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[Xen-users] Re: Jeremy's GIT-tree and network problems

To: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-users] Re: Jeremy's GIT-tree and network problems
From: Stephan Seitz <stse+xen@xxxxxxxxxxxxxxxxxxx>
Date: Wed, 30 Dec 2009 13:57:05 +0100
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On Wed, Dec 30, 2009 at 12:41:53AM +0100, Markus Schuster wrote:
now - I wanted to start a thread of it's own later on - but could you try to lower the MTU of the interfaces that connects dom0 and domU to maybe 1400?

Yes I can try it, but I don’t think this will work.

Have you tried pinging an external IP address from dom0? Do you see the
following message in dom0s dmesg:
[2097720.211014] Attempting to checksum a non-TCP/UDP packet, dropping a
protocol 1 packet

Yes, I was using ping for the connectivity check (together with other tests). No, I never saw this line.

I see this message for ICMP traffic (and only for ICMP traffic!) between two
domUs in a setup similar to yours.
Maybe we suffer from the similar problem?

Doesn’t think so. My problem seems to be, that my network traffic to the Internet is getting lost at the NIC bridge that connects the DSL modem to the DomU if the traffic is generated by Dom0 (with DomU as the gateway) but not it the traffic is generated by DomU.

Shade and sweet water!


| Stephan Seitz             E-Mail: stse@xxxxxxxxxxxxxxxxxxx |
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