>So if I got it right, you have an asymetric perfomance, full in uploading, but bad when downloading?
The switch is not configurable, and yes, the default should be auto.
Using Debian: Where do I see the mode the NIC is in? Ifconfig output doesn't show this. And how do I configure 100Full with Debian?
I temporarily solved the problem by turning off the onboard NIC and using a 100 MBit/s NIC instead. Everything works just fine now.
But I am still interested in the answers to my questions above. I would prefer to use the onboard NIC as the switch might be replaced by a 1 GBit/s one.