ECLAPBEXT-MIB

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Category: Protocol: ATM, Protocol: X.25

Description: Extended LAPB (Link Access Procedure Balanced) MIB providing vendor-specific extensions for LAPB protocol management.

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What Is ECLAPBEXT-MIB?

ECLAPBEXT-MIB is a vendor-specific (Eicon Technology) extension MIB for the LAPB (Link Access Procedure, Balanced) X.25 data-link protocol, providing per-port protocol counters beyond the standard base LAPB MIB. It exposes performance/fault counters for the LAPB link-layer state machine - counts of retransmissions and of specific control frames (SABM, DISC, DM, RNR) sent and received on each port. These counters serve to monitor the health of a LAPB/X.25 link: rising retransmission counts or unexpected DISC/DM frame activity indicate link instability, a misbehaving peer, or physical-layer problems, effectively functioning as a fault/performance monitoring tool for the WAN link's software protocol state rather than the hardware itself. It extends/complements the standard base LAPB MIB rather than replacing it, sitting under Eicon's private enterprise MIB tree. It was deployed on Eicon WAN adapters/routers providing X.25 connectivity, a now-legacy technology. Engineers can download the ECLAPBEXT-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in ECLAPBEXT-MIB. 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.

Supported Devices

Eicon WAN adapter/router (X.25/LAPB interface)

Monitoring Examples

lapbCountersTable/lapbCountEntry, indexed by lapbCountPortRef, exposes lapbCountRetransmis - a climbing retransmission count on a given port signals an unstable or noisy X.25 link. lapbCountSABMTxs and lapbCountSABMRxs track link Set-Asynchronous-Balanced-Mode establishment attempts, so repeated SABM transmissions without matching responses would show up as link-setup failures. lapbCountDISCTxs/lapbCountDISCRxs and lapbCountDMsTxs/lapbCountDMsRxs reveal link disconnect and disconnected-mode events, letting an admin correlate a spike in these counters with a reported WAN outage on that port, while lapbCountRNRsTxs/RNRsRxs flag flow-control (Receiver Not Ready) conditions.

What Can Be Monitored

retransmission count per port
SABM frames sent/received
DISC frames sent/received
DM frames sent/received
RNR (flow control) frames sent/received

