NSX upgrade pre-check failed with an error indicating "Overall status of edge transport node <UUID> is UNKNOWN" for an Edge Transport Node.

Products

• VMware NSX

Issue/Introduction

• You are upgrading NSX via SDDC and while running pre-checks you are prompted with error stating "Overall status of edge transport node <UUID> is UNKNOWN" 
  
  
  
  
• When validated from NSX UI, the controller connectivity of the affected edge node is in an "unknown" state.
• CLI validation on the Edge node revealed that controller connectivity and manager connectivity are both good and ports 1234/1235 are confirmed to be connecting fine via nc (netcat) command
  
  
  

Environment

VMware NSX
VMware NSX-T Datacenter

Resolution

Since the required network connectivity between the problem edge node and the manager nodes are fine, follow the below steps to see if these resolve the issue.

• Try restarting nsx-nestdb agent and nsx-opsagent on the problem edge node using below commands from root shell
  
  # /etc/init.d/nsx-nestdb restart
# /etc/init.d/nsx-opsagent restart
  
  Note: In NSX 4.x version the agent name is 'nsx-opsagent-appliance'
  
  
• Perform sync operation for the respective edge node.

If the issue persists after trying the above steps, please open a case with Broadcom Support Team for further troubleshooting