Alex Krenzel
Research engineer in Google's systems research group and a PhD student in UC Berkeley's Netsys lab, focused on networking research and the design and evaluation of Distributed SDN (DSDN) for large-scale WANs.
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Mar 6, 2026 • 57min
HN817: Is There a Better Way to Do Software Defined Networking?
Alex Krenzel, a Google systems research engineer and UC Berkeley Netsys PhD student, explores Distributed SDN (DSDN) for large-scale WANs. He explains running controller logic on routers, flooding state for a shared view, and using source routing to avoid consensus. They discuss convergence under churn, implementation tradeoffs, rollout strategies, and how DSDN could bring SDN benefits to smaller operators.