Imported Objects

From RFC-1212

OBJECT-TYPE

From RFC-1215

TRAP-TYPE

From RFC1155-SMI

Counter
enterprises

OIDs

OID symbolic	OID numeric	Type	Access	Description
eicon	1.3.6.1.4.1.434
lapbBandwidthEntry	1.3.6.1.4.1.434.2.2.4.1.2.1		not-accessible	The set of configurable and informational parameters to support the bandwidth traps for each lapb interface
INT lapbBandwidthHigh	1.3.6.1.4.1.434.2.2.4.1.2.1.2	INTEGER	read-write	The higher configurable threshold for the lapbTrapBandwidthShortage. If the percentage of bandwidth being used exceeds this amount over a configurable number of seconds (lapbBandwidthSecs) for a configurable number of consecutive periods, (lapbBandwidthNumPeriods), then the trap is sent and the lapbBandwidthTrapsStatus is changed accordingly
INT lapbBandwidthIndex	1.3.6.1.4.1.434.2.2.4.1.2.1.1	INTEGER	read-only	The identifier of the EiconPort assigned by the agent.
INT lapbBandwidthLow	1.3.6.1.4.1.434.2.2.4.1.2.1.3	INTEGER	read-write	The lower configurable threshold for the lapbTrapBandwidthClear. If the percentage of bandwidth being used drops below this amount, subsequent to a lapbTrapBandwidthShortage, then the trap is sent and the lapbBadwidthTrapsStatus is changed accordingly. Note that this value MUST be below that for labpBandwidthHigh
INT lapbBandwidthNumPeriods	1.3.6.1.4.1.434.2.2.4.1.2.1.5	INTEGER	read-write	The number of consecutive periods, each of length lapbBandwidthSecs seconds, that the condition must be present for before the lapbBandwidthShortage trap is sent.
INT lapbBandwidthRxInUse	1.3.6.1.4.1.434.2.2.4.1.2.1.8	INTEGER	read-only	The percentage of bandwidth that is currently in use receiving incoming traffic.
INT lapbBandwidthSecs	1.3.6.1.4.1.434.2.2.4.1.2.1.4	INTEGER	read-write	The number of seconds over which the bandwidth is calculated.
lapbBandwidthTable	1.3.6.1.4.1.434.2.2.4.1.2		not-accessible	The table of configurable and informational parameters with respect to the bandwidth traps for lapb interfaces
INT lapbBandwidthTrapState	1.3.6.1.4.1.434.2.2.4.1.2.1.6	INTEGER	read-write	This variable indicates whether the agent should generate the lapbTrapBandwidthShortage and lapbTrapBandwidthClear traps if the relevant conditions arise. Set this value to disabled to stop these traps being generated
BAN lapbBandwidthTrapStatus	1.3.6.1.4.1.434.2.2.4.1.2.1.7	BandwidthStatus	read-only	The status of the bandwidth traps. This value should be polled to determine whether or not the bandwidth shortage condition is present and a trap has been sent.
INT lapbBandwidthTxInUse	1.3.6.1.4.1.434.2.2.4.1.2.1.9	INTEGER	read-only	The percentage of bandwidth that is currently in use transmitting outgoing traffic.
CTR lapbCountAbortRxs	1.3.6.1.4.1.434.2.2.4.1.1.1.20	Counter	read-only	The number of frames received with Abort indication.
CTR lapbCountAbortTxs	1.3.6.1.4.1.434.2.2.4.1.1.1.19	Counter	read-only	The number of frames sent with Abort indication.
CTR lapbCountBadCRCRxs	1.3.6.1.4.1.434.2.2.4.1.1.1.18	Counter	read-only	The number of frames received with bad CRC.
CTR lapbCountBadCRCTxs	1.3.6.1.4.1.434.2.2.4.1.1.1.17	Counter	read-only	The number of frames sent with bad CRC.
CTR lapbCountBadTypeRxs	1.3.6.1.4.1.434.2.2.4.1.1.1.22	Counter	read-only	The number of Unknown frames received.
CTR lapbCountBadTypeTxs	1.3.6.1.4.1.434.2.2.4.1.1.1.21	Counter	read-only	The number of Unknown frames sent.
CTR lapbCountDISCRxs	1.3.6.1.4.1.434.2.2.4.1.1.1.6	Counter	read-only	The number of Disconnect frames received
CTR lapbCountDISCTxs	1.3.6.1.4.1.434.2.2.4.1.1.1.5	Counter	read-only	The number of Disconnect frames sent
CTR lapbCountDMsRxs	1.3.6.1.4.1.434.2.2.4.1.1.1.8	Counter	read-only	The number of Disconnected Mode frames received
CTR lapbCountDMsTxs	1.3.6.1.4.1.434.2.2.4.1.1.1.7	Counter	read-only	The number of Disconnected Mode frames sent
lapbCountEntry	1.3.6.1.4.1.434.2.2.4.1.1.1		not-accessible	The set of counters for one port. Can be reset to 0.
lapbCountersTable	1.3.6.1.4.1.434.2.2.4.1.1		not-accessible	Runtime counters table, one row per port
CTR lapbCountFRMRRxs	1.3.6.1.4.1.434.2.2.4.1.1.1.16	Counter	read-only	The number of Frame Reject frames received.
CTR lapbCountFRMRTxs	1.3.6.1.4.1.434.2.2.4.1.1.1.15	Counter	read-only	The number of Frame Reject frames sent.
CTR lapbCountInfoFrameRxs	1.3.6.1.4.1.434.2.2.4.1.1.1.24	Counter	read-only	The number of Information frames received.
CTR lapbCountInfoFrameTxs	1.3.6.1.4.1.434.2.2.4.1.1.1.23	Counter	read-only	The number of Information frames sent.
CTR lapbCountOverrun	1.3.6.1.4.1.434.2.2.4.1.1.1.26	Counter	read-only	The number of times that the EiconCard could not handle incoming frames.
INT lapbCountPortRef	1.3.6.1.4.1.434.2.2.4.1.1.1.1	INTEGER	read-only	The port number, the same as lapbParmPortRef from the lapbParmTable.
