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HPE7-A08 Premium File: 172 Questions & Answers

Last Update: Oct 30, 2026

HPE7-A08 PDF Study Guide: 794 Pages

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HP HPE7-A08 Practice Test 48

Question 470

An HPE Aruba Networking engineer faces this wired-network scenario: Receivers on a remote multicast VLAN lose only the video stream after an uplink change. Which implementation action BEST addresses the requirement?

  1. Restore matching LACP partner mode and consistent member policy
  2. Restore valid PIM neighbor or reverse-path reachability for the multicast group
  3. Correct the VRRP group and priority settings and verify peer reachability
  4. Replace the incompatible optic with the verified approved transceiver type

Explanation

Correct Answer

B:

Multicast route distribution depends on control plane and reverse path correctness. The targeted implementation is to restore valid PIM neighbor or reverse-path reachability for the multicast group. The deployment succeeds when multicast forwarding state and receiver stream return while unicast remains stable.

Incorrect Answers

A:

This implementation choice fits a different situation: An aggregated uplink loses half its capacity after a peer switch update. It does not resolve the stated failure mode. For this case, the decisive implementation choice is to restore valid PIM neighbor or reverse-path reachability for the multicast group.

C:

This implementation choice fits a different situation: A dual gateway pair both appear as active masters after a configuration change. It does not resolve the stated failure mode. For this case, the decisive implementation choice is to restore valid PIM neighbor or reverse-path reachability for the multicast group.

D:

This implementation choice fits a different situation: An uplink stops after a maintenance crew replaces a single transceiver. It does not resolve the stated failure mode. For this case, the decisive implementation choice is to restore valid PIM neighbor or reverse-path reachability for the multicast group.

Question 471

After implementing the approved change — Restore valid PIM neighbor or reverse-path reachability for the multicast group — for this scenario: Receivers on a remote multicast VLAN lose only the video stream after an uplink change. Which observed result BEST verifies the outcome?

  1. Neighbors and intended prefixes recover without redesigning the core
  2. Phones regain their voice VLAN and ordinary VLANs remain unchanged
  3. One appropriate VRRP master and a standby provide stable virtual gateway service
  4. Multicast forwarding state and receiver stream return while unicast remains stable

Explanation

Correct Answer

D:

Multicast forwarding state and receiver stream return while unicast remains stable. This is the observable acceptance evidence for the decision to restore valid PIM neighbor or reverse-path reachability for the multicast group. It demonstrates the principle that multicast route distribution depends on control plane and reverse path correctness.

Incorrect Answers

A:

This verification choice fits a different situation: Routing disappears after an engineer assigns a different OSPF area on one uplink. It does not resolve the stated failure mode. For this case, the decisive verification choice is to multicast forwarding state and receiver stream return while unicast remains stable.

B:

This verification choice fits a different situation: A recent trunk edit accidentally removed a production voice VLAN. It does not resolve the stated failure mode. For this case, the decisive verification choice is to multicast forwarding state and receiver stream return while unicast remains stable.

C:

This verification choice fits a different situation: A dual gateway pair both appear as active masters after a configuration change. It does not resolve the stated failure mode. For this case, the decisive verification choice is to multicast forwarding state and receiver stream return while unicast remains stable.

Question 472

An HPE Aruba Networking design review examines: Receivers on a remote multicast VLAN lose only the video stream after an uplink change. Which technical principle BEST explains the required approach?

  1. Successful authentication does not guarantee correct network authorization
  2. Multicast route distribution depends on control plane and reverse path correctness
  3. Optical module compatibility must match port and fiber constraints
  4. LACP negotiation and bundle settings must match across peers

Explanation

Correct Answer

B:

Multicast route distribution depends on control plane and reverse path correctness. The case therefore calls for this specifically controlled action: restore valid PIM neighbor or reverse-path reachability for the multicast group. The acceptance evidence is that multicast forwarding state and receiver stream return while unicast remains stable.

