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How to send NMI to Guest OS on ESXi 6.x (2149185)

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Purpose

This article provides steps to send NMI to Guest OS on ESXi6.x.

Note: Host client does not have HungVM - Send_NMI_To_Guest option. Therefore, ESXi 6.x cannot send NMI using host client.

Resolution

To send  NMI to Guest OS on ESXi 6.x, use one of these options:

  • Using WebClient:

    1. Log in to the vSphere Web Client. 
    2. Select vCenter from left panel. 
    3. Select VMs and Templates.
    4. Right-click Virtual machine > All vCenter Actions > Export Diagnostic Data.
    5. Select HungVM  > Send_NMI_To_Guest
    6. Click Generate Log Bundle.

  • Using vm-support command-line:

    1. Log in to ESXi host through SSH or console as root.

      Note: The virtual machine must be registered in the inventory.

    2. Run this command to list all registered and running virtual machines:

      vm-support --listvms
      vmdumper -l

    3. Run this command to Send NMI:

      vm-support -a HungVM:Send_NMI_To_Guest --vm=/vmfs/volumes/Path/of/VMname.vmx
  • Using vmdumper command-line:

    1. Log in to ESX/ESXi host through SSH or console as root.
    2. Run this command to get a list of all running virtual machines, identified by their World ID, path to the .vmx configuration file:

      ESXi: /sbin/vmdumper -l
      ESX : /usr/lib/vmware/bin/vmdumper -l

      Example output:

      wid=WorldID pid=-1 cfgFile="/vmfs/volumes/path/to/filename.vmx" uuid="ab cd ef ..." displayName="Virtual Machine Name"

    3. Run this command to Send NMI:

      vmdumper WorldID nmi

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