HTTP/1.1 200 OK Date: Tue, 09 Apr 2002 08:51:54 GMT Server: Apache/1.3.20 (Unix) Last-Modified: Fri, 09 Feb 1996 23:00:00 GMT ETag: "323d2f-21dd2-311bd1f0" Accept-Ranges: bytes Content-Length: 138706 Connection: close Content-Type: text/plain INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 Definitions of Managed Objects for the DS1, E1, DS2 and E2 Interface Types Thu Feb 8 19:48:26 1996 draft-ietf-trunkmib-ds1-mib-01.txt David Fowler (editor) Newbridge Networks davef@newbridge.com Status of this Memo This document is an Internet-Draft. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF), its areas, and its working groups. Note that other groups may also distribute working documents as Internet-Drafts. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as ``work in progress.'' To learn the current status of any Internet-Draft, please check the ``1id-abstracts.txt'' listing contained in the Internet-Drafts Shadow Directories on ds.internic.net (US East Coast), nic.nordu.net (Europe), ftp.isi.edu (US West Coast), or munnari.oz.au (Pacific Rim). Abstract This memo defines an experimental portion of the Management Information Base (MIB) for use with network management protocols in the Internet community. In particular, it describes objects used for managing DS1, E1, DS2 and E2 interfaces. This document is a companion document with Definitions of Managed Objects for the DS3/E3 and SONET/SDH Interface Types, rfc1407 [17] and rfc1595 [18]. This memo specifies a MIB module in a manner that is both compliant to the SNMPv2 SMI, and semantically identical to the peer SNMPv1 definitions. Expires August 1996 [Page 1] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 This memo does not specify a standard for the Internet community. This document entirely replaces RFC 1406. 1. The SNMPv2 Network Management Framework The SNMP Network Management Framework presently consists of three major components. They are: o the SMI, described in RFC 1902 [1] - the mechanisms used for describing and naming objects for the purpose of management. o the MIB-II, STD 17, RFC 1213 [2] - the core set of managed objects for the Internet suite of protocols. o the protocol, RFC 1157 [3] and/or RFC 1905 [4], - the protocol for accessing managed objects. The Framework permits new objects to be defined for the purpose of experimentation and evaluation. Expires August 1996 [Page 2] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 2. Object Definitions Managed objects are accessed via a virtual information store, termed the Management Information Base or MIB. Objects in the MIB are defined using the subset of Abstract Syntax Notation One (ASN.1) defined in the SMI. In particular, each object type is named by an OBJECT IDENTIFIER, an administratively assigned name. The object type together with an object instance serves to uniquely identify a specific instantiation of the object. For human convenience, we often use a textual string, termed the descriptor, to also refer to the object type. 2.1. Changes from RFC1406 The changes from RFC1406 are the following: (1) The Fractional Table has been deprecated (2) This document uses SMIv2 (3) Values are given for ifTable and ifXTable (4) Example usage of ifStackTable is included (5) dsx1IfIndex has been deprecated (6) Support for DS2 and E2 have been added (7) An additional lineType for unframed E1 was added (8) The definition of valid intervals has been clarified for the case where the agent proxied for other devices. In particular, the treatment of missing intervals has been clarified. (9) An inward loopback has been added. (10) Additional lineStatus bits have been added for Near End in Unavailable Signal State, Carrier Equipment Out of Service, DS@ Payload AIS, and DS@ Performance Threshold (11) A line Length object has been added. (12) Signal mode of other has been added. Expires August 1996 [Page 3] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 (13) Added a lineStatus last change, trap and enabler. Expires August 1996 [Page 4] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 3. Overview These objects are used when the particular media being used to realize an interface is a DS1/E1/DS2/E2 interface. At present, this applies to these values of the ifType variable in the Internet- standard MIB: ds1 (18) The definitions contained herein are based on the AT&T T-1 Superframe (a.k.a., D4) and Extended Superframe (ESF) formats [6, 7], the latter of which conforms to ANSI specifications [8], and the CCITT Recommendations [9, 10], referred to as E1 for the rest of this memo. The various DS1 and E1 line disciplines are similar enough that separate MIBs are unwarranted, although there are some differences. For example, Loss of Frame is defined more rigorously in the ESF specification than in the D4 specification, but it is defined in both. Where it is necessary to distinguish between the flavors of E1 with and without CRC, E1-CRC to denotes the "with CRC" form (G.704 Table 4b) and E1-noCRC denotes the "without CRC" form (G.704 Table 4a). 3.1. Use of ifTable for DS1 Layer Only the ifGeneralGroup needs to be supported. ifTable Object Use for DS1 Layer ====================================================================== ifIndex Interface index. ifDescr Textual Description of the interface ifType ds1(18) ifSpeed Speed of line rate DS1 - 1544000 E1 - 2048000 DS2 - 6312000 E2 - 8448000 ifPhysAddress The value of the Circuit Identifier. If no Circuit Identifier has been assigned this object should have an octet string with Expires August 1996 [Page 5] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 zero length. ifAdminStatus Supports read-only access. The desired administrative status of the interface. ifOperStatus The current operational status of the interface. ifLastChange sysUpTime at the last change in ifOperStatus. ifName Textual name of the interface or an OCTET STRING of zero length. ifLinkUpDownTrapEnable Set to enabled(1). ifHighSpeed Speed of line in Mega-bits per second (2, 6, or 8) ifConnectorPresent Set to true(1) normally, except for cases such as DS1/E1 over AAL1/ATM where false(2) is appropriate 3.2. Using ifStackTable The objects dsx1IfIndex has been deprecated. This object previously allowed a very special proxy situation to exist for Routers and CSUs. This section now describes how to use ifStackTable to represent this relationship. The paragraphs discussing dsx1IfIndex and dsx1LineIndex have been preserved in Appendix A for informational purposes. Expires August 1996 [Page 6] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 External&Internal interface scenario: the SNMP Agents resides on an host external from the device supporting DS1 interfaces (e.g., a router). The Agent represents both the host and the DS1 device. Example: A shelf full of CSUs connected to a Router. An SNMP Agent residing on the router proxies for itself and the CSU. The router has also an Ethernet interface: +-----+ | | | | | | +---------------------+ |E | | 1.544 MBPS | Line#A | DS1 Link |t | R |---------------+ - - - - - - - - - +------> |h | | | | |e | O | 1.544 MBPS | Line#B | DS1 Link |r | |---------------+ - - - - - - - - - - +------> |n | U | | CSU Shelf | |e | | 1.544 MBPS | Line#C | DS1 Link |t | T |---------------+ - - - -- -- - - - - +------> | | | | | |-----| E | 1.544 MBPS | Line#D | DS1 Link | | |---------------+ - - - - -- - - - - +------> | | R | |_____________________| | | | | +-----+ The assignment of the index values could for example be: ifIndex Description 1 Ethernet 2 Line#A Router 3 Line#B Router 4 Line#C Router 5 Line#D Router 6 Line#A CSU Router 7 Line#B CSU Router 8 Line#C CSU Router 9 Line#D CSU Router 10 Line#A CSU Network 11 Line#B CSU Network 12 Line#C CSU Network 13 Line#D CSU Network Expires August 1996 [Page 7] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 The ifStackTable is then used to show the relationships between the various DS1 interfaces. ifStackTable Entries HigherLayer LowerLayer 2 6 3 7 4 8 5 9 6 10 7 11 8 12 9 13 If the CSU shelf is managed by itself by a local SNMP Agent, the situation would be identical, except the Ethernet and the 4 router interfaces are deleted. Interfaces would also be numbered from 1 to 8. ifIndex Description 1 Line#A CSU Router 2 Line#B CSU Router 3 Line#C CSU Router 4 Line#D CSU Router 5 Line#A CSU Network 6 Line#B CSU Network 7 Line#C CSU Network 8 Line#D CSU Network ifStackTable Entries HigherLayer LowerLayer 1 5 2 6 3 7 4 8 3.3. Objectives of this MIB Module There are numerous things that could be included in a MIB for DS1 signals: the management of multiplexors, CSUs, DSUs, and the like. The intent of this document is to facilitate the common management of all devices with DS1 interfaces. As such, a design decision was made up front to very closely align the MIB with the set of objects that Expires August 1996 [Page 8] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 can generally be read from DS1 devices that are currently deployed. 3.4. DS1 Terminology The terminology used in this document to describe error conditions on a DS1 interface as monitored by a DS1 device are based on the definitions from the ANSI T1.231 standard [11]. If the definition in this document does not match the definition in the ANSI T1.231 document, the implementer should follow the definition described in this document. 3.4.1. Error Events Bipolar Violation (BPV) Error Event A BPV error event for an AMI-coded signal is the occurrence of a pulse of the same polarity as the previous pulse. A BPV error event for a B8ZS- or HDB3- coded signal is the occurrence of a pulse of the same polarity as the previous pulse without being a part of the zero substitution code. (See T1.231) Excessive Zeroes (EXZ) Error Event An Excessive Zeroes error event for an AMI-coded signal is the occurrence of more than fifteen contiguous zeroes. For a B8ZS coded signal, the defect occurs when more than seven contiguous zeroes are detected. (See T1.231) Line Coding Violation (LCV) Error Event A Line Coding Violation (LCV) is the occurrence of either a Bipolar Violation (BPV) or Excessive Zeroes (EXZ) Error Event. ( Path Coding Violation (PCV) Error Event A Path Coding Violation error event is a frame synchronization bit error in the D4 and E1-noCRC formats, or a CRC error in the ESF and E1-CRC formats. (See T1.231) Controlled Slip (CS) Error Event A Controlled Slip is the replication or deletion of the payload bits of a DS1 frame. A Controlled Slip may be performed when there is a difference between the timing of a synchronous receiving terminal and the received signal. A Controlled Slip does not cause an Out of Frame defect. (See T1.231) Expires August 1996 [Page 9] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 3.4.2. Performance Defects Out Of Frame (OOF) Defect An OOF defect is the occurrence of a particular density of Framing Error events. (See T1.231) For DS1 links, an Out of Frame defect is declared when the receiver detects two or more framing errors within a 3 msec period for ESF signals and 0.75 msec for D4 signals, or two or more errors out of five or fewer consecutive framing-bits. For E1 links, an Out Of Frame defect is declared when three consecutive frame alignment signals have been received with an error (see G.706 Section 4.1 [15]). For DS2 links, an Out of Frame defect is declared when 7 or more consecutive