That is correct - based upon the virtual port id assigned to the virtual NIC a single physical NIC is selctected for outbound traffic
Oh thats not so good then ...
I am not aware of anyone setting up load balancing within the guest OS of a VM depending on what type of traffic your VM is handling - if your VM is communicating to multiple IP address you might want to set the load balancing method to Route Based on IP Hash - which the vmkernel will look at every outbound packet and based on the originating IP address and destination IP address a physical NIC is selected for outbound traffic - so with multiple destinations for example a web or FTP with many sotes accessing the site you will do a better job of distributing the load across all physical NICs connected to the virtual switch.
Okay that might be beneficial, we have a lot of not full packets. I was concerned about interrupts, we have a single nic'ed reverse proxy... the plans are to move to 2 nic front and back, but for now. its 1 nic; so all traffic generates 2 int...
Are you running ESXi 5 and vCenter 5 because one enhancements is better control of network traffic -
For use licensing is definately better for us on V4.. might .. might look at Hyper V - if they can fix up their networking ...