[ovirt-users] Network problem with bonding and Windows guests

[Edward Haas]

On Wed, May 25, 2016 at 2:10 PM, Maxence Sartiaux <contact at makz.me> wrote:

> Yep work good !
>
> Adding
>
> ETHTOOL_OPTIONS='-K iface lro off'
>
> to the slave interfaces config file did the job :)
>
> Thank you !
>
> On Wed, 2016-05-25 at 10:37 +0100, Alex Crow wrote:
>
> On 25/05/16 10:28, Maxence Sartiaux wrote:
>
> Hello,
>
> I've a problem, all my ovirt hosts are linked with a bonding mode 4
> (802.3ad LACP) 2x10Gbps
> Eveything is okay with unix guest but with Windows guest, i can ping but
> internet browsing is impossible (sometime i have a part of the page, very
> rare case)
>
> If i remove the bonding and bridge one interface, windows work good.
>
> I've tried with windows 7 and windows 10, guest additions are installed
> VirtIO / rtl3189 tested, same problem
>
> My bonding opts : mode=4 lacp_rate=1 miimon=100
> Interface MTU 9000
>
> Bonding mode 2 also tested
>
>
> On the hosts, try setting LRO off on the members of your bond, see if it
> makes a difference
>
> eg,
>
> ethtool -K ens3f0 lro off
> ethtool -K ens3f1 lro off
>
> Alex
>
>
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There was such a bug with the bonding driver not dropping the LRO when bind
to a bridge.

Thanks,
Edy.
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