Telcordia Technologies
September 2003
Definitions of Managed Objects for the
Synchronous Optical Network/Synchronous Digital
Hierarchy (SONET/SDH) Interface Type
Status of this Memo
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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
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Copyright © The Internet Society (2003). All Rights Reserved.
Abstract
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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
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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 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
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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].
2. The Internet-Standard Management Framework
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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
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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
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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.
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].
3.2. Use of ifTable for SONET/SDH Medium/Section/Line Layer
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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.
3.3. Use of ifTable for SONET/SDH Paths
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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.
3.4. Use of ifTable for SONET/SDH VTs/VCs
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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
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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
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
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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.
STS-Path Loss of Pointer
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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
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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
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A Line Alarm Indication Signal (L-AIS) is defined in ANSI T1.105. The following criteria are specific to the L-AIS defect:
- Line AIS defect is detected as a "111" pattern in bits 6, 7, and 8 of the K2 byte in five consecutive frames.
- Line AIS defect is terminated when bits 6, 7, and 8 of the K2 byte do not contain the code "111" for five consecutive frames.
A Line AIS failure is declared when the Line AIS defect persists for a period of 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
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The STS-Path Alarm Indication Signal (AIS) is defined in ANSI T1.105 as all ones in bytes H1, H2, and H3 as well as all ones in the entire STS SPE. The following criteria are specific to the STS-Path AIS defect:
- STS-Path AIS defect is detected as all ones in bytes H1 and H2 in three contiguous frames.
- The STS-Path AIS defect is terminated when a valid STS Pointer is detected with the NDF set to "1001" (inverted) for one frame, or "0110" (normal) for three contiguous frames.
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
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The VT-Path Alarm Indication Signal (AIS) is only applicable for VTs in the floating mode of operation. VT-Path AIS is used to alert the downstream VT Path Terminating Entity (PTE) of an upstream failure. Upon detection of a failure, Line AIS, or STS- Path AIS, an STS PTE will generate downstream VT-Path AIS if the STS Synchronous Payload Envelope (SPE) is carrying floating VTs. VT-Path AIS is specified in ANSI T1.105 as all ones in bytes V1, V2, V3, and V4, as well as all ones in the entire VT SPE. The following criteria are specific to VT-Path AIS defect:
- VT-Path AIS defect is detected by a VT PTE as all ones in bytes V1 and V2 in three contiguous VT superframes.
- VT-Path AIS defect is terminated when valid VT pointer with a valid VT size is detected with the NDF set to "1001" (inverted) for one VT superframe, or "0110" (normal) for three contiguous VT superframes are detected.
A VT-Path AIS failure is declared when the VT-Path AIS defect persists for 2.5 +/- 0.5 seconds. A VT-Path AIS failure is cleared when the VT-Path AIS defect is absent for 10 +/- 0.5 seconds.
Line Remote Defect Indication
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Line Remote Defect Indication (RDI) (aka Line FERF) signal is the occurrence of a "110" pattern in bit positions 6, 7, and 8 of the K2 byte in STS-1 #1 of the STS-N signal. Line RDI is defined in ANSI T1.105. The following criteria are specific to Line RDI defect:
- Line RDI defect is a "110" code in bits 6, 7, and 8 of the K2 byte of in STS-1 #1 in x consecutive frames, where x = 5 [T1.231a][T1.231b] or 10 [T1.231b].-
- 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:-
- 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].
- 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 100milliseconds by the VT PTE upon detection of a VT-Path AIS or LOP defect. Transmission of the VT-Path RDI signal shall cease within 100 milliseconds when the VT PTE no longer detects VT-Path AIS or VT-Path LOP defect. The VT-Path RDI shall accurately report the presence or absence of VT-Path AIS or VT-Path LOP defects. VT- Path RDI defect is defined in ANSI T1.105. The following requirements are specific to VT-Path RDI defect:-
- VT-Path RDI defect is the occurrence of a "1" in bit 4 of the VT-Path Overhead byte (V5) in x consecutive frames, where x = 5 [T1.231a] or 10 [T1.231b].
- 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
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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
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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
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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
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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
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.
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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
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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
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At the Line, Path, and VT layers, an unavailable second is calculated by counting the number of seconds that the interface is unavailable. At each layer, the SONET/SDH interface is said to be unavailable at the onset of 10 contiguous SESs. The 10 SESs are included in unavailable time. Once unavailable, the SONET/SDH interface becomes available at the onset of 10 contiguous seconds with no SESs. The 10 seconds with no SESs are excluded from unavailable time. With respect to the SONET/SDH error counts at each layer, all counters at that layer are incremented while the SONET/SDH interface is deemed available at that layer. While the interface is deemed unavailable at that layer, the only count that is incremented is UASs at that layer.
Note that this definition implies that the agent cannot determine until after a ten second interval has passed whether a given one- second interval belongs to available or unavailable time. If the agent chooses to update the various performance statistics in real time then it must be prepared to retroactively reduce the ES, SES, and SEFS counts by 10 and increase the UAS count by 10 when it determines that available time has been entered. It must also be prepared to reduce the CV count by the number of violations counted since the onset of unavailable time. The agent must be similarly prepared to retroactively decrease the UAS count by 10 and increase the ES and CV counts as necessary upon entering available time. A special case exists when the 10 second period leading to available or unavailable time crosses a 900 second statistics window boundary, as the foregoing description implies that the CV, ES, SES, SEFS, and UAS counts the PREVIOUS interval must be adjusted. In this case successive GETs of the affected sonetPathIntervalSES and sonetPathIntervalUAS objects (and the analogous Line and VT objects also) objects will return differing values if the first GET occurs during the first few seconds of the window.
According to ANSI T1.231 unavailable time begins at the _onset_ of 10 contiguous severely errored seconds -- that is, unavailable time starts with the _first_ of the 10 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
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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
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from the _previous_ update cycle and the one-second CV counts and ES/SES flags shifted out of the 10-element delay line.
This approach is further described in Appendix A. An agent may choose to use this approach in lieu of retroactive adjustments to the counters.
In any case, a linkDown trap shall be sent only after the agent has determined for certain that the unavailable state has been entered, but the time on the trap will be that of the first UAS (i.e., 10 seconds earlier). A linkUp trap shall be handled similarly.
Unequipped
If a Path or VT connection is not provisioned (idle) the SONET equipment will signal this state by transmitting the Path or VT Signal Label as follows: - 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
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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
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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
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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;-- This is the MIB module for the SONET/SDH Interface objects.
sonetMIB MODULE-IDENTITY
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LAST-UPDATED "200308110000Z"
ORGANIZATION "IETF AToM MIB Working Group"CONTACT-INFO
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"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
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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 © 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.-
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(1) Corrected typographical error
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(bellcore1991(2) in sonetSESthresholdSet)
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(2) Added support for sts192cSTM64(6) and
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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
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(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
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changes to the MIB.
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(2) Where applicable, the textual conventions
PerfCurrentCount and PerfIntervalCount from
PerfHist-TC-MIB have been used in place of Gauge32.
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(3) An agent now has the option to delay updates to
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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
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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
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been updated to describe its behaviour if the duration of the current interval exceeds the maximum value.
(6) The DESCRIPTION clause for sonetMediumValidIntervals
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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
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to enable or disable loopback configurations.
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(8) Because the error count thresholds for declaring
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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.
