCRIPTION
         "An entry in the SONET/SDH Far End VT Current table."
     INDEX   { ifIndex }
     ::= { sonetFarEndVTCurrentTable 1 }
 SonetFarEndVTCurrentEntry ::=
     SEQUENCE {
         sonetFarEndVTCurrentESs       PerfCurrentCount,
         sonetFarEndVTCurrentSESs      PerfCurrentCount,
         sonetFarEndVTCurrentCVs       PerfCurrentCount,
         sonetFarEndVTCurrentUASs      PerfCurrentCount
     }
 sonetFarEndVTCurrentESs OBJECT-TYPE
     SYNTAX  PerfCurrentCount
     MAX-ACCESS  read-only
     STATUS  current
     DESCRIPTION
         "The counter associated with the number of Far
         End Errored Seconds encountered by a SONET/SDH
         interface in the current 15 minute interval."
 ::= { sonetFarEndVTCurrentEntry 1 }
 sonetFarEndVTCurrentSESs OBJECT-TYPE
     SYNTAX  PerfCurrentCount
     MAX-ACCESS  read-only
     STATUS  current
     DESCRIPTION
         "The counter associated with the number of
         Far End Severely Errored Seconds
         encountered by a SONET/SDH VT interface
         in the current 15 minute
         interval."

Tesink Standards Track [Page 52] RFC 3592 SONET/SDH Objects September 2003

     ::= { sonetFarEndVTCurrentEntry 2 }
 sonetFarEndVTCurrentCVs OBJECT-TYPE
     SYNTAX  PerfCurrentCount
     MAX-ACCESS  read-only
     STATUS  current
     DESCRIPTION
         "The counter associated with the number of
         Far End Coding Violations reported via
         the far end block error count
         encountered by a
         SONET/SDH VT interface
         in the current 15 minute interval."
     ::= { sonetFarEndVTCurrentEntry 3 }
 sonetFarEndVTCurrentUASs OBJECT-TYPE
    SYNTAX  PerfCurrentCount
    MAX-ACCESS  read-only
    STATUS  current
    DESCRIPTION
       "The counter associated with the number of
       Far End Unavailable Seconds
       encountered by a
       SONET/SDH VT interface
       in the current 15 minute interval."
    ::= { sonetFarEndVTCurrentEntry 4 }
  1. - The SONET/SDH Far End VT Interval Table
  1. - The SONET/SDH Far End VT Interval Table
  2. - contains various statistics
  3. - collected by each system over a maximum
  4. - of the previous 24 hours of
  5. - operation. The past 24 hours may be broken into 96
  6. - completed 15 minute intervals.
  7. - A system is required to store at
  8. - least 4 completed 15 minute interval.
  9. - 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 }

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 sonetFarEndVTIntervalEntry OBJECT-TYPE
     SYNTAX  SonetFarEndVTIntervalEntry
     MAX-ACCESS  not-accessible
     STATUS  current
     DESCRIPTION
       "An entry in the SONET/SDH Far
       End VT Interval table."
     INDEX   { ifIndex,
               sonetFarEndVTIntervalNumber }
     ::= { sonetFarEndVTIntervalTable 1 }
 SonetFarEndVTIntervalEntry ::=
    SEQUENCE {
          sonetFarEndVTIntervalNumber     Integer32,
          sonetFarEndVTIntervalESs        PerfIntervalCount,
          sonetFarEndVTIntervalSESs       PerfIntervalCount,
          sonetFarEndVTIntervalCVs        PerfIntervalCount,
          sonetFarEndVTIntervalUASs       PerfIntervalCount,
          sonetFarEndVTIntervalValidData  TruthValue
     }
 sonetFarEndVTIntervalNumber OBJECT-TYPE
     SYNTAX  Integer32 (1..96)
     MAX-ACCESS  not-accessible
     STATUS  current
     DESCRIPTION
        "A number between 1 and 96, which identifies the
        interval for which the set of statistics is available.
        The interval identified by 1 is the most recently
        completed 15 minute interval,
        and the interval identified
        by N is the interval immediately preceding the
        one identified
        by N-1."
     ::= { sonetFarEndVTIntervalEntry 1 }
 sonetFarEndVTIntervalESs OBJECT-TYPE
     SYNTAX  PerfIntervalCount
     MAX-ACCESS  read-only
     STATUS  current
     DESCRIPTION
           "The counter associated with the number of
           Far End Errored Seconds encountered
           by a SONET/SDH VT interface
           in a particular 15-minute interval
           in the past 24 hours."
    ::= { sonetFarEndVTIntervalEntry 2 }

