All MIBs › CFMEXTENSION-MIB
Organization: D-Link Corp.
Last Updated: 2009-09-26
Category: VLAN and Bridging
Description: Extends IEEE 802.1ag Connectivity Fault Management (CFM) with additional OAM objects for Ethernet service monitoring.
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What Is CFMEXTENSION-MIB?
CFMEXTENSION-MIB extends IEEE 802.1ag Connectivity Fault Management (CFM) with additional Operations, Administration and Maintenance (OAM) objects aligned to ITU-T Y.1731, used for Ethernet service-level fault and performance monitoring. Based on its stated scope ('the structure of CFM extension for ITU Y1731'), it would add Y.1731-specific OAM constructs — such as performance monitoring (delay/loss measurement) and additional fault indication objects — layered on top of the base CFM maintenance-domain/maintenance-association/maintenance-endpoint model. Its primary use is fault and performance monitoring of Ethernet service connectivity: detecting loss-of-continuity between maintenance endpoints and tracking Y.1731 performance metrics like frame delay and frame loss. It explicitly depends on the standard IEEE 802.1ag CFM MIB (and implicitly on ITU-T Y.1731) as its base model, extending rather than replacing it. It is deployed on carrier Ethernet switches and service-provider Ethernet access/aggregation equipment offering CFM/Y.1731-based OAM, and engineers evaluating this coverage typically start with a CFMEXTENSION-MIB download to load its definitions into a MIB browser.
IPNetwork Monitor allows you to monitor SNMP objects defined in CFMEXTENSION-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
- D-Link carrier Ethernet switches (Y.1731/CFM OAM)
Monitoring Examples
No object or table names were extracted for this MIB (sample_objects is empty), so specific OIDs cannot be cited with confidence; conceptually, an operator would use the base CFM MIB's maintenance-endpoint fault state together with this extension's Y.1731 performance objects to detect a continuity-check failure or a rise in measured frame delay/loss between two Ethernet service endpoints.
What Can Be Monitored
- Ethernet CFM continuity status
- Y.1731 frame delay measurement
- Y.1731 frame loss measurement
- maintenance endpoint fault indications
Imported Objects
From DLINK-ID-REC-MIB
| dlink-common-mgmt |
From IEEE8021-CFM-MIB
| Dot1agCfmMDLevel | |
| Dot1agCfmMepId | |
| dot1agCfmMaIndex | OBJECT-TYPE |
| dot1agCfmMaMepListIdentifier | OBJECT-TYPE |
| dot1agCfmMdIndex | OBJECT-TYPE |
| dot1agCfmMepIdentifier | OBJECT-TYPE |
From SNMPv2-SMI
| MODULE-IDENTITY | |
| NOTIFICATION-TYPE | |
| OBJECT-TYPE |
OIDs
RFC description
Connectivity Fault Management (CFM) extension MIB implementing ITU Y.1731 for D-Link switches and network devices.
Start monitoring D-Link carrier Ethernet switches (Y.1731/CFM OAM) 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.