(9) A column with SYNTAX TruthValue has been added to each
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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:
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sonetSectionIntervalValidData sonetLineIntervalValidData sonetFarEndLineIntervalValidData sonetPathIntervalValidData sonetFarEndPathIntervalValidData sonetVTIntervalValidData sonetFarEndVTIntervalValidData
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(10) The ranges for sonetPathCurrentStatus and
sonetVTCurrentStatus have been made consistent
with the DESCRIPTION clauses.
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(11) The conformance information has been updated. Previous
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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."
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REVISION "199401030000Z" DESCRIPTION "The RFC 1595 version of this MIB module." ::= { transmission 39 }-- This is the MIB module for the SONET/SDH objects
sonetObjects OBJECT IDENTIFIER ::= { sonetMIB 1 } sonetObjectsPath OBJECT IDENTIFIER ::= { sonetMIB 2 } sonetObjectsVT OBJECT IDENTIFIER ::= { sonetMIB 3 } -- groups in the SONET/SDH MIB module sonetMedium OBJECT IDENTIFIER ::= { sonetObjects 1 } sonetSection OBJECT IDENTIFIER ::= { sonetObjects 2 } sonetLine OBJECT IDENTIFIER ::= { sonetObjects 3 } sonetFarEndLine OBJECT IDENTIFIER ::= { sonetObjects 4 } sonetPath OBJECT IDENTIFIER ::= { sonetObjectsPath 1 } sonetFarEndPath OBJECT IDENTIFIER ::= { sonetObjectsPath 2 } sonetVT OBJECT IDENTIFIER ::= { sonetObjectsVT 1 } sonetFarEndVT OBJECT IDENTIFIER ::= { sonetObjectsVT 2 } -- the SONET/SDH Medium group-- SONET/SDH interfaces for some applications may be electrical -- interfaces and not optical interfaces. This group handles -- the configuration information for both optical SONET/SDH -- interfaces and electrical SONET/SDH interfaces.
sonetMediumTable OBJECT-TYPE
SYNTAX SEQUENCE OF SonetMediumEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "The SONET/SDH Medium table." ::= { sonetMedium 1 }sonetMediumEntry OBJECT-TYPE
SYNTAX SonetMediumEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "An entry in the SONET/SDH Medium table." INDEX { ifIndex } ::= { sonetMediumTable 1 }SonetMediumEntry ::=
SEQUENCE { sonetMediumType INTEGER, sonetMediumTimeElapsed Integer32, sonetMediumValidIntervals Integer32, sonetMediumLineCoding INTEGER, sonetMediumLineType INTEGER, sonetMediumCircuitIdentifier DisplayString, sonetMediumInvalidIntervals Integer32, sonetMediumLoopbackConfig BITS }sonetMediumType OBJECT-TYPE
SYNTAX INTEGER { sonet(1), sdh(2) } 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), 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 }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:-
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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
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Loopbacks that are not defined here."
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::= { sonetMediumEntry 8 } sonetSESthresholdSet OBJECT-TYPE SYNTAX INTEGER { other(1), bellcore1991(2), 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.-
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other(1)
None of the following.
bellcore1991(2)
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Bellcore TR-NWT-000253, 1991 [TR253], or ANSI T1M1.3/93-005R2, 1993 [T1M1.3]. See also Appendix B.-
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ansi1993(3)
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ANSI T1.231, 1993 [T1.231a], or Bellcore GR-253-CORE, Issue 2, 1995 [GR253]-
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itu1995(4)
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ITU Recommendation G.826, 1995 [G.826]
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ansi1997(5)
ANSI T1.231, 1997 [T1.231b]
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If a manager changes the value of this object then the SES statistics collected prior to this change must be invalidated." ::= { sonetMedium 2 } -- the SONET/SDH Section group -- this group consists of 2 tables: -- - the SONET/SDH Section Current Table -- - the SONET/SDH Section Interval Table -- the SONET/SDH Section Current Table-- The SONET/SDH Section
-- current table contains various statistics
-- being collected for the current 15 minute interval.sonetSectionCurrentTable OBJECT-TYPE
SYNTAX SEQUENCE OF SonetSectionCurrentEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "The SONET/SDH Section Current table." ::= { sonetSection 1 }sonetSectionCurrentEntry OBJECT-TYPE
SYNTAX SonetSectionCurrentEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "An entry in the SONET/SDH Section Current table." INDEX { ifIndex } ::= { sonetSectionCurrentTable 1 }SonetSectionCurrentEntry ::=
SEQUENCE { sonetSectionCurrentStatus Integer32, sonetSectionCurrentESs PerfCurrentCount, sonetSectionCurrentSESs PerfCurrentCount, sonetSectionCurrentSEFSs PerfCurrentCount, sonetSectionCurrentCVs PerfCurrentCount }sonetSectionCurrentStatus OBJECT-TYPE
SYNTAX Integer32 (1..6) MAX-ACCESS read-only STATUS current DESCRIPTION "This variable indicates the status of the interface. The sonetSectionCurrentStatus is a bit map represented as a sum, therefore, it can represent multiple defects simultaneously. The sonetSectionNoDefect should be set if and only if no other flag is set. The various bit positions are: 1 sonetSectionNoDefect 2 sonetSectionLOS 4 sonetSectionLOF" ::= { sonetSectionCurrentEntry 1 }sonetSectionCurrentESs OBJECT-TYPE
SYNTAX PerfCurrentCount MAX-ACCESS read-only STATUS current DESCRIPTION "The counter associated with the number of Errored Seconds encountered by a SONET/SDH Section in the current 15 minute interval." ::= { sonetSectionCurrentEntry 2 }sonetSectionCurrentSESs OBJECT-TYPE
SYNTAX PerfCurrentCount MAX-ACCESS read-only STATUS current DESCRIPTION "The counter associated with the number of Severely Errored Seconds encountered by a SONET/SDH Section in the current 15 minute interval." ::= { sonetSectionCurrentEntry 3 }sonetSectionCurrentSEFSs OBJECT-TYPE
SYNTAX PerfCurrentCount MAX-ACCESS read-only STATUS current DESCRIPTION "The counter associated with the number of 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 } -- the SONET/SDH Section Interval Table-- The SONET/SDH Section Interval Table
-- contains various statistics
-- collected by each system over a maximum
-- of the previous 24 hours of-- operation. The past 24 hours may be broken into 96 -- completed 15 minute intervals.
-- A system is required to store at
-- least 4 completed 15 minute interval.
