If I'm right (correct me if I'm wrong), you login locally to ASG and use the following command:
show wich NIC('s) are up: "ifconfig"
This will show if "eth0" or "eth1" is up. Then use the following command on the interface which is NOT up: "ifconfig ethx up" where the x is the number which NIC isn't up. Also don't use the quotes ("") when typing this in the CLI (Command Line Interface). NOTE: login as user and change to root or login directly as root.