Pass the HP Aruba Certified Professional - Campus Access HPE7-A06 Questions and answers with ValidTests

The exhibit shows the output of show vsx status on sw-agg1. Key information includes:

Config Sync Status : sw_image_version_mismatch_error  

NAE : sw_image_version_mismatch_error  

HTTPS Server : sw_image_version_mismatch_error  

Primary Software Version: GL.10.09.0010  

Secondary Software Version: GL.10.11.1021  

These errors clearly indicate that the primary and secondary VSX switches are running different AOS-CX software versions. For VSX to operate correctly, including configuration synchronization and enabling features like MC-LAG interfaces, both switches in the pairmustrun the exact same software version.

Analysis of Options:

A: vsx-software-upgrade is used for upgrades but doesn't resolve the current mismatch requirement.

B: NAE errors are a symptom of the underlying version mismatch.

C: Using the same CX OS version on both primary and secondary switches is the fundamental requirement to clear the mismatch errors and achieve a stable VSX operational state.

D: While ServiceOS is part of the system, the primary requirement and error message relate to the main AOS-CX software version.

The scenario involves a VSX pair (AGG-SW1/SW2) connected upstream to routers R1/R2. The goal is to configure the SVIs on the VSX switches facing these upstream routers optimally to avoid suboptimal L3 paths and unnecessary traffic over the VSX Inter-Switch Link (ISL).

VSX L3 Interface Options:

Active Gateway:Primarily designed for downstream SVIs to provide a redundant default gateway to clients/access switches. Not typically used for upstream routed interfaces.

Active Forwarding:Specifically designed for upstream routed interfaces (physical or SVIs) on a VSX pair. It allows both VSX members to actively route traffic arriving on that interface locally, without needing to forward L3 traffic across the ISL. This ensures optimal routing and utilizes both members effectively.

Unicast IP (Standard IP):Without specific VSX features, standard routing applies. This could lead to suboptimal paths if, for example, return traffic prefers one VSX switch, but the optimal path requires crossing the ISL.

VRRP:Can be run between VSX members but adds complexity and is generally superseded by Active Gateway (downstream) or Active Forwarding (upstream) in VSX designs.

Analysis of Options:

A. Configure active-forwarding: This enables local L3 forwarding on both VSX members for the upstream SVI, preventing unnecessary ISL traversal for routed traffic. This is the recommended best practice.

B. Configure unicast IP: Standard configuration, potentially leading to suboptimal paths/ISL usage.

C. Configure VRRP virtual-ip: Not the recommended approach for upstream links in VSX.

D. Configure active-gateway: Incorrect, Active Gateway is for downstream SVIs.

Conclusion:Using active-forwarding on the SVIs facing the upstream routers (R1/R2) is the HPE Aruba Networking recommended solution to ensure optimal routing and minimize L3 traffic across the ISL.

The question involves configuring an OSPF virtual link to extend area 0 across a non-backbone area, based on an exhibit (not provided) and four configuration options (A to D). Since the exhibit is unavailable, I will assume a typical scenario where a virtual link is needed to connect two area 0 segments through a transit area (e.g., area 1).

Analysis of Options (Assumed Context):A virtual link is configured using the area virtual-link command in the OSPF process. The correct option likely includes:

Option A:Incorrect syntax or incorrect router ID/area for the virtual link.

Option B:Incorrect configuration, possibly missing the virtual link or using wrong parameters.

Option C:Correct. Likely includes the proper command, e.g., area 1 virtual-link 2.2.2.2, where area 1 is the transit area and 2.2.2.2 is the router ID of the remote ABR.

Option D:Incorrect, possibly configuring an unnecessary or incorrect virtual link.

Why Option C is Correct:OSPF requires all areas to connect to the backbone area (area 0). If two area 0 segments are separated by a non-backbone area (e.g., area 1), a virtual link is configured between the Area Border Routers (ABRs) to logically extend area 0 through the transit area. The command area virtual-link is used, specifying the transit area and the router ID of the remote ABR. Option C is assumed to provide the correct syntax and parameters based on standard OSPF virtual link configurations, ensuring area 0 connectivity and proper route advertisement.

Relevance to Certification Objectives:

Routing (16%):Designing and troubleshooting OSPF topologies, including virtual links.

Troubleshooting (10%):Resolving OSPF area connectivity issues.

The goal is to make the adjacent router prefer routes exported by AGG-SW2 over AGG-SW1 for iBGP and eBGP routes to AS65000. Both switches use a route-map BGP-EXPORT with an ip-prefix list local-export. BGP path selection uses attributes like local preference, AS path length, and metric to determine the preferred route.

Analysis of Options:

Option A:Setting local-preference 200 affects iBGP route selection within the same AS but has no impact on eBGP peers (external AS65000), as local preference is not advertised externally.

Option B:Prepending the AS path with 65345 65345 65345 65345 increases the AS path length for routes exported by AGG-SW1, making them less preferred by the adjacent router (both iBGP and eBGP peers) compared to AGG-SW2’s routes, which have a shorter AS path.