-- The default value is 32 intervals.sonetSectionIntervalTable OBJECT-TYPE
SYNTAX SEQUENCE OF SonetSectionIntervalEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "The SONET/SDH Section Interval table." ::= { sonetSection 2 }sonetSectionIntervalEntry OBJECT-TYPE
SYNTAX SonetSectionIntervalEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "An entry in the SONET/SDH Section Interval table." INDEX { ifIndex, sonetSectionIntervalNumber } ::= { sonetSectionIntervalTable 1 }SonetSectionIntervalEntry ::=
SEQUENCE { sonetSectionIntervalNumber Integer32, sonetSectionIntervalESs PerfIntervalCount, sonetSectionIntervalSESs PerfIntervalCount, sonetSectionIntervalSEFSs PerfIntervalCount, sonetSectionIntervalCVs PerfIntervalCount, sonetSectionIntervalValidData TruthValue }sonetSectionIntervalNumber OBJECT-TYPE
SYNTAX Integer32 (1..96) MAX-ACCESS not-accessible STATUS current DESCRIPTION "A number between 1 and 96, which identifies the interval for which the set of statistics is available. The interval identified by 1 is the most recently completed 15 minute interval, and the interval identified by N is the interval immediately preceding the one identified by N-1." ::= { sonetSectionIntervalEntry 1 }sonetSectionIntervalESs OBJECT-TYPE
SYNTAX PerfIntervalCount MAX-ACCESS read-only STATUS current DESCRIPTION "The counter associated with the number of Errored Seconds encountered by a SONET/SDH Section in a particular 15-minute interval in the past 24 hours." ::= { sonetSectionIntervalEntry 2 }sonetSectionIntervalSESs OBJECT-TYPE
SYNTAX PerfIntervalCount MAX-ACCESS read-only STATUS current DESCRIPTION "The counter associated with the number of Severely Errored Seconds encountered by a SONET/SDH Section in a particular 15-minute interval in the past 24 hours." ::= { sonetSectionIntervalEntry 3 }sonetSectionIntervalSEFSs OBJECT-TYPE
SYNTAX PerfIntervalCount MAX-ACCESS read-only STATUS current DESCRIPTION "The counter associated with the number of Severely Errored Framing Seconds encountered by a SONET/SDH Section in a particular 15-minute interval in the past 24 hours." ::= { sonetSectionIntervalEntry 4 }sonetSectionIntervalCVs OBJECT-TYPE
SYNTAX PerfIntervalCount MAX-ACCESS read-only STATUS current DESCRIPTION "The counter associated with the number of Coding Violations encountered by a SONET/SDH Section in a particular 15-minute interval in the past 24 hours." ::= { sonetSectionIntervalEntry 5 }sonetSectionIntervalValidData OBJECT-TYPE
SYNTAX TruthValue MAX-ACCESS read-only STATUS current DESCRIPTION "This variable indicates if the data for this interval is valid." ::= { sonetSectionIntervalEntry 6 } -- the SONET/SDH Line group -- this group consists of 2 tables: -- - the SONET/SDH Line Current Table -- - the SONET/SDH Line Interval Table -- the SONET/SDH Line Current Table-- The SONET/SDH Line
-- current table contains various statistics
-- being collected for the current 15 minute interval.sonetLineCurrentTable OBJECT-TYPE
SYNTAX SEQUENCE OF SonetLineCurrentEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "The SONET/SDH Line Current table." ::= { sonetLine 1 }sonetLineCurrentEntry OBJECT-TYPE
SYNTAX SonetLineCurrentEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "An entry in the SONET/SDH Line Current table." INDEX { ifIndex } ::= { sonetLineCurrentTable 1 }SonetLineCurrentEntry ::=
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SEQUENCE {
sonetLineCurrentStatus Integer32, sonetLineCurrentESs PerfCurrentCount, sonetLineCurrentSESs PerfCurrentCount, sonetLineCurrentCVs PerfCurrentCount, sonetLineCurrentUASs PerfCurrentCount }sonetLineCurrentStatus OBJECT-TYPE
SYNTAX Integer32 (1..6) MAX-ACCESS read-only STATUS current DESCRIPTION "This variable indicates the status of the interface. The sonetLineCurrentStatus is a bit map represented as a sum, therefore, it can represent multiple defects simultaneously. The sonetLineNoDefect should be set if and only if no other flag is set. The various bit positions are: 1 sonetLineNoDefect 2 sonetLineAIS 4 sonetLineRDI" ::= { sonetLineCurrentEntry 1 }sonetLineCurrentESs OBJECT-TYPE
SYNTAX PerfCurrentCount MAX-ACCESS read-only STATUS current DESCRIPTION "The counter associated with the number of Errored Seconds encountered by a SONET/SDH Line in the current 15 minute interval." ::= { sonetLineCurrentEntry 2 }sonetLineCurrentSESs OBJECT-TYPE
SYNTAX PerfCurrentCount MAX-ACCESS read-only STATUS current DESCRIPTION "The counter associated with the number of Severely Errored Seconds encountered by a SONET/SDH Line in the current 15 minute interval." ::= { sonetLineCurrentEntry 3 }sonetLineCurrentCVs OBJECT-TYPE
SYNTAX PerfCurrentCount MAX-ACCESS read-only STATUS current DESCRIPTION "The counter associated with the number of Coding 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 } -- the SONET/SDH Line Interval Table-- The SONET/SDH Line Interval Table
-- contains various statistics
-- collected by each system over a maximum
-- of the previous 24 hours of
-- operation. The past 24 hours may be broken into 96 -- completed 15 minute intervals.
-- A system is required to store at
-- least 4 completed 15 minute interval.
-- The default value is 32 intervals.sonetLineIntervalTable OBJECT-TYPE
SYNTAX SEQUENCE OF SonetLineIntervalEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "The SONET/SDH Line Interval table." ::= { sonetLine 2 }sonetLineIntervalEntry OBJECT-TYPE
SYNTAX SonetLineIntervalEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "An entry in the SONET/SDH Line Interval table." INDEX { ifIndex, sonetLineIntervalNumber } ::= { sonetLineIntervalTable 1 }SonetLineIntervalEntry ::=
SEQUENCE { sonetLineIntervalNumber Integer32, sonetLineIntervalESs PerfIntervalCount, sonetLineIntervalSESs PerfIntervalCount, sonetLineIntervalCVs PerfIntervalCount, sonetLineIntervalUASs PerfIntervalCount, sonetLineIntervalValidData TruthValue }sonetLineIntervalNumber OBJECT-TYPE
SYNTAX Integer32 (1..96) MAX-ACCESS not-accessible STATUS current DESCRIPTION "A number between 1 and 96, which identifies the interval for which the set of statistics is available. The interval identified by 1 is the most recently completed 15 minute interval, and the interval identified by N is the interval immediately preceding the one identified by N-1." ::= { sonetLineIntervalEntry 1 }sonetLineIntervalESs OBJECT-TYPE
SYNTAX PerfIntervalCount MAX-ACCESS read-only STATUS current DESCRIPTION "The counter associated with the number of Errored Seconds encountered by a SONET/SDH Line in a particular 15-minute interval in the past 24 hours." ::= { sonetLineIntervalEntry 2 }sonetLineIntervalSESs OBJECT-TYPE
SYNTAX PerfIntervalCount MAX-ACCESS read-only STATUS current DESCRIPTION "The counter associated with the number of Severely Errored Seconds encountered by a SONET/SDH Line in a particular 15-minute interval in the past 24 hours." ::= { sonetLineIntervalEntry 3 }sonetLineIntervalCVs OBJECT-TYPE
SYNTAX PerfIntervalCount MAX-ACCESS read-only STATUS current DESCRIPTION "The counter associated with the number of Coding Violations encountered by a SONET/SDH Line in a particular 15-minute interval in the past 24 hours." ::= { 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 }-- The SONET/SDH Far End Line group.
-- This group may only be implemented by SONET/SDH (LTEs) -- systems that provide for a far end block error (FEBE) -- information at the SONET/SDH Line Layer.-- This group consists of two tables: -- SONET/SDH Far End Line Current Table -- SONET/SDH Far End Line Interval Table
-- The SONET/SDH Far End Line Current Table
-- The SONET/SDH Far End Line Current table contains
-- various statistics being
-- collected for the current 15 minute interval.
