ATMF-CES

MIB Reference — IPNetwork Monitor

All MIBsATMF-CES

Organization: ATM Forum Circuit Emulation Working Group

Last Updated: 1996-11-05

Category: ATM

Description:

Manages ATM Forum Circuit Emulation Service (CES) configuration for carrying TDM traffic over ATM networks.

Imported Objects

From IF-MIB

InterfaceIndex

From RFC1155-SMI

enterprises

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

Counter32
Gauge32
MODULE-IDENTITY
OBJECT-TYPE

From SNMPv2-TC

RowStatus
TEXTUAL-CONVENTION

What Is ATMF-CES?

ATMF-CES is an ATM Forum standards-based, vendor-neutral MIB implementing the Circuit Emulation Service Interworking Function (CES IWF) version 2.0, used to carry constant-bit-rate (CBR) TDM traffic such as T1/E1 circuits transparently over an ATM network. It exposes per-circuit configuration and operational data through the atmfCESConfTable, covering ATM addressing (VPI/VCI), CBR service type, clocking mode, channel-associated signaling (CAS), buffer sizing, and cell-delay-variation tolerances. From a monitoring standpoint it is primarily a configuration/performance MIB for the emulated circuit's health: cell-delay-variation and buffer-size settings reveal whether jitter buffering is adequately tuned, while clock-mode and CAS settings confirm the circuit is correctly synchronized and signaling is passed through as expected—faults here manifest as circuit drops or bit errors rather than classic CPU/memory alarms. It depends on the broader ATM Forum MIB framework and interoperates with standard ATM interface MIBs for the underlying physical/ATM layer. It is typically deployed on ATM edge switches or CES interworking function devices that emulate leased-line/TDM circuits across an ATM backbone, and because the MIB is standards-based rather than proprietary, ATMF-CES SNMP polling scripts can typically be reused across ATM equipment from different vendors.

IPNetwork Monitor allows you to monitor SNMP objects defined in ATMF-CES. Use the built-in SNMP Monitoring Browser to explore available variables, view their current values and descriptions, and select the objects you want to monitor. You can then create SNMP monitors, configure thresholds, and receive alerts when monitored values change.

What Can Be Monitored

  • CBR service/clock mode configuration
  • ATM VPI/VCI mapping
  • cell delay variation tolerance
  • channel-associated signaling (CAS) status
  • jitter buffer size setting
  • partial cell fill setting

Supported Devices

  • vendor-neutral, standards-based MIB, not tied to a specific manufacturer
  • ATM edge switches / Circuit Emulation Interworking Function devices

Monitoring Examples

An operator would poll atmfCESConfTable/atmfCESConfEntry, checking atmfCESAtmVpi/atmfCESAtmVci to confirm the correct ATM virtual circuit mapping and atmfCESCbrClockMode to verify clock synchronization is set appropriately. Watching atmfCESCdvRxT (cell delay variation) alongside atmfCESBufMaxSize reveals whether the jitter buffer is undersized for observed network delay variation, which would manifest as choppy TDM circuit quality. atmfCESCas indicates whether channel-associated signaling is enabled, important for voice circuits riding the emulated CBR service.

