CISCO-IETF-VDSL-LINE-MIB

MIB Reference — IPNetwork Monitor · Updated September 14, 2026

All MIBsCISCO-IETF-VDSL-LINE-MIB

Organization: Cisco Systems

Last Updated: 2002-04-18

Category: Cisco Devices, DSL and Broadband

Description: Provides the IETF VDSL line MIB implementation, covering VDSL interface configuration and statistics on Cisco devices.

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What Is CISCO-IETF-VDSL-LINE-MIB?

CISCO-IETF-VDSL-LINE-MIB is Cisco's implementation of the IETF standard MIB for managing VDSL (Very-high-bit-rate Digital Subscriber Line) modem pairs on Cisco routers and access devices equipped with VDSL line cards. It exposes configuration and status data for each VDSL line, represented as an entry in the standard ifTable, along with optional Fast and Interleaved channel statistics when those transport modes are enabled. The MIB is used to monitor the hardware/software health of the VDSL physical layer link, including line rate, signal attenuation/noise margin, and error or defect counters that reveal line quality degradation or loss of sync. It depends on the standard IF-MIB ifTable for interface indexing and follows the IETF VDSL-LINE-MIB definition. It is typically deployed by carriers and enterprises using Cisco DSL access routers or gateways to monitor last-mile broadband line performance, with the CISCO-IETF-VDSL-LINE-MIB MIB providing the standardized object definitions that carriers rely on for that visibility.

IPNetwork Monitor allows you to monitor SNMP objects defined in CISCO-IETF-VDSL-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

  • Cisco VDSL-capable routers/access concentrators
  • DSL line cards/modems
  • Cisco VDSL access routers/line cards

Monitoring Examples

Each VDSL line appears as a row in the standard ifTable, with additional Fast and Interleaved channel entries when those optional transport modes are configured on the line. An administrator would poll the per-line entries to track sync state, attenuation, and noise margin on a DSL link; a sudden increase in errors or a drop out of a trained/up state signals cable degradation or a modem retrain event. The source excerpt for this MIB did not include specific object names beyond the ifTable linkage described in its MODULE-IDENTITY text, so this example is grounded in that text rather than invented table names.

What Can Be Monitored

  • VDSL line sync status
  • Fast/Interleaved channel status
  • line attenuation and noise margin
  • line error/defect counts
Imported Objects

From CISCO-SMI

ciscoExperimentOBJECT-IDENTITY

From IF-MIB

ifIndexOBJECT-TYPE

From SNMP-FRAMEWORK-MIB

SnmpAdminString

From SNMPv2-CONF

MODULE-COMPLIANCE
NOTIFICATION-GROUP
OBJECT-GROUP

From SNMPv2-SMI

Gauge32
Integer32
MODULE-IDENTITY
NOTIFICATION-TYPE
OBJECT-TYPE

From SNMPv2-TC

RowStatus
TEXTUAL-CONVENTION
TruthValue
OIDs

RFC description

Implements the IETF VDSL line MIB for managing VDSL interface configuration and statistics on Cisco devices.

Start monitoring Cisco VDSL access routers/line cards 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 CISCO-IETF-VDSL-LINE-MIB