Ethereal-users: Re: [Ethereal-users] Malformed Header Problem with Dantz Retrospect

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From: regulus <bmullins@xxxxxxxxxx>
Date: Wed, 09 Jun 2004 09:50:51 -0700
On Wed, 2004-06-09 at 09:39, Steven J. Backus wrote:
>   Apologies in advance if this is not a good place to ask about
> this.  I am using a disk backup program called Retrospect from
> Dantz.  The application is failing and the Dantz people say it is
> hardware or network related.  Every other application works fine on
> this machine, a Windows 2000 box.  Here's ethereal's output, does
> anyone know what hardware problem could cause this?  TIA.
> 
> Steve
> 
> 453.765578 155.100.176.25 -> 155.100.158.57 TCP [TCP Retransmission] dantz > 49166 [ACK] Seq=90548355 Ack=1124814 Win=49152 Len=12 TSV=698715 TSER=2045316676

> 453.791005 155.100.176.25 -> 155.100.158.57 TDS Unknown Packet Type: 0[Unreassembled Packet]

Googling on 'TDS protocol' gave me this page:

http://www.freetds.org/tds.html

which mentions that packets larger than 512 bits are fragmented by 
the protocol.

I've seen occasional problems with switches where the chipset doesn't
correctly forward some fragments after the first because it's assuming 
the presence of header fields that are missing in the following frames.

Try bypassing your switch and testing the backup again.

Breen
-- 
Breen Mullins                      408-435-8401x123 	  
SQA Engineer                       0xde05499b          
Asante Technologies, Inc.