From: Stefan Hajnoczi <stefanha@gmail.com>
To: Chris Webb <chris@arachsys.com>
Cc: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] Intermittent e1000 failure on qemu-kvm 1.0
Date: Tue, 3 Apr 2012 08:13:28 +0100 [thread overview]
Message-ID: <20120403071328.GB27304@stefanha-thinkpad.localdomain> (raw)
In-Reply-To: <20120402153722.GA30499@arachsys.com>
On Mon, Apr 02, 2012 at 04:37:23PM +0100, Chris Webb wrote:
> We initially saw a problem after an upgrade from 0.15.x to 1.0.
Perhaps git-bisect(1) can help you track down the change that introduced
this between 0.15 and 1.0.
> Once I've got a guest with broken networking, the network stays down even if
> I do things like 'ip link set eth0 down; sleep 5; ip link set eth0 up'.
> Killing and restarting the same VM, it runs fine next time.
It sounds like this is not the issue, but are you sure the bridge has
forwarding delay set to 0 or Spanning Tree Protocol disabled? With STP
enabled no traffic will be forwarded by the bridge for a configured
timeout, and depending on the timing of your VM bootup you could see
weird things. You can check with brctl showstp br0.
Stefan
next prev parent reply other threads:[~2012-04-03 8:02 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-04-02 15:37 [Qemu-devel] Intermittent e1000 failure on qemu-kvm 1.0 Chris Webb
2012-04-03 7:13 ` Stefan Hajnoczi [this message]
2012-04-03 8:13 ` Chris Webb
2012-04-03 8:26 ` Stefan Hajnoczi
2012-04-03 12:42 ` Chris Webb
2012-04-03 13:34 ` Stefan Hajnoczi
2012-04-03 13:41 ` Chris Webb
2012-04-03 15:36 ` Stefan Hajnoczi
2012-04-03 16:37 ` Chris Webb
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