The debug Commands

debug condition user username

Sets conditional debugging for a specific user and generates output debugs related to the user

debug aaa authentication

Displays authentication information with TACACS+ client/ server interaction

debug aaa authorization

Displays authorization information with TACACS+ client/ server interaction

debug aaa accounting

Displays accounting information with TACACS+ client/server interaction

debug tacacs

Displays TACACS+ interaction between the IOS client and the AAA server

debug ppp negotiation

Sees if a client is passing PPP negotiation

debug ppp authentication

Sees if a client is passing authentication

debug ppp error

Displays protocol errors and error statistics associated with PPP connection negotiation and operation