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| Section | Objectives |
|---|---|
| Topic 1: Architect the Solution | |
| Topic 2: Determine Customer's Requirements | |
| Topic 3: Analyze Requirements | |
| Topic 4: Prepare and Present the Solution |
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19. Frage
What is the primary purpose of conducting a "current state assessment" before beginning a data center network design?
Antwort: C
Begründung:
A current state assessment creates a factual baseline (topology, traffic flows, capacity, known issues) that the new design must account for or improve upon. It is not a substitute for interviews, nor should it precede requirements gathering in the overall process, nor is it a sales tool.
20. Frage
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.
In this scenario, the customers servers are HPE Servers. For the iLO ports, you propose a 6300M switch for each rack. What is the best practice to connect these switches to the data center data plane?
Antwort: B
Begründung:
iLO/OOB management should remain on the out-of-band management network, separate from the production data plane.
21. Frage
When proposing Aruba CX switches with Fabric Composer for a customer replacing a legacy Cisco Nexus environment, what is an important assumption to document regarding the migration?
Antwort: C
Begründung:
Since NX-OS and AOS-CX have different APIs and CLI syntax, any existing automation tooling built against Nexus will not be directly portable and should be flagged as a migration assumption/risk. AOS-CX does support VXLAN, and Fabric Composer does not eliminate VLANs.
22. Frage
A customer has deployed CX 10000 switches. Fabric Composer, and Pensando Policy and Services Manager (PSM). The switches are discovered in PSM but no VRFs or networks are added. Now the customer wants to get started by applying micro-segmentation to one network.
The customer tells you that they plan to add a policy with rules for permitting desired traffic from endpoints in this network. They will apply it as an egress policy to the network. At this point they will not add any other networks to PSM or apply policies to them. What warning should you give the customer about this plan?
Antwort: B
Begründung:
For CX 10000/PSM policy enforcement, networks in the same VRF should be consistently represented in PSM. Adding only one network can lead to incomplete policy context and unexpected segmentation behavior.
23. Frage
You are designing a network upgrade for a data center that is virtualized with VMware. The customer already uses NSX. You are handling the CX switch design, while the customer is handling the NSX design. What is one question to discuss for the logical design?
Antwort: D
Begründung:
With NSX, the customer owns the overlay design, but the CX network design must account for how overlay networks connect to external/physical networks, including routing boundaries and route exchange.
24. Frage
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