"[...] there will have been a better way to indicate what server [...]"
Head came round the door "All yours". So I headed off to the machine room to do my testing on the cold stand-by comms processor. The console was mounted on top of the unit. Hit the keys for debugger mode - machine stops. Sudden howl of anguish behind me.
There were two comms processors. That day they had decided to use the stand-by one for the official acceptance time trials. Thankfully the presiding government official allowed that as a genuine mistake that did not affect the acceptance criteria - and the repeat run was ok.
After that there was a large notice on whichever one was the live machine.
Biting the hand that feeds IT
