Post again after subscribing the mail list. Hi guys I have an all in one ovirt environment which node installed both vdsm and ovirt-engine. I have setup the ovirt environment and it could work well. For some reasons, i have to use this ovirt with node's networking down(i unplugged the network cable) In such case, I noticed that i cannot start a VM anymore. I wonder if there is a configuration switch to enable a ovirt to work with node's networking down ? if not, may i possible to make it work by a easy way ? When i tried to start VM with ovirt API, it responses with: ```bash [root@74d2ab9cb0 ~]# sh start.sh <?xml version="1.0" encoding="UTF-8" standalone="yes"?> <action> <async>false</async> <fault> <detail>[Cannot run VM. Unknown Data Center status.]</detail> <reason>Operation Failed</reason> </fault> <status>failed</status> </action> [root@74d2ab9cb0 ~]# sh start.sh <?xml version="1.0" encoding="UTF-8" standalone="yes"?> <action> <async>false</async> <fault> <detail>[Cannot run VM. Unknown Data Center status.]</detail> <reason>Operation Failed</reason> </fault> <status>failed</status> </action> [root@74d2ab9cb0 ~]# ``` Attached the vdsm and ovirt-engine Thanks Zhijian