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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Lossless and AI-Optimized Networking | 15% | - Advanced transport and optimization
|
| Topic 2: EVPN-VXLAN Overlay Technologies | 25% | - Overlay network design and implementation
|
| Topic 3: Management, Orchestration and Operations | 10% | - Management architecture and tools
|
| Topic 4: Data Center Network Architecture Design | 30% | - Requirements analysis and solution design
|
| Topic 5: Data Center Network Security and Policy | 20% | - Security architecture and policy enforcement
|
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NEW QUESTION # 27
You are designing a CX-based data center network that uses east-west firewall policies managed by AMD Pensando Policy and Services Manager (PSM).
Which network should be used to communicate with PSM?
Answer: B
Explanation:
AMD Pensando Policy and Services Manager (PSM) functions as the centralized policy, orchestration, and telemetry controller for Distributed Services Modules (DSMs) embedded within the Aruba CX 10000 platform. Reliable, secure connectivity between PSM and the managed CX switches is essential to push microsegmentation policies, collect distributed firewall flow logs, and ensure control plane integrity.
HPE architectural best practices mandate that management communications to PSM must traverse the dedicated Out-of-Band Management (OOBM) network. The switch out-of-band management port (mgmt interface) resides within a completely isolated, hardwired mgmt VRF that operates independently of the production underlay and tenant overlay data planes.
Transmitting management and policy orchestration traffic through the data plane underlay or tenant overlay VRFs introduces critical circular dependencies: any data plane loop, congestion storm, routing change, or restrictive firewall policy misconfiguration could sever connectivity between the CX 10000 switch and PSM.
Confining PSM control traffic to the OOBM network guarantees uncompromised management plane access during high network congestion or active data plane security incidents.
Reference Topics: HPE Aruba CX 10000 Architecture - AMD Pensando PSM Integration, Management Plane Isolation, and OOBM Network Design.
NEW QUESTION # 28
To prepare for a data center network implementation, you asked a customer for a list of VLANs to support.
The customer's list for several VMware ESXi hosts includes 4095.
What follow-up question should you ask?
Answer: A
Explanation:
In VMware vSphere networking, VLAN ID 4095 is reserved as a pseudo-identifier on standard (VSS) and distributed virtual switches (VDS) to enable Virtual Guest Tagging (VGT) mode. Under VGT mode, the virtual switch does not encapsulate, strip, or modify IEEE 802.1Q tags; rather, it passes all tagged frames transparently to the virtual machine's virtual NIC, expecting the guest operating system inside the VM to process and apply the dot1q tags directly.
Because VLAN 4095 does not represent a discrete physical broadcast domain or a valid standard VLAN ID (valid 802.1Q tags range from 1 to 4094), the network architect cannot configure VLAN 4095 on upstream ArubaOS-CX leaf switches. Instead, the architect must determine which specific VLAN tags the guest VMs will actually generate and encapsulate on that port group. Those discrete VLANs must then be created in AOS-CX, bound to the ESXi host-facing switch interfaces as tagged members in 802.1Q trunk mode, and mapped to the appropriate Virtual Network Identifiers (VNIs) if an EVPN-VXLAN fabric overlay is deployed.
Reference Topics: HPE Data Center Architectures - Integrating Virtualized Workloads; VMware vSphere VST, EST, and VGT Tagging Models on AOS-CX Infrastructure.
NEW QUESTION # 29
During the assumptions and constraints phase of a proposal, the customer mentions they have a hard budget cap that is lower than what is needed for full fabric redundancy. What should the architect do?
Answer: A
Explanation:
Architects should document constraints transparently and present trade-off options (e.g., single vs. dual spine, partial redundancy) so the customer can make an informed decision, rather than silently compromising the design or refusing to engage.
NEW QUESTION # 30
What is the recommended practice for using VSX at the core of a two-tier design?
Answer: D
Explanation:
In enterprise data center design, selecting the appropriate High Availability (HA) mechanism at the aggregation/core layer depends directly on whether the downstream access tier operates at Layer 2 or Layer 3.
When designing a traditional two-tier data center topology where the Top-of-Rack (ToR) access switches operate strictly as Layer 2 forwarding entities, default gateway interfaces (SVIs) and inter-VLAN routing must terminate at the core layer. In this architecture, Aruba best practices recommend implementing Virtual Switching Extension (VSX) across the pair of core switches. Deploying VSX at the core allows the downstream Layer 2 access switches to connect to both core switches via multi-chassis link aggregation groups (VSX LAGs). This design creates a loop-free, active-active topology that eliminates blocked Spanning Tree Protocol (STP) links, maximizes link utilization, and provides sub-second failover using VSX active- gateway technology for downstream servers.
Conversely, when the access layer is deployed with EVPN-VXLAN or routed Layer 3 OSPF, equal-cost multi- pathing (ECMP) natively provides redundancy and load distribution, making core-level VSX multichassis clustering unnecessary.
Reference Topics: HPE Data Center Design - Two-Tier vs. Three-Tier Architectures; Applying VSX at the Layer 2/Layer 3 Core Boundary.
NEW QUESTION # 31
You are upgrading a customer's legacy three-tier architecture to an L3 spine-and-leaf topology. The CX switches in the topology will supply the overlay. The customer data center uses six VRFs. The customer has requested service leaf switches that connect to two clustered firewalls, which route and filter traffic between the VRFs.
How should the service leaf switches be connected to the firewalls?
Answer: D
Explanation:
Connecting an external active/passive or active/active firewall cluster to a pair of ArubaOS-CX Service Leaf switches across multiple isolated tenant routing domains requires balancing physical link resiliency with multi- VRF segmentation.
To eliminate single points of physical failure and avoid spanning-tree blocked ports, the two Service Leaf switches should be configured as a Virtual Switching Extension (VSX) pair. Resilient connectivity to the firewall cluster is established using two multi-chassis Link Aggregation Groups (VSX LAGs)-one dedicated VSX LAG terminating on Firewall 1 and a second dedicated VSX LAG terminating on Firewall 2.
Because the customer data center utilizes six discrete VRFs that require dedicated inspection and inter-VRF routing by the firewalls, Layer 3 Routed-Only Ports (ROPs) cannot be used directly, as a physical ROP binds to only a single VRF instance. Instead, each VSX LAG must be configured as an IEEE 802.1Q trunk carrying one designated transit VLAN per VRF. Within each VRF, an SVI is created on the switches to peer with the corresponding sub-interface or VLAN interface on the firewall cluster, maintaining clean end-to-end traffic separation across all six routing domains.
Reference Topics: HPE Data Center Architecture - Connecting Service Leaves to Firewall Clusters; Multi- VRF Handoffs via VSX LAGs and 802.1Q Trunks.
NEW QUESTION # 32
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