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Compare installed routing table, OSPF or BGP candidate paths, forwarding next hops and configured preferences. This step pertains to OSPF and BGP route preference and ECMP planning but is not one of the two complementary decisions in this case. The required response and evidence are: Install supported SFP or QSFP transceivers with matching fiber and validate interface hardware status before making logical protocol changes. Together with: Inspect transceiver identification, Tx/Rx optical levels, fiber connectors, temperature, cable length and port capability. Scenario: An aggregation link repeatedly flaps when one incompatible transceiver is inserted during a campus upgrade.

Validate port maps, patching, labeling and redundant path diversity as part of physical switch commissioning. This step pertains to Front-panel and cabling as-built verification but is not one of the two complementary decisions in this case. The required response and evidence are: Install supported SFP or QSFP transceivers with matching fiber and validate interface hardware status before making logical protocol changes. Together with: Inspect transceiver identification, Tx/Rx optical levels, fiber connectors, temperature, cable length and port capability. Scenario: An aggregation link repeatedly flaps when one incompatible transceiver is inserted during a campus upgrade.

The end-to-end link establishes at the intended speed with acceptable power levels and no unsupported optics alarms. This step pertains to Optical and copper media compatibility but is not one of the two complementary decisions in this case. The required response and evidence are: Install supported SFP or QSFP transceivers with matching fiber and validate interface hardware status before making logical protocol changes. Together with: Inspect transceiver identification, Tx/Rx optical levels, fiber connectors, temperature, cable length and port capability. Scenario: An aggregation link repeatedly flaps when one incompatible transceiver is inserted during a campus upgrade.

Inspect replacement model compatibility, firmware, backup checksum, device identity, port map and management integration. These checks can help with Backup restoration and replacement switch workflow, but they are not the most discriminating first evidence here. Examine: Compare serials, firmware, management tenant, location, replacement spares, support expiration and asset owner. Scenario: A management subscription lapses on production switches while onsite staff assume monitoring will continue indefinitely.

Inspect counter rates, monitoring interval, interface speed, burst peaks, growth trend and service-level effects. These checks can help with Interface utilization and capacity trend interpretation, but they are not the most discriminating first evidence here. Examine: Compare serials, firmware, management tenant, location, replacement spares, support expiration and asset owner. Scenario: A management subscription lapses on production switches while onsite staff assume monitoring will continue indefinitely.

Check root bridge ID, port role/state, BPDU activity, topology change count and MAC instability. These checks can help with STP blocking and topology-loop recognition, but they are not the most discriminating first evidence here. Examine: Compare serials, firmware, management tenant, location, replacement spares, support expiration and asset owner. Scenario: A management subscription lapses on production switches while onsite staff assume monitoring will continue indefinitely.

Inspect RADIUS server reachability/secret, authentication session state, EAP exchange, assigned role and rejection logs. These checks can help with 802.1X and RADIUS port authentication, but they are not the most discriminating first evidence here. Examine: Check endpoint identity, allowed MAC profiles, primary 802.1X attempts, fallback order, authentication timeout and role policy. Scenario: A building sensor cannot run EAP but operations wants it on a full-trust user VLAN through unreviewed MAB.

Check link distance, OM grade or single-mode fiber, optical budget, part support and switch interface rate. These checks can help with Optical and copper media compatibility, but they are not the most discriminating first evidence here. Examine: Check endpoint identity, allowed MAC profiles, primary 802.1X attempts, fallback order, authentication timeout and role policy. Scenario: A building sensor cannot run EAP but operations wants it on a full-trust user VLAN through unreviewed MAB.

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: Check endpoint identity, allowed MAC profiles, primary 802.1X attempts, fallback order, authentication timeout and role policy. Scenario: A building sensor cannot run EAP but operations wants it on a full-trust user VLAN through unreviewed MAB.

Check enabled management services by VRF, ACLs, user roles, TLS/SSH settings, logging, NTP and out-of-band recovery. These checks can help with AOS-CX secure management access setup, but they are not the most discriminating first evidence here. Examine: Inspect ingress markings, trust mode, class map, queue mapping, device capabilities and egress counters. Scenario: A workstation app marks all bulk backups as priority traffic and starves legitimate voice without a boundary policy.

Compare live LLDP neighbors, optical transceiver inventory, cable identifiers, rack diagrams and authorized topology. These checks can help with Front-panel and cabling as-built verification, but they are not the most discriminating first evidence here. Examine: Inspect ingress markings, trust mode, class map, queue mapping, device capabilities and egress counters. Scenario: A workstation app marks all bulk backups as priority traffic and starves legitimate voice without a boundary policy.

