What bios feature shuts down the ethernet port when computer is shut down?

Turboman750

Honorable
Feb 2, 2013
179
0
10,690
I'm trying to set up a wake on lan feature on my home pc (asrock z77 extreme 4 mobo) and wake it up from my android smart phone. So far the app works great, but after 10-20 minutes of the pc being in the powered off state, the ethernet port gets powered off which makes it impossible to wake it using wake on lan.

Anybody know how to solve this problem?