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Review LLDP neighbor identifiers, chassis and port IDs and the physical patching record for the affected link. This instead concerns lldp neighbor identification. LLDP exposes directly connected device identifiers, helping distinguish mispatching from routing or WLAN failures without guessing topology. It is not one of the requested paired diagnosis and configuration actions. The immediate problem concerns ipv6 ra and default-router discovery.

Match both ends' LACP settings and compatible member parameters in the approved aggregation group. This instead concerns lag uplink membership and hashing. LACP builds a logical link only from mutually compatible members; physical link-up does not guarantee aggregation eligibility. It is not one of the requested paired diagnosis and configuration actions. The immediate problem concerns ipv6 ra and default-router discovery.

Inspect LACP partner identifiers, actor state, member compatibility and active aggregated-port status. This instead concerns lag uplink membership and hashing. LACP builds a logical link only from mutually compatible members; physical link-up does not guarantee aggregation eligibility. It does not isolate the cause of the stated incident. The immediate problem concerns lldp neighbor identification.

Inspect DHCP-provided resolver information, DNS name resolution and reachability to the management service endpoint. This instead concerns ap dns and management reachability. An AP can have valid local addressing while failing discovery if name resolution or reachability to its intended management service is broken. It does not isolate the cause of the stated incident. The immediate problem concerns lldp neighbor identification.

Inspect client DHCP discovery, relay destination configuration and permitted server reply path at the VLAN gateway. This instead concerns dhcp scope and relay on routed vlans. A DHCP broadcast does not normally cross a routed boundary without relay; correct scope and return reachability are both necessary. It does not isolate the cause of the stated incident. The immediate problem concerns lldp neighbor identification.

Align both ends' LACP settings and compatible member parameters in the approved aggregation group. This instead concerns lag uplink membership and hashing. LACP builds a logical link only from mutually compatible members; physical link-up does not guarantee aggregation eligibility. It would not implement the specifically required change. The immediate problem concerns lldp neighbor identification.

Set valid site DNS resolvers and the supported AP management destination in the existing provisioned configuration. This instead concerns ap dns and management reachability. An AP can have valid local addressing while failing discovery if name resolution or reachability to its intended management service is broken. It would not implement the specifically required change. The immediate problem concerns lldp neighbor identification.

Configure the appropriate DHCP relay on the routed interface and ensure the server scope and return path match the client subnet. This instead concerns dhcp scope and relay on routed vlans. A DHCP broadcast does not normally cross a routed boundary without relay; correct scope and return reachability are both necessary. It would not implement the specifically required change. The immediate problem concerns lldp neighbor identification.

Confirm both expected links are collecting and distributing and balanced flows pass without new interface errors. This instead concerns lag uplink membership and hashing. LACP builds a logical link only from mutually compatible members; physical link-up does not guarantee aggregation eligibility. It would not establish that this function actually works. The immediate problem concerns lldp neighbor identification.

Verify the AP resolves the expected control-plane hostname and appears online in its assigned management inventory. This instead concerns ap dns and management reachability. An AP can have valid local addressing while failing discovery if name resolution or reachability to its intended management service is broken. It would not establish that this function actually works. The immediate problem concerns lldp neighbor identification.

Capture DHCP discover, relay, offer and acknowledgment packets to confirm clients receive appropriate leases. This instead concerns dhcp scope and relay on routed vlans. A DHCP broadcast does not normally cross a routed boundary without relay; correct scope and return reachability are both necessary. It would not establish that this function actually works. The immediate problem concerns lldp neighbor identification.

Restore the former compatible LAG membership and disable the mismatched link until its configuration is corrected. This instead concerns lag uplink membership and hashing. LACP builds a logical link only from mutually compatible members; physical link-up does not guarantee aggregation eligibility. It would not safely roll back the relevant failed change. The immediate problem concerns lldp neighbor identification.

Restore the last verified DNS settings for the site and confirm AP control connectivity before retrying the change. This instead concerns ap dns and management reachability. An AP can have valid local addressing while failing discovery if name resolution or reachability to its intended management service is broken. It would not safely roll back the relevant failed change. The immediate problem concerns lldp neighbor identification.

Reinstate the previous relay configuration and server route to restore leases while the new path is investigated. This instead concerns dhcp scope and relay on routed vlans. A DHCP broadcast does not normally cross a routed boundary without relay; correct scope and return reachability are both necessary. It would not safely roll back the relevant failed change. The immediate problem concerns lldp neighbor identification.

Review LACP partner identifiers, actor state, member compatibility and active aggregated-port status. This instead concerns lag uplink membership and hashing. LACP builds a logical link only from mutually compatible members; physical link-up does not guarantee aggregation eligibility. It does not isolate the cause of the stated incident. The immediate problem concerns lldp neighbor identification.

Review DHCP-provided resolver information, DNS name resolution and reachability to the management service endpoint. This instead concerns ap dns and management reachability. An AP can have valid local addressing while failing discovery if name resolution or reachability to its intended management service is broken. It does not isolate the cause of the stated incident. The immediate problem concerns lldp neighbor identification.