Review API role, HTTPS service VRF, TLS validation, token storage, resource responses and request logs. These checks can help with Read-only REST audit and secure token handling, but they are not the most discriminating first evidence here. Examine: Inspect ingress markings, trust mode, class map, queue mapping, device capabilities and egress counters. Scenario: A workstation app marks all bulk backups as priority traffic and starves legitimate voice without a boundary policy.

An automation job reads supported configuration and state consistently across targeted platforms with version-aware error handling. This result is associated with AOS-CX REST API version discovery and compatibility; it does not demonstrate the requested network behavior. The relevant acceptance test is: New templates apply correctly to pilot devices and promote only after peer, VLAN and role acceptance gates pass. Scenario: A Central template contains a hardcoded VLAN uplink list and is pushed to every campus model unchanged.

Subscribers receive expected streams without flooding non-subscribing access ports or triggering avoidable congestion. This result is associated with Multicast flooding and receiver path performance; it does not demonstrate the requested network behavior. The relevant acceptance test is: New templates apply correctly to pilot devices and promote only after peer, VLAN and role acceptance gates pass. Scenario: A Central template contains a hardcoded VLAN uplink list and is pushed to every campus model unchanged.

The updated switch boots a supported image and retains routing, authentication and management services with tested rollback readiness. This result is associated with Firmware maintenance compatibility and image fallback; it does not demonstrate the requested network behavior. The relevant acceptance test is: New templates apply correctly to pilot devices and promote only after peer, VLAN and role acceptance gates pass. Scenario: A Central template contains a hardcoded VLAN uplink list and is pushed to every campus model unchanged.

An incident is routed to the accountable owner with reproducible fault evidence instead of disconnected alarms. This step pertains to Troubleshooting evidence dashboard and incident triage but is not one of the two complementary decisions in this case. The required response and evidence are: Integrate the network with approved Central monitoring and incident workflows using supported device enrollment, health data and role-scoped access. Together with: Inspect Central topology, device status, telemetry collection, event timestamps, access roles and alert forwarding. Scenario: A new branch is present in inventory but traffic and device-health charts remain empty.

Check actual watt draw, negotiated 802.3af/at/bt class, switch budget, PSU status and power priorities. This step pertains to Power and PoE field commissioning but is not one of the two complementary decisions in this case. The required response and evidence are: Integrate the network with approved Central monitoring and incident workflows using supported device enrollment, health data and role-scoped access. Together with: Inspect Central topology, device status, telemetry collection, event timestamps, access roles and alert forwarding. Scenario: A new branch is present in inventory but traffic and device-health charts remain empty.

Apply supported downloadable user roles or dynamic segmentation so authenticated client classes receive consistent least-privilege network access. 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: Integrate the network with approved Central monitoring and incident workflows using supported device enrollment, health data and role-scoped access. Together with: Inspect Central topology, device status, telemetry collection, event timestamps, access roles and alert forwarding. Scenario: A new branch is present in inventory but traffic and device-health charts remain empty.

Priority endpoints receive stable power without oversubscription during peak endpoint startup. This result is associated with Power and PoE field commissioning; it does not demonstrate the requested network behavior. The relevant acceptance test is: All live uplinks match recorded peer and fiber paths without creating an unplanned single point of failure. Scenario: A core's keepalive cable is connected to an interface intended for the production ISL and the wiring error goes unnoticed.

The physical link comes up reliably at intended speed with optical levels in supported range and no recurring errors. This result is associated with Optic insertion and physical layer preflight; it does not demonstrate the requested network behavior. The relevant acceptance test is: All live uplinks match recorded peer and fiber paths without creating an unplanned single point of failure. Scenario: A core's keepalive cable is connected to an interface intended for the production ISL and the wiring error goes unnoticed.

Maintenance produces attributable acceptance evidence and business users receive accurate impact updates. This result is associated with Scheduled change window and impact communication; it does not demonstrate the requested network behavior. The relevant acceptance test is: All live uplinks match recorded peer and fiber paths without creating an unplanned single point of failure. Scenario: A core's keepalive cable is connected to an interface intended for the production ISL and the wiring error goes unnoticed.

Recover a failed AOS-CX switch with supported image, saved configuration, verified physical inventory and secure credential restoration. This action instead applies to Backup restoration and replacement switch workflow. Restoring a file to different hardware may require port and image adaptations; backup bytes alone do not prove service recovery. It does not directly resolve the controlling requirement. The targeted response is: Reconcile the approved design with actual interfaces, optics, firmware, cable labels and final switch configurations after deployment. Scenario: A field team swaps transceivers due to a fiber limitation but leaves the design's part numbers unchanged.

