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A duplicate permit after an unconditional deny remains unreachable. The ordering problem must be fixed before the specific permitted flow can match.

Changing HTTPS to TCP 80 would match ordinary HTTP, not the required destination port 443, and still would not bypass the earlier unconditional deny.

ACL name text is not part of packet matching and cannot affect whether execution reaches a later line after an earlier deny.

Area and timer compatibility are prerequisites but a peer can still be in EXSTART due to other problems. Show ip ospf neighbor directly displays the live peer state.

A running OSPF process does not prove an individual peer is FULL. The neighbor summary reveals peer ID, adjacency state and affected interface.

Routes can survive through alternate neighbors even while one adjacency is down. Check show ip ospf neighbor for the actual peer state.

Subnet masks are Layer 3 settings and cannot fix attenuation or noise on an overlong copper physical link.

Optical fiber uses light and has different media reach and noise characteristics. Twisted pair is not equivalent to single-mode optics simply because both carry Ethernet frames.

A category cable designation does not remove PHY reach limits or electromagnetic effects over kilometers. High speeds may have additional distance restrictions.

Monitor mode observes radio conditions and threats, often without serving normal wireless data clients. It does not meet the guest association requirement.

Sniffer mode is intended for packet capture and troubleshooting rather than the ordinary production WLAN client connectivity requested.

Disconnection may trigger a supported resilience feature in some AP modes, but an undefined offline state is not the intended managed normal client service.

IPv6 stateless autoconfiguration is separate from DHCP for IPv4 addresses. It cannot obtain an IPv4 address lease by itself.

A local DHCP server offers leases to other clients; it does not cause the router interface itself to request and accept the provider's IPv4 assignment.

A VLAN trunk changes Layer 2 tagging and does not automatically initiate DHCP address acquisition on the routed WAN interface.

Controllers program or monitor forwarding devices; they are not necessarily in the path of every user frame. That would confuse control and data planes.

Hardware signal failures require media repair or redundant topology. Software controllers cannot restore broken optical fibers simply by changing intent.

Centralized orchestration still needs result validation and rollback capability. A policy push can fail or reach only part of the fleet.

A switch MAC table maps destination MACs to VLAN ports, not route prefixes or next-hop IPs.

Interface status helps identify failed links but does not list installed routes by static source. It is complementary to the routing table.

OSPF neighbor output shows adjacency relationships and states but cannot enumerate all configured or installed static IPv4 routes.

PSK strength affects authentication security, not which wired VLAN the controller selects after successful association. Weakening it creates risk.

Renaming an SSID changes the network's advertised label but does not alter where controller forwarding sends client frames.

Broadcasting more WLANs across APs increases coverage but does not repair a specific dynamic interface/VLAN mapping that sends staff clients to the wrong subnet.

The two endpoints can disagree even when the local setting looks correct. This mismatch requires checking both advertised and operating link modes and counters.

Media replacement can resolve physical faults but will not by itself correct incompatible negotiation settings. Compare actual operating duplex and speed on both ends first.

MTU changes frame-size acceptance, not how the ports select duplex or speed. The reported symptom is linked to negotiated physical operating modes.

One untagged address supplies only one logical Layer 3 interface and cannot distinguish the two tagged VLAN subnetworks without subinterfaces or other routed interfaces.

Port security constrains Layer 2 MAC usage on switchports and does not perform IP inter-VLAN routing or configure router subinterface addresses.

Changing the link to a single access VLAN would remove the intended carriage of two isolated VLANs, preventing both gateway subinterfaces from receiving frames.

The neighbor view is useful for identifying the failing peer, but show ip ospf interface is the direct source for local OSPF network type and timers.

IP and physical interface status do not include OSPF broadcast/point-to-point network-type configuration. Inspect the protocol-specific interface details.

Static route views do not report OSPF interface network type or Hello exchange parameters. Route entries may exist even when that interface is misconfigured.