problem with network in domU

[Maciej Browarski <Maciej.Browarski@Sun.COM>]

Hello,
I'm using xen-3.1.2 downloaded today from repository.
As dom0 I have linux-kernel 2.6.18 and Debian distro.
As domU I install OpenSolaris Nevada 75a.
My config file looks:
name = 'osdev'
memory = '1024'
vcpus = 2
disk = [ 'file:/mnt/xen/osdev/disk.raw,0,w',  
'file:/mnt/xen/osdev/disk1.raw,1,w' ]
vif = [ '' ]
on_shutdown = 'destroy'
on_reboot = 'destroy'
on_crash = 'destroy'

After xm create I see new devices in dom0: peth0, xenbr0 and etc.
bash# brctl show
xenbr0          8000.feffffffffff       no              vif0.0
                                                        peth0
                                                        vif3.0
So, on dom0 outside network works fine, but on domU I have strange 
behavior ( dom0 and domU has addresses from DHCP).
 From domU I catch good address. I can also ping outside gateway but 
connect with any TCP/UDP ports outside my machine is incorrect (there 
are only SYN and SYN/ACK nothing more and timeout).
All connection between dom0 and domU works good.
Have you any idea what's wrong ?

Regards
Maciej