Ethernet Card の番号を変える eth0, eth1...
edit /etc/udev/rules.d/70-persistent-net.rules
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:50:56:81:5a:fa", ATTR{type}=="1", KERNEL=="eth*", NAME="eth1"
edit /etc/udev/rules.d/70-persistent-net.rules
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:50:56:81:5a:fa", ATTR{type}=="1", KERNEL=="eth*", NAME="eth1"