Pass the HP Aruba Certified Switching Expert HPE7-A08 Questions and answers with CertsForce

For an availability-sensitive WLAN deployment, the appropriate AOS-CX capabilities are Quick PoE and Always-on PoE . They address two different switch power-transition conditions and together minimize interruption to PoE-powered APs.

Always-on PoE maintains PoE delivery to already powered devices during a soft reboot , including scheduled switch reboots and firmware upgrade operations. Consequently, an AP-615 does not unnecessarily lose electrical power and perform a complete hardware boot merely because the CX switch ' s operating system is restarting. HPE Aruba specifically identifies this capability on the CX 6300 as part of its high-availability PoE functionality. Aruba Networks

Quick PoE addresses a cold reboot/power-up condition. HPE Aruba defines it as allowing the PSE to restore power to connected powered devices shortly after the switch powers up, rather than waiting for the complete network operating system initialization sequence. Aruba Networks Developer Hub

Using both features therefore covers both major restart scenarios: Always-on PoE preserves existing power across software restarts, while Quick PoE accelerates AP power restoration following a cold startup. For hospital WLANs supporting critical endpoints, this combination provides the highest AP power availability among the listed choices.

Study Guide References: CX 6300 PoE Architecture; Always-on PoE; Quick PoE; High-Availability Campus Design; AP Power Resiliency.

The key evidence is the Actor State for the local lag253(mc) interface. Its state is shown as:

ASFNCD

According to the AOS-CX show lacp interfaces state abbreviations, A means Active, S means Short-timeout , F means Aggregable, N means InSync, C means Collecting, and D means Distributing. Aruba Networks

The significant difference is the S (Short-timeout) state. Other local LAGs in the exhibit show ALFNCD, where L means Long-timeout . AOS-CX uses the slow LACP rate by default , which requests LACP heartbeat transmission every 30 seconds with a 90-second timeout. Configuring lacp rate fast changes this behavior to approximately one-second LACP heartbeats and a three-second timeout. Therefore, the S state on local lag253 demonstrates that this LAG has been explicitly configured away from the default behavior—hence it has a custom LACP rate configuration . Aruba Networks

Option B is not supported by the operational state. Although the partner displays an aggregator key of 0, lag253 is InSync, Collecting, and Distributing , and its forwarding state is up . Thus, the output does not indicate that a different partner aggregator key is required. lag27 likewise shows normal aggregation with both members using the same aggregation key.

Study Guide References: LACP State Flags; show lacp interfaces; LACP Fast/Slow Rate; Short and Long Timeout; VSX Multi-Chassis LAG.

When deploying HPE Aruba VSX switches parallel to existing HPE Comware switches, choosing a first-hop redundancy protocol compatible with both platforms is essential. VRRP (Virtual Router Redundancy Protocol) is widely supported across multiple vendors and is suitable for multi-vendor environments.

HSRP is Cisco proprietary and not supported on Aruba Comware or CX.

Active Forwarding and Active Gateway are Aruba VSX internal mechanisms, not standard first-hop redundancy protocols.

VRRP provides seamless failover and is supported in Comware and Aruba CX platforms.

Thus, VRRP is the suitable choice.

LACP (Link Aggregation Control Protocol) modes can be active or passive. When two switches are both configured in passive mode, no LACP packets are initiated, causing the link aggregation to fail or go into a block state.

Changing one side from passive to active causes that switch to initiate LACP negotiation, resolving the block state.

Changing to static mode disables LACP negotiation, which is not recommended unless both sides are static.

Changing timeout does not solve LACP block issues caused by mode mismatches.

Therefore, changing one switch’s LACP mode from passive to active is necessary to resolve the block.

The CX 6100 switches in Building B must be replaced with CX 6200 Series switches to implement the required wired Dynamic Segmentation architecture using User-Based Tunneling (UBT) .

HPE Aruba Networking defines Dynamic Segmentation as role-based client segmentation in which authenticated wired users can have their traffic forwarded through UBT to an Aruba Mobility Gateway for centralized policy enforcement. Importantly, the official AOS-CX platform support matrix identifies UBT support on the 4100i, 6200, 6300, and 6400 Series ; the CX 6100 is not included among the supported UBT platforms. Aruba Networks

This is a hardware/platform capability distinction, so applying a Premium license to a CX 6100 does not make it a UBT-capable access switch. The correct access-layer replacement in this design is therefore the CX 6200 .

Options B and C also misrepresent the tunneling architecture. Aruba UBT uses GRE-based tunneling from the access switch to an Aruba Gateway , where centralized user-role and firewall policy can be enforced. HPE Aruba ' s Dynamic Segmentation documentation explicitly describes UBT as GRE tunneling toward an Aruba Gateway. Aruba Networks Therefore, the CX 8325 is not the UBT termination point, and UBT does not use a VXLAN tunnel to the 9240.

Study Guide References: Dynamic Segmentation; User-Based Tunneling; UBT Platform Support; GRE Tunneling; Mobility Gateway Policy Enforcement; CX 6200 Access Architecture.

