Inspect interface-to-zone mapping, session tuple, policy match and deny logs. This check would diagnose Firewall security-zone policy, but would not first isolate the described Redundancy failover path verification. Begin with: Correlate BFD and VRRP events with actual packet captures, route tables and application checks.

Inspect BGP aggregate configuration, contributor routes, specific exceptions and next-hop forwarding. This check would diagnose BGP prefix aggregation and specifics, but would not first isolate the described Redundancy failover path verification. Begin with: Correlate BFD and VRRP events with actual packet captures, route tables and application checks.

Inspect VRRP group priorities, owner role, master/backup status and election logs. This check would diagnose VRRP priority and intended master, but would not first isolate the described Redundancy failover path verification. Begin with: Correlate BFD and VRRP events with actual packet captures, route tables and application checks.

Repair the allowed IS-IS database synchronization exchanges and check CSNP/PSNP and LSP sequence handling. This is a legitimate response to the different issue of IS-IS CSNP and PSNP database sync, but it does not correct the specific DHCP relay to remote server condition reported. The relevant technical distinction is: DHCP relays forward client broadcast requests to DHCP servers outside the local broadcast domain.

Design an approved VLAN pool and DHCP capacity plan aligned with WLAN user groups and roaming behavior. This is a legitimate response to the different issue of WLAN VLAN pool address distribution, but it does not correct the specific DHCP relay to remote server condition reported. The relevant technical distinction is: DHCP relays forward client broadcast requests to DHCP servers outside the local broadcast domain.

Configure compatible SNMPv3 authentication, privacy, monitoring views and authorized manager access. This is a legitimate response to the different issue of SNMPv3 secure network monitoring, but it does not correct the specific DHCP relay to remote server condition reported. The relevant technical distinction is: DHCP relays forward client broadcast requests to DHCP servers outside the local broadcast domain.

Only permitted management clients retrieve expected counters over the approved secure SNMP profile. That observation would support a separate case of SNMPv3 secure network monitoring, not verification of the reported DHCP relay to remote server. The relevant observable outcome here is: Clients obtain a valid address lease, gateway and DNS options from the authorized remote DHCP server.

APs recover management from the backup AC and retain approved WLAN service within recovery objectives. That observation would support a separate case of WLAN AC high availability, not verification of the reported DHCP relay to remote server. The relevant observable outcome here is: Clients obtain a valid address lease, gateway and DNS options from the authorized remote DHCP server.

The intended region shares coherent instance topology and redundant paths remain loop-free. That observation would support a separate case of MSTP region mismatch on trunks, not verification of the reported DHCP relay to remote server. The relevant observable outcome here is: Clients obtain a valid address lease, gateway and DNS options from the authorized remote DHCP server.

VRRP presents a shared virtual IP/MAC gateway that a current master forwards on behalf of the group. This explains VRRP virtual gateway and ownership, but not why the issue in this scenario occurs. The specific mechanism is: DHCP relays forward client broadcast requests to DHCP servers outside the local broadcast domain.

BFD detects forwarding failures rapidly and can notify upper-layer routing protocols or route tracking. This explains BFD fast failure detection tied to route, but not why the issue in this scenario occurs. The specific mechanism is: DHCP relays forward client broadcast requests to DHCP servers outside the local broadcast domain.

SNMPv3 can authenticate and encrypt network management telemetry and restrict accessible MIB views. This explains SNMPv3 secure network monitoring, but not why the issue in this scenario occurs. The specific mechanism is: DHCP relays forward client broadcast requests to DHCP servers outside the local broadcast domain.

Allowing broad unauthenticated SNMP can expose sensitive device and interface details. This consequence is associated more directly with SNMPv3 secure network monitoring. For the stated conditions the immediate exposure is: Changing DNS alone cannot repair missing DHCP relay or unreachable server paths.

An otherwise live router can remain a dead-end gateway without relevant upstream tracking. This consequence is associated more directly with VRRP uplink tracking and priority decrement. For the stated conditions the immediate exposure is: Changing DNS alone cannot repair missing DHCP relay or unreachable server paths.

Unrealistically short timers can trigger false failures and route flapping. This consequence is associated more directly with BFD detection timers and false alarms. For the stated conditions the immediate exposure is: Changing DNS alone cannot repair missing DHCP relay or unreachable server paths.

Inspect AP address, controller discovery, CAPWAP control status and AC join logs. This check would diagnose WLAN AC and Fit AP CAPWAP, but would not first isolate the described DHCP relay to remote server. Begin with: Inspect VLANIF relay configuration, DHCPDISCOVER/OFFER packets and server scope.

Inspect PBR classifier, interface direction, policy hits and a traffic trace. This check would diagnose Policy-based routing for approved application, but would not first isolate the described DHCP relay to remote server. Begin with: Inspect VLANIF relay configuration, DHCPDISCOVER/OFFER packets and server scope.

