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| Section | Objectives |
|---|---|
| Topic 1: Prepare and Present the Solution | |
| Topic 2: Determine Customer's Requirements | |
| Topic 3: Architect the Solution | |
| Topic 4: Analyze Requirements |
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NEW QUESTION # 24
Waratah Hospital, based in Australia, is planning to move many data center services to new facility. (The remaining legacy data center will not be part of this project.) Waratah Hospital hired an external consultant to assist with the new data center network design.
Based on the requirements for the data center network infrastructure, the external consultant has created a high-level design. The below summarizes the content of the design document.
Requirements and information:
- Six racks in the data center room (single row).
- Redundant Top of Rack leaf switches with back-to-front cooling in each rack, providing 10/25 Gbps connectivity to servers, storage, and other devices.
- Four 100 GbE uplinks per leaf switch.
- The customer requested to install all switch ports facing the back of the rack racks (hot aisle.)
- OOB management for servers, storage, and network has to be provided through an external switch with back-to-front cooling. This switch has to be included in the solution. One OOB switch provides connectivity for two racks.
- Core equipment for the OOBM network is being reused.
- Middle-of-row spine switches.
-The data center should connect to the hospital building with links that provide 400 Gbps.
- Internet access is provided through an existing firewall cluster with two firewalls, each firewall in one data room. The second firewall is operating in standby mode, VRRP is utilized on the firewalls for failover. The data center network should connect to these firewalls with links that total
100 Gbps.
- The external link is a dark fiber direct link based on single-mode fiber (OS2). The distance to the main hospital 1.5 KM. The links will terminate on two core switches in the hospital.
The customer also requires:
- 99.999% uptime for this life-critical environment.
- Planned and unplanned downtime has to be minimized.
- Software upgrades are only allowed once per year with close to zero downtime.
- All life-critical resources are accessed locally, and all resources exist within the hospital campus.
- Waratah Hospital requires a highly secure environment for the data center. Encrypted wire speed connectivity between the data room and the hospital is a must-have because the link between the buildings crosses a public road.
- Waratah Hospital has a mix of virtualized (vSphere) servers. Nutanix storage, bare metal servers, backup servers and other devices.
In the past, the hospital has had a security breach that resulted in data loss, network downtime, and identity theft.
What are valid assumptions that can be made for this scenario when creating the network design documentation? (Choose two.)
Answer: C,D
Explanation:
It is valid to document assumptions that sufficient virtualization resources will exist for required software and that sufficient inter-site cabling will be available for the design.
NEW QUESTION # 25
You are designing a pair of CX switches to function as ToR switches. The switches use VSX in a data-center Layer 2 topology and connect to the core through VSX LAGs. To satisfy expansion requirements, you must keep as many ports available as possible.
Which option should you recommend for VSX keepalives?
Answer: D
Explanation:
ArubaOS-CX Virtual Switching Extension (VSX) relies on two communication channels between peer switches: the Inter-Switch Link (ISL) and the peer keepalive link. The ISL is a high-speed Layer 2 transport link that carries state synchronization (VSX-sync), control protocols, and data plane traffic when necessary.
The peer keepalive link operates strictly as a heartbeat mechanism over a Layer 3 path, allowing each switch to detect peer liveness and prevent split-brain scenarios if the ISL experiences a catastrophic physical failure.
A fundamental rule of VSX architecture dictates that the peer keepalive path must be completely independent and isolated from the ISL data plane. While architects can deploy a dedicated front-panel data port configured with a routed IP address in a separate VRF, doing so consumes valuable front-panel interfaces that could otherwise provide server downlink connectivity.
To optimize port density and maximize available access interfaces for future expansion, HPE best practices recommend utilizing the dedicated Out-of-Band Management (OOBM) Ethernet port (mgmt interface) for VSX keepalives. Because OOBM interfaces operate inside the isolated mgmt VRF and traverse an external management network switch, they provide the necessary physical and logical separation from the production data plane without consuming high-speed front-panel ports.
Reference Topics: HPE ArubaOS-CX High Availability - VSX Peer Keepalive Design, OOBM vs. Dedicated Data Link Configuration, Port Density Optimization.
NEW QUESTION # 26
Which document is most useful for capturing the customer's non-negotiable requirements versus features that are merely desirable, early in the design engagement?
Answer: D
Explanation:
A requirements traceability matrix or MoSCoW (Must have, Should have, Could have, Won't have) list explicitly separates mandatory requirements from nice-to-have features, ensuring the design addresses what truly matters to the customer. BOMs, rack elevations, and cable plans are downstream artifacts.
NEW QUESTION # 27
A customer's data center is expanding from one row to five rows over the next two years. What design principle should guide the initial fabric design to support this growth?
Answer: B
Explanation:
A modular spine-leaf design allows incremental scale-out (adding leaves/racks) without re- architecting the fabric, which is essential when the customer has known growth plans. Designing only for the current state, or ignoring growth plans, risks a costly redesign later.
NEW QUESTION # 28
Which two questions should be asked to properly size the data center fabric's east-west bandwidth requirements? (Choose two.)
Answer: B,E
Explanation:
Understanding the east-west to north-south traffic ratio and the intended server-to-leaf oversubscription ratio are both essential inputs for sizing spine and leaf uplink bandwidth correctly. The remaining options are irrelevant to fabric sizing.
NEW QUESTION # 29
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