To isolate wired ports on the same VLAN on a large scale (such as hotel rooms) but allow communication within the same VLAN for common areas, Private VLANs (PVLANs) are recommended. PVLANs allow segmentation within a single VLAN by dividing it into primary and secondary VLANs, controlling communication between ports.

VPN and VXLAN are overlay technologies for different purposes.

UBT (User-Based Tunneling) is related to wireless user segmentation, not wired port isolation.

Therefore, PVLANs provide the simplest and most effective solution to isolate room ports within a single VLAN.

To resolve this QoS mapping issue on AOS-CX, you must understand the hierarchy of Trust Levels and how they interact with Link Aggregation Groups (LAGs).

Trust Hierarchy: AOS-CX switches use a " top-down " approach for QoS.

Global Trust: Setting qos trust dscp globally means that, by default, every port on the switch will look at the Layer 3 DSCP markings to determine queue priority.

Interface Override: You can override the global setting on a per-interface basis. If a specific device or service (like the video streaming service in this prompt) relies solely on Layer 2 CoS (802.1p) markings rather than DSCP, the switch will ignore those CoS markings under the global DSCP policy and place the traffic in a default (best-effort) queue.

LAG Configuration Logic: In the AOS-CX architecture, a LAG is a logical interface (interface lag 20).

Configuration parameters for the bundle (such as VLANs, ACLs, and QoS trust) should be applied to the logical LAG interface, not the individual physical member ports (1/1/20 and 2/1/20).

Once applied to the LAG, the settings are automatically inherited by all physical members.

Analyzing the Options:

Option D (Correct): By entering the interface lag 20 context and applying qos trust cos, you are instructing the switch to ignore the global DSCP setting for this specific bundle and instead trust the Layer 2 priority bits. This allows the video service to once again map correctly to the intended priority queues.

Option A: This is unnecessarily complex. Setting the physical member ports to qos trust none and then the LAG to cos is redundant because the LAG configuration overrides the physical port settings in this context.

Option B: qos trust dscp, cos is not a valid AOS-CX command. Unlike the older AOS-S (ProCurve) software which allowed a combined dscp-cos trust, AOS-CX requires you to choose a single trust type (DSCP, CoS, or None) per interface.

Option C: This applies the configuration to the physical ports only. In an AOS-CX VSF/LAG environment, this is considered a configuration error or " best practice " violation, as the logical LAG interface should hold the configuration.

In the AOS-CX architecture, a Local User Role (LUR) is a logical container that defines the network privileges and connectivity settings for a client once they have been successfully authenticated. Unlike " Downloadable User Roles " (DUR), which are stored on ClearPass, LURs are defined directly in the switch configuration.

VLAN Assignment (Option A): One of the primary functions of a user role is to dynamically assign a client to a specific VLAN. This allows the physical port to remain " colorless " —the port ' s VLAN membership is determined by the identity of the user rather than a static configuration on the interface.

ACL (Access Control List) (Option E): To enforce " Least Privilege " security, LURs allow you to attach an IPv4 or IPv6 ACL directly to the role. This ensures that even if two users are in the same VLAN, their traffic can be filtered differently based on the role they were assigned (e.g., a " Contractor " role might have an ACL blocking access to internal servers, while an " Employee " role does not).

Why other options are incorrect:

Option B: The ClearPass server is part of the global AAA (RADIUS) configuration. It is the destination for authentication requests, not a parameter defined within a specific user role.

Option C: While many CLI commands allow for a description, it is a metadata field for administrative clarity and is not considered a functional " parameter " of network enforcement in the context of the ACP-S exam.

Option D: Authentication methods (like 802.1X or MAC-auth) are the triggers that result in a role being applied. They are configured at the interface or global level, not inside the role itself.

The exhibit shows a configuration for a Route Map named BGP-EXPORT. To identify the correct statement, we must analyze the specific BGP attributes being manipulated in the sequence entries.

Analyzing Sequence 10:

Match: It looks for network prefixes defined in an IP prefix-list named bgp-export.

Set: It executes the command as-path prepend 65345 65345 65345.

AS Path Prepending: In BGP, the " Shortest AS Path " is one of the primary decision factors in the Best Path Selection Algorithm. AS Path Prepending is a technique used by network administrators to make a specific route appear " less desirable " to external neighbors. By adding multiple instances of an AS number (in this case, AS 65345 is added three times) to the existing AS Path, the switch artificially increases the length of the path.

Conclusion for Statement B: Because the route map prepends the AS path for the matched prefixes, the resulting BGP update sent to neighbors will contain an AS path that is significantly longer than the default (which would normally just include the local AS). Therefore, statement B is true.

Evaluating other options:

Option A: This is technically incorrect syntax. Route maps are applied to BGP neighbors using the command neighbor [IP] route-map BGP-EXPORT out (for export) or in (for import). There is no " remote-as export " command for binding route maps.

Option C: There is no set metric or set med command visible in the output. MED (Multi-Exit Discriminator) is a different attribute used to influence inbound traffic from an adjacent AS.

Option D: This is a conceptual error. IP prefix-lists are used to match IP addresses and subnet masks (the " prefixes " ). AS Path Lists (as seen in Seq 100) or regular expressions are used to match AS paths. You do not configure the path itself inside a prefix-list.