Re: [Xen-devel] Re: [xen-discuss] problem with network in domU

[Maciej Browarski <Maciej.Browarski@xxxxxxx>]

michael schuster wrote:
> Maciej Browarski wrote:
> > 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 ?
> sounds a bit like you're having difficulty with checksums.
>
> the following is a way to disable ip checksums *in dom0*; I don't know 
> whether the same works in domU, but you could give it a try:
> Set "ip:dohwcksum" to 0 in /etc/system. Reboot, retest, report results.
>
> (btw: that means you need to add a line looking like this:
>     set ip:dohwcksum = 0
> to /etc/system in your domU)
>
> hth
Thanks :) it's works :)

Best Regards,
Maciej

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