errored framing patterns (4 multiframe) are received. The LOF is cleared when 3 or more consecutive correct framing patterns are received. Once an Out Of Frame Defect is declared, the framer starts searching for a correct framing pattern. The Out of Frame defect ends when the signal is in frame. In-frame occurs when there are fewer than two frame bit errors within 3 msec period for ESF signals and 0.75 msec for D4 signals. For E1 links, in-frame occurs when a) in frame N the frame alignment signal is correct and b) in frame N+1 the frame alignment signal is absent (i.e., bit 2 in TS0 is a one) and c) in frame N+2 the frame alignment signal is present and correct. Alarm Indication Signal (AIS) Defect For D4 and ESF links, the 'all ones' condition is detected at a DS1 line interface upon observing an unframed signal with a one's density of at least 99.9% present for a time equal to or greater than T, where 3 ms <= T <= 75 ms. The AIS is terminated upon observing a signal not meeting the one's density or the unframed signal criteria for a period equal to or greater than than T. Expires August 1996 [Page 10] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 For E1 links, the 'all-ones' condition is detected at the line interface as a string of 512 bits containing fewer than three zero bits (see O.162 [12] Section 3.3.2). For DS2 links, the DS2 AIS shall be sent from the NT1 to the user to indicate a loss of the 6,312 kbps frame capability on the network side. The DS2 AIS is defined as a bit array of 6,312 kbps in which all binary bits are set to '1'. The DS2 AIS detection and removal shall be implemented according to ITU-T Draft Recommendation G.775[20]: - a DS2 AIS defect is detected when the incoming signal has two (2) or less ZEROs in a sequence of 3156 bits (0.5 ms). - a DS2 AIS defect is cleared when the incoming signal has three (3) or more ZEROs ina sequence of 3156 bits (0.5 ms). 3.4.3. Performance Parameters All performance parameters are accumulated in fifteen minute intervals and up to 96 intervals (24 hours worth) are kept by an agent. Fewer than 96 intervals of data will be available if the agent has been restarted within the last 24 hours. In addition, there is a rolling 24-hour total of each performance parameter. There is no requirement for an agent to ensure fixed relationship between the start of a fifteen minute interval and any wall clock; however some agents may align the fifteen minute intervals with quarter hours. Performance parameters are of type Gauge32 because it is possible for these objects to decrease. Objects may decrease when Unavailable Seconds occurs across a fifteen minutes interval boundary. See Unavailable Seconds discussion later in this section. Line Errored Seconds (LES) A Line Errored Second, according to T1.231, is a second in which one or more Line Code Violation error events were detected. While many implementations are currently unable to detect the zero strings, it is expected that interface manufacturers will add this capability in deference to Expires August 1996 [Page 11] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 ANSI; therefore, it will become available in time. In the T1.231 specification, near end Line Code Violations and far end Line Errored Seconds are counted. For consistency, we count Line Errored Seconds at both ends. Controlled Slip Seconds (CSS) A Controlled Slip Second, according to T1.231, is a one-second interval containing one or more controlled slips. Errored Seconds (ES) According to T1.231, For ESF and E1-CRC links an Errored Second is a second with one or more Path Code Violation OR one or more Out of Frame defects OR one or more Controlled Slip events OR a detected AIS defect. For D4 and E1-noCRC links, the presence of Bipolar Violations also triggers an Errored Second. This is not incremented during an Unavailable Second. Bursty Errored Seconds (BES) A Bursty Errored Second (also known as Errored Second type B in T1.231) is a second with fewer than 320 and more than 1 Path Coding Violation error events, no Severely Errored Frame defects and no detected incoming AIS defects. Controlled slips are not included in this parameter. This is not incremented during an Unavailable Second. Severely Errored Seconds (SES) According to T1.231, a Severely Errored Second for ESF signals is a second with 320 or more Path Code Violation Error Events OR one or more Out of Frame defects OR a detected AIS defect. For E1-CRC signals, a Severely Errored Second is a second with 832 or more Path Code Violation error events OR one or more Out of Frame defects. For E1-noCRC signals, a Severely Errored Second is a 2048 LCVs or more. Expires August 1996 [Page 12] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 For D4 signals, a Severely Errored Second is a count of one-second intervals with Framing Error events, or an OOF defect, or 1544 LCVs or more. Controlled slips are not included in this parameter. This is not incremented during an Unavailable Second. Severely Errored Framing Second (SEFS) An Severely Errored Framing Second is a second with one or more Out of Frame defects OR a detected AIS defect, according to T1.231 Degraded Minutes A Degraded Minute is one in which the estimated error rate exceeds 1E-6 but does not exceed 1E-3 (see G.821 [13]). Degraded Minutes are determined by collecting all of the Available Seconds, removing any Severely Errored Seconds grouping the result in 60-second long groups and counting a 60-second long group (a.k.a., minute) as degraded if the cumulative errors during the seconds present in the group exceed 1E-6. Available seconds are merely those seconds which are not Unavailable as described below. Unavailable Seconds (UAS) Unavailable Seconds (UAS) are calculated by counting the number of seconds that the interface is unavailable. The DS1 interface is said to be unavailable from the onset of 10 contiguous SESs, or the onset of the condition leading to a failure (see Failure States). If the condition leading to the failure was immediately preceded by one or more contiguous SESs, then the DS1 interface unavailability starts from the onset of these SESs. Once unavailable, and if no failure is present, the DS1 interface becomes available at the onset of 10 contiguous seconds with no SESs. Once unavailable, and if a failure is present, the DS1 interface becomes available at the onset of 10 contiguous seconds with no SESs, if the failure clearing time is less than or equal to 10 seconds. If the failure clearing time is more than 10 seconds, the DS1 interface becomes available at the onset of 10 contiguous seconds with no SESs, or the onset period leading to the successful clearing condition, Expires August 1996 [Page 13] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 whichever occurs later. With respect to the DS1 error counts, all counters are incremented while the DS1 interface is deemed available. While the interface is deemed unavailable, the only count that is incremented is UASs. (See T1.231) A special case exists when the 10 or more second period crosses the 900 second statistics window boundary, as the foregoing description implies that the Severely Errored Second and Unavailable Second counters for the PREVIOUS interval must be adjusted when the Unavailable Signal State is entered. Clearly, successive GETs of the affected dsx1IntervalSESs and dsx1IntervalUASs objects will return differing values if the first GET occurs during the first few seconds of the window. This is viewed as an unavoidable side-effect of selecting the presently defined managed objects as a basis for this memo. To summarize, when the unavialable state is entered, SES is reduced by 10 and UAS is increased by 10. The linkDown trap is sent at the start of the unavailable period, but the time on the trap will be tate of the first UAS, (i.e. 10 seconds earlier). The UAS effect can be acheived by using a delay technique. This is described in Appendix B. 3.4.4. Failure States The following failure states are received, or detected failures, that are reported in the dsx1LineStatus object. When a DS1 interface would, if ever, produce the conditions leading to the failure state is described in the appropriate specification. Far End Alarm Failure The Far End Alarm failure is also known as "Yellow Alarm" in the DS1 case, "Distant Alarm" in the E1 case, and "and Remote Alarm in the DS2 case." . (See T1.231) For D4 links, the Far End Alarm failure is declared when bit 6 of all channels has been zero for at least 335 ms and is cleared when bit 6 of at least one channel is non-zero for a period T, where T is usually less than one second and always less than 5 seconds. The Far End Alarm failure is not declared for D4 links when a Loss of Expires August 1996 [Page 14] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 Signal is detected. For ESF links, the Far End Alarm failure is declared if the Yellow Alarm signal pattern occurs in at least seven out of ten contiguous 16-bit pattern intervals and is cleared if the Yellow Alarm signal pattern does not occur in ten contiguous 16-bit signal pattern intervals. For E1 links, the Far End Alarm failure is declared when bit 3 of time-slot zero is received set to one on two consecutive occasions. The Far End Alarm failure is cleared when bit 3 of time-slot zero is received set to zero. For DS2 links, if a loss of frame alignment (LOF or LOS) and/or DS2 AIS condition, is detected, the RAI signal shall be generated and transmitted to the remote side. The Remote Alarm Indication(RAI) signal is defined on m-bits as a repetition of the 16bit sequence consisting of eight binary '1s' and eight binary '0s' in m-bits(1111111100000000). When the RAI signal is not sent (in normal operation),the HDLC flag pattern (01111110) in the m-bit is sent. The RAI failure is detected when 16 or more consecutive RAI-patterns (1111111100000000) are received. The RAI failure is cleared when 4 or more consecutive incorrect-RAI-patterns are received. Alarm Indication Signal (AIS) Failure The Alarm Indication Signal failure is declared when an AIS defect is detected at the input and the AIS defect still exists after the Loss Of Frame failure (which is caused by the unframed nature of the 'all-ones' signal) is declared. The AIS failure is cleared when the Loss Of Frame failure is cleared. (See T1.231) An AIS defect at a 6312 kbit/s (G.704) interface is detected when the incoming signal has two {2} or less ZEROs in a sequence of 3156 bits (0.5ms). The AIS signal defect is cleared when the incoming signal has three {3} or more ZEROs in a sequence of 3156 bits (0.5ms). Expires August 1996 [Page 15] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 Loss Of Frame Failure For DS1 links, the Loss Of Frame failure is declared when an OOF or LOS defect has persisted for T seconds, where 2 <= T <= 10. The Loss Of Frame failure is cleared when there have been no OOF or LOS defects during a period T where 0 <= T <= 20. Many systems will perform "hit integration" within the period T before declaring or clearing the failure e.g., see TR 62411 [14]. For E1 links, the Loss Of Frame Failure is declared when an OOF defect is detected. Loss Of Signal Failure For DS1, the Loss Of Signal failure is declared upon observing 175 +/- 75 contiguous pulse positions with no pulses of either positive or negative polarity. The LOS