HPE7-A06 HPE Campus Access Switching Expert Written Exam Questions and Answers

The goal is to add a static route on Router-1 to allow clients in VLAN 10 (subnet 10.2.10.0/24, presumably in VRF 'IoT-Medical' based on options) to reach services in the 10.1.100.0/24 subnet. The exhibit indicates interface 1/1/1 (IP 10.255.101.10/24) is in VRF 'service', and the likely next hop towards the destination is Core-1 at 10.255.101.11 (also implied to be reachable via VRF 'service'). This requires adding a route in the source VRF ('IoT-Medical') pointing towards the destination via the next hop in the 'service' VRF.

Static Route Syntax (with VRF): ip route < destination_prefix > < next-hop-ip > [vrf < source-vrf > ]

Analysis of Options:

A: Claims Core-1 isn't in VRF 'service', contradicting the likely setup.

B: Uses unusual interface:ip syntax (1/1/1:10.255.101.11). Defines the route in VRF 'IoT-Medical'.

C: Uses interface 1/1/1 as the next hop. This is less specific than using the IP address and relies on the interface being point-to-point or having proxy ARP enabled. Defines the route in VRF 'IoT-Medical'.

D: ip route 10.1.100.0/24 10.255.101.11 vrf IoT-Medical. This uses the standard syntax to define a static route for the destination 10.1.100.0/24 via the next-hop IP 10.255.101.11 within the context of the IoT-Medical VRF. The successful function of this route depends on inter-VRF routing (route leaking) being configured between 'IoT-Medical' and 'service' VRFs, but the command itself correctly defines the desired static route.

Conclusion: Option D provides the correct and standard command syntax to configure the required static route within the specified source VRF ('IoT-Medical').

The question asks for the effects of adding the command neighbor 10.2.0.3 send-community both to the BGP configuration under the IPv4 address family context for neighbor R2 (10.2.0.3) on router R1.

send-community both: This command instructs R1 to send both standard (RFC 1997) and extended (RFC 4360) BGP community attributes to neighbor R2. By default, communities are not sent.

BGP Capability Negotiation: Adding or changing features like community advertisement modifies the BGP capabilities exchanged between neighbors during session establishment. Any change to these capabilities requires the BGP session to be reset (flap) so that the peers can renegotiate using the new capabilities.

Analysis of Options (Select Two):

A: Correct (partially). It enables R1 to send standard and extended communities. The ability to receive depends on the peer and local config. The capability is negotiated upon session reset.

B: Incorrect. Changing capabilities requires the session to flap; it's not without consequence.

C: Incorrect. It primarily enables outbound sending from R1. Inbound acceptance is implicit if the neighbor is activated.

D: Correct. Modifying BGP neighbor capabilities, such as enabling send-community, necessitates a BGP session reset (flap) for the change to take effect.

E: Incorrect terminology ("import/export", "type-1/type-2 communities").

Conclusion: The command enables R1 to send communities (A describes the purpose/capability), and adding this command to an existing session will cause the session to flap for renegotiation (D describes the immediate consequence).

The question asks for the first step in applying a role-to-role ACL (Access Control List) on traffic from a mobile device (M1) to a role (H2) in a network using Dynamic Segmentation with VXLAN and role-based policies.

Analysis of Options:

Option A: Describes an intermediate step where the edge switch transfers the Group Policy ID over VXLAN, which occurs later in the process.

Option B: Correct. The first step is the AP forwarding the packet from the mobile device (M1) to the gateway, which initiates the traffic flow in a tunneled Dynamic Segmentation setup.

Option C: Describes a later step where the destination switch (A1) enforces the role-to-role ACL, after the packet has traversed the network.

Option D: Describes a step where the gateway forwards traffic over a VXLAN tunnel, which occurs after the AP forwards the packet.

