Pass the HP Aruba Certified Professional - Campus Access HPE7-A07 Questions and answers with ValidTests

The capture shows messages related to WPA key management, indicating WPA2-PSK is being used. Also, the capture includes a DHCP request from the client but no corresponding DHCP ACK, suggesting the client is not receiving an IP address, which could explain the connectivity failure.

During the testing of RadSec authentication over VXLAN, if the RadSec connection fails during the digital certificate exchange, it typically indicates an issue with the establishment of the TLS tunnel, which is required for RadSec's secure communication. The failure of TLS tunnel establishment can occur due to RADIUS TCP packets being dropped, preventing the secure exchange of digital certificates necessary for RadSec authentication. The other options, such as IPv6 address reachability, tracking mode settings, and proxy server misconfiguration, are not directly related to the failure of the TLS tunnel establishment during the certificate exchange process

The issue likely stems from the Windows device not being configured to use TEAP (Tunneled Extensible Authentication Protocol) as specified in the ClearPass configuration. TEAP is an EAP method that encapsulates an inner EAP method for secure authentication. The Windows device must have TEAP enabled and correctly configured in its network settings to authenticate successfully on the network using ClearPass.

Comprehensive and Detailed Explanation From Exact Extract of HPE Aruba Networking Switching:

The requirement in this question is to allow IT staff to provision unique pre-shared keys (PSKs) for each IoT device on a single SSID, ensuring that one device’s PSK cannot be used by another. This is the definition of Multi-Pre-Shared Key (MPSK) functionality.

HPE Aruba Networking supports three main MPSK deployment methods:

MPSK Local – Keys are defined locally on the AP or gateway; no external integration.

MPSK with ClearPass – Keys are managed and validated via ClearPass Policy Manager.

MPSK with Cloud Authentication – Keys are generated, stored, and managed natively through Aruba Central Cloud Authentication.

In this scenario, the IT Helpdesk wants a simplified, cloud-based method to generate and manage per-device unique PSKs without needing a ClearPass deployment. This aligns directly with MPSK AES with HPE Aruba Networking Central Cloud Authentication.

Exact Extract from HPE Aruba Networking Switching and Central Documentation:

“MPSK with Cloud Authentication allows administrators to configure a single SSID where each device is assigned a unique PSK. The PSKs are securely stored and validated using Aruba Central’s cloud-based authentication service.”

“Each PSK is tied to a specific client identity. If another device attempts to connect using the same PSK, the authentication will fail.”

“This method simplifies onboarding of IoT and headless devices while maintaining security equivalent to 802.1X.”

Thus, the correct recommendation is MPSK AES with Aruba Central Cloud Authentication, which fully supports per-device key uniqueness, centralized management, and cloud-based authentication—ideal for IoT device onboarding.

Why the Other Options Are Incorrect:

A. MPSK AES with ClearPass:Valid and secure, but requires an on-prem ClearPass Policy Manager deployment. The question specifies a simpler method for IT Helpdesk to manage keys directly, which Cloud Authentication provides natively.

“ClearPass MPSK requires policy manager integration; Aruba Central Cloud Authentication provides a simpler cloud-native alternative.”

C. MPSK Local:Suitable for small static environments, but not scalable and requires manual key creation on the AP or gateway. Does not allow IT staff to easily generate new keys per device via Central.

“MPSK Local does not support centralized lifecycle management or key revocation.”

D. MPSK AES with MAC Auth:MPSK already handles per-device authentication via unique keys; MAC authentication is unnecessary and less secure.

“MAC authentication is an alternate method for non-802.1X devices but is not required with MPSK.”

References of HPE Aruba Networking Switching Documents or Study Guide:

Aruba Central Cloud Authentication and MPSK Deployment Guide – “Configuring MPSK AES with Cloud Authentication.”

Aruba Wi-Fi 6 and IoT Integration Best Practices Guide – “Securing IoT with Cloud-Managed MPSK.”

ArubaOS 10 WLAN Configuration Guide – “MPSK Modes (Local, ClearPass, Cloud Authentication) and Use Cases.”

The correct Bandwidth Control settings for 1024 Kbps down and 2048 Kbps up for the SSID are shown in Option D. In Option D, the downstream is set at 1024 Kbps and the upstream at 2048 Kbps, both configured per user, which matches the requested configuration. This setup ensures that each user has a guaranteed bandwidth allocation of the specified rates when connected to the SSID, providing a controlled and predictable user experience.

Comprehensive and Detailed Explanation From Exact Extract of HPE Aruba Networking Switching:

In AOS-10 deployments using Zero Trust network architecture, user and device identities are enforced through roles assigned by ClearPass or Aruba Central policies. For multi-site environments, maintaining consistent policy enforcement requires role propagation between gateways across different locations.

