[Cflowd] RE: [flow-tools] Support of sampled CFLOWD

From: Scott Sheppard (scott.sheppard@arch.bellsouth.net)
Date: Tue Feb 11 2003 - 10:13:22 PST

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    I am a new user of flow tools. I can see how to capture Netflow Ver 5
    records. I will be using CFLOWD ver 5 sampled at 1 in 1000 packets. My
    questions are

    1) will flow tools support this
    2) If so how to I correct for the fact that I am sampling data rather than
    capturing the full stream.


    Scott Sheppard MS, MBA, MS
    Sr Network Engineer
    BellSouth Dot Net
    404 499 5539
    page scott.sheppard@imcingular.com

    -----Original Message-----
    From: flow-tools-admin@splintered.net
    [mailto:flow-tools-admin@splintered.net]On Behalf Of Craig A. Finseth
    Sent: Tuesday, February 11, 2003 9:47 AM
    To: flow-tools@splintered.net; cflowd@caida.org
    Subject: Re: [flow-tools] Typical Hardware

    >>I would like to do an informal survey of the type of hardware that
    >>people on this list are using for running flowtools and or cflow

    We collect flows from about 19 routers using about a dozen small Suns.
    Data is forwarded to a single Sun 280 with dual 900 MHz processors, 1
    GByte of memory and a half-terabyte of raid disk.

    Total raw data size is about 4 GBytes/day, compressed.

    It takes 12-18 hours to process one days' data.

    We use the data for usage and performance reasons, not real-time
    attack analysis.



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