NSX Alarm for GM to LM data synchronization error
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NSX Alarm for GM to LM data synchronization error


Article ID: 345793


Updated On:


VMware NSX Networking


Title: Alarm for GM to LM data synchronization error
Event ID: gm_to_lm_synchronization_error
Added in release: 3.2.0
Alarm Description:
  • Purpose: Data is not getting replicated between Global Manager (GM) and Local Manager (LM) for an extended period.
  • Impact: Any new intent created on GM will not be visible on LM.


VMware NSX-T Data Center


  1. Check the network connectivity between remote site and local site via ping.
  2. Ensure port TCP/1236 traffic is allowed between the local and remote sites.
  3. Ensure the async-replicator service is running on both local and remote sites.
    • Invoke the GET /api/v1/node/services/async_replicator/status NSX API or the get service async_replicator NSX CLI command to determine if the service is running.
    • If not running, invoke the POST /api/v1/node/services/async_replicator?action=restart NSX API or the restart service async_replicator NSX CLI to restart the service.
  4. Check /var/log/async-replicator/ar.log to see if there are errors reported.
  5. Collect a support bundle and contact the NSX support team.
Maintenance window required for remediation?

Additional Information

If you contact support for this issue, please include the following data:
  • NSX Manager Logs from all 3 Manager nodes in both the LM and GM NSX clusters.
  • ESXi host logs where Manager nodes are deployed in each environment.
  • vCenter server logs from the respective vSphere environments where the NSX managers are deployed.