By default, TSO is activated on a Windows virtual machine on VMXNET2 and VXMNET3 network adapters. For performance reasons, you might want to deactivate TSO.


  • Verify that ESXi supports the Windows guest operating system. See the VMware Compatibility Guide documentation.
  • Verify that the network adapter on the Windows virtual machine is VMXNET2 or VMXNET3.


  1. In the Network and Sharing Center on the Windows control panel, click the name of the network adapter.
  2. Click its name.
    A dialog box displays the status of the adapter.
  3. Click Properties, and beneath the network adapter type, click Configure.
  4. On the Advanced tab, set the Large Send Offload V2 (IPv4) and Large Send Offload V2 (IPv6) properties to Enabled or Disabled.
  5. Click OK.
  6. Restart the virtual machine.