When installed ACS 4.11 on top of Rhel7.4 baseimage with libvirt-3.2.0 ,there is an issue with the metadata of the created VM in cloudstack.
It leads to password reset failure as the nuage vrs is not allowing passage to DomainRouter.
After debugging , it was found that the nuage-extension in metadata was missing.
When cloudstack-agent is preparing xml to be sent to openvswitch it contains metadata with nuage-extension block as follows
<interface mac='02:00:6c:fb:00:03' vsp-vr-ip='10.1.0.2'></interface>
In /var/log/openvswitch/vm-monitor.log , the received XML of VM is without nuage-extension block in metadata as follows:
Jan 15 18:17:17 ovs-1 vm-monitor.log: <metadata/>
So the metadata block is now empty. It seems libvirt 3.2.0 requires an url in its metada, so the libvirt namespace needs to be adapted.