AW: [Xen-users] Urgent Network problem! Virtual network stops workingafter a few minutes/hours

["Rustedt, Florian" <Florian.Rustedt@xxxxxxxxxxx>]

..what about accessibility via vnc/framebuffer?
...what about CPU-usage of domU?

Last time i had this was while migrating drbd-layerd images from one xen to the 
other in bridged mode. It disturbt the drbd connection and drbd shut down. Then 
filesystem was gone for the domUs and in advance the domU failed some seconds 
later.

In that case you could reach it some more time via vnc until the system hangs 
because of missing blockdevices.

I solved that via routed networking, the automatic bridge-script destroyed my 
net-setup after migration.

Kind regards, Florian

> -----Ursprüngliche Nachricht-----
> Von: xen-users-bounces@xxxxxxxxxxxxxxxxxxx 
> [mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] Im Auftrag von 
> Martin Fernau
> Gesendet: Donnerstag, 5. März 2009 18:19
> An: xen-users@xxxxxxxxxxxxxxxxxxx
> Betreff: Re: [Xen-users] Urgent Network problem! Virtual 
> network stops workingafter a few minutes/hours
> 
> > Hi,
> >
> > > I'm using xen 3.3.0 on one server with 3 Guests (2 windows guest 
> > > with gplpv drivers and one linux). After booting the 
> machine all is 
> > > fine. The domains came up and network is working. But 
> after several 
> > > minutes or hours the network stops to work. I can't reach 
> the guests 
> > > any more! only dom0 is reachable
> >
> > Has this always been like this or just recently?
> The problems just started today. This machine runs "fine" 
> since a few month. 
> But after a reboot this morning the troubles begun...
> 
> 
> > > though the network. I asume the virtual network crashes.
> > > How can I find out where the problem is? Log files? 
> command line tools?
> > >
> > > This is an urgent problem as this machine is a live 
> server! Any help 
> > > would be very appreciated!
> >
> > Do you have control over the network switches? Maybe port 
> security is 
> > enabled on the port in the switch that you are connected to? I had 
> > this problem and the dom0 and domU would take turns going 
> on and off 
> > the network every few minutes. I had to tell the network 
> guys to turn 
> > port security off so that the switch allows multiple MAC 
> addresses on 
> > the same port.
> 
> To be more clear:
> I can't reach the guests neither from the network nor from 
> the dom0 itself - but I can reach then dom0 from the network. 
> This make me think that there must be something wrong with 
> the internas of xen or the virtual networking stack.
> 
> I'm using the bridging mode by the way.
> 
> Regards,
> Martin
> 
> _______________________________________________
> Xen-users mailing list
> Xen-users@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-users
> 
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