Maybe the thing to do is to turn on both interfaces -- that will give you a dual-link end node, which is something DECnet handles just fine. In fact, I've always argued that DECnet handles multiple connections to the same LAN much better than IP ever did, mostly because it addresses nodes rather than networks or interfaces. paul On Aug 28, 2012, at 11:54 AM, Mark Benson wrote: I tried to run a similar setup and found that Debian/Ubuntu's 'network-manager' process makes a really horrific mess of managing 2 interfaces. I ripped it out of Debian and used file entries in /etc/network/interfaces and /etc/resolv.conf I have no idea if Ubuntu will spit it's brain out if you try that on 12.04 as it's ver dependent on it in the GUI. -- Mark Benson http://markbenson.org/blog http://twitter.com/MDBenson On 28 Aug 2012, at 13:37, Mark Wickens <mark at wickensonline.co.uk> wrote: I think I've found it. My HP Microserver running Ubuntu 12.04 has two network cards in: eth0 and eth2.