You can enable TSO support on a virtual machine by using an enhanced vmxnet adapter for that virtual machine.


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


  1. Log in to the vSphere Client and select the virtual machine from the inventory panel.
  2. Click the Summary tab, and click Edit Settings.
  3. Select the network adapter from the Hardware list.
  4. Record the network settings and MAC address that the network adapter is using.
  5. Click Remove to remove the network adapter from the virtual machine.
  6. Click Add.
  7. Select Ethernet Adapter and click Next.
  8. In the Adapter Type group, select Enhanced vmxnet.
  9. Select the network setting and MAC address that the old network adapter was using and click Next.
  10. Click Finish and then click OK.
  11. If the virtual machine is not set to upgrade VMware Tools at each power on, you must upgrade VMware Tools manually.


TSO is enabled on a VMkernel interface. If TSO becomes disabled for a particular VMkernel interface, the only way to enable TSO is to delete that VMkernel interface and recreate it with TSO enabled.