Fresh install on Asus P7T deluxe. Which has twin NIC's onboard. Both cards have cables attached to a switch with IP's from DHCP and a valid route to the internet.
Internet connectivity fails until either of the network cards is disabled.
Network manager should either disable one of the cards, bond the connection or route using a single connection until such point as that connection is disconnected and then fall back to the other.
Any idea why this fails ?
Update: Bug logged. https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/1018740