RC-CFM-MIB

MIB Reference — IPNetwork Monitor · Updated September 14, 2026

All MIBsRC-CFM-MIB

Organization: Nortel Networks

Last Updated: 2009-04-10

Category: Carrier Ethernet, Nortel Enterprise Data

Description: Manages IEEE 802.1ag Connectivity Fault Management MEPs and MIPs on Nortel Ethernet Routing Switch platforms.

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What Is RC-CFM-MIB?

RC-CFM-MIB is a Nortel/Avaya (Rapid-City/OE) enterprise MIB implementing IEEE 802.1ag Connectivity Fault Management on Ethernet Routing Switch platforms, managing Maintenance Domains, Maintenance Associations, Maintenance End Points (MEPs), and Maintenance Intermediate Points (MIPs) used to detect and localize Ethernet connectivity faults. It exposes configuration data (domain name, level, number of MAs/MIPs, event/trap enable, performance-monitoring enable) as well as control actions such as clearing statistics, and integrates with PBT (Provider Backbone Transport) status. This is fault- and performance-monitoring focused: it lets an operator detect loss of Ethernet connectivity, continuity check failures, and misconfigured maintenance levels across a carrier or enterprise Ethernet network, directly surfacing service-affecting faults rather than physical hardware sensors. It is the vendor implementation of the IEEE 802.1ag CFM standard, so its object model closely tracks that standard's Maintenance Domain/Association/MEP hierarchy. It is deployed on Nortel/Avaya Ethernet Routing Switches used in carrier Ethernet or large enterprise networks requiring end-to-end fault detection. Network engineers evaluating or troubleshooting this functionality can download the RC-CFM-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in RC-CFM-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/Avaya Ethernet Routing Switch

Monitoring Examples

An administrator walks rcCfmMaintenanceDomainTable/rcCfmMaintenanceDomainEntry, indexed by rcCfmMaintenanceDomainIndex, checking rcCfmMaintenanceDomainName, rcCfmMaintenanceDomainLevel, and rcCfmMaintenanceDomainNumOfMa to confirm the expected CFM hierarchy is provisioned, and enables rcCfmMaintenanceDomainEventTrapEnable to receive fault traps. If a service outage is suspected between two sites, the admin uses rcCfmMaintenanceDomainClearStats to reset counters and then monitors for new continuity-check failure traps (rcCfmTrap) to pinpoint where in the maintenance domain the fault occurred.

What Can Be Monitored

  • maintenance domain/association configuration
  • MEP/MIP counts
  • CFM fault event traps
  • continuity-check statistics
Imported Objects

From IF-MIB

InterfaceIndex
InterfaceIndexOrZero

From Q-BRIDGE-MIB

VlanIdOrNone

From RAPID-CITY

CfmNameString
EnableValue
rcCfmOBJECT-IDENTITY

From SNMPv2-SMI

Counter32
Counter64
Gauge32
Integer32
MODULE-IDENTITY
OBJECT-TYPE

From SNMPv2-TC

DateAndTime
DisplayString
MacAddress
RowStatus
TEXTUAL-CONVENTION
TruthValue

How to Use in IPNetwork Monitor

Example using rcCfmStatsTxCnt OID:

Select a Nortel/Avaya Ethernet Routing Switch 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 rcCfmStatsTxCnt 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 total Number of CFM messages are transmitted by trunk or ESM 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 Counter64-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

Rapid City Connectivity Fault Management for Ethernet operations and maintenance.

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Download RC-CFM-MIB