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Record deliberate changes in running configuration, save the intended startup state and use checkpoints or diffs as an auditable rollback option. This action instead applies to AOS-CX configuration save and checkpoint workflow. A running change does not become a persistent boot baseline automatically without the appropriate save process. It does not directly resolve the controlling requirement. The targeted response is: Maintain accurate switch asset inventory, optics, warranty, software versions, support contract and management license state. Scenario: A regional network team cannot obtain timely replacement because the installed switch serial is absent from its asset register.

Correlate system logs, NTP timestamps and interface or protocol counters to reconstruct network incidents accurately. This action instead applies to AOS-CX log event and timestamp correlation. Logs from unaligned clocks can invert event order and create false conclusions about fault propagation. It does not directly resolve the controlling requirement. The targeted response is: Maintain accurate switch asset inventory, optics, warranty, software versions, support contract and management license state. Scenario: A regional network team cannot obtain timely replacement because the installed switch serial is absent from its asset register.

Build controlled REST configuration changes with preflight GET/diff, approved PUT/PATCH semantics, error handling and postwrite state checks. This action instead applies to Idempotent REST updates and config difference verification. Some REST PUT requests can reset omitted attributes to defaults; idempotence requires careful payload and state comparison. It does not directly resolve the controlling requirement. The targeted response is: Maintain accurate switch asset inventory, optics, warranty, software versions, support contract and management license state. Scenario: A regional network team cannot obtain timely replacement because the installed switch serial is absent from its asset register.

Inspect aggregate state, member operational rates, LACP partner/system IDs, VLAN tags and individual member counters. These checks can help with LACP link aggregation member consistency, but they are not the most discriminating first evidence here. Examine: Inspect marked packets, ingress trust, queue drops, egress scheduling and application performance. Scenario: A QoS change appears successful on an idle link but its actual impact was never tested under congestion.

Inspect ingress VRF, SVI assignment, per-VRF routes, next-hop resolution, leak policy and permitted firewall path. These checks can help with VRF route-table mismatch investigation, but they are not the most discriminating first evidence here. Examine: Inspect marked packets, ingress trust, queue drops, egress scheduling and application performance. Scenario: A QoS change appears successful on an idle link but its actual impact was never tested under congestion.

Inspect peak counters, buffers, burst duration, port rates, packet loss and affected application flows. These checks can help with Microburst and oversubscription performance analysis, but they are not the most discriminating first evidence here. Examine: Inspect marked packets, ingress trust, queue drops, egress scheduling and application performance. Scenario: A QoS change appears successful on an idle link but its actual impact was never tested under congestion.

Map every customer requirement to an implementation control, validation evidence, accountable owner and acceptable failure behavior. This action instead applies to Requirements-to-configuration traceability matrix. A checklist of completed CLI commands is not proof that the business service objectives were met. It does not directly resolve the controlling requirement. The targeted response is: Use supported AOS-CX API endpoints and role-scoped service accounts for automations, separating read-only audits from approved changes. Scenario: A REST PUT request omits existing settings and the team fails to review the full object mutation risk.

Create LAG groups with matching LACP negotiation, physical rates, VLAN configuration and supported hash behavior. This action instead applies to LACP link aggregation member consistency. LACP forms an aggregate only when the peer and member attributes are compatible; wiring two cables is not proof of bundling. It does not directly resolve the controlling requirement. The targeted response is: Use supported AOS-CX API endpoints and role-scoped service accounts for automations, separating read-only audits from approved changes. Scenario: A REST PUT request omits existing settings and the team fails to review the full object mutation risk.

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: Use supported AOS-CX API endpoints and role-scoped service accounts for automations, separating read-only audits from approved changes. Scenario: A REST PUT request omits existing settings and the team fails to review the full object mutation risk.

Build an operational view correlating site reachability, interface error state, routing stability and user impact for prioritized response. 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: Use supported Network Analytics Engine monitors and rules to correlate switch database state with alerts and historical graphs. Together with: Review NAE script/agent availability, monitored REST URI, alert condition, historical timeline, privileges and resource impact. Scenario: An NAE script is installed on a switch series that does not support the referenced metric and shows no history.

