License requirement for 6901 to register with cucm 8.6
Licensing Phone licensing is dependent on the call-control platform and its policies. For Cisco Unified Communications Manager Versions 7.1(3) and 7.1(4), the Cisco Unified IP Phone 6901 requires two device license units (DLU); for Cisco Unified Communications Manager Version 7.1(5) and later, the User Connect License (UCL) fee for basic phones will be applied to the Cisco Unified IP Phone 6901. There are no special license-plus-phone bundles for tier 2 distributors.
can we use DLU for 6901 -
How many DLUs required for 6901?
or is it essential to but UCL for register 6901 on cucm 8.6
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.