OIDs
OID symbolicOID numericTypeAccessDescription
atmForum1.3.6.1.4.1.353
atmForumNetworkManagement1.3.6.1.4.1.353.5
atmfCESmib1.3.6.1.4.1.353.5.2
atmfCES1.3.6.1.4.1.353.5.2.2The MIB module used to describe the Circuit Emulation Interworking Function (Version 2.0)
atmfCESObjects1.3.6.1.4.1.353.5.2.2.1
atmfCESConfTable1.3.6.1.4.1.353.5.2.2.1.1not-accessibleThe CES configuration table used to manage interworking between CBR interfaces or channels and ATM Virtual Channel Links (VCLs). The reverse mapping is shown in the atmfCESMappingTable.
atmfCESConfEntry1.3.6.1.4.1.353.5.2.2.1.1.1not-accessibleAn entry in the CES configuration table. There is one entry in the table per CES entity, mapping one CBR interface, channel, or bundle to an ATM VCL. Creation of a row in this table with a non-zero atmfCESAtmIndex causes a corresponding entry in the atmVclTable of the ATM-MIB (RFC1695) to be created.
NUM atmfCESCbrIndex1.3.6.1.4.1.353.5.2.2.1.1.1.1InterfaceIndexnot-accessibleThe value of this object is equal to MIB II's ifIndex value of the CBR interface, channel, or bundle that is being cross-connected to an ATM VCL.
CES atmfCESAtmIndex1.3.6.1.4.1.353.5.2.2.1.1.1.2CESConnectionPortread-createThe value of this object is equal to MIB II's ifIndex value of the ATM Port interface mapped through this CES IWF to a CBR interface. This value is overwritten whenever an active or passive SVC is established. The distinguished value zero indicates that no ATM interface has been specified.
NUM atmfCESAtmVpi1.3.6.1.4.1.353.5.2.2.1.1.1.3VpiIntegerread-createThe value of this object is equal to the VPI used by the ATM VCL mapped through this CES IWF to a CBR interface. This value is overwritten whenever an active or passive SVC is established. The value is not relevant if no ATM interface has been specified (i.e., atmfCESAtmIndex is set to zero).
NUM atmfCESAtmVci1.3.6.1.4.1.353.5.2.2.1.1.1.4VciIntegerread-createThe value of this object is equal to the VCI used by the ATM VCL mapped through this CES IWF to a CBR interface. This value is overwritten whenever an active or passive SVC is established. The distinguished value zero indicates that no ATM VCL has been specified.
INT atmfCESCbrService1.3.6.1.4.1.353.5.2.2.1.1.1.5INTEGERread-createDefine if DSx/Ex service isas structured or unstructurednot. A structured(2) interface is some nx64kbKbps. An unstructured (1) interface is 1.544Mbps, 2.048Mbps, 6.312Mbps, 44.736 Mbps, or 34.368 Mbps. unstructured(1) passes all bits through the ATM network. strucutured(2) passes data bits through the ATM network, and may also pass signalling bits At this time, only unstructured mode is defined for the 44.736 Mbps and 34.368 Mbps services.
INT atmfCESCbrClockMode1.3.6.1.4.1.353.5.2.2.1.1.1.6INTEGERread-createDefine if DSx/Ex service clocking mode. This maps into transmit clock source of CBR interface. For structured modes this value, if present, must be set to synchronous(1).
INT atmfCESCas1.3.6.1.4.1.353.5.2.2.1.1.1.7INTEGERread-createThis parameter selects which AAL1 Format should be used: Basic does not carry CAS bits, and uses a single 125 usec frame. e1Cas, ds1SfCas, dS1EsfCas and j2Cas carry CAS bits in a multiframe structure for E1, DS1 SF, DS1 ESF and J2 respectively. This applies to structured interfaces only. Default is basic (1). For unstructured interfaces this value, if present, must be set to the default of basic (1).
INT atmfCESPartialFill1.3.6.1.4.1.353.5.2.2.1.1.1.8INTEGERread-createIf partial cell fill is used, the number of user octets per cell must be set with this parameter. Setting this parameter to zero disables partial cell fill, and causes all cells to be completely filled before they are sent.
INT atmfCESBufMaxSize1.3.6.1.4.1.353.5.2.2.1.1.1.9INTEGERread-createDefine maximum size in 10 microsecond increments of the reassembly buffer. Some implementations may want allow the maximum buffer size to be programmed to a size less than the physical limit to reduce the maximum delay through a circuit.
