Unisphere-Data-ETHERNET-MIB

MIB Reference — IPNetwork Monitor · Updated October 06, 2026

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Organization: Unisphere Networks, Inc.

Last Updated: 2002-04-05

Category: Juniper Unisphere ERX Routing

Description: Manages Unisphere ERX Ethernet interface configuration, media type, speed, and duplex settings.

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What Is Unisphere-Data-ETHERNET-MIB?

Unisphere-Data-ETHERNET-MIB is a Unisphere Networks (later Juniper ERX) proprietary MIB managing Ethernet interface and sub-interface configuration on ERX edge routing platforms, covering physical Ethernet interface parameters and logical sub-interface layering. It exposes objects for duplex mode (administrative and operational), speed, and MTU at the physical interface level, plus a sub-interface table for VLAN-style logical interface indexing and row-status lifecycle management. In monitoring terms it supports checking whether an Ethernet interface's operational duplex mode matches its administrative setting, a common source of performance-degrading duplex mismatches, along with verifying configured speed and MTU consistency — software/hardware-facing interface health checks rather than environmental sensors. It parallels concepts from the standard IF-MIB/EtherLike-MIB but is implemented as a self-contained enterprise MIB. It is typically deployed on Unisphere/Juniper ERX edge routers in service-provider broadband aggregation networks. Network engineers evaluating or troubleshooting this functionality can download the Unisphere-Data-ETHERNET-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in Unisphere-Data-ETHERNET-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

  • Unisphere Networks / Juniper ERX edge routers

Monitoring Examples

An administrator would poll usdEthernetIfTable/usdEthernetIfEntry, keyed by usdEthernetIfIndex, comparing usdEthernetIfDuplexMode against usdEthernetIfOperDuplexMode to detect a duplex mismatch that could explain unexplained packet loss or collisions on a link. usdEthernetIfSpeed and usdEthernetIfMtu would be checked to confirm the interface is running at its intended line rate and frame size. The usdEthernetSubIfTable/usdEthernetSubIfEntry, indexed by usdEthernetSubIfIndex, lets an operator verify that logical sub-interfaces remain in an active usdEthernetSubIfRowStatus, catching a sub-interface that was inadvertently left in a non-operational row state.

What Can Be Monitored

  • Ethernet interface administrative duplex mode
  • operational duplex mode
  • interface speed
  • interface MTU
  • sub-interface row status
  • next available sub-interface index
Imported Objects

From IF-MIB

InterfaceIndex
InterfaceIndexOrZero

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

Integer32
MODULE-IDENTITY
OBJECT-TYPE

From SNMPv2-TC

RowStatus
TruthValue

From Unisphere-Data-MIBs

usDataMibsMODULE-IDENTITY

From Unisphere-Data-TC

UsdNextIfIndex
OIDs

RFC description

Manages Ethernet interfaces including speed, duplex, VLAN configuration, and sub-interface creation.

Start monitoring Unisphere Networks / Juniper ERX edge routers (Ethernet duplex/speed/MTU config status) 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 Unisphere-Data-ETHERNET-MIB