Hi @winproof ,
- I would first check if the BIOS/UEFI PCIs-firmware are up-to-date especially `TP-link TX-201` NIC if they're already up-to-date, consider testing with a different NIC model to see if the issue persists.
- Since the issue appears to be related to the backup involving the NFS storage, I would check the NFS server logs as well for any error or activity during the backup time.
- As @gfngfn256 said, the zimbra VM seems to be triggering the problem, I would check the zimbra VM logs again for any hidden issues or isolation the zimbra VM i.e., stop the zimbra VM in order to see if the issue still occurs. This can narrow down if the issue really related to that VM.
- I would first check if the BIOS/UEFI PCIs-firmware are up-to-date especially `TP-link TX-201` NIC if they're already up-to-date, consider testing with a different NIC model to see if the issue persists.
- Since the issue appears to be related to the backup involving the NFS storage, I would check the NFS server logs as well for any error or activity during the backup time.
- As @gfngfn256 said, the zimbra VM seems to be triggering the problem, I would check the zimbra VM logs again for any hidden issues or isolation the zimbra VM i.e., stop the zimbra VM in order to see if the issue still occurs. This can narrow down if the issue really related to that VM.