HPE7-A08 HPE Aruba Networking Certified Professional - Switching Free Practice Exam Questions (2026 Updated)

The LACP fallback command in Aruba VSX configurations allows the system to continue forwarding traffic even if LACP negotiation fails or is not established. This is useful when provisioning a gateway or link that does not support LACP, ensuring that the port remains operational in a static manner.

It is not specifically for backward compatibility with LACP v1.

It does not relate to operation with a single partner interface.

It also is not about active/passive LACP modes per se.

Therefore, LACP fallback is configured to support provisioning a gateway without LACP.

Colorless Ports is a foundational concept in Aruba’s Dynamic Segmentation strategy. It refers to a switch configuration where all access ports are configured identically, and the network identity of the port changes dynamically based on the device that plugs into it.

Role of 802.1X: To achieve a colorless port, the switch must first identify the device or user. 802.1X (Port-based Network Access Control) is the industry-standard method for providing this identification. When a device connects, the switch challenges it for credentials. Based on the response, the RADIUS server tells the switch which " User Role " to apply, which then sets the VLAN, QoS, and ACLs.

Complementary Methods: While 802.1X is the primary answer here, colorless ports also frequently utilize MAC Authentication for devices that do not support 802.1X (like printers).

Evaluating Other Options:

Option A: 802.1Q is the standard for VLAN tagging. While colorless ports use VLANs, 802.1Q is a static trunking/tagging protocol and does not provide the " dynamic " intelligence required for a colorless environment.

Option C: 802.11X is a common " trick " option on exams. 802.11 is the standard for Wireless (Wi-Fi), and there is no specific " 802.11X " protocol used for wired switch port security.

Option D: 802.1AD refers to " QinQ " or double-tagging, used primarily in service provider environments to tunnel customer VLANs. It has no relevance to the colorless port security model.

During a VSX firmware upgrade, the vsx-syned process stops synchronization while the switches have mismatched software versions. Synchronization resumes once both switches run the same software.

VSX synchronization cannot continue while versions mismatch (contrary to options B and D).

Compatibility mode is not required before rebooting secondary switch (Option D incorrect).

This behavior ensures consistency and avoids split-brain during upgrades.

The question relates to configuring port 1/1/44 on an Aruba CX 8325 switch to connect to a 2930F switch (Aruba 2930F series). The key factor is interoperability between these two devices, especially regarding link aggregation and port channel settings.

The Aruba 2930F typically uses static or LACP link aggregation with standard settings. To connect an Aruba CX 8325 port to a 2930F port, the CX configuration must align with the 2930F settings, particularly regarding:

Enabling LACP (Link Aggregation Control Protocol) on the port.

Correct VLAN tagging or trunk mode.

Matching speed and duplex settings.

From the options given, answer A corresponds to enabling LACP with appropriate trunk configuration that matches the 2930F. The other options either have mismatches in aggregation or trunking mode or missing LACP.

To receive a monthly report tracking available licenses and their expiration dates in Aruba Central, the Infra Inventory report should be scheduled. It provides detailed information about device inventories, including licenses and expiration.

Switch Capacity Planning focuses on resource utilization.

Resource Utilization monitors system performance.

Network report focuses on topology and health.

OSPF route summarization is a critical technique for managing the size of the Link State Database (LSDB) and the routing table by consolidating multiple specific routes into a single aggregate advertisement.

Summarization Point: In OSPF, inter-area summarization (consolidating Type 1 and Type 2 LSAs into a single Type 3 Summary LSA) can only be performed on an Area Border Router (ABR) .

Configuring the Area of Origin: A fundamental rule of OSPF summarization is that the range command must be applied to the Area where the specific routes originate . In the exhibit, the /24 subnets (10.1.0.0/24 through 10.1.255.0/24) are located in Area 2 . Therefore, the ABR must be configured under area 2.

AOS-CX Syntax: On HPE Aruba Networking CX switches, the command to summarize internal routes is area < AREA-ID > range < IP-ADDR/MASK > type inter-area.

The type inter-area keyword specifies that the ABR should take the internal routes from the specified area and advertise them as an Inter-Area (Type 3) summary to other connected areas (like the Backbone Area 0).

Analyzing the Options:

Option A and D: These are incorrect because they apply the range to Area 0 . This would only work if the routes originated in Area 0 and you wanted to summarize them for Area 2.

Option B: This is incorrect because summary-only is not the standard keyword for OSPF summarization in the AOS-CX CLI. While similar concepts exist in other protocols (like BGP) or other vendors, AOS-CX uses type inter-area to define the summary behavior.

