Hi, I'm trying to pass a physical network interface through to a domU. This seems to be impossible because the way xen wants to do it is incompatible with the way centos wants to do it. I followed documentation on http://www.xen-support.com/?p=151 and tried booting with 'pciback.permissive pciback.hide=(06:00.0)'. This gives a hint in dmesg "kernel: xen-pciback: backend is vpci", and the device is still visible in dom0. So this obviously doesn't work. Following http://wiki.xen.org/wiki/Xen_PCI_Passthrough: [root at heimdall ~]# xl pci-assignable-add 06:00.0 xend is running, which may cause unpredictable results when using this xl command. Please shut down xend before continuing. (This check can be overridden with the -f option.) [root at heimdall ~]# There doesn't seem to be any documentation about what xend does or is for and how to pass a physical network interface through with it. I'm starting to think that using centos for a server os is an extremely bad choice because nothing works. It's not like a Linux distribution but like a mess of pieces from several unrelated puzzles thrown together randomly. -- Knowledge is volatile and fluid. Software is power.