Classically, one has considered doing this as best practice for a long time.This was necessary in case you had port security active or other features. But with the actual firmware supporting so many of those things, it is not any more a must.
LIke in the classic callmanager design, where one had the phones in a voice vlan, with the sofclients, there are anyway various vlans and subnets involved today. Therefore such strict approaches are over.
Have your TP infrastructure in your infrastructre/server or whatever you call it vlan at least. With the clients, its up to you. Just make sure you have a transparrent connection as possible not getting into trouble with inhouse firewalls.
If your TP environment is serviced by an outside organization, it certainly may look different.
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.