I am looking into optimizing traffic between VM's on multiple ESX hosts, and falling a bit short in figuring out which method would work best:
Currently the majority of my company connects via Terminal Servers over a private MPLS network. The Terminal Servers are hosted across two ESX Servers. The majority of our main applications are hosted on a 3rd ESX server.
My Corporate office is local to the servers and runs most of the software directly from their PC's.
The Corporate office vs Branch offices (coming in over MPLS) vs Servers are all already split across a few VLAN's to help isolate traffic.
What I am looking into/wondering is if it would be possible and beneficial to look into adding another 2 port NIC card onto my ESX hosts which is designed to handle traffic from a VM on one ESX to a VM on another VM - and if it is possible to do without modifying settings on the VM's themselves. Specifically setting up routes in the ESX hosts saying that any traffic going to specific IP's/range go over the other two NIC's.
Is that possible? Will it function? and would there be an advantage to doing this?
The connections are all currently 1GB to 1GB switches and there are 2 NIC's for the main LAN traffic. While it doesn't seem we are saturating the network yet, at the same time going over those 2 NIC's we have all of the information going from the TS to the user, plus all of the information going from the TS to the Application server. I ultimately want to isolate that without having to modify each of the VM's.