MPOA-MIB

MIB Reference — IPNetwork Monitor · Updated September 09, 2026

All MIBsMPOA-MIB

Organization: ATM Forum LANE/MPOA Working Group

Last Updated: 1998-11-09

Category: ATM

Description: Manages ATM Forum MPOA server and client configuration and cache state.

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What Is MPOA-MIB?

MPOA-MIB is a standards-based MIB, derived from the ATM Forum's MPOA specification (af-mpoa-0092.000), for managing Multiprotocol Over ATM clients (MPCs) and servers (MPSs) that enable direct ATM shortcut connections between LANs across a routed ATM network. It exposes configuration and cache-state data for MPOA clients/servers, most notably a MAC-address-to-ATM-address cache — originally via mpcMpsMacAddressTable, now obsoleted and replaced by mpcMpsMultipleMacAddressTable to support multiple MAC addresses per entry. Anyone consulting an MPOA-MIB reference today is most likely maintaining legacy ATM equipment rather than deploying new infrastructure, since MPOA itself is largely obsolete. Monitoring this MIB centers on the software/control-plane status of MPOA shortcut resolution — verifying that MAC/ATM address cache entries are correctly populated and current — rather than physical hardware sensors, helping diagnose failed shortcut setup or stale ATM cache entries. It depends on the underlying ATM MIB framework for the ATM interfaces and virtual circuits that MPOA shortcuts ride on. It is deployed in legacy ATM-based campus/backbone networks using MPOA for LAN-to-LAN traffic acceleration over ATM.

IPNetwork Monitor allows you to monitor SNMP objects defined in MPOA-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 MIB (ATM Forum MPOA spec), not tied to a specific manufacturer — applies to ATM-capable routers/switches acting as MPOA clients and servers

Monitoring Examples

An administrator would poll the mpcMpsMultipleMacAddressTable to review the cached MAC-address-to-ATM-address mappings maintained by an MPOA client/server; an entry that fails to populate or repeatedly ages out would indicate a broken MPOA shortcut resolution, forcing traffic back onto the slower default routed path instead of a direct ATM connection.

What Can Be Monitored

  • MAC-to-ATM address cache entries
  • MPOA client/server configuration
  • shortcut cache state
Imported Objects

From LAN-EMULATION-CLIENT-MIB

lecIndexOBJECT-TYPE

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

Counter32
Counter64
Integer32
MODULE-IDENTITY
OBJECT-TYPE
enterprises

From SNMPv2-TC

MacAddress
RowStatus
TEXTUAL-CONVENTION
TimeInterval
TimeStamp
TruthValue

How to Use in IPNetwork Monitor

Example using mpcActualSCSetupFrameCount OID:

Select an ATM-capable router or switch running MPOA 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 mpcActualSCSetupFrameCount 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 number of MPOA shortcut-setup frames counted over the configured measurement time. 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 an Integer32-type OID, Value bounds is the most useful condition here — trigger an alert if the count spikes well above its normal baseline, since an unusual surge in shortcut-setup activity often reflects a flow-detection or topology issue. Click Finish to create the monitor; you can adjust any parameter later.
OIDs

RFC description

ATM Forum MPOA (Multiprotocol Over ATM) MIB for managing MPOA clients and servers in ATM networks.

Start monitoring Vendor-neutral ATM Forum standard (ATM-capable router/switch, MPOA client/server) 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 MPOA-MIB