Traffic bound for other subnets needs a reachable Layer 3 next hop; a functioning local broadcast domain does not provide routing. Verify the endpoint's default gateway and local first-hop reachability. would address missing default gateway, but the reported facts instead point to OSPF authentication mismatch. That change would leave the actual requirement unresolved.

The alternative targets access VLAN misassignment, where the VLAN used for an untagged or dynamically authorized session determines its broadcast and DHCP context; physical link state is not enough. It does not establish the intended OSPF authentication mismatch behavior described in the scenario.

That action—Check VLAN operational state and active interface membership when an SVI is down—is relevant to SVI down due to VLAN state. A configured SVI cannot act as the client gateway without operational Layer 2 underlay and correct interface state. It does not correct the observed OSPF authentication mismatch condition.

The alternative targets change-window and rollback requirements, where a planned change must include dependencies and a reversible path because a correct configuration can still disrupt business services during transition. It does not establish the intended RF survey and building materials behavior described in the scenario.

That action—Design dual-homed access uplinks with suitable link aggregation and loop prevention for the selected platform—is relevant to dual-homed downstream aggregation. Hardware redundancy is ineffective if every downstream path still depends on one forwarding node or unsound Layer 2 topology. It does not correct the observed RF survey and building materials condition.

Missing uplink, power, VLAN, routing and identity dependencies cause apparently successful device replacements to disconnect applications or clients unexpectedly. Inventory existing physical, logical and service dependencies before finalizing the change sequence. would address inventory and dependency discovery, but the reported facts instead point to RF survey and building materials. That change would leave the actual requirement unresolved.

That action—Apply appropriate IPv6 RA protection on untrusted access ports—is relevant to IPv6 router-advertisement spoofing. IPv4 ARP safeguards do not inspect ICMPv6 router announcements; RA protection constrains unauthorized router information on client segments. It does not correct the observed physical layer link fault condition.

Rapid MAC moves and broadcast amplification indicate switching topology instability, not a problem fixed by adding a default route. Investigate Layer 2 loops and unstable MAC learning before changing IP routing. would address MAC learning and unintended loops, but the reported facts instead point to physical layer link fault. That change would leave the actual requirement unresolved.

The alternative targets LACP partner mismatch, where LACP only selects compatible links for aggregation; forcing an incompatible member can create unexpected hashing or forwarding behavior. It does not establish the intended physical layer link fault behavior described in the scenario.

The alternative targets device group selection, where a device must receive intent appropriate to its product family and role; the wrong group or persona can apply unrelated settings or reject configuration. It does not establish the intended management connectivity and DNS behavior described in the scenario.

Gateway responsibilities such as tunnel termination and role enforcement depend on the chosen software architecture and supported role. Provision each gateway with a supported network role that matches its forwarding architecture. would address gateway role deployment, but the reported facts instead point to management connectivity and DNS. That change would leave the actual requirement unresolved.

That action—Configure an enterprise WLAN with appropriate EAP-TLS and trusted RADIUS/certificate services—is relevant to corporate EAP-TLS SSID. EAP-TLS verifies certificate-based identities through the configured authentication system; a shared PSK does not give per-device certificate identity. It does not correct the observed management connectivity and DNS condition.

This would validate dual-homed downstream aggregation, not low-level port map. Hardware redundancy is ineffective if every downstream path still depends on one forwarding node or unsound Layer 2 topology. It is therefore insufficient acceptance evidence for the reported condition.

An AP advertising a network does not prove that clients can authenticate, receive approved privileges or maintain application continuity while moving. The indicated result—test records show representative clients join, receive correct roles, roam and reach only approved services—checks a different mechanism and would not confirm the required low-level port map outcome.

That result—The compatibility matrix references the correct device families and supported release before installation begins—concerns firmware feature-support planning. Product capabilities and configuration syntax depend on supported hardware and software releases; a feature described in another model's guide may be unavailable. It can be healthy even while the current low-level port map problem remains.

The alternative targets configuration backup before changes, where reversible change management requires knowing the previous effective state, not merely retaining a screenshot of intended edits. It does not establish the intended access-control change verification behavior described in the scenario.

Identity changes impact access before network routing tests can begin; testing distinct client classes limits unintended lockouts. Stage AAA changes using representative client test groups and a recoverable policy path. would address AAA change coordination, but the reported facts instead point to access-control change verification. That change would leave the actual requirement unresolved.

