IETF 125: Delay/Disruption Tolerant Networking (DTN) 2026-03-16 03:30

Why It Matters

This work enables centralized SDN-style control in challenged networks such as space, rural, or intermittently connected environments, expanding where programmable networking can be applied and helping vendors and operators design resilient control planes. Standardizing encapsulation and delivery rules reduces interoperability risk and speeds deployment in high-delay/disruption scenarios.

Summary

At IETF 125 the DTN Working Group discussed adapting OpenFlow control channels to delay- and disruption-tolerant networking by encapsulating OpenFlow messages in the Bundle Protocol (BP). Presenters outlined an architecture where controllers and switches on DTN nodes treat OpenFlow messages as application data units, encapsulate them into BP bundles with one-to-one mapping, and apply fragmentation, ordering, caching and lifetime rules to handle long delays and intermittent links. A prototype built on ION/DTN demonstrated feasibility in satellite-like, intermittently connected environments. The session also covered ongoing document progress (including BTPU and DTN reliability work) and introduced a new responsible AD for the WG.

Original Description

Delay/Disruption Tolerant Networking (DTN) meeting session at IETF 125

2026-03-16 03:30

https://datatracker.ietf.org/group/dtn/about/