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HPE7-A02 · Question #55

An AOS-CX switch has this admin user account configured on it: netadmin in the operators group. You have configured these commands on an AOS-CX switch: tacacs-server host cp.example.com key…

The correct answer is A. The user is logged in and granted operator access. The configuration includes the command aaa authentication allow-fail-through, which specifies that if the TACACS+ server fails to respond (e.g., times out), the switch will proceed to the next authentication method in the sequence, which is local. In this scenario: The switch…

Troubleshooting and Monitoring Network Security

Question

An AOS-CX switch has this admin user account configured on it:

netadmin in the operators group. You have configured these commands on an AOS-CX switch:

tacacs-server host cp.example.com key plaintext &12xl,powmay7855 aaa authentication login ssh group tacacs local aaa authentication allow-fail-through A user accesses the switch with SSH and logs in as netadmin with the correct password. When the switch sends a TACACS+ request to the ClearPass server at cp.example.com, the server does not send a response. Authentication times out. What happens?

Options

  • AThe user is logged in and granted operator access.
  • BThe user is logged in and allowed to enter auditor commands only.
  • CThe user is logged in and granted administrators access.
  • DThe user is not allowed to log in.

How the community answered

(51 responses)
  • A
    69% (35)
  • B
    20% (10)
  • C
    4% (2)
  • D
    8% (4)

Explanation

The configuration includes the command aaa authentication allow-fail-through, which specifies that if the TACACS+ server fails to respond (e.g., times out), the switch will proceed to the next authentication method in the sequence, which is local. In this scenario: The switch first attempts to authenticate the user against the TACACS+ server. When the TACACS+ server fails to respond, the switch falls back to local authentication. The user netadmin is a local account configured on the switch and belongs to the operators group. As a result, the user is successfully authenticated locally and is granted operator level access.

Topics

#TACACS+#fail-through#authentication fallback#AOS-CX

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