We are going to upgrade our CUCM7.1.3 to CUCM 7.1.5. We have 1 pub and 2 subs.
According to the Cisco document, once the software being installed, we just need to switch the version and the system will start and running with the new version.
My question is do we need to install the software on all 3 nodes and then switch the version or install on the pub first, restart the node without switch version, and do the same on the 2 other sub nodes and then switch version?
Are you getting this error “Installer User Interface Mode Not Supported. The installer cannot run in this UI mode. To specify the interface mode, use the -i command-line option, followed by the UI mode identifier. The value UI mode identifiers...
The below trick might come handy when you have to add a new node to a cluster but you don't have or is unsure of the security password for the publisher. This procedure has been around for ages.
1) Login into the CLI of the Publisher.