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Chapter 1: LAN Design25
throughput when Gigabit Ethernet ports are used. With the addition of multiple 10 GigabitEthernet uplinks on some enterprise-layer switches, 160 Gbps throughput rates can beachieved. Cisco uses the term EtherChannel when describing aggregated switch ports. Keepin mind that EtherChannel reduces the number of available ports to connect networkdevices.As you can see in Figure 1-21, four separate ports on switches C1 and D1 are used to createa 4-port EtherChannel. EtherChannel technology allows a group of physical Ethernet linksto create one logical Ethernet link for the purpose of providing fault tolerance and high-speed links between switches, routers, and servers. In this example, there is four times thethroughput when compared to the single port connection between switches C1 and D2.