We are currently trying to rearrange our network for performance. Having already begun to solve the issue that our network diagram looked like a straight line, I am now looking at the 4 nics for the virtual host.
As they currently are, 3 of the nics go to one switch, and one to another - but I get the feeling this was not so much a choice for design so much as a choice for what ports were free when it was installed.
Given an extremely simplified version of what our network looks like without the virtual host:
I am not sure whether I should be hooking all 4 of the nics to the central switch like so:
or distributing them so that any client has a short route to the host (but only to one of it's NICs), like so:
for the record, we are using vSphere eSXI vSphere 5.1, and the virtual machines being run provide entirely in-network services - none of them are internet-facing.
The layout of the nics <-> the vSwitch environment is: