Basic networking question - VM shows wrong(?) network speed

[Dennis100]

I'm new to vSphere and I have a couple of servers set up to test vSphere before I roll it out.

I have a HP DL380 server with a HP dual port 10Gb NIC.  This NIC is connected to a HP switch.  The switch is set up so the 2 ports are teamed.  If I boot the server under windows 2008 it shows 20Gb in the team's local connection status.

Booted as a ESXi 5.0 Host I have NIC teaming set up as:

Load Balancing:  Route based on IP hash

Network Failover Detection: Link Status Only

Notify Switches/Fallback: both to Yes

Both the NIC ports show under Active adapters (no standby adapters).

These NIC ports are only used for the default standard vSwitch0 (no other VM port groups defined).

On a Win 2008 R2 VM (same for a 2003 R2 VM) the local connection status shows 10Gb.  Shouldn't it show 20Gb?

I also noticed that if I backup one of these VMs (using Veeamzip) and restore to another server (Esxi 5.1 with a Intel 4 port Gb NIC teamed, same basic setup) it still shows 10Gb when the max available is 4Gb.  Shouldn't it show 4Gb?

[Dennis100]

Forgot to mention - VM NICs are set up as VMXNET 3.

I did a search and found that maybe this isn't fully unexpected behaviour.

In the above scenario

VM/Win 2008R2@10Gb <-> vSwitch0 <-> HP NIC(20Gb team) <-> HP Switch (20Gb team)

should I expect the VM to communicate at 20Gb @ the HP switch connect?

and in the above scenario

VM/Win2008R2@10Gb <-> vSwitch0 <-> Intel NIC (4Gb team) <-> HP Switch (4Gb team)

should I expect the VM to communicate at 4Gb @ the HP Switch connect?

What about to VMs on the host?

[jrmunday]

With the VMXNET3 adapter and the the VMware tools installed the guest network connection will show up as 10gb, regardless of the physical adapter speed - this is expected behaviour, and rather confusing at first especially when you only have 1Gb uplinks.

The reason is shows up at 10Gb, is because this is the speed that it is connected to the vSwitch and this would be the same in a physical scenario - ie. the speed that you're connected to the switch at is the speed shown on the guest.

[Dennis100]

Thanks.  I suspected as much, but wasn't able to find it in the documentation.