The Catalyst 6500 Family delivers highly available secure converged network services for the Enterprise and Service Provider networks. Designed to address the increased requirements for gigabit scalability, high-availability, rich services, and multilayer switching in backbone, distribution, and wiring closet topologies as well as datacenter environments, the Catalyst 6500 Family delivers exceptional scalability and price/performance, supporting a wide range of interface densities, performance, and integration of powerful service modules. The Catalyst 6500 Family complements the Catalyst 4000 Family and Cisco 8500 Series switches, which continue to provide premier wiring closet and network-core solutions, respectively. Together, the Catalyst Family delivers a wide range of intelligent switching solutions, enabling corporate intranets, extranets, and the Internet for multimedia, mission-critical data, and voice applications.This Catalyst 6509-NEB 9-slot vertical-oriented chassis has back-to-front airflow and is ideally suited for service-provider environments or for those enterprise customer environments in which front-to-back airflow is preferred.