CXBsc-MIB

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Category: Domain: SNA/Legacy, Domain: WAN, Vendor: Memotec

Description: Manages BSC (Binary Synchronous Communications) protocol configuration on CX Memotec devices.

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What Is CXBsc-MIB?

CXBsc-MIB is a vendor MIB from Memotec (CX product line) for managing BSC (Binary Synchronous Communications), a legacy IBM synchronous data-link protocol used to connect mainframe and terminal equipment over WAN links. It exposes SAP (service access point) configuration objects describing interface type, protocol alias/companion relationships, SNA/LC reference, polling timers, and operational mode and link status. For hardware/software status monitoring, its key fields are bscSapLinkStatus (is the BSC link currently up) and bscSapLinkChange (notification of link state transitions), along with bscSapOperationalMode reflecting the current running mode of the SAP. It operates as protocol-specific extension alongside Memotec's broader device/interface MIB tree rather than a standards-track MIB, since BSC predates modern IETF SNMP conventions. It is deployed in legacy environments bridging IBM BSC/SNA traffic over modern WAN links via Memotec protocol converters. Engineers can download the CXBsc-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in CXBsc-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

Memotec CX BSC/SNA protocol converter

Monitoring Examples

An operator would poll bscSapTable/bscSapEntry, keyed by bscSapType and bscSapInterfaceType, to check bscSapLinkStatus for each configured BSC SAP and catch a link that has gone down. bscPollIntAfterAckTimer would be reviewed when diagnosing slow or timing-out BSC polling cycles to a downstream terminal cluster. bscSapLinkChange traps let an admin react immediately to a BSC link transition rather than waiting for the next polling cycle, and bscSapOperationalMode confirms the SAP is running in the expected mode after a configuration change via bscSapControl.

What Can Be Monitored

BSC link status
SAP operational mode
polling timer configuration
link state change traps
interface/protocol type

