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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: Review traffic direction, rate limits, burst settings, platform QoS resources and class-of-service monitoring. Scenario: A backup transfer experiences bursts and the engineer raises interface speed instead of investigating configured policer drops.

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: Review traffic direction, rate limits, burst settings, platform QoS resources and class-of-service monitoring. Scenario: A backup transfer experiences bursts and the engineer raises interface speed instead of investigating configured policer drops.

Check group membership entries, IGMP reports, snooping state, querier address and stream receiver path. These checks can help with IGMP snooping L2 multicast receiver control, but they are not the most discriminating first evidence here. Examine: Review traffic direction, rate limits, burst settings, platform QoS resources and class-of-service monitoring. Scenario: A backup transfer experiences bursts and the engineer raises interface speed instead of investigating configured policer drops.

The deployed switch supports expected expansion without immediate port exhaustion, power shedding or oversubscribed uplinks. This result is associated with Port density and growth headroom; it does not demonstrate the requested network behavior. The relevant acceptance test is: The chosen switch provides the required physical connectivity and resilient uplinks at documented load and without an unsupported feature assumption. Scenario: A branch closet needs 48 powered telephones and two high-capacity fiber uplinks but the proposed compact switch has an inadequate PoE budget.

Authorized endpoints receive expected segmentation after cutover while unauthorized ones remain isolated and administrators retain recovery access. This result is associated with Security and authentication migration coordination; it does not demonstrate the requested network behavior. The relevant acceptance test is: The chosen switch provides the required physical connectivity and resilient uplinks at documented load and without an unsupported feature assumption. Scenario: A branch closet needs 48 powered telephones and two high-capacity fiber uplinks but the proposed compact switch has an inadequate PoE budget.

Operators detect abnormal environment or power faults early and verify that redundant components protect the intended load. This result is associated with Environmental and power health monitoring; it does not demonstrate the requested network behavior. The relevant acceptance test is: The chosen switch provides the required physical connectivity and resilient uplinks at documented load and without an unsupported feature assumption. Scenario: A branch closet needs 48 powered telephones and two high-capacity fiber uplinks but the proposed compact switch has an inadequate PoE budget.

Operators detect abnormal environment or power faults early and verify that redundant components protect the intended load. This step pertains to Environmental and power health monitoring but is not one of the two complementary decisions in this case. The required response and evidence are: Size distributed or collapsed core switching based on site scale, resilient paths, routed boundaries and maintenance windows. Together with: Examine site topology, switch count, uplink capacity, failure domains and convergence requirements. Scenario: A small office proposes three hierarchical switch layers although its connectivity fits a compact collapsed core.

Review maintenance approval, baselines, device access, console recovery, config backups, support contacts and rollback triggers. This step pertains to Implementation plan preflight and rollback criteria but is not one of the two complementary decisions in this case. The required response and evidence are: Size distributed or collapsed core switching based on site scale, resilient paths, routed boundaries and maintenance windows. Together with: Examine site topology, switch count, uplink capacity, failure domains and convergence requirements. Scenario: A small office proposes three hierarchical switch layers although its connectivity fits a compact collapsed core.

Confirm required AOS-CX capabilities against exact switch series and firmware before committing to routing, overlays or security services. 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: Size distributed or collapsed core switching based on site scale, resilient paths, routed boundaries and maintenance windows. Together with: Examine site topology, switch count, uplink capacity, failure domains and convergence requirements. Scenario: A small office proposes three hierarchical switch layers although its connectivity fits a compact collapsed core.

Inspect interface admin/oper state, optic transmit/receive power, CRC/FCS counters, negotiated speed and neighbor light levels. These checks can help with Physical link failure diagnostics, but they are not the most discriminating first evidence here. Examine: Inspect PHY speed, autonegotiation, FCS/CRC, runts, cable test and optic telemetry. Scenario: A copper access port shows CRC errors when a damaged cable bends near the patch panel.

