ADSL-MIB

All MIBs › ADSL-MIB

Organization: CommWorks Corporation, a 3Com Company

Last Updated: 2002-05-05

Category: CommWorks / 3Com Broadband, DSL / Broadband Access

Description: Defines SNMP management objects for ADSL subscriber lines on CommWorks (3Com) broadband access equipment.

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What Is ADSL-MIB?

ADSL-MIB defines SNMP management objects for ADSL subscriber lines on CommWorks (3Com) broadband access equipment, such as DSLAMs or access concentrators. It exposes line configuration (rate, profile) and line-status/performance data for individual ADSL subscriber circuits. Monitoring use centers on tracking each ADSL line's sync status, rate, and error/performance counters, which is the primary way to determine whether a given subscriber's DSL connection is healthy or degraded, essentially a per-line software/link-status check rather than chassis hardware sensors. This is a vendor (CommWorks/3Com)-specific take on the ADSL-line management space also standardized generically by the IETF's ADSL-LINE-MIB, suggesting overlapping but non-identical coverage. It is deployed on 3Com/CommWorks broadband access aggregation equipment serving ADSL subscriber lines to residential or business customers. Network engineers evaluating or troubleshooting this functionality can download the ADSL-MIB file directly to load it into their MIB browser.

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

3Com/CommWorks ADSL access equipment

Monitoring Examples

No specific object names were provided for this module; based on its description, it would expose a per-line table with sync rate, line status, and error counters keyed by subscriber line/port index. An administrator troubleshooting a customer's slow DSL connection would poll that line's sync rate and error counters to determine whether the line is retraining or running at a downgraded rate due to line-quality issues.

What Can Be Monitored

ADSL line sync status
line sync rate
line error counters
line configuration profile

Imported Objects

From SNMPv2-SMI

Counter32
Integer32
MODULE-IDENTITY
OBJECT-TYPE

From USR-DEFINITIONS-MIB

UsrConfigStatus
UsrDisplayString
common	OBJECT-IDENTITY

How to Use in IPNetwork Monitor

Example using usrAdslOverflowCounter OID:

Select a 3Com/CommWorks ADSL access equipment as the target host to create a monitor — the SNMP service should be up and running on it. Click New Monitor, then check SNMP Custom on the Favorites tab, click Next, and confirm the host. On the next page, click Select... to open the built-in SNMP MIB Browser and type usrAdslOverflowCounter into the Find box to locate it in the OID tree, then select it and click OK. It reports the running counter for when usrAdslBytesErrorCorrected or usrAdslBytesNotErrorCorrected overflows. On the monitor's Main parameters page you can set the target's SNMP port (default 161), credentials, polling interval, and other settings — see the SNMP Monitor help for details. On the State conditions and Alerting tabs, configure when the monitor should change state and trigger an alert; since this is a Counter32-type OID, Value bounds is the most useful condition here — trigger an alert if the counter increases between polls, since a rising count of errors, failures, or discards often points to a real underlying problem. Click Finish to create the monitor; you can adjust any parameter later.

OIDs

OID symbolic	OID numeric	Type	Access	Description
usrAdsl	1.3.6.1.4.1.429.4.26			The commWorks enterprise defined MIB objects for ADSL
I32 usrAdslActualBaudDataRateDwn	1.3.6.1.4.1.429.4.26.17	Integer32	read-only	Actual downstream rate of kilobytes per second.
I32 usrAdslActualBaudDataRateDwnMar	1.3.6.1.4.1.429.4.26.18	Integer32	read-only	TBD
I32 usrAdslActualBaudDataRateUp	1.3.6.1.4.1.429.4.26.19	Integer32	read-only	Actual upstream rate of kilobytes per second.
I32 usrAdslActualBaudDataRateUpMarg	1.3.6.1.4.1.429.4.26.20	Integer32	read-only	TBD
I32 usrAdslActualDwnConstStatus	1.3.6.1.4.1.429.4.26.3	Integer32	read-only	Value corresponds to the actual downstream constellation that was used, which may differ from the value requested.
I32 usrAdslActualUpConstStatus	1.3.6.1.4.1.429.4.26.5	Integer32	read-only	Value corresponds to the actual upstream constellation that was used, which may differ from the value requested.
I32 usrAdslBytesErrCorrected	1.3.6.1.4.1.429.4.26.11	Integer32	read-only	Number of bytes corrected by Reed-Solomon error correction algorithm in the STARLET.
I32 usrAdslBytesNotErrCorrected	1.3.6.1.4.1.429.4.26.12	Integer32	read-only	Number of bytes not corrected by Reed-Solomon error correction algorithm in the STARLET.
STR usrAdslCfgFileName	1.3.6.1.4.1.429.4.26.22	UsrDisplayString	read-only	The name of a ConfigFile to read/write the D56k parameters. If the value of this object is an empty string, then the D56k Driver uses the default name `@file://D56k.cfg'.
USR usrAdslCFMStatusFlag	1.3.6.1.4.1.429.4.26.21	UsrConfigStatus	read-write	This variable controls saving and loading of configuration information for the D56k WAN Driver. The value can be set to either save or load by a management station. The other values indicate if any configuration operation and what type is in progress.
I32 usrAdslEqualization	1.3.6.1.4.1.429.4.26.9	Integer32	read-only	TBD
I32 usrAdslFwRel	1.3.6.1.4.1.429.4.26.6	Integer32	read-only	Firmware release number of the GTI supplied transceiver software module.
I32 usrAdslLastFailedStatus	1.3.6.1.4.1.429.4.26.16	Integer32	read-only	Defines the last detailed state reached in usrAdslStartupProgress before startup failed.
INT usrAdslMeanSqError	1.3.6.1.4.1.429.4.26.8	INTEGER	read-only	Received signal to noise ratio.
I32 usrAdslOpState	1.3.6.1.4.1.429.4.26.14	Integer32	read-only	Defines the high level operating state of the transceiver. Used by the customer to determine whether the transceiver is in idle mode, data mode, test mode, or startup.
C32 usrAdslOverflowCounterEx	1.3.6.1.4.1.429.4.26.13	Counter32	read-only	Running counter for when usrAdslBytesErrorCorrected or usrAdslBytesNotErrorCorrected overflows
I32 usrAdslReceiverGain	1.3.6.1.4.1.429.4.26.10	Integer32	read-write	Total receiver gain measured in dB.
I32 usrAdslResetStatus	1.3.6.1.4.1.429.4.26.23	Integer32	read-write	The Reset Status of the ADSL Starlet chipset
I32 usrAdslRmtReqDwnConstStatus	1.3.6.1.4.1.429.4.26.2	Integer32	read-write	Value corresponds to the downstream constellation requested.
I32 usrAdslRmtReqUpConstStatus	1.3.6.1.4.1.429.4.26.4	Integer32	read-only	Value corresponds to the upstream constellation requested.
I32 usrAdslStartletVerson	1.3.6.1.4.1.429.4.26.7	Integer32	read-only	Value is a number that corresponds to the version number of the STARLET VLSI in the transceiver.
I32 usrAdslStartupProgress	1.3.6.1.4.1.429.4.26.15	Integer32	read-only	Defines the current detailed startup state of the transceiver. The LSB determines the major mode corresponding to startup in var usrAdslOpState.
I32 usrAdslXmitPower	1.3.6.1.4.1.429.4.26.1	Integer32	read-only	Transmit power of ADSL transceiver represented in dB.

RFC description

ADSL transceiver monitoring including constellation, power, and firmware version management for DSL equipment.

Start monitoring 3Com/CommWorks ADSL access equipment 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 ADSL-MIB