DS3-MIB

MIB Reference — IPNetwork Monitor · Updated September 09, 2026

All MIBsDS3-MIB

Organization: IETF AToM MIB Working Group

Last Updated: 2004-09-08

Category: Network Interfaces

Description: Defines managed objects for DS3 and E3 interfaces, providing configuration, status, and performance monitoring for T3/E3 digital circuits.

IPNetwork Monitor uses several OIDs from this MIB in network discovery and polling the applicable devices. Start monitoring DS3-MIB with a free 30-day trial of IPNetwork Monitor.

What Is DS3-MIB?

This is a vendor-neutral, IETF standards-based MIB (RFC 3896) that defines managed objects for DS3 and E3 digital circuit interfaces, higher-bandwidth T3/E3-family transmission technologies used in carrier backbone and enterprise WAN links. It exposes per-line configuration (line type, line coding, framing/send code, loopback settings), performance-monitoring interval tracking, and current line status/fault data along with a dedicated notifications (traps) group. It is strongly oriented toward monitoring hardware status: dsx3LineStatus reports the live condition of the circuit (e.g., alarm conditions, loopback state), and ds3Traps generates fault notifications for line-state changes, letting operators detect a failed or degraded T3/E3 circuit quickly. It is a foundational IETF standards MIB paralleling DS1-MIB, and many vendor router/multiplexer implementations build their T3/E3 support around it; network engineers commonly consult a DS3-MIB reference when mapping dsx3LineStatus alarm bit values to actual circuit fault conditions. It is typically deployed on routers, digital cross-connects, and carrier access equipment terminating DS3/E3 circuits in WAN and backbone networks.

IPNetwork Monitor allows you to monitor SNMP objects defined in DS3-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

  • vendor-neutral, standards-based IETF MIB, applies to routers/carrier access equipment with T3/E3 interfaces

Monitoring Examples

An administrator could poll dsx3ConfigTable/dsx3ConfigEntry indexed by dsx3LineIndex and dsx3IfIndex to check configured dsx3LineType and dsx3LineCoding, then monitor dsx3LineStatus for alarm or loopback bit flags that would explain a sudden loss of throughput on that circuit. The ds3Traps notification group can alert operations staff immediately when dsx3LineStatus changes state, avoiding the need for constant polling of dsx3TimeElapsed and dsx3ValidIntervals.

What Can Be Monitored

  • line type and coding configuration
  • current line status/alarm condition
  • loopback configuration state
  • circuit identifier
  • performance interval elapsed time and validity
  • line status change notifications
Imported Objects

From IF-MIB

InterfaceIndex

From PerfHist-TC-MIB

PerfCurrentCount
PerfIntervalCount
PerfTotalCount

From SNMPv2-CONF

MODULE-COMPLIANCE
NOTIFICATION-GROUP
OBJECT-GROUP

From SNMPv2-SMI

MODULE-IDENTITY
NOTIFICATION-TYPE
OBJECT-TYPE
transmission

From SNMPv2-TC

DisplayString
TimeStamp
TruthValue
OIDs

RFC description

RFC 3896 MIB for managing DS3/T3 (45 Mbps) digital circuits and performance statistics.

Start monitoring Router/carrier access equipment with T3/E3 interfaces (vendor-neutral IETF standard RFC 3896) 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 DS3-MIB