Review model software release notes, platform feature matrix, hardware resource limits and transceiver compatibility. These checks can help with AOS-CX feature and software compatibility matrix, but they are not the most discriminating first evidence here. Examine: Inspect PHY speed, autonegotiation, FCS/CRC, runts, cable test and optic telemetry. Scenario: A copper access port shows CRC errors when a damaged cable bends near the patch panel.

Review OSPF neighbor state, area, timers, MTU, authentication, interface network type and installed routes. These checks can help with OSPF neighbor and route missing root cause, but they are not the most discriminating first evidence here. Examine: Inspect PHY speed, autonegotiation, FCS/CRC, runts, cable test and optic telemetry. Scenario: A copper access port shows CRC errors when a damaged cable bends near the patch panel.

Review traffic direction, rate limits, burst settings, platform QoS resources and class-of-service monitoring. These checks can help with Ingress policing versus egress shaping design, 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 traffic-class policy references a DSCP value not mapped to the intended AOS-CX output queue.

Inspect per-queue rates, drops, buffer pressure, link saturation and application latency under load. These checks can help with Egress queue scheduling and congestion protection, 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 traffic-class policy references a DSCP value not mapped to the intended AOS-CX output queue.

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 ingress markings, trust mode, class map, queue mapping, device capabilities and egress counters. Scenario: A traffic-class policy references a DSCP value not mapped to the intended AOS-CX output queue.

Review archive permissions, encryption state, retention policy, sensitive fields, backup audit trail and restore rights. This step pertains to Safe configuration archiving and secret handling but is not one of the two complementary decisions in this case. The required response and evidence are: Compare deployed AOS-CX configurations against approved Aruba Central templates or version-controlled intended state and record exceptions. Together with: Inspect desired versus running settings, group assignments, local overrides, timestamps and change-owner approvals. Scenario: A scheduled audit reports a switch compliant solely because it checked group membership, not actual effective settings.

Establish prechange checkpoints, defined retention and restore testing for AOS-CX configuration changes across managed devices. This step pertains to Configuration checkpoint and rollback retention but is not one of the two complementary decisions in this case. The required response and evidence are: Compare deployed AOS-CX configurations against approved Aruba Central templates or version-controlled intended state and record exceptions. Together with: Inspect desired versus running settings, group assignments, local overrides, timestamps and change-owner approvals. Scenario: A scheduled audit reports a switch compliant solely because it checked group membership, not actual effective settings.

The specific workload driving CPU spikes is isolated and reduced while valid control-plane features remain enabled. This step pertains to High CPU and control-plane protocol churn but is not one of the two complementary decisions in this case. The required response and evidence are: Compare deployed AOS-CX configurations against approved Aruba Central templates or version-controlled intended state and record exceptions. Together with: Inspect desired versus running settings, group assignments, local overrides, timestamps and change-owner approvals. Scenario: A scheduled audit reports a switch compliant solely because it checked group membership, not actual effective settings.

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: Build an operational view correlating site reachability, interface error state, routing stability and user impact for prioritized response. Scenario: A major uplink failure produces separate LLDP, routing and interface alerts that nobody correlates.

Monitor authentication success ratios, rejected sessions, policy role assignment and known exception endpoints by switch/site. This action instead applies to Client authentication and port-role operational reports. Auth rate and authorization role must both be checked; success in RADIUS does not guarantee usable network access. It does not directly resolve the controlling requirement. The targeted response is: Build an operational view correlating site reachability, interface error state, routing stability and user impact for prioritized response. Scenario: A major uplink failure produces separate LLDP, routing and interface alerts that nobody correlates.

Interpret VSX health, keepalive, ISL, synchronization and active-gateway status before planning peer maintenance. This action instead applies to VSX health telemetry and failover readiness. VSX synchronization status is not equivalent to complete end-to-end forwarding health or upstream route correctness. It does not directly resolve the controlling requirement. The targeted response is: Build an operational view correlating site reachability, interface error state, routing stability and user impact for prioritized response. Scenario: A major uplink failure produces separate LLDP, routing and interface alerts that nobody correlates.

