ADSL2-LINE-MIB

MIB Reference — IPNetwork Monitor · Updated September 09, 2026

All MIBsADSL2-LINE-MIB

Organization: ADSLMIB Working Group

Last Updated: 2006-10-04

Category: DSL and Broadband, Network Interfaces

Description: Manages ADSL2 (G.992.3/G.992.4) and ADSL2+ (G.992.5) line interfaces, extending the original ADSL-LINE-MIB with enhanced line profile and performance objects.

IPNetwork Monitor uses several OIDs from this MIB in network discovery and polling the applicable devices. Start monitoring ADSL2-LINE-MIB with a free 30-day trial of IPNetwork Monitor.

What Is ADSL2-LINE-MIB?

ADSL2-LINE-MIB is a standards-based IETF MIB (RFC 4706) extending the original ADSL-LINE-MIB (RFC 2662) to manage ADSL2 (G.992.3/G.992.4) and ADSL2+ (G.992.5) DSL line interfaces. It defines line configuration profiles/templates, alarm configuration templates, command/control objects for retraining, and status objects covering transmission system type, power management state, and per-direction line state. It is directly used to monitor DSL hardware/line status: line initialization success or failure, power management state (full power, low-power, idle), and the last upstream/downstream state reached are key indicators of physical-layer modem health. It explicitly extends the earlier RFC 2662 ADSL-LINE-MIB and works alongside the standard IF-MIB. It is deployed on standards-compliant DSLAM and CPE ADSL2/2+ modems in telco broadband access networks. Engineers can download the ADSL2-LINE-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in ADSL2-LINE-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

  • ADSL2/ADSL2+ DSL modem/CPE
  • vendor-neutral, standards-based MIB applicable to any compliant DSLAM

Monitoring Examples

An admin polls adsl2LineTable/adsl2LineEntry objects such as adsl2LineStatusInitResult and adsl2LineStatusPwrMngState to confirm a line trained successfully and is in full-power operation. adsl2LineStatusLastStateDs and adsl2LineStatusLastStateUs reveal the last downstream/upstream state reached during initialization, useful for diagnosing a line stuck in a low-power or failed-retrain condition. adsl2LineCmndConfLdsfFailReason exposes why a loop-diagnostics or short initialization command failed.

What Can Be Monitored

  • line initialization result
  • power management state
  • last upstream/downstream line state
  • loop diagnostics failure reason
  • line configuration template/profile
Imported Objects

From ADSL2-LINE-TC-MIB

Adsl2ChAtmStatus
Adsl2ChPtmStatus
Adsl2ConfPmsForce
Adsl2Direction
Adsl2InitResult
Adsl2LConfProfPmMode
Adsl2LastTransmittedState
Adsl2LdsfResult
Adsl2LineLdsf
Adsl2LineStatus
Adsl2MaxBer
Adsl2OperationModes
Adsl2PowerMngState
Adsl2PsdMaskDs
Adsl2PsdMaskUs
Adsl2RaMode
Adsl2RfiDs
Adsl2ScMaskDs
Adsl2ScMaskUs
Adsl2SymbolProtection
Adsl2TransmissionModeType
Adsl2Tssi
Adsl2Unit

From HC-PerfHist-TC-MIB

HCPerfIntervalThreshold
HCPerfTimeElapsed

From IF-MIB

ifIndexOBJECT-TYPE

From SNMP-FRAMEWORK-MIB

SnmpAdminString

From SNMPv2-CONF

MODULE-COMPLIANCE
NOTIFICATION-GROUP
OBJECT-GROUP

From SNMPv2-SMI

Counter32
Integer32
MODULE-IDENTITY
NOTIFICATION-TYPE
OBJECT-TYPE
Unsigned32
transmission

From SNMPv2-TC

RowStatus
TruthValue

How to Use in IPNetwork Monitor

Example using adsl2PMLCurr15MFecs OID:

Select an ADSL2/ADSL2+ DSLAM or CPE modem 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 adsl2PMLCurr15MFecs into the Find box to locate it in the OID tree, selecting the specific row/instance you want to monitor since this is a table column, then select it and click OK. It reports the count of seconds during this interval where there was at least one FEC correction event for one or more bearer channels in this line. 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 sharply between polls relative to its normal baseline (in seconds), since an unexpected spike often reflects a real change in traffic or activity. Click Finish to create the monitor; you can adjust any parameter later.
OIDs

RFC description

ADSL2 line configuration, performance monitoring, and status management.

Start monitoring ADSL2/ADSL2+ DSLAMs and CPE modems 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 ADSL2-LINE-MIB