Imported Objects

From CXProduct-SMI

Alias
SapIndex
cxBsc	OBJECT-IDENTITY

From RFC-1212

OBJECT-TYPE

From RFC1155-SMI

Counter
TimeTicks

OIDs

OID symbolic	OID numeric	Type	Access	Description
INT bscCuConnectionStatus	1.3.6.1.4.1.495.2.1.6.56.11.1.31	INTEGER	read-only	Indicates the X25 connection status of this link.
CTR bscCuConnectRequest	1.3.6.1.4.1.495.2.1.6.56.11.1.45	Counter	read-only	Number of connection requests coming from the upper SNALC layer.
INT bscCuControl	1.3.6.1.4.1.495.2.1.6.56.11.1.20	INTEGER	write-only	Control associated with the specified service access point.
INT bscCuDelayTimer	1.3.6.1.4.1.495.2.1.6.56.11.1.7	INTEGER	read-write	Identifies the number of seconds the emulated station may delay the sending of a block. Timer is in tenth of seconds.
CTR bscCuDisconnectIndication	1.3.6.1.4.1.495.2.1.6.56.11.1.47	Counter	read-only	Number of disconnections sent to the upper SNALC layer.
CTR bscCuDisconnectRequest	1.3.6.1.4.1.495.2.1.6.56.11.1.46	Counter	read-only	Number of disconnection requests coming from the upper SNALC layer.
CTR bscCuEndToEndConnectCnf	1.3.6.1.4.1.495.2.1.6.56.11.1.48	Counter	read-only	Number of end-to-end connections seen by the controller. Message sent by the Snalc.
bscCuEntry	1.3.6.1.4.1.495.2.1.6.56.11.1		not-accessible	The parameters for a particular controller unit.
BSC bscCuETBAck	1.3.6.1.4.1.495.2.1.6.56.11.1.9	BscAckMode	read-write	Identifies if the acknowledgement is local or end to end for ETBs. The ETB is a trailer block delimitator.. The 'endToEnd' means each block is acknowledged to the sender after receiving a confirmation from the remote BSC. The 'local' means the block is acknowledged locally. The block initiator is notified the block was received by the peer BSC layer.
BSC bscCuETXAck	1.3.6.1.4.1.495.2.1.6.56.11.1.10	BscAckMode	read-write	Identifies if the acknowledgement is local or end to end for ETXs. The ETX is a trailer command delimitator.. The 'endToEnd' means the command is acknowledged to the sender after receiving a confirmation from the remote BSC. The 'local' means the command is acknowledged locally. The command initiator is notified the command was completed by the BSC layer. It doesn't garranty the command was completed by the remote BSC.
INT bscCuHwdType	1.3.6.1.4.1.495.2.1.6.56.11.1.4	INTEGER	read-write	Identifies the controller unit type.
BSC bscCuMaxBlockLength	1.3.6.1.4.1.495.2.1.6.56.11.1.5	BscBlockSize	read-write	Identifies the maximal length of the blocks exchanged between the host/terminal and the BSC module. The value is measured in octets and is specified by the BSC protocol. The DEFVAL value will be 'block3000' or 'block256', depending if the sap is configurated as 'hostInterfaceUnit' or 'terminalInterfaceUnit' (see the object 'bscSapInterfaceType').
BSC bscCuNumber	1.3.6.1.4.1.495.2.1.6.56.11.1.2	BscCuIndex	read-only	Identifies the address of this controller unit. The address has to be unique for a specified sap.
BSC bscCuOperationalMode	1.3.6.1.4.1.495.2.1.6.56.11.1.30	BscOperationalMode	read-only	Identifies the service access point as being active or non-active with the new configuration.
INT bscCuPollTimeout	1.3.6.1.4.1.495.2.1.6.56.11.1.6	INTEGER	read-write	Identifies the number of seconds a station waits for an answer. The value is measured in tenth of seconds.
INT bscCuRetryCounter	1.3.6.1.4.1.495.2.1.6.56.11.1.8	INTEGER	read-write	Identifies the number of retries are executed, before a command fails. It is used by the host/terminal and the BSC layer.
BSC bscCuRowStatus	1.3.6.1.4.1.495.2.1.6.56.11.1.3	BscRowStatus	read-write	Indicates whether the particular service access point is configured within the MIB. Controller unit entries (rows) may be created by setting this object value to 'valid', or deleted by changing this object value to 'invalid'. Whether or not the row actually disappears is left to the implementation so this object may actually read as 'invalid' for some arbitrary length of time.
