Recently, I started to get problems with network. It gets fixed by reboot, but there must be a better solution.

I noticed, that when network doesn't work, interfaces are named eth0 and eth1_rename. After reboot, they're eth0 and eth1, and following messages show up in logs:

Jan 18 13:13:45 localhost kernel: [    9.980921] udev: renamed network interface eth0 to eth1
Jan 18 13:13:45 localhost kernel: [   10.025451] udev: renamed network interface eth1_rename to eth0
Also, that probably started around time, when I've removed wlan0 board. How can it be fixed?