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

Alex Crow acrow at integrafin.co.uk
Wed May 25 09:37:45 UTC 2016

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


ethtool -K ens3f0 lro off
ethtool -K ens3f1 lro off


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