Hi ,
I beleve you are able to log in to the switch. If that is the case then issues these commands,
no tacacs-server host [ip]
no tacacs-server key [key]
no aaa authentication login default group tacacs+ local
no aaa authorization exec default group tacacs+ if-authenticated
no aaa authorization commands 1 default group tacacs+ if-authenticated
no aaa authorization commands 15 default group tacacs+ if-authenticated
no aaa authorization config-commands
If you have accounting also, do the same. And finally
no aaa new-model
But incase you are not able to login to the box using tacacs or local login then you need to do password recovery.
Thanks,
Jagdeep
