Cisco 6500 Series Switches are used by many organizations. It's been a reliable solution for many networks, which warrants the question: Why do people use the Cisco Catalyst 6500 Series switches? Well, it seems that there are some fundamental benefits that Cisco 6500 switches offer that make it an attractive solution for many networks. Cisco introduces the Cisco Catalyst 6509 Enhanced Vertical Chassis as part of the Cisco Catalyst 6500 Series of enhanced (E-Series) switches, delivering chassis with up to 1440 Gbps of system bandwidth capacity (80 Gbps/slot), enhanced cable management, and front-to-back airflow. Cisco Catalyst 6503-E Switch The Cisco Catalyst 6503-E switch chassis is the latest addition to the 6500 switch series featuring a 3 slot design with 4 rack unit height great for converged networks, remote access, data centers and e-commerce outfits with necessity to support other 6500 series routers. The Catalyst 6509-V-E switch is an enhanced version of the Catalyst 6509-NEB-A switch. The 9-slot (numbered from (1) right to (9) left), 21 RU, vertical chassis supports redundant power supplies, redundant supervisor engines, and redundant fan trays. It also supports a greater power capacity per slot than the Catalyst 6509-NEB-A switch chassis.