Wireshark-users: Re: [Wireshark-users] 12 bytes before the IP header
From: Joerg Mayer <[email protected]>
Date: Fri, 7 Sep 2007 09:44:17 +0200
On Fri, Sep 07, 2007 at 12:23:54AM +0200, Aleksander Veksler wrote:
> Anyone have tips on how you loose a few bytes? I get 12 bytes between  
> the Ethernet header and IP header. This means that wireshark does not  
> recognize the IP header as, and I can't use any of the wireshark's  
> advanced features.
> Anyone know how to get rid of those bytes, or perhaps what they are?
> * My card is Intel Pro/Wireless 3945ABG
> * The wireless switch is D-Link DIR-635
> * The problem only happens in promiscuous mode, and only to the  
> packets not directed to my computer
> * I attach picture of a window of a sample http packet
> * Please help :)

Actually it looks like this packet might have a third mac at the beginning:
Is the length of 02 d7 really correct? Sending a packet would have
helped more than the image you sent and have been smaller.
After the third mac it looks to me that there is an ordinary LLC/SNAP

Joerg Mayer                                           <[email protected]>
We are stuck with technology when what we really want is just stuff that
works. Some say that should read Microsoft instead of technology.