failure is cleared upon observing an average pulse density of at least 12.5% over a period of 175 +/- 75 contiguous pulse positions starting with the receipt of a pulse. For E1 links, the Loss Of Signal failure is declared when greater than 10 consecutive zeroes are detected (see O.162 Section 3.4.4). A LOS defect at 6312kbit/s interfaces is detected when the incoming signal has "no transitions", i.e. when the signal level is less than or equal to a signal level of 35dB below nominal, for N consecutive pulse intervals, where 10 <=N<=255. The LOS defect is cleared when the incoming signal has "transitions", i.e. when the signal level is greater than or equal to a signal level of 9dB below nominal, for N consecutive pulse intervals, where 10<=N<=255. A signal with "transitions" corresponds to a G.703 compliant signal. Loopback Pseudo-Failure The Loopback Pseudo-Failure is declared when the near end equipment has placed a loopback (of any kind) on the DS1. This allows a management entity to determine from one object whether the DS1 can be considered to be in service or not (from the point of view of the near end Expires August 1996 [Page 16] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 equipment). TS16 Alarm Indication Signal Failure For E1 links, the TS16 Alarm Indication Signal failure is declared when time-slot 16 is received as all ones for all frames of two consecutive multiframes (see G.732 Section 4.2.6). This condition is never declared for DS1. Loss Of MultiFrame Failure The Loss Of MultiFrame failure is declared when two consecutive multiframe alignment signals (bits 4 through 7 of TS16 of frame 0) have been received with an error. The Loss Of Multiframe failure is cleared when the first correct multiframe alignment signal is received. The Loss Of Multiframe failure can only be declared for E1 links operating with G.732 [16] framing (sometimes called "Channel Associated Signalling" mode). Far End Loss Of Multiframe Failure The Far End Loss Of Multiframe failure is declared when bit 2 of TS16 of frame 0 is received set to one on two consecutive occasions. The Far End Loss Of Multiframe failure is cleared when bit 2 of TS16 of frame 0 is received set to zero. The Far End Loss Of Multiframe failure can only be declared for E1 links operating in "Channel Associated Signalling" mode. (See G.732) DS2 Payload AIS Failure The DS2 Payload AIS is detected when the incoming signal of the 6,312 kbps frame payload [TS1-TS96] has 2 or less 0's in a sequence of 3072 bits (0.5ms). The DS2 Payload AIS is cleared when the incoming signal of the 6,312 kbps frame payload [TS1-TS96] has 3 or more 0's in a sequence of 3072 bits (0.5 ms). DS2 Performance Threshold DS2 Performance Threshold Failure monitors equipment performance and is based on the CRC (Cyclic Redundancy Check) Procedure defined in G.704. The DS2 Performance Threshold Failure is detected when the bit error ratio exceeds 10^-4 (Performance Threshold), and the DS2 Performance Threshold Failure shall be cleared when the bit error ratio decreased to less than 10^-6." Expires August 1996 [Page 17] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 3.4.5. Other Terms Circuit Identifier This is a character string specified by the circuit vendor, and is useful when communicating with the vendor during the troubleshooting process. Expires August 1996 [Page 18] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 4. Object Definitions DS1-MIB DEFINITIONS ::= BEGIN IMPORTS MODULE-IDENTITY, OBJECT-TYPE, Gauge32, NOTIFICATION-TYPE FROM SNMPv2-SMI DisplayString, TimeStamp FROM SNMPv2-TC MODULE-COMPLIANCE, OBJECT-GROUP FROM SNMPv2-CONF transmission FROM RFC1213-MIB; -- This is the MIB module for the DS1, E1, DS2, and E2 Interface -- objects. ds1 MODULE-IDENTITY LAST-UPDATED "9602032200Z" ORGANIZATION "IETF Trunk MIB Working Group" CONTACT-INFO " David Fowler Postal: Newbridge Networks Corporation 600 March Road Kanata, Ontario, Canada K2K 2E6 Tel: +1 613 591 3600 Fax: +1 613 591 3680 E-mail: davef@newbridge.com" DESCRIPTION "The MIB module to describe DS1 interfaces objects." ::= { transmission 18 } -- note that this subsumes cept (19); there is no separate CEPT MIB Expires August 1996 [Page 19] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 -- The DS1 Near End Group -- Implementation of this group is mandatory for all -- systems that attach to a DS1 Interface. -- The DS1 Near End Group consists of four tables: -- DS1 Configuration -- DS1 Current -- DS1 Interval -- DS1 Total -- the DS1 Configuration Table dsx1ConfigTable OBJECT-TYPE SYNTAX SEQUENCE OF Dsx1ConfigEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "The DS1 Configuration table." ::= { ds1 6 } dsx1ConfigEntry OBJECT-TYPE SYNTAX Dsx1ConfigEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "An entry in the DS1 Configuration table." INDEX { dsx1LineIndex } ::= { dsx1ConfigTable 1 } Dsx1ConfigEntry ::= SEQUENCE { dsx1LineIndex INTEGER, dsx1IfIndex INTEGER, dsx1TimeElapsed INTEGER, dsx1ValidIntervals INTEGER, dsx1LineType INTEGER, dsx1LineCoding INTEGER, dsx1SendCode Expires August 1996 [Page 20] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 INTEGER, dsx1CircuitIdentifier DisplayString, dsx1LoopbackConfig INTEGER, dsx1LineStatus INTEGER, dsx1SignalMode INTEGER, dsx1TransmitClockSource INTEGER, dsx1Fdl INTEGER, dsx1InvalidIntervals INTEGER, dsx1LineLength INTEGER, dsx1LineStatusLastChange TimeStamp, dsx1LineStatusChangeTrapEnable INTEGER } dsx1LineIndex OBJECT-TYPE SYNTAX INTEGER (1..'7fffffff'h) MAX-ACCESS read-only STATUS current DESCRIPTION "This object should be made equal to ifIndex. The next pargraph describes its previous usage. Making the object equal to ifIndex allows proper use of ifStackTable and ds0/ds0bundle mibs. Previously, this object is the identifier of a DS1 Interface on a managed device. If there is an ifEntry that is directly associated with this and only this DS1 interface, it should have the same value as ifIndex. Otherwise, number the dsx3LineIndices with an unique identifier following the rules of choosing a number that is greater than ifNumber and numbering the inside interfaces (e.g., equipment side) with even numbers and outside interfaces (e.g, network side) with odd numbers." ::= { dsx1ConfigEntry 1 } Expires August 1996 [Page 21] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 dsx1IfIndex OBJECT-TYPE SYNTAX INTEGER (1..65535) MAX-ACCESS read-only STATUS deprecated DESCRIPTION "This value for this object is equal to the value of ifIndex from the Interfaces table of MIB II (RFC 1213)." ::= { dsx1ConfigEntry 2 } dsx1TimeElapsed OBJECT-TYPE SYNTAX INTEGER (0..899) MAX-ACCESS read-only STATUS current DESCRIPTION "The number of seconds that have elapsed since the beginning of the near end current error- measurement period." ::= { dsx1ConfigEntry 3 } dsx1ValidIntervals OBJECT-TYPE SYNTAX INTEGER (0..96) MAX-ACCESS read-only STATUS current DESCRIPTION "The number of previous near end intervals for which valid data was collected. The value will be 96 unless the interface was brought online within the last 24 hours, in which case the value will be the number of complete 15 minute near end intervals since the interface has been online. In the case where the agent is a proxy, it is possible that some intervals are unavailable. In this case, this interval is the maximum interval number for which valid data is available." ::= { dsx1ConfigEntry 4 } dsx1LineType OBJECT-TYPE SYNTAX INTEGER { other(1), dsx1ESF(2), dsx1D4(3), dsx1E1(4), dsx1E1CRC(5), dsx1E1MF(6), Expires August 1996 [Page 22] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 dsx1E1CRCMF(7), dsx1Unframed(8), dsx1E1Unframed(9) } MAX-ACCESS read-write STATUS current DESCRIPTION "This variable indicates the variety of DS1 Line implementing this circuit. The type of circuit affects the number of bits per second that the circuit can reasonably carry, as well as the interpretation of the usage and error statistics. The values, in sequence, describe: TITLE: SPECIFICATION: dsx1ESF Extended SuperFrame DS1 dsx1D4 AT&T D4 format DS1 dsx1E1 CCITT Recommendation G.704 (Table 4a) dsx1E1-CRC CCITT Recommendation G.704 (Table 4b) dsxE1-MF G.704 (Table 4a) with TS16 multiframing enabled dsx1E1-CRC-MF G.704 (Table 4b) with TS16 multiframing enabled dsx1Unframed No Framing performed dsx1E1Unframed E1 with No Framing" ::= { dsx1ConfigEntry 5 } dsx1LineCoding OBJECT-TYPE SYNTAX INTEGER { dsx1JBZS (1), dsx1B8ZS (2), dsx1HDB3 (3), dsx1ZBTSI (4), dsx1AMI (5), other(6) } MAX-ACCESS read-write STATUS current DESCRIPTION "This variable describes the variety of Zero Code Suppression used on this interface, which in turn affects a number of its characteristics. Expires August 1996 [Page 23] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 dsx1JBZS refers the Jammed Bit Zero Suppression, in which the AT&T specification of at least one pulse every 8 bit periods is literally implemented by forcing a pulse in bit 8 of each channel. Thus, only seven bits per channel, or 1.344 Mbps, is available for data. dsx1B8ZS refers to the use of a specified pattern of normal bits and bipolar violations which are used to replace a sequence of eight zero bits. ANSI Clear Channels may use dsx1ZBTSI, or Zero Byte Time Slot Interchange. E1 links, with or without CRC, use dsx1HDB3 or dsx1AMI. dsx1AMI refers to a mode wherein no zero code suppression is present and the line encoding does not solve the problem directly. In this application, the higher layer must provide data which meets or exceeds the pulse density requirements, such as inverting HDLC data." ::= { dsx1ConfigEntry 6 } dsx1SendCode OBJECT-TYPE SYNTAX INTEGER { dsx1SendNoCode(1), dsx1SendLineCode(2), dsx1SendPayloadCode(3), dsx1SendResetCode(4), dsx1SendQRS(5), dsx1Send511Pattern(6), dsx1Send3in24Pattern(7), dsx1SendOtherTestPattern(8) } MAX-ACCESS read-write STATUS current DESCRIPTION "This variable indicates what type of code is being sent across the DS1 interface by the device. Setting this variable causes the interface to send the code requested. The values mean: Expires August 1996 [Page 24] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 dsx1SendNoCode sending looped or normal data dsx1SendLineCode sending a request for a line loopback dsx1SendPayloadCode sending a request for a payload loopback dsx1SendResetCode sending a loopback termination request dsx1SendQRS sending a Quasi-Random Signal (QRS) test pattern dsx1Send511Pattern sending a 511 bit fixed test pattern dsx1Send3in24Pattern sending a fixed test pattern of 3 bits set in 24 dsx1SendOtherTestPattern sending a test pattern other than those described by this object" ::= { dsx1ConfigEntry 7 } dsx1CircuitIdentifier 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." ::= { dsx1ConfigEntry 8 } dsx1LoopbackConfig OBJECT-TYPE SYNTAX INTEGER { dsx1NoLoop(1), dsx1PayloadLoop(2), dsx1LineLoop(3), dsx1OtherLoop(4), dsxInwardLoop(5) } Expires August 1996 [Page 25] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 MAX-ACCESS read-write STATUS current DESCRIPTION "This variable represents the loopback configuration of the DS1 interface. Agents supporting read/write access should return badValue in response to a requested loopback state that the interface does not support. The values mean: dsx1NoLoop Not in the loopback state. A device that is not capable of performing a loopback on the interface