Incorrect Answers

A:

This principle choice fits a different situation: After a RADIUS policy update authorized users cannot reach their assigned VLAN. It does not resolve the stated failure mode. For this case, the decisive principle choice is to multicast route distribution depends on control plane and reverse path correctness.

C:

This principle choice fits a different situation: An uplink stops after a maintenance crew replaces a single transceiver. It does not resolve the stated failure mode. For this case, the decisive principle choice is to multicast route distribution depends on control plane and reverse path correctness.

D:

This principle choice fits a different situation: An aggregated uplink loses half its capacity after a peer switch update. It does not resolve the stated failure mode. For this case, the decisive principle choice is to multicast route distribution depends on control plane and reverse path correctness.

Question 473

A risk review for the following wired-network case asks what should be avoided: Receivers on a remote multicast VLAN lose only the video stream after an uplink change. Which assumption creates the GREATEST implementation risk?

  1. Forcing unsupported speed modes until an optic appears to work
  2. Power-cycling every campus device without checking stack member identity
  3. Continuing incremental edits without retaining the prechange baseline
  4. Flooding all multicast across access VLANs as a replacement for routing

Explanation

Correct Answer

D:

Flooding all multicast across access VLANs as a replacement for routing. That shortcut fails because multicast route distribution depends on control plane and reverse path correctness. Instead, the appropriate approach is to restore valid PIM neighbor or reverse-path reachability for the multicast group.

Incorrect Answers

A:

This misconception choice fits a different situation: An uplink stops after a maintenance crew replaces a single transceiver. It does not resolve the stated failure mode. For this case, the decisive misconception choice is to flooding all multicast across access VLANs as a replacement for routing.

B:

This misconception choice fits a different situation: A VSF access stack fails to accept a replaced member after maintenance. It does not resolve the stated failure mode. For this case, the decisive misconception choice is to flooding all multicast across access VLANs as a replacement for routing.

C:

This misconception choice fits a different situation: A new switch configuration destabilizes many services after change approval. It does not resolve the stated failure mode. For this case, the decisive misconception choice is to flooding all multicast across access VLANs as a replacement for routing.

Question 474

Before changing switch configuration, an engineer investigates: Receivers on a remote multicast VLAN lose only the video stream after an uplink change. Which FIRST check is most useful for isolating the cause?

  1. Inspect VRRP advertisements, virtual address and interface state
  2. Inspect RPF interface, PIM state and routing changes
  3. Review change diff, checkpoint availability and current fault timeline
  4. Compare saved configuration with current trunk membership

Explanation

Correct Answer

B:

Inspect RPF interface, PIM state and routing changes. This first check isolates the relevant mechanism without an untested configuration change. It tests the rule that multicast route distribution depends on control plane and reverse path correctness.

Incorrect Answers

A:

This diagnostic choice fits a different situation: A dual gateway pair both appear as active masters after a configuration change. It does not resolve the stated failure mode. For this case, the decisive diagnostic choice is to inspect RPF interface, PIM state and routing changes.

C:

This diagnostic choice fits a different situation: A new switch configuration destabilizes many services after change approval. It does not resolve the stated failure mode. For this case, the decisive diagnostic choice is to inspect RPF interface, PIM state and routing changes.

D:

This diagnostic choice fits a different situation: A recent trunk edit accidentally removed a production voice VLAN. It does not resolve the stated failure mode. For this case, the decisive diagnostic choice is to inspect RPF interface, PIM state and routing changes.

Question 475

An implementation change is planned for: Receivers on a remote multicast VLAN lose only the video stream after an uplink change. Which preventive control BEST reduces unnecessary outage and security risk?

  1. Stage peer changes in coordination and precheck partner state
  2. Keep approved replacement procedure and compatible software image ready
  3. Retain tested spare optics with the site runbook
  4. Capture source and group state before uplink maintenance

Explanation

Correct Answer

D:

Capture source and group state before uplink maintenance. This safeguard is appropriate before the change to restore valid PIM neighbor or reverse-path reachability for the multicast group; it reduces exposure to the mistake of flooding all multicast across access VLANs as a replacement for routing.

Incorrect Answers

A:

This prevention choice fits a different situation: An aggregated uplink loses half its capacity after a peer switch update. It does not resolve the stated failure mode. For this case, the decisive prevention choice is to capture source and group state before uplink maintenance.

B:

This prevention choice fits a different situation: A VSF access stack fails to accept a replaced member after maintenance. It does not resolve the stated failure mode. For this case, the decisive prevention choice is to capture source and group state before uplink maintenance.

C:

This prevention choice fits a different situation: An uplink stops after a maintenance crew replaces a single transceiver. It does not resolve the stated failure mode. For this case, the decisive prevention choice is to capture source and group state before uplink maintenance.

Question 476

A first repair attempt for this situation failed: Receivers on a remote multicast VLAN lose only the video stream after an uplink change. The review found the mistaken approach of flooding all multicast across access VLANs as a replacement for routing. Which targeted recovery action BEST restores the intended design?

  1. Restore verified baseline and document the rejected change delta
  2. Correct the mismatched area and validate the neighbor state
  3. Correct multicast neighbor or RPF settings and confirm intended stream
  4. Install the supported optic and restore the saved interface mode

Explanation

Correct Answer

C:

Correct multicast neighbor or RPF settings and confirm intended stream. This addresses the observed risk rather than hiding its symptoms. Confirm the repair when multicast forwarding state and receiver stream return while unicast remains stable.

Incorrect Answers

A:

This remediation choice fits a different situation: A new switch configuration destabilizes many services after change approval. It does not resolve the stated failure mode. For this case, the decisive remediation choice is to correct multicast neighbor or RPF settings and confirm intended stream.

B:

This remediation choice fits a different situation: Routing disappears after an engineer assigns a different OSPF area on one uplink. It does not resolve the stated failure mode. For this case, the decisive remediation choice is to correct multicast neighbor or RPF settings and confirm intended stream.

D:

This remediation choice fits a different situation: An uplink stops after a maintenance crew replaces a single transceiver. It does not resolve the stated failure mode. For this case, the decisive remediation choice is to correct multicast neighbor or RPF settings and confirm intended stream.

Question 477

An HPE Aruba Networking engineer faces this wired-network scenario: A VSF access stack fails to accept a replaced member after maintenance. Which implementation action BEST addresses the requirement?

  1. Replace the incompatible optic with the verified approved transceiver type
  2. Roll back to the known-good checkpoint while isolating the bad delta
  3. Restore matching LACP partner mode and consistent member policy
  4. Reconcile the member identity, supported firmware and stack-link topology

Explanation

Correct Answer

D:

Stack membership depends on hardware, software and topology compatibility. The targeted implementation is to reconcile the member identity, supported firmware and stack-link topology. The deployment succeeds when the replacement member joins in the intended role and stack health is stable.

Incorrect Answers

A:

This implementation choice fits a different situation: An uplink stops after a maintenance crew replaces a single transceiver. It does not resolve the stated failure mode. For this case, the decisive implementation choice is to reconcile the member identity, supported firmware and stack-link topology.

B:

This implementation choice fits a different situation: A new switch configuration destabilizes many services after change approval. It does not resolve the stated failure mode. For this case, the decisive implementation choice is to reconcile the member identity, supported firmware and stack-link topology.

C:

This implementation choice fits a different situation: An aggregated uplink loses half its capacity after a peer switch update. It does not resolve the stated failure mode. For this case, the decisive implementation choice is to reconcile the member identity, supported firmware and stack-link topology.

Question 478

After implementing the approved change — Reconcile the member identity, supported firmware and stack-link topology — for this scenario: A VSF access stack fails to accept a replaced member after maintenance. Which observed result BEST verifies the outcome?