That action—Use UXI-style synthetic experience testing from representative user locations—is relevant to UXI application tests. Network device health does not establish application experience; end-to-end synthetic tests expose DNS, transport and service delays along the client path. It does not correct the observed access-control change verification condition.

This would validate REST API authentication boundaries, not network asset lifecycle. API access is a privileged operational interface; overbroad or leaked tokens can compromise configuration and monitoring data. It is therefore insufficient acceptance evidence for the reported condition.

Management APIs may return segmented data or throttle callers, so automation must recognize incomplete and transient outcomes instead of silently succeeding. The indicated result—a controlled test retrieves all expected records and handles pagination or retryable response codes without data loss—checks a different mechanism and would not confirm the required network asset lifecycle outcome.

That result—The approved compatibility matrix and staged test confirm dependent components function on the selected release set—concerns firmware compatibility dependency. Release-specific feature and compatibility constraints can break management or forwarding despite a successful image installation. It can be healthy even while the current network asset lifecycle problem remains.

That result—The user subnet remains advertised by the routing process while no neighbor adjacency forms on the protected access VLAN—concerns OSPF passive interfaces. A passive interface can advertise its connected prefix through the process while avoiding unwanted OSPF hello exchanges toward endpoints. It can be healthy even while the current VSF member management problem remains.

This would validate LACP bundled links, not VSF member management. Aggregated links require compatible control and interface parameters; mismatched LACP or VLAN settings can prevent members from joining. It is therefore insufficient acceptance evidence for the reported condition.

Separate failure detection helps peers distinguish link disruption from peer loss, reducing the risk of harmful split-brain behavior. The indicated result—an isolated link-failure exercise records the intended peer health state and avoids duplicate active forwarding—checks a different mechanism and would not confirm the required VSF member management outcome.

This would validate traffic policing versus shaping, not periodic baseline refresh. Traffic shaping delays packets to smooth bursts, whereas policing enforces a rate by dropping or remarking nonconforming traffic; operational tradeoffs differ. It is therefore insufficient acceptance evidence for the reported condition.

Optimization claims require equivalent loads, test methods and service metrics before and after; otherwise changes in demand confound comparison. The indicated result—the report contrasts like-for-like baseline and post-change throughput, latency, retries and error statistics—checks a different mechanism and would not confirm the required periodic baseline refresh outcome.

That result—Post-change tests show better permitted-traffic performance and unchanged denial of prohibited flows—concerns security-preserving optimization. A performance gain is not acceptable if it weakens required access boundaries; improvements must meet both service and security acceptance criteria. It can be healthy even while the current periodic baseline refresh problem remains.

The alternative targets security-preserving optimization, where a performance gain is not acceptable if it weakens required access boundaries; improvements must meet both service and security acceptance criteria. It does not establish the intended optimization with rollback behavior described in the scenario.

Resilience depends on recovery behavior, routing/bridging convergence and application tolerance, not the number of installed redundant devices. Measure convergence and application recovery time under designated failure tests. would address failure recovery time objective, but the reported facts instead point to optimization with rollback. That change would leave the actual requirement unresolved.

That action—Use RF spectrum evidence to locate and mitigate non-Wi-Fi interference—is relevant to interference spectrum diagnosis. Non-802.11 emitters can occupy channel energy without appearing as normal Wi-Fi neighbors; channel changes or source mitigation need measured evidence. It does not correct the observed optimization with rollback condition.

This would validate multicast receiver handling, not VRRP gateway resilience. IGMP membership information lets switches constrain Layer 2 multicast distribution instead of flooding traffic indiscriminately. It is therefore insufficient acceptance evidence for the reported condition.

VLAN configuration creates Layer 2 separation; inter-subnet communication requires appropriate Layer 3 interfaces, addressing and policy. The indicated result—representative clients can reach their configured gateways and only permitted inter-VLAN routes operate—checks a different mechanism and would not confirm the required VRRP gateway resilience outcome.

That result—The user subnet remains advertised by the routing process while no neighbor adjacency forms on the protected access VLAN—concerns OSPF passive interfaces. A passive interface can advertise its connected prefix through the process while avoiding unwanted OSPF hello exchanges toward endpoints. It can be healthy even while the current VRRP gateway resilience problem remains.