Ethereal-users: Re: [Ethereal-users] netflow from Cisco

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From: Gerald Combs <gerald@xxxxxxxxxxxx>
Date: Mon, 8 Apr 2002 15:59:15 -0500 (CDT)
On Mon, 8 Apr 2002, Annie Tong wrote:

> I'm wondering does ethereal read the captured netflow data from Cisco? 
>  Currently I'm using Flow-Tools to capture the netflow traffic exported 
> from Cisco 7507, and using Flowscan to anaylsis the raw data.  Ethereal 
> seems to be an interesting and useful tool and I would like to use it as 
> the traffic analyser if it's compatiable to Flow-Tool formatted raw data.

Flow-tools comes with a utility called "flow-export" that's supposed to be
able to convert flow data to something that should be readable by
Ethereal, tcpdump, and ntop.

I'm running flow-tools 0.56 here at work.  Its version of flow-export
segfaults every time I try to export libpcap data.  I tried the
flow-export that comes with 0.55, and it creates a data file readable by
tcpdump but not Ethereal.  I'll see if I can track down the problem.

Keep in mind that the flow data doesn't contain enough information to
completely reconstruct the packet data.  The flow-export man page also
mentions this:

BUGS
       The pcap format is a hack.



> Please advice.  Thank You!
> 
> Regards,
> 
> Annie Tong
> MAE Engineering
> MCI WorldCom
> 
> 
> 
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