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Question 580
A downstream VSX LAG has one peer missing VLAN 120 after a manual edit. What configuration must be aligned?
- Align VSX LAG and VLAN configuration
- Inspect VSX peer synchronization status
- Validate compatible peer releases
- Restore VSX inter-switch link
Explanation
Correct Answer
A:Ensure matching effective LAG and VLAN policy. Multi-chassis LAG member and allowed VLAN settings should be consistent across participating peers.
Incorrect Answers
B:Operational state should show healthy ISL, peer roles, keepalive and config sync before closure. But this does not address the case requirement to restore multi-chassis bundle consistency.
C:Supported VSX software versions and features must be checked after a staged upgrade. But this does not address the case requirement to restore multi-chassis bundle consistency.
D:ISL recovery brings back normal peer synchronization and required state traffic. But this does not address the case requirement to restore multi-chassis bundle consistency.
Question 581
One VSX peer has a noncompatible release after partial upgrade. What should be verified before reopening traffic?
- Inspect VSX peer synchronization status
- Validate compatible peer releases
- Investigate simultaneous peer isolation
- Restore VSX inter-switch link
Explanation
Correct Answer
B:Confirm the supported peer software compatibility and recovery sequence. Supported VSX software versions and features must be checked after a staged upgrade.
Incorrect Answers
A:Operational state should show healthy ISL, peer roles, keepalive and config sync before closure. But this does not address the case requirement to bring peers to a supported compatible release.
C:Loss of ISL and keepalive needs careful split-brain recovery following supported procedure. But this does not address the case requirement to bring peers to a supported compatible release.
D:ISL recovery brings back normal peer synchronization and required state traffic. But this does not address the case requirement to bring peers to a supported compatible release.
Question 582
An operator changed settings and sees the ISL up, but ignores out-of-sync alarms. What final check is required?
- Repair independent keepalive path
- Investigate simultaneous peer isolation
- Align VSX LAG and VLAN configuration
- Inspect VSX peer synchronization status
Explanation
Correct Answer
D:Inspect complete VSX synchronization and peer health. Operational state should show healthy ISL, peer roles, keepalive and config sync before closure.
Incorrect Answers
A:Keepalive must have routed reachability separate from the ISL failure domain. But this does not address the case requirement to verify restored operation beyond carrier.
B:Loss of ISL and keepalive needs careful split-brain recovery following supported procedure. But this does not address the case requirement to verify restored operation beyond carrier.
C:Multi-chassis LAG member and allowed VLAN settings should be consistent across participating peers. But this does not address the case requirement to verify restored operation beyond carrier.
Question 583
Keepalive fails because the management VRF has no peer route, although the ISL stays in sync. Which correction fits?
- Repair independent keepalive path
- Align VSX LAG and VLAN configuration
- Investigate simultaneous peer isolation
- Validate compatible peer releases
Explanation
Correct Answer
A:Restore keepalive VRF route reachability. Keepalive must have routed reachability separate from the ISL failure domain.
Incorrect Answers
B:Multi-chassis LAG member and allowed VLAN settings should be consistent across participating peers. But this does not address the case requirement to reinstate separate heartbeat communication.
C:Loss of ISL and keepalive needs careful split-brain recovery following supported procedure. But this does not address the case requirement to reinstate separate heartbeat communication.
D:Supported VSX software versions and features must be checked after a staged upgrade. But this does not address the case requirement to reinstate separate heartbeat communication.
Question 584
A VSX LAG member on the secondary peer is suspended due to inconsistent allowed VLANs. What should be corrected?
- Validate compatible peer releases
- Align VSX LAG and VLAN configuration
- Inspect VSX peer synchronization status
- Restore VSX inter-switch link
Explanation
Correct Answer
B:Synchronize the intended multi-chassis LAG attributes. Multi-chassis LAG member and allowed VLAN settings should be consistent across participating peers.
Incorrect Answers
A:Supported VSX software versions and features must be checked after a staged upgrade. But this does not address the case requirement to allow the downstream aggregate to form.
C:Operational state should show healthy ISL, peer roles, keepalive and config sync before closure. But this does not address the case requirement to allow the downstream aggregate to form.
D:ISL recovery brings back normal peer synchronization and required state traffic. But this does not address the case requirement to allow the downstream aggregate to form.
Question 585
ISL receive errors stop state synchronization and users notice brief LAG outages. Where should remediation start?
- Repair independent keepalive path
- Restore VSX inter-switch link
- Align VSX LAG and VLAN configuration
- Validate compatible peer releases
Explanation
Correct Answer
B:Repair the physical or logical ISL path before unrelated policy changes. ISL recovery brings back normal peer synchronization and required state traffic.
