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NEW QUESTION # 63
You configured a tunneled SSID with captive portal and a ClearPass Guest Self Registration workflow when testing and launching the self-registration workflow, after successful registration, the login action shows the following error:
What is the best solution to resolve this error?
- A. You need to include the root and intermediate certificates in the captive portal certificate for your gateway
- B. You need to change the Login Address in ClearPass to securelogin arubanetworKs.com
- C. You need to De connected to the guest SSiD while testing.
- D. You need to include the root and intermediate certificates in the captive portal certificate for your access points
Answer: A
Explanation:
Including the root and intermediate certificates in the captive portal certificate for the gateway will resolve the error seen during the login action after successful registration. This is necessary to ensure the SSL/TLS handshake can be completed successfully, as the client browser needs to validate the entire certificate chain.
NEW QUESTION # 64
Which statement about the AOS-CX VOQ feature is true?
- A. It provides ingress buffers with queues for each egress port to reduce risk of dropped packets
- B. It optimizes LACP uplinks that connect to multi-chassis VSX LAGs
- C. It dynamically allocates extra buffer space to egress queues to reduce the potential of dropped packets
- D. It enhances local prioritization of datagrams marked with priority code points
Answer: A
Explanation:
Comprehensive and Detailed Explanation (Verified Extract from HPE Aruba Networking Switching Documentation) VOQ (Virtual Output Queuing) is a hardware-based queuing mechanism used in the ArubaOS-CX architecture to prevent head-of-line blocking and minimize packet drops in high-throughput environments.
How VOQ Works:
* Each ingress port maintains a separate queue for every egress port in the system.
* When a packet arrives, it is placed in the ingress buffer corresponding to its destination egress port.
* This structure ensures that traffic destined for one congested egress port does not block packets heading to other ports.
This architecture is critical in high-speed modular switches and aggregation cores (such as the Aruba 8400 and 10000 Series), allowing the fabric interconnect to forward traffic efficiently without dropping packets due to port congestion.
ArubaOS-CX Technical Extract:
"Virtual Output Queuing (VOQ) provides per-egress-port queuing at ingress buffers, preventing head-of-line blocking and ensuring high throughput across the switch fabric. Each ingress queue corresponds to a specific egress port, allowing packets to be transmitted as soon as the egress port becomes available." Option Analysis:
* A. Incorrect - Refers to priority marking (QoS), not VOQ operation.
* B. Correct - VOQ provides ingress buffers with queues for each egress port, reducing dropped packets and head-of-line blocking.
* C. Incorrect - VOQ is not related to LACP or VSX link aggregation.
* D. Incorrect - VOQ does not dynamically allocate egress buffer space; it segregates ingress queues per egress destination.
Final Verified answer: B
Reference Sources (HPE Aruba Official Materials):
* Aruba AOS-CX Technical Architecture Overview - Virtual Output Queuing (VOQ)
* Aruba 8400/10000 Series Switches Hardware and Performance Guide
* Aruba Certified Switching Expert (ACSE) Study Guide - Switch Fabric and Queuing Mechanisms
NEW QUESTION # 65
Which command would allow you to verity receipt of a CoA message on an AOS 10 GW?
- A. packet-capture interprocess udp 3799
- B. packet-capture datapath udp 3799
- C. tcpdump host-port 3799
- D. packet-capture controipath udp 3799
Answer: D
Explanation:
The Change of Authorization (CoA) messages are used in network access control scenarios and are typically received by the network access server, in this case, an Aruba AOS 10 Gateway. The correct command to verify the receipt of a CoA message is related to the control path traffic because CoA is a control plane function.
Option B,packet-capture controlpath udp 3799, is the correct answer because it specifies capturing control plane traffic on UDP port 3799, which is the standard port for CoA messages.
Options A, C, and D are incorrect because:
Option A captures data plane traffic, not control plane traffic.
Option C'spacket-capture interprocess udp 3799does not refer to a standard command for capturing CoA messages.
