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Question 460
A campus switch has an SVI for each department but devices cannot reach another department even though both VLANs are healthy. What should the network engineer do to address this requirement?
- Remove or update the stale narrow route so the intended route can win
- Enable appropriate inter-VLAN routing and permit only the intended Layer 3 access
- Use an appropriate internal BGP path-preference policy and inspect best-path selection
- Ensure each loopback has valid underlay reachability and the intended source address
Explanation
Correct Answer
B:Different subnets need a routed path and authorized policy for communication. Working local VLAN membership alone does not establish inter-subnet forwarding.
Incorrect Answers
A:Longest-prefix match can override a broader learned route. By contrast, different subnets need a routed path and authorized policy for communication.
C:Local BGP attributes can steer the campus's own egress preference. It would not resolve the documented symptom; different subnets need a routed path and authorized policy for communication.
D:Stable BGP endpoint identity still depends on forwarding routes. In this situation, different subnets need a routed path and authorized policy for communication.
Question 461
A campus switch has an SVI for each department but devices cannot reach another department even though both VLANs are healthy. What should the team inspect to confirm the result?
- Capture RA contents and inspect client default-router entries
- Trace source gateway, route lookup and a permitted destination test
- Capture hello traffic and inspect interface VLAN tagging and OSPF logs
- Inspect hello packets and neighbor logs for area mismatch
Explanation
Correct Answer
B:Working local VLAN membership alone does not establish inter-subnet forwarding. Different subnets need a routed path and authorized policy for communication.
Incorrect Answers
A:The actual messages reveal whether route discovery is succeeding. The relevant technical distinction is that working local VLAN membership alone does not establish inter-subnet forwarding.
C:The evidence separates missing frames from protocol mismatch. It would not resolve the documented symptom; working local VLAN membership alone does not establish inter-subnet forwarding.
D:A direct capture identifies the advertised area values. By contrast, working local VLAN membership alone does not establish inter-subnet forwarding.
Question 462
A campus switch has an SVI for each department but devices cannot reach another department even though both VLANs are healthy. Which misconception is most likely to obstruct a correct fix?
- Increase administrative distance to force a router to enter Full state
- Add static routes and assume the OSPF area mismatch is repaired
- Assume two active SVIs automatically allow all interdepartment traffic despite routing or policy restrictions
- Redistribute every connected VLAN into eBGP to avoid missing a subnet
Explanation
Correct Answer
C:Layer 3 forwarding and access controls can still block sessions. Different subnets need a routed path and authorized policy for communication.
Incorrect Answers
A:Route preference cannot repair neighbor negotiation. The relevant technical distinction is that layer 3 forwarding and access controls can still block sessions.
B:Static forwarding can mask but not correct the broken adjacency. By contrast, layer 3 forwarding and access controls can still block sessions.
D:This can disclose private guest and management networks. Here, however, layer 3 forwarding and access controls can still block sessions.
Question 463
A campus switch has an SVI for each department but devices cannot reach another department even though both VLANs are healthy. What precaution is most important before the change is expanded?
- Maintain a reviewed route-leak matrix and regression tests
- Review overlapping prefixes and preserve rollback if a dependent application remains
- Test both approved and prohibited departmental flows after enabling routing
- Coordinate the area change across both sides and validate failover routes
Explanation
Correct Answer
C:Routing changes must not accidentally expose restricted hosts. Working local VLAN membership alone does not establish inter-subnet forwarding.
Incorrect Answers
A:Shared changes should not contaminate isolated routing tables. In this situation, routing changes must not accidentally expose restricted hosts.
B:A single static exception may still be needed for a legacy service. The relevant technical distinction is that routing changes must not accidentally expose restricted hosts.
D:One-sided routing changes can cause temporary loss of reachability. Here, however, routing changes must not accidentally expose restricted hosts.
Question 464
An access switch points all clients to a distribution gateway that has no route back to a newly added branch subnet. Which TWO actions together implement the required change and verify that it works? Choose TWO.
- Validate the intended backup after primary route withdrawal
- Trace a test session in both directions and check the destination route table
- Add the authorized return route or dynamic routing advertisement on the distribution layer
- Apply a reviewed inbound prefix list or route-map filter for that neighbor
- Correct route import/export rules and preserve the intended default per context
Explanation
Correct Answers
B:The missing return entry reveals why clients see timeouts. Successful forward traffic still requires a usable return path.
C:Successful forward traffic still requires a usable return path. The missing return entry reveals why clients see timeouts.
Incorrect Answers
A:A stored alternative should become usable under the expected failure. In this situation, route completeness should be tested as part of expansion.
D:Import policy prevents unwanted external reachability information. Here, however, successful forward traffic still requires a usable return path.
E:Imported defaults can redirect trusted traffic toward a less controlled network. It would not resolve the documented symptom; successful forward traffic still requires a usable return path.
Question 465
An access switch points all clients to a distribution gateway that has no route back to a newly added branch subnet. Which check most directly demonstrates the desired network behavior?
- Inspect advertised attributes and verify observed remote path preference
- Trace a test session in both directions and check the destination route table
- Capture hello traffic and inspect interface VLAN tagging and OSPF logs
- Compare OSPF path costs and the installed next hop for a representative prefix
Explanation
Correct Answer
B:The missing return entry reveals why clients see timeouts. Successful forward traffic still requires a usable return path.
