A configured SVI cannot act as the client gateway without operational Layer 2 underlay and correct interface state. Check VLAN operational state and active interface membership when an SVI is down. would address SVI down due to VLAN state, but the reported facts instead point to roaming reassociation delay. That change would leave the actual requirement unresolved.

The alternative targets EAP-TLS trust-chain failure, where EAP-TLS relies on a trusted certificate path; successful network reachability does not bypass expired or unknown issuing authorities. It does not establish the intended roaming reassociation delay behavior described in the scenario.

That action—Compare RADIUS authorization attributes with actual assigned session role and policy—is relevant to incorrect RADIUS role result. A successful authentication indicates identity acceptance, while authorization attributes and local mapping determine permitted services. It does not correct the observed roaming reassociation delay condition.

This would validate IPv6 router-advertisement spoofing, not firmware-induced configuration drift. IPv4 ARP safeguards do not inspect ICMPv6 router announcements; RA protection constrains unauthorized router information on client segments. It is therefore insufficient acceptance evidence for the reported condition.

Scoped configuration precedence can explain isolated divergence; changing the shared profile again can unintentionally impact healthy devices. The indicated result—the effective device value is traced to its controlling scope and the corrected override restores intended behavior—checks a different mechanism and would not confirm the required firmware-induced configuration drift outcome.

That result—A moving client transitions APs with acceptable interruption duration while retaining approved access—concerns roaming reassociation delay. Roaming quality depends on usable overlap and timely client/security transitions; stationary speed tests cannot diagnose roaming interruption. It can be healthy even while the current firmware-induced configuration drift problem remains.

The alternative targets classic Central site versus group, where classic Central uses groups to distribute shared configuration while sites provide physical-location organization, so modifying location alone need not change running intent. It does not establish the intended management connectivity and DNS behavior described in the scenario.

That action—Assign devices to compatible Central groups or functions before applying shared configurations—is relevant to device group selection. 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 correct the observed management connectivity and DNS condition.

VSX peers retain independent control planes and only designated supported feature sets synchronize; unchecked settings may diverge. Configure and verify explicit VSX synchronization for supported shared features while managing independent settings separately. would address VSX peer synchronization, but the reported facts instead point to management connectivity and DNS. That change would leave the actual requirement unresolved.

This would validate device group selection, not VRF route-context configuration. 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 is therefore insufficient acceptance evidence for the reported condition.

That result—The VLAN is present on each relevant trunk and authenticated client traffic traverses the expected path—concerns trunk allowed VLAN list. A VLAN's existence on each switch is insufficient if the inter-switch trunk omits it, so frames cannot traverse the missing membership. It can be healthy even while the current VRF route-context configuration problem remains.

A route must identify the desired prefix and a valid forwarding path; a configured but unresolved next hop does not deliver packets. The indicated result—the switch routing table selects the intended prefix and traffic reaches the remote subnet over the verified next hop—checks a different mechanism and would not confirm the required VRF route-context configuration outcome.

That action—Configure compatible LACP membership, port settings and partner negotiation at both ends—is relevant to LACP bundled links. Aggregated links require compatible control and interface parameters; mismatched LACP or VLAN settings can prevent members from joining. It does not correct the observed template variable rendering condition.

The alternative targets gateway role deployment, where gateway responsibilities such as tunnel termination and role enforcement depend on the chosen software architecture and supported role. It does not establish the intended template variable rendering behavior described in the scenario.

A device must receive intent appropriate to its product family and role; the wrong group or persona can apply unrelated settings or reject configuration. Assign devices to compatible Central groups or functions before applying shared configurations. would address device group selection, but the reported facts instead point to template variable rendering. That change would leave the actual requirement unresolved.

The alternative targets SSID-to-forwarding path consistency, where wireless association is only the first hop; downstream tunnel, VLAN and gateway mappings must agree for application access. It does not establish the intended corporate EAP-TLS SSID behavior described in the scenario.

That action—Configure compatible LACP membership, port settings and partner negotiation at both ends—is relevant to LACP bundled links. Aggregated links require compatible control and interface parameters; mismatched LACP or VLAN settings can prevent members from joining. It does not correct the observed corporate EAP-TLS SSID condition.

Wireless features depend on the wired uplink and power available to the AP; sufficient coverage does not prove the device is operating at full capacity. Verify the AP's negotiated Ethernet link and available PoE power meet its installed feature requirements. would address AP uplink power and negotiation, but the reported facts instead point to corporate EAP-TLS SSID. That change would leave the actual requirement unresolved.

That action—Compare name resolution with direct IP reachability to isolate the DNS dependency—is relevant to 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 does not correct the observed longest-prefix route selection condition.

A healthy neighbor relationship does not imply every desired route is present; network statements, redistribution and policy can omit a prefix. Verify that the intended connected subnet is advertised and permitted by OSPF configuration and filters. would address OSPF prefix advertisement omission, but the reported facts instead point to longest-prefix route selection. That change would leave the actual requirement unresolved.

The alternative targets EAP-TLS trust-chain failure, where EAP-TLS relies on a trusted certificate path; successful network reachability does not bypass expired or unknown issuing authorities. It does not establish the intended longest-prefix route selection behavior described in the scenario.

Overly aggressive limits can discard necessary discovery traffic, while absent protection permits broadcasts to overwhelm forwarding capacity. The indicated result—peak legitimate discovery succeeds and a simulated excessive broadcast rate triggers the intended bounded protection—checks a different mechanism and would not confirm the required uplink oversubscription tuning outcome.

That result—Queue counters and packet markings confirm trusted voice traffic receives priority while guest bulk flows remain appropriately classified—concerns trust and QoS marking boundary. Blindly trusting endpoint markings lets untrusted traffic dominate queues; classification must reflect approved service importance. It can be healthy even while the current uplink oversubscription tuning problem remains.

This would validate optimization with rollback, not uplink oversubscription tuning. A change may help one metric while degrading another; phased deployment and recovery thresholds protect production service continuity. It is therefore insufficient acceptance evidence for the reported condition.

That action—Configure storm-control thresholds based on observed legitimate broadcast levels and incident risk—is relevant to storm control tuning. Overly aggressive limits can discard necessary discovery traffic, while absent protection permits broadcasts to overwhelm forwarding capacity. It does not correct the observed security-preserving optimization condition.

The alternative targets baseline before optimization, where optimization claims require equivalent loads, test methods and service metrics before and after; otherwise changes in demand confound comparison. It does not establish the intended security-preserving optimization behavior described in the scenario.

Right-sized operation reduces unnecessary resource use, but energy or capacity savings must not remove availability when users actually need the network. Adjust supported power or capacity policies according to measured usage while preserving peak service requirements. would address energy and utilization efficiency, but the reported facts instead point to security-preserving optimization. That change would leave the actual requirement unresolved.

IGMP membership information lets switches constrain Layer 2 multicast distribution instead of flooding traffic indiscriminately. The indicated result—multicast reaches registered subscriber ports while nonmember access ports show no unnecessary stream traffic—checks a different mechanism and would not confirm the required route redistribution filters outcome.

That result—The stack reports the expected active members and resilient forwarding across an intended member failure—concerns VSF member management. VSF presents supported physical members as a virtual switch while retaining operational requirements for healthy stacking links and member state. It can be healthy even while the current route redistribution filters problem remains.

This would validate WPA3 and legacy clients, not route redistribution filters. WLAN security changes can exclude devices with unsupported cipher, authentication or protected-management-frame capabilities. It is therefore insufficient acceptance evidence for the reported condition.

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.