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    Design Considerations

    As seen in the Overview, designing a virtualized IT data center requires careful consideration of the three key segments of compute, network, and storage, along with their related subareas:

    • Compute
      • Virtual machines
      • Servers
      • Hypervisor switch
      • Blade switch
    • Network
      • Access
      • Aggregation
      • Core switching
      • Edge routing
      • WAN
    • Storage

    The design must also include careful planning of other architectural considerations:

    • Applications
    • High availability
    • • Class of service
    • Security
    • Network management

    In general, the design for the solution must satisfy the following high-level requirements:

    • The entire data center must have end-to-end convergence for application traffic of under one second from the point of view of the application.
    • Compute nodes must be able to use all available network links for forwarding.
    • Traffic must be able to travel between the points of delivery PODs.
    • Virtual resources must be able to be moved within a POD.
    • The out-of-band (OOB) management network must be able to survive the failure of the data plane within a POD.

    Published: 2015-04-20