Tesink Standards Track [Page 54] RFC 3592 SONET/SDH Objects September 2003

 sonetFarEndVTIntervalSESs OBJECT-TYPE
     SYNTAX  PerfIntervalCount
     MAX-ACCESS  read-only
     STATUS  current
     DESCRIPTION
           "The counter associated with the number of
           Far End Severely Errored Seconds
           encountered by a SONET/SDH VT interface
           in a particular 15-minute interval
           in the past 24 hours."
     ::= { sonetFarEndVTIntervalEntry 3 }
 sonetFarEndVTIntervalCVs OBJECT-TYPE
     SYNTAX  PerfIntervalCount
     MAX-ACCESS  read-only
     STATUS  current
     DESCRIPTION
          "The counter associated with the number of
          Far End Coding Violations reported via
          the far end block error count
          encountered by a
          SONET/SDH VT interface in a
          particular 15-minute interval
          in the past 24 hours."
     ::= { sonetFarEndVTIntervalEntry 4 }
 sonetFarEndVTIntervalUASs OBJECT-TYPE
    SYNTAX  PerfIntervalCount
    MAX-ACCESS  read-only
    STATUS  current
    DESCRIPTION
        "The counter associated with the number of
        Far End Unavailable Seconds
        encountered by a
        SONET/SDH VT interface in a
        particular 15-minute interval
        in the past 24 hours."
    ::= { sonetFarEndVTIntervalEntry 5 }
 sonetFarEndVTIntervalValidData OBJECT-TYPE
     SYNTAX  TruthValue
     MAX-ACCESS  read-only
     STATUS  current
     DESCRIPTION
        "This variable indicates if the data for this
         interval is valid."
     ::= { sonetFarEndVTIntervalEntry 6 }

Tesink Standards Track [Page 55] RFC 3592 SONET/SDH Objects September 2003

  1. - conformance information
 sonetConformance OBJECT IDENTIFIER ::= { sonetMIB 4 }
 sonetGroups      OBJECT IDENTIFIER ::= { sonetConformance 1 }
 sonetCompliances OBJECT IDENTIFIER ::= { sonetConformance 2 }
  1. - deprecated compliance statement
 sonetCompliance MODULE-COMPLIANCE
     STATUS  deprecated
     DESCRIPTION
             "The compliance statement for SONET/SDH interfaces."
     MODULE  -- this module
         MANDATORY-GROUPS { sonetMediumStuff, sonetSectionStuff }
         GROUP       sonetLineStuff
         DESCRIPTION
             "Implementation of this group is mandatory for all
              SONET/SDH systems that terminate SONET/SDH Lines,
              Paths or Virtual Tributaries."
         GROUP       sonetFarEndLineStuff
         DESCRIPTION
             "Implementation of this group is optional for all
              SONET/SDH systems that terminate SONET/SDH Lines,
              Paths or Virtual Tributaries, and that
              provide for a far end block error (FEBE)
              information at the SONET/SDH Line Layer."
         GROUP       sonetPathStuff
         DESCRIPTION
             "Implementation of this group is mandatory for all
              SONET/SDH systems that terminate SONET/SDH
              Paths or Virtual Tributaries."
         OBJECT      sonetPathCurrentWidth
         MIN-ACCESS  read-only
         DESCRIPTION
             "Write access is not required."
         GROUP       sonetFarEndPathStuff
         DESCRIPTION
             "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."

Tesink Standards Track [Page 56] RFC 3592 SONET/SDH Objects September 2003

         GROUP       sonetVTStuff
         DESCRIPTION
             "Implementation of this group is mandatory for all
              SONET/SDH systems that terminate SONET/SDH Virtual
              Tributaries."
         OBJECT      sonetVTCurrentWidth
         MIN-ACCESS  read-only
         DESCRIPTION
             "Write access is not required."
         GROUP       sonetFarEndVTStuff
         DESCRIPTION
             "Implementation of this group is optional for all
              SONET/SDH systems that terminate the SONET/SDH
              floating Virtual Tributaries, and that process
              Far End information."
     ::= { sonetCompliances 1 }
  1. - current compliance statements
 sonetCompliance2 MODULE-COMPLIANCE
     STATUS  current
     DESCRIPTION
             "The compliance statement for SONET/SDH interfaces."
     MODULE  -- this module
         MANDATORY-GROUPS { sonetMediumStuff2, sonetSectionStuff2 }
         OBJECT      sonetMediumType
         MIN-ACCESS  read-only
         DESCRIPTION
             "Write access is not required."
         OBJECT      sonetMediumLineCoding
         MIN-ACCESS  read-only
         DESCRIPTION
             "Write access is not required."
         OBJECT      sonetMediumLineType
         MIN-ACCESS  read-only
         DESCRIPTION
             "Write access is not required."
         OBJECT      sonetMediumCircuitIdentifier
         MIN-ACCESS  read-only
         DESCRIPTION

