It randomly stops working as I'm working off a laptop, I click the option "Auto Ethernet" but it won't connect to the network again, I have to restart my laptop and then everything works fine but the connection eventually drops. I think it was after some update that I did, I am using 11.10.
closed as too localized by fossfreedom♦ Jan 3 '13 at 22:02
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This is due to a DHCP lease time with a router/DHCP router. Check this file and see what the renewal times are.
A lease looks like this.
If the times are too short than you will need to configure your DHCP server. If you are on a public network E.g. Starbucks, than your answer lies therein.