PWE3 O. Nicklass Internet-Draft RAD Data Communications Expires: January 13, 2006 July 12, 2005 Managed Objects for TDM over Packet Switched Network (PSN) draft-ietf-pwe3-tdm-mib-03.txt Status of this Memo By submitting this Internet-Draft, each author represents that any applicable patent or other IPR claims of which he or she is aware have been or will be disclosed, and any of which he or she becomes aware will be disclosed, in accordance with Section 6 of BCP 79. 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." The list of current Internet-Drafts can be accessed at http://www.ietf.org/ietf/1id-abstracts.txt. The list of Internet-Draft Shadow Directories can be accessed at http://www.ietf.org/shadow.html. This Internet-Draft will expire on January 13, 2006. Copyright Notice Copyright (C) The Internet Society (2005). Abstract This memo defines a portion of the Management Information Base (MIB) for use with network management protocols in the Internet community. In particular, it describes managed objects for pseudo wire encapsulation for structured or unstructured TDM (T1, E1, T3, E3) circuits over a Packet Switch Network (PSN). Nicklass Expires January 13, 2006 [Page 1] Internet-Draft Manage TDM over PSN July 2005 Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3 2. Conventions used in this document . . . . . . . . . . . . . 4 3. Terminology . . . . . . . . . . . . . . . . . . . . . . . . 4 4. The Internet-Standard Management Framework . . . . . . . . . 4 5. Overview . . . . . . . . . . . . . . . . . . . . . . . . . . 5 6. TDM MIB module usage . . . . . . . . . . . . . . . . . . . . 5 6.1 Structure of TDM MIB . . . . . . . . . . . . . . . . . . . 5 6.2 TDM Connection configuration Procedure . . . . . . . . . . 6 6.3 TDM PW Monitoring . . . . . . . . . . . . . . . . . . . . 6 7. Example of actual TDM PW Setup . . . . . . . . . . . . . . . 7 8. Object definition . . . . . . . . . . . . . . . . . . . . . 9 9. Security considerations . . . . . . . . . . . . . . . . . . 36 10. IANA considerations . . . . . . . . . . . . . . . . . . . . 37 11. References . . . . . . . . . . . . . . . . . . . . . . . . . 38 11.1 Normative references . . . . . . . . . . . . . . . . . . 38 11.2 Informative references . . . . . . . . . . . . . . . . . 39 12. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 39 Author's Address . . . . . . . . . . . . . . . . . . . . . . 39 Intellectual Property and Copyright Statements . . . . . . . 40 Nicklass Expires January 13, 2006 [Page 2] Internet-Draft Manage TDM over PSN July 2005 1. Introduction This document describes a model for managing TDM pseudo wires, i.e. TDM data encapsulated for transmission over a Packet Switched Network (PSN). The term TDM in this document is limited to the scope of PDH hierarchy. It is currently specified to carry any TDM Signals in either Structure Agnostic Transport mode (E1, T1, E3 and T3) or in Structure Aware Transport mode (E1, T1 and NxDS0) as defined in PWE3 TDM Requirements document [PWTDMREQ]. This document is closely related to [SATOP], [TDMOIP] and [CESOPSN] which describe the encapsulation of TDM signals and provide the Circuit Emulation Service over a Packet Switched Network (PSN). The TDM management model consists of several MIB modules, following the layering model described in the PWE3 Architecture [PWARCH] document. The TDM MIB module described in this document works closely with the MIB modules described in [DS3MIB], [DS1MIB], [DS0MIB], [IFMIB], [PWMIB] and the textual conventions defined in [PWTC]. The conceptual layering and relationship among all those is described in Figure 1 below. A TDM connection will be a pseudo-wire (PW) connection. It will not be treated as an interface and will therefore not be represented in the ifTable. Figure 1:Conceptual Layering +-------------------+ | TDM MIB | DS1MIB, DS3MIB, +-------------------+ DS0MIB | +-------------------+ PW-TDM-MIB, Service | TDM PW MIB | PW-CESOPSN-MIB, Layer +-------------------+ PW-TDMOIP-MIB - - - - - - - - - - - | - - - - - - - - - - - - - - - Generic +-------------------+ PW | Generic PW MIBS | PW-TC-MIB, Layer +-------------------+ PW-MIB - - - - - - - - - - - -| - - - - - - - - - - - - - - - +-------------------+ PSN VC | MPLS VC MIBS | PW-MPLS-MIB Layer +-------------------+ - - - - - - - - - - - -| - - - - - - - - - - - - - - - +-------------------+ PSN | MPLS MIBs | MPLS-TE-STD-MIB, Layer +-------------------+ MPLS-LSR-STD-MIB Nicklass Expires January 13, 2006 [Page 3] Internet-Draft Manage TDM over PSN July 2005 Figure 1 Comments should be made directly to PWE3 group at pwe3@ietf.org. 2. Conventions used in this document The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in RFC-2119 [BCP14]. 3. Terminology The Basic terminology used to refer to transmission direction in this document is taken from [SATOP] draft that describes a mechanism for transporting Structure-Agnostic (TDM) bit-streams over a packet- oriented network. For simplifying this document the terminology is used for structure and unstructured TDM as well. "PSN-bound" references the traffic direction where TDM data is received, adapted to packet based on number of payload bytes per packet, assigned a SAToP header (Sequence numbers, flags, and timestamps (if the RTP header is used)), prepended multiplexing layer and PSN headers and sent into the PSN. Conversely, The "CE-bound" references the traffic direction where packets are received from the PSN, packet payloads are reassembled by including a jitter buffer where payload of the received TDM packets is stored prior to play-out to the TDM line. The size of this buffer SHOULD be locally configurable to allow accommodation to the PSN- specific packet delay variation. The CE-bound TDM inter-working function (IWF) SHOULD use the sequence number in the control word for detection of lost (LOPS) and mis- ordered packets. If the RTP header is used, the RTP sequence numbers MAY be used for the same purposes. 4. The Internet-Standard Management Framework For a detailed overview of the documents that describe the current Internet-Standard Management Framework, please refer to section 7 of RFC 3410 [RFC3410]. Managed objects are accessed via a virtual information store, termed the Management Information Base or MIB. MIB objects are generally accessed through the Simple Network Management Protocol (SNMP). Objects in the MIB are defined using the mechanisms defined in the Structure of Management Information (SMI). This memo specifies a MIB module that is compliant to the SMIv2, which is described in STD 58, Nicklass Expires January 13, 2006 [Page 4] Internet-Draft Manage TDM over PSN July 2005 RFC 2578 [RFC2578], STD 58, RFC 2579 [RFC2579] and STD 58, RFC 2580 [RFC2580]. 5. Overview This MIB module is designed to satisfy the following requirements and constraints: 1. Fits within the architecture defined by [PWARCH] and [PWMIB]. 2. The MIB module supports edge-to-edge emulation of any TDM connections. 3. The MIB module configures the connection. The connection specific behavior is provided via the supplement MIB modules. 4. The MIB module reports various alarms, counters and status objects. 