Forwarding rates are important to consider when selecting a switch If the

Forwarding rates are important to consider when

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Chapter 1: LAN Design 25
throughput when Gigabit Ethernet ports are used. With the addition of multiple 10 Gigabit Ethernet uplinks on some enterprise-layer switches, 160 Gbps throughput rates can be achieved. Cisco uses the term EtherChannel when describing aggregated switch ports. Keep in mind that EtherChannel reduces the number of available ports to connect network devices. As you can see in Figure 1-21, four separate ports on switches C1 and D1 are used to create a 4-port EtherChannel. EtherChannel technology allows a group of physical Ethernet links to 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 the throughput when compared to the single port connection between switches C1 and D2.

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