Re: IPS technology question.

From: Richard Bejtlich (taosecurity_at_gmail.com)
Date: 08/30/05

  • Next message: Ron Gula: "RE: IPS comparison" 
    Date: Tue, 30 Aug 2005 16:12:39 -0400
To: "THolman@toplayer.com" <THolman@toplayer.com>

    On 8/30/05, THolman@toplayer.com <THolman@toplayer.com> wrote:
    > Hi David,
    >
    > A standard PCI bus (PCI-X, 133Mhz) is only capable of 1.06Gbps. This means
    > 530Mbs in, and 530Mbs out, not taking into account things like hard-disks,
    > logging/reporting and any packet inspection, which only serve to pull this
    > number down further.
    > It is architecturally impossible for a standard Intel platform to attain a
    > throughput of anything higher than 530Mbs, let alone the 2Gpbs you claim
    > below?
    > A further explanation of these figures may help clear things up?
    >
    > Regards,
    >
    > Tim

    Hi Tim,

    I do not build these systems for a living (like your company does),
    but I think you're quoting numbers for a standard 32 bit 33 MHz PCI
    bus (32 x 33 = 1056 Mbps). That's a theoretical maximum; users report
    something like 200-300 Mbps in production. The lowest-end PCI-X can
    handle more. I've seen user reports in the 500-600 Mbps range.

    Sincerely,

    Richard

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