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.
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 |
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.
What Can Be Monitored
- LAPB link configuration (window size, timers)
- frame retransmission counts
- link error counts
- retry count settings
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.
OIDs
| OID symbolic | OID numeric | Type | Access | Description |
|---|---|---|---|---|
| accLapb | 1.3.6.1.4.1.5.1.1.7 | |||
| INT accLapbNum | 1.3.6.1.4.1.5.1.1.7.1 | INTEGER | read-only | Number of HDLC ports |
| accLapbParmTable | 1.3.6.1.4.1.5.1.1.7.2 | not-accessible | HDLC LAPB port parameters | |
| accLapbParmEntry | 1.3.6.1.4.1.5.1.1.7.2.1 | not-accessible | LAPB parameters for a port. | |
| 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 accLapbType | 1.3.6.1.4.1.5.1.1.7.2.1.2 | INTEGER | read-write | LAPB station type for this interface. |
| 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 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 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 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 accHdlcRrPolling | 1.3.6.1.4.1.5.1.1.7.2.1.7 | INTEGER | read-write | T3 Timer. |
| INT accHdlcFCS | 1.3.6.1.4.1.5.1.1.7.2.1.8 | INTEGER | read-write | FCS Mode. |
| 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 accHdlcIdleFill | 1.3.6.1.4.1.5.1.1.7.2.1.11 | INTEGER | read-write | Fill between frames with flags or ones |
| 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. | |
| accLapbStatEntry | 1.3.6.1.4.1.5.1.1.7.3.1 | not-accessible | LAPB statistics for a specific port. | |
| 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 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). |
| 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 |
| 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 |
| 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 |
RFC description
Vendor-private MIB for the ACC (Advanced Computer Communications) LAPB (Link Access Procedure Balanced) protocol implementation on WAN interfaces.
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