NGAF HA Sync Failed After Firmware Upgrade
  

Muhammad Abid Lv2Posted Mar-25-2026 14:01

Issue Description:
After a successful firmware upgrade on Sangfor NGAF devices configured in High Availability (HA), synchronization between the Primary and Secondary nodes failed. The HA status displayed Out-of-Sync / Connection Abnormal, and configuration changes were not being replicated across devices.

Product & Version:
Sangfor NGAF – Firmware Version 8.0.x

Root Cause:
This issue can occur due to firmware version mismatch during the upgrade sequence or temporary interruption on the HA communication link. In some scenarios, configuration database checksum inconsistency or high latency on the heartbeat interface may also lead to synchronization failure.

Solution:

✅ Verified that both HA nodes were running the same firmware version
✅ Checked HA heartbeat interface connectivity, packet loss, and latency
✅ Restarted HA synchronization service from CLI on the secondary node
✅ Initiated manual configuration synchronization from the primary device
✅ Cleared temporary system cache (if required)
✅ Continuously monitored HA status until synchronization returned to Normal

Verification:
After performing manual synchronization and confirming HA link stability, both NGAF nodes returned to Normal Sync status. Configuration updates were successfully replicated, and production traffic remained stable without any service interruption.

Recommendation:
It is recommended to upgrade HA devices in a planned sequence (Secondary → Primary) and perform pre-upgrade health checks on HA link utilization and system resources to avoid synchronization issues.

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Humayun Ahmed Lv3Posted Mar-25-2026 18:47
  
Thanks to share!