Pass the HP Aruba Certified Design Professional (ACDP) V1 HPE6-A47 Questions and answers with CertsForce

This answer is correct because it matches the scenario for which the Aruba backplane stacking technology is designed. Aruba backplane stacking technology allows up to 10 switches to be interconnected using high-speed backplane cables, creating a single logical device with a single IP address and configuration. This simplifies the management and operation of the network, as well as the redundancy design, as the stack can operate in ring or chain topology and provide fast failover in case of link or switch failure. This technology is suitable for customers who need to deploy a pair of aggregation switches in the same closet, as it reduces the number of devices and links to manage, and provides high availability and scalability for the network.

The other options are incorrect because:

B. The customer needs to simplify the deployment of core switches which are located in different closets for redundancy purposes. This scenario is not suitable for Aruba backplane stacking technology, as it requires the switches to be physically close to each other and connected with backplane cables. A better option for this scenario would be to use Aruba Virtual Switching Framework (VSF) technology, which allows up to twoswitches to be interconnected using standard Ethernet links, creating a virtual switch that can span across different closets or racks.

C. The customer needs to expand the network and make it possible for the current core switches to support more MAC forwarding and ARP entries. This scenario is not suitable for Aruba backplane stacking technology, as it does not increase the MAC or ARP table size of the switches. The MAC and ARP table size is determined by the hardware specifications of each switch model, and stacking them together does not change that. A better option for this scenario would be to upgrade the core switches to a higher-end model that supports more MAC and ARP entries, or to segment the network into smaller subnets to reduce the MAC and ARP traffic.

D. The customer needs to deploy a switch at a branch office and have the switch automatically discover and join the network stack at the main office. This scenario is not suitable for Aruba backplane stacking technology, as it requires the switches to be on the same LAN and connected with backplane cables. A better option for this scenario would be to use Aruba Central, which is a cloud-based management platform that allows remote provisioning and monitoring of Aruba switches and other devices. Aruba Central can automatically discover and join the switch to the network, and apply the configuration and policies from the main office.

References:

Aruba 2930M Switch Series - Data sheet)

ArubaOS-Switch Virtual Switching Framework - Configuration guide)

Aruba Central - Data sheet)

it meets the customer’s requirements for wired network upgrade. By combining the switches in each Building 2 closet as a Virtual Switching Framework (VSF) fabric, the architect can reduce the number of logical devices within the network, simplifying management and reducing complexity, aligning with the goal of flattening architecture. Establishing two 10 GbE connections to the core per fabric ensures redundancy and resilience, maintaining connectivity even if one link fails, without necessitating additional cabling. This also provides sufficient bandwidth and scalability for the network traffic.

The other options are incorrect because:

A. Using two additional 2930F switches to act as an aggregation layer for Building 2 adds another layer of devices and complexity to the network, contradicting the goal of flattening architecture. It also requires additional cabling and ports to connect the switches to the core and the access layer.

B. Connecting each Building 2 switch directly to the core on a single fiber strand through the use of SFP±SR transceivers does not provide redundancy and resilience, as one link failure would disconnect the switch from the core. It also limits the bandwidth and scalability of the network, as each switch would have only one 10 GbE connection to the core.

D. Extending additional fiber between the buildings so that each Building 2 switch can have a direct 10 GbE connection to the core requires recabling, which the customer wants to avoid. It also increases the cost and complexity of the network, as more fiber strands and ports would be needed.

References:

Aruba 2930M Switch Series - Data sheet)

Aruba Validated Reference Design: Campus Wired LAN - Chapter 3)

ArubaOS-Switch Virtual Switching Framework - Configuration guide)

Auditoriums are challenging environments for wireless design, as they often have a large number of users and devices in a relatively small area, creating high demand for bandwidth and capacity. To provide adequate RF coverage and performance, auditoriums typically require a high-density AP design, which involves deploying more APs than usual, using directional antennas, reducing transmit power, and selecting non-overlapping channels12. A high-density AP design can also help mitigate interference from other sources, such as Bluetooth devices, which operate in the 2.4 GHz band3. Auditoriums do not necessarily require the use of 80 MHz channels or DFS channels, as these options depend on the availability and regulation of the spectrum, as well as the trade-off between throughput and channel reuse . References:

1: High Density Wi-Fi Design Principles - Aruba

2: Auditorium | WBDG - Whole Building Design Guide

3: Bluetooth and Wi-Fi Coexistence Issues and Solutions for the 2.4 GHz ISM Band - Aruba

[4]: 802.11ac Channel Planning - Aruba

[5]: Dynamic Frequency Selection (DFS) - Aruba

According to the Aruba documentation, Aruba AirWare Clarity is a feature that proactively analyzes end-users’ quality of experience by providing enhanced monitoring capabilities for critical network services, such as time and response failures for a mobile device to associate with a Wi-Fi radio, authenticate to a RADIUS server, obtain an IP address through DHCP, and resolve names for DNS services. This gives IT staff end-to-end visibility into problems before they escalate as metrics are monitored in real-time, and also captured through on-demand or scheduled testing for predictive insight. By assessing the times for clients to obtain DHCP and DNS services, Clarity helps staff diagnose non-WiFi related issues that may affect the network performance and user experience.

