[Users] Bonding - VMs Network performance problem

Hi, I've got ovirt installed on 2 HP BL460c G6 blades, and my VMs have very poor network performance (around 7,01K/s). On the servers itselfs there is no problem, i can download a file with wget at around 99 M/s. Then i go to ovirt network configuration remove the bonding and then make the bonding again and the problem gets fixed (i have to do this everytime i reboot my blades). SERVER' s Software: CentOS 6.4 (64 bits) - 2.6.32-358.6.2.el6.x86_64 Ovirt EL6 official rpms. Anyone experienced this kind of problems? Best regards, Ricardo Esteves.