The IETF 123 Hackathon was held on the 19 and 20 July 2025 in Madrid, Spain. Organised by the Internet Engineering Task Force (IETF), the hackathon aimed to encourage developers and subject matter experts to discuss, collaborate, and develop utilities, ideas, sample code, and solutions that show practical implementations of IETF standards.
PREDICT-6G played a pivotal role in Challenge 1, ‘Controller Plane API and Intelligence’, which was part of the ‘Deterministic Networking’ session. The challenge consists of building on the open-source, DetNet-based dataplane of PREDICT-6G — an XDP/eBPF implementation that already supports PREOF (packet replication, elimination and ordering functions), and that runs DetNet over MPLS-in-UDP/IP. Currently, DetNet functionality is configured statically at boot time via JSON configuration files and there is no standardised way to interact with the dataplane dynamically. To address these issues, participants have designed and implemented a lightweight control and configuration API that interfaces directly with the dataplane and is accessible via REST/gRPC.
You can see the presentation given by David Rico (Universidad Carlos III de Madrid – UC3M), Carlos Bernardos (UC3M), Luis Miguel Contreras (Telefónica) and Marta Blanco (Telefónica) here.
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