Tesink Standards Track [Page 57] RFC 3592 SONET/SDH Objects September 2003

             "Write access is not required."
         OBJECT      sonetMediumLoopbackConfig
         MIN-ACCESS  read-only
         DESCRIPTION
             "Write access is not required."
         OBJECT      sonetSESthresholdSet
         MIN-ACCESS  read-only
         DESCRIPTION
           "Write access is not required, and only one
           of the enumerated values need be supported."
         GROUP       sonetLineStuff2
         DESCRIPTION
             "Implementation of this group is mandatory for all
              SONET/SDH systems that terminate SONET/SDH Lines,
              Paths or Virtual Tributaries."
         GROUP       sonetFarEndLineStuff2
         DESCRIPTION
             "Implementation of this group is optional for all
              SONET/SDH systems that terminate SONET/SDH Lines,
              Paths or Virtual Tributaries, and that
              provide for a far end block error (FEBE)
              information at the SONET/SDH Line Layer."
         GROUP       sonetPathStuff2
         DESCRIPTION
             "Implementation of this group is mandatory for all
              SONET/SDH systems that terminate SONET/SDH
              Paths or Virtual Tributaries."
         OBJECT      sonetPathCurrentWidth
         MIN-ACCESS  read-only
         DESCRIPTION
             "Write access is not required."
         GROUP       sonetFarEndPathStuff2
         DESCRIPTION
             "Implementation of this group is optional for all
              SONET/SDH systems that terminate SONET/SDH
              Paths or Virtual Tributaries, and that process
              Far End information."
         GROUP       sonetVTStuff2
         DESCRIPTION
             "Implementation of this group is mandatory for all

Tesink Standards Track [Page 58] RFC 3592 SONET/SDH Objects September 2003

              SONET/SDH systems that terminate SONET/SDH Virtual
              Tributaries."
         OBJECT      sonetVTCurrentWidth
         MIN-ACCESS  read-only
         DESCRIPTION
             "Write access is not required."
         GROUP       sonetFarEndVTStuff2
         DESCRIPTION
             "Implementation of this group is optional for all
              SONET/SDH systems that terminate the SONET/SDH
              floating Virtual Tributaries, and that process
              Far End information."
     ::= { sonetCompliances 2 }
  1. - units of conformance
  1. - deprecated groups
 sonetMediumStuff    OBJECT-GROUP
     OBJECTS { sonetMediumType,
               sonetMediumTimeElapsed,
               sonetMediumValidIntervals,
               sonetMediumLineCoding,
               sonetMediumLineType,
               sonetMediumCircuitIdentifier }
     STATUS  deprecated
     DESCRIPTION
             "A collection of objects providing configuration
             information applicable to all SONET/SDH interfaces."
     ::= { sonetGroups 1 }
 sonetSectionStuff    OBJECT-GROUP
     OBJECTS { sonetSectionCurrentStatus,
               sonetSectionCurrentESs,
               sonetSectionCurrentSESs,
               sonetSectionCurrentSEFSs,
               sonetSectionCurrentCVs,
               sonetSectionIntervalESs,
               sonetSectionIntervalSESs,
               sonetSectionIntervalSEFSs,
               sonetSectionIntervalCVs
  }
     STATUS  deprecated
     DESCRIPTION
             "A collection of objects providing information

Tesink Standards Track [Page 59] RFC 3592 SONET/SDH Objects September 2003

             specific to SONET/SDH Section interfaces."
     ::= { sonetGroups 2 }
 sonetLineStuff    OBJECT-GROUP
     OBJECTS { sonetLineCurrentStatus,
               sonetLineCurrentESs,
               sonetLineCurrentSESs,
               sonetLineCurrentCVs,
               sonetLineCurrentUASs,
               sonetLineIntervalESs,
               sonetLineIntervalSESs,
               sonetLineIntervalCVs,
               sonetLineIntervalUASs }
     STATUS  deprecated
     DESCRIPTION
             "A collection of objects providing information
             specific to SONET/SDH Line interfaces."
     ::= { sonetGroups 3 }
 sonetFarEndLineStuff    OBJECT-GROUP
     OBJECTS { sonetFarEndLineCurrentESs,
               sonetFarEndLineCurrentSESs,
               sonetFarEndLineCurrentCVs,
               sonetFarEndLineCurrentUASs,
               sonetFarEndLineIntervalESs,
               sonetFarEndLineIntervalSESs,
               sonetFarEndLineIntervalCVs,
               sonetFarEndLineIntervalUASs }
     STATUS  deprecated
     DESCRIPTION
             "A collection of objects providing information
             specific to SONET/SDH Line interfaces,
             and maintaining Line Far End information."
     ::= { sonetGroups 4 }
 sonetPathStuff    OBJECT-GROUP
     OBJECTS { sonetPathCurrentWidth,
               sonetPathCurrentStatus,
               sonetPathCurrentESs,
               sonetPathCurrentSESs,
               sonetPathCurrentCVs,
               sonetPathCurrentUASs,
               sonetPathIntervalESs,
               sonetPathIntervalSESs,
               sonetPathIntervalCVs,
               sonetPathIntervalUASs }
     STATUS  deprecated
     DESCRIPTION