6. TDM MIB module usage 6.1 Structure of TDM MIB The MIB consists of five tables; -The TDM PW Table (pwVcTDMTable) contains generic TDM information regarding the PW connection. It contains the ifIndex of the TDM interface, an index to an entry in the generic configuration table (pwVcTDMCfgTable), an index to an entry in the specific configuration table (pwVcXXXCfgTable, where XXX can be TDMoIP or CESoPSN), config error indications, and various status indications. The two indices of the two configuration tables are providing the connection parameters. The TDM interface can be a full link of any TDM type like E1 or DS3 for example, or the interface of the bundle holding the collection of time slots to be transmitted. Based on the TDM PW type the relevant pwVcXXXCfgTable from the relevant MIB module will be used. The specific types are: o 17 Structure-agnostic E1 over Packet o 18 Structure-agnostic T1 (DS1) over Packet o 19 Structure-agnostic E3 over Packet o 20 Structure-agnostic T3 (DS3) over Packet o 21 CESoPSN basic mode (XXX=CESoPSN) o 22 TDMoIP AAL1mode (XXX=TDMoIP) o 23 CESoPSN TDM with CAS (XXX=CESoPSN) o 24 TDMoIP AAL2 Mode (XXX=TDMoIP) - The TDM generic parameter Table (pwVcTDMCfgTable, ) contains TDM generic configurable parameters for any TDM Type. - The TDM Performance Current Table (pwVcTDMPerfCurrentTable) contains TDM statistics for the current 15-minute period. Nicklass Expires January 13, 2006 [Page 5] Internet-Draft Manage TDM over PSN July 2005 - The TDM Performance Interval Table (pwVcTDMPerfIntervalTable) contains TDM statistics for historical intervals (usually 96 15- minute entries to cover a 24 hour period). - The TDM Performance Table (pwVcTDMPerfTable) contains TDM stats for statistics accumulated since the TDM PW was first established. 6.2 TDM Connection configuration Procedure Configuring a TDM PW involves the following steps: First Configure the parameters of the interface specific layer using DS1-MIB and or DS3-MIB. Next, if applicable, create a bundle of Time Slots using DS0 Bundle MIB [DS0MIB]. Next, create an entry in the pwVcTable and configure the PSN tunnels: - Follow steps as defined in [PWMIB]. NOTE: The agent should create an entry in the pwVcTDMTable for any entry created in the pwVcTable with pwVcType equal to a value between (17) to (24). Next complete the TDM PW configuration: - If necessary, create an entry in the relevant pwVcXXXCfgTable and in the pwVcTDMTable (suitable entries may already exist in both tables). - Set the index of the relevant pwVcXXXCfgTable entry and of the relevant pwVcTDMCfgTable entry in the pwVcTDMTable. 6.3 TDM PW Monitoring Upon making the TDM PW operational, the pwVcTDMPerfCurrentTable, pwVcTDMPerfIntervalTable, and pwVcTDMPerfTable can be used to monitor the various counters, indicators, and conditions of the PW. 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 running counters of each performance parameter. Performance parameters continue to be collected when the interface is down. 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 Nicklass Expires January 13, 2006 [Page 6] Internet-Draft Manage TDM over PSN July 2005 quarter hours. Performance parameters are of types PerfCurrentCount and PerfIntervalCount. These textual conventions are all Gauge32, and they are used because it is possible for these objects to decrease. 7. Example of actual TDM PW Setup This section provides an example of using the various MIB objects described in the following section to set up a TDM PW connection. First example, setting a connection of DS1 type. Second example setting a connection with bandwidth of 3 DS0 (time slots). While those examples are not meant to illustrate all options of the MIB, they are intended as an aid to understanding some of the key concepts. See [PWMIB] for an example of setting up PSN Tunnels. First example: 1. Configure the DS1 interface using DS1-MIB. 2. If needed, Create an entry in the pwVcTDMCfgTable (assuming index = 10); Verify that there are no errors in the configuration using the relevant object. 3. Get a new pwVcIndexNext [PWMIB] and create a new pwVcTable entry using the value of pwVcIndexNext (assume here, the PW index = 20). 4. Set the pwVcType [PWMIB] of the new entry to the relevant value (17) or (18). This should create a new entry in the pwVcTDMTable. 5. Configure the newly created TDM PW with the required pointers, indices, the relevant entry in pwVcTDMCfgTable (index 10). In [DS1MIB] dsx1IfIndex (ifIndex = 5) Nicklass Expires January 13, 2006 [Page 7] Internet-Draft Manage TDM over PSN July 2005 In pwVcTDMCfgTable entry: Set the connection characteristic parameters: { pwVcTDMCfgPayloadSize = 43 -- payload bytes pwVcTDMCfgPktReorder = FALSE pwVcTDMCfgRtpHdrUsed = FALSE pwVcTDMCfgJtrBfrDepth = 30000 -- micro-seconds } In pwVcTDMTable entry: Set the relevant ifIndex, the generic TDM Index and the specific TDM index to complete creation: { pwVcTDMIfIndex = 5 -- IfIndex of associated entry -- in DS1 table pwVcGenTDMCfgIndex = 10 -- Index of associated entry -- in pwVcTDMCfgTable. pwVcRelTDMCfgIndex = 0 -- No Index in associated entry -- in pwVcXXXCfgTable. } Verify that there are no error bits set in pwVcTDMConfigError. Second example: 1. Configure the DS1 interface using DS1-MIB. 2. set up a bundle and get its dsx0BundleIfIndex. Setting up the bundle should involve using IFMIB properly. 3. Since structured TDMoIP circuit is defined, the next MIB module to be used is TDMoIP-MIB. 4. If needed, Create an entry in the pwVcTDMCfgTable (assuming index = 7): 5. If needed, Create an entry in the pwVcXXXCfgTable (index = 11). XXX can be TDMoIP or CESoPSN 6. Verify that there are no error in the configuration using the relevant object. 7. Get a new pwVcIndexNext [PWMIB] and create a new pwVcTable entry using the value of pwVcIndexNext. 8. Set the pwVcType [PWMIB] of the new entry to (24). This should create a new entry in the pwVcTDMTable. 9. Configure the newly created TDM PW with the required pointers, indices and the relevant entries in pwVcTDMCfgTable and in pwVcXXXCfgTable (assuming indexes 7 and 11). Nicklass Expires January 13, 2006 [Page 8] Internet-Draft Manage TDM over PSN July 2005 In [DS1MIB] dsx1IfIndex (ifIndex) = 5 In [DS0MIB] dsx0BundleIfIndex = 8 In pwVcTDMTable entry: Set the relevant ifIndex, the generic TDM Index and the specific TDM index to complete creation: { pwVcTDMIfIndex = 8 -- IfIndex of associated entry -- in DS0 table pwVcGenTDMCfgIndex = 7 -- Index of associated entry -- in pwVcTDMCfgTable. pwVcRelTDMCfgIndex = 11 -- Index of associated entry -- in pwVcTDMoIPCfgTable. } Verify that there are no error bits set in pwVcTDMConfigError. 