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Question 500
All upstream uplinks were on one member that lost power; remaining VSF members still forward local ports but cannot reach core. What design failure is revealed?
- VSF link failure
- VSF ring redundancy lost
- Downstream uplink concentrated on failed member
- Member numbering or cabling mismatch
Explanation
Correct Answer
C:Uplink failure domain was concentrated on one physical member. A stack can be healthy on surviving members yet lose all upstream links if physically concentrated.
Incorrect Answers
A:An intermember VSF link interruption may remove or partition members depending on topology. But this does not address the case requirement to locate lost aggregation connectivity.
B:A ring broken into a chain may stay operational but lose single-link resilience. But this does not address the case requirement to locate lost aggregation connectivity.
D:Incorrect VSF member IDs/links can stop intended stack formation. But this does not address the case requirement to locate lost aggregation connectivity.
Question 501
An added member stays offline because two devices share the same planned stack member ID. What configuration flaw fits?
- Member numbering or cabling mismatch
- VSF link failure
- Downstream uplink concentrated on failed member
- VSF ring redundancy lost
Explanation
Correct Answer
A:Duplicate identity or link mapping can block formation. Incorrect VSF member IDs/links can stop intended stack formation.
Incorrect Answers
B:An intermember VSF link interruption may remove or partition members depending on topology. But this does not address the case requirement to identify incorrect VSF member numbering.
C:A stack can be healthy on surviving members yet lose all upstream links if physically concentrated. But this does not address the case requirement to identify incorrect VSF member numbering.
D:A ring broken into a chain may stay operational but lose single-link resilience. But this does not address the case requirement to identify incorrect VSF member numbering.
Question 502
A VSF member's link state reports down but its local access ports remain powered. What fault should be inspected?
- Commander or standby role disruption
- VSF ring redundancy lost
- VSF link failure
- VSF unsupported member combination
Explanation
Correct Answer
C:The intermember VSF transport can fail independently of edge Ethernet. An intermember VSF link interruption may remove or partition members depending on topology.
Incorrect Answers
A:A control-role failure triggers supported VSF leadership change and transient convergence. But this does not address the case requirement to diagnose stack-link connectivity.
B:A ring broken into a chain may stay operational but lose single-link resilience. But this does not address the case requirement to diagnose stack-link connectivity.
D:An incompatible switch model or release cannot join a given stack configuration. But this does not address the case requirement to diagnose stack-link connectivity.
Question 503
One ring cable is removed and service continues; next cable loss will partition the stack. What condition now exists?
- VSF unsupported member combination
- Member numbering or cabling mismatch
- VSF link failure
- VSF ring redundancy lost
Explanation
Correct Answer
D:The stack has lost its redundant VSF ring path. A ring broken into a chain may stay operational but lose single-link resilience.
Incorrect Answers
A:An incompatible switch model or release cannot join a given stack configuration. But this does not address the case requirement to classify a single remaining intermember path.
B:Incorrect VSF member IDs/links can stop intended stack formation. But this does not address the case requirement to classify a single remaining intermember path.
C:An intermember VSF link interruption may remove or partition members depending on topology. But this does not address the case requirement to classify a single remaining intermember path.
Question 504
A cutover adds redundant core ports but both uplinks terminate on one VSF member. Which failure remains unprotected?
- VSF unsupported member combination
- VSF link failure
- Member numbering or cabling mismatch
- Downstream uplink concentrated on failed member
Explanation
Correct Answer
D:One member outage still removes the entire upstream path. A stack can be healthy on surviving members yet lose all upstream links if physically concentrated.
Incorrect Answers
A:An incompatible switch model or release cannot join a given stack configuration. But this does not address the case requirement to identify a single-member uplink bottleneck.
B:An intermember VSF link interruption may remove or partition members depending on topology. But this does not address the case requirement to identify a single-member uplink bottleneck.
C:Incorrect VSF member IDs/links can stop intended stack formation. But this does not address the case requirement to identify a single-member uplink bottleneck.
Question 505
Two VSX peers remain reachable through routed keepalive but report ISL down and config out-of-sync. Which link failure is present?
- ISL failure with keepalive present
- VSX peer software mismatch
- Keepalive path failure
- Simultaneous ISL and keepalive failure
Explanation
Correct Answer
A:The primary peer synchronization link has failed. The VSX inter-switch link is lost but independent keepalive can still report peer liveness.
Incorrect Answers
B:Incompatible peer software can affect formation or synchronized capabilities. But this does not address the case requirement to identify an ISL outage despite healthy keepalive.
C:Loss of keepalive alone removes one heartbeat path while normal ISL sync may remain healthy. But this does not address the case requirement to identify an ISL outage despite healthy keepalive.