shall always return this as it's value. dsx1PayloadLoop The received signal at this interface is looped through the device. Typically the received signal is looped back for retransmission after it has passed through the device's framing function. dsx1LineLoop The received signal at this interface does not go through the device (minimum penetration) but is looped back out. dsx1OtherLoop Loopbacks that are not defined here. dsx1InwardLoop The transmitted signal at this interface is looped back and received by the same interface. What is transmitted onto the line is product dependent." ::= { dsx1ConfigEntry 9 } dsx1LineStatus OBJECT-TYPE SYNTAX INTEGER (1..131071) MAX-ACCESS read-only STATUS current DESCRIPTION "This variable indicates the Line Status of the interface. It contains loopback, failure, re- ceived 'alarm' and transmitted 'alarms infor- mation. The dsx1LineStatus is a bit map represented as a sum, Expires August 1996 [Page 26] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 therefore, it can represent multiple failures (alarms) and a LoopbackState simultaneously. dsx1NoAlarm should be set if and only if no other flag is set. If the dsx1loopbackState bit is set, the loopback in ef- fect can be determined from the dsx1loopbackConfig object. The various bit positions are: 1 dsx1NoAlarm No alarm present 2 dsx1RcvFarEndLOF Far end LOF (a.k.a., Yellow Alarm) 4 dsx1XmtFarEndLOF Near end sending LOF Indication 8 dsx1RcvAIS Far end sending AIS 16 dsx1XmtAIS Near end sending AIS 32 dsx1LossOfFrame Near end LOF (a.k.a., Red Alarm) 64 dsx1LossOfSignal Near end Loss Of Signal 128 dsx1LoopbackState Near end is looped 256 dsx1T16AIS E1 TS16 AIS 512 dsx1RcvFarEndLOMF Far End Sending TS16 LOMF 1024 dsx1XmtFarEndLOMF Near End Sending TS16 LOMF 2048 dsx1RcvTestCode Near End detects a test code 4096 dsx1OtherFailure any line status not defined here 8192 dsx1UnavailSigState Near End in Unavailable Signal State 16384 dsx1NetEquipOOS Carrier Equipment Out of Service 32768 dsx1RcvPayloadAIS DS2 Payload AIS 65536 dsx1Ds2PerfThreshold DS2 Performance Threshold Exceeded" ::= { dsx1ConfigEntry 10 } dsx1SignalMode OBJECT-TYPE SYNTAX INTEGER { none (1), robbedBit (2), bitOriented (3), messageOriented (4), other (5) } MAX-ACCESS read-write STATUS current DESCRIPTION "'none' indicates that no bits are reserved for signaling on this channel. Expires August 1996 [Page 27] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 'robbedBit' indicates that DS1 Robbed Bit Sig- naling is in use. 'bitOriented' indicates that E1 Channel Asso- ciated Signaling is in use. 'messageOriented' indicates that Common Chan- nel Signaling is in use either on channel 16 of an E1 link or channel 24 of a DS1." ::= { dsx1ConfigEntry 11 } dsx1TransmitClockSource OBJECT-TYPE SYNTAX INTEGER { loopTiming(1), localTiming(2), throughTiming(3) } MAX-ACCESS read-write STATUS current DESCRIPTION "The source of Transmit Clock. 'loopTiming' indicates that the recovered re- ceive clock is used as the transmit clock. 'localTiming' indicates that a local clock source is used. 'throughTiming' indicates that recovered re- ceive clock from another interface is used as the transmit clock." ::= { dsx1ConfigEntry 12 } dsx1Fdl OBJECT-TYPE SYNTAX INTEGER (1..15) MAX-ACCESS read-write STATUS current DESCRIPTION "This bitmap describes the use of the facili- ties data link, and is the sum of the capabili- ties. Set any bits that are appropriate: other(1), dsx1Ansi-T1-403(2), dsx1Att-54016(4), dsx1Fdl-none(8) Expires August 1996 [Page 28] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 'other' indicates that a protocol other than one following is used. 'dsx1Ansi-T1-403' refers to the FDL exchange recommended by ANSI. 'dsx1Att-54016' refers to ESF FDL exchanges. 'dsx1Fdl-none' indicates that the device does not use the FDL." ::= { dsx1ConfigEntry 13 } dsx1InvalidIntervals OBJECT-TYPE SYNTAX INTEGER (0..96) MAX-ACCESS read-only STATUS current DESCRIPTION "The number of intervals for which no valid data is available." ::= { dsx1ConfigEntry 14 } dsx1LineLength OBJECT-TYPE SYNTAX INTEGER (0..64000) MAX-ACCESS read-only STATUS current DESCRIPTION "The length of the ds1 line in meters." ::= { dsx1ConfigEntry 15 } dsx1LineStatusLastChange OBJECT-TYPE SYNTAX TimeStamp MAX-ACCESS read-only STATUS current DESCRIPTION "The value of MIB II's sysUpTime object at the time this DS1 entered its current line status state. If the current state was entered prior to the last re-initialization of the proxy-agent, then this object contains a zero value." ::= { dsx1ConfigEntry 16 } Expires August 1996 [Page 29] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 dsx1LineStatusChangeTrapEnable OBJECT-TYPE SYNTAX INTEGER { enabled(1), disabled(2) } MAX-ACCESS read-write STATUS current DESCRIPTION "Indicates whether dsx1LineStatusChange traps should be generated for this interface. By default, this object should have the value disabled(2)." ::= { dsx1ConfigEntry 17 } Expires August 1996 [Page 30] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 -- the DS1 Current Table -- The DS1 current table contains various statistics being -- collected for the current 15 minute interval. dsx1CurrentTable OBJECT-TYPE SYNTAX SEQUENCE OF Dsx1CurrentEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "The DS1 Current table." ::= { ds1 7 } dsx1CurrentEntry OBJECT-TYPE SYNTAX Dsx1CurrentEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "An entry in the DS1 Current table." INDEX { dsx1CurrentIndex } ::= { dsx1CurrentTable 1 } Dsx1CurrentEntry ::= SEQUENCE { dsx1CurrentIndex INTEGER, dsx1CurrentESs Gauge32, dsx1CurrentSESs Gauge32, dsx1CurrentSEFSs Gauge32, dsx1CurrentUASs Gauge32, dsx1CurrentCSSs Gauge32, dsx1CurrentPCVs Gauge32, dsx1CurrentLESs Gauge32, dsx1CurrentBESs Gauge32, dsx1CurrentDMs Gauge32, Expires August 1996 [Page 31] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 dsx1CurrentLCVs Gauge32 } dsx1CurrentIndex OBJECT-TYPE SYNTAX INTEGER (1..'7fffffff'h) MAX-ACCESS read-only STATUS current DESCRIPTION "The index value which uniquely identifies the DS1 interface to which this entry is applica- ble. The interface identified by a particular value of this index is the same interface as identified by the same value as a dsx1LineIndex object instance." ::= { dsx1CurrentEntry 1 } dsx1CurrentESs OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of Errored Seconds, encountered by a DS1 interface in the current 15 minute inter- val. noSuchInstance will be returned if no data is available." ::= { dsx1CurrentEntry 2 } dsx1CurrentSESs OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of Severely Errored Seconds encoun- tered by a DS1 interface in the current 15 minute interval. noSuchInstance will be returned if no data is available." ::= { dsx1CurrentEntry 3 } dsx1CurrentSEFSs OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only Expires August 1996 [Page 32] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 STATUS current DESCRIPTION "The number of Severely Errored Framing Seconds encountered by a DS1 interface in the current 15 minute interval. noSuchInstance will be returned if no data is available." ::= { dsx1CurrentEntry 4 } dsx1CurrentUASs OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of Unavailable Seconds encountered by a DS1 interface in the current 15 minute in- terval. noSuchInstance will be returned if no data is available." ::= { dsx1CurrentEntry 5 } dsx1CurrentCSSs OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of Controlled Slip Seconds encoun- tered by a DS1 interface in the current 15 minute interval. noSuchInstance will be returned if no data is available." ::= { dsx1CurrentEntry 6 } dsx1CurrentPCVs OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of Path Coding Violations encoun- tered by a DS1 interface in the current 15 minute interval. noSuchInstance will be returned if no data is available." ::= { dsx1CurrentEntry 7 } Expires August 1996 [Page 33] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 dsx1CurrentLESs OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of Line Errored Seconds encountered by a DS1 interface in the current 15 minute in- terval. noSuchInstance will be returned if no data is available." ::= { dsx1CurrentEntry 8 } dsx1CurrentBESs OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of Bursty Errored Seconds (BESs) encountered by a DS1 interface in the current 15 minute interval. noSuchInstance will be returned if no data is available." ::= {dsx1CurrentEntry 9 } dsx1CurrentDMs OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of Degraded Minutes (DMs) encoun- tered by a DS1 interface in the current 15 minute interval. noSuchInstance will be returned if no data is available." ::= { dsx1CurrentEntry 10 } dsx1CurrentLCVs OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of Line Code Violations (LCVs) en- countered by a DS1 interface in the current 15 minute interval. noSuchInstance will be returned if no data is available." Expires August 1996 [Page 34] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 ::= {dsx1CurrentEntry 11 } Expires August 1996 [Page 35] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 -- the DS1 Interval Table -- The DS1 Interval Table contains various statistics -- collected by each DS1 Interface over the previous 24 hours of -- operation. The past 24 hours are broken into 96 completed -- 15 minute intervals. dsx1IntervalTable OBJECT-TYPE SYNTAX SEQUENCE OF Dsx1IntervalEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "The DS1 Interval table." ::= { ds1 8 } dsx1IntervalEntry OBJECT-TYPE SYNTAX Dsx1IntervalEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "An entry in the DS1 Interval table." INDEX { dsx1IntervalIndex, dsx1IntervalNumber } ::= { dsx1IntervalTable 1 } Dsx1IntervalEntry ::= SEQUENCE { dsx1IntervalIndex INTEGER, dsx1IntervalNumber INTEGER, dsx1IntervalESs Gauge32, dsx1IntervalSESs Gauge32, dsx1IntervalSEFSs Gauge32, dsx1IntervalUASs Gauge32, dsx1IntervalCSSs Gauge32, dsx1IntervalPCVs Gauge32, dsx1IntervalLESs Gauge32, Expires August 1996 [Page 36] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 dsx1IntervalBESs Gauge32, dsx1IntervalDMs Gauge32, dsx1IntervalLCVs Gauge32, dsx1IntervalValidData INTEGER } dsx1IntervalIndex OBJECT-TYPE SYNTAX INTEGER (1..'7fffffff'h) MAX-ACCESS read-only STATUS current DESCRIPTION "The index value which uniquely identifies the DS1 interface to which this entry is applica- ble. The interface identified by a particular value of this index is the same interface as identified by the same value as a dsx1LineIndex object instance." ::= { dsx1IntervalEntry 1 } dsx1IntervalNumber OBJECT-TYPE SYNTAX INTEGER (1..96) MAX-ACCESS read-only STATUS current DESCRIPTION "A number between 1 and 96, where 1 is the most recently completed 15 minute interval and 96 is the 15 minutes interval completed 23 hours and 45 minutes prior to interval 1." ::= { dsx1IntervalEntry 2 } dsx1IntervalESs OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of Errored Seconds encountered by a DS1 interface in one of the previous 96, indi- vidual 15 minute, intervals. In the case where the agent is a proxy and valid data is not Expires August 1996 [Page 37] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 available, return noSuchInstance." ::= { dsx1IntervalEntry 3 } dsx1IntervalSESs OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of