Direct Connect ESXi Servers

Hello,

I am trying to directly connect 4 ESXi 5.1 servers to each other via 10GB nics. This is to get 10GB networking without having to pay for a 10GB switch which are spendy. I am able to get network connectivity from serverA to serverB but not serverB to serverC.  I have created a basic vswitch called 10gb on all hosts and directly connected serverA to serverB, serverB to serverC, serverC to serverD and serverD to serverA.

Not sure if this is even possible--hope so.

I am using the Intel x540 Dual port if it matters.

Thanks.