Option C (Correct): It correctly identifies Area 2 as the source and uses the proper AOS-CX syntax to generate a 10.1.0.0/16 summary route, which covers the entire 10.1.x.x range shown in the exhibit.

Colorless Ports are a foundational element of Aruba’s Dynamic Segmentation strategy. They allow any device to be plugged into any access port without requiring manual VLAN or ACL configuration by the IT staff.

The Role of Authentication: When a device connects, the switch uses 802.1X or MAC Authentication to identify the device and communicate with Aruba ClearPass .

Downloadable User Roles (DUR): Instead of pre-configuring thousands of roles locally on every switch, the switch downloads the specific policy—including VLAN assignment, QoS, and Access Control Lists (ACLs)—directly from ClearPass. This is the Downloadable User Role .

Why this is " Colorless " : Because the policy is defined centrally and " downloaded " to the port only when needed, the physical port has no static identity (no " color " ). This simplifies deployment and ensures that security policies follow the user or device regardless of where they plug in.

The exhibit shows the output of the show vsf command on a two-member Virtual Switching Framework (VSF) stack. To determine the outcome of a failover, we must look at the assigned roles and the secondary member configuration.

Analyzing the Roles: * Member 1 is the Conductor (the master controller).

Member 2 is a Member (a subordinate switch).

The Secondary Member Requirement: In VSF, high availability is not automatic just by having two switches. You must explicitly designate a Secondary member to act as the " Standby " for the Conductor. In the exhibit, the line Secondary : is blank .

Failure Scenario: * If Member 1 (Conductor) fails, Member 2 will look to see if it is the designated Secondary.

Since no Secondary is configured , Member 2 has no authority to take over the control plane or management functions of the stack.

Member 2 will remain in the " Member " state . Because the Conductor is gone and there is no Standby to promote, the logical stack effectively collapses; Member 2 will likely reboot or lose its configuration context because it has no Conductor to sync with. It certainly will not become the Conductor.

Best Practice Correction: To fix this, an administrator should have run the command vsf secondary-member 2. This would have changed Member 2 ' s status from " Member " to " Standby " (or Secondary), allowing it to transition to " Conductor " if Member 1 failed.

Device Profiles on AOS-CX switches are a " Lite " version of Dynamic Segmentation, allowing the switch to automatically configure a port when a specific device is detected via LLDP or CDP, without needing a RADIUS server.

Associate an LLDP group (Option C): To " catch " a device, you first define a Device Group (often an lldp-group) that contains match criteria such as the System Name or OUI of an Aruba AP. This group tells the switch which devices should trigger the profile.

Associate a role (Option A): Once a device matches the group, the switch needs to know what to do with it. The Role is the container that holds all the port attributes (VLAN, PoE priority, STP settings, etc.). The Device Profile ' s job is to " bridge " the group and the role together using the associate role and associate lldp-group commands.

Why other options are incorrect:

Options B, D, and E: These are all settings that are configured inside the Role . You do not associate a VLAN or an ACL directly to the Profile; you associate them to the Role, and then associate the Role to the Profile.

For a 1 Gbps link between two Aruba CX switches, the appropriate SFP port type is an SFP (Small Form-factor Pluggable). SFP+ and SFP28 are used for higher speeds such as 10 Gbps and 25 Gbps, respectively. QSFP+ is for even higher speeds (40 Gbps).

SFP supports 1 Gbps (1000BASE-X)

SFP+ supports 10 Gbps

SFP28 supports 25 Gbps and above

QSFP+ supports 40 Gbps and above

Therefore, the correct port type for a 1 Gbps link is SFP.

Dynamic ARP Protection (DAP) is a security feature used to intercept and validate ARP packets in a network to prevent " man-in-the-middle " attacks like ARP spoofing.

Validation Source: For the switch to know if an ARP packet is legitimate, it must check the sender ' s IP and MAC address against a trusted database.

Dynamic vs. Static: * In most modern environments, the switch builds this database automatically by using DHCP Snooping . When a client gets an IP from a DHCP server, the switch records the binding.

Static Environments (The Solution): If you have servers or devices with static IP addresses (no DHCP server), DHCP snooping will have no record of them. To prevent these legitimate devices from being blocked by ARP protection, you must manually configure Static IP-to-MAC bindings .

Why Option D is Correct: It correctly identifies that the feature is flexible enough to support non-DHCP environments through manual configuration.

Why others are incorrect: * Option A: While highly recommended, a DHCP server is not strictly required because of the static binding fallback.

Option C: Simply enabling the features isn ' t enough; you must also consider untrusted vs. trusted ports. Furthermore, " full information " is a bit of an overstatement, as static devices still need manual intervention.