8. Object definition PW-TDM-MIB DEFINITIONS ::= BEGIN IMPORTS MODULE-IDENTITY, OBJECT-TYPE, Integer32, Counter32, Unsigned32 FROM SNMPv2-SMI MODULE-COMPLIANCE, OBJECT-GROUP FROM SNMPv2-CONF TEXTUAL-CONVENTION, TruthValue, RowStatus, StorageType, TimeStamp FROM SNMPv2-TC InterfaceIndexOrZero FROM IF-MIB PerfCurrentCount, PerfIntervalCount FROM PerfHist-TC-MIB pwStdMIB FROM PW-TC-STD-MIB pwVcIndex FROM PW-STD-MIB; Nicklass Expires January 13, 2006 [Page 9] Internet-Draft Manage TDM over PSN July 2005 -- The TDM MIB pwVcTDMMIB MODULE-IDENTITY LAST-UPDATED "200507120000Z" ORGANIZATION "Pseudo-Wire Emulation Edge-to-Edge (PWE3) Working Group" CONTACT-INFO " Orly Nicklass Postal: RAD Data Communications 24 Raoul Wallenberg St., Bldg C Tel Aviv 69719, Israel Email: orly_n@rad.com The PWE3 Working Group (email distribution pwe3@ietf.org, http://www.ietf.org/html.charters/pwe3-charter.html) " DESCRIPTION "This MIB contains managed object definitions for encapsulating TDM (T1,E1, T3, E3, NxDS0) as pseudo-wires over packet-switching networks (PSN). This MIB reports to the PW-STD-MIB as in: Zelig, D., Nadeau,T. 'Pseudo Wire (PW) Management Information Base'. ThePW-STD-MIB contains structures and MIB associations generic to Pseudo-Wire (PW) emulation. PW-specific MIBs (such as this) contain config and stats for specific PW types. Copyright (C) The Internet Society (2005). This version of this MIB module is part of RFC yyyy; see the RFC itself for full legal notices. -- RFC Ed.: replace yyyy with actual RFC number & remove this note" REVISION "200507120000Z" -- 12 July 2005 DESCRIPTION "Changes since last draft: 1-Merged all configurable objects from Satop MIB with objects of pwVcTDMCfgTable in this MIB module. 2-pwVcTDMCfgJtrBfrDepth-changed units to microsec. 3-pwVcTDMAvePktLossTimeWindow moved to the pwVcTDMCfgTable. 4-In pwVcTDMCfgConfErr, the enum(1)was renamed to PayloadSize. 5-Renamed pwVcSatopCfgConsecPktsLoss2Normal and pwVcSatopCfgConsecMissPktNorma2Loss to Nicklass Expires January 13, 2006 [Page 10] Internet-Draft Manage TDM over PSN July 2005 pwVcTDMCfgConsecPktsInSynch and to pwVcTDMCfgConsecMissPktsOutSynch respectively." REVISION "200404200000Z" -- 20 April 2004 DESCRIPTION "Initial version, published as draft-ietf-pwe3-TDM-mib-00.txt" ::= { pwStdMIB x } --To be assigned by IANA -- we request to assign value 7 -- Local Textual conventions PwVcTDMCfgIndex ::= TEXTUAL-CONVENTION STATUS current DESCRIPTION "Index into any of the relevant pwVcXXXCfgTable." SYNTAX Unsigned32 -- Tables, Scalars pwVcTDMObjects OBJECT IDENTIFIER ::= { pwVcTDMMIB 1 } -- Notifications pwVcTDMTraps OBJECT IDENTIFIER ::= { pwVcTDMMIB 2 } -- Conformance pwVcTDMConformance OBJECT IDENTIFIER ::= { pwVcTDMMIB 3 } -- TDM PW table pwVcTDMTable OBJECT-TYPE SYNTAX SEQUENCE OF PwVcTDMEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "This table contains basic information including ifIndex, and pointers to entries in the relevant TDM config tables for this TDM PW." ::= { pwVcTDMObjects 1 } pwVcTDMEntry OBJECT-TYPE SYNTAX PwVcTDMEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "This table is indexed by the same index that was created for the associated entry in the PW Table Nicklass Expires January 13, 2006 [Page 11] Internet-Draft Manage TDM over PSN July 2005 (in the PW-STD-MIB). - The PwVcIndex. An entry is created in this table by the agent for every entry in the pwVcTable with a pwVcType of 'TDM'." INDEX { pwVcIndex } ::= { pwVcTDMTable 1 } PwVcTDMEntry ::= SEQUENCE { pwVcTDMRate Integer32, pwVcTDMIfIndex InterfaceIndexOrZero, pwVcGenTDMCfgIndex PwVcTDMCfgIndex, pwVcRelTDMCfgIndex PwVcTDMCfgIndex, pwVcTDMConfigError BITS, pwVcTDMTimeElapsed Integer32, pwVcTDMValidIntervals Integer32, pwVcTDMCurrentIndications BITS, pwVcTDMLatchedIndications BITS, pwVcTDMLastEsTimeStamp TimeStamp } pwVcTDMRate OBJECT-TYPE SYNTAX Integer32 MAX-ACCESS read-write STATUS current DESCRIPTION "The parameter represents the bit-rate of the TDM service in multiples of the 'basic' 64 Kbit/s rate. For structure-agnostic teh following should be used: a) Satop E1 - 32 b) Satop T1 emulation: i) MUST be set to 24 in the basic emulation mode ii) MUST be set to 25 for the 'Octet-aligned T1' emulation mode c) Satop E3 - 535 d) Satop T3 - 699 For all kinds of structure-aware emulation, this parameter MUST be set to N where N is the number of DS0 channels in the corresponding attachment circuit." REFERENCE "See [TDMCP-EXT]" DEFVAL { 32 } ::= { pwVcTDMEntry 1 } Nicklass Expires January 13, 2006 [Page 12] Internet-Draft Manage TDM over PSN July 2005 pwVcTDMIfIndex OBJECT-TYPE SYNTAX InterfaceIndexOrZero MAX-ACCESS read-write STATUS current DESCRIPTION "This is a unique index within the ifTable. It represents the interface index of the full link or the interface index for the bundle holding the group of time slots to be transmitted via this PW connection. A value of zero indicates an interface index that has yet to be determined. Once set, if the TDM ifIndex is (for some reason) later removed, the agent SHOULD delete the associated PW rows (e.g., this pwVcTDMTable entry). If the agent does not delete the rows, the agent MUST set this object to zero." ::= { pwVcTDMEntry 2 } pwVcGenTDMCfgIndex OBJECT-TYPE SYNTAX PwVcTDMCfgIndex MAX-ACCESS read-write STATUS current DESCRIPTION "Index to the generic parameters in the TDM configuration table that appears in this MIB module. It is likely that multiple TDM PWs of the same characteristic will share a single TDM Cfg entry." ::= { pwVcTDMEntry 3 } pwVcRelTDMCfgIndex OBJECT-TYPE SYNTAX PwVcTDMCfgIndex MAX-ACCESS read-write STATUS current DESCRIPTION "Index to the relevant TDM configuration table entry that appears in one of the related MIB modules such as TDMoIP or CESoPSN. It is likely that multiple TDM PWs of the same characteristic will share a single configuration entry of the relevant type." ::= { pwVcTDMEntry 4 } pwVcTDMConfigError OBJECT-TYPE SYNTAX BITS { other ( 0), tdmTypeIncompatible ( 1), peerRtpIncompatible ( 2), peerPayloadSizeIncompatible ( 3) Nicklass Expires January 13, 2006 [Page 13] Internet-Draft Manage TDM over PSN July 2005 } MAX-ACCESS read-only STATUS current DESCRIPTION "Any of the bits are set if the local configuration is not compatible with the peer configuration as available from the various parameters options. -tdmTypeIncompatible bit is set if the local configuration is not carrying the same TDM type as the peer configuration. -peerRtpIncompatible bit is set if the local configuration is configured to send RTP packets for this PW, and the remote is not capable of accepting RTP packets. -peerPayloadSizeIncompatible bit is set if the local configuration is not carrying the same Payload Size as the peer configuration. " ::= { pwVcTDMEntry 5} pwVcTDMTimeElapsed OBJECT-TYPE SYNTAX Integer32 (1..900) MAX-ACCESS read-only STATUS current DESCRIPTION "The number of seconds, including partial seconds, that have elapsed since the beginning of the current measurement period. If, for some reason, such as an adjustment in the system's time-of-day clock, the current interval exceeds the maximum value, the agent will return the maximum value." ::= { pwVcTDMEntry 6} pwVcTDMValidIntervals OBJECT-TYPE SYNTAX Integer32 (0..96) MAX-ACCESS read-only STATUS current DESCRIPTION "The number of previous 15-minute intervals for which data was collected. An agent with TDM capability must be capable of supporting at least n intervals. The minimum value of n is 4, The default of n is 32 and the maximum value of n is 96. The value will be unless the measurement was (re-) started within the last (*15) minutes, in which case the value will be the number of complete 15 minute intervals for which the agent has at least some data. In