This is single procesor machine but with Xeon multi-threading, so it could be problem.
> -----Original Message-----
> From: Guy Harris [mailto:guy@xxxxxxxxxx]
> Sent: Thursday, December 05, 2002 12:03 AM
> To: Kornel Zątek
> Cc: ethereal-users@xxxxxxxxxxxx
> Subject: Re: [Ethereal-users] Problem with Ethereal on Dell
> 2650 Server
>
>
> On Wed, Dec 04, 2002 at 11:51:33PM +0100, K.Zatek@xxxxxxx wrote:
> > I have a problem with Ethereal 0.9.7 on Dell 2650 Server.
> > In Capture->Start->Interface I haven't got any interface
> but : singn?
> >
> > When I try to capture something I have an error.
>
> If the server is a multiprocessor machine, neither Ethereal
> nor any other program that uses WinPcap will be able to
> capture packets:
>
http://winpcap.polito.it/misc/faq.htm#q-15
"Q-15: Why doesn't WinPcap work on my multiprocessor (SMP) machine?
WinPcap does not support on SMP machines, because we don't have multiprocessor computers on which to develop/test it. For this reason, recent versions have an initialization check that prevents them to load on SMP machines. Older versions don't have this check, so they are loaded by the operating system (the driver seems to work) but the results can be wrong (for example, several users reported wrong timestamps on SMP machines). Remember, it is not safe to run these versions under SMP machines, since blue screens (that is to say a crash of the PC) can happen."
If it is not a multiprocessor machine:
http://www.ethereal.com/faq.html#q5.11