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The intended aggregate forms and remains stable under a member unplug test. This step pertains to LACP peer repair without unsafe bypass but is not one of the two complementary decisions in this case. The required response and evidence are: Archive switch configs with encryption, retention and least-privilege access while avoiding uncontrolled exposure of shared credentials or tokens. Together with: Review archive permissions, encryption state, retention policy, sensitive fields, backup audit trail and restore rights. Scenario: A help desk posts complete switch configurations with local shared secrets in an unrestricted ticket.

Maintain accurate switch asset inventory, optics, warranty, software versions, support contract and management license state. 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: Archive switch configs with encryption, retention and least-privilege access while avoiding uncontrolled exposure of shared credentials or tokens. Together with: Review archive permissions, encryption state, retention policy, sensitive fields, backup audit trail and restore rights. Scenario: A help desk posts complete switch configurations with local shared secrets in an unrestricted ticket.

Check template parameter coverage, model firmware, intended diffs, test switch result, scope and staged deployment audit. This step pertains to Config template test and promotion pipeline but is not one of the two complementary decisions in this case. The required response and evidence are: Archive switch configs with encryption, retention and least-privilege access while avoiding uncontrolled exposure of shared credentials or tokens. Together with: Review archive permissions, encryption state, retention policy, sensitive fields, backup audit trail and restore rights. Scenario: A help desk posts complete switch configurations with local shared secrets in an unrestricted ticket.

Inspect boot logs, DHCP options, name resolution, management addressing, port VLAN, service accessibility and registration state. These checks can help with ZTP bootstrapping and management plane reachability, but they are not the most discriminating first evidence here. Examine: 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.

Inspect FIB next-hop choices, LAG hashing, flow tuples, interface member counters and return-path routes. These checks can help with Asymmetric path and ECMP hash performance analysis, but they are not the most discriminating first evidence here. Examine: 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.

Inspect polling interval, baseline trend, telemetry collection gaps, alert configuration and correlated switch counters. These checks can help with Telemetry false-positive and baseline drift analysis, but they are not the most discriminating first evidence here. Examine: 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.

An automation job reads supported configuration and state consistently across targeted platforms with version-aware error handling. This step pertains to AOS-CX REST API version discovery and compatibility but is not one of the two complementary decisions in this case. The required response and evidence are: Implement a supported VSF topology with consistent member identities, stack links and role expectations, and validate member failover. Together with: Inspect stack topology, member state, link health, firmware compatibility, commander role and split detection. Scenario: After replacing a failed stack unit, the team does not verify that uplink and port configuration maps followed the correct member IDs.

Assign untagged client access ports and explicitly required tagged VLANs to uplinks using supported AOS-CX VLAN interface modes. This step pertains to Access VLAN and trunk allowed-list design but is not one of the two complementary decisions in this case. The required response and evidence are: Implement a supported VSF topology with consistent member identities, stack links and role expectations, and validate member failover. Together with: Inspect stack topology, member state, link health, firmware compatibility, commander role and split detection. Scenario: After replacing a failed stack unit, the team does not verify that uplink and port configuration maps followed the correct member IDs.

Inspect root bridge ID, port roles, path cost, MST region consistency and topology change counters. 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: Implement a supported VSF topology with consistent member identities, stack links and role expectations, and validate member failover. Together with: Inspect stack topology, member state, link health, firmware compatibility, commander role and split detection. Scenario: After replacing a failed stack unit, the team does not verify that uplink and port configuration maps followed the correct member IDs.

Inspect VLAN inventory, per-interface native versus tagged behavior, allowed VLANs and peer trunk configuration. These checks can help with Access VLAN and trunk allowed-list design, but they are not the most discriminating first evidence here. Examine: Check VLAN active members, SVI IP prefix, routing state, VRF membership, connected routes and ARP/ND entries. Scenario: Two distribution switches receive conflicting SVI gateway IP addresses without a supported HA protocol.

Inspect port role, connected device, received BPDU counters, configured guard behavior and recovery policy. These checks can help with BPDU guard and edge port hardening, but they are not the most discriminating first evidence here. Examine: Check VLAN active members, SVI IP prefix, routing state, VRF membership, connected routes and ARP/ND entries. Scenario: Two distribution switches receive conflicting SVI gateway IP addresses without a supported HA protocol.

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: Check VLAN active members, SVI IP prefix, routing state, VRF membership, connected routes and ARP/ND entries. Scenario: Two distribution switches receive conflicting SVI gateway IP addresses without a supported HA protocol.

