Ethereal-users: [Ethereal-users] Dropped packets while Capturing to a File - How can I tell??

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From: "Feeny, Michael (TD&DS, Applications Infrastructure Svcs.)" <michael_feeny@xxxxxx>
Date: Mon, 9 Jan 2006 20:10:19 -0500

Hi,

 

I am capturing with Ethereal (0.10.13) on a virtual Windows 2000 server, which is running atop VMWare, and Ethereal is experiencing packet drops.  This is based on seeing “Drops: 522” at the bottom of capture screen, and from numerous “Previous Segment Lost” warnings within the packet list.

 

After reading the Ethereal Performance Wiki, I will try increasing the buffer size (it’s only 1MB now), and I’m hoping this will improve things.  But my question involves recognizing packet drops in a capture file.

 

I almost always capture to files, and then analyze the files later.  Had I not seen the “Drops:  522” at the bottom of the screen, I would not have realized packets were getting dropped.  Is there any way, when looking at a capture file created by Ethereal, to know if packets were dropped?  From the “Drops: 522” message, it seems that Ethereal recognizes drops when they occur.  Does Ethereal indicate drops in the capture file???  (I looked, but I did not find such an indication.)

 

Thx much,

Michael

 

Michael Feeny

TDDS Application Integration Management

609-274-2761 (Office)

484-995-1745 (Mobile)

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feenyman99 (AIM)

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