Incorrect Answers
A:Keepalive must have routed reachability separate from the ISL failure domain. But this does not address the case requirement to restore reliable VSX peer communication.
C:Multi-chassis LAG member and allowed VLAN settings should be consistent across participating peers. But this does not address the case requirement to restore reliable VSX peer communication.
D:Supported VSX software versions and features must be checked after a staged upgrade. But this does not address the case requirement to restore reliable VSX peer communication.
Question 586
An access switch became STP root after a priority mistake and distribution paths changed. What configuration should be restored?
- Restore intended STP root priority
- Configure edge BPDU protection
- Apply root guard at proper boundary
- Align MSTP region mapping
Explanation
Correct Answer
A:Keep designated root bridge election on intended aggregation devices. An intentional low-priority root at aggregation guides stable redundant path decisions.
Incorrect Answers
B:Use supported edge safeguards so unexpected switches cannot extend user-facing topology. But this does not address the case requirement to reestablish the planned root bridge.
C:Protect the intended STP root from unauthorized superior bridge claims. But this does not address the case requirement to reestablish the planned root bridge.
D:Matching name, revision and VLAN-instance mappings establish desired region relationships. But this does not address the case requirement to reestablish the planned root bridge.
Question 587
Two interconnected switches disagree on MSTP VLAN 70 mapping and create a region boundary. What correction helps?
- Align MSTP region mapping
- Configure edge BPDU protection
- Verify convergence and topology-change counters
- Apply root guard at proper boundary
Explanation
Correct Answer
A:Align the full MSTP region definition. Matching name, revision and VLAN-instance mappings establish desired region relationships.
Incorrect Answers
B:Use supported edge safeguards so unexpected switches cannot extend user-facing topology. But this does not address the case requirement to restore intended spanning tree instance coordination.
C:After repair check STP roles, blocked ports, broadcasts and event rates. But this does not address the case requirement to restore intended spanning tree instance coordination.
D:Protect the intended STP root from unauthorized superior bridge claims. But this does not address the case requirement to restore intended spanning tree instance coordination.
Question 588
A help desk finds two desk ports physically connected together and broadcasts multiplying. What immediate action should be taken?
- Verify convergence and topology-change counters
- Restore intended STP root priority
- Investigate and isolate accidental L2 loop
- Configure edge BPDU protection
Explanation
Correct Answer
C:Remove the accidental loop path safely. Disconnect or shut the unintended bridging connection and restore a loop-free physical topology.
Incorrect Answers
A:After repair check STP roles, blocked ports, broadcasts and event rates. But this does not address the case requirement to stop runaway Layer 2 flooding.
B:An intentional low-priority root at aggregation guides stable redundant path decisions. But this does not address the case requirement to stop runaway Layer 2 flooding.
D:Use supported edge safeguards so unexpected switches cannot extend user-facing topology. But this does not address the case requirement to stop runaway Layer 2 flooding.
Question 589
A protected user port should shut when an unmanaged bridge sends BPDUs. Which edge control should be in place?
- Investigate and isolate accidental L2 loop
- Configure edge BPDU protection
- Restore intended STP root priority
- Align MSTP region mapping
Explanation
Correct Answer
B:BPDU guard can block unauthorized bridge attachment. Use supported edge safeguards so unexpected switches cannot extend user-facing topology.
Incorrect Answers
A:Disconnect or shut the unintended bridging connection and restore a loop-free physical topology. But this does not address the case requirement to prevent loops introduced through endpoint ports.
C:An intentional low-priority root at aggregation guides stable redundant path decisions. But this does not address the case requirement to prevent loops introduced through endpoint ports.
D:Matching name, revision and VLAN-instance mappings establish desired region relationships. But this does not address the case requirement to prevent loops introduced through endpoint ports.
Question 590
A tenant switch advertises a superior BPDU toward the building root. Which boundary protection is relevant?
- Verify convergence and topology-change counters
- Restore intended STP root priority
- Apply root guard at proper boundary
- Configure edge BPDU protection
Explanation
Correct Answer
C:Root guard defends the chosen STP root across a controlled interface. Protect the intended STP root from unauthorized superior bridge claims.
Incorrect Answers
A:After repair check STP roles, blocked ports, broadcasts and event rates. But this does not address the case requirement to prevent unintended root takeover.
B:An intentional low-priority root at aggregation guides stable redundant path decisions. But this does not address the case requirement to prevent unintended root takeover.
D:Use supported edge safeguards so unexpected switches cannot extend user-facing topology. But this does not address the case requirement to prevent unintended root takeover.
HPE Network Switching Professional (HPE7-A08) Practice Tests