Tesink Standards Track [Page 60] RFC 3592 SONET/SDH Objects September 2003

             "A collection of objects providing information
             specific to SONET/SDH Path interfaces."
     ::= { sonetGroups 5 }
 sonetFarEndPathStuff    OBJECT-GROUP
     OBJECTS { sonetFarEndPathCurrentESs,
               sonetFarEndPathCurrentSESs,
               sonetFarEndPathCurrentCVs,
               sonetFarEndPathCurrentUASs,
               sonetFarEndPathIntervalESs,
               sonetFarEndPathIntervalSESs,
               sonetFarEndPathIntervalCVs,
               sonetFarEndPathIntervalUASs }
     STATUS  deprecated
     DESCRIPTION
             "A collection of objects providing information
             specific to SONET/SDH Path interfaces,
             and maintaining Path Far End information."
     ::= { sonetGroups 6 }
 sonetVTStuff    OBJECT-GROUP
     OBJECTS { sonetVTCurrentWidth,
               sonetVTCurrentStatus,
               sonetVTCurrentESs,
               sonetVTCurrentSESs,
               sonetVTCurrentCVs,
               sonetVTCurrentUASs,
               sonetVTIntervalESs,
               sonetVTIntervalSESs,
               sonetVTIntervalCVs,
               sonetVTIntervalUASs }
     STATUS  deprecated
     DESCRIPTION
             "A collection of objects providing information
             specific to SONET/SDH VT interfaces."
     ::= { sonetGroups 7 }
 sonetFarEndVTStuff    OBJECT-GROUP
     OBJECTS { sonetFarEndVTCurrentESs,
               sonetFarEndVTCurrentSESs,
               sonetFarEndVTCurrentCVs,
               sonetFarEndVTCurrentUASs,
               sonetFarEndVTIntervalESs,
               sonetFarEndVTIntervalSESs,
               sonetFarEndVTIntervalCVs,
               sonetFarEndVTIntervalUASs }
     STATUS  deprecated
     DESCRIPTION

Tesink Standards Track [Page 61] RFC 3592 SONET/SDH Objects September 2003

             "A collection of objects providing information
             specific to SONET/SDH VT interfaces,
             and maintaining VT Far End information."
     ::= { sonetGroups 8 }
  1. - current groups
 sonetMediumStuff2    OBJECT-GROUP
     OBJECTS { sonetMediumType,
               sonetMediumTimeElapsed,
               sonetMediumValidIntervals,
               sonetMediumLineCoding,
               sonetMediumLineType,
               sonetMediumCircuitIdentifier,
               sonetMediumInvalidIntervals,
               sonetMediumLoopbackConfig,
               sonetSESthresholdSet }
     STATUS  current
     DESCRIPTION
             "A collection of objects providing configuration
             information applicable to all SONET/SDH interfaces."
     ::= { sonetGroups 9 }
 sonetSectionStuff2    OBJECT-GROUP
     OBJECTS { sonetSectionCurrentStatus,
               sonetSectionCurrentESs,
               sonetSectionCurrentSESs,
               sonetSectionCurrentSEFSs,
               sonetSectionCurrentCVs,
               sonetSectionIntervalESs,
               sonetSectionIntervalSESs,
               sonetSectionIntervalSEFSs,
               sonetSectionIntervalCVs,
               sonetSectionIntervalValidData }
     STATUS  current
     DESCRIPTION
             "A collection of objects providing information
             specific to SONET/SDH Section interfaces."
     ::= { sonetGroups 10 }
 sonetLineStuff2    OBJECT-GROUP
     OBJECTS { sonetLineCurrentStatus,
               sonetLineCurrentESs,
               sonetLineCurrentSESs,
               sonetLineCurrentCVs,
               sonetLineCurrentUASs,
               sonetLineIntervalESs,
               sonetLineIntervalSESs,

