I'm running Ubuntu 12.04 Server on VirtualBox. I'm trying to setup two interfaces with static IP addresses. If I only attach one network interface then eth0 works fine, but once I attach my second interface, eth0 doesn't work but eth1 does. I'm doing this because eth0 is my management subnet and eth1 is my admin/employee subnet. Below is how I've configured the /etc/network/interfaces file.