Inspect SNMP version, users, security level, access views, manager ACL and polling errors. This check would diagnose SNMPv3 secure network monitoring, but would not first isolate the described DHCP relay to remote server. Begin with: Inspect VLANIF relay configuration, DHCPDISCOVER/OFFER packets and server scope.

Use an approved VRRP preemption or delay setting that matches stable maintenance and recovery goals. This is a legitimate response to the different issue of VRRP preemption maintenance behavior, but it does not correct the specific DHCP relay to remote server condition reported. The relevant technical distinction is: DHCP relays forward client broadcast requests to DHCP servers outside the local broadcast domain.

Configure compatible SNMPv3 authentication, privacy, monitoring views and authorized manager access. This is a legitimate response to the different issue of SNMPv3 secure network monitoring, but it does not correct the specific DHCP relay to remote server condition reported. The relevant technical distinction is: DHCP relays forward client broadcast requests to DHCP servers outside the local broadcast domain.

Configure supported inter-subnet or inter-AC roaming design appropriate to the mobility domain. This is a legitimate response to the different issue of Campus WLAN layer-3 roaming, but it does not correct the specific DHCP relay to remote server condition reported. The relevant technical distinction is: DHCP relays forward client broadcast requests to DHCP servers outside the local broadcast domain.

The preferred gateway is master under healthy conditions and backup is ready for takeover. That observation would support a separate case of VRRP priority and intended master, not verification of the reported DHCP relay to remote server. The relevant observable outcome here is: Clients obtain a valid address lease, gateway and DNS options from the authorized remote DHCP server.

Approved operators log in with accountable roles while unauthorized commands and Telnet access fail. That observation would support a separate case of Device management AAA and SSH security, not verification of the reported DHCP relay to remote server. The relevant observable outcome here is: Clients obtain a valid address lease, gateway and DNS options from the authorized remote DHCP server.

Only permitted management clients retrieve expected counters over the approved secure SNMP profile. That observation would support a separate case of SNMPv3 secure network monitoring, not verification of the reported DHCP relay to remote server. The relevant observable outcome here is: Clients obtain a valid address lease, gateway and DNS options from the authorized remote DHCP server.

Uncontrolled mutual route import can form routing feedback loops and unstable route selection. This explains Route import feedback loop, but not why the issue in this scenario occurs. The specific mechanism is: DHCP relays forward client broadcast requests to DHCP servers outside the local broadcast domain.

SNMPv3 can authenticate and encrypt network management telemetry and restrict accessible MIB views. This explains SNMPv3 secure network monitoring, but not why the issue in this scenario occurs. The specific mechanism is: DHCP relays forward client broadcast requests to DHCP servers outside the local broadcast domain.

WLAN Layer 3 roaming may require mobility context and forwarding support beyond ordinary Layer 2 reassociation. This explains Campus WLAN layer-3 roaming, but not why the issue in this scenario occurs. The specific mechanism is: DHCP relays forward client broadcast requests to DHCP servers outside the local broadcast domain.

Uncontrolled failback can cause unnecessary outages after the original fault is repaired. This consequence is associated more directly with VRRP preemption maintenance behavior. For the stated conditions the immediate exposure is: Changing DNS alone cannot repair missing DHCP relay or unreachable server paths.

Treating a displayed RIB route as proof of working forwarding can prolong a blackhole. This consequence is associated more directly with RIB-to-FIB forwarding discrepancy. For the stated conditions the immediate exposure is: Changing DNS alone cannot repair missing DHCP relay or unreachable server paths.

Allowing broad unauthenticated SNMP can expose sensitive device and interface details. This consequence is associated more directly with SNMPv3 secure network monitoring. For the stated conditions the immediate exposure is: Changing DNS alone cannot repair missing DHCP relay or unreachable server paths.

Inspect SNMP version, users, security level, access views, manager ACL and polling errors. This check would diagnose SNMPv3 secure network monitoring, but would not first isolate the described DHCP relay to remote server. Begin with: Inspect VLANIF relay configuration, DHCPDISCOVER/OFFER packets and server scope.

Inspect stack role, heartbeat, split-brain detection state and inter-member link health. This check would diagnose Switch stacking split-brain, but would not first isolate the described DHCP relay to remote server. Begin with: Inspect VLANIF relay configuration, DHCPDISCOVER/OFFER packets and server scope.

Inspect BFD state, discriminator pairing, detection time, route tracking and failover timing. This check would diagnose BFD fast failure detection tied to route, but would not first isolate the described DHCP relay to remote server. Begin with: Inspect VLANIF relay configuration, DHCPDISCOVER/OFFER packets and server scope.