I believe I see what you are saying.
vCSA and such are on the management network and connected with no Vlan ID... however why did I lost all connectivity to the host? I couldn't ping it either....
I was thinking a bit more and is it because I need to go into the DCUI and set Vlan 5 as the managment vlan?
This host was not built by me. So there are all sorts of settings that were changed in an effort to harden it (same with the switch).