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An unrelated outbound standard ACL on the WAN is not equivalent to applying the named extended STAFF-WEB rule to inbound traffic from VLAN 25. Standard ACLs normally match source IPs and cannot express the same detailed transport and destination rules as an extended list. Even if that WAN policy affects some flows later, it does not prove the intended VLAN 25 ingress filtering is active.

Spanning-tree PortFast governs Layer 2 state transitions on suitable host-facing switchports; it does not bind an IPv4 ACL to the routed VLAN gateway. VLAN 25 clients might forward at Layer 2 normally while the extended security policy remains unused. The question is about applying and confirming IP packet filtering, not STP access-port convergence.

Renaming a wireless SSID to STAFF-WEB only changes the WLAN identifier seen by clients. It does not reference a named IOS access-list object or attach its ACEs to ingress VLAN 25 routing. Even an SSID with the same text as an ACL has no automatic relationship unless explicitly integrated through a supported controller policy, which is absent here.

Changing router-id under an already running OSPF process does not normally rewrite the identifier within all established adjacencies instantly without disruption. Peers use router IDs to track protocol neighbors and LSAs, so changing identity requires the process to reinitialize appropriately. Expect a deliberate reset or reload window, not a seamless live rename of every existing OSPF relationship.

IPv4 default routes govern forwarding for destinations without more-specific matches; they do not select or apply an OSPF router identifier. Changing every default route would risk production forwarding and leave the running OSPF process using its current identity until restarted. Router ID is a control-plane identifier configured in the OSPF process, not a property of next-hop route statements.

Cisco IOS supports an explicit OSPF router-id configuration, which overrides automatic selection when activated through the appropriate process lifecycle. The command is not ignored; the confusion is that the new ID usually waits for a restart. It can be chosen independently of whether any interface is actually assigned that exact IPv4 address.

Assigning both host access ports to VLAN 1 would put clients in the wrong broadcast domain and abandon the requirement for VLAN 22. The host ports must share VLAN 22, not merely share a common default VLAN. Using VLAN 1 as a workaround can also violate segmentation policy; it does not repair missing VLAN 22 membership or trunk transport.

Two hosts in the same IPv4 subnet and same VLAN communicate by direct Layer 2 forwarding and ARP; they do not require inter-VLAN IP routing on both switches. Enabling ip routing would be necessary for a suitable Layer 3 switching design, not for the ordinary same-broadcast-domain communication described. The problem can be solved with correct local VLANs, access assignments and trunk forwarding.

A native VLAN determines handling of untagged frames on an 802.1Q trunk and is not automatically the IPv4 default-gateway address for hosts. Same-subnet hosts in VLAN 22 can communicate directly without using a router gateway; any off-subnet gateway must be an IP address reachable on the host's network. Confusing VLAN ID with an IP first hop cannot enable Layer 2 communication.

For a conventional /27 subnet, the low endpoint.32 is the network identifier because all five host bits are zero. Hosts cannot ordinarily use that network address as their unicast IP assignment. The first usable host is one greater,.33, while the broadcast is the top endpoint.63. Confusing the network ID with the first device address is a common subnetting error.

There is no automatic reservation of a router address at.33 when calculating the first mathematically usable host. A network administrator may choose.33 for the gateway, but that would be an operational allocation choice, not an IPv4 subnetting rule. The question asks for the conventional first assignable address irrespective of what equipment will use it.

The.63 endpoint has all five /27 host bits equal to one, so it is the directed broadcast for the 10.40.18.32/27 subnet rather than a valid normal host. It cannot simultaneously be the first usable host at the high end. A /27's first and last values serve different reserved functions; their arithmetic is independent of the number of connected devices.

The bracketed numbers use the IOS format [administrative distance/metric]; 110 is the OSPF administrative distance and 18 or 33 is the path metric. The claim reverses those meanings by treating 18 and 33 as administrative distances. Even if they were path costs, a router must first determine which destination prefix contains the packet's address before comparing metrics for eligible routes to the same prefix.

A next-hop address can be part of a selected route, but choosing the numerically smallest next-hop IP is not the ordinary destination-based routing decision. For 192.0.2.200, the route through 10.1.1.3 is associated with the matching upper /25. The router does not prefer 10.1.1.2 merely because it has a smaller address or metric on a different prefix.

OSPF can install many routes with the same prefix length when they cover different destination networks. Here the two /25s refer to separate halves of 192.0.2.0/24, so both can be valid simultaneously. Prefix length alone does not imply an installation conflict. Each route is chosen by whether the actual packet destination lies inside that network.

An underlay can carry IP reachability between fabric nodes and may support security controls, but successfully displaying a controller policy does not automatically encrypt all user traffic. Encryption requires particular protocols or device capabilities and their deployment and verification. The observed discrepancy is between desired controller state and actual switch forwarding state, not proof of a universal confidentiality service.

