Question 320
At Alder Transit, the branch-to-campus connectivity team is preparing a staged station-switch migration. The operational constraint is a short overnight outage window. After a proposed fix, the team needs observable evidence that it resolved: An untagged management flow disappears across two trunk ports because each side expects a different native VLAN. Which result BEST demonstrates that this specific issue was resolved?
Explanation
Correct Answer
Captured ingress and egress frames have consistent VLAN classification and management reachability returns. This is the relevant acceptance observation for the reported issue: An untagged management flow disappears across two trunk ports because each side expects a different native VLAN. The intended corrective choice is: Reconcile the untagged/native VLAN expectations on both ends or use explicit tagging where supported. At Alder Transit, this outcome verifies actual operation under a short overnight outage window, rather than only a ticket marked complete.
Incorrect Answers
Both LAG members negotiate and enter the intended forwarding state. Such an observation would verify a separate issue: A two-member LAG forwards through one cable only; its peer reports no LACP partner on the other member. It would follow the distinct action: Compare LACP mode, bundle membership and interface compatibility on both devices. Here the reported failure is An untagged management flow disappears across two trunk ports because each side expects a different native VLAN. The decisive result for Alder Transit must instead be: Captured ingress and egress frames have consistent VLAN classification and management reachability returns.
Power allocation fits the camera class and the camera boots without denial counters increasing. Such an observation would verify a separate issue: A PoE-powered camera stays dark while the link is otherwise healthy; telemetry reports insufficient allocation budget. It would follow the distinct action: Diagnose available PoE budget and port power limits rather than changing VLAN or routing. Here the reported failure is An untagged management flow disappears across two trunk ports because each side expects a different native VLAN. The decisive result for Alder Transit must instead be: Captured ingress and egress frames have consistent VLAN classification and management reachability returns.
The OSPF neighbor reaches the appropriate adjacency state and expected prefixes appear. Such an observation would verify a separate issue: OSPF neighbors share a physical VLAN but one uses a different area number and adjacency never becomes Full. It would follow the distinct action: Compare OSPF area settings on the participating interfaces with the approved design. Here the reported failure is An untagged management flow disappears across two trunk ports because each side expects a different native VLAN. The decisive result for Alder Transit must instead be: Captured ingress and egress frames have consistent VLAN classification and management reachability returns.