CISCO-IETF-PW-TDM-MIB

MIB Reference — IPNetwork Monitor · Updated September 14, 2026

All MIBsCISCO-IETF-PW-TDM-MIB

Organization: Cisco Systems, Inc.

Last Updated: 2006-07-21

Category: Cisco Devices, Pseudowire

Description: Manages TDM (Time Division Multiplexing) pseudowire emulation for transporting circuit-mode traffic over packet networks.

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 CISCO-IETF-PW-TDM-MIB?

CISCO-IETF-PW-TDM-MIB is a Cisco enterprise MIB supplementing the CISCO-IETF-PW-MIB to manage TDM (T1, E1, T3, E3, NxDS0) pseudowire emulation, which carries circuit-mode traffic over packet-switched networks. It exposes both configuration data (TDM rate, configuration index references) and performance/fault-oriented counters, including elapsed time in the current interval, count of valid 15-minute and daily intervals, and current versus latched fault indications. Its monitoring value is centrally about circuit-emulation service health: it lets an operator detect configuration errors, track how long a pseudowire has been running cleanly, and see whether fault conditions are currently active or have been latched (occurred and cleared) — key indicators of TDM circuit degradation over a packet network. It explicitly depends on and supplements the base CISCO-IETF-PW-MIB, which provides the generic pseudowire structures this module extends for TDM specifically. It is deployed on Cisco routers/PE devices providing TDM circuit emulation services (CESoPSN/SAToP) in carrier and enterprise packet-transport networks. Engineers can download the CISCO-IETF-PW-TDM-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in CISCO-IETF-PW-TDM-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

  • Cisco routers (TDM pseudowire emulation)

Monitoring Examples

An operator would poll cpwCTDMTable/cpwCTDMEntry keyed by cpwCTDMIfIndex to check cpwCTDMRate against the expected T1/E1/T3 rate, and inspect cpwCTDMConfigError for provisioning mismatches. cpwCTDMCurrentIndications versus cpwCTDMLatchedIndications reveals whether a TDM fault (such as loss of signal on the pseudowire) is presently active or has cleared since last checked, while cpwCTDMValidIntervals and cpwCTDMTimeElapsed give the reliability window for the reported statistics. cpwCTDMNotifications would be the trap objects fired when a fault indication changes.

What Can Be Monitored

  • TDM pseudowire rate
  • configuration errors
  • current fault indications
  • latched fault indications
  • elapsed/valid monitoring intervals
Imported Objects

From CISCO-IETF-PW-MIB

cpwVcIndexOBJECT-TYPE

From CISCO-SMI

ciscoExperimentOBJECT-IDENTITY

From IF-MIB

InterfaceIndexOrZero

From PerfHist-TC-MIB

PerfCurrentCount
PerfIntervalCount

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

Counter32
Integer32
MODULE-IDENTITY
OBJECT-TYPE
Unsigned32

From SNMPv2-TC

RowStatus
StorageType
TEXTUAL-CONVENTION
TimeStamp
TruthValue

How to Use in IPNetwork Monitor

Example using cpwCTDMPerf1DayIntervalMissingPkts OID:

Select a Cisco router 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 cpwCTDMPerf1DayIntervalMissingPkts 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 missing packets (as detected via control word sequence number gaps). 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 (in packets), 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

Manages TDM pseudo-wire emulation (T1, E1, T3, E3, NxDS0) over packet networks.

Start monitoring Cisco routers 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 CISCO-IETF-PW-TDM-MIB