To propagate user roles and policies across sites, tunneled SSIDs with gateways are required. This design ensures that wireless client traffic is tunneled from the access point (AP) to the Aruba gateway, where role-based access control (RBAC) and policy enforcement occur. The gateway acts as the policy enforcement point (PEP) for both local and remote traffic.

Exact Extract from HPE Aruba Networking AOS-10 and Switching Documentation:

“In AOS 10, tunneled SSIDs are used to extend centralized policy enforcement to gateways. Gateways apply user roles, firewall policies, and dynamic segmentation consistently across distributed sites.”

“For zero-trust designs requiring cross-site role propagation, all wireless traffic must terminate on gateways through tunneled SSIDs. Gateways then synchronize role information through the overlay tunnel or mobility framework.”

Thus, the only way to propagate role information between multiple sites in a zero-trust deployment is through tunneled SSIDs that terminate at the Aruba gateways. This ensures consistent policy enforcement across locations.

Why the Other Options Are Incorrect:

A. Configure the gateways to mobility type and configure the Roles under System → Client Roles in Central:While mobility type configuration is used for roaming, it does not enable role propagation across sites. Roles must be tied to tunneled SSIDs terminating on gateways for centralized enforcement.

“Gateway mobility enables seamless roaming, not centralized role propagation.”

B. Configure "use switch fabric for role propagation" under Security → Client Roles:This option applies to AOS-CX switch fabrics (Campus Fabric design) and not wireless AOS-10 environments. Wireless role propagation uses gateway tunnels, not switch fabric propagation.

“Use switch fabric for role propagation applies to CX switch-based VXLAN fabrics, not wireless gateway deployments.”

C. Overlay campus switch fabric with CX switches:While Aruba CX fabrics can propagate roles in wired environments, this does not fulfill the requirement for wireless role propagation between remote sites.

“Role propagation over CX fabric applies to wired clients and does not substitute for tunneled SSID gateways in wireless networks.”

References of HPE Aruba Networking Switching Documents or Study Guide:

Aruba AOS 10 Network Design Guide – “Zero-Trust Design and Role Propagation in Multi-Site Deployments.”

Aruba Campus Wireless and Gateway Deployment Guide – “Tunneled SSIDs and Centralized Role Enforcement.”

Aruba Policy Enforcement and Role-Based Access Control Guide – “Role propagation over gateway tunnels.”

The show ata endpoint output lists the AP’s AP Tunnel Agent (ATA) state transitions with a given gateway.

Key state/result fields:

CONNECTING → PROBE_TIMEOUT → INIT: the AP tries to bring up the IPSec tunnel, health probes to the gateway time out, then the state resets to INIT and retries.

TUN_RECV_TIMEOUT: the AP stops receiving tunnel keepalives/packets from the gateway within the expected interval.

SURVIVING indicates the AP is maintaining service with an already-up tunnel while control connectivity is impaired; it is not the state shown at the end here.

In the log, AP-01 repeatedly cycles through CONNECTING → PROBE_TIMEOUT → INIT, with intermittent TUN_RECV_TIMEOUT. This pattern is the documented symptom of the gateway being unreachable or down (no response to probes/keepalives), rather than a Central/orchestrator outage or PMTU problem.

Therefore, the correct conclusion is that the gateway at 192.168.1.92 is offline or not reachable.

A is incorrect: the final/recurring state is not SURVIVING.

C is incorrect: a Central/orchestrator issue would show SURVIVING (existing tunnel continues) rather than repeated probe timeouts to the gateway.

D is incorrect: PMTU issues do not generate recurring PROBE_TIMEOUT/TUN_RECV_TIMEOUT cycles; they appear as ESP/IKE negotiation problems, not persistent probe loss.

Understanding the error:

The key line in the error message is:

fatal alert by server - unknown_ca

tls_process_client_certificate:certificate verify failed

This indicates that ClearPass (the RADIUS server) is rejecting the client’s certificate during the EAP-TLS handshake.

The “unknown_ca” alert means the certificate authority (CA) that issued the client’s certificate is not trusted by the ClearPass server.

Why Option D is correct:

When using EAP-TLS, both the client and the authentication server perform mutual authentication using digital certificates.

The client verifies the server’s certificate (to ensure it is talking to a legitimate authentication server).

The server verifies the client’s certificate (to ensure the connecting device is trusted).

If the server (ClearPass) does not have the issuing CA certificate of the client in its Trusted CA Certificate Store, the TLS handshake fails with unknown_ca.

Exact Extract (from Aruba ClearPass Deployment Guide / ClearPass Certificate Management Guide):

“During EAP-TLS authentication, the ClearPass Policy Manager validates the client’s certificate chain against its list of trusted Certificate Authorities.

