UCloud Tech

Aug 29, 2018 · Fundamentals

Turn Routing into Switching: OpenFlow Tricks to Simplify Cross‑Subnet Traffic

This article explains how to convert three‑layer routing into two‑layer switching (and vice‑versa) using OpenFlow and OVS, covering the differences between routing and switching, flow‑table configuration, ARP handling, TTL management, and practical Linux commands to achieve cross‑subnet communication without a traditional gateway.