Ethereal-users: RE: [Ethereal-users] large capture file hangs machine

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From: Jeff Foster <jfoste@xxxxxxxxxxxx>
Date: Wed, 18 Jul 2001 10:59:39 -0500
From: Nick Slywczuk
Sent: Wednesday, July 18, 2001 10:36 AM

> I have a simple question.  One of my clients needed me to do a weekend
> capture at their site.  The capture is quite large, about 84.1 meg.  When
I
> load it into ethereal either on my linux box or my win2k box it hangs it
or
> makes it really slow.  I increased the virtual memory on both boxes(yes i
> know it is called something different on the linux box), but it is still
> causing me problems.  Is there any way I can break the file int say 20 meg
> chunks to examine it? Or do I need to get more physical memory (the linux
> box has 128meg and the win2k box has 96meg).  Any helpful input will be
> appreciated, any flames will be sent either to /dev/null, or the recycle
bin
> depending on where i am sitting at the time :)


You can use the editcap program to copy a subset of packets to 
another file. You will want to use the -r option so the range you
enter is written to the output file not deleted from the output.
So the commands would look something like this -

editcap -r infile outfile1 1-10000
editcap -r infile outfile2 10001-20000


Good luck,
Jeff Foster
jfoste@xxxxxxxxxxxx

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