Pass the HP HPE Product Certified - Aruba Data Center Network Specialist HPE2-W09 Questions and answers with CertsForce

 ArubaOS-CX switches are designed for enterprise campus, aggregation, and data center networking use cases1. ArubaOS-CX switches support a leaf-spine topology, which is a two-layer network architecture that provides high performance, scalability, and reliability for data center networks2. Aruba CX 8325 switches are compact 1U switches that offer high density and high speed connectivity for both leaf and spine switches3. Aruba CX 8325 switches can support up to 32 ports of 100GbE or 48 ports of 25GbE and 8 ports of 100GbE3. For a data center that requires 64 leaf switches, Aruba CX 8325 switches can be a good choice for both the leaf and spine switches, as they can provide enough bandwidth and port density for the network traffic3. Therefore, this is a correct positioning of ArubaOS-CX switches in the data center, and the correct answer is yes. For more information on ArubaOS-CX switches and data center solutions, refer to the Aruba Data Center Network Specialist (ADCNS) certification datasheet and the Aruba CX Switch Series datasheets3 .

Deploying Aruba CX 8400 switches as core switches for very large three-tier data center networks is how you should position switches in the ArubaOS-CX portfolio for data center networks. ArubaOS-CX is an operating system that provides advanced features and automation capabilities for data center networks1. It runs on various switch models that are designed for different roles and scenarios in the data center1. Aruba CX 8400 switches are modular switches that offer high performance, scalability, and reliability for the core layer of very large three-tier data center networks1. The statement is true because it correctly describes how to position Aruba CX 8400 switches in the ArubaOS-CX portfolio for data center networks.

Headend replication is a method of handling BUM traffic in VXLAN networks without EVPN, where the ingress VTEP replicates every BUM packet and sends them as a separate unicast to the remote egress VTEPs in the same VNI1. This avoids the need for multicast routing in the underlay network, but it can increase the load on the ingress VTEP. Therefore, this correctly describes how the VTEPs handle VXLAN traffic forwarding without EVPN.

Deploying Aruba 83xx switches as data center leaf switches is not how you should position switches in the ArubaOS-CX portfolio for data center networks. The Aruba 83xx switches are designed for data center spine or core roles, and they provide high performance, scalability, and resiliency. The Aruba 63xx switches are more suitable for data center leaf roles, and they provide high density, low latency, and advanced features such as VSX and EVPN2.

Enhanced Transmission Selection (ETS) is a network scheduling algorithm that allows the switch to assign different priority and bandwidth values to different traffic classes1. This can be useful for transmitting traffic to servers that have different requirements for latency, jitter, or throughput. For example, ETS can prioritize voice or video traffic over data traffic, or allocate more bandwidth to backup or replication traffic. ETS is configured using the Data Center Bridging Exchange (DCBx) protocol, which advertises the configuration to peer devices2. Therefore, implementing ETS on an ArubaOS-CX switch is a valid use case for enabling the switch to assign the correct priority and bandwidth to traffic that it transmits to servers.

A frame with destination MAC address, 00:50:56:15:16:28, arrives with a VLAN 10 tag on 1/1/1 on Switch-1. Switch-1 encapsulates the frame with VXLAN and an IP header destined to 192.168.1.2 is a correct explanation of how the switch handles the traffic. Switch-1, Switch-2, and Switch-3 are ArubaOS-CX switches that use VXLAN and EVPN to provide Layer 2 extension over Layer 3 networks. VXLAN is a feature that uses UDP encapsulation to tunnel Layer 2 frames over Layer 3 networks using VNIs. EVPN is a feature that uses BGP to advertise MAC and IP addresses of hosts connected to VTEPs. Switch-1 receives a frame with destination MAC address, 00:50:56:15:16:28, which belongs to VM-2 on Switch-3. Switch-1 learns from EVPN that VM-2 is reachable through VTEP 192.168.1.2, which is Switch-3’s loopback interface. Switch-1 encapsulates the frame with VXLAN and an IP header destined to 192.168.1.2 and sends it over the underlay network1.

ARP and ND Suppression are features of ArubaOS-CX that reduce the broadcast traffic on EVPN VXLAN networks1. ARP and ND Suppression enable the switch to reply to ARP and ND requests with information present in the local ARP and neighbor cache, instead of flooding them to all VTEPs1. This reduces the bandwidth consumption and improves the network performance1. ARP-Suppression and ND-Suppression can be enabled or disabled independently1. They do not have to be enabled together1. Therefore, this statement about ARP and ND Suppression is false, and the correct answer is no. For more information on ARP and ND Suppression, refer to the Aruba Data Center Network Specialist (ADCNS) certification datasheet3 and the EVPN VXLAN Guide for your switch model1.

The Virtual Switching Extension (VSX) is a high availability solution that provides industry-leading performance and simplicity for campus and data center networks1. VSX does not implement a single control plane for the core fabric, but rather a dual control plane that allows independent software upgrades and configuration changes on each switch2. VSX also provides active-active forwarding and load balancing across both switches, eliminating the need for Spanning Tree Protocol (STP) or other loop prevention mechanisms2. Therefore, this is not a use case for implementing VSX at the core. Reference: https://www.arubanetworks.com/assets/tg/TB_VSX.pdf

The exhibit shows a network topology where Switch-1 and Switch-2 are part of a Virtual Switching Extension (VSX) fabric, and the router runs OSPF on LAG 100, which is a Layer 3 LAG. The question asks how to control how core-to-access traffic is forwarded, which means how the router chooses between the two links to Switch-1 and Switch-2. To force the router to use both links, ensuring that active gateway is enabled on LAG 100 on both Switch-1 and Switch-2 is not the correct solution. Active gateway is a feature that allows both VSX members to act as the default gateway for downstream devices, using a common virtual MAC address. Active gateway does not affect how upstream devices, such as the router, forward traffic to the VSX members1. To force the router to use both links, the correct solution is to configure equal-cost multi-path (ECMP) in OSPF on the router. ECMP is a feature that allows a router to load balance traffic across multiple paths with the same cost. ECMP can be configured using the maximum-paths command and specifying how many equal-cost paths the router should use2. Therefore, this does not correctly explain how to control how core-to-access traffic is forwarded.

NetEdit is a network management tool that allows you to configure, monitor, and troubleshoot ArubaOS-CX switches. NetEdit can send notifications of changes in network conditions to other services, such as email, using methods that define the service type and credentials. However, NetEdit does not use its internal email server to send notifications. NetEdit requires an external SMTP server to send email notifications, and the SMTP server address, port, username, and password must be configured in the email method1. Therefore, this does not correctly describe NetEdit’s notification capabilities.