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Use sensor, PSU, fan and PoE state to identify hardware conditions that threaten switching service continuity. This action instead applies to Environmental and power health monitoring. Environmental alarms can cause service degradation even when interface and routing configurations have not changed. It does not directly resolve the controlling requirement. The targeted response is: Compare deployed AOS-CX configurations against approved Aruba Central templates or version-controlled intended state and record exceptions. Scenario: A scheduled audit reports a switch compliant solely because it checked group membership, not actual effective settings.

Archive switch configs with encryption, retention and least-privilege access while avoiding uncontrolled exposure of shared credentials or tokens. This action instead applies to Safe configuration archiving and secret handling. Configuration histories may contain secrets and management details, so backup security is part of switch operations. It does not directly resolve the controlling requirement. The targeted response is: Compare deployed AOS-CX configurations against approved Aruba Central templates or version-controlled intended state and record exceptions. Scenario: A scheduled audit reports a switch compliant solely because it checked group membership, not actual effective settings.

Separate OSPF adjacency failure from absent advertised prefixes by inspecting both neighbor state and routing tables. This action instead applies to OSPF neighbor and route missing root cause. OSPF FULL is a control-plane milestone; missing connected networks or rejected LSAs can still prevent reachability. It does not directly resolve the controlling requirement. The targeted response is: Compare deployed AOS-CX configurations against approved Aruba Central templates or version-controlled intended state and record exceptions. Scenario: A scheduled audit reports a switch compliant solely because it checked group membership, not actual effective settings.

Use approved MAC authentication or critical-role treatment for devices lacking supplicants with explicit limited privileges and monitoring. This action instead applies to MAC authentication and critical access fallback. MAB is identity based on a spoofable identifier, so its exception path requires narrow permissions and accountability. It does not directly resolve the controlling requirement. The targeted response is: Configure EAP-based access authentication with correct RADIUS reachability, credentials, switch identity and port role behavior. Scenario: An endpoint completes EAP but receives no usable data access due to a mismatched authorization role.

Correct the precise RADIUS, EAP or role-download fault while retaining least-privilege policy and test-deny behavior. This action instead applies to Authentication and RADIUS remediation discipline. Replacing an authentication outage with unrestricted open ports is not equivalent to a secure remediation. It does not directly resolve the controlling requirement. The targeted response is: Configure EAP-based access authentication with correct RADIUS reachability, credentials, switch identity and port role behavior. Scenario: An endpoint completes EAP but receives no usable data access due to a mismatched authorization role.

Apply supported downloadable user roles or dynamic segmentation so authenticated client classes receive consistent least-privilege network access. This action instead applies to Dynamic segmentation downloadable roles policy. Identity-based roles and VLAN assignment are separate configuration layers; a role must download and enforce successfully. It does not directly resolve the controlling requirement. The targeted response is: Configure EAP-based access authentication with correct RADIUS reachability, credentials, switch identity and port role behavior. Scenario: An endpoint completes EAP but receives no usable data access due to a mismatched authorization role.

Integrate the network with approved Central monitoring and incident workflows using supported device enrollment, health data and role-scoped access. This action instead applies to Aruba Central and switch telemetry integration. Monitoring integration does not automatically enforce remediation; event relevance and permitted access need validation. It does not directly resolve the controlling requirement. The targeted response is: Repair LACP member identity or negotiation mismatches on both peers rather than converting a redundant uplink into unmonitored standalone links. Scenario: An administrator proposes turning off LACP on one peer only to make a failed member green.

Form a remediation sequence from observed baseline, known-good checkpoint, expected impact and verification steps rather than changing multiple controls at once. This action instead applies to Minimal-change rollback and restoration plan. A remediation is reliable only when its impact and reversal are testable, not because symptoms disappear temporarily. It does not directly resolve the controlling requirement. The targeted response is: Repair LACP member identity or negotiation mismatches on both peers rather than converting a redundant uplink into unmonitored standalone links. Scenario: An administrator proposes turning off LACP on one peer only to make a failed member green.