Distinguish loss of light or cabling/optic errors from configuration faults using interface and transceiver diagnostics before changing routing policy. 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: Separate ISL interruption, keepalive loss and downlink MC-LAG member faults in a VSX pair using peer-state evidence. Together with: Inspect VSX peer role, keepalive state, ISL counters, MAC or VLAN synchronization and downstream LAG state. Scenario: An aggregation pair reports keepalive lost but the ISL is still operational, prompting a split-risk investigation.

Different user and IoT classes are assigned authorized traffic policies regardless of which compliant access port they use. This step pertains to Dynamic segmentation downloadable roles policy but is not one of the two complementary decisions in this case. The required response and evidence are: Separate ISL interruption, keepalive loss and downlink MC-LAG member faults in a VSX pair using peer-state evidence. Together with: Inspect VSX peer role, keepalive state, ISL counters, MAC or VLAN synchronization and downstream LAG state. Scenario: An aggregation pair reports keepalive lost but the ISL is still operational, prompting a split-risk investigation.

Inspect queue backlog, buffer thresholds, drop reasons, burst traffic composition and port egress rates. This step pertains to Packet buffer pressure and head-of-line impact but is not one of the two complementary decisions in this case. The required response and evidence are: Separate ISL interruption, keepalive loss and downlink MC-LAG member faults in a VSX pair using peer-state evidence. Together with: Inspect VSX peer role, keepalive state, ISL counters, MAC or VLAN synchronization and downstream LAG state. Scenario: An aggregation pair reports keepalive lost but the ISL is still operational, prompting a split-risk investigation.

Restrict SSH, HTTPS and management VRF exposure and apply individual authenticated administrator roles before enabling remote management. This action instead applies to AOS-CX secure management access setup. Secure management requires both service availability and scoped authorization; turning on HTTPS on every VRF is not a required convenience. It does not directly resolve the controlling requirement. The targeted response is: Record deliberate changes in running configuration, save the intended startup state and use checkpoints or diffs as an auditable rollback option. Scenario: A switch shows different startup and running state yet the maintenance report incorrectly claims configuration has been finalized.

Validate PoE power supply capacity, cable pairs and endpoint class before activating powered devices or redundant PSU policies. This action instead applies to Power and PoE field commissioning. Available Ethernet ports do not imply sufficient PoE watt capacity, and redundant power modules must be matched to the intended load. It does not directly resolve the controlling requirement. The targeted response is: Record deliberate changes in running configuration, save the intended startup state and use checkpoints or diffs as an auditable rollback option. Scenario: A switch shows different startup and running state yet the maintenance report incorrectly claims configuration has been finalized.

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: Record deliberate changes in running configuration, save the intended startup state and use checkpoints or diffs as an auditable rollback option. Scenario: A switch shows different startup and running state yet the maintenance report incorrectly claims configuration has been finalized.

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: Use sensor, PSU, fan and PoE state to identify hardware conditions that threaten switching service continuity. Scenario: A campus closet overheats after ventilation changes and several switch ports begin flapping.

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: Use sensor, PSU, fan and PoE state to identify hardware conditions that threaten switching service continuity. Scenario: A campus closet overheats after ventilation changes and several switch ports begin flapping.

Maintain accurate switch asset inventory, optics, warranty, software versions, support contract and management license state. This action instead applies to Inventory and licensing lifecycle control. Inventory quality affects support and maintenance; a running switch is not proof its services or support are entitled. It does not directly resolve the controlling requirement. The targeted response is: Use sensor, PSU, fan and PoE state to identify hardware conditions that threaten switching service continuity. Scenario: A campus closet overheats after ventilation changes and several switch ports begin flapping.

Inspect boot logs, DHCP options, name resolution, management addressing, port VLAN, service accessibility and registration state. This step pertains to ZTP bootstrapping and management plane reachability but is not one of the two complementary decisions in this case. The required response and evidence are: Provide a supported resilient default gateway design and test active-forwarding behavior under peer failure. Together with: Inspect VRRP role/priority or VSX active gateway configuration, virtual MAC/IP, peer state and ARP entries. Scenario: A VSX pair is physically redundant yet one VLAN lacks the expected active gateway and fails during maintenance.

An automation job reads supported configuration and state consistently across targeted platforms with version-aware error handling. This step pertains to AOS-CX REST API version discovery and compatibility but is not one of the two complementary decisions in this case. The required response and evidence are: Provide a supported resilient default gateway design and test active-forwarding behavior under peer failure. Together with: Inspect VRRP role/priority or VSX active gateway configuration, virtual MAC/IP, peer state and ARP entries. Scenario: A VSX pair is physically redundant yet one VLAN lacks the expected active gateway and fails during maintenance.

