NSX_SHA Agent Degraded with connection_down to nsx-nestdb

Products

• VMware NSX

Issue/Introduction

The NSX_SHA (Service Health Agent) displays a Degraded status on an ESXi transport node. The fault string shows connection_down:NAPP/wavefront/nsx-nestdb. The local NSX_NESTDB agent status on the same node displays as Up.

Cause

The netopad (Network Operations Agent) service responsible for telemetry forwarding has stalled, preventing NSX_SHA from exporting metrics from the local nsx-nestdb database to upstream receivers (NAPP or Wavefront).

Resolution

1. Connect via SSH to the affected ESXi transport node using root credentials.

2. Execute the following command to restart the telemetry agent: /etc/init.d/netopad restart

3. Allow 3 to 5 minutes for the service to initialize and rebuild local sockets.

4. Verify in the Agent Status UI that the NSX_SHA status has returned to Up and the fault string has cleared.

Note: This agent restart operation has no impact on the dataplane. Guest VM traffic forwarding and distributed firewall enforcement remain operational.

Additional Information

• NSX UI displays 'Unknown' status for NSX host transport nodes
• Some ESXi host transport nodes status are UNKNOWN