Trace a host's local IP, mask, gateway and ARP resolution before attributing reachability failure to routing protocols. This action instead applies to IP addressing subnet and gateway mismatch. Incorrect subnet or default gateway settings can break connectivity even while VLAN forwarding remains healthy. It does not directly resolve the controlling requirement. The targeted response is: Repair LACP member identity or negotiation mismatches on both peers rather than converting a redundant uplink into unmonitored standalone links. Scenario: An administrator proposes turning off LACP on one peer only to make a failed member green.

Correct the precise RADIUS, EAP or role-download fault while retaining least-privilege policy and test-deny behavior. This action instead applies to Authentication and RADIUS remediation discipline. Replacing an authentication outage with unrestricted open ports is not equivalent to a secure remediation. It does not directly resolve the controlling requirement. The targeted response is: Repair a proven VRF interface assignment or route leak rule while preventing unrelated tenant reachability. Scenario: An internal app loses access after an SVI is migrated into the management VRF inadvertently.

Correlate performance alarms with actual interface, application and configuration history before treating a reporting threshold as a hardware failure. This action instead applies to Telemetry false-positive and baseline drift analysis. A dashboard spike may be a sampling or threshold artifact; monitoring values require context and reliable collection. It does not directly resolve the controlling requirement. The targeted response is: Repair a proven VRF interface assignment or route leak rule while preventing unrelated tenant reachability. Scenario: An internal app loses access after an SVI is migrated into the management VRF inadvertently.

Use sensor, PSU, fan and PoE state to identify hardware conditions that threaten switching service continuity. This action instead applies to Environmental and power health monitoring. Environmental alarms can cause service degradation even when interface and routing configurations have not changed. It does not directly resolve the controlling requirement. The targeted response is: Repair a proven VRF interface assignment or route leak rule while preventing unrelated tenant reachability. Scenario: An internal app loses access after an SVI is migrated into the management VRF inadvertently.

Validate AOS-CX configuration templates against supported platform variants and preproduction devices before broad rollout. This action instead applies to Config template test and promotion pipeline. Templating improves consistency but unscoped variables can replicate errors across entire fleets. It does not directly resolve the controlling requirement. The targeted response is: Recover a failed AOS-CX switch with supported image, saved configuration, verified physical inventory and secure credential restoration. Scenario: A recovered switch rejoins the wrong Central group and receives unrelated site VLAN settings.

Restore an OSPF adjacency or missing advertisement using targeted parameter, area or redistribution corrections with route verification. This action instead applies to OSPF route recovery with controlled scope. A broad redistribution change can leak unwanted networks; OSPF repair should target the proven mismatch. It does not directly resolve the controlling requirement. The targeted response is: Recover a failed AOS-CX switch with supported image, saved configuration, verified physical inventory and secure credential restoration. Scenario: A recovered switch rejoins the wrong Central group and receives unrelated site VLAN settings.

Maintain approved maintenance records, affected path inventory, user notices and postchange validation for recurring wired network work. This action instead applies to Scheduled change window and impact communication. Maintenance success depends on operational coordination as well as command execution and hardware status. It does not directly resolve the controlling requirement. The targeted response is: Recover a failed AOS-CX switch with supported image, saved configuration, verified physical inventory and secure credential restoration. Scenario: A recovered switch rejoins the wrong Central group and receives unrelated site VLAN settings.

Compare signed requirement matrix, design revision, target firmware, selected feature and test result IDs. These checks can help with Requirements-to-configuration traceability matrix, but they are not the most discriminating first evidence here. Examine: Check interface-to-interface maps, VSX ISL or VSF links, keepalive transport, LAG membership and independent power routes. Scenario: An access stacking diagram omits the final member's return link despite requiring a ring topology.

Compare slot inventory, supported modules, forwarding capacity, supervisor architecture, footprint, and lifecycle support. These checks can help with Modular core chassis versus fixed form factor, but they are not the most discriminating first evidence here. Examine: Check interface-to-interface maps, VSX ISL or VSF links, keepalive transport, LAG membership and independent power routes. Scenario: An access stacking diagram omits the final member's return link despite requiring a ring topology.

