HPE6-A47 Exam Dumps - Designing Aruba Solutions

The maximum bandwidth possible between the aggregation and core layers using 8 strands of OM4 Multi-Mode fiber can be up to 200 Gbps1. This is because each strand of OM4 fiber can support up to 25 Gbps of bandwidth, and with 8 strands, the total bandwidth can reach up to 200 Gbps1. However, the actual bandwidth can be influenced by various factors such as the quality of the fiber, the type of transceivers used, and the distance between the aggregation and core layers1.

References:

• What is IP and Ethernet aggregation? - Ciena
• Aruba 5400R zl2 Switch Series Data Sheet
• Aruba 5400R zl2 Switch Series Installation and Getting Started Guide
• ArubaOS-Switch and ArubaOS-CX Transceiver Guide

Jitter is the variation in the delay of packets arriving at the destination. It is caused by network congestion, routing changes, or other factors that affect the transmission quality. Jitter can affect the quality of VoIP calls, as it can cause gaps, distortion, or echo in the audio. According to the Aruba Validated Reference Design for Voice and Video over Wi-Fi, the recommended maximum jitter for VoIP calls is 30 ms. Therefore, a jitter of 100 ms would typically cause a poor experience for users.

The other options are incorrect because:

• A. The packet loss is the percentage of packets that are lost or discarded during transmission. Packet loss can affect the quality of VoIP calls, as it can cause missing or corrupted audio. However, according to the Aruba Validated Reference Design for Voice and Video over Wi-Fi, the recommended maximum packet loss for VoIP calls is 1 percent. Therefore, a packet loss of 0.3 percent would not typically cause a poor experience for users.
• B. The throughput is the amount of data that can be transferred per unit of time. Throughput can affect the quality of VoIP calls, as it determines the bandwidth available for the audio. However, according to the Aruba Validated Reference Design for Voice and Video over Wi-Fi, the typical throughput for VoIP calls is 64 Kbps. Therefore, a throughput of 67 Kbps would not typically cause a poor experience for users.
• C. The latency is the delay between the sender and the receiver of packets. Latency can affect the quality of VoIP calls, as it can cause delays or out-of-sync audio. However, according to the Aruba Validated Reference Design for Voice and Video over Wi-Fi, the recommended maximum latency for VoIP calls is 150 ms. Therefore, a latency of 100 ms would not typically cause a poor experience for users.

References:

• Aruba Validated Reference Design: Voice and Video over Wi-Fi - Chapter 2)
• Aruba Certified Design Professional Official Certification Study Guide (HPE6-A47) - Chapter 7)

 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 switch needs to support PoE+ for this deployment. PoE+ stands for Power over Ethernet Plus, and it is a technology that allows the switch to provide both data and power to the connected devices over a single Ethernet cable. This eliminates the need for separate power sources or adapters for the devices, and simplifies the installation and management of the network. PoE+ can provide up to 30 watts of power per port,which is sufficient for the Aruba 320 Series APs, which have a maximum power consumption of 20 watts. PoE+ also supports 1 GbE connectivity, which meets the customer’s requirement.

The other options are not relevant for this deployment:

• Option B is incorrect because LACP is not a feature that the switch needs to support for this deployment. LACP stands for Link Aggregation Control Protocol, and it is a protocol that allows multiple physical links to be combined into a single logical link, providing higher bandwidth and redundancy. However, the architect plans to connect each AP with one Ethernet port to the switch, so there is no need for link aggregation in this scenario.
• Option C is incorrect because port channel is not a feature that the switch needs to support for this deployment. Port channel is another term for link aggregation, which is not required for this scenario, as explained above.
• Option D is incorrect because Smart Rate is not a feature that the switch needs to support for this deployment. Smart Rate is a technology that allows the switch to provide multi-gigabit Ethernet speeds (up to 10 GbE) and PoE+ to the connected devices, depending on the cable type and length. However, the customer only wants to support at least 1 GbE connectivity, which can be achieved with PoE+ and CAT6 cable, without the need for Smart Rate.

References:

• Aruba 320 Series Access Points Data Sheet)
• ArubaOS-Switch and ArubaOS-CX Transceiver Guide)
• Aruba Certified Design Professional Official Certification Study Guide (HPE6-A47))

The correct answer is option C, 20-25. This is because a general rule of thumb for 802.11ac wireless deployment is to have one AP for every 200 square meters (approximately 2,000 square feet) of coverage area. This assumes a moderate user density and application demand. Therefore, for a coverage area of 4,645 square meters (approximately 50,000 square feet), the architect should have in mind about 23 APs (4,645 / 200 = 23.225). This number can be adjusted based on the actual site survey and VisualRF plan, but it serves as a good starting point. References: The information can be referenced from the official HPE documents and learning materials available on HPE Press and Aruba Networks. Specifically, it aligns with the objectives outlined in Chapter 4: Wireless LAN Design, where the AP count estimation and site survey methods are discussed. Designing Aruba Solutions Official Certification Study Guide Aruba Mobility Fundamentals Guide