Option D,tcpdump host-port 3799, does not specify the correct syntax for capturing traffic on Aruba devices.
NEW QUESTION # 66
A customer is evaluating device profiles on a CX 6300 switch. The test device has the following attributes:
* MAC address = 81:cd:93:13:ab:31
* LLDP sys-desc = iotcontroller
The test device is being assigned to the ''lot-dev'' role However, the customer requires the "lot-prod'' role be applied.
Given the configuration, what is causing the "iot-dev" role to be applied to the device'?
- A. The test device does not support CDP.
- B. An external RADIUS server is unreachable.
- C. The device-profile precedence order is not configured.
- D. The LLDP system description matches the IIdp-group configuration.
Answer: D
Explanation:
In device profile configuration, the device role is often determined by matching attributes such as MAC address, LLDP system description, and CDP information against defined conditions. The test device is being assigned the "iot-dev" role because its LLDP system description matches the 'iot-lldp' group configuration that is associated with the 'iot-dev' role.
NEW QUESTION # 67
Your customer added third-party USB dongles to the USB ports of their AOS 10 access points. The customer uses AP-615 and AP-635 Each AP is connected with a Cat 6A cable to a CX 6300F Class 4 PoE switch All APs are in the same group in HPE Aruba Networking Central and share the same configuration However, many of the dongles do not come up.
Which option will solve this issue?
- A. Replace the Class a PoE switches with Class 6 PoE switches.
- B. Create two separate service profiles in the loT tab of the Central configuration settings.
- C. Perform a "poe disable" followed by a "poe enable" for the switch ports which connect to the APs so that the APs reboot.
- D. Move the AP-635 access points to a different group in Central to configure the dongles separately from the AP-615.
Answer: A
Explanation:
USB dongles often require additional power, which may exceed the power delivery capabilities of Class 4 PoE switches. Aruba AP-615 and AP-635 are designed to work with USB dongles that require additional power for proper operation. Since the Cat 6A cable can support higher power levels, replacing the Class 4 PoE switches with Class 6 PoE switches, which can deliver higher power, should resolve the issue with the dongles not powering up.
NEW QUESTION # 68
A network administrator wants to configure an 802.1X supplicant for a wireless network that includes the following:
* AES encryption
* EAP-MSCHAPv2-based user and machine authentication
* Validation of server certificate in Microsoft Windows 10
The network administrator creates a WLAN profile and selects the Change connection settings option. Then the network administrator changes the security type to Microsoft: Protected EAP (PEAP) and enables user and machine authentication under Additional Settings.
What must the network administrator do next to accomplish the task? (Select two)
- A. Change default RC4 encryption for AES
- B. Enable server certificate validation
- C. Enable user authentication
- D. EAP-TLS-based user and machine authentication
Answer: B,C
Explanation:
Comprehensive and Detailed Explanation From Exact Extract of HPE Aruba Networking Switching:
When configuring an 802.1X supplicant in Microsoft Windows for EAP-PEAP (Protected EAP) using EAP-MSCHAPv2, both user and machine credentials can be used for authentication. The network administrator has already enabled user and machine authentication under Additional Settings, but to meet the stated requirements (AES encryption and server certificate validation), two critical steps remain:
* Enable server certificate validationThis ensures the client validates the identity of the RADIUS server (such as Aruba ClearPass or another authentication server) to prevent man-in-the-middle attacks.
It satisfies the requirement for "validation of server certificate in Windows 10".
Exact Extract:
"For EAP-PEAP with EAP-MSCHAPv2, select 'Validate server certificate' to ensure the client trusts the authentication server's identity. The server certificate must be signed by a CA trusted by the client."
* Enable user authenticationWhile both user and machine authentication are possible, user authentication must be explicitly enabled so that credentials (domain or local user) are sent after machine authentication completes. This enables the full EAP-MSCHAPv2-based user and machine authentication process.
Exact Extract:
"In EAP-PEAP properties, ensure 'Enable user authentication' is selected to authenticate both the workstation and logged-on user credentials when using EAP-MSCHAPv2." Additionally, Windows 10 uses AES encryption automatically when WPA2/WPA3-Enterprise is configured, fulfilling requirement (1). RC4 encryption is not applicable because AES is the default cipher for WPA2 Enterprise networks.
Why the Other Options Are Incorrect:
* C. EAP-TLS-based user and machine authentication:The question specifies EAP-MSCHAPv2, not EAP-TLS. EAP-TLS uses digital certificates for mutual authentication, while PEAP with EAP- MSCHAPv2 uses username and password-based credentials.
"EAP-TLS is certificate-based; PEAP-MSCHAPv2 uses password-based authentication."
* D. Change default RC4 encryption for AES:RC4 is used in older WPA or TKIP security types. When using WPA2-Enterprise, AES is automatically selected and cannot be manually overridden.
"WPA2-Enterprise (802.1X) uses AES-CCMP encryption; RC4/TKIP is not applicable to modern configurations." References of HPE Aruba Networking Switching Documents or Study Guide:
* Aruba Secure Connectivity and Authentication Guide (AOS-10) - "Configuring Windows 802.1X Supplicant for PEAP-MSCHAPv2."
* Microsoft Windows 10 Enterprise Network Configuration Guide - "PEAP with EAP-MSCHAPv2 Setup and Server Certificate Validation."
* Aruba ClearPass Deployment Guide - "Certificate Validation and EAP Methods Overview."
* Aruba WLAN Security and AAA Configuration Guide - "EAP Frameworks and Supported Encryption Methods."
NEW QUESTION # 69
Your customer is requesting a4-ciass LAN queuing model tor QoS. Following best practices, match the PHB/DSCP values to the application types.
Answer:
Explanation:
Explanation:
Best Effort and Scavenger =DF (0)Bulk and Transactional Data =AF21 (18)Multimedia Streaming =AF31 (26)Real-Time Interactive =EF (46)
NEW QUESTION # 70
You are troubleshooting a WLAN deployment with APs and gateways set up with an 802.1X tunneled SSID.
End-users are complaining that they can't connect to the enterprise SSID. Which possible AP tunnel states could be the cause of the issue? (Select two.)
- A. SM_STATE_SURVIVED
- B. SM_STATE_CONNECTED
- C. SM_STATE_SURVIVING
- D. SM_STATE_CONNECTING
- E. SM_STATE_REKEYING
Answer: C,D
Explanation:
Comprehensive and Detailed Explanation From Exact Extract of HPE Aruba Networking Switching:
In Aruba gateway/AP tunnel state reporting, the following tunnel state semantics apply:
* SM_STATE_CONNECTING - indicates the AP has received tunnel configuration/keys and is attempting to bring up the tunnel; the tunnel is not yet available for client traffic.
* SM_STATE_SURVIVING - indicates the AP is in a survival/fallback condition (for example, it did not receive a fresh tunnel key and is attempting resolution via IKE); this state reflects a problem condition that can prevent successful client connectivity.
By contrast:
* SM_STATE_CONNECTED - indicates the IPsec tunnel to the endpoint is established and available.
* SM_STATE_REKEYING - indicates a rekey operation is in progress; the session is being updated, not necessarily failed.
* SM_STATE_SURVIVED - indicates the AP completed survival procedures and the IPsec tunnel is available.
Because end-users cannot connect, the problematic states are those where the tunnel is not up in normal service: SM_STATE_CONNECTING and SM_STATE_SURVIVING.
References:* ArubaOS/ArubaOS 10 Gateway and AP Tunnel State Descriptions; Command Reference for tunnel endpoint status and state-machine definitions (section describing CONNECTING, SURVIVING, SURVIVED, CONNECTED, and REKEYING states).* Aruba Campus WLAN Design and Operations Guide; Troubleshooting AP-to-Gateway IPsec Tunnel States (tunnel state meanings and client impact).
NEW QUESTION # 71
A deployment using AP-635S is connected to a stack of CX 6300s as shown.
