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Hi Uwe, 

really I started directly with neutron. Never gone with legacy. 

But I suppose there's old config laying around. I still think that 
bridge_mapping is needed for VLAN config I use. Every paper describes 
GRE config, but I still feel more confortable using VLANs.

Any other help about this issue? Can someone confirm if I can get rid 
of the directives in both configs?

I suppose I cannot because they get in effect when started the ovs 
plugin.

Thank you in advance.



El dom, 14 de dic 2014 a las 8:40 , Uwe Sauter 
<uwe.sauter.de at gmail.com> escribió:
> Hi,
> 
> I presume that you upgraded from an older version that used 
> nova-network
> (now called legacy networking).
> 
> Using neutron means that VMs aren't connected to br0 directly any more
> as there is a whole virtual networking infrastructure in place.
> 
> To give a small overview:
> 
> On a compute node a VM connects to br-int (integration bridge). This
> bridge itself is connected through a virtual cable to br-tun 
> (tunneling
> bridge). That bridge has also assigned a physical interface that 
> allows
> traffic to flow to the network node
> 
> On the network node there also exists a br-tun that has a physical
> interface attached. Through this inferface traffic enters the node.
> br-tun is virtually connected to br-ex that has a separate physical
> interface attached that connects to "the outside", meaning the
> networking infrastructure outside your cloud.
> 
> I cannot help you with the configuration issue but recommend that you
> familiarize yourself with neutron.
> 
> Regards,
> 
> 	Uwe
> 
> Am 14.12.2014 um 19:36 schrieb Gonzalo Aguilar Delgado:
>>  Hi all, 
>>  
>>  I'm installing a new compute node from scratch and reviewing all old
>>  config. I've found two setting that seems equal, one in ml2 plugin 
>> and
>>  one in openvswitch.
>>  
>>  But I don't really understand why they are.
>>  
>>  ovs_neutron_plugin.ini:
>>  bridge_mappings = default:br0,extnet1:br-ex
>>  
>>  
>>  ml2/ml2_conf.ini:
>>  [ovs]
>>  bridge_mappings = default:br0,extnet1:br-ex
>>  
>>  
>>  For me it's strange the settings are in both places. I think this 
>> is a
>>  result of upgrading without taking much care of removing old config.
>>  
>>  
>>   But also it's strange that everything works with the bridges br0 
>> and
>>  br-ex without physical interface. I mean, seems to do nothing but it
>>  needs to be there.  
>>  Also I should expect VM be attached to br0 (Default) but it's not, 
>> they
>>  are attached to the br-int (integration bridge), for me this is 
>> correct.
>>  Since it's described here like this:
>>  
>>  https://openstack.redhat.com/Networking_in_too_much_detail
>>  
>>  And works ok. 
>>  
>>  So what's the purporse of these bridges?
>>  
>>  Here is:
>>  
>>  neutron 2.3.4
>>  nova      2.17.0
>>  
>>  Best regards,
>>  
>>  
>>  
>>  
>>  
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