[Xen-users] Network trouble

[BERTRAND Joël <joel.bertrand@xxxxxxxxx>]

        Hello,

	I use Xen without any trouble for a long time. Last week, I have 
installed a new Xen system from sources :
- base system : Linux debian as host with backported kernel (4.8.15) ;
- Xen 4.8 built from sources.

        On this dom0, I have to start two domUs :
- Windows 7 POS (with VGA passthrough)
- Linux debian/stable

	Linux domU runs like a charm and network runs as expected. But I'm not 
able to obtain a running network in Windows domU. It's the first time I 
have this kind of trouble...
	Of course, I have installed XEN domU drivers for Windows host and I can 
see a network adapter in Windows (XEN net device driver). I have tried 
to obtain a running network interface with default Realtek emulation 
with no success.
        My windows.cfg configuration file is :

builder = 'hvm'
device_model_version="qemu-xen-traditional"
device_model_override = "/usr/local/lib/xen/bin/qemu-dm"

memory = 3200
vcpus = 4
cpus = ["0", "1", "2", "3"]
acpi = 1
apic = 1
name = "Windows"

vif = ['bridge=xenbr0,mac=01:23:45:67:89:ab']
disk = 
['phy:/dev/mapper/XEN_VMS-Windows,hda,w','file:/root/windows7emb64.iso,hdc:cdrom,r','file:/root/PV_driver_w7.iso,hdd:cdrom,r']
boot = "c"

vnc = 0

sdl = 0
serial = 'pty'
keymap = 'fr'

vif = ['bridge=xenbr0,mac=01:23:45:67:89:ab']
disk = 
['phy:/dev/mapper/XEN_VMS-Windows,hda,w','file:/root/windows7emb64.iso,hdc:cdrom,r','file:/root/PV_driver_w7.iso,hdd:cdrom,r']
boot = "c"

vnc = 0

sdl = 0
serial = 'pty'
keymap = 'fr'

pci = ['00:02.0','00:03.0','00:1b.0']
gfx_passthru = "igd"
viridian = 1
xen_platform_pci = 1
stdvga = 0

usb = 1
#usbdevice = ['tablet','host:3.5','host:3.6']
usbdevice = ['tablet','host:413c:2011','host:046d:c050']

#soundhw = "ac97"
pci_power_mgmt = 0

on_poweroff = "destroy"
on_reboot = "restart"
on_watchdog = "restart"
on_crash = "destroy"

	Windows indicates correct MAC address (01:23:45:67:89:ab), tries to 
send packets over interface, but no packet is received.
        I suppose I have done a mistake (maybe in XEN configuration). Any idea ?

        Best regards,

        JB

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