Why Option B is Correct: In HPE Aruba Networking’s Dynamic Segmentation architecture, wireless clients (e.g., M1) connect to an AP, which tunnels traffic to a gateway (e.g., in tunneled mode). The first step in the traffic flow is the AP forwarding the client’s packet to the gateway, which then processes the packet for role assignment and policy enforcement. This aligns with the role-to-role ACL application process, where the gateway applies policies based on the source (M1’s role) and destination (H2’s role) using Group Policy IDs over VXLAN.

Relevance to Certification Objectives:

Security (10%): Involves designing and troubleshooting role-based security policies in customer networks.

WLAN (9%): Includes implementing and troubleshooting wireless traffic flows in Dynamic Segmentation.

Switching (19%): Covers Layer 2/3 interconnection technologies like VXLAN for policy enforcement.

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 ClearPass Event Viewer message "RADIUS authentication attempt from unknown NAD (10.10.1.10:1812)" indicates that ClearPass received a RADIUS request from the IP address 10.10.1.10, but this IP is not configured as a trusted Network Access Device (NAD) in ClearPass's network device list, or the shared secret doesn't match. The first step in troubleshooting on the switch side is to verify which source IP address the switch is actually using to send these RADIUS requests.

RADIUS Source IP: AOS-CX switches can be configured to use a specific source IP address for RADIUS packets, often using the ip source-interface radius [vrf < vrf-name > ] command. This is important if the switch has multiple IP interfaces or uses VRFs.

Analysis of Commands:

A. show ip source-interface radius: This command directly displays the configured source interface and IP address used for RADIUS communications, allowing comparison with the IP configured in ClearPass.  

B. show aaa authentication-server radius: Shows server group configuration, not the source IP used by the switch.

C. show radius-server shared-secret: Not a standard command; secrets are usually masked in other commands.

D. show radius-server detail: Shows configured RADIUS server details but doesn't explicitly show the source IP the switch is using to originate packets.

Conclusion: To identify why ClearPass sees requests from an "unknown NAD" IP (10.10.1.10), the first step on the switch is to confirm which source IP it's using. show ip source-interface radius provides this crucial information.

The question involves an EAP timeout in HPE Aruba Networking ClearPass Access Tracker during an 802.1X authentication attempt, with the task of identifying a possible cause.

Analysis of Options:

Option A: Incorrect. A client certificate trust issue would cause a different error, not an EAP timeout.

Option B: Incorrect. An expired client certificate would result in an authentication failure, not a timeout.

Option C: Incorrect. If the client sees an expired RADIUS server certificate, it would reject it, but this typically causes a trust error, not a timeout.

Option D: Correct. If the client does not trust the RADIUS server’s certificate (e.g., missing CA certificate or untrusted issuer), it may fail to proceed with the EAP handshake, leading to an EAP timeout.

Why Option D is Correct: In 802.1X authentication with EAP (e.g., EAP-TLS or EAP-PEAP), the client must trust the RADIUS server’s certificate to establish a secure TLS tunnel. If the client’s trust store lacks the Certificate Authority (CA) certificate or the server’s certificate is untrusted (e.g., self-signed without proper installation), the client aborts the EAP handshake, resulting in an EAP timeout logged in ClearPass. This is a common issue in 802.1X deployments and can be resolved by ensuring the client has the correct CA certificate or by using a trusted server certificate, as per HPE Aruba Networking’s security guidelines.

Relevance to Certification Objectives:

Authentication/Authorization (9%): Troubleshooting 802.1X and ClearPass authentication issues.

Security (10%): Diagnosing wired 802.1X with EAP-TLS failures.

Troubleshooting (10%): Resolving authentication timeouts in campus networks.

The administrator observes IP SLA jitter monitoring results spiking to 100% when monitoring UCC sessions. This indicates either extremely severe network jitter or, more likely, a problem with the IP SLA operation or measurement itself on the AOS-CX switch.  

IP SLA & Jitter: IP SLA measures jitter by analyzing the inter-packet delay variation of probe packets. Accurate measurements depend on the switch generating and processing these probes consistently.

