Hi stickyrice ... A few questions to help us help you:
- Are both NICs wired ? ... or is the DHCP-configured (secondary) interface wireless ?
- Are you expecting both connections to be live simultaneously ? To me, this would be an unusual objective, unless you are connecting to 2 different networks, and even then, the setup would be quite particular.
- If you are NOT expecting both to be live simultaneously (most likely), when unplugging the ethernet cable from the primary interface, are you also instructing your system to set it DOWN ? For example:
Code:
# ip link set em1 down
would be the command I would use in Arch ... Are you then issuing a command to bring the secondary interface UP to obtain an IP address ?
- What network configuration system are you using ? I am afraid I'm not that familiar with Ubuntu.
Catch up with you once you get back to us ...