The Catalyst 6500 Series sets the new standard for IP communications and application delivery in enterprise campus and service provider networks by maximizing user productivity and enhancing operational control while providing unprecedented investment protection. As Cisco's premier intelligent multilayer modular switch, the Catalyst 6500 Series delivers secure, converged services, end-to-end, from the wiring closet to the core, to the data center, to the WAN edge.The 3-slot Catalyst 6503 chassis offers a compact 4 rack-unit height that is ideally suited for multi-Gbps secure data centers, remote access, e-commerce, and converged network solutions. The Catalyst 6503 chassis supports Catalyst 6500 series end-to-end operational consistency benefits.This Catalyst 6503 chassis includes 1A-2GE Supervisor Engine.