Thanks for your replay, Tim. It's good that LinuxMCE will continue installation if it run again. But this might be a bug. And the main problem is the installation takes a lot of time and it's impossible to sit near PC to catch that case and bring up network interface.
P. S. I'm a Fedora guy. So, I prefer /etc/init.d/network restart

I really miss
service in Debian/Kubuntu