ACC-LAPB

All MIBs › ACC-LAPB

Category: Network Interfaces, SNA and Legacy Protocols, Vendor: ACC/Ericsson

Description: Manages LAPB (Link Access Procedure Balanced) X.25 data link layer configuration on ACC/Ericsson routers, covering frame parameters and error recovery.

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What Is ACC-LAPB?

ACC-LAPB is an enterprise MIB for ACC/Ericsson routers covering LAPB (Link Access Procedure Balanced), the X.25 data-link-layer protocol, including frame parameters and error-recovery configuration. It exposes objects for LAPB link configuration, such as window size, timers, and retry counts, plus link-level statistics such as frame retransmissions and error counts. Its monitoring value is in link-layer software/protocol health: rising retransmission or error counts on a LAPB link reveal a degrading X.25 circuit or misconfigured timer/window parameters before the higher-layer X.25 session fails outright. It is a link-layer companion to other ACC WAN MIBs and would typically be used alongside a standard interface MIB (e.g. IF-MIB) for full interface-status visibility. It is deployed on ACC/Ericsson routers connecting to legacy X.25 packet-switched networks. Engineers can download the ACC-LAPB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in ACC-LAPB. 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

ACC/Ericsson router with X.25/LAPB WAN interfaces

Monitoring Examples

An administrator polls the LAPB link statistics to check frame retransmission and error counts on an X.25 circuit, comparing them against the configured retry-count and timer thresholds. A sustained increase in retransmissions relative to total frames sent would point to a noisy or failing physical circuit underneath the LAPB link, prompting a check of the underlying serial/physical layer.

What Can Be Monitored

LAPB link configuration (window size, timers)
frame retransmission counts
link error counts
retry count settings

Imported Objects

From ACC-MIB

DisplayString
IfIndex
RowStatus
SmdsAddress
accBRG	OBJECT-IDENTITY

From ACC-SYSTEM

accTrapLogSeqNum

OBJECT-TYPE

From RFC1155-SMI

Counter
Gauge
IpAddress
OBJECT-TYPE
TimeTicks

OIDs

OID symbolic	OID numeric	Type	Access	Description
INT accHdlcCoding	1.3.6.1.4.1.5.1.1.7.2.1.9	INTEGER	read-write	HDLC Coding type.
INT accHdlcDuplex	1.3.6.1.4.1.5.1.1.7.2.1.10	INTEGER	read-write	HDLC Duplex mode.
INT accHdlcFCS	1.3.6.1.4.1.5.1.1.7.2.1.8	INTEGER	read-write	FCS Mode.
INT accHdlcIdleFill	1.3.6.1.4.1.5.1.1.7.2.1.11	INTEGER	read-write	Fill between frames with flags or ones
INT accHdlcRrPolling	1.3.6.1.4.1.5.1.1.7.2.1.7	INTEGER	read-write	T3 Timer.
accLapb	1.3.6.1.4.1.5.1.1.7
INT accLapbFlags	1.3.6.1.4.1.5.1.1.7.2.1.6	INTEGER	read-write	Number of flags to insert between frames on transmission.
INT accLapbFrameWindow	1.3.6.1.4.1.5.1.1.7.2.1.5	INTEGER	read-write	LAPB frame window. If a value greater than 7 is specified, modulo-128 sequencing is used instead of modulo-8 sequencing.
INT accLapbIndex	1.3.6.1.4.1.5.1.1.7.2.1.1	INTEGER	read-only	Physical port number of this interface.
INT accLapbN2Count	1.3.6.1.4.1.5.1.1.7.2.1.4	INTEGER	read-write	N2 counter (retry counter) for this interface.
INT accLapbNum	1.3.6.1.4.1.5.1.1.7.1	INTEGER	read-only	Number of HDLC ports
accLapbParmEntry	1.3.6.1.4.1.5.1.1.7.2.1		not-accessible	LAPB parameters for a port.
accLapbParmTable	1.3.6.1.4.1.5.1.1.7.2		not-accessible	HDLC LAPB port parameters
CTR accLapbStatBadFCSIns	1.3.6.1.4.1.5.1.1.7.3.1.2	Counter	read-only	Number of LAPB frames received with bad frame checksum (FCS).
accLapbStatEntry	1.3.6.1.4.1.5.1.1.7.3.1		not-accessible	LAPB statistics for a specific port.
CTR accLapbStatFRMRIns	1.3.6.1.4.1.5.1.1.7.3.1.3	Counter	read-only	Number of LAPB frames received with framing errors
INT accLapbStatIndex	1.3.6.1.4.1.5.1.1.7.3.1.1	INTEGER	read-only	Port number for this LAPB serial port
CTR accLapbStatREJIns	1.3.6.1.4.1.5.1.1.7.3.1.5	Counter	read-only	number of REJECT LAPB frames received
CTR accLapbStatREJOuts	1.3.6.1.4.1.5.1.1.7.3.1.6	Counter	read-only	Number of LAPB REJECT frames transmitted
CTR accLapbStatShortIns	1.3.6.1.4.1.5.1.1.7.3.1.7	Counter	read-only	Number of short LAPB frames received
CTR accLapbStatT1Timeouts	1.3.6.1.4.1.5.1.1.7.3.1.4	Counter	read-only	Number of T1 timeouts detected on this port
accLapbStatTable	1.3.6.1.4.1.5.1.1.7.3		not-accessible	A list of statistics for serial ports configured for LABP protocol.
INT accLapbT1Timer	1.3.6.1.4.1.5.1.1.7.2.1.3	INTEGER	read-write	T1 timer value (in milliseconds) for this interface.
INT accLapbType	1.3.6.1.4.1.5.1.1.7.2.1.2	INTEGER	read-write	LAPB station type for this interface.

RFC description

Vendor-private MIB for the ACC (Advanced Computer Communications) LAPB (Link Access Procedure Balanced) protocol implementation on WAN interfaces.

Start monitoring ACC/Ericsson WAN access routers (legacy) with a free 30-day trial of IPNetwork Monitor. Import MIBs, browse SNMP OIDs, create custom SNMP monitors, configure alerts, and monitor any SNMP-enabled network device from a single console.

Download ACC-LAPB

What Is ACC-LAPB?

Supported Devices

Monitoring Examples

What Can Be Monitored

This MIB depends on

Related MIBs

RFC description