certain cases(e.g., in the case where the agent is Nicklass Expires January 13, 2006 [Page 14] Internet-Draft Manage TDM over PSN July 2005 a proxy) it is possible that some intervals are unavailable. In this case, this interval is the maximum interval number for which data is available. " ::= { pwVcTDMEntry 7} pwVcTDMCurrentIndications OBJECT-TYPE SYNTAX BITS { other ( 0), strayPacket ( 1), malformedPacket ( 2), excessivePktLossRate( 3), bufferOverrun ( 4), bufferUnderrun ( 5), remotePktLoss ( 6), pktMisOrder ( 7), packetLoss ( 8), tdmFault ( 9) } MAX-ACCESS read-only STATUS current DESCRIPTION "The following defects should be detected and reported upon request: -Stray packets MAY be detected by the PSN and multiplexing layers. Stray packets MUST be discarded by the CE-bound IWF and their detection MUST NOT affect mechanisms for detection of packet loss. -Malformed packets are detected by mismatch between the expected packet size (taking the value of the L bit into account) and the actual packet size inferred from the PSN and multiplexing layers. Malformed in-order packets MUST be discarded by the CE-bound IWF and replacement data generated as for lost packets. -Excessive packet loss rate is detected by computing the average packet loss rate over the value of pwVcTDMAvePktLossTimeWindow and comparing it with a preconfigured threshold [SATOP]. -Buffer overrun is detected in the normal operation state when the CE bound IWF's jitter buffer cannot accommodate newly arrived packets. -Remote packet loss is indicated by reception of packets with their R bit set. Nicklass Expires January 13, 2006 [Page 15] Internet-Draft Manage TDM over PSN July 2005 -Packet misorder is detected by looking at the Sequence number provided by the control word. -TDM Fault, if L bit in the control word is set, it indicates that TDM data carried in the payload is invalid due an attachment circuit fault. When the L bit is set the payload MAY be omitted in order to conserve bandwidth. Note: the algorithm used to capture these indications is implementation specific." ::= { pwVcTDMEntry 8} pwVcTDMLatchedIndications OBJECT-TYPE SYNTAX BITS { other ( 0), staryPacket ( 1), malformedPacket ( 2), excessivePktLossRate( 3), bufferOverrun ( 4), bufferUnderrun ( 5), remotePktLoss ( 6), pktMisOrder ( 7), packetLoss ( 8), tdmFault ( 9) } MAX-ACCESS read-only STATUS current DESCRIPTION "The state of TDM indicators when the TDM PW last declared an error second (either as ES, SES or a second with errors inside a UAS) condition. At this time, only LOPS can create a failure. Since indicators other than LOPS are useful, all are latched here. For bit definitions, see pwVcTDMCurrentIndications above. Note: the algorithm used to latch these indications when entering an defect state is implementation specific." ::= { pwVcTDMEntry 9} pwVcTDMLastEsTimeStamp OBJECT-TYPE SYNTAX TimeStamp MAX-ACCESS read-only STATUS current DESCRIPTION "The value of sysUpTime on the most recent occasion at which the TDM PW entered the ES or SES state." ::= { pwVcTDMEntry 10} Nicklass Expires January 13, 2006 [Page 16] Internet-Draft Manage TDM over PSN July 2005 -- End of TDM PW table -- PW Generic TDM PW Configuration Table pwVcTDMCfgIndexNext OBJECT-TYPE SYNTAX PwVcTDMCfgIndex MAX-ACCESS read-only STATUS current DESCRIPTION "This object contains the value to be used for pwVcTDMCfgIndex when creating entries in the pwVcTDMCfgTable. The value 0 indicates that no unassigned entries are available. To obtain the value of pwVcTDMCfgIndex for a new entry in the pwVcTDMCfgTable, the manager issues a management protocol retrieval operation to obtain the current value of pwVcTDMCfgIndex. After each retrieval operation, the agent should modify the value to reflect the next unassigned index. After a manager retrieves a value the agent will determine through its local policy when this index value will be made available for reuse." ::= { pwVcTDMObjects 2 } pwVcTDMCfgTable OBJECT-TYPE SYNTAX SEQUENCE OF PwVcTDMCfgEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "This table contains a set of parameters that may be referenced by one or more TDM PWs in pwVcTDMTable." ::= { pwVcTDMObjects 3 } pwVcTDMCfgEntry OBJECT-TYPE SYNTAX PwVcTDMCfgEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "These parameters define the characteristics of a TDM PW. They are grouped here to ease NMS burden. Once an entry is created here it may be re-used by many PWs." INDEX { pwVcTDMCfgIndex } ::= { pwVcTDMCfgTable 1 } Nicklass Expires January 13, 2006 [Page 17] Internet-Draft Manage TDM over PSN July 2005 PwVcTDMCfgEntry ::= SEQUENCE { pwVcTDMCfgIndex PwVcTDMCfgIndex, pwVcTDMCfgRowStatus RowStatus, pwVcTDMCfgConfErr BITS, pwVcTDMCfgPayloadSize Unsigned32, pwVcTDMCfgPktReorder TruthValue, pwVcTDMCfgRtpHdrUsed TruthValue, pwVcTDMCfgJtrBfrDepth Unsigned32, pwVcTDMCfgPayloadSuppression INTEGER, pwVcTDMCfgConsecPktsInSynch Unsigned32, pwVcTDMCfgConsecMissPktsOutSynch Unsigned32, pwVcTDMCfgSetUp2SynchTimeOut Unsigned32, pwVcTDMCfgPktReplacePolicy INTEGER, pwVcTDMCfgAvePktLossTimeWindow Integer32, pwVcTDMCfgExcessivePktLossThreshold Unsigned32, pwVcTDMCfgAlarmThreshold Unsigned32, pwVcTDMCfgClearAlarmThreshold Unsigned32, pwVcTDMCfgMissingPktsToSes Unsigned32, pwVcTDMCfgTimestampMode INTEGER, pwVcTDMCfgStorageType StorageType } pwVcTDMCfgIndex OBJECT-TYPE SYNTAX PwVcTDMCfgIndex MAX-ACCESS not-accessible STATUS current DESCRIPTION "Index to an entry in this table" ::= { pwVcTDMCfgEntry 1 } pwVcTDMCfgRowStatus OBJECT-TYPE SYNTAX RowStatus MAX-ACCESS read-create STATUS current DESCRIPTION "Object used for creating, modifying, and deleting a row from this table." ::= { pwVcTDMCfgEntry 2 } pwVcTDMCfgConfErr OBJECT-TYPE SYNTAX BITS { other ( 0), payloadSize ( 1), Nicklass Expires January 13, 2006 [Page 18] Internet-Draft Manage TDM over PSN July 2005 jtrBfrDepth ( 2) } MAX-ACCESS read-only STATUS current DESCRIPTION "Various configuration errors. Illegal settings within the pwVcTDMCfg table." ::= { pwVcTDMCfgEntry 3 } pwVcTDMCfgPayloadSize OBJECT-TYPE SYNTAX Unsigned32 MAX-ACCESS read-create STATUS current DESCRIPTION "The value of this object indicates the PayLoad Size (in bytes) to be defined during the PW setUp. Upon TX, implementation must be capable of carrying that amount of bytes. Upon RX, When the LEN field is set to 0, the payload of packet MUST assume this size, and if the actual packet size is inconsistent with this length, the packet MUST be considered to be malformed. " ::= { pwVcTDMCfgEntry 4 } pwVcTDMCfgPktReorder OBJECT-TYPE SYNTAX TruthValue MAX-ACCESS read-create STATUS current DESCRIPTION "If set True: as CE bound packets are queued in the jitter buffer, out of order packets are re-ordered. The maximum sequence number differential (i.e., the range in which re-sequencing can occur) is dependant on the depth of the jitter buffer. See pwVcTDMCfgJtrBfrDepth. NOTE: Some implementations may not support this feature. The agent is then required to set this False." ::= { pwVcTDMCfgEntry 5 } pwVcTDMCfgRtpHdrUsed OBJECT-TYPE SYNTAX TruthValue MAX-ACCESS read-create STATUS current DESCRIPTION "If set False: an RTP header is not pre-pended to the TDM packet." REFERENCE "See [SATOP]" DEFVAL { false } Nicklass Expires January 13, 2006 [Page 19] Internet-Draft Manage TDM over PSN July 2005 ::= { pwVcTDMCfgEntry 6 } pwVcTDMCfgJtrBfrDepth OBJECT-TYPE SYNTAX Unsigned32 UNITS "microsecond" MAX-ACCESS read-create STATUS current DESCRIPTION "The size of the Jitter buffer SHOULD be defined to a value that is capable to allow accommodation to the PSN-specific packet delay variation. If configured to a value not supported by the implementation, the agent MUST return an error code 'jtrBfrDepth' in 'pwVcTDMConfigError ' NOTE: jitter buffers are a limited resource to be managed. The size should be at least twice as big as the value of pwVcTDMCfgJtrBfrDepth " DEFVAL { 3000 } ::= { pwVcTDMCfgEntry 7 } pwVcTDMCfgPayloadSuppression OBJECT-TYPE SYNTAX INTEGER { enable ( 1), disable ( 2) } MAX-ACCESS read-create STATUS current DESCRIPTION "Selecting 'enable' means: Payload suppression is allowed. Payload MAY be omitted in order to conserve bandwidth. Selecting 'disable' means: no suppresion under any condition." DEFVAL { disable } ::= { pwVcTDMCfgEntry 8 } -- The following counters work together to integrate -- errors and the lack of errors on the TDM PW. An error is -- caused by a missing packet. Missing packet can be a result -- of: packet loss in the network, (uncorrectable) packet out -- of sequence, packet length error, jitter buffer overflow, -- and jitter buffer underflow. The result is declaring whether -- or not the TDM PW is in Loss of Packet (LOPS) state. -- Nicklass Expires January 13, 2006 [Page 20] Internet-Draft Manage TDM over PSN July 2005 pwVcTDMCfgConsecPktsInSynch OBJECT-TYPE SYNTAX Unsigned32 MAX-ACCESS read-create STATUS current DESCRIPTION "The number of consecutive packets with sequential sequence numbers that are required to exit the LOPS state." REFERENCE "See [SATOP]" DEFVAL { 2 } ::= { pwVcTDMCfgEntry 9 } pwVcTDMCfgConsecMissPktsOutSynch OBJECT-TYPE SYNTAX Unsigned32 MAX-ACCESS read-create STATUS current DESCRIPTION " The number of consecutive missing packets that are required to enter the LOPS state." REFERENCE "See [SATOP]" DEFVAL { 10 } ::= { pwVcTDMCfgEntry 10 } pwVcTDMCfgSetUp2SynchTimeOut OBJECT-TYPE SYNTAX Unsigned32 MAX-ACCESS read-create STATUS current DESCRIPTION "The intermediate state timer is set to this value. The IWF is in an intermediate state until pwVcTDMCfgConsecPktsInSynch consecutive TDM packets has been received or until this timer expires. The timer units are (millisec)" DEFVAL { 5} ::= { pwVcTDMCfgEntry 11 } pwVcTDMCfgPktReplacePolicy OBJECT-TYPE SYNTAX INTEGER { allOnes (1), implementationSpecific(2) } MAX-ACCESS read-create STATUS current DESCRIPTION "This is the value to be played when CE bound packets Nicklass Expires January 13, 2006 [Page 21] Internet-Draft Manage TDM over PSN July 2005 have over/underflow the jitter buffer, or are missing for any reason. This byte pattern is sent (played) on the TDM line." DEFVAL { 1 } -- Play all ones ::= { pwVcTDMCfgEntry 12 } pwVcTDMCfgAvePktLossTimeWindow OBJECT-TYPE SYNTAX Integer32 UNITS "millisecond" MAX-ACCESS read-create STATUS current DESCRIPTION "The length of time over which the average packet loss rate should be computed to detect Excessive packet loss rate" ::= { pwVcTDMCfgEntry 13} pwVcTDMCfgExcessivePktLossThreshold OBJECT-TYPE SYNTAX Unsigned32 MAX-ACCESS read-create STATUS current DESCRIPTION "Excessive packet loss rate is detected by computing the average packetloss rate over a pwVcTDMCfgAvePktLossTimeWindow amount of time and comparing it with this threshold value. " ::= { pwVcTDMCfgEntry 14 } pwVcTDMCfgAlarmThreshold OBJECT-TYPE SYNTAX Unsigned32 MAX-ACCESS read-create STATUS current DESCRIPTION "Alarms are only reported when the defect state persists for the length of time specified by this object. The object's unit is millisec" DEFVAL { 2500 } ::= { pwVcTDMCfgEntry 15 } pwVcTDMCfgClearAlarmThreshold OBJECT-TYPE SYNTAX Unsigned32 MAX-ACCESS read-create STATUS current DESCRIPTION "Alarm MUST be cleared after the corresponding defect is undetected for the amount of time specified by this object. The object's unit is millisec" DEFVAL { 10000 } Nicklass Expires January 13, 2006 [Page 22] Internet-Draft Manage TDM over PSN July 2005 ::= { pwVcTDMCfgEntry 16 } pwVcTDMCfgMissingPktsToSes OBJECT-TYPE SYNTAX Unsigned32 UNITS "seconds" MAX-ACCESS read-create STATUS current DESCRIPTION "Number of missing packets detected (consecutive or not) within a 1 second window to cause a Severely Error Second (SES) to be counted." DEFVAL { 3 } ::= { pwVcTDMCfgEntry 17 } pwVcTDMCfgTimestampMode OBJECT-TYPE SYNTAX INTEGER { notApplicable (1), absolute (2), differential (3) } MAX-ACCESS read-create STATUS current DESCRIPTION "Timestamp generation MAY be used in one of the following modes: 1. Absolute mode: the PSN-bound IWF sets timestamps using the clock recovered from the incoming TDM attachment circuit. As a consequence, the timestamps are closely correlated with the sequence numbers. All TDM implementations that support usage of the RTP header MUST support this mode. 2. Differential mode: Both IWFs have access to a common high- quality timing source, and this source is used for timestamp generation. Support of this mode is OPTIONAL. " ::= { pwVcTDMCfgEntry 18 } pwVcTDMCfgStorageType OBJECT-TYPE SYNTAX StorageType MAX-ACCESS read-create STATUS current DESCRIPTION "This variable indicates the storage type for this row." ::= { pwVcTDMCfgEntry 19 } -- END of Table Nicklass Expires January 13, 2006 [Page 23] Internet-Draft Manage TDM over PSN July 2005 -- TDM PW Performance Current Table. pwVcTDMPerfCurrentTable OBJECT-TYPE SYNTAX SEQUENCE OF PwVcTDMPerfCurrentEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "The current 15 minute interval counts are in this table. This table provides per TDM PW performance information." ::= { pwVcTDMObjects 5 } pwVcTDMPerfCurrentEntry OBJECT-TYPE SYNTAX PwVcTDMPerfCurrentEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "An entry in this table is created by the agent for every pwVcTDM entry. After 15 minutes, the contents of this table entry are copied to a new entry in the pwVcTDMPerfInterval table and the counts in this entry are reset to zero." INDEX { pwVcIndex } ::= { pwVcTDMPerfCurrentTable 1 } PwVcTDMPerfCurrentEntry ::= SEQUENCE { pwVcTDMPerfCurrentMisOrder Counter32, pwVcTDMPerfCurrentPktsReOrder Counter32, pwVcTDMPerfCurrentJtrBfrUnderruns Counter32, pwVcTDMPerfCurrentJtrBfrOverruns Counter32, pwVcTDMPerfCurrentMalformedPkt Counter32, pwVcTDMPerfCurrentESs PerfCurrentCount, pwVcTDMPerfCurrentSESs PerfCurrentCount, pwVcTDMPerfCurrentUASs PerfCurrentCount, pwVcTDMPerfCurrentFC PerfCurrentCount } pwVcTDMPerfCurrentMisOrder OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION "Number of times the sequence number of an incoming frame Nicklass Expires January 13, 2006 [Page 24] Internet-Draft Manage TDM over PSN July 2005 causes a transition to LOPS." ::= { pwVcTDMPerfCurrentEntry 1 } pwVcTDMPerfCurrentPktsReOrder OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION "Number of packets detected out of sequence (via TDM header sequence numbers), but successfully re-ordered. Note: some implementations may not support this