The alternative targets certificate expiry monitoring, where healthy RF and RADIUS reachability cannot compensate for an expired or untrusted certificate that fails the authentication handshake. It does not establish the intended access-control change verification behavior described in the scenario.

That action—Stage AAA changes using representative client test groups and a recoverable policy path—is relevant to AAA change coordination. Identity changes impact access before network routing tests can begin; testing distinct client classes limits unintended lockouts. It does not correct the observed access-control change verification condition.

An idempotent workflow can be safely retried without proliferating duplicate objects or introducing inconsistent partial configuration. Design repeatable API updates to check existing state and converge on intended configuration. would address configuration API idempotence, but the reported facts instead point to access-control change verification. That change would leave the actual requirement unresolved.

The alternative targets certificate expiry monitoring, where healthy RF and RADIUS reachability cannot compensate for an expired or untrusted certificate that fails the authentication handshake. It does not establish the intended NAE event rules on AOS-CX behavior described in the scenario.

That action—Review per-client connection health and failure-stage telemetry in Aruba Central—is relevant to central client health visibility. An AP online indicator does not prove successful client onboarding; stage-specific events narrow diagnosis to radio, identity, addressing or portal dependencies. It does not correct the observed NAE event rules on AOS-CX condition.

Network device health does not establish application experience; end-to-end synthetic tests expose DNS, transport and service delays along the client path. Use UXI-style synthetic experience testing from representative user locations. would address UXI application tests, but the reported facts instead point to NAE event rules on AOS-CX. That change would leave the actual requirement unresolved.

Changing many dependent control planes at once obscures root causes and enlarges outage blast radius; staging supplies evidence and rollback points. Break high-risk campus migration into staged, independently validated change waves. would address change-risk classification, but the reported facts instead point to firmware feature-support planning. That change would leave the actual requirement unresolved.

The alternative targets OSPF area design, where area design controls link-state information distribution, and nonbackbone areas normally connect through Area 0 via appropriate routers. It does not establish the intended firmware feature-support planning behavior described in the scenario.

That action—Define explicit identity-to-role and role-to-policy mappings for campus clients—is relevant to role-based access decisions. Successful authentication proves identity; separate authorization decisions determine permitted destinations, services and segmentation. It does not correct the observed firmware feature-support planning condition.

A virtual first-hop gateway provides a stable client next-hop while authorized peers coordinate active forwarding after failure. The indicated result—a peer failure preserves client reachability to the virtual gateway and restores traffic within the approved recovery target—checks a different mechanism and would not confirm the required VRF route-context configuration outcome.

This would validate native VLAN alignment, not VRF route-context configuration. When connected trunk ports disagree about how untagged frames are classified, management and user traffic can land in unintended segments. It is therefore insufficient acceptance evidence for the reported condition.

That result—The relay forwards requests to the approved DHCP service and clients receive leases in the correct subnet—concerns DHCP relay on routed segments. Layer 3 boundaries do not normally forward client DHCP broadcasts without relay behavior; the helper target must also be reachable. It can be healthy even while the current VRF route-context configuration problem remains.

The alternative targets incorrect RADIUS role result, where a successful authentication indicates identity acceptance, while authorization attributes and local mapping determine permitted services. It does not establish the intended client isolation and peer access behavior described in the scenario.

That action—Apply DHCP snooping with trusted server-facing ports and untrusted client-facing ports—is relevant to unauthorized DHCP server. DHCP snooping restricts untrusted hosts from responding as servers and can help preserve legitimate addressing information on the VLAN. It does not correct the observed client isolation and peer access condition.

Authentication and authorization can work while accounting packets are missing; reliable session tracking needs the additional accounting path. Check RADIUS accounting events and collector reachability separately from login authorization. would address RADIUS accounting versus authorization, but the reported facts instead point to client isolation and peer access. That change would leave the actual requirement unresolved.

That result—Test rogue advertisements are blocked while approved router advertisements continue to reach clients—concerns IPv6 router-advertisement spoofing. IPv4 ARP safeguards do not inspect ICMPv6 router announcements; RA protection constrains unauthorized router information on client segments. It can be healthy even while the current unauthorized DHCP server problem remains.

Authentication and authorization can work while accounting packets are missing; reliable session tracking needs the additional accounting path. The indicated result—the AAA collector receives accurate start/stop accounting records for the authorized client session—checks a different mechanism and would not confirm the required unauthorized DHCP server outcome.

