HP HPE2-W09 Practice Test - Questions Answers, Page 12

ERPS is a feature of ArubaOS-CX that prevents loops at layer 2 on ring networks1. ERPS uses a protocol called Ring Auto Protection Switching (RAPS) to detect link failures and perform fast traffic switchover1. ERPS has two timers that control the protection switching mechanism: guard timer and hold off timer1. The guard timer prevents false switching caused by delayed or lost RAPS PDUs1. The guard interval is set in units of 10 ms and should exceed the maximum expected delay for forwarding a frame around the complete ring1. This ensures that all switches on the ring receive the RAPS PDUs before the guard timer expires1. Therefore, this is a guideline for configuring timers for ERPS, and the correct answer is yes. For more information on ERPS and timers, refer to the Aruba Data Center Network Specialist (ADCNS) certification datasheet2 and the ERPS Guide for your switch model1.

ERPS is a feature of ArubaOS-CX that prevents loops at layer 2 on ring networks1. ERPS uses a protocol called Ring Auto Protection Switching (RAPS) to detect link failures and perform fast traffic switchover1. ERPS supports multiple rings and multiple instances per ring1. Each instance has a control VLAN and one or more protected VLANs1. The control VLAN carries the RAPS PDUs and must be unique per ring1. The protected VLANs are the user traffic VLANs that are protected by ERPS and must be unique per instance1. Based on the exhibit, the design for the control and protected VLANs on the VSX fabric 1 switches is not valid. The control VLAN 51 is used for both instances 1 and 2 on ring 1, which violates the rule that the control VLAN must be unique per ring1. The protected VLANs 51-100 and 101-150 are also overlapping with the control VLAN 51, which violates the rule that the protected VLANs must be unique per instance1. Therefore, this is not a valid design for the control and protected VLANs on the VSX fabric 1 switches, and the correct answer is no. For more information on ERPS and VLANs, refer to the Aruba Data Center Network Specialist (ADCNS) certification datasheet2 and the ERPS Guide for your switch model1.

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 .

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-CLIBank/cli_8400/Content/Chp_DCBx/DCBx_cmds/sho-dcb-int.htm

The ArubaOS-CX portfolio for data center networks consists of different switches for different roles. The Aruba 8400 switches are designed for the core and aggregation layers, while the Aruba CX 6300 and CX 6400 switches are designed for the leaf layer1. Therefore, deploying Aruba 8400 switches as data center leaf switches is not how you should position switches in the ArubaOS-CX portfolio for data center networks. Reference: https://www.arubanetworks.com/solutions/datacenter-modernization/

The Virtual Switching Extension (VSX) fabric is a high availability solution that provides industryleading performance and simplicity for campus and data center networks1. When the ISL goes down, and after a few seconds, the keepalive link goes down too, the VSX fabric reacts differently depending on the split-recovery mode setting. If the split-recovery mode is enabled, the secondary switch shuts down all its SVIs and waits for the ISL to come back up2. If the split-recovery mode is disabled, both switches keep their SVIs up and continue to forward traffic2. Therefore, this does not correctly describe how the VSX fabric reacts to various component failure scenarios. Reference:

https://www.arubanetworks.com/assets/tg/TB_VSX.pdf

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 solution is incorrect because adding VRF B as the secondary VRF on VLAN interface 30 is not part of a valid setup for meeting these requirements. Adding VRF B as the secondary VRF on VLAN interface 30 would allow devices in VLAN 30 to communicate with devices in VRF B, but not vice versa. Therefore, adding VRF B as the secondary VRF on VLAN interface 30 is not sufficient for meeting these requirements.

: https://www.arubanetworks.com/support-services/training-services/data-center-networkspecialist/

Adding a route with this command: ip route 10.1.20.0/24 vlan20 vrf A is not part of a valid setup for meeting these requirements. This command would add a static route for 10.1.20.0/24 in VRF A, but it would not be able to reach VLAN 20 on Switch-2 because Switch-2 does not have a VLAN interface for VLAN 20 in VRF A. To make the services in VLAN 30 available to devices in 10.1.20.0/24 in VRF B, you need to use inter-VRF routing or route leaking between VRF A and VRF B on Switch-11.