-- The statistics are collected from the far end-- block error code (FEBE)
-- within the third Z2 byte of the Line Overhead
-- in Broadband ISDN applications.
-- The definitions are the same as described for
-- the near-end information.sonetFarEndLineCurrentTable OBJECT-TYPE
SYNTAX SEQUENCE OF SonetFarEndLineCurrentEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "The SONET/SDH Far End Line Current table." ::= { sonetFarEndLine 1 }sonetFarEndLineCurrentEntry OBJECT-TYPE
SYNTAX SonetFarEndLineCurrentEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "An entry in the SONET/SDH Far End Line Current table." INDEX { ifIndex } ::= { sonetFarEndLineCurrentTable 1 }SonetFarEndLineCurrentEntry ::=
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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 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 }-- The SONET/SDH Far End Line Interval Table
-- The SONET/SDH Far End Line Interval Table
-- contains various statistics
-- collected by each system over a maximum
-- of the previous 24 hours of
-- operation. The past 24 hours may be broken into 96 -- completed 15 minute intervals.
-- A system is required to store at
-- least 4 completed 15 minute interval.
-- The default value is 32 intervals.sonetFarEndLineIntervalTable OBJECT-TYPE
SYNTAX SEQUENCE OF SonetFarEndLineIntervalEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "The SONET/SDH Far End Line Interval table." ::= { sonetFarEndLine 2 }sonetFarEndLineIntervalEntry OBJECT-TYPE
SYNTAX SonetFarEndLineIntervalEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "An entry in the SONET/SDH Far End Line Interval table." INDEX { ifIndex, sonetFarEndLineIntervalNumber } ::= { sonetFarEndLineIntervalTable 1 }SonetFarEndLineIntervalEntry ::=
SEQUENCE { sonetFarEndLineIntervalNumber Integer32, sonetFarEndLineIntervalESs PerfIntervalCount, sonetFarEndLineIntervalSESs PerfIntervalCount, sonetFarEndLineIntervalCVs PerfIntervalCount, sonetFarEndLineIntervalUASs PerfIntervalCount, sonetFarEndLineIntervalValidData TruthValue }sonetFarEndLineIntervalNumber OBJECT-TYPE
SYNTAX Integer32 (1..96) MAX-ACCESS not-accessible STATUS current DESCRIPTION "A number between 1 and 96, which identifies the interval for which the set of statistics is available. The interval identified by 1 is the most recently completed 15 minute interval, and the interval identified by N is the interval immediately preceding the one identified by N-1." ::= { sonetFarEndLineIntervalEntry 1 }sonetFarEndLineIntervalESs OBJECT-TYPE
SYNTAX PerfIntervalCount MAX-ACCESS read-only STATUS current DESCRIPTION "The counter associated with the number of Far End Errored Seconds encountered by a SONET/SDH Line interface in a particular 15-minute interval in the past 24 hours." ::= { sonetFarEndLineIntervalEntry 2 }sonetFarEndLineIntervalSESs OBJECT-TYPE
SYNTAX PerfIntervalCount MAX-ACCESS read-only STATUS current DESCRIPTION "The counter associated with the number of Far End Severely Errored Seconds encountered by a SONET/SDH Line interface in a particular 15-minute interval in the past 24 hours." ::= { sonetFarEndLineIntervalEntry 3 }sonetFarEndLineIntervalCVs OBJECT-TYPE
SYNTAX PerfIntervalCount MAX-ACCESS read-only STATUS current DESCRIPTION "The counter associated with the number of Far End Coding Violations reported via the far end block error count encountered by a 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." ::= { sonetFarEndLineIntervalEntry 6 } -- the SONET/SDH Path group -- this group consists of 2 tables: -- - the SONET/SDH Path Current Table -- - the SONET/SDH Path Interval Table -- the SONET/SDH Path Current Table-- The SONET/SDH Path
-- current table contains various statistics
-- being collected for the current 15 minute interval.sonetPathCurrentTable OBJECT-TYPE SYNTAX SEQUENCE OF SonetPathCurrentEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "The SONET/SDH Path Current table." ::= { sonetPath 1 } sonetPathCurrentEntry OBJECT-TYPE SYNTAX SonetPathCurrentEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "An entry in the SONET/SDH Path Current table." INDEX { ifIndex } ::= { sonetPathCurrentTable 1 }SonetPathCurrentEntry ::=
SEQUENCE { sonetPathCurrentWidth INTEGER, sonetPathCurrentStatus Integer32, sonetPathCurrentESs PerfCurrentCount, sonetPathCurrentSESs PerfCurrentCount, sonetPathCurrentCVs PerfCurrentCount, sonetPathCurrentUASs PerfCurrentCount }sonetPathCurrentWidth OBJECT-TYPE
SYNTAX INTEGER { sts1(1), sts3cSTM1(2), sts12cSTM4(3), sts24c(4), sts48cSTM16(5), 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 } 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 } -- the SONET/SDH Path Interval Table-- The SONET/SDH Path Interval Table
-- contains various statistics
-- collected by each system over a maximum
-- of the previous 24 hours of
-- operation. The past 24 hours may be broken into 96 -- completed 15 minute intervals.
-- A system is required to store at
-- least 4 completed 15 minute interval.
-- The default value is 32 intervals.sonetPathIntervalTable OBJECT-TYPE SYNTAX SEQUENCE OF SonetPathIntervalEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "The SONET/SDH Path Interval table." ::= { sonetPath 2 } sonetPathIntervalEntry OBJECT-TYPE SYNTAX SonetPathIntervalEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "An entry in the SONET/SDH Path Interval table." INDEX { ifIndex, sonetPathIntervalNumber } ::= { sonetPathIntervalTable 1 }SonetPathIntervalEntry ::=
SEQUENCE { sonetPathIntervalNumber Integer32, sonetPathIntervalESs PerfIntervalCount, sonetPathIntervalSESs PerfIntervalCount, sonetPathIntervalCVs PerfIntervalCount, sonetPathIntervalUASs PerfIntervalCount, sonetPathIntervalValidData TruthValue } sonetPathIntervalNumber OBJECT-TYPE SYNTAX Integer32 (1..96) MAX-ACCESS not-accessible STATUS current DESCRIPTION "A number between 1 and 96, which identifies the interval for which the set of statistics is available. The interval identified by 1 is the most recently completed 15 minute interval, and the interval identified by N is the interval immediately preceding the one identified by N-1." ::= { sonetPathIntervalEntry 1 }sonetPathIntervalESs OBJECT-TYPE
SYNTAX PerfIntervalCount MAX-ACCESS read-only STATUS current DESCRIPTION "The counter associated with the number of Errored Seconds encountered by a SONET/SDH Path in a particular 15-minute interval in the past 24 hours." ::= { sonetPathIntervalEntry 2 } sonetPathIntervalSESs OBJECT-TYPE SYNTAX PerfIntervalCount MAX-ACCESS read-only STATUS current DESCRIPTION "The counter associated with the number of Severely Errored Seconds encountered by a SONET/SDH Path in a particular 15-minute interval in the past 24 hours." ::= { sonetPathIntervalEntry 3 } sonetPathIntervalCVs OBJECT-TYPE SYNTAX PerfIntervalCount MAX-ACCESS read-only STATUS current DESCRIPTION "The counter associated with the number of Coding Violations encountered by a SONET/SDH Path in a particular 15-minute interval in the past 24 hours." ::= { 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 interval is valid." ::= { sonetPathIntervalEntry 6 } -- The SONET/SDH Far End Path group -- This group consists of two tables: -- - SONET/SDH Far End Path Current Table -- - SONET/SDH Far End Path Interval Table-- The SONET/SDH Far End Path Current Table
-- The SONET/SDH Far End Path Current table
-- contains various statistics
-- being collected for the current 15 minute interval.