A controller's policy document is control-plane intent or a desired-state representation, while switches still maintain MAC and routing forwarding information. Reading a successful policy page does not replace hardware tables with text. Devices must receive and successfully apply the relevant configuration or state before packet behavior changes. Confusing intent with data-plane state would leave the issue undiagnosed.

Parsing a JSON document confirms that its syntax is valid, not that the desired network configuration has been installed or is consistent with device capabilities. A controller can accept valid JSON while a southbound push fails or a switch rejects a policy. Real assurance requires operational evidence such as installed interface/route state and relevant traffic tests.

Matching Ethernet duplex settings is important for link performance and avoiding late collisions, but it does not synchronize clock time between devices. Two perfectly healthy interfaces can produce logs with inconsistent timestamps if their clocks drift. The outage investigation requires verifying time sources and synchronization state, not merely physical link negotiation agreement.

Syslog severity numbers classify importance and can help filter events, but the severity value does not set the clock or align timestamps across routers. Increasing or standardizing severity cannot resolve a device whose time is minutes behind. Event correlation depends on credible timekeeping, so investigate NTP associations and reported synchronization first.

Manually setting clocks once and disabling NTP can lead to drift, especially across devices with different oscillators or reboots. It may provide temporary approximate time in a lab but is not a robust strategy for correlated production incident records. Regular synchronization against trustworthy time sources is more defensible than one-time manual matching.

Dynamic ARP Inspection does not fabricate unlimited trusted IP-to-MAC mappings when DHCP snooping data is absent. On untrusted ports it ordinarily validates ARP packets against permitted bindings or explicitly configured ARP ACL rules. If those reference mappings are missing, legitimate requests can be treated as invalid. The service needs trustworthy evidence of which IP address belongs to which client MAC and port.

DAI inspects Ethernet ARP messages for spoofing indicators; it is not a mechanism for encrypting DHCP lease traffic. DHCP snooping builds a binding database based on trusted DHCP exchanges and is conceptually separate from encryption. Enabling inspection without valid bindings affects ARP admission, not confidentiality of client address negotiations.

Spanning tree manages Layer 2 loop prevention and port forwarding roles, while Dynamic ARP Inspection governs validation of ARP messages in selected VLANs. A binding-table gap will not inherently disable every STP port in VLAN 30. Instead, hosts may fail ARP neighbor resolution while their links and spanning-tree states still appear operational.

PVST stands for per-VLAN spanning tree, and Rapid PVST+ extends rapid convergence to separate VLAN instances; it is not necessarily one global topology shared by all VLANs. A single global tree would resemble a different STP mode or instance mapping. The question explicitly uses Rapid PVST+ and two VLANs, so differing port roles are expected and valid.

An 802.1Q trunk can carry multiple tagged VLANs while spanning tree still controls whether each VLAN is permitted to forward over redundant paths. Tagging does not automatically disable loop prevention. If VLAN 10 is blocking on one trunk and VLAN 20 is forwarding there, those distinct decisions arise from per-VLAN STP state, not a lack of STP.

VLANs are logical Layer 2 broadcast domains transported over shared physical links; creating VLAN 20 does not produce a new cable. Rapid PVST+ can apply different forwarding roles on the same physical uplinks because it treats VLAN instances separately. The physical topology is shared even when the active logical path differs by VLAN.

If PC-B changes to /25 while PC-A keeps /25, PC-A at.10 belongs to 192.0.2.0/25 and PC-B at.130 belongs to 192.0.2.128/25. Those are different subnets, so the hosts do not meet the requirement of a single local IPv4 subnet. Merely making the masks match at /25 fails because their addresses fall on opposite sides of the /25 boundary.

A host decides whether a destination is on-link from its own IP address and subnet mask, not by asking whether two computers share the same default gateway. The original mismatched masks cause PC-A to regard.130 as remote while PC-B at /24 sees.10 as local. Setting the same gateway without fixing masks leaves that asymmetric subnet classification in place.

A /26 mask on PC-A at.10 would put it in 192.0.2.0/26, while PC-B at /24 would remain in 192.0.2.0/24. PC-A would still consider.130 off-link, so the masks would not describe the same subnet boundary. The change narrows PC-A's on-link set rather than reconciling the two hosts.

A healthy OSPF route with distance 110 remains preferred over a static candidate with distance 190 for the same destination prefix. Keeping every route and preference unchanged would leave the backup static out of active forwarding. Different metrics within OSPF do not alter the basic comparison to an unrelated floating route's higher administrative distance.

Renaming or re-labeling an unrelated default route does not affect the installed OSPF /24 route's preference or eligibility. The router still chooses the longest matching destination prefix first, and the healthy OSPF route remains a better same-prefix candidate than the floating static. A management label change cannot create the specified primary failure condition.

A static route's metric is not the preference control that ordinarily makes it win against OSPF for the same prefix. With distance 190 on the floating static and distance 110 on OSPF, administrative distance selects OSPF first when both are eligible. Assigning a lower unspecified metric to the static line without changing distance or primary validity does not reverse that source preference.