Tesink Standards Track [Page 62] RFC 3592 SONET/SDH Objects September 2003

               sonetLineIntervalCVs,
               sonetLineIntervalUASs,
               sonetLineIntervalValidData }
     STATUS  current
     DESCRIPTION
             "A collection of objects providing information
             specific to SONET/SDH Line interfaces."
     ::= { sonetGroups 11 }
 sonetPathStuff2    OBJECT-GROUP
     OBJECTS { sonetPathCurrentWidth,
               sonetPathCurrentStatus,
               sonetPathCurrentESs,
               sonetPathCurrentSESs,
               sonetPathCurrentCVs,
               sonetPathCurrentUASs,
               sonetPathIntervalESs,
               sonetPathIntervalSESs,
               sonetPathIntervalCVs,
               sonetPathIntervalUASs,
               sonetPathIntervalValidData }
     STATUS  current
     DESCRIPTION
             "A collection of objects providing information
             specific to SONET/SDH Path interfaces."
     ::= { sonetGroups 12 }
 sonetVTStuff2    OBJECT-GROUP
     OBJECTS { sonetVTCurrentWidth,
               sonetVTCurrentStatus,
               sonetVTCurrentESs,
               sonetVTCurrentSESs,
               sonetVTCurrentCVs,
               sonetVTCurrentUASs,
               sonetVTIntervalESs,
               sonetVTIntervalSESs,
               sonetVTIntervalCVs,
               sonetVTIntervalUASs,
               sonetVTIntervalValidData }
     STATUS  current
     DESCRIPTION
             "A collection of objects providing information
             specific to SONET/SDH VT interfaces."
     ::= { sonetGroups 13 }
 sonetFarEndLineStuff2    OBJECT-GROUP
     OBJECTS { sonetFarEndLineCurrentESs,
               sonetFarEndLineCurrentSESs,

Tesink Standards Track [Page 63] RFC 3592 SONET/SDH Objects September 2003

               sonetFarEndLineCurrentCVs,
               sonetFarEndLineCurrentUASs,
               sonetFarEndLineIntervalESs,
               sonetFarEndLineIntervalSESs,
               sonetFarEndLineIntervalCVs,
               sonetFarEndLineIntervalUASs,
               sonetFarEndLineIntervalValidData }
     STATUS  current
     DESCRIPTION
             "A collection of objects providing information
             specific to SONET/SDH Line interfaces,
             and maintaining Line Far End information."
     ::= { sonetGroups 14 }
 sonetFarEndPathStuff2    OBJECT-GROUP
     OBJECTS { sonetFarEndPathCurrentESs,
               sonetFarEndPathCurrentSESs,
               sonetFarEndPathCurrentCVs,
               sonetFarEndPathCurrentUASs,
               sonetFarEndPathIntervalESs,
               sonetFarEndPathIntervalSESs,
               sonetFarEndPathIntervalCVs,
               sonetFarEndPathIntervalUASs,
               sonetFarEndPathIntervalValidData }
     STATUS  current
     DESCRIPTION
             "A collection of objects providing information
             specific to SONET/SDH Path interfaces,
             and maintaining Path Far End information."
     ::= { sonetGroups 15 }
 sonetFarEndVTStuff2    OBJECT-GROUP
     OBJECTS { sonetFarEndVTCurrentESs,
               sonetFarEndVTCurrentSESs,
               sonetFarEndVTCurrentCVs,
               sonetFarEndVTCurrentUASs,
               sonetFarEndVTIntervalESs,
               sonetFarEndVTIntervalSESs,
               sonetFarEndVTIntervalCVs,
               sonetFarEndVTIntervalUASs,
               sonetFarEndVTIntervalValidData }
     STATUS  current
     DESCRIPTION
             "A collection of objects providing information
             specific to SONET/SDH VT interfaces,
             and maintaining VT Far End information."
     ::= { sonetGroups 16 }

Tesink Standards Track [Page 64] RFC 3592 SONET/SDH Objects September 2003

 END

5. Acknowledgments

 This specification is a product of the AToM MIB Working Group.  The
 author would like to acknowledge Mike Heard for his many valuable
 contributions to this memo.

6. Security Considerations

 There are a number of management objects defined in this MIB module
 that have a MAX-ACCESS clause of read-write:  sonetMediumType,
 sonetMediumLineCoding, sonetMediumLineType,
 sonetMediumCircuitIdentifier, sonetMediumLoopbackConfig,
 sonetSESthresholdSet, sonetPathCurrentWidth, and sonetVTCurrentWidth.
 It is possible for writes to these objects to have disruptive effects
 on network operation that range from invalid performance data to
 traffic interruptions.  Users of this MIB module must therefore be
 aware that support for SET operations in a non-secure environment
 without proper protection can have a negative effect on network
 operations.
 The readable objects in this MIB module (i.e., the objects with a
 MAX-ACCESS other than not-accessible) may be considered sensitive in
 some environments since, collectively, they provide extensive
 information about the performance of interfaces in SONET/SDH
 equipment or networks and can reveal some aspects of their
 configuration.  In such environments it is important to control even
 GET and NOTIFY access to these objects and possibly to encrypt the
 values of these objects when sending them over the network via SNMP.
 SNMP versions prior to SNMPv3 did not include adequate security.
 Even if the network itself is secure (for example by using IPSec),
 even then, there is no control as to who on the secure network is
 allowed to access and GET/SET (read/change/create/delete) the objects
 in this MIB module.
 It is RECOMMENDED that implementers consider the security features as
 provided by the SNMPv3 framework (see [RFC3410], section 8),
 including full support for the SNMPv3 cryptographic mechanisms (for
 authentication and privacy).
 Further, deployment of SNMP versions prior to SNMPv3 is NOT
 RECOMMENDED.  Instead, it is RECOMMENDED to deploy SNMPv3 and to
 enable cryptographic security.  It is then a customer/operator
 responsibility to ensure that the SNMP entity giving access to an

Tesink Standards Track [Page 65] RFC 3592 SONET/SDH Objects September 2003

 instance of this MIB module is properly configured to give access to
 the objects only to those principals (users) that have legitimate
 rights to indeed GET or SET (change/create/delete) them.