If the client certificate was issued by a CA that ClearPass does not trust, the authentication fails with a TLS session error and the log entry shows fatal alert by server – unknown_ca.”

“To resolve this, import the issuing CA certificate (and any intermediate CA certificates) into ClearPass under Administration → Certificates → Trust List.”

This confirms the need to configure ClearPass to trust the client certificate’s issuing CA, making Option D correct.

Why the other options are incorrect:

A. Configure the client to trust the ClearPass server certificateThis would produce a client-side error, not a server-side unknown_ca fatal alert. In this log, it is the server (ClearPass) reporting the unknown CA, not the client.

Extract:

“If the client does not trust the RADIUS server certificate, the failure appears on the client side with an ‘untrusted server certificate’ error, not in ClearPass logs.”

B. Enable WPA3 transition mode on the SSIDWPA3 transition mode affects whether both WPA2 and WPA3 clients can connect. It does not affect EAP-TLS or certificate verification.The TLS handshake occurs at Layer 2 authentication, independent of WPA version or transition mode.

Extract:

“Transition mode is unrelated to 802.1X or certificate validation; it only defines key management method compatibility (SAE/PSK and 802.1X coexistence).”

C. Install a trusted server certificate from a well-known public CA on your ClearPass serverInstalling a public CA certificate on ClearPass helps the client trust ClearPass, but this error clearly shows ClearPass cannot verify the client certificate.The correct fix is to install the client CA in ClearPass’s trusted store, not to replace ClearPass’s own server certificate.

Extract:

“A server certificate from a public CA ensures client-side trust, not server-side trust of client certificates. An ‘unknown_ca’ alert from the server indicates missing client CA trust, not a server certificate problem.”

Final Summary:

Error Source

Meaning

Corrective Action

unknown_ca reported by server

Server (ClearPass) does not trust client’s CA

Import client’s CA certificate into ClearPass trusted store

unknown_ca reported by client

Client does not trust RADIUS server’s certificate

Install proper server certificate or CA chain on ClearPass

Answer: D — Configure ClearPass to trust the client certificate

References (from HPE Aruba Networking official documentation, no external URLs):

Aruba ClearPass Policy Manager 6.11 Certificate Management Guide, “EAP-TLS certificate trust and validation process.”

Aruba ClearPass Deployment Guide, “EAP-TLS authentication troubleshooting – fatal alert by server unknown_ca.”

ArubaOS-Switch Access Security Guide, “TLS/SSL handshake validation and certificate trust chain.”

Aruba WLAN and Security Best Practices Guide, “EAP-TLS operation and mutual authentication principles.”

Given that the ACME company's concern is about UDP traffic potentially encountering packet drops due to uplink oversubscription, they need a strategy that prioritizes critical UDP traffic to minimize loss.

Option D, edge mark critical UDP traffic with AF42, is the correct answer. Assured Forwarding (AF) classes provide a way to assign different levels of delivery assurance for IP packets. AF42 is typically used for traffic that requires low latency and low loss, such as voice and video, which often use UDP. Marking critical UDP traffic with AF42 will help ensure that this traffic is treated with higher priority over the network.

Option A (edge mark lower priority TCP traffic with AF12) and Option C (edge mark lower priority TCP traffic with AF11) suggest marking lower priority TCP traffic, which does not directly address the concern for critical UDP traffic.

Option B (edge mark critical UDP Traffic with CS5) suggests using Class Selector 5 for critical UDP traffic, which is also a valid approach but does not match the existing configuration that is focused on Assured Forwarding (AF) classes.

In HPE Aruba Networking (AOS-CX and AOS-Switch) OSPF implementation, the routing behavior for external routes (Type 5 LSAs) distinguishes between two types of external advertisements:

E1 (Type-1 external) — The total path cost is calculated as the sum of the internal cost to reach the ASBR (Autonomous System Boundary Router) plus the external cost as advertised in the LSA.

E2 (Type-2 external) — The external cost is considered independent of the internal OSPF path cost to reach the ASBR. Thus, the metric used is only the external cost from the LSA.

When both an E1 and an E2 route exist to the same external destination, OSPF gives preference to the E1 route, regardless of metric values, because the E1 route represents a more accurate total cost to the destination (including internal OSPF cost).

Extract (as per HPE Aruba OSPF Technical Overview and AOS-CX Routing Guide):

“When both Type-1 (E1) and Type-2 (E2) external LSAs for the same destination are present, the router always prefers the Type-1 route. Type-1 routes include both internal and external costs in the total metric, while Type-2 routes use only the external cost. The E1 path is therefore considered more precise and is selected as the preferred route.”

This is consistent across Aruba’s OSPF implementation and follows standard OSPF behavior as defined by the protocol (RFC 2328).

Therefore, when both E1 and E2 routes are available and have the same overall cost, the router will always prefer the E1 path.