Configure VLAN SVIs or routed physical interfaces within the correct VRF and validate address, administrative status and neighbor reachability. This step pertains to SVI and routed interface gateway configuration but is not one of the two complementary decisions in this case. The required response and evidence are: Provide a supported resilient default gateway design and test active-forwarding behavior under peer failure. Together with: Inspect VRRP role/priority or VSX active gateway configuration, virtual MAC/IP, peer state and ARP entries. Scenario: A VSX pair is physically redundant yet one VLAN lacks the expected active gateway and fails during maintenance.

The retry source and server bottleneck are isolated with sessions stabilizing and intended access policy retained. This step pertains to Authentication storms and endpoint retry load but is not one of the two complementary decisions in this case. The required response and evidence are: Configure queue weights or strict priority carefully so latency-sensitive applications receive service without starving other traffic. Together with: Inspect per-queue rates, drops, buffer pressure, link saturation and application latency under load. Scenario: A saturated WAN uplink drops voice packets despite active QoS policy because classification is incorrect.

Inspect port role, connected device, received BPDU counters, configured guard behavior and recovery policy. This step pertains to BPDU guard and edge port hardening but is not one of the two complementary decisions in this case. The required response and evidence are: Configure queue weights or strict priority carefully so latency-sensitive applications receive service without starving other traffic. Together with: Inspect per-queue rates, drops, buffer pressure, link saturation and application latency under load. Scenario: A saturated WAN uplink drops voice packets despite active QoS policy because classification is incorrect.

Configure BGP neighbor identity, AS relationships, reachability and import/export controls, then validate actual installed routes. This step pertains to BGP peer establishment and route policy validation but is not one of the two complementary decisions in this case. The required response and evidence are: Configure queue weights or strict priority carefully so latency-sensitive applications receive service without starving other traffic. Together with: Inspect per-queue rates, drops, buffer pressure, link saturation and application latency under load. Scenario: A saturated WAN uplink drops voice packets despite active QoS policy because classification is incorrect.

During congestion, supported critical traffic stays within service targets while lower-priority traffic is controlled predictably. This step pertains to Egress queue scheduling and congestion protection but is not one of the two complementary decisions in this case. The required response and evidence are: Compare negotiated link speed and error counters to rule out physical bottlenecks before altering QoS or routing. Together with: Inspect PHY speed, autonegotiation, FCS/CRC, runts, cable test and optic telemetry. Scenario: A 10G uplink falls back to 1G after a switch replacement and business apps slow under normal load.

Review OSPF neighbor state, area, timers, MTU, authentication, interface network type and installed routes. This step pertains to OSPF neighbor and route missing root cause but is not one of the two complementary decisions in this case. The required response and evidence are: Compare negotiated link speed and error counters to rule out physical bottlenecks before altering QoS or routing. Together with: Inspect PHY speed, autonegotiation, FCS/CRC, runts, cable test and optic telemetry. Scenario: A 10G uplink falls back to 1G after a switch replacement and business apps slow under normal load.

Restore an OSPF adjacency or missing advertisement using targeted parameter, area or redistribution corrections with route verification. This step pertains to OSPF route recovery with controlled scope but is not one of the two complementary decisions in this case. The required response and evidence are: Compare negotiated link speed and error counters to rule out physical bottlenecks before altering QoS or routing. Together with: Inspect PHY speed, autonegotiation, FCS/CRC, runts, cable test and optic telemetry. Scenario: A 10G uplink falls back to 1G after a switch replacement and business apps slow under normal load.

Inspect license tiers, serial entitlement, firmware support, account ownership and permitted network access. These checks can help with Campus management and licensing boundaries, but they are not the most discriminating first evidence here. Examine: Examine OSPF or BGP peer parameters, VRFs, route policies, prefix tables and expected reconvergence time. Scenario: The distribution block redistributes routes without filtering and introduces unexpected backup paths.

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: Examine OSPF or BGP peer parameters, VRFs, route policies, prefix tables and expected reconvergence time. Scenario: The distribution block redistributes routes without filtering and introduces unexpected backup paths.

Inspect VSX role and peer state, keepalive reachability, ISL counters, member sync status and downstream LAG health. These checks can help with VSX health telemetry and failover readiness, but they are not the most discriminating first evidence here. Examine: Examine OSPF or BGP peer parameters, VRFs, route policies, prefix tables and expected reconvergence time. Scenario: The distribution block redistributes routes without filtering and introduces unexpected backup paths.