Review client DHCP discovery, relay destination configuration and permitted server reply path at the VLAN gateway. This instead concerns dhcp scope and relay on routed vlans. A DHCP broadcast does not normally cross a routed boundary without relay; correct scope and return reachability are both necessary. It does not isolate the cause of the stated incident. The immediate problem concerns lldp neighbor identification.

Match both ends' LACP settings and compatible member parameters in the approved aggregation group. This instead concerns lag uplink membership and hashing. LACP builds a logical link only from mutually compatible members; physical link-up does not guarantee aggregation eligibility. It would not implement the specifically required change. The immediate problem concerns lldp neighbor identification.

Apply valid site DNS resolvers and the supported AP management destination in the existing provisioned configuration. This instead concerns ap dns and management reachability. An AP can have valid local addressing while failing discovery if name resolution or reachability to its intended management service is broken. It would not implement the specifically required change. The immediate problem concerns lldp neighbor identification.

Set up the appropriate DHCP relay on the routed interface and ensure the server scope and return path match the client subnet. This instead concerns dhcp scope and relay on routed vlans. A DHCP broadcast does not normally cross a routed boundary without relay; correct scope and return reachability are both necessary. It would not implement the specifically required change. The immediate problem concerns lldp neighbor identification.

Review LACP partner identifiers, actor state, member compatibility and active aggregated-port status. This instead concerns lag uplink membership and hashing. LACP builds a logical link only from mutually compatible members; physical link-up does not guarantee aggregation eligibility. It is not one of the requested paired diagnosis and configuration actions. The immediate problem concerns lldp neighbor identification.

Apply valid site DNS resolvers and the supported AP management destination in the existing provisioned configuration. This instead concerns ap dns and management reachability. An AP can have valid local addressing while failing discovery if name resolution or reachability to its intended management service is broken. It is not one of the requested paired diagnosis and configuration actions. The immediate problem concerns lldp neighbor identification.

Reinstate the former compatible LAG membership and disable the mismatched link until its configuration is corrected. This instead concerns lag uplink membership and hashing. LACP builds a logical link only from mutually compatible members; physical link-up does not guarantee aggregation eligibility. It would not safely roll back the relevant failed change. The immediate problem concerns lldp neighbor identification.

Reinstate the last verified DNS settings for the site and confirm AP control connectivity before retrying the change. This instead concerns ap dns and management reachability. An AP can have valid local addressing while failing discovery if name resolution or reachability to its intended management service is broken. It would not safely roll back the relevant failed change. The immediate problem concerns lldp neighbor identification.

Restore the previous relay configuration and server route to restore leases while the new path is investigated. This instead concerns dhcp scope and relay on routed vlans. A DHCP broadcast does not normally cross a routed boundary without relay; correct scope and return reachability are both necessary. It would not safely roll back the relevant failed change. The immediate problem concerns lldp neighbor identification.

Inspect DHCP-provided resolver information, DNS name resolution and reachability to the management service endpoint. This instead concerns ap dns and management reachability. An AP can have valid local addressing while failing discovery if name resolution or reachability to its intended management service is broken. It does not isolate the cause of the stated incident. The immediate problem concerns lag uplink membership and hashing.

Inspect client DHCP discovery, relay destination configuration and permitted server reply path at the VLAN gateway. This instead concerns dhcp scope and relay on routed vlans. A DHCP broadcast does not normally cross a routed boundary without relay; correct scope and return reachability are both necessary. It does not isolate the cause of the stated incident. The immediate problem concerns lag uplink membership and hashing.

Compare management interface or VRF assignments, reachability paths and source-access controls for administrative traffic. This instead concerns management vlan access isolation. Data-plane connectivity and administrative reachability serve different trust boundaries; a dedicated management design restricts who can configure devices. It does not isolate the cause of the stated incident. The immediate problem concerns lag uplink membership and hashing.

Set valid site DNS resolvers and the supported AP management destination in the existing provisioned configuration. This instead concerns ap dns and management reachability. An AP can have valid local addressing while failing discovery if name resolution or reachability to its intended management service is broken. It would not implement the specifically required change. The immediate problem concerns lag uplink membership and hashing.

Configure the appropriate DHCP relay on the routed interface and ensure the server scope and return path match the client subnet. This instead concerns dhcp scope and relay on routed vlans. A DHCP broadcast does not normally cross a routed boundary without relay; correct scope and return reachability are both necessary. It would not implement the specifically required change. The immediate problem concerns lag uplink membership and hashing.

Place management traffic in the approved dedicated interface or VRF and constrain permitted administrator sources. This instead concerns management vlan access isolation. Data-plane connectivity and administrative reachability serve different trust boundaries; a dedicated management design restricts who can configure devices. It would not implement the specifically required change. The immediate problem concerns lag uplink membership and hashing.