Cisco Catalyst 4500 Supervisor Engine V: An extension of the Supervisor Engine IV offering higher capacity, nonblocking Cisco Layer 2-4 switching at 96 Gbps, with performance of 72 Mpps. Other enhancements include broadcast suppression in hardware, multicast suppression, enhanced QoS, and 802.1Q-in-Q in hardware. The Supervisor Engine V is required for the new Catalyst 4510R chassis and is compatible with all Catalyst 4500 Series chassis and existing Catalyst 4500 Series line cards for maximum deployment flexibility.