Review Central group type, effective configuration, variable bindings, supported template syntax and local override restrictions. These checks can help with Central UI group versus template configuration scope, but they are not the most discriminating first evidence here. Examine: Check interface-to-interface maps, VSX ISL or VSF links, keepalive transport, LAG membership and independent power routes. Scenario: An access stacking diagram omits the final member's return link despite requiring a ring topology.

Compare installation photos, running and startup configs, topology neighbors, asset inventory and exception log. These checks can help with Change documentation and as-built reconciliation, but they are not the most discriminating first evidence here. Examine: Review maintenance approval, baselines, device access, console recovery, config backups, support contacts and rollback triggers. Scenario: A migration team declares success after link LEDs turn green without testing routed service reachability.

Inspect local/peer trunk configuration, permitted VLAN list, MAC learning and DHCP/gateway tests. These checks can help with Correct trunk VLAN remediation, but they are not the most discriminating first evidence here. Examine: Review maintenance approval, baselines, device access, console recovery, config backups, support contacts and rollback triggers. Scenario: A migration team declares success after link LEDs turn green without testing routed service reachability.

Check powered endpoints, PoE class, uplink optics, stack or VSX requirements, interfaces and supported software for candidate models. These checks can help with Campus access versus aggregation switch portfolio fit, but they are not the most discriminating first evidence here. Examine: Review maintenance approval, baselines, device access, console recovery, config backups, support contacts and rollback triggers. Scenario: A migration team declares success after link LEDs turn green without testing routed service reachability.

Inspect interface admin/oper state, optic transmit/receive power, CRC/FCS counters, negotiated speed and neighbor light levels. This step pertains to Physical link failure diagnostics but is not one of the two complementary decisions in this case. The required response and evidence are: Differentiate RADIUS latency and repeated endpoint authentication churn from application packet loss or physical interface faults. Together with: Inspect authentication attempt rates, failure/reject categories, RADIUS timing, supplicant behavior and role download logs. Scenario: After a policy change, authenticated users repeatedly transition between roles and experience intermittent connectivity.

Compare negotiated link speed and error counters to rule out physical bottlenecks before altering QoS or routing. This step pertains to Duplex speed and physical error performance analysis but is not one of the two complementary decisions in this case. The required response and evidence are: Differentiate RADIUS latency and repeated endpoint authentication churn from application packet loss or physical interface faults. Together with: Inspect authentication attempt rates, failure/reject categories, RADIUS timing, supplicant behavior and role download logs. Scenario: After a policy change, authenticated users repeatedly transition between roles and experience intermittent connectivity.

Reviewers can trace a stated service requirement to deployed configuration and a reproducible acceptance test. This step pertains to Requirements-to-configuration traceability matrix but is not one of the two complementary decisions in this case. The required response and evidence are: Differentiate RADIUS latency and repeated endpoint authentication churn from application packet loss or physical interface faults. Together with: Inspect authentication attempt rates, failure/reject categories, RADIUS timing, supplicant behavior and role download logs. Scenario: After a policy change, authenticated users repeatedly transition between roles and experience intermittent connectivity.

Review model software release notes, platform feature matrix, hardware resource limits and transceiver compatibility. This step pertains to AOS-CX feature and software compatibility matrix but is not one of the two complementary decisions in this case. The required response and evidence are: Create a consistent VLAN ID, SVI subnet, gateway and routing-domain matrix avoiding overlaps and unintended spanning. Together with: Verify address reservations, VRF segmentation, DHCP scope consistency, inter-site connectivity and VLAN trunk maps. Scenario: Two branches use overlapping RFC1918 subnets but are scheduled for direct routed connectivity.

