Without a license, the following restrictions will prevent you from creating additional VDCs:
Only the default VDC can exist and no other VDC can be created.
On all supported Supervisor modules, if you enable the default VDC as an admin VDC, you can only enable one nondefault VDC.
The show license usage you included within your post indicates that you have neither the Advanced Services License nor VDC License and this means you're restricted according to the bullet points above.
If you need to use VDC now then you need to purchase the Advanced Services license. Note that you can enable a 120-day grace period with the license grace-period command within global context such that you could at least get the router configured as you want it, and install the license when you get it. Beware that any features enabled under a license grace period will be disabled at the end of the 120-days so ensure you get the license if you take this approach.
If you don't need VDC immediately or are not sure if you'll ever need them, then it may still be worth configuring the default VDC as the admin VDC, and then create a nondefault VDC as per the second bullet above. This would simplify matters at a later stage if you did want to add VDC.
This document will provide screenshots to outline the steps to setup
TACACS+ configuration to ACI and also the configuration required on
Cisco ACS server. Please find the official Cisco guide for configuring
TACACS+ Authentication to ACI:
Is it supported or NOT supported? It's a frequently asked question.
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