This would validate power-over-Ethernet failure, not unauthorized DHCP server. A data VLAN or management group cannot correct a switch power budget that denies the PD enough electrical power. It is therefore insufficient acceptance evidence for the reported condition.

Downlink strength from a powerful AP does not increase client transmit capability; asymmetric links and oversized cells can harm roaming. Adjust transmit power to balance bidirectional coverage and cell size. would address transmit-power balance, but the reported facts instead point to traffic policing versus shaping. That change would leave the actual requirement unresolved.

That action—Apply appropriate queue scheduling for delay-sensitive traffic at the congested interface—is relevant to voice queuing under load. QoS can prioritize selected packets when contention occurs but cannot create bandwidth; correct queue treatment reduces latency for critical applications. It does not correct the observed traffic policing versus shaping condition.

The alternative targets uplink oversubscription tuning, where access port sum can greatly exceed distribution bandwidth, so congestion and burst tolerance must be planned rather than inferred from port speed labels. It does not establish the intended traffic policing versus shaping behavior described in the scenario.

That result—The neighbor reaches Full and logs no authentication failures after the matched configuration is applied—concerns OSPF authentication mismatch. Routing protocol control packets may be rejected when authentication differs, even if underlying Layer 3 ping succeeds. It can be healthy even while the current asymmetric path enforcement problem remains.

DHCP snooping restricts untrusted hosts from responding as servers and can help preserve legitimate addressing information on the VLAN. The indicated result—offers from untrusted access ports are dropped and clients receive leases only from the approved DHCP service—checks a different mechanism and would not confirm the required asymmetric path enforcement outcome.

This would validate OSPF prefix advertisement omission, not asymmetric path enforcement. A healthy neighbor relationship does not imply every desired route is present; network statements, redistribution and policy can omit a prefix. It is therefore insufficient acceptance evidence for the reported condition.

This would validate EAP-TLS trust-chain failure, not captive portal redirect fault. EAP-TLS relies on a trusted certificate path; successful network reachability does not bypass expired or unknown issuing authorities. It is therefore insufficient acceptance evidence for the reported condition.

That result—The client resolves the intended address using the approved DNS server and connects using the application hostname—concerns DNS mistaken for routing failure. If IP connectivity works but hostname access fails, DNS queries, responses or resolver policy may be broken despite healthy network routes. It can be healthy even while the current captive portal redirect fault problem remains.

Roaming quality depends on usable overlap and timely client/security transitions; stationary speed tests cannot diagnose roaming interruption. The indicated result—a moving client transitions APs with acceptable interruption duration while retaining approved access—checks a different mechanism and would not confirm the required captive portal redirect fault outcome.

That action—Check optical module support, fiber path and received/transmit power diagnostics—is relevant to optics compatibility and signal levels. An unsupported or poorly coupled optical path prevents reliable Ethernet signalling regardless of correct routing or authentication configuration. It does not correct the observed access VLAN misassignment condition.

The alternative targets ACL deny versus service outage, where an ACL can block selected Layer 4 flows while other connectivity remains healthy; removing all controls is an unsafe shortcut. It does not establish the intended access VLAN misassignment behavior described in the scenario.

Mismatched physical link parameters can create collisions or errors despite a link-up status, so higher-layer policy changes cannot repair them. Verify compatible link speed, duplex and negotiation settings on both interface ends. would address duplex and speed negotiation, but the reported facts instead point to access VLAN misassignment. That change would leave the actual requirement unresolved.

The alternative targets RADIUS service resilience, where identity services become campus availability dependencies; redundant switches cannot authenticate users when all RADIUS paths fail. It does not establish the intended RF survey and building materials behavior described in the scenario.

Available port count does not establish available power; a switch can have free interfaces while its aggregate PoE budget is exhausted. Calculate the access-switch PoE budget including device draw and operational headroom. would address poE budget planning, but the reported facts instead point to RF survey and building materials. That change would leave the actual requirement unresolved.

That action—Size the wireless design for peak concurrent airtime demand rather than signal strength alone—is relevant to peak WLAN concurrency. RF coverage establishes reception, whereas channel contention and client airtime demand govern usable capacity in dense spaces. It does not correct the observed RF survey and building materials condition.