[Openstack] Weird Network problem

John Griffith john.griffith at solidfire.com
Wed May 28 23:11:30 UTC 2014

On Wed, May 28, 2014 at 4:46 PM, Georgios Dimitrakakis <giorgis at acmac.uoc.gr
> wrote:

> Hi!
> I am performing a new installation of openstack-icehouse on a CentOS 6.5
> machine (all-in-one).
> I have configured a FlatDHCP nova network and I can start succesfully a
> cirrOS instance.
> Moreover, I can ping it ( and I can ssh to it without any
> problems.
> The problem is that although I can resolve a hosts name (eg.
> www.google.com) from inside the instance I cannot ping it.
> It seems as if I cannot go outside my master host from inside that
> instance.
> The same thing happens if I provide a floating-ip to the instance. I can
> ping and ssh to the floating IP but if I ssh into the instance I cannot
> reach the "outside" world.
> Any ideas???
> Best,
> G.
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​Double check your settings for flat_interface and public_interface.
 Sounds like your bridge is not configured correctly so you're never
actually bridging to the public net.​  Is this multiple nics or single?
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