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Question 110
A dual-core campus needs an access switch to form a cross-chassis LAG to two independent aggregation switches. Which check most directly demonstrates the desired network behavior?
- Inspect VSX peer health, LAG member state and traffic after losing one aggregation node
- Compare VLAN, LAG and active-gateway parameters on each peer and test flows
- Trace a client flow and inspect both peers' next-hop and MAC tables
- Test a planned building-level power failure and verify alternate gateway and path availability
Explanation
Correct Answer
A:A successful peer relationship alone does not prove data-plane recovery. VSX can present resilient LAG connectivity while preserving independent control planes.
Incorrect Answers
B:Divergent peer settings may appear only on one hashed path. By contrast, a successful peer relationship alone does not prove data-plane recovery.
C:A full-path inspection exposes unexpected inter-switch forwarding. In this situation, a successful peer relationship alone does not prove data-plane recovery.
D:Device-level failover cannot prove building-level recovery. It would not resolve the documented symptom; a successful peer relationship alone does not prove data-plane recovery.
Question 111
A dual-core campus needs an access switch to form a cross-chassis LAG to two independent aggregation switches. Which assumption would be most misleading when investigating this situation?
- Treat two unrelated switches as a single LACP endpoint without a supported multi-chassis design
- Assume all newly inserted stack members inherit every configuration before joining completes
- Disable all peer-liveness checks merely to clear an operational alarm
- Assume a common VSF control plane supplies power to ports on a failed unit
Explanation
Correct Answer
A:Ordinary switches cannot independently advertise the same logical bundle identity. VSX can present resilient LAG connectivity while preserving independent control planes.
Incorrect Answers
B:A joining device can be incompatible or in recovery state. By contrast, ordinary switches cannot independently advertise the same logical bundle identity.
C:Suppressing detection can increase split-brain risk. The relevant technical distinction is that ordinary switches cannot independently advertise the same logical bundle identity.
D:Stacking virtualizes management, not the failed hardware's electrical outputs. It would not resolve the documented symptom; ordinary switches cannot independently advertise the same logical bundle identity.
Question 112
A dual-core campus needs an access switch to form a cross-chassis LAG to two independent aggregation switches. Which safeguard best reduces the deployment risk in this case?
- Validate the topology against the supported platform guide before modifying failover roles
- Test both peer and inter-switch-link failures during a maintenance rehearsal
- Spread critical APs across members or provide alternate coverage where feasible
- Test a primary uplink failure and check that the intended backup becomes active
Explanation
Correct Answer
B:A topology must remain predictable when different components fail. A successful peer relationship alone does not prove data-plane recovery.
Incorrect Answers
A:Ad hoc changes to both peers can worsen an existing loop. By contrast, a topology must remain predictable when different components fail.
C:Power-domain diversity limits a single member's impact. Here, however, a topology must remain predictable when different components fail.
D:A blocked standby path is only useful if it recovers service. The relevant technical distinction is that a topology must remain predictable when different components fail.
Question 113
A closet has four compatible access switches and the operations team wants one management plane. What is the most appropriate first technical change?
- Verify PoE distribution and surviving port locations in the VSF design
- Review stack election priorities, software compatibility and synchronized configuration
- Build a supported VSF stack with correct stacking links, roles and firmware alignment
- Design the supported ring or routed redundancy mechanism and its convergence behavior
Explanation
Correct Answer
C:VSF creates a logical switch from supported members for simpler access-layer operation. A healthy stack must maintain the intended surviving interfaces.
Incorrect Answers
A:Logical redundancy cannot power devices physically attached to a failed chassis. The relevant technical distinction is that vSF creates a logical switch from supported members for simpler access-layer operation.
B:Stable leadership and matching software reduce inconsistent stack state. Here, however, vSF creates a logical switch from supported members for simpler access-layer operation.
D:Physical rings require a control plane that prevents loops in normal service. In this situation, vSF creates a logical switch from supported members for simpler access-layer operation.
Question 114
A closet has four compatible access switches and the operations team wants one management plane. Which observation would best verify that the intended behavior is working?
- Inspect stack membership, conductor role and port availability during member removal
- Compare per-tenant utilization and queue drops under concurrent load
- Check ARP/neighbor resolution and client gateway traffic on each peer separately
- Correlate ISL errors with VSX synchronization status and active LAG behavior
Explanation
Correct Answer
A:A healthy stack must maintain the intended surviving interfaces. VSF creates a logical switch from supported members for simpler access-layer operation.
Incorrect Answers
B:Resource contention may not appear in a single-tenant test. In this situation, a healthy stack must maintain the intended surviving interfaces.
C:A reachable VIP on one node does not prove resilient first-hop operation. Here, however, a healthy stack must maintain the intended surviving interfaces.
D:The timeline connects physical impairment to distributed control state. It would not resolve the documented symptom; a healthy stack must maintain the intended surviving interfaces.
Question 115
A closet has four compatible access switches and the operations team wants one management plane. Which belief about the configuration should the team reject?
- Assume VSX and VSF provide identical control-plane and management behavior
- Assume a healthy keepalive link replaces the data synchronization functions of the ISL
- Assume VSX high availability guarantees zero application loss under every upgrade condition
- Treat a physically closed Ethernet ring as automatically loop-free without STP or equivalent protection
Explanation
Correct Answer
A:VSX retains independent switch controls while VSF virtualizes a stack. VSF creates a logical switch from supported members for simpler access-layer operation.