INT atmfCESCdvRxT1.3.6.1.4.1.353.5.2.2.1.1.1.10INTEGERread-createThe maximum cell arrival jitter in 10 usec increments that the reassembly process will tolerate in the cell stream without producing errors on the CBR service interface.
INT atmfCESCellLossIntegrationPeriod1.3.6.1.4.1.353.5.2.2.1.1.1.11INTEGERread-createThe time in milliseconds for the cell loss integration period. If a cells are continuously lost for this period of time, atmfCESCellLossStatus is set to loss (2). The default definition is 2500.
INT atmfCESConnType1.3.6.1.4.1.353.5.2.2.1.1.1.12INTEGERread-createThe type of ATM connectivity between associated CES IWF's. Valid values are: other - none of the types specified below pvc - supporting connectivity is a permanent virtual connection activeSvc - attempt calls whenever none established passiveSvc - accept calls
ATM atmfCESLocalAddr1.3.6.1.4.1.353.5.2.2.1.1.1.13AtmAddrread-createThe ATM address of the local CES IWF process. This address may be used by the automatic SVC establishment procedures to identify the intended recipient CES IWF of an incoming automatic SVC call request. Optionally, the MAX-ACCESS of this object may be read-only, for those implementations where it is not desired to manually configure this address.
INT atmfCESAdminStatus1.3.6.1.4.1.353.5.2.2.1.1.1.14INTEGERread-createThe desired administrative status of the CES interworking function. The up and down states indicate that the traffic flow is enabled or disabled respectively across the CES interworking function.
INT atmfCESOperStatus1.3.6.1.4.1.353.5.2.2.1.1.1.15INTEGERread-onlyThe operational status of the CES interworking function. The up and down states indicate that the traffic flow is enabled or disabled respectively across the CES interworking function. The unknown state indicates that the state of the CES interworking function cannot be determined. The state will be down or unknown if the supporting CBR or ATM interfaces are down or unknown, respectively.
ROW atmfCESConfRowStatus1.3.6.1.4.1.353.5.2.2.1.1.1.16RowStatusread-createThis object is used to create new rows in this table, modify existing rows, and to delete existing rows.
atmfCESMappingTable1.3.6.1.4.1.353.5.2.2.1.2not-accessibleThe CES mapping table used to show the mapping from ATM VCLs to CBR interfaces or channels. The mapping and interworking functions are configured in the atmfCESConfTable.
atmfCESMappingEntry1.3.6.1.4.1.353.5.2.2.1.2.1not-accessibleAn entry in the CES mapping table. There is one entry in the table corresponding to each active row in the atmfCESConfTable for which there is a non-zero atmfCESAtmIndex.
NUM atmfCESMappingCbrIndex1.3.6.1.4.1.353.5.2.2.1.2.1.1InterfaceIndexread-onlyThe value of this object is equal to MIB II's ifIndex value of the CBR interface, channel, or bundle that is being cross-connected to an ATM VCL. Examples of the ifType value for the CBR entity are ds1(18), ds3(30), ds0(81), or ds0bundle(82).
atmfCESStatsTable1.3.6.1.4.1.353.5.2.2.1.3not-accessibleThe CES AAL1 statistical data table.
atmfCESStatsEntry1.3.6.1.4.1.353.5.2.2.1.3.1not-accessibleAn entry in the CES AAL1 Stats table. There is one entry in this table corresponding to each entry in the atmfCESConfTable.
C32 atmfCESReassCells1.3.6.1.4.1.353.5.2.2.1.3.1.1Counter32read-onlyThis count gives the number of cells played out to the CES Service Interface. It excludes cells that were discarded for any reason, including cells that were not used due to being declared misinserted, or discarded while the reassembler was waiting to achieve synchronization.
C32 atmfCESHdrErrors1.3.6.1.4.1.353.5.2.2.1.3.1.2Counter32read-onlyThe count of the number of AAL1 header errors detected, including those corrected. Header errors include correctable and uncorrectable CRC, plus bad parity.
C32 atmfCESPointerReframes1.3.6.1.4.1.353.5.2.2.1.3.1.3Counter32read-onlyThis records the count of the number of events in which the AAL1 reassembler found that an SDT pointer is not where it is expected, and the pointer must be reacquired. This count is only meaningful for structured CES modes, as unstructured CES modes do not use pointers. For unstructured CES modes, this count, if present, should indicate zero.