The output of the snow LACP interfaces shews the following:
What is causing this issue?
- A. e0 is connected to a smart rate interface, and e1 is connected to a non-smart rate interface.
- B. The AP is configured with LACP active
- C. Spanning tree and loop protect are enabled on both AP uplink ports.
- D. Each AP interface is connected to a routed-only interlace on different networks
Answer: B
Explanation:
In an Aruba deployment, if an AP's interfaces show different LACP states, it often indicates a configuration mismatch. If one interface is up and the other is blocked as shown in the output, it's likely due to both interfaces on the AP being set to LACP active mode, which is a correct setting for establishing an LACP channel with Aruba switches like the CX 6300 series.
NEW QUESTION # 72
Your customer is requesting a 4-ciass LAN queuing model tor QoS. Following best practices, match the PHB
/DSCP values to the application types.
Answer:
Explanation:
Explanation:
Best Effort and Scavenger = DF (0)
Bulk and Transactional Data = AF21 (18)
Multimedia Streaming = AF31 (26)
Real-Time Interactive = EF (46)
NEW QUESTION # 73
Refer to the exhibit.
Given the log output, which statement is true?
- A. The gateway with IP address 192.168.1.92 is offline.
- B. AP-01 cannot communicate with the HPE Aruba Networking Central tunnel orchestrator.
- C. The gateway tunnel to the AP has a path MTU issue.
- D. AP-01's tunnel to 192.168.1.92 is in a survived state.
Answer: A
Explanation:
* The show ata endpoint output lists the AP's AP Tunnel Agent (ATA) state transitions with a given gateway.
* Key state/result fields:
* CONNECTING # PROBE_TIMEOUT # INIT: the AP tries to bring up the IPSec tunnel, health probes to the gateway time out, then the state resets to INIT and retries.
* TUN_RECV_TIMEOUT: the AP stops receiving tunnel keepalives/packets from the gateway within the expected interval.
* SURVIVING indicates the AP is maintaining service with an already-up tunnel while control connectivity is impaired; it is not the state shown at the end here.
In the log, AP-01 repeatedly cycles through CONNECTING # PROBE_TIMEOUT # INIT, with intermittent TUN_RECV_TIMEOUT. This pattern is the documented symptom of the gateway being unreachable or down (no response to probes/keepalives), rather than a Central/orchestrator outage or PMTU problem.
Therefore, the correct conclusion is that the gateway at 192.168.1.92 is offline or not reachable.
* A is incorrect: the final/recurring state is not SURVIVING.
* C is incorrect: a Central/orchestrator issue would show SURVIVING (existing tunnel continues) rather than repeated probe timeouts to the gateway.
* D is incorrect: PMTU issues do not generate recurring PROBE_TIMEOUT/TUN_RECV_TIMEOUT cycles; they appear as ESP/IKE negotiation problems, not persistent probe loss.
NEW QUESTION # 74
Exhibit.
You updated your gateway to me most recent firmware However after the firmware was updated, the gateway could no longer connect to HPE Aruba Networking Central. Your corporate ITIL procedures require you to implement your backout plan. You connected a console cable to your gateway and saw the following prompt.
Cpxload#
in what order, do you need to execute the following commands to return to the previous firmware version?
Answer:
Explanation:
Explanation:
The sequence to return to the previous firmware version after an unsuccessful update would typically be:
hit any key to stop autoboot(This would prevent the system from automatically booting into the current, problematic firmware.) def_part 1(This command sets the default boot partition, which is likely where the previous working firmware is located.) bootf(This command would boot from the specified flash partition, which after the second step, would be the previous firmware.) osinfo(After the system is booted, this command could be used to confirm the firmware version now running on the gateway.)
NEW QUESTION # 75
You configured" a bridged mode SSID with WPA3-Enterprise and EAP-TLS security. When you connect an Active Directory joined client that has valid client certificates. ClearPass shows the following error.
What is needed to resolve this issue?