Incorrect Answers
B:Keepalive and ISL serve different purposes. By contrast, vSX retains independent switch controls while VSF virtualizes a stack.
C:Network services can depend on external routing and client behavior. In this situation, vSX retains independent switch controls while VSF virtualizes a stack.
D:Redundant physical paths can cause persistent flooding. It would not resolve the documented symptom; vSX retains independent switch controls while VSF virtualizes a stack.
Question 116
A closet has four compatible access switches and the operations team wants one management plane. What should be included in the rollout plan to limit a foreseeable failure?
- Keep diverse stack links and validate surviving PoE and uplink capacity
- Run a controlled single-peer maintenance with a rollback and stop criteria
- Restore an isolated keepalive path and rehearse partial-link failures in a lab
- Replace an unsupported optic in a maintenance window and verify a safe recovery sequence
Explanation
Correct Answer
A:A member failure may remove both power and forwarding ports. A healthy stack must maintain the intended surviving interfaces.
Incorrect Answers
B:A staged operation prevents simultaneous loss of both forwarding planes. The relevant technical distinction is that a member failure may remove both power and forwarding ports.
C:Control-plane resilience requires tested failure combinations. By contrast, a member failure may remove both power and forwarding ports.
D:A partially degraded peer pair can behave unpredictably under another failure. It would not resolve the documented symptom; a member failure may remove both power and forwarding ports.
Question 117
A VSX pair retains user forwarding but peer health alarms recur after a new ISL optic is installed. What should the network engineer do to address this requirement?
- Check current peer symmetry and multi-chassis LAG availability before maintenance
- Check inter-switch link negotiation, optics and VSX state synchronization
- Deploy a supported VSX pair with multi-chassis LAG and compatible peer coordination
- Review active-gateway and routing behavior across both peers including inter-peer paths
Explanation
Correct Answer
B:VSX peer synchronization depends on a stable and correctly configured ISL. The timeline connects physical impairment to distributed control state.
Incorrect Answers
A:The surviving peer must carry intended traffic before one node stops. By contrast, vSX peer synchronization depends on a stable and correctly configured ISL.
C:VSX can present resilient LAG connectivity while preserving independent control planes. The relevant technical distinction is that vSX peer synchronization depends on a stable and correctly configured ISL.
D:Incorrect gateway or route state can circulate traffic between peers. Here, however, vSX peer synchronization depends on a stable and correctly configured ISL.
Question 118
A VSX pair retains user forwarding but peer health alarms recur after a new ISL optic is installed. What should the team inspect to confirm the result?
- Correlate ISL errors with VSX synchronization status and active LAG behavior
- Inspect stack membership, conductor role and port availability during member removal
- Test a planned building-level power failure and verify alternate gateway and path availability
- Check AP uplink placement and power draw before and after member loss
Explanation
Correct Answer
A:The timeline connects physical impairment to distributed control state. VSX peer synchronization depends on a stable and correctly configured ISL.
Incorrect Answers
B:A healthy stack must maintain the intended surviving interfaces. Here, however, the timeline connects physical impairment to distributed control state.
C:Device-level failover cannot prove building-level recovery. The relevant technical distinction is that the timeline connects physical impairment to distributed control state.
D:Resilient switching requires enough live physical interfaces. In this situation, the timeline connects physical impairment to distributed control state.
Question 119
A VSX pair retains user forwarding but peer health alarms recur after a new ISL optic is installed. Which misconception is most likely to obstruct a correct fix?
- Assume all newly inserted stack members inherit every configuration before joining completes
- Assume a common VSF control plane supplies power to ports on a failed unit
- Assume VSX and VSF provide identical control-plane and management behavior
- Assume a healthy keepalive link replaces the data synchronization functions of the ISL
Explanation
Correct Answer
D:Keepalive and ISL serve different purposes. VSX peer synchronization depends on a stable and correctly configured ISL.
Incorrect Answers
A:A joining device can be incompatible or in recovery state. Here, however, keepalive and ISL serve different purposes.
B:Stacking virtualizes management, not the failed hardware's electrical outputs. In this situation, keepalive and ISL serve different purposes.
C:VSX retains independent switch controls while VSF virtualizes a stack. It would not resolve the documented symptom; keepalive and ISL serve different purposes.
Question 120
A VSX pair retains user forwarding but peer health alarms recur after a new ISL optic is installed. What precaution is most important before the change is expanded?
- Capacity-test the combined peak workload and define failure-mode limits
- Keep diverse stack links and validate surviving PoE and uplink capacity
- Replace an unsupported optic in a maintenance window and verify a safe recovery sequence
- Keep a labeled spare and verified configuration backup before swapping hardware
Explanation
Correct Answer
C:A partially degraded peer pair can behave unpredictably under another failure. The timeline connects physical impairment to distributed control state.
Incorrect Answers
A:Shared resilience must be sized for the largest expected simultaneous demand. In this situation, a partially degraded peer pair can behave unpredictably under another failure.
B:A member failure may remove both power and forwarding ports. It would not resolve the documented symptom; a partially degraded peer pair can behave unpredictably under another failure.
D:A documented spare path shortens user downtime. By contrast, a partially degraded peer pair can behave unpredictably under another failure.
HPE Network Campus Access Professional (HPE7-A01) Practice Tests