Hi, I have a OpenStack 3 controllers OpenStack Mitaka Setup I wanted to bring down all the controller machines to change the NIC on all nodes so what is the ideal way to do it without effecting or shutting-down running VMs Please share me necessary inputs to efficiently achieve my goal. Regards, Srikanth -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.openstack.org/pipermail/openstack-dev/attachments/20170725/7d72bd54/attachment.html>