Feature." ::= { pwVcTDMPerfCurrentEntry 2 } pwVcTDMPerfCurrentJtrBfrUnderruns OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION "Number of times a packet needed to be played out and the jitter buffer was empty." ::= { pwVcTDMPerfCurrentEntry 3 } pwVcTDMPerfCurrentJtrBfrOverruns OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION "Number of packets detected out of range (via TDM header sequence numbers), and could not be re- ordered, or could not fit in the jitter buffer." ::= { pwVcTDMPerfCurrentEntry 4 } pwVcTDMPerfCurrentMalformedPkt OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION "Number of packets detected with unexpected size, or bad headers' stack" ::= { pwVcTDMPerfCurrentEntry 5 } pwVcTDMPerfCurrentESs OBJECT-TYPE SYNTAX PerfCurrentCount MAX-ACCESS read-only STATUS current DESCRIPTION "The counter associated with the number of Error Nicklass Expires January 13, 2006 [Page 25] Internet-Draft Manage TDM over PSN July 2005 Seconds encountered." ::= { pwVcTDMPerfCurrentEntry 6 } pwVcTDMPerfCurrentSESs OBJECT-TYPE SYNTAX PerfCurrentCount MAX-ACCESS read-only STATUS current DESCRIPTION "The counter associated with the number of Severely Error Seconds encountered." ::= { pwVcTDMPerfCurrentEntry 7 } pwVcTDMPerfCurrentUASs OBJECT-TYPE SYNTAX PerfCurrentCount MAX-ACCESS read-only STATUS current DESCRIPTION "The counter associated with the number of Unavailable Seconds encountered." ::= { pwVcTDMPerfCurrentEntry 8 } pwVcTDMPerfCurrentFC OBJECT-TYPE SYNTAX PerfCurrentCount MAX-ACCESS read-only STATUS current DESCRIPTION "TDM Failure Counts (FC-TDM). The number of TDM failure events. A failure event begins when the LOPS failure is declared, and ends when the failure is cleared. A failure event that begins in one period and ends in another period is counted only in the period in which it begins." ::= { pwVcTDMPerfCurrentEntry 9 } -- End TDM PW Performance Current Interval Table -- TDM PW Performance Interval Table. pwVcTDMPerfIntervalTable OBJECT-TYPE SYNTAX SEQUENCE OF PwVcTDMPerfIntervalEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "This table provides performance information per TDM PW similar to the pwVcTDMPerfCurrentTable above. However, these counts represent historical 15 minute intervals. Typically, this table will have a maximum of 96 entries Nicklass Expires January 13, 2006 [Page 26] Internet-Draft Manage TDM over PSN July 2005 for a 24 hour period, but is not limited to this. " ::= { pwVcTDMObjects 6 } pwVcTDMPerfIntervalEntry OBJECT-TYPE SYNTAX PwVcTDMPerfIntervalEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "An entry in this table is created by the agent for every pwVcTDMPerfCurrentEntry that is 15 minutes old. The contents of the Current entry are copied to the new entry here. The Current entry, then resets its counts to zero for the next current 15 minute interval. " INDEX { pwVcIndex, pwVcTDMPerfIntervalNumber } ::= { pwVcTDMPerfIntervalTable 1 } PwVcTDMPerfIntervalEntry ::= SEQUENCE { pwVcTDMPerfIntervalNumber Unsigned32, pwVcTDMPerfIntervalValidData TruthValue, pwVcTDMPerfIntervalDuration Integer32, pwVcTDMPerfIntervalMisOrder Counter32, pwVcTDMPerfIntervalPktsReOrder Counter32, pwVcTDMPerfIntervalJtrBfrUnderruns Counter32, pwVcTDMPerfIntervalJtrBfrOverruns Counter32, pwVcTDMPerfIntervalMalformedPkt Counter32, pwVcTDMPerfIntervalESs PerfIntervalCount, pwVcTDMPerfIntervalSESs PerfIntervalCount, pwVcTDMPerfIntervalUASs PerfIntervalCount, pwVcTDMPerfIntervalFC PerfIntervalCount } pwVcTDMPerfIntervalNumber OBJECT-TYPE SYNTAX Unsigned32 MAX-ACCESS not-accessible STATUS current DESCRIPTION "A number (normally between 1 and 96 to cover a 24 hour period) which identifies the interval for which the set of statistics is available. The interval identified by 1 is the most recently completed 15 minute interval, and the interval identified by N is the interval immediately preceding the one identified by N-1. The minimum range of N is 1 through 4. The default range is 1 through 32. The maximum value of N is 1 through 96." Nicklass Expires January 13, 2006 [Page 27] Internet-Draft Manage TDM over PSN July 2005 ::= { pwVcTDMPerfIntervalEntry 1 } pwVcTDMPerfIntervalValidData OBJECT-TYPE SYNTAX TruthValue MAX-ACCESS read-only STATUS current DESCRIPTION "This variable indicates if the data for this interval is valid." ::= { pwVcTDMPerfIntervalEntry 2 } pwVcTDMPerfIntervalDuration OBJECT-TYPE SYNTAX Integer32 MAX-ACCESS read-only STATUS current DESCRIPTION "The duration of a particular interval in seconds, Adjustments in the system's time-of-day clock, may cause the interval to be greater or less than, the normal value. Therefore this actual interval value is provided." ::= { pwVcTDMPerfIntervalEntry 3 } pwVcTDMPerfIntervalMisOrder OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION "Number of times the sequence number of an incoming frame causes a transition to LOPS." ::= { pwVcTDMPerfIntervalEntry 4 } pwVcTDMPerfIntervalPktsReOrder OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION "Number of packets detected out of sequence (via TDM header sequence numbers), but successfully re-ordered. Note: some implementations mat not support this feature." ::= { pwVcTDMPerfIntervalEntry 5 } pwVcTDMPerfIntervalJtrBfrUnderruns OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION Nicklass Expires January 13, 2006 [Page 28] Internet-Draft Manage TDM over PSN July 2005 "Number of times a packet needed to be played out and the jitter buffer was empty." ::= { pwVcTDMPerfIntervalEntry 6 } pwVcTDMPerfIntervalJtrBfrOverruns OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION "Number of packets detected out of range (via TDM header sequence numbers), and could not be re- ordered, or could not fit in the jitter buffer." ::= { pwVcTDMPerfIntervalEntry 7 } pwVcTDMPerfIntervalMalformedPkt OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION "Number of packets detected with unexpected size, or bad headers' stack" ::= { pwVcTDMPerfIntervalEntry 8 } pwVcTDMPerfIntervalESs OBJECT-TYPE SYNTAX PerfIntervalCount MAX-ACCESS read-only STATUS current DESCRIPTION "The counter associated with the number of Error Seconds encountered." ::= { pwVcTDMPerfIntervalEntry 9 } pwVcTDMPerfIntervalSESs OBJECT-TYPE SYNTAX PerfIntervalCount MAX-ACCESS read-only STATUS current DESCRIPTION "The counter associated with the number of Severely Error Seconds encountered." ::= { pwVcTDMPerfIntervalEntry 10 } pwVcTDMPerfIntervalUASs OBJECT-TYPE SYNTAX PerfIntervalCount MAX-ACCESS read-only STATUS current DESCRIPTION "The counter associated with the number of Nicklass Expires January 13, 2006 [Page 29] Internet-Draft Manage TDM over PSN July 2005 Unavailable Seconds encountered." ::= { pwVcTDMPerfIntervalEntry 11 } pwVcTDMPerfIntervalFC OBJECT-TYPE SYNTAX PerfIntervalCount MAX-ACCESS read-only STATUS current DESCRIPTION "TDM Failure Counts (FC-TDM). The number of TDM failure events. A failure event begins when the LOPS failure is declared, and ends when the failure is cleared. A failure event that begins in one period and ends in another period is counted only in the period in which it begins." ::= { pwVcTDMPerfIntervalEntry 12 } -- End TDM PW Performance Interval