CTR lapbCountRetransmis	1.3.6.1.4.1.434.2.2.4.1.1.1.2	Counter	read-only	The number of times a frame has been retransmitted
CTR lapbCountRNRsRxs	1.3.6.1.4.1.434.2.2.4.1.1.1.10	Counter	read-only	The number of Receiver Not Ready frames received
CTR lapbCountRNRsTxs	1.3.6.1.4.1.434.2.2.4.1.1.1.9	Counter	read-only	The number of Receiver Not Ready frames sent
CTR lapbCountRRRxs	1.3.6.1.4.1.434.2.2.4.1.1.1.14	Counter	read-only	The number of Receiver Ready frames received.
CTR lapbCountRRTxs	1.3.6.1.4.1.434.2.2.4.1.1.1.13	Counter	read-only	The number of Receiver Ready frames transmitted.
CTR lapbCountSABMRxs	1.3.6.1.4.1.434.2.2.4.1.1.1.4	Counter	read-only	The number of Set Asynchronous Balanced Mode frames received
CTR lapbCountSABMTxs	1.3.6.1.4.1.434.2.2.4.1.1.1.3	Counter	read-only	The number of Set Asynchronous Balanced Mode frames sent
CTR lapbCountUARxs	1.3.6.1.4.1.434.2.2.4.1.1.1.12	Counter	read-only	The number of Unnumbered Acknowledgement frames received.
CTR lapbCountUATxs	1.3.6.1.4.1.434.2.2.4.1.1.1.11	Counter	read-only	The number of Unnumbered Acknowledgement frames transmitted.
CTR lapbCountUnderrun	1.3.6.1.4.1.434.2.2.4.1.1.1.25	Counter	read-only	The number of times that more frames have been transmitted than the receiver can handle.
CTR lapbCountXIDRxs	1.3.6.1.4.1.434.2.2.4.1.1.1.28	Counter	read-only	The number of Exchange Station Identification frames received.
CTR lapbCountXIDTxs	1.3.6.1.4.1.434.2.2.4.1.1.1.27	Counter	read-only	The number of Exchange Station Identification frames sent.
lapbext	1.3.6.1.4.1.434.2.2.4.1
CTR lapbFlowBusyDefers	1.3.6.1.4.1.434.2.2.4.1.4.1.5	Counter	read-only	The number of times this device was unable to transmit a frame due to a perceived remote busy condition. Busy conditions can result from the receipt of an RNR from the remote device, the lack of valid sequence number space (window saturation), or other conditions.
INT lapbFlowChangeReason	1.3.6.1.4.1.434.2.2.4.1.4.1.3	INTEGER	read-only	The reason for the most recent incrementing of lapbFlowStateChanges. A DM or DISC frame generated to initiate link set-up does not alter this object. When the MIB-II object ifOperStatus does not have a value of testing, there exists a correlation between this object and ifOperStatus. IfOperStatus will have a value of up when this object contains: abmEntered, abmeEntered, abmReset, or abmeReset. IfOperStatus will have a value of down when this object has a value of notStarted, or dmReceived through n2Timeout. There is no correlation when this object has the value other.
INT lapbFlowCurrentMode	1.3.6.1.4.1.434.2.2.4.1.4.1.4	INTEGER	read-only	The current condition of the conversation.
lapbFlowEntry	1.3.6.1.4.1.434.2.2.4.1.4.1		not-accessible	The information regarding the effects of flow controls in LAPB.
OCT lapbFlowFrmrReceived	1.3.6.1.4.1.434.2.2.4.1.4.1.10	OCTET STRING	read-only	The Information Field of the FRMR most recently received. If no FRMR has been received (the normal case) or the information isn't available, this will be an OCTET STRING of zero length.
OCT lapbFlowFrmrSent	1.3.6.1.4.1.434.2.2.4.1.4.1.9	OCTET STRING	read-only	The Information Field of the FRMR most recently sent. If no FRMR has been sent (the normal case) or the information isn't available, this will be an OCTET STRING of zero length.
IFI lapbFlowIfIndex	1.3.6.1.4.1.434.2.2.4.1.4.1.1	IfIndexType	read-only	The ifIndex value for the LAPB Interface.
CTR lapbFlowRejInPkts	1.3.6.1.4.1.434.2.2.4.1.4.1.7	Counter	read-only	The number of REJ or SREJ frames received by this station.
CTR lapbFlowRejOutPkts	1.3.6.1.4.1.434.2.2.4.1.4.1.6	Counter	read-only	The number of REJ or SREJ frames sent by this station.
CTR lapbFlowStateChanges	1.3.6.1.4.1.434.2.2.4.1.4.1.2	Counter	read-only	The number of LAPB State Changes, including resets.
CTR lapbFlowT1Timeouts	1.3.6.1.4.1.434.2.2.4.1.4.1.8	Counter	read-only	The number of times a re-transmission was effected by the T1 Timer expiring.
lapbFlowTable	1.3.6.1.4.1.434.2.2.4.1.4		not-accessible	This table defines the objects recorded by LAPB to provide information about the traffic flow through the interface.
OCT lapbFlowXidReceived	1.3.6.1.4.1.434.2.2.4.1.4.1.11	OCTET STRING	read-only	The Information Field of the XID frame most recently received. If no XID frame has been received, this will be an OCTET STRING of zero length.
INT lapbOperControlField	1.3.6.1.4.1.434.2.2.4.1.3.1.3	INTEGER	read-only	The current operating size of the sequence numbers used to number frames.
lapbOperEntry	1.3.6.1.4.1.434.2.2.4.1.3.1		not-accessible	Currently set parameter values for a specific LAPB.
IFI lapbOperIndex	1.3.6.1.4.1.434.2.2.4.1.3.1.1	IfIndexType	read-only	The ifIndex value for the LAPB interface.
