With Fedora Core 5 running the kernel-xen0 kernel, everything's working fine. However, I need to run the kernel-xen kernel which supposed to have PAE enabled. However, with kernel-xen, the bridge and vif is not created. I'm seeing this in the xend-debug.log: Link veth0 is missing It suggested adding loopback.nloopbackus to the kernel which I have already done. I am still not able to bring up the bridge and vif's. What am I missing here? I've verified that the bridge module loads fine and bridge-utils is install. If this a bug? Thanks for any help.