📖 ~1 min read
Table of contents
Symptom & Impact
DHCP failover partner communication intermittently fails, causing lease sync lag.
Environment & Reproduction
Appears after NIC advanced-property changes on DHCP nodes.
Get-DhcpServerv4Failover
Get-NetAdapterAdvancedProperty -Name 'Ethernet'Root Cause Analysis
Offload/packet steering changes alter timing and packet handling for failover replication traffic.
Quick Triage
Validate partner state and inspect NIC settings changed in recent maintenance.
Step-by-Step Diagnosis
Capture failover event IDs and compare with adapter error counters.
Solution — Primary Fix
Revert unstable advanced properties, update NIC driver, and reinitialize partner sync.
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Set-NetAdapterAdvancedProperty -Name 'Ethernet' -DisplayName 'Large Send Offload v2 (IPv4)' -DisplayValue 'Disabled'
Restart-Service DHCPServerSolution — Alternative Approaches
Temporarily increase MCLT and monitor manual replication while driver rollout proceeds.
Verification & Acceptance Criteria
Failover state remains Normal and lease updates replicate without delay.
Rollback Plan
Restore previous adapter profile export and failover relationship settings.
Prevention & Hardening
Freeze NIC tuning baselines on DHCP infrastructure and audit drift.
Related Errors & Cross-Refs
Related to NDIS LWF packet loss and tcpip DPC latency issues.
Related tutorial: View the step-by-step tutorial for Windows Server 2019.
View all Windows Server 2019 tutorials on the Tutorials Hub →
Browse all common problems & solutions on the Tutorials Hub.
References & Further Reading
Microsoft DHCP failover and network adapter tuning documentation.
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