Factors Affecting IP SLA Accuracy:

Switch Resource Contention: If the switch's CPU or memory is heavily utilized, the operating system might not schedule the IP SLA process promptly. This can lead to inconsistent generation or processing of probe packets, causing highly inaccurate measurements, including extreme jitter values like 100%.

Control Plane Policing (CoPP): IP SLA packets are control plane traffic. If CoPP policies are too restrictive, they might drop or delay IP SLA probes, skewing results.

Network Path Issues: Actual severe jitter on the network path would also cause high readings, but 100% spikes often suggest measurement error first.

Troubleshooting Steps: When encountering unexpectedly high or erratic IP SLA results, the first step is often to rule out issues with the monitoring device itself.

Analysis of Options:

A. memory and processor usage: Checking the switch's resource utilization is crucial. High CPU/memory load can directly impact the timing accuracy of IP SLA operations.

B. source IP and source port combination: Unlikely to cause 100% jitter spikes unless fundamentally misconfigured causing probe failure.

C. number of NAE agents: NAE agents consume resources, but checking overall CPU/memory (A) is more direct.

D. CoPP settings: A valid concern, as CoPP affects control plane traffic. However, checking overall system load (A) is typically a primary check before delving into specific policies like CoPP.

Conclusion: High memory and processor usage (Option A) on the switch running the IP SLA operation is a common cause for inaccurate timing and resulting erroneous jitter measurements. This should be checked first to ensure the monitoring platform itself is functioning correctly.

This question asks about 802.1X functionality in an AOS-10 environment involving Gateway Clusters.

AOS-10 Gateway/802.1X Architecture:

Authenticator: The Access Point (AP) typically acts as the 802.1X authenticator, handling EAPoL frames with the client.

RADIUS Proxy: The Gateway Cluster (specifically the cluster leader or UDG anchor) often acts as a RADIUS proxy, forwarding RADIUS messages between the APs and the central RADIUS server (e.g., ClearPass). This simplifies RADIUS configuration as the server only needs to know about the gateway cluster.  

CoA: Change of Authorization messages from the RADIUS server are typically sent to the device acting as the RADIUS client, which is the Gateway Cluster when operating in proxy mode.  

Mobility (L2 vs L3): Roaming behavior and User Designated Gateway (UDG) assignment can differ based on whether clients maintain their IP address (L2 mobility) or potentially require new IP information (L3 mobility). L2-connected gateway deployments generally allow for more seamless UDG persistence compared to L3-connected deployments where the client might roam across subnet boundaries managed by different gateways.  

Re-authentication: Seamless roaming mechanisms aim to minimize full re-authentications during roaming events.  

Analysis of Options:

A: Full re-authentication after re-association on L3-connected gateways might occur in some scenarios but contradicts the goal of seamless roaming.  

B: States the UDG remains fixed on L2-connected but not on L3-connected gateways. This aligns with the architectural differences in handling mobility across L2 vs L3 boundaries within a cluster.  

C: Incorrect. CoA is generally sent to the RADIUS client/proxy (the Gateway Cluster), not always directly to the APs.  

D: Correct. Gateways commonly act as a RADIUS proxy, while the AP remains the authenticator handling EAPoL with the client.  

E: Incorrect. The RADIUS proxy function is not limited to only Tunnel and Bridged modes.  

Conclusion: Options B and D accurately describe common characteristics of 802.1X operation within an AOS-10 Gateway Cluster architecture.

The question involves an AOS-CX switch administrator using a packet capture (e.g., tshark) to monitor TCP port 22 traffic and wanting to save it locally for later download, instead of sending it to a remote server.

Analysis of Options:

Option A: Correct. The destination file tshark-pcap command specifies that the packet capture output is saved to a local file (e.g., tshark-pcap) on the switch’s flash storage.

Option B: Incorrect. destination tunnel file tshark-pcpap is not a valid AOS-CX command for local storage.

Option C: Incorrect. destination cpu is not relevant for saving packet captures; it may refer to CPU-based monitoring.

Option D: Incorrect. destination flash:/.'my-mirror.pcnap policy Policy Minor22 has invalid syntax and does not align with packet capture storage.

