VMware NSX 6.3 introduces a new feature called the Controller Disconnected Operation Mode (CDO) mode that provides additional resiliency for the NSX control plane. Prior to CDO mode, the data plane is still running during the control plane outage, provided there are no changes, such as VM movement from one ESXi host to another ESXi host. If there is a new VM powered on or a VM is vMotioned to a new ESXi host that is not part of the VTEP table, there would be a data plane disruption due to the stale VTEP table.
With the CDO mode, VMs can be vMotioned or powered on during the control plane outage. The CDO mode works for single site deployment, Cross-vCenter deployment, and deployment with the ...
