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On Wed, Aug 15, 2012 at 10:56 AM, Eugene Nelen <enelen at helioscloud.com> wrote:
>
>
> On Wed, Aug 15, 2012 at 5:31 PM, Thomas Vachon <vachon at sessionm.com> wrote:
>>
>> On Wed, Aug 15, 2012 at 10:28 AM, Narayan Desai <narayan.desai at gmail.com>
>> wrote:
>> > On Wed, Aug 15, 2012 at 9:16 AM, Thomas Vachon <vachon at sessionm.com>
>> > wrote:
>> >> On Wed, Aug 15, 2012 at 9:58 AM, Thomas Vachon <vachon at sessionm.com>
>> >> wrote:
>> >>> On Wed, Aug 15, 2012 at 8:54 AM, Thomas Vachon <vachon at sessionm.com>
>> >>> wrote:
>> >>>>
>> >>>> On Wed, Aug 15, 2012 at 8:53 AM, Narayan Desai
>> >>>> <narayan.desai at gmail.com> wrote:
>> >>>> > On Wed, Aug 15, 2012 at 7:24 AM, Thomas Vachon
>> >>>> > <vachon at sessionm.com> wrote:
>> >>>> >
>> >>>> >> I am also on Precise.  Downing/Up'ing the interface via VNC did
>> >>>> >> work.
>> >>>> >> How exactly did you setup vhost_net, can you provide your libvirt?
>> >>>> >
>> >>>> > Hm, that might mean that isn't the problem, but this is an easy
>> >>>> > enough
>> >>>> > thing to check.
>> >>>> >
>> >>>> > Setting up vhost_net is pretty easy; it is auto-detected by kvm, so
>> >>>> > all you need to do is modprobe it on the hypervisor.
>> >>>> >  -nld
>> >>>>
>> >>>> Found the docs saying that.  It might help, I will report back on
>> >>>> this
>> >>>> thread when I run the tests in a bit
>> >>>
>> >>> OK, I lost all connectivity between nova-network and my vm's.  DNSMasq
>> >>> is running and I added the vhost_net module (and confirmed libvirt
>> >>> sees it).  Do I need to do something to the guests now too?
>> >>
>> >> I think I found the root bug:
>> >> https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/997978
>> >
>> > Yeah, this is where i found the vhost_net workaround. (it seems to
>> > work for some people and not for others, so I suspect the problem is
>> > more complicated somehow)
>> >  -nld
>>
>> The workaround of adding it?  When I added it, I lose all connectivity
>> to the instances.
>
>
> I can confirm it.
> Instance can not get ip address from dnsmasq when vhost_net module is
> loaded.
> http://www.linux-kvm.org/page/VhostNet   see Caveats link.
>
> When I use virtio for instances and vhost_net module is not loaded
> my instances lose network connectivity.
>
>>

I actually have tg3 loaded, not bnx2.  I just realized they are
NetXtreme not II's

01:00.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5720
Gigabit Ethernet PCIe
01:00.1 Ethernet controller: Broadcom Corporation NetXtreme BCM5720
Gigabit Ethernet PCIe
02:00.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5720
Gigabit Ethernet PCIe
02:00.1 Ethernet controller: Broadcom Corporation NetXtreme BCM5720
Gigabit Ethernet PCIe


Eugene, looking at that caveat, I couldn't find a "solution", did you see one?