INT lapbOperN2RxmitCount	1.3.6.1.4.1.434.2.2.4.1.3.1.8	INTEGER	read-only	The current N2 retry counter used for this interface. This specifies the number of times a PDU will be resent after the T1 timer expires without an acknowledgement for the PDU.
OID lapbOperPortId	1.3.6.1.4.1.434.2.2.4.1.3.1.13	OBJECT IDENTIFIER	read-only	This object identifies an instance of the index object in the first group of objects in the MIB specific to the physical device or interface used to send and receive frames. If an agent does not support any such objects, it should return nullSpec OBJECT IDENTIFIER {0 0}.
OID lapbOperProtocolVersionId	1.3.6.1.4.1.434.2.2.4.1.3.1.14	OBJECT IDENTIFIER	read-only	This object identifies the version of the lapb protocol implemented by this interface.
INT lapbOperReceiveKWindowSize	1.3.6.1.4.1.434.2.2.4.1.3.1.7	INTEGER	read-only	The current receive PDU window size for this Interface. This is the maximum number of unacknowledged sequenced PDUs that may be outstanding from the DCE/remote DTE at any one time.
NUM lapbOperReceiveN1FrameSize	1.3.6.1.4.1.434.2.2.4.1.3.1.5	PositiveInteger	read-only	The current operating N1 frame size used for the maximum number of bits in a frame the DCE/remote DTE can transmit. This excludes flags and 0 bits inserted for transparency.
INT lapbOperStationType	1.3.6.1.4.1.434.2.2.4.1.3.1.2	INTEGER	read-only	Identifies the current operating station type of this interface. A value of dxe (3) indicates XID negotiation has not yet taken place.
NUM lapbOperT1AckTimer	1.3.6.1.4.1.434.2.2.4.1.3.1.9	PositiveInteger	read-only	The current T1 timer for this interface. This specifies the maximum time in Milliseconds to wait for acknowledgment of a PDU.
NUM lapbOperT2AckDelayTimer	1.3.6.1.4.1.434.2.2.4.1.3.1.10	PositiveInteger	read-only	The current T2 timer for this interface. This specifies the maximum time in Milliseconds to wait before sending an acknowledgment for a sequenced PDU. A value of zero means there will be no delay in acknowledgement generation.
NUM lapbOperT3DisconnectTimer	1.3.6.1.4.1.434.2.2.4.1.3.1.11	PositiveInteger	read-only	The current T3 timer for this interface. This specifies the time in Milliseconds to wait before considering the link disconnected. A value of zero indicates the link will be considered disconnected upon completion of the frame exchange to disconnect the link.
NUM lapbOperT4IdleTimer	1.3.6.1.4.1.434.2.2.4.1.3.1.12	PositiveInteger	read-write	The current T4 timer for this interface. This specifies the maximum time in Milliseconds to allow without frames being exchanged on the data link. A value of 2147483647 indicates no idle timer is being kept.
lapbOperTable	1.3.6.1.4.1.434.2.2.4.1.3		not-accessible	This table contains configuration information about interface parameters currently set in the interface. Many of these objects have corresponding objects in the lapbAdmnTable.
INT lapbOperTransmitKWindowSize	1.3.6.1.4.1.434.2.2.4.1.3.1.6	INTEGER	read-only	The current PDU window size this Interface uses to transmit. This is the maximum number of unacknowledged sequenced PDUs that may be outstanding from this DTE at any one time.
NUM lapbOperTransmitN1FrameSize	1.3.6.1.4.1.434.2.2.4.1.3.1.4	PositiveInteger	read-only	The current operating N1 frame size used for the maximum number of bits in a frame this DTE can transmit. This excludes flags and 0 bits inserted for transparency.
NTF lapbTrapBandwidthClear	1.3.6.1.4.1.434.0.412			This trap indicates that the condition causing a previous lapbTrapBandwidthShortage no longer applies; in particular that the bandwidth being used on the specified port has dropped to below lapbBandwidthLow percent over the last lapbBandwidthSecs number of seconds The final parameter indicates the direction(s) in which the bandwidth exceeded condition has been cleared
NTF lapbTrapBandwidthShortage	1.3.6.1.4.1.434.0.411			This trap indicates that the amount of bandwidth used on the specified port has risen above lapbBandwidthHigh percent over lapbBandwidthNumPeriods of lapbBandwidthSecs. The next two parameters indicate the percentage of the total bandwidth used in each direction (Transmitting or Receiving) over the last lapbBandwidthSecs number of seconds. The final parameter indicates the direction(s) in which the bandwidth threshold has been exceeded
management	1.3.6.1.4.1.434.2
mibv2	1.3.6.1.4.1.434.2.2

RFC description

Eicon vendor-private MIB extending LAPB (Link Access Procedure Balanced) line protocol management with bandwidth monitoring.

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What Is ECLAPBEXT-MIB?

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Monitoring Examples

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RFC description