Our UC4 Systems are called UC4 followed by a letter indicating the env., so my Production system is called UC4P.
This name is never going to be changed.
I have created DNS entries for all my AE servers. So in my Production system I have 4 AE servers and they have their own DNS entries, UC4P1, UC4P2, UC4P3 and UC4P4.
The DNS entries are also referred to from other places, such as in ucsrv.ini and in UC_SYSTEM_SETTINGS, key WP_MIN_NUMBER.
Using DNS gives me the flexibility when migrating from one OS version to the next, e.g. as in right now where I'm migrating from Window Server 2008 to Windows Server 2016. I just need to shut down the Engines, change the DNS pointer and then bring up my AE on the new servers.
On other benefit is that all our agents (we do have more then 10.000 agents in each UC4 system) are also connecting to the DNS entries of the AE Servers, e.g in the agents ini file I have added cp=UC4P1:2217.
/Keld.