Upgraded from CallManager 4.1 to 7.0(2), we don't use DNS Client. This must be a bug with rhosts and DNS client as I've seen it in other installs where DNS Client is set to no. I'm guessing rhosts is using a hostname instead of a ip address.
Unified CM Rhosts Checks the contents of the rhosts file on each installed server and returns a summary checking to see if they are equivalent.
The rhosts file on 10.75.250.103 does not match the publisher.
The rhosts file on 10.74.75.100 does not match the publisher.
The rhosts file on 10.75.250.102 does not match the publisher.
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.