Virtual Machine Loses Network Connectivity After a Reboot

Products

• VMware vSphere ESXi

Issue/Introduction

Symptoms:
VM networking adapters will become unchecked upon reboot.

Cause

• All VM were created from the same template.
• "connect at Power on" box in the UI is unchecked within Virtual Machine > Edit Settings > Network Adapter > Device Status.
• From vmware.log of the corresponding VM:
  
  YYYY-MM-DDTHH:MM:SSZ| vmx| I125: DICT ethernet0.startConnected = "FALSE"
  
  This means that when VNIC is powered ON, it will start disconnected.

Resolution

• Please select the "connect at Power on" box in UI and configure the vm appropriately.
• Make sure that VM template has the correct configuration.