[Openstack] DHCP and kernel > 3.2

Anton Haldin ahaldin at griddynamics.com
Wed Sep 5 14:41:02 UTC 2012


I have the same issue  ( kernel 3.5 , guest vm cannot get response from
dnsmasq )


On Fri, Aug 10, 2012 at 7:08 AM, Lorin Hochstein
<lorin at nimbisservices.com>wrote:

>
> On Aug 9, 2012, at 3:22 AM, Alessandro Tagliapietra <
> tagliapietra.alessandro at gmail.com> wrote:
>
> > Hello guys,
> >
> > i've just installed kernel 3.4 from Ubuntu kernel PPA archive and after
> this upgrade VM aren't able to get the DHCP address but with tcpdump i see
> the request and offer on the network.
> > Someone else experienced this? I've tried also with 3.3, same story.
> Rolling back to 3.2 and everything works fine.
> >
>
>
> When I had a similar problem the issue turned out to be that I needed to
> configure the NIC on the compute host to be in promiscuous mode, otherwise
> the DHCP response wouldn't make it to the VM.
>
> Lorin
>
> Sent from my iPad
>
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