-- The statistics are collected from
-- the far end block error code
-- (FEBE) within the G1 byte of the Path Overhead.
-- The definitions are the same as described for
-- the near-end information.sonetFarEndPathCurrentTable OBJECT-TYPE
SYNTAX SEQUENCE OF SonetFarEndPathCurrentEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "The SONET/SDH Far End Path Current table." ::= { sonetFarEndPath 1 }sonetFarEndPathCurrentEntry OBJECT-TYPE
SYNTAX SonetFarEndPathCurrentEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "An entry in the SONET/SDH Far End Path Current table." INDEX { ifIndex } ::= { sonetFarEndPathCurrentTable 1 }SonetFarEndPathCurrentEntry ::=
SEQUENCE { sonetFarEndPathCurrentESs PerfCurrentCount, sonetFarEndPathCurrentSESs PerfCurrentCount, sonetFarEndPathCurrentCVs PerfCurrentCount, sonetFarEndPathCurrentUASs PerfCurrentCount }sonetFarEndPathCurrentESs OBJECT-TYPE
SYNTAX PerfCurrentCount 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 }-- The SONET/SDH Far End Path Interval Table
-- The SONET/SDH Far End Path Interval Table
-- contains various statistics
-- collected by each system over a maximum
-- of the previous 24 hours of
-- operation. The past 24 hours may be broken into 96 -- completed 15 minute intervals.
-- A system is required to store at
-- least 4 completed 15 minute interval.
-- The default value is 32 intervals.sonetFarEndPathIntervalTable OBJECT-TYPE
SYNTAX SEQUENCE OF SonetFarEndPathIntervalEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "The SONET/SDH Far End Path Interval table." ::= { sonetFarEndPath 2 }sonetFarEndPathIntervalEntry OBJECT-TYPE
SYNTAX SonetFarEndPathIntervalEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "An entry in the SONET/SDH Far End Path Interval table." INDEX { ifIndex, sonetFarEndPathIntervalNumber } ::= { sonetFarEndPathIntervalTable 1 }SonetFarEndPathIntervalEntry ::=
SEQUENCE { sonetFarEndPathIntervalNumber Integer32, sonetFarEndPathIntervalESs PerfIntervalCount, sonetFarEndPathIntervalSESs PerfIntervalCount, sonetFarEndPathIntervalCVs PerfIntervalCount, sonetFarEndPathIntervalUASs PerfIntervalCount, sonetFarEndPathIntervalValidData TruthValue }sonetFarEndPathIntervalNumber OBJECT-TYPE
SYNTAX Integer32 (1..96) MAX-ACCESS not-accessible STATUS current DESCRIPTION "A number between 1 and 96, which identifies the interval for which the set of statistics is available. The interval identified by 1 is the most recently completed 15 minute interval, and the interval identified by N is the interval immediately preceding the one identified by N-1." ::= { sonetFarEndPathIntervalEntry 1 }sonetFarEndPathIntervalESs OBJECT-TYPE
SYNTAX PerfIntervalCount MAX-ACCESS read-only STATUS current DESCRIPTION "The counter associated with the number of Far End Errored Seconds encountered by a SONET/SDH Path interface in a particular 15-minute interval in the past 24 hours." ::= { sonetFarEndPathIntervalEntry 2 }sonetFarEndPathIntervalSESs OBJECT-TYPE
SYNTAX PerfIntervalCount MAX-ACCESS read-only STATUS current DESCRIPTION "The counter associated with the number of Far End Severely Errored Seconds encountered by a SONET/SDH Path interface in a particular 15-minute interval in the past 24 hours." ::= { sonetFarEndPathIntervalEntry 3 }sonetFarEndPathIntervalCVs OBJECT-TYPE
SYNTAX PerfIntervalCount MAX-ACCESS read-only STATUS current DESCRIPTION "The counter associated with the number of Far End Coding Violations reported via the far end block error count encountered by a SONET/SDH Path interface in a particular 15-minute interval in the past 24 hours." ::= { sonetFarEndPathIntervalEntry 4 }sonetFarEndPathIntervalUASs OBJECT-TYPE
SYNTAX PerfIntervalCount MAX-ACCESS read-only STATUS current DESCRIPTION "The counter associated with the number of Far End Unavailable Seconds encountered by a SONET/SDH Path interface in a particular 15-minute interval in the past 24 hours." ::= { sonetFarEndPathIntervalEntry 5 }sonetFarEndPathIntervalValidData OBJECT-TYPE
SYNTAX TruthValue MAX-ACCESS read-only STATUS current DESCRIPTION "This variable indicates if the data for this interval is valid." ::= { sonetFarEndPathIntervalEntry 6 } -- the SONET/SDH Virtual Tributary group -- this group consists of 2 tables: -- - the SONET/SDH VT Current Table -- - the SONET/SDH VT Interval Table-- Corresponding SDH signals for SONET VTs are
-- as follows:-- A VT1.5 = TU11 -- A VT2 = TU12 -- A VT3 = none -- none = TU3 -- A VT6 = TU2 -- the SONET/SDH VT Current Table
-- The SONET/SDH VT current table
-- contains various statistics
-- being collected for the
-- current 15 minute interval.sonetVTCurrentTable OBJECT-TYPE SYNTAX SEQUENCE OF SonetVTCurrentEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "The SONET/SDH VT Current table." ::= { sonetVT 1 } sonetVTCurrentEntry OBJECT-TYPE SYNTAX SonetVTCurrentEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "An entry in the SONET/SDH VT Current table." INDEX { ifIndex } ::= { sonetVTCurrentTable 1 }SonetVTCurrentEntry ::=
SEQUENCE { sonetVTCurrentWidth INTEGER, sonetVTCurrentStatus Integer32, sonetVTCurrentESs PerfCurrentCount, sonetVTCurrentSESs PerfCurrentCount, sonetVTCurrentCVs PerfCurrentCount, sonetVTCurrentUASs PerfCurrentCount } sonetVTCurrentWidth OBJECT-TYPE SYNTAX INTEGER { vtWidth15VC11(1), vtWidth2VC12(2), vtWidth3(3), vtWidth6VC2(4), vtWidth6c(5) } MAX-ACCESS read-write STATUS current DESCRIPTION "A value that indicates the type of the SONET VT and SDH VC. Assigned widths are VT1.5/VC11, VT2/VC12, VT3, VT6/VC2, and VT6c." ::= { sonetVTCurrentEntry 1 }sonetVTCurrentStatus OBJECT-TYPE
SYNTAX Integer32 (1..126) MAX-ACCESS read-only STATUS current DESCRIPTION "This variable indicates the status of the interface. The sonetVTCurrentStatus is a bit map represented as a sum, therefore, it can represent multiple defects and failures simultaneously. The sonetVTNoDefect should be set if and only if no other flag is set. The various bit positions are: 1 sonetVTNoDefect 2 sonetVTLOP 4 sonetVTPathAIS 8 sonetVTPathRDI 16 sonetVTPathRFI 32 sonetVTUnequipped 64 sonetVTSignalLabelMismatch" ::= { sonetVTCurrentEntry 2 } sonetVTCurrentESs OBJECT-TYPE SYNTAX PerfCurrentCount MAX-ACCESS read-only STATUS current DESCRIPTION "The counter associated with the number of Errored Seconds encountered by a SONET/SDH VT in the current 15 minute interval." ::= { sonetVTCurrentEntry 3 } sonetVTCurrentSESs OBJECT-TYPE SYNTAX PerfCurrentCount MAX-ACCESS read-only STATUS current DESCRIPTION "The counter associated with the number of Severely Errored Seconds encountered by a SONET/SDH VT in the current 15 minute interval." ::= { sonetVTCurrentEntry 4 } sonetVTCurrentCVs OBJECT-TYPE SYNTAX PerfCurrentCount MAX-ACCESS read-only STATUS current DESCRIPTION "The counter associated with the number of Coding Violations encountered by a SONET/SDH VT in the current 15 minute interval." ::= { sonetVTCurrentEntry 5 } sonetVTCurrentUASs OBJECT-TYPE SYNTAX PerfCurrentCount MAX-ACCESS read-only STATUS current DESCRIPTION "The counter associated with the number of Unavailable Seconds encountered by a VT in the current 15 minute interval." ::= { sonetVTCurrentEntry 6 } -- the SONET/SDH VT Interval Table-- The SONET/SDH VT Interval Table
-- contains various statistics
-- collected by each system over a maximum
-- of the previous 24 hours of
-- operation. The past 24 hours may be broken into 96 -- completed 15 minute intervals.