7. References

7.1. Normative References

 [RFC2119]    Bradner, S., "Key words for use in RFCs to Indicate
              Requirements Levels", BCP 14, RFC 2119, March 1997.
 [RFC2578]    McCloghrie, K., Perkins, D. and J. Schoenwaelder,
              "Structure of Management Information Version 2 (SMIv2)",
              STD 58, RFC 2578, April 1999.
 [RFC2579]    McCloghrie, K., Perkins, D. and J. Schoenwaelder,
              "Textual Conventions for SMIv2", STD 58, RFC 2579, April
              1999.
 [RFC2580]    McCloghrie, K., Perkins, D. and J. Schoenwaelder,
              "Conformance Statements for SMIv2", STD 58, RFC 2580,
              April 1999.
 [RFC3593]    Tesink, K., "Textual Conventions for MIB Modules Using
              Performance History Based on 15 Minute Intervals", RFC
              3593, September 2003.
 [T1.105a]    American National Standard for Telecommunications -
              Digital Hierarchy - Optical Interface Rates and Formats
              Specification, ANSI T1.105-1988.
 [T1.105b]    American National Standard for Telecommunications -
              Digital Hierarchy - Optical Interface Rates and Formats
              Specification, ANSI T1.105-1991.
 [T1.106]     American National Standard for Telecommunications -
              Digital Hierarchy - Optical Interface Specification
              (Single-Mode), ANSI T1.106-1988.
 [T1M1.3]     Draft American National Standard for Telecommunications
              - Digital Hierarchy - Layer 1 In-Service Digital
              Transmission Performance Monitoring, T1M1.3/93-005R2,
              July 1993.
 [G.707]      CCITT Recommendation G.707, "Synchronous Digital
              Hierarchy Bit Rates", June 1992.

Tesink Standards Track [Page 66] RFC 3592 SONET/SDH Objects September 2003

 [G.708]      CCITT Recommendation G.708, "Network Node Interface for
              the Synchronous Digital Hierarchy", June 1992.
 [G.709]      CCITT Recommendation G.709, "Synchronous Multiplexing
              Structure", June 1992.
 [G.783]      CCITT Recommendation G.783, "Characteristics of
              Synchronous Digital Hierarchy (SDH) Multiplexing
              Equipment Functional Blocks", November 1992.
 [RFC1213]    McCloghrie, K. and M. Rose, "Management Information Base
              for Network Management of TCP/IP-based internets: MIB-
              II", RFC 1213, March 1991.
 [RFC2863]    McCloghrie, K. and F. Kastenholz, "The Interfaces Group
              MIB", RFC 2863, June 2000.
 [RFC2864]    McCloghrie, K. and G. Hanson, "The Inverted Stack Table
              Extension to the Interfaces Group MIB", RFC 2864, June
              2000.
 [T1.231a]    American National Standard for Telecommunications -
              Digital Hierarchy - Layer 1 In-Service Digital
              Transmission Performance Monitoring, ANSI T1.231-1993,
              September 1993.
 [TR253]      Bellcore TR-NWT-000253, Issue 1, "Synchronous Optical
              Network (SONET) Transport Systems:  Common Generic
              Criteria", December 1991.
 [G.826]      ITU Recommendation G.826, "Error Performance Parameters
              and Objectives for International Constant Bit Rate
              Digital Paths at or above Primary Rate", September 1995
              (COM 13-R57E).
 [GR253]      Bellcore GR-253-CORE, Issue 2, "Synchronous Optical
              Network (SONET) Transport Systems Common Generic
              Criteria", December 1995.
 [T1.231b]    American National Standard for Telecommunications -
              Digital Hierarchy - Layer 1 In-Service Digital
              Transmission Performance Monitoring, ANSI T1.231-1997,
              September 1997.

