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Re: [Xen-users] Fixed MAC address causes spurios network connectivity lo

To: Eric Tessler <maiden1134@xxxxxxxxx>
Subject: Re: [Xen-users] Fixed MAC address causes spurios network connectivity loss
From: Eric Peterson <srcfoo@xxxxxxxxx>
Date: Thu, 22 Dec 2005 17:17:28 -0600
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I think I'm also having the same problem.

I have been running 3 domU's all day and everything worked fine.  Just now all but dom0 stopped responding to all network activity.  I've shutdown all domU and restarted them one at a time, but they still are not reachable.

Is this a config problem or a bug?

I am running Xen 3.0 installed from the FC4 xen install script.

On 12/20/05, Eric Tessler <maiden1134@xxxxxxxxx > wrote:
I appear to be having the same problem. I have 5 domU's running on the same machine, all of them with assigned fixed MAC addresses (all unique). Occasionally one of the domU's losses its network access (there is very little network activity). I cannot ping it from the outside in dom0 or from the other domUs.  No error messages from XEN or Linux. Sometimes it works, sometimes it doesn't.
I did a network trace of the ping and it looks as if the ARP response is not getting back to the domU (when pinging from within domU).  If I manually update the ARP table in the domU myself, the ping starts working. Also, if I set the ageing on the bridge to be 0, this also fixes the problem (but a bad workaround).
I am using XEN 2.07 on an AMD opteron.
Has anyone resolved this problem?

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