Table -- TDM PW Performance Table pwVcTDMPerfTable OBJECT-TYPE SYNTAX SEQUENCE OF PwVcTDMPerfEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "This table provides performance information per TDM PW similar to the pwVcTDMPerfIntervalTable above. However, these counters represent complete historical information. " ::= { pwVcTDMObjects 7 } pwVcTDMPerfEntry OBJECT-TYPE SYNTAX PwVcTDMPerfEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "An entry is created in this table by the agent for every entry in the pwVcTDM table." INDEX { pwVcIndex } ::= { pwVcTDMPerfTable 1 } PwVcTDMPerfEntry ::= SEQUENCE { pwVcTDMPerfMisOrder Counter32, pwVcTDMPerfPktsReOrder Counter32, pwVcTDMPerfJtrBfrUnderruns Counter32, pwVcTDMPerfJtrBfrOverruns Counter32, Nicklass Expires January 13, 2006 [Page 30] Internet-Draft Manage TDM over PSN July 2005 pwVcTDMPerfMalformedPkt Counter32, pwVcTDMPerfESs Counter32, pwVcTDMPerfSESs Counter32, pwVcTDMPerfUASs Counter32, pwVcTDMPerfFC Counter32, pwVcTDMPerfDiscontinuityTime TimeStamp } pwVcTDMPerfMisOrder OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION "Number of times the sequence number of an incoming frame causes a transition to LOPS." ::= { pwVcTDMPerfEntry 1 } pwVcTDMPerfPktsReOrder OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION "Number of packets detected out of sequence (via TDM header sequence numbers), but successfully re-ordered. Note: some implementations may not support this feature." ::= { pwVcTDMPerfEntry 2 } pwVcTDMPerfJtrBfrUnderruns OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION "Number of times a packet needed to be played out and the jitter buffer was empty." ::= { pwVcTDMPerfEntry 3 } pwVcTDMPerfJtrBfrOverruns OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION "Number of packets detected out of range (via TDM header sequence numbers), and could not be re- ordered, or could not fit in the jitter buffer." ::= { pwVcTDMPerfEntry 4 } Nicklass Expires January 13, 2006 [Page 31] Internet-Draft Manage TDM over PSN July 2005 pwVcTDMPerfMalformedPkt OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION "Number of packets detected with unexpected size, or bad headers' stack." ::= { pwVcTDMPerfEntry 5 } pwVcTDMPerfESs OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION "The counter associated with the number of Error Seconds encountered. See [SATOP] for definition of ES." ::= { pwVcTDMPerfEntry 6 } pwVcTDMPerfSESs OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION "The counter associated with the number of Severely Error Seconds. Also see [SATOP] for definition." ::= { pwVcTDMPerfEntry 7 } pwVcTDMPerfUASs OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION "The counter associated with the number of UnAvailable Seconds. NOTE: When first entering the UAS state, the number of Ses To Uas is added to this object, then as each additional UAS occurs, this object increments by one." ::= { pwVcTDMPerfEntry 8 } pwVcTDMPerfFC OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current Nicklass Expires January 13, 2006 [Page 32] Internet-Draft Manage TDM over PSN July 2005 DESCRIPTION "TDM Failure Counts (FC-TDM). The number of TDM failure events. A failure event begins when the LOPS failure is declared, and ends when the failure is cleared." ::= { pwVcTDMPerfEntry 9 } pwVcTDMPerfDiscontinuityTime OBJECT-TYPE SYNTAX TimeStamp MAX-ACCESS read-only STATUS current DESCRIPTION "The value of sysUpTime on the most recent occasion at which any one or more of this segment's Counter32 suffered a discontinuity. If no such discontinuities have occurred since the last re- initialization of the local management subsystem, then this object contains a zero value." ::= { pwVcTDMPerfEntry 10 } -- End of PW TDM Performance table -- Conformance Information pwVcTDMGroups OBJECT IDENTIFIER ::= { pwVcTDMConformance 1 } pwVcTDMCompliances OBJECT IDENTIFIER ::= { pwVcTDMConformance 2 } pwTDMModuleCompliance MODULE-COMPLIANCE STATUS current DESCRIPTION "The compliance statement for agent that support TDM PW over PSN operation." MODULE -- this module MANDATORY-GROUPS { pwVcTDMGroup, pwVcTDMPerfCurrentGroup, pwVcTDMPerfIntervalGroup, pwVcTDMPerfGroup } OBJECT pwVcTDMCfgPktReorder MIN-ACCESS read-only DESCRIPTION "The ability to set the packet reordering is not required." Nicklass Expires January 13, 2006 [Page 33] Internet-Draft Manage TDM over PSN July 2005 OBJECT pwVcTDMCfgRtpHdrUsed MIN-ACCESS read-only DESCRIPTION "The ability to set the whether to use the RTP header or not is not required." OBJECT pwVcTDMCfgPayloadSuppression MIN-ACCESS read-only DESCRIPTION "The ability to set this object is not required." ::= { pwVcTDMCompliances 1 } -- Units of conformance. pwVcTDMGroup OBJECT-GROUP OBJECTS { pwVcTDMRate, pwVcTDMIfIndex, pwVcGenTDMCfgIndex, pwVcRelTDMCfgIndex, pwVcTDMConfigError, pwVcTDMTimeElapsed, pwVcTDMValidIntervals, pwVcTDMCurrentIndications, pwVcTDMLatchedIndications, pwVcTDMLastEsTimeStamp, pwVcTDMCfgRowStatus, pwVcTDMCfgConfErr, pwVcTDMCfgPayloadSize, pwVcTDMCfgPktReorder, pwVcTDMCfgRtpHdrUsed, pwVcTDMCfgJtrBfrDepth, pwVcTDMCfgPayloadSuppression, pwVcTDMCfgConsecPktsInSynch, pwVcTDMCfgConsecMissPktsOutSynch, pwVcTDMCfgSetUp2SynchTimeOut, pwVcTDMCfgPktReplacePolicy, pwVcTDMCfgAvePktLossTimeWindow , pwVcTDMCfgExcessivePktLossThreshold, pwVcTDMCfgAlarmThreshold , Nicklass Expires January 13, 2006 [Page 34] Internet-Draft Manage TDM over PSN July 2005 pwVcTDMCfgClearAlarmThreshold, pwVcTDMCfgMissingPktsToSes, pwVcTDMCfgTimestampMode, pwVcTDMCfgStorageType } STATUS current DESCRIPTION "Collection of objects for basic TDM PW config and status." ::= { pwVcTDMGroups 1 } pwVcTDMPerfCurrentGroup OBJECT-GROUP OBJECTS { pwVcTDMPerfCurrentMisOrder, pwVcTDMPerfCurrentPktsReOrder, pwVcTDMPerfCurrentJtrBfrUnderruns, pwVcTDMPerfCurrentJtrBfrOverruns, pwVcTDMPerfCurrentMalformedPkt, pwVcTDMPerfCurrentESs, pwVcTDMPerfCurrentSESs, pwVcTDMPerfCurrentUASs, pwVcTDMPerfCurrentFC } STATUS current DESCRIPTION "Collection of current statistics objects for TDM PWs." ::= { pwVcTDMGroups 2 } pwVcTDMPerfIntervalGroup OBJECT-GROUP OBJECTS { pwVcTDMPerfIntervalValidData, pwVcTDMPerfIntervalDuration, pwVcTDMPerfIntervalMisOrder, pwVcTDMPerfIntervalPktsReOrder, pwVcTDMPerfIntervalJtrBfrUnderruns, pwVcTDMPerfIntervalJtrBfrOverruns, pwVcTDMPerfIntervalMalformedPkt, pwVcTDMPerfIntervalESs, pwVcTDMPerfIntervalSESs, pwVcTDMPerfIntervalUASs, pwVcTDMPerfIntervalFC Nicklass Expires January 13, 2006 [Page 35] Internet-Draft Manage TDM over PSN July 2005 } STATUS current DESCRIPTION "Collection of Interval statistics objects for TDM PWs." ::= { pwVcTDMGroups 3 } pwVcTDMPerfGroup OBJECT-GROUP OBJECTS { pwVcTDMPerfMisOrder, pwVcTDMPerfPktsReOrder, pwVcTDMPerfJtrBfrUnderruns, pwVcTDMPerfJtrBfrOverruns, pwVcTDMPerfMalformedPkt, pwVcTDMPerfESs, pwVcTDMPerfSESs, pwVcTDMPerfUASs, pwVcTDMPerfFC, pwVcTDMPerfDiscontinuityTime } STATUS current DESCRIPTION "Collection of running statistics objects for TDM PWs." ::= { pwVcTDMGroups 4 } END 9. Security considerations It is clear that this MIB module is potentially useful for monitoring of TDM PWs. This MIB can also be used for configuration of certain objects, and anything that can be configured can be