Hi I have just added another HV to a cluster and its up and running fine. I can run VM's on it and migrate fro other HV's onto it. I do note however that in the manager there is no KVM version listed as installed however on other HV's in the cluster there is a version present. I see that the KVM version is slightly different on this new host but as i said apart from this visual issue everything appear to be running fine. These HV's are CentOS 6.3 using dreyou 3.1 Node where KVM version not showing in the manager node003 ~]# rpm -qa | grep kvm qemu-kvm-rhev-0.12.1.2-2.295.el6.10.x86_64 qemu-kvm-rhev-tools-0.12.1.2-2.295.el6.10.x86_64 Node where KVM version is showing in the manager node002 ~]# rpm -qa | grep kvm qemu-kvm-tools-0.12.1.2-2.295.el6_3.8.x86_64 qemu-kvm-0.12.1.2-2.295.el6_3.8.x86_64 thanks