ATM-POLICY-CONSTRAINT-MIB

MIB Reference — IPNetwork Monitor · Updated September 09, 2026

All MIBsATM-POLICY-CONSTRAINT-MIB

Organization: The ATM Forum.

Last Updated: 2003-07-08

Category: ATM, Quality of Service

Description: Defines ATM traffic contract and policy constraint objects for connection admission control and QoS enforcement.

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What Is ATM-POLICY-CONSTRAINT-MIB?

ATM-POLICY-CONSTRAINT-MIB is an ATM Forum standards-based MIB defining policy constraint and policy routing objects for ATM connection admission control, organized around a policyConstraintTable that references entries in a companion policyTable defining operator-level rules. It exposes configuration data for traffic contracts and QoS policy enforcement rather than runtime performance counters, including maximum limits on constraints/policies and row-status-controlled provisioning entries. Its monitoring value is almost entirely on the software/configuration-plane side - verifying that policy constraints are correctly provisioned and within configured maximums (policyConstraintMaximum, policyMaximum) rather than reporting hardware or traffic-fault data directly. It is explicitly part of the ATM Forum's Policy Routing framework, depending on companion policyNeNscTable and policyRpNscTable structures. It is deployed in carrier-grade ATM network infrastructure implementing ATM Forum PNNI-style policy-based routing. Engineers implementing or auditing this functionality typically reference the ATM-POLICY-CONSTRAINT-MIB RFC/standard documentation for the authoritative specification.

IPNetwork Monitor allows you to monitor SNMP objects defined in ATM-POLICY-CONSTRAINT-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

  • ATM switch/router implementing ATM Forum PNNI policy routing
  • vendor-neutral, standards-based MIB, not tied to a specific manufacturer

Monitoring Examples

A network operator would check policyConstraintTable/policyConstraintEntry using policyConstraintIndex to confirm a given policyConstraintPolicyIndex correctly references the intended entry in policyTable, and verify policyConstraintRowStatus shows the entry as active. If policyNextPolicyConstraintIndex approaches policyConstraintMaximum, this indicates the device is nearing its configured limit for policy constraint entries, requiring cleanup or a capacity review before new constraints can be provisioned; this MIB is configuration-oriented and does not track live traffic itself.

What Can Be Monitored

  • policy constraint table entries
  • policy table entries and limits
  • constraint-to-policy index mapping
  • row status of policy constraint entries
  • remaining capacity vs configured maximums
Imported Objects

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

Integer32
MODULE-IDENTITY
OBJECT-TYPE
enterprises

From SNMPv2-TC

DisplayString
RowStatus
TEXTUAL-CONVENTION
OIDs

RFC description

MIB for managing ATM (Asynchronous Transfer Mode) policy constraints and traffic policies.

Start monitoring ATM switches/routers (ATM Forum PNNI policy routing) 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 ATM-POLICY-CONSTRAINT-MIB