incorrectly configured, with potentially disastrous results. There are a number of management objects defined in this MIB module with a MAX-ACCESS clause of read-write and/or read-create. Such objects may be considered sensitive or vulnerable in some network environments. The support for SET operations in a non-secure environment without proper protection can have a negative effect on network operations. These are the tables and objects and their sensitivity/vulnerability: The pwVcTDMTable and pwVcTDMCfgTable contain objects of TDM PW parameters on a Provider Edge (PE) device. Unauthorized access to Nicklass Expires January 13, 2006 [Page 36] Internet-Draft Manage TDM over PSN July 2005 objects in these tables could result in disruption of traffic on the network. The use of stronger mechanisms such as SNMPv3 security should be considered where possible. Specifically, SNMPv3 VACM and USM MUST be used with any SNMPV3 agent, which implements this MIB module. Administrators should consider whether read access to these objects should be allowed, since read access may be undesirable under certain circumstances. Some of the readable objects in this MIB module "i.e., objects with a MAX-ACCESS other than not-accessible" may be considered sensitive or vulnerable in some network environments. It is thus important to control even GET and/or NOTIFY access to these objects and possibly to even encrypt the values of these objects when sending them over the network via SNMP. These are the tables and objects and their sensitivity/vulnerability: The pwVcTDMTable, pwVcTDMPerfCurrentTable, pwVcTDMPerfIntervalTable and pwVcTDMPerfTable collectively show the TDM pseudo wire connectivity topology and its performance characteristics. If an Administrator does not want to reveal this information, then these tables should be considered sensitive/vulnerable. SNMP versions prior to SNMPv3 did not include adequate security. Even if the network itself is secure "for example by using IPSec", even then, there is no control as to who on the secure network is allowed to access and GET/SET "read/change/create/delete" the objects in this MIB module. It is RECOMMENDED that implementers consider the security features as provided by the SNMPv3 framework "see [RFC3410], section 8", including full support for the SNMPv3 cryptographic mechanisms "for authentication and privacy". Further, deployment of SNMP versions prior to SNMPv3 is NOT RECOMMENDED. Instead, it is RECOMMENDED to deploy SNMPv3 and to enable cryptographic security. It is then a customer/operator responsibility to ensure that the SNMP entity giving access to an instance of this MIB module, is properly configured to give access to the objects only to those principals "users" that have legitimate rights to indeed GET or SET "change/create/delete" them. 10. IANA considerations As requested in the PW TC MIB [PWTC], PWE3 related standards track MIB modules should be rooted under the pwStdMIB subtree. The IANA is Nicklass Expires January 13, 2006 [Page 37] Internet-Draft Manage TDM over PSN July 2005 requested to assign { pwStdMIB 7 } to the PW TDM MIB module specified in this document. 11. References 11.1 Normative references [PWTDMREQ] M. Riegel, et al, "Requirements for Edge-to-Edge Emulation of TDM Circuits over Packet Switching Networks (PSN)", work in progress. [PWARCH] Bryant S., Pate P., "PWE3 Architecture", RFC 3985, March 2005 [SATOP] Vainshtein A.,Stein Y., "Structure-Agnostic TDM over Packet (SAToP)", work-in-progress. [TDMOIP] Y(J) SteinR. Shashoua, R. Insler, M. Anavi "TDM over IP", work in progress. [CESOPSN] Vainshtein A, ., et at., "Structured TDM Circuit Emulation Service over Packet Switched Network (CESoPSN)", work in progress. [TDMCP-EXT] Vainshtein A, Stein Y., "Control Protocol Extensions for Setup of TDM Pseudowires", work-in-progress. [PWMIB] Zelig D., Nadeau T., "Pseudo Wire (PW) Management Information Base", work-in-progress. [PWTC] Nadeau, T., Zelig D. "Definitions for Textual Conventions and OBJECT-IDENTITIES for Pseudo-Wires Management", work-in-progress. [DS1MIB] Nicklass O. " Definitions of Managed Objects for the DS1, E1, DS2 and E2 Interface Types", RFC 3895, September 2004 [DS3MIB] Nicklass O. "Definitions of Managed Objects for the DS3/E3 Interface Types", RFC 3896, September 2004 [RFC2494] Fowler, D., "Definitions of Managed Objects for the DS0 and DS0Bundle Interface Types", RFC 2494, January 1999. [RFC2863] McCloghrie, K. and F. Kastenholz, "The Interfaces Group MIB", RFC 2863, June 2000. Nicklass Expires January 13, 2006 [Page 38] Internet-Draft Manage TDM over PSN July 2005 [RFC2578] McCloghrie, K., Perkins, D., Schoenwaelder, J., Case, J., Rose, M. and S. Waldbusser, "Structure of Management Information Version 2 (SMIv2)", STD 58, RFC 2578, April 1999. [RFC2579] McCloghrie, K., Perkins, D., Schoenwaelder, J., Case, J., Rose, M. and S. Waldbusser, "Textual Conventions for SMIv2", STD 58, RFC 2579, April 1999. [RFC2580] McCloghrie, K., Perkins, D., Schoenwaelder, J., Case, J., Rose, M. and S. Waldbusser, "Conformance Statements for SMIv2", STD 58, RFC 2580, April 1999. [G.704] ITU-T Recommendation G.704 (10/98) - Synchronous frame structures used at 1544, 6312, 2048, 8448 and 44 736 Kbit/s hierarchical levels [ITU-T-G.826] ITU-T G.826: Error performance parameters and objectives forinternational, constant bit rate digital paths at or above theprimary rate, November 1993. 11.2 Informative references [RFC3410] Case, J., Mundy, R., Partain, D. and B. Stewart, "Introduction and Applicability Statements for Internet-Standard Management Framework", RFC 3410, December 2002. 12. Acknowledgements This document was produced by the PWE3 Working Group. Author's Address Orly Nicklass RAD Data Communications 24 Raoul Wallenberg St., Bldg C Tel Aviv 69719 ISRAEL Phone: +972 3 7659969 Email: orly_n@rad.com Nicklass Expires January 13, 2006 [Page 39] Internet-Draft Manage TDM over PSN July 2005 Intellectual Property Statement The IETF takes no position regarding the validity or scope of any Intellectual Property Rights or other rights that might be claimed to pertain to the implementation or use of the technology described in this document or the extent to which any license under such rights might or might not be available; nor does it represent that it has made any independent effort to identify any such rights. Information on the procedures with respect to rights in RFC documents can be found in BCP 78 and BCP 79. 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Disclaimer of Validity This document and the information contained herein are provided on an "AS IS" basis and THE CONTRIBUTOR, THE ORGANIZATION HE/SHE REPRESENTS OR IS SPONSORED BY (IF ANY), THE INTERNET SOCIETY AND THE INTERNET ENGINEERING TASK FORCE DISCLAIM ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Copyright Statement Copyright (C) The Internet Society (2005). This document is subject to the rights, licenses and restrictions contained in BCP 78, and except as set forth therein, the authors retain all their rights. Acknowledgment Funding for the RFC Editor function is currently provided by the Internet Society. Nicklass Expires January 13, 2006 [Page 40]