Tesink Standards Track [Page 67] RFC 3592 SONET/SDH Objects September 2003

7.2. Informative References

 [RFC1595]    Brown, T. and K. Tesink, "Definitions of Managed Objects
              for the SONET/SDH Interface Type", RFC 1595, March 1994.
 [RFC2495]    Fowler, D., "Definitions of Managed Objects for the DS1,
              E1, DS2 and E2 Interface Types", RFC 2495, January 1999.
 [RFC2496]    Fowler, D., "Definitions of Managed Objects for the
              DS3/E3 Interface Type", RFC 2496, January 1999.
 [RFC2558]    Tesink, K., "Definitions of Managed Objects for the
              SONET/SDH Interface Type", RFC 2558, March 1999.
 [RFC3410]    Case, J., Mundy, R., Partain, D. and B. Stewart,
              "Introduction and Applicability Statements for Internet-
              Standard Management Framework", RFC 3410, December 2002.

8. Intellectual Property Statement

 The IETF takes no position regarding the validity or scope of any
 intellectual property or other rights that might be claimed to
 pertain to the implementation or use of the technology described in
 this document or the extent to which any license under such rights
 might or might not be available; neither does it represent that it
 has made any effort to identify any such rights.  Information on the
 IETF's procedures with respect to rights in standards-track and
 standards-related documentation can be found in BCP-11.  Copies of
 claims of rights made available for publication and any assurances of
 licenses to be made available, or the result of an attempt made to
 obtain a general license or permission for the use of such
 proprietary rights by implementors or users of this specification can
 be obtained from the IETF Secretariat.
 The IETF invites any interested party to bring to its attention any
 copyrights, patents or patent applications, or other proprietary
 rights which may cover technology that may be required to practice
 this standard.  Please address the information to the IETF Executive
 Director.

Tesink Standards Track [Page 68] RFC 3592 SONET/SDH Objects September 2003

Appendix A: The delay-line approach to statistics collection.

 According to ANSI T1.231 unavailable time begins at the onset of 10
 contiguous severely errored seconds -- that is, unavailable time
 starts with the first of the 10 contiguous SESs -- and while an
 interface is deemed unavailable all counters for that interface are
 frozen except for the UAS count.  Since changes in the signal state
 lag the data to which they apply by 10 seconds, an implementation
 which wishes to avoid making retroactive adjustments to the counts
 must pass the the one-second statistics through a 10-second delay
 line prior to updating any counters.  That can be done by performing
 the following steps at the end of each one second interval.
 i)   Read near/far end line and path CV counts and alarm status flags
      from the hardware.
 ii)  Accumulate the CV counts for the preceding second and compare
      them to the ES and SES threshold for the layer in question.
      Update the signal state and shift the one-second CV counts and
      ES/SES flags into the 10-element delay line.  Note that far-end
      one-second statistics are to be flagged as "absent" during any
      second in which there is an incoming defect at the layer in
      question or at any lower layer.
 iii) Update the current interval statistics using the signal state
      from the previous update cycle and the one-second CV counts and
      ES/SES flags shifted out of the 10-element delay line.
 This procedure guarantees that the statistical counters will be
 correctly updated at all times, although they lag real time by 10
 seconds.  It is illustrated in the figure below.  At the end of each
 15 minutes interval the current interval counts are transferred to
 the  most recent interval entry and each interval is shifted up by
 one position, with the oldest being discarded if necessary in order
 to make room.  The current interval counts then start over from zero.
 Note, however, that the signal state calculation does not start anew
 at each interval boundary;  rather, signal state information is
 retained across interval boundaries.

