A company has HPE Aruba Networking APs managed by HPE Aruba Networking Central. You have set up a WLAN to enforce WPA3 with 802.1X authentication. What happens if the client fails authentication?

In an 802.1X authentication process, the Access Point (AP) acts as the authenticator, relaying messages between the client (supplicant) and the authentication server (e.g., RADIUS). If the client provides invalid credentials or fails to meet policy requirements, the authentication server sends a RADIUS "Access-Reject" message to the AP. Upon receiving this message, the AP terminates the authentication session with the client. The client fails to associate with the WLAN and is effectively dropped from the network, unable to pass any traffic.

A. The AP assigns the client to the WLAN's default role. Incorrect. The default role is assigned to a client only after successful 802.1X authentication.
C. The AP assigns the client to the WLAN's critical role. Incorrect. The critical role (or AAA Down Role) is a fallback mechanism used only when the authentication server is unreachable, not when a client fails authentication.
D. The AP assigns the client to the WLAN's initial role. Incorrect. The initial role is for unauthenticated clients, typically to grant access to a captive portal. A failed 802.1X attempt is a terminal failure, not a transition to a pre-authentication state.

1. HPE Aruba Networking Documentation

ArubaOS 8.10.0.0 User Guide

Reference: Chapter "Role-Based Access Control"

Section "Understanding User Roles".

Content: This section defines the purpose of different roles. It specifies that the default role is for authenticated users

the initial role is for unauthenticated users (e.g.

captive portal)

and the AAA Down role (critical role) is for when the authentication server is unavailable. This confirms that none of these roles apply to a client that actively fails an 802.1X authentication attempt.

2. HPE Aruba Networking Documentation

ArubaOS 8.10.0.0 User Guide

Reference: Chapter "Configuring Authentication Servers"

Section "RADIUS Servers".

Content: This section describes the RADIUS protocol flow. It details that an "Access-Reject" packet from the RADIUS server to the Network Access Server (the AP) indicates that the user is not authenticated or authorized. The standard behavior for the NAS upon receiving an Access-Reject is to deny the client access to the network

which means terminating the connection attempt.