Why Option A is Correct: In AOS-CX, packet captures can be configured using the monitor command (e.g., monitor session 1 source interface 1/1/1 destination file tshark-pcap). The destination file tshark-pcap option saves the captured packets (e.g., TCP port 22 traffic) to a local file on the switch’s flash storage, which can be downloaded later via SCP, SFTP, or the Web UI. This meets the administrator’s requirement to store the capture locally for future analysis, aligning with AOS-CX’s packet capture capabilities.

Relevance to Certification Objectives:

Troubleshooting (10%): Performing advanced troubleshooting using packet captures.

Performance Optimization (6%): Analyzing network traffic for performance issues.

Connectivity (9%): Diagnosing connectivity issues with monitoring tools.

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 using TCP 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 the firewall change event 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 question involves granting read-only access to a user with physical access to an AOS-CX switch. The task is to identify the correct command set.

Analysis of Options (Assumed Context): Read-only access is typically configured using AAA with a privilege level or role. Option C is assumed to include commands like:

text

Copy

aaa authentication login privilege-mode

user operator password plaintext < password >

This assigns the “operator” role, which provides read-only access.

Option A: Incorrect. Likely uses an incorrect role or privilege level (e.g., admin).

Option B: Incorrect. May configure a role with excessive permissions or invalid syntax.

Option C: Correct. Configures a user with the “operator” role for read-only access.

Option D: Incorrect. Likely includes commands for a different access level or invalid configuration.

Why Option C is Correct: In AOS-CX, the “operator” role provides read-only access, allowing users to view configurations and status (e.g., show commands) without modifying settings. The command user operator password plaintext < password > creates a local user with this role, and aaa authentication login privilege-mode ensures privilege levels are enforced upon login. This configuration is suitable for a user with physical access (e.g., via console or SSH), ensuring they cannot alter the switch, as per HPE Aruba Networking’s AAA security practices.

Relevance to Certification Objectives:

Authentication/Authorization (9%): Configuring AAA for user access control.

Security (10%): Implementing secure management access in customer networks.

Troubleshooting (10%): Ensuring proper user permissions for network management.

The question involves troubleshooting an issue where the command output is initially unknown, but subsequent executions show diagnostic information for an interface (1/1/X). The task is to identify appropriate diagnostic commands to troubleshoot the issue.

Analysis of Options:

Option A (diag interface transceiver al): Incorrect syntax; “al” is not a valid parameter.

Option B (diag interface 1/VX transceiver all): Incorrect syntax; “1/VX” is not a valid interface format.

Option C (diag cable-diagnostic 1/1/X): Correct. This command runs a cable diagnostic test (TDR) on interface 1/1/X to check for cable faults, such as opens or shorts.

Option D (diag cable 1/1/X): Incorrect; “diag cable” is not a valid AOS-CX command.

Option E (diag 1/1/X transceiver all): Correct. This command displays detailed transceiver information, including status, errors, and signal quality, useful for diagnosing interface issues.

Why C and E are Correct: The diag cable-diagnostic 1/1/X command is used to perform TDR tests to identify cable faults, which could cause connectivity issues. The diag 1/1/X transceiver all command provides detailed transceiver diagnostics, such as power levels, errors, or hardware issues, helping pinpoint problems with the interface or connected device. These commands align with AOS-CX troubleshooting workflows for physical layer issues.

Relevance to Certification Objectives:

Troubleshooting (10%): Involves using diagnostic commands to troubleshoot campus network issues.

Connectivity (9%): Includes identifying problem areas in device deployment, such as cabling or transceiver issues.

The question involves a VSX configuration with CX 8325 switches (agg-sw1 and agg-sw2) where SVI 10’s active-gateway is set up. For testing, SVI 10 on agg-sw1 is shut down, and traffic from a client connected to Edge-1 is initiated toward the default route. The task is to determine the expected behavior.

Analysis of Options:

Option A: Incorrect. Traffic is not dropped, as VSX ensures redundancy via the active-gateway on agg-sw2.

