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 Cisco's documentation at

    Launch the vSphere Client and log in to a vCenter Server system.

  • Power off the virtual machine.


  1. Log in to the vSphere Client and select the VMs and Templates inventory view.
  2. Right-click the virtual machine to modify and click Edit Settings.
  3. On the Resources tab, select Memory.
  4. Select Unlimited.
  5. On the Hardware tab, select the network adapter to configure as a passthrough device.
  6. Select a port profile with high performance enabled from the network label drop-down menu, and click OK.
  7. Power on the virtual machine.
    After the virtual machine is powered on, DirectPath I/O appears as Active on the Hardware tab of the virtual machine properties dialog box.