- A. Enable authorization in your Authentication Method.
- B. Configure ClearPass to trust the client certificate.
- C. Recreate the SSID m tunneled mode.
- D. Modify your ACX-AD authentication source to include the UPN in the search.
Answer: D
Explanation:
The error message "User not found" indicates that the authentication source, in this case, Active Directory (AD), is not able to locate the user account based on the current search parameters. This often occurs when the User Principal Name (UPN) that the client is using to authenticate is not included in the search parameters of the AD authentication source within ClearPass. By modifying the AD authentication source to include the UPN in the search, ClearPass will be able to correctly locate the user account and proceed with the authentication using the valid client certificates.
NEW QUESTION # 76
You are tasked with developing a comprehensive, flexible, and survivable zero-trust wired access network using CX 6300 switching and HPE Aruba Networking ClearPass Policy Manager. Match the scenario to the special roles to achieve your objectives.
Answer:
Explanation:
Explanation:
Scenario
Correct Role
This role is applied when a re-authentication attempt times out to ClearPass.
Critical role
This role is applied when ClearPass replies with the deny access enforcement profile.
Reject role
This role is applied when ClearPass replies with the allow access enforcement profile.
Auth-role
This role is applied when there is no match for a device profile.
Fallback role
In Aruba CX switching, when integrating ClearPass Policy Manager (CPPM) for 802.1X, MAC Authentication, or Downloadable Role-based Access, the system assigns specific roles based on AAA enforcement outcomes or network events (timeouts, mismatches, or unknown devices).
These special roles ensure network survivability and consistent zero-trust policy enforcement even if ClearPass or RADIUS communication fails.
1. Critical Role # Applied when re-authentication attempt times out to ClearPass
"When the switch cannot reach the RADIUS server during re-authentication (for example, a timeout), the switch assigns the critical-role to the authenticated client, ensuring continued network connectivity with a restricted policy."
"This role is used to maintain limited access when the RADIUS server is unreachable or times out." This ensures that devices remain minimally operational while preventing full network access - crucial for survivable network designs.
2. Reject Role # Applied when ClearPass replies with the deny access enforcement profile
"If the RADIUS response includes an Access-Reject, the switch applies the configured reject-role. This typically results in isolation or complete denial of access."
"The reject-role allows enforcement of a restrictive VLAN or ACL after authentication failure." Therefore, when ClearPass denies access, the reject role provides an explicit enforcement action.
3. Auth-Role # Applied when ClearPass replies with the allow access enforcement profile
"When the authentication succeeds and the RADIUS server returns an Access-Accept with an Aruba-User- Role attribute, the switch applies the auth-role."
"This is the default operational role for authenticated clients."
This role represents the authorized state, where the user receives full or role-based access according to ClearPass policies.
4. Fallback Role # Applied when there is no match for a device profile
"If the client fails device profiling or no match is found in the endpoint database, the switch applies the fallback-role configured for unknown devices."
"The fallback-role provides a baseline policy for unrecognized or unclassified endpoints." This ensures unknown or new devices can be placed in a limited-access posture pending classification.
References of HPE Aruba Networking Switching Documents or Study Guide:
* ArubaOS-CX Access Security Guide (AOS-CX 10.12 and later) - "Role mapping and special roles (auth-role, reject-role, fallback-role, critical-role)."
* Aruba ClearPass Policy Manager Deployment Guide - "Integration with Aruba Switch Roles and Enforcement Profile Mapping."
* Aruba Zero Trust Wired Access Design Guide - "Survivability roles for authentication failure or unreachable ClearPass."
* Aruba CX 6300 Configuration Guide - "AAA, Downloadable Roles, and Fallback/Critical Role Configuration."
NEW QUESTION # 77
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. Add the correct values for "CPPM Username" and "CPPM Password" in the authentication server configuration on HPE Aruba Networking Central
- B. Modify the shared secret on the switch to match CPPM using the "radius-server host" command
- C. Uncheck the "Dynamic Authorization" checkbox in the authentication server configuration on HPE Aruba Networking Central
- D. Add a new Enforcement Policy of type "WEBAUTH" on ClearPass and associate it with the matching service on ClearPass
Answer: A
Explanation:
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.)
