Switch-Centric Byzantine Fault Tolerance Mechanism in Distributed Software Defined Networks

Sol Han, Seokwon Jang, Hochan Lee, Sangheon Pack

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


Supporting byzantine fault tolerance (BFT) in distributed software-defined networks (SDNs) may lead to increased consensus delay and traffic load since all messages should be verified and multicasted among controllers. To address this problem, we propose a switch-centric byzantine fault tolerant (SC-BFT) mechanism, in which key BFT functions (e.g., message authentication and comparison) are implemented at the programmable switches. Thus, SC-BFT can accelerate the consensus procedure and mitigate the communication overhead. We implemented SC-BFT at BMv2 using P4. Analytical and simulation results show that SC-BFT provides 80% reduced response time compared to conventional BFT consensus mechanisms with significantly reduced communication overhead.

Original languageEnglish
Article number9121972
Pages (from-to)2236-2239
Number of pages4
JournalIEEE Communications Letters
Issue number10
Publication statusPublished - 2020 Oct


  • Byzantine fault tolerance
  • P4
  • programmable data plane
  • switch-centric

ASJC Scopus subject areas

  • Modelling and Simulation
  • Computer Science Applications
  • Electrical and Electronic Engineering


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