CENTILLION-LECS-MPOA-MIB

MIB Reference — IPNetwork Monitor · Updated October 05, 2026

All MIBs › CENTILLION-LECS-MPOA-MIB

Category: ATM, Vendor: Nortel

Description: Manages ATM LANE Configuration Server (LECS) and Multi-Protocol Over ATM (MPOA) on Nortel Centillion switches.

Start monitoring vendor-neutral, standards-based MIB, any SNMPv3-capable network device (SNMP engine identity/boot/clock 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.

What Is CENTILLION-LECS-MPOA-MIB?

CENTILLION-LECS-MPOA-MIB is a vendor-specific MIB for Nortel (formerly Bay Networks) Centillion ATM switches, managing the LAN Emulation Configuration Server (LECS) and Multi-Protocol Over ATM (MPOA) client functionality used to bridge legacy LAN protocols over ATM backbones. It exposes configuration data for MPOA clients (MPCs), including their control ATM address, shortcut-setup frame counts/timers, retry timing, hold-down timers, and default TLV settings, managed via a row-status-controlled table. In monitoring terms it is used mainly to verify software/protocol-level configuration correctness of the MPOA shortcut mechanism -- confirming an MPC entry is active (cnLecsMpoaMpcRowStatus) and that its retry and hold-down timers are set appropriately -- issues here manifest as failed or unstable ATM shortcut paths rather than hardware faults. It depends on the underlying LANE/MPOA protocol framework standardized by the ATM Forum, layered on the Centillion switch's ATM hardware. It would typically be deployed on legacy Nortel Centillion ATM switches in networks bridging Ethernet/Token Ring traffic over an ATM core. Engineers can download the CENTILLION-LECS-MPOA-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in CENTILLION-LECS-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

  • Nortel Centillion ATM switch

Monitoring Examples

An administrator would poll cnLecsMpoaMpcTable/cnLecsMpoaMpcEntry to check cnLecsMpoaMpcRowStatus for each configured MPC and confirm cnLecsMpoaMpcCtrlAtmAddr matches the expected control address, verifying the MPOA client is correctly provisioned and active. Fields like cnLecsMpoaMpcRetryTimeMaximum and cnLecsMpoaMpcHoldDownTime would be reviewed when troubleshooting flapping or slow-to-establish ATM shortcuts. This MIB is primarily a configuration-verification tool for the LANE/MPOA control plane rather than a source of hardware telemetry.

What Can Be Monitored

  • MPOA client row status (active/inactive)
  • MPOA control ATM address
  • shortcut setup frame count/time
  • retry timing configuration
  • hold-down timer setting
Imported Objects

From CENTILLION-ROOT-MIB

atmLaneOBJECT-IDENTITY

From LAN-EMULATION-ELAN-MIB

lecsConfIndexOBJECT-TYPE

From MPOA-MIB

AtmConfigAddr
InternetworkAddrType
MpcIndex
MpsIndex

From RFC-1212

OBJECT-TYPE

From SNMPv2-SMI

Integer32

From SNMPv2-TC-v1

RowStatus
TruthValue
OIDs

RFC description

LAN Emulation Configuration Server (LECS) and MPOA client configuration for ATM networks.

Start monitoring Nortel/Bay Networks Centillion ATM/LAN switches (legacy) 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 CENTILLION-LECS-MPOA-MIB