Re: Kvm network freeze

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On Wed, Apr 21, 2010 at 1:32 PM, Arthur CLEMENT <aclement@xxxxxxxxxxxx> wrote:
> I'm experiencing issues with libvirt/kvm on Debian lenny. I have two
> servers (32 and amd64) with kvm and openvz and each time I start or
> destroy a kvm domain the network freeze during 20 or 30 seconds (even my
> openvz vms lost their network).
> I think it might come from the bridge config, but this is just a thought.
>
> Any help would be most welcome


I had the same problem on a Slackware host.

The culprit in my case turned out to be the automatic create/destroy
tap functionality  with "-net tap". If I instead did "-net
tap,ifname=SomeTapName,script=no,downscript=no" then it all worked
flawlessly. Of course this solution requires that you know exactly how
many taps you need for a given host, so you can create them upfront,
but in my case that was not a problem.

:o)
Thomas Løcke
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