Catalyst 6500 series mixed media/fiber-based gigabit Ethernet interface modules are used in distribution and core layers, data-center and Metro Ethernet applications. This gigabit Ethernet interface module deliver wire-speed switched connectivity and support several switch fabric connections and traffic forwarding options. With a range of port densities and modular physical layer interfaces, this module also offer a choice of packet buffer depths for traffic shaping, and QoS granularity with varying number of queues and drop threshold options.