Comments on: Using the Enhanced Vmxnet Adapter and TSO in ESX VMs

By: vga to rca adapter

vga to rca adapter — Wed, 20 Jan 2010 10:39:41 +0000

Thank you for very good instruction. The article is quite technical but covered all necessary detail. I have bookmarked it in case I need this info in the future. Grateful if you can have more article like this.

By: Twitted by willemsej

Twitted by willemsej — Thu, 26 Nov 2009 14:47:27 +0000

[...] This post was Twitted by willemsej [...]

By: ESX/ESXi 3.5 Update 4 Released - PXE Boot ESXi Experimentally Supported | VM /ETC

Tue, 31 Mar 2009 04:15:35 +0000

[...] for the 32 bit versions of Windows Server 2003 as well as Windows XP. Update 4 appears to make my recent post on enabling the VMXnet driver [...]

By: craig

craig — Sat, 21 Mar 2009 08:48:07 +0000

thanks for the clarification.

By: rbrambley

rbrambley — Sat, 21 Mar 2009 07:09:09 +0000

Craig,

I realize now the original wording about checking for TSO support with
esxcfg-vmkernel was confusing / misleading. I've updated it. Thanks for
asking this question!

TSO is not enabled on a vmkernel portgroup. It's enabled in the VMKernel
by default in ESX and if your pNIC has the capabilities the VMkernel
will utilize it. You enable a VM to start using those capabilities by
selecting the enhanced vmxnet adapter. You do not need to have a
vkernel portgroup on a vSwitch for VMs to take advantage of TSO.

By: craig

craig — Sat, 21 Mar 2009 02:48:07 +0000

thanks for the clarification.

By: rbrambley

rbrambley — Sat, 21 Mar 2009 01:09:09 +0000

By: craig

craig — Fri, 20 Mar 2009 20:43:47 +0000

confused. if TSO is enabled on a vmkernel port, but a VM connects to a portgroup that connects to a vswitch that doesn't have a vmkernel configured, how can a VM use TSO?