NNC-ATM-CONGESTIONSTATISTICS-MIB

MIB Reference — IPNetwork Monitor · Updated October 06, 2026

All MIBs › NNC-ATM-CONGESTIONSTATISTICS-MIB

Organization: Newbridge Networks Corporation

Last Updated: 1998-07-14

Category: ATM

Description: Monitors Newbridge Networks ATM congestion statistics including cell loss and queue overflow counters.

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 NNC-ATM-CONGESTIONSTATISTICS-MIB?

NNC-ATM-CONGESTIONSTATISTICS-MIB is a Newbridge Networks vendor-specific MIB that monitors congestion behavior at ATM switching points on Newbridge's 36170 ATM switch platform, tracking cell-level congestion across raw, short-interval, and long-interval statistics tables. Its nncAtmCongPointInfoTable identifies each congestion point and its nncAtmCongPointHardwareType (card/queue/QOS/fabric configuration), while nncAtmCongStatsRawTable exposes cumulative counters — nncAtmCongStatsTotalCellsArrived, nncAtmCongStatsTotalCellsDiscarded, nncAtmCongStatsClp0CellsDiscarded — plus per-severity accumulated time in nncAtmCongStatsLowCongestedSeconds/MediumCongestedSeconds/SevereCongestedSeconds and a live nncAtmCongStatsCurrentCongestionState and nncAtmCongStatsAlarmStatus. Parallel current/historical short- and long-interval tables (nncAtmCongStatsCurrentShortIntvlTable, nncAtmCongStatsShortIntvlTable, and their long-interval counterparts) let operators trend congestion over time rather than just view cumulative totals. It depends on ENTITY-MIB for PhysicalIndex correlation and NNC-INTERVAL-STATISTICS-TC-MIB for interval-state typing, and is deployed on Newbridge 36170 ATM switches in service-provider ATM backbones, where engineers consult the NNC-ATM-CONGESTIONSTATISTICS-MIB OID tree when investigating cell loss.

IPNetwork Monitor allows you to monitor SNMP objects defined in NNC-ATM-CONGESTIONSTATISTICS-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

  • Newbridge Networks 36170 ATM switch (SHub Diablo/NSX/Eagle hardware)

Monitoring Examples

An operator polls nncAtmCongStatsCurrentCongestionState and nncAtmCongStatsAlarmStatus for a congestion point to see if it is currently congested, then checks nncAtmCongStatsClp0CellsDiscarded against nncAtmCongStatsTotalCellsArrived to quantify cell loss under load; rising nncAtmCongStatsSevereCongestedSeconds across successive short-interval samples would indicate a persistent, worsening congestion condition at that switching point.

What Can Be Monitored

  • congestion point hardware type/QoS mapping
  • cumulative cells arrived/discarded counters
  • CLP0 cell discard counter
  • low/medium/severe congested-seconds accumulators
  • current congestion state and alarm status
  • short- and long-interval congestion trend tables

This MIB depends on

Related MIBs

Imported Objects

From ENTITY-MIB

PhysicalIndex

From NNC-INTERVAL-STATISTICS-TC-MIB

NncExtIntvlStateType

From NNCGNI0001-SMI

NncExtCounter64
nncExtensionsOBJECT-IDENTITY

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

Counter32
MODULE-IDENTITY
OBJECT-TYPE

From SNMPv2-TC

TEXTUAL-CONVENTION

How to Use in IPNetwork Monitor

Example using nncAtmCongStatsLowCongestedSeconds OID:

Select a Newbridge Networks 36170 ATM switch (SHub Diablo/NSX/Eagle hardware) 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 nncAtmCongStatsLowCongestedSeconds 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 seconds the congestion point was in the Low Congestion State. 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

Monitors ATM congestion statistics and performance metrics at various interval levels on Newbridge ATM equipment.

Start monitoring Newbridge Networks 36170 ATM switch (SHub Diablo/NSX/Eagle hardware) 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 NNC-ATM-CONGESTIONSTATISTICS-MIB