SAP bscCuSapNumber	1.3.6.1.4.1.495.2.1.6.56.11.1.1	SapIndex	read-only	Identifies the sap associated with this controller unit. Each controller unit has an address and the address has to be unique with one sap. However, the address is not required to be unique between saps. This object is an index in the sap Table. Values are unique.
CTR bscCuSnalcRxRnr	1.3.6.1.4.1.495.2.1.6.56.11.1.49	Counter	read-only	Number of RNR 's received from the SNALC module due to X.25 or LLC2 flow control.
CTR bscCuSnalcRxRr	1.3.6.1.4.1.495.2.1.6.56.11.1.50	Counter	read-only	Number of RR 's received from the SNALC module due to X.25 or LLC2 flow control.
bscCuTable	1.3.6.1.4.1.495.2.1.6.56.11		not-accessible	A table containing configuration information about all the 3270 controller units.
CTR bscDevBlocksQueued	1.3.6.1.4.1.495.2.1.6.56.12.1.79	Counter	read-only	Number of blocks queued.
CTR bscDevCircuitDisconnect	1.3.6.1.4.1.495.2.1.6.56.12.1.74	Counter	read-only	Number of device disconnection requests (or disable) coming from the DSP module through the upper SNALC layer.
CTR bscDevCircuitEnable	1.3.6.1.4.1.495.2.1.6.56.12.1.73	Counter	read-only	Number of device connection requests (or enable) coming from the DSP module through the upper SNALC layer.
CTR bscDevCircuitRequest	1.3.6.1.4.1.495.2.1.6.56.12.1.75	Counter	read-only	Number of circuit requests sent (TIU) or received (HIU) to/from the DSP module through the upper SNALC layer.
CTR bscDevCommandsQueued	1.3.6.1.4.1.495.2.1.6.56.12.1.78	Counter	read-only	Number of commands queued.
INT bscDevConnectionStatus	1.3.6.1.4.1.495.2.1.6.56.12.1.31	INTEGER	read-only	Indicates the current status of the device's logical connection with regard to the network.
INT bscDevControl	1.3.6.1.4.1.495.2.1.6.56.12.1.20	INTEGER	write-only	Control associated with the specified service access point.
BSC bscDevCuNumber	1.3.6.1.4.1.495.2.1.6.56.12.1.2	BscCuIndex	read-only	Identifies the address of the controller unit to which this device is attached.
CTR bscDevCuShortRead	1.3.6.1.4.1.495.2.1.6.56.12.1.67	Counter	read-only	Number of controller initiated short read commands.
CTR bscDevDeviceSelection	1.3.6.1.4.1.495.2.1.6.56.12.1.62	Counter	read-only	Number of device selections transmitted/received.
bscDevEntry	1.3.6.1.4.1.495.2.1.6.56.12.1		not-accessible	The parameters for a particular controller unit.
CTR bscDevError	1.3.6.1.4.1.495.2.1.6.56.12.1.71	Counter	read-only	Identifies the number of blocks in errors (other than BCC) received by this controller unit.
CTR bscDevErrTimeout	1.3.6.1.4.1.495.2.1.6.56.12.1.72	Counter	read-only	Identifies the number of timeouts for this controller unit.
CTR bscDevGeneralPoll	1.3.6.1.4.1.495.2.1.6.56.12.1.60	Counter	read-only	Number of general polls transmitted/received.
CTR bscDevHostControl	1.3.6.1.4.1.495.2.1.6.56.12.1.66	Counter	read-only	Number of host initiated control commands.
CTR bscDevHostRead	1.3.6.1.4.1.495.2.1.6.56.12.1.65	Counter	read-only	Number of host initiated read commands which need a direct response.
CTR bscDevHostWrite	1.3.6.1.4.1.495.2.1.6.56.12.1.64	Counter	read-only	Number of host initiated write commands.
BSC bscDevNumber	1.3.6.1.4.1.495.2.1.6.56.12.1.3	BscDevIndex	read-only	Identifies the address of this device. The address has to be unique for a specified for a controller unit.
BSC bscDevOperationalMode	1.3.6.1.4.1.495.2.1.6.56.12.1.30	BscOperationalMode	read-only	Identifies the device as being active or non-active with the new configuration.
BSC bscDevRowStatus	1.3.6.1.4.1.495.2.1.6.56.12.1.4	BscRowStatus	read-write	Indicates whether the particular service access point is configured within the MIB. Controller unit entries (rows) may be created by setting this object value to 'valid', or deleted by changing this object value to 'invalid'. Whether or not the row actually disappears is left to the implementation so this object may actually read as 'invalid' for some arbitrary length of time.