NEW QUESTION # 78
A customer is running out of IP addresses in a network segment. What will happen if they add an additional IP subnet to the same VLAN?
- A. IGMP will not work in both of the subnets in the same VLAN
- B. Users can reach each other and establish PTP traffic without passing an L3 point in the same VLAN
- C. Broadcasts for the two subnets will arrive on all ports in the same VLAN
- D. This would result in a single SVI using two subinterfaces
Answer: C
Explanation:
Comprehensive and Detailed Explanation From Exact Extract of HPE Aruba Networking Switching:
On Aruba switches (AOS-CX/AOS-S), multiple IPv4 networks can be configured on the same VLAN interface (SVI) by assigning a primary address and one or more secondary addresses. The VLAN remains one Layer-2 broadcast domain; adding more IP subnets does not create subinterfaces and does not split the broadcast domain.
Exact extract:
* "A VLAN interface may be configured with a primary IP address and additional secondary IP addresses to host multiple subnets on the same Layer-2 broadcast domain."
* "A VLAN is a single broadcast domain. Broadcast and unknown unicast frames are flooded to all ports belonging to the VLAN."
* "Hosts in different IP subnets on the same VLAN still require Layer-3 routing to communicate; sharing the VLAN only means they share the same L2 broadcast domain." Therefore, when a second subnet is added to the same VLAN, broadcasts (ARP, DHCP, etc.) from devices in either subnet will be flooded to all member ports of that VLAN, making option C correct.
Options A (subinterfaces) are not used here; B is incorrect because inter-subnet traffic still needs routing; D is not categorically true-IGMP operates per VLAN with multicast routing configuration and is not inherently disabled by multiple subnets.
References of HPE Aruba Networking Switching documents or Study Guide:
* Aruba AOS-CX Interface and VLAN Configuration Guide - "Primary and secondary IP addressing on VLAN interfaces; VLANs as broadcast domains."
* Aruba AOS-CX Layer 2 Fundamentals - "Flooding behavior for broadcast/unknown frames within a VLAN."
* Aruba Campus Wired Design Fundamentals - "Multiple IP subnets on one VLAN and routing implications."
NEW QUESTION # 79
An OSPF router has learned a path to an external network by both an E1 and an E2 advertisement. Both routes have the same path cost. Which path will the router prefer?
- A. The router will prefer the E2 path.
- B. The router will use both paths equally utilizing ECMP.
- C. The router will prefer the E1 path.
- D. Both routes will be suppressed until the path conflict has been resolved.
Answer: C
Explanation:
In HPE Aruba Networking (AOS-CX and AOS-Switch) OSPF implementation, the routing behavior for external routes (Type 5 LSAs) distinguishes between two types of external advertisements:
* E1 (Type-1 external) - The total path cost is calculated as the sum of the internal cost to reach the ASBR (Autonomous System Boundary Router) plus the external cost as advertised in the LSA.
* E2 (Type-2 external) - The external cost is considered independent of the internal OSPF path cost to reach the ASBR. Thus, the metric used is only the external cost from the LSA.
When both an E1 and an E2 route exist to the same external destination, OSPF gives preference to the E1 route, regardless of metric values, because the E1 route represents a more accurate total cost to the destination (including internal OSPF cost).
Extract (as per HPE Aruba OSPF Technical Overview and AOS-CX Routing Guide):
"When both Type-1 (E1) and Type-2 (E2) external LSAs for the same destination are present, the router always prefers the Type-1 route. Type-1 routes include both internal and external costs in the total metric, while Type-2 routes use only the external cost. The E1 path is therefore considered more precise and is selected as the preferred route." This is consistent across Aruba's OSPF implementation and follows standard OSPF behavior as defined by the protocol (RFC 2328).
