HPE2-W09 Online Practice Questions and Answers

Correct Answer: A

Switch-2 waits a period called the link-up delay before it enables Switched Virtual Interfaces (SVIs) on its VSX LAGs is a true statement about what happens when Switch-2 experiences a power failure while Switch-1 remains up and then recovers. Switch- 1 and Switch-2 are ArubaOS-CX switches, which are part of a Virtual Switching Extension (VSX) fabric. VSX is a feature that provides active-active forwarding and redundancy for ArubaOS-CX switches. The link-up delay timer defines how long a VSX node waits before advertising link state changes to its peer node. This allows the node to synchronize its MAC forwarding, ARP, and routing tables with its peer node before sending or receiving traffic on the newly activated link1.

Correct Answer: B

The ArubaOS-CX software is based on the ArubaOS-Switch software and adds data center features is not a correct description of the ArubaOS-CX architecture. The ArubaOS-CX software is a new operating system that is designed for data center and campus networks. It is not based on the ArubaOS-Switch software, which is used for legacy campus switches. The ArubaOS-CX software provides advanced features such as VSX, EVPN, NAE, REST APIs, etc1.

Correct Answer: A

Connecting multiple data centers at Layer 2 while minimizing the number of dark fiber connections required is a use case for deploying Ethernet Ring Protection Switching (ERPS). ERPS is a feature that provides loop prevention and fast convergence for Layer 2 networks that use ring topologies. ERPS can be used to connect multiple data centers at Layer 2 using fewer fiber connections than traditional mesh topologies1.

Correct Answer: A

Different switches have different limitations for the number of NAE scripts, monitors, and agents supported is a correct description of Network Analytics Engine (NAE) limitations on ArubaOS-CX switches. NAE is a feature that provides automation and analytics for managing ArubaOS-CX switches. NAE scripts are scripts that run on switches and collect data from various sources. NAE monitors are rules that define conditions and actions for NAE agents. NAE agents are instances of NAE scripts and monitors that run on switches. Different switches have different limitations for the number of NAE scripts, monitors, and agents supported depending on their hardware resources1.

Correct Answer: A

A schedule profile is a feature of ArubaOS-CX that determines the order and service of queues for transmission123. A schedule profile must be configured on every interface at all times23. The switch supports three scheduling algorithms: Guaranteed Minimum Bandwidth (GMB), Strict, and Strict EQS23. Strict scheduling gives absolute priority to a queue over other queues, regardless of the bandwidth allocation23. If the profile mixes strict priority scheduling with another scheduling algorithm, the strict priority queue must be the highest numbered queue23. Therefore, this is a rule for configuring schedule profiles on an ArubaOS-CX switch, and the correct answer is yes. For more information on schedule profiles and QoS, refer to the Aruba Data Center Network Specialist (ADCNS) certification datasheet1 and the QoS Guide for your switch model23.

Correct Answer: B

The solution is incorrect because Switch-1 and Switch-2 implement VXLAN without EVPN, which means they do not have a control plane to exchange MAC addresses. Therefore, the first time that Server 1 communicates with Server 3, it sends an ARP request to resolve Server 3's IP address, not MAC address. The ARP request is encapsulated in a VXLAN header and sent to the VTEP of Switch-2, which decapsulates it and forwards it to Server 3.

Correct Answer: B

A layer 2 VLAN is a single broadcast domain that works on the data link layer

1.

It cannot be assigned an IP address or attached to a VRF. A VRF requires a layer 3 interface that works on the network layer and can perform routing between different VLANs

2.

A layer 2 VLAN can only communicate within itself, not with other VLANs or routing domains1.

Correct Answer: A

On Switch-1, set 192.168.1.3 as a peer IP address in the VNI 5020 context is part of the process for setting up VXLAN to meet the requirements of enabling servers to be part of the same VXLANs and VNIs as shown in the exhibit. Switch-1,

Switch-2, and Switch-3 are ArubaOS-CX switches that use VXLAN to provide Layer 2 extension over Layer 3 networks without EVPN. VXLAN is a feature that uses UDP encapsulation to tunnel Layer 2 frames over Layer 3 networks using

VNIs. To set up VXLAN without EVPN on Switch-1, you need to do the following steps:

Configure loopback interfaces with IP addresses on each switch Configure VLAN interfaces with IP addresses on each switch Configure VXLAN interfaces with VNIs on each switch Configure peer IP addresses for each VNI on each switch

Configure static routes or dynamic routing protocols to enable reachability between loopback interfaces On Switch-1, setting 192.168.1.3 as a peer IP address in the VNI 5020 context means that Switch-1 can send and receive VXLAN traffic

for VNI 5020 to and from Switch-2, which has the loopback interface with IP address 192.168.1.3.

Correct Answer: A

The status is Protection, which means that the ring is up and fully connected with the RPL port blocked is what the specified status means for Ethernet Ring Protection Switching (ERPS) on an ArubaOS-CX switch. Protection is one of the possible statuses for an ERPS ring instance, and it indicates that the ring is operating normally with one port blocked to prevent loops. The RPL port is the port that connects to the RPL node, which is responsible for blocking and unblocking traffic on the ring2

Correct Answer: A

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 .

Correct Answer: A

A GRE tunnel interface is a virtual interface that can encapsulate different network layer protocols inside point-to-point or point-to-multipoint links over an IP network1 . It can be assigned an IP address and attached to a VRF. A VRF allows multiple instances of a routing table to co-exist within the same router2. By attaching a GRE tunnel interface to a VRF, you can isolate the traffic of that tunnel from other tunnels and routing domains2.

Correct Answer: A

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. When ARP-Suppression is enabled, the switch replies to ARP requests with information present in the local ARP Table2. Therefore, this statement about ARP and ND Suppression is true, and the correct answer is yes. 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.

Correct Answer: B

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.

Correct Answer: B

A physical interface using Layer 2 mode cannot be attached to a VRF on an ArubaOS-CX switch. A VRF is a virtual routing and forwarding instance that provides logical separation of routing tables on a switch. A physical interface can only be attached to a VRF if it is using Layer 3 mode and has an IP address assigned to it1.

Correct Answer: A

The show dcbx interface command shows the current DCBx status and the configuration of PFC, ETS, and application priority applied on the interface and the status of the TLVs received from the peer1. The Application Priority Map section

shows the protocol, port/type and priority for both local and remote advertisements. Therefore, this is where you can see whether the connected converged network adapter (CNA) has accepted the application priorities advertised with DCBX.

Reference:

https://www.arubanetworks.com/techdocs/AOS-CX/AOSCX-CLI- Bank/cli_8400/Content/Chp_DCBx/DCBx_cmds/sho-dcb-int.htm