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Question 150
A school operates VRFs for teaching and administration on one pair of AOS-CX switches. Which observation would best verify that the intended behavior is working?
- Inspect stack uplink configuration and per-member LACP or STP counters
- Check each VRF route table and allowed cross-VRF flow in a live test
- Compare per-tenant utilization and queue drops under concurrent load
- Observe access LAG state, active gateway reachability and application sessions during reboot
Explanation
Correct Answer
B:Distinct route entries prove isolation beyond VLAN tagging. Independent routing tables can segregate traffic on shared physical hardware.
Incorrect Answers
A:The actual state identifies a blocked path versus a fault. It would not resolve the documented symptom; distinct route entries prove isolation beyond VLAN tagging.
C:Resource contention may not appear in a single-tenant test. By contrast, distinct route entries prove isolation beyond VLAN tagging.
D:Peer role alone does not validate end-to-end availability. In this situation, distinct route entries prove isolation beyond VLAN tagging.
Question 151
A school operates VRFs for teaching and administration on one pair of AOS-CX switches. Which belief about the configuration should the team reject?
- Assume VSX high availability guarantees zero application loss under every upgrade condition
- Disable all peer-liveness checks merely to clear an operational alarm
- Assume two access VLANs alone provide separate routing tables within one default VRF
- Assign two unrelated virtual MACs to what is supposed to be one VSX active gateway
Explanation
Correct Answer
C:VLAN segmentation need not separate L3 forwarding contexts. Independent routing tables can segregate traffic on shared physical hardware.
Incorrect Answers
A:Network services can depend on external routing and client behavior. The relevant technical distinction is that vLAN segmentation need not separate L3 forwarding contexts.
B:Suppressing detection can increase split-brain risk. It would not resolve the documented symptom; vLAN segmentation need not separate L3 forwarding contexts.
D:Inconsistent gateway identity may cause client neighbor changes and outages. By contrast, vLAN segmentation need not separate L3 forwarding contexts.
Question 152
A school operates VRFs for teaching and administration on one pair of AOS-CX switches. What should be included in the rollout plan to limit a foreseeable failure?
- Keep a labeled spare and verified configuration backup before swapping hardware
- Test restricted traffic across VRFs and preserve management reachability
- Validate the topology against the supported platform guide before modifying failover roles
- Spread critical APs across members or provide alternate coverage where feasible
Explanation
Correct Answer
B:Incorrect leakage can undermine data segregation or strand support staff. Distinct route entries prove isolation beyond VLAN tagging.
Incorrect Answers
A:A documented spare path shortens user downtime. The relevant technical distinction is that incorrect leakage can undermine data segregation or strand support staff.
C:Ad hoc changes to both peers can worsen an existing loop. By contrast, incorrect leakage can undermine data segregation or strand support staff.
D:Power-domain diversity limits a single member's impact. Here, however, incorrect leakage can undermine data segregation or strand support staff.
Question 153
A campus aggregation switch uses multiple virtual contexts and one tenant consumes all shared uplink capacity. What should the network engineer do to address this requirement?
- Deploy a supported VSX pair with multi-chassis LAG and compatible peer coordination
- Review the shared active-gateway virtual IP/MAC and SVI configuration on both peers
- Plan shared-resource limits and QoS allocation across the virtualized infrastructure
- Use LACP or an appropriately configured spanning-tree topology for parallel paths
Explanation
Correct Answer
C:Separate logical domains still compete for physical ports and bandwidth. Resource contention may not appear in a single-tenant test.
Incorrect Answers
A:VSX can present resilient LAG connectivity while preserving independent control planes. Here, however, separate logical domains still compete for physical ports and bandwidth.
B:Consistent gateway parameters let either peer forward for the subnet. In this situation, separate logical domains still compete for physical ports and bandwidth.
D:Redundancy needs deterministic forwarding and loop prevention. The relevant technical distinction is that separate logical domains still compete for physical ports and bandwidth.
Question 154
A campus aggregation switch uses multiple virtual contexts and one tenant consumes all shared uplink capacity. What should the team inspect to confirm the result?
- Inspect stack membership, conductor role and port availability during member removal
- Compare per-tenant utilization and queue drops under concurrent load
- Check each VRF route table and allowed cross-VRF flow in a live test
- Trace a client flow and inspect both peers' next-hop and MAC tables
Explanation
Correct Answer
B:Resource contention may not appear in a single-tenant test. Separate logical domains still compete for physical ports and bandwidth.
Incorrect Answers
A:A healthy stack must maintain the intended surviving interfaces. Here, however, resource contention may not appear in a single-tenant test.
C:Distinct route entries prove isolation beyond VLAN tagging. In this situation, resource contention may not appear in a single-tenant test.
D:A full-path inspection exposes unexpected inter-switch forwarding. It would not resolve the documented symptom; resource contention may not appear in a single-tenant test.
Question 155
A campus aggregation switch uses multiple virtual contexts and one tenant consumes all shared uplink capacity. Which TWO actions together implement the required change and verify that it works? Choose TWO.
- Enable appropriate configuration synchronization or maintain reviewed matching objects
- Follow the supported member replacement and stack-identity restoration steps
- Run a controlled single-peer maintenance with a rollback and stop criteria
- Compare per-tenant utilization and queue drops under concurrent load
- Plan shared-resource limits and QoS allocation across the virtualized infrastructure
Explanation
Correct Answers
D:Resource contention may not appear in a single-tenant test. Separate logical domains still compete for physical ports and bandwidth.
