конфиг машины
kernel = "/usr/lib/xen/boot/hvmloader"
builder='hvm'
memory = 4096
shadow_memory = 16
vcpus=8
pae=1
acpi=1
apic=1
device_model = '/usr/lib/xen/bin/qemu-dm'
name = "win2008"
#vif = [ 'type=ioemu, bridge=eth0, mac=aa:00:00:12:23:34' ] #Не работает
disk = [ 'phy:/dev/loop1,xvda,w', 'phy:/dev/loop0,xvdc:cdrom,r' ]
on_poweroff = 'destroy'
on_reboot   = 'restart'
on_crash    = 'restart'
boot="dc"
sdl=0
vnc=1
vnclisten="0.0.0.0"
vncdisplay=2
vncconsole=1
vncpasswd=''
stdvga=0
usb=1
usbdevice='mouse'
usbdevice='tablet'
ne2000=0

машина выключена
brctl show
bridge name     bridge id               STP enabled     interfaces
eth0            8000.003048b8d3fc       no              peth0

машина включена
brctl show              
bridge name     bridge id               STP enabled     interfaces
eth0            8000.003048b8d3fc       no              peth0
                                                        tap14.0