This is what is the Energy Efficient Ethernet.
The problem is, that in lot of environments it conflicts with other features and stuff so i really need to disable it.
I read that something can be achieved with:
ethtool --set-eee eth0 eee off
However this is the response i have to that command is:
Cannot get EEE settings: Operation not supported
It seems that my nic is not supported by ethtool. By lacks of documentation on internet and the real need of disabling this unuseful feature I wonder: how i can bypass ethtool and disable the feature on my nic ?
The nic should be this according
03:00.0 "Ethernet controller" "Realtek Semiconductor Co., Ltd." "RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller" -r15 "Gigabyte Technology Co., Ltd" "Motherboard"
Basically I'm trying to find a linux way to do what i normally can do under windows in this panel (in the image is an intel nic, but you got the point):