C32 atmfCESPointerParityErrors1.3.6.1.4.1.353.5.2.2.1.3.1.4Counter32read-onlyThis records the count of the number of events in which the AAL1 reassembler detects a parity check failure at the point where a structured data pointer is expected. This count is only meaningful for structured CES modes, as unstructured CES modes do not use pointers. For unstructured CES modes, this count, if present, should indicate zero.
C32 atmfCESAal1SeqErrors1.3.6.1.4.1.353.5.2.2.1.3.1.5Counter32read-onlyNumber of times that the sequence number of an incoming AAL1 Type 1 SAR-PDU causes a transition from the 'sync' state to the 'out of sequence' state, as defined by ITU-T I.363.1.
C32 atmfCESLostCells1.3.6.1.4.1.353.5.2.2.1.3.1.6Counter32read-onlyNumber of lost cells, as detected by the AAL1 sequence number processing, for example. This records the count of the number of cells detected as lost in the network prior to the destination CES IWF AAL1 layer processing.
C32 atmfCESMisinsertedCells1.3.6.1.4.1.353.5.2.2.1.3.1.7Counter32read-onlyNumber of AAL1 sequence violations which the AAL Convergence sublayer interprets as a misinserted cell, as defined by ITU-T I.363.1.
C32 atmfCESBufUnderflows1.3.6.1.4.1.353.5.2.2.1.3.1.8Counter32read-onlyNumber of buffer underflows. This records the count of the number of times the CES reassembly buffer underflows. In the case of a continuous underflow caused by a loss of ATM cell flow, a single buffer underflow should be counted. If the CES IWF is implemented with multiple buffers (such as a cell level buffer and a bit level buffer), then either buffer underflow will cause this count to be incremented.
C32 atmfCESBufOverflows1.3.6.1.4.1.353.5.2.2.1.3.1.9Counter32read-onlyNumber of buffer overflows. This records the count of the number of times the CES reassembly buffer overflows. If the CES IWF is implemented with multiple buffers (such as a cell level buffer and a bit level buffer, then either buffer overflow will cause this count to be incremented
INT atmfCESCellLossStatus1.3.6.1.4.1.353.5.2.2.1.3.1.10INTEGERread-onlyWhen cells are continuously lost for the number of milliseconds specified by atmfCESCellLossIntegrationPeriod, the value is set to loss (2). When cells are no longer lost, the value is set to noLoss (1).
atmfCESActiveSvcTable1.3.6.1.4.1.353.5.2.2.1.4not-accessibleThe table used to manage active SVCs established across ATM networks between CES entities.
atmfCESActiveSvcEntry1.3.6.1.4.1.353.5.2.2.1.4.1not-accessibleAn entry in the CES active SVC table. There is one entry in the table corresponding to each active row in the atmfCESConfTable for which the atmfCESConnType takes the value 'activeSvc'.
ATM atmfCESRemoteAddr1.3.6.1.4.1.353.5.2.2.1.4.1.1AtmAddrread-writeThe ATM address supporting the corresponding far end CES IWF process. If no address is supplied, no attempts to establish the active SVC are initiated.
INT atmfCESFirstRetryInterval1.3.6.1.4.1.353.5.2.2.1.4.1.2INTEGERread-writeThe time to wait before attempting to establish the SVC after the first failed call attempt. The time to wait between subsequent call attempts may differ to implement a backoff scheme. Zero represents an infinite interval indicating no retries.
INT atmfCESRetryTimer1.3.6.1.4.1.353.5.2.2.1.4.1.3INTEGERread-onlyIndicates the current value of the retry timer for this connection. When the value reaches zero an attempt will be made to establish the active SVC. When the timer is not running, the value zero shall be returned.
INT atmfCESRetryLimit1.3.6.1.4.1.353.5.2.2.1.4.1.4INTEGERread-writeSets a maximum limit on how many consecutive unsuccessful call setup attempts can be made before stopping the attempt to set up the connection. If this limit is reached then management action will be required (e.g. setting atmfCESActiveSvcRestart to 'restart') to initiate a new attempt to establish the connection. A value of zero indicates no limit - the attempts will continue until successful. If this object is not present, no limit on call attempts is assumed.
