Hello xxrazorflamexx, strangely, but maybe not related, I have the same problem. Not so much since installing Mavericks, but since switching Internet provider. At first it worked fine, then it went to a self defined IP, then it went to (and has stuck at) cable unplugged. My wife's iMac, which is connected straight to the modem, suffered the same fate.
It turned out her Mac could not handle the energy settings (energysavingmode and 100 base ethernet) of the new modem. Problem solved for her when I switched the modem port to permanent Gigabit. It couldn't handle the energy saving settings of the modem for Gigabit either.
My own connection is over a switch since the switch, which saves energy by shutting down unused ports. No problem for the windows computer in our network, but I am having the same problems as the iMac. And I cannot alter the switch settings.
What I have read elsewhere is that the problem has to do with Apple's basic software: when the computer starts up, or wakes, it sends a signal over the ethernetcable to the modem (or in my case switch). If it does not receive a signal back in a certain (??) time period, it times out and just assumes no cable is connected. No retries.
That ties in with the solution I found for the iMac (permanently enabled Gigabit Ethernet replies in time, while energy saving systems, switch and original modem settings, do not). I don't know if this helps you, but it might point to possible solutions.
I have tried manually setting the ethernet speed, full or half-duplex etc.. No luck. You could try that.
Still to come is resetting the BIOS, and after that looking for networking kexts that work. No real solution as yet, but will let you know.
Luckily we have a Macbook as backup....