D:Loss of both paths risks split-brain behavior and invokes supported split-recovery controls. But this does not address the case requirement to identify an ISL outage despite healthy keepalive.
Question 506
The VSX ISL reports healthy but periodic keepalive probes show no replies. Which health channel is missing?
- VSX peer status inspection
- Simultaneous ISL and keepalive failure
- ISL failure with keepalive present
- Keepalive path failure
Explanation
Correct Answer
D:The separate liveness path has failed while peer synchronization continues. Loss of keepalive alone removes one heartbeat path while normal ISL sync may remain healthy.
Incorrect Answers
A:VSX status outputs identify ISL, peer roles, keepalive and sync operational state. But this does not address the case requirement to identify a keepalive transport fault.
B:Loss of both paths risks split-brain behavior and invokes supported split-recovery controls. But this does not address the case requirement to identify a keepalive transport fault.
C:The VSX inter-switch link is lost but independent keepalive can still report peer liveness. But this does not address the case requirement to identify a keepalive transport fault.
Question 507
Both the VSX ISL and independent keepalive fail simultaneously. What dangerous peer condition may result?
- Simultaneous ISL and keepalive failure
- ISL failure with keepalive present
- VSX LAG sync mismatch
- VSX peer software mismatch
Explanation
Correct Answer
A:Loss of both failure-detection paths can create split-brain risk. Loss of both paths risks split-brain behavior and invokes supported split-recovery controls.
Incorrect Answers
B:The VSX inter-switch link is lost but independent keepalive can still report peer liveness. But this does not address the case requirement to recognize simultaneous peer isolation.
C:Inconsistent selected LAG or VLAN attributes can keep a multi-chassis LAG from becoming healthy. But this does not address the case requirement to recognize simultaneous peer isolation.
D:Incompatible peer software can affect formation or synchronized capabilities. But this does not address the case requirement to recognize simultaneous peer isolation.
Question 508
A VSX peer runs an incompatible version after an incomplete upgrade and refuses expected sync. What platform condition matters?
- Keepalive path failure
- ISL failure with keepalive present
- VSX peer software mismatch
- Simultaneous ISL and keepalive failure
Explanation
Correct Answer
C:Peer release compatibility can affect synchronized behavior. Incompatible peer software can affect formation or synchronized capabilities.
Incorrect Answers
A:Loss of keepalive alone removes one heartbeat path while normal ISL sync may remain healthy. But this does not address the case requirement to identify VSX software version mismatch.
B:The VSX inter-switch link is lost but independent keepalive can still report peer liveness. But this does not address the case requirement to identify VSX software version mismatch.
D:Loss of both paths risks split-brain behavior and invokes supported split-recovery controls. But this does not address the case requirement to identify VSX software version mismatch.
Question 509
A dual-homed access switch sees only one active member of its VSX LAG after VLAN policy changed on one peer. What class of fault fits?
- VSX LAG sync mismatch
- VSX peer software mismatch
- ISL failure with keepalive present
- Simultaneous ISL and keepalive failure
Explanation
Correct Answer
A:Multi-chassis LAG configuration inconsistency can suspend a path. Inconsistent selected LAG or VLAN attributes can keep a multi-chassis LAG from becoming healthy.
Incorrect Answers
B:Incompatible peer software can affect formation or synchronized capabilities. But this does not address the case requirement to identify mismatched VSX LAG settings.
C:The VSX inter-switch link is lost but independent keepalive can still report peer liveness. But this does not address the case requirement to identify mismatched VSX LAG settings.
D:Loss of both paths risks split-brain behavior and invokes supported split-recovery controls. But this does not address the case requirement to identify mismatched VSX LAG settings.
Question 510
Operators need to know whether ISL, keepalive or config sync failed after an alarm. What command output class is most decisive?
- Simultaneous ISL and keepalive failure
- VSX LAG sync mismatch
- VSX peer status inspection
- VSX peer software mismatch
Explanation
Correct Answer
C:VSX operational status distinguishes peer health dimensions. VSX status outputs identify ISL, peer roles, keepalive and sync operational state.
Incorrect Answers
A:Loss of both paths risks split-brain behavior and invokes supported split-recovery controls. But this does not address the case requirement to inspect exact peer and link state.
B:Inconsistent selected LAG or VLAN attributes can keep a multi-chassis LAG from becoming healthy. But this does not address the case requirement to inspect exact peer and link state.
D:Incompatible peer software can affect formation or synchronized capabilities. But this does not address the case requirement to inspect exact peer and link state.
HPE Network Switching Professional (HPE7-A08) Practice Tests