You can enable DirectPath I/O with vMotion for virtual machines in a datacenter on a Cisco UCS system that has 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 Web site.


  1. Locate the virtual machine in the vSphere Web Client.
    1. Select a datacenter, folder, cluster, resource pool, or host and click the Related Objects tab.
    2. Click Virtual Machines and select the virtual machine from the list.
  2. Power off the virtual machine.
  3. On the Manage tab of the virtual machine, select Settings > VM Hardware.
  4. Click Edit and select the Virtual Hardware tab.
  5. Expand the Memory section, and set the Limit to Unlimited.
  6. Expand the Network adapter section to configure a passthrough device.
  7. Select a port profile with high performance enabled from the network drop-down menu and click OK.
  8. Power on the virtual machine.