Therefore, when both E1 and E2 routes are available and have the same overall cost, the router will always prefer the E1 path.
References:* HPE Aruba Networking AOS-CX Routing Configuration Guide - OSPF External Route Preference (Section: OSPF External LSAs).* HPE Aruba Certified Switching Professional (ACSP) Study Guide - OSPF Route Selection and External Type Behavior.* HPE ArubaOS-Switch Management and Configuration Guide - OSPF External Route Types (E1 vs E2).
NEW QUESTION # 80
Which command would allow you to verify receipt of a CoA (Change of Authorization) message on an AOS-10 Gateway?
- A. packet-capture interprocess udp 3799
- B. tcpdump host-port 3576
- C. packet-capture controlpath udp 3799
- D. diag utilities tcpdump host-port 3576
Answer: C
Explanation:
Comprehensive and Detailed Explanation (Verified Extract from HPE Aruba Networking AOS-10 Gateway Documentation) The Change of Authorization (CoA) message is a RADIUS-based control packet typically sent by ClearPass Policy Manager or another RADIUS server to modify client authorization dynamically after authentication.
In ArubaOS 10, CoA and Disconnect-Request (DM) messages use UDP port 3799 and are received on the control path of the gateway, not the datapath.
HPE Aruba AOS-10 documentation specifies:
"Use the command packet-capture controlpath udp 3799 on the gateway to verify that CoA packets are being received and processed on the control plane."
"The controlpath capture displays inbound CoA or DM messages received from RADIUS servers such as ClearPass." Command breakdown:
packet-capture controlpath udp 3799
* controlpath # Captures control-plane traffic (used for management protocols like RADIUS, CoA, CAPWAP, etc.)
* udp 3799 # Filters only CoA/DM packets
Why Others Are Incorrect:
* A. interprocess captures internal gateway processes, not RADIUS packets.
* C. diag utilities tcpdump is used in AOS 8.x, not AOS 10.
* D. tcpdump host-port 3576 uses the wrong port; CoA uses UDP 3799, not 3576 (which is for standard RADIUS authentication).
# Final Verified answer: B. packet-capture controlpath udp 3799
# Reference Sources (HPE Aruba Official Materials):
* Aruba AOS-10 Gateway Troubleshooting Guide - Control Path Packet Capture Commands
* Aruba ClearPass and AOS Integration Guide - RADIUS CoA Port (UDP 3799)
* Aruba Certified Mobility Professional (ACMP) Study Guide - CoA and Disconnect Message Verification
NEW QUESTION # 81 
A network administrator attempts to improve multicast traffic flow and performs some packet captures for validation. What can the network administrator conclude from the results?
- A. The capture taken after optimization does not show a packet length because Multicast Transmission Optimization was configured.
- B. The type field remains consistent because Dynamic Multicast Optimization (DMO) was configured.
- C. The data rate increased from 6 Mbps to 300 Mbps because Broadcast Multicast Optimization (BCMCO) was configured.
- D. The data rate increased from 6 Mbps to 300 Mbps because Dynamic Multicast Optimization (DMO) was configured.
Answer: D
Explanation:
The packet decode excerpt shows a QoS Data frame, not a multicast-control low-rate frame.
Frame control flags indicate:
* Subtype: QoS Data # This is unicast, not broadcast/multicast
* From DS bit = 1, To DS bit = 0 # Wireless unicast from AP to client
* High-rate MCS data present # Indicates optimized transmission speed
This behavior aligns directly with Dynamic Multicast Optimization (DMO).
Aruba DMO Overview - Official Behavior
ArubaOS Wi-Fi optimization guides state:
"Dynamic Multicast Optimization converts multicast packets into unicast transmissions and sends them using the highest supported data rate, improving delivery reliability and efficiency." This means:
Before DMO
After DMO
Multicast sent at lowest basic rate (e.g., 6 Mbps)
Converted to unicast # can use high PHY rates (e.g., 300 Mbps+)
High drop probability
Reliable delivery
Poor performance
Optimized throughput
The packet remaining a Data/QoS Data subtype is correct - DMO does not change the 802.11 frame Type field; it changes transmission handling and rate control.
