Chapter 23. Data Center Virtual Access (Nexus 1000V) QoS Design

A new paradigm has emerged in the data center, changing the definition and role of the server access layer. In years past, servers were directly connected to physical access switches, thus giving a clear demarcation point between the server and the network. With the prevalence of virtual machines (VMs), such as VMware ESX/ESXi and Microsoft’s Hyper-V, it is now possible to support numerous virtual servers on a single physical server.

This approach has helped consolidate the plethora of underutilized application-specific servers into far fewer physical servers that run multiple virtual operating systems on the same hardware. Today, the popularity this model has not only resulted in ...

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