Hi I have a problem with running hosted engine with openvswitch. I have one cluster where the ovirt engine runs on the host, there it works and when starting a vm the interface definition looks like this: <interface type="bridge"> <address bus="0x00" domain="0x0000" function="0x0" slot="0x03" type="pci" /> <mac address="00:1a:4a:16:01:51" /> <model type="virtio" /> <source bridge="vdsmbr_2XMhqdgD" /> <virtualport type="openvswitch" /> <filterref filter="vdsm-no-mac-spoofing" /> </interface> The xml for that vm as fetched from vdsm does not contain virtualport tag nor does it use the correct bridge, it looks like this: <interface type="bridge"> <model type="virtio"/> <link state="up"/> <source bridge="ovirtmgmt"/> <address bus="0x00" domain="0x0000" function="0x0" slot="0x03" type="pci"/> <mac address="00:1a:4a:16:01:51"/> <filterref filter="vdsm-no-mac-spoofing"/> <bandwidth/> </interface> I.e. somewhere the definition is modified to contain the correct data to work with openvswitch On the other cluster where I try to run hosted engine I don't get the above behaviour. When the engine vm starts the interface settings are not modified to use the bridge in openvswitch, with the result that the vm fails to start: <interface type="bridge"> <model type="virtio"/> <link state="up"/> <source bridge="ovirtmgmt"/> <alias name="ua-430d692e-6ef0-4529-8af0-b37a53a11564"/> <address bus="0x00" domain="0x0000" function="0x0" slot="0x03" type="pci"/> <mac address="00:16:3e:0e:39:42"/> <filterref filter="vdsm-no-mac-spoofing"/> <bandwidth/> </interface> Last login: Thu May 10 16:23:48 2018 from 172.27.1.32 [root@h2 ~]# ovs-vsctl show dfcf7463-ce51-4115-9a3a-ecab9efa8146 Bridge "vdsmbr_H91hH5sG" Port "vdsmbr_H91hH5sG" Interface "vdsmbr_H91hH5sG" type: internal Port ovirtmgmt Interface ovirtmgmt type: internal Port "dummy0" Interface "dummy0" ovs_version: "2.9.0" I assumed first there is a hook that make the needed change, but the only hooks I can find that mentions openvswitch are ovirt_provider_ovn_hook and 50_openstacknet but both those would set the source bridge to br-int and not look up the dynamic name of the bridge as created by vdsm. One special thing about the host where I try to run hosted engine is that the there is a dummy port since otherwise I couldn't get vdsm to create the bridge, but that shouldn't affect changing the interface definition for the vm. Where should I look next?