This exhibit highlights a critical operational requirement for Virtual Switching Extension (VSX) : Version Consistency .

Analyzing the Exhibit: * The Local Software Version is GL.10.09.0010.

The Peer (sw-agg2) Software Version is GL.10.11.1021.

The Config Sync Status explicitly reports: sw_image_version_mismatch_error.

The Impact of Software Mismatch: The VSX configuration synchronization engine ( vsx-sync ) requires that both the primary and secondary switches run the exact same version of AOS-CX. When a mismatch is detected, the synchronization of configuration (VLANs, LAGs, etc.) is immediately halted to prevent database corruption or unpredictable behavior.

Incompatible State: While the data plane (traffic forwarding) typically continues to function using the last known good configuration, the control plane " cluster " is effectively in an incompatible mode for management. You cannot make configuration changes on the Primary and expect them to push to the Secondary until the versions are aligned.

Evaluating Other Options:

Option A: Incorrect. The mismatch_error halts all config sync, regardless of whether the specific command exists in both versions.

Option C: A " Live Upgrade " (VSX Orchestration) requires both switches to have access to the same target image and for the sync engine to be healthy. You cannot live upgrade when the sync engine is already in an error state.

Option D: VSX is a distributed forwarding architecture. It does not " forward all traffic " to the primary. Traffic is balanced across MC-LAG links unless a physical failure occurs.

Aruba Central utilizes a " Top-Down " management model for UI Groups . To maintain the integrity of the network and ensure that the central dashboard remains the " Source of Truth, " specific logic is applied during the onboarding process.

Configuration Conflict Prevention: If a group in Central already has a configuration defined (VLANs, DNS, NTP, etc.), and you add a switch that has its own local startup-configuration , Central detects a conflict. It does not know whether to trust the local switch settings or the group settings.

The Factory Default Rule: To protect the network from unintended configuration overwrites, Central will only automatically sync and push group settings to a switch that is in a Factory Default state. If the switch has an existing configuration, Central marks it as having a " Config Conflict " and stops the synchronization process until an administrator manually intervenes to choose which configuration should " win. "

Evaluating other options:

Option B: If Central weren ' t enabled, the switch wouldn ' t even show up as " connected " or " online " in the dashboard, let alone fail a sync within a group.

Option C: Central supports VSX monitoring and management (particularly through Template groups or specific UI workflows).

Option D: Authorization happens at the " Device Inventory " level. If you have already added it to a group, the device is already authorized.

In a network management environment like Aruba Central , alerts are used to provide proactive notification of infrastructure degradation. When dealing specifically with physical cabling issues (Layer 1), we look for symptoms of signal degradation or negotiation failures.

Switch Port Input Errors (Option A): This is the most direct indicator of a cabling problem. Physical issues—such as a bad crimp, a cable exceeded its maximum length, electromagnetic interference (EMI), or a damaged pin—typically manifest as CRC errors , runts , or giants . Monitoring for input errors allows Central to flag a port as unhealthy due to physical data corruption.

Switch Port Duplex Mode (Option E): While most modern devices use Auto-Negotiation, physical layer issues or faulty older hardware can lead to a Duplex Mismatch (e.g., one side is Half-Duplex, the other is Full-Duplex). This results in late collisions and extreme performance degradation. An alert for Duplex Mode changes or mismatches is a standard part of physical layer troubleshooting.

Why other options are incorrect:

Option B: Rx Rate monitors the volume of traffic. High or low traffic doesn ' t inherently mean the cable is bad; it just means the link is busy or idle.

Option C: Hardware failure refers to the internal components of the switch (ASICs, Fans, Power Supplies), not the external cabling.

Option D: Uplink Port Usage is a capacity planning metric (Layer 2/3) rather than a physical integrity metric.

In complex network designs involving different administrative domains (like a Campus and a Data Center), it is often desirable to prevent Spanning Tree Protocol (STP) from merging the two environments into a single, massive logical tree.

The Goal of Isolation: " Isolated spanning tree topology " means that the Campus and the Data Center should each have their own independent Root Bridge and calculate their own loop-free paths without being influenced by one another.

BPDU Filter (The Solution): When you apply BPDU Filter to an interface, the switch stops sending BPDUs out of that port and, more importantly, ignores any incoming BPDUs. Because the Campus switch no longer " sees " the BPDUs coming from the Data Center core, it will stop recognizing the DC as the Root Bridge and will instead elect a local Root Bridge (or remain as the Root itself). This effectively breaks the STP connection between the two domains while still allowing Layer 2 data traffic to flow.