Tesink Standards Track [Page 69] RFC 3592 SONET/SDH Objects September 2003

 +--------------------------------------------------------------+
 |          READ COUNTERS & STATUS INFO FROM HARDWARE           |
 |                                                              |
 |LOS OOF/ SECT  LINE LINE LINE LINE  PATH PATH PATH PATH PATH  |
 |    LOF   CV    AIS  CV   RDI FEBE   AIS  LOP  CV   RDI  CV   |
 +--------------------------------------------------------------+
   |   |     |     |    |    |   |      |    |    |    |    |
   |   |     |     |    |    |   |      |    |    |    |    |
   V   V     V     V    V    V   V      V    V    V    V    V
 +--------------------------------------------------------------+
 | ACCUM ONE-SEC STATS, CHK ERR THRESHOLDS, & UPDT SIGNAL STATE |
 |                                                              |
 |                                                              |
 |                  NEAR END/FAR END       NEAR END/FAR END     |
 |SECT SECT SECT  LINE LINE LINE  LINE   PATH PATH PATH  PATH   |
 |CV   ES   SES    CV   ES   SES AVA/UNA  CV   ES   SES AVA/UNA |
 +--------------------------------------------------------------+
   |    |    |      |    |    |     |      |    |    |     |
   |    |    |      |    |    |     |      |    |    |     |
   V    V    V      V    V    V     |      V    V    V     |
 +-------------+  +-------------+   |    +-------------+   |
 |ONE-SEC DELAY|  |ONE-SEC DELAY|   |    |ONE-SEC DELAY|   |
 | (1 OF 10)   |  | (1 OF 10)   |   |    | (1 OF 10)   |   |
 |CV   ES   SES|  |CV   ES   SES|   |    |CV   ES   SES|   |
 +-------------+  +-------------+   |    +-------------+   |
   |    |    |      |    |    |     |      |    |    |     |
   /    /    /      /    /    /     /      /    /    /     /
   /    /    /      /    /    /     /      /    /    /     /
   |    |    |      |    |    |     |      |    |    |     |
   V    V    V      V    V    V     |      V    V    V     |
 +-------------+  +-------------+   |    +-------------+   |
 |ONE-SEC DELAY|  |ONE-SEC DELAY|   |    |ONE-SEC DELAY|   |
 | (10 OF 10)  |  | (10 OF 10)  |   |    | (10 OF 10)  |   |
 |CV   ES   SES|  |CV   ES   SES|   |    |CV   ES   SES|   |
 +-------------+  +-------------+   |    +-------------+   |
   |    |    |      |    |    |     |      |    |    |     |
   |    |    |      |    |    |     |      |    |    |     |
   V    V    V      V    V    V     V      V    V    V     V
 +--------------------------------------------------------------+
 |              UPDATE STATISTICS COUNTERS                      |
 |                                                              |
 |                   NEAR END/FAR END       NEAR END/FAR END    |
 |   SECTION               LINE                   PATH          |
 | CV ES EFS SES   CV ES EFS SES AS UAS   CV ES EFS SES AS UAS  |
 +--------------------------------------------------------------+
 Note that if such a procedure is adopted there is no current interval
 data for the first ten seconds after a system comes up.

Tesink Standards Track [Page 70] RFC 3592 SONET/SDH Objects September 2003

 noSuchInstance must be returned if a management station attempts to
 access the current interval counters during this time.
 It is an implementation-specific matter whether an agent assumes that
 the initial state of the interface is available or unavailable.

Appendix B - RFC 1595 SES interpretation

 This appendix contains the values for x for the Section, Line, Path,
 and VT Layers as used in [T1M1.3][RFC1595][TR253].
      Value for x for SONET/SDH Section SES Definition
 Rate            x               Minimum Bit Error Rate
 =======================================================
 OC-1             9                      1.5 x 10^-7
 OC-3            16                        1 x 10^-7
 OC-9            47                        1 x 10^-7
 OC-12           63                        1 x 10^-7
 OC-18           94                        1 x 10^-7
 OC-24          125                        1 x 10^-7
 OC-36          187                        1 x 10^-7
 OC-48          249                        1 x 10^-7
      Value for x for SONET/SDH Line SES Definition
 Rate            x               Minimum Bit Error Rate
 =======================================================
 OC-1            12                       2 x 10^-7
 OC-3            32                       2 x 10^-7
 OC-9            47                       2 x 10^-7
 OC-12          124                       2 x 10^-7
 OC-18          186                       2 x 10^-7
 OC-24          248                       2 x 10^-7
 OC-36          370                       2 x 10^-7
 OC-48          494                       2 x 10^-7
      Value for x for SONET/SDH STS-Path SES Definition
 Rate            x               Minimum Bit Error Rate
 =======================================================
 STS-1            9                       1.5 x 10^-7
 STS-3           16                         1 x 10^-7

Tesink Standards Track [Page 71] RFC 3592 SONET/SDH Objects September 2003

      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

Author's Address

 Kaj Tesink
 Telcordia Technologies
 331 Newman Springs Road
 P.O. Box 7020
 Red Bank, NJ  07701-7020
 Phone: (732) 758-5254
 EMail: kaj@research.telcordia.com

Tesink Standards Track [Page 72] RFC 3592 SONET/SDH Objects September 2003

Full Copyright Statement

 Copyright (C) The Internet Society (2003).  All Rights Reserved.
 This document and translations of it may be copied and furnished to
 others, and derivative works that comment on or otherwise explain it
 or assist in its implementation may be prepared, copied, published
 and distributed, in whole or in part, without restriction of any
 kind, provided that the above copyright notice and this paragraph are
 included on all such copies and derivative works.  However, this
 document itself may not be modified in any way, such as by removing
 the copyright notice or references to the Internet Society or other
 Internet organizations, except as needed for the purpose of
 developing Internet standards in which case the procedures for
 copyrights defined in the Internet Standards process must be
 followed, or as required to translate it into languages other than
 English.
 The limited permissions granted above are perpetual and will not be
 revoked by the Internet Society or its successors or assigns.
 This document and the information contained herein is provided on an
 "AS IS" basis and THE INTERNET SOCIETY AND THE INTERNET ENGINEERING
 TASK FORCE DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING
 BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION
 HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF
 MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.

Acknowledgement

 Funding for the RFC Editor function is currently provided by the
 Internet Society.

Tesink Standards Track [Page 73]

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