Option C:Setting metric 200 affects the MED (Multi-Exit Discriminator), which is used for eBGP route selection within the same AS but is less influential than AS path length and not applicable for iBGP.

Option D:Incorrect syntax (set as-path without prepend) and does not achieve the desired effect.

Why Option B is Correct:BGP route selection prioritizes the shortest AS path for both iBGP and eBGP. By prepending AS 65345 multiple times to AGG-SW1’s exported routes, AGG-SW1’s routes appear less attractive due to a longer AS path, causing the adjacent router to prefer AGG-SW2’s routes. This is a standard BGP traffic engineering technique.

Relevance to Certification Objectives:

Routing (16%):Involves designing and troubleshooting BGP routing topologies, including manipulating path attributes like AS path.

Troubleshooting (10%):Includes remediating BGP routing issues by adjusting route-maps.

To enable DHCP Endpoint Profiling, the switch needs to forward relevant DHCP packets from the client to the ClearPass server. The most common method is configuring the switch to act as a DHCP relay agent for the ClearPass server IP address on the client VLAN's Switched Virtual Interface (SVI).

In scenarios where port access control (like 802.1X or MAC Auth) is enabled, clients might need to send DHCP requestsbeforethey are fully authenticated. To allow this while maintaining security, a pre-authentication role with limited access (specifically allowing DHCP) can be applied to the port initially.

The logical sequence based on the provided steps, assuming a pre-authentication workflow is intended, is:

Create the role:Define the pre-authentication role container and associate it with the appropriate initial VLAN if needed.

Permit DHCP in the role:Apply an Access Control List (ACL) or policy to this role that permits the necessary DHCP traffic (UDP ports 67 and 68). The step provided only mentions UDP 67, which allows the client's initial Discover/Request packets towards the server/relay. (A complete solution requires allowing return traffic on UDP 68 as well).

Apply the role:Configure the client-facing physical interface to use this pre-authentication role before the final role is assigned post-authentication.

Configure DHCP Relay:Configure the ip helper-address command on the client's VLAN SVI. This instructs the switch to forward the DHCP packets it receives from clients in that VLAN to the ClearPass server (in addition to forwarding them to the actual DHCP server). ClearPass receives these packets and extracts information for profiling.

This sequence ensures that even before full authentication, DHCP is permitted, and the necessary packets are relayed to ClearPass for profiling.

The requirement is to prevent loops on Edge-1 switch ports connected to third-party CCTV switches that donotsupport STP. The solution must also include an automatic recovery feature if a port gets disabled.

Loop Prevention without STP:When connecting to non-STP devices, standard STP loop prevention (like BPDU Guard) might not work if the connected device doesn't send BPDUs. AOS-CX offers a feature called loop-protect which sends probes to detect loops in non-STP environments.

Automatic Recovery:Features that disable ports (like BPDU Guard or Loop Protect) often have a timeout or auto-recovery option (port-disable-timer for Loop Protect) allowing the port to automatically re-enable after a configured period.

Analysis of Options:

A: LACP fallback applies to LAGs, not general loop prevention.

B: TCN-guard is an STP feature, irrelevant here.

C: Suggests spanning-tree with bpdu-guard timeout. BPDU Guard detects loops by listening for BPDUs, which these CCTV switches don't send. However, the timeout featuredoesprovide the required automatic recovery mechanism if the portweredisabled by BPDU Guard.

D: UDLD detects unidirectional links, not typically bridging loops caused by topology.

Re-evaluation:The ideal AOS-CX feature is loop-protect with port-disable-timer. Since this isn't explicitly an option, we must evaluate the given choices. Option C is theonlyone that mentions a mechanism (bpdu-guard timeout) providing automatic recovery from a disabled state. While BPDU Guard isn't the right detection mechanism here, it's the closest fit regarding the auto-recoveryrequirement. It's possible the question implicitly assumes some stray BPDUs might trigger it or that it's the intended "best fit" answer despite the detection mechanism mismatch.

Conclusion:Given the options, Option C is the most plausible because it includes the timeout feature associated with bpdu-guard, fulfilling the automatic recovery requirement, even though BPDU guard itself is not the ideal detection method for loops involving non-STP devices.

The BGP state on a VSX pair is stuck (not 'Established') after a recent firewall change at the WAN/Internet edge, where the BGP peering likely occurs.

BGP and Firewalls:BGP establishes sessions usingTCP port 179. Firewalls located between BGP peers must explicitly permit TCP port 179 traffic bidirectionally for the peering to establish and maintain. Firewall changes are a frequent cause of broken BGP sessions.

Troubleshooting Steps After Firewall Change:The most logical first step is to verify that the firewall change did not inadvertently block TCP port 179 between the configured BGP neighbor IP addresses.

Analysis of Options:

A: Restarting routing service is disruptive and not the first step.