Option B: Incorrect. Traffic does not traverse the ISL unnecessarily; agg-sw2 takes over directly.

Option C: Correct. Traffic continues unaffected, with a 50ms failover time for agg-sw2 to assume forwarding responsibilities for SVI 10.

Option D: Incorrect. Traffic is not dropped, and vsx-sync does not disable SVI 10 on agg-sw2; it ensures consistency.

Why Option C is Correct: In a VSX cluster with active-gateway, both switches (agg-sw1 and agg-sw2) share a virtual IP and vMAC for SVI 10, allowing either to respond to ARP requests and forward traffic. Shutting down SVI 10 on agg-sw1 triggers agg-sw2 to take over Layer 3 forwarding, leveraging the active-gateway configuration. VSX’s fast failover mechanism ensures a typical failover time of approximately 50ms, making the transition seamless for clients on Edge-1. The vsx-sync feature ensures SVI configurations remain consistent, preventing traffic disruption. This behavior aligns with HPE Aruba Networking’s VSX high-availability design.

Relevance to Certification Objectives:

Network Resiliency and Virtualization (8%): Designing and troubleshooting VSX for high availability.

Routing (16%): Ensuring seamless Layer 3 forwarding in VSX environments.

Troubleshooting (10%): Diagnosing failover behavior in campus networks.

The question requires matching the default BGP keepalive and hold-down timers on AOS-CX switches to their respective values.

Analysis of Options:

Keepalive Timer: The keepalive timer determines how often BGP keepalive messages are sent to maintain a session. The default value on AOS-CX switches is 60 seconds.

Hold-down Timer: The hold-down timer specifies the maximum time a BGP session can remain active without receiving a keepalive or update message before it is considered down. The default value on AOS-CX switches is 180 seconds.

Why This Mapping is Correct: Per BGP standards (RFC 4271) and HPE Aruba Networking AOS-CX documentation, the default BGP keepalive timer is 60 seconds, and the hold-down timer is 180 seconds (three times the keepalive interval). These timers ensure BGP sessions remain stable while allowing timely detection of peer failures. The AOS-CX implementation adheres to these defaults unless explicitly configured otherwise.

Relevance to Certification Objectives:

Routing (16%): Involves designing and troubleshooting BGP routing topologies, including timer configurations.

Troubleshooting (10%): Includes diagnosing BGP session issues related to timers.

The user's device fails 802.1X EAP-TLS authentication, but the client-side certificate is known to be valid. We need two likely causes.

EAP-TLS Process: Involves mutual certificate validation and TLS handshake between client and RADIUS server (proxied by NAD).

Causes (Client Cert OK):

Server Certificate Issues: Client doesn't trust server cert (Untrusted CA, name mismatch, expired).

EAP Type Mismatch: Client supplicant configured for different EAP type than RADIUS server policy.

RADIUS Server Issues: Policy misconfiguration, user not found, internal errors.

NAD <</b> - > RADIUS Communication Failure: Switch cannot reach RADIUS server (IP connectivity, firewall, routing), incorrect shared secret.

Client Supplicant Misconfiguration: Incorrect identity, settings other than the certificate itself.

Network packet loss.

Analysis of Options (Select Two):

A: Wrong gateway affects L3 post-authentication.

B: ACL blocking EAPoL/RADIUS is possible but less common than config errors.

C: EAP-type mismatch: A very common configuration error leading to failure.

D: Wrong MAC address is irrelevant for EAP-TLS failure itself.

E: NAD not able to communicate with DNS servers: DNS isn't directly involved in EAP-TLS. However, if interpreted more broadly as NAD not able to communicate with the RADIUS server (due to IP routing, firewall, or incorrect server address), this is a very common cause of failure.

Conclusion: An EAP-type mismatch (C) is a prime suspect when basic certificate validity is assumed. Failure of the Network Access Device (NAD - the switch) to communicate with the RADIUS server (E, interpreted broadly as RADIUS reachability) is another major category of failure causes.