🟠 High   ⏱ 5–30 min  Last verified: 18 May 2026
Affected versions: Windows Server 2022

📖 ~1 min read

Table of contents
  1. Symptom & Impact
  2. Environment & Reproduction
  3. Root Cause Analysis
  4. Quick Triage
  5. Step-by-Step Diagnosis
  6. Solution – Primary Fix
  7. Solution – Alternative Approaches
  8. Verification & Acceptance Criteria
  9. Rollback Plan
  10. Prevention & Hardening
  11. Related Errors & Cross-Refs
  12. References & Further Reading

Symptom & Impact

Lease synchronization stalls and one DHCP node serves stale allocation state, risking address conflicts.

Environment & Reproduction

Occurs after prolonged outage where peer server returns but state machine does not normalize.

Get-DhcpServerv4Failover
Get-DhcpServerv4ScopeStatistics -ScopeId

Root Cause Analysis

Communication recovery does not complete due to mismatch in shared secret, time drift, or stale relationship metadata.

Quick Triage

Confirm both services running and ports 647/647-related communication path healthy.

Step-by-Step Diagnosis

Inspect failover relationship details and compare last synchronized timestamps.

Get-DhcpServerv4Failover -Name  | fl *
Get-WinEvent -LogName Microsoft-Windows-DHCP-Server/Operational -MaxEvents 200
Illustrative mockup for windows-server-2022 — terminal_or_powershell
DHCP failover relationship status output — Illustrative mockup — Progressive Robot

Solution – Primary Fix

Resume normal state by re-establishing failover relationship sync.

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Invoke-DhcpServerv4FailoverReplication -Name  -Force
Set-DhcpServerv4Failover -Name  -State Normal
Illustrative mockup for windows-server-2022 — event_or_log_viewer
DHCP failover recovery events — Illustrative mockup — Progressive Robot

Solution – Alternative Approaches

Remove and recreate relationship during maintenance window when metadata corruption is suspected.

Verification & Acceptance Criteria

Both partners show Normal state and lease counts converge within expected tolerance.

Rollback Plan

If recreation fails, restore DHCP database backup and temporarily run single active DHCP authority.

Prevention & Hardening

Monitor failover state transitions and enforce NTP consistency across DHCP peers.

Frequently paired with duplicate lease issuance alarms and relay agent misrouting.

View all Windows Server 2022 tutorials on the Tutorials Hub →

Browse all common problems & solutions on the Tutorials Hub.

References & Further Reading

Microsoft Learn: DHCP failover lifecycle management and recovery operations.

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