Severely Errored Seconds encoun- tered by a DS1 interface in one of the previous 96, individual 15 minute, intervals. In the case where the agent is a proxy and valid data is not available, return noSuchInstance." ::= { dsx1IntervalEntry 4 } dsx1IntervalSEFSs OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of Severely Errored Framing Seconds encountered by a DS1 interface in one of the previous 96, individual 15 minute, intervals. In the case where the agent is a proxy and valid data is not available, return noSuchInstance." ::= { dsx1IntervalEntry 5 } dsx1IntervalUASs OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of Unavailable Seconds encountered by a DS1 interface in one of the previous 96, individual 15 minute, intervals. In the case where the agent is a proxy and valid data is not available, return noSuchInstance. This object may decrease if the occurance of unavailable seconds occurs across an inteval boundary." ::= { dsx1IntervalEntry 6 } Expires August 1996 [Page 38] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 dsx1IntervalCSSs OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of Controlled Slip Seconds encoun- tered by a DS1 interface in one of the previous 96, individual 15 minute, intervals. In the case where the agent is a proxy and valid data is not available, return noSuchInstance." ::= { dsx1IntervalEntry 7 } dsx1IntervalPCVs OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of Path Coding Violations encoun- tered by a DS1 interface in one of the previous 96, individual 15 minute, intervals. In the case where the agent is a proxy and valid data is not available, return noSuchInstance." ::= { dsx1IntervalEntry 8 } dsx1IntervalLESs OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of Line Errored Seconds encountered by a DS1 interface in one of the previous 96, individual 15 minute, intervals. In the case where the agent is a proxy and valid data is not available, return noSuchInstance." ::= { dsx1IntervalEntry 9 } dsx1IntervalBESs OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of Bursty Errored Seconds (BESs) Expires August 1996 [Page 39] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 encountered by a DS1 interface in one of the previous 96, individual 15 minute, intervals. In the case where the agent is a proxy and valid data is not available, return noSuchInstance." ::= {dsx1IntervalEntry 10 } dsx1IntervalDMs OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of Degraded Minutes (DMs) encoun- tered by a DS1 interface in one of the previous 96, individual 15 minute, intervals. In the case where the agent is a proxy and valid data is not available, return noSuchInstance." ::= { dsx1IntervalEntry 11 } dsx1IntervalLCVs OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of Line Code Violations (LCVs) en- countered by a DS1 interface in the current 15 minute interval. In the case where the agent is a proxy and valid data is not available, return noSuchInstance." ::= {dsx1IntervalEntry 12 } dsx1IntervalValidData OBJECT-TYPE SYNTAX INTEGER { true(1), false(2) } MAX-ACCESS read-only STATUS current DESCRIPTION "This variable indicates if there is valid data for this interval. A value of true(1) indicates the data is valid." ::= {dsx1IntervalEntry 13 } Expires August 1996 [Page 40] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 -- the DS1 Total -- The DS1 Total Table contains the cumulative sum of the -- various statistics for the 24 hour period preceding the -- current interval. dsx1TotalTable OBJECT-TYPE SYNTAX SEQUENCE OF Dsx1TotalEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "The DS1 Total table. 24 hour interval." ::= { ds1 9 } dsx1TotalEntry OBJECT-TYPE SYNTAX Dsx1TotalEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "An entry in the DS1 Total table." INDEX { dsx1TotalIndex } ::= { dsx1TotalTable 1 } Dsx1TotalEntry ::= SEQUENCE { dsx1TotalIndex INTEGER, dsx1TotalESs Gauge32, dsx1TotalSESs Gauge32, dsx1TotalSEFSs Gauge32, dsx1TotalUASs Gauge32, dsx1TotalCSSs Gauge32, dsx1TotalPCVs Gauge32, dsx1TotalLESs Gauge32, dsx1TotalBESs Gauge32, dsx1TotalDMs Expires August 1996 [Page 41] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 Gauge32, dsx1TotalLCVs Gauge32 } dsx1TotalIndex OBJECT-TYPE SYNTAX INTEGER (1..'7fffffff'h) MAX-ACCESS read-only STATUS current DESCRIPTION "The index value which uniquely identifies the DS1 interface to which this entry is applica- ble. The interface identified by a particular value of this index is the same interface as identified by the same value as a dsx1LineIndex object instance." ::= { dsx1TotalEntry 1 } dsx1TotalESs OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only STATUS current DESCRIPTION "The sum of Errored Seconds encountered by a DS1 interface in the previous 24 hour interval. Invalid 15 minute intervals count as 0." ::= { dsx1TotalEntry 2 } dsx1TotalSESs OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of Severely Errored Seconds encoun- tered by a DS1 interface in the previous 24 hour interval. Invalid 15 minute intervals count as 0." ::= { dsx1TotalEntry 3 } dsx1TotalSEFSs OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only Expires August 1996 [Page 42] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 STATUS current DESCRIPTION "The number of Severely Errored Framing Seconds encountered by a DS1 interface in the previous 24 hour interval. Invalid 15 minute intervals count as 0." ::= { dsx1TotalEntry 4 } dsx1TotalUASs OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of Unavailable Seconds encountered by a DS1 interface in the previous 24 hour in- terval. Invalid 15 minute intervals count as 0." ::= { dsx1TotalEntry 5 } dsx1TotalCSSs OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of Controlled Slip Seconds encoun- tered by a DS1 interface in the previous 24 hour interval. Invalid 15 minute intervals count as 0." ::= { dsx1TotalEntry 6 } dsx1TotalPCVs OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of Path Coding Violations encoun- tered by a DS1 interface in the previous 24 hour interval. Invalid 15 minute intervals count as 0." ::= { dsx1TotalEntry 7 } dsx1TotalLESs OBJECT-TYPE Expires August 1996 [Page 43] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 SYNTAX Gauge32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of Line Errored Seconds encountered by a DS1 interface in the previous 24 hour in- terval. Invalid 15 minute intervals count as 0." ::= { dsx1TotalEntry 8 } dsx1TotalBESs OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of Bursty Errored Seconds (BESs) encountered by a DS1 interface in the previous 24 hour interval. Invalid 15 minute intervals count as 0." ::= { dsx1TotalEntry 9 } dsx1TotalDMs OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of Degraded Minutes (DMs) encoun- tered by a DS1 interface in the previous 24 hour interval. Invalid 15 minute intervals count as 0." ::= { dsx1TotalEntry 10 } dsx1TotalLCVs OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of Line Code Violations (LCVs) en- countered by a DS1 interface in the current 15 minute interval. Invalid 15 minute intervals count as 0." ::= {dsx1TotalEntry 11 } Expires August 1996 [Page 44] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 -- The DS1 Far End Group -- Implementation of this group is optional for all systems -- that attach to a DS1 Interface. -- The DS1 Far End Group consists of three tables: -- DS1 Far End Current -- DS1 Far End Interval -- DS1 Far End Total -- The DS1 Far End Current Table -- The DS1 Far End Current table contains various statistics -- being collected for the current 15 minute interval. -- The statistics are collected from the far end messages on the -- Facilities Data Link. The definitions are the same as -- described for the near-end information. dsx1FarEndCurrentTable OBJECT-TYPE SYNTAX SEQUENCE OF Dsx1FarEndCurrentEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "The DS1 Far End Current table." ::= { ds1 10 } dsx1FarEndCurrentEntry OBJECT-TYPE SYNTAX Dsx1FarEndCurrentEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "An entry in the DS1 Far End Current table." INDEX { dsx1FarEndCurrentIndex } ::= { dsx1FarEndCurrentTable 1 } Dsx1FarEndCurrentEntry ::= SEQUENCE { dsx1FarEndCurrentIndex INTEGER, dsx1FarEndTimeElapsed INTEGER, dsx1FarEndValidIntervals INTEGER, dsx1FarEndCurrentESs Expires August 1996 [Page 45] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 Gauge32, dsx1FarEndCurrentSESs Gauge32, dsx1FarEndCurrentSEFSs Gauge32, dsx1FarEndCurrentUASs Gauge32, dsx1FarEndCurrentCSSs Gauge32, dsx1FarEndCurrentLESs Gauge32, dsx1FarEndCurrentPCVs Gauge32, dsx1FarEndCurrentBESs Gauge32, dsx1FarEndCurrentDMs Gauge32, dsx1FarEndInvalidIntervals INTEGER } dsx1FarEndCurrentIndex OBJECT-TYPE SYNTAX INTEGER (1..'7fffffff'h) MAX-ACCESS read-only STATUS current DESCRIPTION "The index value which uniquely identifies the DS1 interface to which this entry is applica- ble. The interface identified by a particular value of this index is the same interface as identified by the same value an dsx1LineIndex object instance." ::= { dsx1FarEndCurrentEntry 1 } dsx1FarEndTimeElapsed OBJECT-TYPE SYNTAX INTEGER (0..899) MAX-ACCESS read-only STATUS current DESCRIPTION "The number of seconds that have elapsed since the beginning of the far end current error-measurement period." ::= { dsx1FarEndCurrentEntry 2 } Expires August 1996 [Page 46] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 dsx1FarEndValidIntervals OBJECT-TYPE SYNTAX INTEGER (0..96) MAX-ACCESS read-only STATUS current DESCRIPTION "The number of previous far end intervals for which valid data was collected. The value will be 96 unless the interface was brought online within the last 24 hours, in which case the value will be the number of complete 15 minute far end intervals since the interface has been online." ::= { dsx1FarEndCurrentEntry 3 } dsx1FarEndCurrentESs OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of Far Far End Errored Seconds en- countered by a DS1 interface in the current 15 minute interval. noSuchInstance will be returned if no data is available." ::= { dsx1FarEndCurrentEntry 4 } dsx1FarEndCurrentSESs OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of Far End Severely Errored Seconds encountered by a DS1 interface in the current 15 minute interval. noSuchInstance will be returned if no data is available." ::= { dsx1FarEndCurrentEntry 5 } dsx1FarEndCurrentSEFSs OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of Far End Severely Errored Framing Expires August 1996 [Page 47] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 Seconds encountered by a DS1 interface in the current 15 minute interval. noSuchInstance will be returned if no data is available." ::= { dsx1FarEndCurrentEntry 6 } dsx1FarEndCurrentUASs OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of Unavailable Seconds encountered by a DS1 interface in the current 15 minute in- terval. noSuchInstance will be returned if no data is available." ::= { dsx1FarEndCurrentEntry 7 } dsx1FarEndCurrentCSSs OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of Far End Controlled Slip Seconds encountered by a DS1 interface in the current 15 minute interval. noSuchInstance will be returned if no data is available." ::= { dsx1FarEndCurrentEntry 8 } dsx1FarEndCurrentLESs OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of