  1. All essential services return before a narrow revised change is retried
  2. The replacement member joins in the intended role and stack health is stable
  3. One appropriate VRRP master and a standby provide stable virtual gateway service
  4. The link becomes stable with acceptable receive power and error rate

Explanation

Correct Answer

B:

The replacement member joins in the intended role and stack health is stable. This is the observable acceptance evidence for the decision to reconcile the member identity, supported firmware and stack-link topology. It demonstrates the principle that stack membership depends on hardware, software and topology compatibility.

Incorrect Answers

A:

This verification choice fits a different situation: A new switch configuration destabilizes many services after change approval. It does not resolve the stated failure mode. For this case, the decisive verification choice is to the replacement member joins in the intended role and stack health is stable.

C:

This verification choice fits a different situation: A dual gateway pair both appear as active masters after a configuration change. It does not resolve the stated failure mode. For this case, the decisive verification choice is to the replacement member joins in the intended role and stack health is stable.

D:

This verification choice fits a different situation: An uplink stops after a maintenance crew replaces a single transceiver. It does not resolve the stated failure mode. For this case, the decisive verification choice is to the replacement member joins in the intended role and stack health is stable.

Question 479

An HPE Aruba Networking design review examines: A VSF access stack fails to accept a replaced member after maintenance. Which technical principle BEST explains the required approach?

  1. Optical module compatibility must match port and fiber constraints
  2. LACP negotiation and bundle settings must match across peers
  3. An OSPF adjacency requires matching interface area context
  4. Stack membership depends on hardware, software and topology compatibility

Explanation

Correct Answer

D:

Stack membership depends on hardware, software and topology compatibility. The case therefore calls for this specifically controlled action: reconcile the member identity, supported firmware and stack-link topology. The acceptance evidence is that the replacement member joins in the intended role and stack health is stable.

Incorrect Answers

A:

This principle choice fits a different situation: An uplink stops after a maintenance crew replaces a single transceiver. It does not resolve the stated failure mode. For this case, the decisive principle choice is to stack membership depends on hardware, software and topology compatibility.

B:

This principle choice fits a different situation: An aggregated uplink loses half its capacity after a peer switch update. It does not resolve the stated failure mode. For this case, the decisive principle choice is to stack membership depends on hardware, software and topology compatibility.

C:

This principle choice fits a different situation: Routing disappears after an engineer assigns a different OSPF area on one uplink. It does not resolve the stated failure mode. For this case, the decisive principle choice is to stack membership depends on hardware, software and topology compatibility.

Question 480

A risk review for the following wired-network case asks what should be avoided: A VSF access stack fails to accept a replaced member after maintenance. Which assumption creates the GREATEST implementation risk?

  1. Leaving duplicate conflicting virtual gateways active in the same VLAN
  2. Power-cycling every campus device without checking stack member identity
  3. Flooding all multicast across access VLANs as a replacement for routing
  4. Continuing incremental edits without retaining the prechange baseline

Explanation

Correct Answer

B:

Power-cycling every campus device without checking stack member identity. That shortcut fails because stack membership depends on hardware, software and topology compatibility. Instead, the appropriate approach is to reconcile the member identity, supported firmware and stack-link topology.

Incorrect Answers

A:

This misconception choice fits a different situation: A dual gateway pair both appear as active masters after a configuration change. It does not resolve the stated failure mode. For this case, the decisive misconception choice is to power-cycling every campus device without checking stack member identity.

C:

This misconception choice fits a different situation: Receivers on a remote multicast VLAN lose only the video stream after an uplink change. It does not resolve the stated failure mode. For this case, the decisive misconception choice is to power-cycling every campus device without checking stack member identity.

D:

This misconception choice fits a different situation: A new switch configuration destabilizes many services after change approval. It does not resolve the stated failure mode. For this case, the decisive misconception choice is to power-cycling every campus device without checking stack member identity.


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