In recent decades, networks have been defined by static, closed network solutions for the client-server era. The Aruba CX 8400 Switch Series is a groundbreaking campus core and aggregation switch solution with an innovative approach to addressing the demands of the mobility, cloud, and IoT era. With the modern, fully programmable ArubaOS-CX in a carrier-class chassis, the 8400 switch extends intelligence in the mobile-first architecture from the edge to the core components. ArubaOS-CX is a modern software system that automates and simplifies critical and complex network tasks, provides improved fault tolerance, and eliminates service interruptions during planned or unplanned events at the control level. The CX 8400 Switch Series delivers 10 GbE, 25 GbE, 40 GbE, and 100 GbE line rates in a modular chassis and, together with the Aruba 8320 Switch Series featuring a compact 1U form factor, completes the Aruba Mobile First Switching portfolio with a core and aggregation solution for enterprises.