Trying to add user defined port on ISR 4331 and I get the following:
(config)#ip port-map user-as-admin port tcp from 2001 to 2011
^
% Invalid input detected at '^' marker.
This was possible on a Cisco 2921.
ISR 4331 Cisco IOS XE Software, Version 17.03.02
Has this feature been dropped or is there alternative way of adding user defined ports.