You can enable DirectPath I/O with vMotion for virtual machines in a data center on a Cisco UCS system. The system must have at least one supported Cisco UCS Virtual Machine Fabric Extender (VM-FEX) distributed switch.


Enable high-performance network I/O on at least one Cisco UCS port profile on a supported Cisco VM-FEX distributed switch. For supported switches and switch configuration, see documentation at the CIsco website .


  1. Locate the virtual machine in the vSphere Web Client.
    1. Select a data center, folder, cluster, resource pool, or host and click the VMs tab.
    2. Click Virtual Machines and double-click the virtual machine from the list.
  2. Power off the virtual machine.
  3. On the Configure tab of the virtual machine, expand Settings and select VM Hardware.
  4. Click Edit and select the Virtual Hardware tab in the dialog box displaying the settings.
  5. Expand the Memory section, and set the Limit to Unlimited.
  6. Expand the Network adapter section to configure a passthrough device.
  7. Next to DirectPath I/O, click Enable.
  8. From the network drop-down menu, select a port profile with high performance enabled and click OK.
  9. Power on the virtual machine.