Incorrect Answers
A:Local configuration does not guarantee how third-party ASes choose routes. It would not resolve the documented symptom; the missing return entry reveals why clients see timeouts.
C:The evidence separates missing frames from protocol mismatch. In this situation, the missing return entry reveals why clients see timeouts.
D:The route table verifies that the intended path wins. By contrast, the missing return entry reveals why clients see timeouts.
Question 466
An access switch points all clients to a distribution gateway that has no route back to a newly added branch subnet. Which assumption would be most misleading when investigating this situation?
- Assume AS-path prepending on advertisements solely controls the campus's own outbound path
- Change the access VLAN tag repeatedly even though the branch forward path is confirmed
- Change BGP local preference to repair OSPF database-description rejection
- Set an unconditional default advertisement and assume the internet never fails
Explanation
Correct Answer
B:VLAN changes do not create a missing upstream route. Successful forward traffic still requires a usable return path.
Incorrect Answers
A:Prepending generally influences other networks' inbound decisions. By contrast, vLAN changes do not create a missing upstream route.
C:BGP attributes are unrelated to OSPF MTU negotiation. It would not resolve the documented symptom; vLAN changes do not create a missing upstream route.
D:Peers may blackhole all outbound traffic through a dead gateway. The relevant technical distinction is that vLAN changes do not create a missing upstream route.
Question 467
An access switch points all clients to a distribution gateway that has no route back to a newly added branch subnet. Which safeguard best reduces the deployment risk in this case?
- Validate approved prefixes and loop-prevention behavior before enabling new boundaries
- Validate inbound failover and provider filtering before changing advertisements
- Verify loss tolerance before enabling aggressive detection on production links
- Review all affected gateway route tables before adding another branch
Explanation
Correct Answer
D:Route completeness should be tested as part of expansion. The missing return entry reveals why clients see timeouts.
Incorrect Answers
A:A small filter error can affect multiple sites. The relevant technical distinction is that route completeness should be tested as part of expansion.
B:Traffic engineering can be affected by external policies. Here, however, route completeness should be tested as part of expansion.
C:BFD settings must not convert transient jitter into route outages. By contrast, route completeness should be tested as part of expansion.
Question 468
Two AOS-CX distribution switches form an OSPF adjacency but a connected user subnet is absent from the peer table. What is the most appropriate first technical change?
- Advertise the intended prefix into the correct OSPF area with appropriate filters
- Restrict redistribution with reviewed prefix policies and source tags
- Advertise a conditional or monitored default route using a supported mechanism
- Correct route import/export rules and preserve the intended default per context
Explanation
Correct Answer
A:Adjacency does not imply every local route is eligible to be learned. The evidence distinguishes omitted advertisement from route preference.
Incorrect Answers
B:Uncontrolled mutual redistribution can reintroduce and amplify routes. In this situation, adjacency does not imply every local route is eligible to be learned.
C:The default should not persist when the upstream exit is unavailable. The relevant technical distinction is that adjacency does not imply every local route is eligible to be learned.
D:Imported defaults can redirect trusted traffic toward a less controlled network. Here, however, adjacency does not imply every local route is eligible to be learned.
Question 469
Two AOS-CX distribution switches form an OSPF adjacency but a connected user subnet is absent from the peer table. Which observation would best verify that the intended behavior is working?
- Probe permitted DNS and denied server flows while reviewing imported VRF routes
- Inspect advertised attributes and verify observed remote path preference
- Compare multiple traffic flows and next-hop byte counters during the same period
- Compare link-state database entries, route filters and installed prefixes
Explanation
Correct Answer
D:The evidence distinguishes omitted advertisement from route preference. Adjacency does not imply every local route is eligible to be learned.
Incorrect Answers
A:Both results confirm correct import scope. It would not resolve the documented symptom; the evidence distinguishes omitted advertisement from route preference.
B:Local configuration does not guarantee how third-party ASes choose routes. Here, however, the evidence distinguishes omitted advertisement from route preference.
C:Flow-level evidence explains imbalance better than one speed test. In this situation, the evidence distinguishes omitted advertisement from route preference.
Question 470
Two AOS-CX distribution switches form an OSPF adjacency but a connected user subnet is absent from the peer table. Which belief about the configuration should the team reject?
- Assume an OSPF Full neighbor state proves every attached VLAN prefix is advertised
- Tune local preference before confirming the BGP TCP session can open
- Assume the staff firewall policy alone prevents every routing mistake after default import
- Assume AS-path prepending on advertisements solely controls the campus's own outbound path
Explanation
Correct Answer
A:OSPF can form adjacency while specific networks are filtered or excluded. Adjacency does not imply every local route is eligible to be learned.
Incorrect Answers
B:Route attributes matter only after the session exchanges routes. It would not resolve the documented symptom; oSPF can form adjacency while specific networks are filtered or excluded.
C:A wrong route can still disrupt or misroute permitted traffic. By contrast, oSPF can form adjacency while specific networks are filtered or excluded.
D:Prepending generally influences other networks' inbound decisions. In this situation, oSPF can form adjacency while specific networks are filtered or excluded.
HPE Network Campus Access Professional (HPE7-A01) Practice Tests