The installed equipment maintains acceptable temperature and power redundancy, with recoverable console access. 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: Use supported Network Analytics Engine monitors and rules to correlate switch database state with alerts and historical graphs. Together with: Review NAE script/agent availability, monitored REST URI, alert condition, historical timeline, privileges and resource impact. Scenario: An NAE script is installed on a switch series that does not support the referenced metric and shows no history.

Compare firmware, config diffs, CPU/memory, temperature, traffic rates and log markers for the relevant period. This step pertains to Operational state and baseline configuration differences but is not one of the two complementary decisions in this case. The required response and evidence are: Use supported Network Analytics Engine monitors and rules to correlate switch database state with alerts and historical graphs. Together with: Review NAE script/agent availability, monitored REST URI, alert condition, historical timeline, privileges and resource impact. Scenario: An NAE script is installed on a switch series that does not support the referenced metric and shows no history.

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: Check per-VRF interfaces and routes, policy-based leaks, next hop resolution and source/destination acceptance tests. Scenario: A guest SVI is placed in the management VRF because its VLAN number resembles the admin range.

Inspect authorized DHCP server ports, binding tables, protected VLANs, ARP counters and switch feature support. These checks can help with Port security and DHCP/ARP spoofing defenses, but they are not the most discriminating first evidence here. Examine: Check per-VRF interfaces and routes, policy-based leaks, next hop resolution and source/destination acceptance tests. Scenario: A guest SVI is placed in the management VRF because its VLAN number resembles the admin range.

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 per-VRF interfaces and routes, policy-based leaks, next hop resolution and source/destination acceptance tests. Scenario: A guest SVI is placed in the management VRF because its VLAN number resembles the admin range.

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 VRRP role/priority or VSX active gateway configuration, virtual MAC/IP, peer state and ARP entries. Scenario: Two distribution switches announce separate physical gateway addresses and clients lose access when one is removed.

Inspect TCP reachability, neighbor remote AS, update source, next hop, accepted/advertised prefixes and policy counters. These checks can help with BGP peer establishment and route policy validation, but they are not the most discriminating first evidence here. Examine: Inspect VRRP role/priority or VSX active gateway configuration, virtual MAC/IP, peer state and ARP entries. Scenario: Two distribution switches announce separate physical gateway addresses and clients lose access when one is removed.

Inspect active configuration context, interface name, running configuration, link state, peer capabilities and software help. These checks can help with AOS-CX interface configuration hierarchy, but they are not the most discriminating first evidence here. Examine: Inspect VRRP role/priority or VSX active gateway configuration, virtual MAC/IP, peer state and ARP entries. Scenario: Two distribution switches announce separate physical gateway addresses and clients lose access when one is removed.

Inspect authentication attempt rates, failure/reject categories, RADIUS timing, supplicant behavior and role download logs. These checks can help with Authentication storms and endpoint retry load, but they are not the most discriminating first evidence here. Examine: Compare firmware, config diffs, CPU/memory, temperature, traffic rates and log markers for the relevant period. Scenario: One switch reports high CPU after a logging agent update and the incident report ignores change timestamps.

Inspect switch firmware, GET /rest reported versions, authorization, resource URI and response shape. These checks can help with AOS-CX REST API version discovery and compatibility, but they are not the most discriminating first evidence here. Examine: Compare firmware, config diffs, CPU/memory, temperature, traffic rates and log markers for the relevant period. Scenario: One switch reports high CPU after a logging agent update and the incident report ignores change timestamps.

Inspect checkpoint inventory, startup/running diff, saved exports, backup location, device-specific recovery instructions and access permissions. These checks can help with Configuration checkpoint and rollback retention, but they are not the most discriminating first evidence here. Examine: Compare firmware, config diffs, CPU/memory, temperature, traffic rates and log markers for the relevant period. Scenario: One switch reports high CPU after a logging agent update and the incident report ignores change timestamps.

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: Use authorized telemetry access, polling cadence and data retention to collect switch statistics without overwhelming platforms. Scenario: A collector discards interface identifiers after a stack member change and falsely reports port disappearance.