Turn a wired network design into sequenced change steps with prerequisites, measurable acceptance tests, decision gates and rollback. This action instead applies to Implementation plan preflight and rollback criteria. A network drawing is not an implementation plan without timing, safe transitions and testable rollback. It does not directly resolve the controlling requirement. The targeted response is: Reconcile the approved design with actual interfaces, optics, firmware, cable labels and final switch configurations after deployment. Scenario: A field team swaps transceivers due to a fiber limitation but leaves the design's part numbers unchanged.

Calculate access ports, PoE classes and spare uplink capacity from endpoint inventory and growth rather than ordering by current occupied ports alone. This action instead applies to Port density and growth headroom. Port availability, available watts and uplink throughput are separate constraints in campus switch sizing. It does not directly resolve the controlling requirement. The targeted response is: Reconcile the approved design with actual interfaces, optics, firmware, cable labels and final switch configurations after deployment. Scenario: A field team swaps transceivers due to a fiber limitation but leaves the design's part numbers unchanged.

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: Repair LACP member identity or negotiation mismatches on both peers rather than converting a redundant uplink into unmonitored standalone links. Scenario: One of two 10G uplink members refuses to aggregate after its peer port was moved to another LAG.

Use least-privilege authenticated REST GET requests to audit switch state and avoid embedding credentials in scripts or logs. This action instead applies to Read-only REST audit and secure token handling. Read-only audits do not need broad write permission and successful connection does not imply every requested resource exists. 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: One of two 10G uplink members refuses to aggregate after its peer port was moved to another LAG.

Distinguish loss of light or cabling/optic errors from configuration faults using interface and transceiver diagnostics before changing routing policy. This action instead applies to Physical link failure diagnostics. A Layer 1 fault should be isolated with optical and electrical evidence before troubleshooting Layer 3 protocols. 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: One of two 10G uplink members refuses to aggregate after its peer port was moved to another LAG.

Inspect LACP neighbor identity, actor/partner keys, aggregated member state, group configuration and per-member counters. These checks can help with LACP aggregation mismatch investigation, but they are not the most discriminating first evidence here. Examine: Inspect Central topology, device status, telemetry collection, event timestamps, access roles and alert forwarding. Scenario: A core switch repeatedly changes uplink status but operations has not configured alert delivery to the correct on-call group.

Inspect ISL status, VSX keepalive, MC-LAG members, VLAN consistency, active gateway and split-brain protections. These checks can help with VSX and aggregation integration verification, but they are not the most discriminating first evidence here. Examine: Inspect Central topology, device status, telemetry collection, event timestamps, access roles and alert forwarding. Scenario: A core switch repeatedly changes uplink status but operations has not configured alert delivery to the correct on-call group.

Check active REST API version, authentication mode, target VRF, transaction response, desired diff and audit trail. These checks can help with REST API and configuration-tool integration boundaries, but they are not the most discriminating first evidence here. Examine: Inspect Central topology, device status, telemetry collection, event timestamps, access roles and alert forwarding. Scenario: A core switch repeatedly changes uplink status but operations has not configured alert delivery to the correct on-call group.

Use IGMP snooping and a suitable querier or routed multicast context to constrain multicast replication to interested ports. This action instead applies to IGMP snooping L2 multicast receiver control. IGMP snooping relies on correct membership signaling and appropriate querier behavior; static VLAN existence is insufficient. It does not directly resolve the controlling requirement. The targeted response is: Compare negotiated link speed and error counters to rule out physical bottlenecks before altering QoS or routing. Scenario: A 10G uplink falls back to 1G after a switch replacement and business apps slow under normal load.

Correct QoS trust, classification and queue mapping on the affected path, then compare loss and latency under representative load. This action instead applies to QoS classification repair with before/after measures. End-to-end QoS success requires traffic markings and queue treatment; increasing link speed may mask misclassification temporarily. It does not directly resolve the controlling requirement. The targeted response is: Compare negotiated link speed and error counters to rule out physical bottlenecks before altering QoS or routing. Scenario: A 10G uplink falls back to 1G after a switch replacement and business apps slow under normal load.

Restore only the approved missing VLAN tags and native VLAN relationship at both ends of an uplink, then test representative hosts. This action instead applies to Correct trunk VLAN remediation. Broadly allowing every VLAN may restore one workload but violate segmentation requirements. It does not directly resolve the controlling requirement. The targeted response is: Compare negotiated link speed and error counters to rule out physical bottlenecks before altering QoS or routing. Scenario: A 10G uplink falls back to 1G after a switch replacement and business apps slow under normal load.