-- A system is required to store at
-- least 4 completed 15 minute interval.
-- The default value is 32 intervals.sonetVTIntervalTable OBJECT-TYPE SYNTAX SEQUENCE OF SonetVTIntervalEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "The SONET/SDH VT Interval table." ::= { sonetVT 2 }sonetVTIntervalEntry OBJECT-TYPE
SYNTAX SonetVTIntervalEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "An entry in the SONET/SDH VT Interval table." INDEX { ifIndex, sonetVTIntervalNumber } ::= { sonetVTIntervalTable 1 }SonetVTIntervalEntry ::=
SEQUENCE { sonetVTIntervalNumber Integer32, sonetVTIntervalESs PerfIntervalCount, sonetVTIntervalSESs PerfIntervalCount, sonetVTIntervalCVs PerfIntervalCount, sonetVTIntervalUASs PerfIntervalCount, sonetVTIntervalValidData TruthValue } sonetVTIntervalNumber OBJECT-TYPE SYNTAX Integer32 (1..96) MAX-ACCESS not-accessible STATUS current DESCRIPTION "A number between 1 and 96, which identifies the interval for which the set of statistics is available. The interval identified by 1 is the most recently completed 15 minute interval, and the interval identified by N is the interval immediately preceding the one identified by N-1." ::= { sonetVTIntervalEntry 1 } sonetVTIntervalESs OBJECT-TYPE SYNTAX PerfIntervalCount MAX-ACCESS read-only STATUS current DESCRIPTION "The counter associated with the number of Errored Seconds encountered by a SONET/SDH VT in a particular 15-minute interval in the past 24 hours." ::= { sonetVTIntervalEntry 2 }sonetVTIntervalSESs OBJECT-TYPE
SYNTAX PerfIntervalCount MAX-ACCESS read-only STATUS current DESCRIPTION "The counter associated with the number of Severely Errored Seconds encountered by a SONET/SDH VT in a particular 15-minute interval in the past 24 hours." ::= { sonetVTIntervalEntry 3 } sonetVTIntervalCVs OBJECT-TYPE SYNTAX PerfIntervalCount MAX-ACCESS read-only STATUS current DESCRIPTION "The counter associated with the number of Coding Violations encountered by a SONET/SDH VT in a particular 15-minute interval in the past 24 hours." ::= { sonetVTIntervalEntry 4 } sonetVTIntervalUASs OBJECT-TYPE 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 } -- The SONET/SDH Far End VT group -- This group consists of two tables: -- SONET/SDH Far End VT Current Table -- SONET/SDH Far End VT Interval Table -- The SONET/SDH Far End VT Current-- The SONET/SDH Far End VT Current table
-- contains various statistics
-- being collected for the current 15 minute interval.
-- The statistics are collected from
-- the far end block error code
-- (FEBE) within the G1 byte of the VT Overhead.-- The definitions are the same as described for
-- the near-end information.sonetFarEndVTCurrentTable OBJECT-TYPE
SYNTAX SEQUENCE OF SonetFarEndVTCurrentEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "The SONET/SDH Far End VT Current table." ::= { sonetFarEndVT 1 }sonetFarEndVTCurrentEntry OBJECT-TYPE
SYNTAX SonetFarEndVTCurrentEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "An entry in the SONET/SDH Far End VT Current table." INDEX { ifIndex } ::= { sonetFarEndVTCurrentTable 1 }SonetFarEndVTCurrentEntry ::=
SEQUENCE { sonetFarEndVTCurrentESs PerfCurrentCount, sonetFarEndVTCurrentSESs PerfCurrentCount, sonetFarEndVTCurrentCVs PerfCurrentCount, sonetFarEndVTCurrentUASs PerfCurrentCount } sonetFarEndVTCurrentESs OBJECT-TYPE SYNTAX PerfCurrentCount MAX-ACCESS read-only STATUS current DESCRIPTION "The counter associated with the number of Far End Errored Seconds encountered by a SONET/SDH interface in the current 15 minute interval." ::= { sonetFarEndVTCurrentEntry 1 }sonetFarEndVTCurrentSESs OBJECT-TYPE
SYNTAX PerfCurrentCount MAX-ACCESS read-only STATUS current DESCRIPTION "The counter associated with the number of Far End Severely Errored Seconds encountered by a SONET/SDH VT interface in the current 15 minute interval." ::= { sonetFarEndVTCurrentEntry 2 }sonetFarEndVTCurrentCVs OBJECT-TYPE
SYNTAX PerfCurrentCount MAX-ACCESS read-only STATUS current DESCRIPTION "The counter associated with the number of Far End Coding Violations reported via the far end block error count encountered by a SONET/SDH VT interface in the current 15 minute interval." ::= { sonetFarEndVTCurrentEntry 3 }sonetFarEndVTCurrentUASs OBJECT-TYPE
SYNTAX PerfCurrentCount MAX-ACCESS read-only STATUS current DESCRIPTION "The counter associated with the number of Far End Unavailable Seconds encountered by a SONET/SDH VT interface in the current 15 minute interval." ::= { sonetFarEndVTCurrentEntry 4 }-- The SONET/SDH Far End VT Interval Table
-- The SONET/SDH Far End VT Interval Table
-- contains various statistics
-- collected by each system over a maximum
-- of the previous 24 hours of
-- operation. The past 24 hours may be broken into 96 -- completed 15 minute intervals.
-- A system is required to store at
-- least 4 completed 15 minute interval.
