The Cisco Catalyst 4500 E-Series is a high-performance next-generation extension to the Cisco Catalyst 4500 Series. The new "E-Series" is composed of the Cisco Catalyst 4500 Series Supervisor Engine 6-E, E-Series line cards, and E-Series chassis that are designed for secure, flexible, nonstop communications with superior backward and forward compatibility delivering exceptional investment protection for organizations of all sizes. Features: * 24 gigabits per slot capacity * Up to 6 ports 10GE X2 or 12 ports 1GE SFP via TwinGig Converter Module * TwinGig modules must be used in groups of three: ports 1-3 or ports 4-6 * 10GBASE-X (X2) and 1GBASE-X (SFP) * Cisco IOS Software Release 12.2(40)SG or later * IEEE 802.3 * 24-gigabit bandwidth is allocated across six 10 Gigabit Ethernet ports (2.5:1) * L2-4 Jumbo Frame support (up to 9216 bytes) * Enterprise and commercial: designed for high-speed backbone, switch-to-switch applications, or small server farms