Why the Other Options Are Incorrect
Option
Why Incorrect
A BCMCO does not exist - incorrect feature name
B Type consistency is not the key validation point - rate increase is
D Packet length always appears in frame decode; optimization never hides it
# Final Verified answer: C
The data rate increased from 6 Mbps to 300 Mbps because Dynamic Multicast Optimization (DMO) was configured.
NEW QUESTION # 82
Exhibit.
A university runs its own TV station in the city The IT department deploys a multimedia server so the TV productions can be sent out to the entire campus over the IP network using multicast-based communications in order to improve the bandwidth consumption. PlM sparse Mode and IGMP snooping features are enabled.
When wireless users join the multicast groups, all users connected to the same WLAN experience poor network performance. However, wired users are not affected in this way While troubleshooting the network administrator saves the packet captures shown in the exhibit and concludes that all users even those not joining the multicast group, receive the same multicast flow at slow speeds.
Which features should the network administrator enable to fix the problem?
- A. Dynamic Multicast Optimization and Multicast Transmission Optimization
- B. UCC QoS correction and Multicast Transmission Optimization
- C. Dynamic Multicast Optimization and UCC QoS correction
- D. ARP broadcast conversion into unicast and Multicast Transmission Optimization
Answer: A
Explanation:
Dynamic Multicast Optimization (DMO) and Multicast Transmission Optimization are features that can help address issues with multicast traffic in wireless environments. DMO optimizes the way multicast traffic is transmitted over the air by converting multicast streams into unicast streams to the clients that need them. This reduces unnecessary traffic for clients that have not subscribed to the multicast group and can improve overall network performance. Multicast Transmission Optimization adjusts the transmission rate of multicast frames to ensure they are sent at optimal speeds, addressing the issue of multicast flow being received at slow speeds by all users.
NEW QUESTION # 83
You are troubleshooting a WLAN deployment with APs and gateways set up with an 802.1X tunneled SSIO.
End-users are complaining that they can't connect to die enterprise SSID. Which possible AP tunnel states could be the cause of the Issue? (Select two.)
- A. SM_STATE_SURVIVED
- B. SM_STATE_CONNECTED
- C. SM_STATE_RE KEYING
- D. SM_STATE_SURVIVING
- E. SM_STATE_CONNECTING
Answer: C,E
Explanation:
When troubleshooting a WLAN with 802.1X tunneled SSID issues, AP tunnel states indicate the status of the connection between the AP and the gateway/controller. The states 'SM_STATE_REKEYING' and
'SM_STATE_CONNECTING' could indicate transitional states where the connection has not been fully established, hence users might face issues connecting to the SSID. 'SM_STATE_REKEYING' implies that the AP is in the process of re-establishing encryption keys, while 'SM_STATE_CONNECTING' indicates that the AP is trying to establish a connection with the controller or gateway. These states could lead to temporary connectivity issues until the state transitions to 'SM_STATE_CONNECTED'.
NEW QUESTION # 84
A network technician racked up two 9240 mobility gateways in a single cluster that will be terminating 1700 APs in a medium-sized branch office Next, the technician cabled the gateways with two SFP28 Direct Attach Copper (DAC) cables, distributed between a two-member core switching stack and powered them up.
What must the network administrator do next regarding the gateway configuration to ensure maximum wired bandwidth utilization?
- A. Manually set 25Gbps speeds on all ports.
- B. Map two physical ports to a port channel on each gateway.
- C. Make an ports trunk interfaces and permit data VLANs
- D. Disable the spanning tree and allocate unique VLANs to each port.
Answer: B
Explanation:
To maximize wired bandwidth utilization, especially when multiple APs are terminating on mobility gateways, it's best practice to aggregate physical ports into a port channel. This provides redundancy and increased bandwidth by combining the throughput of multiple ports.
NEW QUESTION # 85
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