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Re: [Xen-devel] ARP problems in -testing?

To: Felipe Alfaro Solana <lkml@xxxxxxx>
Subject: Re: [Xen-devel] ARP problems in -testing?
From: Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
Date: Mon, 17 Jan 2005 13:41:40 +0000
Cc: Derrik Pates <demon@xxxxxxxxxxxxx>, Jan Kundrát <jan.kundrat@xxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxxx, Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>, Ron Watkins <xen-devel@xxxxxxxxx>
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> > Keir Fraser wrote:
> >> The MAC addresses from the tcpdump log look sane. The problem must lie
> >> elsewhere.
> >
> > I just tried this on a dedicated server located at thePlanet in Texas; 
> > I think this is an issue that combines the following:
> >
> >   - No MAC address specified causes a random MAC address to be 
> > selected at domain create time
> 
> Well, I can confirm this was the culprit of my problems: Xen was 
> selecting random MAC addresses at startup. I have fixed the problem by 
> manually and statically setting a predefined MAC address in the domain 
> config file:
> 
> vif = [ 'mac=XX:XX:XX:XX:XX:XX' ]
> 
> Now, the MAC address is always the same and thus I don't need the ugly 
> ping hack.
> Thanks.

I've fixed the netfront driver to send an unsolicited ARP reply
whenever an IP address gets brought up on it. This fix is in the
-testing and -unstable trees, and will end up in the forthcoming 2.0.4
stable release.

Perhaps someone could build the repository, return to using random MAC
addresses, and confirm that the problem has gone away?

 Thanks,
 Keir


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