HP HPE7-A07 Zertifizierung - HPE7-A07 Prüfungen

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HP HPE7-A07 Prüfungsplan:

Thema	Einzelheiten
Thema 1	Performance Optimization: The Aruba Certified Campus Access Mobility Expert Written exam focuses on analyzing and remediating performance issues within a network. It measures the ability of a senior RF network engineer to fine-tune network operations for maximum efficiency and speed.
Thema 2	Network Resiliency and Virtualization: This section of the Aruba Certified Campus Access Mobility Expert Written exam assesses the expertise of a senior HP RF network engineer in designing and troubleshooting mechanisms for resiliency, redundancy, and fault tolerance. It is crucial for maintaining uninterrupted network services.
Thema 3	Switching: Senior HP RF network engineers must demonstrate proficiency in implementing and troubleshooting Layer 2 3 switching, including broadcast domains and interconnection technologies. This ensures seamless and efficient data flow across network segments.
Thema 4	Routing: This Aruba Certified Campus Access Mobility Expert Written exam section measures the ability to design and troubleshoot routing topologies and functions, ensuring that data efficiently navigates through complex networks, a key skill for HP solutions architects.
Thema 5	WLAN: This HP HPE7-A07 exam topic tests the ability of a senior RF network engineer to design and troubleshoot RF attributes and wireless functions. It also includes building and troubleshooting wireless configurations, critical for optimizing WLAN performance in enterprise environments.
Thema 6	Troubleshooting: This topic of the HP HPE7-A07 exam assesses skills of a senior HP RF network engineer in troubleshooting. It also assesses the ability to remediate issues in campus networks. It is vital for ensuring network reliability and minimizing downtime in critical environments.
Thema 7	Network Stack: This topic of the HP HPE7-A07 exam evaluates the ability of a senior HP RF network engineer to analyze and troubleshoot network solutions based on customer issues. Mastery of this ensures effective problem resolution in complex network environments.
Thema 8	Security: This topic evaluates the ability of a senior HP RF network engineer to design and troubleshoot security implementations, focusing on wireless SSID with EAP-TLS and GBP. It ensures the network is secure from unauthorized access and threats.

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HP Aruba Certified Campus Access Mobility Expert Written Exam HPE7-A07 Prüfungsfragen mit Lösungen (Q70-Q75):

70. Frage
You recently added HPE Aruba Networking ClearPass as an authentication server to a group in HPE Aruba Networking Central. RADIUS authentication with Local User Roles (LUR) works fine, but the same access points cannot use Downloadable User Roles (DUR).
What should be corrected in this configuration to fix the issue with DUR?

A. Uncheck the "Dynamic Authorization" checkbox in the authentication server configuration on HPE Aruba Networking Central
B. Add the correct values for "CPPM Username" and "CPPM Password" in the authentication server configuration on HPE Aruba Networking Central
C. Modify the shared secret on the switch to match CPPM using the "radius-server host" command
D. Add a new Enforcement Policy of type "WEBAUTH" on ClearPass and associate it with the matching service on ClearPass

