Vce HPE6-A47 Questions Latest

This is a routed link, meaning you should only have one VLAN assigned to the link. Obvious since VLANs are terminated at a layer 3 boundary, but also right out of the curriculum.

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 5: Wired Network Design, where the VSF and VLAN design considerations are discussed. Designing Aruba Solutions Official Certification Study Guide ArubaOS-Switch and ArubaOS-CX VSF Configuration Guide

802.1X authentication without tunnelled node is a form of port-based network access control that uses the Extensible Authentication Protocol (EAP) to authenticate users and devices on a wired network. This form of authentication provides several benefits, such as:

• It enables user access control and ensures only authorized users connect. This prevents unauthorized access to the network and its resources, and enhances security and compliance.
• It allows dynamic assignment of VLANs and roles based on user identity and device type. This simplifies network management and improves user experience.
• It supports multiple authentication methods, such as certificates, passwords, tokens, or biometrics. This provides flexibility and choice for users and administrators.
• It integrates with Aruba ClearPass Policy Manager (CPPM) for centralized policy enforcement and visibility. This enables granular control and monitoring of wired user traffic and devices. References:
• Aruba 2930M Switch Series - Data sheet)
• Aruba ClearPass Policy Manager - Data sheet)
• ArubaOS-Switch Wired Access with ClearPass - Configuration guide)

To route at the core and extend some of the same VLANs in different buildings, the architect should recommend creating a backplane stack at the aggregation layer and a VSF fabric at the core. A backplane stack is a logical switch that combines multiple physical switches into a single unit, using dedicated stacking cables or ports. A VSF fabric is a virtual switch that combines multiple physical switches into a single unit, using standard Ethernet links. Both technologies provide high availability, scalability, and simplified management for the network12.

By creating a backplane stack at the aggregation layer, the architect can reduce the number of routing interfaces and routing protocols needed at the core layer, as well as simplify the configuration and maintenance of the aggregation switches. By creating a VSF fabric at the core layer, the architect can enable Layer 2 connectivity across different buildings, as well as provide redundancy and load balancing for the core switches. The VSF fabric can use Multi-Chassis Link Aggregation (MC-LAG) to extend the same VLANs to different aggregation stacks, without creating loops or blocking ports3.

The other options are not suitable for the customer’s requirements. Implementing broadcast filtering on switch-to-switch links across all of the buildings would not enable Layer 2 connectivity across different buildings, as it would prevent the propagation of Layer 2 control traffic, such as Spanning Tree Protocol (STP) and VLAN Trunking Protocol (VTP). Combining all switches in the aggregation layer and core into a single backplane stack would not be feasible, as it would require compatible switches and sufficient stacking ports or cables, as well as create a single point of failure for the entire network. Using VRRP on the core and aggregation switches, with the aggregation switches acting as standby, would not eliminate the routing at the aggregation layer, as it would still require the aggregation switches to participate in the routing process and maintain routing tables.

References:

• ArubaOS-Switch Stacking Guide
• ArubaOS-Switch Virtual Switching Framework Configuration Guide
• Aruba Validated Reference Design: Campus Wired LAN

The transceivers that the architect should recommend for each pair of switches are two QSPF+ MPO. This option would provide 40 Gbps bandwidth per link, which is enough to meet the customer requirement of 80 Gbps for the link aggregation. The QSPF+ MPO transceivers use a single multi-fiber connector that can support up to 12 fibers, which is compatible with the customer’s existing OM4 multi-mode fiber infrastructure. The QSPF+ MPO transceivers also support distances up to 100 meters, which is sufficient for the customer’s inter-building connections.

The other options are not optimal for the customer requirement because they either provide insufficient bandwidth or require additional fiber strands. Two QSPF+ BiDi transceivers would provide only 20 Gbps bandwidth per link, which is half of the customer requirement. Eight SFP+ LR or SR transceivers would provide 80 Gbps bandwidth per link, which is more than the customer requirement, but they would also require eight fiber strands per link, which is more than the customer’s available fiber infrastructure. References:

• Aruba Transceiver and Cable Data Sheet (Aruba Networks)
• Designing Aruba Solutions Study Guide (HPE Press)