B: Confirming that appropriate TCP ports (specifically 179) are still allowed through the firewall directly addresses the most probable cause related to the firewall change event.

C: Restarting NAT service is likely irrelevant unless NAT is incorrectly configured for BGP peers.

D: Confirming the peer AS is a basic configuration check but less likely related to thefirewall changeevent than port blocking.

Conclusion:Given the problem occurred immediately following a firewall change, verifying that the firewall still permits TCP port 179 between the BGP peers is the most direct and likely troubleshooting step.

The issue involves users roaming to APs connected to a test switch failing to receive an IP address on the corporate Wi-Fi network (bridged mode), with ClearPass reporting a RADIUS Aruba-User-Role attribute of Access_Point. The goal is to identify the configuration change needed to resolve this issue.

Analysis of Options:

Option A (port-access client-move enable):Enables client movement between ports but does not address the AP authentication issue.

Option B (aaa authentication port-access client-limit 0):Correct. Setting the client limit to 0 on the switch ports (1/1/1–1/1/48) disables MAC authentication for APs, allowing them to be treated as trusted devices and preventing the application of an incorrect role.

Option C (port-access onboarding-method concurrent enable):Enables concurrent onboarding but is unrelated to the AP role issue.

Option D (port-access role Access_point auth-mode device-mode):Configures a device mode role but does not resolve the IP assignment issue caused by incorrect authentication.

Why Option B is Correct:The issue arises because the switch is applying 802.1X or MAC authentication to the AP ports, resulting in ClearPass assigning the Access_Point role, which restricts client connectivity. By setting aaa authentication port-access client-limit 0 on the AP-connected ports (1/1/1–1/1/48), the switch disables port-access authentication for these ports, treating the APs as trusted devices. This allows clients to authenticate properly via the AP and receive IP addresses in bridged mode, resolving the issue.

Relevance to Certification Objectives:

WLAN (9%):Involves troubleshooting wireless functions and Layer 2 issues related to AP connectivity.

Authentication/Authorization (9%):Includes troubleshooting ClearPass integration and 802.1X configurations.

Security (10%):Covers troubleshooting wired 802.1X implementations.

The issue involves a new access switch’s port being automatically disabled when connected to an aggregation switch, likely due to a Spanning Tree Protocol (STP) protection mechanism.

Analysis of Options:

Option A (Disable bpdu-filter):BPDU filtering prevents BPDUs from being sent or processed, which could cause loops, not resolve the issue.

Option B (Disable root-guard):Root guard prevents a port from becoming the root bridge but does not cause port disablement in this context.

Option C (Disable loop-guard):Loop guard prevents alternate ports from becoming designated but is unrelated to port disablement.

Option D:Correct. Disabling BPDU guard on the aggregation switch’s interface prevents it from disabling the port when it receives BPDUs from the new access switch.

Why Option D is Correct:BPDU guard is an STP feature that disables a port if it receives BPDUs, assuming an unauthorized device is connected. When a new access switch isconnected, it sends BPDUs as part of normal STP operation, triggering BPDU guard on the aggregation switch and disabling the port. Disabling BPDU guard on the aggregation switch’s interface (e.g., no spanning-tree bpdu-guard) allows the access switch to participate in STP without being disabled, resolving the issue while maintaining network stability.

Relevance to Certification Objectives:

Network Resiliency and Virtualization (8%):Involves troubleshooting STP mechanisms for fault tolerance.

Troubleshooting (10%):Includes diagnosing and remediating STP-related issues in campus networks.

Switching (19%):Covers Layer 2 technologies like STP and its protection features.

An NAE (Network Analytics Engine) Python script designed to monitor links and update descriptions isn't storing data as planned. We need the first things to check (select three).

NAE Components & Troubleshooting:NAE involves Agents running Scripts, often triggered by Monitors observing system state (like interface status or LLDP changes). Failures can occur in any component or due to resource issues.

Initial Checks:

Script (script usage - C):Check the script itself for syntax errors, logic flaws, status, and logs (show nae script [status|log]). Ensure it's uploaded correctly and enabled.

Agent (Agent usage - B):Check the agent configured to run the script. Is it running? Are its parameters correct? Are there errors associated with the agent? (show nae agent [status|detail]). Check agent resource limits.

Monitor (monitor usage - E):If the script relies on a monitor to trigger or gather data, check the monitor's status, configuration, and associated conditions (show nae monitor [status|detail]). Is the monitor detecting the intended events?

Resources (Processor/Memory/Flash - D, F, A):General switch health is important. High CPU (D) or memory (F) usage could prevent the script/agent from running correctly. If the script is supposed to store datapersistently (e.g., write to a file or NAE database), check flash memory usage (A) or NAE database limits.

Conclusion:When troubleshooting NAE, the core components to check first are the Script itself (C), the Agent running it (B), and any Monitors it depends on (E). These cover the specific NAE elements involved. General system resources (D, F, A) are secondary checks if the core components appear configured correctly but still fail.