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.

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 VRRP gateway resilience. That change would leave the actual requirement unresolved.

That action—Provision the supported VSF stack topology, member roles and intermember links consistently—is relevant to VSF member management. VSF presents supported physical members as a virtual switch while retaining operational requirements for healthy stacking links and member state. It does not correct the observed VRRP gateway resilience condition.

The alternative targets VSX keepalive isolation, where separate failure detection helps peers distinguish link disruption from peer loss, reducing the risk of harmful split-brain behavior. It does not establish the intended VRRP gateway resilience behavior described in the scenario.

Release-specific feature and compatibility constraints can break management or forwarding despite a successful image installation. Verify supported firmware interoperability across dependent devices and management tools. would address firmware compatibility dependency, but the reported facts instead point to firmware rollout staging. That change would leave the actual requirement unresolved.

That action—Monitor and renew EAP-TLS trust-chain certificates before their validity ends—is relevant to certificate expiry monitoring. Healthy RF and RADIUS reachability cannot compensate for an expired or untrusted certificate that fails the authentication handshake. It does not correct the observed firmware rollout staging condition.

The alternative targets topology and documentation currency, where operational documents are useful only when they reflect the running state and its change history; stale diagrams waste troubleshooting effort. It does not establish the intended firmware rollout staging behavior described in the scenario.

AOS-CX NAE provides locally evaluated telemetry/event logic; defining useful triggers matters more than merely enabling generic monitoring. The indicated result—a controlled threshold event generates the expected NAE observation or notification with recorded context—checks a different mechanism and would not confirm the required UXI application tests outcome.

This would validate NTP clock alignment, not UXI application tests. Accurate time supports certificate validation, event correlation and change records; unsynchronized clocks obscure cause and effect. It is therefore insufficient acceptance evidence for the reported condition.

That result—Client reports identify the actual failing association or onboarding stage for affected endpoints—concerns 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 can be healthy even while the current UXI application tests problem remains.

That action—Optimize cell sizing, channel reuse and client load distribution for crowded WLAN areas—is relevant to high-density WLAN airtime optimization. Wireless capacity depends on shared airtime and contention as well as signal quality; excessive power can enlarge overlap without adding usable spectrum. It does not correct the observed roaming voice latency condition.

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 roaming voice latency. That change would leave the actual requirement unresolved.

The alternative targets channel reuse planning, where co-channel neighbors share airtime when within interference range; thoughtful reuse can reduce contention without simply widening channels. It does not establish the intended roaming voice latency behavior described in the scenario.

OSPF requires compatible area identity, network type and essential adjacency parameters; IP reachability alone does not establish a neighbor. The indicated result—both peers enter Full adjacency and exchange the expected route information—checks a different mechanism and would not confirm the required 802.1X supplicant disabled outcome.

This would validate wireless DHCP failure stage, not 802.1X supplicant disabled. Client association and 802.1X success occur before address allocation; VLAN or relay faults can prevent DHCP without an RF fault. It is therefore insufficient acceptance evidence for the reported condition.

That result—Authentication logs and client diagnostics show a valid trusted handshake and correct certificate identity verification—concerns EAP-TLS trust-chain failure. EAP-TLS relies on a trusted certificate path; successful network reachability does not bypass expired or unknown issuing authorities. It can be healthy even while the current 802.1X supplicant disabled problem remains.

That action—Validate both allowed and forbidden flows after a security-policy change—is relevant to access-control change verification. Successful application traffic is only half of policy correctness; overbroad authorization can create exposure while the reported symptom appears resolved. It does not correct the observed config drift after manual overrides condition.

API access is a privileged operational interface; overbroad or leaked tokens can compromise configuration and monitoring data. Use narrowly authorized API credentials and protect their storage and renewal lifecycle. would address REST API authentication boundaries, but the reported facts instead point to config drift after manual overrides. That change would leave the actual requirement unresolved.

The alternative targets firmware compatibility dependency, where release-specific feature and compatibility constraints can break management or forwarding despite a successful image installation. It does not establish the intended config drift after manual overrides behavior described in the scenario.

The alternative targets SVI down due to VLAN state, where a configured SVI cannot act as the client gateway without operational Layer 2 underlay and correct interface state. It does not establish the intended longest-prefix route selection behavior described in the scenario.

Endpoints without a supported supplicant need a deliberate alternative classification mechanism, not general unrestricted VLAN access. Verify the authorized non-802.1X identity path and its restricted fallback enforcement. would address MAC authentication fallback fault, but the reported facts instead point to longest-prefix route selection. That change would leave the actual requirement unresolved.

That action—Verify the endpoint's default gateway and local first-hop reachability—is relevant to missing default gateway. Traffic bound for other subnets needs a reachable Layer 3 next hop; a functioning local broadcast domain does not provide routing. It does not correct the observed longest-prefix route selection condition.

When connected trunk ports disagree about how untagged frames are classified, management and user traffic can land in unintended segments. The indicated result—both ends of the link agree on intended tagged and untagged handling and the untagged test frame enters only the approved VLAN—checks a different mechanism and would not confirm the required trunk allowed VLAN list outcome.

That result—An unauthorized BPDU on the protected access port triggers the configured protective behavior without altering the campus root—concerns BPDU Guard at edge ports. Edge ports should not accept topology-control messages from unauthorized bridges; BPDU Guard can protect the switching domain by restricting offending links. It can be healthy even while the current trunk allowed VLAN list problem remains.

This would validate VRRP gateway resilience, not trunk allowed VLAN list. A virtual first-hop gateway provides a stable client next-hop while authorized peers coordinate active forwarding after failure. It is therefore insufficient acceptance evidence for the reported condition.

The alternative targets asymmetric path enforcement, where stateful firewalls can drop replies they did not see established; checking only the outbound route misses asymmetric forwarding. It does not establish the intended longest-prefix route selection behavior described in the scenario.

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 longest-prefix route selection. That change would leave the actual requirement unresolved.

That action—Check AP radio administrative state, band and regulatory channel support—is relevant to AP radio disabled or unsupported channel. Cloud device online status does not prove every radio is active or that target clients can discover the selected channel. It does not correct the observed longest-prefix route selection condition.

This would validate wired 802.1X port control, not guest captive-portal flow. An AAA server cannot enforce identity on a port whose access-control mechanism is disabled; unauthorized endpoints must receive a restricted result. It is therefore insufficient acceptance evidence for the reported condition.

VSF presents supported physical members as a virtual switch while retaining operational requirements for healthy stacking links and member state. The indicated result—the stack reports the expected active members and resilient forwarding across an intended member failure—checks a different mechanism and would not confirm the required guest captive-portal flow outcome.

That result—A representative approved device completes certificate-based enterprise authentication and receives its authorized network role—concerns 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 can be healthy even while the current guest captive-portal flow problem remains.