Inspect routing process events, neighbor restart counters, route-table changes, forwarding next hops and convergence timestamps. These checks can help with Routing adjacency and convergence telemetry interpretation, but they are not the most discriminating first evidence here. Examine: Inspect desired versus running settings, group assignments, local overrides, timestamps and change-owner approvals. Scenario: A port-security setting differs across identical access closets after an emergency manual exception.

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: Inspect desired versus running settings, group assignments, local overrides, timestamps and change-owner approvals. Scenario: A port-security setting differs across identical access closets after an emergency manual exception.

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 desired versus running settings, group assignments, local overrides, timestamps and change-owner approvals. Scenario: A port-security setting differs across identical access closets after an emergency manual exception.

A redundant path remains correctly controlled while a mistaken loop or root shift is isolated. This step pertains to STP blocking and topology-loop recognition but is not one of the two complementary decisions in this case. The required response and evidence are: Reconcile the approved design with actual interfaces, optics, firmware, cable labels and final switch configurations after deployment. Together with: Compare installation photos, running and startup configs, topology neighbors, asset inventory and exception log. Scenario: A new switch is installed with a different software version than the approved baseline but no deviation is recorded.

Document inter-switch, keepalive and upstream links according to the chosen HA topology with distinct failure paths where applicable. This step pertains to Resilient peer cabling and link map but is not one of the two complementary decisions in this case. The required response and evidence are: Reconcile the approved design with actual interfaces, optics, firmware, cable labels and final switch configurations after deployment. Together with: Compare installation photos, running and startup configs, topology neighbors, asset inventory and exception log. Scenario: A new switch is installed with a different software version than the approved baseline but no deviation is recorded.

Inspect license tiers, serial entitlement, firmware support, account ownership and permitted network access. This step pertains to Campus management and licensing boundaries but is not one of the two complementary decisions in this case. The required response and evidence are: Reconcile the approved design with actual interfaces, optics, firmware, cable labels and final switch configurations after deployment. Together with: Compare installation photos, running and startup configs, topology neighbors, asset inventory and exception log. Scenario: A new switch is installed with a different software version than the approved baseline but no deviation is recorded.

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: Inspect VSX peer role, keepalive state, ISL counters, MAC or VLAN synchronization and downstream LAG state. Scenario: Users on one MC-LAG lose access after an ISL failure although other VLANs remain healthy.

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 VSX peer role, keepalive state, ISL counters, MAC or VLAN synchronization and downstream LAG state. Scenario: Users on one MC-LAG lose access after an ISL failure although other VLANs remain healthy.

Inspect endpoint lease, L3 interface prefix, ARP table, default route, and duplicate-IP detection logs. These checks can help with IP addressing subnet and gateway mismatch, but they are not the most discriminating first evidence here. Examine: Inspect VSX peer role, keepalive state, ISL counters, MAC or VLAN synchronization and downstream LAG state. Scenario: Users on one MC-LAG lose access after an ISL failure although other VLANs remain healthy.

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: Classify traffic at supported trust boundaries and map DSCP/802.1p markings into queues consistent with the approved policy. Scenario: A traffic-class policy references a DSCP value not mapped to the intended AOS-CX output queue.

Provide a supported resilient default gateway design and test active-forwarding behavior under peer failure. This action instead applies to VRRP or active gateway redundant gateway behavior. A shared-looking gateway IP does not prove failover is configured or that the chosen platform supports the intended mechanism. It does not directly resolve the controlling requirement. The targeted response is: Classify traffic at supported trust boundaries and map DSCP/802.1p markings into queues consistent with the approved policy. Scenario: A traffic-class policy references a DSCP value not mapped to the intended AOS-CX output queue.

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: Classify traffic at supported trust boundaries and map DSCP/802.1p markings into queues consistent with the approved policy. Scenario: A traffic-class policy references a DSCP value not mapped to the intended AOS-CX output queue.