USR-IPOA-ARP-MIB

MIB Reference — IPNetwork Monitor · Updated October 06, 2026

All MIBs › USR-IPOA-ARP-MIB

Organization: CommWorks Corporation, a 3Com Company

Last Updated: 2002-04-06

Category: CommWorks/3Com Access Equipment

Description: Manages IP over ATM ARP server tables and client registrations on CommWorks/3Com equipment.

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What Is USR-IPOA-ARP-MIB?

USR-IPOA-ARP-MIB is a CommWorks (US Robotics/3Com) enterprise MIB for managing IP-over-ATM ARP server functionality, including high-availability (HA) redundancy between paired ARP server controllers. It exposes configuration data for virtual and physical HA controller pairs, ARP registration statistics, and switchover counters between redundant ARP servers. Its monitoring focus spans both configuration and software/redundancy health: tracking registration request volume, how many redundant HA controllers are currently active, and how many HA switchovers have occurred, which reveals ARP server instability or an unplanned failover in the IP-over-ATM registration path. It builds on the base IP over ATM ARP model (RFC 1577-style Classical IP over ATM ARP) while adding CommWorks-specific HA redundancy extensions. It is deployed on CommWorks/3Com carrier-class ATM access platforms that provide redundant ARP server functionality for IP-over-ATM clients. Engineers can download the USR-IPOA-ARP-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in USR-IPOA-ARP-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

  • CommWorks/3Com ATM access platforms with redundant IP-over-ATM ARP server controllers

Monitoring Examples

An administrator would poll usrVirtualHAConfigTable and usrPhysicalHATable to see the virtual/physical HA controller pairing, and usrHACNHAStatsTable alongside usrTotalNumberOfHASwitchOvers to see how many failovers have occurred between redundant ARP controllers. A rising usrTotalNumberOfHASwitchOvers count combined with usrCurrNumOfActiveHA dropping below usrCurrNumRedundantHA would indicate one HA controller has gone down, degrading redundancy. usrTotalNumRegReq shows overall client registration volume, useful for spotting an unusual spike or drop in ARP registration traffic.

What Can Be Monitored

  • HA controller pairing/config
  • active vs. redundant HA controller counts
  • HA switchover count
  • ARP registration request volume
  • HA controller reachability/secret configuration
Imported Objects

From ATM-MIB-ATMNET

IfIndex

From ATM-TC-MIB

AtmAddr
AtmConnKind
AtmVcIdentifier
AtmVpIdentifier

From RFC1213-MIB

DisplayString
ipAdEntAddr
ipNetToMediaIfIndex
ipNetToMediaNetAddress

From SNMPv2-SMI

Counter32
Gauge32
Integer32
IpAddress
MODULE-IDENTITY
NOTIFICATION-TYPE
OBJECT-IDENTITY
OBJECT-TYPE
Unsigned32

From SNMPv2-TC

DisplayString
RowStatus
TEXTUAL-CONVENTION
TruthValue

From USR-DEFINITIONS-MIB

InterfaceIndex
InterfaceIndexOrZero
UsrConfigStatus
UsrDisplayString
UsrSecretDisplay
UsrSpecialU32
commonOBJECT-IDENTITY
usrAtm1577PvcOBJECT-IDENTITY
usrAtmArpOBJECT-IDENTITY
usrAtmCfgOBJECT-IDENTITY
usrDsx3OBJECT-IDENTITY
OIDs

RFC description

Vendor-private MIB for US Robotics IP over ATM (IPoA) Address Resolution Protocol management; monitors ARP operations over ATM networks.

Start monitoring CommWorks/3Com ATM access platforms with redundant IP-over-ATM ARP server controllers (HA switchover/registration 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 USR-IPOA-ARP-MIB