New VM creation or VM clone Failing due to NSXA down error on ESXi host.

Products

• VMware NSX

Issue/Introduction

• Creation/Provisioning of a new VM or Cloning of a new VM will also fail with the following error.
  
  
• "Currently connected network interface" 'Network adapter X' uses network 'DVSwitch[50 27 ## ## ## ## ## ##-## ## ## ## ## ## 9a be] NSX port group [dvportgroup-#####](nsxa down)', which is not accessible."

  
  
  
• The NSXA status displays as down in Net-VDS, causing the VM port attachment failure.
  
  
• VM creation then fails, and any attempt to attach the VM port to LS also fails.
  
  
• The net-dvs command outputs of the host display the nsxa status as down.
  For example:      
      net-dvs -l | grep "nsxa"
      "component.nsxa = down"

• Additionally, the ESXi hosts with NSXA down may appear with "Unknown" status in the NSX UI under System -> Fabric -> Hosts.

Environment

VMware NSX Data Center
VMware NSX

Resolution

1. Restart ESXi host services: services.sh restart
2. Wait a few seconds and rerun the check; nsxa should be up. and Provision/Cloning of New VM should succeed 
   For example:      
       net-dvs -l | grep "nsxa"
        "component.nsxa = up"

Additional Information

nsxa service being down might also cause vMotion issue as described in the KB
https://knowledge.broadcom.com/external/article/406081/nsxa-down-error-on-esxi-hosts-causing-vm.html