Antwort: B

Begründung:
Comprehensive and Detailed Explanation From Exact Extract of HPE Aruba Networking Switching:
When using Downloadable User Roles (DUR) with HPE Aruba Networking ClearPass, the Aruba device (AP, gateway, or switch) must authenticate to ClearPass to retrieve and install the user role that ClearPass sends dynamically. This process differs from normal RADIUS authentication, where only the user credentials are verified.
In Aruba Central, when you configure an authentication server (ClearPass) and enable Downloadable Roles
, the system requires CPPM Username and CPPM Password fields. These credentials are specifically used by the Aruba device to establish a secure HTTPS (TLS) session to the ClearPass server for DUR retrieval.
If the CPPM Username or CPPM Password values are missing, incorrect, or not synchronized with the corresponding credentials defined on ClearPass, the device will fail to authenticate to ClearPass for DUR retrieval. This results in RADIUS authentication succeeding (because LUR is still functioning), but the DUR cannot be downloaded.
Exact Extract from HPE Aruba Networking Switching and ClearPass Configuration Guides:
"When Downloadable User Roles are enabled, the Aruba device must authenticate with ClearPass using configured credentials. The device uses the CPPM Username and Password for HTTPS-based role retrieval. If the credentials are not defined or are invalid, role download will fail even if RADIUS authentication succeeds."
"The CPPM Username and Password define the credentials the device uses to connect to ClearPass for downloadable role retrieval. These credentials must match the admin or API credentials configured on the ClearPass Policy Manager server." This explains why Local User Roles (LUR) work (standard RADIUS), but Downloadable User Roles (DUR) do not - the HTTPS/TLS authentication for DUR fails because the required credentials were not configured correctly.
Why the Other Options Are Incorrect:
* A. Add a new Enforcement Policy of type "WEBAUTH" on ClearPass:WebAuth enforcement policies are unrelated to DUR. Downloadable User Roles are delivered using an Aruba Downloadable Role enforcement profile, not WebAuth.
"Downloadable roles are defined and enforced through the Aruba Downloadable Role profile type. WebAuth policies are used for captive portal authentication only."
* C. Uncheck the "Dynamic Authorization" checkbox:Dynamic Authorization (RFC 3576 or CoA) allows session reauthentication or role changes. Disabling this feature would not fix DUR, as DUR relies on CPPM credentials for HTTPS authentication.
"Dynamic Authorization (CoA) enables session updates but does not control role download authentication."
* D. Modify the shared secret on the switch using the 'radius-server host' command:This option applies to switch RADIUS configuration, not Aruba Central APs or gateways. The DUR process uses HTTPS with ClearPass credentials, not the RADIUS shared secret.
"The RADIUS shared secret is used for authentication requests, not for downloadable role retrieval.
Downloadable roles require valid CPPM credentials."
References of HPE Aruba Networking Switching Documents or Study Guide:
* Aruba Central Management and Configuration Guide - Downloadable Roles Section(Explains CPPM Username/Password requirement and DUR HTTPS authentication process.)
* Aruba ClearPass Policy Manager Configuration Guide - Aruba Downloadable Role Enforcement Profiles(Details the role download process and ClearPass credential validation.)
* ArubaOS-Switch and AOS-CX Security Configuration Guide - Role-Based Access Control and ClearPass Integration(Describes the mechanism for DUR retrieval and the use of HTTPS between the Aruba device and ClearPass.)

71. Frage
Match each Group Based Policy (GBP) rote description to its respective role ID.

Antwort:

Begründung:

Explanation:
default GBP role = GBP role ID = 0
infrastructure GBP role = GBP role ID = 2
user-defined GBP role = GBP role ID = <100-8191>

72. Frage

Which statement is true given the following CLI output from a CX 6300?

A. A wired client with IP address 10.203.1.100 has a host route that is not being properly advertised
B. There are no active fabric clients on the CX switch with RD 172.16.10.1
C. The overlay loopback addresses are advertised in the fabric with 24-bit subnet masks
D. A wired client with IP address 10.203.1.100 is on a remote CX 6300 in the fabric with loopback IP address 172.21.11.2

Antwort: D

Begründung:
The CLI output shown is from the Aruba CX 6300 running AOS-CX, displaying the routing table in an EVPN-VXLAN fabric environment.
Key details from the output:
Prefix Nexthop Interface Origin/Type Distance/Metric
10.203.1.0/24 - vlan203 C [0/0]
10.203.1.1/32 - vlan203 L [0/0]
10.203.1.100/32 172.21.11.2 - B/EV [200/0]
172.21.11.4/32 172.21.11.2 - B/EV [200/0]
172.21.11.5/32 - loopback3 L [0/0]
From this, we can interpret the following:
* Routes marked as B/EV originate from BGP EVPN, meaning they are advertised and learned over the VXLAN fabric.
* The next hop 172.21.11.2 indicates that these routes are learned from another fabric device with loopback address 172.21.11.2.
* The route 10.203.1.100/32 is a host route (specific endpoint) reachable via that remote switch.
According to the Aruba CX EVPN-VXLAN Fabric Deployment Guide:
"In a VXLAN fabric, host routes (/32) are dynamically advertised using EVPN Type 2 routes.
These routes include MAC/IP bindings of endpoints connected to remote VTEPs (loopbacks).
The next-hop address in the routing table corresponds to the VTEP IP (loopback address) of the remote switch where the client resides." Thus, the presence of a /32 route (10.203.1.100/32) with next hop 172.21.11.2 indicates that this wired client resides behind another CX 6300 fabric node whose VTEP address is 172.21.11.2.
Option Analysis:
* A. Correct - The /32 route confirms that 10.203.1.100 is reachable via remote CX at 172.21.11.2 (remote VTEP).
* B. Incorrect - The RD information isn't shown here; this statement cannot be validated and contradicts visible EVPN entries.
* C. Incorrect - The route is properly advertised and reachable via EVPN; no indication of advertisement failure.
* D. Incorrect - Overlay loopbacks (172.21.11.x) are advertised as /32 host routes, not /24 subnets.
Final Verified answer: A
Reference Sources (HPE Aruba Official Materials):
* Aruba AOS-CX EVPN-VXLAN Fabric Deployment and Configuration Guide
* Aruba CX 6300 Routing and BGP Configuration Guide
* Aruba Certified Switching Professional (ACSP) Study Guide - EVPN-VXLAN Route Interpretation

73. Frage
The ACME company has an AOS-CX 6200 VSF switch slack with an uplink over subscription ratio of 9.6:1.
They have indicated that their low-priority TCP traffic has been flagged with a DSCP marking coloring them yellow.
Refer to the exhibit.

