AirPort Extreme: slow upload via ethernet, but fast via wireless I have a new dual-band AirPort Extreme base station (v7.6.1). I've used it to create a wireless network, and I also connect my Mac Pro (Early 2009, running 10.8.2) via ethernet. When I run a speed test on my iPhone (to test the wireless speed), I get an upload speed of 1.45 Mbps (not super fast, but I only pay for 1 Mbps so I'll take it). When I run the same test on the Mac Pro (to test the wired speed) I get only 0.13 Mbps. The AirPort Utility (v6.1) doesn't provide a lot of options, so I've been unable to resolve this. How can I fix my ethernet upload speeds?

In summary:

AirPort Extreme

Wireless Upload: 1.45 Mbps

Wired Upload: 0.13 Mbps
I fixed this by playing around with my network settings. In System Preferences > Network > Ethernet 1 > Advanced > Hardware I manually set the Speed to "100baseTX" and Duplex to "full-duplex" and my upload speeds have returned to normal.