Linux guest crash cycles bacause of VMNET3 Bug in VMware ESX 6.5 Version 13

Behavior and Analysis

After we upgrades the VMWARE Version of an Actifio Appliance from ESX 6.5 Version 9 to 13 (the actual one) this Linux Guest crashed with VMware core dump again and again. Problem analysis was horrible.

Most time VMware HA had restarted the guest it crashed again if i tried to connect via SSH console. So it was a night mare in problem analysis but much time and a lot of retries later we succeded in scp download the vmcore files.

So we could analyse it and found the reason:

This is a known VMware Bug

Bug 191201 – Randomly freezes due to VMXNET3

This issue affects all virtual machines running on ESXi 6.5 host (with virtual hardware version 13), the guest will freeze randomly (sometimes several minutes after power on, and sometimes freezes several hours from boot).


  • Issue can be resolved with an ESX upgrade.
  • Several workaround allready exists.
  • We used this one: disable vmnet3 in VMs vmx file


  • VMware Bug 191201
  • A really good behavior description in Redhat Support Portal note 3001851


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