KVM гость debian тормозит сеть

mtr -s 1500 --interval 0.001 10.10.0.2 (ubuntu)
Host          Loss%   Snt   Last   Avg  Best  Wrst StDev
1. 10.10.0.2  0.0%  4082    2.0   1.4   1.2   4.5   0.5

mtr -s 1500 --interval 0.001 10.10.0.3 (debian)
Host          Loss%   Snt   Last   Avg  Best  Wrst StDev
1. 10.10.0.3  0.5%  6352    2.0   1.9   1.2   42.5   0.5

<domain type='kvm'>
  <name>debian</name>
  <uuid>afefwefwefwefwefwefwef</uuid>
  <memory>1048576</memory>
  <currentMemory>1048576</currentMemory>
  <vcpu cpuset='2-3'>2</vcpu>
  <os>
    <type arch='i686' machine='pc-0.12'>hvm</type>
    <boot dev='hd'/>
  </os>
  <features>
    <pae/>
  </features>
  <clock offset='utc'/>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>restart</on_reboot>
  <on_crash>restart</on_crash>
  <devices>
    <emulator>/usr/bin/kvm</emulator>
    <disk type='file' device='disk'>
      <driver name='qemu' type='raw'/>
      <source file='/var/lib/libvirt/images/debian.img'/>
      <target dev='vda' bus='virtio'/>
    </disk>
    <disk type='block' device='cdrom'>
      <driver name='qemu' type='raw'/>
      <target dev='hdc' bus='ide'/>
      <readonly/>
    </disk>
    <interface type='bridge'>
      <mac address='52:54:00:3e:0f:4b'/>
      <source bridge='br1'/>
      <model type='virtio'/>
    </interface>
    <interface type='bridge'>
      <mac address='52:54:00:3f:53:bc'/>
      <source bridge='br0'/>
      <model type='virtio'/>
    </interface>
    <console type='pty'>
      <target port='0'/>
    </console>
    <console type='pty'>
      <target port='0'/>
    </console>
    <input type='mouse' bus='ps2'/>
    <graphics type='vnc' port='-1' autoport='yes'/>
    <sound model='es1370'/>
    <video>
      <model type='cirrus' vram='9216' heads='1'/>
    </video>
  </devices>
</domain>