Hi
I understand that you are worried about Downtime from your concerns below:
- When I create the cluster on the MM and make both MC's part of it, will they or the AP's lose there config?
- Is this possible anyway, when the controllers already have AP groups etc.
- Both MC's are in a different Hierachie level, do I have to move them to the same level or can they stay in there own level?
-When you are moving one MC to another folder or role, the MCs will be rebooting to reflect the changes, In general, the APs will reboot when they lose contact with the MC unless there is VRRP Standby/HA Backup/LMS-BLMS
-If you have VRRP IP already you can make use of it by pointing the Master IP to the VRRP IP, like in Aruba OS 6.x or you can use the LMS and BLMS if you are sure that APs have reachability to the both MCs already
-Then if you go ahead and change the MCs to the new Cluster folder, there will be no down time required
In your case, I would suggest you can keep one controller in the same folder and move the other controller and make the necessary changes.
This will help you to reduce the duration of the Downtime or no need of it at all.
Jeeva Selvakumar