Evaluating Other Options:

Option A (Root Guard): This is used to prevent a specific port from becoming a Root Port. If a superior BPDU is received, the port is placed into a " root-inconsistent " state (blocked). While this protects the local Root role, it does not " isolate " the topology; the switches still participate in the same overall STP domain.

Option C (BPDU Guard): This is intended for edge ports (connected to PCs/Printers). If it receives a BPDU, it shuts down the port entirely (rxtx-disable). Applying this to a core-to-core link would cause a total loss of connectivity as soon as the DC core sends a BPDU.

Option D (Admin Edge): This simply tells the switch to skip the Listening/Learning states and go straight to Forwarding. It does not provide topology isolation.

To answer this correctly, it is vital to distinguish between VSF (Virtual Switching Framework) and VSX (Virtual Switching Extension) .

VSF (Virtual Switching Framework) Logic: The CX 6200 and 6300 series use VSF to form a " stack. " In a VSF stack, multiple physical switches operate as a single logical device with a single control plane and a single configuration file.

LAG Configuration in VSF: Because a VSF stack is a single logical entity, creating a Link Aggregation Group (LAG) that spans multiple members is handled exactly like a standard LAG on a single switch. You simply create the interface lag X and then assign physical ports from different members (e.g., member 1 and member 2) to that same LAG ID.

The " multi-chassis " Keyword: The keyword multi-chassis (seen in Options B and D) is specific to VSX , which is used on high-end switches like the CX 6400 and 8000 series. VSX involves two separate control planes that synchronize information. In VSX, you must use the multi-chassis command to let the switches know the LAG is split across two different chassis. In VSF, this keyword is not used and would result in a syntax error on a 6200 switch.

Analyzing the Options:

Option A (Correct): It uses standard interface lag 1 syntax. It assigns port 1/1/1 (from member 1) and port 2/1/1 (from member 2) to the same LAG. This perfectly fulfills the requirement for redundant ports from both switches in a VSF stack.

Option B: Incorrect because it uses the multi-chassis keyword (VSX only).

Option C: Incorrect because it only configures a port from one switch (1/1/1), failing the requirement for redundancy across both switches.

Option D: Incorrect because it uses the multi-chassis keyword (VSX only).

Key Takeaway for the ACP-S Exam: * VSF (6200/6300) = Standard LAG configuration across members.

VSX (6400/8000) = Requires multi-chassis keyword under the LAG interface.

To influence BGP path selection, you must understand the BGP Best Path Selection Algorithm used by AOS-CX. When multiple paths to the same prefix exist, the switch evaluates attributes in a specific order.

The Decision Order:

Highest Weight (Proprietary/Local to the switch).

Highest Local Preference (Standard, used within an AS).

Locally originated.

Shortest AS Path .

Lowest MED (Metric) .

Local Preference (LP): Although Local Preference is an attribute that is typically passed between iBGP peers, it is the most common tool used on an ingress (import) policy from an eBGP peer to tell the local switch (and the rest of the AS) " this is our preferred exit/entry point. "

The default Local Preference is 100 .

By creating a route-map that sets the Local Preference to 200 and applying it to Peer A on import , the switch will see Peer A ' s route as having a higher LP than Peer B ' s route (which remains at 100).

Local Preference vs. Metric (MED): Local Preference is evaluated before the Metric (MED) in the decision process.

Option C works because LP 200 is higher than 100.

Option B is incorrect because setting a higher Metric (200) actually makes a route less preferred (lower metric wins).

Option D would technically make Peer A preferred (because Peer B would have a higher/worse metric), but because Local Preference is higher in the decision-making hierarchy, Option C is the more robust and standard BGP engineering choice in Aruba architectures.

Example CLI Logic:

Bash

route-map PREFER_A permit seq 10

set local-preference 200

!

router bgp 65001

neighbor < Peer_A_IP > route-map PREFER_A in

The LACP state event Actor state: ALFNCD, Partner state: ASFNCD indicates that the LACP negotiation between the local (actor) and peer (partner) is successful with all flags matching and no errors.

ALFNCD and ASFNCD are standard LACP states indicating Active, Long timeout, Aggregation capable, Not synchronized, Collecting, and Distributing flags set as expected.

Also, the log shows the LACP rate is set to slow, which is the default.

Thus, the output shows the LAG 253 has a matching LACP configuration with its peer.

The output indicates the use of an aspath-list within a route-map, which is used to filter or match accepted AS paths in BGP. The aspath-list defines which AS paths are accepted, controlling route advertisement or acceptance.

The route-map is applied to neighbor configurations to filter routes based on AS paths.

Prefix-lists filter IP prefixes, not AS paths.

Neighbor remote-as export is not a valid command.

Therefore, the aspath-list is correctly used to define accepted AS paths.