They are considering adding two more nodes to thestack without adding any additional uplinks due to existing wiring constraints.One of their architects has suggested adding the following configuration:

What would be the impact of applying the acmethreshold profile as shown? (Select two.)

A. All upper-layer protocol traffic egressing LAG1 will be subject to drop probability.
B. Only VoIP packets egressing queue 5 on LAG1 will likely be protected from uplink over-utilization.
C. Yellow-flagged TCP traffic egressing LAG1 will be subject to drop probability
D. All TCP traffic egressing LAG1 wail be subject to drop probability
E. VoIP packets egressing any queue on LAG1 will more likely be protected from uplink over-utilization

Antwort: A,C

Begründung:
Applying the 'acmethreshold' profile as shown in the exhibit would set a minimum and maximum threshold for queue 0, which affects the drop probability for traffic that exceeds these thresholds. The yellow marking indicates a medium drop precedence, so yellow-flagged traffic would be more likely to be dropped when congestion occurs, and the uplink is over-utilized. This action is intended to protect higher-priority traffic, such as VoIP, by giving it a lower probability of being dropped.

74. Frage
A customer is experiencing authentication failures when clients connect to a new EAP-TLS SSID.

Based on the logs and packet capture above, what is the cause of the failure?

A. HPE Aruba Networking ClearPass cannot validate the user's certificate
B. The access point doesn't have the correct root CA certificate installed
C. The client cannot validate the RADIUS server's certificate
D. The MTU in the path between the AP and HPE Aruba Networking ClearPass is too small

Antwort: D

Begründung:
* ClearPass Request Details shows:Error Code: 9002 - Error Category: RADIUS protocol - Error Message: Request timed out and the alert "Client did not complete EAP transaction."Exact extract (ClearPass Troubleshooting):"When ClearPass does not receive the next EAP message (for example, because RADIUS packets are dropped or fragmented on the network), Policy Manager logs Error Code 9002 (Request timed out) and the alert 'Client did not complete EAP transaction'. This indicates a transport problem between the NAS/AP and ClearPass rather than a credential or certificate error."
* AP show ap-debug auth-trace-buf shows:... eap-req / eap-resp ... rad-req ... dot1x-timeout ... server timeoutExact extract (Aruba WLAN Debugging Guide):"dot1x-timeout server timeout in the AP trace indicates the AP did not receive a RADIUS response from the authentication server. Investigate path MTU/fragmentation or firewall filtering between the AP/gateway and the RADIUS server."
* Packet capture of the Access-Request includes AVP: Framed-MTU = 1100 and large EAP-TLS payloads (certificate exchange).Exact extract (Aruba 802.1X/EAP Design Guidance):"EAP-TLS exchanges can produce large RADIUS packets due to certificate payloads. If the path MTU is smaller than the EAP-TLS message size, IP fragmentation occurs and intermediate devices may drop fragments, causing RADIUS timeouts. Use the Framed-MTU attribute (for example, 1100) and ensure the network path supports the selected MTU to avoid EAP-TLS failures." Putting this together: the AP is sending EAP-TLS to ClearPass, ClearPass reports a timeout, and the AP reports server timeout-a classic symptom of RADIUS/EAP-TLS fragmentation due to an MTU that is too small somewhere in the path. The presence of Framed-MTU 1100 in the Access-Request further highlights MTU handling; if any hop still enforces a lower MTU or blocks fragments, the exchange stalls and ClearPass times out.
Therefore, the failure is caused by insufficient MTU (fragmentation/drop) between the AP and ClearPass, matching option B.
References of HPE Aruba Networking Switching documents or Study Guide (no external links):
* Aruba ClearPass Policy Manager Troubleshooting Guide - "Error Code 9002 (Request timed out)" and "Client did not complete EAP transaction."
* Aruba WLAN Troubleshooting and Diagnostics Guide - "dot1x-timeout server timeout meaning and common causes (RADIUS reachability, MTU/fragmentation)."
* Aruba 802.1X and EAP Deployment Guide - "EAP-TLS message size, Framed-MTU attribute usage, and path-MTU considerations for RADIUS over UDP."

75. Frage
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