Far End Line Errored Seconds en- countered by a DS1 interface in the current 15 minute interval. noSuchInstance will be returned if no data is available." ::= { dsx1FarEndCurrentEntry 9 } dsx1FarEndCurrentPCVs OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only Expires August 1996 [Page 48] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 STATUS current DESCRIPTION "The number of Far End Path Coding Violations reported via the far end block error count en- countered by a DS1 interface in the current 15 minute interval. noSuchInstance will be returned if no data is available." ::= { dsx1FarEndCurrentEntry 10 } dsx1FarEndCurrentBESs OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of Bursty Errored Seconds (BESs) encountered by a DS1 interface in the current 15 minute interval. noSuchInstance will be returned if no data is available." ::= {dsx1FarEndCurrentEntry 11 } dsx1FarEndCurrentDMs OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of Degraded Minutes (DMs) encoun- tered by a DS1 interface in the current 15 minute interval. noSuchInstance will be returned if no data is available." ::= { dsx1FarEndCurrentEntry 12 } dsx1FarEndInvalidIntervals OBJECT-TYPE SYNTAX INTEGER (0..96) MAX-ACCESS read-only STATUS current DESCRIPTION "The number of intervals for which no valid data is available." ::= { dsx1FarEndCurrentEntry 13 } -- The DS1 Far End Interval Table -- The DS1 Far End Interval Table contains various statistics Expires August 1996 [Page 49] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 -- collected by each DS1 interface over the previous 24 hours of -- operation. The past 24 hours are broken into 96 -- completed 15 minute intervals. dsx1FarEndIntervalTable OBJECT-TYPE SYNTAX SEQUENCE OF Dsx1FarEndIntervalEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "The DS1 Far End Interval table." ::= { ds1 11 } dsx1FarEndIntervalEntry OBJECT-TYPE SYNTAX Dsx1FarEndIntervalEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "An entry in the DS1 Far End Interval table." INDEX { dsx1FarEndIntervalIndex, dsx1FarEndIntervalNumber } ::= { dsx1FarEndIntervalTable 1 } Dsx1FarEndIntervalEntry ::= SEQUENCE { dsx1FarEndIntervalIndex INTEGER, dsx1FarEndIntervalNumber INTEGER, dsx1FarEndIntervalESs Gauge32, dsx1FarEndIntervalSESs Gauge32, dsx1FarEndIntervalSEFSs Gauge32, dsx1FarEndIntervalUASs Gauge32, dsx1FarEndIntervalCSSs Gauge32, dsx1FarEndIntervalLESs Gauge32, dsx1FarEndIntervalPCVs Gauge32, dsx1FarEndIntervalBESs Gauge32, Expires August 1996 [Page 50] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 dsx1FarEndIntervalDMs Gauge32 } dsx1FarEndIntervalIndex OBJECT-TYPE SYNTAX INTEGER (1..'7fffffff'h) MAX-ACCESS read-only STATUS current DESCRIPTION "The index value which uniquely identifies the DS1 interface to which this entry is applica- ble. The interface identified by a particular value of this index is the same interface as identified by the same value as a dsx1LineIndex object instance." ::= { dsx1FarEndIntervalEntry 1 } dsx1FarEndIntervalNumber OBJECT-TYPE SYNTAX INTEGER (1..96) MAX-ACCESS read-only STATUS current DESCRIPTION "A number between 1 and 96, where 1 is the most recently completed 15 minute interval and 96 is the 15 minutes interval completed 23 hours and 45 minutes prior to interval 1." ::= { dsx1FarEndIntervalEntry 2 } dsx1FarEndIntervalESs OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of Far End Errored Seconds encoun- tered by a DS1 interface in one of the previous 96, individual 15 minute, intervals. In the case where the agent is a proxy and valid data is not available, return noSuchInstance." ::= { dsx1FarEndIntervalEntry 3 } dsx1FarEndIntervalSESs OBJECT-TYPE SYNTAX Gauge32 Expires August 1996 [Page 51] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of Far End Severely Errored Seconds encountered by a DS1 interface in one of the previous 96, individual 15 minute, intervals. In the case where the agent is a proxy and valid data is not available, return noSuchInstance." ::= { dsx1FarEndIntervalEntry 4 } dsx1FarEndIntervalSEFSs OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of Far End Severely Errored Framing Seconds encountered by a DS1 interface in one of the previous 96, individual 15 minute, in- tervals. In the case where the agent is a proxy and valid data is not available, return noSuchInstance." ::= { dsx1FarEndIntervalEntry 5 } dsx1FarEndIntervalUASs OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of Unavailable Seconds encountered by a DS1 interface in one of the previous 96, individual 15 minute, intervals. In the case where the agent is a proxy and valid data is not available, return noSuchInstance." ::= { dsx1FarEndIntervalEntry 6 } dsx1FarEndIntervalCSSs OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of Far End Controlled Slip Seconds encountered by a DS1 interface in one of the Expires August 1996 [Page 52] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 previous 96, individual 15 minute, intervals. In the case where the agent is a proxy and valid data is not available, return noSuchInstance." ::= { dsx1FarEndIntervalEntry 7 } dsx1FarEndIntervalLESs OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of Far End Line Errored Seconds en- countered by a DS1 interface in one of the pre- vious 96, individual 15 minute, intervals. In the case where the agent is a proxy and valid data is not available, return noSuchInstance." ::= { dsx1FarEndIntervalEntry 8 } dsx1FarEndIntervalPCVs OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of Far End Path Coding Violations reported via the far end block error count en- countered by a DS1 interface in one of the pre- vious 96, individual 15 minute, intervals. In the case where the agent is a proxy and valid data is not available, return noSuchInstance." ::= { dsx1FarEndIntervalEntry 9 } dsx1FarEndIntervalBESs OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of Bursty Errored Seconds (BESs) encountered by a DS1 interface in one of the previous 96, individual 15 minute, intervals. In the case where the agent is a proxy and valid data is not available, return noSuchInstance." ::= {dsx1FarEndIntervalEntry 10 } Expires August 1996 [Page 53] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 dsx1FarEndIntervalDMs OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of Degraded Minutes (DMs) encoun- tered by a DS1 interface in one of the previous 96, individual 15 minute, intervals. In the case where the agent is a proxy and valid data is not available, return noSuchInstance." ::= { dsx1FarEndIntervalEntry 11 } -- The DS1 Far End Total Table -- The DS1 Far End Total Table contains the cumulative sum of the -- various statistics for the 24 hour period preceding the -- current interval. dsx1FarEndTotalTable OBJECT-TYPE SYNTAX SEQUENCE OF Dsx1FarEndTotalEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "The DS1 Far End Total table." ::= { ds1 12 } dsx1FarEndTotalEntry OBJECT-TYPE SYNTAX Dsx1FarEndTotalEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "An entry in the DS1 Far End Total table." INDEX { dsx1FarEndTotalIndex } ::= { dsx1FarEndTotalTable 1 } Dsx1FarEndTotalEntry ::= SEQUENCE { dsx1FarEndTotalIndex INTEGER, dsx1FarEndTotalESs Gauge32, dsx1FarEndTotalSESs Gauge32, Expires August 1996 [Page 54] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 dsx1FarEndTotalSEFSs Gauge32, dsx1FarEndTotalUASs Gauge32, dsx1FarEndTotalCSSs Gauge32, dsx1FarEndTotalLESs Gauge32, dsx1FarEndTotalPCVs Gauge32, dsx1FarEndTotalBESs Gauge32, dsx1FarEndTotalDMs Gauge32 } dsx1FarEndTotalIndex OBJECT-TYPE SYNTAX INTEGER (1..'7fffffff'h) MAX-ACCESS read-only STATUS current DESCRIPTION "The index value which uniquely identifies the DS1 interface to which this entry is applica- ble. The interface identified by a particular value of this index is the same interface as identified by the same value an dsx1LineIndex object instance." ::= { dsx1FarEndTotalEntry 1 } dsx1FarEndTotalESs OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of Far End Errored Seconds encoun- tered by a DS1 interface in the previous 24 hour interval. Invalid 15 minute intervals count as 0." ::= { dsx1FarEndTotalEntry 2 } dsx1FarEndTotalSESs OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only Expires August 1996 [Page 55] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 STATUS current DESCRIPTION "The number of Far End Severely Errored Seconds encountered by a DS1 interface in the previous 24 hour interval. Invalid 15 minute intervals count as 0." ::= { dsx1FarEndTotalEntry 3 } dsx1FarEndTotalSEFSs OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of Far End Severely Errored Framing Seconds encountered by a DS1 interface in the previous 24 hour interval. Invalid 15 minute intervals count as 0." ::= { dsx1FarEndTotalEntry 4 } dsx1FarEndTotalUASs OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of Unavailable Seconds encountered by a DS1 interface in the previous 24 hour in- terval. Invalid 15 minute intervals count as 0." ::= { dsx1FarEndTotalEntry 5 } dsx1FarEndTotalCSSs OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of Far End Controlled Slip Seconds encountered by a DS1 interface in the previous 24 hour interval. Invalid 15 minute intervals count as 0." ::= { dsx1FarEndTotalEntry 6 } Expires August 1996 [Page 56] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 dsx1FarEndTotalLESs OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of Far End Line Errored Seconds en- countered by a DS1 interface in the previous 24 hour interval. Invalid 15 minute intervals count as 0." ::= { dsx1FarEndTotalEntry 7 } dsx1FarEndTotalPCVs OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of Far End Path Coding Violations reported via the far end block error count en- countered by a DS1 interface in the previous 24 hour interval. Invalid 15 minute intervals count as 0." ::= { dsx1FarEndTotalEntry 8 } dsx1FarEndTotalBESs OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of Bursty Errored Seconds (BESs) encountered by a DS1 interface in the previous 24 hour interval. Invalid 15 minute intervals count as 0." ::= { dsx1FarEndTotalEntry 9 } dsx1FarEndTotalDMs OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of Degraded Minutes (DMs) encoun- tered by a DS1 interface in the previous 24 hour interval. Invalid 15 minute intervals Expires August 1996 [Page 57] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 count as 0." ::= { dsx1FarEndTotalEntry 10 } Expires August 1996 [Page 58] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 -- the DS1 Fractional Group -- This group is deprecated. It was mandatory for -- systems dividing a DS1 into channels containing different -- data streams that are of local interest. Systems which -- are indifferent to data content, such as CSUs, need not -- implement it. -- The DS1 fractional table identifies which DS1 channels -- associated with a CSU are being used to support a -- logical interface, i.e., an entry in the interfaces table -- from the Internet-standard MIB. -- For example, consider an application managing a North -- American ISDN Primary Rate link whose division is a 384 kbit/s -- H1 "B" Channel for Video, a second H1 for data to a primary -- routing peer, and 12 64 kbit/s H0 "B" Channels. Consider that -- some subset of the H0 channels are used for voice and the -- remainder are available for dynamic data calls. -- we count a total of 14 interfaces multiplexed onto the DS1 -- interface. Six DS1 channels (for the sake of the example, -- channels 1..6) are used for Video, six more (7..11 and 13) -- are used for data, and the remaining 12 are are in channels -- 12 and 14..24. -- Let us further imagine that ifIndex 2 is of type DS1 and -- refers to the DS1 interface, and that the interfaces layered -- onto it are numbered 3..16. -- We might describe the allocation of channels, in the -- dsx1FracTable, as follows: -- dsx1FracIfIndex.2. 