NSX Manager Deployment Fails with "Error occured during vmdk transfer. Failed to connect to host <hostname.fqdn> on port 443

Products

• VMware NSX

Issue/Introduction

After a power outage, one of the NSX Manager nodes became corrupted and required replacement.

The faulty NSX Manager node was successfully detached and removed from the cluster. However, while attempting to deploy a new (3rd) NSX Manager node via the UI, the deployment failed with the following error:

Error occurred during vmdk transfer. Failed to connect to host <hostname> on port 443 from NSX. Fix the connectivity and retry the operation.

Environment

VMware NSX

Cause

 

• During Manager node deployment, NSX Manager will connect to the ESXi host where Manager Appliance will reside for transferring the required files.
• This issue occurs when NSX manager is unable to communicate with ESXi host on TCP port 443 for transferring the Manager vmdk files.

Resolution

NSX requires TCP port 443 to be open between NSX manager and ESXi hosts for management and provisioning connections.

• To resolve this issue, disable any firewall rules which may be blocking traffic between NSX Manager and ESXi hosts over TCP port 443 and retry the Manager deployment.
• To test connectivity between NSX Manager and ESXi hosts, use the below command from NSX manager root login

nc -zv <ESXi_Host_IP> <tcp port no>

Output of a successful connection:

root@324:~# nc -zv #.#.#.# 443
Connection to #.#.#.# 443 port [tcp/https] succeeded!

Additional Information

• For NSX-T Port Requirements refer VMware Ports and Protocols
• For NSX Edge Deployment Failures, see here