-- The default value is 32 intervals.sonetFarEndVTIntervalTable OBJECT-TYPE
SYNTAX SEQUENCE OF SonetFarEndVTIntervalEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "The SONET/SDH Far End VT Interval table." ::= { sonetFarEndVT 2 }sonetFarEndVTIntervalEntry OBJECT-TYPE
SYNTAX SonetFarEndVTIntervalEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "An entry in the SONET/SDH Far End VT Interval table." INDEX { ifIndex, sonetFarEndVTIntervalNumber } ::= { sonetFarEndVTIntervalTable 1 }SonetFarEndVTIntervalEntry ::=
-
SEQUENCE {
sonetFarEndVTIntervalNumber Integer32, sonetFarEndVTIntervalESs PerfIntervalCount, sonetFarEndVTIntervalSESs PerfIntervalCount, sonetFarEndVTIntervalCVs PerfIntervalCount, sonetFarEndVTIntervalUASs PerfIntervalCount, sonetFarEndVTIntervalValidData TruthValue }sonetFarEndVTIntervalNumber OBJECT-TYPE
SYNTAX Integer32 (1..96) MAX-ACCESS not-accessible STATUS current DESCRIPTION "A number between 1 and 96, which identifies the interval for which the set of statistics is available. The interval identified by 1 is the most recently completed 15 minute interval, and the interval identified by N is the interval immediately preceding the one identified by N-1." ::= { sonetFarEndVTIntervalEntry 1 }sonetFarEndVTIntervalESs OBJECT-TYPE
SYNTAX PerfIntervalCount MAX-ACCESS read-only STATUS current DESCRIPTION "The counter associated with the number of Far End Errored Seconds encountered by a SONET/SDH VT interface in a particular 15-minute interval in the past 24 hours." ::= { sonetFarEndVTIntervalEntry 2 }sonetFarEndVTIntervalSESs OBJECT-TYPE
SYNTAX PerfIntervalCount MAX-ACCESS read-only STATUS current DESCRIPTION "The counter associated with the number of Far End Severely Errored Seconds encountered by a SONET/SDH VT interface in a particular 15-minute interval in the past 24 hours." ::= { sonetFarEndVTIntervalEntry 3 }sonetFarEndVTIntervalCVs OBJECT-TYPE
SYNTAX PerfIntervalCount MAX-ACCESS read-only STATUS current DESCRIPTION "The counter associated with the number of Far End Coding Violations reported via the far end block error count encountered by a SONET/SDH VT interface in a 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 } -- conformance information sonetConformance OBJECT IDENTIFIER ::= { sonetMIB 4 } sonetGroups OBJECT IDENTIFIER ::= { sonetConformance 1 } sonetCompliances OBJECT IDENTIFIER ::= { sonetConformance 2 }-- deprecated compliance statement
sonetCompliance MODULE-COMPLIANCE
STATUS deprecated DESCRIPTION "The compliance statement for SONET/SDH interfaces." MODULE -- this module MANDATORY-GROUPS { sonetMediumStuff, sonetSectionStuff } GROUP sonetLineStuff DESCRIPTION "Implementation of this group is mandatory for all SONET/SDH systems that terminate SONET/SDH Lines, Paths or Virtual Tributaries." GROUP sonetFarEndLineStuff DESCRIPTION "Implementation of this group is optional for all SONET/SDH systems that terminate SONET/SDH Lines, Paths or Virtual Tributaries, and that provide for a far end block error (FEBE) information at the SONET/SDH Line Layer." GROUP sonetPathStuff DESCRIPTION "Implementation of this group is mandatory for all SONET/SDH systems that terminate SONET/SDH Paths or Virtual Tributaries." OBJECT sonetPathCurrentWidth MIN-ACCESS read-only DESCRIPTION "Write access is not required." GROUP sonetFarEndPathStuff DESCRIPTION "Implementation of this group is optional for all SONET/SDH systems that terminate SONET/SDH Paths or Virtual Tributaries, and that process Far End information." GROUP sonetVTStuff DESCRIPTION "Implementation of this group is mandatory for all SONET/SDH systems that terminate SONET/SDH Virtual Tributaries." OBJECT sonetVTCurrentWidth MIN-ACCESS read-only DESCRIPTION "Write access is not required." GROUP sonetFarEndVTStuff DESCRIPTION "Implementation of this group is optional for all SONET/SDH systems that terminate the SONET/SDH floating Virtual Tributaries, and that process Far End information." ::= { sonetCompliances 1 }-- current compliance statements
sonetCompliance2 MODULE-COMPLIANCE
STATUS current DESCRIPTION "The compliance statement for SONET/SDH interfaces." MODULE -- this module MANDATORY-GROUPS { sonetMediumStuff2, sonetSectionStuff2 } OBJECT 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-
-
-
"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 SONET/SDH systems that terminate SONET/SDH Virtual Tributaries." OBJECT sonetVTCurrentWidth MIN-ACCESS read-only DESCRIPTION "Write access is not required." GROUP sonetFarEndVTStuff2 DESCRIPTION "Implementation of this group is optional for all SONET/SDH systems that terminate the SONET/SDH floating Virtual Tributaries, and that process Far End information." ::= { sonetCompliances 2 }-- units of conformance
-- deprecated groups sonetMediumStuff OBJECT-GROUP OBJECTS { sonetMediumType, sonetMediumTimeElapsed, sonetMediumValidIntervals, sonetMediumLineCoding, sonetMediumLineType, sonetMediumCircuitIdentifier } STATUS deprecated DESCRIPTION "A collection of objects providing configuration information applicable to all SONET/SDH interfaces." ::= { sonetGroups 1 } sonetSectionStuff OBJECT-GROUP OBJECTS { sonetSectionCurrentStatus, sonetSectionCurrentESs, sonetSectionCurrentSESs, sonetSectionCurrentSEFSs, sonetSectionCurrentCVs, sonetSectionIntervalESs, sonetSectionIntervalSESs, sonetSectionIntervalSEFSs, sonetSectionIntervalCVs } STATUS deprecated DESCRIPTION "A collection of objects providing information specific to SONET/SDH Section interfaces." ::= { sonetGroups 2 } sonetLineStuff OBJECT-GROUP OBJECTS { sonetLineCurrentStatus, sonetLineCurrentESs, sonetLineCurrentSESs, sonetLineCurrentCVs, sonetLineCurrentUASs, sonetLineIntervalESs, sonetLineIntervalSESs, sonetLineIntervalCVs, sonetLineIntervalUASs } STATUS deprecated DESCRIPTION "A collection of objects providing information specific to SONET/SDH Line interfaces." ::= { sonetGroups 3 } sonetFarEndLineStuff OBJECT-GROUP OBJECTS { sonetFarEndLineCurrentESs, sonetFarEndLineCurrentSESs, sonetFarEndLineCurrentCVs, sonetFarEndLineCurrentUASs, sonetFarEndLineIntervalESs, sonetFarEndLineIntervalSESs, sonetFarEndLineIntervalCVs, sonetFarEndLineIntervalUASs } STATUS deprecated DESCRIPTION "A collection of objects providing information specific to SONET/SDH Line interfaces, and maintaining Line Far End information." ::= { sonetGroups 4 } sonetPathStuff OBJECT-GROUP OBJECTS { sonetPathCurrentWidth, sonetPathCurrentStatus, sonetPathCurrentESs, sonetPathCurrentSESs, sonetPathCurrentCVs, sonetPathCurrentUASs, sonetPathIntervalESs, sonetPathIntervalSESs, sonetPathIntervalCVs, sonetPathIntervalUASs } STATUS deprecated DESCRIPTION "A collection of objects providing information specific to SONET/SDH Path interfaces." ::= { sonetGroups 5 } sonetFarEndPathStuff OBJECT-GROUP OBJECTS { sonetFarEndPathCurrentESs, sonetFarEndPathCurrentSESs, sonetFarEndPathCurrentCVs, sonetFarEndPathCurrentUASs, sonetFarEndPathIntervalESs, sonetFarEndPathIntervalSESs, sonetFarEndPathIntervalCVs, sonetFarEndPathIntervalUASs } STATUS deprecated DESCRIPTION "A collection of objects