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 Thank you all for your suggestions!

 I was (and still am) confused since the manual says that the 
 nova-network create command should be run on the controller node. That 
 is obviously failing because no br100 is defined. So do I have to put 
 br100 on the controller as well or should I just create the network on 
 the compute node?
 What are the differences in these setups?

 Best,

 G.

 On Thu, 09 Jan 2014 10:05:54 -0600, Dimitri Maziuk wrote:
> On 1/9/2014 4:11 AM, Georgios Dimitrakakis wrote:
>> Hello again!
>>
>> No the br100 was not created automatically unfortunately! There is 
>> also
>> this bug report: 
>> https://bugs.launchpad.net/openstack-manuals/+bug/1241331
>
> I'm not 100% sure but I think in my case it did get created
> automatically when I tried to fire up the cirros instance the 2nd 
> time
> around... However, I may have created the bridge manually at some
> point while fighting with it, I forget.
>
> 
> https://access.redhat.com/site/documentation/en-US/Red_Hat_Enterprise_Linux/5/html/Virtualization/sect-Virtualization-Network_Configuration-Bridged_networking_with_libvirt.html
>
> (from "disable network manager" down to "restart networking or 
> reboot")
>
> Also check that vhost_net module is loaded (lsmod).
>
>> Since it wasn't created automatically I am asking if it has to be on
>> both nodes (controller + compute) in order for the network to work
>> correctly? Furthermore, I would like to know how should it be 
>> bridged in
>> order to achieve floating (public) IPs?
>
> Compute only: this is the interface VMs use to talk to the world.
> Floating IPs are a separate story really -- but if I uderstand the
> question correctly, your br100 should be bridged to the subnet where
> your floating IPs are.
>
> I.e. if your eth0 is on 1.2.3.0/24 and your eth1 is on 10.0.0.0/24,
> and you want floating IPs in 1.2.3.0/24 range, then you want to 
> bridge
> br100 to eth0.
>
> Dima
>
>
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