Ethernet not reconnecting

I'm at a loss at this point. I'm having an issue where my ethernet won't reconnect with my Macbook Pro (15 in Mid 2012 base), generally when I put it to sleep–– take it to class, and then return to my dorm and plug it back in.

While researching a fix I discovered disabling and enabling the ethernet service fixes the issue. I automated this process by writing an application that utilizes the two commands:

Code:

sudo ifconfig en0 down
sudo ifconfig en0 up

Now I have to run a small app in order to connect to the internet. While this works, it is a band-aid and not a solution to my issue. I have already reset the NVRAM and the SMC and I am running 10.8.4. Does anyone have any idea as to what is causing my problem.