HP HP Certifications HPE2-W09 Questions & Answers

• Question 31:

  Refer to the exhibit.

  

  Switch-1 and Switch-2 ate ArubaOS-CX switches that implement VXLAN WITHOUT Ethernet VPN (EVPN). Switch-2 uses the same VNI-to-VLAN mappings as Switch-1. Is this how the specified servers communicate?

  Solution: Server 1 and Server 4 require routing services within the VXLANs to communicate with each other.

  A. Yes

  B. No

  Correct Answer: B

  The exhibit shows a network topology where Switch-1 and Switch-2 are ArubaOS-CX switches that implement VXLAN without Ethernet VPN (EVPN). Switch-2 uses the same VNI-to-VLAN mappings as Switch-1. The question asks how the specified servers communicate, which means Server 1 and Server 4. Server 1 and Server 4 are in different VLANs and different VNIs, which means they are in different layer 2 segments. To communicate with each other, they require routing services between the VXLANs. However, using Virtual Routing and Forwarding (VRF) to tunnel iSCSI traffic through the network spine on the same links that data traffic uses is not the correct way to provide routing services. VRF is a technology that creates multiple isolated Layer 3 domains on a physical network, each with its own routing table. VRF does not provide any benefits for iSCSI traffic, as it does not guarantee bandwidth, priority, or quality of service. VRF also adds overhead and complexity to the network configuration1. To provide routing services between the VXLANs, the correct way is to use VXLAN routing with EVPN or distributed anycast gateway (DAG). VXLAN routing with EVPN allows the switches to exchange MAC and IP information using BGP EVPN control plane, and to perform routing between different VNIs using a centralized or distributed model2. DAG allows the switches to act as anycast gateways for their local hosts, and to route traffic between different VNIs using a symmetric or asymmetric model3. Therefore, this does not correctly describe how the specified servers communicate.

• Question 32:

  You enter this command on an ArubaOS-CX switch:

  Switch# show erps status ring 1

  Is this what the specified status means?

  Solution: The status is Idle, which means that the ring is up and fully connected with the RPL port blocked.

  A. Yes

  B. No

  Correct Answer: B

  The status is Idle, which means that the ring is up and fully connected with the RPL port blocked is not what the specified status means for Ethernet Ring Protection Switching (ERPS) on an ArubaOS-CX switch. Idle is one of the possible statuses for an ERPS ring instance, but it indicates that the ring is not operational and no port is blocked. This can happen when the ring is not configured properly or when there is a miscommunication between the nodes1.

• Question 33:

  Is this statement about ARP and ND Suppression true?

  Solution: Both ARP-Suppression and ND-Suppression are disabled by default.

  A. Yes

  B. No

  Correct Answer: B

  Both ARP-Suppression and ND-Suppression are disabled by default is not a true statement about ARP and ND Suppression. ARP-Suppression is enabled by default on ArubaOS-CX switches, while ND-Suppression is disabled by default1. ARP-Suppression and ND-Suppression are features that reduce broadcast traffic on VXLAN networks by using a local ARP/ND cache on each switch instead of flooding ARP/ND requests to all VXLAN tunnel endpoints (VTEPs)1.

• Question 34:

  Can you attach this type of ArubaOS-CX interface to a VRF? Solution: A Layer 3 VLAN interface

  A. Yes

  B. No

  Correct Answer: A

  A Layer 3 VLAN interface is an interface that 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 router. By attaching a Layer 3 VLAN interface to a VRF, you can isolate the traffic of that VLAN from other VLANs and routing domains12. This can enhance security and performance of the network.

• Question 35:

  Is this a way that a data center technology can help meet requirements for multi-tenancy?

  Solution: Virtual Extensible LAN (VXLAN) enables multiple isolated Layer 3 domains, each with its own routing table, to share a physical network.

  A. Yes

  B. No

  Correct Answer: B

  Virtual Extensible LAN (VXLAN) enables multiple isolated Layer 3 domains, each with its own routing table, to share a physical network is not a way that a data center technology can help meet requirements for multi-tenancy. Multi-tenancy is the ability to provide logical separation and isolation of network resources for different tenants or customers on a shared physical infrastructure. VXLAN is a feature that provides Layer 2 extension over Layer 3 networks using UDP encapsulation. VXLAN does not enable multiple isolated Layer 3 domains, but rather multiple isolated Layer 2 domains, each with its own VNI1.