CTR bscDevRxBlocks	1.3.6.1.4.1.495.2.1.6.56.12.1.69	Counter	read-only	Identifies the number of blocks received by this controller unit.
CTR bscDevRxCommands	1.3.6.1.4.1.495.2.1.6.56.12.1.77	Counter	read-only	Number of complete commands received from the host or controller/device.
CTR bscDevRxRvi	1.3.6.1.4.1.495.2.1.6.56.12.1.81	Counter	read-only	Number of received RVI's from the controller/device.
CTR bscDevRxTtd	1.3.6.1.4.1.495.2.1.6.56.12.1.83	Counter	read-only	Number of received text delay's, TTD, from the host.(HIU)
CTR bscDevRxWack	1.3.6.1.4.1.495.2.1.6.56.12.1.85	Counter	read-only	Number of recieved WACK's from the controller/device.
SAP bscDevSapNumber	1.3.6.1.4.1.495.2.1.6.56.12.1.1	SapIndex	read-only	Identifies the sap to which this device is attached.
CTR bscDevSpecificPoll	1.3.6.1.4.1.495.2.1.6.56.12.1.61	Counter	read-only	Number of specific polls transmitted/received.
BSC bscDevSSCommandReject	1.3.6.1.4.1.495.2.1.6.56.12.1.37	BscStatusSense	read-only	The current bit information found in the last status sense message received/transmitted.
BSC bscDevSSControlCheck	1.3.6.1.4.1.495.2.1.6.56.12.1.41	BscStatusSense	read-only	The current bit information found in the last status sense message received/transmitted.
BSC bscDevSSDataCheck	1.3.6.1.4.1.495.2.1.6.56.12.1.40	BscStatusSense	read-only	The current bit information found in the last status sense message received/transmitted.
BSC bscDevSSDeviceBusy	1.3.6.1.4.1.495.2.1.6.56.12.1.33	BscStatusSense	read-only	The current bit information found in the last status sense message received/transmitted.
BSC bscDevSSDeviceEnd	1.3.6.1.4.1.495.2.1.6.56.12.1.35	BscStatusSense	read-only	The current bit information found in the last status sense message received/transmitted.
BSC bscDevSSEquipmentCheck	1.3.6.1.4.1.495.2.1.6.56.12.1.39	BscStatusSense	read-only	The current bit information found in the last status sense message received/transmitted.
BSC bscDevSSInterventionRequired	1.3.6.1.4.1.495.2.1.6.56.12.1.38	BscStatusSense	read-only	The current bit information found in the last status sense message received/transmitted.
BSC bscDevSSOperationCheck	1.3.6.1.4.1.495.2.1.6.56.12.1.42	BscStatusSense	read-only	The current bit information found in the last status sense message received/transmitted.
BSC bscDevSSTransmissionCheck	1.3.6.1.4.1.495.2.1.6.56.12.1.36	BscStatusSense	read-only	The current bit information found in the last status sense message received/transmitted.
BSC bscDevSSUnitSpecify	1.3.6.1.4.1.495.2.1.6.56.12.1.34	BscStatusSense	read-only	The current bit information found in the last status sense message received/transmitted.
INT bscDevState	1.3.6.1.4.1.495.2.1.6.56.12.1.32	INTEGER	read-only	Indicates the state of this link.
CTR bscDevStatusSense	1.3.6.1.4.1.495.2.1.6.56.12.1.70	Counter	read-only	Identifies the number of status/sense messages received by the device.
bscDevTable	1.3.6.1.4.1.495.2.1.6.56.12		not-accessible	A table containing configuration information about all the devices controlled by this module.
CTR bscDevTestRequest	1.3.6.1.4.1.495.2.1.6.56.12.1.63	Counter	read-only	Number of test request messages received.
CTR bscDevTxBlocks	1.3.6.1.4.1.495.2.1.6.56.12.1.68	Counter	read-only	Identifies the number of blocks transmited by this controller unit.
CTR bscDevTxCommands	1.3.6.1.4.1.495.2.1.6.56.12.1.76	Counter	read-only	Number of complete commands transmitted to the host or controller/device.
CTR bscDevTxRvi	1.3.6.1.4.1.495.2.1.6.56.12.1.80	Counter	read-only	Number of transmitted RVI's to the host. (HIU).
CTR bscDevTxTtd	1.3.6.1.4.1.495.2.1.6.56.12.1.82	Counter	read-only	Number of transmitted text delays, TTD, to the controller/device.(TIU)
CTR bscDevTxWack	1.3.6.1.4.1.495.2.1.6.56.12.1.84	Counter	read-only	Number of transmitted WACK's to the host.(HIU).
INT bscDevType	1.3.6.1.4.1.495.2.1.6.56.12.1.5	INTEGER	read-write	Indicates whether the device is a printer or a display.
