Shortest Path Bridging (SPB)
E696066
Shortest Path Bridging (SPB) is an IEEE 802.1aq standard that simplifies and optimizes Ethernet network design by enabling shortest-path forwarding, multipath routing, and improved scalability in layer 2 networks.
All labels observed (4)
| Label | Occurrences |
|---|---|
| SPB (Shortest Path Bridging) | 1 |
| Shortest Path Bridging | 1 |
| Shortest Path Bridging (SPB) canonical | 1 |
| Shortest Path Bridging MAC-in-MAC | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T7835969 — 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: Shortest Path Bridging (SPB) Context triple: [Cisco FabricPath, competesWith, Shortest Path Bridging (SPB)]
-
A.
Rapid Spanning Tree Protocol
Rapid Spanning Tree Protocol is a network protocol that provides faster convergence and improved loop prevention in Ethernet switched networks compared to the original Spanning Tree Protocol.
-
B.
IEEE 802.1DP
IEEE 802.1DP is an IEEE Time-Sensitive Networking standard that defines profiles and requirements for reliable, low-latency communications in aerospace and similar mission-critical networks.
-
C.
IEEE 802.1ah
IEEE 802.1ah is an Ethernet networking standard, often called Provider Backbone Bridges (PBB), that enables scalable, MAC-in-MAC encapsulation for carrier-grade layer 2 networks.
-
D.
IEEE 802.1Qft
IEEE 802.1Qft is an amendment to the IEEE 802.1Q standard that specifies enhancements for deterministic, time-sensitive networking in bridged Ethernet networks.
-
E.
IEEE 802.1Qbh
IEEE 802.1Qbh is an Ethernet networking standard that defines bridge port extension mechanisms to support virtualized and distributed switching environments.
- 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: Shortest Path Bridging (SPB) Target entity description: Shortest Path Bridging (SPB) is an IEEE 802.1aq standard that simplifies and optimizes Ethernet network design by enabling shortest-path forwarding, multipath routing, and improved scalability in layer 2 networks.
-
A.
Rapid Spanning Tree Protocol
Rapid Spanning Tree Protocol is a network protocol that provides faster convergence and improved loop prevention in Ethernet switched networks compared to the original Spanning Tree Protocol.
-
B.
IEEE 802.1DP
IEEE 802.1DP is an IEEE Time-Sensitive Networking standard that defines profiles and requirements for reliable, low-latency communications in aerospace and similar mission-critical networks.
-
C.
IEEE 802.1ah
IEEE 802.1ah is an Ethernet networking standard, often called Provider Backbone Bridges (PBB), that enables scalable, MAC-in-MAC encapsulation for carrier-grade layer 2 networks.
-
D.
IEEE 802.1Qft
IEEE 802.1Qft is an amendment to the IEEE 802.1Q standard that specifies enhancements for deterministic, time-sensitive networking in bridged Ethernet networks.
-
E.
IEEE 802.1Qbh
IEEE 802.1Qbh is an Ethernet networking standard that defines bridge port extension mechanisms to support virtualized and distributed switching environments.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
Ethernet control protocol
ⓘ
IEEE networking standard ⓘ layer 2 network technology ⓘ |
| abbreviation | SPB ⓘ |
| appliesTo | Ethernet networks ⓘ |
| benefit |
eliminates need for spanning tree
ⓘ
improves bandwidth utilization ⓘ reduces convergence time after failures ⓘ simplifies network provisioning ⓘ |
| definedIn |
IEEE 802.1aq specification
ⓘ
linked to:
IEEE 802.1aq
|
| deploymentDomain |
carrier Ethernet networks
ⓘ
data center networks ⓘ enterprise campus networks ⓘ |
| designGoal |
increase network utilization
ⓘ
provide deterministic paths ⓘ simplify configuration of Ethernet networks ⓘ support large numbers of virtual networks ⓘ |
| field | computer networking ⓘ |
| hasVariant |
SPBM
ⓘ
SPBV ⓘ |
| layer | data link layer ⓘ |
| organization | Institute of Electrical and Electronics Engineers ⓘ |
| OSIlayer | Layer 2 ⓘ |
| purpose |
enable shortest-path forwarding
ⓘ
improve scalability in layer 2 networks ⓘ simplify Ethernet network design ⓘ support multipath routing ⓘ |
| replaces |
Multiple Spanning Tree Protocol
ⓘ
Rapid Spanning Tree Protocol ⓘ Spanning Tree Protocol ⓘ |
| SPBMstandsFor |
Shortest Path Bridging MAC-in-MAC
ⓘ
linked to:
Shortest Path Bridging (SPB)
|
| SPBVstandsFor | Shortest Path Bridging VLAN ⓘ |
| standardNumber | IEEE 802.1aq ⓘ |
| supports |
MAC-in-MAC encapsulation
ⓘ
VLAN-based services ⓘ equal-cost multipath ⓘ fast convergence ⓘ large layer 2 topologies ⓘ loop-free topology ⓘ multipath forwarding ⓘ provider backbone bridging ⓘ virtualized services ⓘ |
| topologyComputation | shortest path tree ⓘ |
| trafficEngineering | supports multiple equal-cost paths ⓘ |
| uses |
IS-IS
ⓘ
linked to:
IS‑IS
link-state routing ⓘ |
| workingGroup |
IEEE 802.1
ⓘ
linked to:
IEEE 802.1 standards family
|
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: Shortest Path Bridging (SPB) Description of subject: Shortest Path Bridging (SPB) is an IEEE 802.1aq standard that simplifies and optimizes Ethernet network design by enabling shortest-path forwarding, multipath routing, and improved scalability in layer 2 networks.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject linked to:
Shortest Path Bridging (SPB)
linked to: Shortest Path Bridging (SPB)
linked to: Shortest Path Bridging (SPB)