Establish prechange checkpoints, defined retention and restore testing for AOS-CX configuration changes across managed devices. This action instead applies to Configuration checkpoint and rollback retention. A config backup is useful only when its location, currency and restore procedure can be demonstrated. It does not directly resolve the controlling requirement. The targeted response is: Use authorized telemetry access, polling cadence and data retention to collect switch statistics without overwhelming platforms. Scenario: A collector discards interface identifiers after a stack member change and falsely reports port disappearance.

Locate excess multicast replication or lost group membership using IGMP/PIM state and per-port traffic evidence. This action instead applies to Multicast flooding and receiver path performance. Multicast forwarding depends on group state and querier or PIM control, not merely the VLAN number. It does not directly resolve the controlling requirement. The targeted response is: Use authorized telemetry access, polling cadence and data retention to collect switch statistics without overwhelming platforms. Scenario: A collector discards interface identifiers after a stack member change and falsely reports port disappearance.

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: Check root bridge ID, port role/state, BPDU activity, topology change count and MAC instability. Scenario: After adding a new switch, campus broadcasts rise and MAC addresses move rapidly between two uplinks.

Review change timeline, configuration diff, backups, affected flows, rollback commands and success criteria. These checks can help with Minimal-change rollback and restoration plan, but they are not the most discriminating first evidence here. Examine: Check root bridge ID, port role/state, BPDU activity, topology change count and MAC instability. Scenario: After adding a new switch, campus broadcasts rise and MAC addresses move rapidly between two uplinks.

Review archive permissions, encryption state, retention policy, sensitive fields, backup audit trail and restore rights. These checks can help with Safe configuration archiving and secret handling, but they are not the most discriminating first evidence here. Examine: Check root bridge ID, port role/state, BPDU activity, topology change count and MAC instability. Scenario: After adding a new switch, campus broadcasts rise and MAC addresses move rapidly between two uplinks.

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: Inspect checkpoint inventory, startup/running diff, saved exports, backup location, device-specific recovery instructions and access permissions. Scenario: A branch recovery drill discovers configuration archives are stored on the same failed switch being replaced.

Review NAE script/agent availability, monitored REST URI, alert condition, historical timeline, privileges and resource impact. These checks can help with NAE agent and threshold monitoring, but they are not the most discriminating first evidence here. Examine: Inspect checkpoint inventory, startup/running diff, saved exports, backup location, device-specific recovery instructions and access permissions. Scenario: A branch recovery drill discovers configuration archives are stored on the same failed switch being replaced.

Check change owner, impact window, outage dependencies, test plan, rollback threshold and service notification record. These checks can help with Scheduled change window and impact communication, but they are not the most discriminating first evidence here. Examine: Inspect checkpoint inventory, startup/running diff, saved exports, backup location, device-specific recovery instructions and access permissions. Scenario: A branch recovery drill discovers configuration archives are stored on the same failed switch being replaced.

Inspect reverse-path forwarding, PIM neighbors, rendezvous-point design if applicable, multicast route state and IGMP memberships. This step pertains to PIM and multicast routed-path validation but is not one of the two complementary decisions in this case. The required response and evidence are: Validate route selection, administrative distance or policy and equal-cost path behavior across backup uplinks. Together with: Compare installed routing table, OSPF or BGP candidate paths, forwarding next hops and configured preferences. Scenario: An edge switch learns the same destination from two sources and prefers a high-latency backup unexpectedly.

Provide a supported resilient default gateway design and test active-forwarding behavior under peer failure. This step pertains to VRRP or active gateway redundant gateway behavior but is not one of the two complementary decisions in this case. The required response and evidence are: Validate route selection, administrative distance or policy and equal-cost path behavior across backup uplinks. Together with: Compare installed routing table, OSPF or BGP candidate paths, forwarding next hops and configured preferences. Scenario: An edge switch learns the same destination from two sources and prefers a high-latency backup unexpectedly.

The specific VSX fault domain is identified with safe recovery steps, not a blind dual-reboot. This step pertains to VSX peer and keepalive failure symptom isolation but is not one of the two complementary decisions in this case. The required response and evidence are: Validate route selection, administrative distance or policy and equal-cost path behavior across backup uplinks. Together with: Compare installed routing table, OSPF or BGP candidate paths, forwarding next hops and configured preferences. Scenario: An edge switch learns the same destination from two sources and prefers a high-latency backup unexpectedly.