TIK bscPollIntAfterAckTimer	1.3.6.1.4.1.495.2.1.6.56.10.1.8	TimeTicks	read-write	This object applies only to a service access point functioning as a TIU. Determines the length of time allowed to elapse between the reception of an acknowledgment to a poll and the transmission of the next poll. Certain control units require a delay in order to successfully respond to polls. Since multiple BSC logical links may share the same SAP (i.e., multiple control units communicating on the same physical link), this timer applies globally to all logical links using this SAP. Range of values: 1 - 250 (in tenths of a second), a value of 0 disables the timer.
ALI bscSapAlias	1.3.6.1.4.1.495.2.1.6.56.10.1.5	Alias	read-write	Identifies the service access point by a textual name. Names are unique per service access point.
CTR bscSapBlockReject	1.3.6.1.4.1.495.2.1.6.56.10.1.44	Counter	read-only	Identifies the number of blocks received whose frame size is greater than that configured.
ALI bscSapCompanionAlias	1.3.6.1.4.1.495.2.1.6.56.10.1.6	Alias	read-write	Identifies the `lower' service access point that will communicate with this service access point by a textual name. Names are unique per service access point. Used to bind the BSC Sap with the COP driver sap.
INT bscSapControl	1.3.6.1.4.1.495.2.1.6.56.10.1.20	INTEGER	write-only	Control associated with the specified service access point.
CTR bscSapCrcError	1.3.6.1.4.1.495.2.1.6.56.10.1.43	Counter	read-only	Identifies the number of blocks with CRC errors.
bscSapEntry	1.3.6.1.4.1.495.2.1.6.56.10.1		not-accessible	The parameters for a particular service access point.
INT bscSapInterfaceType	1.3.6.1.4.1.495.2.1.6.56.10.1.4	INTEGER	read-write	Identifies the type of controller: either TIU or HIU.
CTR bscSapLinkChange	1.3.6.1.4.1.495.2.1.6.56.10.1.40	Counter	read-only	Indicates the number of times the physical link has been brought up.
INT bscSapLinkStatus	1.3.6.1.4.1.495.2.1.6.56.10.1.31	INTEGER	read-only	Indicates the physical status of the sap with respect to its associated cop.
SAP bscSapNumber	1.3.6.1.4.1.495.2.1.6.56.10.1.1	SapIndex	read-only	Identifies the service access point by a numerical value. This value is used as a index in the saps table. Values are unique per service access point.
BSC bscSapOperationalMode	1.3.6.1.4.1.495.2.1.6.56.10.1.30	BscOperationalMode	read-only	Identifies the service access point as being active or non-active with the new configuration.
CTR bscSapOverrun	1.3.6.1.4.1.495.2.1.6.56.10.1.41	Counter	read-only	Identifies the number of block overrun's received by this sap.
CTR bscSapParityError	1.3.6.1.4.1.495.2.1.6.56.10.1.42	Counter	read-only	Identifies the number of blocks received with parity errors.
BSC bscSapRowStatus	1.3.6.1.4.1.495.2.1.6.56.10.1.2	BscRowStatus	read-write	Indicates whether the particular service access point is configured within the MIB. Service access point entries (rows) may be created by setting this object value to 'valid', or deleted by changing this object value to 'invalid'. Whether or not the row actually disappears is left to the implementation so this object may actually read as 'invalid' for some arbitrary length of time.
INT bscSapSnalcRef	1.3.6.1.4.1.495.2.1.6.56.10.1.7	INTEGER	read-write	Identifies which upper sap is associated to the lower sap within the BSC module. Applies only to lower BSC saps.
bscSapTable	1.3.6.1.4.1.495.2.1.6.56.10		not-accessible	A table containing configuration information about all the service access point.
INT bscSapType	1.3.6.1.4.1.495.2.1.6.56.10.1.3	INTEGER	read-write	Identifies the service access point by type:'lower' identifies a SAP leading to a physical BSC port. 'Upper' identifies a SAP acting as an internal inter-layer logical port.

RFC description

Manages BSC (Binary Synchronous Communications) protocol settings on Connexin equipment including SAP configuration and block sizes.

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Download CXBsc-MIB

What Is CXBsc-MIB?

Supported Devices

Monitoring Examples

What Can Be Monitored

This MIB depends on

Related MIBs

RFC description