On Tue, Aug 31, 2004 at 02:48:55PM +0200, Christoph Kaegi wrote:
> 
> The switchport, the machine is connected to, is configured for 100/FDX
> and also, in /etc/rc.conf, I'm setting the NIC to 100BaseTX/FDX.

This is a bad idea.  When you configure most network interfaces, under
NetBSD at least, to fixed speed/duplex, you completely disable Nway
autonegotiation.  Many newer network interfaces (in particular, gigabit
PHYs) simply won't work (or won't work reliably) if you do that.

Set both ends of the link to autonegotiate and count your blessings.

Thor