HPE4-A52 Sample Questions & Answers
AAA and network access control for wired and routed networks carry the top share, ahead of resilient Layer 2 switching that leans on VSX plus spanning tree, OSPF and BGP routing, VXLAN and EVPN fabric tied with QoS and secure WLAN deployment, and device onboarding.
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- Question 1Beginner
Deploy and Troubleshoot Secure and Resilient Layer 2 Campus Network · Advanced Spanning Tree with hardening
You are implementing a security hardening policy on the access layer switches. You want to ensure that if a malicious user connects a rogue switch to an edge port and attempts to become the root bridge, the port is immediately placed into a 'blocking' or 'inconsistent' state, but recovers automatically if the rogue BPDU stops. Which feature should you enable?
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Correct answer: C
Root Guard enforces the position of the root bridge. If a port configured with Root Guard receives a superior BPDU (indicating a better path to root), the port enters a root-inconsistent state rather than changing the root port, effectively blocking the rogue path. It recovers automatically when superior BPDUs cease.
- Question 2Intermediate
Deploy and Troubleshoot Secure and Resilient Layer 2 Campus Network · Loop prevention and storm control
A customer requires a loop prevention mechanism that is independent of Spanning Tree Protocol (STP) for their edge ports, specifically to detect if an unmanaged switch connected to an edge port has a loop. Which feature in AOS-CX is designed to send proprietary packets to detect this condition and shut down the port?
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Correct answer: B
Loop Protection in AOS-CX sends proprietary loop-detect packets out of an interface. If the packet returns to the same switch, it indicates a loop downstream (e.g., on an unmanaged hub/switch) and disables the port. This works independently of STP.
- Question 3Intermediate
Deploy and Troubleshoot Secure and Resilient Layer 2 Campus Network · Optimized VSX and/or VSF Features with Best Practices
You are troubleshooting a VSX cluster where the configuration synchronization is failing. The 'show vsx status' command indicates 'Config Sync Status: Disabled'. You verify that the ISL is up and the keepalive is reachable. Which of the following commands must be executed to enable synchronization from the primary to the secondary?
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Correct answer: C
In AOS-CX, VSX config sync is granular. You must go into the specific feature contexts (like
interface lagorspanning-tree) and typevsx-sync. However, to check global sync status, you look atshow vsx status. If it says disabled, it typically implies no contexts are configured for sync or the peers are mismatched. But specifically, there isn't a global 'turn on sync' switch; you enable it per feature. - Question 4Beginner
Deploy and Troubleshoot Secure and Resilient Layer 2 Campus Network · Optimized VSX and/or VSF Features with Best Practices
A network architect is designing a VSF stack for an access closet using Aruba CX 6300 switches. The design requires high availability. Which topology recommendation ensures the highest resilience against a single link or switch failure within the VSF stack?
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Correct answer: B
A ring topology connects the first member to the last member, ensuring that if any single member or link fails, the stack remains intact and reachable via the alternate path, providing superior resiliency compared to a chain.
- Question 5IntermediateSelect 2
Design, Deploy and Troubleshoot Reliable and Resilient Layer 3 Campus Network · Anycast and First Hop Redundancy
Which TWO statements accurately describe the behavior of the 'active-gateway' feature in an AOS-CX VSX environment? (Select TWO)
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Correct answers: A, B
Active Gateway requires specifying a virtual MAC address (along with the virtual IP) that is shared between the VSX peers for that SVI.
The primary benefit of active-gateway in VSX is that both switches program the virtual MAC/IP in hardware and can route traffic active-active, unlike VRRP which is active-standby.
- Question 6Intermediate
Design, Deploy and Troubleshoot Reliable and Resilient Layer 3 Campus Network · Optimized and secure Multi Area OSPF
A network engineer is configuring OSPF on a campus core consisting of two Aruba CX 8360 switches. The core switches connect to several distribution blocks. To minimize the size of the routing table in the distribution blocks (which are in OSPF Area 1), the engineer wants to inject only a default route and block all other summary LSAs. Which area type should be configured for Area 1?
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Correct answer: B
A Totally Stubby Area blocks Type 3 (Summary), Type 4, and Type 5 LSAs, replacing them with a single default route. This provides the smallest routing table for the area members.
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