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 Thx, for the suggestions!

 So if I use FlatManager how can I create the network correct in order 
 for the instance to get an IP from a DHCP Server that I am running??? Is 
 the following correct and sufficient??

 CONTROLLER NODE
 ---------------
 nova network-create vmnet --fixed-range-v4=X.X.X.128/25 
 --bridge-interface=br100 --multi-host=T

 I understand that I have to change these two lines that you suggest on 
 the nova.conf file and then probably reboot the machine. Should I change 
 it at both the CONTROLLER and the COMPUTE nodes or just in one of them 
 and which???

 Best,

 G.

 On Wed, 15 Jan 2014 16:29:51 -0600, Dimitri Maziuk wrote:
> On 01/15/2014 03:18 PM, Georgios Dimitrakakis wrote:
>> Dear Dimitri and all,
>>  do you define the static IP for br100 somewhere or not???
>
> Yes, in my case it's in
> 
> /etc/sysconfig/[network-scripts,networking/devices,networking/profiles/default]/ifcfg-br100
> (it's the same file hardlinked from 3 places). (I am not sure if 
> that's
> the "proper redhat-6 way" of doing this, my configs got copied from
> centos 5.) The same way you have it:
>
>> # cat /etc/sysconfig/network-scripts/ifcfg-br100
> ...
>> IPADDR=X.X.X.210
> ...
>
>> I can ping the X.X.X.210 but that is because the br100 has static IP
>> X.X.X.210 and if I flush the iptables I can login to the already
>> available node and NOT at the CirrOS instance that should have the
>> X.X.X.210 IP.
>
> Ah, OK. No, the instance should not have the .210 ip. If you're using
> the default network manager (Flat+DHCP) you should define the 
> 10.0.0.0
> network, restart it all and then log on to your cirros instance via 
> vnc
> and see what ifconfig -a says. It should have an ip in 10.0.0.x 
> range,
> then you can continue troubleshooting from there.
>
> If you want your instances to be in the same X.X.X.X subnet as the
> br100, you'll need in your nova.conf
>  network_manager = nova.network.manager.FlatManager
>  firewall_driver = nova.virt.firewall.NoopFirewallDriver
> and then restart it all, then log on to your cirros instance via vnc 
> and
> give it a fixed ip -- not .210 -- or if you have a dhcp server on the
> X.X.X.X subnet the instance should get its ip from there.

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