Xen users - Feb 2006 - Re^2: Again: tcp/ip traffic between domU and dom0 does not work

Hi Michael,

thank you for trying to help me. My syslog says nothing about the
problem. The network connection simply seems to freeze.

Any other ideas??  8-(

Kind regards,
Ingo


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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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