24 Gbps switching fabric (Catalyst 3550-12G and 3550-12T), 13.6 Gbps switching fabric (Catalyst 3550-48), 8.8 Gbps switching fabric (Catalyst 3550-24, 3550-24 PWR, 3550-24-DC, and 3550-24-FX)

• 12 Gbps maximum forwarding bandwidth at Layer 2 and Layer 3 (Catalyst 3550-12G 3550-12T), 6.8 Gbps maximum forwarding bandwidth at Layer 2 and Layer 3 (Catalyst 3550-48), 4.4 Gbps maximum forwarding bandwidth at Layer 2 and Layer 3 (Catalyst 3550-24, 3550-24 PWR, 3550-24-DC, and 3550-24-FX)

• 17.0 Mpps forwarding rate for 64-byte packets (Catalyst 3550-12G and 3550-12T), 10.1 Mpps forwarding rate for 64-byte packets (Catalyst 3550-48), 6.6 Mpps forwarding rate for 64-byte packets (Catalyst 3550-24, 3550-24 PWR, 3550-24-DC, and 3550-24-FX)

• 4 MB memory architecture shared by all ports (Catalyst 3550-12G, 3550-12T, and 3550- 48), 2 MB memory architecture shared by all ports (Catalyst 3550-24, 3550-24 PWR, 3550-24-DC, and 3550-24-FX)

• 64 MB DRAM and 16 MB Flash memory

• Configurable up to 12,000 MAC addresses (Catalyst 3550-12G and 3550-12T), Configurable up to 8,000 MAC addresses (Catalyst 3550-48, 3550-24, 3550-24 PWR, 3550-24-DC, and3550-24-FX)

• Configurable up to 24,000 unicast routes (Catalyst 3550-12G and 3550-12T), Configurable up to 16,000 unicast routes (Catalyst 3550-48, 3550-24, 3550-24 PWR, 3550-24-DC, and 3550-24-FX)

• Configurable up to 8,000 multicast routes (Catalyst 3550-12G and 3550-12T), Configurable up to 2,000 multicast routes (Catalyst 3550-48, 3550-24, 3550-24 PWR, 3550-24-DC, and 3550-24-FX)

• Configurable Maximum Transmission Unit (MTU) of up to 2,000 Bytes for bridging of MPLS tagged frames (Catalyst 3550-12G and 3550-12T), Configurable Maximum Transmission Unit (MTU) of up to 1,546 Bytes for bridging of MPLS tagged frames (Catalyst 3550-48, 3550-24, 3550-24 PWR, 3550-24-DC, and 3550-24-FX)