The congested class and marking mismatch are documented with correlated performance impact. This step pertains to QoS queue drop root cause under congestion but is not one of the two complementary decisions in this case. The required response and evidence are: Create a consistent VLAN ID, SVI subnet, gateway and routing-domain matrix avoiding overlaps and unintended spanning. Together with: Verify address reservations, VRF segmentation, DHCP scope consistency, inter-site connectivity and VLAN trunk maps. Scenario: Two branches use overlapping RFC1918 subnets but are scheduled for direct routed connectivity.

Prepare rack units, air flow, dual power paths, cable labeling and OOB management before powering the switching hardware. This step pertains to Physical installation and rack power implementation but is not one of the two complementary decisions in this case. The required response and evidence are: Create a consistent VLAN ID, SVI subnet, gateway and routing-domain matrix avoiding overlaps and unintended spanning. Together with: Verify address reservations, VRF segmentation, DHCP scope consistency, inter-site connectivity and VLAN trunk maps. Scenario: Two branches use overlapping RFC1918 subnets but are scheduled for direct routed connectivity.

Identify LAG members that fail to bundle due to system ID, LACP mode, peer-group, speed or VLAN incompatibility. This action instead applies to LACP aggregation mismatch investigation. A connected Ethernet cable does not establish a valid LACP member when peer and interface attributes differ. It does not directly resolve the controlling requirement. The targeted response is: Distinguish missing DHCP broadcasts, blocked offers and relay misconfiguration with trust and binding evidence. Scenario: A new access closet's endpoints repeatedly send DHCP Discover but no Offer reaches them.

Use separate VRFs for management, corporate, and guest routing where specified, with explicit approved inter-VRF connectivity. This action instead applies to VRF isolation and controlled route leaking. VRFs separate routing tables, but they do not replace security policy on deliberately interconnected services. It does not directly resolve the controlling requirement. The targeted response is: Distinguish missing DHCP broadcasts, blocked offers and relay misconfiguration with trust and binding evidence. Scenario: A new access closet's endpoints repeatedly send DHCP Discover but no Offer reaches them.

Separate ISL interruption, keepalive loss and downlink MC-LAG member faults in a VSX pair using peer-state evidence. This action instead applies to VSX peer and keepalive failure symptom isolation. Independent VSX peer control planes require distinct peer communications; ISL and keepalive carry different roles. It does not directly resolve the controlling requirement. The targeted response is: Distinguish missing DHCP broadcasts, blocked offers and relay misconfiguration with trust and binding evidence. Scenario: A new access closet's endpoints repeatedly send DHCP Discover but no Offer reaches them.

The intended distribution bridge becomes root and redundant loops are blocked while failover converges predictably. This step pertains to RSTP or MSTP bridge and port role control but is not one of the two complementary decisions in this case. The required response and evidence are: Monitor authentication success ratios, rejected sessions, policy role assignment and known exception endpoints by switch/site. Together with: Examine RADIUS response categories, endpoint identity, effective user role, switch port and historical attempts. Scenario: An engineer reports endpoint access healthy because link state is up while RADIUS reject counts climb.

Use scheduled and validated AOS-CX software maintenance with platform-specific images, checkpoints and supported fallback approach. This step pertains to Firmware maintenance compatibility and image fallback but is not one of the two complementary decisions in this case. The required response and evidence are: Monitor authentication success ratios, rejected sessions, policy role assignment and known exception endpoints by switch/site. Together with: Examine RADIUS response categories, endpoint identity, effective user role, switch port and historical attempts. Scenario: An engineer reports endpoint access healthy because link state is up while RADIUS reject counts climb.

Compare serials, firmware, management tenant, location, replacement spares, support expiration and asset owner. This step pertains to Inventory and licensing lifecycle control but is not one of the two complementary decisions in this case. The required response and evidence are: Monitor authentication success ratios, rejected sessions, policy role assignment and known exception endpoints by switch/site. Together with: Examine RADIUS response categories, endpoint identity, effective user role, switch port and historical attempts. Scenario: An engineer reports endpoint access healthy because link state is up while RADIUS reject counts climb.