On Sat, Nov 30, 2002 at 09:47:54PM +0100, Jan Czmok wrote: > could it be the fibre to ethernet converter ? Could you elaborate what you meant with "i can either the mac adresses but ping does not work"? I didn't really understand this sentence. Can you see opposite sides MAC addresses or not? If you can, you probably have a layer 3 problem, not 2/1 Regards, Daniel