AC-LAG-MIB

MIB Reference — IPNetwork Monitor · Updated September 09, 2026

All MIBsAC-LAG-MIB

Organization: Appian Communications, Inc.

Last Updated: 2000-02-23

Category: Vendor: AudioCodes

Description: Manages Link Aggregation Group (LAG) configuration on AudioCodes devices, enabling port bonding for increased uplink bandwidth and redundancy.

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What Is AC-LAG-MIB?

AC-LAG-MIB is a vendor MIB from AudioCodes (originally Appian Communications) that manages IEEE 802.3ad Link Aggregation Group configuration, allowing multiple physical ports to be bonded into a single logical uplink for increased bandwidth and redundancy on AudioCodes gateway/media platforms. It exposes an aggregation table describing each LAG's MAC address, actor/partner system IDs and priorities, admin/operational key values, and the ports composing the aggregate. This is used for monitoring both configuration and operational hardware status: an administrator can check whether an aggregate's actor and partner operational keys match (confirming successful LACP negotiation) and detect a port that has dropped out of an aggregate, which signals a link or hardware failure on that member port. It implements the IEEE 802.3ad standard, so it depends on that standard's LACP state machine semantics though it's exposed through a vendor-specific MIB rather than the standard IEEE8023-LAG-MIB. It is deployed on AudioCodes VoIP media gateways that use bonded uplinks for capacity or redundancy. Engineers can download the AC-LAG-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in AC-LAG-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

  • Appian Communications, Inc. chassis-based access-platform equipment (802.3ad Link Aggregation)

Monitoring Examples

An administrator would walk acDot3adAggTable (acDot3adAggEntry, indexed by acDot3adAggNodeIdIndex and acDot3adAggInstanceIndex) and compare acDot3adAggActorOperKey against acDot3adAggPartnerSystemID/operational key to confirm the aggregate is correctly negotiated with its LACP partner. Monitoring acDot3adAggPort membership over time reveals a member port dropping out of the aggregate, which would reduce available bandwidth and indicate a link or NIC fault.

What Can Be Monitored

  • LAG aggregate MAC address
  • actor/partner operational key match
  • aggregate member ports
  • actor system priority
  • aggregate up/individual state
Imported Objects

From APPIAN-SMI-MIB

AcAdminStatus
AcNodeId
AcOpStatus
AcPortNumber
AcSlotNumber
acPportOBJECT-IDENTITY

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

Counter32
MODULE-IDENTITY
OBJECT-TYPE
TimeTicks

From SNMPv2-TC

DisplayString
MacAddress
TEXTUAL-CONVENTION
TruthValue

How to Use in IPNetwork Monitor

Example using acDot3adAggPortStatsLACPDUsRx OID:

Select an Appian Communications access platform 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 acDot3adAggPortStatsLACPDUsRx 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. The number of valid LACPDUs received on this Aggregation Port. 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 a Counter32-type OID, Value bounds is the most useful condition here — trigger an alert if the counter increases sharply between polls relative to its normal baseline, since an unexpected spike often reflects a real change in traffic or activity. Click Finish to create the monitor; you can adjust any parameter later.
OIDs

RFC description

Link Aggregation (IEEE 802.3ad) management for Appian Communications devices including LACP state and churn detection.

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Download AC-LAG-MIB