G32 atmfCESRetryFailures1.3.6.1.4.1.353.5.2.2.1.4.1.5Gauge32read-onlyIndicates how many attempts to establish the connection have failed. This count is reset whenever a connection is successfully established or the active SVC is restarted.
INT atmfCESActiveSvcRestart1.3.6.1.4.1.353.5.2.2.1.4.1.6INTEGERread-writeWhen the value is set to 'restart' the active SVC is released if necessary and a new setup procedure is begun. As a result of this action, the atmfCESActiveSvcOperStatus object transitions to 'establishmentInProgress' (if not already in this state) and the atmfCESRetryFailures object is cleared. When the value is set to 'noop' no operation is performed. When read, the value 'noop' is returned.
INT atmfCESActiveSvcOperStatus1.3.6.1.4.1.353.5.2.2.1.4.1.7INTEGERread-onlyDescribes the status of the active SVC. Valid values are: other - none of the types specified below establishmentInProgress - connection is not operational, but call attempts are ongoing connected - connection is currently operational retriesExhausted - retry limit has been reached and call attempts have ceased noAddressSupplied - no remote address has been configured, so no call attempts are initiated lowerLayerDown - underlying CES IWF is not operational When the row is not 'active', the value of this object is 'other'.
INT atmfCESLastReleaseCause1.3.6.1.4.1.353.5.2.2.1.4.1.8INTEGERread-onlyValue of the Cause field of the Cause information element in the last RELEASE signalling message received for this active SVC. Indicates the reason for the release.
OCT atmfCESLastReleaseDiagnostics1.3.6.1.4.1.353.5.2.2.1.4.1.9OCTET STRINGread-onlyValue of the first 8 bytes of diagnostic information from the Cause field of the Cause information element in the last RELEASE signalling message received for this active SVC.
atmfCESConformance1.3.6.1.4.1.353.5.2.2.2
atmfCESGroups1.3.6.1.4.1.353.5.2.2.2.1
atmfCESBasicConfigGroup1.3.6.1.4.1.353.5.2.2.2.1.1A collection of objects providing configuration information for generic Circuit Emulation Service IWFs.
atmfCESOptionalConfigGroup1.3.6.1.4.1.353.5.2.2.2.1.2A collection of optional objects providing configuration information for generic Circuit Emulation Service IWFs.
atmfCESBasicStatsGroup1.3.6.1.4.1.353.5.2.2.2.1.3A collection of objects providing statistics information for generic Circuit Emulation Service IWFs.
atmfCESOptionalStatsGroup1.3.6.1.4.1.353.5.2.2.2.1.4A collection of optional objects providing statistics information for generic Circuit Emulation Service IWFs.
atmfCESStructConfigGroup1.3.6.1.4.1.353.5.2.2.2.1.5A collection of objects providing configuration information for Structured DS1, E1 or J2 Nx64 kbit/s Service IWFs.
atmfCESStructStatsGroup1.3.6.1.4.1.353.5.2.2.2.1.6A collection of objects providing statistics information for Structured DS1, E1 or J2 Nx64 kbit/s Service IWFs.
atmfCESOptionalStructStatsGroup1.3.6.1.4.1.353.5.2.2.2.1.7A collection of optional objects providing statistics information for Structured DS1, E1 or J2 Nx64 kbit/s Service IWFs.
atmfCESMappingGroup1.3.6.1.4.1.353.5.2.2.2.1.8A collection of objects providing information about the mapping from ATM VCLs to CBR interfaces or channels.
atmfCESSvcConfigGroup1.3.6.1.4.1.353.5.2.2.2.1.9A collection of objects providing SVC connection establishment support configuration information for CES IWFs.
atmfCESOptionalSvcConfigGroup1.3.6.1.4.1.353.5.2.2.2.1.10A collection of optional objects providing SVC connection establishment support configuration information for CES IWFs.
atmfCESCompliances1.3.6.1.4.1.353.5.2.2.2.2
atmfCESCompliance1.3.6.1.4.1.353.5.2.2.2.2.1The compliance statement for SNMP entities which support the ATM Forum Circuit Emulation Services.

RFC description

ATM Forum DS1/E1 Circuit Emulation Specification MIB for managing ATM circuit emulation interworking function objects, mapping CBR interfaces to ATM VPI/VCI.

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