Can't access with the default user of the router if the user is not in TACACS+

[pmarchal25]

Hi,

i have TACACS+ server installed and configured in a virtual machine (ubuntu 18.04) and i have a cisco router (IOS XR Configuration 7.8.2.11I) and the default user of the router is admin. I would like to know if there is a way to set up the admin user with the aim to have access to the router even though this user is not included in the TACACS+ server configuration. Right now, if the TACACS+ doesn't work, i can access to the router with the admin user, but if TACACS+ server is working and I exclude the admin user, i can't access to the router with this user.

Thank you so much.