On Thursday 28 June 2012 20:22, Steve Campbell wrote: > So what I'm asking is "Is it possible to create a xen VM that has two > virtual ethernet interfaces on a host that has only one real NIC"? IMHO you can create an empty* bridge interface on a virtualization host. *By 'empty' I mean no IP address and no real interfaces bridged. By the way, there's KVM already on CentOS 5.8, so if you're going to move to CentOS 6 you'd better try KVM now. The solution I proposed earlier works for me with KVM. KVM in C5.7 was not production-ready, but it did work. KVM absolutely requires CPU hardware virtualization extensions and requires 64bit CPU for any real production use due to RAM requirements. Best regards, Dmitry Mikhailov.