The Catalyst 6000 Family supports a number of features designed to protect customer investments. Both the Catalyst 6000 and 6500 Series support the same line-card modules, supervisors, and power supplies, enabling common sparing and cost-effective performance upgrades. Interface flexibility is supported on all Gigabit Ethernet ports, such that interface requirement changes do not require a completely new module, but can be satisfied by a simple Gigabit Interface Converter (GBIC) change. And since the Catalyst 6000 Family leverages the industry-leading software and management infrastructure of the Catalyst family, customers can apply their existing knowledge of Cisco IOS, command-line interface (CLI), CWSI, and CRM tools without the need to learn a new CLI or management system.Modular chassis within both Catalyst 6000 and 6500 Series, are offering slot densities of 6- and 9-slot systems. Catalyst 6006, 6009, 6506, and 6509 support a wide range of configuration and price/performance options. Both switches series support the same suite of supervisors, interface line cards, and common equipment, easing sparing requirements and protecting investments with upward performance migration.