E:Separate logical domains still compete for physical ports and bandwidth. Resource contention may not appear in a single-tenant test.
Incorrect Answers
A:Both peers must support the same intended multi-chassis forwarding services. By contrast, separate logical domains still compete for physical ports and bandwidth.
B:A correctly provisioned replacement rejoins without overwriting the surviving stack. In this situation, separate logical domains still compete for physical ports and bandwidth.
C:A staged operation prevents simultaneous loss of both forwarding planes. It would not resolve the documented symptom; shared resilience must be sized for the largest expected simultaneous demand.
Question 156
A campus aggregation switch uses multiple virtual contexts and one tenant consumes all shared uplink capacity. What precaution is most important before the change is expanded?
- Stage new members with matched firmware and a backup of the stack configuration
- Validate the topology against the supported platform guide before modifying failover roles
- Replace an unsupported optic in a maintenance window and verify a safe recovery sequence
- Capacity-test the combined peak workload and define failure-mode limits
Explanation
Correct Answer
D:Shared resilience must be sized for the largest expected simultaneous demand. Resource contention may not appear in a single-tenant test.
Incorrect Answers
A:Controlled joining lowers the risk of disrupting existing ports. The relevant technical distinction is that shared resilience must be sized for the largest expected simultaneous demand.
B:Ad hoc changes to both peers can worsen an existing loop. By contrast, shared resilience must be sized for the largest expected simultaneous demand.
C:A partially degraded peer pair can behave unpredictably under another failure. It would not resolve the documented symptom; shared resilience must be sized for the largest expected simultaneous demand.
Question 157
A VSF stack has two uplinks connected to different physical members but only one is forwarding. Which configuration decision most directly resolves the situation?
- Verify the LAG or STP configuration that controls uplink redundancy
- Review stack election priorities, software compatibility and synchronized configuration
- Enable appropriate configuration synchronization or maintain reviewed matching objects
- Verify PoE distribution and surviving port locations in the VSF design
Explanation
Correct Answer
A:The forwarding state may be deliberate under loop-prevention rules. The actual state identifies a blocked path versus a fault.
Incorrect Answers
B:Stable leadership and matching software reduce inconsistent stack state. The relevant technical distinction is that the forwarding state may be deliberate under loop-prevention rules.
C:Both peers must support the same intended multi-chassis forwarding services. By contrast, the forwarding state may be deliberate under loop-prevention rules.
D:Logical redundancy cannot power devices physically attached to a failed chassis. Here, however, the forwarding state may be deliberate under loop-prevention rules.
Question 158
A VSF stack has two uplinks connected to different physical members but only one is forwarding. Which check most directly demonstrates the desired network behavior?
- Test a planned building-level power failure and verify alternate gateway and path availability
- Observe access LAG state, active gateway reachability and application sessions during reboot
- Check each VRF route table and allowed cross-VRF flow in a live test
- Inspect stack uplink configuration and per-member LACP or STP counters
Explanation
Correct Answer
D:The actual state identifies a blocked path versus a fault. The forwarding state may be deliberate under loop-prevention rules.
Incorrect Answers
A:Device-level failover cannot prove building-level recovery. The relevant technical distinction is that the actual state identifies a blocked path versus a fault.
B:Peer role alone does not validate end-to-end availability. Here, however, the actual state identifies a blocked path versus a fault.
C:Distinct route entries prove isolation beyond VLAN tagging. In this situation, the actual state identifies a blocked path versus a fault.
Question 159
A VSF stack has two uplinks connected to different physical members but only one is forwarding. Which assumption would be most misleading when investigating this situation?
- Assume every physically connected redundant link must forward simultaneously in all designs
- Treat a physically closed Ethernet ring as automatically loop-free without STP or equivalent protection
- Insert an unprepared device with duplicate member identity and assume ports map correctly
- Assume VSX high availability guarantees zero application loss under every upgrade condition
Explanation
Correct Answer
A:Some topologies intentionally block alternate paths to avoid loops. The forwarding state may be deliberate under loop-prevention rules.
Incorrect Answers
B:Redundant physical paths can cause persistent flooding. Here, however, some topologies intentionally block alternate paths to avoid loops.
C:Identity conflict can attach users to unintended configuration. It would not resolve the documented symptom; some topologies intentionally block alternate paths to avoid loops.
D:Network services can depend on external routing and client behavior. In this situation, some topologies intentionally block alternate paths to avoid loops.
Question 160
A VSF stack has two uplinks connected to different physical members but only one is forwarding. Which safeguard best reduces the deployment risk in this case?
- Restore an isolated keepalive path and rehearse partial-link failures in a lab
- Document independent power, diverse fiber paths and recovery ownership
- Test a primary uplink failure and check that the intended backup becomes active
- Run a controlled single-peer maintenance with a rollback and stop criteria
Explanation
Correct Answer
C:A blocked standby path is only useful if it recovers service. The actual state identifies a blocked path versus a fault.
Incorrect Answers
A:Control-plane resilience requires tested failure combinations. It would not resolve the documented symptom; a blocked standby path is only useful if it recovers service.
B:True resilience removes shared physical points of failure. In this situation, a blocked standby path is only useful if it recovers service.
D:A staged operation prevents simultaneous loss of both forwarding planes. By contrast, a blocked standby path is only useful if it recovers service.
HPE Network Campus Access Professional (HPE7-A01) Practice Tests