On Sun, May 04, 2014 at 05:06:06PM +0800, yao xu wrote: vdsm 4.10 is pretty old (ovirt-3.2), and is no longer "supported", in whatever sense that "support" has upstream. Would you retry the operation with a more modern version (of ovirt-3.4)? Could you explain how you "replace a net interface"? Do you define a new network via GUI? Or are you refering to ovirt-node's TUI? What exactly do you do? What is the mode of failure? Is there no connectivity from node to the world? Or just to a specific storage server? Please share the relevant vdsm.log and supervdsm.log.