IIH PDU
E538271
IIH PDU is a type of protocol data unit used by the IS-IS routing protocol to exchange intermediate system-to-intermediate system hello messages for neighbor discovery and adjacency maintenance.
All labels observed (1)
| Label | Occurrences |
|---|---|
| IIH PDU canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5678749 — 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: IIH PDU Context triple: [ISO 10589, definesPDUType, IIH PDU]
-
A.
IHE
IHE is a global healthcare initiative that promotes the coordinated use of established standards to improve the interoperability of health information systems.
-
B.
HIH
HIH is an honorific abbreviation used to refer to a female member of an imperial family bearing the style "Her Imperial Highness."
-
C.
LPPD
LPPD is the ICAO airport code for João Paulo II Airport, the main international airport serving Ponta Delgada in the Azores, Portugal.
-
D.
PCC.II
PCC.II is a specialized committee within the Inter-American Telecommunication Commission (CITEL) that focuses on radiocommunication matters, including spectrum management and related technical and regulatory issues.
-
E.
ICP
ICP (Initial Connection Protocol) was an early ARPANET protocol used to establish and negotiate initial connections between hosts before handing communication over to higher-level services.
- 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: IIH PDU Target entity description: IIH PDU is a type of protocol data unit used by the IS-IS routing protocol to exchange intermediate system-to-intermediate system hello messages for neighbor discovery and adjacency maintenance.
-
A.
IHE
IHE is a global healthcare initiative that promotes the coordinated use of established standards to improve the interoperability of health information systems.
-
B.
HIH
HIH is an honorific abbreviation used to refer to a female member of an imperial family bearing the style "Her Imperial Highness."
-
C.
LPPD
LPPD is the ICAO airport code for João Paulo II Airport, the main international airport serving Ponta Delgada in the Azores, Portugal.
-
D.
PCC.II
PCC.II is a specialized committee within the Inter-American Telecommunication Commission (CITEL) that focuses on radiocommunication matters, including spectrum management and related technical and regulatory issues.
-
E.
ICP
ICP (Initial Connection Protocol) was an early ARPANET protocol used to establish and negotiate initial connections between hosts before handing communication over to higher-level services.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
IS-IS protocol data unit
ⓘ
hello message ⓘ |
| belongsTo |
Interior Gateway Protocol
ⓘ
link-state routing protocol ⓘ |
| carriesInformation |
MTU information
ⓘ
area addresses ⓘ authentication information ⓘ circuit type ⓘ hold time ⓘ neighbor list ⓘ priority ⓘ system ID ⓘ |
| definedIn |
ISO 10589
ⓘ
RFC 1195 ⓘ RFC 5308 ⓘ |
| exchangedBetween |
IS-IS routers
ⓘ
intermediate systems ⓘ |
| fullName | Intermediate System to Intermediate System Hello Protocol Data Unit ⓘ |
| hasField |
PDU header
ⓘ
TLV fields ⓘ fixed header fields ⓘ |
| hasType |
LAN IIH PDU
ⓘ
Level-1 IIH PDU ⓘ Level-2 IIH PDU ⓘ Point-to-Point IIH PDU ⓘ |
| layer | network layer ⓘ |
| notUsedFor |
link-state database synchronization
ⓘ
routing information flooding ⓘ |
| relatedTo |
CSNP PDU
ⓘ
LSP PDU ⓘ PSNP PDU ⓘ |
| roleInIS-IS |
detects neighbor failure
ⓘ
discovers neighbors on a link ⓘ establishes adjacencies ⓘ maintains adjacencies ⓘ |
| scope | single link ⓘ |
| sentOn |
broadcast networks
ⓘ
point-to-point links ⓘ |
| timerAssociated |
hello interval
ⓘ
hold time ⓘ |
| transportedOver |
CLNS
ⓘ
data link layer protocols ⓘ |
| usedFor |
adjacency maintenance
ⓘ
hello message exchange ⓘ neighbor discovery ⓘ |
| usedInProtocol |
IS-IS
ⓘ
linked to:
IS‑IS
|
| usesEncoding | TLV (Type-Length-Value) ⓘ |
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: IIH PDU Description of subject: IIH PDU is a type of protocol data unit used by the IS-IS routing protocol to exchange intermediate system-to-intermediate system hello messages for neighbor discovery and adjacency maintenance.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.