Re: Re^2: [Xen-users] Again: tcp/ip traffic between domU and dom0 does not work

[Michael Heyse <mhk@xxxxxxxxxxxxxxxxx>]

Ingo wrote:
> Hi Michael,
>
> thank you for trying to help me. My syslog says nothing about the
> problem. The network connection simply seems to freeze.

Just to be sure - you looked in both the dom0 and domU syslog? Maybe you could 
just try to reduce the MTU to 1490 for dom0 and domU and see if it works 
better. I experienced quite a few "it sometimes works almost" type of network 
problems in the past (not related to xen) and some of them were MTU related (-> 
tunnels, pppoe, ...).

> Any other ideas??  8-(

The other problem I had with xen were scheduling problems that caused a domain 
to almost freeze when another one was highly active. This made a large rsync 
from domU->dom0 impossible and resulted in a loss of the network connection. I 
solved this by executing a

xm sched-sedf ${DOMAIN} 0 0 0 1 1

for all domains including dom0. But I doubt that this is related to your 
problem...

Thanks,
Michael

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