11-01-2023 02:52 PM
Hello
We will upgrading our CUCM from version 12.5.1.14900-63 to 12.5.1.18901-1, we have two nodes (Publisher and Subscriber)
Our upgrading action plan to moving all phones to Subscriber and upgrade the Publisher, and once the upgrade is done successfully return back the phones to Publisher and upgrade the subscriber.
Just need to make sure if that the correct way to upgrade the CUCM.
Appreciate your help
Thanks
11-01-2023 02:57 PM - edited 11-01-2023 02:57 PM
Hey
if your phones is allready using the sub as an stand-by server you dont need to move Them. The phones Will by Them self use the the sub as primary is the pub is down
11-01-2023 05:33 PM
You dont need to move the phones to subscriber if you have configured sub as your standby call control server. CM group defines the order of CUCM to which phones will register.
Here mentioned below will the process of upgrade.
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