I have a used Cisco ASR and I cannot get into the switch. It looks to me that it either has a local username and password OR the configuration had TACACS on it.
I would like to know since its a now an offline, non-production router; if it had tacacs configuration on the router, would the router still be prompting for the TACACS credentials if we try consoling to the router ?
no it wouldn't - Usually when AAA is configured with Tacacs it is wise to apply a alternative logon access in case the Tacacs server Is unreachable
Usually you would specify the devices local user database also
Personally when am I working remotely I apply a "backdoor" access in the form of a rotary vtty port- This gives me access even if Tacacs is enabled
When I am on site and have direct access to the console as an small interim security measure I apply a console command - activation-character 64
This gives me a good measure of local security access without applying any global access control feature