I have both a CUCM and UCXN cluster on MCS at 8.6.2 that I am migrating to UCS VM's with an endpoint of 9.1.2.
Do i need to migrate both the pub and sub of each cluster, or can I for each cluster migrate the pub (DRS backup/restore) at 8.6.2, then delete the sub on the migrated pub, re-ip address the pub, upgrade to 9.1.2, then add a new 9.1.2 sub, eliminating the need to do a restore/re-ip/upgrade on the sub?
This question is for both CUCM and UCXN. UCXN messages would be moved from the 8.6.2 to 9.1.2 on cut over day with COBRAS.
P.S. Sure wish PCD supported a 9.1 endpoint....