To enable TSO at the virtual machine level, you must replace the existing vmxnet or flexible virtual network adapters with enhanced vmxnet virtual network adapters. This replacement might result in a change in the MAC address of the virtual network adapter.

TSO support through the enhanced vmxnet network adapter is available for virtual machines that run the following guest operating systems:

Microsoft Windows 2003 Enterprise Edition with Service Pack 2 (32 bit and 64 bit)

Red Hat Enterprise Linux 4 (64 bit)

Red Hat Enterprise Linux 5 (32 bit and 64 bit)

SUSE Linux Enterprise Server 10 (32 bit and 64 bit)