I am planning to do a fresh installation of 12.3.4 DC RUM on new hardware provided. However, this is an existing customer using DC RUM 11.5 currently. There are around 80 software services, 200+ DMI Reports and around 50 alerts.
I read that from v 11.5 to 12.X, there were a lot of changes that happen in terms of naming of metrics and calculations.
I have a few questions that I hope I might be able to get some answers due to the tight timeline provided by the customer.
I've had a customer recently upgrade from 11.6 to 12.3. They did an upgrade, but much is pertinent for you.
DMI reports exported and imported successfully (customer asked me to check them all on a 12.3 environment before the upgrade).
I'd suggest you upgrade the RUM Console components, and CSS from 11.5 (double check the upgrade doco you may need a 11.6 or 11.7 step in here) to 12.0 and 12.3, so all that config is migrated. You could then add a new 12.3 CAS if you want to start with a fresh database.