1 = 3 dsx1FracIfIndex.2.13 = 4 -- dsx1FracIfIndex.2. 2 = 3 dsx1FracIfIndex.2.14 = 6 -- dsx1FracIfIndex.2. 3 = 3 dsx1FracIfIndex.2.15 = 7 -- dsx1FracIfIndex.2. 4 = 3 dsx1FracIfIndex.2.16 = 8 -- dsx1FracIfIndex.2. 5 = 3 dsx1FracIfIndex.2.17 = 9 -- dsx1FracIfIndex.2. 6 = 3 dsx1FracIfIndex.2.18 = 10 -- dsx1FracIfIndex.2. 7 = 4 dsx1FracIfIndex.2.19 = 11 -- dsx1FracIfIndex.2. 8 = 4 dsx1FracIfIndex.2.20 = 12 -- dsx1FracIfIndex.2. 9 = 4 dsx1FracIfIndex.2.21 = 13 -- dsx1FracIfIndex.2.10 = 4 dsx1FracIfIndex.2.22 = 14 -- dsx1FracIfIndex.2.11 = 4 dsx1FracIfIndex.2.23 = 15 -- dsx1FracIfIndex.2.12 = 5 dsx1FracIfIndex.2.24 = 16 Expires August 1996 [Page 59] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 -- For North American (DS1) interfaces, there are 24 legal -- channels, numbered 1 through 24. -- For G.704 interfaces, there are 31 legal channels, -- numbered 1 through 31. The channels (1..31) correspond -- directly to the equivalently numbered time-slots. dsx1FracTable OBJECT-TYPE SYNTAX SEQUENCE OF Dsx1FracEntry MAX-ACCESS not-accessible STATUS deprecated DESCRIPTION "The DS1 Fractional table." ::= { ds1 13 } dsx1FracEntry OBJECT-TYPE SYNTAX Dsx1FracEntry MAX-ACCESS not-accessible STATUS deprecated DESCRIPTION "An entry in the DS1 Fractional table." INDEX { dsx1FracIndex, dsx1FracNumber } ::= { dsx1FracTable 1 } Dsx1FracEntry ::= SEQUENCE { dsx1FracIndex INTEGER, dsx1FracNumber INTEGER, dsx1FracIfIndex INTEGER } dsx1FracIndex OBJECT-TYPE SYNTAX INTEGER (1..'7fffffff'h) MAX-ACCESS read-only STATUS deprecated DESCRIPTION "The index value which uniquely identifies the DS1 interface to which this entry is applicable The interface identified by a particular value of this index is the same interface as Expires August 1996 [Page 60] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 identified by the same value an dsx1LineIndex object instance." ::= { dsx1FracEntry 1 } dsx1FracNumber OBJECT-TYPE SYNTAX INTEGER (1..31) MAX-ACCESS read-only STATUS deprecated DESCRIPTION "The channel number for this entry." ::= { dsx1FracEntry 2 } dsx1FracIfIndex OBJECT-TYPE SYNTAX INTEGER (1..'7fffffff'h) MAX-ACCESS read-write STATUS deprecated DESCRIPTION "An index value that uniquely identifies an interface. The interface identified by a particular value of this index is the same interface as identified by the same value an ifIndex object instance. If no interface is currently using a channel, the value should be zero. If a single interface occupies more than one time slot, that ifIndex value will be found in multiple time slots." ::= { dsx1FracEntry 3 } Expires August 1996 [Page 61] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 -- conformance information ds1Conformance OBJECT IDENTIFIER ::= { ds1 14 } ds1Groups OBJECT IDENTIFIER ::= { ds1Conformance 1 } ds1Compliances OBJECT IDENTIFIER ::= { ds1Conformance 2 } -- compliance statements ds1Compliance MODULE-COMPLIANCE STATUS current DESCRIPTION "The compliance statement for DS1 interfaces." MODULE -- this module MANDATORY-GROUPS { ds1NearEndConfigGroup, ds1NearEndCurrentGroup, ds1NearEndIntervalGroup, ds1NearEndTotalGroup } GROUP ds1FarEndGroup DESCRIPTION "Implementation of this group is optional for all systems that attach to a DS1 Interface." GROUP ds1NearEndOptionalConfigGroup DESCRIPTION "Implementation of this group is optional for all systems that attach to a DS1 Interface." GROUP ds1DS2Group DESCRIPTION "Implementation of this group is mandatory for all systems that attach to a DS2 Interface." ::= { ds1Compliances 1 } -- units of conformance ds1NearEndConfigGroup OBJECT-GROUP OBJECTS { dsx1TimeElapsed, dsx1ValidIntervals, dsx1LineType, dsx1LineCoding, dsx1SendCode, dsx1CircuitIdentifier, dsx1LoopbackConfig, Expires August 1996 [Page 62] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 dsx1LineStatus, dsx1SignalMode, dsx1TransmitClockSource, dsx1Fdl, dsx1InvalidIntervals, dsx1LineLength } STATUS current DESCRIPTION "A collection of objects providing configuration information applicable to all DS1 interfaces." ::= { ds1Groups 1 } ds1NearEndCurrentGroup OBJECT-GROUP OBJECTS { dsx1CurrentIndex, dsx1CurrentESs, dsx1CurrentSESs, dsx1CurrentSEFSs, dsx1CurrentUASs, dsx1CurrentCSSs, dsx1CurrentPCVs, dsx1CurrentLESs, dsx1CurrentBESs, dsx1CurrentDMs, dsx1CurrentLCVs } STATUS current DESCRIPTION "A collection of objects providing statistics information for the current interval applicable to all DS1 interfaces." ::= { ds1Groups 2 } ds1NearEndIntervalGroup OBJECT-GROUP OBJECTS { dsx1IntervalIndex, dsx1IntervalNumber, dsx1IntervalESs, dsx1IntervalSESs, dsx1IntervalSEFSs, dsx1IntervalUASs, dsx1IntervalCSSs, dsx1IntervalPCVs, dsx1IntervalLESs, dsx1IntervalBESs, dsx1IntervalDMs, dsx1IntervalLCVs, dsx1IntervalValidData } Expires August 1996 [Page 63] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 STATUS current DESCRIPTION "A collection of objects providing statistics information for the last 96 intervals applicable to all DS1 interfaces." ::= { ds1Groups 3 } ds1NearEndTotalGroup OBJECT-GROUP OBJECTS { dsx1TotalIndex, dsx1TotalESs, dsx1TotalSESs, dsx1TotalSEFSs, dsx1TotalUASs, dsx1TotalCSSs, dsx1TotalPCVs, dsx1TotalLESs, dsx1TotalBESs, dsx1TotalDMs, dsx1TotalLCVs } STATUS current DESCRIPTION "A collection of objects providing statistics information for the total of the last 96 intervals applicable to all DS1 interfaces." ::= { ds1Groups 4 } ds1FarEndGroup OBJECT-GROUP OBJECTS { dsx1FarEndCurrentIndex, dsx1FarEndTimeElapsed, dsx1FarEndValidIntervals, dsx1FarEndCurrentESs, dsx1FarEndCurrentSESs, dsx1FarEndCurrentSEFSs, dsx1FarEndCurrentUASs, dsx1FarEndCurrentCSSs, dsx1FarEndCurrentLESs, dsx1FarEndCurrentPCVs, dsx1FarEndCurrentBESs, dsx1FarEndCurrentDMs, dsx1FarEndInvalidIntervals, dsx1FarEndIntervalIndex, dsx1FarEndIntervalNumber, dsx1FarEndIntervalESs, dsx1FarEndIntervalSESs, dsx1FarEndIntervalSEFSs, Expires August 1996 [Page 64] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 dsx1FarEndIntervalUASs, dsx1FarEndIntervalCSSs, dsx1FarEndIntervalLESs, dsx1FarEndIntervalPCVs, dsx1FarEndIntervalBESs, dsx1FarEndIntervalDMs, dsx1FarEndTotalIndex, dsx1FarEndTotalESs, dsx1FarEndTotalSESs, dsx1FarEndTotalSEFSs, dsx1FarEndTotalUASs, dsx1FarEndTotalCSSs, dsx1FarEndTotalLESs, dsx1FarEndTotalPCVs, dsx1FarEndTotalBESs, dsx1FarEndTotalDMs } STATUS current DESCRIPTION "A collection of objects providing remote configuration and statistics information." ::= { ds1Groups 5 } ds1DeprecatedGroup OBJECT-GROUP OBJECTS { dsx1IfIndex, dsx1FracIndex, dsx1FracNumber, dsx1FracIfIndex } STATUS deprecated DESCRIPTION "A collection of obsolete objects that may be implemented for backwards compatibility." ::= { ds1Groups 6 } ds1NearEndOptionalConfigGroup OBJECT-GROUP OBJECTS { dsx1LineStatusLastChange, dsx1LineStatusChangeTrapEnable } STATUS current DESCRIPTION "A collection of objects that may be implemented on DS1 and DS2 interfaces." ::= { ds1Groups 7 } ds1DS2Group OBJECT-GROUP OBJECTS { dsx1LineIndex, Expires August 1996 [Page 65] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 dsx1LineType, dsx1LineCoding, dsx1SendCode, dsx1CircuitIdentifier, dsx1LineStatus, dsx1SignalMode, dsx1TransmitClockSource } STATUS current DESCRIPTION "A collection of objects providing information about DS2 (6,312 kbps) systems." ::= { ds1Groups 8 } ds1TransStatsGroup OBJECT-GROUP OBJECTS { dsx1CurrentESs, dsx1CurrentSESs, dsx1CurrentUASs, dsx1IntervalESs, dsx1IntervalSESs, dsx1IntervalUASs, dsx1TotalESs, dsx1TotalSESs, dsx1TotalUASs } STATUS current DESCRIPTION "A collection of objects which are the statistics which can be collected from a ds1 interface that is running transparent or unframed lineType. Statistics not in this list should return noSuchInstance." ::= { ds1Groups 9 } Expires August 1996 [Page 66] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 -- Ds1 TRAPS ds1Traps OBJECT IDENTIFIER ::= { ds1 15 } dsx1LineStatusChange NOTIFICATION-TYPE OBJECTS { dsx1LineStatus, dsx1LineStatusLastChange } STATUS current DESCRIPTION "A dsx1LineStatusChange trap is sent when the value of an instance dsx1LineStatus changes. It can be utilized by an NMS to trigger polls. When the line status change results from a higher level line status change (i.e. ds3), then no traps for the ds1 are sent." ::= { ds1Traps 1 } END 5. Appendix A - Use of dsx1IfIndex and dsx1LineIndex Different physical configurations for the support of SNMP with DS1 equipment exist. To accommodate these scenarios, two different indices for DS1 interfaces are introduced in this MIB. These indices are dsx1IfIndex and dsx1LineIndex. External interface scenario: the SNMP Agent represents all managed DS1 lines as external interfaces (for example, an Agent residing on the device supporting DS1 interfaces directly): For this scenario, all interfaces are assigned an integer value equal to ifIndex, and the following applies: ifIndex=dsx1IfIndex=dsx1LineIndex for all interfaces. The dsx1IfIndex column of the DS1 Configuration table relates each DS1 interface to its corresponding interface (ifIndex) in the Internet-standard MIB (MIB-II STD 17, RFC1213). External&Internal interface scenario: the SNMP Agents resides on an host external from the device supporting DS1 interfaces (e.g., a Expires August 1996 [Page 67] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 router). The Agent represents both the host and the DS1 device. The index dsx1LineIndex is used to not only represent the DS1 interfaces external from the host/DS1-device combination, but also the DS1 interfaces connecting the host and the DS1 device. The index dsx1IfIndex is always equal to ifIndex. Example: A shelf full of CSUs connected to a Router. An SNMP Agent residing on the router proxies for itself and the CSU. The router has also an Ethernet interface: +-----+ | | | | | | +---------------------+ |E | | 1.544 MBPS | Line#A | DS1 Link |t | R |---------------+ - - - - - - - - - +------> |h | | | | |e | O | 1.544 MBPS | Line#B | DS1 Link |r | |---------------+ - - - - - - - - - - +------> |n | U | | CSU Shelf | |e | | 1.544 MBPS | Line#C | DS1 Link |t | T |---------------+ - - - -- -- - - - - +------> | | | | | |-----| E | 1.544 MBPS | Line#D | DS1 Link | | |---------------+ - - - - -- - - - - +------> | | R | |_____________________| | | | | +-----+ The assignment of the index values could for example be: ifIndex (= dsx1IfIndex) dsx1LineIndex 1 NA NA (Ethernet) 2 Line#A Router Side 6 2 Line#A Network Side 7 3 Line#B Router Side 8 3 Line#B Network Side 9 4 Line#C Router Side 10 4 Line#C Network Side 11 5 Line#D Router Side 12 5 Line#D Network Side 13 For this example, ifNumber is equal to 5. Note the following Expires August 1996 [Page 68] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 description of dsx1LineIndex: the dsx1LineIndex identifies a DS1 Interface on a managed device. If there is an ifEntry that is directly associated with this and only this DS1 interface, it should have the same value as ifIndex. Otherwise, number the dsx1LineIndices with an unique identifier following the rules of choosing a number greater than ifNumber and numbering inside interfaces (e.g., equipment side) with even numbers and outside interfaces (e.g., network side) with odd numbers. If the CSU shelf is managed by itself by a local SNMP Agent, the situation would be: ifIndex (= dsx1IfIndex) dsx1LineIndex 1 Line#A Network Side 1 2 Line#A RouterSide 2 3 Line#B Network Side 3 4 Line#B RouterSide 4 5 Line#C Network Side 5 6 Line#C Router Side 6 7 Line#D Network Side 7 8 Line#D Router Side 8 6. Appendix B - The delay approach to Unavialable Seconds. 