"There is no network assigned to this virtual machine" alert in the VM summary page in vCenter.

Products

• VMware vSphere ESXi

Issue/Introduction

• In the vCenter Server interface, the affected virtual machine shows the warning “There is no network assigned to this virtual machine” in the VM summary page in vCenter, indicating a missing or disconnected network adapter.

• The Virtual machine Edit Settings page shows no virtual network adapter.
  
  
  
  
• vmware.log for the VM contains information similar to the following:
  

  YYYY-MM-DDTHH:MM:SS In(05) vcpu-7 - Ethernet0 MAC Address: 00:50:56:xx:xx:xx
  YYYY-MM-DDTHH:MM:SS In(05) vcpu-7 - VMXNET3 user: Ethernet0 RSS fields requested by vmx: 3
  YYYY-MM-DDTHH:MM:SS In(05) vcpu-2 - Guest: Driver=vmxnet3, Version=1.9.20.0 - unloaded
  
  YYYY-MM-DDTHH:MM:SS In(05) vcpu-0 - Powering off Ethernet0
  YYYY-MM-DDTHH:MM:SS No(00) vcpu-0 - ConfigDB: Unsetting all entries with prefix "Ethernet0."
  YYYY-MM-DDTHH:MM:SS In(05) vcpu-0 - Hot removal done.

 

Environment

VMware vSphere ESXi 7.x
VMware vSphere ESXi 8.x

Cause

• The network adapter was ejected from the Windows guest operating system.

Resolution

As the guest OS is ejecting the network adapter, please contact your OS vendor to investigate the cause of this issue.

Workaround:

• Add a new network adapter to the virtual machine .For detailed steps, refer Add a Network Adapter to a Virtual Machine
• If you need to prevent network adapters from being hot-added in the future, disable the Hot-Add feature in the VM’s settings. Refer Disabling the HotAdd/HotPlug capability in virtual machines.

 

Additional Information

仮想マシンに対するネットワーク割り当ての消失