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Bring performance and reliability to your network with the Aruba Core, Aggregation, and Access layer switches. Discuss the latest features and functionality of the ArubaOS-Switch and ArubaOS-CX devices, and find ways to improve security across your network to bring together a mobile first solution.

Aruba 2930M model JL324A

  • 1.  Aruba 2930M model JL324A

    Posted Dec 20, 2018 10:05 AM

    Hi community

    Let´s generate some controversy for this model just to have a clear view of some interesting concepts.
    Datasheet points out these values ​​(by the way, it seems that in the QuickSpec there are different values ​​which might be erroneous):

     

    • Stacking performance: 100 Gbps
    • Switching capacity without stack: 320 Gbps
    • Switching capacity including stack: 420 Gbps
    • Throughput: 112 Mpps

    The worst (most demanding) scenario about ports for this model is:

     

    • 24 x 5 Gbps downlinks
    • 04 x 10 Gbps uplinks
    • 02 x 25 Gbps stack

    The switching capacity required for the uplink and dowlink ports would be 320 Gbps (in+out value) - Just add speeds in and out.
    The switching capacirty required for the stack ports would be 100 Gbps (in+out value) - Just add speeds in and out.

    If we make some calculations, the forwarding rate (throughput) for the worst port scenario should be at least:

    without stack: 238 Mpps (160 Gbps x 1.488 Mpps per Gbps)
    with stack: 312 Mpps (210 Gbps x 1.488 Mpps per Gbps)

    Why throughput for this model is far below: 112 Mpps?
    Would this mean that the 2930M is not a non-blocking device from the throughput perspective?

    Regards

     


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    #2930M