providing information specific to SONET/SDH Path interfaces, and maintaining Path Far End information." ::= { sonetGroups 6 } sonetVTStuff OBJECT-GROUP OBJECTS { sonetVTCurrentWidth, sonetVTCurrentStatus, sonetVTCurrentESs, sonetVTCurrentSESs, sonetVTCurrentCVs, sonetVTCurrentUASs, sonetVTIntervalESs, sonetVTIntervalSESs, sonetVTIntervalCVs, sonetVTIntervalUASs } STATUS deprecated DESCRIPTION "A collection of objects providing information specific to SONET/SDH VT interfaces." ::= { sonetGroups 7 } sonetFarEndVTStuff OBJECT-GROUP OBJECTS { sonetFarEndVTCurrentESs, sonetFarEndVTCurrentSESs, sonetFarEndVTCurrentCVs, sonetFarEndVTCurrentUASs, sonetFarEndVTIntervalESs, sonetFarEndVTIntervalSESs, sonetFarEndVTIntervalCVs, sonetFarEndVTIntervalUASs } STATUS deprecated DESCRIPTION "A collection of objects providing information specific to SONET/SDH VT interfaces, and maintaining VT Far End information." ::= { sonetGroups 8 } -- current groups sonetMediumStuff2 OBJECT-GROUP OBJECTS { sonetMediumType, sonetMediumTimeElapsed, sonetMediumValidIntervals, sonetMediumLineCoding, sonetMediumLineType, sonetMediumCircuitIdentifier, sonetMediumInvalidIntervals, sonetMediumLoopbackConfig, sonetSESthresholdSet } STATUS current DESCRIPTION "A collection of objects providing configuration information applicable to all SONET/SDH interfaces." ::= { sonetGroups 9 } sonetSectionStuff2 OBJECT-GROUP OBJECTS { sonetSectionCurrentStatus, sonetSectionCurrentESs, sonetSectionCurrentSESs, sonetSectionCurrentSEFSs, sonetSectionCurrentCVs, sonetSectionIntervalESs, sonetSectionIntervalSESs, sonetSectionIntervalSEFSs, sonetSectionIntervalCVs, sonetSectionIntervalValidData } STATUS current DESCRIPTION "A collection of objects providing information specific to SONET/SDH Section interfaces." ::= { sonetGroups 10 } sonetLineStuff2 OBJECT-GROUP OBJECTS { sonetLineCurrentStatus, sonetLineCurrentESs, sonetLineCurrentSESs, sonetLineCurrentCVs, sonetLineCurrentUASs, sonetLineIntervalESs, sonetLineIntervalSESs, sonetLineIntervalCVs, sonetLineIntervalUASs, sonetLineIntervalValidData } STATUS current DESCRIPTION "A collection of objects providing information specific to SONET/SDH Line interfaces." ::= { sonetGroups 11 } sonetPathStuff2 OBJECT-GROUP OBJECTS { sonetPathCurrentWidth, sonetPathCurrentStatus, sonetPathCurrentESs, sonetPathCurrentSESs, sonetPathCurrentCVs, sonetPathCurrentUASs, sonetPathIntervalESs, sonetPathIntervalSESs, sonetPathIntervalCVs, sonetPathIntervalUASs, sonetPathIntervalValidData } STATUS current DESCRIPTION "A collection of objects providing information specific to SONET/SDH Path interfaces." ::= { sonetGroups 12 } sonetVTStuff2 OBJECT-GROUP OBJECTS { sonetVTCurrentWidth, sonetVTCurrentStatus, sonetVTCurrentESs, sonetVTCurrentSESs, sonetVTCurrentCVs, sonetVTCurrentUASs, sonetVTIntervalESs, sonetVTIntervalSESs, sonetVTIntervalCVs, sonetVTIntervalUASs, sonetVTIntervalValidData } STATUS current DESCRIPTION "A collection of objects providing information specific to SONET/SDH VT interfaces." ::= { sonetGroups 13 } sonetFarEndLineStuff2 OBJECT-GROUP OBJECTS { sonetFarEndLineCurrentESs, sonetFarEndLineCurrentSESs, sonetFarEndLineCurrentCVs, sonetFarEndLineCurrentUASs, sonetFarEndLineIntervalESs, sonetFarEndLineIntervalSESs, sonetFarEndLineIntervalCVs, sonetFarEndLineIntervalUASs, sonetFarEndLineIntervalValidData } STATUS current DESCRIPTION "A collection of objects providing information specific to SONET/SDH Line interfaces, and maintaining Line Far End information." ::= { sonetGroups 14 } sonetFarEndPathStuff2 OBJECT-GROUP OBJECTS { sonetFarEndPathCurrentESs, sonetFarEndPathCurrentSESs, sonetFarEndPathCurrentCVs, sonetFarEndPathCurrentUASs, sonetFarEndPathIntervalESs, sonetFarEndPathIntervalSESs, sonetFarEndPathIntervalCVs, sonetFarEndPathIntervalUASs, sonetFarEndPathIntervalValidData } STATUS current DESCRIPTION "A collection of objects providing information specific to SONET/SDH Path interfaces, and maintaining Path Far End information." ::= { sonetGroups 15 } sonetFarEndVTStuff2 OBJECT-GROUP OBJECTS { sonetFarEndVTCurrentESs, sonetFarEndVTCurrentSESs, sonetFarEndVTCurrentCVs, sonetFarEndVTCurrentUASs, sonetFarEndVTIntervalESs, sonetFarEndVTIntervalSESs, sonetFarEndVTIntervalCVs, sonetFarEndVTIntervalUASs, sonetFarEndVTIntervalValidData } STATUS current DESCRIPTION "A collection of objects providing information specific to SONET/SDH VT interfaces, and maintaining VT Far End information." ::= { sonetGroups 16 } END -
5. Acknowledgments
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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
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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 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
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[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. [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.
7.2. Informative References
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[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
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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.
Appendix A: The delay-line approach to statistics collection.
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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
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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
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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. +--------------------------------------------------------------+ | 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.
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
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This appendix contains the values for x for the Section, Line, Path, and VT Layers as used in [T1M1.3][RFC1595][TR253].
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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
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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
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Value for x for SONET/SDH STS-Path SES Definition
Rate x Minimum Bit Error Rate ======================================================= STS-1 9 1.5 x 10^-7 STS-3 16 1 x 10^-7
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Value for x for SONET/SDH VT-Path SES Definition
Rate x Minimum Bit Error Rate ======================================================= VT1.5 4 2 x 10^-6 VT2 6 2 x 10^-6 VT3 8 2 x 10^-6 VT6 14 2 x 10^-6
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Author's Address
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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
Full Copyright Statement
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Copyright © 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
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Funding for the RFC Editor function is currently provided by the Internet Society.