Thanks for the info!
Yes, the reason why we are running Prom Mode is because we are running nested ESXi hosts, which are part of the lab kits for the official VMware courses. I wasn't involved in setting it up, but I assume that was the best design choice back then.
Could you point me in the right direction on where to find more information on how to run nested ESXi hosts without using Prom Mode port groups? Would upgrading vSphere and vCD to 5.5 help us get more alternatives on how to achieve this?
(Ping magander ) 