CFM PDU
E1028799
CFM PDU is a type of network message used in Ethernet connectivity fault management to monitor, detect, and diagnose faults in carrier and enterprise networks.
All labels observed (1)
| Label | Occurrences |
|---|---|
| CFM PDU canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T13215537 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: CFM PDU Context triple: [IEEE 802.1ag, definesProtocolDataUnit, CFM PDU]
-
A.
CSNP PDU
CSNP PDU (Complete Sequence Number PDU) is a type of IS-IS protocol message used to advertise a router’s full link-state database to its neighbors for synchronization.
-
B.
CFM
CFM is the abbreviation commonly used for the Council of Foreign Ministers, a diplomatic body composed of the foreign ministers of member states.
-
C.
PCEF
PCEF (Policy and Charging Enforcement Function) is a core network element in telecommunications that enforces policy and charging rules for data traffic as defined by the Policy and Charging Rules Function (PCRF).
-
D.
PCF
PCF (Policy Control Function) is a 5G core network component responsible for centralized policy management and decision-making for network behavior and quality of service.
-
E.
PCF
PCF is the abbreviation for the French Communist Party, a left-wing political party in France rooted in Marxist and communist ideology.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: CFM PDU Target entity description: CFM PDU is a type of network message used in Ethernet connectivity fault management to monitor, detect, and diagnose faults in carrier and enterprise networks.
-
A.
CSNP PDU
CSNP PDU (Complete Sequence Number PDU) is a type of IS-IS protocol message used to advertise a router’s full link-state database to its neighbors for synchronization.
-
B.
CFM
CFM is the abbreviation commonly used for the Council of Foreign Ministers, a diplomatic body composed of the foreign ministers of member states.
-
C.
PCEF
PCEF (Policy and Charging Enforcement Function) is a core network element in telecommunications that enforces policy and charging rules for data traffic as defined by the Policy and Charging Rules Function (PCRF).
-
D.
PCF
PCF (Policy Control Function) is a 5G core network component responsible for centralized policy management and decision-making for network behavior and quality of service.
-
E.
PCF
PCF is the abbreviation for the French Communist Party, a left-wing political party in France rooted in Marxist and communist ideology.
- F. None of above. chosen
Statements (50)
| Predicate | Object |
|---|---|
| instanceOf |
Connectivity Fault Management message
ⓘ
Ethernet OAM message ⓘ network protocol data unit ⓘ |
| conformsTo |
IEEE 802.1Q CFM framework
ⓘ
linked to:
IEEE 802.1ag
|
| definedIn | IEEE 802.1ag ⓘ |
| enables |
on-demand fault diagnostics in Ethernet networks
ⓘ
proactive monitoring of Ethernet services ⓘ |
| hasField |
CFM header
ⓘ
EtherType ⓘ MD level ⓘ TLVs ⓘ destination MAC address ⓘ flags ⓘ opcode ⓘ source MAC address ⓘ |
| layer | data link layer ⓘ |
| operatesAt |
maintenance association level
ⓘ
maintenance domain level ⓘ |
| protocolFamily | Ethernet ⓘ |
| purpose |
connectivity monitoring
ⓘ
fault detection ⓘ fault localization ⓘ fault verification ⓘ performance monitoring (with Y.1731 extensions) ⓘ |
| relatedConcept |
Operations Administration and Maintenance (OAM)
ⓘ
linked to:
Operations Administration and Maintenance
continuity check message (CCM) ⓘ linktrace message (LTM) ⓘ linktrace reply (LTR) ⓘ loopback message (LBM) ⓘ loopback reply (LBR) ⓘ |
| relatedTo | ITU-T Y.1731 ⓘ |
| scope |
end-to-end Ethernet service paths
ⓘ
segment-level Ethernet paths ⓘ |
| supportsFunction |
alarm indication
ⓘ
continuity check ⓘ linktrace ⓘ lock reporting ⓘ loopback ⓘ remote defect indication ⓘ test signal generation ⓘ |
| transportedOver |
Ethernet frames
ⓘ
linked to:
IEEE 802.3 MAC frame
|
| triggeredBy | OAM processes in network elements ⓘ |
| usedBy |
maintenance association end points (MEPs)
ⓘ
maintenance intermediate points (MIPs) ⓘ |
| usedFor |
carrier-grade Ethernet operations
ⓘ
fault management in VLAN-based services ⓘ service-level OAM in Ethernet ⓘ |
| usedIn |
Ethernet Connectivity Fault Management
ⓘ
linked to:
Connectivity Fault Management
carrier Ethernet networks ⓘ enterprise Ethernet networks ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: CFM PDU Description of subject: CFM PDU is a type of network message used in Ethernet connectivity fault management to monitor, detect, and diagnose faults in carrier and enterprise networks.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.