• Question 36:

  Is this part of the process for using NetEdit to update firmware on ArubaOS-CX switches?

  Solution: Use a firmware update plan to manage both updating the Image on selected devices and reboot.

  A. Yes

  B. No

  Correct Answer: A

  Use a firmware update plan to manage both updating the Image on selected devices and reboot is part of the process for using NetEdit to update firmware on ArubaOS- CX switches. NetEdit is a tool that provides automation and analytics for managing ArubaOS-CX switches. A firmware update plan is a type of plan that allows you to update the firmware image on one or more switches and reboot them as needed1.

• Question 37:

  You are configuring Ethernet Ring Protection Switching (ERPS) on an ArubaOS-CX switch.

  Is this a guideline for configuring timers?

  Solution: The guard interval is set in units of seconds and is used to prevent frequent topology changes due to a link going up and down.

  A. Yes

  B. No

  Correct Answer: B

  The guard interval is set in units of seconds and is used to prevent frequent topology changes due to a link going up and down is not a guideline for configuring timers for Ethernet Ring Protection Switching (ERPS) on an ArubaOS-CX switch. The guard interval is set in units of milliseconds, not seconds, and it is used to prevent false ring failures due to short link outages or flapping1.

• Question 38:

  Is this a requirement for implementing Priority Flow Control (PFC) on an ArubaOS-CX switch interface? Solution: configuring trust of Cos on the interface

  A. Yes

  B. No

  Correct Answer: A

  Configuring trust of CoS on the interface is a requirement for implementing Priority Flow Control (PFC) on an ArubaOS-CX switch interface. PFC is a feature that allows a switch to pause traffic on a per-class basis using IEEE 802.1Qbb frames. To use PFC, the switch must trust the CoS values in the incoming frames and map them to priority groups and queues1.

• Question 39:

  Refer to the exhibit.

  

  You need to set up an ArubaOS-CX switch to implement Virtual Extensible LAN (VXLAN) WITHOUT Ethernet VPN (EVPN). The exhibit Indicates which servers should be part of the same VXLANs and the desired VNls for the VXLANs. Assume that the network is already configured to permit each ArubaOS-CX switch to reach each other switch's loopback interface.

  Is this part of the process for setting up VXLAN to meet the requirements?

  Solution: On Switch-1, create two VXLAN interfaces, one with ID 5010 and one with 1D 5020; both VXLAN interfaces should use 192.168.1.1 as the source IP address.

  A. Yes

  B. No

  Correct Answer: A

  VXLAN is a feature of ArubaOS-CX that provides layer 2 connectivity between networks across an IP network1. VXLAN uses a 24-bit identifier called VXLAN Network Identifier (VNI) to segment the layer 2 domain1. VXLAN also uses a tunnel endpoint (VTEP) to encapsulate and decapsulate VXLAN packets1. A VXLAN interface is a logical interface that represents a VNI and is associated with a source IP address and a VRF1. To set up VXLAN without EVPN, you need to create VXLAN interfaces on each switch and configure static VTEP peers1. Based on the exhibit, Switch-1 needs to create two VXLAN interfaces, one with ID 5010 and one with ID 5020, to match the VNIs of the servers connected to it. Both VXLAN interfaces should use 192.168.1.1 as the source IP address, which is the loopback interface of Switch-1. Therefore, this is part of the process for setting up VXLAN to meet the requirements, and the correct answer is yes. For more information on VXLAN and EVPN, refer to the Aruba Data Center Network Specialist (ADCNS) certification datasheet2 and the EVPN VXLAN Guide for your switch model1.

• Question 40:

  Is this a way that Virtual Switching Extension (VSX) differs from Virtual Switching Framework (VSF)?

  Solution: VSX features a dual control plane while VSF features a single control plane.

  A. Yes

  B. No

  Correct Answer: A

  VSX features a dual control plane while VSF features a single control plane. VSX and VSF are both high availability solutions that provide redundancy and load balancing across a pair of switches1. However, VSX features a dual control plane, which means that each switch has its own independent configuration and state information1 . VSF features a single control plane, which means that one switch acts as the commander and synchronizes the configuration and state information to the other switch1. The statement is true because it correctly describes the difference between VSX and VSF control planes.