[PVE-User] Intel X710 10Gbit network card

Sten Aus sten.aus at eenet.ee
Wed Apr 15 21:03:02 CEST 2015

Thanks for the tip, but this was not the case.

On 15.04.15 21:24, Michael Rasmussen wrote:
> On Wed, 15 Apr 2015 21:01:35 +0300
> Sten Aus <sten.aus at eenet.ee> wrote:
>>> What does tcpdump disclose running on host and in VM?
>>> On host tcpdump -i vmbr10
>> Coworker did a lot of tcpdumps during the day and it appears the VM tap device is not getting ARPs back. I mean this tap device what qemu brings up/makes.
> A long shot. Try to disable hardware checksum offload since it is know
> to cause problems in virtualized environments.
> You can try with ethtool before making permanent changes: ethtool -K
> eth5 tx off
> If that works you could add it permanently to udev:
> Create this file: /etc/udev/rules.d/81-bridge.rules
> With the following content:
> ACTION=="add", SUBSYSTEM=="net", NAME=="vmbr*", RUN+="/sbin/ethtool -K
> $env{INTERFACE} tx off"

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