References:

Clarity - Aruba

Clarity - Aruba

 This answer is correct because it meets the customer’s requirements for wired authentication and traffic forwarding. By assigning wired users to different VLANs from wireless users, the architect can ensure that the wired traffic is not tunneled to the MCs, but forwarded locally on the access layer switches. This reduces the load on the MCs and the network bandwidth. By using port or role assignments on the access layer switches, the architect can also implement 802.1X authentication without tunnelled node, which enables user access control and dynamic VLAN assignment based on user identity and device type. By extending the VLANs to the core, the architect can ensure that the wired users can reach the data center and other network resources through the Layer 3 switch connected to the firewall. References:

Aruba 2930M Switch Series - Data sheet)

Aruba ClearPass Policy Manager - Data sheet)

ArubaOS-Switch Wired Access with ClearPass - Configuration guide)

The guideline for defining another VLAN for wireless devices should be based on the employee roles, with a different VLAN for each role or department. This approach allows for better control and management of network resources. It also enhances security by segregating network traffic based on roles or departments. This is particularly useful in large organizations where different departments may have different network requirements and security levels12.

References:

Configuring VLANs - Aruba

TECH BRIEF SINGLE VLAN DESIGN FOR WIRELESS LAN - Aruba

According to the Designing Aruba Solutions course, dedicated Air Monitors (AMs) are APs that are configured to scan all channels for wireless threats and perform wireless intrusion prevention system (WIPS) functions. One of the advantages of using dedicated AMs over APs that are doing WIPS in AP mode (hybrid) is that AMs can implement wireless containment on any channel on which they detect a threat without affecting the service of legitimate clients. Wireless containment is a technique that prevents rogue APs or clients from communicating with the network by sending deauthentication or disassociation frames to them. However, if an AP that is serving clients performs wireless containment on a different channel, it will have to switch channels frequently, which will degrade the performance and user experience of the clients. Therefore, dedicated AMs are recommended for customers who need effective and efficient wireless containment without compromising client service.

References:

Designing Aruba Solutions, Rev. 20.11, Module 5: Aruba Security Design, page 5-13

Aruba Validated Reference Design: Wireless Intrusion Prevention System, page 10

 In local mode, the IAP cluster at the branch office has a local subnet and the master IAP of the cluster acts as the DHCP server and gateway for clients. The local mode provides access to the corporate network using the inner IP of the IPsec tunnel. The local mode is recommended for this scenario because it allows the branch office to remain functional even if the link to the main office fails, as the clients can still obtain IP addresses and access local resources. The local mode also avoids the need for additional routing or switching configuration on the MC or the branch office network12. References:

1: Understanding IAP-VPN Architecture - Aruba

2: IAP-VPN Forwarding Modes - Aruba

The Virtual Switching Framework (VSF) is a technology that allows two or more Aruba switches to operate as a single logical device, providing high availability, simplified management, and increased performance. VSF is supported on Aruba 5400R zl2 switches, which are modular switches that can accommodate different types of line cards and power supplies1.

The VSF fabric requires two types of connections between the member switches: VSF links and VSF ports. VSF links are the physical connections that carry the VSF control and data traffic, while VSF ports are the logical interfaces that bundle the VSF links into a single logical link. VSF links can be either 10 GbE or 40 GbE, and VSF ports can be either 10 GbE or 40 GbE1.

To create a VSF fabric with two 5406R zl2 switches, the architect needs to ensure that the switches have the compatible modules, transceivers, and cables for the VSF links and ports. According to the ArubaOS-Switch Management and Configuration Guide1, the following requirements apply for the VSF fabric:

The switches must have the same chassis model, the same number and type of modules, and the same firmware version.

The switches must have at least one v3 module in slot A or B. The v3 modules are the ones with the letter “M” in the part number, such as J9990A, J9991A, and J9992A. The v2 modules are the ones with the letter “A” in the part number, such as J9534A, J9535A, and J9536A.

The switches must have the same type of transceivers and cables for the VSF links. The supported transceivers are the Aruba 10G SFP+ LC SR, the Aruba 10G SFP+ LC LR, the Aruba 40G QSFP+ LC SR4, and the Aruba 40G QSFP+ MPO SR4. The supported cables are the Aruba 10G SFP+ to SFP+ 1m DAC Cable, the Aruba 10G SFP+ to SFP+ 3m DAC Cable, the Aruba 40G QSFP+ to QSFP+ 1m DAC Cable, and the Aruba 40G QSFP+ to QSFP+ 3m DAC Cable.

Based on the exhibit, the architect has planned to use the Aruba 40G QSFP+ to QSFP+ 1m DAC Cable (JH234A) for the VSF links, which is a supported option. However, the architect has also selected the Aruba 24p 10GBASE-T v2 zl Module (J9536A) and the Aruba 20p 10GbE SFP+ v2 zl Module (J9535A) for the switches, which are not compatible with the VSF fabric. The architect should change these v2 modules to v3 modules, such as the Aruba 24p 10GBASE-T v3 zl2 Module (J9996A) and the Aruba 20p 10GbE SFP+ v3 zl2 Module (J9990A), to meet the VSF requirements.

The other options are not issues with the plan. Adding two QSPF+ MP0 SR4 transceivers (A) is not necessary, as the DAC cable already provides the 40 GbE connection for the VSF links. Adding stacking modules and cables © is not required, as the VSF fabric does not use the traditional stacking technology. Changing the power supply type (D) is not relevant, as the VSF fabric does not impose any restrictions on the power supply type.

References: 1: ArubaOS-Switch Management and Configuration Guide - Aruba, Chapter 12: Virtual Switching Framework, pages 219-227.