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 the one-second statistics through a 10-second delay line prior to updating any counters. That can be done by performing the following steps at the end of each one second interval. i) Read near/far end CV counter and alarm status flags from the hardware. ii) Accumulate the CV counts for the preceding second and compare them to the ES and SES threshold for the layer in question. Update the signal state and shift the one-second CV counts and ES/SES flags into the 10-element Expires August 1996 [Page 69] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 delay line. Note that far-end one-second statistics are to be flagged as "absent" during any second in which there is an incoming defect at the layer in question or at any lower layer. iii) Update the current interval statistics using the signal state from the _previous_ update cycle and the one-second CV counts and ES/SES flags shifted out of the 10-element delay line. This procedure is illustrated below for a SONET interface. Similar rules would apply for DS1 and DS3 interfaces. Note that the procedure guarantees that the statistical counters will be correctly updated at all times, although they will lag real time by 10 seconds. Each 15 minutes one would transfer the current interval counts into the previous interval counts and drop the oldest set of interval counts off the cliff. Note that signal state calculations would _not_ start afresh at each interval boundary; signal state information _would_ be carried across interval boundaries. A scheme similar to this one has been used at least one DS1 product I know of -- the Tektronix/LP COM TC-2000 PCM test set. This product was first put on the market in 1987 and featured G.821 performance statistics collected in the manner shown below. +--------------------------------------------------------------+ | 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| | Expires August 1996 [Page 70] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 | (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 | +--------------------------------------------------------------+ Figure X. Accumulation of SONET/SDH performance statistics. Adopting such a procedure would, however, raise another issue: for the first ten seconds after a system comes up the interface is in an unknown state. It would be necessary to allow for up to ten seconds of dead time during the current interval. Hence the dsx1TimeElapsed, dsx1FarEndTimeElapsed, dsx3TimeElapsed, dsx3FarEndTimeElapsed, and sonetMediumTimeElapsed objects _would_ need to be replaced by objects that allow for the possibility that _no_ valid data has yet been collected for the current interval. Here are some possible replacement objects: dsx1NearEndElapsedTime OBJECT-TYPE SYNTAX INTEGER (0..900) MAX-ACCESS read-only STATUS current DESCRIPTION "The number of seconds, including partial seconds, that have elapsed since the beginning of the current near-end error-measurement period." ::= { dsx1ConfigEntry xxx } Expires August 1996 [Page 71] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 dsx1FarEndElapsedTime OBJECT-TYPE SYNTAX INTEGER (0..900) MAX-ACCESS read-only STATUS current DESCRIPTION "The number of seconds, including partial seconds, that have elapsed since the beginning of the current far-end error-measurement period." ::= { dsx1FarEndCurrentEntry xxx } dsx3NearEndElapsedTime OBJECT-TYPE SYNTAX INTEGER (0..900) MAX-ACCESS read-only STATUS current DESCRIPTION "The number of seconds, including partial seconds, that have elapsed since the beginning of the current near-end error-measurement period." ::= { dsx3ConfigEntry xxx } dsx3FarEndElapsedTime OBJECT-TYPE SYNTAX INTEGER (0..900) MAX-ACCESS read-only STATUS current DESCRIPTION "The number of seconds, including partial seconds, that have elapsed since the beginning of the current far-end error-measurement period." ::= { dsx3FarEndCurrentEntry xxx } sonetMediumElapsedTime OBJECT-TYPE SYNTAX Integer32 (0..900) MAX-ACCESS read-only STATUS current DESCRIPTION "The number of seconds, including partial seconds, that have elapsed since the beginning of the current error-measurement period." ::= { sonetMediumEntry xxx } These objects should assume the value 0 whenever there are no current interval statistics to report. That would happen if the interface Expires August 1996 [Page 72] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 was off-line (e.g., in a disabled or testing state) and (in an implementation which fully complies with ANSI T1.231 UAS definition) during the initial 10-second period after the interface is brought on-line. 7. Acknowledgments This document was produced by the Trunk MIB Working Group: Expires August 1996 [Page 73] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 8. References [1] SNMPv2 Working Group, Case, J., McCloghrie, K., Rose, M., and S. Waldbusser, "Structure of Management Information for Version 2 of the Simple Network Management Protocol (SNMPv2)", RFC 1902, January 1996. [2] McCloghrie, K., and M. Rose, Editors, "Management Information Base for Network Management of TCP/IP-based internets: MIB-II", STD 17, RFC 1213, Hughes LAN Systems, Performance Systems International, March 1991. [3] Case, J., Fedor, M., Schoffstall, M., and J. Davin. " A Simple Network Management Protocol (SNMP)", STD 15, RFC 1157, SNMP Research, Performance Systems International, MIT Lab for Computer Science, May 1990. [4] SNMPv2 Working Group, Case, J., McCloghrie, K., Rose, M., and S. Waldbusser, "Protocol Operations for Version 2 of the Simple Network Management Protocol (SNMPv2)", RFC 1905, January 1996. [5] McCloghrie, K. and F. Kastenholz, "Evolution of the Interfaces Group of MIB-II", RFC 1573, Hughes LAN Systems, FTP Software, January 1994. [6] AT&T Information Systems, AT&T ESF DS1 Channel Service Unit User's Manual, 999-100-305, February 1988. [7] AT&T Technical Reference, Requirements for Interfacing Digital Terminal Equipment to Services Employing the Extended Superframe Format, Publication 54016, May 1988. [8] American National Standard for Telecommunications -- Carrier-to- Customer Installation - DS1 Metallic Interface, T1.403, February 1989. [9] CCITT Specifications Volume III, Recommendation G.703, Physical/Electrical Characteristics of Hierarchical Digital Interfaces, July 1988. [10] CCITT Specifications Volume III, Recommendation G.704, Synchronous frame structures used at primary and secondary hierarchical levels, July 1988. [11] American National Standard for Telecommunications -- Digital Expires August 1996 [Page 74] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 Hierarchy -- Layer 1 In-Service Digital Transmission Performace Monitoring, T1.231, Sept 1993. [12] CCITT Specifications Volume IV, Recommendation O.162, Equipment To Perform In Service Monitoring On 2048 kbit/s Signals, July 1988 [13] CCITT Specifications Volume III, Recommendation G.821, Error Performance Of An International Digital Connection Forming Part Of An Integrated Services Digital Network, July 1988. [14] AT&T Technical Reference, Technical Reference 62411, ACCUNET T1.5 Service Description And Interface Specification, December 1990. [15] CCITT Specifications Volume III, Recommendation G.706, Frame Alignment and Cyclic Redundancy Check (CRC) Procedures Relating to Basic Frame Structures Defined in Recommendation G.704, July 1988. [16] CCITT Specifications Volume III, Recommendation G.732, Characteristics Of Primary PCM Multiplex Equipment Operating at 2048 kbit/s, July 1988. [17] Fowler, D., "Definitions of Managed Objects for the DS3/E3 Interface Types", RFCxxxx, Newbridge Networks, February 1996 [18] Brown, T., and Tesink, K., "Definitions of Managed Objects for the SONET/SDH Interface Type", RFC1595, Bell Communications Research, March 1994. [19] Fowler, D., "Definitions of Managed Objects for the Ds0 and DS0Bundle Interface Types", RFCxxxx, Newbridge Networks, February 1996. [20] ITU-T G.775: Loss of signal (LOS) and alarm indication signal (AIS) defect detection and clearance criteria, May 1995. Expires August 1996 [Page 75] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 9. Security Considerations Security issues are not discussed in this memo. 10. Authors' Addresses David Fowler Newbridge Networks 600 March Road Kanata, Ontario, Canada K2K 2E6 Phone: (613) 599-3600, ext 3538 EMail: davef@newbridge.com Expires August 1996 [Page 76] INTERNET-DRAFT DS1/E1/DS2/E2 MIB February 1996 Table of Contents 1 The SNMPv2 Network Management Framework ...................... 2 2 Object Definitions ........................................... 3 2.1 Changes from RFC1406 ....................................... 3 3 Overview ..................................................... 5 3.1 Use of ifTable for DS1 Layer ............................... 5 3.2 Using ifStackTable ......................................... 6 3.3 Objectives of this MIB Module .............................. 8 3.4 DS1 Terminology ............................................ 9 3.4.1 Error Events ............................................. 9 3.4.2 Performance Defects ...................................... 10 3.4.3 Performance Parameters ................................... 11 3.4.4 Failure States ........................................... 14 3.4.5 Other Terms .............................................. 18 4 Object Definitions ........................................... 19 5.1 The DS1 Near End Group ..................................... 20 5.1.1 The DS1 Configuration Table .............................. 20 5.1.2 The DS1 Current Table .................................... 31 5.1.3 The DS1 Interval Table ................................... 36 5.1.4 The DS1 Total Table ...................................... 41 5.2 The DS1 Far End Group ...................................... 45 5.2.1 The DS1 Far End Current Table ............................ 45 5.2.2 The DS1 Far End Interval Table ........................... 49 5.2.3 The DS1 Far End Total Table .............................. 54 5.3 The DS1 Fractional Group ................................... 59 5.4 Conformance Groups ......................................... 62 5.5 The DS1 Trap Group ......................................... 67 5 Appendix A - Use of dsx1IfIndex and dsx1LineIndex ............ 67 6 Appendix B - The delay approach to Unavialable Seconds. ..... 69 7 Acknowledgments .............................................. 73 8 References ................................................... 74 9 Security Considerations ...................................... 76 10 Authors' Addresses .......................................... 76 Expires August 1996 [Page 77]