Nexus 9k switch is giving the error %TACACS-3-TACACS_ERROR_MESSAGE: All servers failed to respond

[parismita_0305]

i have recently configured 2 new Nexus 9k series switches 

i configured the tacacs and the aaa and i am able to ping the tacacs server from the switch. but when i try to login with my tacacs id and pw its not authenticating for some reason.

here are the error logs:

%AUTHPRIV-3-SYSTEM_MSG: pam_aaa:Authentication failed for user
%DAEMON-3-SYSTEM_MSG: error: PAM: Authentication failure for illegal user 
%TACACS-3-TACACS_ERROR_MESSAGE: All servers failed to respond

suggestions??

[Ganesh Hariharan]

i have recently configured 2 new Nexus 9k series switches 
i configured the tacacs and the aaa and i am able to ping the tacacs server from the switch. but when i try to login with my tacacs id and pw its not authenticating for some reason.
here are the error logs:
%AUTHPRIV-3-SYSTEM_MSG: pam_aaa:Authentication failed for user 
%DAEMON-3-SYSTEM_MSG: error: PAM: Authentication failure for illegal user 
%TACACS-3-TACACS_ERROR_MESSAGE: All servers failed to respond
suggestions??

Hi ,

what error logs are you seeing at TACAS server ..??

have a look on the TACAS integration with Nexus Switches ...

Hope it Helps...

-GI

[mkriss5681]

Seeing this as well in 7.0(3)I7(6). I see open bugs for the other Nexus lines, but not 9k. 

[Fincey]

I have 9Ks - On 7.0.3.i7.6 and 9.3.1 code I saw this issue.  

I was able to use the hidden command sync-snmp-password passwd userabc  1.2.3.4   

passwd - is the password of the user

userabc- TACACs authenticated account

1.2.3.4 - TACACs server address.    

The command will return to the CLI with no output.,  Nothing added to the running-config,  but the annoying, constant 5 min. interval  TACACs error messages stopped.   Tested on Version 9.3.1 on 9Ks.  Reload shows initial syslog "failed to respond" error, but it did NOT repeat in 5 min. intervals again.