On Tue, May 15, 2012 at 01:50:33PM +0100, James Bensley wrote:
Seems like your laptop isn't auto-negotiating with the switch correctly. You can manually force it 1000Mbps F/D; http://www.cyberciti.biz/faq/linux-change-the-speed-and-duplex-settings-of-a...
Stop right here. If you need to force the link speed something is broken. For starters you need to force it at both ends if you're going to do it at all, and GigE mandates autoneg works so if it's not there's something going wrong.
GigE needs all 4 pairs to be operational; have you tried a different cable to see if that makes a difference and/or checked to make sure it's firmly plugged in (I've seen a link fall back to 100Mb/s when the cable is loose at one end, but do GigE fine when firmly pushed in)?
J.