Wireshark-dev: Re: [Wireshark-dev] NetXRay 2.2 fileformat
From: Stig Bjørlykke <[email protected]>
Date: Fri, 17 Aug 2007 19:02:27 +0200
Den 17. aug. 2007 kl. 18.43 skrev Guy Harris:

Do those 4 bytes show up at the beginning, or the end, of the frame?
For some frame types, we find either 4 bytes of FCS or 4 bytes of junk
at the end of the frame.
They are at the end of each frame.  Sometimes they have data and  
sometimes they are only zero's, so it may be junk.
Attached the first 220 bytes of a capture showing this.  This frames  
contains LAPB with a Supervisory frame, which shall not contain any  

Stig Bjørlykke

Attachment: msg.cap.gz
Description: GNU Zip compressed data